:root{--bg:#f6f7f9;--card:#fff;--text:#14161a;--muted:#5b6270;--line:#e3e6ec;--brand:#2f7cf6;--brand-ink:#fff}
@media (prefers-color-scheme:dark){:root{--bg:#0b0c0e;--card:#16181c;--text:#eef0f3;--muted:#9aa1ad;--line:#262a31;--brand:#5a9bff;--brand-ink:#06111f}}
*{box-sizing:border-box}html{-webkit-text-size-adjust:100%}
body{margin:0;background:var(--bg);color:var(--text);font:16px/1.65 -apple-system,BlinkMacSystemFont,"PingFang SC","Hiragino Sans GB","Segoe UI",Roboto,"Noto Sans SC",sans-serif}
a{color:var(--brand)}
.wrap{max-width:820px;margin:0 auto;padding:0 20px}
header{border-bottom:1px solid var(--line);background:var(--card)}
.bar{display:flex;align-items:center;gap:16px;min-height:60px;flex-wrap:wrap}
.brand{display:flex;align-items:center;gap:10px;font-weight:700;font-size:18px;color:var(--text);text-decoration:none}
.brand img{width:32px;height:32px;border-radius:8px}
nav{display:flex;gap:14px;flex-wrap:wrap;margin-left:auto}
nav a{color:var(--muted);text-decoration:none;font-size:15px}nav a[aria-current=page]{color:var(--text);font-weight:600}
main{padding:36px 0 56px}
h1{font-size:30px;line-height:1.25;margin:0 0 12px}h2{font-size:20px;margin:32px 0 10px}h3{font-size:17px;margin:20px 0 6px}
.lead{font-size:18px;color:var(--muted);margin:0 0 28px}
.hero{display:flex;gap:24px;align-items:center;flex-wrap:wrap;margin-bottom:12px}.hero img{width:96px;height:96px;border-radius:22px}
.hero div{flex:1;min-width:240px}
.cards{display:grid;grid-template-columns:repeat(auto-fit,minmax(220px,1fr));gap:14px;margin:8px 0 28px}
.card{background:var(--card);border:1px solid var(--line);border-radius:14px;padding:18px}.card h3{margin-top:0}.card p{margin:0;color:var(--muted)}
.qa{background:var(--card);border:1px solid var(--line);border-radius:14px;padding:6px 18px 14px;margin:10px 0}
.qa p{margin:0;color:var(--muted)}
.btn{display:inline-block;background:var(--brand);color:var(--brand-ink);padding:11px 20px;border-radius:999px;text-decoration:none;font-weight:600}
.updated{color:var(--muted);font-size:14px;margin:-4px 0 18px}
ul{padding-left:20px}li{margin:6px 0}
footer{border-top:1px solid var(--line);padding:22px 0;color:var(--muted);font-size:14px}
footer .wrap{display:flex;gap:16px;flex-wrap:wrap}footer a{color:var(--muted)}
footer .right{margin-left:auto}
@media (max-width:420px){.bar{gap:10px}nav{gap:10px}nav a{font-size:14px}h1{font-size:26px}}