:root{--red:#cf3a23;--red-dark:#b02d1b;--ink:#1a2332;--muted:#5b6675;--line:#e7e9ec;--bg:#fff;--code:#f5f7f9;--side:#fafbfc}
*{box-sizing:border-box}
html,body{margin:0;padding:0;background:var(--bg);color:var(--ink);font-family:-apple-system,BlinkMacSystemFont,"Segoe UI",Inter,Roboto,Helvetica,Arial,sans-serif;line-height:1.65;font-size:16px}
a{color:var(--red);text-decoration:none}a:hover{text-decoration:underline}
.topbar{position:sticky;top:0;z-index:50;display:flex;align-items:center;gap:24px;height:62px;padding:0 24px;background:#fff;border-bottom:1px solid var(--line)}
.brand{display:flex;align-items:center;height:100%}.brand img{height:34px;width:auto}
.search{flex:1;max-width:420px;height:38px;padding:0 14px;border:1px solid var(--line);border-radius:8px;font-size:14px;outline:none}
.search:focus{border-color:var(--red);box-shadow:0 0 0 3px rgba(207,58,35,.12)}
.topnav{margin-left:auto;display:flex;gap:20px;font-size:14px;font-weight:600}
.topnav a{color:var(--ink)}.topnav a:hover{color:var(--red);text-decoration:none}
.layout{display:flex;max-width:1280px;margin:0 auto;align-items:flex-start}
.sidebar{width:268px;flex:none;position:sticky;top:62px;height:calc(100vh - 62px);overflow-y:auto;padding:26px 18px;background:var(--side);border-right:1px solid var(--line)}
.sidebar .grp{margin-bottom:22px}
.sidebar .grp h4{margin:0 0 8px;font-size:12px;letter-spacing:.08em;text-transform:uppercase;color:var(--muted)}
.sidebar a{display:block;padding:6px 10px;border-radius:7px;color:var(--ink);font-size:14.5px}
.sidebar a:hover{background:#f0e6e3;text-decoration:none}
.sidebar a.active{background:var(--red);color:#fff;font-weight:600}
.content{flex:1;min-width:0;padding:36px 48px 80px;max-width:860px}
.content h1{font-size:34px;margin:.2em 0 .4em;letter-spacing:-.01em}
.content h2{font-size:23px;margin:1.8em 0 .6em;padding-bottom:.3em;border-bottom:1px solid var(--line)}
.content h3{font-size:18px;margin:1.4em 0 .4em}
.content p,.content li{color:#2a3340}
.crumb{font-size:13px;color:var(--muted);margin-bottom:6px}
code{background:var(--code);padding:2px 6px;border-radius:5px;font-family:"SFMono-Regular",Consolas,Menlo,monospace;font-size:.88em;color:#9e2418}
pre{background:#0f1722;color:#e6edf3;padding:16px 18px;border-radius:10px;overflow-x:auto;line-height:1.5}
pre code{background:none;color:inherit;padding:0}
.note{border-left:4px solid var(--red);background:#fcf0ee;padding:12px 16px;border-radius:0 8px 8px 0;margin:18px 0}
.note.warn{border-color:#d9821a;background:#fdf3e6}
table{border-collapse:collapse;width:100%;margin:16px 0;font-size:14.5px}
th,td{border:1px solid var(--line);padding:9px 12px;text-align:left}th{background:var(--side)}
.cards{display:grid;grid-template-columns:repeat(auto-fit,minmax(220px,1fr));gap:16px;margin:24px 0}
.card{border:1px solid var(--line);border-radius:12px;padding:18px 20px;transition:.15s}
.card:hover{border-color:var(--red);box-shadow:0 6px 20px rgba(207,58,35,.08)}
.card h3{margin:0 0 6px}.card p{margin:0;color:var(--muted);font-size:14px}
.hero{background:linear-gradient(160deg,#fff 55%,#fbe9e6);border:1px solid var(--line);border-radius:16px;padding:40px 44px;margin-bottom:8px}
.hero h1{margin:0 0 8px}.hero p{font-size:18px;color:var(--muted);max-width:620px}
.foot{border-top:1px solid var(--line);padding:24px 48px;color:var(--muted);font-size:13.5px;max-width:1280px;margin:0 auto}
.next{display:flex;justify-content:space-between;margin-top:48px;gap:16px}
.next a{flex:1;border:1px solid var(--line);border-radius:10px;padding:14px 18px;color:var(--ink)}
.next a:hover{border-color:var(--red);text-decoration:none}
.next span{display:block;font-size:12px;color:var(--muted)}
@media(max-width:860px){.sidebar{display:none}.content{padding:24px}}