@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{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:"0.16.45"}.katex .katex-mathml{clip:rect(1px,1px,1px,1px);border:0;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}*{margin:0;padding:0;box-sizing:border-box;-webkit-tap-highlight-color:transparent;outline:none}div{-webkit-user-select:none;-moz-user-select:none;-ms-user-select:none;user-select:none}input,textarea,[contenteditable=true],.message-bubble,.message-bubble *,.ant-popover-inner,.ant-popover-inner *,.learning-panel,.learning-panel *,.exam-paper-content,.exam-paper-content *,.grading-panel,.grading-panel *{-webkit-user-select:text!important;-moz-user-select:text!important;-ms-user-select:text!important;user-select:text!important}html,body,#root{height:100vh;height:100dvh;overflow:hidden;font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,Helvetica Neue,sans-serif}.login-overlay{position:fixed;top:0;left:0;width:100vw;height:100vh;height:100dvh;display:flex;flex-direction:column;backdrop-filter:blur(4px);-webkit-backdrop-filter:blur(4px);z-index:2000;background-color:#ffffff1a}.user-corner{position:absolute;top:12px;right:24px;z-index:10;display:flex;align-items:center;gap:8px}.sidebar-toggle-btn{position:absolute;top:12px;left:20px;z-index:10}.user-avatar-wrap{display:flex;align-items:center;gap:8px}.user-avatar{width:36px;height:36px;border-radius:50%;object-fit:cover;border:2px solid #e8e8e8}.user-avatar-default{display:flex;align-items:center;justify-content:center;background:linear-gradient(135deg,#e6fffb,#b5f5ec);color:#00b96b;font-size:16px}.user-name{font-size:14px;color:#555;font-weight:500}.login-btn{font-size:14px}.toolbar-avatar{width:28px;height:28px;border-radius:50%;object-fit:cover;border:1.5px solid #e8e8e8;flex-shrink:0}.toolbar-avatar-default{display:flex;align-items:center;justify-content:center;background:linear-gradient(135deg,#e6fffb,#b5f5ec);color:#00b96b;font-size:14px}.avatar-menu-user{padding:4px 0}.avatar-menu-name{font-weight:600;font-size:14px;color:#333}.record-type-badge{display:inline-flex;align-items:center;gap:3px;font-size:10px;line-height:16px;padding:0 4px;border-radius:4px;border:1px solid transparent}.record-type-badge-favorite{background:#fff7e6;border-color:#ffd591;color:#fa8c16}.record-type-badge-followed{background:#f0f5ff;border-color:#adc6ff;color:#2f54eb}.app-layout{height:100vh;height:100dvh;background:#f0f2f5}.history-sider{border-right:1px solid #eee;overflow-y:auto;transition:width .25s ease;position:relative}.history-sider.history-sider-resizing{transition:none}.history-sider-resize-handle{width:4px;cursor:col-resize;background:transparent;position:absolute;top:0;right:0;height:100%;z-index:30;transition:background .2s}.history-sider-resize-handle:after{content:none}.history-sider-resize-handle:hover,.history-sider-resize-handle.dragging{background:#00b96b}.history-sider .ant-layout-sider-children{display:flex;flex-direction:column}.main-content{display:flex;flex-direction:column;overflow:hidden;background:#f7f8fa;min-width:375px}.history-panel{height:100%;display:flex;flex-direction:column;background:#fff}.history-panel .panel-header{display:flex;align-items:center;justify-content:space-between;padding:12px 16px;font-weight:700;font-size:15px;color:#1a1a1a;letter-spacing:.5px;line-height:32px}.history-panel .panel-header>div:first-child{min-width:0;flex:1;flex-wrap:nowrap;overflow:hidden}.history-panel .panel-header>div:first-child>span{white-space:nowrap;overflow:hidden;text-overflow:ellipsis}.new-session-btn-wrap{padding:0 12px 12px}.new-session-btn-wrap .ant-btn{border-radius:8px;height:36px;border-color:#e0e0e0;color:#666}.new-session-btn-wrap .ant-btn:hover{border-color:#00b96b;color:#00b96b}.shortcut-keys{display:inline-flex;gap:3px;margin-left:auto}.shortcut-key{display:inline-flex;align-items:center;justify-content:center;min-width:20px;height:20px;padding:0 4px;font-size:11px;line-height:1;color:#aaa;background:#f5f5f5;border:1px solid #e0e0e0;border-radius:4px;font-family:inherit}.history-panel .session-list{flex:1;overflow-y:overlay;padding:0 8px 8px;scrollbar-width:thin;scrollbar-color:transparent transparent;transition:scrollbar-color .3s}.history-panel .session-list:hover{scrollbar-color:rgba(0,0,0,.15) transparent}.history-panel .session-list::-webkit-scrollbar{width:4px}.history-panel .session-list::-webkit-scrollbar-thumb{background:transparent;border-radius:4px;transition:background .3s}.history-panel .session-list:hover::-webkit-scrollbar-thumb{background:#00000026}.history-panel .session-list:active::-webkit-scrollbar-thumb{background:#00000040}.empty-history{padding:40px 20px;text-align:center;color:#999;font-size:13px}.history-panel .session-item{padding:12px;border-radius:10px;cursor:pointer;margin-bottom:4px;transition:all .2s ease;position:relative;border:1px solid transparent}.history-panel .session-item:hover{background:#f0faf5;border-color:#d9f7e8}.history-panel .session-item.active{background:#e6f7ef;border-color:#87d9b0}.history-panel .session-goal{font-weight:500;font-size:13px;margin-bottom:6px;overflow:hidden;text-overflow:ellipsis;white-space:nowrap;color:#1a1a1a}.history-panel .session-meta{display:flex;align-items:center;justify-content:space-between;font-size:11px;color:#aaa;gap:6px}.history-panel .session-delete{position:absolute;top:8px;right:8px;opacity:0;transition:opacity .2s}.history-panel .session-item:hover .session-delete{opacity:1}.goal-input-wrapper{display:flex;flex-direction:column;align-items:center;justify-content:center;height:100%;padding:40px 20px;background:linear-gradient(160deg,#f0faf5,#fafffe 40%,#f7f8fa);position:relative}.role-selection-modal .ant-modal-content{border-radius:16px;padding:0!important;overflow:hidden;box-shadow:0 12px 40px #0000001f}.role-modal-content{text-align:center;padding:32px 28px;background:#fff}.role-modal-logo{margin-bottom:16px}.role-modal-logo img{width:56px;height:56px;border-radius:16px}.role-modal-title{font-size:22px;font-weight:700;color:#1a1a1a;margin-bottom:6px}.role-modal-subtitle{font-size:14px;color:#999;margin-bottom:28px}.role-cards-container{display:grid;grid-template-columns:repeat(3,1fr);gap:12px}.role-card{display:flex;flex-direction:column;align-items:center;padding:24px 16px;background:#f8faf9;border:1.5px solid transparent;border-radius:12px;cursor:pointer;transition:all .25s ease}.role-card:hover{background:#f0faf5;border-color:#00b96b44}.role-card.active{background:#f0faf5;border-color:#00b96b;box-shadow:0 2px 8px #00b96b1a}.role-card-icon{font-size:24px;width:48px;height:48px;display:flex;align-items:center;justify-content:center;border-radius:14px;margin-right:0;margin-bottom:12px;flex-shrink:0;transition:transform .25s ease}.role-card:hover .role-card-icon{transform:scale(1.08)}.role-card-info{flex:1;text-align:center;min-width:0}.role-card-name{font-size:15px;font-weight:600;color:#1a1a1a;margin-bottom:4px}.role-card-desc{font-size:12px;color:#999}.role-card-arrow{display:none}@media (max-width: 768px){.role-cards-container{grid-template-columns:1fr;gap:10px}.role-card{flex-direction:row;padding:14px 16px}.role-card-icon{margin-bottom:0;margin-right:14px}.role-card-info{text-align:left}.role-card-arrow{display:block;font-size:14px;color:#ccc;flex-shrink:0;transition:all .25s ease}.role-card:hover .role-card-arrow{color:#00b96b;transform:translate(3px)}}.guide-modal .ant-modal-content{border-radius:20px;padding:0;overflow:hidden;box-shadow:0 20px 60px #00000026}.guide-carousel-item{display:flex;min-height:520px;background:#fff}.guide-image-section{flex:1.2;background:#fff;padding:40px;display:flex;flex-direction:column;align-items:center;justify-content:center;position:relative;overflow:hidden}.guide-video-badge{position:absolute;top:16px;left:40px;padding:4px 10px;background:#00b96b1a;color:#00b96b;border-radius:20px;font-size:11px;font-weight:600;display:flex;align-items:center;gap:4px;z-index:10}.guide-screenshot{width:100%;height:auto;border-radius:12px;box-shadow:0 10px 30px #0000001a;background:#fff;transition:all .4s ease;margin-top:10px}.guide-screenshot-placeholder{width:100%;aspect-ratio:16 / 9;background:#f8f9fa;border-radius:12px;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:12px;border:2px dashed #eee;margin-top:10px}.guide-screenshot-placeholder .placeholder-icon{font-size:48px;opacity:.15}.guide-screenshot-placeholder .placeholder-text{font-size:13px;color:#999;font-weight:500}.guide-info-section{flex:1;padding:48px 40px;display:flex;flex-direction:column;position:relative}.guide-carousel-dots{bottom:24px!important}.guide-carousel-dots li button{background:#ccc!important;opacity:1!important}.guide-carousel-dots li.slick-active:after{background:#00b96b!important;width:24px!important;opacity:1!important}.guide-image-inner-carousel{width:100%;height:100%}.guide-image-inner-carousel .slick-list,.guide-image-inner-carousel .slick-track{height:100%!important}.guide-image-inner-carousel .guide-screenshot{object-fit:cover;height:440px;width:100%}.guide-image-dots{bottom:12px!important}.guide-image-dots li button{width:6px!important;height:6px!important;border-radius:50%!important;background:#fff6!important}.guide-image-dots li.slick-active button{background:#fff!important;width:16px!important;border-radius:3px!important}.guide-modal .ant-carousel .slick-prev,.guide-modal .ant-carousel .slick-next{width:40px;height:40px;background:#00000014;border-radius:50%;padding:8px;color:#666;z-index:100;display:flex!important;align-items:center;justify-content:center;transition:all .3s}.guide-modal .ant-carousel .slick-prev{left:20px}.guide-modal .ant-carousel .slick-next{right:20px}.guide-modal .ant-carousel .slick-next:after,.guide-modal .ant-carousel .slick-prev:after{margin:12px}.guide-modal .ant-carousel .slick-prev:hover,.guide-modal .ant-carousel .slick-next:hover{background:#00b96b;color:#fff}.guide-tag{font-weight:700;font-size:12px;color:#00b96b;margin-bottom:12px;text-transform:uppercase;letter-spacing:1px}.guide-title{font-size:26px;font-weight:860;color:#1a1a1a;margin-bottom:16px;display:flex;align-items:center;gap:12px}.guide-icon{width:42px;height:42px;display:flex;align-items:center;justify-content:center;border-radius:12px;font-size:22px}.guide-desc{font-size:15px;color:#666;line-height:1.6;margin-bottom:32px;min-height:72px;display:-webkit-box;-webkit-line-clamp:3;line-clamp:3;-webkit-box-orient:vertical;overflow:hidden;text-overflow:ellipsis}.guide-feature-list{flex:1;display:flex;flex-direction:column;gap:12px;margin-bottom:32px}.guide-feature-item{display:flex;align-items:center;gap:12px;padding:12px 16px;background:#f8faf9;border-radius:10px;cursor:pointer;transition:all .2s;border:1px solid transparent}.guide-feature-item:hover{background:#f0faf5}.guide-feature-item.active{background:#f0faf5;border-color:#00b96b33}.guide-feature-dot{width:8px;height:8px;border-radius:50%}.guide-feature-name{font-size:14px;font-weight:600;color:#444}@media (max-width: 768px){.guide-modal,.ant-modal.guide-modal{width:90vw!important;max-width:400px!important;top:2vh!important;padding-bottom:0!important;max-height:96vh!important}.guide-modal .ant-modal-content{padding:0!important;overflow:hidden;max-height:96vh!important;display:flex!important;flex-direction:column!important}.guide-carousel-item{flex-direction:column!important;min-height:auto!important;max-height:calc(96vh - 40px)!important;overflow:hidden!important;padding-bottom:20px!important;border-bottom:none!important}.guide-image-section{padding:24px!important;min-height:120px!important;flex:0 0 auto!important}.guide-video-badge{top:24px!important;left:24px!important}.guide-screenshot{margin-top:32px!important;max-width:100%}.guide-info-section{padding:20px!important;flex:1!important}.guide-title{font-size:18px!important;margin-bottom:8px!important}.guide-icon{width:32px!important;height:32px!important;font-size:16px!important;border-radius:8px!important}.guide-desc{font-size:13px!important;margin-bottom:16px!important;min-height:auto!important}.guide-modal .ant-carousel .slick-prev,.guide-modal .ant-carousel .slick-next{display:none!important}.guide-carousel-dots{bottom:8px!important}}.guide-actions{margin-top:auto}.guide-next-btn{height:48px;font-size:16px;font-weight:600;border-radius:12px;background:#00b96b!important;border-color:#00b96b!important}.guide-link{cursor:pointer;color:#bbb;transition:color .2s}.guide-link:hover{color:#00b96b}@media (max-width: 900px){.guide-layout{flex-direction:column}.guide-image-section{padding:30px;min-height:300px}.guide-info-section{padding:30px}.guide-desc{margin-bottom:20px}}.goal-hero{text-align:center;margin-bottom:36px}.goal-hero .hero-icon{margin-bottom:16px;display:inline-flex;align-items:center;justify-content:center;width:80px;height:80px;border-radius:24px;overflow:hidden}.goal-hero .title{font-size:30px;font-weight:860;color:#111;margin-bottom:8px;letter-spacing:1px;text-align:center}.goal-hero .title .welcome-name{font-size:18px;font-weight:400;color:#666;margin-bottom:4px;display:inline-block}.goal-hero .title .welcome-typing{height:42px;line-height:42px;white-space:nowrap;display:inline-block;margin-left:8px}@media screen and (max-width: 768px){.goal-hero .title .welcome-name{font-size:14px;margin-bottom:2px;display:block;margin-left:0}.goal-hero .title .welcome-typing{font-size:20px;height:32px;line-height:32px;display:block;margin-left:0}}.typing-cursor{display:inline-block;color:#00b96b;font-weight:300;animation:blink .8s step-end infinite;margin-left:1px}@keyframes blink{0%,to{opacity:1}50%{opacity:0}}.goal-hero .subtitle{font-size:15px;color:#888;max-width:600px;line-height:1.6;margin:0 auto;text-align:center}.goal-form{width:100%;max-width:640px}.ant-select-dropdown .rc-virtual-list-holder{scrollbar-width:thin;scrollbar-color:transparent transparent;transition:scrollbar-color .3s}.ant-select-dropdown .rc-virtual-list-holder:hover{scrollbar-color:rgba(0,0,0,.15) transparent}.ant-select-dropdown .rc-virtual-list-holder::-webkit-scrollbar{width:4px}.ant-select-dropdown .rc-virtual-list-holder::-webkit-scrollbar-thumb{background:transparent;border-radius:4px;transition:background .3s}.ant-select-dropdown .rc-virtual-list-holder:hover::-webkit-scrollbar-thumb{background:#00000026}.input-card .chat-input-area{width:100%}.goal-textarea{font-size:15px!important;padding:16px 16px 8px!important;line-height:1.6!important}.goal-textarea::placeholder{color:#bbb}.quick-tags{display:flex;align-items:center;flex-wrap:wrap;gap:8px;margin-top:20px;justify-content:center}.quick-label{font-size:13px;color:#aaa}.quick-tag{cursor:pointer;border-radius:16px;padding:2px 12px;font-size:12px;background:#fff;border-color:#e8e8e8;transition:all .2s}.quick-tag:hover{color:#00b96b;border-color:#87e8de;background:#e6fffb}.version-info{position:absolute;bottom:12px;left:0;right:0;text-align:center;color:#bbb;font-size:12px}.main-panel{display:flex;flex-direction:column;height:100%;background:#f7f8fa}.main-panel .panel-toolbar{display:flex;align-items:center;padding:12px 20px;background:#fff;border-bottom:1px solid #eee;gap:12px;flex-shrink:0;line-height:32px}.main-panel .panel-toolbar .goal-text{flex:1;font-weight:600;font-size:15px;overflow:hidden;text-overflow:ellipsis;white-space:nowrap;color:#1a1a1a}.conversation-area{flex:1;min-height:0}.conversation-area [data-virtuoso-scroller]{overflow-x:hidden!important;scrollbar-width:thin;scrollbar-color:transparent transparent;transition:scrollbar-color .3s}.conversation-area:hover [data-virtuoso-scroller],.conversation-area [data-virtuoso-scroller]:hover{scrollbar-color:rgba(0,0,0,.15) transparent}.conversation-area ::-webkit-scrollbar{width:4px}.conversation-area ::-webkit-scrollbar-thumb{background:transparent;border-radius:4px;transition:background .3s}.conversation-area:hover ::-webkit-scrollbar-thumb{background:#00000026}.conversation-area:active ::-webkit-scrollbar-thumb{background:#00000040}.message-item{display:flex;flex-direction:column;margin-bottom:20px;max-width:860px;width:100%;margin-left:auto;margin-right:auto;padding-left:16px;padding-right:16px;box-sizing:border-box}.message-item.completed,.message-item.user{margin-bottom:10px}.message-item.user{align-items:flex-end}.message-item.assistant{align-items:flex-start}.message-bubble{max-width:90%;padding:12px 16px;border-radius:16px;font-size:14px;line-height:1.7;white-space:pre-wrap;word-break:break-word;margin-bottom:6px}.message-item.user .message-bubble{background:linear-gradient(135deg,#00b96b,#36cfc9);color:#fff;border-bottom-right-radius:6px;box-shadow:0 2px 8px #00b96b33}.message-item.assistant .message-bubble{background:#fff;border:1px solid #eee;border-bottom-left-radius:6px;box-shadow:0 1px 4px #0000000a}.msg-attachments{display:flex;flex-wrap:wrap;gap:8px;margin-top:8px}.msg-attachment-item{display:flex;align-items:center;gap:6px;padding:4px 10px;background:#fff3;border-radius:8px;color:#fff;text-decoration:none;font-size:12px;max-width:200px;transition:background .2s}.msg-attachment-item:hover{background:#ffffff59;color:#fff}.msg-attachment-thumb{width:40px;height:40px;object-fit:cover;border-radius:4px}.msg-attachment-icon{font-size:18px;flex-shrink:0}.msg-attachment-name{overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.message-bubble.markdown-body{white-space:normal}.message-bubble.markdown-body>:first-child{margin-top:0}.message-bubble.markdown-body>:last-child{margin-bottom:0}.message-bubble.markdown-body p{margin:0 0 8px;line-height:1.7}.message-bubble.markdown-body p:last-child{margin-bottom:0}.message-bubble.markdown-body h1,.message-bubble.markdown-body h2,.message-bubble.markdown-body h3,.message-bubble.markdown-body h4{margin:16px 0 8px;font-weight:600}.message-bubble.markdown-body h1{font-size:1.3em}.message-bubble.markdown-body h2{font-size:1.2em}.message-bubble.markdown-body h3{font-size:1.1em}.message-bubble.markdown-body ul,.message-bubble.markdown-body ol{margin:4px 0 8px;padding-left:20px}.message-bubble.markdown-body li{margin:2px 0}.message-bubble.markdown-body blockquote{margin:8px 0;padding:4px 12px;border-left:3px solid #00b96b;background:#f6ffed;color:#555;border-radius:0 6px 6px 0}.message-bubble.markdown-body hr{border:none;border-top:1px solid #eee;margin:12px 0}.message-bubble.markdown-body a{color:#00b96b;text-decoration:none}.message-bubble.markdown-body a:hover{text-decoration:underline}.md-inline-code{background:#f0f5f0;color:#d4380d;padding:1px 6px;border-radius:4px;font-size:.9em;font-family:SFMono-Regular,Consolas,monospace}.md-code-block{margin:8px 0;border-radius:8px;overflow:hidden;border:1px solid #e8e8e8}.md-code-header{display:flex;justify-content:space-between;align-items:center;padding:4px 12px;background:#f5f5f5;font-size:12px;color:#888}.md-code-copy{border:none;background:transparent;color:#00b96b;cursor:pointer;font-size:12px;padding:2px 6px;border-radius:4px}.md-code-copy:hover{background:#e6fffb}.md-table-wrap{overflow-x:auto;margin:8px 0}.message-bubble.markdown-body table{border-collapse:collapse;width:100%;font-size:13px}.message-bubble.markdown-body th,.message-bubble.markdown-body td{border:1px solid #e8e8e8;padding:6px 10px;text-align:left}.message-bubble.markdown-body th{background:#fafafa;font-weight:600}.message-bubble.streaming:after{content:"▍";display:inline;color:#00b96b;animation:blink .8s step-end infinite;font-weight:300}@keyframes blink{50%{opacity:0}}.message-actions{display:flex;gap:2px;opacity:0;transition:opacity .2s;margin-top:4px}.message-item:hover .message-actions{opacity:1}.message-item.user .message-actions{justify-content:flex-end}.msg-action-btn{color:#999;font-size:13px;width:28px;height:28px;border-radius:6px}.msg-action-btn:hover{color:#666;background:#0000000a}.message-edit-area{max-width:86%;width:100%;margin-left:auto}.message-edit-area .ant-input{border-radius:12px;padding:10px 14px;font-size:14px;border:1px solid #d9d9d9}.message-edit-area .ant-input:focus{border-color:#00b96b;box-shadow:0 0 0 2px #00b96b1a}.message-edit-actions{display:flex;justify-content:flex-end;gap:8px;margin-top:8px}.cards-container{padding:14px 20px;background:#fff;border-bottom:1px solid #eee;flex-shrink:0}.cards-container .cards-title{font-weight:600;font-size:13px;margin-bottom:10px;color:#555}.cards-scroll{display:flex;gap:10px;overflow-x:auto;padding-top:6px;padding-bottom:6px;cursor:grab;scroll-behavior:auto;scrollbar-width:thin;scrollbar-color:transparent transparent;transition:scrollbar-color .3s}.cards-scroll:hover{scrollbar-color:rgba(0,0,0,.15) transparent}.cards-scroll::-webkit-scrollbar{height:4px}.cards-scroll::-webkit-scrollbar-thumb{background:transparent;border-radius:4px;transition:background .3s}.cards-scroll:hover::-webkit-scrollbar-thumb{background:#00000026}.cards-scroll:active::-webkit-scrollbar-thumb{background:#00000040}.learning-card{flex-shrink:0;width:150px;padding:12px;border-radius:12px;border:1.5px solid #eee;cursor:pointer;transition:all .3s ease;background:#fff}.learning-card:hover{border-color:#87e8de;box-shadow:0 4px 16px #00b96b1f;transform:translateY(-3px)}.learning-card.active{border-color:#00b96b;background:linear-gradient(135deg,#e6fffb,#d9f7e8)}.learning-card.completed{border-color:#b7eb8f;background:linear-gradient(135deg,#f6ffed,#edf8e6)}.learning-card .card-order{display:inline-flex;align-items:center;justify-content:center;width:20px;height:20px;border-radius:50%;background:#f0f0f0;color:#888;font-size:11px;font-weight:700;line-height:1}.learning-card.active .card-order{background:#00b96b;color:#fff}.learning-card.completed .card-order{background:#52c41a;color:#fff}.learning-card .card-icon{font-size:18px;flex-shrink:0}.learning-card .card-title{font-weight:600;font-size:13px;margin-bottom:3px;color:#1a1a1a;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.learning-card .card-desc{font-size:11px;color:#999;overflow:hidden;display:-webkit-box;-webkit-line-clamp:2;line-clamp:2;-webkit-box-orient:vertical;line-height:1.4}.learning-card .card-time{font-size:11px;color:#bbb}.learning-card .card-bottom{display:flex;align-items:center;justify-content:space-between;margin-top:6px}.learning-card .card-tts-btn{color:#ccc;cursor:pointer;font-size:13px;opacity:0;transition:opacity .2s}.learning-card:hover .card-tts-btn{opacity:1}.learning-card .card-tts-btn:hover{color:#333}.learning-card.card-enter{animation:cardSlideIn .5s cubic-bezier(.34,1.56,.64,1) both}@keyframes cardSlideIn{0%{opacity:0;transform:translateY(20px) scale(.85)}to{opacity:1;transform:translateY(0) scale(1)}}.learning-card.card-status-change{animation:cardPulse .45s ease}@keyframes cardPulse{0%{transform:scale(1)}30%{transform:scale(1.06);box-shadow:0 0 12px #00b96b4d}to{transform:scale(1)}}.todos-panel{background:#fafafa;border:1px solid #e8e8e8;border-radius:12px;overflow:hidden;flex-shrink:0;max-width:860px;margin:0 auto 8px;width:calc(100% - 40px)}.todos-header{display:flex;align-items:center;justify-content:space-between;padding:6px 12px;cursor:pointer;-webkit-user-select:none;user-select:none;font-size:12px;color:#666;transition:background .2s}.todos-header:hover{background:#f0f0f0}.todos-header-left{display:flex;align-items:center;gap:6px}.todos-expand-icon{font-size:10px;transition:transform .2s}.todos-expand-icon.collapsed{transform:rotate(180deg)}.todos-list{padding:2px 12px 8px}.todo-item{display:flex;align-items:flex-start;gap:6px;padding:3px 0;font-size:12px;color:#333;line-height:18px}.todo-item>span:first-of-type{min-width:0;word-break:break-all}.todo-completed{color:#999;text-decoration:line-through}.chat-input-area{padding:8px 8px 4px;padding-bottom:max(4px,env(safe-area-inset-bottom,0px));background:#fff;border:1px solid #e8e8e8;border-radius:16px;display:flex;flex-direction:column;flex-shrink:0;max-width:860px;margin:0 auto 16px;width:calc(100% - 40px);box-shadow:0 2px 12px #0000000f;transition:border-color .3s}.chat-input-area:focus-within{border-color:#00b96b;box-shadow:0 2px 12px #00b96b1a}.chat-input-main{display:flex;align-items:flex-end;gap:8px;padding-left:12px}.chat-context-tags{display:flex;flex-wrap:wrap;gap:6px;padding:4px 12px 2px}.chat-context-tag{display:inline-flex;align-items:center;gap:4px;padding:2px 8px;background:#f0f7ff;border:1px solid #d0e3f7;border-radius:10px;font-size:11px;color:#1677ff;max-width:300px;overflow:hidden}.chat-context-tag-label{overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.chat-context-tag-close{font-size:9px;color:#999;cursor:pointer;flex-shrink:0}.chat-context-tag-close:hover{color:#ff4d4f}.chat-input-options{display:flex;align-items:center;justify-content:space-between;padding:2px 4px 2px 6px;gap:8px}.chat-input-options-left{display:flex;align-items:center;gap:2px;min-width:0;overflow-x:auto;white-space:nowrap;scrollbar-width:none}.chat-input-options-left::-webkit-scrollbar{display:none}.upload-toggle{display:inline-flex;align-items:center;gap:4px;padding:2px 10px;border-radius:12px;font-size:12px;color:#555;cursor:pointer;transition:all .2s;-webkit-user-select:none;user-select:none;height:32px}.upload-toggle:hover{color:#333;background:#f5f5f5}.attachment-list{display:flex;flex-wrap:wrap;gap:6px;padding:4px 12px 2px}.attachment-item{display:flex;align-items:center;gap:6px;padding:4px 8px;background:#f5f5f5;border-radius:8px;font-size:12px;color:#333;max-width:200px}.attachment-item.uploading{color:#999}.attachment-icon{font-size:14px;color:#00b96b;flex-shrink:0}.attachment-name{overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.attachment-remove{font-size:10px;color:#999;cursor:pointer;flex-shrink:0;padding:2px;border-radius:50%;transition:all .2s}.attachment-remove:hover{color:#ff4d4f;background:#ff4d4f1a}.deep-thinking-toggle{display:inline-flex;align-items:center;gap:4px;padding:2px 10px;border-radius:12px;font-size:12px;color:#555;cursor:pointer;transition:all .2s;-webkit-user-select:none;user-select:none;height:32px}.deep-thinking-toggle:hover{color:#333;background:#f5f5f5}.deep-thinking-toggle.active{color:#00b96b;background:#00b96b14;font-weight:500}.upload-menu-overlay{position:fixed;top:0;left:0;right:0;bottom:0;background:#00000073;z-index:1000;display:flex;align-items:flex-end;justify-content:center}.upload-menu-content{width:100%;max-width:500px;background:#f7f7f7;border-radius:12px 12px 0 0;overflow:hidden;animation:slideUp .3s ease-out}@keyframes slideUp{0%{transform:translateY(100%)}to{transform:translateY(0)}}.upload-menu-item{padding:16px;background:#fff;text-align:center;font-size:16px;color:#333;cursor:pointer;display:flex;align-items:center;justify-content:center;gap:12px;border-bottom:1px solid #f0f0f0}.upload-menu-item:active{background:#f5f5f5}.upload-menu-cancel{margin-top:8px;padding:16px;background:#fff;text-align:center;font-size:16px;color:#ff4d4f;cursor:pointer}.upload-menu-cancel:active{background:#f5f5f5}.chat-textarea{font-size:14px;line-height:1.6;padding:6px 0;resize:none}.learning-panel,.exam-panel,.grading-panel,.wrong-question-panel,.courseware-panel{height:100%;background:#fff;border-left:1px solid #eee;box-shadow:-4px 0 16px #0000000a;display:flex;flex-direction:column;flex-shrink:0;overflow:hidden;position:relative;z-index:5;animation:panelSlideIn .3s cubic-bezier(.25,.46,.45,.94) both}.panel-fullscreen{position:fixed!important;top:0!important;left:0!important;right:0!important;bottom:0!important;width:100%!important;height:100vh!important;z-index:1000!important;border-left:none!important;animation:none!important}.side-panel-container{display:flex;position:relative;z-index:50;background:transparent}.selection-highlight-frame{border:2px dashed #1677ff;border-radius:4px;background:#1677ff0f;pointer-events:none;animation:selectionFrameFadeIn .15s ease-out}.selection-ask-container{pointer-events:auto}.selection-ask-toolbar{animation:selectionToolbarFadeIn .15s ease-out;max-width:320px}.selection-ask-toolbar>.ant-btn{border-radius:16px;box-shadow:0 2px 8px #1677ff59;font-weight:500;padding:0 14px;height:32px;line-height:32px}.selection-ask-toolbar>.ant-btn:hover{box-shadow:0 4px 12px #1677ff80;transform:translateY(-1px)}.selection-ask-toolbar.expanded{background:#fff;border-radius:12px;box-shadow:0 8px 24px #0000001f,0 2px 8px #00000014;padding:12px 14px;min-width:340px;max-width:400px;border:1px solid rgba(0,0,0,.06)}.selection-ask-quote{font-size:12px;color:#555;margin-bottom:10px;padding:6px 10px;background:linear-gradient(135deg,#f0f5ff,#f5f5f5);border-radius:6px;border-left:3px solid #1677ff;line-height:1.6;word-break:break-all;max-height:60px;overflow:hidden;text-overflow:ellipsis}.selection-ask-input-row{display:flex;gap:6px;align-items:center}.selection-ask-input-row .ant-input{flex:1;border-radius:6px}.selection-ask-input-row>.ant-btn-primary{border-radius:6px;min-width:32px}.selection-ask-input-row>.ant-btn-text{color:#999}.selection-ask-input-row>.ant-btn-text:hover{color:#ff4d4f}@keyframes selectionToolbarFadeIn{0%{opacity:0;transform:translateY(6px)}to{opacity:1;transform:translateY(0)}}@keyframes selectionFrameFadeIn{0%{opacity:0}to{opacity:1}}@keyframes panelSlideIn{0%{transform:translate(30px);opacity:0}to{transform:translate(0);opacity:1}}.learning-panel-resize-handle,.exam-panel-resize-handle,.grading-panel-resize-handle,.courseware-panel-resize-handle{position:absolute;left:0;top:0;bottom:0;width:4px;cursor:col-resize;z-index:10;transition:background .2s}.learning-panel-resize-handle:hover,.learning-panel-resize-handle.dragging,.exam-panel-resize-handle:hover,.exam-panel-resize-handle.dragging,.grading-panel-resize-handle:hover,.grading-panel-resize-handle.dragging,.courseware-panel-resize-handle:hover,.courseware-panel-resize-handle.dragging{background:#00b96b}.learning-panel-header{display:flex;align-items:center;justify-content:space-between;padding:12px 20px;font-weight:500;font-size:15px;flex-shrink:0;gap:12px;line-height:32px}.learning-panel-body{display:flex;flex-direction:column;flex:1;overflow:hidden;padding:16px 0 16px 16px}.learning-panel-content{flex:1;overflow-y:auto;padding:0 16px 16px 0;line-height:1.8;scrollbar-width:thin;scrollbar-color:transparent transparent;transition:scrollbar-color .3s}.learning-panel-content:hover{scrollbar-color:rgba(0,0,0,.15) transparent}.learning-panel-content::-webkit-scrollbar{width:4px}.learning-panel-content::-webkit-scrollbar-thumb{background:transparent;border-radius:4px;transition:background .3s}.learning-panel-content:hover::-webkit-scrollbar-thumb{background:#00000026}.learning-panel-content:active::-webkit-scrollbar-thumb{background:#00000040}.learning-panel-content h1,.learning-panel-content h2,.learning-panel-content h3{margin-top:16px;margin-bottom:8px}.learning-panel-content pre{background:#f5f5f5;padding:12px;border-radius:6px;overflow-x:auto}.learning-panel-content ul,.learning-panel-content ol{margin:8px 0 12px;padding-left:24px}.learning-panel-content ul{list-style:none}.learning-panel-content ul>li{position:relative;padding-left:6px;margin:6px 0;line-height:1.7}.learning-panel-content ul>li:before{content:"";position:absolute;left:-14px;top:10px;width:6px;height:6px;border-radius:50%;background:#00b96b}.learning-panel-content ol{list-style:none;counter-reset:ol-counter}.learning-panel-content ol>li{position:relative;padding-left:6px;margin:6px 0;line-height:1.7;counter-increment:ol-counter}.learning-panel-content ol>li:before{content:counter(ol-counter);position:absolute;left:-22px;top:2px;width:20px;height:20px;border-radius:50%;background:#00b96b;color:#fff;font-size:12px;font-weight:600;display:flex;align-items:center;justify-content:center;line-height:1}.learning-panel-content li>ul,.learning-panel-content li>ol{margin:4px 0}.learning-panel-content li>ul>li:before{width:5px;height:5px;background:#8cc8a8;top:11px}.lp-type-explain ul>li:before{background:#1677ff}.lp-type-explain ol>li:before{background:#1677ff}.lp-type-explain li>ul>li:before{background:#91caff}.lp-type-example ul>li:before{background:#722ed1}.lp-type-example ol>li:before{background:#722ed1}.lp-type-example li>ul>li:before{background:#d3adf7}.lp-type-qa ul>li:before{background:#eb2f96}.lp-type-qa ol>li:before{background:#eb2f96}.lp-type-qa li>ul>li:before{background:#ffadd2}.lp-type-diagnose ul>li:before,.lp-type-practice ul>li:before,.lp-type-consolidate ul>li:before{background:#52c41a}.lp-type-diagnose ol>li:before,.lp-type-practice ol>li:before,.lp-type-consolidate ol>li:before{background:#52c41a}.lp-type-diagnose li>ul>li:before,.lp-type-practice li>ul>li:before,.lp-type-consolidate li>ul>li:before{background:#b7eb8f}.section-tip ul>li:before{background:#faad14}.section-tip ol>li:before{background:#faad14}.section-tip li>ul>li:before{background:#ffe58f}.section-warning ul>li:before{background:#fa541c}.section-warning ol>li:before{background:#fa541c}.section-warning li>ul>li:before{background:#ffbb96}.section-example ul>li:before{background:#722ed1}.section-example ol>li:before{background:#722ed1}.section-example li>ul>li:before{background:#d3adf7}.section-steps ul>li:before{background:#13c2c2}.section-steps ol>li:before{background:#13c2c2}.section-steps li>ul>li:before{background:#87e8de}.section-formula ul>li:before{background:#2f54eb}.section-formula ol>li:before{background:#2f54eb}.section-formula li>ul>li:before{background:#adc6ff}.learning-panel-content table{border-collapse:collapse;width:100%;font-size:14px;margin:8px 0 12px}.learning-panel-content th,.learning-panel-content td{border:1px solid #e8e8e8;padding:8px 12px;text-align:left}.learning-panel-content th{background:#fafafa;font-weight:600;color:#333}.learning-panel-content tr:hover{background:#fafafa}.learning-panel-footer{border-top:1px solid #f0f0f0;padding-top:12px;display:flex;gap:8px}.question-card{position:relative;background:#fafafa;border:1px solid #e8e8e8;border-radius:8px;padding:16px;margin:12px 0}.question-card .question-text{font-weight:500;margin-bottom:12px;display:flex;align-items:flex-start;justify-content:space-between;gap:4px}.question-card .option-item{padding:8px 12px;border:1px solid #e0e0e0;border-radius:6px;margin-bottom:6px;cursor:pointer;transition:all .2s}.question-card .option-item:hover{background:#e6fffb;border-color:#87e8de}.question-card .option-item.selected{background:#e6fffb;border-color:#00b96b;font-weight:500}.question-card .option-item.correct{background:#f6ffed;border-color:#52c41a}.question-card .option-item.wrong{background:#fff2f0;border-color:#ff4d4f}.question-explanation{margin-top:8px;padding:8px;background:#f0f5ff;border-radius:6px}.inline-markdown{display:inline}.inline-markdown>div{display:inline}.inline-markdown p,.inline-markdown .katex-display{display:inline;margin:0}.inline-markdown .katex-display>.katex{display:inline}.lp-title{margin:0 0 16px;font-size:16px;font-weight:600;color:#1a1a1a}.lp-content-block{padding:16px;border-radius:10px;margin-bottom:16px;line-height:1.8;font-size:14px;position:relative}.lp-block-tts{float:right;margin:-4px -8px 0 8px;opacity:0;transition:opacity .2s}.lp-content-block:hover .lp-block-tts{opacity:1}.lp-block-tts .ant-btn{color:#bbb}.lp-block-tts .ant-btn:hover{color:#333}.lp-content-block>:first-child{margin-top:0}.lp-content-block>:last-child{margin-bottom:0}.lp-type-explain{background:#f0f7ff;border-left:4px solid #1677ff}.lp-type-example{background:#f9f0ff;border-left:4px solid #722ed1}.lp-type-qa{background:#fff0f6;border-left:4px solid #eb2f96}.lp-type-diagnose,.lp-type-practice,.lp-type-consolidate{background:#f6ffed;border-left:4px solid #52c41a}.lp-type-default{background:#fafafa;border:1px solid #e8e8e8}.lp-sections{display:flex;flex-direction:column;gap:12px;margin-bottom:16px}.lp-section{position:relative;border-radius:8px;padding:14px 16px;background:#fafafa;border:1px solid #f0f0f0}.lp-section-title{font-weight:600;font-size:14px;margin-bottom:8px;color:#333;display:flex;align-items:center;justify-content:space-between}.lp-section-actions{display:flex;align-items:center;gap:2px;flex-shrink:0}.lp-section-tts-btn,.lp-section-actions>.note-btn{color:#bbb!important;flex-shrink:0;opacity:0;transition:opacity .2s}.lp-section:hover .lp-section-tts-btn,.lp-section:hover .lp-section-actions>.note-btn{opacity:1}.lp-section-tts-btn:hover{color:#333!important}.lp-section-content{font-size:14px;line-height:1.7}.lp-section-content>:first-child{margin-top:0}.lp-section-content>:last-child{margin-bottom:0}.lp-section.section-tip{background:#fffbe6;border-color:#ffe58f}.lp-section.section-warning{background:#fff2e8;border-color:#ffbb96}.lp-section.section-example{background:#f9f0ff;border-color:#d3adf7}.lp-section.section-steps{background:#e6fffb;border-color:#87e8de}.lp-section.section-formula{background:#f0f5ff;border-color:#adc6ff}.lp-questions-divider{display:flex;align-items:center;gap:8px;margin:20px 0 12px;font-size:15px;font-weight:600;color:#00b96b}.lp-questions-divider:after{content:"";flex:1;height:1px;background:linear-gradient(to right,#00b96b40,transparent)}.lp-summary{margin-top:16px;padding:12px 16px;background:#fffbe6;border:1px solid #ffe58f;border-radius:8px}.lp-summary-text{margin-top:6px;font-size:14px;line-height:1.7}.lp-summary-text>:first-child{margin-top:0}.lp-summary-text>:last-child{margin-bottom:0}.lp-loading-footer{display:flex;align-items:center;justify-content:center;padding:16px;margin-top:16px;background:#f5f5f5;border-radius:4px;border:1px solid #e8e8e8;gap:8px}.lp-complete-bar{margin-top:24px;padding:16px 0 8px}.note-btn{color:#999;font-size:12px;padding:2px 6px;height:auto}.question-card>.note-btn,.question-text>.note-btn,.question-actions>.note-btn{flex-shrink:0;visibility:hidden}.question-card:hover>.note-btn,.question-card:hover .question-text>.note-btn,.question-card:hover .question-actions>.note-btn{visibility:visible}.question-actions{display:flex;align-items:center;gap:2px;flex-shrink:0}.question-tts-btn{color:#bbb!important;flex-shrink:0;opacity:0;transition:opacity .2s}.question-card:hover .question-tts-btn{opacity:1}.question-tts-btn:hover{color:#333!important}.note-btn:hover{color:#1677ff}.note-display{margin-top:8px;padding:8px 12px;background:#fffbe6;border:1px solid #ffe58f;border-radius:6px;font-size:13px}.note-display-header{display:flex;justify-content:space-between;align-items:center;font-size:12px;color:#ad8b00;margin-bottom:4px}.note-display-actions{display:flex;gap:2px}.note-display-actions .ant-btn{font-size:12px;padding:0 4px;height:20px}.note-display-content{color:#595959;line-height:1.6;white-space:pre-wrap}.note-editor{margin-top:8px;display:flex;flex-direction:column;gap:6px}.note-editor textarea{font-size:13px}.note-editor-actions{display:flex;gap:6px;justify-content:flex-end}.notes-tab-list{padding:0}.notes-tab-item{padding:10px 14px;border-bottom:1px solid #f0f0f0;cursor:default}.notes-tab-item:hover{background:#fafafa}.notes-tab-item-header{display:flex;align-items:center;gap:6px;margin-bottom:4px}.notes-tab-item-type{font-size:11px;color:#fff;background:#1677ff;border-radius:3px;padding:0 5px;line-height:18px;flex-shrink:0}.notes-tab-item-title{font-size:13px;font-weight:500;color:#333;overflow:hidden;text-overflow:ellipsis;white-space:nowrap;flex:1;min-width:0}.notes-tab-item-delete{flex-shrink:0;opacity:0;transition:opacity .2s}.notes-tab-item:hover .notes-tab-item-delete{opacity:1}.notes-tab-item-content{font-size:13px;color:#595959;line-height:1.5;white-space:pre-wrap;word-break:break-word}.notes-tab-item-meta{font-size:11px;color:#bbb;margin-top:4px}.progress-bar{display:flex;align-items:center;gap:8px;padding:8px 20px;background:#fff;flex-shrink:0}.progress-bar .progress-label{font-size:12px;color:#999;flex-shrink:0}.progress-bar .progress-toggle{display:inline-flex;align-items:center;justify-content:center;width:24px;height:24px;border-radius:6px;cursor:pointer;color:#999;font-size:12px;transition:all .2s;flex-shrink:0}.progress-bar .progress-toggle:hover{background:#f0f0f0;color:#00b96b}.history-close-btn,.tab-content-header .ant-btn-close{display:none}.tab-content-header .back-btn{display:inline-flex!important}@media (max-width: 768px){.history-close-btn,.tab-content-header .ant-btn{display:inline-flex!important}.history-sider{position:fixed!important;left:0;top:0;bottom:0;z-index:100;box-shadow:4px 0 16px #0000001a}.history-sider:not(.ant-layout-sider-collapsed){width:100%!important;max-width:100%!important}.message-bubble{max-width:96%}.goal-input-wrapper{padding:24px 16px}.goal-hero .title{font-size:20px;white-space:normal;height:auto;line-height:1.4}.goal-hero .hero-icon{width:64px;height:64px;font-size:36px;border-radius:18px}.input-card{border-radius:12px}.cards-scroll{flex-wrap:nowrap}.quick-tags{display:flex;justify-content:center;margin-top:24px;padding:0 16px}.learning-panel{position:fixed;top:0;right:0;bottom:0;width:100%!important;z-index:100}.chat-input-area{width:calc(100% - 24px)}}.chart-bubble{background:#fff;border:1px solid #e8e8e8;border-radius:14px;padding:16px;margin:8px 0;min-width:300px;max-width:520px;box-shadow:0 1px 4px #0000000f;position:relative;transition:max-width .3s ease,width .3s ease}.chart-bubble.chart-expanded{max-width:none;width:auto;align-self:stretch}.message-item.assistant:has(.chart-expanded){align-items:stretch}.chart-bubble-title{font-weight:600;font-size:14px;color:#1a1a1a;margin-bottom:12px;text-align:center;padding-right:28px}.chart-bubble-expand{position:absolute;top:10px;right:10px;width:28px;height:28px;border:none;background:#0000000a;border-radius:6px;cursor:pointer;display:flex;align-items:center;justify-content:center;font-size:14px;color:#666;transition:background .2s;z-index:1}.chart-bubble-expand:hover{background:#00000014;color:#333}.chart-bubble-canvas{position:relative;height:320px;transition:height .3s ease}.chart-expanded .chart-bubble-canvas{height:460px}.chart-inline .chart-bubble{border:none;box-shadow:none;padding:8px 0;max-width:none}.chart-inline .chart-bubble-expand{display:none}.card-link-bubble{display:flex;align-items:center;gap:14px;padding:16px 18px;background:linear-gradient(135deg,#f6ffed,#e6f7ef);border:1px solid #b7eb8f;border-radius:14px;cursor:pointer;transition:all .25s ease;max-width:340px;margin:8px 0;position:relative;overflow:hidden}.card-link-bubble:hover{border-color:#00b96b;box-shadow:0 4px 12px #00b96b2e;transform:translateY(-1px)}.card-link-icon{font-size:26px;color:#00b96b;flex-shrink:0}.card-link-info{flex:1;min-width:0;display:flex;flex-direction:column;gap:6px}.card-link-title{font-weight:600;font-size:14px;color:#1a1a1a;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.card-link-meta{display:flex;align-items:center;gap:8px}.card-link-hint{font-size:12px;color:#999;transition:color .2s}.card-link-time{font-size:12px;color:#aaa}.card-link-bubble:hover .card-link-hint{color:#00b96b}.card-link-illustration{width:40px;height:48px;flex-shrink:0;transition:transform .3s ease}.card-link-illustration svg{width:100%;height:100%}.card-link-bubble:hover .card-link-illustration{transform:translateY(-3px) rotate(-3deg) scale(1.08)}.lp-section,.question-card,.lp-content-block,.lp-summary{animation:cardFadeIn .35s ease both}.lp-section:nth-child(1){animation-delay:0s}.lp-section:nth-child(2){animation-delay:.08s}.lp-section:nth-child(3){animation-delay:.16s}.lp-section:nth-child(4){animation-delay:.24s}.lp-section:nth-child(5){animation-delay:.32s}.lp-section:nth-child(6){animation-delay:.4s}.question-card:nth-child(1){animation-delay:0s}.question-card:nth-child(2){animation-delay:.1s}.question-card:nth-child(3){animation-delay:.2s}.question-card:nth-child(4){animation-delay:.3s}@keyframes cardFadeIn{0%{opacity:0;transform:translateY(12px)}to{opacity:1;transform:translateY(0)}}.agent-events-block{display:flex;flex-direction:column;gap:2px;margin-bottom:6px}.agent-event{display:flex;align-items:center;gap:5px;padding:2px 0;color:#999;font-size:12px;line-height:1.6}.event-icon{font-size:12px;flex-shrink:0}.event-status{font-size:12px;margin-left:2px}.subagent-toggle{display:inline-flex;align-items:center;gap:4px;font-size:12px;color:#999;cursor:pointer;padding:2px 0;-webkit-user-select:none;user-select:none}.subagent-toggle:hover{color:#666}.subagent-text-wrapper{padding-left:12px;border-left:2px solid #e8e8e8;margin-left:4px}.sidebar-tabs{height:100%;display:flex;flex-direction:column;background:#fff;overflow:hidden}.sidebar-tabs>.tab-content{flex:1;display:flex;flex-direction:column;overflow:hidden;padding:12px}.tab-content{padding:0!important;height:100%;display:flex;flex-direction:column;overflow:hidden}.tab-content-header{display:flex;align-items:center;justify-content:space-between;padding:12px 16px;font-weight:600;font-size:14px;color:#1a1a1a;border-bottom:1px solid #f0f0f0;flex-shrink:0;line-height:32px}.tab-content-header>div:first-child{min-width:0;flex:1;overflow:hidden}.tab-content-header>div:first-child span{display:block;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}.tab-content-list,.exam-paper-content,.grading-panel{flex:1;overflow-y:auto;padding:0;scrollbar-width:thin;scrollbar-color:transparent transparent;transition:scrollbar-color .3s}.tab-content-list::-webkit-scrollbar,.exam-paper-content::-webkit-scrollbar,.grading-panel::-webkit-scrollbar{width:4px}.tab-content-list::-webkit-scrollbar-thumb,.exam-paper-content::-webkit-scrollbar-thumb,.grading-panel::-webkit-scrollbar-thumb{background:transparent;border-radius:4px;transition:background .3s}.tab-content-list:hover,.exam-paper-content:hover,.grading-panel:hover{scrollbar-color:rgba(0,0,0,.15) transparent}.tab-content-list:hover::-webkit-scrollbar-thumb,.exam-paper-content:hover::-webkit-scrollbar-thumb,.grading-panel:hover::-webkit-scrollbar-thumb{background:#00000026}.tab-content-list:active::-webkit-scrollbar-thumb,.exam-paper-content:active::-webkit-scrollbar-thumb,.grading-panel:active::-webkit-scrollbar-thumb{background:#00000040}.tab-content-header .ant-btn{color:#999}.tab-content-header .ant-btn:hover{color:#333}.tab-content .ant-list{margin-bottom:0}.tab-content .ant-list-item{padding:10px 8px;border-bottom:1px solid #f0f0f0;cursor:pointer;transition:background .2s}.tab-content .ant-list-item:hover{background:#f5f5f5}.tab-content .ant-list-item .ant-btn-dangerous{opacity:0;transition:opacity .2s ease}.tab-content .ant-list-item:hover .ant-btn-dangerous{opacity:1}.tab-content .ant-empty{margin-top:40px}.history-tab-content{display:flex;flex-direction:column;height:100%}.history-tab-content .panel-header{display:flex;align-items:center;justify-content:space-between;padding:12px 12px 0}.history-tab-content .session-list{flex:1;overflow-y:auto;padding:0 8px 8px}.exam-panel{height:100vh;width:480px;min-width:360px;background:#fff;border-left:none;box-shadow:-4px 0 16px #00000014;display:flex;flex-direction:column;flex-shrink:0;overflow:hidden;position:relative;z-index:5}.file-preview-header{display:flex;align-items:center;justify-content:space-between;padding:12px 16px;border-bottom:1px solid #f0f0f0;flex-shrink:0;line-height:32px}.file-preview-title{font-weight:600;font-size:14px;overflow:hidden;white-space:nowrap;text-overflow:ellipsis;flex:1;margin-right:8px}.file-preview-actions{display:flex;align-items:center;gap:4px;flex-shrink:0}.file-preview-body{flex:1;overflow:auto;display:flex;align-items:center;justify-content:center;background:#fafafa}.file-preview-image{max-width:100%;max-height:100%;object-fit:contain}.file-preview-iframe{width:100%;height:100%;border:none}.file-preview-fallback{text-align:center;color:#999;padding:40px 20px}.file-preview-fallback p{margin-bottom:16px}.exam-paper-header{display:flex;align-items:center;justify-content:space-between;padding:12px 16px;border-bottom:1px solid #f0f0f0;flex-shrink:0;line-height:32px}.exam-paper-title{display:flex;align-items:center;font-weight:600;font-size:14px;overflow:hidden;white-space:nowrap;text-overflow:ellipsis;flex:1}.exam-paper-actions{display:flex;align-items:center;gap:4px;flex-shrink:0}.exam-paper-content{flex:1;overflow-y:auto;padding:16px;scroll-behavior:smooth}.exam-paper-html{line-height:1.42;outline:none;-moz-tab-size:4;tab-size:4;text-align:left;word-wrap:break-word;font-size:13px;counter-reset:list-0 list-1 list-2 list-3 list-4 list-5 list-6 list-7 list-8 list-9;display:flex;flex-direction:column;padding:20px}.exam-paper-html p,.exam-paper-html ol,.exam-paper-html ul,.exam-paper-html pre,.exam-paper-html blockquote,.exam-paper-html h1,.exam-paper-html h2,.exam-paper-html h3,.exam-paper-html h4,.exam-paper-html h5,.exam-paper-html h6{margin:0;padding:0}.exam-paper-html p,.exam-paper-html ol,.exam-paper-html ul{padding-left:0;margin:5px 0}.exam-paper-html li{list-style-type:none;padding-left:1.5em;position:relative}.exam-paper-html li:before{display:inline-block;margin-left:-1.5em;margin-right:.3em;text-align:right;white-space:nowrap;width:1.2em;position:absolute}.exam-paper-html li[data-list=bullet]:before{content:"•"}.exam-paper-html li[data-list=ordered]{counter-increment:list-0}.exam-paper-html li[data-list=ordered]:before{content:counter(list-0,decimal) ". "}.exam-paper-html .ql-indent-1:not(.ql-direction-rtl){padding-left:3em}.exam-paper-html li.ql-indent-1:not(.ql-direction-rtl){padding-left:4.5em}.exam-paper-html .ql-indent-2:not(.ql-direction-rtl){padding-left:6em}.exam-paper-html li.ql-indent-2:not(.ql-direction-rtl){padding-left:7.5em}.exam-paper-html .ql-indent-3:not(.ql-direction-rtl){padding-left:9em}.exam-paper-html li.ql-indent-3:not(.ql-direction-rtl){padding-left:10.5em}.exam-paper-html .ql-align-center{text-align:center}.exam-paper-html .ql-align-justify{text-align:justify}.exam-paper-html .ql-align-right{text-align:right}.exam-paper-html h1{font-size:2em}.exam-paper-html h2{font-size:1.5em}.exam-paper-html h3{font-size:1.17em}.exam-paper-html h4{font-size:1em}.exam-paper-html h5{font-size:.83em}.exam-paper-html h6{font-size:.67em}.exam-paper-html blockquote{border-left:4px solid #ccc;margin-bottom:5px;margin-top:5px;padding-left:16px}.exam-paper-html code,.exam-paper-html .ql-code-block-container{background-color:#f0f0f0;border-radius:3px}.exam-paper-html .ql-code-block-container{margin-bottom:5px;margin-top:5px;padding:5px 10px;font-family:monospace}.exam-paper-html table{border-collapse:collapse;width:100%;table-layout:fixed}.exam-paper-html td,.exam-paper-html th{border:none;padding:2px 5px;word-break:break-all}.exam-paper-html table,.exam-paper-html table.ql-table-bordered,.exam-paper-html table td,.exam-paper-html table th,.exam-paper-html table.ql-table-bordered td,.exam-paper-html table.ql-table-bordered th{border:1px dashed #eee}.exam-paper-html th{background:#0000000d}.exam-paper-html img{max-width:100%;height:auto}.exam-paper-loading{display:flex;flex-direction:column;align-items:center;justify-content:center;height:200px;color:#999}.exam-paper-loading p{margin-top:12px}.grading-panel{height:100vh;width:420px;min-width:320px;background:#fff;border-left:none;box-shadow:-4px 0 16px #00000014;display:flex;flex-direction:column;flex-shrink:0;overflow:hidden;position:relative;z-index:5}.grading-panel-header{display:flex;align-items:center;justify-content:space-between;padding:12px 16px;border-bottom:1px solid #f0f0f0;flex-shrink:0}.grading-panel-title{display:flex;align-items:center;font-weight:600;font-size:14px;flex:1}.grading-progress-section{padding:16px;border-bottom:1px solid #f0f0f0}.grading-progress-msg{margin-top:8px;font-size:13px;color:#666}.grading-stats{display:flex;padding:12px 16px;gap:8px;border-bottom:1px solid #f0f0f0}.grading-stat-item{flex:1;display:flex;flex-direction:column;align-items:center;gap:2px}.grading-stat-item .stat-value{font-size:18px;font-weight:700}.grading-stat-item .stat-label{font-size:12px;color:#999}.grading-images{display:flex;gap:8px;padding:12px 16px;border-bottom:1px solid #f0f0f0;overflow-x:auto;flex-shrink:0}.grading-thumb{position:relative;flex-shrink:0;width:60px;height:80px;border-radius:4px;overflow:hidden;cursor:pointer;border:2px solid transparent;transition:border-color .2s,box-shadow .2s}.grading-thumb:hover{border-color:#1677ff;box-shadow:0 2px 8px #1677ff33}.grading-thumb img{width:100%;height:100%;object-fit:cover;display:block}.grading-thumb-mask{position:absolute;top:0;right:0;bottom:0;left:0;display:flex;align-items:center;justify-content:center;gap:4px;background:#0006;color:#fff;font-size:14px;opacity:0;transition:opacity .2s}.grading-thumb:hover .grading-thumb-mask{opacity:1}.zoom-pan-container{width:100%;height:100%;overflow:hidden;cursor:grab;position:relative;touch-action:none;-webkit-user-select:none;user-select:none}.zoom-pan-container:active{cursor:grabbing}.zoom-pan-content{transform-origin:center center;will-change:transform;transition:none}.zoom-pan-indicator{position:absolute;bottom:12px;right:12px;background:#0000008c;color:#fff;padding:2px 10px;border-radius:12px;font-size:12px;pointer-events:none}.grading-preview-modal .ant-modal-close{color:#ffffffb3}.grading-preview-modal .ant-modal-close:hover{color:#fff}.grading-preview-modal .ant-modal-body{overflow:hidden;scrollbar-width:thin;scrollbar-color:transparent transparent;transition:scrollbar-color .3s}.grading-preview-modal .ant-modal-body:hover{scrollbar-color:rgba(0,0,0,.15) transparent}.grading-preview-modal .ant-modal-body::-webkit-scrollbar{width:4px}.grading-preview-modal .ant-modal-body::-webkit-scrollbar-thumb{background:transparent;border-radius:4px;transition:background .3s}.grading-preview-modal .ant-modal-body:hover::-webkit-scrollbar-thumb{background:#00000026}.grading-preview-modal .ant-modal-body:active::-webkit-scrollbar-thumb{background:#00000040}.grading-preview-mobile .ant-modal-content{height:100vh;display:flex;flex-direction:column}.grading-preview-mobile .ant-modal-body{flex:1;display:flex;flex-direction:column;justify-content:center}.grading-preview-mobile .ant-modal-close{color:#ffffffb3}.grading-preview-mobile .ant-modal-close:hover{color:#fff}.grading-preview-mobile .grading-img-nav{color:#fffc}.marker-page{position:relative;width:100%;background:#fafafa}.marker-rect{position:absolute;border-style:solid;border-radius:4px;pointer-events:none;display:flex;align-items:center;justify-content:center;background:#fff3;z-index:1;transition:all .3s}.marker-rect.marker-active{background:#1890ff33;z-index:10}.marker-icon{position:absolute;top:-10px;left:-10px;background:#fff;border-radius:50%;line-height:0;box-shadow:0 0 2px #0000004d;transition:transform .3s}.grading-img-nav{display:flex;align-items:center;justify-content:center;gap:12px;padding:12px 0;font-size:13px;color:#666}.grade-item{cursor:pointer}.grading-items-toolbar{display:flex;align-items:center;justify-content:space-between;padding:8px 16px 0;flex-shrink:0}.grading-items-list{flex:1;overflow-y:auto;padding:12px 16px;scrollbar-width:thin;scrollbar-color:transparent transparent;transition:scrollbar-color .3s}.grading-items-list:hover{scrollbar-color:rgba(0,0,0,.15) transparent}.grading-items-list.grading-items-two-col{display:grid;grid-template-columns:1fr 1fr;gap:8px;align-content:start}.grading-items-list::-webkit-scrollbar{width:4px}.grading-items-list::-webkit-scrollbar-thumb{background:transparent;border-radius:4px;transition:background .3s}.grading-items-list:hover::-webkit-scrollbar-thumb{background:#00000026}.grading-items-list:active::-webkit-scrollbar-thumb{background:#00000040}.grade-item{padding:10px 12px;border-radius:8px;margin-bottom:8px;border:1px solid #f0f0f0;transition:all .3s cubic-bezier(.4,0,.2,1);cursor:pointer}.grading-items-two-col .grade-item{margin-bottom:0}.grade-item:hover{background:#fafafa}.grade-item-active{border-color:#1890ff;background:#f0f7ff;box-shadow:0 2px 8px #1890ff26;transform:translateY(-1px)}.grade-item-correct{border-left:3px solid #00b96b}.grade-item-wrong{border-left:3px solid #ff3141}.grade-item-header{display:flex;align-items:center;gap:6px;margin-bottom:6px}.grade-item-index{font-weight:600;font-size:13px}.grade-item-question{font-size:13px;color:#333;margin-bottom:4px}.grade-item-answer,.grade-item-analysis{font-size:12px;color:#666;margin-bottom:2px}.grade-item-label{color:#999}.grade-item-correct-answer{font-size:12px;color:#00b96b;margin-bottom:2px}.grade-item-tags{display:flex;flex-wrap:wrap;gap:4px;margin-top:4px}.grade-item-tags:empty{display:none}.grade-item-edit-btn{opacity:0;transition:opacity .2s}.grade-item:hover .grade-item-edit-btn{opacity:1}.grade-item-editing{border:2px solid #1677ff!important;background:#f0f5ff!important}.grade-edit-row{display:flex;align-items:center;gap:8px;margin-bottom:6px;font-size:13px}.grade-edit-row .grade-item-label{min-width:42px;flex-shrink:0}@media (max-width: 768px){.exam-panel,.grading-panel,.courseware-panel{position:fixed;top:0;right:0;width:100vw;height:100vh;z-index:100}}.ask-user-bubble{background:#fff;border:1px solid #e8ecf0;border-radius:12px;padding:14px 16px;margin:8px 0;max-width:420px}.ask-user-question{font-size:14px;font-weight:500;color:#1a1a1a;margin-bottom:10px;line-height:1.5}.ask-user-options{display:flex;flex-wrap:wrap;gap:8px;margin-bottom:8px}.ask-user-tag{cursor:pointer;padding:4px 14px;border-radius:16px;font-size:13px;transition:all .2s;-webkit-user-select:none;user-select:none;max-width:100%;overflow-wrap:break-word;white-space:normal;line-height:1.4}.ask-user-tag:not(.disabled):hover{color:#1677ff;border-color:#1677ff}.ask-user-tag.selected{cursor:default;font-weight:500}.ask-user-tag.disabled{cursor:default;opacity:.65}.ask-user-tag.disabled.selected{opacity:1;color:#1677ff;border-color:#1677ff;background:#e6f4ff}.ask-user-confirm{margin-top:4px;margin-bottom:4px}.ask-user-bottom-row{display:flex;align-items:center;gap:8px;margin-top:6px}.ask-user-bottom-row .ask-user-custom{flex:1}.ask-user-selected{margin-top:6px;font-size:12px;color:#888}.dynamic-form-bubble{background:#fff;border:1px solid #e8ecf0;border-radius:12px;padding:14px 16px;margin:8px 0;max-width:420px}.dynamic-form-title{font-size:14px;font-weight:500;color:#1a1a1a;margin-bottom:12px;line-height:1.5}.dynamic-form-body .ant-form-item{margin-bottom:10px}.dynamic-form-body .ant-form-item-label>label{font-size:13px;color:#555}.dynamic-form-actions{display:flex;gap:8px;margin-top:4px}.dynamic-form-submitted{font-size:12px;color:#888}.dynamic-form-summary-text{font-size:14px;color:#333;line-height:1.8}.dynamic-form-skipped{color:#999}.courseware-header{display:flex;align-items:center;justify-content:space-between;padding:12px 20px;font-weight:500;font-size:15px;flex-shrink:0;border-bottom:1px solid #f0f0f0}.courseware-title{display:flex;align-items:center;gap:4px;overflow:hidden;text-overflow:ellipsis;white-space:nowrap;flex:1}.courseware-actions{display:flex;gap:4px;flex-shrink:0}.courseware-progress-bar{position:relative;height:24px;background:#f5f5f5;flex-shrink:0}.courseware-progress-fill{height:100%;background:linear-gradient(90deg,#d3adf7,#722ed1);transition:width .3s}.courseware-progress-text{position:absolute;top:0;right:0;bottom:0;left:0;display:flex;align-items:center;justify-content:center;font-size:12px;color:#333}.courseware-slides-nav{display:flex;flex-direction:column;gap:6px;padding:10px 8px;overflow-y:auto;flex-shrink:0;width:120px;border-right:1px solid #f0f0f0;background:#fafafa;scrollbar-width:thin;scrollbar-color:transparent transparent}.courseware-slides-nav:hover{scrollbar-color:rgba(0,0,0,.15) transparent}.courseware-slides-nav::-webkit-scrollbar{width:2px}.courseware-slides-nav::-webkit-scrollbar-thumb{background:transparent;border-radius:2px}.courseware-slides-nav:hover::-webkit-scrollbar-thumb{background:#00000026}.courseware-slide-thumb{display:flex;flex-direction:column;align-items:center;gap:2px;padding:6px 4px;border-radius:6px;border:1px solid #e8e8e8;background:#fff;cursor:pointer;font-size:11px;white-space:nowrap;flex-shrink:0;transition:all .2s}.courseware-slide-thumb:hover{border-color:#b37feb}.courseware-slide-thumb.active{border-color:#722ed1;background:#f9f0ff;font-weight:500}.courseware-slide-thumb.regenerating{position:relative;opacity:.7;border-color:#faad14;background:#fffbe6}.courseware-slide-thumb.pending{opacity:.5;pointer-events:none;min-width:60px;justify-content:center}.slide-thumb-number{color:#722ed1;font-weight:600}.slide-thumb-title{max-width:120px;overflow:hidden;display:-webkit-box;-webkit-line-clamp:2;line-clamp:2;-webkit-box-orient:vertical;line-height:1.2;word-break:break-all;white-space:normal}.slide-thumb-layout{color:#999;font-size:10px}.courseware-body{display:flex;flex:1;overflow:hidden}.courseware-body.mobile{flex-direction:column}.courseware-outline{border-bottom:1px solid #f0f0f0;background:#fafafa;max-height:240px;overflow-y:auto;scrollbar-width:thin;scrollbar-color:transparent transparent}.courseware-outline:hover{scrollbar-color:rgba(0,0,0,.15) transparent}.courseware-outline::-webkit-scrollbar{width:4px}.courseware-outline::-webkit-scrollbar-thumb{background:transparent;border-radius:4px;transition:background .3s}.courseware-outline:hover::-webkit-scrollbar-thumb{background:#00000026}.courseware-outline:active::-webkit-scrollbar-thumb{background:#00000040}.courseware-outline-header{display:flex;align-items:center;justify-content:space-between;padding:8px 12px 4px;font-size:13px;font-weight:600;color:#722ed1}.courseware-outline-list{padding:0 8px 8px}.courseware-outline-item{display:flex;align-items:flex-start;gap:8px;padding:6px 8px;border-radius:6px;cursor:pointer;font-size:12px;transition:background .15s}.courseware-outline-item:hover{background:#f0e6ff}.courseware-outline-item.active{background:#f9f0ff;font-weight:500}.outline-item-number{color:#722ed1;font-weight:600;flex-shrink:0;min-width:18px}.outline-item-info{display:flex;flex-direction:column;flex:1;min-width:0}.outline-item-title{font-size:12px;color:#333}.outline-item-desc{font-size:11px;color:#999;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.courseware-slides-nav.mobile{flex-direction:row;width:100%;border-right:none;border-bottom:1px solid #f0f0f0;overflow-x:auto;overflow-y:hidden;padding:8px;gap:8px}.courseware-slides-nav.mobile .courseware-slide-thumb{flex-direction:row;gap:6px;padding:4px 10px;white-space:nowrap;min-width:max-content}.courseware-slide-content{flex:1;overflow-y:auto;padding:24px;scrollbar-width:thin;scrollbar-color:transparent transparent}.courseware-slide-content:hover{scrollbar-color:rgba(0,0,0,.15) transparent}.courseware-slide-content::-webkit-scrollbar{width:4px}.courseware-slide-content::-webkit-scrollbar-thumb{background:transparent;border-radius:4px;transition:background .3s}.courseware-slide-content:hover::-webkit-scrollbar-thumb{background:#00000026}.courseware-slide-content:active::-webkit-scrollbar-thumb{background:#00000040}.courseware-slide-canvas-wrapper{width:100%;position:relative}.courseware-slide-controls{display:flex;align-items:center;justify-content:center;gap:12px;padding:10px 0}.courseware-slide-canvas{background:#fff;border-radius:8px;box-shadow:0 2px 12px #00000014;overflow:hidden;border:1px solid #e8e8e8;position:relative}.courseware-slide-regenerating-overlay{position:absolute;top:0;right:0;bottom:0;left:0;background:#ffffffd9;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:12px;z-index:10;font-size:14px;color:#666}.courseware-slide-header{display:flex;align-items:center;gap:10px;margin-bottom:16px}.courseware-slide-header h2{margin:0;font-size:20px;color:#1a1a1a}.slide-layout-tag{font-size:11px;padding:2px 8px;border-radius:4px;background:#f9f0ff;color:#722ed1;flex-shrink:0}.courseware-slide-image{margin-bottom:16px;text-align:center}.courseware-slide-image img{max-width:100%;max-height:300px;border-radius:8px;border:1px solid #f0f0f0}.courseware-slide-body{width:100%;height:100%;font-size:15px;line-height:1.8;color:#333;overflow:hidden}.courseware-slide-body h1,.courseware-slide-body h2,.courseware-slide-body h3{color:#1a1a1a;margin-top:16px;margin-bottom:8px}.courseware-slide-body ul,.courseware-slide-body ol{padding-left:20px}.courseware-slide-body li{margin-bottom:6px}.courseware-slide-body .katex-display{margin:0}.courseware-slide-body .slide-cover{display:flex;flex-direction:column;align-items:center;justify-content:center;text-align:center;min-height:280px;position:relative;padding:40px 20px}.courseware-slide-body .slide-cover h1{font-size:28px;margin-bottom:8px;z-index:1}.courseware-slide-body .slide-cover .subtitle{font-size:16px;color:#666;z-index:1}.courseware-slide-body .slide-cover .info{font-size:13px;color:#999;margin-top:20px;z-index:1}.courseware-slide-body .slide-bg-image{position:absolute;top:0;right:0;bottom:0;left:0;border-radius:12px;opacity:.15;overflow:hidden}.courseware-slide-body .slide-bg-image img{width:100%;height:100%;object-fit:cover}.courseware-slide-body .slide-cards{display:grid;grid-template-columns:repeat(auto-fit,minmax(200px,1fr));gap:14px;margin-top:12px}.courseware-slide-body .slide-card{background:#f7f8fc;border-radius:10px;padding:16px;border:1px solid #e8e8f4;transition:box-shadow .2s}.courseware-slide-body .slide-card:hover{box-shadow:0 2px 12px #0000000f}.courseware-slide-body .slide-card .card-icon{font-size:22px;display:block;margin-bottom:8px}.courseware-slide-body .slide-card h3{margin:0 0 4px;font-size:15px}.courseware-slide-body .slide-card p{margin:0;font-size:13px;color:#666}.courseware-slide-body .slide-points{display:flex;flex-direction:column;gap:10px;margin-top:12px}.courseware-slide-body .point-item{display:flex;align-items:flex-start;gap:10px;background:linear-gradient(135deg,#f0f5ff,#f8f9ff);border-radius:8px;padding:12px 16px;border-left:3px solid #597ef7}.courseware-slide-body .slide-image-text{display:flex;gap:20px;align-items:flex-start;margin-top:12px}.courseware-slide-body .slide-img-area{flex:0 0 45%;display:flex;flex-direction:column;gap:10px}.courseware-slide-body .slide-img-area img{max-width:100%;height:auto;border-radius:10px}.courseware-slide-body .slide-text-area{flex:1}.courseware-slide-body .slide-two-column{display:grid;grid-template-columns:1fr 1fr;gap:20px;margin-top:12px}.courseware-slide-body .slide-column{background:#fafbfe;border-radius:10px;padding:16px;border:1px solid #ececf4}.courseware-slide-body .slide-column h3{margin-top:0}.courseware-slide-body .slide-column img{max-width:100%;height:auto;border-radius:8px;margin-bottom:8px}.courseware-slide-body .slide-gallery{display:grid;grid-template-columns:repeat(auto-fit,minmax(160px,1fr));gap:14px;margin-top:12px}.courseware-slide-body .slide-gallery-item{text-align:center}.courseware-slide-body .slide-gallery-item img{max-width:100%;height:auto;border-radius:8px}.courseware-slide-body .slide-gallery-item p{margin-top:6px;font-size:13px;color:#666}.courseware-slide-body .slide-summary{display:flex;flex-direction:column;gap:10px;margin-top:12px}.courseware-slide-body .summary-item{display:flex;align-items:flex-start;gap:10px;padding:10px 14px;background:#f5f7fa;border-radius:8px}.courseware-slide-body .summary-item .num{flex-shrink:0;width:26px;height:26px;border-radius:50%;background:linear-gradient(135deg,#7c4dff,#536dfe);color:#fff;display:flex;align-items:center;justify-content:center;font-size:13px;font-weight:600}.courseware-slide-body .slide-image{background:#f0f2f5;border-radius:10px;overflow:hidden;min-height:100px;display:flex;align-items:center;justify-content:center}.courseware-slide-body .slide-image img{max-width:100%;height:auto;border-radius:10px}.courseware-slide-body .slide-aside-image{margin-top:16px;border-radius:10px;overflow:hidden}.courseware-slide-body .slide-aside-image img{max-width:100%;height:auto;border-radius:10px}.courseware-slide-notes{margin-top:20px;padding:12px 16px;background:#fffbe6;border-radius:8px;border:1px solid #ffe58f}.courseware-slide-notes .notes-label{font-weight:500;font-size:13px;margin-bottom:6px;color:#666}.courseware-loading-center{display:flex;flex-direction:column;align-items:center;justify-content:center;height:200px;gap:16px;color:#999}.courseware-footer{display:flex;align-items:center;justify-content:center;gap:16px;padding:12px 20px;border-top:1px solid #f0f0f0;flex-shrink:0;background:#fafafa}.courseware-page-info{font-size:14px;color:#666;min-width:60px;text-align:center}.courseware-present-overlay{position:fixed;top:0;left:0;width:100vw;height:100vh;background:#000;z-index:10000;display:flex;flex-direction:column;align-items:center;justify-content:center;cursor:none}.courseware-present-overlay:hover{cursor:default}.courseware-present-stage{flex:1;display:flex;align-items:center;justify-content:center;width:100%;overflow:hidden;cursor:pointer}.courseware-present-controls{display:flex;align-items:center;justify-content:center;gap:20px;padding:12px 24px;background:#0009;-webkit-backdrop-filter:blur(8px);backdrop-filter:blur(8px);border-radius:12px;position:absolute;bottom:24px;opacity:0;transition:opacity .3s}.courseware-present-overlay:hover .courseware-present-controls{opacity:1}.present-nav-btn{color:#fff!important;font-size:18px!important}.present-nav-btn:disabled{color:#ffffff4d!important}.present-page-info{color:#fff;font-size:16px;min-width:60px;text-align:center}.present-exit-btn{color:#ffffffb3!important;font-size:13px!important;margin-left:12px}.present-exit-btn:hover{color:#fff!important}