@font-face{font-family:IBM Plex Mono;font-style:normal;font-display:swap;font-weight:500;src:url(/assets/ibm-plex-mono-latin-500-normal-DSY6xOcd.woff2) format("woff2"),url(/assets/ibm-plex-mono-latin-500-normal-CB9ihrfo.woff) format("woff")}@font-face{font-family:Newsreader;font-style:normal;font-display:swap;font-weight:600;src:url(/assets/newsreader-latin-600-normal-30OJ_TG_.woff2) format("woff2"),url(/assets/newsreader-latin-600-normal-DUnT2r2g.woff) format("woff")}:root{--night: #0a1a3f;--night-deep: #06112c;--horizon: #2f5fd0;--page: #afc4f4;--starlight: #f4f7ff;--gold: #f2c14e;--bg: #f5f7fc;--bg-elev: #ffffff;--bg-soft: #ebeffa;--ink: #0e1c3d;--ink-2: #33415f;--ink-3: #66728f;--line: #dfe5f3;--line-2: #c9d3ea;--accent: #2652c4;--accent-ink: #1d3f9a;--accent-soft: #e6edfd;--ok: #0f7a5c;--warn: #a35a00;--bad: #c2322b;--code-bg: #0b1734;--code-bar: #101f45;--code-line: #1b2d5c;--code-ink: #dbe4fb;--code-mute: #8597c4;--top: 62px;--side: 272px;--display: "Newsreader", "Songti SC", 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small{font-size:11.5px;color:var(--ink-3);letter-spacing:.02em}.search-btn{margin-left:22px;display:flex;align-items:center;gap:10px;width:300px;max-width:32vw;padding:7px 10px;border-radius:9px;border:1px solid var(--line);background:var(--bg-elev);color:var(--ink-3);font:inherit;font-size:14px;cursor:pointer}.search-btn:hover{border-color:var(--line-2)}.search-btn span{flex:1;text-align:left}kbd{font-size:11px;padding:1px 6px;border-radius:5px;border:1px solid var(--line-2);background:var(--bg-soft);color:var(--ink-3)}.top-links{margin-left:auto;display:flex;align-items:center;gap:4px}.top-links a,.lang-btn{display:flex;align-items:center;gap:6px;padding:6px 10px;border-radius:8px;color:var(--ink-2);font:inherit;font-size:14px}.top-links a:hover,.lang-btn:hover{background:var(--bg-soft);text-decoration:none}.lang-btn{border:1px solid var(--line);background:none;cursor:pointer;margin-left:4px}.icon-btn{display:grid;place-items:center;width:34px;height:34px;border-radius:8px;border:0;background:none;color:var(--ink-2);cursor:pointer}.icon-btn:hover{background:var(--bg-soft)}.mobile{display:none}.layout{display:grid;grid-template-columns:var(--side) minmax(0,1fr)}.side{position:sticky;top:var(--top);height:calc(100vh - var(--top));overflow-y:auto;padding:26px 14px 40px 22px;border-right:1px solid var(--line)}.side-group{margin-bottom:22px}.side-title{font-size:13px;font-weight:600;color:var(--ink);margin:0 0 4px 10px}.side a{position:relative;display:block;padding:4px 10px 4px 22px;margin:1px 0;border-radius:7px;color:var(--ink-2);font-size:14px}.side a.mono{font:12.6px var(--mono);white-space:nowrap;overflow:hidden;text-overflow:ellipsis}.side a:hover{background:var(--bg-soft);text-decoration:none;color:var(--ink)}.side 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51%),radial-gradient(120% 90% at 85% 120%,#1d47b0 0%,#12306f 34%,transparent 62%),linear-gradient(180deg,var(--night-deep),var(--night))}.hero:after{content:"";position:absolute;z-index:-1;left:-10%;right:-10%;bottom:-88%;height:130%;border-radius:50%;border-top:1.5px solid #8fb0ff99;background:radial-gradient(60% 40% at 50% 0%,#3b6ee633,transparent 70%);box-shadow:0 -18px 60px -10px #4a7cf055}.hero-inner{display:grid;grid-template-columns:minmax(0,1fr) auto;gap:28px;align-items:center}.hero h1{color:var(--starlight);font-size:clamp(34px,4.6vw,56px);font-weight:500;line-height:1.08;letter-spacing:-.02em;margin:0 0 18px;max-width:15ch}[lang=zh-CN] .hero h1{max-width:12em;letter-spacing:.01em;line-height:1.2}.lede{font-size:17px;line-height:1.7;color:#c9d6f7;max-width:60ch;margin:0}.lede strong{color:var(--starlight)}.hero-logo{width:clamp(180px,22vw,290px);height:auto;-webkit-mask-image:radial-gradient(closest-side,#000 62%,transparent 100%);mask-image:radial-gradient(closest-side,#000 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a{display:grid;grid-template-columns:30px 1fr;column-gap:10px;padding:16px 0 18px;color:var(--ink)}.abilities a:hover{text-decoration:none}.abilities a:hover .ab-t{text-decoration:underline;text-underline-offset:3px}.ab-icon{grid-row:span 2;color:var(--horizon);padding-top:3px}[data-theme=dark] .ab-icon{color:var(--page)}.ab-t{font-weight:600}.ab-d{color:var(--ink-3);font-size:14px;line-height:1.55}.limit-grid{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:0;margin:8px 0 18px;border:1px solid var(--line);border-radius:12px;background:var(--bg-elev)}.limit{padding:16px 20px;border-left:1px solid var(--line)}.limit:first-child{border-left:0}.limit .stat-n{font:500 28px/1.2 var(--display);color:var(--ink)}.limit .stat-l{font-size:13.5px;color:var(--ink-3)}.doc{padding:56px 0 10px;border-bottom:1px solid var(--line)}.doc>h2{font-size:32px;margin:0 0 14px}.doc h3{font-size:21px;margin:30px 0 8px}.doc h4{font-size:14px;font-weight:600;color:var(--ink);margin:24px 0 10px}.doc 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4px}.flow-wrap{flex:1;min-width:200px;display:flex;align-items:center;gap:10px}.flow-step{flex:1;align-self:stretch;padding:14px 16px;border:1px solid var(--line);border-radius:12px;background:var(--bg-elev);display:flex;flex-direction:column;gap:5px}.flow-step span{width:22px;height:22px;border-radius:50%;font:600 12.5px var(--display);display:grid;place-items:center;background:var(--night);color:var(--starlight)}[data-theme=dark] .flow-step span{background:var(--horizon)}.flow-step code{align-self:flex-start}.flow-step small{color:var(--ink-3);font-size:13px}.flow-arrow{color:var(--ink-3);flex:none}.skill-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:16px;margin:20px 0 22px}.skill-grid.one{grid-template-columns:minmax(0,1fr)!important}.skill{padding:18px;border:1px solid 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