:root{color-scheme:dark;--bg:#070b14;--surface:#0e1524;--border:#1e293b;--text:#e6edf7;--text-muted:#94a3b8;--accent:#22d3ee;--accent-2:#8b5cf6;--on-accent:#04121a;--gradient:linear-gradient(90deg, var(--accent), var(--accent-2));--font-heading:"Space Grotesk Variable", "Space Grotesk", system-ui, sans-serif;--font-body:"Inter", system-ui, -apple-system, "Segoe UI", sans-serif;--font-zh:"PingFang SC", "Microsoft YaHei", "Noto Sans SC", sans-serif;--font-mono:"JetBrains Mono", ui-monospace, "SFMono-Regular", Menlo, monospace;--fs-hero:64px;--lh-hero:1.1;--fs-h2:40px;--fs-body:17px;--lh-body:1.7;--lh-body-zh:1.8;--fs-small:14px;--max-w:1120px;--pad-x:48px;--section-gap:128px;--nav-h:64px;--radius:16px;--t-fast:.2s;--t-reveal:.5s;--t-hero:.6s;--ease-out:cubic-bezier(.22, 1, .36, 1)}@media (width<=640px){:root{--fs-hero:36px;--fs-h2:28px;--pad-x:20px;--section-gap:72px}}*,:before,:after{box-sizing:border-box}*{margin:0}html{-webkit-text-size-adjust:100%;text-size-adjust:100%;scroll-behavior:smooth;scroll-padding-top:calc(var(--nav-h) + 8px);overflow-x:clip}body{background-color:var(--bg);min-height:100vh;color:var(--text);font-family:var(--font-body);font-size:var(--fs-body);line-height:var(--lh-body);-webkit-font-smoothing:antialiased;background-image:linear-gradient(#e6edf70a 1px,#0000 1px),linear-gradient(90deg,#e6edf70a 1px,#0000 1px);background-size:48px 48px;overflow-x:clip}:lang(zh) body,body:lang(zh){font-family:var(--font-zh);line-height:var(--lh-body-zh)}img,svg,picture,canvas{max-width:100%;display:block}a{color:var(--accent);text-underline-offset:3px;text-decoration-thickness:1px}button{font:inherit;color:inherit}ul[role=list],ol[role=list]{padding:0;list-style:none}@media (prefers-reduced-motion:reduce){html{scroll-behavior:auto}}:focus-visible{outline:2px solid var(--accent);outline-offset:3px;border-radius:4px}h1,h2,h3{font-family:var(--font-heading);letter-spacing:-.01em;text-wrap:balance;font-weight:600;line-height:1.2}:lang(zh) h1,:lang(zh) h2,:lang(zh) h3{font-family:var(--font-zh);letter-spacing:0}h2{font-size:var(--fs-h2)}h3{font-size:20px}p{text-wrap:pretty}.muted{color:var(--text-muted)}.eyebrow{font-family:var(--font-mono);letter-spacing:.08em;color:var(--text-muted);text-transform:uppercase;font-size:13px}.mono{font-family:var(--font-mono)}.gradient-text{background:var(--gradient);color:#0000;-webkit-background-clip:text;background-clip:text}.container{width:100%;max-width:calc(var(--max-w) + 2 * var(--pad-x));padding-inline:var(--pad-x);margin-inline:auto}.section{padding-block:calc(var(--section-gap) / 2)}.section:first-of-type{padding-top:0}.section-head{margin-bottom:40px}.section-head .eyebrow{margin-bottom:12px}.btn{min-height:48px;font-family:var(--font-body);cursor:pointer;transition:background-color var(--t-fast), border-color var(--t-fast), color var(--t-fast), box-shadow var(--t-fast);border:1px solid #0000;border-radius:999px;justify-content:center;align-items:center;gap:8px;padding:12px 22px;font-size:16px;font-weight:600;line-height:1.2;text-decoration:none;display:inline-flex}:lang(zh) .btn{font-family:var(--font-zh)}.btn-primary{background:var(--accent);color:var(--on-accent)}.btn-primary:hover{box-shadow:0 0 24px #22d3ee59}.btn-secondary{border-color:var(--border);color:var(--text);background:0 0}.btn-secondary:hover{border-color:var(--accent);color:var(--accent)}.btn[disabled]{opacity:.6;cursor:not-allowed}.card{background:var(--surface);border:1px solid var(--border);border-radius:var(--radius);transition:border-color var(--t-fast), box-shadow var(--t-fast);padding:28px;position:relative}.card:before{content:"";border-radius:inherit;background:var(--gradient);-webkit-mask-composite:xor;opacity:0;transition:opacity var(--t-fast);pointer-events:none;padding:1px;position:absolute;inset:-1px;-webkit-mask-image:linear-gradient(#000 0 0),linear-gradient(#000 0 0);-webkit-mask-position:0 0,0 0;-webkit-mask-size:auto,auto;-webkit-mask-repeat:repeat,repeat;-webkit-mask-clip:content-box,border-box;-webkit-mask-origin:content-box,border-box;mask-composite:exclude;mask-mode:match-source,match-source}.card:hover:before{opacity:1}.card:hover{box-shadow:0 0 32px #22d3ee14}.tag{border:1px solid var(--border);font-family:var(--font-mono);color:var(--text-muted);border-radius:6px;padding:4px 10px;font-size:13px;display:inline-block}.visually-hidden{clip:rect(0 0 0 0);white-space:nowrap;border:0;width:1px;height:1px;margin:-1px;padding:0;overflow:hidden;position:absolute!important}@media (prefers-reduced-motion:no-preference){.js [data-reveal]{opacity:0;transition:opacity var(--t-reveal) var(--ease-out), transform var(--t-reveal) var(--ease-out);transform:translateY(16px)}.js [data-reveal].is-visible{opacity:1;transform:none}.hero-line{animation:hero-rise var(--t-hero) var(--ease-out) both;animation-delay:calc(var(--i,0) * 80ms)}@keyframes hero-rise{0%{opacity:.01;transform:translateY(16px)}to{opacity:1;transform:none}}.card{transition:border-color var(--t-fast), box-shadow var(--t-fast), transform var(--t-fast) var(--ease-out)}.card:hover{transform:translateY(-2px)}}