/* 顶部导航 - 桌面端 */
        .desktop-header {
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            background: rgba(0, 0, 0, 0.8); /* 默认深色背景 */
            color: white;
            z-index: 999;
            transition: all 0.3s ease;
        }

        .desktop-header.scroll {
            background: #333; /* 滚动后白色背景 */
            color: #fff;
            box-shadow: 0 2px 10px rgba(0,0,0,0.1);
        }

        .header-content {
            display: flex;
            justify-content: space-between;
            align-items: center;
            height: 100px;
            transition: height 0.3s ease;
        }

        .desktop-header.scroll .header-content {
            height: 70px;
        }

        /* LOGO样式 - 修复显示问题 */
        .logo {
	display: flex;
	align-items: center;
	position: relative;
	height: 60px; /* 固定LOGO高度 */
	width: auto; /* 自动适应LOGO宽度 */
	overflow: hidden; /* 防止溢出 */
        }

        /* 默认LOGO（深色背景时显示 - 通常为白色/浅色LOGO） */
        .logo-default {
	display: block;
	height: 60px;
	transition: opacity 0.3s ease;
        }

        /* 滚动后LOGO（白色背景时显示 - 通常为黑色/深色LOGO） */
        .logo-scroll {
            opacity: 0;
            height: 100%;
            position: absolute;
            left: 0;
            top: 0;
            transition: opacity 0.3s ease;
            pointer-events: none; /* 防止交互问题 */
        }

        /* 滚动状态切换LOGO显示 - 使用透明度过渡更平滑 */
        .desktop-header.scroll .logo-default {
            opacity: 0;
            pointer-events: none;
        }

        .desktop-header.scroll .logo-scroll {
            opacity: 1;
            pointer-events: auto;
        }

        .main-nav {
            display: flex;
            align-items: center;
        }

        .nav-list {
            display: flex;
            margin-right: 20px;
        }

        .nav-item {
            position: relative;
            margin: 0 8px;
        }

        .nav-link {
	display: block;
	line-height: 100px;
	font-size: 17px;
	transition: color 0.3s ease;
	padding-top: 0;
	padding-right: 18px;
	padding-bottom: 0;
	padding-left: 18px;
        }

        .desktop-header.scroll .nav-link {
            line-height: 70px;
        }

        .nav-link:hover, .nav-link.active {
            color: #0f6ab4;
        }

        /* 下拉箭头样式 */
        .has-dropdown:after {
            content: "";
            display: inline-block;
            margin-left: 6px;
            width: 0;
            height: 0;
            border-left: 4px solid transparent;
            border-right: 4px solid transparent;
            border-top: 4px solid currentColor;
            vertical-align: middle;
        }

        /* 下拉菜单 */
        .dropdown {
            position: absolute;
            top: 100%;
            left: 0;
            background: #fff;
            color: #333;
            box-shadow: 0 5px 15px rgba(0,0,0,0.1);
            border-radius: 4px;
            z-index: 1000;
            display: none;
        }

        .nav-item:hover .dropdown {
            display: block;
            animation: fadeIn 0.3s ease;
        }

        /* 产品中心下拉菜单布局 - 调整宽度和列宽 */
        .product-dropdown {
         min-width: 900px; /* 增加总宽度以容纳更均衡的列 */
            padding: 20px;
			left:-150px;
        }

        .product-grid {
           display: grid;
            grid-template-columns: 30% 30% 40%; /* 调整三列宽度比例，更均衡 */
            gap: 20px; /* 列间距 */
        }

        /* 第7个类别子菜单横向排列 */
        .product-grid > div:nth-child(7) .product-items-container {
            display: flex;
            gap: 20px; /* 子项间距 */
            flex-wrap: wrap; /* 确保在小空间下自动换行 */
        }

        .product-grid > div:nth-child(7) .product-item {
            flex: 1; /* 平均分配空间 */
            min-width: 120px; /* 最小宽度，确保可读性 */
        }

        /* 第7个类别横跨3列底部显示 */
        .product-grid > div:nth-child(7) {
            grid-column: span 3; /* 横跨3列 */
            margin-top: 10px;
            padding-top: 10px;
            border-top: 1px dashed #eee;
        }


 .product-category {
            font-weight: 600;
            color: #0f6ab4;
            padding-bottom: 5px;
            margin-bottom: 10px;
            border-bottom: 1px solid #0f6ab4;
        }

        .product-item {
            display: block;
            padding: 5px 0;
            font-size: 14px;
            transition: all 0.2s ease;
        }

        .product-item:hover {
            color: #0f6ab4;
            transform: translateX(5px);
        }

        /* 其他样式保持不变 */
        .simple-dropdown {
            min-width: 200px;
        }

        .simple-dropdown a {
            display: block;
            padding: 10px 15px;
            font-size: 14px;
            transition: all 0.2s ease;
        }

        .simple-dropdown a:hover {
            background: #f0f7ff;
            color: #0f6ab4;
            padding-left: 20px;
        }

        .language-switch {
            position: relative;
            margin-left: 15px;
            cursor: pointer;
        }

        .language-trigger {
            display: flex;
            align-items: center;
            padding: 5px 10px;
        }

        .language-icon {
            margin-right: 8px;
            font-size: 16px;
        }

        .language-text {
            font-size: 14px;
        }

        .language-dropdown {
            position: absolute;
            top: 100%;
            right: 0;
            background: #fff;
            color: #333;
            box-shadow: 0 3px 10px rgba(0,0,0,0.1);
            border-radius: 4px;
            min-width: 100px;
            overflow: hidden;
            z-index: 1000;
            display: none;
        }

        .language-dropdown.active {
            display: block;
        }

        .language-option {
            display: block;
            padding: 8px 15px;
            font-size: 14px;
            transition: background 0.2s ease;
        }

        .language-option:hover, .language-option.active {
            background: #f0f7ff;
            color: #0f6ab4;
        }

        .search-container {
            position: relative;
        }

        .search-btn {
            width: 30px;
            height: 30px;
            margin-left: 15px;
            cursor: pointer;
            display: flex;
            align-items: center;
            justify-content: center;
        }

        .search-box {
            position: absolute;
            top: 100%;
            right: 0;
            background: #fff;
            box-shadow: 0 5px 15px rgba(0,0,0,0.1);
            border-radius: 4px;
            width: 320px;
            padding: 15px;
            z-index: 1002;
            display: none;
            transform: translateY(10px);
            opacity: 0;
            transition: all 0.3s ease;
        }

        .search-box.active {
            display: block;
            transform: translateY(0);
            opacity: 1;
        }

        .search-form {
            display: flex;
            align-items: center;
        }

        .search-input {
            flex: 1;
            padding: 10px 15px;
            border: 1px solid #eee;
            border-radius: 4px 0 0 4px;
            outline: none;
            font-size: 14px;
        }

        .search-input:focus {
            border-color: #0f6ab4;
        }

        .search-submit {
            background: #0f6ab4;
            color: white;
            border: none;
            padding: 10px 15px;
            border-radius: 0 4px 4px 0;
            cursor: pointer;
            transition: background 0.3s ease;
        }

        .search-submit:hover {
            background: #0a508a;
        }

        /* 移动端导航 */
        .mobile-header {
            display: none;
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            height: 60px;
            background: #000000;
            box-shadow: 0 2px 10px rgba(0,0,0,0.1);
            z-index: 999;
            padding: 0 15px;
        }

        .mobile-header-content {
            display: flex;
            justify-content: space-between;
            align-items: center;
            height: 100%;
        }

        .mobile-logo img {
            height: 36px;
        }

        .mobile-nav-actions {
            display: flex;
            align-items: center;
        }

        .mobile-search-btn, .mobile-menu-btn {
            width: 40px;
            height: 40px;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 20px;
            color: #fff;
            cursor: pointer;
        }

        .mobile-search-btn {
            margin-right: 10px;
        }

        .mobile-menu {
            position: fixed;
            top: 60px;
            left: 0;
            right: 0;
            bottom: 0;
            background: #fff;
            z-index: 1000;
            transform: translateX(100%);
            transition: transform 0.3s ease;
            overflow-y: auto;
        }

        .mobile-menu.active {
            transform: translateX(0);
        }

        .mobile-menu-list {
            padding: 15px 0;
        }

        .mobile-menu-item {
            border-bottom: 1px solid #f5f5f5;
        }

        .mobile-menu-link {
	display: block;
	padding: 15px 20px;
	font-size: 18px;
	color: #333;
	display: flex;
	justify-content: space-between;
	align-items: center;
        }

        .mobile-menu-link:after {
            content: "+";
            font-size: 20px;
        }

        .mobile-menu-link.active:after {
            content: "-";
        }

        .mobile-submenu {
            background: #f9f9f9;
            display: none;
        }

        .mobile-submenu.active {
            display: block;
        }

        .mobile-submenu a {
            display: block;
            padding: 12px 20px 12px 40px;
            font-size: 14px;
            color: #666;
            border-bottom: 1px solid #f0f0f0;
        }

        .mobile-submenu a:last-child {
            border-bottom: none;
        }

        .mobile-search-container {
            display: none;
            position: fixed;
            top: 60px;
            left: 0;
            right: 0;
            background: #fff;
            padding: 15px;
            box-shadow: 0 2px 10px rgba(0,0,0,0.1);
            z-index: 998;
            transform: translateY(-100%);
            transition: transform 0.3s ease;
        }

        .mobile-search-container.active {
            transform: translateY(0);
        }

        .mobile-search-form {
            display: flex;
            gap: 10px;
        }

        .mobile-search-input {
            flex: 1;
            padding: 10px 15px;
            border: 1px solid #eee;
            border-radius: 4px;
            outline: none;
            font-size: 14px;
        }

        .mobile-search-submit {
            background: #0f6ab4;
            color: white;
            border: none;
            padding: 0 15px;
            border-radius: 4px;
            cursor: pointer;
            white-space: nowrap;
        }

        .placeholder-content {
            height: 2000px;
            padding-top: 120px;
            background: #f5f5f5;
        }

        @keyframes fadeIn {
            from { opacity: 0; transform: translateY(10px); }
            to { opacity: 1; transform: translateY(0); }
        }

        @media (max-width: 768px) {
            .desktop-header {
                display: none;
            }
            
            .mobile-header {
                display: block;
            }
            
            .mobile-search-container {
                display: block;
            }
        }




        /* 横幅区域 */
        .banner {
	margin-top: 0px;
	width: 100%;
        }

        .banner-img {
            width: 100%;
            height: 300px;
            object-fit: cover;
        }

        /* 主内容区 */
        .main-content {
            padding: 40px 0 60px;
        }

        .page-title {
            font-size: 24px;
            color: #333;
            margin-bottom: 15px;
        }

        .breadcrumb {
            font-size: 14px;
            color: #999;
            margin-bottom: 30px;
        }

        .breadcrumb a {
            color: #999;
        }

        .breadcrumb a:hover {
            color: #0f6ab4;
        }

        .breadcrumb span {
            margin: 0 8px;
            color: #ccc;
        }

        .content-wrapper {
            display: flex;
            gap: 30px;
        }

        /* 左侧产品分类 */
        .product-sidebar {
            width: 260px;
            flex-shrink: 0;
        }

        .sidebar-title {
            background: #0f6ab4;
            color: white;
            padding: 15px 20px;
            font-size: 18px;
            font-weight: 600;
            border-radius: 4px 4px 0 0;
        }

        .category-list {
            border: 1px solid #eee;
            border-top: none;
            border-radius: 0 0 4px 4px;
            overflow: hidden;
        }

        .category-item {
            border-bottom: 1px solid #eee;
        }

        .category-item:last-child {
            border-bottom: none;
        }

        .category-link {
            display: flex;
            justify-content: space-between;
            align-items: center;
            padding: 12px 20px;
            background: #fff;
            color: #333;
            font-size: 16px;
        }

        .category-link:hover {
            background: #f0f7ff;
            color: #0f6ab4;
        }

        .category-link.active {
            background: #e6f0ff;
            color: #0f6ab4;
        }

        .category-toggle {
            font-size: 16px;
        }

        .subcategory-list {
            background: #f9f9f9;
            display: none;
        }

        .subcategory-list.active {
            display: block;
        }

        .subcategory-item {
            display: block;
            padding: 10px 20px 10px 40px;
            color: #666;
            font-size: 14px;
            border-bottom: 1px solid #f0f0f0;
        }

        .subcategory-item:last-child {
            border-bottom: none;
        }

        .subcategory-item:hover {
            color: #0f6ab4;
            background: #f0f7ff;
        }

        .subcategory-item.current {
            color: #0f6ab4;
            font-weight: 500;
            background: #f0f7ff;
            position: relative;
        }

        .subcategory-item.current::before {
            content: '';
            position: absolute;
            left: 0;
            top: 0;
            width: 4px;
            height: 100%;
            background: #ff7d00;
        }

        /* 右侧产品展示 */
        .product-content {
            flex-grow: 1;
        }

        .product-grid {
            display: grid;
            grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
            gap: 25px;
        }

        .product-card {
            border-radius: 8px;
            overflow: hidden;
            box-shadow: 0 3px 10px rgba(0,0,0,0.05);
            transition: all 0.3s ease;
            background: #fff;
        }

        .product-card:hover {
            transform: translateY(-5px);
            box-shadow: 0 8px 20px rgba(0,0,0,0.1);
        }

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

        .product-img img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform 0.5s ease;
        }

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

        .product-info {
            padding: 20px;
        }

        .product-name {
            font-size: 16px;
            color: #333;
            margin-bottom: 10px;
            transition: color 0.3s ease;
        }

        .product-card:hover .product-name {
            color: #0f6ab4;
        }

        .product-desc {
            font-size: 14px;
            color: #666;
            line-height: 1.6;
            display: -webkit-box;
            -webkit-line-clamp: 3;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }

        /* 联系和返回顶部按钮 */
        .fixed-tools {
            position: fixed;
            bottom: 30px;
            right: 30px;
            z-index: 998;
            display: flex;
            flex-direction: column;
            gap: 15px;
        }

        .tool-btn {
            width: 45px;
            height: 45px;
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            color: white;
            font-size: 20px;
            box-shadow: 0 3px 10px rgba(0,0,0,0.2);
            cursor: pointer;
            transition: all 0.3s ease;
        }

        .tool-btn:hover {
            transform: translateY(-3px);
            box-shadow: 0 5px 15px rgba(0,0,0,0.3);
        }

        .phone-btn {
            background: #ff7d00;
            position: relative;
        }

        .wechat-btn {
            background: #07C160;
            position: relative;
        }

        .backtop-btn {
            background: #0f6ab4;
            opacity: 0;
            visibility: hidden;
            transition: all 0.3s ease;
        }

        .backtop-btn.active {
            opacity: 1;
            visibility: visible;
        }

        /* 联系弹窗 */
      
      
        .wechat-popup {
            position: absolute;
            right: 55px;
            bottom: 0;
            width: 150px;
            background: white;
            border-radius: 8px;
            box-shadow: 0 3px 15px rgba(0,0,0,0.15);
            padding: 10px;
            display: none;
        }

        .wechat-popup::after {
            content: '';
            position: absolute;
            right: -10px;
            top: 20px;
            border-left: 10px solid white;
            border-top: 10px solid transparent;
            border-bottom: 10px solid transparent;
        }

        .wechat-popup img {
            width: 100%;
            display: block;
            margin-bottom: 5px;
        }

        .wechat-popup p {
            font-size: 14px;
            color: #333;
            text-align: center;
            margin: 0;
        }

        .wechat-btn:hover .wechat-popup {
            display: block;
        }
		
		
		
		

/*search*/


/*热门搜索*/
.sou{background:#f1f0f0;height:63px;border-bottom:1px solid #dfdfdf;}
#formsearch{float:right;background:url(../images/ss.png) no-repeat;width:293px;height:33px;margin-top:15px;}
.hotSearch{float:left;height:63px;line-height:63px;font-weight:normal;font-size:14px;color:#000;}
#search-type{float: left;width:100px;height: 24px;border: 1px solid #c8c8c8;margin-right: 5px;}

/*搜索和热门搜索*/
.hotSearch a{margin:0 10px;color:#565656;}
#formsearch input{}
#formsearch input#keyword{height:33px;line-height:33px;padding-left:9px;color:#686868;font-size:13px;background:none;border:none;outline:none;}
#formsearch input#s_btn{width:43px;height:33px;line-height:33px;text-align:center;background-color:#3480ce;color:#fff;border:none;cursor:pointer;font-size: 12px;float:right;background:none;border:none;outline:none;}
input::-webkit-input-placeholder {color:#686868;}
textarea::-webkit-input-placeholder {color: #686868;}
		
		

        /* 页脚 */
        .footer {
            background: #000;
            color: #fff;
            padding: 50px 0 30px;
        }

        .footer-top {
            display: flex;
            flex-wrap: wrap;
            gap: 30px;
            padding-bottom: 30px;
            border-bottom: 1px solid #333;
        }

        .footer-column:nth-child(1) {
            flex: 1;
            min-width: 420px;
			margin-right:30px;
        }

     .footer-column:nth-child(2) {
            flex: 1;
            min-width: 350px;
        }

    .footer-column:nth-child(3) {
            flex: 1;
            width: 160px;
        }
    .footer-column:nth-child(4) {
            flex: 1;
            width: 160px;
        }

        .footer-logo {
            margin-bottom: 20px;
        }

        .footer-logo img {
            height: 50px;
        }

        .footer-title {
            font-size: 18px;
            margin-bottom: 20px;
            padding-bottom: 10px;
            position: relative;
        }

        .footer-title::after {
            content: '';
            position: absolute;
            left: 0;
            bottom: 0;
            width: 40px;
            height: 2px;
            background: #ffffff;
        }

        .footer-desc {
            color: #ddd;
            line-height: 1.8;
            font-size: 14px;
            margin-bottom: 20px;
        }

        .footer-contact {
            margin-bottom: 20px;
        }

        .contact-item {
	display: flex;
	align-items: flex-start;
	margin-bottom: 16px;
	font-size: 14px;

        }
		
		
		        .contact-item h2 {
	font-size: 16px;
	font-weight: 600;	
        }
		
		    .contact-item h3 {
	font-size: 16px;
	font-weight: 600;
	margin-top:35px;
	padding-top:20px;	
	
        }
		

        .contact-item i {
	margin-right: 10px;
	margin-top: 4px;
	color: #FFFFFF;
	width: 18px;
	text-align: center;
        }

        .contact-item span {
            color: #ddd;
        }

        .footer-links {
            display: grid;
            grid-template-columns: repeat(auto-fill, minmax(120px, 1fr));
            gap: 10px;
        }

        .footer-link {
            color: #ddd;
            font-size: 14px;
            transition: color 0.3s ease;
        }

        .footer-link:hover {
            color: #0f6ab4;
        }

        .social-links {
            display: flex;
            gap: 10px;
            margin-top: 20px;
        }

        .social-link {
            display: flex;
            align-items: center;
            justify-content: center;
            width: 36px;
            height: 36px;
            border-radius: 50%;
            background: #333;
            color: white;
            transition: all 0.3s ease;
        }

        .social-link:hover {
            background: #0f6ab4;
            transform: translateY(-3px);
        }

        .qr-container {
            display: flex;
            gap: 20px;
            margin-top: 20px;
        }

        .qr-item {
            text-align: center;
        }

        .qr-img {
            width: 100px;
            height: 100px;
            background: white;
            padding: 5px;
            margin-bottom: 10px;
        }

        .qr-text {
            font-size: 14px;
            color: #ddd;
        }

        .footer-bottom {
            padding-top: 30px;
            text-align: center;
        }

        .copyright {
            font-size: 14px;
            color: #aaa;
            margin-bottom: 15px;
        }

        .bottom-links {
            display: flex;
            justify-content: center;
            flex-wrap: wrap;
            gap: 15px 20px;
        }

        .bottom-link {
            font-size: 14px;
            color: #aaa;
            transition: color 0.3s ease;
        }

        .bottom-link:hover {
            color: #0f6ab4;
        }

        /* 动画 */
        @keyframes fadeIn {
            from { opacity: 0; transform: translateY(10px); }
            to { opacity: 1; transform: translateY(0); }
        }

        /* 响应式设计 */
        @media (max-width: 992px) {
            .product-dropdown {
                min-width: 600px;
            }
            
            .product-grid {
                grid-template-columns: 30% 30% 40%; /* 保持响应式下的列宽比例 */
            }
        }

        @media (max-width: 768px) {
            /* 隐藏桌面端导航，显示移动端导航 */
			
			
			 .mobile-search-container {
            position: fixed;
            top: 60px;
            left: 0;
            right: 0;
            background: #fff;
            padding: 15px;
            box-shadow: 0 2px 10px rgba(0,0,0,0.1);
            z-index: 998;
            transform: translateY(-100%);
            transition: transform 0.3s ease;
        }
            .desktop-header {
                display: none;
            }
            
			   .sou {
                display: none;
            }
			
			
            .mobile-header {
                display: block;
            }
            
            .banner {
                margin-top: 60px;
            }
            
            .banner-img {
                height: 200px;
            }
            
            /* 主内容区调整 */
            .content-wrapper {
                flex-direction: column;
                gap: 20px;
            }
            
            .product-sidebar {
                width: 100%;
            }
            
            .product-grid {
                grid-template-columns: 1fr;
            }
            
            .product-img {
                height: 180px;
            }
            
            /* 页脚调整 */
            .footer {
                padding: 30px 0 20px;
            }
            
            .footer-top {
                flex-direction: column;
                gap: 25px;
                padding-bottom: 20px;
            }
            
            .footer-column {
                min-width: 100%;
            }
            
            .footer-links {
                grid-template-columns: repeat(2, 1fr);
            }
            
            .qr-container {
                flex-direction: column;
                align-items: center;
            }
            
            /* 工具按钮调整 */
            .fixed-tools {
                bottom: 20px;
                right: 20px;
            }
            
            .tool-btn {
                width: 40px;
                height: 40px;
                font-size: 18px;
            }
            
            .wechat-popup {
                width: 130px;
            }
			
			 .contact-item h3 {
	font-size: 16px;
	font-weight: 600;
	margin-top:0px;
	padding-top:0px;	
	
        }
		

       .footer-column:nth-child(1) {
            flex: 1;
            width: 100%;
			
        }

		
		
			
        }

    /* ========== 全局样式重置 ========== */

    /* ========== 顶部横幅轮播（首图视频） ========== */
    #top-banner {
      position: relative;
      width: 100%;
      height: 800px; /* 横幅高度 */
      overflow: hidden;
	  

    }
    #top-banner video,
    #top-banner img {
      position: absolute;
      top: 0;
      left: 0;
      width: 100%;
      height: 100%;
      object-fit: cover;
      opacity: 0;
      transition: opacity 1s ease-in-out;
    }
    #top-banner video.active,
    #top-banner img.active {
      opacity: 1;
      z-index: 1;
    }
    
    /* 横幅文字广告语 */
    .banner-text {
      position: absolute;
      top: 50%;
      left: 50%;
      transform: translate(-50%, -50%);
      text-align: center;
      color: white;
      z-index: 5;
      width: 80%;
      max-width: 800px;
    }
    .banner-text h1 {
      font-size: 42px;
      margin-bottom: 15px;
      text-shadow: 0 2px 4px rgba(0,0,0,0.5);
      opacity: 0;
      transform: translateY(20px);
      transition: opacity 0.8s ease, transform 0.8s ease;
    }
    .banner-text p {
	font-size: 36px;
	text-shadow: 0 2px 4px rgba(0,0,0,0.5);
	opacity: 0;
	transform: translateY(20px);
	transition: opacity 0.8s ease 0.3s, transform 0.8s ease 0.3s;
    }
    .banner-text.active h1,
    .banner-text.active p {
      opacity: 1;
      transform: translateY(0);
    }
    
    /* 横幅控制按钮 */
    .banner-controls {
      position: absolute;
      bottom: 20px;
      left: 0;
      right: 0;
      display: flex;
      justify-content: center;
      gap: 10px;
      z-index: 10;
    }
    .banner-dot {
      width: 12px;
      height: 12px;
      border-radius: 50%;
      background-color: rgba(255, 255, 255, 0.5);
      cursor: pointer;
      transition: all 0.3s;
    }
    .banner-dot.active {
      background-color: white;
      transform: scale(1.3);
    }
    
    /* 横幅左右箭头 */
    .banner-arrows {
      position: absolute;
      top: 50%;
      left: 0;
      right: 0;
      transform: translateY(-50%);
      display: flex;
      justify-content: space-between;
      padding: 0 20px;
      z-index: 10;
    }
    .banner-arrow {
      width: 50px;
      height: 50px;
      border-radius: 50%;
      background-color: rgba(0, 0, 0, 0.3);
      color: white;
      border: none;
      display: flex;
      align-items: center;
      justify-content: center;
      cursor: pointer;
      transition: all 0.3s;
      font-size: 20px;
    }
    .banner-arrow:hover {
      background-color: rgba(0, 0, 0, 0.6);
      transform: scale(1.1);
    }

    /* ========== 页面标题 ========== */
    .page-title {
      text-align: center;
      margin: 50px 0 20px;
    }
    .page-title h2 {
      font-size: 32px;
      font-weight: 600;
      position: relative;
      display: inline-block;
    }
    .page-title h2::after {
      content: "";
      position: absolute;
      left: 50%;
      bottom: -8px;
      width: 40px;
      height: 2px;
      background-color: #000;
      transform: translateX(-50%);
    }
    .page-desc {
      text-align: center;
      color: #666;
      font-size: 14px;
      margin-bottom: 40px;
    }

    /* ========== TAB 导航 ========== */
    .nav-tabs {
	display: flex;
	justify-content: center;
	border-bottom: 1px solid #eee;
	margin-bottom: 15px;
	flex-wrap: wrap;
    }
    .nav-tabs li {
	margin: 0 20px;
	padding: 10px 0;
	cursor: pointer;
	color: #333;
	transition: all 0.3s;
	position: relative;
	font-size: 18px;
    }
    .nav-tabs li.active {
      color: #007bff;
    }
    .nav-tabs li.active::after {
      content: "";
      position: absolute;
      left: 0;
      bottom: -1px;
      width: 100%;
      height: 2px;
      background-color: #007bff;
    }
    .nav-tabs li:hover {
	color: #025e9f;
    }

    /* ========== TAB 内容 ========== */
    .tab-content {
      display: none;
    }
    .tab-content.active {
      display: block;
      animation: fadeIn 0.5s ease;
    }
    @keyframes fadeIn {
      from { opacity: 0; }
      to { opacity: 1; }
    }

    .content-row {
      display: flex;
      flex-wrap: wrap;
      align-items: center;
      gap: 40px;
    }
    .content-col-text {
      flex: 1 1 400px;
    }
    .content-col-text h3 {
	font-size: 20px;
	margin-bottom: 20px;
	color: #333;
	font-weight: 600;
    }
    .content-col-text p {
	color: #666;
	line-height: 1.6;
	margin-bottom: 16px;
	font-size: 16px;
    }
    .content-col-text ul {
      color: #666;
      line-height: 1.8;
      margin-bottom: 30px;
      padding-left: 16px;
      list-style: disc;
    }
    .btn-learn {
      display: inline-block;
      padding: 10px 24px;
      border: 1px solid #007bff;
      color: #007bff;
      border-radius: 4px;
      transition: all 0.3s;
    }
    .btn-learn:hover {
      background-color: #007bff;
      color: #fff;
    }

    /* ========== 内容图片轮播 ========== */
    .content-col-img {
      flex: 1 1 400px;
      text-align: center;
      position: relative;
      min-height: 300px;
      display: flex;
      align-items: center;
      justify-content: center;
    }
    .image-container {
      position: relative;
      width: 100%;
      max-width: 500px;
    }
    .content-col-img img {
      max-width: 100%;
      height: auto;
      border: none;
      border-radius: 4px;
      transition: opacity 0.5s ease;
    }
    .img-nav {
      position: absolute;
      top: 50%;
      width: 100%;
      display: flex;
      justify-content: space-between;
      transform: translateY(-50%);
      padding: 0 10px;
      box-sizing: border-box;
    }
    .img-nav button {
      background-color: rgba(0, 0, 0, 0.5);
      color: white;
      border: none;
      width: 40px;
      height: 40px;
      border-radius: 50%;
      display: flex;
      align-items: center;
      justify-content: center;
      cursor: pointer;
      transition: background-color 0.3s;
    }
    .img-nav button:hover {
      background-color: rgba(0, 0, 0, 0.8);
    }
    .img-dots {
      position: absolute;
      bottom: 10px;
      left: 50%;
      transform: translateX(-50%);
      display: flex;
      gap: 8px;
    }
    .img-dot {
      width: 10px;
      height: 10px;
      border-radius: 50%;
      background-color: rgba(255, 255, 255, 0.5);
      cursor: pointer;
      transition: all 0.3s;
    }
    .img-dot.active {
      background-color: white;
      transform: scale(1.2);
    }

    /* ========== 合作伙伴滚动 ========== */
    .cooperation-section {
      margin: 80px 0;
    }
    .cooperation-title {
	text-align: center;
	font-size: 32px;
	margin-bottom: 30px;
    }
    .cooperation-box {
      position: relative;
      height: 150px;
      border-bottom: 1px solid #E0DED9;
      overflow: hidden;
    }
    .cooperation {
      position: relative;
      left: 0;
      height: 100px;
      padding: 20px 0;
      display: flex;
      gap: 20px;
    }
    .cooperation li {
      flex-shrink: 0;
      width: 150px; /* 调整合作伙伴 logo 宽度 */
      text-align: center;
    }
    .cooperation li img {
      max-width: 100%;
      height: auto;
      transition: transform 0.3s;
    }
    .cooperation li img:hover {
      transform: scale(1.05);
    }
    /* 合作伙伴左右箭头 */
    .cooperation-arrows {
      position: absolute;
      top: 50%;
      left: 0;
      right: 0;
      transform: translateY(-50%);
      display: flex;
      justify-content: space-between;
      padding: 0 20px;
      z-index: 5;
    }

    .cooperation-arrow {
      width: 40px;
      height: 40px;
      border-radius: 50%;
      background-color: rgba(255, 255, 255, 0.8);
      color: #666;
      border: 1px solid #ddd;
      display: flex;
      align-items: center;
      justify-content: center;
      cursor: pointer;
      transition: all 0.3s;
      font-size: 16px;
      box-shadow: 0 2px 5px rgba(0,0,0,0.1);
    }
    .cooperation-arrow:hover {
      background-color: white;
      color: #007bff;
      transform: scale(1.1);
    }
    .cooperation-arrow.disabled {
      opacity: 0.5;
      cursor: not-allowed;
      transform: none;
    }
    .cooperation-arrow.disabled:hover {
      background-color: rgba(255, 255, 255, 0.8);
      color: #666;
    }

    /* ========== 响应式适配 ========== */
    @media (max-width: 768px) {
      #top-banner {
        height: 300px;
      }
      .banner-arrow {
        width: 40px;
        height: 40px;
        font-size: 16px;
      }
      .banner-text h1 {
        font-size: 24px;
      }
      .banner-text p {
        font-size: 16px;
      }
      .nav-tabs li {
        margin: 0 10px;
        font-size: 14px;
      }
      .content-row {
        gap: 20px;
      }
      .cooperation li {
        width: 120px;
      }
      .cooperation-arrow {
        width: 35px;
        height: 35px;
        font-size: 14px;
      }
    }