*{box-sizing:border-box}body{margin:0;font:16px/1.6 -apple-system,Segoe UI,Roboto,Arial,sans-serif;color:#1c2230;background:#fff}
header{background:#0f1b2d;color:#fff}nav{max-width:960px;margin:0 auto;padding:14px 20px;display:flex;gap:22px;align-items:center}
nav a{color:#cfe0ff;text-decoration:none;font-size:15px}nav a:hover{color:#fff}nav .brand{font-weight:600;color:#fff;margin-right:auto;letter-spacing:.3px}
main{max-width:960px;margin:0 auto;padding:34px 20px}h1{font-size:30px;margin:0 0 12px}h2{font-size:20px;margin:28px 0 8px}
.lead{font-size:18px;color:#41506b;margin-bottom:22px}.cards{display:grid;grid-template-columns:repeat(auto-fit,minmax(240px,1fr));gap:18px;margin:22px 0}
.card{border:1px solid #e2e8f2;border-radius:10px;padding:16px 18px;background:#fafcff}.card h3{margin:0 0 6px;font-size:17px}
footer{border-top:1px solid #e2e8f2;margin-top:40px;padding:18px 20px;color:#6b7a94;font-size:14px}footer div{max-width:960px;margin:0 auto}
table{border-collapse:collapse;width:100%;margin:14px 0}th,td{border:1px solid #e2e8f2;padding:8px 10px;text-align:left;font-size:15px}th{background:#f4f7fc}
code{background:#f2f5fa;padding:1px 5px;border-radius:4px}