/* 全局样式 */
        :root {
            --primary-color: #3498db;
            --secondary-color: #2980b9;
            --dark-color: #2c3e50;
            --light-color: #ecf0f1;
            --success-color: #27ae60;
            --warning-color: #f39c12;
            --danger-color: #e74c3c;
        }
        
        * {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
            font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
        }
        
        body {
            line-height: 1.6;
            color: #333;
            background-color: #f9f9f9;
        }
        
        a {
            text-decoration: none;
            color: var(--primary-color);
        }
        
        a:hover {
            color: var(--secondary-color);
        }
        
        .container {
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 20px;
        }
        
        .btn {
            display: inline-block;
            padding: 10px 20px;
            background-color: var(--primary-color);
            color: white;
            border-radius: 5px;
            transition: all 0.3s ease;
            border: none;
            cursor: pointer;
            font-size: 16px;
        }
        
        .btn:hover {
            background-color: var(--secondary-color);
            color: white;
            transform: translateY(-2px);
        }
        
        .btn-secondary {
            background-color: var(--dark-color);
        }
        
        .btn-secondary:hover {
            background-color: #1a252f;
        }
        
        .text-center {
            text-align: center;
        }
        
        .section {
            padding: 60px 0;
        }
        
        .section-title {
            font-size: 2.5rem;
            margin-bottom: 30px;
            color: var(--dark-color);
            text-align: center;
        }
        
        .section-subtitle {
            font-size: 1.2rem;
            color: #666;
            text-align: center;
            margin-bottom: 40px;
        }
        
        /* 导航栏样式 */
        header {
            background-color: white;
            box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
            position: sticky;
            top: 0;
            z-index: 1000;
        }
        
        nav {
            display: flex;
            justify-content: space-between;
            align-items: center;
            padding: 20px 0;
        }
        
        .logo {
            font-size: 1.8rem;
            font-weight: bold;
            color: var(--dark-color);
        }
        
        .logo span {
            color: var(--primary-color);
        }
        
        .nav-links {
            display: flex;
            list-style: none;
        }
        
        .nav-links li {
            margin-left: 30px;
        }
        
        .nav-links a {
            color: var(--dark-color);
            font-weight: 500;
        }
        
        .nav-links a:hover {
            color: var(--primary-color);
        }
        
        .mobile-menu-btn {
            display: none;
            background: none;
            border: none;
            font-size: 1.5rem;
            cursor: pointer;
        }
        
        /* 英雄区域样式 */
        .hero {
            background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
            color: white;
            padding: 100px 0;
            text-align: center;
        }
        
        .hero h1 {
            font-size: 3rem;
            margin-bottom: 20px;
        }
        
        .hero p {
            font-size: 1.2rem;
            max-width: 700px;
            margin: 0 auto 30px;
        }
        
        .hero-buttons {
            display: flex;
            justify-content: center;
            gap: 20px;
            margin-bottom: 40px;
        }
        
        .hero-image {
            max-width: 800px;
            margin: 0 auto;
            box-shadow: 0 10px 30px rgba(0, 0, 0, 0.2);
            border-radius: 10px;
            overflow: hidden;
        }
        
        .hero-image img {
            width: 100%;
            display: block;
        }
        
        /* 功能区域样式 */
        .features {
            background-color: white;
        }
        
        .features-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
            gap: 30px;
            margin-top: 40px;
        }
        
        .feature-card {
            background-color: var(--light-color);
            padding: 30px;
            border-radius: 10px;
            text-align: center;
            transition: transform 0.3s ease;
        }
        
        .feature-card:hover {
            transform: translateY(-10px);
        }
        
        .feature-icon {
            font-size: 3rem;
            color: var(--primary-color);
            margin-bottom: 20px;
        }
        
        .feature-card h3 {
            font-size: 1.5rem;
            margin-bottom: 15px;
            color: var(--dark-color);
        }
        
        /* 评价区域样式 */
        .testimonials {
            background-color: var(--light-color);
        }
        
        .testimonials-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
            gap: 30px;
            margin-top: 40px;
        }
        
        .testimonial-card {
            background-color: white;
            padding: 30px;
            border-radius: 10px;
            box-shadow: 0 5px 15px rgba(0, 0, 0, 0.05);
        }
        
        .testimonial-text {
            font-style: italic;
            margin-bottom: 20px;
        }
        
        .testimonial-author {
            display: flex;
            align-items: center;
        }
        
        .author-avatar {
            width: 50px;
            height: 50px;
            border-radius: 50%;
            background-color: #ddd;
            margin-right: 15px;
            overflow: hidden;
        }
        
        .author-info h4 {
            margin-bottom: 5px;
        }
        
        .author-info p {
            color: #666;
            font-size: 0.9rem;
        }
        
        /* 下载引导区样式 */
        .download-cta {
            background: linear-gradient(135deg, var(--dark-color), #1a252f);
            color: white;
            text-align: center;
            padding: 80px 0;
        }
        
        .download-cta h2 {
            font-size: 2.5rem;
            margin-bottom: 20px;
        }
        
        .download-cta p {
            font-size: 1.2rem;
            max-width: 700px;
            margin: 0 auto 40px;
        }
        
        .download-platforms {
            display: flex;
            justify-content: center;
            gap: 20px;
            flex-wrap: wrap;
        }
        
        .platform-btn {
            display: flex;
            align-items: center;
            background-color: white;
            color: var(--dark-color);
            padding: 15px 25px;
            border-radius: 5px;
            font-weight: bold;
            transition: all 0.3s ease;
        }
        
        .platform-btn:hover {
            transform: translateY(-5px);
            box-shadow: 0 5px 15px rgba(0, 0, 0, 0.1);
        }
        
        .platform-icon {
            font-size: 1.5rem;
            margin-right: 10px;
        }
        
        /* 页脚样式 */
        footer {
            background-color: var(--dark-color);
            color: white;
            padding: 60px 0 20px;
        }
        
        .footer-content {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
            gap: 40px;
            margin-bottom: 40px;
        }
        
        .footer-column h3 {
            font-size: 1.3rem;
            margin-bottom: 20px;
            color: var(--light-color);
        }
        
        .footer-links {
            list-style: none;
        }
        
        .footer-links li {
            margin-bottom: 10px;
        }
        
        .footer-links a {
            color: #bbb;
        }
        
        .footer-links a:hover {
            color: white;
        }
        
        .social-links {
            display: flex;
            gap: 15px;
        }
        
        .social-link {
            display: flex;
            align-items: center;
            justify-content: center;
            width: 40px;
            height: 40px;
            background-color: rgba(255, 255, 255, 0.1);
            border-radius: 50%;
            color: white;
            transition: all 0.3s ease;
        }
        
        .social-link:hover {
            background-color: var(--primary-color);
            transform: translateY(-3px);
        }
        
        .footer-bottom {
            border-top: 1px solid rgba(255, 255, 255, 0.1);
            padding-top: 20px;
            text-align: center;
            color: #bbb;
            font-size: 0.9rem;
        }
        
        /* 响应式设计 */
        @media (max-width: 768px) {
            .nav-links {
                display: none;
                position: absolute;
                top: 80px;
                left: 0;
                right: 0;
                background-color: white;
                flex-direction: column;
                padding: 20px;
                box-shadow: 0 5px 10px rgba(0, 0, 0, 0.1);
            }
            
            .nav-links.active {
                display: flex;
            }
            
            .nav-links li {
                margin: 10px 0;
            }
            
            .mobile-menu-btn {
                display: block;
            }
            
            .hero h1 {
                font-size: 2.2rem;
            }
            
            .hero-buttons {
                flex-direction: column;
                align-items: center;
            }
            
            .section-title {
                font-size: 2rem;
            }
            
            .download-platforms {
                flex-direction: column;
                align-items: center;
            }
        }
        
        /* 产品页面特定样式 */
        .product-hero {
            background: linear-gradient(135deg, var(--secondary-color), #1a5276);
        }
        
        .version-comparison {
            margin: 60px auto;
            overflow-x: auto;
        }
        
        .comparison-table {
            width: 100%;
            border-collapse: collapse;
            margin: 30px 0;
        }
        
        .comparison-table th, .comparison-table td {
            padding: 15px;
            text-align: left;
            border-bottom: 1px solid #ddd;
        }
        
        .comparison-table th {
            background-color: var(--dark-color);
            color: white;
        }
        
        .comparison-table tr:nth-child(even) {
            background-color: #f2f2f2;
        }
        
        .feature-present {
            color: var(--success-color);
            font-weight: bold;
        }
        
        .feature-absent {
            color: var(--danger-color);
        }
        
        .pricing-plans {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
            gap: 30px;
            margin-top: 40px;
        }
        
        .pricing-card {
            background-color: white;
            border-radius: 10px;
            padding: 30px;
            box-shadow: 0 5px 15px rgba(0, 0, 0, 0.05);
            text-align: center;
            transition: all 0.3s ease;
        }
        
        .pricing-card:hover {
            transform: translateY(-10px);
            box-shadow: 0 15px 30px rgba(0, 0, 0, 0.1);
        }
        
        .pricing-card.popular {
            border: 2px solid var(--primary-color);
            position: relative;
        }
        
        .popular-badge {
            position: absolute;
            top: -15px;
            right: 20px;
            background-color: var(--primary-color);
            color: white;
            padding: 5px 15px;
            border-radius: 20px;
            font-size: 0.8rem;
            font-weight: bold;
        }
        
        .pricing-card h3 {
            font-size: 1.5rem;
            margin-bottom: 15px;
        }
        
        .price {
            font-size: 2.5rem;
            font-weight: bold;
            margin-bottom: 20px;
            color: var(--dark-color);
        }
        
        .price span {
            font-size: 1rem;
            color: #666;
        }
        
        .pricing-features {
            list-style: none;
            margin-bottom: 30px;
        }
        
        .pricing-features li {
            padding: 10px 0;
            border-bottom: 1px solid #eee;
        }
        
        /* 下载页面特定样式 */
        .download-platform-section {
            background-color: white;
            border-radius: 10px;
            padding: 30px;
            margin-bottom: 30px;
            box-shadow: 0 5px 15px rgba(0, 0, 0, 0.05);
        }
        
        .platform-header {
            display: flex;
            align-items: center;
            margin-bottom: 20px;
        }
        
        .platform-icon-lg {
            font-size: 2.5rem;
            margin-right: 20px;
            color: var(--primary-color);
        }
        
        .platform-info h2 {
            margin-bottom: 5px;
        }
        
        .download-options {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
            gap: 20px;
        }
        
        .download-option {
            background-color: var(--light-color);
            padding: 20px;
            border-radius: 5px;
            text-align: center;
        }
        
        .download-option h3 {
            margin-bottom: 15px;
        }
        
        .system-requirements {
            margin-top: 30px;
            background-color: #f5f5f5;
            padding: 20px;
            border-radius: 5px;
        }
        
        .system-requirements h3 {
            margin-bottom: 15px;
        }
        
        .requirements-list {
            list-style: none;
        }
        
        .requirements-list li {
            margin-bottom: 10px;
            display: flex;
        }
        
        .requirements-list li::before {
            content: "•";
            color: var(--primary-color);
            font-weight: bold;
            display: inline-block;
            width: 1em;
            margin-left: -1em;
        }
        
        .faq-section {
            margin-top: 60px;
        }
        
        .faq-item {
            margin-bottom: 20px;
            background-color: white;
            border-radius: 5px;
            overflow: hidden;
            box-shadow: 0 3px 10px rgba(0, 0, 0, 0.05);
        }
        
        .faq-question {
            padding: 20px;
            background-color: var(--light-color);
            font-weight: bold;
            cursor: pointer;
            display: flex;
            justify-content: space-between;
            align-items: center;
        }
        
        .faq-answer {
            padding: 0 20px;
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.3s ease, padding 0.3s ease;
        }
        
        .faq-item.active .faq-answer {
            padding: 20px;
            max-height: 500px;
        }
        
        /* 客户支持页面特定样式 */
        .support-options {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
            gap: 30px;
            margin-top: 40px;
        }
        
        .support-card {
            background-color: white;
            border-radius: 10px;
            padding: 30px;
            box-shadow: 0 5px 15px rgba(0, 0, 0, 0.05);
            text-align: center;
            transition: all 0.3s ease;
        }
        
        .support-card:hover {
            transform: translateY(-5px);
            box-shadow: 0 10px 25px rgba(0, 0, 0, 0.1);
        }
        
        .support-card i {
            font-size: 3rem;
            color: var(--primary-color);
            margin-bottom: 20px;
        }
        
        .support-card h3 {
            margin-bottom: 15px;
        }
        
        .contact-form {
            background-color: white;
            border-radius: 10px;
            padding: 30px;
            box-shadow: 0 5px 15px rgba(0, 0, 0, 0.05);
            margin-top: 40px;
        }
        
        .form-group {
            margin-bottom: 20px;
        }
        
        .form-group label {
            display: block;
            margin-bottom: 8px;
            font-weight: 500;
        }
        
        .form-control {
            width: 100%;
            padding: 12px;
            border: 1px solid #ddd;
            border-radius: 5px;
            font-size: 1rem;
        }
        
        textarea.form-control {
            min-height: 150px;
            resize: vertical;
        }
        
        .submit-btn {
            background-color: var(--primary-color);
            color: white;
            border: none;
            padding: 12px 25px;
            border-radius: 5px;
            cursor: pointer;
            font-size: 1rem;
            transition: all 0.3s ease;
        }
        
        .submit-btn:hover {
            background-color: var(--secondary-color);
        }
        
        /* 隐私政策页面特定样式 */
        .privacy-content {
            background-color: white;
            border-radius: 10px;
            padding: 40px;
            box-shadow: 0 5px 15px rgba(0, 0, 0, 0.05);
        }
        
        .privacy-section {
            margin-bottom: 40px;
        }
        
        .privacy-section h2 {
            color: var(--dark-color);
            margin-bottom: 20px;
            padding-bottom: 10px;
            border-bottom: 1px solid #eee;
        }
        
        .privacy-section h3 {
            color: var(--dark-color);
            margin: 25px 0 15px;
        }
        
        .privacy-section p, .privacy-section ul {
            margin-bottom: 15px;
            line-height: 1.8;
        }
        
        .privacy-section ul {
            padding-left: 20px;
        }
        
        .privacy-section li {
            margin-bottom: 10px;
        }
        
        .last-updated {
            font-style: italic;
            color: #666;
            text-align: right;
            margin-top: 40px;
        }