:root{--ink:#0f2526;--muted:#4b5f60;--brand:#0f3d3e;--accent:#1f9d72;--bg:#ffffff;--soft:#f3f7f6;--line:#dbe5e3}
*{box-sizing:border-box}
body{margin:0;font-family:-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,Helvetica,Arial,sans-serif;color:var(--ink);background:var(--bg);line-height:1.6}
a{color:var(--accent)}
.wrap{max-width:960px;margin:0 auto;padding:0 20px}
header{border-bottom:1px solid var(--line)}
header .wrap{display:flex;align-items:center;justify-content:space-between;height:68px;gap:16px}
.brand{display:flex;align-items:center;gap:10px;font-weight:700;color:var(--ink);text-decoration:none;font-size:18px}
.brand img{width:34px;height:34px}
nav a{color:var(--muted);text-decoration:none;margin-left:18px;font-size:15px}
nav a:hover{color:var(--ink)}
.hero{background:var(--soft);padding:64px 0 56px}
.hero h1{font-size:38px;line-height:1.2;margin:0 0 16px;max-width:720px}
.hero p{font-size:18px;color:var(--muted);max-width:680px;margin:0}
section{padding:48px 0;border-bottom:1px solid var(--line)}
h2{font-size:26px;margin:0 0 14px}
h3{font-size:18px;margin:24px 0 6px}
.grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(240px,1fr));gap:18px;margin-top:20px}
.card{border:1px solid var(--line);border-radius:12px;padding:18px 20px;background:#fff}
.card h3{margin-top:0}
ul{padding-left:20px}
li{margin:6px 0}
.note{background:var(--soft);border-left:4px solid var(--accent);padding:14px 18px;border-radius:6px}
table{border-collapse:collapse;width:100%;margin-top:12px;font-size:15px}
th,td{border:1px solid var(--line);padding:8px 10px;text-align:left;vertical-align:top}
th{background:var(--soft)}
footer{padding:32px 0;color:var(--muted);font-size:14px}
footer .wrap{display:flex;flex-wrap:wrap;justify-content:space-between;gap:12px}
.doc h1{font-size:32px;margin:40px 0 4px}
.doc .updated{color:var(--muted);margin-bottom:28px}
@media (max-width:640px){.hero h1{font-size:28px}nav a{margin-left:12px}header .wrap{height:auto;padding:14px 20px;flex-wrap:wrap}}