:root { --primary: #00d2ff; --dark: #1a1a1a; --light: #f8f9fa; }
        body { font-family: 'PingFang SC', sans-serif; margin: 0; color: #333; line-height: 1.6; background: #fff; }
        .container { max-width: 1200px; margin: 0 auto; padding: 0 20px; }
        header { padding: 20px 0; border-bottom: 1px solid #eee; background: #fff; position: sticky; top: 0; z-index: 1000; }
        nav { display: flex; align-items: center; justify-content: space-between; }
        .nav-links { display: flex; gap: 0; }
        .nav-links a { padding: 0 15px; color: #333; text-decoration: none; font-weight: 500; }
        .hero { padding: 80px 0; text-align: center; background: linear-gradient(135deg, #f0faff, #e0f7fa); }
        h1 { font-size: 2.5rem; margin-bottom: 20px; color: var(--dark); }
        .btn { padding: 12px 30px; background: var(--primary); color: #fff; border-radius: 50px; text-decoration: none; display: inline-block; transition: 0.3s; }
        .section { padding: 60px 0; }
        .grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(280px, 1fr)); gap: 30px; }
        .card { padding: 25px; border: 1px solid #eee; border-radius: 15px; transition: 0.3s; background: #fff; }
        .card:hover { transform: translateY(-5px); 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: left; }
        .faq-item { margin-bottom: 15px; border-bottom: 1px solid #eee; }
        .form-group { margin-bottom: 15px; }
        input, select, textarea { width: 100%; padding: 10px; border: 1px solid #ddd; border-radius: 5px; }
        footer { background: var(--dark); color: #ccc; padding: 40px 0; text-align: center; }
        .ai-page-logo { height: 40px; }
        .kefu-qr { width: 150px; }