:root{--bg:#0b0e14;--side:#10141d;--panel:#151a24;--panel2:#1b2230;--line:#293142;--text:#e8edf5;--muted:#9aa7b8;--blue:#65a8ff;--cyan:#55d6be;--violet:#a78bfa;--orange:#f3b36a;--red:#ef7b85;--radius:10px;--sidebar:232px}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{margin:0;background:var(--bg);color:var(--text);font:16px/1.7 "Segoe UI","Microsoft YaHei",sans-serif}
a{color:var(--blue);text-decoration:none}
a:hover{text-decoration:underline}
a:focus-visible,button:focus-visible,summary:focus-visible{outline:3px solid var(--cyan);outline-offset:3px}
img{display:block;max-width:100%;height:auto}
.skip{position:fixed;left:-999px;top:8px;z-index:100;background:#fff;color:#111;padding:8px 14px;border-radius:5px}
.skip:focus{left:8px}
.app{min-height:100vh;display:grid;grid-template-columns:var(--sidebar) minmax(0,1fr)}
.activity{position:fixed;inset:0 auto 0 0;width:48px;background:#080b10;border-right:1px solid var(--line);display:flex;flex-direction:column;align-items:center;padding:15px 0;z-index:30}
.activity a{width:48px;height:48px;display:grid;place-items:center;color:#69778b;font:18px Consolas,monospace;border-left:2px solid transparent}
.activity a:hover,.activity a.active{color:#fff;border-left-color:var(--blue);background:#121824;text-decoration:none}
.activity .bottom{margin-top:auto}
.sidebar{position:fixed;left:48px;top:0;bottom:24px;width:calc(var(--sidebar) - 48px);background:var(--side);border-right:1px solid var(--line);padding:18px 10px;z-index:20;overflow:auto}
.wordmark{display:flex;align-items:center;gap:9px;padding:0 8px 14px;color:var(--text);font-weight:700}
.wordmark:hover{text-decoration:none}
.wordmark img{width:31px;height:31px;border-radius:7px}
.explorer-title,.folder{font:11px/1.4 Consolas,monospace;text-transform:uppercase;letter-spacing:.09em;color:#78869a;padding:9px 8px}
.folder{color:#c0cad7;padding-bottom:4px}
.tree{display:grid}
.tree a{padding:7px 8px 7px 20px;color:#aeb9c8;font:13px/1.35 Consolas,monospace;border-radius:4px}
.tree a::before{content:"◇";color:var(--violet);margin-right:8px}
.tree a:hover,.tree a[aria-current=page]{background:#202838;color:#fff;text-decoration:none}
.workspace{grid-column:2;min-width:0;padding-bottom:24px}
.titlebar{height:42px;display:flex;align-items:center;justify-content:space-between;border-bottom:1px solid var(--line);padding:0 3vw;background:#0d1118;position:sticky;top:0;z-index:16}
.mobile-toggle{display:none;background:transparent;border:1px solid var(--line);border-radius:5px;color:var(--text);padding:4px 8px}
.crumb{font:12px Consolas,monospace;color:#7f8da0}
.topnav{display:flex;gap:18px;font-size:13px}
.topnav a{color:#a9b5c4}
.tabs{height:39px;display:flex;align-items:stretch;background:#0e1219;border-bottom:1px solid var(--line);position:sticky;top:42px;z-index:15;overflow:auto}
.tabs a{padding:9px 18px;border-right:1px solid var(--line);color:#8997aa;font:12px Consolas,monospace;white-space:nowrap}
.tabs a::before{content:"<>";color:var(--orange);margin-right:8px}
.tabs a.active{background:var(--bg);color:#fff;border-top:1px solid var(--blue)}
.tabs a:hover{text-decoration:none;color:#fff}
.wrap{width:min(1120px,91%);margin-inline:auto}
.hero{padding:72px 0 58px;background:radial-gradient(circle at 78% 10%,rgba(62,100,160,.22),transparent 35%)}
.hero-grid{display:grid;grid-template-columns:1fr 1.05fr;gap:48px;align-items:center}
.syntax{font:13px Consolas,monospace;color:var(--muted)}
.syntax .key{color:var(--violet)}.syntax .str{color:var(--cyan)}.syntax .num{color:var(--orange)}
h1{font-size:clamp(38px,5.4vw,66px);line-height:1.08;letter-spacing:-.045em;margin:17px 0}
h2{font-size:clamp(27px,3.4vw,41px);line-height:1.2;letter-spacing:-.025em;margin:7px 0 12px}
h3{line-height:1.35;margin:0 0 8px}
.lead{font-size:18px;color:#bac5d4;max-width:680px}
.actions,.pills{display:flex;flex-wrap:wrap;gap:11px;margin:25px 0}
.btn{display:inline-flex;align-items:center;justify-content:center;border:1px solid #374259;background:#171e2a;border-radius:6px;color:#dde6f1;padding:10px 17px;font-weight:650}
.btn:hover{background:#202a3a;text-decoration:none}
.btn.primary{background:#2878d4;border-color:#418ee7;color:#fff}
.btn.primary:hover{background:#3287e4}
.pills span,.tag{font:12px Consolas,monospace;border:1px solid var(--line);border-radius:999px;color:#9facbd;padding:4px 10px;background:#111722}
.preview{border:1px solid #354157;border-radius:9px;overflow:hidden;background:#101722;box-shadow:0 22px 55px rgba(0,0,0,.35)}
.preview-bar{height:38px;display:flex;align-items:center;gap:7px;padding:0 12px;border-bottom:1px solid var(--line);font:11px Consolas,monospace;color:#8492a5}
.dot{width:9px;height:9px;border-radius:50%;background:var(--red)}.dot:nth-child(2){background:var(--orange)}.dot:nth-child(3){background:var(--cyan)}
.preview-bar span:last-child{margin-left:7px}
.preview img{width:880px;aspect-ratio:880/700;object-fit:cover}
section{padding:68px 0}
.shade{background:#0f141c;border-block:1px solid var(--line)}
.section-head{display:flex;justify-content:space-between;gap:30px;align-items:end;margin-bottom:27px}
.eyebrow{font:12px Consolas,monospace;color:var(--cyan);letter-spacing:.07em}
.section-head p,.muted,.card p{color:var(--muted)}
.grid{display:grid;gap:17px}.grid-4{grid-template-columns:repeat(4,1fr)}.grid-3{grid-template-columns:repeat(3,1fr)}.grid-2{grid-template-columns:repeat(2,1fr)}
.card{background:var(--panel);border:1px solid var(--line);border-radius:var(--radius);padding:22px}
.card:hover{border-color:#44536e}
.card .file{font:12px Consolas,monospace;color:var(--violet);margin-bottom:17px}
.card a.stretch{display:block;margin-top:13px}
.codeblock{background:#080b10;border:1px solid var(--line);border-radius:8px;padding:18px;overflow:auto;font:14px/1.75 Consolas,monospace;color:#b3bfce}
.codeblock .line{display:block}.codeblock .line::before{content:attr(data-n);display:inline-block;width:32px;color:#4f5c6d;user-select:none}
.codeblock .comment{color:#748398}.codeblock .fn{color:var(--blue)}.codeblock .value{color:var(--cyan)}.codeblock .type{color:var(--violet)}
.split{display:grid;grid-template-columns:280px 1fr;gap:40px;align-items:start}
.outline{position:sticky;top:100px;border:1px solid var(--line);border-radius:8px;background:var(--panel);padding:10px}
.outline a{display:block;padding:8px 10px;color:#99a7b8}
.article>article{padding-bottom:34px;margin-bottom:34px;border-bottom:1px solid var(--line)}
.checks{padding:0;list-style:none}.checks li{margin:8px 0;color:var(--muted)}.checks li::before{content:"✓";color:var(--cyan);margin-right:9px}
.platform{display:flex;align-items:center;justify-content:space-between;gap:16px}
.platform strong{font-size:19px}.platform p{margin:3px 0}
.recommended{border-color:#397ec7;position:relative}.recommended::after{content:"推荐";position:absolute;right:16px;top:15px;color:var(--cyan);font:12px Consolas,monospace}
.steps{counter-reset:steps}.step{position:relative;padding-left:64px;margin:0 0 35px}.step::before{counter-increment:steps;content:counter(steps);position:absolute;left:0;top:0;width:39px;height:39px;display:grid;place-items:center;border:1px solid var(--blue);border-radius:7px;color:var(--blue);font:17px Consolas,monospace}
details{border:1px solid var(--line);background:var(--panel);border-radius:8px;padding:15px 17px;margin:10px 0}
summary{cursor:pointer;font-weight:650}
details p{color:var(--muted)}
.cta{padding:36px;border:1px solid #35628e;border-radius:12px;background:linear-gradient(120deg,#13243a,#181d2a);display:flex;align-items:center;justify-content:space-between;gap:25px}
.cta h2{font-size:29px}
footer{padding:46px 0 26px;border-top:1px solid var(--line);background:#080b10}
.footer-grid{display:grid;grid-template-columns:1.5fr repeat(3,1fr);gap:32px}
.footer-grid h3{font-size:14px}.footer-grid a{display:block;color:#8f9caf;margin:6px 0}.footer-grid p{color:#768397;font-size:13px}
.legal{display:flex;justify-content:space-between;gap:20px;border-top:1px solid var(--line);margin-top:30px;padding-top:18px;color:#6f7d90;font-size:12px}
.statusbar{position:fixed;left:0;right:0;bottom:0;height:24px;background:#1767ae;color:#fff;z-index:50;display:flex;align-items:center;justify-content:space-between;padding:0 12px;font:11px Consolas,monospace}
.statusbar span{margin-right:13px}
@media(max-width:960px){:root{--sidebar:48px}.sidebar{transform:translateX(-110%);transition:.2s transform;width:235px;bottom:24px}.sidebar.open{transform:translateX(0)}.mobile-toggle{display:block}.hero-grid,.split{grid-template-columns:1fr}.grid-4{grid-template-columns:repeat(2,1fr)}.preview{max-width:680px}.outline{position:static}.topnav{display:none}}
@media(max-width:650px){.activity{display:none}.app{display:block}.workspace{padding-bottom:24px}.sidebar{left:0}.titlebar{padding-inline:4.5%}.hero{padding-top:50px}.grid-4,.grid-3,.grid-2,.footer-grid{grid-template-columns:1fr}.section-head,.cta,.legal{align-items:flex-start;flex-direction:column}.topnav{display:none}.tabs a{padding-inline:12px}.statusbar .hide-mobile{display:none}}