:root{--bg:#f6f6f8;--card:#fff;--text:#1d1d1f;--muted:#6e6e73;--line:rgba(0,0,0,.08);--accent:#0088ff;--btn:#1d1d1f;--btn-text:#fff}
@media(prefers-color-scheme:dark){:root{--bg:#111114;--card:#1c1c21;--text:#f5f5f7;--muted:#98989d;--line:rgba(255,255,255,.1);--btn:#f5f5f7;--btn-text:#111}}
*{box-sizing:border-box}html{-webkit-text-size-adjust:100%}
body{margin:0;background:var(--bg);color:var(--text);font:16px/1.6 -apple-system,BlinkMacSystemFont,"PingFang SC","Helvetica Neue","Microsoft YaHei",sans-serif}
a{color:var(--accent);text-decoration:none}a:hover{text-decoration:underline}
.wrap{max-width:960px;margin:0 auto;padding:0 20px}
header{padding:40px 0 8px}header h1{font-size:28px;margin:0 0 6px;letter-spacing:-.01em}header p{color:var(--muted);margin:0}
.grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(280px,1fr));gap:16px;padding:24px 0 40px}
.card{background:var(--card);border:1px solid var(--line);border-radius:18px;padding:20px;display:flex;flex-direction:column;gap:12px}
.card .head{display:flex;gap:14px;align-items:center}.card img{width:56px;height:56px;border-radius:14px;flex:none}
.card h2{font-size:17px;margin:0}.card .sub{font-size:13px;color:var(--muted);margin:2px 0 0}
.card p{margin:0;font-size:14px;color:var(--muted)}
.dl{display:flex;flex-wrap:wrap;gap:8px;margin-top:auto;padding-top:4px}
.btn{display:inline-flex;align-items:center;gap:6px;padding:8px 14px;border-radius:999px;font-size:14px;font-weight:500;background:var(--btn);color:var(--btn-text);border:1px solid transparent}
.btn:hover{text-decoration:none;opacity:.88}.btn.ghost{background:transparent;color:var(--text);border-color:var(--line)}
.note{font-size:12px;color:var(--muted)}
footer{border-top:1px solid var(--line);padding:24px 0 40px;font-size:13px;color:var(--muted)}footer p{margin:4px 0}footer a{color:var(--muted)}
footer .beian img{width:14px;height:14px;vertical-align:-2px;margin-right:4px}
article{padding:24px 0 48px;max-width:720px}article h1{font-size:26px}article h2{font-size:18px;margin-top:28px}article p,article li{font-size:15px}
nav.top{font-size:14px;padding-top:24px}nav.top a{color:var(--muted)}