:root{--ink:#0f172a;--muted:#475569;--line:#e2e8f0;--bg:#ffffff;--soft:#f8fafc;--accent:#2563eb}
*{box-sizing:border-box}
html,body{margin:0;padding:0}
body{font-family:-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,Helvetica,Arial,sans-serif;color:var(--ink);background:var(--bg);line-height:1.6;-webkit-font-smoothing:antialiased}
a{color:var(--accent);text-decoration:none}
a:hover{text-decoration:underline}
.wrap{max-width:960px;margin:0 auto;padding:0 24px}
header{border-bottom:1px solid var(--line)}
header .wrap{display:flex;align-items:center;justify-content:space-between;height:64px}
.logo{font-weight:700;font-size:20px;letter-spacing:-.02em;color:var(--ink)}
.logo span{display:inline-block;width:10px;height:10px;border-radius:3px;background:var(--accent);margin-right:8px;vertical-align:1px}
nav a{color:var(--muted);margin-left:24px;font-size:15px}
.hero{padding:96px 0 72px}
.hero h1{font-size:44px;line-height:1.15;letter-spacing:-.03em;margin:0 0 20px;max-width:720px}
.hero p{font-size:19px;color:var(--muted);max-width:620px;margin:0 0 32px}
.btn{display:inline-block;background:var(--ink);color:#fff;padding:12px 22px;border-radius:8px;font-weight:600;font-size:15px}
.btn:hover{text-decoration:none;opacity:.9}
.grid{display:grid;grid-template-columns:repeat(3,1fr);gap:20px;padding:0 0 88px}
.card{background:var(--soft);border:1px solid var(--line);border-radius:12px;padding:24px}
.card h3{margin:0 0 8px;font-size:17px}
.card p{margin:0;color:var(--muted);font-size:15px}
.contact{border-top:1px solid var(--line);padding:64px 0}
.contact h2{margin:0 0 8px;font-size:26px;letter-spacing:-.02em}
.contact p{margin:0;color:var(--muted)}
footer{border-top:1px solid var(--line);padding:28px 0;font-size:14px;color:var(--muted)}
footer .wrap{display:flex;justify-content:space-between;flex-wrap:wrap;gap:12px}
footer a{color:var(--muted);margin-left:20px}
.doc{padding:56px 0 80px;max-width:760px}
.doc h1{font-size:34px;letter-spacing:-.02em;margin:0 0 6px}
.doc .date{color:var(--muted);margin:0 0 32px;font-size:15px}
.doc h2{font-size:19px;margin:32px 0 8px}
.doc p,.doc li{color:#334155;font-size:16px}
@media (max-width:720px){.hero{padding:64px 0 48px}.hero h1{font-size:32px}.grid{grid-template-columns:1fr}nav a{margin-left:16px}footer a{margin-left:0;margin-right:16px}}