:root { --primary: #6366f1; --bg: #f8fafc; --text: #1e293b; --accent: #ec4899; }
        * { box-sizing: border-box; margin: 0; padding: 0; }
        body { font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif; line-height: 1.6; color: var(--text); background-color: var(--bg); }
        .container { max-width: 1200px; margin: 0 auto; padding: 0 20px; }
        header { background: #fff; padding: 15px 0; border-bottom: 1px solid #e2e8f0; position: sticky; top: 0; z-index: 1000; }
        .nav-inner { display: flex; align-items: center; justify-content: space-between; }
        .nav-links { display: flex; gap: 0; align-items: center; }
        .nav-links a { padding: 10px 15px; text-decoration: none; color: var(--text); font-weight: 500; font-size: 14px; }
        .btn { padding: 10px 20px; border-radius: 8px; text-decoration: none; font-weight: 600; display: inline-block; cursor: pointer; transition: 0.3s; }
        .btn-primary { background: var(--primary); color: white; }
        .hero { padding: 100px 0; text-align: center; background: linear-gradient(135deg, #f1f5f9 0%, #e2e8f0 100%); }
        .hero h1 { font-size: 3rem; margin-bottom: 20px; color: #0f172a; }
        .grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(280px, 1fr)); gap: 20px; margin-top: 40px; }
        .card { background: white; padding: 30px; border-radius: 16px; box-shadow: 0 4px 6px -1px rgba(0,0,0,0.1); transition: 0.3s; }
        .card:hover { transform: translateY(-5px); box-shadow: 0 10px 15px -3px rgba(0,0,0,0.1); }
        .faq-item { margin-bottom: 10px; border-bottom: 1px solid #e2e8f0; }
        .faq-q { padding: 15px; cursor: pointer; font-weight: 600; }
        .faq-a { padding: 0 15px 15px; display: none; color: #64748b; }
        footer { background: #0f172a; color: #94a3b8; padding: 60px 0 20px; margin-top: 60px; }
        .float-kefu { position: fixed; right: 20px; bottom: 20px; z-index: 999; }
        @media (max-width: 768px) { .nav-links { display: none; } }