:root { --primary: #ff4d4f; --accent: #1890ff; --dark: #1f1f1f; --light: #f9f9f9; }
        * { box-sizing: border-box; margin: 0; padding: 0; }
        body { font-family: 'PingFang SC', sans-serif; line-height: 1.6; color: #333; background: #fff; }
        .container { max-width: 1200px; margin: 0 auto; padding: 0 20px; }
        header { background: #fff; padding: 15px 0; border-bottom: 1px solid #eee; position: sticky; top: 0; z-index: 1000; }
        .nav-wrapper { display: flex; align-items: center; justify-content: space-between; }
        .nav-links { display: flex; align-items: center; gap: 0; }
        .nav-links a { padding: 0 15px; text-decoration: none; color: #333; font-weight: 500; font-size: 14px; }
        .btn-primary { background: var(--primary); color: #fff; padding: 8px 20px; border-radius: 5px; text-decoration: none; }
        .hero { padding: 80px 0; text-align: center; background: linear-gradient(135deg, #fff0f0 0%, #e6f7ff 100%); }
        h1 { font-size: 3rem; margin-bottom: 20px; color: var(--dark); }
        .section { padding: 60px 0; }
        .grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(300px, 1fr)); gap: 30px; }
        .card { padding: 30px; border-radius: 12px; background: #fff; border: 1px solid #eee; transition: 0.3s; }
        .card:hover { transform: translateY(-5px); box-shadow: 0 10px 20px rgba(0,0,0,0.05); }
        .table-wrap { overflow-x: auto; }
        table { width: 100%; border-collapse: collapse; margin-top: 20px; }
        th, td { padding: 15px; border: 1px solid #eee; text-align: left; }
        .faq-item { margin-bottom: 10px; border-bottom: 1px solid #eee; }
        .faq-q { padding: 15px; cursor: pointer; font-weight: 600; display: flex; justify-content: space-between; }
        footer { background: var(--dark); color: #ccc; padding: 40px 0; text-align: center; }
        .floating-kefu { position: fixed; right: 20px; bottom: 50px; width: 60px; z-index: 999; }
        @media (max-width: 768px) { h1 { font-size: 2rem; } .nav-links { display: none; } }