.text-logo {
            font-size: 24px;
            font-weight: 700;
            color: #1a73e8;
            letter-spacing: 1px;
        }
        .text-logo span {
            color: #34a853;
        }
        * {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
            font-family: 'Helvetica Neue', Arial, sans-serif;
        }
        
        body {
            color: #333;
            line-height: 1.6;
            background-color: #f8f9fa;
        }
        
        .container {
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 20px;
        }
        
        /* 头部样式 */
        header {
            background-color: #fff;
            box-shadow: 0 2px 15px rgba(0, 0, 0, 0.1);
            padding: 15px 0;
            position: sticky;
            top: 0;
            z-index: 1000;
        }
        
        .header-container {
            display: flex;
            justify-content: space-between;
            align-items: center;
        }
        
        .logo {
            width: 160px;
            height: auto;
        }
        
        nav ul {
            display: flex;
            list-style: none;
        }
        
        nav ul li {
            margin-left: 35px;
            position: relative;
        }
        
        nav ul li a {
            text-decoration: none;
            color: #2c3e50;
            font-weight: 600;
            font-size: 16px;
            transition: color 0.3s;
            padding: 5px 0;
        }
        
        nav ul li a:hover {
            color: #3498db;
        }
        
        nav ul li a:after {
            content: '';
            position: absolute;
            width: 0;
            height: 2px;
            background: #3498db;
            bottom: 0;
            left: 0;
            transition: width 0.3s;
        }
        
        nav ul li a:hover:after {
            width: 100%;
        }
        
        /* 产品展示部分 */
        .hero {
            padding: 90px 0;
            background: linear-gradient(135deg, #f8f9fa 0%, #e9ecef 100%);
        }
        
        .hero-container {
            display: flex;
            align-items: center;
            justify-content: space-between;
        }
        
        .hero-content {
            flex: 1;
            padding-right: 60px;
        }
        
        .hero-content h1 {
            font-size: 42px;
            margin-bottom: 25px;
            color: #2c3e50;
            font-weight: 700;
            line-height: 1.3;
        }
        
        .hero-content p {
            font-size: 18px;
            margin-bottom: 35px;
            color: #5a6a7e;
            max-width: 90%;
        }
        
        .hero-image {
            flex: 1;
            text-align: center;
            position: relative;
        }
        
        .hero-image img {
            width: 100%;
            max-width: 100%;
            height: 100%;
            object-fit: cover;
            border-radius: 12px;
            box-shadow: 0 25px 50px -12px rgba(0, 0, 0, 0.15);
            transition: transform 0.3s;
        }
        
        .hero-image img:hover {
            transform: translateY(-5px);
        }
        
        .btn {
            display: inline-block;
            padding: 14px 32px;
            border-radius: 6px;
            font-weight: 600;
            text-decoration: none;
            transition: all 0.3s;
            margin-right: 15px;
            margin-bottom: 15px;
            font-size: 16px;
            text-align: center;
        }
        
        .btn-primary {
            background-color: #3498db;
            color: white;
            border: 2px solid #3498db;
        }
        
        .btn-primary:hover {
            background-color: #2980b9;
            border-color: #2980b9;
            transform: translateY(-2px);
            box-shadow: 0 5px 15px rgba(41, 128, 185, 0.3);
        }
        
        .btn-secondary {
            background-color: transparent;
            color: #3498db;
            border: 2px solid #3498db;
        }
        
        .btn-secondary:hover {
            background-color: rgba(52, 152, 219, 0.1);
            transform: translateY(-2px);
            box-shadow: 0 5px 15px rgba(52, 152, 219, 0.1);
        }
        
        /* 产品卡片部分 */
        .products {
            padding: 100px 0;
            background-color: #fff;
        }
        
        .section-title {
            text-align: center;
            margin-bottom: 60px;
        }
        
        .section-title h2 {
            font-size: 36px;
            color: #2c3e50;
            margin-bottom: 15px;
            font-weight: 700;
        }
        
        .section-title p {
            color: #7f8c8d;
            font-size: 18px;
            max-width: 700px;
            margin: 0 auto;
        }
        
        .product-cards {
            display: flex;
            justify-content: space-between;
            flex-wrap: wrap;
            margin-top: 50px;
        }
        
        .product-card {
            width: 31.5%;
            background-color: white;
            border-radius: 12px;
            overflow: hidden;
            box-shadow: 0 10px 30px rgba(0, 0, 0, 0.05);
            transition: all 0.3s ease;
            margin-bottom: 30px;
            border: 1px solid #e0e0e0;
        }
        
        .product-card:hover {
            transform: translateY(-10px);
            box-shadow: 0 15px 35px rgba(0, 0, 0, 0.1);
            border-color: #3498db;
        }
        
        .product-image {
            width: 100%;
            height: 220px;
            object-fit: cover;
            border-bottom: 1px solid #eee;
        }
        
        .product-info {
            padding: 30px;
        }
        
        .product-info h3 {
            font-size: 24px;
            margin-bottom: 15px;
            color: #005aff;
            font-weight: 600;
        }
        
        .product-info p {
            color: #7f8c8d;
            margin-bottom: 20px;
            min-height: 72px;
            line-height: 1.7;
        }
        
        .rating {
            color: #f1c40f;
            margin-bottom: 15px;
            font-size: 18px;
            letter-spacing: 2px;
        }
        
        .price {
            font-size: 28px;
            font-weight: 700;
            color: #000;
            margin-bottom: 25px;
        }
        
        .product-actions {
            display: flex;
            justify-content: space-between;
        }
        
        .product-actions .btn {
            width: 48%;
            padding: 12px;
            margin: 0;
            font-size: 15px;
        }
        
        /* 使用教程部分 */
        .tutorials {
            padding: 100px 0;
            background-color: #f8f9fa;
        }
        
        .tutorial-steps {
            display: flex;
            flex-wrap: wrap;
            justify-content: space-between;
            margin-top: 50px;
        }
        
        .tutorial-step {
            width: 48%;
            background-color: white;
            border-radius: 12px;
            padding: 35px;
            margin-bottom: 30px;
            box-shadow: 0 10px 30px rgba(0, 0, 0, 0.05);
            border: 1px solid #e0e0e0;
            transition: all 0.3s;
        }
        
        .tutorial-step:hover {
            transform: translateY(-5px);
            box-shadow: 0 15px 35px rgba(0, 0, 0, 0.1);
            border-color: #3498db;
        }
        
        .tutorial-step h3 {
            font-size: 22px;
            margin-bottom: 20px;
            color: #2c3e50;
            font-weight: 600;
            display: flex;
            align-items: center;
        }
        
        .tutorial-step p {
            color: #7f8c8d;
            line-height: 1.8;
        }
        
        .step-number {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 36px;
            height: 36px;
            background-color: #3498db;
            color: white;
            border-radius: 50%;
            font-weight: 700;
            margin-right: 15px;
            font-size: 16px;
        }
        
        /* 退款部分 */
        .refund {
            padding: 100px 0;
            background-color: #fff;
        }
        
        .refund-policy {
            background-color: white;
            border-radius: 12px;
            padding: 50px;
            box-shadow: 0 10px 30px rgba(0, 0, 0, 0.05);
            border: 1px solid #e0e0e0;
            margin-top: 50px;
        }
        
        .refund-policy h3 {
            font-size: 24px;
            margin-bottom: 25px;
            color: #2c3e50;
            font-weight: 600;
        }
        
        .refund-policy p {
            margin-bottom: 20px;
            color: #7f8c8d;
            line-height: 1.8;
        }
        
        .refund-policy ul, .refund-policy ol {
            margin-bottom: 30px;
            padding-left: 25px;
        }
        
        .refund-policy li {
            margin-bottom: 12px;
            color: #7f8c8d;
            line-height: 1.8;
        }
        
        /* 文章部分 */
        .articles {
            padding: 100px 0;
            background-color: #f8f9fa;
        }
        
        .article-list {
            display: flex;
            flex-wrap: wrap;
            justify-content: space-between;
            margin-top: 50px;
        }
        
        .article-column {
            width: 48%;
        }
        
        .article-column h3 {
            font-size: 24px;
            color: #2c3e50;
            margin-bottom: 25px;
            padding-bottom: 15px;
            border-bottom: 2px solid #3498db;
            font-weight: 600;
        }
        
        .article-item {
            background-color: white;
            border-radius: 8px;
            padding: 25px;
            margin-bottom: 25px;
            box-shadow: 0 5px 15px rgba(0, 0, 0, 0.05);
            border: 1px solid #e0e0e0;
            transition: all 0.3s;
        }
        
        .article-item:hover {
            transform: translateY(-5px);
            box-shadow: 0 10px 25px rgba(0, 0, 0, 0.1);
            border-color: #3498db;
        }
        
        .article-item a {
            text-decoration: none;
            color: #2c3e50;
            font-weight: 600;
            font-size: 18px;
            transition: color 0.3s;
            display: block;
            margin-bottom: 10px;
        }
        
        .article-item a:hover {
            color: #3498db;
        }
        
        .article-item p {
            color: #7f8c8d;
            font-size: 15px;
            line-height: 1.7;
        }
        
        /* 页脚部分 */
        footer {
            background-color: #2c3e50;
            color: #ecf0f1;
            padding: 80px 0 30px;
        }
        
        .footer-container {
            display: flex;
            flex-wrap: wrap;
            justify-content: space-between;
        }
        
        .footer-column {
            width: 23%;
            margin-bottom: 40px;
        }
        
        .footer-column h3 {
            font-size: 18px;
            margin-bottom: 25px;
            color: #fff;
            font-weight: 600;
            position: relative;
            padding-bottom: 10px;
        }
        
        .footer-column h3:after {
            content: '';
            position: absolute;
            width: 40px;
            height: 2px;
            background: #3498db;
            bottom: 0;
            left: 0;
        }
        
        .footer-column ul {
            list-style: none;
        }
        
        .footer-column ul li {
            margin-bottom: 12px;
        }
        
        .footer-column ul li a {
            color: #bdc3c7;
            text-decoration: none;
            transition: color 0.3s;
            font-size: 15px;
        }
        
        .footer-column ul li a:hover {
            color: #3498db;
            padding-left: 5px;
        }
        
        .copyright {
            text-align: center;
            padding-top: 40px;
            margin-top: 40px;
            border-top: 1px solid #34495e;
            color: #bdc3c7;
            font-size: 14px;
        }
        
        .copyright a {
            color: #3498db;
            text-decoration: none;
            transition: color 0.3s;
        }
        
        .copyright a:hover {
            color: #2980b9;
        }
        
        /* 响应式设计 */
        @media (max-width: 992px) {
            .hero-container {
                flex-direction: column;
            }
            
            .hero-content {
                padding-right: 0;
                margin-bottom: 50px;
                text-align: center;
            }
            
            .hero-content p {
                max-width: 100%;
            }
            
            .hero-buttons {
                justify-content: center;
            }
            
            .product-card {
                width: 48%;
            }
            
            .footer-column {
                width: 48%;
            }
        }
        
        @media (max-width: 768px) {
            nav ul li {
                margin-left: 20px;
            }
            
            .hero-content h1 {
                font-size: 36px;
            }
            
            .product-card, .tutorial-step, .article-column, .footer-column {
                width: 100%;
            }
            
            .tutorial-steps, .article-list {
                flex-direction: column;
            }
            
            .header-container {
                flex-direction: column;
            }
            
            .logo {
                margin-bottom: 20px;
            }
            
            nav ul {
                justify-content: center;
                flex-wrap: wrap;
            }
            
            nav ul li {
                margin: 0 15px 10px;
            }
        }
        
        @media (max-width: 576px) {
            .hero-content h1 {
                font-size: 30px;
            }
            
            .section-title h2 {
                font-size: 30px;
            }
            
            .btn {
                width: 100%;
                margin-right: 0;
            }
            
            .product-actions {
                flex-direction: column;
            }
            
            .product-actions .btn {
                width: 100%;
                margin-bottom: 10px;
            }
            
            .product-actions .btn:last-child {
                margin-bottom: 0;
            }
        }