:root { --primary: #2563eb; --accent: #db2777; --text: #1f2937; --bg: #f8fafc; }
        * { 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 { background: #fff; padding: 15px 0; position: sticky; top: 0; z-index: 1000; box-shadow: 0 2px 10px rgba(0,0,0,0.05); }
        .nav-inner { 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: var(--text); font-weight: 500; transition: color 0.3s; }
        .btn { padding: 10px 20px; border-radius: 6px; cursor: pointer; text-decoration: none; font-weight: bold; border: none; }
        .btn-primary { background: var(--primary); color: #fff; }
        .hero { padding: 80px 0; text-align: center; background: linear-gradient(135deg, #eff6ff, #fdf2f8); }
        .hero h1 { font-size: 3rem; margin-bottom: 20px; color: #111827; }
        .card-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(300px, 1fr)); gap: 20px; margin: 40px 0; }
        .card { background: #fff; padding: 30px; border-radius: 12px; box-shadow: 0 4px 6px rgba(0,0,0,0.05); transition: transform 0.3s; }
        .card:hover { transform: translateY(-5px); }
        table { width: 100%; border-collapse: collapse; margin: 30px 0; background: #fff; }
        th, td { padding: 15px; border: 1px solid #e5e7eb; text-align: left; }
        .faq-item { margin-bottom: 10px; border: 1px solid #e5e7eb; border-radius: 6px; overflow: hidden; }
        .faq-q { padding: 15px; background: #fff; cursor: pointer; font-weight: bold; }
        .faq-a { padding: 15px; display: none; background: #f9fafb; }
        footer { background: #111827; color: #9ca3af; padding: 40px 0; text-align: center; }
        .floating-kefu { position: fixed; right: 20px; bottom: 20px; z-index: 999; width: 80px; }
        @media (max-width: 768px) { .nav-links { display: none; } }