:root { --primary-color: #27ae60; --dark-text: #2c3e50; --bg-color: #f8f9fa; --accent-green: #eafaf1; }
        * { box-sizing: border-box; margin: 0; padding: 0; }
        body { font-family: 'Segoe UI', Roboto, sans-serif; line-height: 1.6; color: var(--dark-text); background: var(--bg-color); }
        .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 { display: flex; align-items: center; justify-content: space-between; }
        .nav-links { display: flex; gap: 0; }
        .nav-links a { text-decoration: none; color: var(--dark-text); padding: 10px 15px; font-weight: 500; transition: 0.3s; }
        .nav-links a:hover { color: var(--primary-color); }
        .hero { padding: 100px 0; text-align: center; background: linear-gradient(135deg, #eafaf1 0%, #ffffff 100%); }
        .btn { display: inline-block; padding: 12px 30px; background: var(--primary-color); color: #fff; text-decoration: none; border-radius: 5px; font-weight: bold; transition: 0.3s; }
        .btn:hover { transform: translateY(-2px); opacity: 0.9; }
        .grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(300px, 1fr)); gap: 20px; padding: 50px 0; }
        .card { background: #fff; padding: 30px; border-radius: 10px; border: 1px solid #eee; transition: 0.3s; }
        .card:hover { box-shadow: 0 10px 20px rgba(0,0,0,0.1); }
        .faq-item { margin-bottom: 10px; border-bottom: 1px solid #eee; }
        .faq-q { padding: 15px; cursor: pointer; font-weight: 600; display: flex; justify-content: space-between; }
        .faq-a { padding: 0 15px 15px; display: none; color: #666; }
        table { width: 100%; border-collapse: collapse; margin: 20px 0; }
        th, td { padding: 12px; border: 1px solid #eee; text-align: left; }
        footer { background: #2c3e50; color: #fff; padding: 40px 0; text-align: center; }
        .float-kefu { position: fixed; right: 20px; bottom: 20px; width: 120px; z-index: 999; }
        @media (max-width: 768px) { .nav-links { display: none; } }