:root{--fg:#0f172a;--muted:#55607a;--line:#e5e8ef;--bg:#ffffff;--soft:#f6f8fc;--blue:#0a7cff}
@media (prefers-color-scheme:dark){:root{--fg:#eef1f7;--muted:#9aa4b8;--line:#262a33;--bg:#0f1115;--soft:#161922}}
*{box-sizing:border-box}
body{margin:0;background:var(--bg);color:var(--fg);font:16px/1.65 system-ui,-apple-system,"Segoe UI",sans-serif}
header{border-bottom:1px solid var(--line)}
header div,main,footer div{max-width:760px;margin:0 auto;padding:0 20px}
header div{display:flex;align-items:center;gap:10px;height:64px}
header a{color:inherit;text-decoration:none;font-weight:700;font-size:18px}
header nav{margin-left:auto;display:flex;gap:16px;font-size:14px}
header nav a{font-weight:500;color:var(--muted)}
.mark{width:28px;height:28px;border-radius:9px;background:linear-gradient(135deg,#00d9f5,#0a7cff 55%,#0a3fe0)}
main{padding-top:36px;padding-bottom:56px}
h1{font-size:34px;line-height:1.2;margin:0 0 8px}
h2{font-size:20px;margin:32px 0 8px}
p,li{color:var(--fg)}
.lead{font-size:18px;color:var(--muted)}
.updated{color:var(--muted);font-size:14px}
.card{background:var(--soft);border:1px solid var(--line);border-radius:16px;padding:18px 20px;margin:20px 0}
a{color:var(--blue)}
footer{border-top:1px solid var(--line);color:var(--muted);font-size:14px}
footer div{padding:20px;display:flex;gap:16px;flex-wrap:wrap}