/* 自定义样式 */
        :root {
            --primary-color: #0078D7;
            --secondary-color: #00A4EF;
            --accent-color: #00D4FF;
            --dark-color: #003366;
            --light-color: #F2F2F2;
            --text-color: #333333;
            --text-light: #666666;
            --background-color: #FFFFFF;
            --background-alt: #F7F7F7;
        }
        
        body {
            font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
            color: var(--text-color);
            background-color: var(--background-color);
            scroll-behavior: smooth;
        }
        
        .gradient-bg {
            background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
        }
        
        .gradient-text {
            background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
        }
        
        .btn-primary {
            background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
            color: white;
            transition: all 0.3s ease;
        }
        
        .btn-primary:hover {
            transform: translateY(-3px);
            box-shadow: 0 10px 20px rgba(0, 120, 215, 0.3);
        }
        
        .btn-secondary {
            background-color: white;
            color: var(--primary-color);
            border: 2px solid var(--primary-color);
            transition: all 0.3s ease;
        }
        
        .btn-secondary:hover {
            background-color: var(--primary-color);
            color: white;
        }
        
        .card {
            transition: all 0.3s ease;
            border-radius: 12px;
            overflow: hidden;
            box-shadow: 0 4px 6px rgba(0, 0, 0, 0.05);
        }
        
        .card:hover {
            transform: translateY(-5px);
            box-shadow: 0 10px 20px rgba(0, 0, 0, 0.1);
        }
        
        .feature-icon {
            font-size: 2.5rem;
            color: var(--primary-color);
            margin-bottom: 1rem;
        }
        
        .sticky-download-btn {
            position: fixed;
            bottom: 30px;
            right: 30px;
            z-index: 1000;
            border-radius: 50px;
            padding: 15px 25px;
            font-weight: bold;
            box-shadow: 0 4px 15px rgba(0, 120, 215, 0.3);
            transition: all 0.3s ease;
            display: flex;
            align-items: center;
            gap: 10px;
        }
        
        .sticky-download-btn:hover {
            transform: translateY(-3px);
            box-shadow: 0 6px 20px rgba(0, 120, 215, 0.4);
        }
        
        .download-modal {
            display: none;
            position: fixed;
            top: 0;
            left: 0;
            width: 100%;
            height: 100%;
            background-color: rgba(0, 0, 0, 0.5);
            z-index: 2000;
            justify-content: center;
            align-items: center;
        }
        
        .download-modal-content {
            background-color: white;
            padding: 30px;
            border-radius: 15px;
            text-align: center;
            max-width: 400px;
            width: 90%;
            box-shadow: 0 10px 30px rgba(0, 0, 0, 0.2);
        }
        
        .qr-code {
            margin: 20px auto;
            display: block;
        }
        
        .comparison-table {
            width: 100%;
            border-collapse: collapse;
            margin: 20px 0;
        }
        
        .comparison-table th, .comparison-table td {
            padding: 12px 15px;
            text-align: left;
            border-bottom: 1px solid #ddd;
        }
        
        .comparison-table th {
            background-color: var(--primary-color);
            color: white;
        }
        
        .comparison-table tr:nth-child(even) {
            background-color: var(--background-alt);
        }
        
        .comparison-table tr:hover {
            background-color: rgba(0, 120, 215, 0.05);
        }
        
        .checkmark {
            color: #28a745;
            font-weight: bold;
        }
        
        .x-mark {
            color: #dc3545;
        }
        
        .testimonial-card {
            background-color: white;
            border-radius: 12px;
            padding: 20px;
            box-shadow: 0 4px 15px rgba(0, 0, 0, 0.05);
            margin-bottom: 20px;
            transition: all 0.3s ease;
        }
        
        .testimonial-card:hover {
            transform: translateY(-5px);
            box-shadow: 0 8px 25px rgba(0, 0, 0, 0.1);
        }
        
        .testimonial-avatar {
            width: 50px;
            height: 50px;
            border-radius: 50%;
            object-fit: cover;
            margin-right: 15px;
        }
        
        .testimonial-info {
            display: flex;
            align-items: center;
            margin-bottom: 15px;
        }
        
        .testimonial-name {
            font-weight: bold;
            margin-bottom: 5px;
        }
        
        .testimonial-rating {
            color: #ffc107;
        }
        
        .faq-item {
            margin-bottom: 20px;
            border-bottom: 1px solid #eee;
            padding-bottom: 20px;
        }
        
        .faq-question {
            font-weight: bold;
            cursor: pointer;
            display: flex;
            justify-content: space-between;
            align-items: center;
            padding: 10px 0;
        }
        
        .faq-answer {
            display: none;
            padding: 10px 0;
            color: var(--text-light);
        }
        
        .faq-answer.active {
            display: block;
        }
        
        .download-stats {
            display: flex;
            justify-content: space-around;
            margin: 30px 0;
            flex-wrap: wrap;
        }
        
        .stat-item {
            text-align: center;
            margin: 10px;
            flex: 1;
            min-width: 150px;
        }
        
        .stat-number {
            font-size: 2.5rem;
            font-weight: bold;
            color: var(--primary-color);
            margin-bottom: 10px;
        }
        
        .stat-label {
            color: var(--text-light);
        }
        
        /* 响应式设计 */
        @media (max-width: 768px) {
            .sticky-download-btn {
                bottom: 20px;
                right: 20px;
                padding: 12px 20px;
                font-size: 0.9rem;
            }
            
            .download-modal-content {
                padding: 20px;
            }
            
            .comparison-table {
                font-size: 0.9rem;
            }
            
            .comparison-table th, .comparison-table td {
                padding: 8px 10px;
            }
        }
        
        @media (max-width: 640px) {
            .sticky-download-btn {
                bottom: 15px;
                right: 15px;
                padding: 10px 15px;
                font-size: 0.8rem;
            }
            
            .stat-number {
                font-size: 2rem;
            }
        }