.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

.product-section-header {
    text-align: center;
    margin-bottom: 50px;
}

.product-section-header h2 {
    font-size: 2.5rem;
    color: #2c3e50;
    margin-bottom: 15px;
    font-weight: 600;
}

.product-section-header p {
    font-size: 1.1rem;
    color: #7f8c8d;
    max-width: 600px;
    margin: 0 auto;
}

/* 按钮样式 */
.product-btn {
    display: inline-block;
    padding: 12px 24px;
    text-decoration: none;
    border-radius: 5px;
    font-weight: 500;
    text-align: center;
    transition: all 0.3s ease;
    border: none;
    cursor: pointer;
    font-size: 14px;
}

.product-btn-primary {
    background: #3498db;
    color: white;
}

.product-btn-primary:hover {
    background: #2980b9;
}

.product-btn-outline {
    background: transparent;
    color: #3498db;
    border: 2px solid #3498db;
}

.product-btn-outline:hover {
    background: #3498db;
    color: white;
}

/* 1. Product Overview Section */
.product-overview {
    padding: 60px 0;
    background: #f8f9fa;
}

.product-overview-content {
    text-align: center;
}

.product-overview-header h2 {
    font-size: 2.5rem;
    color: #2c3e50;
    margin-bottom: 20px;
}

.product-overview-header p {
    font-size: 1.1rem;
    color: #7f8c8d;
    max-width: 700px;
    margin: 0 auto 50px;
}

.product-overview-features {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 30px;
    margin-bottom: 50px;
}

.product-overview-feature {
    padding: 30px;
    background: white;
    border-radius: 8px;
    box-shadow: 0 2px 10px rgba(0,0,0,0.1);
    text-align: center;
}

.product-overview-feature .product-feature-icon {
    width: 60px;
    height: 60px;
    background: #e3f2fd;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 20px;
    font-size: 24px;
    color: #3498db;
}

.product-overview-feature h3 {
    font-size: 1.3rem;
    color: #2c3e50;
    margin-bottom: 15px;
}

.product-overview-feature p {
    color: #7f8c8d;
    line-height: 1.6;
}

.product-overview-stats {
    display: flex;
    justify-content: center;
    gap: 50px;
    flex-wrap: wrap;
}

.product-stat-item {
    text-align: center;
    padding: 20px;
    background: white;
    border-radius: 8px;
    box-shadow: 0 2px 10px rgba(0,0,0,0.1);
}

.product-stat-number {
    display: block;
    font-size: 2.5rem;
    font-weight: 700;
    color: #3498db;
    margin-bottom: 5px;
}

.product-stat-label {
    color: #7f8c8d;
    font-size: 0.9rem;
    text-transform: uppercase;
    letter-spacing: 1px;
}

/* 产品分类网格布局 */
.product-categories-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(380px, 1fr));
    gap: 30px;
    margin-top: 40px;
}

.product-category-item {
    background: white;
    border-radius: 15px;
    overflow: hidden;
    box-shadow: 0 5px 20px rgba(0,0,0,0.08);
    border: 1px solid #f1f3f4;
    transition: all 0.3s ease;
}

.product-category-item:hover {
    transform: translateY(-5px);
    box-shadow: 0 15px 40px rgba(0,0,0,0.15);
}

.product-category-image {
    position: relative;
    height: 200px;
    overflow: hidden;
}

.product-category-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.3s ease;
}

.product-category-item:hover .product-category-image img {
    transform: scale(1.05);
}

.product-category-badge {
    position: absolute;
    top: 15px;
    right: 15px;
    background: rgba(0, 123, 255, 0.9);
    color: white;
    padding: 5px 12px;
    border-radius: 20px;
    font-size: 12px;
    font-weight: 500;
}

.product-category-content {
    padding: 25px;
}

.product-category-header h3 {
    font-size: 1.5rem;
    color: #2c3e50;
    margin-bottom: 8px;
    font-weight: 600;
}

.product-category-subtitle {
    color: #7f8c8d;
    font-size: 0.95rem;
    margin-bottom: 15px;
}

.product-category-description {
    color: #555;
    line-height: 1.6;
    margin-bottom: 20px;
}

.product-category-highlights {
    display: flex;
    flex-wrap: wrap;
    gap: 15px;
    margin-bottom: 25px;
}

.product-highlight-item {
    display: flex;
    align-items: center;
    gap: 8px;
    color: #666;
    font-size: 0.9rem;
}

.product-highlight-item i {
    color: #007bff;
    font-size: 14px;
}

.product-category-actions {
    display: flex;
    flex-direction: column;
    gap: 15px;
}

.product-btn {
    display: inline-block;
    padding: 12px 24px;
    text-decoration: none;
    border-radius: 6px;
    font-weight: 500;
    text-align: center;
    transition: all 0.3s ease;
    border: none;
    cursor: pointer;
    font-size: 14px;
}

.product-btn-primary {
    background: #007bff;
    color: white;
}

.product-btn-primary:hover {
    background: #0056b3;
    transform: translateY(-2px);
}

.product-product-types {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
}

.product-product-types a {
    color: #007bff;
    text-decoration: none;
    font-size: 0.9rem;
    padding: 5px 10px;
    border: 1px solid #e3f2fd;
    border-radius: 15px;
    transition: all 0.3s ease;
}

.product-product-types a:hover {
    background: #007bff;
    color: white;
    border-color: #007bff;
}

/* 响应式设计 */
@media (max-width: 768px) {
    .product-categories-grid {
        grid-template-columns: 1fr;
        gap: 20px;
    }
    
    .product-category-content {
        padding: 20px;
    }
}

/* CTA Section 样式 */
.cta-section {
    background: linear-gradient(135deg, #1e293b 0%, #334155 100%);
    padding: 80px 0;
    text-align: center;
    position: relative;
    color: white;
}

.cta-section::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: url('data:image/svg+xml,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 100 100"><defs><pattern id="dots" width="20" height="20" patternUnits="userSpaceOnUse"><circle cx="10" cy="10" r="1" fill="rgba(255,255,255,0.05)"/></pattern></defs><rect width="100" height="100" fill="url(%23dots)"/></svg>');
    opacity: 0.4;
}

.cta-content {
    position: relative;
    z-index: 2;
}

.cta-content h2 {
    font-size: 2.5rem;
    color: white;
    margin-bottom: 20px;
    font-weight: 600;
    text-shadow: 0 2px 4px rgba(0,0,0,0.2);
}

.cta-content p {
    font-size: 1.2rem;
    color: rgba(255,255,255,0.9);
    margin-bottom: 40px;
    max-width: 600px;
    margin-left: auto;
    margin-right: auto;
    line-height: 1.6;
}

.cta-buttons {
    display: flex;
    gap: 20px;
    justify-content: center;
    flex-wrap: wrap;
}

.btn {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    padding: 15px 30px;
    text-decoration: none;
    border-radius: 8px;
    font-weight: 500;
    font-size: 16px;
    transition: all 0.3s ease;
    border: 2px solid transparent;
    box-shadow: 0 4px 15px rgba(0,0,0,0.2);
}

.btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 25px rgba(0,0,0,0.3);
}

/* 统一按钮颜色 - 都使用蓝色系 */
.btn-email {
    background: #3b82f6;
    color: white;
    border-color: #3b82f6;
}

.btn-email:hover {
    background: #2563eb;
    border-color: #2563eb;
}

.btn-whatsapp {
    background: #3b82f6;
    color: white;
    border-color: #3b82f6;
}

.btn-whatsapp:hover {
    background: #2563eb;
    border-color: #2563eb;
}

/* 响应式设计 */
@media (max-width: 768px) {
    .cta-section {
        padding: 60px 0;
    }
    
    .cta-content h2 {
        font-size: 2rem;
    }
    
    .cta-content p {
        font-size: 1.1rem;
    }
    
    .cta-buttons {
        flex-direction: column;
        align-items: center;
        gap: 15px;
    }
    
    .btn {
        width: 100%;
        max-width: 300px;
        justify-content: center;
    }
}

@media (max-width: 480px) {
    .cta-content h2 {
        font-size: 1.8rem;
    }
    
    .cta-content p {
        font-size: 1rem;
    }
    
    .btn {
        padding: 14px 24px;
        font-size: 15px;
    }
}

/* 3. Product Features Section */
.product-features {
    padding: 60px 0;
    background: #f8f9fa;
}

.product-features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: 30px;
}

.product-feature-item {
    background: white;
    padding: 30px;
    border-radius: 8px;
    box-shadow: 0 3px 15px rgba(0,0,0,0.1);
}

.product-feature-icon {
    width: 50px;
    height: 50px;
    background: #e3f2fd;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 20px;
    font-size: 20px;
    color: #3498db;
}

.product-feature-content h3 {
    font-size: 1.2rem;
    color: #2c3e50;
    margin-bottom: 15px;
}

.product-feature-content p {
    color: #7f8c8d;
    line-height: 1.6;
    margin-bottom: 20px;
}

.product-feature-metric {
    display: flex;
    flex-direction: column;
    gap: 5px;
}

.product-metric-value {
    font-size: 1.5rem;
    font-weight: 700;
    color: #3498db;
}

.product-metric-label {
    font-size: 0.8rem;
    color: #7f8c8d;
    text-transform: uppercase;
    letter-spacing: 1px;
}

/* 4. Product Applications Section */
.product-applications {
    padding: 60px 0;
    background: white;
}

.product-applications-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 30px;
}

.product-application-item {
    background: white;
    border-radius: 8px;
    overflow: hidden;
    box-shadow: 0 3px 15px rgba(0,0,0,0.1);
}

.product-app-image {
    height: 200px;
    overflow: hidden;
}

.product-app-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.3s ease;
}

.product-application-item:hover .product-app-image img {
    transform: scale(1.05);
}

.product-app-content {
    padding: 25px;
}

.product-app-content h3 {
    font-size: 1.2rem;
    color: #2c3e50;
    margin-bottom: 15px;
}

.product-app-content p {
    color: #7f8c8d;
    line-height: 1.6;
    margin-bottom: 20px;
    font-size: 0.9rem;
}

.product-app-features {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    margin-bottom: 20px;
}

.product-app-feature {
    background: #f8f9fa;
    padding: 6px 12px;
    border-radius: 15px;
    font-size: 0.8rem;
    color: #555;
}

.product-app-link {
    color: #3498db;
    text-decoration: none;
    font-size: 0.9rem;
    font-weight: 500;
    display: flex;
    align-items: center;
    gap: 8px;
    transition: color 0.3s ease;
}

.product-app-link:hover {
    color: #2980b9;
}

/* 响应式设计 */
@media (max-width: 1200px) {
    .product-categories-grid {
        grid-template-areas: 
            "windows"
            "doors"
            "curtain"
            "skylights"
            "balcony"
            "custom";
    }
    
    .product-category-item.featured {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 768px) {
    .product-section-header h2 {
        font-size: 2rem;
    }
    
    .product-overview-stats {
        gap: 30px;
    }
    
    .product-features-grid {
        grid-template-columns: 1fr;
    }
    
    .product-applications-grid {
        grid-template-columns: 1fr;
    }
    
    .product-overview,
    .product-categories,
    .product-features,
    .product-applications {
        padding: 40px 0;
    }
}

/* Solution Details 样式 */
.solution-details {
    padding: 80px 0;
    background: white;
}

.solution-details .solution-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 60px;
    align-items: center;
}

.solution-details .solution-text h2 {
    font-size: 2.5rem;
    color: #2c3e50;
    margin-bottom: 20px;
    font-weight: 600;
    line-height: 1.2;
}

.solution-details .solution-text p {
    font-size: 1.1rem;
    color: #6c757d;
    margin-bottom: 30px;
    line-height: 1.8;
}

.solution-details .solution-benefits h3 {
    font-size: 1.5rem;
    color: #2c3e50;
    margin-bottom: 20px;
    font-weight: 600;
}

.solution-details .solution-benefits ul {
    list-style: none;
}

.solution-details .solution-benefits li {
    padding: 12px 0;
    color: #495057;
    position: relative;
    padding-left: 35px;
    line-height: 1.6;
    border-bottom: 1px solid #f1f3f4;
}

.solution-details .solution-benefits li:last-child {
    border-bottom: none;
}

.solution-details .solution-benefits li::before {
    content: '✓';
    position: absolute;
    left: 0;
    top: 12px;
    width: 20px;
    height: 20px;
    background: #28a745;
    color: white;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 12px;
    font-weight: bold;
}

.solution-details .solution-benefits strong {
    color: #2c3e50;
    font-weight: 600;
}

.solution-details .solution-image {
    position: relative;
    border-radius: 15px;
    overflow: hidden;
    box-shadow: 0 15px 40px rgba(0,0,0,0.1);
}

.solution-details .solution-image img {
    width: 100%;
    height: auto;
    display: block;
    transition: transform 0.3s ease;
}

.solution-details .solution-image:hover img {
    transform: scale(1.02);
}

/* Solution Features Grid 样式 */
.solution-features-grid {
    padding: 80px 0;
    background: #f8f9fa;
}

.solution-features-grid h2 {
    text-align: center;
    font-size: 2.5rem;
    color: #2c3e50;
    margin-bottom: 60px;
    font-weight: 600;
    position: relative;
}

.solution-features-grid h2::after {
    content: '';
    position: absolute;
    bottom: -15px;
    left: 50%;
    transform: translateX(-50%);
    width: 80px;
    height: 3px;
    background: linear-gradient(135deg, #667eea, #764ba2);
    border-radius: 2px;
}

.solution-features-container {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 30px;
}

.solution-feature-item {
    background: white;
    padding: 40px 30px;
    border-radius: 20px;
    text-align: center;
    box-shadow: 0 8px 25px rgba(0,0,0,0.08);
    transition: all 0.4s cubic-bezier(0.175, 0.885, 0.32, 1.275);
    border: 1px solid #f1f3f4;
    position: relative;
    overflow: hidden;
}

.solution-feature-item::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(102, 126, 234, 0.05), transparent);
    transition: left 0.6s;
}

.solution-feature-item:hover::before {
    left: 100%;
}

.solution-feature-item:hover {
    transform: translateY(-10px);
    box-shadow: 0 20px 50px rgba(0,0,0,0.15);
    border-color: #e3f2fd;
}

.solution-feature-icon {
    width: 90px;
    height: 90px;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 25px;
    position: relative;
    transition: all 0.3s ease;
}

.solution-feature-item:hover .solution-feature-icon {
    transform: scale(1.1);
    box-shadow: 0 10px 30px rgba(102, 126, 234, 0.3);
}

.solution-feature-icon i {
    font-size: 2.2rem;
    color: white;
    transition: transform 0.3s ease;
}

.solution-feature-item:hover .solution-feature-icon i {
    transform: scale(1.1);
}

.solution-feature-item h3 {
    font-size: 1.4rem;
    color: #2c3e50;
    margin-bottom: 15px;
    font-weight: 600;
    transition: color 0.3s ease;
}

.solution-feature-item:hover h3 {
    color: #667eea;
}

.solution-feature-item p {
    color: #6c757d;
    line-height: 1.7;
    font-size: 0.95rem;
}

/* 响应式设计 */
@media (max-width: 1024px) {
    .solution-details .solution-content {
        gap: 40px;
    }
    
    .solution-features-container {
        grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
        gap: 25px;
    }
}

@media (max-width: 768px) {
    .solution-details {
        padding: 60px 0;
    }
    
    .solution-details .solution-content {
        grid-template-columns: 1fr;
        gap: 40px;
        text-align: center;
    }
    
    .solution-details .solution-text h2 {
        font-size: 2rem;
    }
    
    .solution-details .solution-benefits li {
        text-align: left;
    }
    
    .solution-features-grid {
        padding: 60px 0;
    }
    
    .solution-features-grid h2 {
        font-size: 2rem;
        margin-bottom: 40px;
    }
    
    .solution-features-container {
        grid-template-columns: 1fr;
        gap: 20px;
    }
    
    .solution-feature-item {
        padding: 30px 20px;
    }
}

@media (max-width: 480px) {
    .solution-details {
        padding: 40px 0;
    }
    
    .solution-details .solution-text h2 {
        font-size: 1.8rem;
    }
    
    .solution-details .solution-text p {
        font-size: 1rem;
    }
    
    .solution-details .solution-benefits h3 {
        font-size: 1.3rem;
    }
    
    .solution-features-grid {
        padding: 40px 0;
    }
    
    .solution-features-grid h2 {
        font-size: 1.8rem;
    }
    
    .solution-feature-item {
        padding: 25px 15px;
    }
    
    .solution-feature-icon {
        width: 70px;
        height: 70px;
    }
    
    .solution-feature-icon i {
        font-size: 1.8rem;
    }
    
    .solution-feature-item h3 {
        font-size: 1.2rem;
    }
}



.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

/* 面包屑导航 */
.breadcrumb {
    background: #f8f9fa;
    padding: 15px 0;
    border-bottom: 1px solid #e9ecef;
    margin-bottom: 30px;
}

.breadcrumb-links {
    display: flex;
    align-items: center;
    gap: 10px;
}

.breadcrumb-links a {
    color: #007bff;
    text-decoration: none;
    transition: color 0.3s;
}

.breadcrumb-links a:hover {
    color: #0056b3;
}

.breadcrumb-links .separator {
    color: #6c757d;
}

.breadcrumb-links .current {
    color: #495057;
    font-weight: 500;
}



.page-header h1 {
    font-size: 3rem;
    margin-bottom: 20px;
    font-weight: 600;
}

.page-header p {
    font-size: 1.3rem;
    opacity: 0.9;
    max-width: 600px;
    margin: 0 auto;
}

/* 概述区域 */
.documentation-overview,
.installation-overview,
.maintenance-overview,
.faq-overview {
    padding: 60px 0;
    background: #f8f9fa;
    margin-bottom: 60px;
}

.overview-content {
    text-align: center;
}

.overview-content h2 {
    font-size: 2.5rem;
    color: #2c3e50;
    margin-bottom: 20px;
    font-weight: 600;
}

.overview-content p {
    font-size: 1.2rem;
    color: #6c757d;
    max-width: 800px;
    margin: 0 auto;
    line-height: 1.8;
}

/* 分类网格 */
.documentation-categories,
.installation-categories,
.maintenance-categories,
.faq-categories {
    padding: 60px 0;
}

.categories-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 30px;
}

.doc-category,
.install-category,
.maintenance-category,
.faq-category {
    background: white;
    padding: 40px 30px;
    border-radius: 20px;
    text-align: center;
    box-shadow: 0 8px 25px rgba(0,0,0,0.08);
    transition: all 0.3s ease;
    border: 1px solid #f1f3f4;
}

.doc-category:hover,
.install-category:hover,
.maintenance-category:hover,
.faq-category:hover {
    transform: translateY(-10px);
    box-shadow: 0 20px 50px rgba(0,0,0,0.15);
    border-color: #e3f2fd;
}

.category-icon {
    width: 80px;
    height: 80px;
    background: linear-gradient(135deg, #667eea, #764ba2);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 25px;
    transition: all 0.3s ease;
}

.doc-category:hover .category-icon,
.install-category:hover .category-icon,
.maintenance-category:hover .category-icon,
.faq-category:hover .category-icon {
    transform: scale(1.1);
    box-shadow: 0 10px 30px rgba(102, 126, 234, 0.3);
}

.category-icon i {
    font-size: 2rem;
    color: white;
}

.doc-category h3,
.install-category h3,
.maintenance-category h3,
.faq-category h3 {
    font-size: 1.4rem;
    color: #2c3e50;
    margin-bottom: 15px;
    font-weight: 600;
}

.doc-category p,
.install-category p,
.maintenance-category p,
.faq-category p {
    color: #6c757d;
    margin-bottom: 25px;
    line-height: 1.6;
}

/* Solution Details 样式 */
.solution-details {
    padding: 80px 0;
    background: white;
}

.solution-details .solution-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 60px;
    align-items: center;
}

.solution-details .solution-text h2 {
    font-size: 2.5rem;
    color: #2c3e50;
    margin-bottom: 20px;
    font-weight: 600;
    line-height: 1.2;
}

.solution-details .solution-text p {
    font-size: 1.1rem;
    color: #6c757d;
    margin-bottom: 30px;
    line-height: 1.8;
}

.solution-details .solution-benefits h3 {
    font-size: 1.5rem;
    color: #2c3e50;
    margin-bottom: 20px;
    font-weight: 600;
}

.solution-details .solution-benefits ul {
    list-style: none;
}

.solution-details .solution-benefits li {
    padding: 12px 0;
    color: #495057;
    position: relative;
    padding-left: 35px;
    line-height: 1.6;
    border-bottom: 1px solid #f1f3f4;
}

.solution-details .solution-benefits li:last-child {
    border-bottom: none;
}

.solution-details .solution-benefits li::before {
    content: '✓';
    position: absolute;
    left: 0;
    top: 12px;
    width: 20px;
    height: 20px;
    background: #28a745;
    color: white;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 12px;
    font-weight: bold;
}

.solution-details .solution-benefits strong {
    color: #2c3e50;
    font-weight: 600;
}

.solution-details .solution-image {
    position: relative;
    border-radius: 15px;
    overflow: hidden;
    box-shadow: 0 15px 40px rgba(0,0,0,0.1);
}

.solution-details .solution-image img {
    width: 100%;
    height: auto;
    display: block;
    transition: transform 0.3s ease;
}

.solution-details .solution-image:hover img {
    transform: scale(1.02);
}

/* Solution Features Grid 样式 */
.solution-features-grid {
    padding: 80px 0;
    background: #f8f9fa;
}

.solution-features-grid h2 {
    text-align: center;
    font-size: 2.5rem;
    color: #2c3e50;
    margin-bottom: 60px;
    font-weight: 600;
    position: relative;
}

.solution-features-grid h2::after {
    content: '';
    position: absolute;
    bottom: -15px;
    left: 50%;
    transform: translateX(-50%);
    width: 80px;
    height: 3px;
    background: linear-gradient(135deg, #667eea, #764ba2);
    border-radius: 2px;
}

.solution-features-container {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 30px;
}

.solution-feature-item {
    background: white;
    padding: 40px 30px;
    border-radius: 20px;
    text-align: center;
    box-shadow: 0 8px 25px rgba(0,0,0,0.08);
    transition: all 0.4s cubic-bezier(0.175, 0.885, 0.32, 1.275);
    border: 1px solid #f1f3f4;
    position: relative;
    overflow: hidden;
}

.solution-feature-item::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(102, 126, 234, 0.05), transparent);
    transition: left 0.6s;
}

.solution-feature-item:hover::before {
    left: 100%;
}

.solution-feature-item:hover {
    transform: translateY(-10px);
    box-shadow: 0 20px 50px rgba(0,0,0,0.15);
    border-color: #e3f2fd;
}

.solution-feature-icon {
    width: 90px;
    height: 90px;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 25px;
    position: relative;
    transition: all 0.3s ease;
}

.solution-feature-item:hover .solution-feature-icon {
    transform: scale(1.1);
    box-shadow: 0 10px 30px rgba(102, 126, 234, 0.3);
}

.solution-feature-icon i {
    font-size: 2.2rem;
    color: white;
    transition: transform 0.3s ease;
}

.solution-feature-item:hover .solution-feature-icon i {
    transform: scale(1.1);
}

.solution-feature-item h3 {
    font-size: 1.4rem;
    color: #2c3e50;
    margin-bottom: 15px;
    font-weight: 600;
    transition: color 0.3s ease;
}

.solution-feature-item:hover h3 {
    color: #667eea;
}

.solution-feature-item p {
    color: #6c757d;
    line-height: 1.7;
    font-size: 0.95rem;
}

/* 按钮样式 */
.btn {
    display: inline-block;
    padding: 12px 24px;
    text-decoration: none;
    border-radius: 6px;
    font-weight: 500;
    text-align: center;
    transition: all 0.3s ease;
    border: 2px solid transparent;
    cursor: pointer;
    font-size: 14px;
}

.btn-primary {
    background: #007bff;
    color: white;
    border-color: #007bff;
}

.btn-primary:hover {
    background: #0056b3;
    border-color: #0056b3;
    transform: translateY(-2px);
}

/* CTA Section 样式 */
.cta-section {
    background: linear-gradient(135deg, #1e293b 0%, #334155 100%);
    padding: 80px 0;
    text-align: center;
    position: relative;
    color: white;
}

.cta-section::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: url('data:image/svg+xml,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 100 100"><defs><pattern id="dots" width="20" height="20" patternUnits="userSpaceOnUse"><circle cx="10" cy="10" r="1" fill="rgba(255,255,255,0.05)"/></pattern></defs><rect width="100" height="100" fill="url(%23dots)"/></svg>');
    opacity: 0.4;
}

.cta-content {
    position: relative;
    z-index: 2;
}

.cta-content h2 {
    font-size: 2.5rem;
    color: white;
    margin-bottom: 20px;
    font-weight: 600;
    text-shadow: 0 2px 4px rgba(0,0,0,0.2);
}

.cta-content p {
    font-size: 1.2rem;
    color: rgba(255,255,255,0.9);
    margin-bottom: 40px;
    max-width: 600px;
    margin-left: auto;
    margin-right: auto;
    line-height: 1.6;
}

.cta-buttons {
    display: flex;
    gap: 20px;
    justify-content: center;
    flex-wrap: wrap;
}

.btn-email {
    background: #fbbf24;
    color: #1a1a1a;
    border-color: #fbbf24;
}

.btn-email:hover {
    background: #f59e0b;
    border-color: #f59e0b;
    transform: translateY(-2px);
}

.btn-whatsapp {
    background: #25d366;
    color: white;
    border-color: #25d366;
}

.btn-whatsapp:hover {
    background: #128c7e;
    border-color: #128c7e;
    transform: translateY(-2px);
}

/* 响应式设计 */
@media (max-width: 1024px) {
    .solution-details .solution-content {
        gap: 40px;
    }
    
    .solution-features-container {
        grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
        gap: 25px;
    }
    
    .categories-grid {
        grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
        gap: 25px;
    }
}

@media (max-width: 768px) {
    .page-header {
        padding: 60px 0;
    }
    
    .page-header h1 {
        font-size: 2.5rem;
    }
    
    .overview-content h2 {
        font-size: 2rem;
    }
    
    .solution-details {
        padding: 60px 0;
    }
    
    .solution-details .solution-content {
        grid-template-columns: 1fr;
        gap: 40px;
        text-align: center;
    }
    
    .solution-details .solution-text h2 {
        font-size: 2rem;
    }
    
    .solution-details .solution-benefits li {
        text-align: left;
    }
    
    .solution-features-grid {
        padding: 60px 0;
    }
    
    .solution-features-grid h2 {
        font-size: 2rem;
        margin-bottom: 40px;
    }
    
    .solution-features-container {
        grid-template-columns: 1fr;
        gap: 20px;
    }
    
    .solution-feature-item {
        padding: 30px 20px;
    }
    
    .categories-grid {
        grid-template-columns: 1fr;
        gap: 20px;
    }
    
    .doc-category,
    .install-category,
    .maintenance-category,
    .faq-category {
        padding: 30px 20px;
    }
    
    .cta-buttons {
        flex-direction: column;
        align-items: center;
        gap: 15px;
    }
    
    .btn {
        width: 100%;
        max-width: 300px;
        justify-content: center;
    }
}

@media (max-width: 480px) {
    .page-header h1 {
        font-size: 2rem;
    }
    
    .page-header p {
        font-size: 1.1rem;
    }
    
    .overview-content h2 {
        font-size: 1.8rem;
    }
    
    .overview-content p {
        font-size: 1rem;
    }
    
    .solution-details {
        padding: 40px 0;
    }
    
    .solution-details .solution-text h2 {
        font-size: 1.8rem;
    }
    
    .solution-details .solution-text p {
        font-size: 1rem;
    }
    
    .solution-details .solution-benefits h3 {
        font-size: 1.3rem;
    }
    
    .solution-features-grid {
        padding: 40px 0;
    }
    
    .solution-features-grid h2 {
        font-size: 1.8rem;
    }
    
    .solution-feature-item {
        padding: 25px 15px;
    }
    
    .solution-feature-icon {
        width: 70px;
        height: 70px;
    }
    
    .solution-feature-icon i {
        font-size: 1.8rem;
    }
    
    .solution-feature-item h3 {
        font-size: 1.2rem;
    }
    
    .doc-category,
    .install-category,
    .maintenance-category,
    .faq-category {
        padding: 25px 15px;
    }
    
    .category-icon {
        width: 60px;
        height: 60px;
    }
    
    .category-icon i {
        font-size: 1.5rem;
    }
}