:root{color-scheme:light;scrollbar-width:thin;scrollbar-color:oklch(0.7 0 0) transparent;scrollbar-gutter:stable;--radius:0.625rem;--code-bg:oklch(0.965 0 0);--code-fg:oklch(0.3 0 0);--code-border:oklch(0.88 0 0);--font-sans:"LXGW WenKai","PingFang SC","Microsoft YaHei","Hiragino Sans GB","Noto Sans CJK SC",sans-serif;--font-heading:"Noto Sans SC","PingFang SC","Microsoft YaHei","Hiragino Sans GB","Noto Sans CJK SC",sans-serif;--font-mono:"JetBrains Mono","LXGW WenKai",ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;--font-display:"STIX Two Text","Noto Sans SC",serif;--shadow-card:0 1px 2px oklch(0 0 0 / 0.04),0 8px 24px -12px oklch(0 0 0 / 0.1);--shadow-window:0 2px 6px oklch(0 0 0 / 0.06),0 24px 48px -24px oklch(0 0 0 / 0.22)} .dark{color-scheme:dark;scrollbar-color:oklch(0.4 0 0) transparent;--code-bg:oklch(0.235 0 0);--code-fg:oklch(0.87 0 0);--code-border:oklch(0.38 0 0);--shadow-card:0 1px 2px oklch(0 0 0 / 0.3),0 8px 24px -12px oklch(0 0 0 / 0.5);--shadow-window:0 2px 6px oklch(0 0 0 / 0.4),0 24px 48px -24px oklch(0 0 0 / 0.6)} *{box-sizing:border-box} html{scroll-behavior:smooth} body{margin:0;overflow-x:clip;background:var(--background);color:var(--foreground);font-family:var(--font-sans);font-size:16px;line-height:1.7;-webkit-font-smoothing:antialiased} h1,h2,h3,h4,h5,h6{font-family:var(--font-heading);margin:0} p{margin:0} a{color:inherit;text-decoration:none} ::selection{background:var(--selection-bg)} body *::-webkit-scrollbar{width:6px;height:6px} body *::-webkit-scrollbar-track{background:transparent} body *::-webkit-scrollbar-thumb{background:oklch(0.7 0 0);border-radius:3px} .dark body *::-webkit-scrollbar-thumb{background:oklch(0.4 0 0)} *,*::before,*::after{transition-property:color,background-color,border-color,outline-color,text-decoration-color,fill,stroke,box-shadow;transition-timing-function:cubic-bezier(0.4,0,0.2,1);transition-duration:300ms} @media (prefers-reduced-motion:reduce){html{scroll-behavior:auto} .reveal,.reveal > *{animation:none !important;opacity:1 !important}} .text-small-caps{font-variant-caps:small-caps;font-feature-settings:"smcp" 1;letter-spacing:0.08em;font-family:var(--font-display)} .font-mono{font-family:var(--font-mono)} .container{max-width:72rem;margin:0 auto;padding:0 1.5rem} @media (min-width:768px){.container{padding:0 2.5rem}} .icon{width:1em;height:1em;display:inline-block;vertical-align:-0.125em;fill:none;stroke:currentColor;stroke-width:1.8;stroke-linecap:round;stroke-linejoin:round} @keyframes rise-in{from{opacity:0;transform:translateY(10px)} to{opacity:1;transform:translateY(0)}} .reveal{opacity:0} .reveal.in{animation:rise-in 520ms cubic-bezier(0.22,1,0.36,1) forwards} .bg-mark{position:fixed;bottom:5rem;right:-2rem;width:auto;height:50vh;opacity:0.24;pointer-events:none;z-index:0;overflow:visible} .toolbar{position:fixed;top:1rem;right:1rem;z-index:50;display:flex;align-items:center;gap:0.25rem} .icon-btn{display:inline-flex;align-items:center;justify-content:center;width:2.25rem;height:2.25rem;border:1px solid transparent;border-radius:calc(var(--radius) * 0.8);background:transparent;color:var(--muted-foreground);cursor:pointer;font-size:1.125rem} .icon-btn:hover{background:var(--accent);color:var(--accent-foreground)} .icon-btn .icon{width:1.125rem;height:1.125rem} .theme-switcher{position:relative} .theme-popover{position:absolute;right:0;top:calc(100% + 0.5rem);width:11rem;border:1px solid var(--border);border-radius:calc(var(--radius) * 0.8);background:var(--popover);box-shadow:var(--shadow-window);padding:0.25rem;z-index:60} .theme-popover[hidden]{display:none} .popover-label{padding:0.375rem 0.5rem;font-size:0.75rem;font-weight:500;color:var(--muted-foreground)} .theme-option{display:flex;align-items:center;gap:0.5rem;width:100%;padding:0.375rem 0.5rem;border:0;border-radius:calc(var(--radius) * 0.6);background:transparent;color:var(--foreground);font-family:var(--font-sans);font-size:0.875rem;cursor:pointer;text-align:left} .theme-option:hover{background:var(--accent);color:var(--accent-foreground)} .theme-option .swatch{width:0.875rem;height:0.875rem;border-radius:9999px;border:1px solid var(--border);flex-shrink:0} .theme-option .tname{flex:1} .theme-option .tcheck{color:var(--primary);font-size:0.875rem} .btn{display:inline-flex;align-items:center;gap:0.5rem;padding:0.5rem 1.125rem;border-radius:calc(var(--radius) * 0.8);font-family:var(--font-sans);font-size:0.9375rem;font-weight:500;border:1px solid transparent;cursor:pointer;line-height:1.4} .btn-lg{padding:0.75rem 1.5rem;font-size:1rem} .btn-primary{background:var(--primary);color:var(--primary-foreground)} .btn-primary:hover{filter:brightness(1.06)} .btn-ghost{background:transparent;color:var(--foreground);border-color:var(--border)} .btn-ghost:hover{background:var(--accent);color:var(--accent-foreground)} .hero{position:relative;min-height:100vh;display:flex;align-items:center;padding-top:4rem;padding-bottom:4rem} .hero-grid{display:grid;align-items:center;gap:3rem} @media (min-width:1024px){.hero-grid{grid-template-columns:minmax(0,5fr) minmax(0,7fr);gap:4rem}} .eyebrow{color:var(--primary);font-size:0.8125rem;font-weight:600;margin-bottom:1.25rem} .wordmark{font-family:var(--font-display);font-size:clamp(2.2rem,8.5vw,4rem);font-weight:500;line-height:1.1;letter-spacing:-0.01em;white-space:nowrap} .slogan{margin-top:1.25rem;font-size:1.125rem;line-height:1.7;color:var(--muted-foreground)} .lead{margin-top:1rem;max-width:26rem;font-size:1.0625rem;line-height:1.8;color:var(--muted-foreground)} .hero-actions{margin-top:2rem;display:flex;gap:0.75rem;flex-wrap:wrap} .hero-meta{margin-top:2.5rem;display:flex;gap:1.5rem;color:var(--muted-foreground);font-size:0.8125rem;font-family:var(--font-mono)} .hero-meta b{color:var(--foreground);font-weight:500} .app-window{border:1px solid var(--border);border-radius:calc(var(--radius) * 1.4);background:var(--card);box-shadow:var(--shadow-window);overflow:hidden} .window-bar{display:flex;align-items:center;gap:0.5rem;padding:0.625rem 0.875rem;border-bottom:1px solid var(--border);background:var(--card)} .window-dot{width:0.625rem;height:0.625rem;border-radius:9999px;background:var(--border)} .window-dot:first-child{background:oklch(0.75 0.12 25)} .window-dot:nth-child(2){background:oklch(0.8 0.14 80)} .window-dot:nth-child(3){background:oklch(0.75 0.13 150)} .window-addr{flex:1;margin-left:0.375rem;padding:0.1875rem 0.625rem;border-radius:9999px;background:var(--muted);color:var(--muted-foreground);font-family:var(--font-mono);font-size:0.6875rem} .window-body{padding:1.25rem 1.25rem 1rem} .welcome-mock{display:grid;gap:1rem} @media (min-width:640px){.welcome-mock{grid-template-columns:minmax(0,2fr) minmax(0,3fr);align-items:center}} .wm-title{font-family:var(--font-display);font-size:1.375rem;font-weight:500} .wm-slogan{margin-top:0.375rem;font-size:0.8125rem;color:var(--muted-foreground)} .wm-btn{margin-top:1rem;display:inline-flex;align-items:center;gap:0.375rem;padding:0.375rem 0.875rem;border-radius:calc(var(--radius) * 0.7);background:var(--primary);color:var(--primary-foreground);font-size:0.8125rem} .wm-toc{display:grid;gap:0.625rem} .wm-group .wm-ghead{display:flex;align-items:baseline;gap:0.5rem;margin-bottom:0.125rem} .wm-gno{font-family:var(--font-display);font-size:0.6875rem;font-weight:600;color:var(--muted-foreground)} .wm-gname{font-family:var(--font-heading);font-size:0.75rem;font-weight:600;color:var(--foreground);opacity:0.8} .wm-gline{flex:1;border-bottom:1px solid var(--border)} .wm-item{display:flex;align-items:center;gap:0.5rem;padding:0.1875rem 0.25rem 0.1875rem 0.5rem;border-radius:calc(var(--radius) * 0.6);font-size:0.75rem;color:var(--muted-foreground)} .wm-item:hover{background:var(--accent);color:var(--accent-foreground)} .wm-dotline{flex:1;border-bottom:1px dotted var(--foreground);opacity:0.25} .section{padding:5rem 0} .section-head{max-width:40rem;margin-bottom:2.5rem} .kicker{font-family:var(--font-display);font-size:0.8125rem;font-weight:600;color:var(--muted-foreground);letter-spacing:0.04em} .kicker em{color:var(--primary);font-style:normal} .section-title{margin-top:0.5rem;font-size:1.875rem;font-weight:600;letter-spacing:-0.01em} .section-desc{margin-top:0.75rem;color:var(--muted-foreground);font-size:1rem;line-height:1.8} .toc-wrap{display:grid;gap:2rem} @media (min-width:1024px){.toc-wrap{grid-template-columns:minmax(0,4fr) minmax(0,8fr);gap:3rem;align-items:start}} .toc-sticky{position:static} @media (min-width:1024px){.toc-sticky{position:sticky;top:2rem}} .toc-list{display:grid;gap:1.75rem} .toc-group .toc-ghead{display:flex;align-items:baseline;gap:0.75rem;margin-bottom:0.25rem} .toc-gno{font-family:var(--font-display);font-size:0.875rem;font-weight:600;color:var(--muted-foreground);transform:translateY(-0.125rem)} .toc-gname{font-family:var(--font-heading);font-size:1rem;font-weight:600;color:var(--foreground);opacity:0.85} .toc-gline{flex:1;border-bottom:1px solid var(--border)} .toc-item{display:flex;align-items:center;gap:0.75rem;padding:0.4375rem 0.5rem 0.4375rem 0.75rem;border-radius:calc(var(--radius) * 0.7);color:var(--foreground);font-size:0.9375rem;line-height:1.5} .toc-item:hover{background:var(--accent);color:var(--accent-foreground)} .toc-item .dotline{flex:1;border-bottom:1px dotted var(--foreground);opacity:0.25} .toc-item:hover .dotline{opacity:0.5} .toc-item .icon{color:var(--muted-foreground);flex-shrink:0} .toc-item:hover .icon{color:var(--foreground)} .feature-grid{display:grid;gap:1.5rem} @media (min-width:900px){.feature-grid{grid-template-columns:repeat(2,minmax(0,1fr))}} .feature-card{display:flex;flex-direction:column;gap:1rem;padding:1.5rem;border:1px solid var(--border);border-radius:calc(var(--radius) * 1.2);background:var(--card);box-shadow:var(--shadow-card)} .feature-card:hover{box-shadow:var(--shadow-window);transform:translateY(-2px)} .fc-head{display:flex;align-items:flex-start;gap:0.75rem} .fc-icon{display:inline-flex;align-items:center;justify-content:center;width:2.5rem;height:2.5rem;border-radius:calc(var(--radius) * 0.8);background:var(--accent);color:var(--accent-foreground);flex-shrink:0} .fc-icon .icon{width:1.25rem;height:1.25rem} .fc-title{font-size:1.0625rem;font-weight:600;font-family:var(--font-heading)} .fc-tag{font-family:var(--font-mono);font-size:0.6875rem;color:var(--muted-foreground)} .fc-desc{font-size:0.875rem;line-height:1.75;color:var(--muted-foreground)} .mock{border:1px solid var(--border);border-radius:calc(var(--radius) * 0.9);background:var(--background);overflow:hidden;font-size:0.75rem} .mock-bar{display:flex;align-items:center;justify-content:space-between;gap:0.5rem;padding:0.375rem 0.75rem;border-bottom:1px solid var(--border);background:var(--card);color:var(--muted-foreground);font-size:0.6875rem;font-family:var(--font-mono)} .mock-body{padding:0.75rem;display:grid;gap:0.625rem} .mock-body.p0{padding:0} .mock-row{display:flex;align-items:center;gap:0.5rem;flex-wrap:wrap} .mock-col{display:grid;gap:0.5rem} .formula-demo{display:flex;align-items:center;justify-content:center;min-height:2.5rem;padding:0.5rem 0.75rem;border:1px dashed var(--border);border-radius:6px;background:var(--card);overflow:auto} .formula-demo-img{display:block;height:2.2rem;max-width:100%;aspect-ratio:8123.1 / 2431.9;background-color:var(--foreground);-webkit-mask:url("../assets/formula_ocr.svg") center / contain no-repeat;mask:url("../assets/formula_ocr.svg") center / contain no-repeat} .mock-label{font-size:0.6875rem;color:var(--muted-foreground);font-family:var(--font-mono)} .code-block{margin:0;font-family:var(--font-mono);font-size:0.6875rem;line-height:1.7;background:var(--code-bg);color:var(--code-fg);border:1px solid var(--code-border);border-radius:calc(var(--radius) * 0.7);padding:0.625rem 0.75rem;overflow:auto;white-space:pre} .code-block .c-kw{color:oklch(0.5 0.15 246)} .dark .code-block .c-kw{color:oklch(0.75 0.12 246)} .code-block .c-cm{color:var(--muted-foreground)} .badge{display:inline-flex;align-items:center;gap:0.25rem;padding:0.0625rem 0.5rem;border-radius:9999px;font-size:0.6875rem;font-family:var(--font-mono);background:var(--accent);color:var(--accent-foreground)} .badge.ok{background:oklch(0.93 0.06 150);color:oklch(0.4 0.12 150)} .dark .badge.ok{background:oklch(0.3 0.08 150);color:oklch(0.8 0.1 150)} .badge.blue{background:oklch(0.92 0.05 246);color:oklch(0.42 0.16 246)} .dark .badge.blue{background:oklch(0.3 0.07 246);color:oklch(0.78 0.1 246)} .badge.warn{background:oklch(0.93 0.07 80);color:oklch(0.45 0.12 80)} .dark .badge.warn{background:oklch(0.32 0.07 80);color:oklch(0.82 0.1 80)} .badge.danger{background:oklch(0.93 0.07 25);color:oklch(0.45 0.14 25)} .dark .badge.danger{background:oklch(0.32 0.08 25);color:oklch(0.82 0.1 25)} .mini-btn{display:inline-flex;align-items:center;gap:0.25rem;padding:0.1875rem 0.625rem;border-radius:calc(var(--radius) * 0.6);border:1px solid var(--border);background:var(--card);color:var(--foreground);font-size:0.6875rem;font-family:var(--font-sans);cursor:default} .mini-btn.pri{background:var(--primary);border-color:transparent;color:var(--primary-foreground)} .diff-line{font-family:var(--font-mono);font-size:0.6875rem;line-height:1.7;padding:0.125rem 0.5rem;border-radius:calc(var(--radius) * 0.4);white-space:normal;word-break:break-all} .diff-del{background:oklch(0.94 0.05 25 / 0.5);color:oklch(0.42 0.14 25);text-decoration:line-through;text-decoration-color:oklch(0.6 0.15 25)} .dark .diff-del{background:oklch(0.3 0.07 25 / 0.5);color:oklch(0.78 0.1 25)} .diff-add{background:oklch(0.94 0.06 150 / 0.5);color:oklch(0.4 0.12 150)} .dark .diff-add{background:oklch(0.3 0.08 150 / 0.5);color:oklch(0.8 0.1 150)} .diff-hunk{background:var(--accent);color:var(--accent-foreground);font-family:var(--font-mono);font-size:0.6875rem;padding:0.125rem 0.5rem;border-radius:calc(var(--radius) * 0.4)} .chat{display:grid;gap:0.625rem} .msg{max-width:88%;padding:0.5rem 0.75rem;border-radius:calc(var(--radius) * 0.8);font-size:0.75rem;line-height:1.7} .msg.user{justify-self:end;background:var(--primary);color:var(--primary-foreground)} .msg.assistant{justify-self:start;background:var(--card);border:1px solid var(--border);color:var(--foreground)} .think{border:1px solid var(--border);border-radius:calc(var(--radius) * 0.6);background:var(--muted);padding:0.375rem 0.625rem;font-size:0.6875rem;color:var(--muted-foreground);display:grid;gap:0.25rem} .toolchip{display:inline-flex;align-items:center;gap:0.25rem;padding:0.125rem 0.5rem;border-radius:9999px;border:1px dashed var(--border);font-family:var(--font-mono);font-size:0.625rem;color:var(--muted-foreground)} .chart-box{position:relative;height:7rem;border:1px solid var(--border);border-radius:calc(var(--radius) * 0.7);background:var(--card);overflow:hidden} .chart-box svg{position:absolute;inset:0;width:100%;height:100%} .chart-legend{display:flex;gap:0.75rem;font-size:0.6875rem;color:var(--muted-foreground)} .legend-dot{width:0.5rem;height:0.5rem;border-radius:9999px;display:inline-block;margin-right:0.25rem} .file-tree{font-family:var(--font-mono);font-size:0.6875rem;line-height:1.9;color:var(--foreground);white-space:pre;overflow:auto} .file-tree .dir{color:var(--muted-foreground)} .terminal{font-family:var(--font-mono);font-size:0.6875rem;line-height:1.8;background:oklch(0.16 0 0);color:oklch(0.85 0 0);border-radius:calc(var(--radius) * 0.7);padding:0.625rem 0.75rem;white-space:pre;overflow:auto} .terminal .ok{color:oklch(0.75 0.14 150)} .terminal .dim{color:oklch(0.6 0 0)} .steps{display:grid;gap:0.375rem} .step{display:flex;align-items:center;gap:0.5rem;font-size:0.75rem;color:var(--muted-foreground)} .step .sno{font-family:var(--font-mono);font-size:0.6875rem;color:var(--primary);width:1.125rem;text-align:right;flex-shrink:0} .step .sline{flex:1;border-bottom:1px dotted var(--border)} .step.done{color:var(--foreground)} .step.done .sno::after{content:"✓"} .step .schip{font-size:0.6875rem;font-family:var(--font-mono)} .mock-table{width:100%;border-collapse:collapse;font-size:0.6875rem} .mock-table th,.mock-table td{padding:0.3125rem 0.5rem;text-align:left;border-bottom:1px solid var(--border)} .mock-table th{font-family:var(--font-heading);font-weight:600;color:var(--muted-foreground)} .mock-table .doi{font-family:var(--font-mono);color:var(--primary);font-size:0.625rem} .principle-grid{display:grid;gap:1.5rem} @media (min-width:900px){.principle-grid{grid-template-columns:repeat(3,minmax(0,1fr))}} .principle{padding:1.75rem;border:1px solid var(--border);border-radius:calc(var(--radius) * 1.2);background:var(--card);box-shadow:var(--shadow-card);display:grid;gap:1rem;align-content:start} .principle:hover{box-shadow:var(--shadow-window);transform:translateY(-2px)} .pr-head{display:flex;align-items:center;gap:0.75rem} .pr-icon{color:var(--primary)} .pr-icon .icon{width:1.5rem;height:1.5rem} .pr-title{font-size:1.125rem;font-weight:600;font-family:var(--font-heading)} .pr-desc{font-size:0.875rem;line-height:1.8;color:var(--muted-foreground)} .pr-points{list-style:none;margin:0;padding:0;display:grid;gap:0.375rem} .pr-points li{display:flex;gap:0.5rem;font-size:0.8125rem;color:var(--foreground);opacity:0.9} .pr-points li::before{content:"—";color:var(--muted-foreground)} .stack-grid{display:grid;gap:1.5rem} @media (min-width:900px){.stack-grid{grid-template-columns:repeat(3,minmax(0,1fr))}} .stack-card{padding:1.5rem;border:1px solid var(--border);border-radius:calc(var(--radius) * 1.2);background:var(--card);box-shadow:var(--shadow-card);display:grid;gap:1rem;align-content:start} .stack-name{font-size:1rem;font-weight:600;font-family:var(--font-heading);display:flex;align-items:center;gap:0.5rem} .stack-name .icon{color:var(--primary)} .tags{display:flex;flex-wrap:wrap;gap:0.5rem} .tag{padding:0.1875rem 0.625rem;border-radius:9999px;border:1px solid var(--border);background:var(--background);color:var(--foreground);font-family:var(--font-mono);font-size:0.75rem} .theme-showcase{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:1rem} @media (min-width:640px){.theme-showcase{grid-template-columns:repeat(3,minmax(0,1fr))}} @media (min-width:900px){.theme-showcase{grid-template-columns:repeat(7,minmax(0,1fr))}} .theme-card{display:grid;gap:0.5rem;padding:0.875rem;border:1px solid var(--border);border-radius:calc(var(--radius) * 1);background:var(--card);cursor:pointer;text-align:left;font-family:var(--font-sans);color:var(--foreground)} .theme-card:hover{border-color:var(--ring)} .theme-card.active{border-color:var(--primary);box-shadow:0 0 0 2px color-mix(in oklch,var(--primary) 25%,transparent)} .theme-card .t-swatch{height:2.5rem;border-radius:calc(var(--radius) * 0.7);display:flex;align-items:flex-end;gap:0.25rem;padding:0.375rem} .theme-card .t-name{font-size:0.8125rem;font-weight:600;font-family:var(--font-heading)} .theme-card .t-sub{font-size:0.6875rem;color:var(--muted-foreground);font-family:var(--font-mono)} .color-dot{width:0.875rem;height:0.875rem;border-radius:9999px} .colophon{margin-top:4rem;padding:2.5rem 0 3rem;border-top:1px solid var(--border)} .colophon-inner{display:flex;align-items:center;justify-content:space-between;gap:1rem;flex-wrap:wrap} .colophon .wordmark-sm{font-family:var(--font-display);font-size:0.9375rem;opacity:0.6} .colophon .meta{font-family:var(--font-mono);font-size:0.75rem;color:var(--muted-foreground)}