.sidebar{width:260px;background:var(--sidebar-bg, var(--bg-secondary));display:flex;flex-direction:column;flex-shrink:0;border-right:1px solid var(--border-color);transition:background-color var(--transition-normal)}.sidebar-header{padding:20px;border-bottom:1px solid var(--border-color);display:flex;align-items:center;justify-content:space-between}.sidebar-toggle-btn{width:36px;height:36px;background:var(--bg-tertiary);border:1px solid var(--border-color);border-radius:8px;cursor:pointer;display:flex;align-items:center;justify-content:center;color:var(--text-muted);transition:background-color .2s}.sidebar-toggle-btn:hover{background:var(--bg-hover);color:var(--text-primary)}.app-logo{display:flex;align-items:center;gap:12px}.app-logo-icon{width:36px;height:36px;border-radius:10px;display:flex;align-items:center;justify-content:center}.app-logo span{font-size:18px;font-weight:600;color:var(--text-primary)}.sidebar-section-title{padding:16px 20px 8px;font-size:12px;text-transform:uppercase;letter-spacing:.5px;color:var(--text-muted)}.conversation-list{flex:1;overflow-y:auto;padding:8px 12px}.conversation-item{display:flex;align-items:center;gap:12px;padding:12px;border-radius:8px;cursor:pointer;transition:background .2s,color .2s;color:var(--text-secondary);position:relative}.conversation-item:hover{background:var(--bg-hover);color:var(--text-primary)}.conversation-item.active{background:var(--bg-tertiary);color:var(--accent-color)}.conversation-icon{font-size:16px;flex-shrink:0}.conversation-title{flex:1;overflow:hidden;text-overflow:ellipsis;white-space:nowrap;font-size:14px}.conversation-item .delete-btn{opacity:0;position:absolute;right:8px;width:24px;height:24px;border-radius:4px;display:flex;align-items:center;justify-content:center;color:var(--text-muted);font-size:18px;transition:all .2s;background:none;border:none;cursor:pointer}.conversation-item:hover .delete-btn{opacity:1}.conversation-item .delete-btn:hover{background:#ef44441a;color:#ef4444}.new-chat-area{padding:12px;border-top:1px solid var(--border-color);margin-top:auto}.new-chat-btn{width:100%;display:flex;align-items:center;justify-content:center;gap:8px;padding:12px;background:#2196f3;color:#fff;border-radius:8px;font-size:14px;font-weight:500;transition:all .2s;border:none;cursor:pointer}.new-chat-btn:hover{transform:translateY(-1px);box-shadow:0 4px 12px #2196f34d}.new-chat-btn .icon{font-size:18px}.sidebar-footer{padding:12px;border-top:1px solid var(--border-color)}.sidebar-footer-item{display:flex;align-items:center;gap:12px;padding:12px;border-radius:8px;color:var(--text-secondary);text-decoration:none;transition:all .2s;background:transparent;border:none;cursor:pointer;width:100%;font-size:14px}.sidebar-footer-item:hover{background:var(--bg-hover);color:var(--text-primary);text-decoration:none}.sidebar-footer-item .icon{font-size:18px}.ip-info-card-wrapper{position:relative;margin-top:12px}.ip-info-card-link{display:block;border-radius:12px;overflow:hidden;transition:transform .2s,opacity .2s}.ip-info-card-link:hover{transform:scale(1.02);opacity:.9}.ip-info-card-img{width:100%;height:auto;display:block;border-radius:12px}.ip-info-card-popup{position:fixed;left:280px;bottom:20px;width:380px;z-index:1000;opacity:0;visibility:hidden;transform:translate(-10px);transition:opacity .3s,visibility .3s,transform .3s;pointer-events:none}.ip-info-card-wrapper:hover .ip-info-card-popup{opacity:1;visibility:visible;transform:translate(0)}.ip-info-card-popup-img{width:100%;height:auto;display:block;border-radius:16px;box-shadow:0 8px 32px #0000004d}@media (max-width: 768px){.sidebar{display:flex;width:100%}.sidebar-header{padding:16px}.app-logo-icon,.sidebar-toggle-btn{width:32px;height:32px}}@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;text-indent:0;text-rendering:auto}.katex *{-ms-high-contrast-adjust:none!important;border-color:currentColor}.katex .katex-version:after{content:"0.16.27"}.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 .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;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;display:block;height:inherit;position:absolute;width:100%}.katex svg path{stroke:none}.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}.message{display:flex;gap:12px;margin-bottom:24px;padding:16px;border-radius:12px;transition:background-color var(--transition-normal)}.message.user{background:var(--user-msg-bg);border:1px solid var(--border-color)}.message.assistant{background:var(--assistant-msg-bg)}.message-avatar{width:32px;height:32px;border-radius:8px;display:flex;align-items:center;justify-content:center;font-size:12px;font-weight:600;flex-shrink:0}.message.user .message-avatar{background:#9e9e9e;color:#fff}.message.assistant .message-avatar{background:#2196f3;color:#fff}.message-content{flex:1;min-width:0;font-size:15px;line-height:1.6;color:var(--text-primary);overflow-wrap:break-word;word-break:break-word}.message-content p{margin:0 0 8px}.message-content p:last-child{margin-bottom:0}.message-content table{width:100%;border-collapse:collapse;margin:12px 0;font-size:14px;overflow-x:auto;display:block}.message-content thead{background:var(--bg-secondary)}.message-content th,.message-content td{padding:10px 14px;border:1px solid var(--border-color);text-align:left;white-space:nowrap}.message-content th{font-weight:600;background:var(--bg-tertiary)}.message-content tbody tr:hover{background:var(--bg-hover)}.katex-display{overflow-x:auto;overflow-y:hidden;max-width:100%;margin:1em 0}.code-block-wrapper{position:relative;margin:12px 0;border-radius:8px;overflow:hidden;border:1px solid var(--border-color);background:var(--code-bg)}.code-block-header{display:flex;justify-content:space-between;align-items:center;padding:8px 12px;background:var(--code-header-bg);border-bottom:1px solid var(--border-color)}.code-language{font-size:12px;font-weight:500;color:var(--text-secondary);text-transform:capitalize}.code-copy-btn{display:flex;align-items:center;justify-content:center;width:28px;height:28px;background:transparent;border:none;border-radius:6px;cursor:pointer;color:var(--text-muted);transition:all .2s}.code-copy-btn:hover{background:var(--bg-hover);color:var(--text-primary)}.code-block-content{margin:0;padding:16px;overflow-x:auto;background:var(--code-bg)}.code-block-content code{font-family:SF Mono,Consolas,Liberation Mono,monospace;font-size:13px;line-height:1.5;color:var(--code-text)}.code-copy-toast{position:absolute;top:50px;right:12px;background:var(--text-primary);color:var(--bg-primary);padding:8px 16px;border-radius:8px;font-size:13px;font-weight:500;animation:toastSlideIn .3s ease,toastFadeOut .3s ease 1.7s forwards;box-shadow:0 4px 12px #00000026;z-index:10}@keyframes toastSlideIn{0%{opacity:0;transform:translateY(-10px)}to{opacity:1;transform:translateY(0)}}@keyframes toastFadeOut{0%{opacity:1}to{opacity:0}}.message-content pre{background:var(--code-bg);color:var(--code-text);padding:16px;border-radius:8px;overflow-x:auto;margin:12px 0;max-width:100%;border:1px solid var(--border-color)}.message-content code{font-family:SF Mono,Consolas,Liberation Mono,monospace;font-size:13px}.message-content p code,.message-content li code,.inline-code{background:var(--inline-code-bg);color:var(--text-primary);padding:2px 6px;border-radius:4px;font-size:13px;font-family:SF Mono,Consolas,Liberation Mono,monospace}.math-inline{font-family:Times New Roman,Georgia,serif;font-style:italic;color:var(--text-primary)}.typing-indicator{display:flex;gap:4px;padding:8px 0}.typing-indicator span{width:8px;height:8px;background:var(--text-muted);border-radius:50%;animation:bounce 1.4s infinite ease-in-out both}.typing-indicator span:nth-child(1){animation-delay:-.32s}.typing-indicator span:nth-child(2){animation-delay:-.16s}@keyframes bounce{0%,80%,to{transform:scale(0)}40%{transform:scale(1)}}.thinking-section{margin-bottom:16px;background:var(--bg-secondary);border:1px solid var(--border-color);border-radius:12px;overflow:hidden;transition:background-color var(--transition-normal)}.thinking-header{display:flex;align-items:center;gap:8px;padding:12px 16px;cursor:pointer;-webkit-user-select:none;user-select:none;font-size:14px;font-weight:500;color:var(--text-secondary);list-style:none}.thinking-header::-webkit-details-marker{display:none}.thinking-header:before{content:"▶";font-size:10px;transition:transform .2s}details[open] .thinking-header:before{transform:rotate(90deg)}.thinking-icon{font-size:16px;display:flex;align-items:center;justify-content:center}.thinking-spinner{display:inline-block;animation:sparkle 1.5s ease-in-out infinite}@keyframes sparkle{0%,to{opacity:1;transform:scale(1)}50%{opacity:.6;transform:scale(1.1)}}.typing-cursor{display:inline-block;width:2px;height:1em;background:#2196f3;margin-left:2px;vertical-align:text-bottom;animation:blink 1s step-end infinite}@keyframes blink{0%,50%{opacity:1}51%,to{opacity:0}}.thinking-time{margin-left:4px;color:#718096;font-weight:400}.thinking-content{padding:0 16px 16px;font-size:13px;color:#374151;line-height:1.6;max-height:400px;overflow-y:auto}.thinking-content p{margin:0 0 8px}.thinking-content pre{background:#1a1a1a;color:inherit}.message-footer{margin-top:12px;padding-top:12px;border-top:1px dashed #e5e5e5}.usage-info{font-size:12px;color:#888;margin-bottom:8px}.message-actions{display:flex;gap:8px}.action-btn{background:none;border:none;padding:6px;cursor:pointer;color:#666;border-radius:4px;transition:background .2s,color .2s;display:flex;align-items:center;justify-content:center}.action-btn:hover{background:#f0f0f0;color:#333}.action-btn svg{display:block}.message-attachments{display:flex;flex-wrap:wrap;gap:8px;margin-bottom:12px}.attachment-item{max-width:200px}.attachment-image{max-width:100%;border-radius:8px}.attachment-file{display:flex;align-items:center;gap:8px;padding:8px 12px;background:#f5f5f5;border-radius:8px;font-size:12px}.attachment-icon{font-size:16px}.attachment-name{flex:1;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.attachment-size{color:#888}.message-content .katex-display{margin:16px 0;overflow-x:auto;overflow-y:hidden}.message-content .katex{font-size:1.1em}.thinking-content .katex-display{margin:12px 0}.thinking-content .katex{font-size:1em}.generated-images{display:flex;flex-wrap:wrap;gap:12px;margin-bottom:16px}.generated-image{max-width:100%;max-height:500px;border-radius:12px;box-shadow:0 2px 8px #0000001a}@media (max-width: 768px){.message{padding:12px;gap:8px;margin-bottom:16px}.message-avatar{width:28px;height:28px}.message-avatar svg{width:16px;height:16px}.message-content{font-size:14px;line-height:1.5}.code-block-wrapper{margin:8px 0}.code-block-header{padding:6px 10px}.code-language{font-size:11px}.code-copy-btn{width:24px;height:24px}.thinking-section{margin-bottom:12px}.thinking-header{padding:10px 12px;font-size:13px}.thinking-content{padding:12px;font-size:13px}.message-footer{flex-direction:column;gap:8px;align-items:flex-start}.usage-info{font-size:11px}.message-actions{gap:4px}.action-btn{width:28px;height:28px}.message-attachments{gap:8px}.attachment-image{max-height:150px}.generated-image{max-height:300px}}.bottom-sheet-overlay{position:fixed;top:0;left:0;right:0;bottom:0;background:#00000080;z-index:2000;animation:fadeIn .3s ease}.bottom-sheet-overlay.closing{animation:fadeOut .3s ease forwards}.bottom-sheet{position:fixed;bottom:0;left:0;right:0;background:var(--bg-primary);border-radius:20px 20px 0 0;max-height:70vh;display:flex;flex-direction:column;animation:slideUp .4s cubic-bezier(.4,0,.2,1)}.bottom-sheet.closing{animation:slideDown .3s cubic-bezier(.4,0,.2,1) forwards}.bottom-sheet-handle{width:40px;height:4px;background:var(--border-color);border-radius:2px;margin:12px auto}.bottom-sheet-header{padding:8px 20px 16px;text-align:center}.bottom-sheet-title{font-size:16px;font-weight:600;color:var(--text-primary)}.bottom-sheet-content{flex:1;overflow-y:auto;padding:0 8px 24px;-webkit-overflow-scrolling:touch}.model-group{margin-bottom:16px}.model-group-title{padding:8px 16px;font-size:13px;font-weight:600;color:var(--text-muted);text-transform:uppercase;letter-spacing:.5px}.model-option{display:flex;align-items:center;justify-content:space-between;width:100%;padding:16px;background:transparent;border:none;border-radius:12px;cursor:pointer;text-align:left;transition:background .2s}.model-option:hover{background:var(--bg-hover)}.model-option:active{background:var(--bg-tertiary)}.model-option.selected{background:var(--bg-secondary)}.model-option-name{font-size:15px;font-weight:500;color:var(--text-primary)}.model-option.selected .model-option-name{color:var(--accent-color)}.model-option svg{color:var(--accent-color);flex-shrink:0}@keyframes fadeIn{0%{opacity:0}to{opacity:1}}@keyframes fadeOut{0%{opacity:1}to{opacity:0}}@keyframes slideUp{0%{transform:translateY(100%)}to{transform:translateY(0)}}@keyframes slideDown{0%{transform:translateY(0)}to{transform:translateY(100%)}}@media (min-width: 769px){.bottom-sheet-overlay{display:none}}.input-container{padding:16px 24px 24px;background:var(--bg-primary);flex-shrink:0;margin-top:auto;transition:background-color var(--transition-normal)}.input-wrapper{max-width:800px;margin:0 auto;background:var(--input-bg);border:1px solid var(--border-color);border-radius:16px;overflow:hidden;box-shadow:0 2px 8px var(--shadow-color);transition:background-color var(--transition-normal),border-color var(--transition-normal)}.chat-input{width:100%;padding:16px 20px;border:none;outline:none;resize:none;font-size:15px;line-height:1.5;background:transparent;min-height:24px;max-height:200px;color:var(--text-primary)}.chat-input::placeholder{color:var(--text-muted)}.chat-input:disabled{background:var(--bg-tertiary);cursor:not-allowed}.input-toolbar{display:flex;justify-content:space-between;align-items:center;padding:8px 12px;border-top:1px solid var(--border-color);background:var(--bg-secondary);transition:background-color var(--transition-normal)}.toolbar-left,.toolbar-right{display:flex;align-items:center;gap:8px}.toolbar-btn{width:32px;height:32px;display:flex;align-items:center;justify-content:center;border-radius:8px;font-size:16px;color:var(--text-muted);transition:all .2s;background:transparent;border:none;cursor:pointer}.toolbar-btn:hover{background:var(--bg-hover);color:var(--text-primary)}.char-count{font-size:12px;color:var(--text-muted)}.model-selector{padding:6px 12px;border:1px solid var(--border-color);border-radius:8px;font-size:12px;background:var(--input-bg);color:var(--text-primary);cursor:pointer;max-width:180px}.model-selector:hover{border-color:var(--text-muted)}.model-pill{display:inline-flex;align-items:center;gap:6px;padding:8px 14px;background:var(--bg-tertiary);border:none;border-radius:20px;font-size:14px;font-weight:500;color:var(--text-primary);cursor:pointer;transition:background .2s}.model-pill:hover{background:var(--bg-hover)}.model-pill:active{background:var(--border-color)}.model-pill-text{max-width:100px;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.model-pill svg{flex-shrink:0;color:var(--text-muted)}.send-btn{width:36px;height:36px;background:#2196f3;color:#fff;border-radius:10px;font-size:18px;font-weight:700;display:flex;align-items:center;justify-content:center;transition:all .2s}.send-btn:hover:not(:disabled){transform:translateY(-1px);box-shadow:0 4px 12px #2196f34d}.send-btn:disabled{background:#ccc;cursor:not-allowed}.send-btn.stop-btn{background:#ef4444}.send-btn.stop-btn:hover{background:#dc2626;box-shadow:0 4px 12px #ef44444d}.attachments-preview{display:flex;flex-wrap:wrap;gap:8px;padding:12px 16px;border-bottom:1px solid #f0f0f0}.attachment-preview-item{position:relative;border-radius:8px;overflow:hidden}.attachment-preview-image{height:64px;width:auto;border-radius:8px}.attachment-preview-file{display:flex;align-items:center;gap:8px;padding:8px 12px;background:#f5f5f5;border-radius:8px;font-size:12px}.attachment-remove{position:absolute;top:-6px;right:-6px;width:20px;height:20px;background:#ef4444;color:#fff;border-radius:50%;font-size:14px;display:flex;align-items:center;justify-content:center;cursor:pointer;border:2px solid white}.attachment-remove:hover{background:#dc2626}@media (max-width: 768px){.input-container{padding:12px}.input-wrapper{border-radius:12px}.chat-input{padding:12px 16px;font-size:14px}.input-toolbar{padding:8px 12px;flex-wrap:wrap;gap:10px}.toolbar-btn{width:28px;height:28px;font-size:14px}.model-selector,.char-count{display:none}.send-btn{width:40px;height:40px;border-radius:50%}.attachments-preview{gap:8px;padding:8px}.attachment-preview-image{height:48px}}.christmas-snow-container{position:fixed;top:0;left:0;right:0;bottom:0;pointer-events:none;z-index:9998;overflow:hidden}.christmas-snowflake{position:absolute;top:-30px;color:#fff;text-shadow:0 0 8px rgba(255,255,255,.9);animation:snowFall linear infinite;-webkit-user-select:none;user-select:none}@keyframes snowFall{0%{transform:translateY(-30px) rotate(0);opacity:0}10%{opacity:1}90%{opacity:1}to{transform:translateY(100vh) rotate(720deg);opacity:0}}.christmas-elements-container{position:fixed;top:0;left:0;right:0;bottom:0;pointer-events:none;z-index:9997;overflow:hidden}.christmas-element{position:absolute;cursor:pointer;pointer-events:auto;-webkit-user-select:none;user-select:none;animation:floatElement ease-in-out infinite;transition:transform .2s;filter:drop-shadow(0 2px 4px rgba(0,0,0,.3))}.christmas-element:hover{transform:scale(1.3)!important;filter:drop-shadow(0 4px 8px rgba(0,0,0,.4))}.christmas-element:active{transform:scale(.9)!important}@keyframes floatElement{0%,to{transform:translateY(0) rotate(var(--rotation, 0deg))}50%{transform:translateY(-15px) rotate(var(--rotation, 0deg))}}.christmas-greeting{position:fixed;transform:translate(-50%,-50%);background:linear-gradient(135deg,#c41e3a,#1a5f2a);color:#fff;padding:12px 24px;border-radius:25px;font-size:18px;font-weight:700;white-space:nowrap;box-shadow:0 4px 20px #0006;z-index:10001;animation:greetingPopup 2s ease-out forwards;pointer-events:none}@keyframes greetingPopup{0%{opacity:0;transform:translate(-50%,-50%) scale(.5)}20%{opacity:1;transform:translate(-50%,-50%) scale(1.1)}30%{transform:translate(-50%,-50%) scale(1)}70%{opacity:1;transform:translate(-50%,-100%) scale(1)}to{opacity:0;transform:translate(-50%,-150%) scale(.8)}}@media (max-width: 768px){.christmas-snowflake:nth-child(n+20){display:none}.christmas-element:nth-child(n+8){display:none}.christmas-element{font-size:18px!important}.christmas-greeting{font-size:14px;padding:8px 16px}}.chat-page{display:flex;height:100vh;height:100dvh;width:100%;overflow:hidden;position:relative}.sidebar-wrapper{width:260px;height:100%;flex-shrink:0;transition:width .3s ease,margin-left .3s ease;overflow:hidden}.sidebar-wrapper.collapsed{width:0}.sidebar-wrapper .sidebar{width:260px;height:100%}.sidebar-expand-btn{position:absolute;left:16px;top:16px;z-index:200;width:36px;height:36px;background:var(--bg-secondary);border:1px solid var(--border-color);border-radius:8px;cursor:pointer;display:flex;align-items:center;justify-content:center;color:var(--text-muted);transition:background-color .2s}.sidebar-expand-btn:hover{background:var(--bg-hover);color:var(--text-primary)}.sidebar-backdrop{display:none}.chat-main{flex:1;display:flex;flex-direction:column;min-width:0;min-height:0;height:100%;background:var(--bg-primary);overflow:hidden;transition:background-color var(--transition-normal);position:relative}.theme-toggle-header{position:absolute;top:16px;right:24px;z-index:100}.theme-toggle-btn{width:40px;height:40px;border-radius:50%;background:var(--bg-secondary);border:1px solid var(--border-color);font-size:20px;cursor:pointer;display:flex;align-items:center;justify-content:center;transition:all .2s;box-shadow:0 2px 8px var(--shadow-color)}.theme-toggle-btn:hover{background:var(--bg-hover);transform:scale(1.05)}.messages-container{flex:1;display:flex;flex-direction:column;min-height:0;overflow-y:auto;overflow-x:hidden}.empty-state{flex:1;display:flex;flex-direction:column;align-items:center;justify-content:center;padding:48px}.empty-state-icon{width:64px;height:64px;background:var(--bg-tertiary);border-radius:16px;display:flex;align-items:center;justify-content:center;font-size:28px;margin-bottom:24px}.empty-state-title{font-size:24px;font-weight:600;color:var(--text-primary);margin-bottom:8px}.empty-state-text{font-size:15px;color:var(--text-muted);text-align:center;max-width:400px}.messages-list{max-width:800px;width:100%;margin:0 auto;padding:24px 24px 80px}.toast{position:fixed;bottom:100px;left:50%;transform:translate(-50%);background:var(--bg-tertiary);color:var(--text-primary);padding:12px 24px;border-radius:8px;font-size:14px;z-index:1000;animation:fadeInOut 2s ease-in-out;box-shadow:0 4px 12px var(--shadow-color)}@keyframes fadeInOut{0%{opacity:0;transform:translate(-50%) translateY(20px)}15%{opacity:1;transform:translate(-50%) translateY(0)}85%{opacity:1;transform:translate(-50%) translateY(0)}to{opacity:0;transform:translate(-50%) translateY(-10px)}}@media (max-width: 768px){.sidebar-wrapper{position:fixed;left:0;top:0;height:100%;z-index:1000;width:280px;transform:translate(-100%);transition:transform .4s cubic-bezier(.4,0,.2,1)}.sidebar-wrapper:not(.collapsed){transform:translate(0)}.sidebar-wrapper.collapsed{transform:translate(-100%)}.sidebar-wrapper .sidebar{width:280px}.sidebar-expand-btn{display:flex;z-index:999}.sidebar-backdrop{display:block;position:fixed;top:0;left:0;right:0;bottom:0;background:#00000080;z-index:999;animation:fadeIn .4s ease-out}@keyframes fadeIn{0%{opacity:0}to{opacity:1}}.chat-main{width:100%}.theme-toggle-header{top:12px;right:12px}.theme-toggle-btn{width:36px;height:36px}.messages-container,.messages-list{padding:12px}.empty-state{padding:20px}.empty-state-icon{font-size:48px}.empty-state-title{font-size:20px}.empty-state-subtitle{font-size:13px}.toast{left:50%;right:auto;max-width:90%}}@media (max-width: 480px){.sidebar-wrapper{width:85%}.sidebar-wrapper .sidebar{width:100%}}.admin-page{min-height:100vh;width:100%;background:#f5f5f5;display:flex}.admin-sidebar{width:180px;background:#fff;border-right:1px solid #e5e5e5;display:flex;flex-direction:column;flex-shrink:0}.admin-sidebar-header{padding:20px 16px;font-size:18px;font-weight:600;color:#333;display:flex;align-items:center;gap:8px}.admin-sidebar-menu{flex:1;padding:8px}.admin-menu-item{display:flex;align-items:center;gap:10px;padding:12px 16px;border-radius:8px;color:#666;font-size:14px;cursor:pointer;transition:all .15s ease;text-decoration:none}.admin-menu-item:hover{background:#f0f0f0;color:#333;text-decoration:none}.admin-menu-item.active{background:#e8f0fe;color:#1a73e8}.admin-menu-item .icon{font-size:18px;width:24px;text-align:center}.admin-sidebar-footer{padding:16px;border-top:1px solid #e5e5e5}.back-to-chat{display:flex;align-items:center;gap:8px;padding:10px 16px;border-radius:8px;color:#666;font-size:14px;text-decoration:none;transition:all .15s ease}.back-to-chat:hover{background:#f0f0f0;color:#333;text-decoration:none}.provider-panel{width:280px;background:#fff;border-right:1px solid #e5e5e5;display:flex;flex-direction:column;flex-shrink:0;height:100vh;max-height:100vh}.provider-list-container{flex:1;overflow-y:auto;padding:8px;min-height:0}.provider-list-item{display:flex;align-items:center;gap:12px;padding:12px 16px;border-radius:8px;cursor:pointer;transition:all .15s ease}.provider-list-item:hover{background:#f5f5f5}.provider-list-item.active{background:#e8f0fe}.provider-list-item.active .provider-list-name{color:#1a73e8}.provider-icon{width:36px;height:36px;border-radius:8px;display:flex;align-items:center;justify-content:center;font-size:18px;flex-shrink:0}.provider-icon.openai{background:linear-gradient(135deg,#10a37f,#0d9269);color:#fff}.provider-icon.claude{background:linear-gradient(135deg,#d97706,#ea580c);color:#fff}.provider-icon.gemini{background:linear-gradient(135deg,#4285f4,#1a73e8);color:#fff}.provider-icon.deepseek{background:linear-gradient(135deg,#6366f1,#8b5cf6);color:#fff}.provider-icon.default{background:linear-gradient(135deg,#64748b,#475569);color:#fff}.provider-list-info{flex:1;min-width:0}.provider-list-name{font-size:14px;font-weight:500;color:#333;margin-bottom:2px}.provider-status-dot{width:8px;height:8px;border-radius:50%;flex-shrink:0}.provider-status-dot.enabled{background:#10a37f}.provider-status-dot.disabled{background:#e0e0e0}.provider-list-actions{padding:12px;border-top:1px solid #e5e5e5;display:flex;flex-direction:column;gap:8px;flex-shrink:0}.add-provider-btn{width:100%;padding:10px 16px;background:#fff;border:1px solid #1a73e8;border-radius:8px;color:#1a73e8;font-size:14px;font-weight:500;display:flex;align-items:center;justify-content:center;gap:6px;transition:all .15s ease}.add-provider-btn:hover{background:#e8f0fe}.provider-detail{flex:1;background:#fff;padding:32px;overflow-y:auto;height:100vh;max-height:100vh;min-height:0}.provider-detail-header{display:flex;align-items:center;gap:12px;margin-bottom:32px}.provider-detail-title{font-size:24px;font-weight:600;color:#333;flex:1}.provider-header-actions{display:flex;gap:12px}.form-btn.danger{background:#fff;border:1px solid #e53935;color:#e53935}.form-btn.danger:hover{background:#ffebee}.provider-detail-link{color:#999;font-size:16px}.form-section{margin-bottom:28px}.form-label{font-size:14px;font-weight:500;color:#333;margin-bottom:10px;display:block}.form-input-group{display:flex;gap:12px}.form-input{flex:1;padding:12px 16px;background:#fff;border:1px solid #e0e0e0;border-radius:8px;color:#333;font-size:14px;transition:border-color .15s ease}.form-input:focus{outline:none;border-color:#1a73e8}.form-input::placeholder{color:#999}.form-input-icon{position:absolute;right:12px;top:50%;transform:translateY(-50%);color:#999;cursor:pointer}.form-input-wrapper{position:relative;flex:1}.form-btn{padding:12px 20px;background:#1a73e8;color:#fff;border-radius:8px;font-size:14px;font-weight:500;white-space:nowrap;transition:all .15s ease}.form-btn:hover{background:#1557b0}.form-btn.secondary{background:#f5f5f5;color:#333;border:1px solid #e0e0e0}.form-btn.secondary:hover{background:#e8e8e8}.form-hint{font-size:12px;color:#999;margin-top:8px}.models-section{margin-top:32px}.models-header{display:flex;align-items:center;justify-content:space-between;margin-bottom:16px}.models-title{font-size:14px;font-weight:500;color:#333}.models-actions{display:flex;gap:8px}.models-action-btn{padding:6px 12px;background:#f5f5f5;border:1px solid #e0e0e0;border-radius:6px;color:#333;font-size:13px;display:flex;align-items:center;gap:4px;transition:all .15s ease}.models-action-btn:hover{background:#e8e8e8}.models-action-btn.primary{background:#fff;border-color:#1a73e8;color:#1a73e8}.models-action-btn.primary:hover{background:#e8f0fe}.models-list{display:flex;flex-direction:column;gap:8px}.model-item{display:flex;align-items:center;justify-content:space-between;padding:14px 16px;background:#fafafa;border:1px solid #e5e5e5;border-radius:8px}.model-info{flex:1}.model-name{font-size:14px;font-weight:500;color:#333;margin-bottom:4px}.model-meta{display:flex;align-items:center;gap:12px;font-size:12px;color:#999}.model-actions{display:flex;gap:8px}.model-action-btn{width:32px;height:32px;border-radius:6px;display:flex;align-items:center;justify-content:center;color:#999;font-size:16px;transition:all .15s ease}.model-action-btn:hover{background:#f0f0f0;color:#666}.model-action-btn.delete:hover{background:#ffebee;color:#e53935}.login-container{max-width:400px;margin:0 auto;padding:48px 40px;background:#fff;border-radius:20px;border:none;box-shadow:0 8px 40px #0000001f}.login-page{min-height:100vh;display:flex;align-items:center;justify-content:center;background:linear-gradient(135deg,#f5f8fc,#e8f0f8);padding:20px}.login-container h2{text-align:center;margin-bottom:8px;font-size:26px;font-weight:700;color:#333}.login-subtitle{text-align:center;color:#666;font-size:14px;margin-bottom:32px}.login-form{display:flex;flex-direction:column;gap:20px}.login-form .form-input{padding:14px 16px;background:#f8f9fa;border:2px solid #e5e5e5;border-radius:12px;font-size:15px;transition:all .2s ease}.login-form .form-input:focus{outline:none;border-color:#2196f3;background:#fff;box-shadow:0 0 0 4px #2196f31a}.login-form .form-input::placeholder{color:#999}.login-btn{padding:16px;background:#2196f3;color:#fff;border:none;border-radius:12px;font-size:16px;font-weight:600;cursor:pointer;transition:all .2s ease;margin-top:8px}.login-btn:hover:not(:disabled){background:#1976d2;transform:translateY(-2px);box-shadow:0 6px 20px #2196f359}.login-btn:disabled{background:#ccc;cursor:not-allowed}.login-error{color:#d32f2f;font-size:14px;text-align:center;padding:14px;background:#ffebee;border-radius:10px;border:1px solid #ffcdd2}.login-back-link{text-align:center;margin-top:28px;padding-top:24px;border-top:1px solid #eee}.login-back-link a{color:#2196f3;font-size:14px;font-weight:500;text-decoration:none;display:inline-flex;align-items:center;gap:6px;transition:color .2s}.login-back-link a:hover{color:#1976d2}.provider-empty{flex:1;display:flex;flex-direction:column;align-items:center;justify-content:center;padding:48px;text-align:center;color:#999}.provider-empty-icon{font-size:48px;margin-bottom:16px}.provider-empty h3{font-size:18px;color:#666;margin-bottom:8px}@media (max-width: 1024px){.admin-sidebar{width:60px}.admin-menu-item span:not(.icon){display:none}.provider-panel{width:220px}}@media (max-width: 768px){.admin-page{flex-direction:column}.admin-sidebar{width:100%;flex-direction:row}.provider-panel{width:100%}}.logout-btn{width:100%;padding:10px 16px;background:transparent;border:1px solid #e0e0e0;border-radius:8px;color:#666;font-size:14px;display:flex;align-items:center;justify-content:center;gap:6px;transition:all .15s ease}.logout-btn:hover{background:#f5f5f5}.toggle-switch{width:44px;height:24px;background:#e0e0e0;border-radius:12px;position:relative;cursor:pointer;transition:background .2s ease}.toggle-switch.active{background:#1a73e8}.toggle-switch:after{content:"";position:absolute;width:20px;height:20px;background:#fff;border-radius:50%;top:2px;left:2px;transition:transform .2s ease;box-shadow:0 2px 4px #0003}.toggle-switch.active:after{transform:translate(20px)}.modal-overlay{position:fixed;top:0;left:0;right:0;bottom:0;background:#00000080;display:flex;align-items:center;justify-content:center;z-index:1000}.modal-content{background:#fff;border-radius:16px;width:90%;max-width:600px;max-height:80vh;display:flex;flex-direction:column;box-shadow:0 8px 32px #0003}.modal-header{display:flex;align-items:center;justify-content:space-between;padding:20px 24px;border-bottom:1px solid #e5e5e5}.modal-header h2{font-size:18px;font-weight:600;color:#333;margin:0}.modal-close{width:32px;height:32px;border-radius:6px;display:flex;align-items:center;justify-content:center;font-size:20px;color:#999;cursor:pointer}.modal-close:hover{background:#f0f0f0;color:#333}.modal-search{padding:16px 24px;border-bottom:1px solid #e5e5e5}.modal-body{flex:1;overflow-y:auto;padding:8px 24px}.model-select-item{display:flex;align-items:center;justify-content:space-between;padding:12px 16px;margin:8px 0;background:#fafafa;border:1px solid #e5e5e5;border-radius:8px;cursor:pointer;transition:all .15s ease}.model-select-item:hover{background:#f0f0f0;border-color:#d0d0d0}.model-select-item.selected{background:#e8f0fe;border-color:#1a73e8}.model-select-info{flex:1;min-width:0}.model-select-name{font-size:14px;font-weight:500;color:#333;margin-bottom:2px}.model-select-id{font-size:12px;color:#666;font-family:monospace;margin-bottom:4px}.model-select-meta{display:flex;gap:12px;font-size:11px;color:#999}.model-select-checkbox{width:24px;height:24px;border-radius:6px;border:2px solid #ddd;display:flex;align-items:center;justify-content:center;color:#fff;font-size:14px;flex-shrink:0;transition:all .15s ease}.model-select-checkbox.checked{background:#1a73e8;border-color:#1a73e8}.modal-footer{display:flex;align-items:center;justify-content:space-between;padding:16px 24px;border-top:1px solid #e5e5e5}.modal-count{font-size:13px;color:#666}.modal-actions{display:flex;gap:12px}:root{--bg-primary: #ffffff;--bg-secondary: #f7f7f8;--bg-tertiary: #ececec;--bg-hover: #e5e5e5;--text-primary: #1a1a1a;--text-secondary: #4a4a4a;--text-muted: #6b6b6b;--border-color: #d9d9d9;--accent-color: #10a37f;--accent-hover: #0d9269;--error-color: #ef4444;--user-msg-bg: #f7f7f8;--assistant-msg-bg: transparent;--input-bg: #ffffff;--scrollbar-bg: #f0f0f0;--scrollbar-thumb: #c0c0c0;--sidebar-bg: #f9f9f9;--header-bg: #ffffff;--shadow-color: rgba(0, 0, 0, .1);--code-bg: #f8f8f8;--code-header-bg: #f0f0f0;--code-text: #1a1a1a;--inline-code-bg: #e8e8e8;--sidebar-width: 260px;--header-height: 56px;--input-max-width: 768px;--message-max-width: 768px;--transition-fast: .15s ease;--transition-normal: .25s ease}[data-theme=dark]{--bg-primary: #212121;--bg-secondary: #171717;--bg-tertiary: #2f2f2f;--bg-hover: #3a3a3a;--text-primary: #ececec;--text-secondary: #b4b4b4;--text-muted: #8e8e8e;--border-color: #4e4e4e;--accent-color: #10a37f;--accent-hover: #0d9269;--error-color: #ef4444;--user-msg-bg: #2f2f2f;--assistant-msg-bg: transparent;--input-bg: #2f2f2f;--scrollbar-bg: #2f2f2f;--scrollbar-thumb: #555555;--sidebar-bg: #171717;--header-bg: #212121;--shadow-color: rgba(0, 0, 0, .3);--code-bg: #1e1e1e;--code-header-bg: #2d2d2d;--code-text: #d4d4d4;--inline-code-bg: #3a3a3a}*{margin:0;padding:0;box-sizing:border-box;-webkit-tap-highlight-color:transparent}html{height:100%;width:100%;overflow:hidden;overscroll-behavior:none}body{font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,Helvetica Neue,Arial,sans-serif;background-color:var(--bg-primary);color:var(--text-primary);line-height:1.6;overflow:hidden;margin:0;padding-top:env(safe-area-inset-top);padding-bottom:env(safe-area-inset-bottom);padding-left:env(safe-area-inset-left);padding-right:env(safe-area-inset-right);height:100%;height:100dvh;width:100%;transition:background-color var(--transition-normal),color var(--transition-normal);overscroll-behavior:none;position:fixed;top:0;left:0;right:0;bottom:0}#root{height:100%;width:100%;overflow:hidden}::-webkit-scrollbar{width:8px}::-webkit-scrollbar-track{background:var(--scrollbar-bg)}::-webkit-scrollbar-thumb{background:var(--scrollbar-thumb);border-radius:4px}::-webkit-scrollbar-thumb:hover{background:var(--text-muted)}button{font-family:inherit;cursor:pointer;border:none;background:none;color:inherit;transition:all var(--transition-fast)}button:disabled{opacity:.5;cursor:not-allowed}input,textarea{font-family:inherit;font-size:inherit;color:inherit;background:transparent;border:none;outline:none}a{color:var(--accent-color);text-decoration:none}a:hover{text-decoration:underline}pre{background:var(--bg-secondary);padding:16px;border-radius:8px;overflow-x:auto;margin:12px 0}code{font-family:SF Mono,Consolas,Liberation Mono,monospace;font-size:14px}.markdown-content{line-height:1.7}.markdown-content p{margin-bottom:12px}.markdown-content ul,.markdown-content ol{margin-left:24px;margin-bottom:12px}.markdown-content li{margin-bottom:4px}.markdown-content h1,.markdown-content h2,.markdown-content h3{margin:16px 0 8px;font-weight:600}.markdown-content blockquote{border-left:3px solid var(--accent-color);padding-left:16px;margin:12px 0;color:var(--text-secondary)}