:root{
  --bg:#fbfbfd; --fg:#16181d; --muted:#5f6672;
  --line:#e4e7ec; --accent:#2f5bd4; --card:#fff;
}
@media (prefers-color-scheme:dark){
  :root{--bg:#0f1115;--fg:#e8eaee;--muted:#9aa2b1;--line:#242832;--accent:#6f96ff;--card:#161922}
}
*{box-sizing:border-box}
body{margin:0;background:var(--bg);color:var(--fg);
  font:16px/1.6 -apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,Helvetica,Arial,sans-serif;
  -webkit-font-smoothing:antialiased}
.wrap{max-width:1040px;margin:0 auto;padding:0 24px}
.top{border-bottom:1px solid var(--line);background:var(--card)}
.top .wrap{display:flex;align-items:center;justify-content:space-between;height:64px}
.logo{font-weight:700;font-size:19px;text-decoration:none;color:var(--fg);letter-spacing:-.02em}
.logo span{color:var(--accent)}
nav a{color:var(--muted);text-decoration:none;margin-left:22px;font-size:14.5px}
nav a:hover{color:var(--fg)}
.hero{padding:80px 24px 48px;max-width:760px}
h1{font-size:clamp(30px,5vw,46px);line-height:1.15;letter-spacing:-.03em;margin:0 0 18px}
.lead{font-size:18px;color:var(--muted);margin:0 0 28px}
.cta{display:flex;gap:12px;flex-wrap:wrap}
.btn{display:inline-block;background:var(--accent);color:#fff;padding:11px 20px;border-radius:8px;
  text-decoration:none;font-size:15px;font-weight:500;border:1px solid transparent}
.btn.ghost{background:transparent;color:var(--fg);border-color:var(--line)}
.note{margin-top:18px;font-size:13.5px;color:var(--muted)}
.grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(280px,1fr));gap:18px;padding-bottom:56px}
.card{background:var(--card);border:1px solid var(--line);border-radius:12px;padding:22px}
.card h3{margin:0 0 8px;font-size:16px;letter-spacing:-.01em}
.card p{margin:0;color:var(--muted);font-size:14.5px}
.code-block{padding-bottom:72px}
.code-block h2{font-size:22px;letter-spacing:-.02em;margin:0 0 16px}
pre{background:var(--card);border:1px solid var(--line);border-radius:10px;padding:18px;overflow-x:auto;margin:0 0 12px}
code{font-family:ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;font-size:13.5px}
.muted{color:var(--muted);font-size:13.5px;margin:0}
footer{border-top:1px solid var(--line);background:var(--card)}
.foot{display:flex;justify-content:space-between;align-items:center;
  padding-top:22px;padding-bottom:22px;flex-wrap:wrap;gap:10px;color:var(--muted);font-size:13.5px}
.foot p{margin:0}
.foot nav a{margin-left:0;margin-right:20px}