:root { --primary-color: #6366f1; --bg-dark: #0f172a; --text-light: #f8fafc; --text-dark: #1e293b; --accent-neon: #06b6d4; }
        * { margin: 0; padding: 0; box-sizing: border-box; }
        body { font-family: 'PingFang SC', 'Microsoft YaHei', sans-serif; background: #ffffff; color: var(--text-dark); line-height: 1.6; }
        .container { max-width: 1200px; margin: 0 auto; padding: 0 20px; }
        header { background: #fff; padding: 20px 0; border-bottom: 1px solid #e2e8f0; position: sticky; top: 0; z-index: 1000; }
        .nav-wrapper { display: flex; justify-content: space-between; align-items: center; }
        .nav-links { display: flex; gap: 0; align-items: center; }
        .nav-links a { padding: 10px 15px; text-decoration: none; color: #475569; font-weight: 500; transition: color 0.3s; }
        .btn { padding: 10px 24px; border-radius: 8px; background: var(--primary-color); color: white; border: none; cursor: pointer; text-decoration: none; display: inline-block; }
        .hero { padding: 80px 0; text-align: center; background: linear-gradient(135deg, #f1f5f9 0%, #e2e8f0 100%); }
        h1 { font-size: 3rem; margin-bottom: 20px; color: var(--bg-dark); }
        .card-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(280px, 1fr)); gap: 20px; margin-top: 40px; }
        .card { padding: 30px; background: #fff; border-radius: 16px; border: 1px solid #e2e8f0; transition: transform 0.3s; }
        .card:hover { transform: translateY(-5px); box-shadow: 0 10px 25px rgba(0,0,0,0.1); }
        .faq-item { margin-bottom: 15px; border-bottom: 1px solid #e2e8f0; padding-bottom: 10px; }
        footer { background: var(--bg-dark); color: #94a3b8; padding: 40px 0; text-align: center; }
        .float-kefu { position: fixed; bottom: 30px; right: 30px; z-index: 999; }