*{box-sizing:border-box}
body{margin:0;font-family:-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Hiragino Sans GB","Microsoft YaHei",sans-serif;color:#1f2937;background:#f8fafc;line-height:1.75}
.wrap{max-width:860px;margin:0 auto;padding:0 20px}
.top{background:#0f172a;color:#fff;padding:14px 0}
.brand{color:#fff;text-decoration:none;font-weight:700;margin-right:12px}
.product{color:#94a3b8;font-size:14px}
.doc{background:#fff;margin:24px auto;padding:28px 24px 40px;border-radius:12px;box-shadow:0 1px 3px rgba(15,23,42,.08)}
h1{font-size:1.6rem;margin:0 0 16px;line-height:1.35}
h2{font-size:1.2rem;margin:28px 0 12px;padding-top:8px;border-top:1px solid #e2e8f0}
h3{font-size:1.05rem;margin:20px 0 10px}
p{margin:10px 0}
ul{margin:10px 0;padding-left:1.4em}
li{margin:6px 0}
strong{font-weight:700}
code{font-family:ui-monospace,Consolas,monospace;font-size:.92em;background:#f1f5f9;padding:1px 6px;border-radius:4px}
table{width:100%;border-collapse:collapse;margin:14px 0;font-size:.95rem}
th,td{border:1px solid #e2e8f0;padding:10px 12px;text-align:left;vertical-align:top}
th{background:#f1f5f9;font-weight:600}
.foot{padding:28px 0 40px;color:#64748b;font-size:14px}
.foot .muted{color:#94a3b8;font-size:13px}
@media (max-width:640px){
  .doc{margin:12px;padding:20px 16px 28px}
  table{display:block;overflow-x:auto}
}