/* 响应式Hub+Spoke样式 */
.hub-container {
    max-width: 1400px;
    margin: 0 auto;
    padding: 0;
    font-family: 'Arial', sans-serif;
    line-height: 1.6;
}

/* 通用样式 */
.section-badge {
    display: inline-block;
    background: linear-gradient(135deg, #007bff, #0056b3);
    color: white;
    padding: 8px 20px;
    border-radius: 25px;
    font-size: 0.9rem;
    font-weight: 600;
    margin-bottom: 20px;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.section-header {
    text-align: center;
    margin-bottom: 60px;
    padding: 0 20px;
}

.section-header h2 {
    font-size: 2.5rem;
    color: #2c3e50;
    margin-bottom: 15px;
    font-weight: 700;
}

.section-header p {
    font-size: 1.2rem;
    color: #666;
    max-width: 600px;
    margin: 0 auto;
}

/* 英雄区域样式 */
.hero-section {
    background: linear-gradient(135deg, #f8f9fa 0%, #e9ecef 100%);
    padding: 100px 0;
    position: relative;
    overflow: hidden;
}

.hero-section::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(135deg, #f8f9fa 0%, #e9ecef 100%);
    z-index: -1;
}

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

.hero-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 80px;
    align-items: center;
}

/* 左侧内容区域 */
.hero-content {
    padding-right: 40px;
}

.badge {
    margin-bottom: 24px;
}

.badge span {
    background: linear-gradient(135deg, #28a745, #20c997);
    color: white;
    padding: 10px 24px;
    border-radius: 30px;
    font-size: 0.9rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    display: inline-block;
    box-shadow: 0 4px 15px rgba(40, 167, 69, 0.3);
}

.hero-content h1 {
    font-size: 3.2rem;
    color: #2c3e50;
    margin-bottom: 24px;
    font-weight: 700;
    line-height: 1.1;
}

.hero-content p {
    font-size: 1.3rem;
    color: #6c757d;
    margin-bottom: 40px;
    line-height: 1.6;
}

/* 统计数据 */
.stats {
    display: flex;
    gap: 40px;
    margin-bottom: 50px;
}

.stat {
    text-align: center;
}

.stat .number {
    display: block;
    font-size: 2.5rem;
    font-weight: 700;
    color: #007bff;
    line-height: 1;
}

.stat .label {
    display: block;
    font-size: 0.9rem;
    color: #6c757d;
    font-weight: 500;
    margin-top: 8px;
}

/* 按钮区域 */
.buttons {
    display: flex;
    gap: 20px;
    flex-wrap: wrap;
}

.btn {
    padding: 16px 32px;
    border-radius: 35px;
    text-decoration: none;
    font-weight: 600;
    font-size: 1rem;
    transition: all 0.3s ease;
    display: inline-block;
    border: none;
    cursor: pointer;
    text-align: center;
}

.btn-primary {
    background: linear-gradient(135deg, #007bff, #0056b3);
    color: white;
    box-shadow: 0 8px 25px rgba(0, 123, 255, 0.3);
}

.btn-primary:hover {
    transform: translateY(-3px);
    box-shadow: 0 12px 35px rgba(0, 123, 255, 0.4);
    color: white;
    text-decoration: none;
}

.btn-outline {
    background: white;
    color: #007bff;
    border: 2px solid #007bff;
    box-shadow: 0 8px 25px rgba(0, 0, 0, 0.1);
}

.btn-outline:hover {
    background: #007bff;
    color: white;
    transform: translateY(-3px);
    box-shadow: 0 12px 35px rgba(0, 123, 255, 0.2);
    text-decoration: none;
}

/* 右侧视觉区域 */
.hero-visual {
    padding-left: 40px;
}

.image-card {
    position: relative;
    background: white;
    border-radius: 25px;
    padding: 30px;
    box-shadow: 0 25px 50px rgba(0, 0, 0, 0.15);
    overflow: hidden;
    transition: all 0.4s ease;
}

.image-card:hover {
    transform: translateY(-10px);
    box-shadow: 0 35px 70px rgba(0, 0, 0, 0.2);
}

.image-card img {
    width: 100%;
    height: auto;
    border-radius: 20px;
    display: block;
}

/* 卡片覆盖层 */
.card-overlay {
    position: absolute;
    bottom: 30px;
    left: 30px;
    right: 30px;
    background: linear-gradient(135deg, rgba(0, 0, 0, 0.85), rgba(0, 0, 0, 0.7));
    color: white;
    padding: 25px;
    border-radius: 20px;
    backdrop-filter: blur(15px);
}

.card-overlay h3 {
    font-size: 1.3rem;
    font-weight: 700;
    margin-bottom: 8px;
}

.card-overlay p {
    font-size: 1rem;
    opacity: 0.9;
    margin: 0;
}

/* 响应式设计 */
@media (max-width: 1200px) {
    .hero-grid {
        gap: 60px;
    }
    
    .hero-content h1 {
        font-size: 2.8rem;
    }
}

@media (max-width: 992px) {
    .hero-section {
        padding: 80px 0;
    }
    
    .hero-grid {
        gap: 50px;
    }
    
    .hero-content {
        padding-right: 20px;
    }
    
    .hero-visual {
        padding-left: 20px;
    }
    
    .hero-content h1 {
        font-size: 2.5rem;
    }
    
    .stats {
        gap: 30px;
    }
}

@media (max-width: 768px) {
    .hero-section {
        padding: 60px 0;
    }
    
    .container {
        padding: 0 15px;
    }
    
    .hero-grid {
        grid-template-columns: 1fr;
        gap: 50px;
        text-align: center;
    }
    
    .hero-content {
        padding-right: 0;
    }
    
    .hero-visual {
        padding-left: 0;
    }
    
    .hero-content h1 {
        font-size: 2.2rem;
    }
    
    .hero-content p {
        font-size: 1.2rem;
    }
    
    .stats {
        justify-content: center;
        gap: 25px;
    }
    
    .buttons {
        justify-content: center;
    }
}

@media (max-width: 576px) {
    .hero-section {
        padding: 50px 0;
    }
    
    .hero-content h1 {
        font-size: 1.9rem;
    }
    
    .hero-content p {
        font-size: 1.1rem;
    }
    
    .stats {
        flex-direction: column;
        gap: 20px;
    }
    
    .stat .number {
        font-size: 2rem;
    }
    
    .buttons {
        flex-direction: column;
        align-items: center;
    }
    
    .btn {
        width: 100%;
        max-width: 280px;
    }
    
    .image-card {
        padding: 20px;
    }
    
    .card-overlay {
        bottom: 20px;
        left: 20px;
        right: 20px;
        padding: 20px;
    }
}

/* 优势区域 */
.benefits-section {
    padding: 80px 20px;
    background: white;
}

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

.benefit-card {
    background: white;
    padding: 40px 30px;
    border-radius: 15px;
    text-align: center;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.1);
    transition: all 0.3s ease;
    border: 1px solid #f0f0f0;
    position: relative;
    overflow: hidden;
}

.benefit-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: linear-gradient(90deg, #007bff, #0056b3);
}

.benefit-card:hover {
    transform: translateY(-10px);
    box-shadow: 0 20px 40px rgba(0, 123, 255, 0.15);
}

.benefit-icon {
    width: 80px;
    height: 80px;
    background: linear-gradient(135deg, #007bff, #0056b3);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 25px;
    color: white;
    font-size: 2rem;
}

.benefit-card h3 {
    font-size: 1.4rem;
    color: #2c3e50;
    margin-bottom: 15px;
    font-weight: 600;
}

.benefit-card p {
    color: #666;
    font-size: 1rem;
    line-height: 1.6;
    margin-bottom: 20px;
}

.benefit-stats {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 5px;
}

.benefit-stats .stat {
    font-size: 1.5rem;
    font-weight: 700;
    color: #007bff;
}

.benefit-stats .label {
    font-size: 0.9rem;
    color: #666;
    font-weight: 500;
}

/* 应用场景 */
.applications-section {
    padding: 80px 20px;
    background: #f8f9fa;
}

.applications-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 30px;
}

.application-card {
    background: white;
    border-radius: 15px;
    overflow: hidden;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.1);
    transition: all 0.3s ease;
}

.application-card:hover {
    transform: translateY(-10px);
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.15);
}

.application-image {
    position: relative;
    overflow: hidden;
}

.application-image img {
    width: 100%;
    height: 200px;
    object-fit: cover;
    transition: transform 0.3s ease;
}

.application-card:hover .application-image img {
    transform: scale(1.05);
}

.application-overlay {
    position: absolute;
    top: 20px;
    right: 20px;
    background: rgba(0, 123, 255, 0.9);
    color: white;
    padding: 10px 15px;
    border-radius: 20px;
    text-align: center;
}

.application-count {
    display: block;
    font-size: 1.2rem;
    font-weight: 700;
}

.application-label {
    font-size: 0.8rem;
    opacity: 0.9;
}

.application-content {
    padding: 30px;
}

.application-content h3 {
    font-size: 1.3rem;
    color: #2c3e50;
    margin-bottom: 10px;
    font-weight: 600;
}

.application-content p {
    color: #666;
    margin-bottom: 20px;
    font-size: 1rem;
}

.application-content ul {
    list-style: none;
    padding: 0;
    margin-bottom: 25px;
}

.application-content li {
    padding: 5px 0;
    color: #666;
    font-size: 0.95rem;
}

.application-content li:before {
    content: '✓';
    color: #28a745;
    font-weight: bold;
    margin-right: 10px;
}

.application-link {
    color: #007bff;
    text-decoration: none;
    font-weight: 600;
    font-size: 1rem;
    transition: all 0.3s ease;
}

.application-link:hover {
    color: #0056b3;
    text-decoration: underline;
}

/* 学习指南 */
.guides-section {
    padding: 80px 20px;
    background: white;
}

.guides-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: 30px;
}

.guide-card {
    background: white;
    padding: 30px;
    border-radius: 15px;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.1);
    transition: all 0.3s ease;
    border-left: 5px solid #007bff;
    position: relative;
}

.guide-card:hover {
    transform: translateY(-10px);
    box-shadow: 0 20px 40px rgba(0, 123, 255, 0.15);
}

.guide-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 20px;
}

.guide-icon {
    width: 60px;
    height: 60px;
    background: linear-gradient(135deg, #007bff, #0056b3);
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-size: 1.5rem;
}

.guide-meta {
    display: flex;
    flex-direction: column;
    align-items: flex-end;
    gap: 5px;
}

.guide-category {
    background: #e3f2fd;
    color: #007bff;
    padding: 4px 12px;
    border-radius: 15px;
    font-size: 0.8rem;
    font-weight: 600;
}

.guide-read-time {
    color: #666;
    font-size: 0.8rem;
}

.guide-card h3 {
    font-size: 1.3rem;
    color: #2c3e50;
    margin-bottom: 15px;
    font-weight: 600;
}

.guide-card p {
    color: #666;
    margin-bottom: 20px;
    font-size: 1rem;
    line-height: 1.6;
}

.guide-features {
    margin-bottom: 25px;
}

.feature-tag {
    display: inline-block;
    background: #e3f2fd;
    color: #007bff;
    padding: 5px 12px;
    border-radius: 20px;
    font-size: 0.85rem;
    margin: 5px 5px 5px 0;
    font-weight: 500;
}

.guide-link {
    display: inline-flex;
    align-items: center;
    color: #007bff;
    text-decoration: none;
    font-weight: 600;
    font-size: 1rem;
    transition: all 0.3s ease;
}

.guide-link:hover {
    color: #0056b3;
    transform: translateX(5px);
}

.guide-link i {
    margin-left: 8px;
    transition: transform 0.3s ease;
}

.guide-link:hover i {
    transform: translateX(3px);
}

/* 产品区域样式 */
.products-section {
    padding: 100px 0;
    background: #f8f9fa;
    position: relative;
}

.container {
    max-width: 1400px;
    margin: 0 auto;
    padding: 0 20px;
}

/* 区域标题 */
.section-header {
    text-align: center;
    margin-bottom: 80px;
}

.section-badge {
    display: inline-block;
    background: linear-gradient(135deg, #007bff, #0056b3);
    color: white;
    padding: 10px 25px;
    border-radius: 30px;
    font-size: 0.9rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    margin-bottom: 20px;
}

.section-header h2 {
    font-size: 2.8rem;
    color: #2c3e50;
    margin-bottom: 20px;
    font-weight: 700;
}

.section-header p {
    font-size: 1.2rem;
    color: #6c757d;
    max-width: 600px;
    margin: 0 auto;
    line-height: 1.6;
}

/* 产品网格 */
.products-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: 40px;
}

/* 产品卡片 */
.product-card {
    background: white;
    border-radius: 25px;
    box-shadow: 0 15px 35px rgba(0, 0, 0, 0.1);
    overflow: hidden;
    transition: all 0.4s ease;
    display: flex;
    flex-direction: column;
    height: 100%;
    position: relative;
}

.product-card:hover {
    transform: translateY(-15px);
    box-shadow: 0 25px 50px rgba(0, 0, 0, 0.15);
}

/* 产品图片 */
.product-image {
    height: 400px;
    position: relative;
    overflow: hidden;
}

.product-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.4s ease;
}

.product-card:hover .product-image img {
    transform: scale(1.1);
}

/* 图片覆盖层 */
.product-overlay {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(135deg, rgba(0, 123, 255, 0.9), rgba(0, 86, 179, 0.9));
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    transition: all 0.3s ease;
}

.product-card:hover .product-overlay {
    opacity: 1;
}

.product-btn {
    background: white;
    color: #007bff;
    padding: 12px 25px;
    border-radius: 25px;
    text-decoration: none;
    font-weight: 600;
    font-size: 0.95rem;
    transition: all 0.3s ease;
    transform: translateY(20px);
}

.product-card:hover .product-btn {
    transform: translateY(0);
}

.product-btn:hover {
    background: #f8f9fa;
    color: #0056b3;
    text-decoration: none;
}

/* 产品徽章 */
.product-badge {
    position: absolute;
    top: 15px;
    right: 15px;
    background: linear-gradient(135deg, #28a745, #20c997);
    color: white;
    padding: 6px 15px;
    border-radius: 20px;
    font-size: 0.8rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    z-index: 2;
}

/* 产品信息 */
.product-info {
    padding: 30px;
    flex: 1;
    display: flex;
    flex-direction: column;
}

.product-info h3 {
    font-size: 1.5rem;
    color: #2c3e50;
    margin-bottom: 15px;
    font-weight: 600;
}

.product-info p {
    font-size: 1rem;
    color: #6c757d;
    line-height: 1.6;
    margin-bottom: 20px;
    flex: 1;
}

/* 产品特性 */
.product-features {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
    margin-bottom: 25px;
}

.feature {
    background: #e3f2fd;
    color: #1976d2;
    padding: 8px 15px;
    border-radius: 20px;
    font-size: 0.85rem;
    font-weight: 500;
}

/* 产品底部 */
.product-footer {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-top: auto;
    padding-top: 20px;
    border-top: 1px solid #e9ecef;
}

.product-link {
    color: #007bff;
    text-decoration: none;
    font-weight: 600;
    font-size: 1rem;
    transition: color 0.3s ease;
}

.product-link:hover {
    color: #0056b3;
    text-decoration: none;
}

/* 产品评分 */
.product-rating {
    display: flex;
    align-items: center;
    gap: 8px;
    color: #ffc107;
}

.product-rating i {
    font-size: 1rem;
}

.product-rating span {
    color: #6c757d;
    font-weight: 600;
    font-size: 0.95rem;
}

/* 响应式设计 */
@media (max-width: 1200px) {
    .products-grid {
        grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
        gap: 30px;
    }
}

@media (max-width: 768px) {
    .products-section {
        padding: 80px 0;
    }
    
    .section-header h2 {
        font-size: 2.2rem;
    }
    
    .products-grid {
        grid-template-columns: 1fr;
        gap: 25px;
    }
    
    .product-info {
        padding: 25px;
    }
    
    .product-footer {
        flex-direction: column;
        gap: 15px;
        align-items: flex-start;
    }
}

@media (max-width: 480px) {
    .container {
        padding: 0 15px;
    }
    
    .section-header h2 {
        font-size: 1.8rem;
    }
    
    .product-image {
        height: 220px;
    }
    
    .product-info {
        padding: 20px;
    }
    
    .product-info h3 {
        font-size: 1.3rem;
    }
    
    .product-features {
        gap: 8px;
    }
    
    .feature {
        padding: 6px 12px;
        font-size: 0.8rem;
    }
}

/* 技术规格 */
.specifications-section {
    padding: 80px 20px;
    background: white;
}

.specs-container {
    max-width: 1000px;
    margin: 0 auto;
}

.specs-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 30px;
}

.spec-item {
    background: white;
    padding: 30px 25px;
    border-radius: 15px;
    text-align: center;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.1);
    transition: all 0.3s ease;
    border: 1px solid #f0f0f0;
}

.spec-item:hover {
    transform: translateY(-5px);
    box-shadow: 0 15px 35px rgba(0, 123, 255, 0.1);
}

.spec-icon {
    width: 60px;
    height: 60px;
    background: linear-gradient(135deg, #28a745, #20c997);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 20px;
    color: white;
    font-size: 1.5rem;
}

.spec-item h4 {
    font-size: 1.1rem;
    color: #2c3e50;
    margin-bottom: 10px;
    font-weight: 600;
}

.spec-item p {
    color: #666;
    font-size: 0.95rem;
    margin-bottom: 10px;
}

.spec-detail {
    background: #e3f2fd;
    color: #007bff;
    padding: 5px 12px;
    border-radius: 15px;
    font-size: 0.8rem;
    font-weight: 600;
    display: inline-block;
}

/* 认证 */
.certifications-section {
    padding: 80px 20px;
    background: #f8f9fa;
}

.certifications-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 30px;
    max-width: 800px;
    margin: 0 auto;
}

.cert-item {
    background: white;
    padding: 40px 30px;
    border-radius: 15px;
    text-align: center;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.1);
    transition: all 0.3s ease;
    position: relative;
}

.cert-item:hover {
    transform: translateY(-10px);
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.15);
}

.cert-image {
    margin-bottom: 20px;
}

.cert-image img {
    width: 80px;
    height: 80px;
    object-fit: contain;
}

.cert-item h4 {
    font-size: 1.2rem;
    color: #2c3e50;
    margin-bottom: 10px;
    font-weight: 600;
}

.cert-item p {
    color: #666;
    margin-bottom: 15px;
    font-size: 1rem;
}

.cert-year {
    display: inline-block;
    background: #007bff;
    color: white;
    padding: 5px 15px;
    border-radius: 20px;
    font-size: 0.85rem;
    font-weight: 600;
    margin-bottom: 10px;
}

.cert-status {
    background: #28a745;
    color: white;
    padding: 4px 12px;
    border-radius: 15px;
    font-size: 0.8rem;
    font-weight: 600;
    display: inline-block;
}

/* 行动号召 */
.cta-section {
    padding: 80px 20px;
    background: linear-gradient(135deg, #007bff, #0056b3);
    color: white;
    text-align: center;
    position: relative;
    overflow: hidden;
}

.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="grain" width="100" height="100" patternUnits="userSpaceOnUse"><circle cx="25" cy="25" r="1" fill="white" opacity="0.1"/><circle cx="75" cy="75" r="1" fill="white" opacity="0.1"/><circle cx="50" cy="10" r="1" fill="white" opacity="0.1"/><circle cx="10" cy="60" r="1" fill="white" opacity="0.1"/><circle cx="90" cy="40" r="1" fill="white" opacity="0.1"/></pattern></defs><rect width="100" height="100" fill="url(%23grain)"/></svg>');
    opacity: 0.3;
}

.cta-content {
    position: relative;
    z-index: 1;
}

.cta-badge {
    display: inline-block;
    background: rgba(255, 255, 255, 0.2);
    color: white;
    padding: 8px 20px;
    border-radius: 25px;
    font-size: 0.9rem;
    font-weight: 600;
    margin-bottom: 20px;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    border: 1px solid rgba(255, 255, 255, 0.3);
}

.cta-content h2 {
    font-size: 2.5rem;
    margin-bottom: 15px;
    font-weight: 700;
}

.cta-content p {
    font-size: 1.2rem;
    margin-bottom: 40px;
    opacity: 0.9;
}

.cta-buttons {
    display: flex;
    gap: 20px;
    justify-content: center;
    flex-wrap: wrap;
    margin-bottom: 40px;
}

.cta-buttons .btn-primary {
    background: white;
    color: #007bff;
    padding: 15px 30px;
    border-radius: 30px;
    text-decoration: none;
    font-weight: 600;
    font-size: 1.1rem;
    transition: all 0.3s ease;
    display: inline-flex;
    align-items: center;
    gap: 10px;
}

.cta-buttons .btn-primary:hover {
    background: #f8f9fa;
    transform: translateY(-3px);
    box-shadow: 0 10px 25px rgba(255, 255, 255, 0.3);
}

.cta-buttons .btn-secondary {
    background: transparent;
    color: white;
    border: 2px solid white;
    padding: 15px 30px;
    border-radius: 30px;
    text-decoration: none;
    font-weight: 600;
    font-size: 1.1rem;
    transition: all 0.3s ease;
    display: inline-flex;
    align-items: center;
    gap: 10px;
}

.cta-buttons .btn-secondary:hover {
    background: white;
    color: #007bff;
    transform: translateY(-3px);
}

.cta-features {
    display: flex;
    gap: 40px;
    justify-content: center;
    flex-wrap: wrap;
}

.cta-feature {
    display: flex;
    align-items: center;
    gap: 10px;
    color: white;
    font-weight: 500;
}

.cta-feature i {
    font-size: 1.2rem;
    opacity: 0.8;
}

/* 响应式设计 */
@media (max-width: 1200px) {
    .hero-section {
        gap: 40px;
        padding: 60px 20px;
    }
    
    .hero-content h1 {
        font-size: 3rem;
    }
    
    .benefits-grid, .applications-grid, .guides-grid, .products-grid {
        grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    }
}

@media (max-width: 768px) {
    .hub-container {
        padding: 0;
    }
    
    .hero-section {
        grid-template-columns: 1fr;
        gap: 40px;
        padding: 60px 20px;
        text-align: center;
    }
    
    .hero-content h1 {
        font-size: 2.5rem;
    }
    
    .hero-subtitle {
        font-size: 1.1rem;
    }
    
    .hero-features {
        justify-content: center;
        gap: 20px;
    }
    
    .hero-actions {
        justify-content: center;
    }
    
    .section-header {
        margin-bottom: 40px;
    }
    
    .section-header h2 {
        font-size: 2rem;
    }
    
    .section-header p {
        font-size: 1.1rem;
    }
    
    .benefits-grid, .applications-grid, .guides-grid, .products-grid {
        grid-template-columns: 1fr;
        gap: 20px;
    }
    
    .benefit-card, .guide-card, .product-card {
        padding: 30px 20px;
    }
    
    .application-content {
        padding: 25px;
    }
    
    .product-info {
        padding: 25px;
    }
    
    .specs-grid {
        grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
        gap: 20px;
    }
    
    .certifications-grid {
        grid-template-columns: 1fr;
        gap: 20px;
    }
    
    .cta-content h2 {
        font-size: 2rem;
    }
    
    .cta-buttons {
        flex-direction: column;
        align-items: center;
    }
    
    .cta-features {
        gap: 20px;
    }
}

@media (max-width: 480px) {
    .hero-content h1 {
        font-size: 2rem;
    }
    
    .hero-subtitle {
        font-size: 1rem;
    }
    
    .hero-features {
        flex-direction: column;
        gap: 15px;
    }
    
    .section-header h2 {
        font-size: 1.8rem;
    }
    
    .section-header p {
        font-size: 1rem;
    }
    
    .benefit-card, .guide-card, .product-card {
        padding: 25px 15px;
    }
    
    .application-content, .product-info {
        padding: 20px;
    }
    
    .specs-grid {
        grid-template-columns: 1fr;
    }
    
    .spec-item {
        padding: 25px 20px;
    }
    
    .cert-item {
        padding: 30px 20px;
    }
    
    .cta-content h2 {
        font-size: 1.8rem;
    }
    
    .cta-content p {
        font-size: 1rem;
    }
    
    .cta-buttons .btn-primary, .cta-buttons .btn-secondary {
        padding: 12px 25px;
        font-size: 1rem;
    }
    
    .cta-features {
        flex-direction: column;
        gap: 15px;
    }
}

/* 动画效果 */
@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes slideInLeft {
    from {
        opacity: 0;
        transform: translateX(-30px);
    }
    to {
        opacity: 1;
        transform: translateX(0);
    }
}

@keyframes slideInRight {
    from {
        opacity: 0;
        transform: translateX(30px);
    }
    to {
        opacity: 1;
        transform: translateX(0);
    }
}

.benefit-card, .application-card, .guide-card, .product-card {
    animation: fadeInUp 0.6s ease-out;
}

.benefit-card:nth-child(1) { animation-delay: 0.1s; }
.benefit-card:nth-child(2) { animation-delay: 0.2s; }
.benefit-card:nth-child(3) { animation-delay: 0.3s; }
.benefit-card:nth-child(4) { animation-delay: 0.4s; }
.benefit-card:nth-child(5) { animation-delay: 0.5s; }
.benefit-card:nth-child(6) { animation-delay: 0.6s; }

.application-card:nth-child(1) { animation-delay: 0.1s; }
.application-card:nth-child(2) { animation-delay: 0.2s; }
.application-card:nth-child(3) { animation-delay: 0.3s; }
.application-card:nth-child(4) { animation-delay: 0.4s; }

.guide-card:nth-child(1) { animation-delay: 0.1s; }
.guide-card:nth-child(2) { animation-delay: 0.2s; }
.guide-card:nth-child(3) { animation-delay: 0.3s; }
.guide-card:nth-child(4) { animation-delay: 0.4s; }
.guide-card:nth-child(5) { animation-delay: 0.5s; }

.product-card:nth-child(1) { animation-delay: 0.1s; }
.product-card:nth-child(2) { animation-delay: 0.2s; }
.product-card:nth-child(3) { animation-delay: 0.3s; }
.product-card:nth-child(4) { animation-delay: 0.4s; }
.product-card:nth-child(5) { animation-delay: 0.5s; }

/* 悬停效果增强 */
.benefit-card:hover .benefit-icon {
    transform: scale(1.1);
}

.guide-card:hover .guide-icon {
    transform: scale(1.1);
}

.product-card:hover .product-badge {
    transform: scale(1.1);
}

.spec-item:hover .spec-icon {
    transform: scale(1.1);
}

.cert-item:hover .cert-image img {
    transform: scale(1.1);
}

/* 焦点状态 */
.btn-primary:focus, .btn-secondary:focus, .guide-link:focus, .product-link:focus, .application-link:focus {
    outline: 2px solid #007bff;
    outline-offset: 2px;
}

/* 打印样式 */
@media print {
    .hero-section, .cta-section {
        background: white !important;
        color: black !important;
    }
    
    .benefit-card, .application-card, .guide-card, .product-card {
        box-shadow: none !important;
        border: 1px solid #ddd !important;
    }
    
    .btn-primary, .btn-secondary {
        border: 1px solid #333 !important;
        background: white !important;
        color: black !important;
    }
}