@font-face{font-display:block;font-family:KaTeX_AMS;font-style:normal;font-weight:400;src:url(/knowledge/assets/KaTeX_AMS-Regular-BQhdFMY1.woff2) format("woff2"),url(/knowledge/assets/KaTeX_AMS-Regular-DMm9YOAa.woff) format("woff"),url(/knowledge/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(/knowledge/assets/KaTeX_Caligraphic-Bold-Dq_IR9rO.woff2) format("woff2"),url(/knowledge/assets/KaTeX_Caligraphic-Bold-BEiXGLvX.woff) format("woff"),url(/knowledge/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(/knowledge/assets/KaTeX_Caligraphic-Regular-Di6jR-x-.woff2) format("woff2"),url(/knowledge/assets/KaTeX_Caligraphic-Regular-CTRA-rTL.woff) format("woff"),url(/knowledge/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(/knowledge/assets/KaTeX_Fraktur-Bold-CL6g_b3V.woff2) format("woff2"),url(/knowledge/assets/KaTeX_Fraktur-Bold-BsDP51OF.woff) format("woff"),url(/knowledge/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(/knowledge/assets/KaTeX_Fraktur-Regular-CTYiF6lA.woff2) format("woff2"),url(/knowledge/assets/KaTeX_Fraktur-Regular-Dxdc4cR9.woff) format("woff"),url(/knowledge/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(/knowledge/assets/KaTeX_Main-Bold-Cx986IdX.woff2) format("woff2"),url(/knowledge/assets/KaTeX_Main-Bold-Jm3AIy58.woff) format("woff"),url(/knowledge/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(/knowledge/assets/KaTeX_Main-BoldItalic-DxDJ3AOS.woff2) format("woff2"),url(/knowledge/assets/KaTeX_Main-BoldItalic-SpSLRI95.woff) format("woff"),url(/knowledge/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(/knowledge/assets/KaTeX_Main-Italic-NWA7e6Wa.woff2) format("woff2"),url(/knowledge/assets/KaTeX_Main-Italic-BMLOBm91.woff) format("woff"),url(/knowledge/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(/knowledge/assets/KaTeX_Main-Regular-B22Nviop.woff2) format("woff2"),url(/knowledge/assets/KaTeX_Main-Regular-Dr94JaBh.woff) format("woff"),url(/knowledge/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(/knowledge/assets/KaTeX_Math-BoldItalic-CZnvNsCZ.woff2) format("woff2"),url(/knowledge/assets/KaTeX_Math-BoldItalic-iY-2wyZ7.woff) format("woff"),url(/knowledge/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(/knowledge/assets/KaTeX_Math-Italic-t53AETM-.woff2) format("woff2"),url(/knowledge/assets/KaTeX_Math-Italic-DA0__PXp.woff) format("woff"),url(/knowledge/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(/knowledge/assets/KaTeX_SansSerif-Bold-D1sUS0GD.woff2) format("woff2"),url(/knowledge/assets/KaTeX_SansSerif-Bold-DbIhKOiC.woff) format("woff"),url(/knowledge/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(/knowledge/assets/KaTeX_SansSerif-Italic-C3H0VqGB.woff2) format("woff2"),url(/knowledge/assets/KaTeX_SansSerif-Italic-DN2j7dab.woff) format("woff"),url(/knowledge/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(/knowledge/assets/KaTeX_SansSerif-Regular-DDBCnlJ7.woff2) format("woff2"),url(/knowledge/assets/KaTeX_SansSerif-Regular-CS6fqUqJ.woff) format("woff"),url(/knowledge/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(/knowledge/assets/KaTeX_Script-Regular-D3wIWfF6.woff2) format("woff2"),url(/knowledge/assets/KaTeX_Script-Regular-D5yQViql.woff) format("woff"),url(/knowledge/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(/knowledge/assets/KaTeX_Size1-Regular-mCD8mA8B.woff2) format("woff2"),url(/knowledge/assets/KaTeX_Size1-Regular-C195tn64.woff) format("woff"),url(/knowledge/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(/knowledge/assets/KaTeX_Size2-Regular-Dy4dx90m.woff2) format("woff2"),url(/knowledge/assets/KaTeX_Size2-Regular-oD1tc_U0.woff) format("woff"),url(/knowledge/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(/knowledge/assets/KaTeX_Size3-Regular-CTq5MqoE.woff) format("woff"),url(/knowledge/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(/knowledge/assets/KaTeX_Size4-Regular-Dl5lxZxV.woff2) format("woff2"),url(/knowledge/assets/KaTeX_Size4-Regular-BF-4gkZK.woff) format("woff"),url(/knowledge/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(/knowledge/assets/KaTeX_Typewriter-Regular-CO6r4hn1.woff2) format("woff2"),url(/knowledge/assets/KaTeX_Typewriter-Regular-C0xS9mPB.woff) format("woff"),url(/knowledge/assets/KaTeX_Typewriter-Regular-D3Ib7_Hf.ttf) format("truetype")}.katex{font: 1.21em KaTeX_Main,Times New Roman,serif;line-height:1.2;position:relative;text-indent:0;text-rendering:auto}.katex *{-ms-high-contrast-adjust:none!important;border-color:currentColor}.katex .katex-version:after{content:"0.16.47"}.katex .katex-mathml{border:0;-webkit-clip-path:inset(50%);clip-path:inset(50%);height:1px;overflow:hidden;padding:0;position:absolute;width:1px}.katex .katex-html>.newline{display:block}.katex .base{position:relative;white-space:nowrap;width:-webkit-min-content;width:-moz-min-content;width:min-content}.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;display:inline-table;table-layout:fixed}.katex .vlist-r{display:table-row}.katex .vlist{display:table-cell;position:relative;vertical-align:bottom}.katex .vlist>span{display:block;height:0;position:relative}.katex .vlist>span>span{display:inline-block}.katex .vlist>span>.pstrut{overflow:hidden;width:0}.katex .vlist-t2{margin-right:-2px}.katex .vlist-s{display:table-cell;font-size:1px;min-width:2px;vertical-align:bottom;width:2px}.katex .vbox{align-items:baseline;display:inline-flex;flex-direction:column}.katex .hbox{width:100%}.katex .hbox,.katex .thinbox{display:inline-flex;flex-direction:row}.katex .thinbox{max-width:0;width:0}.katex .msupsub{text-align:left}.katex .mfrac>span>span{text-align:center}.katex .mfrac .frac-line{border-bottom-style:solid;display:inline-block;width:100%}.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{display:inline;line-height:0}.katex .clap,.katex .llap,.katex .rlap{position:relative;width:0}.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;display:inline-block;width:100%}.katex .hdashline{border-bottom-style:dashed;display:inline-block;width:100%}.katex .sqrt>.root{margin-left:.2777777778em;margin-right:-.5555555556em}.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:.8333333333em}.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:1.1666666667em}.katex .fontsize-ensurer.reset-size2.size4,.katex .sizing.reset-size2.size4{font-size:1.3333333333em}.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:1.6666666667em}.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:3.4566666667em}.katex .fontsize-ensurer.reset-size2.size11,.katex .sizing.reset-size2.size11{font-size:4.1466666667em}.katex .fontsize-ensurer.reset-size3.size1,.katex .sizing.reset-size3.size1{font-size:.7142857143em}.katex .fontsize-ensurer.reset-size3.size2,.katex .sizing.reset-size3.size2{font-size:.8571428571em}.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:1.1428571429em}.katex .fontsize-ensurer.reset-size3.size5,.katex .sizing.reset-size3.size5{font-size:1.2857142857em}.katex .fontsize-ensurer.reset-size3.size6,.katex .sizing.reset-size3.size6{font-size:1.4285714286em}.katex .fontsize-ensurer.reset-size3.size7,.katex .sizing.reset-size3.size7{font-size:1.7142857143em}.katex .fontsize-ensurer.reset-size3.size8,.katex .sizing.reset-size3.size8{font-size:2.0571428571em}.katex .fontsize-ensurer.reset-size3.size9,.katex .sizing.reset-size3.size9{font-size:2.4685714286em}.katex .fontsize-ensurer.reset-size3.size10,.katex .sizing.reset-size3.size10{font-size:2.9628571429em}.katex .fontsize-ensurer.reset-size3.size11,.katex .sizing.reset-size3.size11{font-size:3.5542857143em}.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:.5555555556em}.katex .fontsize-ensurer.reset-size5.size2,.katex .sizing.reset-size5.size2{font-size:.6666666667em}.katex .fontsize-ensurer.reset-size5.size3,.katex .sizing.reset-size5.size3{font-size:.7777777778em}.katex .fontsize-ensurer.reset-size5.size4,.katex .sizing.reset-size5.size4{font-size:.8888888889em}.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:1.1111111111em}.katex .fontsize-ensurer.reset-size5.size7,.katex .sizing.reset-size5.size7{font-size:1.3333333333em}.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:2.3044444444em}.katex .fontsize-ensurer.reset-size5.size11,.katex .sizing.reset-size5.size11{font-size:2.7644444444em}.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:.4166666667em}.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:.5833333333em}.katex .fontsize-ensurer.reset-size7.size4,.katex .sizing.reset-size7.size4{font-size:.6666666667em}.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:.8333333333em}.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:1.7283333333em}.katex .fontsize-ensurer.reset-size7.size11,.katex .sizing.reset-size7.size11{font-size:2.0733333333em}.katex .fontsize-ensurer.reset-size8.size1,.katex .sizing.reset-size8.size1{font-size:.3472222222em}.katex .fontsize-ensurer.reset-size8.size2,.katex .sizing.reset-size8.size2{font-size:.4166666667em}.katex .fontsize-ensurer.reset-size8.size3,.katex .sizing.reset-size8.size3{font-size:.4861111111em}.katex .fontsize-ensurer.reset-size8.size4,.katex .sizing.reset-size8.size4{font-size:.5555555556em}.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:.6944444444em}.katex .fontsize-ensurer.reset-size8.size7,.katex .sizing.reset-size8.size7{font-size:.8333333333em}.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:1.4402777778em}.katex .fontsize-ensurer.reset-size8.size11,.katex .sizing.reset-size8.size11{font-size:1.7277777778em}.katex .fontsize-ensurer.reset-size9.size1,.katex .sizing.reset-size9.size1{font-size:.2893518519em}.katex .fontsize-ensurer.reset-size9.size2,.katex .sizing.reset-size9.size2{font-size:.3472222222em}.katex .fontsize-ensurer.reset-size9.size3,.katex .sizing.reset-size9.size3{font-size:.4050925926em}.katex .fontsize-ensurer.reset-size9.size4,.katex .sizing.reset-size9.size4{font-size:.462962963em}.katex .fontsize-ensurer.reset-size9.size5,.katex .sizing.reset-size9.size5{font-size:.5208333333em}.katex .fontsize-ensurer.reset-size9.size6,.katex .sizing.reset-size9.size6{font-size:.5787037037em}.katex .fontsize-ensurer.reset-size9.size7,.katex .sizing.reset-size9.size7{font-size:.6944444444em}.katex .fontsize-ensurer.reset-size9.size8,.katex .sizing.reset-size9.size8{font-size:.8333333333em}.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:1.2002314815em}.katex .fontsize-ensurer.reset-size9.size11,.katex .sizing.reset-size9.size11{font-size:1.4398148148em}.katex .fontsize-ensurer.reset-size10.size1,.katex .sizing.reset-size10.size1{font-size:.2410800386em}.katex .fontsize-ensurer.reset-size10.size2,.katex .sizing.reset-size10.size2{font-size:.2892960463em}.katex .fontsize-ensurer.reset-size10.size3,.katex .sizing.reset-size10.size3{font-size:.337512054em}.katex .fontsize-ensurer.reset-size10.size4,.katex .sizing.reset-size10.size4{font-size:.3857280617em}.katex .fontsize-ensurer.reset-size10.size5,.katex .sizing.reset-size10.size5{font-size:.4339440694em}.katex .fontsize-ensurer.reset-size10.size6,.katex .sizing.reset-size10.size6{font-size:.4821600771em}.katex .fontsize-ensurer.reset-size10.size7,.katex .sizing.reset-size10.size7{font-size:.5785920926em}.katex .fontsize-ensurer.reset-size10.size8,.katex .sizing.reset-size10.size8{font-size:.6943105111em}.katex .fontsize-ensurer.reset-size10.size9,.katex .sizing.reset-size10.size9{font-size:.8331726133em}.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:1.1996142719em}.katex .fontsize-ensurer.reset-size11.size1,.katex .sizing.reset-size11.size1{font-size:.2009646302em}.katex .fontsize-ensurer.reset-size11.size2,.katex .sizing.reset-size11.size2{font-size:.2411575563em}.katex .fontsize-ensurer.reset-size11.size3,.katex .sizing.reset-size11.size3{font-size:.2813504823em}.katex .fontsize-ensurer.reset-size11.size4,.katex .sizing.reset-size11.size4{font-size:.3215434084em}.katex .fontsize-ensurer.reset-size11.size5,.katex .sizing.reset-size11.size5{font-size:.3617363344em}.katex .fontsize-ensurer.reset-size11.size6,.katex .sizing.reset-size11.size6{font-size:.4019292605em}.katex .fontsize-ensurer.reset-size11.size7,.katex .sizing.reset-size11.size7{font-size:.4823151125em}.katex .fontsize-ensurer.reset-size11.size8,.katex .sizing.reset-size11.size8{font-size:.578778135em}.katex .fontsize-ensurer.reset-size11.size9,.katex .sizing.reset-size11.size9{font-size:.6945337621em}.katex .fontsize-ensurer.reset-size11.size10,.katex .sizing.reset-size11.size10{font-size:.8336012862em}.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{display:inline-block;width:.12em}.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{display:inline-block;min-width:1px}.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;display:block;height:inherit;position:absolute;width:100%}.katex svg path{stroke:none}.katex svg{fill-rule:nonzero;fill-opacity:1;stroke-width:1;stroke-linecap:butt;stroke-linejoin:miter;stroke-miterlimit:4;stroke-dasharray:none;stroke-dashoffset:0;stroke-opacity:1}.katex img{border-style:none;max-height:none;max-width:none;min-height:0;min-width:0}.katex .stretchy{display:block;overflow:hidden;position:relative;width:100%}.katex .stretchy:after,.katex .stretchy:before{content:""}.katex .hide-tail{overflow:hidden;position:relative;width:100%}.katex .halfarrow-left{left:0;overflow:hidden;position:absolute;width:50.2%}.katex .halfarrow-right{overflow:hidden;position:absolute;right:0;width:50.2%}.katex .brace-left{left:0;overflow:hidden;position:absolute;width:25.1%}.katex .brace-center{left:25%;overflow:hidden;position:absolute;width:50%}.katex .brace-right{overflow:hidden;position:absolute;right:0;width:25.1%}.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{border:.04em solid;box-sizing:border-box}.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{border-right:.049em solid;border-top:.049em solid;box-sizing:border-box;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{display:inline-block;position:absolute;right:calc(50% + .3em);text-align:left}.katex .cd-label-right{display:inline-block;left:calc(50% + .3em);position:absolute;text-align:right}.katex-display{display:block;margin:1em 0;text-align:center}.katex-display>.katex{display:block;text-align:center;white-space:nowrap}.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{padding-left:2em;text-align:left}body{counter-reset:katexEqnNo mmlEqnNo}:root{color-scheme:light;font-family:PingFang SC,Microsoft YaHei,Noto Sans CJK SC,system-ui,sans-serif;font-synthesis:none;--page: #f3f5f3;--surface: #ffffff;--surface-soft: #f7f9f7;--surface-hover: #eef2ef;--border: #dde4df;--border-strong: #cbd5ce;--text: #19211d;--text-soft: #455149;--muted: #778179;--faint: #a6afa8;--accent: #217a54;--accent-soft: #e5f2eb;--focus: #2878b8;--shadow: 0 10px 30px rgb(27 44 34 / 8%)}:root[data-theme=dark]{color-scheme:dark;--page: #141816;--surface: #1b211e;--surface-soft: #202722;--surface-hover: #29312c;--border: #303a34;--border-strong: #445149;--text: #eef3ef;--text-soft: #c0cac3;--muted: #939f97;--faint: #68736c;--accent: #5fc493;--accent-soft: #20382c;--focus: #70b8e9;--shadow: 0 12px 34px rgb(0 0 0 / 26%)}*{box-sizing:border-box;letter-spacing:0}html,body,#root{width:100%;min-width:320px;height:100%;margin:0}body{overflow:hidden;color:var(--text);background:var(--page);-webkit-font-smoothing:antialiased}button,input{font:inherit}button{color:inherit}button:focus-visible,input:focus-visible{outline:2px solid var(--focus);outline-offset:2px}button:disabled{cursor:not-allowed;opacity:.42}.app-shell{display:grid;grid-template-rows:auto minmax(0,1fr);width:100%;height:100dvh;min-height:620px;background:var(--page)}.app-header{position:relative;z-index:5;border-bottom:1px solid var(--border);background:color-mix(in srgb,var(--surface) 94%,transparent);box-shadow:0 2px 12px #1a281f0a;-webkit-backdrop-filter:blur(14px);backdrop-filter:blur(14px)}.topbar{display:grid;grid-template-columns:265px minmax(440px,700px) auto;align-items:center;gap:20px;height:66px;max-width:1800px;margin:0 auto;padding:0 22px}.brand{display:flex;align-items:center;min-width:0}.brand-logo{width:43px;height:43px;margin-right:11px;object-fit:contain;border-radius:6px;mix-blend-mode:multiply}:root[data-theme=dark] .brand-logo{mix-blend-mode:normal;filter:brightness(.86)}.brand div{display:grid;gap:2px}.brand strong{overflow:hidden;font-size:17px;line-height:1.3;white-space:nowrap;text-overflow:ellipsis}.brand span{color:var(--muted);font-size:10px;font-weight:700}.search-box{display:flex;align-items:center;min-width:0;height:40px;padding:0 10px 0 13px;color:var(--muted);border:1px solid var(--border);border-radius:7px;background:var(--surface-soft);transition:border-color .16s ease,box-shadow .16s ease,background .16s ease}.search-box:focus-within{color:var(--text-soft);border-color:var(--border-strong);background:var(--surface);box-shadow:0 0 0 3px color-mix(in srgb,var(--focus) 12%,transparent)}.search-box input{min-width:0;width:100%;height:100%;margin-left:9px;color:var(--text);border:0;outline:0;background:transparent;font-size:15px}.search-box input::placeholder{color:var(--faint)}.header-actions{display:flex;justify-content:flex-end;gap:6px}.icon-button,.reading-tools button,.mobile-back{display:inline-flex;align-items:center;justify-content:center;width:38px;height:38px;padding:0;border:0;border-radius:6px;background:transparent;cursor:pointer;transition:color .15s ease,background .15s ease}.icon-button:hover,.reading-tools button:hover,.mobile-back:hover{color:var(--accent);background:var(--surface-hover)}.icon-button.compact{flex:0 0 auto;width:29px;height:29px}.icon-button.count-button{width:auto;min-width:38px;padding:0 9px;gap:5px}.count-button span{min-width:11px;font-size:12px;font-weight:700}.count-button.is-active{color:var(--accent);background:var(--accent-soft)}.dimension-tabs{display:grid;grid-template-columns:repeat(5,minmax(74px,1fr));width:100%;height:66px;margin:0;padding:0}.dimension-tabs button{position:relative;display:grid;grid-template-columns:auto auto;justify-content:center;align-items:center;align-content:center;column-gap:7px;height:66px;padding:0 12px;color:var(--muted);border:0;background:transparent;cursor:pointer;transition:color .16s ease,background .16s ease}.dimension-tabs button:after{position:absolute;right:15px;bottom:-1px;left:15px;height:3px;background:var(--dimension-color);content:"";opacity:0;transform:scaleX(.45);transition:opacity .16s ease,transform .16s ease}.dimension-tabs button:hover{color:var(--text-soft);background:color-mix(in srgb,var(--dimension-soft) 45%,transparent)}.dimension-tabs button.is-active{color:var(--dimension-color);background:color-mix(in srgb,var(--dimension-soft) 74%,transparent)}:root[data-theme=dark] .dimension-tabs button.is-active{color:color-mix(in srgb,var(--dimension-color) 42%,white);background:color-mix(in srgb,var(--dimension-color) 16%,transparent)}.dimension-tabs button.is-active:after{opacity:1;transform:scaleX(1)}.dimension-tabs button span{font-size:15px;font-weight:700}.dimension-tabs button small{display:none}.workspace{display:grid;grid-template-columns:260px 350px minmax(440px,1fr);min-height:0;max-width:1800px;width:100%;margin:0 auto;overflow:hidden}.workspace-panel,.panel-region{min-width:0;min-height:0;height:100%}.panel-region{background:var(--surface)}.navigator-wrap,.list-wrap{border-right:1px solid var(--border)}.navigator{display:flex;flex-direction:column;overflow:hidden;background:var(--surface-soft)}.navigator-intro{display:flex;align-items:center;gap:11px;min-height:82px;padding:16px 18px;border-bottom:1px solid var(--border)}.dimension-symbol{display:inline-flex;flex:0 0 auto;align-items:center;justify-content:center;width:42px;height:42px;border-radius:7px}.navigator-intro div{display:grid;min-width:0;gap:3px}.navigator-intro strong{font-size:17px}.navigator-intro span{color:var(--muted);font-size:13px}.section-label{display:flex;align-items:center;gap:7px;height:44px;padding:0 18px;color:var(--muted);font-size:13px;font-weight:700}.section-label span:nth-of-type(2){margin-left:auto;font-variant-numeric:tabular-nums}.category-list{min-height:0;padding:0 10px 24px;overflow-y:auto;scrollbar-width:thin;scrollbar-color:var(--border-strong) transparent}.category-group+.category-group{margin-top:3px}.category-button{display:grid;grid-template-columns:minmax(0,1fr) auto auto;align-items:center;gap:8px;width:100%;min-height:46px;padding:8px 9px 8px 11px;text-align:left;border:0;border-radius:6px;background:transparent;cursor:pointer}.category-button:hover{background:var(--surface-hover)}.category-button.is-active{color:var(--accent);background:var(--accent-soft)}.category-button span{overflow-wrap:anywhere;font-size:15px;font-weight:700}.category-button small,.subcategory-list small{color:var(--muted);font-size:12px;font-variant-numeric:tabular-nums}.category-chevron{color:var(--faint);transition:transform .16s ease}.category-button.is-active .category-chevron{transform:rotate(90deg)}.subcategory-list{display:grid;gap:2px;margin:3px 0 7px;padding-left:17px}.subcategory-list button{position:relative;display:grid;grid-template-columns:minmax(0,1fr) auto;align-items:center;gap:8px;width:100%;min-height:40px;padding:6px 9px 6px 18px;color:var(--text-soft);text-align:left;border:0;border-radius:5px;background:transparent;cursor:pointer}.subcategory-list button:before{position:absolute;left:4px;width:5px;height:5px;border:1px solid var(--faint);border-radius:50%;content:""}.subcategory-list button:hover{color:var(--text);background:var(--surface-hover)}.subcategory-list button.is-active{color:var(--accent);font-weight:700}.subcategory-list button.is-active:before{border-color:var(--accent);background:var(--accent)}.subcategory-list span{overflow-wrap:anywhere;font-size:14px}.knowledge-list{display:grid;grid-template-rows:auto auto minmax(0,1fr);overflow:hidden}.list-search-area{padding:12px 13px;border-bottom:1px solid var(--border);background:var(--surface)}.list-search{width:100%}.list-header{display:flex;align-items:center;justify-content:space-between;min-height:82px;padding:14px 17px 13px 19px;border-bottom:1px solid var(--border)}.list-header div{min-width:0}.list-header span{display:block;margin-bottom:4px;color:var(--muted);font-size:12px;font-weight:700}.list-header h2{overflow:hidden;margin:0;font-size:17px;line-height:1.4;white-space:nowrap;text-overflow:ellipsis}.list-header>strong{display:inline-flex;flex:0 0 auto;align-items:center;justify-content:center;min-width:34px;height:26px;margin-left:12px;padding:0 7px;color:var(--text-soft);border:1px solid var(--border);border-radius:5px;background:var(--surface-soft);font-size:13px;font-variant-numeric:tabular-nums}.item-scroll{min-height:0;padding:7px 7px 28px;overflow-y:auto;scrollbar-width:thin;scrollbar-color:var(--border-strong) transparent}.knowledge-item{position:relative;display:grid;grid-template-columns:28px minmax(0,1fr) auto;align-items:start;gap:8px;width:100%;min-height:60px;padding:10px 10px 10px 8px;text-align:left;border:1px solid transparent;border-radius:6px;background:transparent;cursor:pointer;transition:border-color .14s ease,background .14s ease}.knowledge-item+.knowledge-item{margin-top:2px}.knowledge-item:hover{background:var(--surface-hover)}.knowledge-item.is-active{border-color:color-mix(in srgb,var(--item-color) 24%,var(--border));background:color-mix(in srgb,var(--item-color) 8%,var(--surface))}.knowledge-item.is-active:before{position:absolute;top:9px;bottom:9px;left:-1px;width:3px;border-radius:0 3px 3px 0;background:var(--item-color);content:""}.item-index{padding-top:1px;color:var(--faint);font-size:11px;font-variant-numeric:tabular-nums}.item-copy{display:grid;min-width:0;gap:4px}.item-copy strong{color:var(--text-soft);font-size:15px;font-weight:600;line-height:1.55;overflow-wrap:anywhere}.knowledge-item.is-active .item-copy strong{color:var(--text);font-weight:700}.item-copy small{overflow:hidden;color:var(--muted);font-size:12px;line-height:1.4;white-space:nowrap;text-overflow:ellipsis}.item-status{display:flex;gap:4px;padding-top:2px;color:var(--accent)}.empty-list{display:flex;flex-direction:column;align-items:center;justify-content:center;min-height:260px;padding:30px;color:var(--muted);text-align:center}.empty-list strong{margin-top:13px;color:var(--text-soft);font-size:16px}.empty-list span{margin-top:5px;font-size:13px}.reader{position:relative;display:block;overflow:hidden}.reader-header{position:relative;z-index:2;padding:14px clamp(22px,3.2vw,52px) 13px;border-bottom:1px solid var(--border);background:var(--surface)}.reader-breadcrumbs{display:flex;align-items:center;gap:7px;min-height:20px;color:var(--muted);font-size:12px}.reader-breadcrumbs i{color:var(--faint);font-style:normal}.reader-breadcrumbs strong{color:var(--text-soft)}.mobile-back{display:none}.reader-title-row{display:grid;grid-template-columns:minmax(0,1fr) auto;align-items:start;gap:18px;margin-top:12px}.reader-title-row>div{min-width:0}.reader-kicker{display:block;margin-bottom:5px;color:var(--reader-accent);font-size:11px;font-weight:800}.reader-title-row h1{margin:0;font-family:Songti SC,"Noto Serif CJK SC",serif;font-size:clamp(24px,2vw,32px);font-weight:700;line-height:1.25;overflow-wrap:anywhere}.reader-title-row p{margin:7px 0 0;color:var(--muted);font-size:12px}.favorite-button{display:inline-flex;align-items:center;justify-content:center;width:42px;height:42px;margin-top:6px;color:var(--muted);border:1px solid var(--border);border-radius:6px;background:var(--surface-soft);cursor:pointer}.favorite-button:hover,.favorite-button.is-active{color:var(--reader-accent);border-color:color-mix(in srgb,var(--reader-accent) 40%,var(--border));background:color-mix(in srgb,var(--reader-accent) 9%,var(--surface))}.reader-controls{display:flex;align-items:center;justify-content:space-between;gap:20px;margin-top:16px}.mode-switch{display:inline-grid;grid-template-columns:repeat(3,minmax(105px,1fr));gap:3px;padding:3px;border:1px solid var(--border);border-radius:7px;background:var(--surface-soft)}.mode-switch button{display:inline-flex;align-items:center;justify-content:center;gap:6px;height:36px;padding:0 13px;color:var(--muted);border:0;border-radius:5px;background:transparent;font-size:13px;font-weight:700;cursor:pointer;white-space:nowrap}.mode-switch button:hover{color:var(--text-soft)}.mode-switch button.is-active{color:var(--reader-accent);background:var(--surface);box-shadow:0 1px 4px #17251d1a}.mode-switch .quiz-launch-button{color:var(--text-soft)}.quiz-launch-button>span{min-width:26px;padding:2px 5px;color:var(--reader-accent);border-radius:4px;background:color-mix(in srgb,var(--reader-accent) 11%,var(--surface));font-size:10px;font-variant-numeric:tabular-nums}.reading-tools{display:flex;flex:0 0 auto;align-items:center;height:38px;color:var(--muted);border:1px solid var(--border);border-radius:6px;background:var(--surface-soft)}.reading-tools button{width:35px;height:35px;border-radius:4px}.reading-tools>span{width:26px;text-align:center;font-size:12px;font-variant-numeric:tabular-nums}.reading-tools>i{width:1px;height:17px;margin:0 3px;background:var(--border)}.reader-scroll{height:100%;min-height:0;overflow-y:auto;scroll-behavior:smooth;scrollbar-width:thin;scrollbar-color:var(--border-strong) transparent}.reader-content{min-height:100%;padding:34px clamp(24px,5.6vw,88px) 72px}.reader.is-immersive{position:fixed;z-index:100;top:0;right:0;bottom:0;left:0;width:100vw;height:100dvh;background:var(--surface)}.reader.is-immersive .reader-content{padding-top:clamp(26px,4vh,48px)}.focus-exit-button{position:fixed;z-index:102;top:16px;right:18px;display:inline-flex;align-items:center;justify-content:center;width:44px;height:44px;padding:0;color:var(--text-soft);border:1px solid var(--border);border-radius:6px;background:color-mix(in srgb,var(--surface) 92%,transparent);box-shadow:var(--shadow);-webkit-backdrop-filter:blur(10px);backdrop-filter:blur(10px);cursor:pointer}.focus-exit-button:hover{color:var(--reader-accent);border-color:color-mix(in srgb,var(--reader-accent) 36%,var(--border))}.markdown-body{max-width:800px;margin:0 auto;color:var(--text-soft);font-family:Songti SC,"Noto Serif CJK SC",serif;line-height:1.95;overflow-wrap:anywhere}.markdown-body>:first-child{margin-top:0}.markdown-body>:last-child{margin-bottom:0}.markdown-body h1,.markdown-body h2,.markdown-body h3,.markdown-body h4{color:var(--text);line-height:1.45}.markdown-body h1{margin:1.8em 0 .7em;font-size:1.65em}.markdown-body h2{position:relative;margin:2em 0 .7em;padding-left:13px;font-size:1.28em}.markdown-body h2:before{position:absolute;top:.27em;bottom:.27em;left:0;width:3px;border-radius:2px;background:var(--reader-accent);content:""}.markdown-body h3{margin:1.7em 0 .55em;font-size:1.1em}.markdown-body p,.markdown-body ul,.markdown-body ol,.markdown-body blockquote,.markdown-body pre,.markdown-body table{margin:.9em 0}.markdown-body strong{color:var(--text);font-weight:750}.markdown-body ul,.markdown-body ol{padding-left:1.5em}.markdown-body li{margin:.38em 0;padding-left:.2em}.markdown-body li::marker{color:var(--reader-accent)}.markdown-body blockquote{padding:.7em 1em;color:var(--text-soft);border-left:3px solid var(--reader-accent);background:color-mix(in srgb,var(--reader-accent) 7%,var(--surface))}.markdown-body code{padding:.12em .35em;border:1px solid var(--border);border-radius:4px;background:var(--surface-soft);font-family:SFMono-Regular,Consolas,monospace;font-size:.86em}.markdown-body pre{padding:16px;overflow-x:auto;border:1px solid var(--border);border-radius:6px;background:var(--surface-soft)}.markdown-body pre code{padding:0;border:0;background:transparent}.markdown-body table{display:block;width:100%;overflow-x:auto;border-collapse:collapse}.markdown-body th,.markdown-body td{padding:8px 11px;border:1px solid var(--border);text-align:left}.markdown-body th{color:var(--text);background:var(--surface-soft)}.markdown-body hr{margin:2em 0;border:0;border-top:1px solid var(--border)}.markdown-body .katex{color:var(--text);font-size:1em}.markdown-body .katex-display{margin:1.2em 0;padding:.6em 0;overflow-x:auto;overflow-y:hidden}.reader-loading,.reader-error{display:flex;flex-direction:column;align-items:center;max-width:800px;min-height:360px;margin:0 auto;padding-top:62px;color:var(--muted);text-align:center}.loading-mark{display:inline-flex;align-items:center;justify-content:center;width:43px;height:43px;margin-bottom:16px;color:var(--reader-accent);border:1px solid color-mix(in srgb,var(--reader-accent) 28%,var(--border));border-radius:7px;background:color-mix(in srgb,var(--reader-accent) 8%,var(--surface));animation:pulse-mark 1.6s ease-in-out infinite}.reader-loading strong,.reader-error strong{color:var(--text);font-size:14px}.reader-loading>span:last-of-type,.reader-error span{margin-top:7px;font-size:11px}.loading-lines{display:grid;gap:11px;width:100%;margin-top:38px}.loading-lines i{height:10px;border-radius:3px;background:var(--surface-hover);animation:pulse-line 1.5s ease-in-out infinite}.loading-lines i:nth-child(2){width:92%;animation-delay:.1s}.loading-lines i:nth-child(3){width:96%;animation-delay:.2s}.loading-lines i:nth-child(4){width:68%;animation-delay:.3s}.reader-error button{display:inline-flex;align-items:center;gap:7px;height:36px;margin-top:22px;padding:0 14px;color:#fff;border:0;border-radius:6px;background:var(--reader-accent);font-size:12px;font-weight:700;cursor:pointer}.article-nav{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:12px;max-width:800px;margin:58px auto 0;padding-top:22px;border-top:1px solid var(--border)}.article-nav button{display:grid;grid-template-columns:auto minmax(0,1fr);align-items:center;gap:10px;min-height:68px;padding:11px 13px;text-align:left;border:1px solid var(--border);border-radius:7px;background:var(--surface-soft);cursor:pointer}.article-nav button:last-child{grid-template-columns:minmax(0,1fr) auto;text-align:right}.article-nav button:hover:not(:disabled){color:var(--reader-accent);border-color:color-mix(in srgb,var(--reader-accent) 38%,var(--border));background:color-mix(in srgb,var(--reader-accent) 6%,var(--surface))}.article-nav span{display:grid;min-width:0;gap:4px}.article-nav small{color:var(--muted);font-size:11px}.article-nav strong{overflow:hidden;font-size:13px;white-space:nowrap;text-overflow:ellipsis}.knowledge-chat{position:absolute;z-index:8;right:24px;bottom:24px;display:flex;flex-direction:column;align-items:flex-end;gap:10px;pointer-events:none}.chat-launcher,.chat-header-actions button,.chat-composer>button{display:inline-flex;align-items:center;justify-content:center;border:0;cursor:pointer}.chat-launcher{gap:8px;min-width:120px;height:46px;padding:0 18px;color:#fff;border:1px solid color-mix(in srgb,var(--chat-accent) 70%,#123c2a);border-radius:22px;background:var(--chat-accent);box-shadow:0 8px 24px color-mix(in srgb,var(--chat-accent) 30%,transparent);font-size:14px;font-weight:750;pointer-events:auto;transition:transform .15s ease,box-shadow .15s ease,filter .15s ease}.chat-launcher:hover{filter:brightness(1.06);box-shadow:0 10px 28px color-mix(in srgb,var(--chat-accent) 38%,transparent);transform:translateY(-1px)}.chat-panel{display:grid;grid-template-rows:auto auto minmax(0,1fr) auto auto;width:min(430px,calc(100vw - 48px));height:min(640px,calc(100dvh - 162px));min-height:min(360px,calc(100dvh - 162px));overflow:hidden;border:1px solid var(--border-strong);border-radius:10px;background:var(--surface);box-shadow:0 16px 44px #1120182e;pointer-events:auto;animation:chat-panel-in .16s ease-out}.chat-panel.is-maximized{position:fixed;z-index:220;top:16px;right:16px;bottom:16px;left:16px;width:auto;height:auto;min-height:0;animation:none}.chat-header{display:flex;align-items:center;justify-content:space-between;gap:14px;min-height:66px;padding:11px 13px 11px 16px;border-bottom:1px solid var(--border);background:color-mix(in srgb,var(--chat-accent) 5%,var(--surface))}.chat-heading,.chat-heading>div{display:flex;align-items:center;min-width:0}.chat-heading{gap:10px}.chat-heading>div{flex-direction:column;align-items:flex-start;gap:2px}.chat-heading strong{font-size:16px}.chat-heading span:not(.chat-mark){color:var(--muted);font-size:11px}.chat-mark{display:inline-flex;align-items:center;justify-content:center;width:34px;height:34px;color:var(--chat-accent);border:1px solid color-mix(in srgb,var(--chat-accent) 28%,var(--border));border-radius:7px;background:color-mix(in srgb,var(--chat-accent) 10%,var(--surface))}.chat-header-actions{display:flex;flex:0 0 auto;gap:2px}.chat-font-controls{display:flex;align-items:center;height:31px;margin-right:2px;border:1px solid var(--border);border-radius:5px;background:var(--surface)}.chat-header-actions .chat-font-controls button{width:27px;height:29px;border-radius:4px}.chat-font-controls span{min-width:22px;color:var(--text-soft);font-size:11px;font-variant-numeric:tabular-nums;text-align:center}.chat-header-actions button{width:31px;height:31px;color:var(--muted);border-radius:5px;background:transparent}.chat-header-actions button:hover{color:var(--chat-accent);background:var(--surface-hover)}.chat-context{display:flex;align-items:center;gap:7px;min-width:0;min-height:38px;padding:8px 16px;color:var(--chat-accent);border-bottom:1px solid var(--border);background:var(--surface-soft);font-size:12px}.chat-context span{min-width:0;flex:1 1 auto;overflow:hidden;color:var(--text-soft);white-space:nowrap;text-overflow:ellipsis}.chat-context select{flex:0 0 auto;width:205px;height:27px;padding:0 6px;color:var(--text-soft);border:1px solid var(--border);border-radius:5px;outline:0;background:var(--surface);font:inherit;cursor:pointer}.chat-context select:focus-visible{border-color:var(--chat-accent);outline:2px solid color-mix(in srgb,var(--chat-accent) 18%,transparent);outline-offset:1px}.chat-context select:disabled{cursor:wait;opacity:.65}.chat-messages{min-height:0;padding:17px 15px 14px;overflow-y:scroll;overscroll-behavior:contain;scrollbar-gutter:stable;scrollbar-width:thin;scrollbar-color:var(--border-strong) transparent}.chat-messages::-webkit-scrollbar{width:8px}.chat-messages::-webkit-scrollbar-track{background:transparent}.chat-messages::-webkit-scrollbar-thumb{border:2px solid transparent;border-radius:4px;background:var(--border-strong);background-clip:padding-box}.chat-message{display:flex;margin-bottom:14px}.chat-message:last-child{margin-bottom:0}.chat-message.user{justify-content:flex-end}.chat-message-bubble{max-width:90%;padding:11px 13px;color:var(--text-soft);border:1px solid var(--border);border-radius:9px 9px 9px 3px;background:var(--surface-soft);font-size:var(--chat-font-size, 15px);line-height:1.7;overflow-wrap:anywhere}.chat-panel.is-maximized .chat-messages,.chat-panel.is-maximized .chat-composer{padding-right:max(24px,calc((100vw - 920px)/2));padding-left:max(24px,calc((100vw - 920px)/2))}.chat-panel.is-maximized .chat-message-bubble{max-width:min(860px,90%)}.chat-message.user .chat-message-bubble{color:#fff;border-color:color-mix(in srgb,var(--chat-accent) 82%,#123c2a);border-radius:9px 9px 3px;background:var(--chat-accent)}.chat-message-bubble p{margin:0}.chat-message-bubble>:first-child{margin-top:0}.chat-message-bubble>:last-child{margin-bottom:0}.chat-message-bubble p,.chat-message-bubble ul,.chat-message-bubble ol,.chat-message-bubble blockquote,.chat-message-bubble pre{margin:.45em 0}.chat-message-bubble ul,.chat-message-bubble ol{padding-left:1.25em}.chat-message-bubble code{padding:.08em .25em;border-radius:3px;background:color-mix(in srgb,var(--chat-accent) 10%,var(--surface));font-size:.9em}.chat-message-bubble pre{padding:8px;overflow-x:auto;border-radius:5px;background:color-mix(in srgb,var(--chat-accent) 7%,var(--surface))}.chat-message-bubble pre code{padding:0;background:transparent}.chat-thinking{display:flex;gap:4px;align-items:center;min-height:38px}.chat-thinking i{width:5px;height:5px;border-radius:50%;background:var(--chat-accent);animation:chat-thinking 1.1s ease-in-out infinite}.chat-thinking i:nth-child(2){animation-delay:.12s}.chat-thinking i:nth-child(3){animation-delay:.24s}.chat-thinking span{margin-left:3px;color:var(--muted);font-size:12px}.chat-error{margin:0 13px 8px;padding:7px 9px;color:#a54242;border:1px solid color-mix(in srgb,#b64a4a 30%,var(--border));border-radius:5px;background:color-mix(in srgb,#b64a4a 7%,var(--surface));font-size:12px;line-height:1.45}.chat-composer{display:grid;grid-template-columns:minmax(0,1fr) 40px;align-items:end;gap:8px;padding:11px 12px 12px;border-top:1px solid var(--border);background:var(--surface)}.chat-composer textarea{width:100%;min-height:42px;max-height:110px;padding:9px 10px;resize:vertical;color:var(--text);border:1px solid var(--border);border-radius:6px;outline:0;background:var(--surface-soft);font-size:14px;line-height:1.45}.chat-composer textarea:focus{border-color:color-mix(in srgb,var(--chat-accent) 50%,var(--border));box-shadow:0 0 0 3px color-mix(in srgb,var(--chat-accent) 12%,transparent)}.chat-composer textarea::placeholder{color:var(--faint)}.chat-composer>button{width:40px;height:40px;color:#fff;border-radius:6px;background:var(--chat-accent)}.chat-composer>button:hover:not(:disabled){filter:brightness(1.06)}@keyframes chat-panel-in{0%{opacity:0;transform:translateY(8px) scale(.98)}to{opacity:1;transform:translateY(0) scale(1)}}@keyframes chat-thinking{0%,60%,to{opacity:.35;transform:translateY(0)}30%{opacity:1;transform:translateY(-3px)}}body.quiz-open{overflow:hidden}.quiz-overlay{position:fixed;z-index:300;top:0;right:0;bottom:0;left:0;display:grid;place-items:center;padding:24px;background:#0a120d94;-webkit-backdrop-filter:blur(4px);backdrop-filter:blur(4px)}.quiz-dialog{display:grid;grid-template-rows:auto minmax(0,1fr);width:min(900px,calc(100vw - 48px));height:min(820px,calc(100dvh - 48px));overflow:hidden;border:1px solid var(--border-strong);border-radius:8px;background:var(--surface);box-shadow:0 24px 80px #08120c47}.quiz-header{display:grid;grid-template-columns:42px minmax(0,1fr) auto;align-items:center;gap:12px;min-height:70px;padding:10px 17px;border-bottom:1px solid var(--border);background:var(--surface)}.quiz-icon-button{display:inline-flex;align-items:center;justify-content:center;width:40px;height:40px;padding:0;color:var(--muted);border:0;border-radius:5px;background:transparent;cursor:pointer}.quiz-icon-button:hover{color:var(--text);background:var(--surface-hover)}.quiz-heading{display:grid;min-width:0;gap:4px}.quiz-heading strong{overflow:hidden;font-size:16px;white-space:nowrap;text-overflow:ellipsis}.quiz-heading span{color:var(--muted);font-size:11px}.quiz-header-score{display:flex;align-items:center;gap:13px}.quiz-stars{display:inline-flex;align-items:center;gap:3px;color:#d99708}.quiz-correct-count{display:inline-flex;align-items:center;justify-content:center;gap:5px;min-width:43px;height:30px;padding:0 8px;color:var(--quiz-accent);border-radius:5px;background:color-mix(in srgb,var(--quiz-accent) 10%,var(--surface));font-size:12px;font-weight:800}.quiz-main{min-height:0;overflow:hidden}.quiz-center-state{display:flex;flex-direction:column;align-items:center;justify-content:center;height:100%;min-height:300px;padding:32px;color:var(--muted);text-align:center}.quiz-center-state>svg{margin-bottom:16px;color:var(--quiz-accent)}.quiz-center-state>strong{color:var(--text);font-size:18px}.quiz-center-state>span:not(.quiz-result-mark,.quiz-stars){max-width:480px;margin-top:8px;font-size:13px;line-height:1.6}.quiz-spinner{animation:quiz-spin .9s linear infinite}.quiz-question-layout{display:grid;grid-template-rows:auto minmax(0,1fr) auto;height:100%}.quiz-progress-block{padding:13px 24px 11px;border-bottom:1px solid var(--border);background:var(--surface-soft)}.quiz-group-tabs{display:flex;justify-content:center;gap:5px}.quiz-group-tabs button{display:inline-flex;align-items:center;justify-content:center;gap:5px;min-width:100px;height:31px;padding:0 11px;color:var(--muted);border:1px solid transparent;border-radius:5px;background:transparent;font-size:12px;font-weight:700;cursor:pointer}.quiz-group-tabs button.is-active{color:var(--quiz-accent);border-color:color-mix(in srgb,var(--quiz-accent) 28%,var(--border));background:var(--surface)}.quiz-group-tabs button svg{color:#d99708}.quiz-progress-row{display:grid;grid-template-columns:minmax(0,1fr) 42px;align-items:center;gap:12px;max-width:650px;margin:10px auto 0}.quiz-progress-row>span{color:var(--muted);font-size:11px;text-align:right;font-variant-numeric:tabular-nums}.quiz-progress-track{height:5px;overflow:hidden;border-radius:3px;background:var(--border)}.quiz-progress-track i{display:block;height:100%;border-radius:inherit;background:var(--quiz-accent);transition:width .18s ease}.quiz-question-scroll{width:100%;max-width:780px;min-height:0;margin:0 auto;padding:28px 44px 32px;overflow-y:auto;scrollbar-width:thin;scrollbar-color:var(--border-strong) transparent}.quiz-question-number{margin-bottom:9px;color:var(--quiz-accent);font-size:11px;font-weight:800;text-transform:uppercase}.quiz-markdown{min-width:0;overflow-wrap:anywhere}.quiz-markdown>:first-child{margin-top:0}.quiz-markdown>:last-child{margin-bottom:0}.quiz-markdown p{margin:.45em 0}.quiz-markdown .katex-display{margin:.7em 0;overflow-x:auto;overflow-y:hidden}.quiz-question-text{color:var(--text);font-family:Songti SC,"Noto Serif CJK SC",serif;font-size:19px;font-weight:650;line-height:1.65}.quiz-options{display:grid;gap:10px;margin-top:24px}.quiz-option{display:grid;grid-template-columns:34px minmax(0,1fr) 22px;align-items:center;gap:12px;width:100%;min-height:58px;padding:10px 13px;color:var(--text-soft);text-align:left;border:1px solid var(--border);border-radius:7px;background:var(--surface);cursor:pointer;transition:border-color .14s ease,background .14s ease,color .14s ease}.quiz-option:hover:not(:disabled){border-color:var(--border-strong);background:var(--surface-soft)}.quiz-option.is-selected{color:var(--quiz-accent);border-color:var(--quiz-accent);background:color-mix(in srgb,var(--quiz-accent) 7%,var(--surface))}.quiz-option.is-correct{color:#fff;border-color:#287a4a;background:#287a4a;opacity:1}.quiz-option.is-wrong{color:#fff;border-color:#b7473c;background:#b7473c;opacity:1}.quiz-option-letter{display:inline-flex;align-items:center;justify-content:center;width:32px;height:32px;border-radius:50%;background:var(--surface-hover);font-size:12px;font-weight:800}.quiz-option.is-selected .quiz-option-letter{background:color-mix(in srgb,var(--quiz-accent) 15%,var(--surface))}.quiz-option.is-correct .quiz-option-letter,.quiz-option.is-wrong .quiz-option-letter{background:#ffffff2e}.quiz-option-state{justify-self:end}.quiz-explanation{margin-top:18px;padding:15px 17px;color:var(--text-soft);border-left:3px solid var(--quiz-accent);background:color-mix(in srgb,var(--quiz-accent) 7%,var(--surface-soft));font-size:14px;line-height:1.7}.quiz-explanation>strong{display:flex;align-items:center;gap:7px;margin-bottom:6px;color:var(--quiz-accent);font-size:13px}.quiz-footer{display:flex;justify-content:flex-end;min-height:68px;padding:12px 24px;border-top:1px solid var(--border);background:var(--surface)}.quiz-primary-button,.quiz-secondary-button{display:inline-flex;align-items:center;justify-content:center;gap:7px;min-width:142px;height:43px;padding:0 18px;border-radius:6px;font-size:13px;font-weight:800;cursor:pointer}.quiz-primary-button{color:#fff;border:1px solid var(--quiz-accent);background:var(--quiz-accent)}.quiz-primary-button.is-compact{min-width:auto;height:38px;margin-top:20px}.quiz-secondary-button{color:var(--quiz-accent);border:1px solid color-mix(in srgb,var(--quiz-accent) 44%,var(--border));background:color-mix(in srgb,var(--quiz-accent) 6%,var(--surface))}.quiz-complete-state .quiz-stars{margin-top:14px}.quiz-result-mark{display:inline-flex;align-items:center;justify-content:center;width:82px;height:82px;margin-bottom:19px;color:#fff;border-radius:50%}.quiz-result-mark.is-pass{background:#d99708}.quiz-result-mark.is-fail{background:#b7473c}.quiz-result-score{margin-top:16px;color:var(--quiz-accent);font-size:34px;font-variant-numeric:tabular-nums}.quiz-result-actions{display:flex;gap:10px;margin-top:24px}@keyframes quiz-spin{to{transform:rotate(360deg)}}.mobile-nav{display:none}@keyframes pulse-mark{0%,to{opacity:.65;transform:scale(.96)}50%{opacity:1;transform:scale(1)}}@keyframes pulse-line{0%,to{opacity:.45}50%{opacity:.9}}@media(max-width:1180px){.topbar{grid-template-columns:215px minmax(390px,1fr) auto}.dimension-tabs button{padding-inline:12px}.dimension-tabs button small{display:none}.workspace{grid-template-columns:230px 305px minmax(410px,1fr)}.reader-header{padding-inline:28px}.reader-content{padding-inline:34px}}@media(min-width:901px)and (max-width:1160px){.reader-controls{align-items:stretch;flex-direction:column;gap:9px}.mode-switch{grid-template-columns:repeat(3,minmax(0,1fr));width:100%}.reading-tools{align-self:flex-end}}@media(max-width:900px){body{overflow:hidden}.app-shell{grid-template-rows:auto minmax(0,1fr) 58px;min-height:520px}.topbar{grid-template-columns:minmax(0,1fr) auto;gap:6px 8px;height:auto;padding:8px 10px 0}.brand-logo{width:36px;height:36px}.brand strong{font-size:16px}.brand span{font-size:9px}.dimension-tabs{grid-column:1 / -1;grid-row:2;display:flex;height:49px;width:calc(100% + 20px);margin-left:-10px;padding:0 7px;overflow-x:auto;scrollbar-width:none}.dimension-tabs::-webkit-scrollbar{display:none}.dimension-tabs button{flex:1 0 74px;grid-template-columns:auto auto;justify-content:center;height:49px;padding:0 9px}.dimension-tabs button span{font-size:14px}.list-search-area{padding:10px 12px}.list-search{height:40px}.workspace{display:block;min-height:0;overflow:hidden}.workspace-panel{display:none;height:100%}.workspace-panel.mobile-active{display:block}.reader.is-immersive:after{position:fixed;z-index:101;top:0;right:0;left:0;height:56px;border-bottom:1px solid var(--border);background:var(--surface);content:""}.reader.is-immersive .reader-scroll{height:calc(100% - 56px);margin-top:56px}.reader.is-immersive .focus-exit-button{top:6px;right:10px;box-shadow:none}.navigator-wrap,.list-wrap{border-right:0}.navigator-intro,.list-header{min-height:70px}.category-list,.item-scroll{padding-bottom:24px}.reader-header{padding:10px 15px 11px}.mobile-back{display:inline-flex;flex:0 0 auto;width:30px;height:30px;margin-left:-7px}.reader-breadcrumbs{gap:5px}.reader-title-row{margin-top:7px}.reader-title-row h1{font-size:23px}.favorite-button{width:38px;height:38px}.reader-controls{gap:9px;margin-top:12px}.mode-switch{grid-template-columns:repeat(3,minmax(90px,1fr))}.mode-switch button{padding-inline:8px}.reader-content{padding:26px clamp(17px,5vw,42px) 58px}.knowledge-chat{right:13px;bottom:13px}.chat-panel{width:min(430px,calc(100vw - 26px));height:min(640px,calc(100dvh - 230px));min-height:min(360px,calc(100dvh - 230px))}.mobile-nav{display:grid;grid-template-columns:repeat(3,1fr);align-items:stretch;border-top:1px solid var(--border);background:var(--surface)}.mobile-nav button{display:flex;align-items:center;justify-content:center;gap:6px;color:var(--muted);border:0;background:transparent;font-size:13px;font-weight:700;cursor:pointer}.mobile-nav button.is-active{color:var(--accent);background:var(--accent-soft)}}@media(max-width:540px){.header-actions{gap:1px}.icon-button{width:35px;height:35px}.count-button span{display:none}.dimension-tabs button{flex-basis:68px;gap:5px}.reader-breadcrumbs i,.reader-breadcrumbs span:nth-of-type(2){display:none}.reader-title-row h1{font-size:21px}.reader-title-row p{margin-top:5px}.reader-controls{align-items:stretch;flex-direction:column}.mode-switch{grid-template-columns:repeat(3,minmax(0,1fr));width:100%}.mode-switch button{min-width:0;gap:4px;padding-inline:5px;font-size:12px}.quiz-launch-button>span{min-width:23px;padding-inline:3px}.reading-tools{align-self:flex-end}.reader-content{padding-top:22px}.knowledge-chat{right:10px;bottom:10px}.chat-launcher{min-width:0;height:44px;padding-inline:14px}.chat-header{gap:8px;padding-right:9px;padding-left:10px}.chat-heading{gap:7px}.chat-heading span:not(.chat-mark){display:none}.chat-mark{width:30px;height:30px}.chat-header-actions button{width:29px;height:29px}.chat-font-controls{height:29px}.chat-header-actions .chat-font-controls button{width:24px;height:27px}.chat-font-controls span{min-width:18px}.chat-context select{width:174px;font-size:11px}.chat-panel{width:calc(100vw - 20px);height:min(640px,calc(100dvh - 220px));min-height:min(340px,calc(100dvh - 220px))}.chat-panel.is-maximized{top:0;right:0;bottom:0;left:0;width:auto;height:auto;min-height:0;border:0;border-radius:0}.chat-panel.is-maximized .chat-messages,.chat-panel.is-maximized .chat-composer{padding-right:12px;padding-left:12px}.article-nav{grid-template-columns:1fr;margin-top:42px}.quiz-overlay{place-items:stretch;padding:0;background:var(--surface);-webkit-backdrop-filter:none;backdrop-filter:none}.quiz-dialog{width:100%;height:100dvh;border:0;border-radius:0;box-shadow:none}.quiz-header{grid-template-columns:40px minmax(0,1fr) auto;gap:8px;min-height:65px;padding:8px 10px}.quiz-heading strong{font-size:14px}.quiz-heading span{overflow:hidden;font-size:10px;white-space:nowrap;text-overflow:ellipsis}.quiz-header-score>.quiz-stars{display:none}.quiz-progress-block{padding:10px 12px 9px}.quiz-group-tabs{width:100%}.quiz-group-tabs button{flex:1;min-width:0;padding-inline:5px;font-size:11px}.quiz-progress-row{margin-top:8px}.quiz-question-scroll{padding:20px 14px 26px}.quiz-question-text{font-size:17px}.quiz-options{margin-top:18px}.quiz-option{grid-template-columns:32px minmax(0,1fr) 20px;gap:9px;min-height:56px;padding:9px 10px;font-size:13px}.quiz-option-letter{width:30px;height:30px}.quiz-footer{min-height:64px;padding:10px 12px}.quiz-footer .quiz-primary-button{width:100%}.quiz-center-state{min-height:0;padding:24px 18px;overflow-y:auto}.quiz-result-actions{flex-direction:column;width:min(100%,300px)}.quiz-result-actions button{width:100%}}@media(max-width:380px){.quiz-launch-button>svg{display:none}}@media(prefers-reduced-motion:reduce){*,*:before,*:after{scroll-behavior:auto!important;animation-duration:.01ms!important;animation-iteration-count:1!important;transition-duration:.01ms!important}}