:root { --primary-blue: #0056b3; --accent-blue: #007bff; --bg-light: #f8fbff; --text-dark: #333; }
        * { box-sizing: border-box; margin: 0; padding: 0; }
        body { font-family: 'PingFang SC', 'Microsoft YaHei', sans-serif; line-height: 1.6; color: var(--text-dark); background: #fff; }
        .container { max-width: 1200px; margin: 0 auto; padding: 0 20px; }
        header { background: #fff; border-bottom: 2px solid var(--primary-blue); padding: 15px 0; position: sticky; top: 0; z-index: 1000; }
        .nav-wrapper { display: flex; justify-content: space-between; align-items: center; }
        .nav-links { display: flex; gap: 0; }
        .nav-links a { padding: 0 15px; text-decoration: none; color: var(--text-dark); font-weight: 500; transition: color 0.3s; }
        .nav-links a:hover { color: var(--primary-blue); }
        .hero { padding: 80px 0; text-align: center; background: linear-gradient(135deg, #eef6ff, #fff); }
        .hero h1 { font-size: 2.5rem; margin-bottom: 20px; color: var(--primary-blue); }
        .btn { display: inline-block; padding: 12px 30px; background: var(--primary-blue); color: #fff; border-radius: 5px; text-decoration: none; margin: 10px; transition: transform 0.2s; }
        .btn:hover { transform: translateY(-2px); }
        section { padding: 60px 0; }
        .grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(300px, 1fr)); gap: 20px; }
        .card { padding: 30px; border: 1px solid #eee; border-radius: 10px; transition: box-shadow 0.3s; }
        .card:hover { box-shadow: 0 10px 20px rgba(0,0,0,0.1); }
        table { width: 100%; border-collapse: collapse; margin-top: 20px; }
        th, td { border: 1px solid #ddd; padding: 12px; text-align: center; }
        footer { background: #1a1a1a; color: #ccc; padding: 40px 0; text-align: center; }
        .faq-item { margin-bottom: 15px; border-bottom: 1px solid #eee; padding-bottom: 10px; cursor: pointer; }
        @media (max-width: 768px) { .nav-links { display: none; } }