:root { --primary: #6366f1; --accent: #f43f5e; --text: #1e293b; --bg: #ffffff; }
        * { box-sizing: border-box; margin: 0; padding: 0; }
        body { font-family: 'PingFang SC', sans-serif; line-height: 1.6; color: var(--text); background: var(--bg); }
        .container { max-width: 1200px; margin: 0 auto; padding: 0 20px; }
        header { padding: 20px 0; display: flex; align-items: center; justify-content: space-between; border-bottom: 1px solid #e2e8f0; }
        .nav-links { display: flex; gap: 0; }
        .nav-links a { padding: 0 15px; text-decoration: none; color: var(--text); font-weight: 500; }
        .hero { padding: 100px 0; text-align: center; background: linear-gradient(135deg, #f8fafc 0%, #eef2ff 100%); }
        h1 { font-size: 3rem; margin-bottom: 20px; color: var(--primary); }
        .btn { display: inline-block; padding: 12px 30px; background: var(--primary); color: #fff; border-radius: 8px; text-decoration: none; font-weight: bold; margin: 10px; transition: 0.3s; }
        .btn:hover { background: #4f46e5; transform: translateY(-2px); }
        section { padding: 80px 0; }
        .grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(280px, 1fr)); gap: 30px; }
        .card { padding: 30px; border: 1px solid #e2e8f0; border-radius: 16px; background: #fff; transition: 0.3s; }
        .card:hover { box-shadow: 0 20px 25px -5px rgba(0,0,0,0.1); }
        table { width: 100%; border-collapse: collapse; margin-top: 20px; }
        th, td { padding: 15px; border: 1px solid #e2e8f0; text-align: center; }
        .faq-item { margin-bottom: 15px; border: 1px solid #e2e8f0; border-radius: 8px; padding: 15px; cursor: pointer; }
        footer { padding: 40px 0; background: #0f172a; color: #f1f5f9; text-align: center; }
        .floating-kf { position: fixed; bottom: 30px; right: 30px; z-index: 100; }
        @media (max-width: 768px) { h1 { font-size: 2rem; } .nav-links { display: none; } }