:root { --primary-color: #ff6600; --text-color: #333; --bg-light: #fff5f0; --footer-bg: #1a1a1a; }
        * { box-sizing: border-box; margin: 0; padding: 0; }
        body { font-family: 'PingFang SC', 'Microsoft YaHei', sans-serif; color: var(--text-color); line-height: 1.6; background: #fff; }
        .container { max-width: 1200px; margin: 0 auto; padding: 0 20px; }
        header { padding: 20px 0; background: #fff; border-bottom: 1px solid #eee; position: sticky; top: 0; z-index: 1000; }
        .nav-wrapper { display: flex; align-items: center; justify-content: space-between; }
        .nav-links { display: flex; gap: 0; list-style: none; }
        .nav-links li a { padding: 10px 15px; text-decoration: none; color: #333; font-weight: 600; transition: color 0.3s; }
        .hero { padding: 100px 0; background: linear-gradient(135deg, #fff5f0 0%, #fff 100%); text-align: center; }
        .hero h1 { font-size: 3rem; color: var(--primary-color); margin-bottom: 20px; }
        .btn { display: inline-block; padding: 15px 30px; background: var(--primary-color); color: #fff; border-radius: 50px; text-decoration: none; font-weight: bold; transition: transform 0.2s; }
        .btn:hover { transform: translateY(-3px); }
        .section { padding: 80px 0; }
        .grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(300px, 1fr)); gap: 30px; }
        .card { padding: 30px; border: 1px solid #eee; border-radius: 12px; transition: box-shadow 0.3s; }
        .card:hover { box-shadow: 0 10px 30px rgba(0,0,0,0.1); }
        footer { background: var(--footer-bg); color: #ccc; padding: 60px 0 20px; text-align: center; }
        .footer-links a { color: #fff; margin: 0 10px; text-decoration: none; }