:root{color-scheme:dark;--bg: #11151c;--bg-soft: #151a22;--panel: rgba(25, 31, 40, .72);--panel-solid: #19202a;--panel-2: #1d242e;--border: rgba(154, 167, 186, .16);--border-strong: rgba(154, 167, 186, .28);--text: #dfe4eb;--muted: #a1abb9;--faint: #7d8796;--accent: #9fc3b8;--accent-soft: rgba(159, 195, 184, .12);--violet: #b4bbd4;--violet-soft: rgba(180, 187, 212, .12);--amber: #d5bb87;--red: #d99aa2;--radius: 18px;--radius-sm: 10px;--shadow: 0 22px 60px rgba(0, 0, 0, .28);--font: ui-sans-serif, -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;--mono: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, "Liberation Mono", monospace}*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;font-family:var(--font);color:var(--text);background:radial-gradient(900px 500px at 85% -10%,rgba(180,187,212,.08),transparent 60%),radial-gradient(700px 400px at 0% 10%,rgba(159,195,184,.06),transparent 55%),linear-gradient(180deg,#11151c,#131820 55%,#11151c);line-height:1.65;-webkit-font-smoothing:antialiased}a{color:var(--accent);text-decoration:none}a:hover{text-decoration:underline;text-underline-offset:3px}.skip-link{position:fixed;left:12px;top:-60px;z-index:100;background:var(--accent);color:#18201d;padding:8px 14px;border-radius:8px;font-weight:700;transition:top .15s ease}.skip-link:focus{top:12px}.site-header{position:sticky;top:0;z-index:50;border-bottom:1px solid var(--border);background:#11151cd1;-webkit-backdrop-filter:blur(16px);backdrop-filter:blur(16px)}.shell{width:min(1180px,calc(100% - 48px));margin:0 auto}.header-inner{min-height:68px;display:flex;align-items:center;justify-content:space-between;gap:24px}.brand{display:inline-flex;align-items:center;gap:12px;color:var(--text)}.brand:hover{text-decoration:none}.brand-mark{display:grid;place-items:center;width:36px;height:36px;border-radius:11px;background:linear-gradient(135deg,#a9c9be,var(--violet));color:#161d1a;font-weight:900;font-size:20px;box-shadow:0 8px 22px #9fc3b81f}.brand-copy{display:flex;flex-direction:column;line-height:1.15}.brand-copy strong{font-size:17px;letter-spacing:.02em}.brand-copy small{color:var(--faint);font-size:11px;letter-spacing:.14em;text-transform:uppercase}.site-nav{display:flex;align-items:center;gap:2px}.site-nav a{color:var(--muted);padding:8px 10px;border-radius:9px;font-size:14px;white-space:nowrap}.site-nav a:hover{color:var(--text);background:#ffffff0a;text-decoration:none}.site-nav a[aria-current=page]{color:var(--text);background:var(--panel-2)}.site-nav .nav-github{color:var(--accent);margin-left:8px;border:1px solid var(--border)}.nav-toggle{display:none;border:1px solid var(--border);background:var(--panel);color:var(--text);border-radius:9px;padding:8px 10px;font-size:18px;cursor:pointer}main{padding-bottom:80px}.hero{position:relative;padding:92px 0 48px;overflow:hidden}.hero:before{content:"";position:absolute;inset:-220px -10% auto;height:520px;background:radial-gradient(closest-side,rgba(159,195,184,.06),transparent);pointer-events:none}.eyebrow{display:inline-flex;align-items:center;gap:9px;color:var(--accent);font-size:12px;letter-spacing:.16em;text-transform:uppercase;font-weight:700;margin:0 0 22px}.eyebrow:before{content:"";width:7px;height:7px;border-radius:50%;background:var(--accent);box-shadow:0 0 0 5px #9fc3b81f}.hero h1{margin:0;font-size:clamp(42px,7.2vw,82px);line-height:1.04;letter-spacing:-.045em;max-width:930px}.gradient{background:linear-gradient(100deg,var(--accent),#c4cadd 52%,var(--violet));-webkit-background-clip:text;background-clip:text;color:transparent}.lede{max-width:720px;margin:26px 0 0;color:var(--muted);font-size:18px}.hero-actions{display:flex;flex-wrap:wrap;gap:12px;margin-top:34px}.button{display:inline-flex;align-items:center;justify-content:center;gap:8px;padding:11px 18px;border-radius:10px;border:1px solid var(--border-strong);color:var(--text);background:var(--panel);font-weight:650;font-size:14px}.button:hover{text-decoration:none;border-color:var(--accent);transform:translateY(-1px)}.button.primary{background:linear-gradient(135deg,#aac9be,#b9c6d8);color:#18211e;border-color:transparent}.button.primary:hover{filter:brightness(1.05)}.button.ghost{background:transparent}.hero-stats{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:12px;margin:54px 0 0;padding:0;list-style:none}.hero-stats li{padding:16px 18px;border:1px solid var(--border);border-radius:var(--radius-sm);background:linear-gradient(180deg,#1d242e99,#151a2259)}.hero-stats strong{display:block;font-size:26px;letter-spacing:-.03em}.hero-stats span{color:var(--faint);font-size:12px;letter-spacing:.04em}.section{padding:54px 0 0}.section-head{display:flex;align-items:end;justify-content:space-between;gap:24px;margin-bottom:22px}.kicker{margin:0 0 8px;color:var(--accent);font-size:11px;letter-spacing:.16em;text-transform:uppercase;font-weight:800}.section h2{margin:0;font-size:clamp(26px,3.4vw,36px);letter-spacing:-.03em}.section-intro{color:var(--muted);max-width:680px;margin:8px 0 0}.section-link{color:var(--muted);font-size:13px;white-space:nowrap}.panel{border:1px solid var(--border);border-radius:var(--radius);background:linear-gradient(180deg,#1d242e9e,#131820ad);box-shadow:var(--shadow)}.flow{display:flex;align-items:stretch;gap:10px;padding:22px;overflow-x:auto}.flow-node{flex:1 1 0;min-width:150px;padding:16px;border-radius:12px;background:var(--panel-2);border:1px solid var(--border)}.flow-node .step{display:block;color:var(--faint);font-family:var(--mono);font-size:11px;margin-bottom:7px}.flow-node strong{display:block;font-size:15px}.flow-node code{display:block;margin-top:6px;color:var(--muted);font-size:11px;font-family:var(--mono)}.flow-arrow{align-self:center;color:var(--faint);font-size:18px}.flow-node.accent{border-color:#9fc3b857;background:linear-gradient(180deg,#9fc3b817,#1d242eb3)}.cards{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:14px}.cards.three{grid-template-columns:repeat(3,minmax(0,1fr))}.cards.four{grid-template-columns:repeat(4,minmax(0,1fr))}.card{min-width:0;overflow:hidden;padding:22px;border:1px solid var(--border);border-radius:var(--radius);background:linear-gradient(180deg,#1d242e8c,#151a22b3)}.card h3{margin:0 0 8px;font-size:18px;letter-spacing:-.01em}.card p{margin:0;color:var(--muted);font-size:14px}.card .tag{display:inline-block;margin-bottom:12px;padding:3px 8px;border-radius:999px;background:var(--accent-soft);color:var(--accent);font-family:var(--mono);font-size:11px}.card .tag.violet{background:var(--violet-soft);color:var(--violet)}.card ul{margin:12px 0 0;padding-left:18px;color:var(--muted);font-size:14px}.card li+li{margin-top:5px}.split{display:grid;grid-template-columns:1.1fr .9fr;gap:14px}.stack{display:grid;gap:14px}.pill-row{display:flex;flex-wrap:wrap;gap:8px;margin-top:14px}.pill{display:inline-flex;align-items:center;flex-shrink:0;padding:4px 9px;border:1px solid var(--border);border-radius:999px;color:var(--muted);font-size:11px;font-family:var(--mono);white-space:nowrap}.pill.good{color:var(--accent);border-color:#9fc3b84d;background:var(--accent-soft)}.pill.warn{color:var(--amber);border-color:#d5bb8747;background:#d5bb8717}.table-wrap{overflow-x:auto;border:1px solid var(--border);border-radius:var(--radius);background:#151a2299}table{width:100%;border-collapse:collapse;min-width:640px}th,td{text-align:left;padding:13px 16px;border-bottom:1px solid var(--border);vertical-align:top;font-size:14px}th{color:var(--faint);font-size:11px;letter-spacing:.08em;text-transform:uppercase;font-weight:700;background:#1d242e80}tr:last-child td{border-bottom:0}td code,p code,li code{font-family:var(--mono);font-size:.9em;color:#c4cede;background:#9aa7ba1f;padding:2px 5px;border-radius:5px;overflow-wrap:anywhere}pre{position:relative;margin:16px 0 0;padding:18px 54px 18px 18px;overflow-x:auto;border:1px solid var(--border);border-radius:12px;background:#0f141b;color:#ccd5e1;font-family:var(--mono);font-size:13px;line-height:1.65}pre .comment{color:#727f8f}pre .accent{color:var(--accent)}.callout{display:flex;gap:16px;padding:22px;border:1px solid rgba(159,195,184,.22);border-left:3px solid var(--accent);border-radius:12px;background:linear-gradient(90deg,rgba(159,195,184,.07),transparent 70%)}.callout strong{display:block;margin-bottom:4px}.callout p{margin:0;color:var(--muted);font-size:14px}.page-hero{padding:70px 0 20px}.page-hero h1{margin:0;font-size:clamp(34px,5.4vw,60px);line-height:1.08;letter-spacing:-.04em}.page-hero .lede{margin-top:16px}.stat-strip{display:flex;flex-wrap:wrap;gap:10px 24px;margin-top:24px;color:var(--faint);font-size:13px}.stat-strip strong{color:var(--text)}.page-nav{display:flex;flex-wrap:wrap;align-items:center;gap:8px;margin-top:30px;padding-top:18px;border-top:1px solid var(--border)}.page-nav-label{color:var(--faint);font-family:var(--mono);font-size:11px;letter-spacing:.12em;text-transform:uppercase;margin-right:4px}.page-nav button{border:1px solid var(--border);background:#1d242e8c;color:var(--muted);border-radius:999px;padding:5px 11px;font:500 12px var(--font);cursor:pointer}.page-nav button:hover{color:var(--accent);border-color:#9fc3b866}.section[id]{scroll-margin-top:92px}.sequence{margin:0;padding:6px 22px;list-style:none}.sequence-step{display:grid;grid-template-columns:34px minmax(0,1fr);gap:16px;padding:15px 0;position:relative}.sequence-step+.sequence-step{border-top:1px solid var(--border)}.sequence-index{color:var(--accent);font:700 12px var(--mono);padding-top:3px}.sequence-body{min-width:0}.sequence-head{display:flex;flex-wrap:wrap;align-items:baseline;gap:10px}.sequence-head strong{font-size:15px}.sequence-actor{color:var(--violet);font:600 10px var(--mono);letter-spacing:.06em;text-transform:uppercase;padding:2px 7px;border:1px solid rgba(180,187,212,.26);border-radius:999px;background:var(--violet-soft)}.sequence-body p{margin:5px 0 0;color:var(--muted);font-size:14px;overflow-wrap:anywhere}.sequence-code{display:inline-block;max-width:100%;overflow-wrap:anywhere;white-space:normal;margin-top:8px;color:#c4cede;font:12px var(--mono);background:#9aa7ba1f;padding:3px 7px;border-radius:6px}.callout.warn{border-color:#d5bb8747;border-left-color:var(--amber);background:linear-gradient(90deg,rgba(213,187,135,.08),transparent 70%)}.callout+.callout{margin-top:14px}.callout>div>p+p{margin-top:6px}.callout>div>p a{font-weight:600}.cards .card p+p{margin-top:10px}.cards .card p a{font-weight:600}.mini-mono{font-family:var(--mono);font-size:12px;color:var(--faint)}.devtool-bar{display:flex;align-items:center;justify-content:space-between;gap:16px;margin-bottom:12px;padding:12px 16px;border:1px solid var(--border);border-radius:12px;background:#151a22b8}.devtool-bar-copy{display:flex;flex-wrap:wrap;align-items:center;gap:10px;color:var(--muted);font-size:13px}.devtool-bar-copy strong{color:var(--text);font-size:14px}.devtool-bar-copy code{padding:2px 7px;border-radius:6px;background:var(--accent-soft);color:var(--accent);font:11px var(--mono)}.devtool-dot{width:8px;height:8px;border-radius:50%;background:var(--accent);box-shadow:0 0 0 4px #9fc3b81f}.devtool-frame{position:relative;height:min(84vh,900px);min-height:680px;overflow:hidden;border:1px solid var(--border);border-radius:var(--radius);background:#10151c;box-shadow:var(--shadow)}.devtool-frame iframe{display:block;width:100%;height:100%;border:0}@media (max-width: 1180px){.site-nav a{padding:7px;font-size:13px}}footer{border-top:1px solid var(--border);padding:30px 0 40px;color:var(--faint);font-size:13px}.footer-inner{display:flex;flex-wrap:wrap;justify-content:space-between;gap:16px}.footer-links{display:flex;flex-wrap:wrap;gap:16px}@media (max-width: 900px){.hero-stats,.cards.three,.cards.four{grid-template-columns:repeat(2,minmax(0,1fr))}.split{grid-template-columns:1fr}.flow{flex-wrap:wrap}.flow-arrow{display:none}.flow-node{min-width:calc(50% - 10px)}.devtool-frame{height:78vh;min-height:600px}}@media (max-width: 720px){.shell{width:min(100% - 32px,1180px)}.nav-toggle{display:inline-flex}.site-nav{display:none;position:absolute;left:16px;right:16px;top:64px;padding:10px;flex-direction:column;align-items:stretch;border:1px solid var(--border);border-radius:14px;background:#151a22;box-shadow:var(--shadow)}.site-nav.open{display:flex}.site-nav .nav-github{margin-left:0}.hero{padding-top:62px}.cards,.cards.three,.cards.four{grid-template-columns:1fr}.hero-stats{grid-template-columns:1fr 1fr}.section-head{flex-direction:column;align-items:flex-start;gap:8px}.flow-node{min-width:100%}.devtool-bar{flex-direction:column;align-items:flex-start}.devtool-frame{height:70vh;min-height:520px}.footer-inner{flex-direction:column}}@media (prefers-reduced-motion: reduce){html{scroll-behavior:auto}*{transition:none!important}}pre .copy-code{position:absolute;top:9px;right:9px;border:1px solid var(--border);border-radius:7px;background:#19202a;color:var(--muted);font:600 11px var(--font);padding:4px 8px;cursor:pointer}pre .copy-code:hover{color:var(--accent);border-color:var(--accent)}.card .tag.warn{background:#d5bb871a;color:var(--amber)}.split>*,.stack>*{min-width:0}pre{max-width:100%}