:root{--ground:#0F1113;--surface:#1C1E21;--raised:#26292D;--line:rgba(255,255,255,.08);--text:#E8ECEF;--muted:#959FAB;--accent:#52B5D2;--signal:#F2B36B}
*{box-sizing:border-box}
html{color-scheme:dark}
body{margin:0;background:var(--ground);color:var(--text);font:16px/1.75 -apple-system,BlinkMacSystemFont,"PingFang SC","Helvetica Neue","Microsoft YaHei",sans-serif;-webkit-font-smoothing:antialiased}
.wrap{max-width:760px;margin:0 auto;padding:0 20px}
header{border-bottom:1px solid var(--line)}
header .wrap{display:flex;align-items:center;gap:12px;height:64px}
header img{width:32px;height:32px;border-radius:8px}
header a.brand{color:var(--text);font-weight:700;text-decoration:none;font-size:17px}
header nav{margin-left:auto;display:flex;gap:18px;font-size:14px}
header nav a{color:var(--muted);text-decoration:none}
header nav a:hover{color:var(--text)}
main{padding:48px 0 64px}
h1{font-size:34px;line-height:1.25;margin:0 0 8px;letter-spacing:-.01em}
h2{font-size:20px;margin:40px 0 10px}
.sub{color:var(--muted);margin:0 0 28px;font-size:14px}
.card{background:var(--surface);border:1px solid var(--line);border-radius:16px;padding:18px 20px;margin:20px 0}
a{color:var(--accent)}
ul,ol{padding-left:1.3em}
li{margin:6px 0}
table{width:100%;border-collapse:collapse;margin:12px 0;font-size:15px}
td{border-top:1px solid var(--line);padding:10px 8px;vertical-align:top}
td:first-child{white-space:nowrap;color:var(--signal);width:1%;padding-right:18px}
.hero{display:flex;gap:22px;align-items:center;margin-bottom:28px}
.hero img{width:96px;height:96px;border-radius:22px}
.lede{font-size:18px;color:#C9D0D6}
.grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(210px,1fr));gap:12px;margin:24px 0}
.grid .card{margin:0}
.grid h3{margin:0 0 4px;font-size:16px}
.grid p{margin:0;color:var(--muted);font-size:14px;line-height:1.6}
footer{border-top:1px solid var(--line);color:var(--muted);font-size:13px;padding:24px 0 40px}
footer a{color:var(--muted)}
@media (max-width:520px){h1{font-size:28px}.hero{flex-direction:column;align-items:flex-start}header nav{gap:12px}}