/*! tailwindcss v4.3.0 | MIT License | https://tailwindcss.com */
@layer properties{@supports (((-webkit-hyphens:none)) and (not (margin-trim:inline))) or ((-moz-orient:inline) and (not (color:rgb(from red r g b)))){*,:before,:after,::backdrop{--tw-rotate-x:initial;--tw-rotate-y:initial;--tw-rotate-z:initial;--tw-skew-x:initial;--tw-skew-y:initial;--tw-blur:initial;--tw-brightness:initial;--tw-contrast:initial;--tw-grayscale:initial;--tw-hue-rotate:initial;--tw-invert:initial;--tw-opacity:initial;--tw-saturate:initial;--tw-sepia:initial;--tw-drop-shadow:initial;--tw-drop-shadow-color:initial;--tw-drop-shadow-alpha:100%;--tw-drop-shadow-size:initial}}}@layer theme{:root,:host{--font-sans:ui-sans-serif, system-ui, sans-serif, "Apple Color Emoji", "Segoe UI Emoji", "Segoe UI Symbol", "Noto Color Emoji";--font-mono:ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, "Liberation Mono", "Courier New", monospace;--radius-sm:.25rem;--radius-md:.375rem;--radius-lg:.5rem;--shadow-sm:0 1px 3px 0 #0000001a, 0 1px 2px -1px #0000001a;--shadow-md:0 4px 6px -1px #0000001a, 0 2px 4px -2px #0000001a;--shadow-lg:0 10px 15px -3px #0000001a, 0 4px 6px -4px #0000001a;--default-font-family:var(--font-sans);--default-mono-font-family:var(--font-mono)}}@layer base{*,:after,:before,::backdrop{box-sizing:border-box;border:0 solid;margin:0;padding:0}::file-selector-button{box-sizing:border-box;border:0 solid;margin:0;padding:0}html,:host{-webkit-text-size-adjust:100%;tab-size:4;line-height:1.5;font-family:var(--default-font-family,ui-sans-serif, system-ui, sans-serif, "Apple Color Emoji", "Segoe UI Emoji", "Segoe UI Symbol", "Noto Color Emoji");font-feature-settings:var(--default-font-feature-settings,normal);font-variation-settings:var(--default-font-variation-settings,normal);-webkit-tap-highlight-color:transparent}hr{height:0;color:inherit;border-top-width:1px}abbr:where([title]){-webkit-text-decoration:underline dotted;text-decoration:underline dotted}h1,h2,h3,h4,h5,h6{font-size:inherit;font-weight:inherit}a{color:inherit;-webkit-text-decoration:inherit;-webkit-text-decoration:inherit;-webkit-text-decoration:inherit;-webkit-text-decoration:inherit;text-decoration:inherit}b,strong{font-weight:bolder}code,kbd,samp,pre{font-family:var(--default-mono-font-family,ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, "Liberation Mono", "Courier New", monospace);font-feature-settings:var(--default-mono-font-feature-settings,normal);font-variation-settings:var(--default-mono-font-variation-settings,normal);font-size:1em}small{font-size:80%}sub,sup{vertical-align:baseline;font-size:75%;line-height:0;position:relative}sub{bottom:-.25em}sup{top:-.5em}table{text-indent:0;border-color:inherit;border-collapse:collapse}:-moz-focusring{outline:auto}progress{vertical-align:baseline}summary{display:list-item}ol,ul,menu{list-style:none}img,svg,video,canvas,audio,iframe,embed,object{vertical-align:middle;display:block}img,video{max-width:100%;height:auto}button,input,select,optgroup,textarea{font:inherit;font-feature-settings:inherit;font-variation-settings:inherit;letter-spacing:inherit;color:inherit;opacity:1;background-color:#0000;border-radius:0}::file-selector-button{font:inherit;font-feature-settings:inherit;font-variation-settings:inherit;letter-spacing:inherit;color:inherit;opacity:1;background-color:#0000;border-radius:0}:where(select:is([multiple],[size])) optgroup{font-weight:bolder}:where(select:is([multiple],[size])) optgroup option{padding-inline-start:20px}::file-selector-button{margin-inline-end:4px}::placeholder{opacity:1}@supports (not ((-webkit-appearance:-apple-pay-button))) or (contain-intrinsic-size:1px){::placeholder{color:currentColor}@supports (color:color-mix(in lab, red, red)){::placeholder{color:color-mix(in oklab, currentcolor 50%, transparent)}}}textarea{resize:vertical}::-webkit-search-decoration{-webkit-appearance:none}::-webkit-date-and-time-value{min-height:1lh;text-align:inherit}::-webkit-datetime-edit{display:inline-flex}::-webkit-datetime-edit-fields-wrapper{padding:0}::-webkit-datetime-edit{padding-block:0}::-webkit-datetime-edit-year-field{padding-block:0}::-webkit-datetime-edit-month-field{padding-block:0}::-webkit-datetime-edit-day-field{padding-block:0}::-webkit-datetime-edit-hour-field{padding-block:0}::-webkit-datetime-edit-minute-field{padding-block:0}::-webkit-datetime-edit-second-field{padding-block:0}::-webkit-datetime-edit-millisecond-field{padding-block:0}::-webkit-datetime-edit-meridiem-field{padding-block:0}::-webkit-calendar-picker-indicator{line-height:1}:-moz-ui-invalid{box-shadow:none}button,input:where([type=button],[type=reset],[type=submit]){appearance:button}::file-selector-button{appearance:button}::-webkit-inner-spin-button{height:auto}::-webkit-outer-spin-button{height:auto}[hidden]:where(:not([hidden=until-found])){display:none!important}}@layer components;@layer utilities{.visible{visibility:visible}.sr-only{clip-path:inset(50%);white-space:nowrap;border-width:0;width:1px;height:1px;margin:-1px;padding:0;position:absolute;overflow:hidden}.fixed{position:fixed}.relative{position:relative}.static{position:static}.container{width:100%}@media (width>=40rem){.container{max-width:40rem}}@media (width>=48rem){.container{max-width:48rem}}@media (width>=64rem){.container{max-width:64rem}}@media (width>=80rem){.container{max-width:80rem}}@media (width>=96rem){.container{max-width:96rem}}.block{display:block}.hidden{display:none}.inline{display:inline}.list-item{display:list-item}.table{display:table}.max-w-none{max-width:none}.transform{transform:var(--tw-rotate-x,) var(--tw-rotate-y,) var(--tw-rotate-z,) var(--tw-skew-x,) var(--tw-skew-y,)}.filter{filter:var(--tw-blur,) var(--tw-brightness,) var(--tw-contrast,) var(--tw-grayscale,) var(--tw-hue-rotate,) var(--tw-invert,) var(--tw-saturate,) var(--tw-sepia,) var(--tw-drop-shadow,)}}@font-face{font-display:block;font-family:KaTeX_AMS;font-style:normal;font-weight:400;src:url(/assets/KaTeX_AMS-Regular-BQhdFMY1.woff2)format("woff2"),url(/assets/KaTeX_AMS-Regular-DMm9YOAa.woff)format("woff"),url(/assets/KaTeX_AMS-Regular-DRggAlZN.ttf)format("truetype")}@font-face{font-display:block;font-family:KaTeX_Caligraphic;font-style:normal;font-weight:700;src:url(/assets/KaTeX_Caligraphic-Bold-Dq_IR9rO.woff2)format("woff2"),url(/assets/KaTeX_Caligraphic-Bold-BEiXGLvX.woff)format("woff"),url(/assets/KaTeX_Caligraphic-Bold-ATXxdsX0.ttf)format("truetype")}@font-face{font-display:block;font-family:KaTeX_Caligraphic;font-style:normal;font-weight:400;src:url(/assets/KaTeX_Caligraphic-Regular-Di6jR-x-.woff2)format("woff2"),url(/assets/KaTeX_Caligraphic-Regular-CTRA-rTL.woff)format("woff"),url(/assets/KaTeX_Caligraphic-Regular-wX97UBjC.ttf)format("truetype")}@font-face{font-display:block;font-family:KaTeX_Fraktur;font-style:normal;font-weight:700;src:url(/assets/KaTeX_Fraktur-Bold-CL6g_b3V.woff2)format("woff2"),url(/assets/KaTeX_Fraktur-Bold-BsDP51OF.woff)format("woff"),url(/assets/KaTeX_Fraktur-Bold-BdnERNNW.ttf)format("truetype")}@font-face{font-display:block;font-family:KaTeX_Fraktur;font-style:normal;font-weight:400;src:url(/assets/KaTeX_Fraktur-Regular-CTYiF6lA.woff2)format("woff2"),url(/assets/KaTeX_Fraktur-Regular-Dxdc4cR9.woff)format("woff"),url(/assets/KaTeX_Fraktur-Regular-CB_wures.ttf)format("truetype")}@font-face{font-display:block;font-family:KaTeX_Main;font-style:normal;font-weight:700;src:url(/assets/KaTeX_Main-Bold-Cx986IdX.woff2)format("woff2"),url(/assets/KaTeX_Main-Bold-Jm3AIy58.woff)format("woff"),url(/assets/KaTeX_Main-Bold-waoOVXN0.ttf)format("truetype")}@font-face{font-display:block;font-family:KaTeX_Main;font-style:italic;font-weight:700;src:url(/assets/KaTeX_Main-BoldItalic-DxDJ3AOS.woff2)format("woff2"),url(/assets/KaTeX_Main-BoldItalic-SpSLRI95.woff)format("woff"),url(/assets/KaTeX_Main-BoldItalic-DzxPMmG6.ttf)format("truetype")}@font-face{font-display:block;font-family:KaTeX_Main;font-style:italic;font-weight:400;src:url(/assets/KaTeX_Main-Italic-NWA7e6Wa.woff2)format("woff2"),url(/assets/KaTeX_Main-Italic-BMLOBm91.woff)format("woff"),url(/assets/KaTeX_Main-Italic-3WenGoN9.ttf)format("truetype")}@font-face{font-display:block;font-family:KaTeX_Main;font-style:normal;font-weight:400;src:url(/assets/KaTeX_Main-Regular-B22Nviop.woff2)format("woff2"),url(/assets/KaTeX_Main-Regular-Dr94JaBh.woff)format("woff"),url(/assets/KaTeX_Main-Regular-ypZvNtVU.ttf)format("truetype")}@font-face{font-display:block;font-family:KaTeX_Math;font-style:italic;font-weight:700;src:url(/assets/KaTeX_Math-BoldItalic-CZnvNsCZ.woff2)format("woff2"),url(/assets/KaTeX_Math-BoldItalic-iY-2wyZ7.woff)format("woff"),url(/assets/KaTeX_Math-BoldItalic-B3XSjfu4.ttf)format("truetype")}@font-face{font-display:block;font-family:KaTeX_Math;font-style:italic;font-weight:400;src:url(/assets/KaTeX_Math-Italic-t53AETM-.woff2)format("woff2"),url(/assets/KaTeX_Math-Italic-DA0__PXp.woff)format("woff"),url(/assets/KaTeX_Math-Italic-flOr_0UB.ttf)format("truetype")}@font-face{font-display:block;font-family:KaTeX_SansSerif;font-style:normal;font-weight:700;src:url(/assets/KaTeX_SansSerif-Bold-D1sUS0GD.woff2)format("woff2"),url(/assets/KaTeX_SansSerif-Bold-DbIhKOiC.woff)format("woff"),url(/assets/KaTeX_SansSerif-Bold-CFMepnvq.ttf)format("truetype")}@font-face{font-display:block;font-family:KaTeX_SansSerif;font-style:italic;font-weight:400;src:url(/assets/KaTeX_SansSerif-Italic-C3H0VqGB.woff2)format("woff2"),url(/assets/KaTeX_SansSerif-Italic-DN2j7dab.woff)format("woff"),url(/assets/KaTeX_SansSerif-Italic-YYjJ1zSn.ttf)format("truetype")}@font-face{font-display:block;font-family:KaTeX_SansSerif;font-style:normal;font-weight:400;src:url(/assets/KaTeX_SansSerif-Regular-DDBCnlJ7.woff2)format("woff2"),url(/assets/KaTeX_SansSerif-Regular-CS6fqUqJ.woff)format("woff"),url(/assets/KaTeX_SansSerif-Regular-BNo7hRIc.ttf)format("truetype")}@font-face{font-display:block;font-family:KaTeX_Script;font-style:normal;font-weight:400;src:url(/assets/KaTeX_Script-Regular-D3wIWfF6.woff2)format("woff2"),url(/assets/KaTeX_Script-Regular-D5yQViql.woff)format("woff"),url(/assets/KaTeX_Script-Regular-C5JkGWo-.ttf)format("truetype")}@font-face{font-display:block;font-family:KaTeX_Size1;font-style:normal;font-weight:400;src:url(/assets/KaTeX_Size1-Regular-mCD8mA8B.woff2)format("woff2"),url(/assets/KaTeX_Size1-Regular-C195tn64.woff)format("woff"),url(/assets/KaTeX_Size1-Regular-Dbsnue_I.ttf)format("truetype")}@font-face{font-display:block;font-family:KaTeX_Size2;font-style:normal;font-weight:400;src:url(/assets/KaTeX_Size2-Regular-Dy4dx90m.woff2)format("woff2"),url(/assets/KaTeX_Size2-Regular-oD1tc_U0.woff)format("woff"),url(/assets/KaTeX_Size2-Regular-B7gKUWhC.ttf)format("truetype")}@font-face{font-display:block;font-family:KaTeX_Size3;font-style:normal;font-weight:400;src:url(data:font/woff2;base64,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)format("woff2"),url(/assets/KaTeX_Size3-Regular-CTq5MqoE.woff)format("woff"),url(/assets/KaTeX_Size3-Regular-DgpXs0kz.ttf)format("truetype")}@font-face{font-display:block;font-family:KaTeX_Size4;font-style:normal;font-weight:400;src:url(/assets/KaTeX_Size4-Regular-Dl5lxZxV.woff2)format("woff2"),url(/assets/KaTeX_Size4-Regular-BF-4gkZK.woff)format("woff"),url(/assets/KaTeX_Size4-Regular-DWFBv043.ttf)format("truetype")}@font-face{font-display:block;font-family:KaTeX_Typewriter;font-style:normal;font-weight:400;src:url(/assets/KaTeX_Typewriter-Regular-CO6r4hn1.woff2)format("woff2"),url(/assets/KaTeX_Typewriter-Regular-C0xS9mPB.woff)format("woff"),url(/assets/KaTeX_Typewriter-Regular-D3Ib7_Hf.ttf)format("truetype")}.katex{text-indent:0;text-rendering:auto;font:1.21em/1.2 KaTeX_Main,Times New Roman,serif;position:relative}.katex *{border-color:currentColor;-ms-high-contrast-adjust:none!important}.katex .katex-version:after{content:"0.16.47"}.katex .katex-mathml{clip-path:inset(50%);border:0;width:1px;height:1px;padding:0;position:absolute;overflow:hidden}.katex .katex-html>.newline{display:block}.katex .base{white-space:nowrap;width:min-content;position:relative}.katex .base,.katex .strut{display:inline-block}.katex .textbf{font-weight:700}.katex .textit{font-style:italic}.katex .textrm{font-family:KaTeX_Main}.katex .textsf{font-family:KaTeX_SansSerif}.katex .texttt{font-family:KaTeX_Typewriter}.katex .mathnormal{font-family:KaTeX_Math;font-style:italic}.katex .mathit{font-family:KaTeX_Main;font-style:italic}.katex .mathrm{font-style:normal}.katex .mathbf{font-family:KaTeX_Main;font-weight:700}.katex .boldsymbol{font-family:KaTeX_Math;font-style:italic;font-weight:700}.katex .amsrm,.katex .mathbb,.katex .textbb{font-family:KaTeX_AMS}.katex .mathcal{font-family:KaTeX_Caligraphic}.katex .mathfrak,.katex .textfrak{font-family:KaTeX_Fraktur}.katex .mathboldfrak,.katex .textboldfrak{font-family:KaTeX_Fraktur;font-weight:700}.katex .mathtt{font-family:KaTeX_Typewriter}.katex .mathscr,.katex .textscr{font-family:KaTeX_Script}.katex .mathsf,.katex .textsf{font-family:KaTeX_SansSerif}.katex .mathboldsf,.katex .textboldsf{font-family:KaTeX_SansSerif;font-weight:700}.katex .mathitsf,.katex .mathsfit,.katex .textitsf{font-family:KaTeX_SansSerif;font-style:italic}.katex .mainrm{font-family:KaTeX_Main;font-style:normal}.katex .vlist-t{border-collapse:collapse;table-layout:fixed;display:inline-table}.katex .vlist-r{display:table-row}.katex .vlist{vertical-align:bottom;display:table-cell;position:relative}.katex .vlist>span{height:0;display:block;position:relative}.katex .vlist>span>span{display:inline-block}.katex .vlist>span>.pstrut{width:0;overflow:hidden}.katex .vlist-t2{margin-right:-2px}.katex .vlist-s{vertical-align:bottom;width:2px;min-width:2px;font-size:1px;display:table-cell}.katex .vbox{flex-direction:column;align-items:baseline;display:inline-flex}.katex .hbox{width:100%}.katex .hbox,.katex .thinbox{flex-direction:row;display:inline-flex}.katex .thinbox{width:0;max-width:0}.katex .msupsub{text-align:left}.katex .mfrac>span>span{text-align:center}.katex .mfrac .frac-line{border-bottom-style:solid;width:100%;display:inline-block}.katex .hdashline,.katex .hline,.katex .mfrac .frac-line,.katex .overline .overline-line,.katex .rule,.katex .underline .underline-line{min-height:1px}.katex .mspace{display:inline-block}.katex .smash{line-height:0;display:inline}.katex .clap,.katex .llap,.katex .rlap{width:0;position:relative}.katex .clap>.inner,.katex .llap>.inner,.katex .rlap>.inner{position:absolute}.katex .clap>.fix,.katex .llap>.fix,.katex .rlap>.fix{display:inline-block}.katex .llap>.inner{right:0}.katex .clap>.inner,.katex .rlap>.inner{left:0}.katex .clap>.inner>span{margin-left:-50%;margin-right:50%}.katex .rule{border:0 solid;display:inline-block;position:relative}.katex .hline,.katex .overline .overline-line,.katex .underline .underline-line{border-bottom-style:solid;width:100%;display:inline-block}.katex .hdashline{border-bottom-style:dashed;width:100%;display:inline-block}.katex .sqrt>.root{margin-left:.277778em;margin-right:-.555556em}.katex .fontsize-ensurer.reset-size1.size1,.katex .sizing.reset-size1.size1{font-size:1em}.katex .fontsize-ensurer.reset-size1.size2,.katex .sizing.reset-size1.size2{font-size:1.2em}.katex .fontsize-ensurer.reset-size1.size3,.katex .sizing.reset-size1.size3{font-size:1.4em}.katex .fontsize-ensurer.reset-size1.size4,.katex .sizing.reset-size1.size4{font-size:1.6em}.katex .fontsize-ensurer.reset-size1.size5,.katex .sizing.reset-size1.size5{font-size:1.8em}.katex .fontsize-ensurer.reset-size1.size6,.katex .sizing.reset-size1.size6{font-size:2em}.katex .fontsize-ensurer.reset-size1.size7,.katex .sizing.reset-size1.size7{font-size:2.4em}.katex .fontsize-ensurer.reset-size1.size8,.katex .sizing.reset-size1.size8{font-size:2.88em}.katex .fontsize-ensurer.reset-size1.size9,.katex .sizing.reset-size1.size9{font-size:3.456em}.katex .fontsize-ensurer.reset-size1.size10,.katex .sizing.reset-size1.size10{font-size:4.148em}.katex .fontsize-ensurer.reset-size1.size11,.katex .sizing.reset-size1.size11{font-size:4.976em}.katex .fontsize-ensurer.reset-size2.size1,.katex .sizing.reset-size2.size1{font-size:.833333em}.katex .fontsize-ensurer.reset-size2.size2,.katex .sizing.reset-size2.size2{font-size:1em}.katex .fontsize-ensurer.reset-size2.size3,.katex .sizing.reset-size2.size3{font-size:1.16667em}.katex .fontsize-ensurer.reset-size2.size4,.katex .sizing.reset-size2.size4{font-size:1.33333em}.katex .fontsize-ensurer.reset-size2.size5,.katex .sizing.reset-size2.size5{font-size:1.5em}.katex .fontsize-ensurer.reset-size2.size6,.katex .sizing.reset-size2.size6{font-size:1.66667em}.katex .fontsize-ensurer.reset-size2.size7,.katex .sizing.reset-size2.size7{font-size:2em}.katex .fontsize-ensurer.reset-size2.size8,.katex .sizing.reset-size2.size8{font-size:2.4em}.katex .fontsize-ensurer.reset-size2.size9,.katex .sizing.reset-size2.size9{font-size:2.88em}.katex .fontsize-ensurer.reset-size2.size10,.katex .sizing.reset-size2.size10{font-size:3.45667em}.katex .fontsize-ensurer.reset-size2.size11,.katex .sizing.reset-size2.size11{font-size:4.14667em}.katex .fontsize-ensurer.reset-size3.size1,.katex .sizing.reset-size3.size1{font-size:.714286em}.katex .fontsize-ensurer.reset-size3.size2,.katex .sizing.reset-size3.size2{font-size:.857143em}.katex .fontsize-ensurer.reset-size3.size3,.katex .sizing.reset-size3.size3{font-size:1em}.katex .fontsize-ensurer.reset-size3.size4,.katex .sizing.reset-size3.size4{font-size:1.14286em}.katex .fontsize-ensurer.reset-size3.size5,.katex .sizing.reset-size3.size5{font-size:1.28571em}.katex .fontsize-ensurer.reset-size3.size6,.katex .sizing.reset-size3.size6{font-size:1.42857em}.katex .fontsize-ensurer.reset-size3.size7,.katex .sizing.reset-size3.size7{font-size:1.71429em}.katex .fontsize-ensurer.reset-size3.size8,.katex .sizing.reset-size3.size8{font-size:2.05714em}.katex .fontsize-ensurer.reset-size3.size9,.katex .sizing.reset-size3.size9{font-size:2.46857em}.katex .fontsize-ensurer.reset-size3.size10,.katex .sizing.reset-size3.size10{font-size:2.96286em}.katex .fontsize-ensurer.reset-size3.size11,.katex .sizing.reset-size3.size11{font-size:3.55429em}.katex .fontsize-ensurer.reset-size4.size1,.katex .sizing.reset-size4.size1{font-size:.625em}.katex .fontsize-ensurer.reset-size4.size2,.katex .sizing.reset-size4.size2{font-size:.75em}.katex .fontsize-ensurer.reset-size4.size3,.katex .sizing.reset-size4.size3{font-size:.875em}.katex .fontsize-ensurer.reset-size4.size4,.katex .sizing.reset-size4.size4{font-size:1em}.katex .fontsize-ensurer.reset-size4.size5,.katex .sizing.reset-size4.size5{font-size:1.125em}.katex .fontsize-ensurer.reset-size4.size6,.katex .sizing.reset-size4.size6{font-size:1.25em}.katex .fontsize-ensurer.reset-size4.size7,.katex .sizing.reset-size4.size7{font-size:1.5em}.katex .fontsize-ensurer.reset-size4.size8,.katex .sizing.reset-size4.size8{font-size:1.8em}.katex .fontsize-ensurer.reset-size4.size9,.katex .sizing.reset-size4.size9{font-size:2.16em}.katex .fontsize-ensurer.reset-size4.size10,.katex .sizing.reset-size4.size10{font-size:2.5925em}.katex .fontsize-ensurer.reset-size4.size11,.katex .sizing.reset-size4.size11{font-size:3.11em}.katex .fontsize-ensurer.reset-size5.size1,.katex .sizing.reset-size5.size1{font-size:.555556em}.katex .fontsize-ensurer.reset-size5.size2,.katex .sizing.reset-size5.size2{font-size:.666667em}.katex .fontsize-ensurer.reset-size5.size3,.katex .sizing.reset-size5.size3{font-size:.777778em}.katex .fontsize-ensurer.reset-size5.size4,.katex .sizing.reset-size5.size4{font-size:.888889em}.katex .fontsize-ensurer.reset-size5.size5,.katex .sizing.reset-size5.size5{font-size:1em}.katex .fontsize-ensurer.reset-size5.size6,.katex .sizing.reset-size5.size6{font-size:1.11111em}.katex .fontsize-ensurer.reset-size5.size7,.katex .sizing.reset-size5.size7{font-size:1.33333em}.katex .fontsize-ensurer.reset-size5.size8,.katex .sizing.reset-size5.size8{font-size:1.6em}.katex .fontsize-ensurer.reset-size5.size9,.katex .sizing.reset-size5.size9{font-size:1.92em}.katex .fontsize-ensurer.reset-size5.size10,.katex .sizing.reset-size5.size10{font-size:2.30444em}.katex .fontsize-ensurer.reset-size5.size11,.katex .sizing.reset-size5.size11{font-size:2.76444em}.katex .fontsize-ensurer.reset-size6.size1,.katex .sizing.reset-size6.size1{font-size:.5em}.katex .fontsize-ensurer.reset-size6.size2,.katex .sizing.reset-size6.size2{font-size:.6em}.katex .fontsize-ensurer.reset-size6.size3,.katex .sizing.reset-size6.size3{font-size:.7em}.katex .fontsize-ensurer.reset-size6.size4,.katex .sizing.reset-size6.size4{font-size:.8em}.katex .fontsize-ensurer.reset-size6.size5,.katex .sizing.reset-size6.size5{font-size:.9em}.katex .fontsize-ensurer.reset-size6.size6,.katex .sizing.reset-size6.size6{font-size:1em}.katex .fontsize-ensurer.reset-size6.size7,.katex .sizing.reset-size6.size7{font-size:1.2em}.katex .fontsize-ensurer.reset-size6.size8,.katex .sizing.reset-size6.size8{font-size:1.44em}.katex .fontsize-ensurer.reset-size6.size9,.katex .sizing.reset-size6.size9{font-size:1.728em}.katex .fontsize-ensurer.reset-size6.size10,.katex .sizing.reset-size6.size10{font-size:2.074em}.katex .fontsize-ensurer.reset-size6.size11,.katex .sizing.reset-size6.size11{font-size:2.488em}.katex .fontsize-ensurer.reset-size7.size1,.katex .sizing.reset-size7.size1{font-size:.416667em}.katex .fontsize-ensurer.reset-size7.size2,.katex .sizing.reset-size7.size2{font-size:.5em}.katex .fontsize-ensurer.reset-size7.size3,.katex .sizing.reset-size7.size3{font-size:.583333em}.katex .fontsize-ensurer.reset-size7.size4,.katex .sizing.reset-size7.size4{font-size:.666667em}.katex .fontsize-ensurer.reset-size7.size5,.katex .sizing.reset-size7.size5{font-size:.75em}.katex .fontsize-ensurer.reset-size7.size6,.katex .sizing.reset-size7.size6{font-size:.833333em}.katex .fontsize-ensurer.reset-size7.size7,.katex .sizing.reset-size7.size7{font-size:1em}.katex .fontsize-ensurer.reset-size7.size8,.katex .sizing.reset-size7.size8{font-size:1.2em}.katex .fontsize-ensurer.reset-size7.size9,.katex .sizing.reset-size7.size9{font-size:1.44em}.katex .fontsize-ensurer.reset-size7.size10,.katex .sizing.reset-size7.size10{font-size:1.72833em}.katex .fontsize-ensurer.reset-size7.size11,.katex .sizing.reset-size7.size11{font-size:2.07333em}.katex .fontsize-ensurer.reset-size8.size1,.katex .sizing.reset-size8.size1{font-size:.347222em}.katex .fontsize-ensurer.reset-size8.size2,.katex .sizing.reset-size8.size2{font-size:.416667em}.katex .fontsize-ensurer.reset-size8.size3,.katex .sizing.reset-size8.size3{font-size:.486111em}.katex .fontsize-ensurer.reset-size8.size4,.katex .sizing.reset-size8.size4{font-size:.555556em}.katex .fontsize-ensurer.reset-size8.size5,.katex .sizing.reset-size8.size5{font-size:.625em}.katex .fontsize-ensurer.reset-size8.size6,.katex .sizing.reset-size8.size6{font-size:.694444em}.katex .fontsize-ensurer.reset-size8.size7,.katex .sizing.reset-size8.size7{font-size:.833333em}.katex .fontsize-ensurer.reset-size8.size8,.katex .sizing.reset-size8.size8{font-size:1em}.katex .fontsize-ensurer.reset-size8.size9,.katex .sizing.reset-size8.size9{font-size:1.2em}.katex .fontsize-ensurer.reset-size8.size10,.katex .sizing.reset-size8.size10{font-size:1.44028em}.katex .fontsize-ensurer.reset-size8.size11,.katex .sizing.reset-size8.size11{font-size:1.72778em}.katex .fontsize-ensurer.reset-size9.size1,.katex .sizing.reset-size9.size1{font-size:.289352em}.katex .fontsize-ensurer.reset-size9.size2,.katex .sizing.reset-size9.size2{font-size:.347222em}.katex .fontsize-ensurer.reset-size9.size3,.katex .sizing.reset-size9.size3{font-size:.405093em}.katex .fontsize-ensurer.reset-size9.size4,.katex .sizing.reset-size9.size4{font-size:.462963em}.katex .fontsize-ensurer.reset-size9.size5,.katex .sizing.reset-size9.size5{font-size:.520833em}.katex .fontsize-ensurer.reset-size9.size6,.katex .sizing.reset-size9.size6{font-size:.578704em}.katex .fontsize-ensurer.reset-size9.size7,.katex .sizing.reset-size9.size7{font-size:.694444em}.katex .fontsize-ensurer.reset-size9.size8,.katex .sizing.reset-size9.size8{font-size:.833333em}.katex .fontsize-ensurer.reset-size9.size9,.katex .sizing.reset-size9.size9{font-size:1em}.katex .fontsize-ensurer.reset-size9.size10,.katex .sizing.reset-size9.size10{font-size:1.20023em}.katex .fontsize-ensurer.reset-size9.size11,.katex .sizing.reset-size9.size11{font-size:1.43981em}.katex .fontsize-ensurer.reset-size10.size1,.katex .sizing.reset-size10.size1{font-size:.24108em}.katex .fontsize-ensurer.reset-size10.size2,.katex .sizing.reset-size10.size2{font-size:.289296em}.katex .fontsize-ensurer.reset-size10.size3,.katex .sizing.reset-size10.size3{font-size:.337512em}.katex .fontsize-ensurer.reset-size10.size4,.katex .sizing.reset-size10.size4{font-size:.385728em}.katex .fontsize-ensurer.reset-size10.size5,.katex .sizing.reset-size10.size5{font-size:.433944em}.katex .fontsize-ensurer.reset-size10.size6,.katex .sizing.reset-size10.size6{font-size:.48216em}.katex .fontsize-ensurer.reset-size10.size7,.katex .sizing.reset-size10.size7{font-size:.578592em}.katex .fontsize-ensurer.reset-size10.size8,.katex .sizing.reset-size10.size8{font-size:.694311em}.katex .fontsize-ensurer.reset-size10.size9,.katex .sizing.reset-size10.size9{font-size:.833173em}.katex .fontsize-ensurer.reset-size10.size10,.katex .sizing.reset-size10.size10{font-size:1em}.katex .fontsize-ensurer.reset-size10.size11,.katex .sizing.reset-size10.size11{font-size:1.19961em}.katex .fontsize-ensurer.reset-size11.size1,.katex .sizing.reset-size11.size1{font-size:.200965em}.katex .fontsize-ensurer.reset-size11.size2,.katex .sizing.reset-size11.size2{font-size:.241158em}.katex .fontsize-ensurer.reset-size11.size3,.katex .sizing.reset-size11.size3{font-size:.281351em}.katex .fontsize-ensurer.reset-size11.size4,.katex .sizing.reset-size11.size4{font-size:.321543em}.katex .fontsize-ensurer.reset-size11.size5,.katex .sizing.reset-size11.size5{font-size:.361736em}.katex .fontsize-ensurer.reset-size11.size6,.katex .sizing.reset-size11.size6{font-size:.401929em}.katex .fontsize-ensurer.reset-size11.size7,.katex .sizing.reset-size11.size7{font-size:.482315em}.katex .fontsize-ensurer.reset-size11.size8,.katex .sizing.reset-size11.size8{font-size:.578778em}.katex .fontsize-ensurer.reset-size11.size9,.katex .sizing.reset-size11.size9{font-size:.694534em}.katex .fontsize-ensurer.reset-size11.size10,.katex .sizing.reset-size11.size10{font-size:.833601em}.katex .fontsize-ensurer.reset-size11.size11,.katex .sizing.reset-size11.size11{font-size:1em}.katex .delimsizing.size1{font-family:KaTeX_Size1}.katex .delimsizing.size2{font-family:KaTeX_Size2}.katex .delimsizing.size3{font-family:KaTeX_Size3}.katex .delimsizing.size4{font-family:KaTeX_Size4}.katex .delimsizing.mult .delim-size1>span{font-family:KaTeX_Size1}.katex .delimsizing.mult .delim-size4>span{font-family:KaTeX_Size4}.katex .nulldelimiter{width:.12em;display:inline-block}.katex .delimcenter,.katex .op-symbol{position:relative}.katex .op-symbol.small-op{font-family:KaTeX_Size1}.katex .op-symbol.large-op{font-family:KaTeX_Size2}.katex .accent>.vlist-t,.katex .op-limits>.vlist-t{text-align:center}.katex .accent .accent-body{position:relative}.katex .accent .accent-body:not(.accent-full){width:0}.katex .overlay{display:block}.katex .mtable .vertical-separator{min-width:1px;display:inline-block}.katex .mtable .arraycolsep{display:inline-block}.katex .mtable .col-align-c>.vlist-t{text-align:center}.katex .mtable .col-align-l>.vlist-t{text-align:left}.katex .mtable .col-align-r>.vlist-t{text-align:right}.katex .svg-align{text-align:left}.katex svg{fill:currentColor;stroke:currentColor;height:inherit;width:100%;display:block;position:absolute}.katex svg path{stroke:none}.katex svg{fill-rule:nonzero;fill-opacity:1;stroke-width:1px;stroke-linecap:butt;stroke-linejoin:miter;stroke-miterlimit:4;stroke-dasharray:none;stroke-dashoffset:0;stroke-opacity:1}.katex img{border-style:none;min-width:0;max-width:none;min-height:0;max-height:none}.katex .stretchy{width:100%;display:block;position:relative;overflow:hidden}.katex .stretchy:after,.katex .stretchy:before{content:""}.katex .hide-tail{width:100%;position:relative;overflow:hidden}.katex .halfarrow-left{width:50.2%;position:absolute;left:0;overflow:hidden}.katex .halfarrow-right{width:50.2%;position:absolute;right:0;overflow:hidden}.katex .brace-left{width:25.1%;position:absolute;left:0;overflow:hidden}.katex .brace-center{width:50%;position:absolute;left:25%;overflow:hidden}.katex .brace-right{width:25.1%;position:absolute;right:0;overflow:hidden}.katex .x-arrow-pad{padding:0 .5em}.katex .cd-arrow-pad{padding:0 .55556em 0 .27778em}.katex .mover,.katex .munder,.katex .x-arrow{text-align:center}.katex .boxpad{padding:0 .3em}.katex .fbox,.katex .fcolorbox{box-sizing:border-box;border:.04em solid}.katex .cancel-pad{padding:0 .2em}.katex .cancel-lap{margin-left:-.2em;margin-right:-.2em}.katex .sout{border-bottom-style:solid;border-bottom-width:.08em}.katex .angl{box-sizing:border-box;border-top:.049em solid;border-right:.049em solid;margin-right:.03889em}.katex .anglpad{padding:0 .03889em}.katex .eqn-num:before{content:"(" counter(katexEqnNo) ")";counter-increment:katexEqnNo}.katex .mml-eqn-num:before{content:"(" counter(mmlEqnNo) ")";counter-increment:mmlEqnNo}.katex .mtr-glue{width:50%}.katex .cd-vert-arrow{display:inline-block;position:relative}.katex .cd-label-left{text-align:left;display:inline-block;position:absolute;right:calc(50% + .3em)}.katex .cd-label-right{text-align:right;display:inline-block;position:absolute;left:calc(50% + .3em)}.katex-display{text-align:center;margin:1em 0;display:block}.katex-display>.katex{text-align:center;white-space:nowrap;display:block}.katex-display>.katex>.katex-html{display:block;position:relative}.katex-display>.katex>.katex-html>.tag{position:absolute;right:0}.katex-display.leqno>.katex>.katex-html>.tag{left:0;right:auto}.katex-display.fleqn>.katex{text-align:left;padding-left:2em}body{counter-reset:katexEqnNo mmlEqnNo}:root{--bg:#faf9f5;--bg-elev:#fff;--bg-soft:#f1f0eb;--bg-2:#fff;--text:#1b1a17;--text-1:#1b1a17;--text-2:#4a463f;--text-3:#6b6862;--text-muted:#6b6862;--text-subtle:#9a968e;--text-soft:#a39e94;--text-faint:#bdb9b0;--chip-bg:#f0efea;--accent:#660874;--accent-dark:#4a0652;--accent-bright:#8a1fa4;--accent-soft:#f2e7f4;--accent-bg:#66087414;--accent-on-dark:#c79ad4;--accent-purple-soft:#9a7bb0;--icon-btn-bg:#efe9e0;--boost-bg:#f6ecf8;--boost-title:#5a1a68;--blockquote-ink:#5a1a68;--green:#660874;--green-bg:var(--accent-soft);--red:#b5564e;--red-bg:#f6e3e2;--red-bright:#dc2626;--admin-danger-bg:var(--red)}@supports (color:color-mix(in lab, red, red)){:root{--admin-danger-bg:color-mix(in srgb, var(--red) 14%, white)}}:root{--admin-danger-border:var(--red)}@supports (color:color-mix(in lab, red, red)){:root{--admin-danger-border:color-mix(in srgb, var(--red) 32%, white)}}:root{--admin-danger-border-strong:var(--red)}@supports (color:color-mix(in lab, red, red)){:root{--admin-danger-border-strong:color-mix(in srgb, var(--red) 45%, white)}}:root{--blue:#5e7891;--wechat:#3a7a4a;--border:#00000012;--border-soft:#0000000b;--border-strong:#0000001f;--border-bold:#00000038;--ink-block:#1f1320;--ink-block-accent:#c79ad4;--ink-block-fg:#f3e9f5;--scrim:#16101857;--tip-bg:#f7eed8;--tip-border:#e3d0a8;--tip-accent:#b07b3e;--tip-bg-think:#faf6ec;--tip-accent-dark:#9c6b22;--tip-title:#7a5316;--warn-bg:#f6e3e2;--warn-border:#ecc9c6;--rv-ans-ink:var(--accent);--rv-ans-bg:var(--accent-soft);--rv-ans-border:var(--accent-soft);--rv-exp-ink:var(--tip-accent);--rv-exp-bg:var(--tip-bg);--rv-exp-border:var(--tip-border);--rv-eye-ink:var(--accent-dark);--rv-eye-bg:var(--accent-soft);--rv-eye-border:var(--accent-soft);--rv-hint-ink:var(--tip-accent);--rv-hint-bg:var(--tip-bg);--rv-hint-border:var(--tip-border);--sans:"Noto Sans SC", -apple-system, BlinkMacSystemFont, system-ui, sans-serif;--mono:"SF Mono", ui-monospace, monospace;--radius-sm:10px;--radius-md:16px;--radius-lg:20px;--radius-xl:22px;--radius-chip:18px;--radius-btn:13px;--radius-pill:9999px;--shadow-sm:0 1px 2px #0000000a;--shadow-md:0 4px 14px #0000000a;--shadow-lg:0 8px 26px #0000000b;--shadow-accent:0 10px 26px #66087442;--shadow-accent-soft:0 10px 26px #66087442;--shadow-accent-mark:0 10px 28px #66087447;--shadow-tip:0 22px 70px #0003;--text-dim:#b0aca3;--text-strike:#b8b4aa;--text-ink:#3a3833;--chevron:#c0bcb3;--accent-purple-light:#a98fb6;--accent-unit:#9a7baa;--text-on-accent:#fff;--accent-border:#66087447;--subject-chinese:#b0654a;--subject-math:#445f4b;--subject-english:#6e8b66;--subject-physics:#5e7891;--subject-chemistry:#4e807b;--subject-biology:#5e8c6a;--subject-history:#9a6a4f;--subject-geography:#b5564f;--subject-politics:#7a6a9c;--subject-method:#6b7280;--subject-fallback:#8a8276;--header-h:54px;--safe-t:env(safe-area-inset-top,0px);--safe-b:env(safe-area-inset-bottom,0px);--safe-l:env(safe-area-inset-left,0px);--safe-r:env(safe-area-inset-right,0px)}[data-subject] :is(.home-subject-dot,.subj-dot,.sg-dot,.nav-subject-dot){background:var(--subject-fallback)}[data-subject=chinese] :is(.home-subject-dot,.subj-dot,.sg-dot,.nav-subject-dot){background:var(--subject-chinese)}[data-subject=math] :is(.home-subject-dot,.subj-dot,.sg-dot,.nav-subject-dot){background:var(--subject-math)}[data-subject=english] :is(.home-subject-dot,.subj-dot,.sg-dot,.nav-subject-dot){background:var(--subject-english)}[data-subject=physics] :is(.home-subject-dot,.subj-dot,.sg-dot,.nav-subject-dot){background:var(--subject-physics)}[data-subject=chemistry] :is(.home-subject-dot,.subj-dot,.sg-dot,.nav-subject-dot){background:var(--subject-chemistry)}[data-subject=biology] :is(.home-subject-dot,.subj-dot,.sg-dot,.nav-subject-dot){background:var(--subject-biology)}[data-subject=history] :is(.home-subject-dot,.subj-dot,.sg-dot,.nav-subject-dot){background:var(--subject-history)}[data-subject=geography] :is(.home-subject-dot,.subj-dot,.sg-dot,.nav-subject-dot){background:var(--subject-geography)}[data-subject=politics] :is(.home-subject-dot,.subj-dot,.sg-dot,.nav-subject-dot){background:var(--subject-politics)}[data-subject=method] :is(.home-subject-dot,.subj-dot,.sg-dot,.nav-subject-dot){background:var(--subject-method)}*,:before,:after{box-sizing:border-box}html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;scroll-padding-top:calc(var(--header-h) + var(--safe-t) + 16px)}html,body{margin:0;padding:0;overflow-x:hidden}body{background:var(--bg);color:var(--text);font-family:var(--sans);letter-spacing:0;-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale;font-feature-settings:"kern", "liga", "calt";padding-top:calc(var(--header-h) + var(--safe-t));font-size:15px;line-height:1.75}button{cursor:pointer;color:inherit;-webkit-tap-highlight-color:transparent;touch-action:manipulation;background:0 0;border:none;padding:0;font-family:inherit}a{color:inherit;-webkit-tap-highlight-color:transparent;text-decoration:none}.header{height:calc(var(--header-h) + var(--safe-t));padding-top:var(--safe-t);-webkit-backdrop-filter:saturate(180%)blur(8px);border-bottom:1px solid var(--border-soft);padding-left:max(14px, var(--safe-l));padding-right:max(14px, var(--safe-r));z-index:50;background:#faf9f5f0;align-items:center;gap:10px;display:flex;position:fixed;top:0;left:0;right:0}.header-btn{width:44px;height:44px;color:var(--text-2);border-radius:10px;flex-shrink:0;place-items:center;transition:background .14s,color .14s;display:grid}.header-btn:hover,.header-btn:active{background:var(--bg-soft);color:var(--text)}.header-nav-btn{width:44px;height:44px;color:var(--text-muted);border-radius:9px;flex-shrink:0;place-items:center;transition:background .14s,color .14s;display:grid}.header-nav-btn:hover,.header-nav-btn:active{background:var(--bg-soft);color:var(--text)}.header-btn svg,.header-nav-btn svg{stroke:currentColor;fill:none;stroke-width:1.9px;stroke-linecap:round;stroke-linejoin:round;width:22px;height:22px}.header-title{min-width:0;font-family:var(--sans);color:var(--text);letter-spacing:-.005em;text-overflow:ellipsis;white-space:nowrap;text-align:center;flex:1;margin:0;padding:0 4px;font-size:16px;font-weight:600;overflow:hidden}.header-title b{font-weight:600}.header-title .sep{color:var(--text-subtle);margin:0 8px;font-weight:400}.toc-btn{background:var(--bg-elev);border:1px solid var(--border-soft);height:44px;min-height:44px;color:var(--text-2);border-radius:10px;flex-shrink:0;align-items:center;gap:7px;padding:0 14px;font-size:13.5px;font-weight:500;transition:background .14s,color .14s,border-color .14s;animation:.2s toc-btn-in;display:inline-flex}.toc-btn:hover,.toc-btn:active{background:var(--accent-bg);color:var(--accent-dark);border-color:var(--accent-soft)}.toc-btn svg{width:16px;height:16px}.toc-btn.hidden{display:none}@keyframes toc-btn-in{0%{opacity:0;transform:translateY(-4px)}to{opacity:1;transform:translateY(0)}}@media (prefers-reduced-motion:reduce){.toc-btn{animation:none}}.main{width:100%;max-width:480px;margin:0 auto;padding:24px 20px 120px}@media (width>=720px){.main{max-width:480px;padding-left:22px;padding-right:22px}}.breadcrumb{color:var(--text-soft);letter-spacing:.03em;margin:4px 0 14px;font-size:12px;line-height:1.5}.breadcrumb span+span:before{content:"·";color:var(--text-subtle);margin:0 8px}.article h1{font-family:var(--sans);letter-spacing:-.01em;color:var(--text);overflow-wrap:anywhere;margin:8px 0 0;font-size:clamp(26px,6vw,29px);font-weight:700;line-height:1.2}.article .lead{font-family:var(--sans);color:var(--text-2);letter-spacing:-.003em;margin:12px 0 0;font-size:15px;font-weight:400;line-height:1.7}.article h2{font-family:var(--sans);letter-spacing:-.005em;color:var(--text);scroll-margin-top:calc(var(--header-h) + var(--safe-t) + 12px);border-top:none;margin:0 0 14px;padding-top:0;font-size:18px;font-weight:700;line-height:1.3}.article h3{font-family:var(--sans);color:var(--text);margin:16px 0 8px;font-size:15px;font-weight:700}.article p{color:var(--text-2);overflow-wrap:break-word;margin:0 0 10px;font-size:13.5px;line-height:1.7}.article strong{color:var(--text);font-weight:700}.article-foot{color:var(--text-muted);margin-top:32px;font-size:13px}.article em{color:var(--text-2);font-style:italic}.article a:not(.header-btn):not(.toc-btn):not(.kp-link):not(.boostlock-cta){color:var(--accent-dark);border-bottom:1px solid var(--accent-soft);padding-bottom:1px}.article ul,.article ol{color:var(--text-2);margin:0 0 12px;padding-left:20px}.article li{margin:6px 0;font-size:13.5px;line-height:1.7}.article li::marker{color:var(--text-subtle)}.article ol{counter-reset:ol-counter;padding-left:0;list-style:none}.article ol>li{counter-increment:ol-counter;padding-left:36px;position:relative}.article ol>li:before{content:counter(ol-counter);background:var(--accent-soft);width:26px;height:26px;color:var(--accent);font-size:13px;font-weight:700;font-family:var(--sans);border-radius:50%;justify-content:center;align-items:center;display:flex;position:absolute;top:2px;left:0}.article blockquote{background:var(--accent-soft);font-family:var(--sans);color:var(--blockquote-ink);font-variation-settings:"opsz" 20;border:none;border-radius:12px;margin:28px 0;padding:12px 14px;font-size:13.5px;line-height:1.65}.article blockquote p{color:var(--blockquote-ink);font-family:var(--sans);font-size:inherit;margin:0}.article blockquote p+p{margin-top:12px}.article code{font-family:var(--mono);background:var(--bg-soft);color:var(--accent-dark);border-radius:4px;padding:2px 6px;font-size:.88em}.article pre{background:var(--bg-elev);border:1px solid var(--border-soft);color:var(--text-2);-webkit-overflow-scrolling:touch;border-radius:9px;margin:22px 0;padding:16px 18px;font-size:13.5px;line-height:1.7;overflow-x:auto}.article pre code{font-size:inherit;color:inherit;background:0 0;padding:0}.article .katex{color:var(--text);font-size:1.04em}.article .katex-display{-webkit-overflow-scrolling:touch;margin:20px 0;overflow:auto hidden}.article p,.article li,.article td,.article th,.article blockquote{overflow-wrap:anywhere;word-break:break-word}@media (width<=520px){.article .katex-display{font-size:.9em}}.article .katex-display::-webkit-scrollbar{height:3px}.article .table-wrap::-webkit-scrollbar{height:3px}.article pre::-webkit-scrollbar{height:3px}.article .katex-display::-webkit-scrollbar-thumb{background:var(--border);border-radius:3px}.article .table-wrap::-webkit-scrollbar-thumb{background:var(--border);border-radius:3px}.article pre::-webkit-scrollbar-thumb{background:var(--border);border-radius:3px}.chap-name .chap-grade{color:var(--text-2,#999);opacity:.75;margin-right:6px;font-size:12px;font-weight:400}.dc-mistake-source{color:var(--text-2,#888);margin-bottom:8px;font-size:13px;display:block}.dc-mistake-preview{color:var(--text);max-height:6em;font-size:14px;line-height:1.6;overflow:hidden;-webkit-mask-image:linear-gradient(#000 70%,#0000);mask-image:linear-gradient(#000 70%,#0000)}.dc-mistake-preview p{margin:0 0 4px}.dc-mistake-preview strong{color:var(--accent)}.toast-stack{z-index:9999;pointer-events:none;padding-top:env(safe-area-inset-top);flex-direction:column;align-items:flex-end;gap:8px;display:flex;position:fixed;top:16px;left:16px;right:16px}.toast{background:var(--text);color:var(--text-on-accent);font-family:var(--sans);pointer-events:auto;cursor:pointer;overflow-wrap:anywhere;border-radius:10px;align-items:flex-start;gap:8px;max-width:min(360px,100%);padding:10px 14px;font-size:14px;line-height:1.5;animation:.22s toast-in;display:flex;box-shadow:0 4px 16px #0000002e}.toast-icon{flex-shrink:0;justify-content:center;align-items:center;width:18px;height:18px;margin-top:1px;display:flex}.toast-icon .dk-icon{width:18px;height:18px}.toast-msg{flex:1;min-width:0}.toast-info{background:var(--text)}.toast-success{background:var(--green)}.toast-warning{background:var(--tip-accent)}.toast-error{background:var(--red)}@keyframes toast-in{0%{opacity:0;transform:translateY(-8px)}to{opacity:1;transform:translateY(0)}}@media (prefers-reduced-motion:reduce){.toast{animation:none}}.skeleton-article,.skeleton-list{padding:12px 0}.sk-line,.sk-block,.sk-card,.sk-row{background:linear-gradient(90deg, var(--border-soft,#ecebe7) 0%, #0000000a 50%, var(--border-soft,#ecebe7) 100%);background-size:200% 100%;border-radius:6px;animation:1.4s linear infinite sk-shimmer}.sk-line{width:100%;height:14px;margin:8px 0}.sk-line.sk-short{width:60%}.sk-line.sk-h1{width:55%;height:32px;margin:8px 0 16px}.sk-line.sk-h2{width:38%;height:22px;margin:22px 0 12px}.sk-line.sk-h3{width:45%;height:18px;margin:8px 0 6px}.sk-line.sk-meta{width:30%;height:13px;margin-bottom:24px}.sk-block{border-radius:10px;height:80px;margin:16px 0}.sk-card{border-radius:10px;height:96px}.sk-row{background:var(--bg-elev,#fff);border-radius:10px;height:auto;margin:10px 0;padding:14px 16px;animation:none}.sk-row .sk-line{margin:6px 0}@keyframes sk-shimmer{0%{background-position:200% 0}to{background-position:-200% 0}}.offline-banner{z-index:9998;background:var(--red);padding:8px 16px;position:fixed;top:0;left:0;right:0}@supports (color:color-mix(in lab, red, red)){.offline-banner{background:color-mix(in srgb, var(--red) 96%, transparent)}}.offline-banner{color:var(--text-on-accent);text-align:center;font-size:13px;line-height:1.5;box-shadow:0 2px 6px #0000001f}.reader-scroll-progress{top:calc(var(--header-h) + var(--safe-t) - 1px);background:var(--border);z-index:60;pointer-events:none;height:3px;position:fixed;left:0;right:0}.reader-scroll-bar{background:var(--accent);height:100%;transition:width .4s}.reader-watermark{right:max(14px, env(safe-area-inset-right));bottom:max(14px, env(safe-area-inset-bottom));z-index:20;pointer-events:none;color:#3c3c432e;font-family:var(--mono);letter-spacing:.06em;-webkit-user-select:none;user-select:none;font-size:11px;position:fixed;transform:rotate(-8deg)}.kp-section{background:var(--bg-elev);border:1px solid var(--border);box-shadow:var(--shadow-sm);border-radius:18px;margin-top:14px;padding:16px 16px 18px}.kp-section:first-of-type{margin-top:18px}.kp-section .h2-marks{margin-bottom:4px}.kp-section>h2{margin-top:0}.kp-section .card-fold{margin-top:12px}.kp-intro-card{background:var(--bg-elev);border:1px solid var(--border);box-shadow:var(--shadow-sm);border-radius:18px;margin-top:14px;padding:16px 16px 18px}.kp-intro-card>p:first-child{margin-top:0}.kp-intro-card>:last-child{margin-bottom:0}.kp-intro-card .katex{color:var(--text)}.search-history{margin-top:14px}.search-history-head{color:var(--text-muted,#888);justify-content:space-between;align-items:center;margin-bottom:10px;font-size:12.5px;display:flex}.search-history-clear{cursor:pointer;color:var(--text-subtle,#999);background:0 0;border:none;border-radius:6px;min-height:36px;padding:6px 10px;font-size:12px}.search-history-clear:hover{color:var(--accent)}.search-history-list{flex-wrap:wrap;gap:8px;display:flex}.search-history-item{background:var(--bg-elev,#fff);border:1px solid var(--border-soft,#ecebe7);border-radius:999px;align-items:center;padding:0;display:inline-flex;overflow:hidden}.search-history-text{color:var(--text);cursor:pointer;background:0 0;border:none;padding:6px 10px 6px 14px;font-size:13.5px}.search-history-text:hover{color:var(--accent)}.search-history-del{color:var(--text-subtle,#aaa);cursor:pointer;background:0 0;border:none;padding:6px 10px 6px 4px;font-size:16px;line-height:1}.search-history-del:hover{color:var(--accent)}.streak-badge{background:linear-gradient(95deg, var(--accent-dark) 0%, var(--accent) 100%);color:var(--text-on-accent);border-radius:999px;margin:12px 0 8px;padding:6px 14px;font-size:13.5px;display:inline-block;box-shadow:0 2px 6px #6608742e}.streak-badge strong{font-weight:700}.subject-grid{gap:10px;margin-bottom:12px;display:grid}.subject-row{grid-template-columns:60px 1fr 70px;align-items:center;gap:12px;font-size:14px;display:grid}.subject-name{color:var(--text);font-weight:600}.subject-bar{background:var(--bg-soft,#eee);border-radius:999px;height:6px;overflow:hidden}.subject-bar-fill{background:linear-gradient(90deg, var(--accent) 0%, var(--accent-dark) 100%);height:100%;transition:width .4s}.subject-count{color:var(--text-2,#888);text-align:right;font-variant-numeric:tabular-nums;font-size:13px}.subject-count-sep{opacity:.5;margin:0 2px}.heatmap{gap:4px;margin:8px 0 24px;padding:4px 0;display:flex;overflow-x:auto}.heatmap-col{flex-direction:column;gap:4px;display:flex}.heatmap-cell{background:var(--bg-soft,#eee);border-radius:3px;width:14px;height:14px}.heatmap-cell.level-0{background:#0000000d}.heatmap-cell.level-1{background:#66087440}.heatmap-cell.level-2{background:#66087480}.heatmap-cell.level-3{background:#660874bf}.heatmap-cell.level-4{background:var(--accent)}.stats-head{justify-content:space-between;align-items:flex-start;gap:12px;display:flex}.stats-export{border:1.5px solid var(--accent-border);color:var(--accent);cursor:pointer;background:0 0;border-radius:11px;align-self:center;padding:7px 14px;font-size:13px;font-weight:600;transition:background .15s}.stats-export:hover:not(:disabled){border-color:var(--accent);color:var(--accent)}.stats-export:disabled{opacity:.5;cursor:not-allowed}.kp-chapter-context{background:var(--bg-elev,#fff);border-left:3px solid var(--accent);color:var(--text-2,#888);border-radius:0 8px 8px 0;flex-wrap:wrap;align-items:center;gap:12px;margin:32px 0 12px;padding:12px 14px;font-size:13px;display:flex}.kp-chapter-context .kp-position{color:var(--accent);margin-left:auto;font-weight:600}.plans-order-status{background:var(--bg-elev);border:1px solid var(--border);border-radius:var(--radius-md);box-shadow:var(--shadow-sm);justify-content:space-between;align-items:center;gap:14px;margin:20px 0 24px;padding:16px;display:flex}.plans-order-info{flex:1;min-width:0}.plans-order-title{color:var(--accent-dark);margin-bottom:3px;font-size:14.5px;font-weight:600}.plans-order-meta{color:var(--text-muted);font-size:12.5px;line-height:1.5}.plans-order-actions{flex-shrink:0;align-items:center;gap:8px;display:flex}.plans-order-btn{border:1px solid var(--accent);background:var(--accent);color:var(--text-on-accent);cursor:pointer;border-radius:8px;padding:8px 12px;font-size:13px;font-weight:500;transition:opacity .14s}.plans-order-btn:disabled{opacity:.55;cursor:not-allowed}.plans-order-close{color:var(--text-muted);cursor:pointer;background:0 0;border:none;border-radius:6px;padding:4px 6px;font-size:15px;line-height:1;transition:background .14s,color .14s}.plans-order-close:hover{color:var(--text);background:#0000000f}.plans-features{grid-template-columns:repeat(auto-fill,minmax(220px,1fr));gap:14px;margin:24px 0;display:grid}.plans-feature{background:var(--bg-elev);border:1px solid var(--border);border-radius:16px;align-items:flex-start;gap:14px;padding:16px;display:flex;box-shadow:0 1px 2px #00000008}.plans-feature-icon{background:var(--accent-soft);width:38px;height:38px;color:var(--accent);border-radius:11px;flex-shrink:0;justify-content:center;align-items:center;display:flex}.plans-feature-icon .dk-icon{width:20px;height:20px}.plans-feature-text{flex:1}.plans-feature-title{color:var(--text);font-size:15.5px;font-weight:700}.plans-feature-desc{color:var(--text-subtle);margin-top:4px;font-size:12.5px;line-height:1.55}.plans-faq{background:var(--bg-elev);border:1px solid var(--border);border-radius:var(--radius-md);box-shadow:var(--shadow-sm);margin-top:32px;padding:16px}.plans-faq h2{letter-spacing:.06em;color:var(--text-soft);margin:0 0 12px;font-size:12px;font-weight:700}.plans-faq-item{border-bottom:1px solid var(--border-soft);background:0 0;padding:12px 0;font-size:14px}.plans-faq-item:last-child{border-bottom:none}.plans-faq-item summary{cursor:pointer;outline:none;justify-content:space-between;align-items:center;gap:12px;font-weight:500;list-style:none;display:flex}.plans-faq-item summary::-webkit-details-marker{display:none}.plans-faq-item summary::marker{content:""}.plans-faq-chevron{color:var(--text-muted);flex-shrink:0;align-items:center;transition:transform .18s;display:flex}.plans-faq-chevron .dk-icon{width:18px;height:18px}.plans-faq-item[open] .plans-faq-chevron{transform:rotate(180deg)}.plans-faq-answer{color:var(--text-muted);padding-top:10px;line-height:1.7}@media (prefers-reduced-motion:reduce){.plans-faq-chevron{transition:none}}.skip-link{background:var(--accent);color:var(--text-on-accent);z-index:10000;border-radius:6px;padding:8px 14px;font-size:14px;text-decoration:none;transition:top .18s;position:absolute;top:-100px;left:16px}.skip-link:focus{top:calc(8px + var(--safe-t,0px))}button:focus-visible,a:focus-visible{outline:2px solid var(--accent-bright);outline-offset:2px}input:focus-visible,textarea:focus-visible{outline:2px solid var(--accent-bright);outline-offset:1px}.article hr{border:none;border-top:1px solid var(--border-soft);margin:44px 0}.article .table-wrap{-webkit-overflow-scrolling:touch;border-radius:9px;margin:22px 0;overflow-x:auto}.article table{border-collapse:collapse;width:100%;font-size:15px}.article th,.article td{border-bottom:1px solid var(--border-soft);text-align:left;white-space:normal;word-break:break-word;overflow-wrap:anywhere;vertical-align:top;padding:9px 12px}.article th{color:var(--text);letter-spacing:.01em;border-bottom:1px solid var(--border);background:0 0;font-size:13.5px;font-weight:600}.article td{color:var(--text-muted)}.card-fold .article th,.card-fold th{background:0 0}.article h2.sec-mistake,.article h2.sec-mistake .sec-icon{color:var(--red)}.article h2.sec-example,.article h2.sec-example .sec-icon{color:var(--green)}.article h2.sec-model,.article h2.sec-model .sec-icon{color:var(--blue)}.article h2 .sec-icon{vertical-align:.1em;margin-right:6px;font-size:.78em;display:inline-block}.article h2.sec-path .sec-icon,.article h2.sec-practice .sec-icon{color:var(--text-subtle)}.article h2.markable .h2-marks{float:right;flex:none;gap:5px;margin-top:2px;margin-left:14px;display:inline-flex}.article h2.markable .mark-btn{margin:0}.article h3.markable .h3-marks{float:right;flex:none;gap:4px;margin-top:2px;margin-left:10px;display:inline-flex}.article h3.markable .mark-btn{margin:0}.mark-btn{border:1px solid var(--border-strong);cursor:pointer;width:auto;min-width:auto;height:auto;color:var(--text-muted);-webkit-tap-highlight-color:transparent;background:0 0;border-radius:8px;justify-content:center;align-items:center;padding:4px 8px;font-size:11px;font-weight:600;transition:all .15s;display:inline-flex}.mark-btn:focus-visible{box-shadow:0 0 0 3px var(--accent)}@supports (color:color-mix(in lab, red, red)){.mark-btn:focus-visible{box-shadow:0 0 0 3px color-mix(in srgb, var(--accent) 18%, transparent)}}.mark-btn:focus-visible{outline:none}.dontknow-btn.active{border-color:var(--red);background:var(--red);color:var(--text-on-accent)}.confused-btn.active{border-color:var(--tip-accent);background:var(--tip-accent);color:var(--text-on-accent)}.done-btn.active{border-color:var(--accent);background:var(--accent);color:var(--text-on-accent)}.dontknow-btn:hover:not(.active){border-color:var(--red);color:var(--red)}.confused-btn:hover:not(.active){border-color:var(--tip-accent);color:var(--tip-accent)}.done-btn:hover:not(.active){border-color:var(--accent);color:var(--accent)}.toc-card a.confused{color:var(--tip-accent)}.toc-card a.dontknow{color:var(--red)}.toc-card a.confused:after{content:"?";margin-left:auto;font-size:12px;font-weight:700}.toc-card a.dontknow:after{content:"✕";margin-left:auto;font-size:12px;font-weight:700}.progress-bar{margin:0 0 28px}.progress-track{background:var(--bg-soft);border-radius:999px;height:5px;margin-bottom:9px;overflow:hidden}.progress-fill{background:var(--accent);border-radius:999px;width:0%;height:100%;transition:width .45s cubic-bezier(.4,.2,.2,1),background .3s}.progress-meta{color:var(--text-muted);justify-content:space-between;align-items:center;gap:12px;font-size:12.5px;display:flex}.progress-meta .stats-text b{color:var(--text);font-weight:600}.progress-meta .reset-btn{color:var(--text-subtle);cursor:pointer;background:0 0;border:none;border-radius:6px;min-height:36px;padding:6px 10px;font-size:11.5px}.progress-meta .reset-btn:hover{color:var(--accent-dark);background:var(--accent-bg)}.progress-bar.complete .progress-fill{background:var(--green)}.progress-bar.complete .stats-text b{color:var(--green)}.progress-bar.complete .stats-text:after{content:"✓ 本节全部学会";color:var(--green);margin-left:8px;font-weight:500}.reader-progress-card{background:var(--bg-elev);border:1px solid var(--border);box-shadow:var(--shadow-sm);border-radius:16px;margin-top:18px;padding:15px 16px}.rpc-head{justify-content:space-between;align-items:center;display:flex}.rpc-reset:hover{color:var(--accent-dark);background:var(--accent-bg)}.reader-progress-card.complete .rpc-fill{background:var(--green)}.reader-progress-card.complete .rpc-stats b{color:var(--green)}.toc-card{background:var(--bg-elev);border:1px solid var(--border-soft);border-radius:var(--radius-lg);box-shadow:var(--shadow-md);margin:0 0 48px;padding:16px 20px 8px}.toc-card-label{letter-spacing:.14em;text-transform:uppercase;color:var(--text-subtle);justify-content:space-between;align-items:center;margin-bottom:4px;font-size:10.5px;font-weight:600;display:flex}.toc-card-label .count{color:var(--text-muted)}.toc-card ol{counter-reset:tocnum;grid-template-columns:1fr;column-gap:28px;margin:0;padding:0;list-style:none;display:grid}@media (width>=720px){.toc-card ol{grid-template-columns:1fr 1fr}}.toc-card li{counter-increment:tocnum;margin:0}.toc-card a{color:var(--text-2);border-bottom:1px solid var(--border-soft);align-items:center;gap:10px;min-height:44px;padding:11px 0;font-size:14.5px;line-height:1.4;transition:color .14s;display:flex}.toc-card a:before{content:counter(tocnum, decimal-leading-zero);font-family:var(--mono);color:var(--text-subtle);letter-spacing:.04em;flex-shrink:0;min-width:22px;font-size:11px}.toc-card a:hover,.toc-card a:active{color:var(--accent-dark)}.toc-card a.done{color:var(--text-subtle)}.toc-card a.done:after{content:"✓";color:var(--accent);margin-left:auto;font-size:12px;font-weight:700}.related-card{background:var(--bg-elev);border:1px solid var(--border-soft);border-radius:var(--radius-lg);box-shadow:var(--shadow-md);margin:64px 0 0;padding:22px 24px 14px}.related-label{letter-spacing:.14em;text-transform:uppercase;color:var(--text-subtle);margin-bottom:14px;font-size:10.5px;font-weight:600}.related-list{grid-template-columns:1fr;gap:10px;display:grid}@media (width>=720px){.related-list{grid-template-columns:1fr 1fr}}.related-item{background:var(--bg);border:1px solid var(--border-soft);border-radius:var(--radius-md);cursor:pointer;min-height:56px;padding:13px 16px;transition:all .16s;display:block}.related-item:hover,.related-item:active{border-color:var(--accent);background:var(--accent-bg)}.related-item-title{font-family:var(--sans);color:var(--text);letter-spacing:-.005em;align-items:baseline;gap:8px;margin-bottom:3px;font-size:15.5px;font-weight:600;display:flex}.related-item-title .arrow{color:var(--text-subtle);font-size:12px;font-family:var(--sans);margin-left:auto}.related-item-desc{color:var(--text-muted);font-size:12.5px;line-height:1.5}.scrim{background:var(--scrim);opacity:0;pointer-events:none;z-index:90;cursor:pointer;transition:opacity .22s;position:fixed;inset:0}.scrim.open{opacity:1;pointer-events:auto}.sheet-scrim{z-index:99}.content-sheet-scrim{z-index:109}.drawer{background:var(--bg);z-index:100;width:min(316px,86vw);height:100dvh;padding:calc(50px + var(--safe-t)) 20px calc(24px + var(--safe-b)) max(20px, var(--safe-l));-webkit-overflow-scrolling:touch;transition:transform .28s cubic-bezier(.32,.72,0,1);position:fixed;top:0;left:0;overflow-y:auto;transform:translate(-100%);box-shadow:10px 0 44px #00000038}.drawer.open{transform:translate(0)}.drawer .brand{cursor:pointer;align-items:center;gap:12px;margin-bottom:24px;transition:opacity .14s;display:flex}.drawer .brand:hover{opacity:.7}.drawer .brand-mark{background:var(--accent);width:42px;height:42px;color:var(--text-on-accent);font-family:var(--sans);border-radius:12px;place-items:center;font-size:20px;font-weight:700;display:grid}.drawer .brand-text{flex-direction:column;gap:1px;min-width:0;display:flex}.drawer .brand-name{font-family:var(--sans);letter-spacing:.02em;color:var(--text);font-size:21px;font-weight:700}.drawer .brand-tagline{color:var(--text-soft);letter-spacing:.12em;margin:0;font-size:10.5px;font-weight:600}.drawer .nav-label{letter-spacing:.08em;color:var(--text-dim);margin:24px 0 6px;padding-left:12px;font-size:12px;font-weight:700}.drawer .nav-item{color:var(--text-2);border-radius:12px;align-items:center;gap:13px;padding:11px 12px;font-size:16px;line-height:1.45;display:flex}.drawer .nav-item:active,.drawer .nav-item:hover{background:var(--bg-soft);color:var(--text)}.drawer .nav-item.active{background:var(--accent-soft);color:var(--accent);border-radius:12px;font-weight:700}.drawer .nav-item.disabled{color:var(--text-subtle);cursor:default}.drawer .nav-item.disabled:hover,.drawer .nav-item.disabled:active{color:var(--text-subtle);background:0 0}.drawer .nav-item .nav-text{flex:1;min-width:0}.drawer .nav-item .nav-dot{border:1.5px solid var(--border);background:0 0;border-radius:50%;flex-shrink:0;width:8px;height:8px;transition:all .16s}.drawer .nav-item .nav-dot.partial{background:var(--accent-soft);border-color:var(--accent-soft)}.drawer .nav-item .nav-dot.done{background:var(--accent);border-color:var(--accent)}.drawer .nav-item.special{color:var(--text);font-weight:500}.drawer .nav-item.special .nav-icon{stroke:currentColor;fill:none;stroke-width:1.8px;stroke-linecap:round;stroke-linejoin:round;flex-shrink:0;width:21px;height:21px}.drawer .nav-badge{background:var(--accent-soft);min-width:22px;height:20px;color:var(--accent-dark);border-radius:11px;flex-shrink:0;justify-content:center;align-items:center;margin-left:auto;padding:0 7px;font-size:11px;font-weight:600;display:none}.drawer .nav-badge.has-count{display:inline-flex}.drawer .file-btn{background:var(--bg-elev);border:1px solid var(--border);min-height:44px;color:var(--text-2);border-radius:9px;align-items:center;gap:6px;margin-top:8px;padding:10px 14px;font-size:13.5px;display:inline-flex}.drawer .file-btn:hover,.drawer .file-btn:active{background:var(--accent-bg);color:var(--accent-dark);border-color:var(--accent)}.sheet{background:var(--bg);border-top:1px solid var(--border-soft);z-index:100;max-height:78dvh;padding:6px max(20px, var(--safe-l)) calc(16px + var(--safe-b)) max(20px, var(--safe-r));border-radius:18px 18px 0 0;flex-direction:column;transition:transform .3s cubic-bezier(.32,.72,0,1);display:flex;position:fixed;bottom:0;left:0;right:0;transform:translateY(100%);box-shadow:0 -16px 48px #00000014}.sheet.open{transform:translateY(0)}.sheet-grabber{background:var(--border);border-radius:2px;width:42px;height:4px;margin:8px auto 10px}.sheet-header{border-bottom:1px solid var(--border-soft);justify-content:space-between;align-items:center;margin-bottom:4px;padding:0 4px 12px;display:flex}.sheet-title{font-family:var(--sans);color:var(--text);letter-spacing:-.005em;font-size:17px;font-weight:600}.sheet-title .count{color:var(--text-subtle);font-size:13px;font-weight:400;font-family:var(--sans);margin-left:8px}.sheet-close{width:44px;height:44px;color:var(--text-muted);border-radius:10px;place-items:center;display:grid}.sheet-close:hover,.sheet-close:active{background:var(--bg-soft);color:var(--text)}.sheet-close svg{stroke:currentColor;fill:none;stroke-width:1.8px;stroke-linecap:round;width:20px;height:20px}.sheet-list{-webkit-overflow-scrolling:touch;counter-reset:sheetnum;flex:1;margin:0;padding:0;list-style:none;overflow-y:auto}.sheet-list li{counter-increment:sheetnum}.sheet-list a{color:var(--text-2);border-bottom:1px solid var(--border-soft);align-items:center;gap:14px;min-height:48px;padding:14px 8px;font-size:16px;line-height:1.4;display:flex}.sheet-list a:before{content:counter(sheetnum, decimal-leading-zero);font-family:var(--mono);color:var(--text-subtle);letter-spacing:.04em;flex-shrink:0;min-width:24px;font-size:11.5px}.sheet-list a:active{background:var(--accent-bg)}.sheet-list a.current{color:var(--accent-dark);font-weight:500}.sheet-list a.current:before{color:var(--accent)}.sheet-list a.done{color:var(--text-subtle)}.sheet-list a.done:after{content:"✓";color:var(--accent);margin-left:auto;font-size:14px;font-weight:700}.content-sheet{background:var(--bg);border-top:1px solid var(--border-soft);z-index:110;border-radius:18px 18px 0 0;flex-direction:column;height:94dvh;transition:transform .34s cubic-bezier(.32,.72,0,1);display:flex;position:fixed;bottom:0;left:0;right:0;overflow:hidden;transform:translateY(100%);box-shadow:0 -20px 60px #00000024}.content-sheet.open{transform:translateY(0)}.content-sheet-handle{padding:14px max(14px, var(--safe-r)) 12px max(14px, var(--safe-l));border-bottom:1px solid var(--border-soft);-webkit-backdrop-filter:saturate(180%)blur(20px);background:#f8f9fad9;flex-shrink:0;align-items:center;gap:8px;display:flex;position:relative}.content-sheet-handle:before{content:"";background:var(--border);border-radius:2px;width:42px;height:4px;position:absolute;top:6px;left:50%;transform:translate(-50%)}.content-sheet-back,.content-sheet-close{width:44px;height:44px;color:var(--text-2);border-radius:10px;flex-shrink:0;place-items:center;display:grid}.content-sheet-back:hover,.content-sheet-back:active,.content-sheet-close:hover,.content-sheet-close:active{background:var(--bg-soft);color:var(--text)}.content-sheet-back svg,.content-sheet-close svg{stroke:currentColor;fill:none;stroke-width:1.8px;stroke-linecap:round;stroke-linejoin:round;width:20px;height:20px}.content-sheet-back.hidden{visibility:hidden}.content-sheet-title{font-family:var(--sans);color:var(--text);text-align:center;letter-spacing:-.005em;text-overflow:ellipsis;white-space:nowrap;flex:1;padding:0 8px;font-size:15.5px;font-weight:600;overflow:hidden}.content-sheet-body{-webkit-overflow-scrolling:touch;padding:28px clamp(20px, 5vw, 56px) calc(80px + var(--safe-b));flex:1;overflow-y:auto}.content-sheet-body .article{max-width:720px;margin:0 auto}.stats{max-width:760px;margin:0 auto}.stats h1{font-family:var(--sans);letter-spacing:-.01em;margin:0;font-size:27px;font-weight:700}.stats .stats-sub{font-family:var(--sans);color:var(--text-subtle);margin:6px 0 0;font-size:13px;line-height:1.6}.stats h2{font-family:var(--sans);letter-spacing:.06em;color:var(--text-soft);text-transform:none;margin:24px 2px 9px;font-size:12px;font-weight:700}.stats-section{background:var(--bg-elev);border:1px solid var(--border);border-radius:var(--radius-md);box-shadow:var(--shadow-sm);padding:16px}.stats-grid{grid-template-columns:1fr 1fr;gap:10px;display:grid}@media (width>=720px){.stats-grid{grid-template-columns:repeat(4,1fr)}}.stat-card{background:var(--bg-elev);border:1px solid var(--border);border-radius:16px;padding:15px 14px;transition:transform .16s,box-shadow .16s}.stat-card:hover{box-shadow:var(--shadow-lg);transform:translateY(-2px)}.stat-card .stat-label{letter-spacing:0;text-transform:none;color:var(--text-subtle);margin-bottom:6px;font-size:12px;font-weight:600}.stat-card .stat-value{font-family:var(--sans);color:var(--text);letter-spacing:-.01em;font-size:26px;font-weight:700;line-height:1.1}.stat-card .stat-value .stat-total{color:var(--text-soft);margin-left:3px;font-size:13px;font-weight:400}.stat-card.accent .stat-value .stat-total{color:var(--accent-unit)}.stat-card .stat-note{color:var(--text-soft);margin-top:6px;font-size:11px;line-height:1.5}.stat-card.accent{background:var(--accent-soft);border:none;border-radius:16px}.stat-card.accent .stat-value,.stat-card.accent .stat-label{color:var(--accent)}.stat-card.accent .stat-note{color:var(--accent-unit)}.stats-grid-3{grid-template-columns:repeat(3,1fr)}.sg-subject{margin-bottom:20px}.sg-subject-head{align-items:center;gap:10px;margin:0 0 6px;display:flex}.sg-dot{border-radius:50%;flex-shrink:0;width:9px;height:9px}.sg-subject-name{font-family:var(--sans);color:var(--text);letter-spacing:-.008em;font-size:16.5px;font-weight:600}.sg-grade{border-bottom:1px solid var(--border-soft);align-items:center;gap:12px;padding:10px 0 10px 19px;display:flex}.sg-grade:last-child{border-bottom:none}.sg-grade-name{min-width:0;color:var(--text-2);flex:1;font-size:14.5px}.sg-bar{background:var(--bg-soft);border-radius:999px;flex-shrink:0;width:96px;height:5px;overflow:hidden}.sg-bar-fill{background:var(--accent);border-radius:999px;height:100%;transition:width .4s;display:block}.sg-count{color:var(--text-muted);font-variant-numeric:tabular-nums;text-align:right;min-width:46px;font-size:13px}.sg-sep{opacity:.5;margin:0 2px}.sg-grade.locked .sg-grade-name{color:var(--text-subtle)}.sg-unlock{color:var(--accent-dark);background:var(--accent-bg);border:1px solid var(--accent-soft);border-radius:8px;flex-shrink:0;align-items:center;gap:5px;padding:5px 11px;font-size:12.5px;font-weight:600;display:inline-flex}.sg-unlock:hover,.sg-unlock:active{background:var(--accent);color:var(--text-on-accent);border-color:var(--accent)}.bar-chart{align-items:flex-end;gap:8px;height:130px;padding:0;display:flex}@media (width>=720px){.bar-chart{gap:12px;height:160px}}.bar-day{flex-direction:column;flex:1;align-items:center;gap:8px;min-width:0;height:100%;display:flex}.bar-day .bar-track{flex:1;align-items:flex-end;width:100%;display:flex}.bar-day .bar-fill{background:var(--accent-soft);border-radius:4px 4px 0 0;width:100%;min-height:2px;transition:height .4s cubic-bezier(.4,.2,.2,1);position:relative}.bar-day .bar-fill.today{background:var(--accent)}.bar-day .bar-fill .bar-count{color:var(--text);font-size:11px;font-weight:600;font-family:var(--mono);position:absolute;top:-18px;left:50%;transform:translate(-50%)}.bar-day .bar-label{color:var(--text-subtle);font-size:10.5px;font-family:var(--mono);letter-spacing:.04em}.bar-day .bar-label.today{color:var(--accent-dark);font-weight:600}.day-list{margin:0;padding:0;list-style:none}.day-group{margin-bottom:32px}.day-group-header{font-family:var(--sans);color:var(--text);border-bottom:1px solid var(--border-soft);align-items:baseline;gap:12px;margin-bottom:12px;padding-bottom:10px;font-size:18px;font-weight:600;display:flex}.day-group-header .relative{color:var(--accent-dark);font-size:13px;font-weight:500;font-family:var(--sans)}.day-group-header .day-count{color:var(--text-muted);font-size:12.5px;font-weight:400;font-family:var(--sans);margin-left:auto}.day-entry{color:var(--text-2);align-items:baseline;gap:12px;padding:9px 0;font-size:14.5px;line-height:1.5;display:flex}.day-entry .day-time{font-family:var(--mono);color:var(--text-subtle);flex-shrink:0;min-width:44px;font-size:12px}.day-entry .day-kp{color:var(--text);font-weight:500}.day-entry .day-sec{color:var(--text-muted)}.empty-state{text-align:center;color:var(--text-muted);font-family:var(--sans);padding:48px 20px;font-size:16px;line-height:1.6}.empty-state .empty-icon{color:var(--text-subtle);margin-bottom:14px;font-size:32px}.dk-error-boundary{min-height:100dvh;padding:calc(2.5rem + env(safe-area-inset-top)) calc(1.5rem + env(safe-area-inset-right)) calc(2.5rem + env(safe-area-inset-bottom)) calc(1.5rem + env(safe-area-inset-left));text-align:center;font-family:var(--sans);background:var(--bg);color:var(--text);flex-direction:column;justify-content:center;align-items:center;display:flex}.dk-error-icon{background:var(--warn-bg);width:56px;height:56px;color:var(--red);border-radius:50%;flex-shrink:0;justify-content:center;align-items:center;margin-bottom:1rem;font-size:28px;display:flex}.dk-error-icon .dk-icon{width:28px;height:28px}.dk-error-title{color:var(--text);margin:0 0 .5rem;font-size:1.25rem;font-weight:600}.dk-error-desc{color:var(--text-muted);max-width:420px;margin:0 0 1.5rem;font-size:.95rem;line-height:1.6}.dk-error-actions{flex-wrap:wrap;justify-content:center;gap:.5rem;margin-bottom:1.5rem;display:flex}.dk-error-btn{font-family:var(--sans);border:1px solid var(--border);background:var(--bg-elev);color:var(--text-2);cursor:pointer;border-radius:10px;min-height:44px;padding:.625rem 1.25rem;font-size:.9rem;font-weight:500;transition:background .15s,border-color .15s,color .15s}.dk-error-btn:hover{background:var(--bg-soft);border-color:var(--text-subtle);color:var(--text)}.dk-error-btn:focus-visible{outline:2px solid var(--accent);outline-offset:2px}.dk-error-btn.primary{background:var(--accent);border-color:var(--accent);color:var(--text-on-accent)}.dk-error-btn.primary:hover{background:var(--accent-dark);border-color:var(--accent-dark);color:var(--text-on-accent)}.dk-error-btn.ghost{color:var(--text-muted);text-underline-offset:4px;background:0 0;border-color:#0000;padding-left:.75rem;padding-right:.75rem;text-decoration:underline}.dk-error-btn.ghost:hover{color:var(--text);background:0 0}.dk-error-details{text-align:left;width:100%;max-width:640px;color:var(--text-muted);margin-top:.5rem;font-size:.8rem}.dk-error-details summary{cursor:pointer;color:var(--text-subtle);-webkit-user-select:none;user-select:none;padding:.5rem}.dk-error-details summary:hover{color:var(--text-muted)}.dk-error-stack{background:var(--bg-soft);border:1px solid var(--border-soft);font-family:var(--mono);color:var(--text-muted);white-space:pre-wrap;word-break:break-word;border-radius:8px;max-height:240px;margin:.5rem 0 0;padding:.75rem 1rem;font-size:.75rem;line-height:1.5;overflow:auto}@media (prefers-reduced-motion:reduce){.dk-error-btn{transition:none}}.chapter-row{border-bottom:1px solid var(--border-soft);align-items:center;gap:14px;padding:14px 0;display:flex}.chapter-row:last-child{border-bottom:none}.chapter-row .chap-name{font-family:var(--sans);color:var(--text);flex:1;font-size:16px;font-weight:500}.chapter-row .chap-progress{color:var(--text-muted);font-size:13px;font-family:var(--mono);flex-shrink:0}.chapter-row .chap-bar{background:var(--bg-soft);border-radius:999px;flex-shrink:0;width:80px;height:4px;overflow:hidden}@media (width>=720px){.chapter-row .chap-bar{width:140px}}.chapter-row .chap-bar-fill{background:var(--accent);border-radius:999px;height:100%;transition:width .45s}.chapter-row.complete .chap-bar-fill{background:var(--green)}.drag-overlay{border:2.5px dashed var(--accent);z-index:200;pointer-events:none;font-family:var(--sans);color:var(--accent-dark);letter-spacing:-.01em;text-align:center;background:#6608740f;border-radius:14px;justify-content:center;align-items:center;padding:24px;font-size:clamp(20px,4vw,30px);font-weight:500;display:none;position:fixed;inset:12px}.drag-overlay.active{display:flex}.welcome{max-width:560px;margin:16px 0 0}.welcome .eyebrow{letter-spacing:.16em;text-transform:uppercase;color:var(--accent);margin-bottom:14px;font-size:11.5px;font-weight:600}.welcome h1{font-family:var(--sans);letter-spacing:-.024em;font-variation-settings:"opsz" 60;margin:0 0 16px;font-size:clamp(28px,5.2vw,42px);font-weight:600;line-height:1.12}.welcome p{color:var(--text-2);font-size:clamp(15px,2.4vw,17px);line-height:1.7;font-family:var(--sans);font-variation-settings:"opsz" 18;margin:0 0 16px}.welcome .hint{font-family:var(--sans);color:var(--text-muted);background:var(--bg-elev);border:1px solid var(--border-soft);border-radius:10px;margin-top:24px;padding:14px 16px;font-size:13.5px;line-height:1.65}.welcome .hint code{font-family:var(--mono);background:var(--bg-soft);color:var(--accent-dark);border-radius:4px;padding:1px 6px;font-size:12.5px}.welcome .actions{gap:12px;margin-top:24px;display:flex}.btn-primary{background:var(--accent);color:var(--text-on-accent);border:1px solid var(--accent);border-radius:8px;min-height:46px;padding:13px 22px;font-size:14.5px;font-weight:500;transition:background .14s}.btn-primary:active{background:var(--accent-dark)}.signature{border-top:1px solid var(--border-soft);color:var(--text-subtle);letter-spacing:.04em;margin-top:64px;padding-top:22px;font-size:12px}.kp-nav-btn{background:var(--bg-elev);border:1px solid var(--border-strong);border-radius:13px;align-items:center;gap:9px;min-height:64px;padding:13px 14px;text-decoration:none;transition:all .16s;display:flex}.kp-nav-label{color:var(--text-soft);font-size:11px;font-weight:400}.kp-nav-title{font-family:var(--sans);color:var(--text);text-overflow:ellipsis;white-space:nowrap;font-size:13.5px;font-weight:600;overflow:hidden}.search-shell{max-width:760px;margin:0 auto;padding:10px 18px 18px}.search-topbar{align-items:center;gap:11px;display:flex}.search-back{width:36px;height:36px;color:var(--text);-webkit-tap-highlight-color:transparent;background:0 0;border:none;border-radius:50%;justify-content:center;align-items:center;padding:0;display:flex}.search-back svg{width:22px;height:22px}.search-back:active{background:var(--bg-soft)}.search-top-input{border:1.5px solid var(--accent);background:#fff;border-radius:13px;flex:1;align-items:center;gap:9px;padding:11px 14px;transition:background .16s;display:flex;position:relative;box-shadow:0 1px 2px #00000008}.search-top-input svg{width:17px;height:17px;stroke:var(--accent);fill:none;stroke-width:2px;stroke-linecap:round;stroke-linejoin:round;flex-shrink:0}.search-top-input .search-input{color:var(--text);background:0 0;border:none;outline:none;flex:1;min-width:0;font-size:14.5px}.search-top-input .search-input::placeholder{color:var(--text-subtle)}.search-top-input .search-clear{opacity:0;position:static;transform:none}.search-top-input .search-clear.visible{opacity:1}.search-input{font-family:var(--sans);color:var(--text);min-width:0;caret-color:var(--accent);background:0 0;border:none;outline:none;flex:1;padding:0;font-size:14.5px}.search-input:focus-visible{outline:none}.search-input::placeholder{color:var(--text-subtle)}.search-clear{width:28px;height:28px;color:var(--text-faint);visibility:hidden;border-radius:8px;flex-shrink:0;place-items:center;display:grid}.search-clear.visible{visibility:visible}.search-clear:hover,.search-clear:active{background:var(--bg-soft);color:var(--text)}.search-clear svg{stroke:currentColor;width:14px;height:14px}.search-chips{flex-wrap:wrap;gap:8px;margin:14px 0 0;display:flex}.search-chip{background:var(--bg-elev);border:1px solid var(--border-strong);min-height:32px;color:var(--text-muted);border-radius:18px;align-items:center;padding:7px 14px;font-size:13px;transition:all .14s;display:inline-flex}.search-chip:hover,.search-chip:active{background:var(--accent-bg);color:var(--accent-dark);border-color:var(--accent-soft)}.search-chip.active{background:var(--accent);color:var(--text-on-accent);border-color:var(--accent);font-weight:600}.search-results{margin:20px 0 0;padding:0;list-style:none}.search-result{background:var(--bg-elev);border:1px solid var(--border);box-shadow:var(--shadow-sm);cursor:pointer;border-radius:15px;margin-bottom:10px;padding:15px 16px;transition:all .16s;display:block}.search-result:hover,.search-result:active{border-color:var(--accent);background:var(--accent-bg);box-shadow:var(--shadow-md)}.search-result-head{flex-wrap:wrap;align-items:center;gap:8px;display:flex}.search-result-tag{background:var(--bg-soft);color:var(--text-muted);border-radius:5px;flex-shrink:0;align-items:center;padding:2px 7px;font-size:10.5px;font-weight:600;display:inline-flex}.search-result-tag.t-mistake{background:var(--red-bg);color:var(--red)}.search-result-tag.t-tip{background:var(--tip-bg);color:var(--tip-accent-dark)}.search-result-tag.t-example{color:var(--blue);background:#4a6b8f1a}.search-result-tag.t-point{background:var(--accent-bg);color:var(--accent)}.search-result-tag.t-define{background:var(--bg-soft);color:var(--text-2)}.search-result-kp{font-family:var(--sans);color:var(--text-soft);font-size:12px;font-weight:400}.search-result-title{margin-top:8px;font-size:15px;font-weight:600}.search-result-snippet{color:var(--text-muted);margin-top:5px;font-size:13px;line-height:1.65}.search-result-snippet mark{background:var(--accent)}@supports (color:color-mix(in lab, red, red)){.search-result-snippet mark{background:color-mix(in srgb, var(--accent) 16%, transparent)}}.search-result-snippet mark{color:var(--accent);border-radius:3px;padding:0 2px}.search-meta{color:var(--text-soft);margin:18px 0 4px;font-size:12px}.dk-empty{text-align:center;color:var(--text-muted);font-family:var(--sans);padding:56px 20px;font-size:14.5px;line-height:1.6}.dk-empty-mark{font-family:var(--sans);color:var(--text-subtle);margin-bottom:14px;font-size:36px;line-height:1}.dk-empty-message{color:var(--text-2)}.dk-empty-hint{color:var(--text-subtle);margin-top:6px;font-size:13px}.dk-empty-action{margin-top:16px}.dk-empty-action a,.dk-empty-action button{font-family:var(--sans);color:var(--accent-dark);border:1px solid var(--accent-soft);background:var(--accent-bg);cursor:pointer;border-radius:10px;align-items:center;gap:6px;min-height:40px;padding:8px 18px;font-size:14px;font-weight:500;text-decoration:none;transition:background .15s,border-color .15s;display:inline-flex}.dk-empty-action a:hover,.dk-empty-action button:hover{background:var(--accent-soft);border-color:var(--accent)}.dk-error-state{text-align:center;color:var(--text-muted);font-family:var(--sans);padding:48px 20px;font-size:14.5px;line-height:1.6}.dk-error-state-mark{background:var(--warn-bg);width:40px;height:40px;color:var(--red);border-radius:50%;justify-content:center;align-items:center;margin:0 auto 12px;font-size:20px;font-weight:700;line-height:1;display:flex}.dk-error-state-message{color:var(--text-2)}.dk-error-state-retry{font-family:var(--sans);border:1px solid var(--border);background:var(--bg-elev);color:var(--text-2);cursor:pointer;border-radius:10px;min-height:40px;margin-top:14px;padding:8px 20px;font-size:14px;font-weight:500;transition:background .15s,border-color .15s}.dk-error-state-retry:hover{background:var(--bg-soft);border-color:var(--text-subtle);color:var(--text)}.dk-error-state-retry:focus-visible{outline:2px solid var(--accent);outline-offset:2px}@media (prefers-reduced-motion:reduce){.dk-empty-action a,.dk-empty-action button,.dk-error-state-retry{transition:none}}.mistake-shell{max-width:760px;margin:0 auto}.mistake-shell h1{font-family:var(--sans);margin:0;font-size:26px;font-weight:700}.mistake-shell .mistake-sub{font-family:var(--sans);color:var(--text-subtle);margin:8px 0 0;font-size:13.5px;line-height:1.7}.mistake-shell .mistake-sub b{color:var(--text);font-weight:600}.mistake-shell .mistake-sub b.q-mark{color:var(--tip-accent);font-weight:600}.mistake-filter{flex-wrap:wrap;gap:8px;margin:0 0 24px;display:flex}.mistake-group{margin-bottom:28px}.mistake-group-head{font-family:var(--sans);color:var(--text-soft);letter-spacing:.06em;justify-content:space-between;align-items:center;gap:10px;margin:22px 2px 9px;font-size:12px;font-weight:700;display:flex}.mistake-group-head .count{font-family:var(--sans);color:var(--text-soft);letter-spacing:0;font-size:11.5px;font-weight:400}.mistake-item{background:var(--bg-elev);border:1px solid var(--border);box-shadow:var(--shadow-sm);border-radius:16px;margin-bottom:10px;padding:16px;transition:all .16s}.mistake-item .mi-head{align-items:flex-start;gap:11px;display:flex}.confused-item .mi-head{align-items:center;gap:7px}.confused-item .mi-source{font-family:var(--sans);color:var(--text);font-size:14.5px;font-weight:600}.wrong-item .mi-head{align-items:center;gap:8px}.mistake-item .mi-title-wrap{flex:1;align-items:center;gap:8px;min-width:0;display:flex}.mistake-item .mi-title{font-family:var(--sans);color:var(--text);font-size:15px;font-weight:700;line-height:1.4}.mistake-item .mi-stuck-badge{color:var(--red);background:var(--red);font-size:10.5px;font-weight:600}@supports (color:color-mix(in lab, red, red)){.mistake-item .mi-stuck-badge{background:color-mix(in srgb, var(--red) 10%, transparent)}}.mistake-item .mi-stuck-badge{white-space:nowrap;border-radius:5px;flex-shrink:0;padding:2px 7px}.mistake-item .mi-body{color:var(--text-2);margin-top:6px;padding-left:31px;font-size:13.5px;line-height:1.7}.mistake-item .mi-body p{margin:6px 0}.mistake-item .mi-body strong{color:var(--text);font-weight:600}.mistake-item .mi-actions{border-top:1px solid var(--border);justify-content:space-between;align-items:center;gap:10px;margin-top:12px;padding-top:12px;display:flex}.confused-item .mi-actions{border-top:none;margin-top:13px;padding-top:0}.mistake-item .mi-time{color:var(--text-faint);font-size:12px}.mistake-item .mi-jump{color:var(--text-on-accent);background:var(--accent);cursor:pointer;border:none;border-radius:8px;padding:5px 11px;font-family:inherit;font-size:12px;font-weight:600}.confused-item .mi-jump{border-radius:9px;padding:6px 13px;font-size:12.5px}.mistake-item .mi-resolve{color:var(--text-subtle);border:1px solid var(--border-strong);cursor:pointer;background:0 0;border-radius:9px;padding:6px 12px;font-family:inherit;font-size:12.5px;font-weight:600}.mistake-item .mi-resolve:hover{border-color:var(--tip-accent);color:var(--tip-accent)}.mistake-item .confused-dot{background:var(--tip-accent);border-radius:50%;flex-shrink:0;width:6px;height:6px}.article h3.tip-h3{align-items:center;gap:10px;display:flex}.tip-share-btn{min-height:36px;color:var(--accent-dark);background:var(--accent-bg);border:1px solid var(--accent-soft);cursor:pointer;border-radius:8px;flex-shrink:0;align-items:center;gap:4px;margin-left:auto;padding:0 12px;font-size:11.5px;font-weight:500;transition:all .14s;display:inline-flex}.tip-share-btn:hover,.tip-share-btn:active{background:var(--accent);color:var(--text-on-accent);border-color:var(--accent)}.tip-share-btn svg{stroke:currentColor;fill:none;stroke-width:2px;stroke-linecap:round;stroke-linejoin:round;width:12px;height:12px}.card-modal{z-index:120;-webkit-backdrop-filter:blur(6px);padding:max(20px, var(--safe-t)) 20px max(20px, var(--safe-b));overscroll-behavior:contain;-webkit-overflow-scrolling:touch;background:#0000009e;justify-content:center;align-items:center;display:none;position:fixed;inset:0;overflow-y:auto}.card-modal.open{display:flex}.card-modal-inner{flex-direction:column;gap:14px;width:100%;max-width:420px;display:flex}.tip-card{background:linear-gradient(160deg, var(--bg-elev) 0%, var(--tip-bg) 100%);border:1px solid var(--tip-border);box-shadow:var(--shadow-tip);color:var(--text);font-family:var(--sans);border-radius:22px;padding:32px 28px 26px;position:relative;overflow:hidden}.tip-card:before{content:"";background:var(--tip-accent);border-radius:50%;width:160px;height:160px;position:absolute;top:-40px;right:-40px}@supports (color:color-mix(in lab, red, red)){.tip-card:before{background:color-mix(in srgb, var(--tip-accent) 10%, transparent)}}.tip-card:before{pointer-events:none}.tip-card-brand{align-items:center;gap:10px;margin-bottom:22px;display:flex;position:relative}.tip-card-brand .mark{background:var(--accent);width:28px;height:28px;color:var(--text-on-accent);font-family:var(--sans);border-radius:7px;place-items:center;font-size:15px;font-weight:700;display:grid}.tip-card-brand .name{color:var(--text-2);letter-spacing:.05em;font-size:13px}.tip-card-label{font-family:var(--sans);letter-spacing:.18em;text-transform:uppercase;color:var(--tip-accent);margin-bottom:10px;font-size:11px;font-weight:600}.tip-card-title{font-family:var(--sans);letter-spacing:-.015em;color:var(--text);font-variation-settings:"opsz" 28;margin:0 0 14px;font-size:22px;font-weight:600;line-height:1.28;position:relative}.tip-card-body{font-family:var(--sans);color:var(--text-2);font-size:15.5px;line-height:1.7;position:relative}.tip-card-body p{margin:0 0 10px}.tip-card-body p:last-child{margin-bottom:0}.tip-card-body strong{color:var(--text);font-weight:600}.tip-card-body ul,.tip-card-body ol{margin:8px 0 10px;padding-left:22px}.tip-card-body li{margin:4px 0}.tip-card-body .katex{font-size:1em}.tip-card-source{border-top:1px solid var(--border-strong);font-family:var(--sans);color:var(--text-muted);justify-content:space-between;align-items:center;margin-top:22px;padding-top:14px;font-size:11.5px;display:flex;position:relative}.tip-card-source .src-kp{color:var(--text-2);font-weight:500}.tip-card-source .src-tag{letter-spacing:.14em;text-transform:uppercase;color:var(--tip-accent);font-size:10px;font-weight:600}.card-actions{flex-wrap:wrap;gap:10px;display:flex}.card-action-btn{background:var(--bg-elev);min-width:0;min-height:44px;color:var(--text);border:1px solid var(--border-soft);border-radius:10px;flex:1;justify-content:center;align-items:center;gap:6px;padding:0 18px;font-size:14px;font-weight:500;transition:all .14s;display:inline-flex}.card-action-btn:hover,.card-action-btn:active{background:var(--bg-elev);border-color:var(--accent);color:var(--accent-dark)}.card-action-btn.primary{background:var(--accent);color:var(--text-on-accent);border-color:var(--accent)}.card-action-btn.primary:hover,.card-action-btn.primary:active{background:var(--accent-dark);border-color:var(--accent-dark);color:var(--text-on-accent)}.card-hint{text-align:center;color:var(--text-on-accent);font-size:12px}@supports (color:color-mix(in lab, red, red)){.card-hint{color:color-mix(in srgb, var(--text-on-accent) 78%, transparent)}}.card-hint{letter-spacing:.02em;font-family:var(--sans)}.confirm-overlay{z-index:130;-webkit-backdrop-filter:blur(6px);padding:max(20px, var(--safe-t)) 20px max(20px, var(--safe-b));background:#0f172a80;justify-content:center;align-items:center;animation:.16s confirm-fade;display:flex;position:fixed;inset:0}@keyframes confirm-fade{0%{opacity:0}to{opacity:1}}.confirm-card{background:var(--bg-elev);border:1px solid var(--border-soft);border-radius:var(--radius-lg);width:100%;max-width:380px;box-shadow:var(--shadow-lg);padding:26px 24px 22px}.confirm-title{font-family:var(--sans);color:var(--text);letter-spacing:-.01em;margin:0 0 8px;font-size:17px;font-weight:600}.confirm-message{color:var(--text-2);overflow-wrap:anywhere;margin:0 0 20px;font-size:14.5px;line-height:1.6}.confirm-actions{gap:10px;display:flex}.confirm-actions .card-action-btn{flex:1}.card-action-btn.danger{background:var(--red);color:var(--text-on-accent);border-color:var(--red)}.card-action-btn.danger:hover,.card-action-btn.danger:active{background:var(--red-bright);border-color:var(--red-bright);color:var(--text-on-accent)}.prompt-input{border:1px solid var(--border);border-radius:var(--radius-sm);width:100%;color:var(--text);background:var(--bg-soft);box-sizing:border-box;margin:0 0 18px;padding:10px 12px;font-size:14px;transition:border-color .14s,box-shadow .14s}.prompt-input:focus{border-color:var(--accent);box-shadow:0 0 0 3px var(--accent-soft);outline:none}.prompt-textarea{resize:vertical;min-height:64px;font-family:var(--sans);line-height:1.5}.kp-toolbar{flex-wrap:wrap;align-items:center;gap:12px;margin:0 0 22px;display:flex}.kp-mode-toggle{background:var(--bg-soft);border-radius:9px;padding:3px;font-size:12.5px;display:inline-flex}.kp-mode-toggle .seg-btn{min-height:36px;color:var(--text-muted);border-radius:7px;padding:6px 14px;font-weight:500;transition:all .14s}.kp-mode-toggle .seg-btn.active{background:var(--bg-elev);color:var(--text);box-shadow:0 1px 2px #0000000f}.density-dial{background:var(--bg-soft);border-radius:11px;gap:2px;padding:3px;display:inline-flex}.density-seg{min-height:36px;color:var(--text-muted);border-radius:8px;padding:7px 15px;font-size:13px;font-weight:500;transition:color .16s,background .16s,box-shadow .16s}.density-seg.active{background:var(--bg-elev);color:var(--text);font-weight:600;box-shadow:0 1px 3px #0000001a}.density-seg:hover:not(.active),.density-seg:active:not(.active){color:var(--text-2)}.density-hint{color:var(--accent-dark);background:var(--accent-bg);border:1px solid var(--accent-soft);border-radius:10px;margin:0 0 22px;padding:13px 16px;font-size:13.5px;line-height:1.6}body.density-exam .kp-section[data-kind=why],body.density-exam .kp-section[data-kind=example],body.density-exam .kp-section[data-kind=practice],body.density-exam .kp-section[data-kind=confidence],body.density-exam .kp-section[data-kind=path],body.density-exam .toc-card li[data-kind=why],body.density-exam .toc-card li[data-kind=example],body.density-exam .toc-card li[data-kind=practice],body.density-exam .toc-card li[data-kind=confidence],body.density-exam .toc-card li[data-kind=path],body.density-exam .sheet-list li[data-kind=why],body.density-exam .sheet-list li[data-kind=example],body.density-exam .sheet-list li[data-kind=practice],body.density-exam .sheet-list li[data-kind=confidence],body.density-exam .sheet-list li[data-kind=path],body.density-glance .prose .kp-section,body.density-glance .toc-card,body.density-glance .progress-bar,body.density-glance .reader-progress-card,body.density-glance .challenge-card,body.density-glance .related-card,body.density-glance .backlinks-card,body.density-glance .kp-chapter-context,body.density-glance .kp-nav,body.density-glance .signature{display:none}body.density-glance .article .lead{font-family:var(--sans);color:var(--text);border-left:3px solid var(--accent);margin:8px 0 4px;padding-left:18px;font-size:clamp(20px,3.4vw,26px);line-height:1.5}.article .kp-section[data-kind=tip],.article .kp-section[data-kind=mistake]{border-radius:18px;margin:14px 0;padding:18px}.article .kp-section[data-kind=tip]{background:var(--ink-block);color:var(--ink-block-fg);border:none}.article .kp-section[data-kind=mistake]{background:var(--warn-bg);border:1px solid var(--warn-border)}.article .kp-section[data-kind=tip]>h2,.article .kp-section[data-kind=mistake]>h2{font-family:var(--sans);letter-spacing:0;border-top:none;margin:0 0 9px;padding:0;font-size:14px;font-weight:700}.article .kp-section[data-kind=tip]>h2{color:var(--text-on-accent);font-size:0;line-height:0}.article .kp-section[data-kind=tip]>h2:before{content:"技 巧 点 拨";letter-spacing:.12em;color:var(--ink-block-accent);margin-bottom:8px;font-size:10.5px;font-weight:700;line-height:1.45;display:block}.article .kp-section[data-kind=tip]>h2 .h2-marks{font-size:11px;line-height:1}.article .kp-section[data-kind=tip]>h2 .mark-btn{color:#f3e9f5b3;border-color:#f3e9f538}.article .kp-section[data-kind=tip]>h2 .mark-btn:hover:not(.active){border-color:var(--ink-block-accent);color:var(--ink-block-accent);background:#f3e9f514}.article .kp-section[data-kind=tip]>h2 .dontknow-btn.active{background:var(--red);border-color:var(--red);color:var(--text-on-accent)}.article .kp-section[data-kind=tip]>h2 .confused-btn.active{background:var(--tip-accent);border-color:var(--tip-accent);color:var(--text-on-accent)}.article .kp-section[data-kind=tip]>h2 .done-btn.active{background:var(--accent);border-color:var(--accent);color:var(--text-on-accent)}.article .kp-section[data-kind=tip] p,.article .kp-section[data-kind=tip] li{color:#f3e9f5c7;font-size:13px;line-height:1.7}.article .kp-section[data-kind=tip] p .katex,.article .kp-section[data-kind=tip] li .katex{color:var(--ink-block-fg)}.article .kp-section[data-kind=tip] p strong,.article .kp-section[data-kind=tip] li strong{color:var(--text-on-accent)}.article .kp-section[data-kind=mistake]>h2{color:var(--red)}.article .kp-section[data-kind=tip]>h2 .sec-icon,.article .kp-section[data-kind=mistake]>h2 .sec-icon{display:none}.article .kp-section[data-kind=tip] h3.tip-h3{color:var(--text-on-accent);align-items:center;gap:10px;margin:18px 0 10px;font-size:17px;font-weight:700;line-height:1.45;display:flex}.article .kp-section[data-kind=tip] h3.tip-h3:first-of-type{margin-top:0}.article .kp-section[data-kind=tip] h3.tip-h3 .h3-marks{display:none}.article .kp-section[data-kind=tip] h3.tip-h3 .tip-share-btn{color:var(--ink-block-fg);background:#f3e9f51f;border-color:#f3e9f538;margin-left:auto}.article .kp-section[data-kind=tip] h3.tip-h3 .tip-share-btn:hover{background:var(--accent);border-color:var(--accent);color:var(--text-on-accent)}.article .kp-section[data-kind=tip] p:last-child,.article .kp-section[data-kind=mistake] p:last-child{margin-bottom:0}.article h2.sec-why .sec-icon{color:var(--text-subtle)}.kp-resume-hint{color:var(--accent-dark);background:var(--accent-bg);border-radius:6px;padding:5px 10px;font-size:12px;animation:2.4s forwards fadeOut}@keyframes fadeOut{0%,70%{opacity:1}to{opacity:0}}body.simple-mode .kp-section[data-kind=example],body.simple-mode .kp-section[data-kind=practice],body.simple-mode .toc-card li[data-kind=example],body.simple-mode .toc-card li[data-kind=practice],body.simple-mode .sheet-list li[data-kind=example],body.simple-mode .sheet-list li[data-kind=practice]{display:none}.kp-stumbled-callout{background:var(--warn-bg);border:1px solid var(--warn-bg);border-radius:11px;gap:14px;margin:18px 0 22px;padding:14px 16px;display:flex}.kp-stumbled-callout .callout-icon{flex-shrink:0;font-size:22px;line-height:1}.kp-stumbled-callout .callout-title{font-family:var(--sans);color:var(--red);margin-bottom:6px;font-size:14.5px;font-weight:600}.kp-stumbled-callout .callout-list{color:var(--text-2);margin:0;padding:0;font-size:13.5px;line-height:1.55;list-style:none}.kp-stumbled-callout .callout-list li{padding-left:12px;position:relative}.kp-stumbled-callout .callout-list li:before{content:"·";color:var(--red);font-weight:700;position:absolute;left:2px}.mi-stumble{color:var(--text-subtle);border:1px solid var(--border-strong);cursor:pointer;background:0 0;border-radius:8px;flex-shrink:0;padding:5px 11px;font-family:inherit;font-size:12px;font-weight:500;transition:all .14s}.mistake-item.is-stumbled{border-color:#b5564e59}.mistake-item .mi-warn{width:20px;height:20px;stroke:var(--red);fill:none;stroke-width:1.9px;stroke-linecap:round;stroke-linejoin:round;flex-shrink:0;margin-top:1px}.stumbled-tag{background:var(--red)!important}@supports (color:color-mix(in lab, red, red)){.stumbled-tag{background:color-mix(in srgb, var(--red) 10%, transparent)!important}}.stumbled-tag{color:var(--red)!important}.confused-tag{background:var(--tip-accent)!important}@supports (color:color-mix(in lab, red, red)){.confused-tag{background:color-mix(in srgb, var(--tip-accent) 13%, transparent)!important}}.confused-tag{color:var(--tip-accent)!important}.mi-tag.tag-error{background:var(--red)}@supports (color:color-mix(in lab, red, red)){.mi-tag.tag-error{background:color-mix(in srgb, var(--red) 10%, transparent)}}.mi-tag.tag-error{color:var(--red)}.mi-tag.tag-trap{background:var(--tip-accent)}@supports (color:color-mix(in lab, red, red)){.mi-tag.tag-trap{background:color-mix(in srgb, var(--tip-accent) 13%, transparent)}}.mi-tag.tag-trap{color:var(--tip-accent)}.ep-countdown{background:var(--ink-block);color:var(--ink-block-fg);border-radius:18px;justify-content:space-between;align-items:center;gap:14px;margin-bottom:0;padding:18px;display:flex}.ep-countdown-left{flex-direction:column;gap:3px;display:flex}.ep-countdown-label{color:var(--accent-on-dark);letter-spacing:.04em;font-size:12px}.ep-countdown-num{color:var(--text-on-accent);font-variant-numeric:tabular-nums;font-size:30px;font-weight:700;line-height:1}.ep-countdown-num span{color:var(--ink-block-fg);margin-left:4px;font-size:14px;font-weight:400}.ep-countdown-right{flex-direction:column;align-items:flex-end;gap:3px;display:flex}.ep-countdone{color:var(--text-on-accent);font-variant-numeric:tabular-nums;font-size:18px;font-weight:700;line-height:1}.ep-group-label{color:var(--text-soft);letter-spacing:.06em;margin:22px 2px 9px;font-size:12px;font-weight:700}.nh{max-width:640px;padding-top:calc(10px + var(--safe-t));margin:0 auto}.nh-topbar{justify-content:space-between;align-items:center;margin:0 0 22px;display:flex}.nh-wordmark{font-family:var(--sans);color:var(--text);letter-spacing:-.01em;font-size:18px;font-weight:600}.nh-topbar-right{align-items:center;gap:12px;display:flex}.nh-ctx-chip{background:var(--bg-soft);color:var(--text-muted);border-radius:14px;align-items:center;gap:5px;padding:6px 11px;font-size:12.5px;font-weight:500;display:inline-flex}.nh-ctx-chip svg{width:13px;height:13px;stroke:var(--text-subtle);fill:none;stroke-width:2px;stroke-linecap:round;stroke-linejoin:round}.nh-icon-btn{min-width:44px;min-height:44px;color:var(--text-muted);border-radius:10px;place-items:center;display:grid}.nh-icon-btn:hover,.nh-icon-btn:active{background:var(--bg-soft);color:var(--text)}.nh-icon-btn svg{stroke:currentColor;fill:none;stroke-width:1.7px;stroke-linecap:round;stroke-linejoin:round;width:21px;height:21px}.nh-avatar{background:var(--accent-bg);width:30px;height:30px;color:var(--accent);border-radius:50%;place-items:center;display:grid}.nh-avatar svg{stroke:currentColor;fill:none;stroke-width:1.8px;stroke-linecap:round;stroke-linejoin:round;width:17px;height:17px}.nh-hero{margin:4px 0 26px}.nh-greet{color:var(--text-subtle);margin-bottom:6px;font-size:13px;font-weight:500}.nh-title{font-family:var(--sans);letter-spacing:-.022em;color:var(--text);font-variation-settings:"opsz" 50;margin:0 0 18px;font-size:clamp(28px,6vw,38px);font-weight:600;line-height:1.1}.nh-search{background:var(--bg-elev);border:1px solid var(--border-soft);border-radius:999px;align-items:center;gap:12px;height:54px;padding:0 18px;transition:border-color .16s;display:flex;box-shadow:0 1px 2px #0000000a}.nh-search:hover,.nh-search:active{border-color:var(--accent-soft)}.nh-search svg{width:21px;height:21px;stroke:var(--accent);fill:none;stroke-width:1.8px;stroke-linecap:round;stroke-linejoin:round;flex-shrink:0}.nh-search-ph{color:var(--text-subtle);font-size:15.5px}.nh-resume{background:var(--accent-bg);border:1px solid var(--accent-soft);border-radius:16px;align-items:center;gap:15px;margin-bottom:28px;padding:16px 18px;display:flex}.nh-resume-icon{background:var(--accent);border-radius:50%;flex-shrink:0;place-items:center;width:44px;height:44px;display:grid}.nh-resume-icon svg{width:18px;height:18px;color:var(--text-on-accent)}.nh-resume-text{flex-direction:column;flex:1;gap:3px;min-width:0;display:flex}.nh-resume-label{letter-spacing:.14em;text-transform:uppercase;color:var(--accent-dark);font-size:11px;font-weight:700}.nh-resume-title{font-family:var(--sans);color:var(--text);letter-spacing:-.01em;text-overflow:ellipsis;white-space:nowrap;font-size:18px;font-weight:600;overflow:hidden}.nh-resume-meta{color:var(--text-muted);font-size:12.5px}.nh-resume-arrow{color:var(--accent);flex-shrink:0;font-size:20px}.nh-block{margin-bottom:28px}.nh-block-head{justify-content:space-between;align-items:center;margin:0 2px 4px;display:flex}.nh-label{letter-spacing:.16em;text-transform:uppercase;color:var(--text-subtle);font-size:11px;font-weight:700}.nh-version{color:var(--accent-dark);border-radius:7px;padding:4px 8px;font-size:13px;font-weight:500}.nh-version:hover,.nh-version:active{background:var(--accent-bg)}.nh-version--static{color:var(--text-subtle);cursor:default}.nh-version--static:hover,.nh-version--static:active{background:0 0}.nh-ver-wrap{position:relative}.nh-ver-menu{z-index:60;background:var(--bg-elev);border:1px solid var(--border);border-radius:12px;min-width:124px;padding:5px;position:absolute;top:calc(100% + 6px);right:0;box-shadow:0 6px 16px #211d171a,0 2px 5px #211d170f}.nh-ver-item{width:100%;color:var(--text-2);text-align:left;border-radius:8px;justify-content:space-between;align-items:center;gap:10px;padding:9px 11px;font-size:14px;font-weight:500;display:flex}.nh-ver-item:hover,.nh-ver-item:active{background:var(--bg-soft)}.nh-ver-item.active{color:var(--accent-dark)}.nh-ver-item svg{width:15px;height:15px;stroke:var(--accent);fill:none;stroke-width:2.4px;stroke-linecap:round;stroke-linejoin:round;flex-shrink:0}.nh-courses{flex-direction:column;display:flex}.nh-course{text-align:left;align-items:center;gap:14px;width:100%;padding:17px 2px;display:flex}.nh-course-dot{border-radius:50%;flex-shrink:0;width:9px;height:9px}.nh-course-name{font-family:var(--sans);color:var(--text);letter-spacing:-.008em;flex:1;font-size:19px;font-weight:600}.nh-course-meta{color:var(--text-subtle);font-size:13px}.nh-course-arrow{color:var(--text-subtle);font-size:18px}.nh-course:hover .nh-course-name,.nh-course:active .nh-course-name{color:var(--accent-dark)}.nh .daily-card{margin-bottom:28px}.nh-quick{gap:10px;margin:4px 0 0;display:flex}.nh-quick-item{background:var(--bg-elev);border:1px solid var(--border-soft);color:var(--text-2);border-radius:13px;flex-direction:column;flex:1;align-items:center;gap:8px;padding:16px 8px;font-size:13px;font-weight:500;transition:border-color .16s,color .16s;display:flex}.nh-quick-item svg{width:22px;height:22px;stroke:var(--text-muted);fill:none;stroke-width:1.7px;stroke-linecap:round;stroke-linejoin:round}.nh-quick-item:hover,.nh-quick-item:active{border-color:var(--accent-soft);color:var(--accent-dark)}.nh-quick-item:hover svg,.nh-quick-item:active svg{stroke:var(--accent)}.nh-quick-item.is-accent{background:var(--accent-bg);border-color:var(--accent-soft);color:var(--accent-dark)}.nh-quick-item.is-accent svg{stroke:var(--accent)}.nh-sig{border-top:1px solid var(--border-soft);color:var(--text-subtle);letter-spacing:.04em;text-align:center;margin-top:40px;padding-top:20px;font-size:12px}.home-1b{max-width:480px;min-height:100dvh;margin:0 auto;padding-bottom:40px}.home-topbar{justify-content:space-between;align-items:center;padding:14px 22px 0;font-size:13px;font-weight:700;display:flex}.home-topbar-brand{letter-spacing:.04em;font-size:19px;font-weight:700}.home-topbar-left{align-items:center;gap:6px;display:flex}.home-menu-btn{width:36px;height:36px;color:var(--text-muted);-webkit-tap-highlight-color:transparent;background:0 0;border:none;border-radius:50%;justify-content:center;align-items:center;padding:0;display:flex}.home-menu-btn svg{width:20px;height:20px}.home-menu-btn:active{background:var(--bg-soft)}.home-topbar-actions{gap:6px;display:flex}.home-icon-btn{border-radius:50%;justify-content:center;align-items:center;width:36px;height:36px;display:flex}.home-icon-btn-alt{background:var(--icon-btn-bg)}.home-content{padding:10px 22px 0}.home-greeting{color:var(--text-subtle);margin-top:22px;font-size:13px}.home-h1-row{justify-content:space-between;align-items:baseline;margin-top:5px;display:flex}.home-h1{letter-spacing:-.01em;font-size:26px;font-weight:700}.home-countdown{color:var(--text-soft);font-size:12px}.home-search-entry{background:var(--bg-elev);cursor:pointer;border:1px solid #00000014;border-radius:14px;align-items:center;gap:10px;margin-top:16px;padding:13px 15px;display:flex;box-shadow:0 1px 2px #00000008}.home-search-entry-text{color:var(--text-subtle);font-size:14.5px}.home-focus-card{background:var(--bg-elev);border:1px solid var(--border);box-shadow:var(--shadow-lg);border-radius:22px;align-items:center;gap:18px;margin-top:18px;padding:20px 18px;display:flex}.home-focus-body{flex:1;min-width:0}.home-focus-title{font-size:17px;font-weight:700}.home-focus-sub{color:var(--text-muted);margin-top:4px;font-size:13px}.home-streak{color:var(--text-subtle);align-items:center;gap:7px;margin-top:11px;font-size:12px;display:flex}.home-streak-dot{background:var(--tip-accent);border-radius:50%;width:7px;height:7px}.home-continue-card{cursor:pointer;background:#f3e9f5;border-radius:16px;align-items:center;gap:14px;padding:15px 16px;display:flex}.home-continue-icon{background:var(--accent);border-radius:50%;flex:none;justify-content:center;align-items:center;width:42px;height:42px;display:flex}.home-continue-body{flex:1;min-width:0}.home-continue-title{color:var(--text);font-size:15.5px;font-weight:600}.home-continue-sub{color:var(--text-soft);margin-top:2px;font-size:12.5px}.home-subject-chips{flex-wrap:wrap;gap:9px;display:flex}.home-subject-chip{background:var(--bg-elev);border:1px solid var(--border);color:var(--text);border-radius:12px;align-items:center;gap:8px;padding:11px 14px;font-size:14px;font-weight:600;text-decoration:none;display:flex}.home-subject-dot{border-radius:50%;width:8px;height:8px}.home-subject-count{color:var(--text-soft);font-size:12px;font-weight:400}.home-gaokao-prompt{background:var(--accent-soft);color:var(--text-2);border-radius:14px;margin-top:18px;padding:14px 16px;font-size:13px;line-height:1.6}.home-gaokao-link{color:var(--accent);margin-left:6px;font-weight:600}.task-link{color:inherit;text-decoration:none;display:block}.kp-link{color:var(--accent);border-bottom:1px solid var(--accent-soft);cursor:pointer;text-decoration:none;transition:border-color .15s,color .15s}.kp-link:hover{color:var(--accent-dark);border-color:var(--accent)}.kp-link.dead{color:var(--text-muted);cursor:default;border-bottom-style:dashed}.callout{border-left:3.5px solid var(--accent);background:var(--accent-bg);border-radius:8px;margin:18px 0;padding:14px 18px}.callout-title{align-items:center;gap:6px;margin-bottom:6px;font-size:14px;font-weight:600;display:flex}.callout-title .callout-icon{font-size:15px}.callout-body>:first-child{margin-top:0}.callout-body>:last-child{margin-bottom:0}.card-fold{border:1px solid var(--border);border-radius:var(--radius-md);background:var(--bg);margin:18px 0;overflow:hidden}.card-fold>summary{cursor:pointer;font-family:var(--sans);-webkit-user-select:none;user-select:none;align-items:center;gap:7px;padding:11px 16px;font-size:14px;font-weight:600;list-style:none;transition:background .15s;display:flex}.card-fold>summary:before{content:"";opacity:.55;border-bottom:1.6px solid;border-right:1.6px solid;flex-shrink:0;width:6px;height:6px;margin-right:2px;transition:transform .18s;transform:rotate(-45deg)}.card-fold.fold-boost{border:1px solid var(--accent)}@supports (color:color-mix(in lab, red, red)){.card-fold.fold-boost{border:1px solid color-mix(in srgb, var(--accent) 22%, transparent)}}.card-fold.fold-boost{border-left:3px solid var(--accent);background:var(--boost-bg);border-radius:11px}.card-fold.fold-boost>summary{color:var(--accent);background:0 0}.card-fold.fold-boost>summary:hover{background:var(--accent)}@supports (color:color-mix(in lab, red, red)){.card-fold.fold-boost>summary:hover{background:color-mix(in srgb, var(--accent) 6%, transparent)}}.card-boostlock{border:1px solid var(--border);border-radius:var(--radius-md);background:var(--bg);text-align:center;margin:22px 0;padding:22px 18px}.card-boostlock .boostlock-title{font-family:var(--sans);color:var(--text);margin:0 0 4px;font-size:15.5px;font-weight:700}.card-boostlock .boostlock-sub{color:var(--text-muted);margin:0 0 16px;font-size:12.5px;line-height:1.5}.card-boostlock .boostlock-cta{border-radius:var(--radius-btn);background:var(--accent);color:var(--text-on-accent);box-shadow:var(--shadow-accent);border-bottom:none;padding:10px 24px;font-size:14px;font-weight:600;text-decoration:none;display:inline-block}.card-boostlock .boostlock-cta:hover{filter:brightness(1.06);box-shadow:var(--shadow-accent)}.article .kp-section[data-kind=tip] .card-boostlock,.article .kp-section[data-kind=mistake] .card-boostlock{background:var(--bg);border-color:var(--border)}.article .kp-section[data-kind=tip] .card-boostlock .boostlock-title,.article .kp-section[data-kind=mistake] .card-boostlock .boostlock-title{color:var(--text)}.article .kp-section[data-kind=tip] .card-boostlock .boostlock-sub,.article .kp-section[data-kind=mistake] .card-boostlock .boostlock-sub{color:var(--text-muted)}img.fig-authed-loading{background:var(--bg-soft);border:1px dashed var(--border-strong);border-radius:8px;min-width:120px;min-height:60px}.eq-stem img,.fig-missing+img,.rq-stem img{max-width:100%;height:auto}.fig-missing{vertical-align:middle;border:1px dashed var(--border-strong);background:var(--bg-soft);border-radius:8px;align-items:center;gap:6px;padding:4px 9px;display:inline-flex}.fig-missing .dk-icon{width:15px;height:15px;color:var(--text-faint);flex:none}.fig-missing-tag{font-family:var(--sans);color:var(--text-subtle);letter-spacing:.04em;font-size:12px}.fig-missing-alt{color:var(--text-2);font-size:12.5px;line-height:1.5}p>.fig-missing:only-child,.eq-stem>.fig-missing:only-child{border-radius:var(--radius-md);text-align:center;flex-direction:column;gap:6px;margin:14px 0;padding:16px 14px;display:flex}p>.fig-missing:only-child .dk-icon,.eq-stem>.fig-missing:only-child .dk-icon{width:20px;height:20px}p>.fig-missing:only-child .fig-missing-alt,.eq-stem>.fig-missing:only-child .fig-missing-alt{max-width:32em;margin:0 auto;font-size:13px;line-height:1.6}.card-fold.fold-why{border:1px solid var(--tip-accent)}@supports (color:color-mix(in lab, red, red)){.card-fold.fold-why{border:1px solid color-mix(in srgb, var(--tip-accent) 28%, transparent)}}.card-fold.fold-why{border-left:3px solid var(--tip-accent);background:var(--tip-bg-think);border-radius:11px}.card-fold.fold-why>summary{color:var(--tip-accent-dark);background:0 0}.card-fold.fold-why>summary:hover{background:var(--tip-accent)}@supports (color:color-mix(in lab, red, red)){.card-fold.fold-why>summary:hover{background:color-mix(in srgb, var(--tip-accent) 8%, transparent)}}.card-fold.fold-note{border:none;border-left:3px solid var(--border);background:var(--bg-soft);border-radius:0 10px 10px 0}.card-fold .card-fold{border:none;border-left:2px solid var(--accent-soft);background:0 0;border-radius:0;margin:12px 0}.card-fold .card-fold>summary{padding-top:6px;padding-bottom:6px;padding-left:12px;background:0 0!important}.card-fold .card-fold>.fold-body{margin-left:12px}.card-fold .card-fold.fold-why{border-left-color:var(--tip-border)}.card-fold .card-fold.fold-boost{border-left-color:var(--accent-soft)}.article .card-callout{border-radius:var(--radius-md);margin:18px 0;padding:14px 16px}.article .card-callout .callout-label{font-family:var(--sans);letter-spacing:.02em;margin:0 0 7px;font-size:12.5px;font-weight:700}.article .card-callout>:last-child{margin-bottom:0}.article .card-callout.callout-warn{background:var(--warn-bg);border:1px solid var(--warn-border)}.article .card-callout.callout-warn .callout-label,.article .card-callout.callout-warn strong{color:var(--red)}.article .mcq-opt{min-width:1.7em;color:var(--text);font-weight:700;display:inline-block}.article p .mcq-break{height:8px;display:block}.article .exam-reveal{border:1px solid var(--border);background:var(--bg-elev);border-radius:10px;margin:14px 0;overflow:hidden}.article .exam-reveal>summary{cursor:pointer;font-family:var(--sans);letter-spacing:.02em;-webkit-user-select:none;user-select:none;align-items:center;gap:8px;padding:11px 14px;font-size:13px;font-weight:700;list-style:none;transition:background .15s;display:flex}.article .exam-reveal>summary::-webkit-details-marker{display:none}.article .exam-reveal>summary:before{content:"";opacity:.6;border-bottom:1.8px solid;border-right:1.8px solid;flex-shrink:0;width:6px;height:6px;transition:transform .18s;transform:rotate(-45deg)}.article .exam-reveal[open]>summary:before{transform:rotate(45deg)}.article .exam-reveal>summary:hover{filter:brightness(.98)}.article .exam-reveal-cue{color:var(--text-subtle);letter-spacing:.04em;margin-left:auto;font-size:11.5px;font-weight:500}.article .exam-reveal[open] .exam-reveal-cue{display:none}.article .exam-reveal-body{color:var(--text);padding:0 14px 13px;font-size:15px;line-height:1.75}.article .exam-reveal-body>p{margin:0}.article .exam-reveal.exam-answer{background:var(--rv-ans-bg);border-color:var(--rv-ans-border)}.article .exam-reveal.exam-answer>summary{color:var(--rv-ans-ink)}.article .exam-reveal.exam-answer .exam-reveal-body{font-weight:600}.article .exam-reveal.exam-explain{background:var(--rv-exp-bg);border-color:var(--rv-exp-border)}.article .exam-reveal.exam-explain>summary{color:var(--rv-exp-ink)}.article .exam-reveal.exam-eye{background:var(--rv-eye-bg);border-color:var(--rv-eye-border)}.article .exam-reveal.exam-eye>summary{color:var(--rv-eye-ink)}.article .exam-reveal.exam-hint{background:var(--rv-hint-bg);border-color:var(--rv-hint-border)}.article .exam-reveal.exam-hint>summary{color:var(--rv-hint-ink)}.article li:has(>.exam-reveal){width:calc(100% + 26px);margin-left:-26px;list-style:none}.article li:has(>.exam-reveal)::marker{content:none}.rv-callback{border-top:1px dashed var(--border);color:var(--text-muted);margin-top:12px;padding-top:9px;font-size:13.5px;line-height:1.65;display:block}.rv-callback-label{font-family:var(--sans);letter-spacing:.06em;color:var(--text-subtle);margin-right:8px;font-size:11.5px;font-weight:700}.rv-callback-label:after{content:"·";color:var(--border);margin-left:8px}.article .exam-quiz{border:1px solid var(--border);background:var(--bg-elev);box-shadow:var(--shadow-sm);border-radius:16px;margin:13px 0 0;padding:16px}.article .exam-quiz [hidden]{display:none!important}.article .eq-stem{color:var(--text);margin-bottom:13px;font-size:14.5px;line-height:1.7}.article .eq-options{flex-direction:column;gap:9px;display:flex}.article .eq-opt{text-align:left;border:1px solid var(--border-strong);background:var(--bg-elev);cursor:pointer;width:100%;color:var(--text);border-radius:12px;align-items:center;gap:11px;padding:12px 14px;font-family:inherit;font-size:14.5px;line-height:1.6;transition:border-color .15s,background .15s,opacity .15s;display:flex}.article .eq-opt:hover:not(.locked):not(.eliminated){border-color:var(--accent-soft);background:var(--accent-bg)}.article .eq-badge{border:1.5px solid var(--border-strong);width:22px;height:22px;color:var(--text-2);background:var(--bg-elev);border-radius:50%;flex-shrink:0;justify-content:center;align-items:center;font-size:12px;font-weight:700;transition:all .15s;display:inline-flex}.article .eq-opt-body{flex:1}.article .eq-opt.selected{border-color:var(--accent);background:var(--accent-bg)}.article .eq-opt.selected .eq-badge{border-color:var(--accent);background:var(--accent);color:var(--text-on-accent)}.article .eq-opt.correct{border-color:var(--green);background:var(--green-bg)}.article .eq-opt.correct .eq-badge{border-color:var(--green);background:var(--green);color:var(--text-on-accent)}.article .eq-opt.wrong{border-color:var(--red);background:var(--warn-bg)}.article .eq-opt.wrong .eq-badge{border-color:var(--red);background:var(--red);color:var(--text-on-accent)}.article .eq-opt.eliminated{opacity:.5;cursor:default;border-style:dashed}.article .eq-opt.eliminated .eq-opt-body{text-decoration:line-through}.article .eq-opt.locked{cursor:default}.article .eq-feedback{margin-top:12px;font-size:14px;font-weight:600}.article .eq-feedback.is-correct{color:var(--green)}.article .eq-feedback.is-wrong{color:var(--red)}.article .eq-hint{background:var(--rv-hint-bg);border:1px solid var(--rv-hint-border);color:var(--text);border-radius:10px;margin-top:10px;padding:11px 14px 12px;font-size:13px;line-height:1.7}.article .eq-hint-label{font-family:var(--sans);letter-spacing:.02em;color:var(--rv-hint-ink);margin-bottom:6px;font-size:13px;font-weight:700;display:block}.article .eq-controls{flex-wrap:wrap;gap:10px;margin-top:16px;display:flex}.article .eq-btn{cursor:pointer;border:1.5px solid #0000;border-radius:12px;padding:9px 20px;font-family:inherit;font-size:13.5px;font-weight:600;transition:all .15s}.article .eq-submit-btn{background:var(--accent);width:100%;min-height:44px;color:var(--text-on-accent);border-color:var(--accent);border-radius:12px;justify-content:center;align-items:center;padding:12px 14px;font-size:14.5px;font-weight:700;display:flex}.article .eq-submit-btn:hover:not(:disabled){background:var(--accent-dark)}.article .eq-submit-btn:disabled{opacity:.5;cursor:default}.article .eq-hint-btn{background:var(--tip-bg);color:var(--tip-accent);border-color:var(--tip-border)}.article .eq-hint-btn:hover{background:var(--tip-bg)}@supports (color:color-mix(in lab, red, red)){.article .eq-hint-btn:hover{background:color-mix(in srgb, var(--tip-bg) 90%, var(--tip-accent))}}.article .eq-explain-btn{background:var(--bg);color:var(--accent);border-color:var(--accent-soft)}.article .eq-explain-btn:hover{background:var(--accent-bg)}.article .eq-redo-btn{background:var(--bg);color:var(--text-2);border-color:var(--border)}.article .eq-redo-btn:hover{background:var(--bg-soft)}.article .eq-reveal{border-top:1px dashed var(--border);flex-direction:column;gap:12px;margin-top:16px;padding-top:14px;display:flex}.article .eq-rv{border:1px solid var(--border);border-radius:10px;padding:11px 14px 12px}.article .eq-rv-label{font-family:var(--sans);letter-spacing:.02em;margin-bottom:7px;font-size:13px;font-weight:700;display:block}.article .eq-rv-body{color:var(--text);font-size:13px;line-height:1.7}.article .eq-rv-answer{background:var(--rv-ans-bg);border-color:var(--rv-ans-border)}.article .eq-rv-answer .eq-rv-label{color:var(--rv-ans-ink)}.article .eq-rv-answer .eq-rv-body{color:var(--text);letter-spacing:.04em;font-size:15px;font-weight:700}.article .eq-rv-explain{border-color:var(--border);background:#f7f6f2}.article .eq-rv-explain .eq-rv-label{color:var(--text-muted)}.article .eq-rv-explain .eq-rv-body{color:var(--text-2)}.article .eq-rv-insight{background:var(--rv-eye-bg);border-color:var(--rv-eye-border)}.article .eq-rv-insight .eq-rv-label{color:var(--rv-eye-ink)}.article .eq-rv-insight .eq-rv-body{color:var(--text)}.article .eq-meta{flex-wrap:wrap;align-items:center;gap:8px;margin-bottom:11px;display:flex}.article .eq-source{font-family:var(--sans);color:var(--text-muted);background:var(--chip-bg);white-space:nowrap;border-radius:6px;padding:3px 8px;font-size:11px;font-weight:600}.article .eq-difficulty{font-family:var(--sans);color:var(--accent);background:var(--accent-bg);white-space:nowrap;border-radius:6px;padding:3px 8px;font-size:11px;font-weight:600}.article .exam-quiz.compact{margin:14px 0;padding:14px 16px}.article .exam-quiz.compact .eq-stem{margin-bottom:12px;font-size:15px}.article .exam-quiz.compact .eq-options{gap:7px}.article .exam-quiz.compact .eq-opt{padding:9px 12px;font-size:14.5px}.article .exam-quiz.fillin .eq-controls{margin-top:12px}.article .exam-quiz.eq-flash{animation:1.6s eq-flash-kf}@keyframes eq-flash-kf{0%,to{border-color:var(--border);box-shadow:0 0 #d6454500}20%{border-color:var(--red);box-shadow:0 0 0 4px #d645452e}}.wrong-item .mi-source{background:var(--chip-bg);color:var(--text-muted);border-radius:6px;padding:3px 8px;font-size:11px;font-weight:600}.wrong-item .wq-time{color:var(--text-faint);font-size:11px}.wrong-item .wq-count{color:var(--red);background:var(--red-bg);border-radius:5px;margin-left:auto;padding:2px 7px;font-size:11px;font-weight:600}.wrong-item .wq-stem{margin:10px 0 0;padding-left:0;font-size:14.5px;line-height:1.7}.wrong-item .wq-meta{gap:10px;margin-top:12px;display:flex}.wrong-item .wq-chosen{background:#b5564e14;border-radius:10px;flex:1;padding:9px 12px}.wrong-item .wq-chosen .wq-label{color:var(--red);font-size:11px;display:block}.wrong-item .wq-chosen .wq-val{color:var(--red);margin-top:2px;font-size:15px;font-weight:700}.wrong-item .wq-answer{background:#6608740f;border-radius:10px;flex:1;padding:9px 12px}.wrong-item .wq-answer .wq-label{color:var(--accent);font-size:11px;display:block}.wrong-item .wq-answer .wq-val{color:var(--accent);margin-top:2px;font-size:15px;font-weight:700}.wrong-item .wq-actions{border-top:1px solid var(--border);justify-content:space-between;align-items:center;margin-top:13px;padding-top:13px;display:flex}.wq-btn{color:var(--text-subtle);cursor:pointer;background:0 0;border:none;padding:0;font-size:12.5px}.wq-btn.primary{color:var(--text-on-accent);background:var(--accent);cursor:pointer;border:none;border-radius:10px;padding:8px 16px;font-size:13px;font-weight:600}.wq-btn:hover{filter:brightness(.97)}.sec-flash{border-radius:6px;animation:1.6s sec-flash-kf}@keyframes sec-flash-kf{0%,to{background:0 0}25%{background:color-mix(in srgb, var(--accent) 14%, transparent)}}.article .feature-link{color:var(--accent-dark);border-bottom:1px solid var(--accent);font-weight:600;text-decoration:none}.article .feature-link:before{content:"↗ ";opacity:.7;font-size:.85em}.article .feature-link:hover{background:var(--bg-2,#faf4e6)}.jimu-ref{color:var(--accent);background:var(--accent-soft);cursor:pointer;white-space:nowrap;border:none;border-radius:8px;padding:3px 8px;font-size:12px;font-weight:600;transition:background .15s}.jimu-ref:hover{background:var(--accent-soft)}@supports (color:color-mix(in lab, red, red)){.jimu-ref:hover{background:color-mix(in srgb, var(--accent-soft) 80%, var(--accent))}}.jimu-ref.open{background:var(--accent);color:var(--text-on-accent)}.jimu-panel{border:1px solid var(--accent-soft);border-left:3px solid var(--accent);border-radius:var(--radius-md);background:var(--accent-bg);margin:10px 0 14px;padding:12px 16px 8px}.jimu-panel>h3{color:var(--accent-dark);font-size:16px;margin-top:4px!important}.jimu-panel>h3:first-child{margin-top:0!important}.jimu-close{border:1px solid var(--accent-soft);border-radius:var(--radius-sm);background:var(--bg-elev);color:var(--accent);cursor:pointer;margin-top:4px;padding:4px 12px;font-size:12.5px}.jimu-close:hover{background:var(--accent-bg)}.rq{margin:28px 0 8px}.rq-head{border-top:2px solid var(--border);justify-content:space-between;align-items:baseline;padding-top:16px;display:flex}.rq-title{font-family:var(--sans);color:var(--text-1);font-size:18px;font-weight:700}.rq-total{color:var(--text-2);font-size:13px}.rq-note{color:var(--text-3,var(--text-2));margin:6px 0 16px;font-size:12.5px;line-height:1.6}.rq-tier{border:1px solid var(--border);border-radius:var(--radius-md);box-shadow:var(--shadow-sm);margin-bottom:16px;overflow:hidden}.rq-tier-head{background:var(--bg-2,#faf8f4);border-bottom:1px solid var(--border);align-items:center;gap:8px;padding:10px 14px;font-size:13.5px;display:flex}.rq-tier-dot{border-radius:50%;flex-shrink:0;width:9px;height:9px}.rq-tier-label{color:var(--text-1);font-weight:700}.rq-tier-school{color:var(--text-2);font-size:12px}.rq-tier-count{color:var(--text-2);margin-left:auto;font-size:12px}.rq-easy .rq-tier-dot{background:var(--accent)}.rq-mid .rq-tier-dot{background:var(--tip-accent)}.rq-hard .rq-tier-dot{background:var(--red)}.rq-easy .rq-tier-head{background:var(--accent-soft)}.rq-mid .rq-tier-head{background:var(--tip-bg)}.rq-hard .rq-tier-head{background:var(--warn-bg)}.rq-q{border-top:1px solid var(--border);padding:13px 14px}.rq-q:first-of-type{border-top:none}.rq-q-head{align-items:center;gap:8px;margin-bottom:7px;display:flex}.rq-src{color:var(--text-muted);background:var(--chip-bg);border-radius:6px;padding:3px 8px;font-size:11px;font-weight:600}.rq-type{color:var(--accent);background:var(--accent-bg);border-radius:6px;padding:3px 8px;font-size:11px;font-weight:600}.rq-stem{color:var(--text-1);font-size:14.5px;line-height:1.75}.rq-stem p{margin:.3em 0}.rq-reveal-btn{border:1px solid var(--border);background:var(--bg-elev);color:var(--text-2);cursor:pointer;border-radius:8px;margin-top:10px;padding:6px 14px;font-size:13px;font-weight:600}.rq-reveal-btn:hover{filter:brightness(.97)}.rq-reveal{flex-direction:column;gap:10px;margin-top:10px;display:flex}.rq-rv{border:1px solid var(--border);border-radius:10px;margin:0;padding:11px 14px 12px}.rq-rv-label{font-family:var(--sans);letter-spacing:.02em;color:var(--text-2);margin-bottom:7px;font-size:13px;font-weight:700;display:block}.rq-rv-body{color:var(--text);font-size:14.5px;line-height:1.75}.rq-rv-body p{margin:.6em 0}.rq-rv-body p:first-child{margin-top:0}.rq-rv-body p:last-child{margin-bottom:0}.rq-rv-body ul,.rq-rv-body ol{margin:.55em 0;padding-left:1.5em}.rq-rv-body li{margin:.3em 0}.rq-rv-body strong{color:var(--text-1);font-weight:700}.rq-rv-body .katex-display{margin:.8em 0;padding:2px 0;overflow:auto hidden}.rq-rv-body hr{border:none;border-top:1px dashed var(--border);margin:14px 0 12px}.rq-rv-body hr+p{color:var(--accent-dark);margin-bottom:.4em;font-weight:700}.rq-rv-body blockquote{border-left:3px solid var(--accent);background:var(--rv-eye-bg);color:var(--text-2);border-radius:0 8px 8px 0;margin:14px 0 0;padding:9px 12px;font-size:13px;line-height:1.7}.rq-rv-body blockquote p{margin:0}.rq-ans{background:var(--rv-ans-bg);border-color:var(--rv-ans-border)}.rq-ans .rq-rv-label{color:var(--rv-ans-ink)}.rq-ans .rq-rv-body{font-weight:600}.rq-sol{background:var(--rv-exp-bg);border-color:var(--rv-exp-border)}.rq-sol .rq-rv-label{color:var(--rv-exp-ink)}.rq-more{border:none;border-top:1px dashed var(--border);background:var(--bg-elev);width:100%;color:var(--accent-dark);cursor:pointer;padding:9px;font-size:13px;font-weight:600;display:block}.rq-more:hover{background:var(--bg-2,#faf8f4)}.figplot{margin:10px 0}.figplot[data-hydrated]{-webkit-user-select:none;user-select:none;flex-wrap:wrap;align-items:flex-start;gap:16px;display:flex}.figplot svg{cursor:crosshair;touch-action:none;display:block}.figplot-left{flex:300px;min-width:260px;max-width:480px}.figplot-readout{color:var(--text-2);background:var(--bg-soft);border-radius:10px;min-height:20px;margin-top:8px;padding:7px 12px;font-size:13px}.figplot-readout b{color:var(--accent);font-weight:600}.figplot-badge{background:var(--accent-soft);color:var(--accent);border-radius:var(--radius-pill);padding:1px 9px;font-size:11px;font-weight:600}.figplot-panel{background:var(--bg-soft);border-radius:12px;flex:0 0 150px;padding:10px 12px;font-size:13px}.figplot-pt{color:var(--text-muted);letter-spacing:.05em;margin:0 0 6px;font-size:11px}.figplot-panel label{cursor:pointer;color:var(--text-1);align-items:center;gap:7px;padding:3.5px 0;display:flex}.figplot-panel input{accent-color:var(--accent)}.figplot-expr{border-top:1px solid var(--border);margin-top:8px;padding-top:8px}.figplot-expr-head{color:var(--text-muted);margin-bottom:2px;font-size:12px}.figplot-expr-line{color:var(--text-2);border-radius:8px;margin:1px 0;padding:2px 8px;font-size:12.5px}.figplot-expr-line.on{background:var(--accent-soft);color:var(--accent);font-weight:600}.cd-banner{background:linear-gradient(135deg, var(--tip-accent), var(--tip-accent-dark));border-radius:14px;margin:0 0 28px;padding:16px 18px}@supports (color:color-mix(in lab, red, red)){.cd-banner{background:linear-gradient(135deg, color-mix(in srgb, var(--tip-accent) 3%, transparent), color-mix(in srgb, var(--tip-accent-dark) 8%, transparent))}}.cd-banner{border:1px solid var(--tip-border)}.cd-banner.cd-done{background:var(--bg-elev)}.cd-banner.cd-setup{background:var(--bg-elev);border-color:var(--border)}.cd-main{cursor:pointer;align-items:baseline;gap:10px;display:flex;position:relative}.cd-text{color:var(--text-2);font-size:14px}.cd-text b{color:var(--text-1);font-weight:700}.cd-num{font-family:var(--sans);color:var(--tip-accent-dark);letter-spacing:-1px;font-size:40px;font-weight:800;line-height:1}.cd-unit{color:var(--text-2);margin-left:4px;font-size:16px;font-weight:600}.cd-num.cd-today{font-size:22px}.cd-edit{border:1px solid var(--border);background:var(--bg-elev);color:var(--text-2);cursor:pointer;border-radius:999px;align-self:center;margin-left:auto;padding:5px 12px;font-size:12.5px}.cd-setup-head{color:var(--text-2);margin-bottom:14px;font-size:14px}.cd-setup-head b{color:var(--accent-dark);font-weight:700}.cd-picker{flex-direction:column;gap:10px;margin-top:12px;display:flex}.cd-picker-row{flex-wrap:wrap;align-items:center;gap:8px;display:flex}.cd-picker-label{color:var(--text-3,var(--text-2));margin-right:2px;font-size:12.5px}.cd-setup .cd-chip{background:var(--bg)}.cd-chip{border:1px solid var(--border);background:var(--bg-elev);color:var(--text-1);cursor:pointer;border-radius:999px;padding:7px 16px;font-size:14px;font-weight:600}.cd-chip--sm{padding:6px 12px;font-size:13px}.cd-chip.active{background:var(--accent);border-color:var(--accent);color:var(--text-on-accent)}.tt-block{margin-top:18px}.tt-count{color:var(--text-2);font-size:12.5px}.tt-head-right{align-items:center;gap:10px;display:inline-flex}.tt-streak{color:var(--text-3,var(--text-2));border-radius:var(--radius-pill);background:var(--bg-elev);border:1px solid var(--border);padding:2px 8px;font-size:12px;font-weight:700}.tt-streak.is-active{color:var(--tip-accent);border-color:var(--tip-border);background:var(--tip-bg)}.tt-empty{border-radius:var(--radius-md);background:var(--bg-elev);border:1px solid var(--border);color:var(--text-2);text-align:center;box-shadow:var(--shadow-sm);padding:18px;font-size:14px}.tt-list{flex-direction:column;gap:14px;display:flex}.tt-group{border:1px solid var(--border-soft);border-radius:var(--radius-md);background:var(--bg-elev);box-shadow:var(--shadow-md);overflow:hidden}.tt-group-head{color:var(--text-1);background:var(--bg-soft);border-bottom:1px solid var(--border-soft);justify-content:space-between;align-items:center;padding:10px 14px;font-size:13px;font-weight:700;display:flex}.tt-pace{color:var(--text-2);align-items:center;gap:6px;font-size:12px;font-weight:500;display:inline-flex}.tt-pace-btn,.tt-pace-auto{border-radius:var(--radius-sm);border:1px solid var(--border);background:var(--bg-elev);cursor:pointer;width:36px;height:36px;color:var(--text-2);font-size:13px;line-height:1}.tt-pace-auto{width:auto;padding:0 10px;font-size:11.5px}.tt-item{border-top:1px solid var(--border-soft);color:var(--text-1);align-items:center;gap:10px;padding:11px 14px;text-decoration:none;display:flex}.tt-group .tt-item:first-of-type{border-top:none}.tt-tag{border-radius:var(--radius-sm);flex-shrink:0;padding:2px 8px;font-size:11.5px;font-weight:700}.tt-new{background:var(--green-bg);color:var(--green)}.tt-r-dontknow{background:var(--warn-bg);color:var(--red)}.tt-r-confused{background:var(--tip-bg);color:var(--tip-accent)}.tt-r-wrong{background:var(--warn-bg);color:var(--red)}.tt-item-name{cursor:pointer;text-align:left;color:inherit;background:0 0;border:none;flex:1;padding:0;font-family:inherit;font-size:14.5px}.tt-domain{color:var(--text-3,var(--text-2));flex-shrink:0;font-size:11.5px}.tt-arrow{color:var(--text-3,var(--text-2))}.tt-go,.tt-done{border-radius:var(--radius-sm);border:1px solid var(--border);background:var(--bg-elev);cursor:pointer;color:var(--text-2);flex-shrink:0;padding:5px 11px;font-size:12.5px;font-weight:600}.tt-done{background:var(--green-bg);border-color:var(--green-bg);color:var(--green)}.tt-remain{color:var(--text-2);border-top:1px dashed var(--border);padding:8px 14px;font-size:12px}.acad-tier{border:1px solid var(--border);background:var(--bg-elev);box-shadow:var(--shadow-lg);border-radius:20px;margin:16px 0;padding:20px 18px}.acad-tier-head{justify-content:space-between;align-items:baseline;display:flex}.acad-tier-label{color:var(--text-muted);font-size:13px}.acad-tier-pct{font-family:var(--sans);color:var(--accent);font-size:26px;font-weight:700}.acad-tier-now{font-family:var(--sans);color:var(--text);margin-top:8px;font-size:30px;font-weight:700}.acad-tier-schools{color:var(--text-subtle);margin-top:2px;font-size:13px}.acad-tier-bar{background:#00000012;border-radius:4px;height:8px;margin:16px 0 6px;overflow:hidden}.acad-tier-fill{background:var(--accent);border-radius:4px;height:100%}.acad-tier-next{color:var(--text-muted);margin-top:12px;font-size:13.5px;font-weight:600}.acad-tier-note{color:var(--text-faint);margin-top:5px;font-size:11.5px}.acad-goal{border-top:1px dashed var(--border-strong);margin-top:14px;padding-top:12px}.acad-goal-label{color:var(--text-muted);margin-bottom:10px;font-size:13px}.acad-goal-chips{flex-wrap:wrap;gap:8px;display:flex}.acad-goal-chip{border:1px solid var(--border-strong);color:var(--text);cursor:pointer;background:0 0;border-radius:20px;padding:7px 14px;font-size:13px;font-weight:500}.acad-goal-chip.active{background:var(--accent);border:1px solid var(--accent);color:var(--text-on-accent);padding:7px 16px;font-weight:600}.acad-goal-gap{color:var(--text-muted);margin-top:14px;font-size:13px;line-height:1.6}.acad-goal-gap b{color:var(--tip-accent);font-weight:800}.acad-goal-gap.reached{color:var(--green);font-weight:600}.acad-goal-gap.reached b{color:var(--green)}.acad-radar{flex-direction:column;gap:9px;display:flex}.acad-dom{align-items:center;gap:10px;display:flex}.acad-dom-name{width:7.5em;color:var(--text-1);text-overflow:ellipsis;white-space:nowrap;flex-shrink:0;font-size:13.5px;overflow:hidden}.acad-dom-bar{background:var(--bg-soft);border-radius:4px;flex:1;height:8px;overflow:hidden}.acad-dom-fill{background:var(--accent);border-radius:4px;height:100%}.acad-dom.is-weak .acad-dom-fill{background:var(--tip-accent)}.acad-dom.is-weak .acad-dom-name{color:var(--tip-accent);font-weight:600}.acad-dom-pct{text-align:right;width:3.2em;color:var(--text-2);flex-shrink:0;font-size:12.5px}.acad-insights{flex-direction:column;gap:8px;display:flex}.acad-insight{background:var(--bg-elev);border:1px solid var(--border);border-radius:10px;align-items:flex-start;gap:10px;padding:10px 12px;display:flex}.acad-insight-count{background:var(--warn-bg);min-width:24px;height:24px;color:var(--red);border-radius:7px;flex-shrink:0;justify-content:center;align-items:center;padding:0 6px;font-size:13px;font-weight:800;display:inline-flex}.acad-insight-text{color:var(--text-1);font-size:14px;line-height:1.5}.mi-note{color:var(--text-2);background:0 0;border:none;border-left:2px solid #b07b3e66;margin:9px 0 0;padding:0 0 0 12px;font-size:13.5px;line-height:1.7}.qsheet{padding:4px 2px 8px}.qsheet-section{font-family:var(--sans);color:var(--text-2);margin-bottom:12px;font-size:14px;font-weight:600}.qsheet-input{box-sizing:border-box;border:1.5px solid var(--border);width:100%;color:var(--text);background:var(--bg);resize:vertical;border-radius:10px;min-height:110px;padding:12px 14px;font-family:inherit;font-size:15px;line-height:1.6}.qsheet-input:focus{border-color:var(--accent);box-shadow:0 0 0 3px var(--accent);outline:none}@supports (color:color-mix(in lab, red, red)){.qsheet-input:focus{box-shadow:0 0 0 3px color-mix(in srgb, var(--accent) 15%, transparent)}}.qsheet-actions{gap:10px;margin-top:14px;display:flex}.qsheet-btn{cursor:pointer;border:1.5px solid #0000;border-radius:9px;flex:1;padding:11px;font-family:inherit;font-size:14.5px;font-weight:600;transition:all .15s}.qsheet-btn.primary{background:var(--accent);color:var(--text-on-accent)}.qsheet-btn.primary:hover{background:var(--accent-dark)}.qsheet-btn.secondary{background:var(--bg);color:var(--text-2);border-color:var(--border)}.qsheet-btn.secondary:hover{background:var(--bg-soft)}.qsheet-hint{color:var(--text-subtle);text-align:center;margin-top:10px;font-size:12.5px}.callout.c-tip{border-color:var(--green);background:var(--green-bg)}.callout.c-tip .callout-title{color:var(--green)}.callout.c-warning{border-color:var(--red);background:var(--red-bg)}.callout.c-warning .callout-title{color:var(--red)}.callout.c-note{border-color:var(--blue);background:#4a6b8f14}.callout.c-note .callout-title{color:var(--blue)}.callout.c-example{border-color:var(--accent);background:var(--accent-bg)}.callout.c-example .callout-title{color:var(--accent-dark)}.callout.c-think{border-color:var(--tip-accent-dark);background:var(--tip-bg-think)}.callout.c-think .callout-title{color:var(--tip-accent-dark)}.challenge-card{background:var(--bg-elev);border:1px solid var(--border);border-radius:10px;margin:28px 0;padding:20px}.challenge-label{color:var(--accent-dark);text-transform:uppercase;letter-spacing:.06em;margin-bottom:10px;font-size:12px;font-weight:600}.challenge-stem{color:var(--text);margin-bottom:16px;font-size:15.5px;font-weight:500;line-height:1.7}.challenge-opts{flex-direction:column;gap:8px;margin-bottom:12px;display:flex}.challenge-opt{border:1px solid var(--border);background:var(--bg-elev);cursor:pointer;border-radius:8px;align-items:baseline;gap:8px;padding:10px 14px;font-size:13.5px;line-height:1.6;transition:all .15s;display:flex}.challenge-opt:hover:not(.disabled),.challenge-opt.selected{border-color:var(--accent);background:var(--accent-bg)}.challenge-opt .opt-label{border:1.5px solid var(--border-strong);width:22px;height:22px;color:var(--text-2);background:var(--bg-elev);border-radius:50%;flex-shrink:0;justify-content:center;align-items:center;font-size:12px;font-weight:700;transition:all .15s;display:inline-flex}.challenge-opt.selected .opt-label{border-color:var(--accent);background:var(--accent);color:var(--text-on-accent)}.challenge-opt.correct{border-color:var(--green);background:var(--green-bg)}.challenge-opt.correct .opt-label{border-color:var(--green);background:var(--green);color:var(--text-on-accent)}.challenge-opt.disabled{pointer-events:none;opacity:.5}.challenge-actions{flex-wrap:wrap;gap:10px;margin-top:14px;display:flex}.challenge-btn{cursor:pointer;border:1.5px solid #0000;border-radius:12px;padding:9px 20px;font-size:13.5px;font-weight:600;transition:all .15s}.challenge-btn.primary{background:var(--accent);width:100%;min-height:44px;color:var(--text-on-accent);border-color:var(--accent);border-radius:12px;justify-content:center;align-items:center;padding:12px 14px;font-size:14.5px;font-weight:700;display:flex}.challenge-btn.primary:hover{background:var(--accent-dark);border-color:var(--accent-dark)}.challenge-btn.primary:disabled{opacity:.4;cursor:default}.challenge-btn.secondary{background:var(--bg-elev);color:var(--tip-accent-dark);border-color:var(--border)}.challenge-btn.secondary:hover{background:var(--tip-bg-think);border-color:var(--tip-accent-dark)}.challenge-btn.secondary:disabled{opacity:.4;cursor:default}.challenge-hints{margin-top:12px}.challenge-hint{background:var(--rv-hint-bg);border:1px solid var(--rv-hint-border);color:var(--text);border-radius:10px;margin-bottom:8px;padding:11px 14px 12px;font-size:13px;line-height:1.7;display:none}.challenge-hint.visible{display:block}.challenge-hint-label{font-family:var(--sans);color:var(--rv-hint-ink);letter-spacing:.02em;margin-bottom:6px;font-size:13px;font-weight:700}.challenge-result{margin-top:10px;font-size:14px;font-weight:500;display:none}.challenge-result.visible{display:block}.challenge-result.success{color:var(--green)}.challenge-result.fail{color:var(--text-muted)}.challenge-explanation{background:var(--rv-exp-bg);border:1px solid var(--rv-exp-border);color:var(--text);border-radius:10px;margin-top:14px;padding:11px 14px 12px;font-size:13px;line-height:1.7;display:none}.challenge-explanation.visible{display:block}.challenge-explanation-label{font-family:var(--sans);color:var(--rv-exp-ink);letter-spacing:.02em;margin-bottom:6px;font-size:13px;font-weight:700}.h3-marks{float:right;gap:4px;margin-top:2px;margin-left:8px;display:inline-flex}.h3-marks .mark-btn{padding:3px 8px;font-size:10.5px}.backlinks-card{background:var(--bg-elev,#fff);border:1px solid var(--border-soft,#ecebe7);border-radius:10px;margin:36px 0 0;padding:4px 20px;transition:padding .18s}.backlinks-card.is-open{padding:18px 20px 16px}.backlinks-label{width:100%;color:var(--text-2,#888);cursor:pointer;text-align:left;background:0 0;border:none;align-items:center;gap:8px;padding:12px 0;font-size:12.5px;font-weight:600;display:flex}.backlinks-card.is-open .backlinks-label{padding-bottom:12px}.backlinks-label:hover{color:var(--text)}.backlinks-label:before{content:"↗";opacity:.5;font-size:14px}.backlinks-count{background:var(--bg-soft,#f5f4f1);color:var(--text-2,#888);border-radius:999px;margin-left:2px;padding:1px 8px;font-size:11px;font-weight:500}.backlinks-toggle{color:var(--accent);opacity:.85;margin-left:auto;font-size:11.5px;font-weight:500}.backlinks-list{flex-direction:column;gap:1px;margin:0;padding:0;list-style:none;display:flex}.backlink-item{margin:0}.backlink-link{color:inherit;border-radius:6px;padding:10px 12px;text-decoration:none;transition:background .12s;display:block}.backlink-link:hover{background:var(--bg-soft,#f5f4f1)}.backlink-head{align-items:baseline;gap:8px;margin-bottom:4px;display:flex}.backlink-name{color:var(--text);font-size:14px;font-weight:500}.backlink-tag{background:var(--accent-bg);color:var(--accent);letter-spacing:.02em;border-radius:3px;padding:1px 6px;font-size:10.5px;font-weight:500}.backlink-snippet{color:var(--text-2,#888);word-break:break-word;font-size:12.5px;line-height:1.55}.backlink-chip{background:var(--bg-soft);color:var(--accent-dark);cursor:pointer;border-radius:5px;padding:4px 10px;font-size:13px;transition:background .15s;display:inline-block}.backlink-chip:hover{background:var(--accent-soft)}.coll-tabs{border-bottom:1.5px solid var(--border-soft);gap:0;margin-bottom:18px;display:flex}.coll-tab{color:var(--text-muted);cursor:pointer;border-bottom:2px solid #0000;margin-bottom:-1.5px;padding:8px 14px;font-size:13.5px;font-weight:500;transition:all .15s}.coll-tab:hover{color:var(--text)}.coll-tab.active{color:var(--accent-dark);border-bottom-color:var(--accent);font-weight:600}.coll-tab .tab-count{color:var(--text-subtle);margin-left:4px;font-size:11px}.coll-tab.active .tab-count{color:var(--accent)}.login-shell{padding:0 0 calc(22px + var(--safe-b));min-height:calc(100dvh - var(--header-h) - var(--safe-t));flex-direction:column;display:flex}.login-brand{flex-direction:column;align-items:center;margin-top:48px;display:flex}.login-brand-mark{background:var(--accent);width:60px;height:60px;color:var(--text-on-accent);font-family:var(--sans);box-shadow:var(--shadow-accent-mark);border-radius:18px;justify-content:center;align-items:center;font-size:30px;font-weight:700;display:flex}.login-brand-name{font-family:var(--sans);letter-spacing:.04em;color:var(--text);margin-top:16px;font-size:26px;font-weight:700}.login-brand-slogan{letter-spacing:.16em;color:var(--text-soft);margin-top:4px;font-size:11px}.login-title{font-family:var(--sans);letter-spacing:-.01em;color:var(--text);margin:20px 0 0;font-size:25px;font-weight:700;line-height:1.4}.login-sub{font-family:var(--sans);color:var(--text-muted);margin:14px 0 0;font-size:14px;line-height:1.75}.login-chip{background:var(--accent-soft);border-radius:20px;align-items:center;gap:7px;margin-top:16px;padding:8px 14px;display:inline-flex}.login-chip-dot{background:var(--accent);border-radius:50%;width:6px;height:6px}.login-chip-text{color:var(--accent);font-size:12.5px;font-weight:600}.login-tabs{border-bottom:1.5px solid #00000014;margin-bottom:16px;display:flex}.login-tab{font-family:var(--sans);color:var(--text-faint);cursor:pointer;background:0 0;border:none;flex:1;padding:12px 0;font-size:14.5px;font-weight:600;transition:color .14s;position:relative}.login-tab--active{color:var(--accent)}.login-tab--active:after{content:"";background:var(--accent);border-radius:2px;height:2px;position:absolute;bottom:-1.5px;left:0;right:0}.login-form{flex-direction:column;margin-top:32px;display:flex}.login-field{position:relative}.login-input{background:var(--bg-elev);width:100%;min-height:48px;font-family:var(--sans);color:var(--text);border:1px solid #0000001a;border-radius:13px;outline:none;padding:14px 16px;font-size:14.5px;transition:border-color .16s}.login-input::placeholder{color:var(--text-faint)}.login-input:focus{border-color:var(--accent);outline:none}.login-code-row{gap:10px;margin-top:11px;display:flex}.login-code-row .login-input{flex:1;min-width:0}.login-code-btn{min-height:48px;color:var(--accent);border:1.5px solid var(--accent-border);white-space:nowrap;cursor:pointer;background:0 0;border-radius:13px;flex-shrink:0;padding:0 16px;font-size:13.5px;font-weight:600;transition:all .14s}.login-code-btn:hover:not(:disabled){background:var(--accent-bg)}.login-code-btn:disabled{opacity:.45;cursor:default}.login-error{color:var(--red);padding:4px 2px;font-size:13.5px}.login-submit-btn{background:var(--accent);width:100%;min-height:48px;color:var(--text-on-accent);cursor:pointer;box-shadow:var(--shadow-accent-soft);border:none;border-radius:14px;margin-top:16px;padding:16px;font-size:16px;font-weight:700;transition:background .14s}.login-submit-btn:hover{background:var(--accent-dark)}.login-submit-btn:active{transform:scale(.98)}.login-wechat{width:100%;min-height:48px;color:var(--wechat);border:1px solid var(--border-strong);cursor:pointer;background:0 0;border-radius:14px;justify-content:center;align-items:center;gap:9px;margin-top:12px;padding:14px;font-size:14.5px;font-weight:600;transition:background .14s;display:flex}.login-wechat .dk-icon{width:19px;height:19px}.login-wechat:hover{background:#3a7a4a0d}.login-footer{text-align:center;color:var(--text-faint);margin-top:auto;padding:26px 0;font-size:11.5px;line-height:1.7}.login-link{color:var(--accent-dark);border-bottom:1px solid var(--accent-soft);padding-bottom:1px;transition:color .14s,border-color .14s}.login-link:hover{color:var(--accent);border-bottom-color:var(--accent)}.paywall{margin-top:-20px;position:relative}.paywall-fade{pointer-events:none;background:linear-gradient(to bottom, transparent, var(--bg-elev));height:120px;margin-bottom:-1px}.paywall-card{background:var(--bg-elev);border-top:1px solid var(--border-soft);border-radius:var(--radius-lg) var(--radius-lg) 0 0;text-align:center;flex-direction:column;align-items:center;gap:16px;padding:36px 28px 40px;display:flex}.paywall-icon{background:var(--accent-bg);border-radius:50%;place-items:center;width:56px;height:56px;display:grid}.paywall-text{max-width:280px}.paywall-heading{font-family:var(--sans);color:var(--text);letter-spacing:-.01em;margin:0 0 6px;font-size:20px;font-weight:600}.paywall-desc{color:var(--text-muted);margin:0 0 10px;font-size:14.5px;line-height:1.6}.paywall-term{color:var(--accent-dark);background:var(--accent-bg);border:1px solid var(--accent-soft);border-radius:var(--radius-pill);padding:4px 12px;font-size:12px;font-weight:600;display:inline-block}.paywall-btn{background:var(--accent);width:100%;max-width:320px;min-height:48px;color:var(--text-on-accent);border-radius:var(--radius-md);cursor:pointer;border:none;padding:14px 24px;font-size:15px;font-weight:600;transition:background .14s;box-shadow:0 4px 14px #66087447}.paywall-btn:hover{background:var(--accent-dark)}.paywall-btn:active{transform:scale(.98)}.paywall-hint{color:var(--text-muted);margin:0;font-size:12.5px}.paywall-link{color:var(--accent-dark);font-weight:500}.paywall-link:hover{color:var(--accent)}.paywall-later{color:var(--text-muted);border-radius:var(--radius-sm);padding:6px 12px;font-size:13px;text-decoration:none;transition:color .14s,background .14s}.paywall-later:hover{color:var(--text);background:var(--bg-soft)}.admin-shell{background:var(--bg);min-height:100vh;display:flex}.admin-shell.collapsed .admin-sidebar{width:64px}.admin-shell.collapsed .admin-sidebar-brand{justify-content:center;padding:18px 0}.admin-shell.collapsed .admin-nav-item{justify-content:center;padding:12px 0}.admin-shell.collapsed .admin-nav-group-label{display:none}.admin-shell.collapsed .admin-sidebar-footer{justify-content:center}.admin-sidebar{background:var(--bg-elev);border-right:1px solid var(--border-soft);flex-direction:column;flex-shrink:0;width:232px;transition:width .2s;display:flex}.admin-sidebar-brand{border-bottom:1px solid var(--border-soft);align-items:center;gap:11px;padding:22px 20px;display:flex}.admin-sidebar-mark{background:var(--accent);width:32px;height:32px;color:var(--text-on-accent);font-family:var(--sans);border-radius:8px;flex-shrink:0;place-items:center;font-size:15px;font-weight:700;display:grid}.admin-sidebar-title{font-family:var(--sans);white-space:nowrap;color:var(--text);letter-spacing:-.01em;font-size:15px;font-weight:600}.admin-nav{flex:1;padding:8px 0;overflow-y:auto}.admin-nav-group{margin-bottom:4px}.admin-nav-group-label{color:var(--text-subtle);text-transform:uppercase;letter-spacing:.06em;padding:10px 20px 4px;font-size:11px;font-weight:600}.admin-nav-item{color:var(--text-muted);cursor:pointer;border-radius:0;align-items:center;gap:10px;padding:10px 20px;font-size:14px;text-decoration:none;transition:color .12s,background .12s;display:flex;position:relative}.admin-nav-item:hover{color:var(--text);background:var(--bg-soft)}.admin-nav-item.active{color:var(--accent-dark);background:var(--accent-bg);font-weight:500}.admin-nav-item.active:before{content:"";background:var(--accent);border-radius:0 2px 2px 0;width:3px;position:absolute;top:0;bottom:0;left:0}.admin-nav-icon{text-align:center;flex-shrink:0;width:20px;font-size:16px}.admin-nav-label{white-space:nowrap}.admin-sidebar-footer{border-top:1px solid var(--border-soft);justify-content:space-between;align-items:center;gap:8px;padding:14px 20px;display:flex}.admin-sidebar-user{color:var(--text-subtle);text-overflow:ellipsis;white-space:nowrap;font-size:12px;overflow:hidden}.admin-sidebar-logout{border:1px solid var(--border-soft);color:var(--text-muted);cursor:pointer;background:0 0;border-radius:7px;padding:4px 10px;font-size:12px;transition:all .12s}.admin-sidebar-logout:hover{color:var(--text);border-color:var(--border);background:var(--bg-soft)}.admin-main{flex-direction:column;flex:1;min-width:0;display:flex}.admin-topbar{background:var(--bg-elev);border-bottom:1px solid var(--border-soft);flex-shrink:0;align-items:center;gap:12px;height:54px;padding:0 24px;display:flex}.admin-collapse-btn{color:var(--text-muted);cursor:pointer;background:0 0;border:none;border-radius:6px;justify-content:center;align-items:center;min-width:32px;min-height:32px;padding:6px 10px;font-size:16px;transition:background .12s;display:flex}.admin-collapse-btn:hover{background:var(--bg-soft);color:var(--text)}.admin-topbar-title{font-family:var(--sans);color:var(--text);letter-spacing:-.01em;margin:0;font-size:16px;font-weight:600}.admin-content{background:var(--bg);flex:1;padding:28px 32px;overflow-y:auto}.admin-login-shell{background:var(--bg);place-items:center;min-height:100vh;display:grid}.admin-login-card{background:var(--bg-elev);border:1px solid var(--border-soft);border-radius:14px;width:380px;padding:44px 38px;box-shadow:0 4px 24px #0000000f}.admin-login-brand{align-items:center;gap:11px;margin-bottom:32px;display:flex}.admin-login-mark{background:var(--accent);width:36px;height:36px;color:var(--text-on-accent);font-family:var(--sans);border-radius:9px;place-items:center;font-size:17px;font-weight:700;display:grid}.admin-login-title{font-family:var(--sans);color:var(--text);letter-spacing:-.01em;font-size:19px;font-weight:600}.admin-login-form{flex-direction:column;gap:14px;display:flex}.admin-login-input{background:var(--bg);border:1.5px solid var(--border-soft);width:100%;font-family:var(--sans);color:var(--text);border-radius:10px;outline:none;padding:13px 16px;font-size:15px;transition:border-color .14s,background .14s}.admin-login-input::placeholder{color:var(--text-subtle)}.admin-login-input:focus{border-color:var(--accent);background:var(--bg-elev)}.admin-login-error{color:var(--red);padding:2px 0;font-size:13px}.admin-login-btn{background:var(--accent);width:100%;color:var(--text-on-accent);cursor:pointer;border:none;border-radius:10px;margin-top:2px;padding:14px;font-size:15px;font-weight:600;transition:background .14s}.admin-login-btn:hover{background:var(--accent-dark)}.admin-login-btn:active{transform:scale(.985)}.admin-page-narrow{max-width:560px}.admin-page-title{font-family:var(--sans);color:var(--text);letter-spacing:-.022em;font-variation-settings:"opsz" 48;margin:0 0 24px;font-size:clamp(22px,3.5vw,28px);font-weight:600}.admin-page-header{justify-content:space-between;align-items:center;margin-bottom:24px;display:flex}.admin-page-loading{color:var(--text-muted);text-align:center;padding:48px 0;font-size:14px}.admin-cards{grid-template-columns:repeat(auto-fit,minmax(210px,1fr));gap:16px;margin-bottom:32px;display:grid}.admin-stat-card{background:var(--bg-elev);border:1px solid var(--border-soft);border-radius:11px;align-items:center;gap:16px;padding:22px;transition:box-shadow .14s;display:flex}.admin-stat-card:hover{box-shadow:0 2px 12px #0000000d}.admin-stat-icon{background:var(--accent-bg);width:44px;height:44px;color:var(--accent-dark);border-radius:11px;flex-shrink:0;place-items:center;font-size:18px;display:grid}.admin-stat-value{font-family:var(--sans);color:var(--text);letter-spacing:-.02em;font-size:28px;font-weight:600;line-height:1.1}.admin-stat-label{color:var(--text-muted);margin-top:3px;font-size:13px}.admin-stat-sub{color:var(--accent-dark);font-weight:500}.admin-section{background:var(--bg-elev);border:1px solid var(--border-soft);border-radius:11px;padding:22px}.admin-section-title{font-family:var(--sans);color:var(--text);letter-spacing:-.01em;margin:0 0 16px;font-size:17px;font-weight:600}.admin-table{border-collapse:collapse;background:var(--bg-elev);border:1px solid var(--border-soft);border-radius:11px;width:100%;font-size:13.5px;overflow:hidden}.admin-table th{background:var(--bg-soft);text-align:left;color:var(--text-muted);text-transform:uppercase;letter-spacing:.04em;border-bottom:1px solid var(--border-soft);white-space:nowrap;z-index:1;padding:11px 16px;font-size:12px;font-weight:600;position:sticky;top:0}.admin-table td{border-bottom:1px solid var(--border-soft);color:var(--text-2);vertical-align:middle;padding:11px 16px}.admin-table tr:last-child td{border-bottom:none}.admin-table tr:hover td{background:#00000006}.admin-cell-amount{font-variant-numeric:tabular-nums;text-align:right;white-space:nowrap;font-weight:500}.admin-table-empty{text-align:center;color:var(--text-subtle);padding:40px 0;font-size:14px}.admin-badge{border-radius:6px;padding:2px 9px;font-size:12px;font-weight:500;display:inline-block}.admin-badge-free{background:var(--green-bg);color:var(--green)}.admin-badge-paid{background:var(--accent-bg);color:var(--accent-dark)}.admin-badge-active{background:var(--green-bg);color:var(--green)}.admin-badge-inactive{background:var(--bg-soft);color:var(--text-subtle)}.admin-badge-pending{background:var(--tip-bg);color:var(--tip-accent)}.admin-badge-failed{background:var(--red-bg);color:var(--red)}.admin-badge-refunded,.admin-badge-neutral{background:var(--bg-soft);color:var(--text-muted)}.admin-badge-gap{margin-left:5px}.admin-toolbar{flex-wrap:wrap;align-items:center;gap:10px;margin-bottom:18px;display:flex}.admin-select{border:1.5px solid var(--border-soft);background:var(--bg-elev);color:var(--text);border-radius:9px;outline:none;padding:8px 14px;font-size:13px;transition:border-color .14s}.admin-select:focus{border-color:var(--accent)}.admin-select-sm{max-width:180px;padding:5px 9px;font-size:12px}.admin-search-input{border:1.5px solid var(--border-soft);background:var(--bg-elev);width:220px;color:var(--text);border-radius:9px;outline:none;padding:8px 14px;font-size:13px;transition:border-color .14s}.admin-search-input:focus{border-color:var(--accent)}.admin-toolbar-info{color:var(--text-subtle);margin-left:auto;font-size:13px}.admin-btn{border:1.5px solid var(--border-soft);background:var(--bg-elev);color:var(--text);cursor:pointer;border-radius:9px;padding:8px 16px;font-size:13px;font-weight:500;transition:all .12s}.admin-btn:hover{background:var(--bg-soft);border-color:var(--border)}.admin-btn:disabled{cursor:not-allowed;opacity:.45}.admin-btn:disabled:hover{background:var(--bg-elev);border-color:var(--border-soft)}.admin-btn-sm{padding:5px 11px;font-size:12px}.admin-btn-primary{background:var(--accent);color:var(--text-on-accent);border-color:var(--accent)}.admin-btn-primary:hover{background:var(--accent-dark);border-color:var(--accent-dark)}.admin-btn-danger{color:var(--red);border-color:var(--admin-danger-border)}.admin-btn-danger:hover{background:var(--admin-danger-bg);border-color:var(--admin-danger-border-strong)}.admin-inline-input{border:1.5px solid var(--accent);background:var(--bg-elev);border-radius:7px;outline:none;width:100%;max-width:180px;padding:5px 10px;font-size:13px}.admin-inline-input-sm{width:64px;max-width:64px}.admin-inline-actions{flex-wrap:wrap;align-items:center;gap:8px;display:inline-flex}.admin-hint{color:var(--text-muted);margin:4px 0 12px;font-size:12px}.admin-audit-detail{text-overflow:ellipsis;white-space:nowrap;vertical-align:bottom;max-width:360px;color:var(--text-2);font-size:12px;display:inline-block;overflow:hidden}.admin-json-cell{align-items:center;gap:6px;max-width:100%;display:inline-flex}.admin-json-copy{border:1px solid var(--border-soft);color:var(--text-muted);cursor:pointer;background:0 0;border-radius:4px;flex-shrink:0;padding:2px 6px;font-size:11px;transition:all .14s}.admin-json-copy:hover{color:var(--accent);border-color:var(--accent-soft)}.admin-stem-cell{-webkit-line-clamp:2;cursor:pointer;color:var(--text-2);-webkit-box-orient:vertical;max-width:320px;font-size:13px;line-height:1.5;transition:color .14s;display:-webkit-box;overflow:hidden}.admin-stem-cell.expanded{-webkit-line-clamp:unset;overflow:visible}.admin-stem-cell:hover{color:var(--text)}.admin-subrow{background:var(--bg);padding:12px 16px!important}.admin-table-nested{background:var(--bg-elev);margin:0}.admin-table-nested th,.admin-table-nested td{font-size:12px}.admin-kpi-grid{grid-template-columns:repeat(auto-fit,minmax(150px,1fr));gap:14px;margin-bottom:28px;display:grid}.admin-kpi-card{background:var(--bg-elev);border:1px solid var(--border-soft);border-radius:11px;flex-direction:column;gap:4px;padding:16px 18px;display:flex}.admin-kpi-label{color:var(--text-muted);font-size:12px}.admin-kpi-value{font-family:var(--sans);color:var(--text);letter-spacing:-.01em;font-size:24px;font-weight:600}.admin-kpi-sub{color:var(--accent-dark);font-size:12px}.admin-bars{align-items:flex-end;gap:6px;height:180px;margin-bottom:28px;padding:8px 0 0;display:flex;overflow-x:auto}.admin-bar-col{flex-direction:column;justify-content:flex-end;align-items:center;gap:5px;min-width:28px;height:100%;display:flex}.admin-bar-fill{background:var(--accent);border-radius:4px 4px 0 0;width:60%;min-width:14px;transition:height .2s}.admin-bar-label{color:var(--text-muted);white-space:nowrap;font-size:10px}.admin-chart{position:relative}.admin-chart-axis{color:var(--text-subtle);font-variant-numeric:tabular-nums;justify-content:flex-end;padding:0 2px 4px;font-size:11px;display:flex}.admin-date-presets{border-right:1px solid var(--border-soft);gap:4px;margin-right:8px;padding-right:8px;display:flex}.admin-hbars{flex-direction:column;gap:8px;max-width:640px;display:flex}.admin-hbar-row{grid-template-columns:96px 1fr 110px;align-items:center;gap:10px;display:grid}.admin-hbar-label{color:var(--text);text-align:right;font-size:13px}.admin-hbar-track{background:var(--border-soft);border-radius:6px;height:18px;overflow:hidden}.admin-hbar-fill{background:var(--accent);border-radius:6px;height:100%;transition:width .2s}.admin-hbar-value{color:var(--text-2);font-size:12px}.admin-cell-mono{font-family:var(--mono);font-size:12.5px}.admin-cell-ellipsis{text-overflow:ellipsis;white-space:nowrap;max-width:160px;overflow:hidden}.admin-cell-subtle{color:var(--text-subtle);margin-top:3px;font-size:12px}.admin-code-chip{background:var(--accent-bg);color:var(--accent-dark);border:1px solid var(--accent-soft);font-family:var(--mono);letter-spacing:.08em;border-radius:7px;align-items:center;padding:4px 9px;font-size:12px;display:inline-flex}.admin-row-actions{flex-wrap:wrap;align-items:center;gap:6px;display:inline-flex}.admin-row-menu-wrap{display:inline-flex;position:relative}.admin-btn-icon{min-width:32px;padding:0 6px;font-size:16px;line-height:1}.admin-row-menu-backdrop{z-index:40;position:fixed;inset:0}.admin-row-menu{z-index:41;background:var(--bg-elev);border:1px solid var(--border-soft);border-radius:var(--radius-sm);box-shadow:var(--shadow-lg);min-width:120px;margin-top:4px;padding:4px;position:absolute;top:100%;right:0}.admin-row-menu-item{width:100%;color:var(--text);text-align:left;cursor:pointer;background:0 0;border:none;border-radius:6px;padding:8px 12px;font-size:13px;transition:background .14s;display:block}.admin-row-menu-item:hover:not(:disabled){background:var(--bg-soft)}.admin-row-menu-item:disabled{color:var(--text-subtle);cursor:not-allowed}.admin-release-panel{background:var(--bg-elev);border:1px solid var(--border-soft);border-radius:11px;justify-content:space-between;align-items:center;gap:16px;margin-bottom:16px;padding:16px 18px;display:flex}.admin-release-main{min-width:0}.admin-release-label{color:var(--text-muted);margin-bottom:4px;font-size:12px}.admin-release-title{color:var(--text);margin-bottom:4px;font-weight:600}.admin-release-meta,.admin-release-empty{color:var(--text-muted);font-size:12.5px;line-height:1.5}.admin-release-list{flex-direction:column;gap:8px;margin-bottom:18px;display:flex}.admin-release-row{background:var(--bg);border:1px solid var(--border-soft);border-radius:9px;justify-content:space-between;align-items:center;gap:12px;padding:10px 12px;font-size:13px;display:flex}.admin-release-row-name{color:var(--text);margin-left:8px;font-weight:500}.admin-release-row-meta{color:var(--text-muted);margin-left:8px;font-size:12px}.admin-release-detail{background:var(--bg-elev);border:1px solid var(--border-soft);border-radius:11px;margin:0 0 18px;padding:16px}.admin-release-detail-head{justify-content:space-between;align-items:flex-start;gap:12px;margin-bottom:14px;display:flex}.admin-release-checks{grid-template-columns:repeat(auto-fit,minmax(260px,1fr));gap:12px;display:grid}.admin-release-check-block{background:var(--bg);border:1px solid var(--border-soft);border-radius:9px;min-width:0;padding:12px}.admin-release-check-title{color:var(--text-muted);letter-spacing:.02em;margin-bottom:8px;font-size:12px;font-weight:700}.admin-release-check-empty{color:var(--text-subtle);font-size:12.5px}.admin-release-check-item{word-break:break-word;border-radius:7px;margin-bottom:6px;padding:7px 8px;font-size:12px;line-height:1.45}.admin-release-check-item.error{background:var(--admin-danger-bg);color:var(--red)}.admin-release-check-item.warning{background:var(--accent-bg);color:var(--accent-dark)}.admin-release-manifest{background:var(--bg);border:1px solid var(--border-soft);border-radius:9px;margin-top:12px;padding:12px}.admin-release-manifest-row{border-bottom:1px solid var(--border-soft);grid-template-columns:minmax(0,1fr) auto auto;align-items:center;gap:10px;padding:7px 0;font-size:12.5px;display:grid}.admin-release-manifest-row:last-child{border-bottom:none}.admin-release-manifest-row span{text-overflow:ellipsis;white-space:nowrap;min-width:0;overflow:hidden}.admin-release-manifest-row code{font-family:var(--mono);color:var(--text-subtle);background:var(--bg-elev);border:1px solid var(--border-soft);border-radius:5px;padding:1px 5px;font-size:10.5px}.admin-pagination{flex-wrap:wrap;justify-content:space-between;align-items:center;gap:14px;margin-top:20px;display:flex}.admin-pagination-info{color:var(--text-muted);font-size:13px}.admin-pagination-controls{align-items:center;gap:10px;display:flex}.admin-pagination-size{border:1px solid var(--border-soft);background:var(--bg-elev);color:var(--text-2);cursor:pointer;border-radius:6px;outline:none;padding:5px 8px;font-size:13px}.admin-pagination-size:focus{border-color:var(--accent)}.admin-pagination-jump{color:var(--text-muted);align-items:center;gap:4px;font-size:13px;display:flex}.admin-pagination-jump input{border:1px solid var(--border-soft);text-align:center;width:48px;color:var(--text);border-radius:6px;outline:none;padding:4px 6px;font-size:13px}.admin-pagination-jump input:focus{border-color:var(--accent)}.admin-form-card{background:var(--bg-elev);border:1px solid var(--border-soft);border-radius:11px;margin-bottom:22px;padding:24px}.admin-form-grid{grid-template-columns:repeat(auto-fit,minmax(230px,1fr));gap:16px;display:grid}.admin-form-grid-single{grid-template-columns:1fr}.admin-form-field{flex-direction:column;gap:5px;display:flex}.admin-form-label{color:var(--text-muted);letter-spacing:.02em;font-size:12px;font-weight:600}.admin-form-input{border:1.5px solid var(--border-soft);background:var(--bg);color:var(--text);border-radius:9px;outline:none;padding:9px 14px;font-size:13px;transition:border-color .14s}.admin-form-input:focus{border-color:var(--accent);background:var(--bg-elev)}.admin-form-static{min-height:38px;color:var(--text-2);align-items:center;font-size:13px;display:inline-flex}.admin-form-field-check{flex-direction:row;align-items:center;gap:7px;padding-top:22px}.admin-form-actions{gap:10px;margin-top:18px;display:flex}.admin-form-help{color:var(--text-muted);margin:0 0 18px;font-size:13px;line-height:1.65}.admin-form-error{color:var(--red);margin-top:14px;font-size:13px}.admin-pw-strength{font-size:12px;font-weight:600}.admin-pw-strength.level-1{color:var(--red)}.admin-pw-strength.level-2{color:var(--tip-accent)}.admin-pw-strength.level-3{color:var(--green)}.admin-plan-packages{border-top:1px solid var(--border-soft);margin-top:18px;padding-top:18px}.admin-plan-package-grid{grid-template-columns:repeat(auto-fit,minmax(210px,1fr));gap:12px;margin-top:10px;display:grid}.admin-plan-package-group{border:1px solid var(--border-soft);background:var(--bg);border-radius:10px;margin:0;padding:12px}.admin-plan-package-group legend{color:var(--text-muted);padding:0 6px;font-size:12px;font-weight:600}.admin-plan-package-option{min-height:34px;color:var(--text-2);grid-template-columns:auto 1fr auto;align-items:center;gap:8px;font-size:13px;display:grid}.admin-plan-package-option code{font-family:var(--mono);color:var(--text-subtle);background:var(--bg-elev);border:1px solid var(--border-soft);border-radius:5px;padding:1px 5px;font-size:10.5px}.admin-plan-package-help{color:var(--text-muted);margin-top:10px;font-size:12px;line-height:1.6}.admin-plan-scope{max-width:280px;color:var(--text-2);font-size:12.5px;line-height:1.55}.landing-shell{padding:0 0 60px}.landing-hero{text-align:center;padding:40px 0 32px}.landing-brand{flex-direction:column;align-items:center;gap:0;margin-bottom:10px;display:flex}.landing-brand-mark{background:var(--accent);width:60px;height:60px;color:var(--text-on-accent);font-family:var(--sans);box-shadow:var(--shadow-accent-mark);border-radius:18px;justify-content:center;align-items:center;font-size:30px;font-weight:700;display:flex}.landing-brand-name{font-family:var(--sans);color:var(--text);letter-spacing:.04em;margin-top:16px;font-size:26px;font-weight:700}.landing-slogan{color:var(--text-soft);letter-spacing:.16em;margin:4px 0 24px;font-size:11px;font-weight:500}.landing-title{font-family:var(--sans);color:var(--text);letter-spacing:-.01em;max-width:320px;margin:0 auto 14px;font-size:26px;font-weight:700;line-height:1.35}.landing-sub{font-family:var(--sans);color:var(--text-muted);max-width:320px;margin:0 auto 24px;font-size:13.5px;line-height:1.7}.landing-actions{flex-wrap:wrap;justify-content:center;gap:12px;display:flex}.landing-btn-primary{background:var(--accent);color:var(--text-on-accent);box-shadow:var(--shadow-accent);border-radius:14px;padding:14px 32px;font-size:16px;font-weight:700;text-decoration:none;transition:background .14s;display:inline-block}.landing-btn-primary:hover{background:var(--accent-dark)}.landing-btn-secondary{color:var(--accent);border:1.5px solid var(--accent-border);background:0 0;border-radius:14px;padding:14px 32px;font-size:16px;font-weight:600;text-decoration:none;transition:all .14s;display:inline-block}.landing-btn-secondary:hover{background:var(--accent-bg)}.landing-stats{background:var(--bg-elev);border:1px solid var(--border);border-radius:var(--radius-md);box-shadow:var(--shadow-sm);justify-content:center;align-items:center;gap:20px;margin-top:28px;padding:16px 20px;display:flex}.landing-stat{flex-direction:column;align-items:center;gap:2px;display:flex}.landing-stat-num{font-family:var(--sans);color:var(--accent-dark);letter-spacing:-.02em;font-size:22px;font-weight:700}.landing-stat-label{color:var(--text-muted);font-size:12px}.landing-stat-divider{background:var(--border-soft);width:1px;height:28px}.landing-features{grid-template-columns:repeat(auto-fit,minmax(240px,1fr));gap:20px;padding:28px 0;display:grid}.landing-feature{background:var(--bg-elev);border:1px solid var(--border);border-radius:var(--radius-md);box-shadow:var(--shadow-sm);padding:18px}.landing-feature-icon{background:var(--accent-soft);width:38px;height:38px;color:var(--accent);border-radius:11px;justify-content:center;align-items:center;margin-bottom:12px;display:flex}.landing-feature-icon .dk-icon{width:20px;height:20px}.landing-feature-title{font-family:var(--sans);color:var(--text);letter-spacing:-.01em;margin:0 0 6px;font-size:16px;font-weight:700}.landing-feature-desc{color:var(--text-muted);margin:0;font-size:13px;line-height:1.6}.landing-subjects{padding:28px 0}.landing-section-title{font-family:var(--sans);color:var(--text);letter-spacing:-.01em;text-align:center;margin:0 0 16px;font-size:20px;font-weight:700}.landing-subject-grid{grid-template-columns:repeat(auto-fit,minmax(200px,1fr));gap:12px;display:grid}.landing-subject-card{background:var(--bg-elev);border:1px solid var(--border);border-radius:var(--radius-md);box-shadow:var(--shadow-sm);padding:18px}.landing-subject-name{font-family:var(--sans);color:var(--text);margin-bottom:4px;font-size:17px;font-weight:700}.landing-subject-range{color:var(--text-muted);font-size:12.5px;line-height:1.5}.landing-subjects-hint{text-align:center;color:var(--text-subtle);margin:14px 0 0;font-size:12.5px}.landing-cta{text-align:center;border-top:1px solid var(--border-soft);padding:36px 0 32px}.landing-cta-title{font-family:var(--sans);color:var(--text);letter-spacing:-.01em;margin:0 0 8px;font-size:22px;font-weight:700}.landing-cta-desc{color:var(--text-muted);margin:0 0 20px;font-size:13px;line-height:1.6}.landing-footer{border-top:1px solid var(--border-soft);flex-direction:column;align-items:center;gap:10px;padding:22px 0 0;display:flex}.landing-footer-top{align-items:baseline;gap:10px;display:flex}.landing-footer-brand{font-family:var(--sans);color:var(--text);font-size:14px;font-weight:700}.landing-footer-slogan{color:var(--text-subtle);font-size:12px}.landing-footer-links{gap:16px;display:flex}.landing-footer-links a{color:var(--text-muted);font-size:13px;text-decoration:none;transition:color .14s}.landing-footer-links a:hover{color:var(--accent-dark)}.landing-footer-bottom{flex-wrap:wrap;justify-content:center;align-items:center;gap:12px;display:flex}.landing-footer-copy{color:var(--text-faint);letter-spacing:.04em;font-size:11.5px}.landing-footer-icp{color:var(--text-faint);font-size:11.5px}.plans-shell{max-width:680px;margin:0 auto;padding:0 20px 60px}.plans-title{font-family:var(--sans);color:var(--text);letter-spacing:-.01em;margin:0;font-size:27px;font-weight:700}.plans-sub{color:var(--text-subtle);margin:7px 0 0;font-size:13px;line-height:1.6}.plans-grid{grid-template-columns:repeat(auto-fit,minmax(min(260px,100%),1fr));gap:16px;display:grid}.plan-card{background:var(--bg-elev);border:1px solid var(--border);border-radius:var(--radius-lg);flex-direction:column;padding:24px;transition:box-shadow .16s,transform .16s;display:flex;position:relative}.plan-card:hover{box-shadow:var(--shadow-lg);transform:translateY(-2px)}.plan-card-recommended{background:var(--accent);color:var(--text-on-accent);border-radius:var(--radius-lg);box-shadow:var(--shadow-accent-mark);border:none;padding:22px 20px}.plan-card-recommended:hover{transform:translateY(-2px);box-shadow:0 14px 32px #66087452}.plan-card-skeleton{min-height:320px}.plan-card-badge{color:var(--text-on-accent);letter-spacing:.04em;background:#ffffff2e;border-radius:8px;padding:5px 10px;font-size:11.5px;font-weight:600;position:absolute;top:16px;left:auto;right:20px}.plan-card-recommended .plan-card-name,.plan-card-recommended .plan-card-duration,.plan-card-recommended .plan-card-desc,.plan-card-recommended .plan-card-period,.plan-card-recommended .plan-card-monthly{color:var(--text-on-accent)}@supports (color:color-mix(in lab, red, red)){.plan-card-recommended .plan-card-monthly{color:color-mix(in srgb, var(--text-on-accent) 70%, transparent)}}.plan-card-recommended .plan-card-subject-tag{background:var(--text-on-accent)}@supports (color:color-mix(in lab, red, red)){.plan-card-recommended .plan-card-subject-tag{background:color-mix(in srgb, var(--text-on-accent) 18%, transparent)}}.plan-card-recommended .plan-card-subject-tag{color:var(--text-on-accent);border:none}.plan-card-recommended .plan-card-checklist li{color:var(--text-on-accent)}@supports (color:color-mix(in lab, red, red)){.plan-card-recommended .plan-card-checklist li{color:color-mix(in srgb, var(--text-on-accent) 92%, transparent)}}.plan-card-recommended .plan-card-check{color:var(--text-on-accent)}.plan-card-header{margin-bottom:16px}.plan-card-name{font-family:var(--sans);color:var(--text);margin:0 0 4px;font-size:19px;font-weight:700}.plan-card-duration{color:var(--text-muted);font-size:13px}.plan-card-price{flex-wrap:wrap;align-items:baseline;gap:4px;margin-bottom:14px;display:flex}.plan-card-amount{font-family:var(--sans);color:var(--accent-dark);letter-spacing:-.01em;margin-top:16px;font-size:34px;font-weight:700}.plan-card-amount-dec{font-family:var(--sans);color:var(--accent-dark);font-size:18px;font-weight:700}.plan-card-period{color:var(--text-muted);font-size:15px;font-weight:500}.plan-card-monthly{width:100%;color:var(--text-subtle);margin-top:4px;font-size:12.5px}.plan-card-desc{color:var(--text-muted);margin:0 0 14px;font-size:14px;line-height:1.5}.plan-card-subjects{flex-wrap:wrap;gap:6px;margin-bottom:16px;display:flex}.plan-card-subject-tag{background:var(--accent-bg);color:var(--accent-dark);border-radius:var(--radius-sm);padding:3px 10px;font-size:12px;font-weight:500}.plan-card-checklist{flex-direction:column;gap:7px;margin:0 0 18px;padding:0;list-style:none;display:flex}.plan-card-checklist li{color:var(--text-2);align-items:center;gap:8px;font-size:13px;display:flex}.plan-card-check{color:var(--green);flex-shrink:0;align-items:center;display:flex}.plan-card-check .dk-icon{width:16px;height:16px}.plan-card-btn{background:var(--accent);width:100%;color:var(--text-on-accent);border-radius:var(--radius-pill);cursor:pointer;box-shadow:var(--shadow-sm);border:none;margin-top:auto;padding:13px;font-size:15px;font-weight:600;transition:background .14s,box-shadow .14s}.plan-card-btn:hover{background:var(--accent-dark);box-shadow:var(--shadow-md)}.plan-card-btn:disabled{opacity:.5;cursor:default;box-shadow:none}.plan-card-btn-activated{background:var(--green);opacity:1;cursor:default}.plan-card-btn-activated:hover{background:var(--green);box-shadow:none}.plan-card-recommended .plan-card-amount,.plan-card-recommended .plan-card-amount-dec{color:var(--text-on-accent)}.plan-card-recommended .plan-card-btn{background:var(--bg-elev);color:var(--accent);box-shadow:none;border-radius:13px;margin-top:16px;padding:14px;font-size:15px;font-weight:700}.plan-card-recommended .plan-card-btn:hover{background:var(--accent-soft)}.plan-card-recommended .plan-card-btn-activated{background:var(--text-on-accent)}@supports (color:color-mix(in lab, red, red)){.plan-card-recommended .plan-card-btn-activated{background:color-mix(in srgb, var(--text-on-accent) 18%, transparent)}}.plan-card-recommended .plan-card-btn-activated{color:var(--text-on-accent)}.plans-login-hint{text-align:center;color:var(--text-muted);background:var(--bg-elev);border:1px solid var(--border);border-radius:var(--radius-md);box-shadow:var(--shadow-sm);margin-top:24px;padding:14px 16px;font-size:14px}.plans-login-hint a{color:var(--accent-dark);font-weight:500}.profile-shell{--profile-paper:var(--bg-elev);--profile-paper-soft:var(--bg-soft);--profile-ink:var(--text);--profile-muted:var(--text-muted);--profile-line:var(--border);--profile-shadow:var(--shadow-lg);max-width:760px;color:var(--profile-ink);margin:0 auto;padding:clamp(20px,5vw,34px) clamp(16px,5vw,28px) 80px}.profile-hero{border:1px solid var(--border);background:var(--bg-elev);box-shadow:var(--shadow-lg);border-radius:20px;padding:18px}.profile-hero:after{display:none}.profile-hero-top,.profile-overview{z-index:1;position:relative}.profile-hero-top{grid-template-columns:auto minmax(0,1fr);align-items:center;gap:16px;display:grid}.profile-avatar{background:var(--accent-soft);width:62px;height:62px;color:var(--accent);font-family:var(--sans);border-radius:50%;flex-shrink:0;place-items:center;font-size:26px;font-weight:700;display:grid}.profile-info{min-width:0}.profile-kicker{color:var(--profile-muted);letter-spacing:.04em;margin-bottom:5px;font-size:12.5px;font-weight:700}.profile-nickname-row{align-items:center;gap:12px;min-width:0;display:flex}.profile-nickname{min-width:0;color:var(--profile-ink);font-family:var(--sans);letter-spacing:0;overflow-wrap:anywhere;margin:0;font-size:18px;font-weight:700;line-height:1.3}.profile-nickname-edit-btn{color:var(--accent);background:0 0;border:none;border-radius:0;flex-shrink:0;padding:0;font-size:13px;font-weight:600;transition:color .14s}.profile-nickname-edit-btn:hover{color:var(--accent-dark)}.profile-nickname-edit{flex-wrap:wrap;align-items:center;gap:8px;display:flex}.profile-nickname-input{border:1.5px solid var(--border);background:var(--bg-elev);width:min(240px,100%);height:42px;color:var(--profile-ink);border-radius:14px;outline:none;padding:0 13px;font-size:15px}.profile-nickname-input:focus{border-color:var(--accent);box-shadow:0 0 0 3px var(--accent)}@supports (color:color-mix(in lab, red, red)){.profile-nickname-input:focus{box-shadow:0 0 0 3px color-mix(in srgb, var(--accent) 18%, transparent)}}.profile-nickname-save,.profile-nickname-cancel{border-radius:999px;min-height:44px;padding:0 14px;font-size:13px;font-weight:800;transition:transform .14s,background .14s}.profile-nickname-save{background:var(--ink-block);color:var(--ink-block-fg)}.profile-nickname-cancel{border:1px solid var(--profile-line);color:var(--profile-muted);background:#ffffff9e}.profile-nickname-count{color:var(--text-subtle);font-variant-numeric:tabular-nums;font-size:12px}.profile-nickname-save:hover,.profile-nickname-cancel:hover{transform:translateY(-1px)}.profile-phone{color:var(--text-subtle);overflow-wrap:anywhere;margin-top:4px;font-size:13px}.profile-overview{grid-template-columns:repeat(3,minmax(0,1fr));gap:10px;margin-top:24px;display:grid}.profile-overview-item{border:1px solid var(--border);background:#ffffff85;border-radius:18px;padding:14px 14px 13px}.profile-overview-item b{color:var(--profile-ink);font-variant-numeric:tabular-nums;font-size:25px;font-weight:800;line-height:1.05;display:block}.profile-overview-item span{color:var(--profile-muted);white-space:nowrap;margin-top:6px;font-size:12.5px;display:block}.profile-label{letter-spacing:.06em;color:var(--text-soft);margin:24px 2px 9px;font-size:12px;font-weight:700}.profile-section{border:1px solid var(--border);background:var(--bg-elev);border-radius:18px;padding:4px 16px;box-shadow:0 1px 2px #0000000a,0 6px 18px #00000008}.profile-section-head{justify-content:space-between;align-items:flex-start;gap:16px;margin-bottom:16px;display:flex}.profile-section-title{color:var(--profile-ink);font-family:var(--sans);letter-spacing:0;margin:0;font-size:21px;font-weight:750;line-height:1.25}.profile-section-sub{color:var(--profile-muted);margin:5px 0 0;font-size:13px;line-height:1.55}.profile-section-link,.profile-link{min-height:36px;color:var(--accent);background:var(--accent-bg);border:1px solid var(--accent-bg);border-radius:999px;flex-shrink:0;align-items:center;padding:0 12px;font-size:13px;font-weight:800;display:inline-flex}.profile-empty{border:1px dashed var(--border);background:var(--bg-elev);text-align:center;border-radius:18px;padding:20px}.profile-empty p{color:var(--profile-muted);margin:0 0 10px;font-size:14px}.profile-subs{gap:10px;display:grid}.profile-sub-item{grid-template-columns:minmax(0,1fr) auto;align-items:center;gap:14px;padding:15px 0;display:grid}.profile-sub-item+.profile-sub-item{border-top:1px solid var(--border)}.profile-sub-main{min-width:0}.profile-sub-plan{color:var(--profile-ink);overflow-wrap:anywhere;font-size:15.5px;font-weight:600;line-height:1.45}.profile-sub-scope,.profile-sub-expires{color:var(--text-soft);overflow-wrap:anywhere;margin-top:3px;font-size:12.5px;line-height:1.45}.profile-sub-status{white-space:nowrap;border:1px solid #0000;border-radius:8px;justify-self:end;align-items:center;min-height:30px;padding:5px 10px;font-size:11.5px;font-weight:600;display:inline-flex}.profile-sub-active{background:var(--accent-bg);color:var(--accent);border-color:#0000}.profile-sub-pending{background:var(--tip-bg);border-color:var(--tip-bg);color:var(--tip-accent)}.profile-sub-expired,.profile-sub-cancelled{background:var(--bg-soft);border-color:var(--border);color:var(--text-subtle)}.profile-actions{gap:10px;display:grid}.profile-action{color:inherit;grid-template-columns:20px minmax(0,1fr) auto;align-items:center;gap:13px;padding:15px 0;text-decoration:none;transition:background .14s;display:grid}.profile-action+.profile-action{border-top:1px solid var(--border)}.profile-action-icon{color:var(--accent);align-items:center;display:flex}.profile-action-icon svg{width:20px;height:20px}.profile-action:hover{background:var(--accent-bg);border-color:var(--accent-soft);transform:translateY(-1px)}.profile-action b{color:var(--profile-ink);font-size:15.5px;font-weight:500;line-height:1.35;display:block}.profile-action small{color:var(--profile-muted);margin-top:4px;font-size:12.5px;line-height:1.45;display:block}.profile-action em{color:var(--chevron);align-items:center;font-style:normal;display:inline-flex}.profile-action em svg{width:15px;height:15px}.profile-logout{border:1.5px solid var(--accent-border);width:100%;color:var(--accent);background:0 0;border-radius:14px;margin-top:26px;padding:15px;font-size:15px;font-weight:600;transition:background .14s}.profile-logout:hover{background:var(--accent-bg)}.profile-help-links{flex-wrap:wrap;gap:12px;display:flex}.profile-help-link{border:1px solid var(--border-soft);border-radius:var(--radius-pill);background:var(--bg-elev);color:var(--text-2);cursor:pointer;font-size:14px;font-weight:500;font-family:var(--sans);align-items:center;padding:10px 20px;text-decoration:none;transition:border-color .14s,color .14s;display:inline-flex}.profile-help-link:hover{border-color:var(--accent);color:var(--accent-dark)}.version-switcher{background:var(--bg-soft);border-radius:8px;gap:0;margin:0 16px 12px;padding:3px;display:flex}.version-btn{color:var(--text-muted);cursor:pointer;background:0 0;border:none;border-radius:6px;flex:1;padding:7px 0;font-size:13px;font-weight:500;transition:all .15s}.version-btn.active{background:var(--bg-elev);color:var(--text);box-shadow:0 1px 3px #00000014}@media (width<=560px){.login-shell{padding-top:36px}.login-code-row{grid-template-columns:1fr;display:grid}.login-code-btn{width:100%}.plans-shell{padding-left:0;padding-right:0}.profile-shell{padding-inline:14px}.plans-order-status{flex-direction:column;align-items:stretch}.plans-order-btn{width:100%}.profile-hero{border-radius:24px;padding:20px 18px}.profile-hero-top{grid-template-columns:1fr;align-items:start}.profile-avatar{border-radius:20px;width:60px;height:60px;font-size:26px}.profile-nickname-row{flex-wrap:wrap;align-items:flex-start}.profile-nickname-edit{grid-template-columns:1fr auto auto auto;align-items:center;gap:8px;width:100%;display:grid}.profile-nickname-input{width:100%}.profile-overview{grid-template-columns:1fr 1fr}.profile-overview-item.wide{grid-column:1/-1}.profile-section{border-radius:22px;padding:18px 14px}.profile-section-head{align-items:flex-start}.profile-sub-item{grid-template-columns:minmax(0,1fr) auto;align-items:start;gap:10px}.profile-sub-status{justify-self:end}.profile-action{padding:13px}}.version-btn:hover:not(.active){color:var(--text)}.nav-subject{margin:0 0 9px}.nav-subject-header{color:var(--text);cursor:pointer;-webkit-user-select:none;user-select:none;background:var(--bg-elev);border:1px solid #00000012;border-radius:14px;align-items:center;gap:12px;padding:13px 14px;font-size:16px;font-weight:700;transition:background .15s;display:flex}.nav-subject-header:hover{background:var(--bg-soft)}.nav-subject-dot{background:var(--subject-fallback);border-radius:50%;flex-shrink:0;width:9px;height:9px}.nav-subject-arrow{width:13px;height:13px;fill:var(--chevron);flex-shrink:0;margin-left:auto;transition:transform .15s}.nav-subject-header:not(.collapsed) .nav-subject-arrow{transform:rotate(90deg)}.nav-subject>.nav-grade{padding-left:6px}#drawerNav{flex-direction:column;gap:10px;display:flex}.nav-subject-card{background:var(--bg-elev);border:1px solid var(--border);color:var(--text);border-radius:14px;align-items:center;gap:10px;padding:13px 14px;font-size:16px;font-weight:700;text-decoration:none;transition:background .15s;display:flex}.nav-subject-card:active{background:var(--bg-soft)}.nav-subject-card .nav-subject-dot{width:9px;height:9px}.nav-subject-name{white-space:nowrap;text-overflow:ellipsis;flex:1;min-width:0;overflow:hidden}.nav-subject-chevron{width:14px;height:14px;color:var(--chevron);flex-shrink:0;margin-left:auto}.nav-grade-header{color:var(--text-muted);text-transform:uppercase;letter-spacing:.03em;cursor:pointer;-webkit-user-select:none;user-select:none;align-items:center;padding:6px 16px 6px 28px;font-size:12px;font-weight:600;display:flex}.nav-grade-header:hover{color:var(--text)}.nav-chapter-header{cursor:pointer;-webkit-user-select:none;user-select:none;align-items:center;gap:6px;padding:7px 16px 7px 36px;display:flex}.nav-chapter-header:hover{background:var(--bg-soft)}.nav-chapter-arrow{color:var(--text-subtle);flex-shrink:0;font-size:10px;transition:transform .15s}.nav-chapter-header.collapsed .nav-chapter-arrow{transform:rotate(-90deg)}.nav-chapter-name{color:var(--text);white-space:nowrap;text-overflow:ellipsis;flex:1;font-size:13px;overflow:hidden}.nav-chapter-progress{color:var(--text-subtle);flex-shrink:0;font-size:11px}.nav-chapter-bar{background:var(--border-soft);border-radius:2px;flex-shrink:0;width:40px;height:4px;overflow:hidden}.nav-chapter-bar-fill{background:var(--accent);border-radius:2px;height:100%;transition:width .2s}.nav-chapter-bar-fill.complete{background:var(--green)}.nav-point{color:var(--text-2);align-items:center;gap:6px;padding:5px 16px 5px 52px;font-size:13px;text-decoration:none;display:flex}.nav-point:hover{background:var(--bg-soft);color:var(--text)}.nav-point.active{color:var(--accent-dark);background:var(--accent-bg);font-weight:500}.nav-point.locked{color:var(--text-subtle)}.nav-point.locked:hover{background:var(--accent-bg);color:var(--accent-dark)}.nav-point-dot{border:1.5px solid var(--border);border-radius:50%;flex-shrink:0;width:6px;height:6px}.nav-point-dot.learned{background:var(--green);border-color:var(--green)}.nav-point-dot.locked{border-color:var(--text-subtle);background:0 0}.nav-point-lock{color:var(--accent-dark);background:var(--accent-bg);border:1px solid var(--accent-soft);border-radius:5px;margin-left:auto;padding:1px 5px;font-size:10.5px;line-height:1.4}.subj-shell{--subj-paper:var(--bg-soft);--subj-paper-strong:var(--bg-elev);--subj-ink:var(--text);--subj-muted:var(--text-muted);--subj-line:var(--border);--subj-shadow:var(--shadow-sm);max-width:760px;color:var(--subj-ink);margin:0 auto;padding:22px 20px 120px}.subj-empty{border:1px solid var(--subj-line);background:var(--subj-paper-strong);color:var(--subj-muted);box-shadow:var(--subj-shadow);border-radius:16px;padding:28px}.subj-head{box-shadow:none;background:0 0;border:none;padding:0}.subj-head:after{display:none}.subj-dot{border-radius:50%;flex-shrink:0;width:12px;height:12px}.subj-hero{align-items:center;gap:11px;display:flex}.subj-title{font-family:var(--sans);letter-spacing:-.01em;flex:1;align-items:center;gap:11px;margin:0;font-size:26px;font-weight:700;line-height:1.2;display:flex}.subj-count{color:var(--text-subtle);font-variant-numeric:tabular-nums;flex-shrink:0;font-size:13px}.subj-grade{margin-top:24px}.subj-grade-name{font-family:var(--sans);color:var(--text-soft);letter-spacing:.06em;margin:0 0 10px;font-size:12px;font-weight:700;line-height:1.4}.subj-chapter{border:1px solid var(--border);background:var(--bg-elev);box-shadow:var(--shadow-sm);border-radius:16px;padding:6px 16px}.subj-chapter+.subj-chapter{margin-top:11px}.subj-chapter-head{border-bottom:1px solid var(--border-soft);justify-content:space-between;align-items:center;gap:14px;padding:13px 0 11px;display:flex}.subj-chapter-name{font-family:var(--sans);color:var(--text);font-size:15px;font-weight:700;line-height:1.3}.subj-chapter-progress{font-variant-numeric:tabular-nums;color:var(--text-subtle);flex-shrink:0;font-size:12px;font-weight:600}.subj-chapter-progress.has-progress{color:var(--accent)}.subj-points{display:grid}.subj-point{border-top:1px solid var(--border-soft);color:var(--text);cursor:pointer;align-items:center;gap:11px;padding:11px 0;transition:background .16s;display:flex}.subj-point:first-child{border-top:none}.subj-point:hover{background:var(--bg-soft)}.subj-point-dot{background:0 0;border:1.5px solid #0003;border-radius:50%;flex-shrink:0;width:8px;height:8px}.subj-point-dot.learned{background:var(--accent);border-color:var(--accent)}.subj-point-dot.locked{background:#0000002e;border-color:#0000002e}.subj-point-name{min-width:0;color:var(--text-ink);flex:1;font-size:14.5px;line-height:1.4}.subj-point.learned .subj-point-name{color:var(--text)}.subj-point:hover .subj-point-name{color:var(--accent)}.subj-point.locked .subj-point-name,.subj-point.locked:hover .subj-point-name{color:var(--text-subtle)}.subj-point-badge{white-space:nowrap;border-radius:5px;flex-shrink:0;padding:2px 7px;font-size:11px;font-weight:600}.subj-point-badge.learned{color:var(--accent);background:var(--accent-bg)}.subj-point-badge.locked{color:var(--text-subtle);background:var(--chip-bg)}.subj-point-badge.advanced{color:var(--accent-dark);background:var(--accent-bg)}@media (width<=720px){.subj-shell{padding-inline:18px}}.vc-stats{gap:9px;display:flex}.vc-stat{background:var(--bg-elev);border:1px solid var(--border);text-align:center;cursor:pointer;font:inherit;border-radius:14px;flex:1;padding:13px 6px;transition:background .15s,box-shadow .15s}.vc-stat:hover{background:var(--bg-soft);box-shadow:var(--shadow-sm)}.vc-stat b{color:var(--text);font-size:26px;font-weight:700;line-height:1.1;display:block}.vc-stat span{color:var(--text-soft);margin-top:3px;font-size:12px;display:block}.vc-stat.accent b{color:var(--accent)}.vc-tabs{border-bottom:1px solid var(--border);gap:24px;margin-bottom:14px;display:flex}.vc-tabs .coll-tab{color:var(--text-subtle);border-bottom:2px solid #0000;padding:10px 0;font-size:15px;font-weight:500}.vc-tabs .coll-tab.active{color:var(--accent);border-bottom:2px solid var(--accent);font-weight:700}.vc-daily{color:var(--text-muted);margin-bottom:14px;font-size:14px}.vc-daily select{border:1px solid var(--border-strong);background:var(--bg-elev);color:var(--text);border-radius:9px;margin:0 6px;padding:6px 11px;font-size:14px;font-weight:600}.vc-progressbar{background:#00000012;border-radius:3px;height:6px;margin-bottom:6px;overflow:hidden}.vc-progressbar-fill{background:var(--accent);border-radius:3px;height:100%;transition:width .25s}.vc-counter{color:var(--text-soft);text-align:center;margin-top:9px;margin-bottom:14px;font-size:12.5px}.vc-counter b{color:var(--text)}.vc-card{text-align:center;background:var(--bg-elev);border:1px solid var(--border);min-height:188px;box-shadow:var(--shadow-lg);cursor:pointer;width:100%;color:inherit;border-radius:22px;flex-direction:column;justify-content:center;align-items:center;padding:44px 24px;font-family:inherit;display:flex}.vc-card.revealed{cursor:default}.vc-word{color:var(--text);text-align:center;letter-spacing:-.01em;font-size:46px;font-weight:700}.vc-tap{text-align:center;color:var(--text-faint);margin-top:18px;font-size:14px}.vc-back{margin-top:20px}.vc-pos-cn{color:var(--text);font-size:16px;font-weight:600;line-height:1.6}.vc-pos{color:var(--accent);background:var(--accent-bg);border-radius:var(--radius-sm);margin-right:8px;padding:1px 6px;font-size:12px}.vc-freq{color:var(--text-muted);margin-top:8px;font-size:12.5px}.vc-freq b{color:var(--accent-dark)}.vc-gk{color:var(--accent-dark);background:var(--accent-bg);border:1px solid var(--accent-soft);border-radius:var(--radius-sm);margin-left:8px;padding:1px 6px;font-size:11px}.vc-sub{color:var(--text-subtle);margin:14px 0 6px;font-size:11.5px;font-weight:600}.vc-phr-row{align-items:baseline;gap:8px;padding:2px 0;font-size:13.5px;display:flex}.vc-phr-en{color:var(--text);min-width:38%;font-weight:500}.vc-phr-cn{color:var(--text-muted);flex:1}.vc-phr-c{color:var(--text-subtle);background:var(--bg-soft);border-radius:4px;padding:0 5px;font-size:11px}.vc-sent-row{margin:6px 0}.vc-sent-en{color:var(--text-subtle);font-size:13px;line-height:1.5}.vc-sent-cn{color:var(--text-subtle);font-size:13px}.vc-actions{gap:10px;margin-top:16px;display:flex}.vc-btn{border-radius:var(--radius-pill);cursor:pointer;border:1px solid var(--border);background:var(--bg-elev);color:var(--text);flex:1;padding:12px;font-size:15px;font-weight:600;transition:all .15s}.vc-btn:hover{filter:brightness(.98)}.vc-btn.wide{flex:1}.vc-btn.primary{background:var(--accent);border-color:var(--accent);color:var(--text-on-accent);box-shadow:var(--shadow-accent-soft);border-radius:14px;padding:16px;font-size:16px;font-weight:700}.vc-btn.good{background:var(--green);border-color:var(--green);color:var(--text-on-accent)}.vc-btn.bad{background:var(--bg-elev);border-color:var(--warn-border);color:var(--red)}.vc-btn.ghost{background:var(--bg-elev);color:var(--text-muted)}.vc-done{text-align:center;padding:50px 0}.vc-done-mark{background:var(--green-bg);width:56px;height:56px;color:var(--green);border-radius:50%;margin:0 auto 16px;font-size:30px;line-height:56px}.vc-done h2{color:var(--text);margin-bottom:6px;font-size:20px}.vc-done p{color:var(--text-muted);margin-bottom:22px;font-size:13.5px}.vc-search{border-radius:var(--radius-md);background:var(--bg-elev);width:100%;color:var(--text);box-shadow:var(--shadow-sm);border:1px solid #00000024;margin-bottom:12px;padding:10px 14px;font-size:14.5px}.vc-filters{flex-wrap:wrap;gap:8px;margin-bottom:10px;display:flex}.vc-chip{border-radius:var(--radius-chip);border:1px solid var(--border-strong);background:var(--bg-elev);min-height:34px;color:var(--text-muted);cursor:pointer;padding:7px 14px;font-size:13px;transition:all .14s}.vc-chip.active{background:var(--accent);border-color:var(--accent);color:var(--text-on-accent);font-weight:600}.vc-count{color:var(--text-subtle);margin-bottom:8px;font-size:12px}.vc-list{border:1px solid var(--border);border-radius:var(--radius-md);background:var(--bg-elev);box-shadow:var(--shadow-sm);overflow:hidden}.vc-row{border-top:1px solid var(--border-soft)}.vc-row:first-child{border-top:none}.vc-row-head{cursor:pointer;text-align:left;width:100%;color:inherit;background:0 0;border:none;align-items:center;gap:9px;padding:10px 12px;font-family:inherit;display:flex}.vc-row.open .vc-row-head{background:var(--bg-soft)}.vc-dot{background:var(--border);border-radius:50%;flex-shrink:0;width:7px;height:7px}.vc-dot.learning{background:var(--tip-accent)}.vc-dot.due{background:var(--red)}.vc-dot.known{background:var(--green)}.vc-row-w{color:var(--text);min-width:92px;font-size:15px;font-weight:600}.vc-row-pos{color:var(--text-subtle);min-width:32px;font-size:11px}.vc-row-cn{color:var(--text-muted);text-overflow:ellipsis;white-space:nowrap;flex:1;font-size:12.5px;overflow:hidden}.vc-row-freq{color:var(--accent);background:var(--accent-bg);border-radius:var(--radius-sm);flex-shrink:0;padding:1px 7px;font-size:11.5px}.vc-row-detail{padding:4px 14px 14px}.vc-row-acts{gap:8px;margin-top:10px;display:flex}.vc-mini{border-radius:var(--radius-sm);border:1px solid var(--border-soft);background:var(--bg-elev);color:var(--text-muted);cursor:pointer;padding:5px 12px;font-size:12px;transition:all .14s}.vc-mini:hover{color:var(--accent-dark);border-color:var(--accent-soft);background:var(--accent-bg)}.nh-search{background:var(--bg-elev);border:1px solid var(--border-soft);border-radius:var(--radius-pill);box-shadow:var(--shadow-sm);transition:border-color .16s,box-shadow .16s}.nh-search:hover,.nh-search:active{border-color:var(--accent);box-shadow:var(--shadow-md)}.nh-search svg{stroke:var(--accent)}.nh-courses{flex-direction:column;gap:10px;display:flex}.nh-course{text-align:left;background:var(--bg-elev);border:1px solid var(--border-soft);border-radius:var(--radius-lg);width:100%;box-shadow:var(--shadow-sm);align-items:center;gap:14px;padding:18px;transition:border-color .16s,background .16s,transform .16s,box-shadow .16s;display:flex}.nh-course.has-rule{border-bottom:1px solid var(--border-soft)}.nh-course:hover{border-color:var(--accent);background:var(--accent-bg);box-shadow:var(--shadow-md)}.nh-course:active{transform:translateY(1px)}.nh-course-dot{border-radius:50%;flex-shrink:0;width:10px;height:10px;display:block}.nh-course-name{min-width:0;font-family:var(--sans);color:var(--text);letter-spacing:-.005em;flex:1;font-size:18px;font-weight:600}.nh-course-meta{color:var(--text-subtle);flex-shrink:0;font-size:13px}.nh-course-arrow{color:var(--text-subtle);flex-shrink:0;font-size:18px}.nh-course:hover .nh-course-name{color:var(--accent-dark)}.nh-course:hover .nh-course-arrow{color:var(--accent)}.nh-block-head .nh-label{color:var(--text-muted)}.suspense-fallback{padding:40px}.sr-only{clip:rect(0, 0, 0, 0);white-space:nowrap;border:0;width:1px;height:1px;margin:-1px;padding:0;position:absolute;overflow:hidden}.dk-icon{vertical-align:-.125em;flex-shrink:0;width:1em;height:1em;display:inline-block}@media (prefers-reduced-motion:reduce){*,:before,:after{scroll-behavior:auto!important;transition-duration:.01ms!important;animation-duration:.01ms!important;animation-iteration-count:1!important}}body{min-width:320px}svg{stroke-linecap:round;stroke-linejoin:round}body.home-no-header{padding-top:var(--safe-t)}body.home-no-header .main{max-width:none;padding:0 0 120px}.header-title{letter-spacing:-.005em;font-size:14.5px;font-weight:600}.header-btn,.header-nav-btn,.toc-btn{min-width:44px;color:var(--text-2);border-radius:12px;background:0 0!important;border:0!important;width:44px!important;height:44px!important;min-height:44px!important;padding:0!important}.header-btn svg,.header-nav-btn svg,.toc-btn svg{stroke-width:1.9px;width:22px;height:22px}.toc-btn span{display:none!important}.header-btn:active,.header-nav-btn:active,.toc-btn:active{background:var(--bg-soft)!important}.section-label{color:var(--text-soft)!important;letter-spacing:.06em!important;font-size:12px!important;font-weight:700!important}.section-label-home{margin:18px 0 0}.section-label-home-major{margin:24px 0 0}.section-label-with-gap{margin-bottom:9px}.task-row{border:1px solid var(--border);background:var(--bg-elev);cursor:pointer;border-radius:15px;align-items:center;gap:13px;min-height:58px;margin-bottom:9px;padding:15px 16px;transition:background .14s,border-color .14s;display:flex;box-shadow:0 1px 2px #00000008}.task-row:active{background:var(--bg-soft)}.task-check{border:1.5px solid var(--border-bold);border-radius:999px;flex:none;place-items:center;width:23px;height:23px;transition:background .2s,border-color .2s;display:grid}.task-check svg{opacity:0;transition:opacity .2s,transform .3s cubic-bezier(.34,1.56,.64,1);transform:scale(.3)}.task-check-btn{font:inherit;color:inherit;cursor:pointer;appearance:none;background:0 0;padding:0;position:relative}.task-check-btn:before{content:"";position:absolute;inset:-11px}.task-check-btn:focus-visible{outline:2px solid var(--accent);outline-offset:3px}.task-row.is-done .task-check{background:var(--accent);border-color:var(--accent);animation:.3s pop}.task-row.is-done .task-check svg{opacity:1;transform:scale(1)}.task-main{flex:1;align-items:center;gap:8px;min-width:0;display:flex}.task-tag{white-space:nowrap;background:0 0;border:1px solid #0000;border-radius:5px;flex:none;padding:1px 6px;font-size:10.5px;font-weight:600;line-height:1.45}.task-tag.tag-fuzzy{color:var(--tip-accent);background:0 0;border-color:#a8853f66}.task-tag.tag-wrong{color:var(--red);background:0 0;border-color:#b5564e66}.task-tag.tag-accent{color:var(--accent);background:0 0;border-color:#66087459}.task-text{flex:1;min-width:0}.task-label{color:var(--text);font-size:14.5px;font-weight:500;line-height:1.45;transition:color .2s}.task-row.is-done .task-label{color:var(--text-strike);text-decoration:line-through;-webkit-text-decoration-color:var(--border-bold);-webkit-text-decoration-color:var(--border-bold);-webkit-text-decoration-color:var(--border-bold);text-decoration-color:var(--border-bold)}.task-sublabel{color:var(--text-soft);margin-top:2px;font-size:11.5px;line-height:1.45}.task-trailing{color:var(--text-faint);flex-shrink:0;font-size:12.5px}.task-row.is-done .task-trailing{color:var(--text-soft)}.progress-ring{width:var(--ring-size,88px);height:var(--ring-size,88px);flex:none;position:relative}.progress-ring-fill{stroke-dasharray:var(--ring-dasharray);stroke-dashoffset:var(--ring-dashoffset);transition:stroke-dashoffset .55s cubic-bezier(.22,1,.36,1)}.progress-ring-center{flex-direction:column;justify-content:center;align-items:center;display:flex;position:absolute;inset:0}.progress-ring-count{color:var(--text);letter-spacing:-.02em;font-size:21px;font-weight:700;line-height:1}.progress-ring-label{color:var(--text-soft);margin-top:1px;font-size:10px;line-height:1.2}.fold-block{border:1px solid var(--border);border-radius:11px;margin-top:12px;padding:11px 13px}.fold-boost{border-color:var(--accent)}@supports (color:color-mix(in lab, red, red)){.fold-boost{border-color:color-mix(in srgb, var(--accent) 22%, transparent)}}.fold-boost{border-left:3px solid var(--accent);background:var(--boost-bg)}.fold-think{border-color:var(--tip-accent)}@supports (color:color-mix(in lab, red, red)){.fold-think{border-color:color-mix(in srgb, var(--tip-accent) 28%, transparent)}}.fold-think{background:var(--tip-bg-think)}.fold-toc{background:0 0}.fold-header{cursor:pointer;background:0 0;border:0;justify-content:space-between;align-items:center;gap:10px;width:100%;padding:0;font-family:inherit;display:flex}.fold-heading{align-items:center;gap:8px;min-width:0;display:inline-flex}.fold-label{border-radius:5px;flex:none;padding:2px 7px;font-size:11px;font-weight:700;line-height:1.35}.fold-boost .fold-label{background:var(--accent);color:var(--text-on-accent)}.fold-think .fold-label{background:var(--tip-accent)}@supports (color:color-mix(in lab, red, red)){.fold-think .fold-label{background:color-mix(in srgb, var(--tip-accent) 12%, transparent)}}.fold-think .fold-label{color:var(--tip-accent-dark)}.fold-toc .fold-label{background:var(--bg-soft);color:var(--text-muted)}.fold-title{color:var(--text);font-size:14px;font-weight:600;line-height:1.45}.fold-boost .fold-title{color:var(--boost-title)}.fold-think .fold-title{color:var(--tip-title)}.fold-caret{flex-shrink:0;transition:transform .2s}.fold-open .fold-caret{transform:rotate(90deg)}.mark-buttons{gap:6px;display:inline-flex}.mark-pill{border:1px solid var(--border-strong);cursor:pointer;-webkit-tap-highlight-color:transparent;background:0 0;border-radius:8px;padding:4px 8px;font-size:11.5px;font-weight:600;line-height:1.35;transition:color .15s,background .15s,border-color .15s}.mark-dontknow{color:var(--red)}.mark-confused{color:var(--tip-accent)}.mark-done{color:var(--accent)}.mark-dontknow.mark-pill-active{border-color:var(--red);background:var(--red);color:var(--text-on-accent)}.mark-confused.mark-pill-active{border-color:var(--tip-accent);background:var(--tip-accent);color:var(--text-on-accent)}.mark-done.mark-pill-active{border-color:var(--accent);background:var(--accent);color:var(--text-on-accent)}.quiz-card{margin-top:13px}.quiz-card-meta{flex-wrap:wrap;align-items:center;gap:8px;display:flex}.quiz-card-source,.quiz-card-badge{white-space:nowrap;border-radius:6px;padding:3px 8px;font-size:11px;font-weight:700;line-height:1.4}.quiz-card-source,.quiz-card-badge.badge-muted{background:var(--chip-bg);color:var(--text-muted)}.quiz-card-badge.badge-accent{background:var(--accent-bg);color:var(--accent)}.quiz-card-badge.badge-fuzzy{background:var(--tip-accent)}@supports (color:color-mix(in lab, red, red)){.quiz-card-badge.badge-fuzzy{background:color-mix(in srgb, var(--tip-accent) 13%, transparent)}}.quiz-card-badge.badge-fuzzy{color:var(--tip-accent)}.quiz-card-stem{color:var(--text);margin-top:11px;font-size:14.5px;line-height:1.7}.quiz-card-options{flex-direction:column;gap:9px;margin-top:13px;display:flex}.quiz-card-option{border:1px solid var(--border-strong);background:var(--bg-elev);cursor:pointer;border-radius:12px;align-items:center;gap:11px;padding:12px 14px;transition:background .15s,border-color .15s;display:flex}.quiz-card-option.is-picked,.quiz-card-option.is-correct{border-color:var(--accent);background:var(--accent-soft)}.quiz-card-option.is-wrong{border-color:var(--red);background:var(--red-bg)}.quiz-card-option-letter{border:1.5px solid var(--border-strong);width:22px;height:22px;color:var(--text);border-radius:999px;flex:none;place-items:center;font-size:12px;font-weight:700;line-height:1;transition:color .15s,background .15s,border-color .15s;display:grid}.quiz-card-option.is-picked .quiz-card-option-letter,.quiz-card-option.is-correct .quiz-card-option-letter{border-color:var(--accent);background:var(--accent);color:var(--text-on-accent)}.quiz-card-option.is-wrong .quiz-card-option-letter{border-color:var(--red);background:var(--red);color:var(--text-on-accent)}.quiz-card-option-text{color:var(--text);font-size:14.5px}.quiz-card-submit{background:var(--accent);width:100%;color:var(--text-on-accent);text-align:center;box-shadow:none;cursor:pointer;border:0;border-radius:12px;margin-top:13px;padding:13px;font-family:inherit;font-size:14.5px;font-weight:700;transition:opacity .2s,background .2s}.quiz-card-submit:disabled{opacity:.5;cursor:not-allowed}.quiz-card-feedback{margin-top:11px;font-size:13px;font-weight:700;line-height:1.6}.quiz-card-feedback.is-correct{color:var(--accent)}.quiz-card-feedback.is-wrong{color:var(--red)}.quiz-card-explanation{background:var(--bg-soft);color:var(--text-2);border-radius:12px;margin-top:11px;padding:13px;font-size:13px;line-height:1.75}.article{width:100%;margin:0 auto}.article h1{color:var(--text);letter-spacing:-.01em;margin:0;font-size:29px;font-weight:700;line-height:1.2}.article .lead{color:var(--text-2);margin:12px 0 0;font-size:15px;line-height:1.7}.reader-progress-card{border:1px solid var(--border);background:var(--bg-elev);box-shadow:var(--shadow-sm);border-radius:16px;margin:18px 0;padding:15px 16px}.rpc-head{justify-content:space-between;align-items:center;gap:10px;display:flex}.rpc-stats{color:var(--text-muted);font-size:13px}.rpc-stats b{color:var(--accent);font-weight:700}.rpc-pos{color:var(--text-subtle);font-size:12px}.rpc-track{background:var(--border);border-radius:4px;height:7px;margin-top:10px;overflow:hidden}.rpc-fill{background:var(--accent);border-radius:4px;height:100%;transition:width .4s}.rpc-toc-toggle{cursor:pointer;color:var(--accent);background:0 0;border:none;align-items:center;gap:7px;margin-top:13px;padding:0;font-family:inherit;font-size:13px;font-weight:600;display:flex}.rpc-toc-caret{transition:transform .2s}.rpc-toc-caret.is-open{transform:rotate(90deg)}.rpc-reset{color:var(--text-subtle);cursor:pointer;background:0 0;border:none;border-radius:6px;margin-top:8px;padding:6px 10px;font-family:inherit;font-size:11.5px}.rpc-toc-list{border-top:1px solid var(--border-soft);margin-top:10px;padding-top:6px}.rpc-toc-item{color:var(--text-2);border-bottom:1px solid var(--border-soft);padding:8px 0;font-size:13.5px;line-height:1.4;text-decoration:none;display:block}.rpc-toc-item:last-child{border-bottom:none}.rpc-toc-item.done{color:var(--text-subtle)}.rpc-toc-item.done:after{content:"✓";float:right;color:var(--accent);font-size:12px;font-weight:700}.prose{gap:14px;display:grid}.kp-section{background:var(--bg-elev);border:1px solid var(--border);box-shadow:var(--shadow-sm);border-radius:18px;margin:0;padding:16px 16px 18px;overflow:hidden}.kp-section+.kp-section{margin-top:0}.kp-section .kp-one-line,.article>.kp-one-line{background:var(--ink-block-fg);color:var(--boost-title);border-radius:12px;margin-top:13px;padding:12px 14px;font-size:13.5px;line-height:1.65}.kp-section .kp-one-line strong,.article>.kp-one-line strong{color:var(--accent)}.article h2{color:var(--text);letter-spacing:0;border:0;align-items:flex-start;gap:7px;margin:0 0 12px;padding:0;font-size:18px;font-weight:700;line-height:1.35;display:flex}.article h2 .sec-icon{color:var(--accent);flex-shrink:0;margin-top:1px}.article h2.markable .h2-marks{flex:none;order:2;gap:5px;margin-left:auto;display:inline-flex}.mark-btn{border:1px solid var(--border-strong);color:var(--text-muted);white-space:nowrap;cursor:pointer;-webkit-tap-highlight-color:transparent;background:0 0;border-radius:8px;justify-content:center;align-items:center;padding:4px 8px;font-size:11px;font-weight:600;transition:all .15s;display:inline-flex}.dontknow-btn:before{content:"不会"}.confused-btn:before{content:"模糊"}.done-btn:before{content:"掌握"}.dontknow-btn.active{background:var(--red);border-color:var(--red);color:var(--text-on-accent)}.confused-btn.active{background:var(--tip-accent);border-color:var(--tip-accent);color:var(--text-on-accent)}.done-btn.active{background:var(--accent);border-color:var(--accent);color:var(--text-on-accent)}@keyframes pop{0%{transform:scale(.55)}55%{transform:scale(1.18)}to{transform:scale(1)}}.mark-btn.is-popping{animation:.3s pop}.article h3{color:var(--text);margin:17px 0 8px;font-size:15.5px;font-weight:700;line-height:1.45}.article p,.article li{color:var(--text-2);font-size:13.5px;line-height:1.7}.article p{margin:8px 0}.article ul,.article ol{margin:9px 0;padding-left:20px}.fold,.fold-block{border-radius:11px!important}.fold-boost,.fold.boost,.article .boost{border-left:3px solid var(--accent)!important;background:var(--boost-bg)!important}.fold-think,.fold.why,.fold.think,.callout.c-think{background:var(--tip-bg-think)!important;border-color:var(--tip-accent)!important}@supports (color:color-mix(in lab, red, red)){.fold-think,.fold.why,.fold.think,.callout.c-think{border-color:color-mix(in srgb, var(--tip-accent) 28%, transparent)!important}}.article blockquote{border-left:3px solid var(--border-strong);color:var(--text-ink);background:0 0;border-radius:0;margin:12px 0;padding:2px 0 2px 13px;font-size:13.5px;line-height:1.7}.article table{font-size:13.5px}.article code:not(pre code){background:var(--bg-soft);color:var(--accent-dark);border-radius:6px;padding:1px 5px}.exam-quiz,.quiz-card,.challenge-card,.rq-q{border:1px solid var(--border)!important;background:var(--bg-elev)!important;box-shadow:var(--shadow-sm)!important;border-radius:16px!important}.article .eq-submit-btn,.challenge-btn.primary,.rq-reveal-btn,.rq-more{background:var(--accent);min-height:42px;color:var(--text-on-accent);box-shadow:none;border-radius:12px;font-weight:700}.article .eq-opt.selected,.challenge-opt.selected{border-color:var(--accent)!important;background:var(--accent-soft)!important}.article .eq-opt.correct,.challenge-opt.correct{border-color:var(--accent)!important;background:var(--accent)!important;color:var(--text-on-accent)!important}.article .eq-opt.correct .katex,.challenge-opt.correct .katex{color:var(--text-on-accent)!important}.article .eq-opt.wrong,.article .eq-opt.eliminated{border-color:var(--red)!important;background:var(--red-bg)!important;color:var(--red)!important}.rq{margin-top:16px}.rq-head{margin-bottom:8px}.rq-title{color:var(--text);font-size:17px;font-weight:700}.rq-note{color:var(--text-muted);font-size:13px;line-height:1.7}.signature,.kp-chapter-context,.kp-nav{margin-top:18px}.kp-nav{grid-template-columns:1fr 1fr;gap:11px;display:grid}.kp-nav-btn{border:1px solid var(--border);background:var(--bg-elev);min-width:0;box-shadow:var(--shadow-sm);border-radius:13px;padding:13px 14px}.kp-nav-title{color:var(--text);font-size:13.5px;font-weight:600;line-height:1.35}.mistake-shell,.stats,.login-shell,.plans-shell,.landing-shell,.profile-shell,.vocab-shell{box-sizing:border-box;width:100%;max-width:760px;margin-left:auto;margin-right:auto;padding-left:20px;padding-right:20px}.plans-shell{max-width:680px}.vocab-shell{max-width:760px;padding-top:20px}.subj-title{color:var(--text);letter-spacing:-.01em;font-size:26px;font-weight:700;line-height:1.18}.profile-section-sub,.landing-sub{color:var(--text-muted);font-size:13.5px;line-height:1.7}.subj-chapter,.stats-card,.stat-card,.plans-feature,.vc-list,.empty-state,.error-state{border:1px solid var(--border)!important;background:var(--bg-elev)!important;box-shadow:var(--shadow-sm)!important;border-radius:16px!important}.stat-card.accent{border:none!important}.rq-src,.rq-type{border-radius:6px;font-size:10.5px;font-weight:700}.profile-label{color:var(--text-soft);letter-spacing:.07em;margin:22px 2px 9px;font-size:12px;font-weight:700;line-height:1.4}.subj-point{min-height:44px}.subj-point-dot.learned,.nav-point-dot.learned,.nav-chapter-bar-fill.complete{background:var(--accent);border-color:var(--accent)}.mi-action-buttons{flex-wrap:wrap;justify-content:flex-end;gap:8px;display:flex}.profile-section-link,.profile-link{border-radius:9px;min-height:34px;padding:0 12px;font-size:12px;font-weight:700}.vc-search,.admin-search-input,.admin-select{border:1px solid var(--border-strong);background:var(--bg-elev);border-radius:13px;min-height:48px}.login-input:focus,.vc-search:focus{border-color:var(--accent);outline:none}.login-submit-btn,.landing-btn-primary,.plan-card-cta,.vc-btn.primary{background:var(--accent);min-height:48px;color:var(--text-on-accent);box-shadow:var(--shadow-accent);border-radius:14px;font-weight:700}.landing-features,.landing-subject-grid{grid-template-columns:1fr;gap:12px}.stats-grid,.stats-grid-3{gap:10px}.stat-card,.stats-card{padding:15px 14px!important}.stat-card b,.stats-card b{color:var(--accent)}.plans-grid,.plans-features{grid-template-columns:1fr;gap:12px}.plan-card-recommended *{color:inherit}.plans-feature-icon,.profile-action-icon{color:var(--accent);background:var(--accent-soft)}.profile-shell{padding:0 0 60px!important}.profile-hero{border:1px solid var(--border)!important;background:var(--bg-elev)!important;box-shadow:var(--shadow-lg)!important;border-radius:20px!important}.profile-overview-item{background:var(--bg-soft);border-radius:14px}.profile-overview-item b{color:var(--accent)}.vc-stats{gap:9px}.vc-stat{border-radius:14px}.vc-card{min-height:188px;border-radius:22px!important}.vc-btn{border-radius:14px;min-height:44px}.vc-btn.good{background:var(--accent);border-color:var(--accent)}.vc-done-mark{background:var(--accent-soft);color:var(--accent)}.home-1b,.article,.search-shell,.mistake-shell,.subj-shell,.stats,.login-shell,.plans-shell,.landing-shell,.profile-shell,.vocab-shell,.drawer{overflow-wrap:anywhere}@media (width<=360px){.main{padding-left:16px;padding-right:16px}.home-topbar,.home-content{padding-left:18px;padding-right:18px}.home-h1{font-size:24px}.article,.search-shell,.mistake-shell,.subj-shell,.stats,.login-shell,.plans-shell,.landing-shell,.profile-shell,.vocab-shell{max-width:calc(100vw - 32px)!important}}.reader-progress-card{border-radius:var(--radius-md);padding:16px}.reader-progress-card .rpc-head{align-items:center}.reader-progress-card .rpc-stats{color:var(--text-2);font-size:13px}.reader-progress-card .rpc-stats b{color:var(--accent)}.reader-progress-card .rpc-pos{color:var(--text-soft);font-size:12px}.reader-progress-card .rpc-track{background:var(--bg-soft);border-radius:999px;height:8px;margin-top:12px}.reader-progress-card .rpc-fill{border-radius:999px}.reader-progress-card .rpc-toc-toggle{color:var(--accent);margin-top:12px;font-size:13px}.reader-progress-card .rpc-toc-caret{transition:transform .2s}.reader-progress-card .rpc-toc-caret.is-open{transform:rotate(90deg)}.kp-section .kp-one-line,.article>.kp-one-line{background:var(--accent-soft);border-left:3px solid var(--accent);color:var(--accent-dark);border-radius:10px;margin-top:14px;padding:12px 14px;font-size:13.5px;line-height:1.65}.kp-section .kp-one-line strong,.article>.kp-one-line strong{color:var(--accent);font-weight:700}.kp-section .kp-one-line:last-child{margin-bottom:0}.kp-section{border-radius:var(--radius-md);background:var(--bg-elev);border:1px solid var(--border);box-shadow:var(--shadow-sm);padding:16px}.kp-section>h2{letter-spacing:0;margin:0 0 12px;font-size:18px;font-weight:700;line-height:1.35}.kp-section>h2.markable{align-items:flex-start;gap:7px;display:flex}.kp-section>h2.markable .h2-marks{flex:none;order:2;margin-top:1px;margin-left:auto}.article .exam-quiz{border:1px solid var(--border);border-radius:var(--radius-md);background:var(--bg-elev);box-shadow:var(--shadow-sm);margin:12px 0 0;padding:14px 16px 16px}.article .exam-quiz .eq-meta{gap:6px;margin-bottom:10px}.article .exam-quiz .eq-source,.article .exam-quiz .eq-difficulty{border-radius:6px;padding:3px 8px;font-size:11px;font-weight:700}.article .exam-quiz .eq-source{color:var(--text-muted);background:var(--chip-bg)}.article .exam-quiz .eq-difficulty{color:var(--accent);background:var(--accent-soft)}.article .exam-quiz .eq-stem{margin-bottom:12px;font-size:14.5px;line-height:1.7}.article .exam-quiz .eq-options{gap:8px}.article .exam-quiz .eq-opt{border:1px solid var(--border-strong);background:var(--bg-elev);border-radius:12px;padding:11px 13px;font-size:14px}.article .exam-quiz .eq-opt .eq-badge{border:1.5px solid var(--border-strong);width:24px;height:24px;font-size:12px}.article .exam-quiz .eq-submit-btn{border-radius:12px;min-height:44px;font-size:14.5px;font-weight:700}.article .exam-quiz .eq-reveal{border-top:1px dashed var(--border)}.article .exam-quiz .eq-rv{border-radius:10px}.kp-nav-btn{background:var(--bg-elev);border:1px solid var(--border);min-height:64px;box-shadow:var(--shadow-sm);border-radius:13px;align-items:center;gap:9px;padding:13px 14px;text-decoration:none;transition:all .16s;display:flex}.kp-nav-btn.disabled{opacity:.55;cursor:not-allowed;pointer-events:none;border-color:var(--border);background:var(--bg-soft);box-shadow:none}.moti-h3{flex-wrap:wrap;align-items:center;gap:8px;margin:0 0 10px;display:flex}.moti-h3 .h3-marks{order:3;margin-left:auto}.moti-title{color:var(--text);font-size:14.5px;font-weight:700;line-height:1.35}.moti-tag{white-space:nowrap;border-radius:6px;align-items:center;padding:2px 7px;font-size:10.5px;font-weight:600;display:inline-flex}.moti-easy{color:var(--accent);background:var(--accent-bg)}.moti-mid{color:var(--tip-accent-dark);background:var(--tip-accent)}@supports (color:color-mix(in lab, red, red)){.moti-mid{background:color-mix(in srgb, var(--tip-accent) 13%, transparent)}}.moti-hard{color:var(--red);background:var(--red-bg)}.xuanniu-line{margin:9px 0;font-size:13px;line-height:1.7;display:block}.xuanniu-chip{color:var(--accent);background:var(--accent-soft);white-space:nowrap;border-radius:8px;align-items:center;margin-bottom:5px;padding:4px 10px;font-size:12px;font-weight:600;display:inline-flex}.xuanniu-body{color:var(--text-2);display:block}.xuanniu-body .katex{color:var(--text)}.xinkeng-line{color:var(--red);align-items:flex-start;gap:6px;margin-top:10px;font-size:12px;line-height:1.6;display:flex}.xinkeng-label{flex:none;font-weight:700}.xinkeng-body{color:var(--red);flex:1}.xinkeng-body .katex{color:var(--red)}.iron-rule-item{align-items:flex-start;gap:9px;margin:7px 0;font-size:13px;line-height:1.7;display:flex}.iron-rule-item:first-child{margin-top:0}.iron-rule-item:last-child{margin-bottom:0}.iron-rule-num{color:var(--text);text-align:center;flex:none;min-width:1.3em;font-weight:700}.iron-rule-body{color:var(--text-2);flex:1}.iron-rule-body .katex{color:var(--text)}.jimu-h3{align-items:center;gap:11px;margin:15px 0 8px;display:flex}.jimu-h3 .h3-marks{order:3;margin-left:auto}.jimu-badge{background:var(--accent-soft);width:26px;height:26px;color:var(--accent);border-radius:50%;flex:none;justify-content:center;align-items:center;font-size:14px;font-weight:700;display:inline-flex}.jimu-title{color:var(--text);font-size:15px;font-weight:700;line-height:1.35}.card-fold{border:1px solid var(--border);background:var(--bg-elev);border-radius:11px;margin-top:14px;overflow:hidden}.card-fold>summary{cursor:pointer;-webkit-user-select:none;user-select:none;align-items:center;gap:9px;padding:11px 13px;list-style:none;display:flex}.card-fold>summary::-webkit-details-marker{display:none}.card-fold>summary:before{content:"";opacity:.55;border-bottom:1.6px solid;border-right:1.6px solid;flex-shrink:0;width:6px;height:6px;margin-left:auto;transition:transform .18s;transform:rotate(-45deg)}.card-fold[open]>summary:before{transform:rotate(45deg)}.card-fold .fold-label{white-space:nowrap;border-radius:6px;flex:none;padding:3px 7px;font-size:10.5px;font-weight:700}.card-fold .fold-title{flex:1;font-size:13px;font-weight:600;line-height:1.45}.card-fold>.fold-body{margin:0 13px 13px}.card-fold[open]>.fold-body{margin-top:8px}.card-fold>.fold-body>:first-child{margin-top:0}.card-fold>.fold-body>:last-child{margin-bottom:0}.card-fold.fold-boost{background:var(--boost-bg);border-color:var(--accent)}@supports (color:color-mix(in lab, red, red)){.card-fold.fold-boost{border-color:color-mix(in srgb, var(--accent) 22%, transparent)}}.card-fold.fold-boost{border-left:3px solid var(--accent)}.card-fold.fold-boost>summary{color:var(--boost-title)}.card-fold.fold-boost .fold-label{background:var(--accent);color:var(--text-on-accent)}.card-fold.fold-boost .fold-title{color:var(--boost-title)}.card-fold.fold-boost>.fold-body{background:var(--boost-bg);border-radius:10px;padding:12px}@supports (color:color-mix(in lab, red, red)){.card-fold.fold-boost>.fold-body{background:color-mix(in srgb, var(--boost-bg) 80%, transparent)}}.card-fold.fold-boost>.fold-body{color:var(--text-2);font-size:13px;line-height:1.75}.card-fold.fold-why,.card-fold.fold-think{background:var(--tip-bg-think);border-color:var(--tip-accent)}@supports (color:color-mix(in lab, red, red)){.card-fold.fold-why,.card-fold.fold-think{border-color:color-mix(in srgb, var(--tip-accent) 28%, transparent)}}.card-fold.fold-why>summary,.card-fold.fold-think>summary{color:var(--tip-title)}.card-fold.fold-why .fold-label,.card-fold.fold-think .fold-label{background:var(--tip-accent)}@supports (color:color-mix(in lab, red, red)){.card-fold.fold-why .fold-label,.card-fold.fold-think .fold-label{background:color-mix(in srgb, var(--tip-accent) 16%, transparent)}}.card-fold.fold-why .fold-label,.card-fold.fold-think .fold-label{color:var(--tip-accent-dark)}.card-fold.fold-why .fold-title,.card-fold.fold-think .fold-title{color:var(--tip-title)}.card-fold.fold-why>.fold-body,.card-fold.fold-think>.fold-body{color:var(--text-2);background:#fdfbf6;border-radius:10px;padding:12px;font-size:13px;line-height:1.75}.card-fold.fold-note{background:var(--bg-soft);border:none;border-left:3px solid var(--border-strong);border-radius:0 10px 10px 0}.card-fold.fold-note>summary{color:var(--text-2)}.card-fold.fold-note .fold-label{background:var(--border-strong);color:var(--bg-elev)}.card-fold.fold-note .fold-title{color:var(--text-2)}.kp-section{border-radius:18px;padding:16px 16px 18px}.kp-section .exam-quiz{box-shadow:none;background:0 0;border:none;border-radius:0;margin:13px 0 0;padding:0}.kp-section .exam-quiz .eq-meta{flex-wrap:wrap;align-items:center;gap:8px;margin:0 0 11px;display:flex}.kp-section .exam-quiz .eq-source,.kp-section .exam-quiz .eq-difficulty{white-space:nowrap;border-radius:6px;padding:3px 8px;font-size:11px;font-weight:600}.kp-section .exam-quiz .eq-source{color:var(--text-muted);background:var(--chip-bg)}.kp-section .exam-quiz .eq-difficulty{color:var(--accent);background:var(--accent-bg)}.kp-section .exam-quiz .eq-stem{color:var(--text);margin:11px 0 0;font-size:14.5px;line-height:1.7}.kp-section .exam-quiz .eq-options{flex-direction:column;gap:9px;margin-top:13px;display:flex}.kp-section .exam-quiz .eq-opt{background:var(--bg-elev);color:var(--text);border:1px solid #0000001f;border-radius:12px;align-items:center;gap:11px;padding:12px 14px;font-size:14.5px;line-height:1.6;display:flex}.kp-section .exam-quiz .eq-opt:hover:not(.locked):not(.eliminated){border-color:var(--accent-soft);background:var(--accent-bg)}.kp-section .exam-quiz .eq-opt .eq-badge{width:22px;height:22px;color:var(--text-2);background:var(--bg-elev);border:1.5px solid #0000002e;border-radius:50%;flex:none;justify-content:center;align-items:center;font-size:12px;font-weight:700;display:inline-flex}.kp-section .exam-quiz .eq-opt.selected .eq-badge,.kp-section .exam-quiz .eq-opt.correct .eq-badge,.kp-section .exam-quiz .eq-opt.wrong .eq-badge{border-color:currentColor}.kp-section .exam-quiz .eq-submit-btn{border-radius:12px;width:100%;min-height:auto;margin-top:13px;padding:13px;font-size:14.5px;font-weight:700}.kp-section .exam-quiz .eq-feedback{margin-top:11px;font-size:13px;font-weight:600}.kp-section .exam-quiz .eq-reveal{border-top:none;flex-direction:column;gap:11px;margin-top:11px;padding-top:0;display:flex}.kp-section .exam-quiz .eq-rv{background:#f7f6f2;border:none;border-radius:12px;padding:13px}.kp-section .exam-quiz .eq-rv-label{margin-bottom:6px;font-size:13px;font-weight:700}.kp-section .exam-quiz .eq-rv-body{color:var(--text-2);font-size:13px;line-height:1.75}.kp-section .exam-quiz .eq-rv-answer .eq-rv-body{color:var(--text);font-size:15px;font-weight:700}.kp-nav{grid-template-columns:1fr 1fr;gap:11px;margin-top:18px;display:grid}.kp-nav-btn{background:var(--bg-elev);min-height:64px;box-shadow:var(--shadow-sm);border:1px solid #0000001a;border-radius:13px;align-items:center;gap:9px;padding:13px 14px;text-decoration:none;transition:all .16s;display:flex}.kp-nav-btn:hover{border-color:var(--accent);background:var(--accent-bg)}.kp-nav-btn.prev{justify-content:flex-start}.kp-nav-btn.next{text-align:right;justify-content:flex-end}.kp-nav-btn.disabled{opacity:.55;cursor:not-allowed;pointer-events:none;background:var(--bg-soft);box-shadow:none;border-color:#0000001a}.kp-nav-arrow{color:var(--text-subtle);flex-shrink:0;align-items:center;font-size:18px;display:flex}.kp-nav-btn.next .kp-nav-arrow,.kp-nav-btn:hover .kp-nav-arrow{color:var(--accent)}.kp-nav-btn.disabled .kp-nav-arrow{color:var(--text-subtle)!important}.kp-nav-text{flex-direction:column;gap:3px;min-width:0;display:flex}.kp-nav-label{color:var(--text-soft);font-size:11px}.kp-nav-title{color:var(--text);text-overflow:ellipsis;white-space:nowrap;font-size:13.5px;font-weight:600;line-height:1.35;overflow:hidden}.kp-nav-btn:hover .kp-nav-title{color:var(--accent)}.kp-nav-btn.disabled .kp-nav-title{color:var(--text)}@property --tw-rotate-x{syntax:"*";inherits:false}@property --tw-rotate-y{syntax:"*";inherits:false}@property --tw-rotate-z{syntax:"*";inherits:false}@property --tw-skew-x{syntax:"*";inherits:false}@property --tw-skew-y{syntax:"*";inherits:false}@property --tw-blur{syntax:"*";inherits:false}@property --tw-brightness{syntax:"*";inherits:false}@property --tw-contrast{syntax:"*";inherits:false}@property --tw-grayscale{syntax:"*";inherits:false}@property --tw-hue-rotate{syntax:"*";inherits:false}@property --tw-invert{syntax:"*";inherits:false}@property --tw-opacity{syntax:"*";inherits:false}@property --tw-saturate{syntax:"*";inherits:false}@property --tw-sepia{syntax:"*";inherits:false}@property --tw-drop-shadow{syntax:"*";inherits:false}@property --tw-drop-shadow-color{syntax:"*";inherits:false}@property --tw-drop-shadow-alpha{syntax:"<percentage>";inherits:false;initial-value:100%}@property --tw-drop-shadow-size{syntax:"*";inherits:false}