:root{--indigo:#4f46e5;--ink:#111827;--muted:#6b7280;--line:#e5e7eb;--maxw:800px}
*{box-sizing:border-box}
body{margin:0;font-family:-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,Helvetica,Arial,sans-serif;color:var(--ink);line-height:1.7;background:#fff}
a{color:var(--indigo)}
.wrap{max-width:var(--maxw);margin:0 auto;padding:0 20px}
header{border-bottom:1px solid var(--line)}
.nav{display:flex;align-items:center;justify-content:space-between;height:64px}
.logo{display:flex;align-items:center;gap:9px;font-weight:800;font-size:19px;color:var(--ink);text-decoration:none}
.logo .mark{width:30px;height:30px;border-radius:8px;background:var(--indigo);color:#fff;display:grid;place-items:center;font-size:18px}
main{padding:48px 0 64px}
h1{font-size:34px;letter-spacing:-.02em;margin:0 0 6px}
.updated{color:var(--muted);font-size:14px;margin-bottom:32px}
h2{font-size:21px;margin:34px 0 8px;letter-spacing:-.01em}
h3{font-size:17px;margin:22px 0 6px}
p,li{color:#374151}
table{border-collapse:collapse;width:100%;margin:14px 0;font-size:15px}
th,td{border:1px solid var(--line);padding:10px 12px;text-align:left;vertical-align:top}
th{background:#f9fafb}
.box{border:1px solid var(--line);border-radius:12px;padding:16px 20px;background:#f9fafb;margin:16px 0}
footer{border-top:1px solid var(--line);padding:30px 0;color:var(--muted);font-size:14px}
footer a{color:var(--muted);margin-right:16px}
.back{display:inline-block;margin-bottom:20px;color:var(--muted);text-decoration:none;font-size:14px}

.logo img{width:28px;height:28px;display:block;border-radius:7px}