*{box-sizing:border-box}body{margin:0;font-family:Arial,sans-serif;color:#172033;line-height:1.8}a{color:#075fc2;text-decoration:none}.container{width:min(1100px,92%);margin:auto}.top{background:#081a2f;color:#fff;padding:8px 0;font-size:13px}.nav{background:#fff;border-bottom:1px solid #ddd;position:sticky;top:0}.navin{height:72px;display:flex;align-items:center;justify-content:space-between}.logo{font-size:20px;font-weight:900;color:#081a2f}.logo b{color:#e33a2e}.menu{display:flex;gap:20px;align-items:center;font-weight:700;font-size:14px}.btn{background:#e33a2e;color:#fff;padding:11px 17px;border-radius:9px}.banner{background:linear-gradient(110deg,#eaf5ff,#fff);padding:55px 0}.banner h1{font-size:46px;line-height:1.15;margin:0 0 12px}.banner p{font-size:18px;color:#475467}.section{padding:60px 0}.article{max-width:850px}.article h2{font-size:30px;line-height:1.25;margin-top:40px}.article h3{font-size:21px}.lead{font-size:19px;color:#475467}.toc,.note{background:#f7f9fc;border:1px solid #e1e7ef;border-radius:13px;padding:18px 24px}.note{background:#fff8e8;border-left:4px solid #f59e0b}.cta{background:#e33a2e;color:#fff;padding:40px 0}.cta .container{display:flex;justify-content:space-between;align-items:center}.cta a{background:#fff;color:#e33a2e;padding:12px 18px;border-radius:9px;font-weight:800}.footer{background:#061425;color:#d5deea;padding:35px 0}.float{position:fixed;right:18px;bottom:18px;background:#16a34a;color:#fff;padding:12px 18px;border-radius:999px;font-weight:800}@media(max-width:750px){.menu{display:none}.banner h1{font-size:35px}.cta .container{display:block}}