/* 全局样式 */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    line-height: 1.6;
    color: #333;
    overflow-x: hidden;
}

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

/* 导航栏样式 */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    box-shadow: 0 2px 20px rgba(0, 0, 0, 0.1);
    z-index: 1000;
    transition: all 0.3s ease;
}

.navbar.scrolled {
    background: rgba(255, 255, 255, 0.98);
    box-shadow: 0 2px 25px rgba(0, 0, 0, 0.15);
}

.nav-container {
    max-width: 1400px;
    margin: 0 auto;
    padding: 0 15px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    height: 80px;
}

.nav-logo {
    display: flex;
    align-items: center;
    gap: 15px;
    flex-shrink: 0;
}

.logo-img {
    width: 50px;
    height: 50px;
    border-radius: 8px;
    object-fit: cover;
}

.nav-logo h2 {
    font-size: 1.2rem;
    font-weight: 600;
    color: #2c3e50;
    line-height: 1.2;
    margin: 0;
    white-space: nowrap;
}

.nav-menu {
    display: flex;
    list-style: none;
    gap: 8px;
    align-items: center;
    height: 100%;
    margin: 0;
    padding: 0;
    flex-wrap: nowrap;
}

.nav-item {
    display: flex;
    align-items: center;
    height: 60px;
    justify-content: center;
}

.nav-link {
    text-decoration: none;
    color: #333;
    font-weight: 500;
    padding: 10px 8px;
    border-radius: 6px;
    transition: all 0.3s ease;
    position: relative;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 0.8rem;
    letter-spacing: 0px;
    line-height: 1.2;
    height: 40px;
    text-align: center;
    white-space: nowrap;
    box-sizing: border-box;
    vertical-align: middle;
    font-family: inherit;
}

.nav-link:hover,
.nav-link.active {
    color: #4A90E2;
    background: rgba(74, 144, 226, 0.1);
    transform: translateY(-1px);
}

.language-switch {
    margin-left: 15px;
    display: flex;
    align-items: center;
    height: 60px;
    justify-content: center;
}

.lang-btn {
    background: linear-gradient(135deg, #4A90E2, #357ABD);
    border: none;
    color: white;
    padding: 10px 18px;
    border-radius: 25px;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    font-size: 0.9rem;
    font-weight: 500;
    transition: all 0.3s ease;
    line-height: 1.2;
    white-space: nowrap;
    height: 40px;
    box-sizing: border-box;
}

.lang-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 5px 15px rgba(74, 144, 226, 0.3);
}

/* 汉堡菜单 */
.hamburger {
    display: none;
    flex-direction: column;
    cursor: pointer;
    gap: 4px;
    padding: 5px;
    align-items: center;
    justify-content: center;
}

.hamburger .bar {
    width: 25px;
    height: 3px;
    background: #333;
    transition: 0.3s;
    border-radius: 3px;
}

.hamburger.active .bar:nth-child(1) {
    transform: rotate(45deg) translate(5px, 5px);
}

.hamburger.active .bar:nth-child(2) {
    opacity: 0;
}

.hamburger.active .bar:nth-child(3) {
    transform: rotate(-45deg) translate(7px, -6px);
}

/* Hero Banner样式 */
.hero {
    position: relative;
    height: 90vh;
    min-height: 600px;
    max-height: 800px;
    overflow: hidden;
}

.hero-banner {
    position: relative;
    width: 100%;
    height: 100%;
}

.hero-image {
    position: relative;
    width: 100%;
    height: 100%;
    display: flex;
    align-items: center;
    justify-content: center;
}

.banner-image {
    width: 100%;
    height: 100%;
    object-fit: cover;
    object-position: center;
}

.hero-overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.4);
    display: flex;
    align-items: center;
    justify-content: center;
}

.hero-content {
    text-align: center;
    color: white;
    z-index: 2;
    max-width: 800px;
    padding: 0 20px;
}

.hero-title {
    font-size: 3.5rem;
    font-weight: 700;
    margin-bottom: 1rem;
    text-shadow: 2px 2px 4px rgba(0, 0, 0, 0.7);
    line-height: 1.2;
}

.hero-subtitle {
    font-size: 1.5rem;
    font-weight: 400;
    margin-bottom: 0;
    text-shadow: 1px 1px 2px rgba(0, 0, 0, 0.7);
    opacity: 0.9;
}

.carousel-slide.active {
    opacity: 1;
    transform: translateX(0);
}

.carousel-slide.prev {
    transform: translateX(-100%);
}

.slide-image {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: 1;
    overflow: hidden;
}

.slide-image::after {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(
        45deg,
        rgba(0, 0, 0, 0.3) 0%,
        rgba(0, 0, 0, 0.1) 50%,
        rgba(0, 0, 0, 0.3) 100%
    );
    z-index: 2;
}

.slide-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    filter: brightness(0.85) contrast(1.1) saturate(1.1);
    image-rendering: -webkit-optimize-contrast;
    image-rendering: crisp-edges;
    image-rendering: pixelated;
    image-rendering: auto;
}

.slide-content {
    position: relative;
    z-index: 3;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
    color: white;
    text-align: center;
    animation: slideInUp 0.8s ease-out 0.3s both;
}

.slide-title {
    font-size: 3.5rem;
    font-weight: 700;
    margin-bottom: 20px;
    line-height: 1.2;
    text-shadow: 2px 2px 8px rgba(0, 0, 0, 0.6);
    letter-spacing: 0.5px;
}

.slide-subtitle {
    font-size: 1.3rem;
    margin-bottom: 30px;
    opacity: 0.95;
    max-width: 600px;
    margin-left: auto;
    margin-right: auto;
    text-shadow: 1px 1px 4px rgba(0, 0, 0, 0.5);
    line-height: 1.4;
}

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

/* 按钮样式 */
.btn {
    display: inline-flex;
    align-items: center;
    padding: 15px 30px;
    text-decoration: none;
    border-radius: 50px;
    font-weight: 600;
    font-size: 1rem;
    transition: all 0.3s ease;
    border: 2px solid transparent;
    cursor: pointer;
}

.btn-primary {
    background: linear-gradient(135deg, #4A90E2, #357ABD);
    color: white;
    border-color: #4A90E2;
}

.btn-primary:hover {
    transform: translateY(-3px);
    box-shadow: 0 10px 25px rgba(74, 144, 226, 0.4);
}

.btn-secondary {
    background: transparent;
    color: white;
    border-color: white;
}

.btn-secondary:hover {
    background: white;
    color: #4A90E2;
    transform: translateY(-3px);
    box-shadow: 0 10px 25px rgba(255, 255, 255, 0.3);
}

/* 轮播图控制按钮 */
.carousel-controls {
    position: absolute;
    top: 50%;
    width: 100%;
    display: flex;
    justify-content: space-between;
    padding: 0 30px;
    z-index: 3;
    pointer-events: none;
}

.carousel-btn {
    width: 50px;
    height: 50px;
    background: rgba(255, 255, 255, 0.2);
    border: 2px solid rgba(255, 255, 255, 0.3);
    border-radius: 50%;
    color: white;
    font-size: 1.2rem;
    cursor: pointer;
    transition: all 0.3s ease;
    display: flex;
    align-items: center;
    justify-content: center;
    backdrop-filter: blur(10px);
    pointer-events: auto;
}

.carousel-btn:hover {
    background: rgba(255, 255, 255, 0.3);
    border-color: rgba(255, 255, 255, 0.5);
    transform: scale(1.1);
}

.carousel-btn:active {
    transform: scale(0.95);
}

/* 轮播图指示器 */
.carousel-indicators {
    position: absolute;
    bottom: 30px;
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    gap: 15px;
    z-index: 3;
}

.indicator {
    width: 12px;
    height: 12px;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.4);
    cursor: pointer;
    transition: all 0.3s ease;
    border: 2px solid transparent;
}

.indicator.active {
    background: white;
    transform: scale(1.2);
    border-color: rgba(255, 255, 255, 0.5);
}

.indicator:hover {
    background: rgba(255, 255, 255, 0.7);
    transform: scale(1.1);
}



/* 关于我们区域 */
.about {
    padding: 100px 0;
    background: white;
}

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

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

.section-title::after {
    content: '';
    position: absolute;
    bottom: -10px;
    left: 50%;
    transform: translateX(-50%);
    width: 60px;
    height: 3px;
    background: linear-gradient(135deg, #4A90E2, #357ABD);
    border-radius: 2px;
}

.section-subtitle {
    font-size: 1.1rem;
    color: #666;
    max-width: 600px;
    margin: 0 auto;
}

.about-content {
    display: grid;
    grid-template-columns: 2fr 1fr;
    gap: 60px;
    align-items: center;
}

.about-item {
    display: flex;
    gap: 20px;
    margin-bottom: 40px;
}

.about-icon {
    width: 60px;
    height: 60px;
    background: linear-gradient(135deg, #4A90E2, #357ABD);
    border-radius: 15px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-size: 1.5rem;
    flex-shrink: 0;
}

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

.about-info p {
    color: #666;
    line-height: 1.7;
}

.about-image {
    position: relative;
    border-radius: 20px;
    overflow: hidden;
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.1);
}

.about-image img {
    width: 100%;
    height: 400px;
    object-fit: cover;
    transition: transform 0.3s ease;
}

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

/* 产品展示区域 */
.products {
    padding: 100px 0;
    background: #f8f9fa;
}

.products-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: 40px;
    margin-bottom: 50px;
}

.product-card {
    background: white;
    border-radius: 20px;
    overflow: hidden;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.1);
    transition: all 0.3s ease;
    cursor: pointer;
    position: relative;
}

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

.product-image {
    position: relative;
    height: 250px;
    overflow: hidden;
}

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

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

.product-overlay {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(74, 144, 226, 0.9);
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    transition: all 0.3s ease;
}

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

.overlay-content {
    text-align: center;
    color: white;
}

.overlay-content i {
    font-size: 2rem;
    margin-bottom: 10px;
    display: block;
}

.overlay-content span {
    font-size: 1rem;
    font-weight: 500;
}

.product-content {
    padding: 30px;
}

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

.product-description {
    color: #666;
    line-height: 1.6;
}

.view-all-products {
    text-align: center;
    margin-top: 40px;
}

/* ===============================
   页面横幅样式
   =============================== */

/* 页面标题横幅 */
.page-banner {
    position: relative;
    height: 300px;
    background: linear-gradient(135deg, #4A90E2 0%, #357ABD 100%);
    display: flex;
    align-items: center;
    justify-content: center;
    overflow: hidden;
}

.page-banner::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: url('images/case1.jpg') center/cover;
    opacity: 0.3;
    z-index: 1;
}

.banner-overlay {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(135deg, rgba(74, 144, 226, 0.8) 0%, rgba(53, 122, 189, 0.9) 100%);
    z-index: 2;
}

.banner-content {
    position: relative;
    z-index: 3;
    text-align: center;
    color: white;
    max-width: 800px;
    padding: 0 20px;
}

.banner-title {
    font-size: 3rem;
    font-weight: 700;
    margin-bottom: 15px;
    text-shadow: 0 2px 10px rgba(0, 0, 0, 0.3);
}

.banner-subtitle {
    font-size: 1.2rem;
    opacity: 0.9;
    line-height: 1.6;
    font-weight: 400;
}

/* 案例展示区域 */
.cases-showcase {
    padding: 100px 0;
    background: #f8f9fa;
}

/* 成功案例展示 */
.success-cases {
    padding: 100px 0;
    background: white;
}

/* index.html中的成功案例特殊样式 */
.success-cases .case-item {
    transition: all 0.3s ease;
    border: 1px solid rgba(0, 0, 0, 0.05);
    cursor: pointer;
    position: relative;
}

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

.success-cases .case-item:active {
    transform: translateY(-8px) scale(0.98);
    transition: all 0.1s ease;
}

.success-cases .case-description {
    display: -webkit-box;
    -webkit-line-clamp: 3;
    -webkit-box-orient: vertical;
    overflow: hidden;
    text-overflow: ellipsis;
    line-height: 1.6;
    margin-bottom: 15px;
}

.success-cases .case-image {
    height: 220px;
    cursor: pointer;
    position: relative;
    overflow: hidden;
}

.success-cases .case-image:active {
    transform: scale(0.98);
    transition: transform 0.1s ease;
}

.success-cases .view-all-cases {
    margin-top: 50px;
}

.cases-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: 40px;
    margin-bottom: 50px;
}

.case-item {
    background: white;
    border-radius: 15px;
    overflow: hidden;
    box-shadow: 0 8px 25px rgba(0, 0, 0, 0.1);
    transition: all 0.3s ease;
    cursor: pointer;
    position: relative;
}

.case-item:hover {
    transform: translateY(-8px);
    box-shadow: 0 15px 35px rgba(0, 0, 0, 0.15);
}

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

/* index.html中的成功案例显示高度调整 */
.success-cases .case-image {
    height: 220px;
}

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

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

.case-overlay {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.7);
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    transition: all 0.3s ease;
}

.case-item:hover .case-overlay {
    opacity: 1;
}

.case-content {
    padding: 25px;
}

.case-title {
    font-size: 1.2rem;
    color: #2c3e50;
    margin-bottom: 12px;
    font-weight: 600;
}

.case-description {
    color: #666;
    line-height: 1.6;
    font-size: 0.95rem;
    margin-bottom: 15px;
}

/* 案例标签样式 */
.case-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    margin-top: 15px;
}

.case-tags .tag {
    display: inline-block;
    background: linear-gradient(135deg, #4A90E2, #357ABD);
    color: white;
    padding: 4px 12px;
    border-radius: 15px;
    font-size: 0.8rem;
    font-weight: 500;
    white-space: nowrap;
}

/* 案例图片点击效果 */
.case-image {
    position: relative;
    height: 250px;
    overflow: hidden;
    cursor: pointer;
    user-select: none; /* 防止文本选中 */
    -webkit-tap-highlight-color: transparent; /* 移除移动端点击高亮 */
}

.case-image:active {
    transform: scale(0.98); /* 点击时轻微缩放 */
    transition: transform 0.1s ease;
}

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

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

.case-overlay {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.7);
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    transition: all 0.3s ease;
}

.case-item:hover .case-overlay {
    opacity: 1;
}

.case-overlay .overlay-content {
    text-align: center;
    color: white;
}

.case-overlay .overlay-content i {
    font-size: 2.5rem;
    margin-bottom: 10px;
    display: block;
}

.case-overlay .overlay-content span {
    font-size: 1rem;
    font-weight: 500;
}

.view-all-cases {
    text-align: center;
    margin-top: 40px;
}

/* 合作品牌展示 */
.partner-brands {
    padding: 80px 0;
    background: #f8f9fa;
    overflow: hidden;
}

.brands-carousel {
    margin-top: 50px;
    position: relative;
    overflow: hidden;
}

.brands-track {
    display: flex;
    gap: 60px;
    justify-content: center;
    align-items: center;
    width: 100%;
}

.brand-item {
    flex-shrink: 0;
    width: 150px;
    height: 80px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: white;
    border-radius: 10px;
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.05);
    transition: all 0.3s ease;
}

.brand-item:hover {
    transform: translateY(-5px);
    box-shadow: 0 8px 25px rgba(0, 0, 0, 0.1);
}

.brand-item img {
    max-width: 120px;
    max-height: 60px;
    object-fit: contain;
    transition: all 0.3s ease;
}

.brand-item:hover img {
    transform: scale(1.05);
}

/* ===============================
   客户评价区域样式
   =============================== */

.customer-testimonials {
    padding: 100px 0;
    background: linear-gradient(135deg, #f8f9fa 0%, #e9ecef 100%);
}

.testimonials-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: 40px;
    margin-top: 60px;
}

.testimonial-item {
    background: white;
    border-radius: 20px;
    padding: 40px;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.1);
    transition: all 0.3s ease;
    position: relative;
}

.testimonial-item:hover {
    transform: translateY(-8px);
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.15);
}

.testimonial-content {
    margin-bottom: 30px;
}

.quote-icon {
    color: #4A90E2;
    font-size: 2rem;
    margin-bottom: 20px;
}

.testimonial-text {
    font-size: 1.1rem;
    line-height: 1.8;
    color: #555;
    font-style: italic;
    margin-bottom: 20px;
}

.testimonial-rating {
    margin-bottom: 20px;
}

.stars {
    display: flex;
    gap: 5px;
}

.stars i {
    color: #ffc107;
    font-size: 1.2rem;
}

.testimonial-author {
    display: flex;
    align-items: center;
    gap: 15px;
    padding-top: 20px;
    border-top: 2px solid #f1f3f4;
}

.author-avatar {
    width: 60px;
    height: 60px;
    background: linear-gradient(135deg, #4A90E2, #357ABD);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-size: 1.5rem;
    flex-shrink: 0;
}

.author-info h4 {
    color: #2c3e50;
    font-size: 1.1rem;
    margin-bottom: 5px;
    font-weight: 600;
}

.author-info p {
    color: #666;
    font-size: 0.9rem;
    margin: 0;
}

/* 合作品牌居中显示，不再需要滚动动画 */

/* ===============================
   案例页面响应式设计
   =============================== */

@media (max-width: 768px) {
    .banner-title {
        font-size: 2.2rem;
    }
    
    .banner-subtitle {
        font-size: 1rem;
    }
    
    .cases-grid {
        grid-template-columns: 1fr;
        gap: 30px;
    }
    
    .case-image {
        height: 200px;
    }
    
    .case-overlay .overlay-content i {
        font-size: 2rem;
    }
    
    .case-tags {
        gap: 6px;
    }
    
    .case-tags .tag {
        font-size: 0.75rem;
        padding: 3px 10px;
    }
    
    .testimonials-grid {
        grid-template-columns: 1fr;
        gap: 30px;
    }
    
    .testimonial-item {
        padding: 30px 20px;
    }
    
    .modal-close {
        top: -40px;
        width: 35px;
        height: 35px;
    }
    
    #previewImage {
        max-height: 60vh;
    }
}

@media (max-width: 480px) {
    .page-banner {
        height: 250px;
    }
    
    .banner-title {
        font-size: 1.8rem;
    }
    
    .banner-subtitle {
        font-size: 0.9rem;
    }
    
    .cases-showcase {
        padding: 60px 0;
    }
    
    .customer-testimonials {
        padding: 60px 0;
    }
    
    .section-title {
        font-size: 2rem;
    }
    
    .testimonial-item {
        padding: 25px 15px;
    }
    
    .quote-icon {
        font-size: 1.5rem;
    }
    
    .testimonial-text {
        font-size: 1rem;
    }
    
    .author-avatar {
        width: 50px;
        height: 50px;
        font-size: 1.2rem;
    }
}

/* 按钮样式增强 */
.btn {
    display: inline-flex;
    align-items: center;
    padding: 15px 30px;
    text-decoration: none;
    border-radius: 50px;
    font-weight: 600;
    font-size: 1rem;
    transition: all 0.3s ease;
    border: 2px solid transparent;
    cursor: pointer;
    white-space: nowrap;
}

.btn-primary {
    background: linear-gradient(135deg, #4A90E2, #357ABD);
    color: white;
    border-color: transparent;
}

.btn-primary:hover {
    background: linear-gradient(135deg, #357ABD, #2E6A9F);
    transform: translateY(-2px);
    box-shadow: 0 8px 20px rgba(74, 144, 226, 0.3);
}

.btn-secondary {
    background: transparent;
    color: #4A90E2;
    border-color: #4A90E2;
}

.btn-secondary:hover {
    background: #4A90E2;
    color: white;
    transform: translateY(-2px);
    box-shadow: 0 8px 20px rgba(74, 144, 226, 0.3);
}

/* 页脚样式 */
.footer {
    background: #2c3e50;
    color: white;
    padding: 60px 0 30px;
}

.footer-content {
    display: grid;
    grid-template-columns: 2fr 1.5fr 2fr 1.5fr;
    gap: 40px;
    margin-bottom: 40px;
}

@media (max-width: 1024px) {
    .footer-content {
        grid-template-columns: repeat(2, 1fr);
        gap: 30px;
    }
}

@media (max-width: 768px) {
    .footer-content {
        grid-template-columns: 1fr;
        gap: 30px;
        text-align: center;
    }
}

.footer-section h3,
.footer-section h4 {
    margin-bottom: 20px;
    color: #4A90E2;
}

.footer-section ul {
    list-style: none;
}

.footer-section ul li {
    margin-bottom: 10px;
}

.footer-section ul li a {
    color: #bbb;
    text-decoration: none;
    transition: color 0.3s ease;
}

.footer-section ul li a:hover {
    color: #4A90E2;
}

.contact-links p {
    color: #bbb;
    margin-bottom: 10px;
    display: flex;
    align-items: center;
    gap: 10px;
}

.contact-links p i {
    width: 18px;
    color: #4A90E2;
}

.contact-links .fa-weixin {
    color: #1aad19;
}

.social-links {
    display: flex;
    gap: 15px;
    margin-top: 20px;
}

.social-links a {
    width: 40px;
    height: 40px;
    background: #4A90E2;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    text-decoration: none;
    transition: all 0.3s ease;
}

.social-links a:hover {
    transform: translateY(-3px);
    box-shadow: 0 5px 15px rgba(74, 144, 226, 0.4);
}

.social-links a[title*="微信"] {
    background: #1aad19;
}

.social-links a[title*="微信"]:hover {
    box-shadow: 0 5px 15px rgba(26, 173, 25, 0.4);
}

.social-links a .fa-instagram {
    color: white;
}

.social-links a:has(.fa-instagram) {
    background: linear-gradient(45deg, #f09433 0%, #e6683c 25%, #dc2743 50%, #cc2366 75%, #bc1888 100%);
}

.social-links a:has(.fa-instagram):hover {
    box-shadow: 0 5px 15px rgba(225, 48, 108, 0.4);
}

.social-links a .fa-facebook {
    color: white;
}

.social-links a:has(.fa-facebook) {
    background: #1877f2;
}

.social-links a:has(.fa-facebook):hover {
    box-shadow: 0 5px 15px rgba(24, 119, 242, 0.4);
}

/* 底部栏各部分特定样式 */
.footer-section.company-info p {
    line-height: 1.6;
    color: #bbb;
}

.footer-section.quick-links ul {
    columns: 1;
}

.footer-section.contact-info .contact-links p {
    margin-bottom: 12px;
}

.footer-section.contact-info .address {
    margin-top: 15px;
    padding-top: 15px;
    border-top: 1px solid #444;
}

.footer-section.social-media {
    text-align: center;
}

.footer-section.social-media .social-links {
    justify-content: center;
    margin: 20px 0;
}

.footer-section.social-media .social-description {
    font-size: 0.9rem;
    color: #95a5a6;
    margin-top: 15px;
    line-height: 1.4;
}

@media (max-width: 768px) {
    .footer-section.social-media {
        text-align: center;
    }
    
    .footer-section.quick-links,
    .footer-section.contact-info {
        text-align: center;
    }
    
    .footer-section.contact-info .contact-links {
        display: inline-block;
        text-align: left;
    }
}

.footer-section ul li a {
    color: #bbb;
    text-decoration: none;
    transition: color 0.3s ease;
    cursor: pointer;
}

.footer-section ul li a:hover {
    color: #4A90E2;
}

.footer-bottom {
    text-align: center;
    padding-top: 30px;
    border-top: 1px solid #444;
    color: #bbb;
}

.footer-bottom p {
    margin: 5px 0;
}

.footer-address {
    font-size: 0.9rem;
    color: #95a5a6;
    margin-top: 8px;
}

/* 返回顶部按钮 */
.back-to-top {
    position: fixed;
    bottom: 30px;
    right: 30px;
    width: 50px;
    height: 50px;
    background: linear-gradient(135deg, #4A90E2, #357ABD);
    color: white;
    border: none;
    border-radius: 50%;
    cursor: pointer;
    display: none;
    align-items: center;
    justify-content: center;
    font-size: 1.2rem;
    transition: all 0.3s ease;
    z-index: 1000;
}

.back-to-top:hover {
    transform: translateY(-3px);
    box-shadow: 0 10px 25px rgba(74, 144, 226, 0.4);
}

.back-to-top.show {
    display: flex;
}

/* 动画效果 */
@keyframes slideInUp {
    from {
        opacity: 0;
        transform: translateY(50px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes fadeInLeft {
    from {
        opacity: 0;
        transform: translateX(-50px);
    }
    to {
        opacity: 1;
        transform: translateX(0);
    }
}

@keyframes fadeInRight {
    from {
        opacity: 0;
        transform: translateX(50px);
    }
    to {
        opacity: 1;
        transform: translateX(0);
    }
}

/* 懒加载样式 */
img.lazy {
    opacity: 0;
    transition: opacity 0.3s ease;
    background: linear-gradient(90deg, #f0f0f0 25%, #e0e0e0 50%, #f0f0f0 75%);
    background-size: 200% 100%;
    animation: loading 1.5s infinite;
}

img.lazy-loading {
    opacity: 0.5;
}

img.lazy-loaded {
    opacity: 1;
}

img.lazy-error {
    opacity: 1;
    background: #f8f8f8 !important;
    position: relative;
}

img.lazy-error::after {
    content: '图片加载失败';
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    color: #999;
    font-size: 0.9rem;
    background: rgba(255, 255, 255, 0.9);
    padding: 10px;
    border-radius: 4px;
}

@keyframes loading {
    0% {
        background-position: -200% 0;
    }
    100% {
        background-position: 200% 0;
    }
}

/* 响应式设计 */
@media (max-width: 1024px) {
    .about-content {
        grid-template-columns: 1fr;
        gap: 40px;
    }
    
    .about-image {
        order: -1;
    }
}

@media (max-width: 768px) {
    .hamburger {
        display: flex;
    }
    
    .nav-menu {
        position: fixed;
        top: 80px;
        left: 0;
        right: 0;
        background: white;
        flex-direction: column;
        padding: 25px 20px;
        gap: 8px;
        height: auto;
        transform: translateY(-100%);
        opacity: 0;
        visibility: hidden;
        transition: all 0.3s ease;
        box-shadow: 0 5px 20px rgba(0, 0, 0, 0.1);
        align-items: stretch;
    }
    
    .nav-menu.active {
        transform: translateY(0);
        opacity: 1;
        visibility: visible;
    }
    
    .nav-item {
        height: 50px;
        justify-content: center;
        align-items: center;
    }
    
    .nav-link {
        text-align: center;
        justify-content: center;
        align-items: center;
        padding: 12px 20px;
        font-size: 1rem;
        font-weight: 500;
        height: 44px;
        width: 100%;
        border-radius: 8px;
        display: flex;
        line-height: 1.2;
        letter-spacing: 0.2px;
        box-sizing: border-box;
    }
    
    .language-switch {
        margin-left: 0;
        margin-top: 15px;
        justify-content: center;
        height: 50px;
        align-items: center;
    }
    
    .lang-btn {
        height: 44px;
        padding: 12px 20px;
        font-size: 1rem;
    }
    
    .slide-title {
        font-size: 2.5rem;
    }
    
    .slide-subtitle {
        font-size: 1.1rem;
    }
    
    .slide-buttons {
        flex-direction: column;
        align-items: center;
    }
    

    
    .products-grid {
        grid-template-columns: 1fr;
        gap: 30px;
    }
    
    .cases-grid {
        grid-template-columns: 1fr;
        gap: 30px;
    }
    
    .brands-track {
        gap: 40px;
    }
    
    .brand-item {
        width: 120px;
        height: 70px;
    }
    
    .about-item {
        flex-direction: column;
        text-align: center;
    }
    
    .carousel-controls {
        padding: 0 20px;
    }
    
    .carousel-btn {
        width: 40px;
        height: 40px;
        font-size: 1rem;
    }
}

@media (max-width: 480px) {
    .container {
        padding: 0 15px;
    }
    
    .nav-container {
        padding: 0 15px;
    }
    
    .nav-logo h2 {
        font-size: 1rem;
        line-height: 1.2;
    }
    
    .nav-logo {
        gap: 10px;
    }
    
    .logo-img {
        width: 40px;
        height: 40px;
    }
    
    .hero {
        height: 70vh;
        min-height: 500px;
    }
    
    .slide-title {
        font-size: 2rem;
    }
    
    .slide-subtitle {
        font-size: 1rem;
    }
    
    .section-title {
        font-size: 2rem;
    }
    
    .about,
    .products {
        padding: 60px 0;
    }
}

/* ===============================
   视频展示区域样式
   =============================== */

/* 视频展示区域样式 */
.video-showcase {
    padding: 80px 0;
    background: #fff;
}

.video-container {
    margin-top: 50px;
}

.video-wrapper {
    display: grid;
    grid-template-columns: 2fr 1fr;
    gap: 40px;
    margin-bottom: 50px;
    align-items: center;
}

.video-placeholder {
    position: relative;
    border-radius: 15px;
    overflow: hidden;
    box-shadow: 0 15px 30px rgba(0, 0, 0, 0.1);
    background: #000;
}

.video-preview {
    position: relative;
    cursor: pointer;
}

.video-poster {
    width: 100%;
    height: 350px;
    object-fit: cover;
    transition: transform 0.3s ease;
}

.video-preview:hover .video-poster {
    transform: scale(1.05);
}

.play-button {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 80px;
    height: 80px;
    background: rgba(255, 255, 255, 0.9);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    transition: all 0.3s ease;
    backdrop-filter: blur(10px);
}

.play-button:hover {
    background: rgba(255, 255, 255, 1);
    transform: translate(-50%, -50%) scale(1.1);
}

.play-button i {
    font-size: 1.8rem;
    color: #007bff;
    margin-left: 3px;
}

#company-video {
    width: 100%;
    height: 350px;
    border-radius: 15px;
}

.video-info h3 {
    color: #2c3e50;
    font-size: 1.8rem;
    margin-bottom: 20px;
}

.video-info p {
    color: #666;
    line-height: 1.6;
    font-size: 1.1rem;
}

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

.video-item {
    border-radius: 15px;
    overflow: hidden;
    box-shadow: 0 10px 20px rgba(0, 0, 0, 0.1);
    transition: transform 0.3s ease;
}

.video-item:hover {
    transform: translateY(-5px);
}

.video-thumb {
    position: relative;
    overflow: hidden;
}

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

.video-overlay {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 123, 255, 0.8);
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    opacity: 0;
    transition: all 0.3s ease;
    cursor: pointer;
}

.video-item:hover .video-overlay {
    opacity: 1;
}

.video-item:hover .video-thumb img {
    transform: scale(1.1);
}

.video-overlay i {
    font-size: 3rem;
    color: white;
    margin-bottom: 10px;
}

.video-overlay span {
    color: white;
    font-weight: 600;
    font-size: 1.1rem;
}

/* 企业优势样式 */
.company-advantages {
    padding: 80px 0;
    background: white;
    color: #333;
}

.company-advantages .section-title {
    color: #2c3e50;
}

.advantages-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 40px;
    margin-top: 50px;
}

.advantage-item {
    text-align: center;
    padding: 40px 30px;
    background: #f8f9fa;
    border-radius: 15px;
    border: 1px solid #e9ecef;
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.08);
    transition: transform 0.3s ease;
}

.advantage-item:hover {
    transform: translateY(-10px);
}

.advantage-icon {
    width: 80px;
    height: 80px;
    background: linear-gradient(135deg, #4A90E2, #357ABD);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 20px;
}

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

.advantage-item h3 {
    font-size: 1.3rem;
    margin-bottom: 15px;
    color: #2c3e50;
}

.advantage-item p {
    line-height: 1.6;
    color: #666;
}

/* 视频展示响应式设计 */
@media (max-width: 768px) {
    .video-wrapper {
        grid-template-columns: 1fr;
        text-align: center;
    }
    
    .video-poster,
    #company-video {
        height: 250px;
    }
    
    .video-grid {
        grid-template-columns: 1fr;
    }
    
    .advantages-grid {
        grid-template-columns: 1fr;
        gap: 30px;
    }
    
    .play-button {
        width: 60px;
        height: 60px;
    }
    
    .play-button i {
        font-size: 1.4rem;
    }
}

/* 视频模态框样式 */
.video-modal {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    z-index: 9999;
    opacity: 0;
    visibility: hidden;
    transition: all 0.3s ease;
}

.video-modal.show {
    opacity: 1;
    visibility: visible;
}

.modal-overlay {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.8);
    cursor: pointer;
}

.modal-content {
    position: relative;
    width: 90%;
    max-width: 800px;
    max-height: 90vh;
    margin: 5vh auto;
    background: white;
    border-radius: 15px;
    overflow: hidden;
    transform: translateY(-50px);
    transition: transform 0.3s ease;
}

.video-modal.show .modal-content {
    transform: translateY(0);
}

.modal-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 20px 30px;
    background: #f8f9fa;
    border-bottom: 1px solid #e9ecef;
}

.modal-header h3 {
    margin: 0;
    color: #2c3e50;
    font-size: 1.5rem;
}

.close-modal {
    background: none;
    border: none;
    font-size: 1.5rem;
    color: #666;
    cursor: pointer;
    padding: 5px;
    border-radius: 50%;
    transition: all 0.3s ease;
}

.close-modal:hover {
    background: #e9ecef;
    color: #333;
}

.modal-body {
    padding: 40px 30px;
}

.video-placeholder-modal {
    text-align: center;
    padding: 60px 20px;
    background: #f8f9fa;
    border-radius: 10px;
    color: #666;
    line-height: 1.6;
}

.video-placeholder-modal p {
    margin-bottom: 10px;
    font-size: 1.1rem;
}

/* ===============================
   公司简介与视频整合区域样式
   =============================== */

.company-intro-video {
    padding: 80px 0;
    background: linear-gradient(135deg, #f8f9fa 0%, #e9ecef 100%);
}

.intro-video-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 60px;
    align-items: start;
    margin-top: 50px;
}

/* 左侧文字区域 */
.intro-text-section {
    padding-right: 20px;
}

.intro-text h3 {
    color: #2c3e50;
    font-size: 2rem;
    margin-bottom: 25px;
    font-weight: 600;
}

.intro-text p {
    font-size: 1.1rem;
    line-height: 1.8;
    color: #666;
    text-align: justify;
    margin-bottom: 40px;
}





/* 右侧视频区域 */
.video-section {
    padding-left: 20px;
}

.main-video {
    margin-bottom: 30px;
}

.main-video .video-placeholder {
    position: relative;
    border-radius: 15px;
    overflow: hidden;
    box-shadow: 0 15px 30px rgba(0, 0, 0, 0.1);
    background: #000;
    margin-bottom: 15px;
}

.main-video .video-poster {
    width: 100%;
    height: 280px;
    object-fit: cover;
    transition: transform 0.3s ease;
}

.main-video .play-button {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 70px;
    height: 70px;
    background: rgba(255, 255, 255, 0.9);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    transition: all 0.3s ease;
    backdrop-filter: blur(10px);
}

.main-video .play-button:hover {
    background: rgba(255, 255, 255, 1);
    transform: translate(-50%, -50%) scale(1.1);
}

.main-video .play-button i {
    font-size: 1.5rem;
    color: #007bff;
    margin-left: 2px;
}

.main-video #company-video {
    width: 100%;
    height: 280px;
    border-radius: 15px;
}

.video-info {
    text-align: center;
}

.video-info h4 {
    color: #2c3e50;
    font-size: 1.3rem;
    margin-bottom: 8px;
    font-weight: 600;
}

.video-info p {
    color: #666;
    font-size: 0.95rem;
    line-height: 1.5;
    margin: 0;
}

/* 视频缩略图网格 */
.video-thumbnails {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 15px;
}

.video-thumb-item {
    position: relative;
    border-radius: 10px;
    overflow: hidden;
    cursor: pointer;
    transition: transform 0.3s ease;
}

.video-thumb-item:hover {
    transform: translateY(-3px);
}

.video-thumb-item img {
    width: 100%;
    height: 80px;
    object-fit: cover;
    transition: transform 0.3s ease;
}

.thumb-overlay {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 123, 255, 0.85);
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    opacity: 0;
    transition: all 0.3s ease;
}

.video-thumb-item:hover .thumb-overlay {
    opacity: 1;
}

.video-thumb-item:hover img {
    transform: scale(1.1);
}

.thumb-overlay i {
    font-size: 1.2rem;
    color: white;
    margin-bottom: 5px;
}

.thumb-overlay span {
    color: white;
    font-size: 0.8rem;
    font-weight: 500;
    text-align: center;
}

/* 整合区域响应式设计 */
@media (max-width: 1024px) {
    .intro-video-content {
        gap: 40px;
    }
    
    .intro-text-section,
    .video-section {
        padding: 0;
    }
}

@media (max-width: 768px) {
    .intro-video-content {
        grid-template-columns: 1fr;
        gap: 50px;
    }
    
    .intro-text-section {
        order: 2;
    }
    
    .video-section {
        order: 1;
    }
    
    .main-video .video-poster,
    .main-video #company-video {
        height: 220px;
    }
    
    .main-video .play-button {
        width: 60px;
        height: 60px;
    }
    
    .main-video .play-button i {
        font-size: 1.3rem;
    }
    

    
    .video-thumbnails {
        gap: 10px;
    }
    
    .video-thumb-item img {
        height: 70px;
    }
}

/* ===============================
   产品分类页面样式
   =============================== */

/* 分类导航 */
.category-nav {
    display: flex;
    justify-content: center;
    gap: 20px;
    margin: 40px 0 60px;
    flex-wrap: wrap;
}

.category-btn {
    background: white;
    border: 2px solid #e9ecef;
    padding: 12px 24px;
    border-radius: 25px;
    cursor: pointer;
    transition: all 0.3s ease;
    font-size: 1rem;
    font-weight: 500;
    color: #666;
    min-width: 120px;
}

.category-btn:hover {
    border-color: #007bff;
    color: #007bff;
    transform: translateY(-2px);
}

.category-btn.active {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    border-color: transparent;
    color: white;
    transform: translateY(-2px);
    box-shadow: 0 8px 20px rgba(102, 126, 234, 0.3);
}

/* 产品分类区域 */
.product-category {
    margin-bottom: 80px;
    opacity: 1;
    visibility: visible;
    transition: all 0.5s ease;
}

.product-category.hidden {
    opacity: 0;
    visibility: hidden;
    height: 0;
    overflow: hidden;
    margin: 0;
}

.category-header {
    text-align: center;
    margin-bottom: 40px;
}

.category-title {
    color: #2c3e50;
    font-size: 2.2rem;
    margin-bottom: 15px;
    font-weight: 600;
}

.category-description {
    color: #666;
    font-size: 1.1rem;
    line-height: 1.6;
    max-width: 600px;
    margin: 0 auto;
}

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

.product-item {
    position: relative;
    background: white;
    border-radius: 15px;
    overflow: hidden;
    box-shadow: 0 8px 20px rgba(0, 0, 0, 0.1);
    transition: all 0.3s ease;
    cursor: pointer;
}

.product-item:hover {
    transform: translateY(-8px);
    box-shadow: 0 15px 35px rgba(0, 0, 0, 0.15);
}

.product-item img {
    width: 100%;
    height: 250px;
    object-fit: cover;
    transition: transform 0.3s ease;
}

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

.product-overlay {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 60px;
    background: rgba(0, 123, 255, 0.85);
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    opacity: 0;
    transition: all 0.3s ease;
}

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

.product-overlay i {
    font-size: 3rem;
    color: white;
    margin-bottom: 10px;
}

.product-overlay span {
    color: white;
    font-size: 1.1rem;
    font-weight: 600;
}

.product-item h4 {
    padding: 20px;
    margin: 0;
    color: #2c3e50;
    font-size: 1.2rem;
    font-weight: 600;
    text-align: center;
    background: white;
}

/* 图片预览模态框 */
.image-modal {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    z-index: 10000;
    opacity: 0;
    visibility: hidden;
    transition: all 0.3s ease;
}

.image-modal.show {
    opacity: 1;
    visibility: visible;
}

.image-modal .modal-overlay {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.9);
    cursor: pointer;
}

.image-modal .modal-content {
    position: relative;
    width: 90%;
    max-width: 800px;
    max-height: 90vh;
    margin: 5vh auto;
    display: flex;
    flex-direction: column;
    align-items: center;
    transform: scale(0.8);
    transition: transform 0.3s ease;
}

.image-modal.show .modal-content {
    transform: scale(1);
}

.modal-close {
    position: absolute;
    top: -50px;
    right: 0;
    background: rgba(255, 255, 255, 0.2);
    border: none;
    width: 40px;
    height: 40px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    transition: all 0.3s ease;
    z-index: 10001;
}

.modal-close:hover {
    background: rgba(255, 255, 255, 0.3);
    transform: scale(1.1);
}

.modal-close i {
    color: white;
    font-size: 1.2rem;
}

#previewImage {
    max-width: 100%;
    max-height: 70vh;
    object-fit: contain;
    border-radius: 10px;
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.3);
}

.image-info {
    margin-top: 20px;
    text-align: center;
}

.image-info h3 {
    color: white;
    font-size: 1.5rem;
    margin: 0;
    font-weight: 600;
}

/* 产品分类响应式设计 */
@media (max-width: 768px) {
    .category-nav {
        gap: 10px;
        margin: 30px 0 40px;
    }
    
    .category-btn {
        padding: 10px 16px;
        font-size: 0.9rem;
        min-width: 90px;
    }
    
    .category-title {
        font-size: 1.8rem;
    }
    
    .product-grid {
        grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
        gap: 20px;
    }
    
    .product-item img {
        height: 200px;
    }
    
    .product-overlay i {
        font-size: 2rem;
    }
    
    .product-overlay span {
        font-size: 1rem;
    }
    
    .modal-close {
        top: -40px;
        width: 35px;
        height: 35px;
    }
    
    #previewImage {
        max-height: 60vh;
    }
}

@media (max-width: 480px) {
    .category-nav {
        flex-direction: column;
        align-items: center;
        gap: 15px;
    }
    
    .category-btn {
        width: 200px;
        text-align: center;
    }
    
    .product-grid {
        grid-template-columns: 1fr;
        gap: 20px;
    }
    
    .category-title {
        font-size: 1.6rem;
    }
    
    .category-description {
        font-size: 1rem;
    }
}

/* ===============================
   联系我们页面样式（新版左右布局）
   =============================== */

/* 主要联系区域 */
.main-contact-section {
    padding: 80px 0;
    background: linear-gradient(135deg, #f8f9fa 0%, #e9ecef 100%);
}

/* 居中布局容器 */
.contact-main-content-centered {
    display: flex;
    justify-content: center;
    align-items: flex-start;
    margin-top: 50px;
}

.contact-info-centered {
    max-width: 800px;
    width: 100%;
}

/* 左右布局容器 */
.contact-main-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 60px;
    margin-top: 50px;
    align-items: start;
}

/* 左侧联系信息面板 */
.contact-info-panel {
    padding-right: 20px;
}

.contact-card {
    background: white;
    border-radius: 20px;
    padding: 40px;
    box-shadow: 0 15px 40px rgba(0, 0, 0, 0.1);
    position: relative;
    overflow: hidden;
}

.contact-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 5px;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
}

.contact-header {
    text-align: center;
    margin-bottom: 40px;
    padding-bottom: 20px;
    border-bottom: 2px solid #f1f3f4;
}

.contact-header h3 {
    color: #2c3e50;
    font-size: 2rem;
    margin-bottom: 10px;
    font-weight: 700;
}

.contact-header p {
    color: #666;
    font-size: 1.1rem;
    margin: 0;
}

/* 联系详情列表 */
.contact-details {
    display: flex;
    flex-direction: column;
    gap: 30px;
}

.contact-detail-item {
    display: flex;
    align-items: flex-start;
    gap: 20px;
    padding: 25px;
    background: #f8f9fa;
    border-radius: 15px;
    transition: all 0.3s ease;
}

.contact-detail-item:hover {
    background: #e9ecef;
    transform: translateY(-3px);
    box-shadow: 0 8px 25px rgba(0, 0, 0, 0.1);
}

.detail-icon {
    width: 50px;
    height: 50px;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
}

.detail-icon i {
    font-size: 1.3rem;
    color: white;
}

.detail-content {
    flex: 1;
}

.detail-content h4 {
    color: #2c3e50;
    font-size: 1.3rem;
    margin-bottom: 10px;
    font-weight: 600;
}

.detail-content p {
    color: #666;
    font-size: 1rem;
    line-height: 1.6;
    margin-bottom: 8px;
}

.detail-content p:last-of-type {
    margin-bottom: 15px;
}

.detail-link {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    color: #007bff;
    text-decoration: none;
    font-weight: 500;
    padding: 8px 16px;
    border-radius: 20px;
    background: rgba(0, 123, 255, 0.1);
    transition: all 0.3s ease;
    font-size: 0.9rem;
}

.detail-link:hover {
    background: #007bff;
    color: white;
    transform: translateY(-2px);
}

/* 右侧表单面板 */
.contact-form-panel {
    padding-left: 20px;
}

.form-card {
    background: white;
    border-radius: 20px;
    padding: 40px;
    box-shadow: 0 15px 40px rgba(0, 0, 0, 0.1);
    position: relative;
    overflow: hidden;
}

.form-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 5px;
    background: linear-gradient(135deg, #764ba2 0%, #667eea 100%);
}

.form-header {
    text-align: center;
    margin-bottom: 30px;
    padding-bottom: 20px;
    border-bottom: 2px solid #f1f3f4;
}

.form-header h3 {
    color: #2c3e50;
    font-size: 2rem;
    margin-bottom: 10px;
    font-weight: 700;
}

.form-header p {
    color: #666;
    font-size: 1rem;
    margin: 0;
}

/* 表单样式 */
.contact-form .form-group {
    margin-bottom: 25px;
}

.contact-form label {
    display: block;
    color: #2c3e50;
    font-weight: 600;
    margin-bottom: 8px;
    font-size: 1rem;
}

.contact-form input,
.contact-form select,
.contact-form textarea {
    width: 100%;
    padding: 15px 20px;
    border: 2px solid #e9ecef;
    border-radius: 10px;
    font-size: 1rem;
    transition: all 0.3s ease;
    background: #f8f9fa;
    box-sizing: border-box;
}

.contact-form input:focus,
.contact-form select:focus,
.contact-form textarea:focus {
    outline: none;
    border-color: #007bff;
    background: white;
    box-shadow: 0 0 0 3px rgba(0, 123, 255, 0.1);
}

.contact-form select {
    cursor: pointer;
}

.contact-form textarea {
    resize: vertical;
    min-height: 120px;
}

.form-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 20px;
}

.form-actions {
    display: flex;
    gap: 15px;
    justify-content: flex-start;
    margin-top: 30px;
}

.form-actions .btn {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 15px 30px;
    font-size: 1rem;
    font-weight: 600;
    border-radius: 10px;
    transition: all 0.3s ease;
    cursor: pointer;
    border: none;
}

.btn-primary {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 20px rgba(102, 126, 234, 0.3);
}

.btn-secondary {
    background: #6c757d;
    color: white;
}

.btn-secondary:hover {
    background: #5a6268;
    transform: translateY(-2px);
}

/* 响应式设计 */
@media (max-width: 1024px) {
    .contact-main-content {
        gap: 40px;
    }
    
    .contact-main-content-centered {
        margin-top: 30px;
    }
    
    .contact-info-centered {
        max-width: 700px;
    }
    
    .contact-info-panel,
    .contact-form-panel {
        padding: 0;
    }
    
    .contact-card,
    .form-card {
        padding: 30px;
    }
}

@media (max-width: 768px) {
    .main-contact-section {
        padding: 60px 0;
    }
    
    .contact-main-content {
        grid-template-columns: 1fr;
        gap: 40px;
    }
    
    .contact-main-content-centered {
        margin-top: 20px;
    }
    
    .contact-info-centered {
        max-width: 100%;
    }
    
    .contact-card,
    .form-card {
        padding: 25px 20px;
    }
    
    .contact-header h3,
    .form-header h3 {
        font-size: 1.6rem;
    }
    
    .contact-detail-item {
        padding: 20px;
        flex-direction: column;
        text-align: center;
        gap: 15px;
    }
    
    .form-row {
        grid-template-columns: 1fr;
        gap: 0;
    }
    
    .form-actions {
        flex-direction: column;
        align-items: stretch;
    }
    
    .form-actions .btn {
        justify-content: center;
    }
}

@media (max-width: 480px) {
    .contact-main-content-centered {
        margin-top: 15px;
    }
    
    .contact-card,
    .form-card {
        padding: 20px 15px;
    }
    
    .contact-details {
        gap: 20px;
    }
    
    .contact-detail-item {
        padding: 15px;
    }
    
    .detail-icon {
        width: 40px;
        height: 40px;
    }
    
    .detail-icon i {
        font-size: 1.1rem;
    }
}

/* 消息提示样式 */
.message-toast {
    position: fixed;
    top: 20px;
    right: 20px;
    z-index: 10000;
    background: white;
    border-radius: 10px;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.2);
    min-width: 300px;
    max-width: 500px;
    padding: 15px 20px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    transform: translateX(100%);
    opacity: 0;
    transition: all 0.3s ease;
    border-left: 4px solid #007bff;
}

.message-toast.show {
    transform: translateX(0);
    opacity: 1;
}

.message-toast.message-success {
    border-left-color: #28a745;
}

.message-toast.message-error {
    border-left-color: #dc3545;
}

.message-toast.message-warning {
    border-left-color: #ffc107;
}

.message-content {
    display: flex;
    align-items: center;
    gap: 10px;
    flex: 1;
}

.message-content i {
    font-size: 1.2rem;
}

.message-success .message-content i {
    color: #28a745;
}

.message-error .message-content i {
    color: #dc3545;
}

.message-warning .message-content i {
    color: #ffc107;
}

.message-content span {
    font-size: 1rem;
    color: #333;
    font-weight: 500;
}

.message-close {
    background: none;
    border: none;
    color: #999;
    cursor: pointer;
    padding: 5px;
    border-radius: 50%;
    transition: all 0.3s ease;
    margin-left: 10px;
}

.message-close:hover {
    background: #f8f9fa;
    color: #666;
}

@media (max-width: 768px) {
    .message-toast {
        top: 10px;
        right: 10px;
        left: 10px;
        min-width: auto;
        max-width: none;
    }
}

/* 产品轮播图样式 */
.product-carousel-section {
    padding: 80px 0;
    background: linear-gradient(135deg, #f8f9fa 0%, #e9ecef 100%);
    overflow: hidden;
}

.product-carousel-container {
    width: 100%;
    overflow: hidden;
    position: relative;
    border-radius: 15px;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.1);
    background: white;
    padding: 20px 0;
}

.product-carousel-track {
    display: flex;
    animation: scroll 60s linear infinite;
    width: calc(200px * 28); /* 14个图片 * 2倍 = 28个图片的宽度 */
}

.product-carousel-item {
    flex: 0 0 200px;
    height: 150px;
    margin: 0 10px;
    border-radius: 10px;
    overflow: hidden;
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.1);
    transition: transform 0.3s ease;
}

.product-carousel-item:hover {
    transform: translateY(-5px);
    box-shadow: 0 8px 25px rgba(0, 0, 0, 0.15);
}

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

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

@keyframes scroll {
    0% {
        transform: translateX(0);
    }
    100% {
        transform: translateX(calc(-200px * 14 - 140px)); /* 移动14个图片的距离 */
    }
}

/* 暂停动画当鼠标悬停 */
.product-carousel-container:hover .product-carousel-track {
    animation-play-state: paused;
}

/* 响应式设计 */
@media (max-width: 768px) {
    .hero {
        height: 70vh;
        min-height: 500px;
    }
    
    .hero-title {
        font-size: 2.5rem;
    }
    
    .hero-subtitle {
        font-size: 1.2rem;
    }
    
    .product-carousel-section {
        padding: 60px 0;
    }
    
    .product-carousel-item {
        flex: 0 0 150px;
        height: 120px;
        margin: 0 8px;
    }
    
    .product-carousel-track {
        width: calc(170px * 28);
    }
    
    @keyframes scroll {
        0% {
            transform: translateX(0);
        }
        100% {
            transform: translateX(calc(-170px * 14 - 112px));
        }
    }
}

@media (max-width: 480px) {
    .product-carousel-item {
        flex: 0 0 120px;
        height: 100px;
        margin: 0 5px;
    }
    
    .product-carousel-track {
        width: calc(130px * 28);
    }
    
    @keyframes scroll {
        0% {
            transform: translateX(0);
        }
        100% {
            transform: translateX(calc(-130px * 14 - 70px));
        }
    }
}

/* 针对大屏幕优化导航栏 */
@media (min-width: 1401px) {
    .nav-container {
        max-width: 1600px;
        padding: 0 20px;
    }
    
    .nav-menu {
        gap: 12px;
    }
    
    .nav-link {
        padding: 12px 10px;
        font-size: 0.85rem;
    }
}

/* 针对中等屏幕优化导航栏 */
@media (max-width: 1400px) and (min-width: 769px) {
    .nav-container {
        max-width: 100%;
        padding: 0 10px;
    }
    
    .nav-menu {
        gap: 5px;
    }
    
    .nav-link {
        padding: 8px 6px;
        font-size: 0.75rem;
    }
    
    .nav-logo h2 {
        font-size: 1.0rem;
    }
    
    .language-switch {
        margin-left: 5px;
    }
}

/* 工厂介绍页面样式 */
.main-content {
    margin-top: 80px;
}

.factory-intro-section {
    padding: 80px 0;
    background: linear-gradient(135deg, #f8f9fa 0%, #e9ecef 100%);
}

.factory-intro-section .section-header {
    text-align: center;
    margin-bottom: 60px;
}

.factory-intro-section .section-title {
    font-size: 3rem;
    font-weight: 700;
    color: #2c3e50;
    margin-bottom: 20px;
    position: relative;
}

.factory-intro-section .section-title::after {
    content: '';
    position: absolute;
    bottom: -10px;
    left: 50%;
    transform: translateX(-50%);
    width: 80px;
    height: 4px;
    background: linear-gradient(90deg, #3498db, #2980b9);
    border-radius: 2px;
}

.factory-intro-section .section-subtitle {
    font-size: 1.2rem;
    color: #7f8c8d;
    font-weight: 400;
}

.factory-intro-content {
    max-width: 1000px;
    margin: 0 auto;
}

.intro-text h2 {
    font-size: 2.2rem;
    color: #2c3e50;
    margin-bottom: 30px;
    font-weight: 600;
}

.intro-text h3 {
    font-size: 1.8rem;
    color: #34495e;
    margin: 40px 0 20px 0;
    font-weight: 600;
}

.intro-text p {
    font-size: 1.1rem;
    line-height: 1.8;
    color: #555;
    margin-bottom: 25px;
    text-align: justify;
}





/* 工厂图片展示区域 */
.factory-image-section {
    padding: 80px 0;
    background: #fff;
}

.factory-image-container {
    position: relative;
    max-width: 1200px;
    margin: 0 auto;
    border-radius: 20px;
    overflow: hidden;
    box-shadow: 0 15px 50px rgba(0, 0, 0, 0.15);
    opacity: 1 !important;
    visibility: visible !important;
    display: block !important;
}

.factory-image {
    width: 100%;
    height: 600px;
    object-fit: cover;
    display: block !important;
    opacity: 1 !important;
    visibility: visible !important;
    transform: none !important;
}

.image-overlay {
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    background: linear-gradient(transparent, rgba(0, 0, 0, 0.5));
    color: white;
    padding: 60px 40px 40px;
    text-align: center;
    pointer-events: none; /* 允许点击穿透到图片 */
}

/* 工厂图片画廊 */
.factory-gallery {
    margin-top: 60px;
}

.gallery-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: 30px;
    margin-top: 40px;
}

.gallery-item {
    position: relative;
    border-radius: 15px;
    overflow: hidden;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.1);
    transition: all 0.3s ease;
    cursor: pointer;
}

.gallery-item:hover {
    transform: translateY(-10px);
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.2);
}

.gallery-image {
    width: 100%;
    height: 250px;
    object-fit: cover;
    display: block;
    transition: transform 0.3s ease;
}

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

.gallery-overlay {
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    background: linear-gradient(transparent, rgba(0, 0, 0, 0.8));
    color: white;
    padding: 30px 20px 20px;
    text-align: center;
    transform: translateY(100%);
    transition: transform 0.3s ease;
}

.gallery-item:hover .gallery-overlay {
    transform: translateY(0);
}

.gallery-overlay h4 {
    margin: 0;
    font-size: 1.2rem;
    font-weight: 600;
}

.image-overlay h3 {
    font-size: 2.2rem;
    font-weight: 600;
    margin-bottom: 15px;
    text-shadow: 2px 2px 4px rgba(0, 0, 0, 0.5);
}

.image-overlay p {
    font-size: 1.2rem;
    font-weight: 400;
    opacity: 0.9;
    text-shadow: 1px 1px 2px rgba(0, 0, 0, 0.5);
}

/* 响应式设计 - 工厂页面 */
@media (max-width: 1200px) {
    .factory-intro-section .section-title {
        font-size: 2.5rem;
    }
    
    .intro-text h2 {
        font-size: 2rem;
    }
    
    .intro-text h3 {
        font-size: 1.6rem;
    }
    

}

@media (max-width: 768px) {
    .factory-intro-section {
        padding: 60px 0;
    }
    
    .factory-intro-section .section-header {
        margin-bottom: 40px;
    }
    
    .factory-intro-section .section-title {
        font-size: 2.2rem;
    }
    
    .factory-intro-section .section-subtitle {
        font-size: 1.1rem;
    }
    
    .intro-text h2 {
        font-size: 1.8rem;
        margin-bottom: 25px;
    }
    
    .intro-text h3 {
        font-size: 1.5rem;
        margin: 30px 0 15px 0;
    }
    
    .intro-text p {
        font-size: 1rem;
        margin-bottom: 20px;
    }
    

    
    .factory-image-section {
        padding: 60px 0;
    }
    
    .factory-image {
        height: 400px;
    }
    
    .image-overlay {
        padding: 40px 30px 30px;
    }
    
    .image-overlay h3 {
        font-size: 1.8rem;
        margin-bottom: 10px;
    }
    
    .image-overlay p {
        font-size: 1.1rem;
    }
    
    .factory-gallery {
        margin-top: 40px;
    }
    
    .gallery-grid {
        grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
        gap: 20px;
    }
    
    .gallery-image {
        height: 200px;
    }
}

@media (max-width: 480px) {
    .factory-intro-section {
        padding: 40px 0;
    }
    
    .factory-intro-section .section-title {
        font-size: 1.8rem;
    }
    
    .factory-intro-section .section-subtitle {
        font-size: 1rem;
    }
    
    .intro-text h2 {
        font-size: 1.6rem;
        margin-bottom: 20px;
    }
    
    .intro-text h3 {
        font-size: 1.3rem;
        margin: 25px 0 12px 0;
    }
    
    .intro-text p {
        font-size: 0.95rem;
        margin-bottom: 18px;
    }
    

    
    .factory-image-section {
        padding: 40px 0;
    }
    
    .factory-image {
        height: 300px;
    }
    
    .image-overlay {
        padding: 30px 20px 20px;
    }
    
    .image-overlay h3 {
        font-size: 1.5rem;
        margin-bottom: 8px;
    }
    
    .factory-gallery {
        margin-top: 30px;
    }
    
    .gallery-grid {
        grid-template-columns: 1fr;
        gap: 15px;
    }
    
    .gallery-image {
        height: 180px;
    }
    
    .gallery-overlay h4 {
        font-size: 1rem;
    }
}

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

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

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

@keyframes typewriter {
    from {
        width: 0;
    }
    to {
        width: 100%;
    }
}

@keyframes blink {
    0%, 50% {
        border-color: transparent;
    }
    51%, 100% {
        border-color: #007bff;
    }
}

@keyframes scaleIn {
    from {
        opacity: 0;
        transform: scale(0.8);
    }
    to {
        opacity: 1;
        transform: scale(1);
    }
}

@keyframes slideInFromBottom {
    from {
        opacity: 0;
        transform: translateY(50px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* 动画类 */
.animate-fade-in-up {
    animation: fadeInUp 0.8s ease-out forwards;
    opacity: 0;
}

.animate-fade-in-left {
    animation: fadeInLeft 0.8s ease-out forwards;
    opacity: 0;
}

.animate-fade-in-right {
    animation: fadeInRight 0.8s ease-out forwards;
    opacity: 0;
}

.animate-scale-in {
    animation: scaleIn 0.6s ease-out forwards;
    opacity: 0;
}

.animate-slide-in-bottom {
    animation: slideInFromBottom 0.8s ease-out forwards;
    opacity: 0;
    transform: translateY(50px);
}

.animate-slide-in-bottom.animation-triggered {
    opacity: 1;
    transform: translateY(0);
}

.animate-typewriter {
    overflow: hidden;
    border-right: 2px solid #007bff;
    white-space: nowrap;
    animation: typewriter 2s steps(40, end), blink 1s infinite;
}

/* 延迟动画 */
.animate-delay-1 {
    animation-delay: 0.2s;
}

.animate-delay-2 {
    animation-delay: 0.4s;
}

.animate-delay-3 {
    animation-delay: 0.6s;
}

.animate-delay-4 {
    animation-delay: 0.8s;
}

.animate-delay-5 {
    animation-delay: 1s;
}

/* 工厂页面特定动画 */
.factory-intro-section .section-title {
    position: relative;
}

.factory-intro-section .section-title.animate-typewriter::after {
    display: none;
}



/* 图片容器动画 */
.factory-image-container {
    overflow: hidden;
}

.factory-image {
    transition: transform 0.5s ease;
}

.factory-image-container:hover .factory-image {
    transform: scale(1.05);
}

.image-overlay {
    transition: background-color 0.3s ease;
}

.factory-image-container:hover .image-overlay {
    background: linear-gradient(135deg, rgba(0, 123, 255, 0.9), rgba(0, 86, 179, 0.9));
}

/* ===============================
   品牌展示网格样式
   =============================== */

.brands-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 30px;
    margin-top: 50px;
    padding: 40px 0;
}

.brands-grid .brand-item {
    background: white;
    border-radius: 15px;
    padding: 30px;
    box-shadow: 0 8px 25px rgba(0, 0, 0, 0.1);
    transition: all 0.3s ease;
    display: flex;
    align-items: center;
    justify-content: center;
    min-height: 120px;
}

.brands-grid .brand-item:hover {
    transform: translateY(-8px);
    box-shadow: 0 15px 35px rgba(0, 0, 0, 0.15);
}

.brands-grid .brand-logo {
    max-width: 100%;
    max-height: 80px;
    object-fit: contain;
    transition: transform 0.3s ease;
}

.brands-grid .brand-item:hover .brand-logo {
    transform: scale(1.1);
}

/* 响应式设计 */
@media (max-width: 768px) {
    .brands-grid {
        grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
        gap: 20px;
        padding: 30px 0;
    }
    
    .brands-grid .brand-item {
        padding: 20px;
        min-height: 100px;
    }
    
    .brands-grid .brand-logo {
        max-height: 60px;
    }
}

@media (max-width: 480px) {
    .brands-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: 15px;
        padding: 20px 0;
    }
    
    .brands-grid .brand-item {
        padding: 15px;
        min-height: 80px;
    }
    
    .brands-grid .brand-logo {
        max-height: 50px;
    }
}

/* ===== 视频页面样式 ===== */

/* 页面标题区域 */
.page-header {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    padding: 80px 0 60px;
    text-align: center;
    position: relative;
    overflow: hidden;
}

.page-header::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.3);
    z-index: 1;
}

.page-title-content {
    position: relative;
    z-index: 2;
    max-width: 800px;
    margin: 0 auto;
    padding: 0 20px;
}

.page-title {
    font-size: 3rem;
    font-weight: 700;
    margin-bottom: 20px;
    text-shadow: 2px 2px 4px rgba(0, 0, 0, 0.3);
}

.page-subtitle {
    font-size: 1.2rem;
    line-height: 1.6;
    opacity: 0.9;
    max-width: 600px;
    margin: 0 auto;
}

/* 视频展示区域 */
.videos-showcase {
    padding: 80px 0;
    background: #f8f9fa;
}

/* 区域标题 */
.section-header {
    text-align: center;
    margin-bottom: 50px;
}

.section-header .section-title {
    font-size: 2.5rem;
    color: #333;
    margin-bottom: 20px;
    font-weight: 700;
}

.section-header .section-subtitle {
    font-size: 1.1rem;
    color: #666;
    max-width: 600px;
    margin: 0 auto;
    line-height: 1.6;
}

/* 视频网格 */
.videos-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: 30px;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

/* 视频项目 */
.video-item {
    background: white;
    border-radius: 15px;
    overflow: hidden;
    box-shadow: 0 5px 20px rgba(0, 0, 0, 0.1);
    transition: all 0.3s ease;
}

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

/* 视频元素 */
.video-item video {
    width: 100%;
    height: 250px;
    object-fit: cover;
    display: block;
}

/* 视频信息 */
.video-info {
    padding: 20px;
    text-align: center;
}

.video-title {
    font-size: 1.2rem;
    color: #333;
    margin: 0;
    font-weight: 600;
    line-height: 1.4;
}

/* 响应式设计 */
@media (max-width: 768px) {
    .page-title {
        font-size: 2.2rem;
    }
    
    .page-subtitle {
        font-size: 1.1rem;
    }
    
    .videos-grid {
        grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
        gap: 20px;
        padding: 0 15px;
    }
    
    .section-header .section-title {
        font-size: 2rem;
    }
    
    .video-item video {
        height: 200px;
    }
    
    .video-info {
        padding: 20px;
    }
    
    .video-title {
        font-size: 1.2rem;
    }
}

@media (max-width: 480px) {
    .page-header {
        padding: 60px 0 40px;
    }
    
    .page-title {
        font-size: 1.8rem;
    }
    
    .page-subtitle {
        font-size: 1rem;
    }
    
    .videos-showcase {
        padding: 60px 0;
    }
    
    .videos-grid {
        grid-template-columns: 1fr;
        gap: 20px;
    }
    
    .section-header .section-title {
        font-size: 1.8rem;
    }
    
    .video-item video {
        height: 180px;
    }
    
    .video-title {
        font-size: 1.1rem;
    }
    
    .video-info {
        padding: 15px;
    }
}