:root{--bg:#f6f8fb;--card:#fff;--text:#0f172a;--sub:#475569;--line:#e2e8f0;--accent:#0f7fd6;--accent2:#12c4a8}
@media (prefers-color-scheme:dark){:root{--bg:#0b1220;--card:#111a2b;--text:#e5edf7;--sub:#9fb0c6;--line:#1f2b40;--accent:#4aa8f0;--accent2:#2ad4b8}}
*{box-sizing:border-box}
body{margin:0;background:var(--bg);color:var(--text);font:16px/1.6 -apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,Helvetica,Arial,sans-serif}
.wrap{max-width:820px;margin:0 auto;padding:40px 20px 64px}
header{display:flex;align-items:center;gap:18px;margin-bottom:28px}
header img{width:72px;height:72px;border-radius:17px;box-shadow:0 6px 20px rgba(15,127,214,.25)}
h1{font-size:2rem;line-height:1.2;margin:0}
.tag{color:var(--sub);margin:4px 0 0}
.card{background:var(--card);border:1px solid var(--line);border-radius:18px;padding:24px 26px;margin:18px 0}
h2{font-size:1.25rem;margin:0 0 10px}
ul{margin:8px 0 0;padding-left:20px}li{margin:6px 0}
p{margin:8px 0}.sub{color:var(--sub)}
code{background:rgba(127,127,127,.12);padding:1px 6px;border-radius:6px;font-size:.92em}
a{color:var(--accent)}
.btn{display:inline-block;background:linear-gradient(135deg,var(--accent2),var(--accent));color:#fff;text-decoration:none;font-weight:600;padding:10px 18px;border-radius:12px}
footer{color:var(--sub);font-size:.9rem;margin-top:28px;text-align:center}
details{border-top:1px solid var(--line);padding:10px 0}details:first-of-type{border-top:0}
summary{cursor:pointer;font-weight:600}