body{font-family:Arial,sans-serif;margin:0;color:#333}.hero{background:#114a8d;color:#fff;padding:70px 20px;text-align:center}.btn{background:#25D366;color:#fff;padding:12px 20px;text-decoration:none;border-radius:6px}.grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(180px,1fr));gap:12px}section{max-width:1000px;margin:auto;padding:40px 20px}footer{text-align:center;padding:20px;background:#eee}