:root{color-scheme:light;--paper:#f6f7f3;--ink:#142e2a;--muted:#50645f;--line:#d6e0d9;--green:#126147;--pale:#e8f1e7;--red:#9b382d;--amber:#8a5a13}
*{box-sizing:border-box}body{margin:0;background:var(--paper);color:var(--ink);font:16px/1.6 system-ui,-apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif}a{color:var(--green);text-underline-offset:3px}a:hover{text-decoration-thickness:2px}a:focus-visible{outline:3px solid #367660;outline-offset:5px}main,header,footer{max-width:1120px;margin:auto;padding-left:32px;padding-right:32px}header{display:flex;align-items:center;justify-content:space-between;gap:20px;padding-top:28px;padding-bottom:28px;border-bottom:1px solid var(--line)}.brand{font-weight:750;text-decoration:none;color:var(--ink);letter-spacing:-.5px}.brand span{display:inline-grid;place-items:center;background:var(--ink);color:#e5faed;width:34px;height:34px;font-size:12px;border-radius:9px;margin-right:10px}nav{display:flex;gap:24px;align-items:center;font-size:14px}.eyebrow{font-size:12px;font-weight:750;letter-spacing:1.6px;text-transform:uppercase;color:var(--green)}.hero{padding:68px 0 48px;max-width:830px}h1{font-size:clamp(34px,5.2vw,60px);line-height:1.12;letter-spacing:-2.4px;margin:16px 0 22px;font-weight:750}h2{font-size:27px;line-height:1.2;letter-spacing:-.6px;margin:0 0 18px}h3{font-size:21px;letter-spacing:-.35px;margin:12px 0}p{margin:0 0 16px}.lead{font-size:20px;line-height:1.6;color:var(--muted);max-width:760px}.quiet{color:var(--muted);font-size:14px}.samples{display:grid;grid-template-columns:1fr 1fr;gap:22px;margin:0 0 20px}.card{display:flex;flex-direction:column;background:white;border:1px solid var(--line);padding:30px;border-radius:16px}.label{font-size:11px;font-weight:750;letter-spacing:1.2px;text-transform:uppercase;color:var(--muted)}.counts{display:flex;flex-wrap:wrap;gap:26px;padding:20px 0;margin-bottom:20px;border-top:1px solid var(--line);border-bottom:1px solid var(--line)}.counts strong{display:block;font-size:36px;line-height:1.2;letter-spacing:-1px}.counts span{font-size:13px;color:var(--muted)}.error{color:var(--red)}.warning{color:var(--amber)}.good{color:var(--green)}.card p{color:var(--muted)}.actions{display:flex;gap:20px;align-items:center;flex-wrap:wrap;margin-top:auto;padding-top:10px}.button{display:inline-block;background:var(--green);color:#fff;border:1px solid var(--green);padding:11px 18px;text-decoration:none;border-radius:7px;font-weight:650;font-size:14px}.button:hover{background:#0d4b36}.button.secondary{background:white;color:var(--green)}.button.secondary:hover{background:var(--pale)}.section{padding:40px 0;border-top:1px solid var(--line);margin-top:36px}.split{display:grid;grid-template-columns:1fr 1fr;gap:42px}.section ul{padding-left:20px;color:var(--muted)}li{margin-bottom:8px}code{font-family:ui-monospace,SFMono-Regular,Consolas,monospace;font-size:.88em}pre{overflow:auto;background:#17382e;color:#e4f5e6;padding:24px;border-radius:12px;font-size:13px;line-height:1.8;tab-size:2}pre code{font-size:inherit}.note{border-left:3px solid #9bbca8;padding:4px 0 4px 16px;color:var(--muted);font-size:14px}.linkrow{display:flex;flex-wrap:wrap;gap:12px 24px;font-size:14px}footer{padding-top:30px;padding-bottom:35px;border-top:1px solid var(--line);display:flex;gap:25px;justify-content:space-between;font-size:12px;color:var(--muted)}footer p{margin:0}html[lang="zh-CN"] h1{letter-spacing:-1.5px;line-height:1.3}html[lang="zh-CN"] .lead{font-size:18px}.skip{position:absolute;top:-80px;left:20px;background:white;padding:8px}.skip:focus{top:8px}
@media(max-width:720px){main,header,footer{padding-left:20px;padding-right:20px}header{align-items:flex-start;padding-top:20px;padding-bottom:20px;gap:16px}.brand{font-size:14px;white-space:nowrap}.brand span{display:none}nav{gap:15px;font-size:13px}.hero{padding:42px 0 28px}h1{letter-spacing:-1.2px}.lead{font-size:17px}.samples,.split{grid-template-columns:1fr;gap:18px}.card{padding:24px}.section{padding:30px 0;margin-top:28px}.counts{gap:25px}footer{flex-direction:column;gap:12px}pre{padding:18px;font-size:12px}.quiet{font-size:13px}}