:root { --primary-color: #2ecc71; --text-color: #333; --bg-color: #ffffff; --section-bg: #f9fff9; }
        * { box-sizing: border-box; margin: 0; padding: 0; }
        body { font-family: 'PingFang SC', 'Microsoft YaHei', sans-serif; line-height: 1.6; color: var(--text-color); background: var(--bg-color); }
        .container { max-width: 1200px; margin: 0 auto; padding: 0 20px; }
        header { padding: 20px 0; border-bottom: 1px solid #eee; position: sticky; top: 0; background: #fff; 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: #333; font-weight: 500; transition: color 0.3s; }
        .nav-links a:hover { color: var(--primary-color); }
        .hero { padding: 100px 0; text-align: center; background: linear-gradient(135deg, #f0fff4 0%, #ffffff 100%); }
        h1 { font-size: 3rem; margin-bottom: 20px; color: #1a1a1a; }
        .btn { display: inline-block; padding: 12px 30px; background: var(--primary-color); color: #fff; border-radius: 5px; text-decoration: none; font-weight: bold; transition: transform 0.2s; }
        .btn:hover { 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 #eee; border-radius: 10px; transition: box-shadow 0.3s; background: #fff; }
        .card:hover { box-shadow: 0 10px 20px rgba(0,0,0,0.1); }
        footer { padding: 40px 0; background: #2c3e50; color: #ecf0f1; text-align: center; }
        .faq-item { margin-bottom: 15px; border-bottom: 1px solid #eee; padding-bottom: 10px; }
        .faq-question { font-weight: bold; cursor: pointer; padding: 10px; background: #f4f4f4; border-radius: 5px; }
        .faq-answer { padding: 10px; display: none; }