:root{--bg:#fff;--fg:#14213d;--muted:#5b6475;--line:#e5e8ef;--accent:#1f5eff;--card:#f6f8fc}
@media (prefers-color-scheme:dark){:root{--bg:#0f1420;--fg:#e8ecf5;--muted:#9aa4b8;--line:#232b3d;--accent:#6b97ff;--card:#161d2d}}
*{box-sizing:border-box}
body{margin:0;font:16px/1.6 system-ui,-apple-system,"Segoe UI",Roboto,sans-serif;background:var(--bg);color:var(--fg)}
.wrap{max-width:960px;margin:0 auto;padding:0 20px}
header{border-bottom:1px solid var(--line)}
.bar{display:flex;justify-content:space-between;align-items:center;padding:16px 20px}
nav a{margin-left:18px;color:var(--muted);text-decoration:none}
nav a:hover,header a{color:var(--accent)}
header a{text-decoration:none}
.hero{padding:64px 20px 48px}
h1{font-size:clamp(28px,5vw,42px);line-height:1.15;margin:0 0 16px}
h2{margin:40px 0 12px;font-size:24px}
.hero p{max-width:640px;color:var(--muted)}
.btn{display:inline-block;margin-top:16px;padding:12px 22px;background:var(--accent);color:#fff;border-radius:8px;text-decoration:none;font-weight:600}
.grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(220px,1fr));gap:16px}
.card{background:var(--card);border:1px solid var(--line);border-radius:12px;padding:20px}
.card h3{margin:0 0 8px}
.card p{margin:0;color:var(--muted)}
.text{padding-top:40px;padding-bottom:40px;max-width:760px}
.text li{margin-bottom:6px}
a{color:var(--accent)}
footer{border-top:1px solid var(--line);margin-top:56px;padding:24px 0;color:var(--muted);font-size:14px}