*,*::before,*::after{box-sizing:border-box}
:root{
  --ink:#16202b;
  --muted:#5b6b7c;
  --line:#e3e8ee;
  --bg:#ffffff;
  --bg-soft:#f6f8fa;
  --accent:#1f4e79;
}
html{-webkit-text-size-adjust:100%}
body{
  margin:0;
  font:16px/1.65 -apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,Helvetica,Arial,sans-serif;
  color:var(--ink);
  background:var(--bg);
}
.container{width:100%;max-width:1040px;margin:0 auto;padding:0 24px}
.narrow{max-width:720px}
a{color:var(--accent);text-decoration:none}
a:hover{text-decoration:underline}
.site-header{border-bottom:1px solid var(--line)}
.nav-wrap{display:flex;align-items:center;justify-content:space-between;min-height:64px;flex-wrap:wrap;gap:12px}
.brand{font-weight:600;font-size:1.05rem;color:var(--ink);letter-spacing:-0.01em}
.nav-wrap nav{display:flex;gap:22px}
.nav-wrap nav a{color:var(--muted);font-size:.95rem}
.nav-wrap nav a:hover,.nav-wrap nav a[aria-current="page"]{color:var(--ink);text-decoration:none}
.hero{background:var(--bg-soft);border-bottom:1px solid var(--line);padding:88px 0}
.hero h1{margin:0 0 16px;font-size:2.35rem;line-height:1.2;letter-spacing:-0.02em;max-width:18ch}
.lead{font-size:1.1rem;color:var(--muted);max-width:60ch;margin:0 0 28px}
.btn{display:inline-block;background:var(--accent);color:#fff;padding:11px 22px;border-radius:6px;font-size:.95rem}
.btn:hover{background:#173c5c;text-decoration:none}
.section{padding:64px 0}
.section h1{margin:0 0 20px;font-size:1.9rem;letter-spacing:-0.01em}
.section h2{font-size:1.15rem;margin:32px 0 10px}
.section p{color:var(--muted);margin:0 0 16px}
.section ul{color:var(--muted);padding-left:22px;margin:0 0 16px}
.section li{margin-bottom:6px}
.grid-3{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
.card{border:1px solid var(--line);border-radius:8px;padding:24px;background:#fff}
.card h2{margin:0 0 10px;font-size:1.05rem;color:var(--ink)}
.card p{color:var(--muted);margin:0;font-size:.95rem}
.site-footer{border-top:1px solid var(--line);padding:28px 0;margin-top:40px}
.site-footer p{margin:0;color:var(--muted);font-size:.88rem}
@media (max-width:720px){
  .hero{padding:56px 0}
  .hero h1{font-size:1.75rem}
  .grid-3{grid-template-columns:1fr}
  .section{padding:48px 0}
}