:root{--bg:#f5f6fa;--card:#fff;--text:#1c1b1f;--muted:#666;--accent:#10b981;--link:#1565c0}
@media (prefers-color-scheme:dark){:root{--bg:#0f172a;--card:#1e293b;--text:#f1f5f9;--muted:#94a3b8;--link:#7cb4ff}}
*{box-sizing:border-box}body{margin:0;background:var(--bg);color:var(--text);font:16px/1.55 system-ui,-apple-system,"Segoe UI",Roboto,sans-serif}
main{max-width:720px;margin:0 auto;padding:16px}header{display:flex;align-items:center;gap:10px;padding:8px 0 12px}
header img{width:40px;height:40px;border-radius:10px}header b{font-size:18px}
.card{background:var(--card);border-radius:16px;padding:20px;margin:12px 0;box-shadow:0 1px 3px #0002}
h1{font-size:24px;margin:0 0 4px}h2{font-size:18px;margin:22px 0 6px}p,li{margin:6px 0}ul{padding-left:20px}
.muted{color:var(--muted);font-size:14px}a{color:var(--link)}table{border-collapse:collapse;width:100%;font-size:14px}
td,th{border-bottom:1px solid #8884;padding:8px 6px;text-align:left;vertical-align:top}
.btn{display:inline-block;padding:12px 18px;border-radius:12px;background:var(--accent);color:#06281d;font-weight:600;text-decoration:none}
.code{font:700 26px/1.2 ui-monospace,Menlo,monospace;letter-spacing:3px;background:#10b98122;border-radius:12px;padding:14px;text-align:center;word-break:break-all}
.lang{float:right;font-size:14px}footer{text-align:center;color:var(--muted);font-size:13px;margin:20px 0}