:root{--primary:#0a2c5e;--primary-light:#1a3d7a;--secondary:#b61a1a;--secondary-light:#d32f2f;--accent:#e8b015;--light:#f5f7fa;--dark:#1a1a1a;--gray:#6c757d;--transition:all .3s ease;--shadow:0 5px 15px #00000014;--radius:8px;--header-height:80px}*{box-sizing:border-box;margin:0;padding:0}html{scroll-behavior:smooth}body{min-width:320px;color:var(--dark);background:#fff;margin:0;font-family:Segoe UI,PingFang SC,Microsoft YaHei,sans-serif;line-height:1.7;overflow-x:hidden}a{color:inherit;text-decoration:none}h1,h2,h3,h4,h5{margin-bottom:1rem;font-weight:700;line-height:1.3}h1{font-size:3.5rem}h2{margin-bottom:3rem;font-size:2.5rem;position:relative}h3{font-size:1.8rem}p{color:var(--gray);margin-bottom:1.5rem}button,input,select,textarea{font:inherit}.container{width:100%;max-width:1200px;margin:0 auto;padding:0 20px}.btn{border-radius:var(--radius);transition:var(--transition);cursor:pointer;text-align:center;border:none;padding:14px 32px;font-size:1rem;font-weight:600;text-decoration:none;display:inline-block}.btn-primary{background:var(--secondary);color:#fff;box-shadow:0 4px 10px #b61a1a4d}.btn-primary:hover{background:var(--secondary-light);transform:translateY(-3px);box-shadow:0 6px 15px #b61a1a66}.btn-outline{color:#fff;background:0 0;border:2px solid #fff}.btn-outline:hover{color:var(--primary);background:#fff}section{padding:100px 0}.section-title{text-align:center}.section-title h2:after{left:50%;transform:translate(-50%)}@keyframes pulse{0%{box-shadow:0 0 #b61a1a66}70%{box-shadow:0 0 0 10px #b61a1a00}to{box-shadow:0 0 #b61a1a00}}@media (width<=992px){h1{font-size:3rem}h2{font-size:2.2rem}}@media (width<=768px){h1{font-size:2.5rem}}