:root {
            --primary: #4361ee;
            --secondary: #3f37c9;
            --accent: #4895ef;
            --light: #f8f9fa;
            --dark: #212529;
        }
        
        body {
            font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
            color: #333;
            overflow-x: hidden;
        }
        
        /* 头部样式 */
                .logo {
            height: 50px;
        }
        .navbar {
            background: white;
            box-shadow: 0 2px 10px rgba(0,0,0,0.1);
            padding: 15px 0;
        }
        
        .navbar-brand {
            font-weight: 700;
            color: var(--primary);
            font-size: 1.8rem;
        }
        
        .navbar-nav .nav-link {
            font-weight: 500;
            color: var(--dark);
            margin: 0 10px;
            transition: all 0.3s;
            position: relative;
        }
        
        .navbar-nav .nav-link:hover {
            color: var(--primary);
        }
        
        .navbar-nav .nav-link:hover::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 0;
            width: 100%;
            height: 2px;
            background: var(--primary);
        }
        
        /* 主横幅区域 */
        .hero-section {
            background: linear-gradient(135deg, #e0f7fa 0%, #bbdefb 100%);
            padding: 80px 0 60px;
            position: relative;
            overflow: hidden;
        }
        
        .hero-content {
            position: relative;
            z-index: 2;
        }
        
        .hero-title {
            font-size: 3.2rem;
            font-weight: 800;
            line-height: 1.2;
            margin-bottom: 20px;
            color: var(--dark);
        }
        
        .hero-subtitle {
            font-size: 1.2rem;
            margin-bottom: 30px;
            color: #555;
            max-width: 600px;
        }
        
        .btn-primary {
            background: var(--primary);
            border: none;
            padding: 12px 30px;
            font-weight: 600;
            transition: all 0.3s;
        }
        
        .btn-primary:hover {
            background: var(--secondary);
            transform: translateY(-3px);
            box-shadow: 0 5px 15px rgba(0,0,0,0.1);
        }
        
        .btn-outline-primary {
            border-color: var(--primary);
            color: var(--primary);
            padding: 12px 30px;
            font-weight: 600;
            transition: all 0.3s;
        }
        
        .btn-outline-primary:hover {
            background: var(--primary);
            color: white;
            transform: translateY(-3px);
            box-shadow: 0 5px 15px rgba(0,0,0,0.1);
        }
        
        .refund-badge {
            display: inline-flex;
            align-items: center;
            background: rgba(255,255,255,0.7);
            padding: 8px 15px;
            border-radius: 30px;
            margin-top: 20px;
            font-weight: 500;
            backdrop-filter: blur(5px);
        }
        
        .refund-badge i {
            color: #4CAF50;
            margin-right: 8px;
            font-size: 1.2rem;
        }
        
        .hero-image {
            border-radius: 10px;
            box-shadow: 0 15px 30px rgba(0,0,0,0.15);
            transition: transform 0.3s;
            overflow: hidden;
        }
        
        .hero-image:hover {
            transform: scale(1.02);
        }
        
        /* 商品部分 */
        .products-section {
            padding: 80px 0;
            background: white;
        }
        
        .section-title {
            text-align: center;
            margin-bottom: 50px;
            font-weight: 700;
            color: var(--dark);
            position: relative;
        }
        
        .section-title::after {
            content: '';
            position: absolute;
            bottom: -15px;
            left: 50%;
            transform: translateX(-50%);
            width: 80px;
            height: 4px;
            background: var(--primary);
            border-radius: 2px;
        }
        
        .product-card {
            border: none;
            border-radius: 10px;
            overflow: hidden;
            transition: all 0.3s;
            margin-bottom: 30px;
            box-shadow: 0 5px 15px rgba(0,0,0,0.05);
        }
        
        .product-card:hover {
            transform: translateY(-10px);
            box-shadow: 0 15px 30px rgba(0,0,0,0.1);
        }
        
        .product-img {
            height: 200px;
            object-fit: cover;
            border-bottom: 1px solid #eee;
        }
        
        .product-title {
            font-weight: 600;
            margin: 15px 0 10px;
            color: var(--dark);
        }
        
        .product-price {
            font-weight: 700;
            font-size: 1.2rem;
            color: var(--primary);
        }
        
        .product-buttons {
            display: flex;
            gap: 10px;
            margin-top: 15px;
        }
        
        .btn-sm {
            padding: 8px 15px;
            font-size: 0.9rem;
        }
        
        /* 使用说明部分 */
        .instructions-section {
            background: #f8f9fa;
            padding: 80px 0;
        }
        
        .steps-container {
            background: white;
            border-radius: 10px;
            box-shadow: 0 10px 30px rgba(0,0,0,0.05);
            padding: 40px;
        }
        
        .step-item {
            display: flex;
            align-items: center;
            padding: 20px;
            border-radius: 10px;
            margin-bottom: 15px;
            transition: all 0.3s;
            background: rgba(67, 97, 238, 0.05);
        }
        
        .step-item:hover {
            background: rgba(67, 97, 238, 0.1);
            transform: translateX(5px);
        }
        
        .step-number {
            width: 40px;
            height: 40px;
            background: var(--primary);
            color: white;
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            font-weight: 700;
            margin-right: 20px;
            flex-shrink: 0;
        }
        
        .step-content h4 {
            font-weight: 600;
            margin-bottom: 5px;
            color: var(--dark);
        }
        
        /* 新闻与FAQ部分 */
        .news-faq-section {
            padding: 80px 0;
            background: white;
        }
        
        .news-card {
            border: none;
            border-radius: 10px;
            overflow: hidden;
            transition: all 0.3s;
            margin-bottom: 20px;
            box-shadow: 0 5px 15px rgba(0,0,0,0.05);
        }
        
        .news-card:hover {
            transform: translateY(-5px);
            box-shadow: 0 10px 25px rgba(0,0,0,0.1);
        }
        
        .news-date {
            font-size: 0.85rem;
            color: #777;
            margin-bottom: 10px;
        }
        
        .accordion-item {
            margin-bottom: 15px;
            border: none;
            border-radius: 10px !important;
            overflow: hidden;
            box-shadow: 0 3px 10px rgba(0,0,0,0.05);
        }
        
        .accordion-button {
            font-weight: 600;
            border-radius: 10px !important;
        }
        
        .accordion-button:not(.collapsed) {
            background: rgba(67, 97, 238, 0.1);
            color: var(--primary);
        }
        
        /* 工具下载部分 */
        .tools-section {
            background: linear-gradient(135deg, #f0f9ff 0%, #e0f7fa 100%);
            padding: 80px 0;
        }
        
        .tool-card {
            background: white;
            border-radius: 10px;
            padding: 30px;
            text-align: center;
            height: 100%;
            transition: all 0.3s;
            box-shadow: 0 5px 15px rgba(0,0,0,0.05);
        }
        
        .tool-card:hover {
            transform: translateY(-10px);
            box-shadow: 0 15px 30px rgba(0,0,0,0.1);
        }
        
        .tool-icon {
            width: 80px;
            height: 80px;
            display: flex;
            align-items: center;
            justify-content: center;
            background: rgba(67, 97, 238, 0.1);
            border-radius: 50%;
            margin: 0 auto 20px;
            font-size: 2rem;
            color: var(--primary);
        }
        
        /* 页脚部分 */
        .footer {
            background: var(--dark);
            color: rgba(255,255,255,0.7);
            padding: 60px 0 30px;
        }
        
        .footer-title {
            color: white;
            font-weight: 600;
            margin-bottom: 20px;
            font-size: 1.2rem;
        }
        
        .footer-links a {
            display: block;
            color: rgba(255,255,255,0.7);
            text-decoration: none;
            margin-bottom: 10px;
            transition: all 0.3s;
        }
        
        .footer-links a:hover {
            color: white;
            transform: translateX(5px);
        }
        
        .social-icons {
            display: flex;
            gap: 15px;
            margin-top: 20px;
        }
        
        .social-icons a {
            width: 40px;
            height: 40px;
            border-radius: 50%;
            background: rgba(255,255,255,0.1);
            display: flex;
            align-items: center;
            justify-content: center;
            color: white;
            text-decoration: none;
            transition: all 0.3s;
        }
        
        .social-icons a:hover {
            background: var(--primary);
            transform: translateY(-3px);
        }
        
        .copyright {
            text-align: center;
            padding-top: 30px;
            margin-top: 40px;
            border-top: 1px solid rgba(255,255,255,0.1);
        }
        
        /* 响应式调整 */
        @media (max-width: 768px) {
            .hero-title {
                font-size: 2.5rem;
            }
            
            .hero-buttons {
                flex-direction: column;
                gap: 15px;
            }
            
            .hero-buttons .btn {
                width: 100%;
            }
        }