:root{--blue:#1456f0;--ink:#172033;--muted:#64748b;--bg:#f6f8fc;--card:#fff;--line:#e6ebf2;--code:#0f172a;--soft:#edf4ff}*{box-sizing:border-box}body{margin:0;background:var(--bg);color:var(--ink);font-family:-apple-system,BlinkMacSystemFont,"Segoe UI","Microsoft YaHei",Arial,sans-serif;line-height:1.72}.wrap{max-width:1180px;margin:0 auto;padding:0 22px}.top{position:sticky;top:0;z-index:5;background:rgba(255,255,255,.92);backdrop-filter:blur(14px);border-bottom:1px solid var(--line)}.nav{display:flex;align-items:center;justify-content:space-between;gap:18px;min-height:64px}.brand{font-weight:800;font-size:20px;color:var(--ink);text-decoration:none}.links{display:flex;gap:8px;flex-wrap:wrap}.links a{color:#334155;text-decoration:none;padding:8px 11px;border-radius:999px;font-size:14px}.links a:hover,.links a.active{background:var(--soft);color:var(--blue)}.hero{padding:54px 0 30px}.hero h1{font-size:38px;line-height:1.18;margin:0 0 14px}.hero p{max-width:760px;color:var(--muted);font-size:17px}.grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(245px,1fr));gap:16px}.card{background:var(--card);border:1px solid var(--line);border-radius:20px;padding:22px;box-shadow:0 10px 30px rgba(15,23,42,.04)}.card h3{margin:0 0 8px}.card p{color:var(--muted);margin:0 0 14px}.btn{display:inline-flex;align-items:center;gap:6px;background:var(--blue);color:#fff!important;text-decoration:none;border-radius:12px;padding:9px 14px;font-weight:650}.section{background:var(--card);border:1px solid var(--line);border-radius:20px;padding:24px;margin:18px 0}.section h2{margin-top:0;color:#0f172a}.section h3{margin-bottom:6px}code{background:#eef2f7;border-radius:7px;padding:2px 6px;color:#0f172a}pre{background:#0b1220;color:#dbeafe;border-radius:16px;padding:18px;overflow:auto;line-height:1.55}pre code{background:transparent;color:inherit;padding:0}.table{width:100%;border-collapse:collapse;overflow:hidden;border-radius:14px}.table th,.table td{border-bottom:1px solid var(--line);padding:11px;text-align:left;vertical-align:top}.table th{background:#f8fafc}.tag{display:inline-block;border-radius:999px;padding:2px 9px;background:#dcfce7;color:#166534;font-size:12px;font-weight:700}.warn{background:#fff7ed;border:1px solid #fed7aa;border-radius:16px;padding:14px;color:#9a3412}.foot{padding:32px 0;color:var(--muted);text-align:center}.toc{display:flex;gap:8px;flex-wrap:wrap;margin:10px 0 0}.toc a{background:#fff;border:1px solid var(--line);border-radius:999px;padding:6px 10px;text-decoration:none;color:#334155;font-size:13px}@media(max-width:720px){.hero h1{font-size:30px}.nav{align-items:flex-start;flex-direction:column;padding:12px 0}.links{padding-bottom:10px}}