:root {
            --primary: #0066cc;
            --secondary: #ff6600;
            --light: #f8f9fa;
            --dark: #212529;
            --gradient: linear-gradient(135deg, var(--primary), #004d99);
        }
        
        * {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
            font-family: 'PingFang SC', 'Microsoft YaHei', sans-serif;
        }
        
        body {
            background-color: #f5f7fa;
            color: #333;
            line-height: 1.6;
        }
        
        .container {
            width: 100%;
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 15px;
        }
        
        /* 头部导航 */
        header {
            background: white;
            box-shadow: 0 2px 10px rgba(0,0,0,0.1);
            position: sticky;
            top: 0;
            z-index: 1000;
        }
        
        .navbar {
            display: flex;
            justify-content: space-between;
            align-items: center;
            padding: 15px 0;
        }
        
        .logo {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 24px;
            font-weight: bold;
            color: var(--primary);
        }
        
        .logo img {
            height: 40px;
        }
        
        .nav-menu {
            display: flex;
            list-style: none;
        }
        
        .nav-menu li a {
            text-decoration: none;
            color: var(--dark);
            padding: 10px 15px;
            font-weight: 500;
            transition: all 0.3s;
            border-radius: 4px;
        }
        
        .nav-menu li a:hover {
            background: var(--light);
            color: var(--primary);
        }
        
        .nav-menu li a.active {
            background: var(--primary);
            color: white;
        }
        
        .mobile-toggle {
            display: none;
            font-size: 24px;
            cursor: pointer;
        }
        
        /* 英雄区域 */
        .hero {
            background: var(--gradient);
            color: white;
            padding: 80px 0;
            text-align: center;
            position: relative;
            overflow: hidden;
        }
        
        .hero::before {
            content: '';
            position: absolute;
            top: -50px;
            left: -50px;
            width: 200px;
            height: 200px;
            background: rgba(255,255,255,0.1);
            border-radius: 50%;
        }
        
        .hero::after {
            content: '';
            position: absolute;
            bottom: -80px;
            right: -30px;
            width: 250px;
            height: 250px;
            background: rgba(255,255,255,0.1);
            border-radius: 50%;
        }
        
        .hero-content {
            position: relative;
            z-index: 2;
            max-width: 800px;
            margin: 0 auto;
        }
        
        .hero h1 {
            font-size: 2.8rem;
            margin-bottom: 20px;
            line-height: 1.2;
        }
        
        .hero p {
            font-size: 1.2rem;
            margin-bottom: 30px;
            opacity: 0.9;
        }
        
        .btn-group {
            display: flex;
            justify-content: center;
            gap: 20px;
            flex-wrap: wrap;
        }
        
        .btn {
            padding: 12px 30px;
            border-radius: 50px;
            font-weight: bold;
            text-decoration: none;
            transition: all 0.3s;
            display: inline-block;
            cursor: pointer;
            font-size: 1rem;
            border: 2px solid transparent;
        }
        
        .btn-primary {
            background: white;
            color: var(--primary);
        }
        
        .btn-primary:hover {
            background: var(--light);
            transform: translateY(-3px);
            box-shadow: 0 5px 15px rgba(0,0,0,0.1);
        }
        
        .btn-secondary {
            background: transparent;
            color: white;
            border-color: rgba(255,255,255,0.5);
        }
        
        .btn-secondary:hover {
            background: rgba(255,255,255,0.1);
            transform: translateY(-3px);
            box-shadow: 0 5px 15px rgba(0,0,0,0.1);
        }
        
        /* 套餐详情 */
        .package {
            padding: 80px 0;
        }
        
        .section-title {
            text-align: center;
            margin-bottom: 50px;
        }
        
        .section-title h2 {
            font-size: 2.2rem;
            color: var(--primary);
            margin-bottom: 15px;
        }
        
        .section-title p {
            color: #666;
            max-width: 700px;
            margin: 0 auto;
        }
        
        .package-details {
            background: white;
            border-radius: 15px;
            box-shadow: 0 10px 30px rgba(0,0,0,0.05);
            overflow: hidden;
            max-width: 900px;
            margin: 0 auto;
        }
        
        .package-header {
            background: var(--gradient);
            color: white;
            padding: 25px;
            text-align: center;
        }
        
        .package-header h3 {
            font-size: 1.8rem;
            margin-bottom: 10px;
        }
        
        .price {
            font-size: 2.5rem;
            font-weight: bold;
            margin-bottom: 5px;
        }
        
        .package-body {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
            gap: 30px;
            padding: 40px;
        }
        
        .feature {
            text-align: center;
            padding: 20px;
            border-radius: 10px;
            transition: all 0.3s;
        }
        
        .feature:hover {
            transform: translateY(-5px);
            box-shadow: 0 5px 15px rgba(0,0,0,0.05);
        }
        
        .feature-icon {
            width: 70px;
            height: 70px;
            margin: 0 auto 20px;
            background: var(--light);
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 30px;
            color: var(--primary);
        }
        
        .feature h4 {
            font-size: 1.3rem;
            margin-bottom: 10px;
            color: var(--dark);
        }
        
        .feature p {
            color: #666;
        }
        
        .highlight {
            color: var(--secondary);
            font-weight: bold;
        }
        
        /* 优势部分 */
        .advantages {
            background: var(--light);
            padding: 80px 0;
        }
        
        .advantages-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
            gap: 30px;
        }
        
        .advantage-card {
            background: white;
            border-radius: 10px;
            padding: 30px;
            box-shadow: 0 5px 15px rgba(0,0,0,0.05);
            transition: all 0.3s;
        }
        
        .advantage-card:hover {
            transform: translateY(-10px);
            box-shadow: 0 15px 30px rgba(0,0,0,0.1);
        }
        
        .advantage-card h3 {
            font-size: 1.4rem;
            color: var(--primary);
            margin-bottom: 15px;
            display: flex;
            align-items: center;
            gap: 10px;
        }
        
        .advantage-card h3 i {
            color: var(--secondary);
        }
        
        /* FAQ部分 */
        .faq {
            padding: 80px 0;
        }
        
        .faq-container {
            max-width: 800px;
            margin: 0 auto;
        }
        
        .faq-item {
            margin-bottom: 20px;
            border-radius: 10px;
            overflow: hidden;
            box-shadow: 0 3px 10px rgba(0,0,0,0.05);
        }
        
        .faq-question {
            background: white;
            padding: 20px 25px;
            font-weight: bold;
            cursor: pointer;
            display: flex;
            justify-content: space-between;
            align-items: center;
            font-size: 1.1rem;
        }
        
        .faq-question::after {
            content: '+';
            font-size: 1.5rem;
            transition: all 0.3s;
        }
        
        .faq-question.active::after {
            transform: rotate(45deg);
        }
        
        .faq-answer {
            background: #fafafa;
            padding: 0 25px;
            max-height: 0;
            overflow: hidden;
            transition: all 0.3s;
        }
        
        .faq-answer.show {
            padding: 20px 25px;
            max-height: 1000px;
        }
        
        /* CTA部分 */
        .cta {
            background: var(--gradient);
            color: white;
            text-align: center;
            padding: 80px 0;
            position: relative;
            overflow: hidden;
        }
        
        .cta::before {
            content: '';
            position: absolute;
            top: -100px;
            left: -100px;
            width: 300px;
            height: 300px;
            background: rgba(255,255,255,0.05);
            border-radius: 50%;
        }
        
        .cta::after {
            content: '';
            position: absolute;
            bottom: -150px;
            right: -100px;
            width: 400px;
            height: 400px;
            background: rgba(255,255,255,0.05);
            border-radius: 50%;
        }
        
        .cta-content {
            position: relative;
            z-index: 2;
            max-width: 700px;
            margin: 0 auto;
        }
        
        .cta h2 {
            font-size: 2.5rem;
            margin-bottom: 20px;
        }
        
        .cta p {
            font-size: 1.2rem;
            margin-bottom: 30px;
            opacity: 0.9;
        }
        
        .btn-large {
            padding: 15px 40px;
            font-size: 1.1rem;
        }
        
        /* 页脚 */
        footer {
            background: var(--dark);
            color: rgba(255,255,255,0.7);
            padding: 50px 0 20px;
            text-align: center;
        }
        
        .footer-content {
            max-width: 700px;
            margin: 0 auto 30px;
        }
        
        .copyright {
            padding-top: 20px;
            border-top: 1px solid rgba(255,255,255,0.1);
            font-size: 0.9rem;
        }
        
        /* 响应式设计 */
        @media (max-width: 768px) {
            .nav-menu {
                position: fixed;
                top: 70px;
                left: 0;
                width: 100%;
                background: white;
                flex-direction: column;
                align-items: center;
                padding: 20px 0;
                box-shadow: 0 5px 10px rgba(0,0,0,0.1);
                transform: translateY(-150%);
                transition: all 0.3s;
            }
            
            .nav-menu.active {
                transform: translateY(0);
            }
            
            .mobile-toggle {
                display: block;
            }
            
            .btn-group {
                flex-direction: column;
                align-items: center;
            }
            
            .hero h1 {
                font-size: 2.2rem;
            }
            
            .package-body {
                grid-template-columns: 1fr;
            }
        }