@font-face{font-display:block;font-family:KaTeX_AMS;font-style:normal;font-weight:400;src:url(/web-assets/KaTeX_AMS-Regular-BQhdFMY1.woff2) format("woff2"),url(/web-assets/KaTeX_AMS-Regular-DMm9YOAa.woff) format("woff"),url(/web-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(/web-assets/KaTeX_Caligraphic-Bold-Dq_IR9rO.woff2) format("woff2"),url(/web-assets/KaTeX_Caligraphic-Bold-BEiXGLvX.woff) format("woff"),url(/web-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(/web-assets/KaTeX_Caligraphic-Regular-Di6jR-x-.woff2) format("woff2"),url(/web-assets/KaTeX_Caligraphic-Regular-CTRA-rTL.woff) format("woff"),url(/web-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(/web-assets/KaTeX_Fraktur-Bold-CL6g_b3V.woff2) format("woff2"),url(/web-assets/KaTeX_Fraktur-Bold-BsDP51OF.woff) format("woff"),url(/web-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(/web-assets/KaTeX_Fraktur-Regular-CTYiF6lA.woff2) format("woff2"),url(/web-assets/KaTeX_Fraktur-Regular-Dxdc4cR9.woff) format("woff"),url(/web-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(/web-assets/KaTeX_Main-Bold-Cx986IdX.woff2) format("woff2"),url(/web-assets/KaTeX_Main-Bold-Jm3AIy58.woff) format("woff"),url(/web-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(/web-assets/KaTeX_Main-BoldItalic-DxDJ3AOS.woff2) format("woff2"),url(/web-assets/KaTeX_Main-BoldItalic-SpSLRI95.woff) format("woff"),url(/web-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(/web-assets/KaTeX_Main-Italic-NWA7e6Wa.woff2) format("woff2"),url(/web-assets/KaTeX_Main-Italic-BMLOBm91.woff) format("woff"),url(/web-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(/web-assets/KaTeX_Main-Regular-B22Nviop.woff2) format("woff2"),url(/web-assets/KaTeX_Main-Regular-Dr94JaBh.woff) format("woff"),url(/web-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(/web-assets/KaTeX_Math-BoldItalic-CZnvNsCZ.woff2) format("woff2"),url(/web-assets/KaTeX_Math-BoldItalic-iY-2wyZ7.woff) format("woff"),url(/web-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(/web-assets/KaTeX_Math-Italic-t53AETM-.woff2) format("woff2"),url(/web-assets/KaTeX_Math-Italic-DA0__PXp.woff) format("woff"),url(/web-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(/web-assets/KaTeX_SansSerif-Bold-D1sUS0GD.woff2) format("woff2"),url(/web-assets/KaTeX_SansSerif-Bold-DbIhKOiC.woff) format("woff"),url(/web-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(/web-assets/KaTeX_SansSerif-Italic-C3H0VqGB.woff2) format("woff2"),url(/web-assets/KaTeX_SansSerif-Italic-DN2j7dab.woff) format("woff"),url(/web-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(/web-assets/KaTeX_SansSerif-Regular-DDBCnlJ7.woff2) format("woff2"),url(/web-assets/KaTeX_SansSerif-Regular-CS6fqUqJ.woff) format("woff"),url(/web-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(/web-assets/KaTeX_Script-Regular-D3wIWfF6.woff2) format("woff2"),url(/web-assets/KaTeX_Script-Regular-D5yQViql.woff) format("woff"),url(/web-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(/web-assets/KaTeX_Size1-Regular-mCD8mA8B.woff2) format("woff2"),url(/web-assets/KaTeX_Size1-Regular-C195tn64.woff) format("woff"),url(/web-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(/web-assets/KaTeX_Size2-Regular-Dy4dx90m.woff2) format("woff2"),url(/web-assets/KaTeX_Size2-Regular-oD1tc_U0.woff) format("woff"),url(/web-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(/web-assets/KaTeX_Size3-Regular-CTq5MqoE.woff) format("woff"),url(/web-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(/web-assets/KaTeX_Size4-Regular-Dl5lxZxV.woff2) format("woff2"),url(/web-assets/KaTeX_Size4-Regular-BF-4gkZK.woff) format("woff"),url(/web-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(/web-assets/KaTeX_Typewriter-Regular-CO6r4hn1.woff2) format("woff2"),url(/web-assets/KaTeX_Typewriter-Regular-C0xS9mPB.woff) format("woff"),url(/web-assets/KaTeX_Typewriter-Regular-D3Ib7_Hf.ttf) format("truetype")}.katex{font: 1.21em KaTeX_Main,Times New Roman,serif;line-height:1.2;position:relative;text-indent:0;text-rendering:auto}.katex *{-ms-high-contrast-adjust:none!important;border-color:currentColor}.katex .katex-version:after{content:"0.16.47"}.katex .katex-mathml{border:0;-webkit-clip-path:inset(50%);clip-path:inset(50%);height:1px;overflow:hidden;padding:0;position:absolute;width:1px}.katex .katex-html>.newline{display:block}.katex .base{position:relative;white-space:nowrap;width:-webkit-min-content;width:-moz-min-content;width:min-content}.katex .base,.katex .strut{display:inline-block}.katex .textbf{font-weight:700}.katex .textit{font-style:italic}.katex .textrm{font-family:KaTeX_Main}.katex .textsf{font-family:KaTeX_SansSerif}.katex .texttt{font-family:KaTeX_Typewriter}.katex .mathnormal{font-family:KaTeX_Math;font-style:italic}.katex .mathit{font-family:KaTeX_Main;font-style:italic}.katex .mathrm{font-style:normal}.katex .mathbf{font-family:KaTeX_Main;font-weight:700}.katex .boldsymbol{font-family:KaTeX_Math;font-style:italic;font-weight:700}.katex .amsrm,.katex .mathbb,.katex .textbb{font-family:KaTeX_AMS}.katex .mathcal{font-family:KaTeX_Caligraphic}.katex .mathfrak,.katex .textfrak{font-family:KaTeX_Fraktur}.katex .mathboldfrak,.katex .textboldfrak{font-family:KaTeX_Fraktur;font-weight:700}.katex .mathtt{font-family:KaTeX_Typewriter}.katex .mathscr,.katex .textscr{font-family:KaTeX_Script}.katex .mathsf,.katex .textsf{font-family:KaTeX_SansSerif}.katex .mathboldsf,.katex .textboldsf{font-family:KaTeX_SansSerif;font-weight:700}.katex .mathitsf,.katex .mathsfit,.katex .textitsf{font-family:KaTeX_SansSerif;font-style:italic}.katex .mainrm{font-family:KaTeX_Main;font-style:normal}.katex .vlist-t{border-collapse:collapse;display:inline-table;table-layout:fixed}.katex .vlist-r{display:table-row}.katex .vlist{display:table-cell;position:relative;vertical-align:bottom}.katex .vlist>span{display:block;height:0;position:relative}.katex .vlist>span>span{display:inline-block}.katex .vlist>span>.pstrut{overflow:hidden;width:0}.katex .vlist-t2{margin-right:-2px}.katex .vlist-s{display:table-cell;font-size:1px;min-width:2px;vertical-align:bottom;width:2px}.katex .vbox{align-items:baseline;display:inline-flex;flex-direction:column}.katex .hbox{width:100%}.katex .hbox,.katex .thinbox{display:inline-flex;flex-direction:row}.katex .thinbox{max-width:0;width:0}.katex .msupsub{text-align:left}.katex .mfrac>span>span{text-align:center}.katex .mfrac .frac-line{border-bottom-style:solid;display:inline-block;width:100%}.katex .hdashline,.katex .hline,.katex .mfrac .frac-line,.katex .overline .overline-line,.katex .rule,.katex .underline .underline-line{min-height:1px}.katex .mspace{display:inline-block}.katex .smash{display:inline;line-height:0}.katex .clap,.katex .llap,.katex .rlap{position:relative;width:0}.katex .clap>.inner,.katex .llap>.inner,.katex .rlap>.inner{position:absolute}.katex .clap>.fix,.katex .llap>.fix,.katex .rlap>.fix{display:inline-block}.katex .llap>.inner{right:0}.katex .clap>.inner,.katex .rlap>.inner{left:0}.katex .clap>.inner>span{margin-left:-50%;margin-right:50%}.katex .rule{border:0 solid;display:inline-block;position:relative}.katex .hline,.katex .overline .overline-line,.katex .underline .underline-line{border-bottom-style:solid;display:inline-block;width:100%}.katex .hdashline{border-bottom-style:dashed;display:inline-block;width:100%}.katex .sqrt>.root{margin-left:.2777777778em;margin-right:-.5555555556em}.katex .fontsize-ensurer.reset-size1.size1,.katex .sizing.reset-size1.size1{font-size:1em}.katex .fontsize-ensurer.reset-size1.size2,.katex .sizing.reset-size1.size2{font-size:1.2em}.katex .fontsize-ensurer.reset-size1.size3,.katex .sizing.reset-size1.size3{font-size:1.4em}.katex .fontsize-ensurer.reset-size1.size4,.katex .sizing.reset-size1.size4{font-size:1.6em}.katex .fontsize-ensurer.reset-size1.size5,.katex .sizing.reset-size1.size5{font-size:1.8em}.katex .fontsize-ensurer.reset-size1.size6,.katex .sizing.reset-size1.size6{font-size:2em}.katex .fontsize-ensurer.reset-size1.size7,.katex .sizing.reset-size1.size7{font-size:2.4em}.katex .fontsize-ensurer.reset-size1.size8,.katex .sizing.reset-size1.size8{font-size:2.88em}.katex .fontsize-ensurer.reset-size1.size9,.katex .sizing.reset-size1.size9{font-size:3.456em}.katex .fontsize-ensurer.reset-size1.size10,.katex .sizing.reset-size1.size10{font-size:4.148em}.katex .fontsize-ensurer.reset-size1.size11,.katex .sizing.reset-size1.size11{font-size:4.976em}.katex .fontsize-ensurer.reset-size2.size1,.katex .sizing.reset-size2.size1{font-size:.8333333333em}.katex .fontsize-ensurer.reset-size2.size2,.katex .sizing.reset-size2.size2{font-size:1em}.katex .fontsize-ensurer.reset-size2.size3,.katex .sizing.reset-size2.size3{font-size:1.1666666667em}.katex .fontsize-ensurer.reset-size2.size4,.katex .sizing.reset-size2.size4{font-size:1.3333333333em}.katex .fontsize-ensurer.reset-size2.size5,.katex .sizing.reset-size2.size5{font-size:1.5em}.katex .fontsize-ensurer.reset-size2.size6,.katex .sizing.reset-size2.size6{font-size:1.6666666667em}.katex .fontsize-ensurer.reset-size2.size7,.katex .sizing.reset-size2.size7{font-size:2em}.katex .fontsize-ensurer.reset-size2.size8,.katex .sizing.reset-size2.size8{font-size:2.4em}.katex .fontsize-ensurer.reset-size2.size9,.katex .sizing.reset-size2.size9{font-size:2.88em}.katex .fontsize-ensurer.reset-size2.size10,.katex .sizing.reset-size2.size10{font-size:3.4566666667em}.katex .fontsize-ensurer.reset-size2.size11,.katex .sizing.reset-size2.size11{font-size:4.1466666667em}.katex .fontsize-ensurer.reset-size3.size1,.katex .sizing.reset-size3.size1{font-size:.7142857143em}.katex .fontsize-ensurer.reset-size3.size2,.katex .sizing.reset-size3.size2{font-size:.8571428571em}.katex .fontsize-ensurer.reset-size3.size3,.katex .sizing.reset-size3.size3{font-size:1em}.katex .fontsize-ensurer.reset-size3.size4,.katex .sizing.reset-size3.size4{font-size:1.1428571429em}.katex .fontsize-ensurer.reset-size3.size5,.katex .sizing.reset-size3.size5{font-size:1.2857142857em}.katex .fontsize-ensurer.reset-size3.size6,.katex .sizing.reset-size3.size6{font-size:1.4285714286em}.katex .fontsize-ensurer.reset-size3.size7,.katex .sizing.reset-size3.size7{font-size:1.7142857143em}.katex .fontsize-ensurer.reset-size3.size8,.katex .sizing.reset-size3.size8{font-size:2.0571428571em}.katex .fontsize-ensurer.reset-size3.size9,.katex .sizing.reset-size3.size9{font-size:2.4685714286em}.katex .fontsize-ensurer.reset-size3.size10,.katex .sizing.reset-size3.size10{font-size:2.9628571429em}.katex .fontsize-ensurer.reset-size3.size11,.katex .sizing.reset-size3.size11{font-size:3.5542857143em}.katex .fontsize-ensurer.reset-size4.size1,.katex .sizing.reset-size4.size1{font-size:.625em}.katex .fontsize-ensurer.reset-size4.size2,.katex .sizing.reset-size4.size2{font-size:.75em}.katex .fontsize-ensurer.reset-size4.size3,.katex .sizing.reset-size4.size3{font-size:.875em}.katex .fontsize-ensurer.reset-size4.size4,.katex .sizing.reset-size4.size4{font-size:1em}.katex .fontsize-ensurer.reset-size4.size5,.katex .sizing.reset-size4.size5{font-size:1.125em}.katex .fontsize-ensurer.reset-size4.size6,.katex .sizing.reset-size4.size6{font-size:1.25em}.katex .fontsize-ensurer.reset-size4.size7,.katex .sizing.reset-size4.size7{font-size:1.5em}.katex .fontsize-ensurer.reset-size4.size8,.katex .sizing.reset-size4.size8{font-size:1.8em}.katex .fontsize-ensurer.reset-size4.size9,.katex .sizing.reset-size4.size9{font-size:2.16em}.katex .fontsize-ensurer.reset-size4.size10,.katex .sizing.reset-size4.size10{font-size:2.5925em}.katex .fontsize-ensurer.reset-size4.size11,.katex .sizing.reset-size4.size11{font-size:3.11em}.katex .fontsize-ensurer.reset-size5.size1,.katex .sizing.reset-size5.size1{font-size:.5555555556em}.katex .fontsize-ensurer.reset-size5.size2,.katex .sizing.reset-size5.size2{font-size:.6666666667em}.katex .fontsize-ensurer.reset-size5.size3,.katex .sizing.reset-size5.size3{font-size:.7777777778em}.katex .fontsize-ensurer.reset-size5.size4,.katex .sizing.reset-size5.size4{font-size:.8888888889em}.katex .fontsize-ensurer.reset-size5.size5,.katex .sizing.reset-size5.size5{font-size:1em}.katex .fontsize-ensurer.reset-size5.size6,.katex .sizing.reset-size5.size6{font-size:1.1111111111em}.katex .fontsize-ensurer.reset-size5.size7,.katex .sizing.reset-size5.size7{font-size:1.3333333333em}.katex .fontsize-ensurer.reset-size5.size8,.katex .sizing.reset-size5.size8{font-size:1.6em}.katex .fontsize-ensurer.reset-size5.size9,.katex .sizing.reset-size5.size9{font-size:1.92em}.katex .fontsize-ensurer.reset-size5.size10,.katex .sizing.reset-size5.size10{font-size:2.3044444444em}.katex .fontsize-ensurer.reset-size5.size11,.katex .sizing.reset-size5.size11{font-size:2.7644444444em}.katex .fontsize-ensurer.reset-size6.size1,.katex .sizing.reset-size6.size1{font-size:.5em}.katex .fontsize-ensurer.reset-size6.size2,.katex .sizing.reset-size6.size2{font-size:.6em}.katex .fontsize-ensurer.reset-size6.size3,.katex .sizing.reset-size6.size3{font-size:.7em}.katex .fontsize-ensurer.reset-size6.size4,.katex .sizing.reset-size6.size4{font-size:.8em}.katex .fontsize-ensurer.reset-size6.size5,.katex .sizing.reset-size6.size5{font-size:.9em}.katex .fontsize-ensurer.reset-size6.size6,.katex .sizing.reset-size6.size6{font-size:1em}.katex .fontsize-ensurer.reset-size6.size7,.katex .sizing.reset-size6.size7{font-size:1.2em}.katex .fontsize-ensurer.reset-size6.size8,.katex .sizing.reset-size6.size8{font-size:1.44em}.katex .fontsize-ensurer.reset-size6.size9,.katex .sizing.reset-size6.size9{font-size:1.728em}.katex .fontsize-ensurer.reset-size6.size10,.katex .sizing.reset-size6.size10{font-size:2.074em}.katex .fontsize-ensurer.reset-size6.size11,.katex .sizing.reset-size6.size11{font-size:2.488em}.katex .fontsize-ensurer.reset-size7.size1,.katex .sizing.reset-size7.size1{font-size:.4166666667em}.katex .fontsize-ensurer.reset-size7.size2,.katex .sizing.reset-size7.size2{font-size:.5em}.katex .fontsize-ensurer.reset-size7.size3,.katex .sizing.reset-size7.size3{font-size:.5833333333em}.katex .fontsize-ensurer.reset-size7.size4,.katex .sizing.reset-size7.size4{font-size:.6666666667em}.katex .fontsize-ensurer.reset-size7.size5,.katex .sizing.reset-size7.size5{font-size:.75em}.katex .fontsize-ensurer.reset-size7.size6,.katex .sizing.reset-size7.size6{font-size:.8333333333em}.katex .fontsize-ensurer.reset-size7.size7,.katex .sizing.reset-size7.size7{font-size:1em}.katex .fontsize-ensurer.reset-size7.size8,.katex .sizing.reset-size7.size8{font-size:1.2em}.katex .fontsize-ensurer.reset-size7.size9,.katex .sizing.reset-size7.size9{font-size:1.44em}.katex .fontsize-ensurer.reset-size7.size10,.katex .sizing.reset-size7.size10{font-size:1.7283333333em}.katex .fontsize-ensurer.reset-size7.size11,.katex .sizing.reset-size7.size11{font-size:2.0733333333em}.katex .fontsize-ensurer.reset-size8.size1,.katex .sizing.reset-size8.size1{font-size:.3472222222em}.katex .fontsize-ensurer.reset-size8.size2,.katex .sizing.reset-size8.size2{font-size:.4166666667em}.katex .fontsize-ensurer.reset-size8.size3,.katex .sizing.reset-size8.size3{font-size:.4861111111em}.katex .fontsize-ensurer.reset-size8.size4,.katex .sizing.reset-size8.size4{font-size:.5555555556em}.katex .fontsize-ensurer.reset-size8.size5,.katex .sizing.reset-size8.size5{font-size:.625em}.katex .fontsize-ensurer.reset-size8.size6,.katex .sizing.reset-size8.size6{font-size:.6944444444em}.katex .fontsize-ensurer.reset-size8.size7,.katex .sizing.reset-size8.size7{font-size:.8333333333em}.katex .fontsize-ensurer.reset-size8.size8,.katex .sizing.reset-size8.size8{font-size:1em}.katex .fontsize-ensurer.reset-size8.size9,.katex .sizing.reset-size8.size9{font-size:1.2em}.katex .fontsize-ensurer.reset-size8.size10,.katex .sizing.reset-size8.size10{font-size:1.4402777778em}.katex .fontsize-ensurer.reset-size8.size11,.katex .sizing.reset-size8.size11{font-size:1.7277777778em}.katex .fontsize-ensurer.reset-size9.size1,.katex .sizing.reset-size9.size1{font-size:.2893518519em}.katex .fontsize-ensurer.reset-size9.size2,.katex .sizing.reset-size9.size2{font-size:.3472222222em}.katex .fontsize-ensurer.reset-size9.size3,.katex .sizing.reset-size9.size3{font-size:.4050925926em}.katex .fontsize-ensurer.reset-size9.size4,.katex .sizing.reset-size9.size4{font-size:.462962963em}.katex .fontsize-ensurer.reset-size9.size5,.katex .sizing.reset-size9.size5{font-size:.5208333333em}.katex .fontsize-ensurer.reset-size9.size6,.katex .sizing.reset-size9.size6{font-size:.5787037037em}.katex .fontsize-ensurer.reset-size9.size7,.katex .sizing.reset-size9.size7{font-size:.6944444444em}.katex .fontsize-ensurer.reset-size9.size8,.katex .sizing.reset-size9.size8{font-size:.8333333333em}.katex .fontsize-ensurer.reset-size9.size9,.katex .sizing.reset-size9.size9{font-size:1em}.katex .fontsize-ensurer.reset-size9.size10,.katex .sizing.reset-size9.size10{font-size:1.2002314815em}.katex .fontsize-ensurer.reset-size9.size11,.katex .sizing.reset-size9.size11{font-size:1.4398148148em}.katex .fontsize-ensurer.reset-size10.size1,.katex .sizing.reset-size10.size1{font-size:.2410800386em}.katex .fontsize-ensurer.reset-size10.size2,.katex .sizing.reset-size10.size2{font-size:.2892960463em}.katex .fontsize-ensurer.reset-size10.size3,.katex .sizing.reset-size10.size3{font-size:.337512054em}.katex .fontsize-ensurer.reset-size10.size4,.katex .sizing.reset-size10.size4{font-size:.3857280617em}.katex .fontsize-ensurer.reset-size10.size5,.katex .sizing.reset-size10.size5{font-size:.4339440694em}.katex .fontsize-ensurer.reset-size10.size6,.katex .sizing.reset-size10.size6{font-size:.4821600771em}.katex .fontsize-ensurer.reset-size10.size7,.katex .sizing.reset-size10.size7{font-size:.5785920926em}.katex .fontsize-ensurer.reset-size10.size8,.katex .sizing.reset-size10.size8{font-size:.6943105111em}.katex .fontsize-ensurer.reset-size10.size9,.katex .sizing.reset-size10.size9{font-size:.8331726133em}.katex .fontsize-ensurer.reset-size10.size10,.katex .sizing.reset-size10.size10{font-size:1em}.katex .fontsize-ensurer.reset-size10.size11,.katex .sizing.reset-size10.size11{font-size:1.1996142719em}.katex .fontsize-ensurer.reset-size11.size1,.katex .sizing.reset-size11.size1{font-size:.2009646302em}.katex .fontsize-ensurer.reset-size11.size2,.katex .sizing.reset-size11.size2{font-size:.2411575563em}.katex .fontsize-ensurer.reset-size11.size3,.katex .sizing.reset-size11.size3{font-size:.2813504823em}.katex .fontsize-ensurer.reset-size11.size4,.katex .sizing.reset-size11.size4{font-size:.3215434084em}.katex .fontsize-ensurer.reset-size11.size5,.katex .sizing.reset-size11.size5{font-size:.3617363344em}.katex .fontsize-ensurer.reset-size11.size6,.katex .sizing.reset-size11.size6{font-size:.4019292605em}.katex .fontsize-ensurer.reset-size11.size7,.katex .sizing.reset-size11.size7{font-size:.4823151125em}.katex .fontsize-ensurer.reset-size11.size8,.katex .sizing.reset-size11.size8{font-size:.578778135em}.katex .fontsize-ensurer.reset-size11.size9,.katex .sizing.reset-size11.size9{font-size:.6945337621em}.katex .fontsize-ensurer.reset-size11.size10,.katex .sizing.reset-size11.size10{font-size:.8336012862em}.katex .fontsize-ensurer.reset-size11.size11,.katex .sizing.reset-size11.size11{font-size:1em}.katex .delimsizing.size1{font-family:KaTeX_Size1}.katex .delimsizing.size2{font-family:KaTeX_Size2}.katex .delimsizing.size3{font-family:KaTeX_Size3}.katex .delimsizing.size4{font-family:KaTeX_Size4}.katex .delimsizing.mult .delim-size1>span{font-family:KaTeX_Size1}.katex .delimsizing.mult .delim-size4>span{font-family:KaTeX_Size4}.katex .nulldelimiter{display:inline-block;width:.12em}.katex .delimcenter,.katex .op-symbol{position:relative}.katex .op-symbol.small-op{font-family:KaTeX_Size1}.katex .op-symbol.large-op{font-family:KaTeX_Size2}.katex .accent>.vlist-t,.katex .op-limits>.vlist-t{text-align:center}.katex .accent .accent-body{position:relative}.katex .accent .accent-body:not(.accent-full){width:0}.katex .overlay{display:block}.katex .mtable .vertical-separator{display:inline-block;min-width:1px}.katex .mtable .arraycolsep{display:inline-block}.katex .mtable .col-align-c>.vlist-t{text-align:center}.katex .mtable .col-align-l>.vlist-t{text-align:left}.katex .mtable .col-align-r>.vlist-t{text-align:right}.katex .svg-align{text-align:left}.katex svg{fill:currentColor;stroke:currentColor;display:block;height:inherit;position:absolute;width:100%}.katex svg path{stroke:none}.katex svg{fill-rule:nonzero;fill-opacity:1;stroke-width:1;stroke-linecap:butt;stroke-linejoin:miter;stroke-miterlimit:4;stroke-dasharray:none;stroke-dashoffset:0;stroke-opacity:1}.katex img{border-style:none;max-height:none;max-width:none;min-height:0;min-width:0}.katex .stretchy{display:block;overflow:hidden;position:relative;width:100%}.katex .stretchy:after,.katex .stretchy:before{content:""}.katex .hide-tail{overflow:hidden;position:relative;width:100%}.katex .halfarrow-left{left:0;overflow:hidden;position:absolute;width:50.2%}.katex .halfarrow-right{overflow:hidden;position:absolute;right:0;width:50.2%}.katex .brace-left{left:0;overflow:hidden;position:absolute;width:25.1%}.katex .brace-center{left:25%;overflow:hidden;position:absolute;width:50%}.katex .brace-right{overflow:hidden;position:absolute;right:0;width:25.1%}.katex .x-arrow-pad{padding:0 .5em}.katex .cd-arrow-pad{padding:0 .55556em 0 .27778em}.katex .mover,.katex .munder,.katex .x-arrow{text-align:center}.katex .boxpad{padding:0 .3em}.katex .fbox,.katex .fcolorbox{border:.04em solid;box-sizing:border-box}.katex .cancel-pad{padding:0 .2em}.katex .cancel-lap{margin-left:-.2em;margin-right:-.2em}.katex .sout{border-bottom-style:solid;border-bottom-width:.08em}.katex .angl{border-right:.049em solid;border-top:.049em solid;box-sizing:border-box;margin-right:.03889em}.katex .anglpad{padding:0 .03889em}.katex .eqn-num:before{content:"(" counter(katexEqnNo) ")";counter-increment:katexEqnNo}.katex .mml-eqn-num:before{content:"(" counter(mmlEqnNo) ")";counter-increment:mmlEqnNo}.katex .mtr-glue{width:50%}.katex .cd-vert-arrow{display:inline-block;position:relative}.katex .cd-label-left{display:inline-block;position:absolute;right:calc(50% + .3em);text-align:left}.katex .cd-label-right{display:inline-block;left:calc(50% + .3em);position:absolute;text-align:right}.katex-display{display:block;margin:1em 0;text-align:center}.katex-display>.katex{display:block;text-align:center;white-space:nowrap}.katex-display>.katex>.katex-html{display:block;position:relative}.katex-display>.katex>.katex-html>.tag{position:absolute;right:0}.katex-display.leqno>.katex>.katex-html>.tag{left:0;right:auto}.katex-display.fleqn>.katex{padding-left:2em;text-align:left}body{counter-reset:katexEqnNo mmlEqnNo}:root{font-family:Inter,Segoe UI,Microsoft YaHei,system-ui,sans-serif;color:#202837;background:#f5f7fb;font-synthesis:none;--primary: #3157c8;--primary-dark: #2445a5;--border: #dfe4ec;--muted: #657084;--green: #18784c;--green-bg: #edf9f2;--red: #b82f3e;--red-bg: #fff1f2}*{box-sizing:border-box}body{margin:0;min-width:320px;min-height:100vh;line-height:1.65}button,select{font:inherit}button,a{-webkit-tap-highlight-color:transparent}a{color:inherit}.app-header{height:62px;border-bottom:1px solid var(--border);background:#fffffff5;position:sticky;top:0;z-index:30}.header-inner{max-width:1220px;height:100%;margin:auto;padding:0 24px;display:flex;align-items:center;justify-content:space-between}.brand{display:flex;align-items:center;gap:10px;text-decoration:none;font-weight:750}.brand-mark{width:34px;height:34px;display:grid;place-items:center;color:#fff;background:var(--primary);border-radius:8px;font-size:12px;letter-spacing:.5px}nav{display:flex;gap:8px}nav a{text-decoration:none;padding:7px 13px;border-radius:7px;color:#4d586c;font-weight:600}nav a:hover,nav a.router-link-active{color:var(--primary);background:#eef2ff}.page-shell{max-width:1220px;width:100%;flex:1;margin:0 auto;padding:48px 24px 72px}#app{display:flex;flex-direction:column;min-height:100vh}.app-footer{margin-top:auto;border-top:1px solid var(--border);background:#fff}.footer-inner{max-width:1220px;margin:auto;padding:14px 24px;display:flex;justify-content:space-between;align-items:center;gap:12px;flex-wrap:wrap;color:var(--muted);font-size:13px}.footer-note{opacity:.9}.footer-icp{text-decoration:none;color:var(--muted)}.footer-icp:hover{color:var(--primary);text-decoration:underline}.home-hero{max-width:760px;margin:25px auto 38px;text-align:center}.home-hero h1{font-size:clamp(34px,5vw,50px);line-height:1.15;margin:6px 0 14px;letter-spacing:-.04em}.home-hero>p:last-child{color:var(--muted);font-size:18px}.eyebrow{margin:0;text-transform:uppercase;letter-spacing:.12em;font-size:13px;font-weight:800;color:var(--primary)}.mode-grid{max-width:900px;margin:auto;display:grid;grid-template-columns:repeat(2,1fr);gap:22px}.mode-card{min-height:280px;padding:32px;display:flex;flex-direction:column;align-items:flex-start;border:1px solid var(--border);border-radius:14px;background:#fff;text-decoration:none;box-shadow:0 8px 30px #1e2f500d;transition:transform .15s,border-color .15s}.mode-card:hover{transform:translateY(-2px);border-color:#9aabe2}.mode-card h2{margin:20px 0 5px;font-size:25px}.mode-card p{color:var(--muted);flex:1;margin:0 0 24px}.mode-icon{width:48px;height:48px;display:grid;place-items:center;border-radius:10px;background:#eef2ff;color:var(--primary);font-weight:800;font-size:19px}.simple-stats{max-width:900px;margin:28px auto;display:flex;justify-content:center;gap:32px;color:var(--muted);font-size:14px}.simple-stats strong{color:#26334a}.button{display:inline-flex;min-height:42px;align-items:center;justify-content:center;padding:9px 20px;border:1px solid transparent;border-radius:8px;cursor:pointer;text-decoration:none;font-weight:700;transition:background .15s}.button:disabled{opacity:.5;cursor:not-allowed}.button.primary{background:var(--primary);color:#fff}.button.primary:hover:not(:disabled){background:var(--primary-dark)}.button.secondary{border-color:var(--border);background:#fff;color:#38445a}.button.secondary:hover:not(:disabled){background:#f2f4f8}.button.danger{color:#fff;background:#b82f3e}.button.large{min-height:48px}.button.full{width:100%}.text-link,.text-button{border:0;background:transparent;color:var(--primary);font-weight:650;cursor:pointer;text-decoration:none}.config-page{max-width:760px;margin:auto}.page-heading{margin-bottom:25px}.page-heading h1{margin:4px 0;font-size:32px}.page-heading>p:last-child{color:var(--muted);margin:0}.config-card{padding:30px;border:1px solid var(--border);background:#fff;border-radius:13px;display:grid;gap:22px}.config-card label{display:grid;gap:7px;font-weight:700}.config-card select{width:100%;min-height:44px;padding:8px 12px;background:#fff;color:#28344a;border:1px solid #cbd2df;border-radius:8px}.config-card fieldset{border:0;padding:0;margin:0}.config-card legend{margin-bottom:8px;font-weight:700}.check-choice{min-width:100px;padding:10px 14px;margin-right:10px;border:1px solid var(--border);border-radius:8px;background:#fff;cursor:pointer}.check-choice span{display:inline-grid;place-items:center;width:19px;height:19px;margin-right:7px;border:1px solid #adb7c8;border-radius:4px;color:#fff}.check-choice.selected{border-color:var(--primary);background:#f0f3ff;color:var(--primary)}.check-choice.selected span{background:var(--primary);border-color:var(--primary)}.field-error{color:var(--red);margin:-12px 0 0}.field-hint{margin:-2px 0 10px;color:var(--muted);font-size:14px}.bank-choice-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(220px,1fr));gap:9px}.bank-choice-grid .bank-choice{display:flex;align-items:center;min-width:0;margin:0;text-align:left}.bank-choice-grid .bank-choice>span:first-child{flex:0 0 19px}.bank-choice-grid .bank-choice-label{display:flex;width:auto;height:auto;margin:0;border:0;color:inherit;flex:1;align-items:center;justify-content:space-between;gap:8px}.bank-choice-label small{color:var(--muted);white-space:nowrap;font-weight:500}.check-choice.selected .bank-choice-label{background:transparent;border:0}.selection-summary{margin:10px 0 0;color:var(--primary);font-size:14px;font-weight:700}.preset-summary{border:1px solid var(--border);background:#f9fafc;border-radius:10px;padding:18px}.preset-summary h2{margin:0 0 12px;font-size:18px}.preset-summary dl{margin:0;display:grid;grid-template-columns:repeat(5,1fr);gap:10px}.preset-summary dl div{display:grid}.preset-summary dt{color:var(--muted);font-size:13px}.preset-summary dd{margin:0;font-size:20px;font-weight:750}.practice-page,.review-page{max-width:930px;margin:auto}.session-heading{display:flex;justify-content:space-between;align-items:end;margin-bottom:18px}.session-heading h1{margin:3px 0 0;font-size:27px}.practice-stats,.question-history{display:flex;align-items:center;flex-wrap:wrap;gap:12px;margin-bottom:12px;padding:9px 16px;border:1px solid var(--border);border-radius:10px;background:#f7f9ff;font-size:14px;color:var(--muted)}.practice-stats .stats-label,.question-history .stats-label{font-weight:750;color:var(--primary);letter-spacing:.04em}.practice-stats .stats-score,.question-history strong{font-variant-numeric:tabular-nums}.practice-stats .stats-score strong{font-size:16px;color:#151c28}.practice-stats .stats-rate,.question-history .stats-rate{margin-left:auto;font-weight:700;color:#151c28;font-variant-numeric:tabular-nums}.question-history{background:#fff}.question-history strong{color:#151c28}.question-card{padding:clamp(22px,4vw,38px);border:1px solid var(--border);border-radius:13px;background:#fff;box-shadow:0 6px 24px #1e2f500a}.question-meta{display:flex;align-items:center;gap:8px;min-height:28px;color:var(--muted);font-size:13px}.type-badge{padding:2px 9px;border-radius:999px;color:var(--primary);background:#eef2ff;font-weight:750}.question-label{margin:16px 0 6px;font-size:19px}.question-stem{margin:16px 0 24px;font-size:18px;line-height:1.75;color:#151c28}.question-images{display:flex;flex-wrap:wrap;gap:12px;justify-content:center;margin:18px 0 25px}.question-image-button{max-width:100%;padding:0;border:0;background:transparent;cursor:zoom-in}.question-image{display:block;max-width:100%;height:auto;object-fit:contain}.image-error{padding:18px;color:var(--red);background:var(--red-bg);border-radius:8px}.image-lightbox{position:fixed;inset:0;padding:56px 25px 25px;z-index:100;display:grid;place-items:center;background:#0a0f19db}.image-lightbox img{max-width:96vw;max-height:90vh;object-fit:contain}.lightbox-close{position:absolute;right:22px;top:14px;color:#fff;background:transparent;border:0;font-size:36px;cursor:pointer}.option-list{display:grid;gap:12px}.option-row{width:100%;min-height:52px;display:flex;align-items:flex-start;gap:8px;padding:13px 16px;text-align:left;border:1px solid #d5dae4;border-radius:9px;background:#fff;color:#253046;cursor:pointer}.option-row:hover:not(:disabled){border-color:#91a4de;background:#f8f9ff}.option-row.selected{border-color:var(--primary);background:#eef2ff}.option-row.locked{cursor:default;opacity:1}.option-control{width:21px;height:21px;flex:0 0 21px;display:grid;place-items:center;margin-top:2px;border:1.5px solid #9aa5b7;border-radius:50%;font-size:10px;color:#fff}.option-list.multiple_choice .option-control{border-radius:4px}.question-card:has(.option-row) .option-row.selected .option-control{background:var(--primary);border-color:var(--primary)}.option-key{flex:0 0 auto;font-weight:750}.option-content{min-width:0;flex:1}.option-content .rich-text{display:inline}.option-content .question-image-button{display:block;margin-top:10px}.question-actions{display:flex;justify-content:flex-end;margin:18px 0 28px}.answer-status,.explanation-panel{margin-top:18px;border:1px solid var(--border);border-radius:12px;background:#fff;padding:24px}.answer-status h2{margin:0 0 12px;font-size:20px}.answer-status.correct{border-left:5px solid var(--green);background:var(--green-bg)}.answer-status.correct h2{color:var(--green)}.answer-status.incorrect{border-left:5px solid var(--red);background:var(--red-bg)}.answer-status.incorrect h2{color:var(--red)}.answer-status dl{margin:0;display:grid;gap:6px}.answer-status dl div{display:flex;gap:12px}.answer-status dt{min-width:115px;color:var(--muted)}.answer-status dd{margin:0;font-weight:700}.answer-status.disputed{border:2px solid #e0a800;border-left-width:7px;background:#fff3b8;box-shadow:0 0 0 3px #e0a8001f}.answer-status.disputed h2{color:#6f4d00}.dispute-warning{margin:0 0 14px;padding:11px 13px;border-radius:8px;background:#ffe477;color:#5b4000;line-height:1.55}.dispute-summary{margin:20px 0 0;font-weight:700}.explanation-panel{line-height:1.75}.explanation-panel>header{display:flex;justify-content:space-between;align-items:center;border-bottom:1px solid var(--border);padding-bottom:13px}.explanation-panel h2{margin:0;font-size:21px}.explanation-panel h3{margin:22px 0 5px;font-size:17px}.source-badge{background:#f0f2f6;color:#59657a;font-size:13px;padding:3px 9px;border-radius:99px}.analysis-row{display:flex;align-items:baseline;gap:4px}.analysis-row .rich-text{flex:1}.rich-text{overflow-wrap:anywhere}.option-content .katex,.explanation-panel .katex,.dispute-warning .katex{font-size:1.05em}.formula-fallback{color:#9a3340}.katex-display{max-width:100%;overflow-x:auto;overflow-y:hidden;padding:4px 0}.loading-state{min-height:180px;display:flex;align-items:center;justify-content:center;gap:10px;color:var(--muted)}.spinner{width:20px;height:20px;border:2px solid #dce1ea;border-top-color:var(--primary);border-radius:50%;animation:spin .7s linear infinite}@keyframes spin{to{transform:rotate(360deg)}}.notice{padding:12px 15px;border-radius:8px;background:#fff7df;color:#754f00}.notice-error{display:flex;justify-content:space-between;align-items:center;margin:12px 0;background:var(--red-bg);color:var(--red)}.empty-state{color:var(--muted)}.empty-card{text-align:center;padding:60px 20px;background:#fff;border:1px solid var(--border);border-radius:12px}.exam-page{max-width:1180px;margin:auto}.exam-topbar{min-height:62px;margin-bottom:18px;padding:10px 18px;display:flex;align-items:center;justify-content:space-between;gap:15px;background:#202b42;color:#fff;border-radius:10px;position:sticky;top:74px;z-index:20;box-shadow:0 6px 20px #1b263d1f}.exam-topbar>div:first-child{display:flex;gap:18px;align-items:baseline}.exam-topbar span{color:#dce3f4}.saving-state{margin-left:auto;font-size:13px}.exam-timer{display:flex;align-items:baseline;gap:10px}.exam-timer strong{font-variant-numeric:tabular-nums;font-size:20px;letter-spacing:.04em}.exam-timer.warning strong{color:#ffd26e}.exam-timer.urgent strong{color:#ff8792}.exam-layout{display:grid;grid-template-columns:minmax(0,1fr) 280px;gap:20px;align-items:start}.desktop-sheet{position:sticky;top:154px}.answer-sheet{padding:20px;background:#fff;border:1px solid var(--border);border-radius:12px}.answer-sheet h2{margin:0 0 14px;font-size:19px}.answer-grid{display:grid;grid-template-columns:repeat(5,1fr);gap:7px}.answer-grid button{aspect-ratio:1;border:1px solid #cbd2df;border-radius:6px;background:#fff;color:#3c475b;cursor:pointer}.answer-grid button.answered{border-color:#9aaee8;background:#e8edff;color:#2546a6;font-weight:700}.answer-grid button.current{outline:2px solid var(--primary);outline-offset:1px}.answer-legend{margin:15px 0;display:flex;flex-wrap:wrap;gap:10px;font-size:12px;color:var(--muted)}.answer-legend span{display:flex;align-items:center;gap:4px}.answer-legend i{width:12px;height:12px;border:1px solid #cbd2df;border-radius:3px;background:#fff}.answer-legend .legend-current{border:2px solid var(--primary)}.answer-legend .legend-answered{border-color:#9aaee8;background:#e8edff}.exam-nav{display:flex;justify-content:space-between;gap:12px;margin-top:18px}.mobile-sheet-button,.mobile-sheet-backdrop{display:none}.dialog-backdrop,.mobile-sheet-backdrop{position:fixed;inset:0;z-index:80;background:#0f16248c}.dialog-backdrop{display:grid;place-items:center;padding:20px}.dialog{width:min(440px,100%);background:#fff;border-radius:12px;padding:25px;box-shadow:0 20px 60px #0003}.dialog h2{margin:0 0 7px}.dialog p{color:var(--muted)}.dialog-actions{display:flex;justify-content:flex-end;gap:10px;margin-top:22px}.result-page{max-width:760px;margin:auto}.result-card{text-align:center;padding:clamp(28px,6vw,54px);border:1px solid var(--border);border-radius:14px;background:#fff}.score{display:flex;align-items:baseline;justify-content:center;margin:12px 0 26px}.score strong{font-size:clamp(64px,11vw,92px);line-height:1;color:var(--primary);letter-spacing:-.06em}.score span{color:var(--muted);font-size:20px}.result-stats{display:grid;grid-template-columns:repeat(4,1fr);gap:10px;padding:18px 0;border-block:1px solid var(--border)}.result-stats span{display:grid;color:var(--muted);font-size:13px}.result-stats strong{color:#26334a;font-size:22px}.breakdown{margin:22px 0}.breakdown div{display:flex;justify-content:space-between;max-width:350px;margin:8px auto}.perfect-message{color:var(--green);font-weight:700}.result-actions{display:flex;align-items:center;justify-content:center;flex-wrap:wrap;gap:12px;margin-top:28px}@media(max-width:760px){.app-header{height:56px}.header-inner{padding:0 15px}.brand-mark{width:31px;height:31px}.brand span:last-child{display:none}nav a{padding:6px 9px;font-size:14px}.page-shell{padding:28px 14px 90px}.mode-grid{grid-template-columns:1fr}.mode-card{min-height:230px;padding:24px}.simple-stats{align-items:center;flex-direction:column;gap:5px}.config-card{padding:20px}.check-choice{min-width:0;padding:9px 11px}.preset-summary dl{grid-template-columns:repeat(2,1fr)}.question-card{padding:20px 16px}.question-stem{font-size:17px}.session-heading{align-items:center}.answer-status,.explanation-panel{padding:18px 15px}.answer-status dl div{display:grid;gap:0}.answer-status dt{min-width:0}.analysis-row{display:block}.exam-topbar{top:64px;padding:8px 12px}.exam-topbar>div:first-child{display:grid;gap:0}.exam-topbar>div:first-child strong{font-size:14px}.exam-topbar>div:first-child span{font-size:12px}.exam-timer{display:grid;gap:0;text-align:right}.exam-timer span{font-size:11px}.exam-timer strong{font-size:17px}.saving-state{display:none}.exam-layout{display:block}.desktop-sheet{display:none}.mobile-sheet-button{display:flex;position:fixed;z-index:40;bottom:15px;left:14px;right:14px;width:calc(100% - 28px);box-shadow:0 5px 20px #1c306c4d}.mobile-sheet-backdrop{display:block}.mobile-sheet{position:absolute;left:0;right:0;bottom:0;max-height:80vh;overflow-y:auto;padding:18px 14px 24px;border-radius:18px 18px 0 0;background:#fff}.mobile-sheet .answer-sheet{padding:8px 0;border:0}.sheet-close{float:right;border:0;background:transparent;color:var(--primary);font-weight:700;cursor:pointer}.answer-grid{grid-template-columns:repeat(7,1fr)}.result-stats{grid-template-columns:repeat(2,1fr)}.dialog-actions{flex-direction:column-reverse}.dialog-actions .button{width:100%}}@media(max-width:390px){.answer-grid{grid-template-columns:repeat(6,1fr)}.option-row{padding:12px 10px}.score strong{font-size:62px}}@media(prefers-reduced-motion:reduce){*,*:before,*:after{scroll-behavior:auto!important;animation-duration:.01ms!important}}