*{box-sizing:border-box}
body{margin:0;font-family:-apple-system,"Segoe UI",Roboto,Arial,sans-serif;color:#1f2933;background:#fff;line-height:1.6}
a{color:#2563eb;text-decoration:none}
a:hover{text-decoration:underline}
.wrap{max-width:1040px;margin:0 auto;padding:0 20px}
.top{border-bottom:1px solid #e5e7eb}
.top .wrap{display:flex;align-items:center;justify-content:space-between;height:64px}
.logo{display:flex;align-items:center;gap:10px;font-weight:600;font-size:18px;color:#111827}
.logo:hover{text-decoration:none}
nav a{margin-left:24px;color:#4b5563}
.hero{background:#f3f6fb;padding:88px 0}
.hero h1{font-size:40px;line-height:1.2;margin:0 0 16px;max-width:680px}
.hero p{font-size:18px;color:#4b5563;max-width:620px;margin:0 0 28px}
.btn{display:inline-block;background:#2563eb;color:#fff;padding:12px 22px;border-radius:6px;font-weight:500}
.btn:hover{background:#1d4ed8;text-decoration:none}
.cards{display:grid;grid-template-columns:repeat(auto-fit,minmax(260px,1fr));gap:24px;padding-top:64px;padding-bottom:32px}
.cards article{border:1px solid #e5e7eb;border-radius:8px;padding:24px}
.cards h2{font-size:20px;margin:0 0 8px}
.cards p{margin:0;color:#4b5563}
.about,.contacts{padding-top:32px;padding-bottom:32px}
.about h2,.contacts h2{font-size:26px;margin:0 0 12px}
.about p{max-width:720px;color:#4b5563}
footer{border-top:1px solid #e5e7eb;margin-top:48px;padding:24px 0;color:#6b7280;font-size:14px}
.notfound{padding:120px 20px;text-align:center}
.notfound h1{font-size:72px;margin:0;color:#9ca3af}
@media (max-width:600px){.hero{padding:56px 0}.hero h1{font-size:28px}nav a{margin-left:14px}}