:root {
            /* 默认主题：浅蓝 */
            --primary-color: #1e88e5;
            --secondary-color: #0d47a1;
            --accent-color: #ff6d00;
            --text-color: #333;
            --light-bg: #f8f9fa;
            --dark-bg: #212529;
            --border-color: #e0e0e0;
            --transition: all 0.3s ease;
            
            /* 主题颜色预设 */
            --theme-lightblue-primary: #1e88e5;
            --theme-lightblue-secondary: #0d47a1;
            
            --theme-businessgreen-primary: #2e7d32;
            --theme-businessgreen-secondary: #1b5e20;
            
            --theme-elegantpurple-primary: #7b1fa2;
            --theme-elegantpurple-secondary: #4a148c;
            
            --theme-industrialred-primary: #d32f2f;
            --theme-industrialred-secondary: #b71c1c;
        }
        
        * {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
            font-family: "宋体", "SimSun", serif;
        }
        
        body {
            color: var(--text-color);
            line-height: 1.6;
            background-color: #fff;
            overflow-x: hidden;
        }
        
        .container {
            max-width: 1600px;
            margin: 0 auto;
            padding: 0 20px;
        }
        
        /* 分割线样式 */
        .section-divider {
            height: 1px;
            background: linear-gradient(to right, transparent, var(--primary-color), transparent);
            margin: 60px 0;
            border: none;
        }
        
        /* 顶部电话图标样式 */
        .header-phone {
            position: relative;
            width: 40px;
            height: 40px;
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            box-shadow: 0 4px 15px rgba(0,0,0,0.2);
            cursor: pointer;
            transition: var(--transition);
            z-index: 10;
        }
        
        .header-phone:hover {
            transform: scale(1.1);
            box-shadow: 0 6px 20px rgba(0,0,0,0.3);
        }
        
        .header-phone i {
            color: white;
            font-size: 24px;
        }
        
        .phone-tooltip {
           position: absolute;
            right: 25px;
			margin-top: 80px;
            background-color: white;
            color: var(--secondary-color);
            padding: 10px 20px;
            border-radius: 30px;
            box-shadow: 0 3px 10px rgba(0,0,0,0.2);
            font-weight: bold;
            /* display: none; */
            white-space: nowrap;
        }
        
        .header-phone:hover .phone-tooltip {
            display: block;
        }
        
        @media (max-width: 768px) {
            .header-phone {
                width: 50px;
                height: 50px;
            }
            
            .header-phone i {
                font-size: 20px;
            }
        }
        
        /* 头部样式 - 滚动隐藏/悬停显示逻辑 */
        header {
            background-color: #fff;
            box-shadow: 0 2px 15px rgba(0,0,0,0.1);
            position: sticky;
            top: 0;
            z-index: 1000;
            width: 100%;
            transition: transform 0.3s ease, opacity 0.3s ease;
        }
        
        /* 桌面端滚动隐藏导航栏 */
        @media (min-width: 769px) {
            header.hidden {
                transform: translateY(-100%);
                opacity: 0;
            }
            header:hover {
                transform: translateY(0);
                opacity: 1;
            }
        }
        
        /* 移动端导航栏始终显示 */
        @media (max-width: 768px) {
            header {
                transform: translateY(0) !important;
                opacity: 1 !important;
            }
        }
        
        .header-top {
            display: flex;
            justify-content: space-between;
            align-items: center;
            padding: 15px 0;
            position: relative;
        }
        
        .header-bg888 img {
            position: absolute;
            height: 100px;
            top: 0;
            margin-left: 37%;
            opacity: 0.4;
            z-index: 1;
        }
        
        /* 调整header-content：将logo居中，右侧工具栏固定靠右 */
        .header-content {
            position: relative;
            z-index: 2;
            display: flex;
            /* 移除原有justify-content: space-between; 改为居中 */
            justify-content: center;
            align-items: center;
            width: 100%;
			padding-top: 30px;
        }
        
        /* 将logo设置为居中容器（可选，增强稳定性） */
        .logo {
            display: flex;
            align-items: center;
            justify-content: center; /* 确保logo内部元素水平居中 */
            /* 固定logo位置，避免被右侧元素影响 */
            position: absolute;
            left: 50%;
            transform: translateX(-50%);
        }
        
        .logo img {
            height: 100px;
            margin-right: 15px;
        }
        
        .logo-text {
            font-size: 38px;
            font-weight: 700;
            color: var(--primary-color);
        }
        
      /* 右侧工具栏保持靠右布局 */
      .header-right {
          display: flex;
          align-items: center;
          gap: 60px;
          position: absolute; /* 绝对定位靠右 */
          right: 0;
      }
        
		
/* 桌面端媒体查询（确保仅PC端生效） */
@media (min-width: 769px) {
    /* 上述样式已针对PC端生效，无需额外修改 */
}

/* 移动端恢复原有布局（避免冲突） */
@media (max-width: 768px) {
    .header-content {
        justify-content: space-between; /* 移动端恢复左右分布 */
    }
    .logo {
        position: static; /* 移除移动端绝对定位 */
        transform: none;
    }
    .header-right {
        position: static; /* 移除移动端绝对定位 */
    }
}		
        /* 主题切换按钮样式 */
        .theme-switcher {
            display: flex;
            gap: 7px;
        }
        
        .theme-btn {
            width: 26px;
            height: 26px;
            border-radius: 50%;
            border: 2px solid #e0e0e0;
            cursor: pointer;
            transition: var(--transition);
            opacity: 0.7;
        }
        
        .theme-btn:hover {
            transform: scale(1.1);
            opacity: 1;
        }
        
        .theme-btn.active {
            border-color: var(--primary-color);
            opacity: 1;
            box-shadow: 0 0 0 2px rgba(30, 136, 229, 0.3);
        }
        
        .theme-lightblue {
            background-color: var(--theme-lightblue-primary);
        }
        
        .theme-businessgreen {
            background-color: var(--theme-businessgreen-primary);
        }
        
        .theme-elegantpurple {
            background-color: var(--theme-elegantpurple-primary);
        }
        
        .theme-industrialred {
            background-color: var(--theme-industrialred-primary);
        }
        
        /* 分割线 */
        .fengexian {
            height: 2px;
            background: linear-gradient(to right, transparent, var(--primary-color), transparent);
            border: none;
        }
        
        /* 导航菜单样式 */
        .nav-toggle {
            display: none;
            background: none;
            border: none;
            color: var(--dark-bg);
            font-size: 24px;
            cursor: pointer;
        }
        
        .nav-menu {
            display: flex;
            justify-content: center;
            list-style: none;
            padding: 0;
            padding-top: 30px;
            position: relative;
            z-index: 2;
            width: 100%;
            margin: 0;
        }
        
        .nav-menu li {
            position: relative;
        }
        
        .nav-menu li a {
            display: block;
            color: black;
            text-align: center;
            padding: 18px 30px;
            text-decoration: none;
            font-size: 18px;
            transition: var(--transition);
        }
        
        .nav-menu li a:hover {
            background-color: var(--primary-color);
            color: white;
        }
        
        .nav-menu li a.active {
            background-color: var(--secondary-color);
            color: white;
            clip-path: polygon(25% 0%, 100% 0%, 75% 100%, 0% 100%);
        }
        
        /* 产品分类筛选样式 */
        .product-filter {
            padding: 40px 0;
            background-color: var(--light-bg);
        }
        
        .filter-container {
            display: flex;
            justify-content: space-between;
            align-items: center;
            flex-wrap: wrap;
            gap: 20px;
        }
        
        .filter-title {
            font-size: 20px;
            color: var(--secondary-color);
            font-weight: bold;
        }
        
        .filter-buttons {
            display: flex;
            gap: 15px;
            flex-wrap: wrap;
        }
        
        .filter-btn {
            padding: 8px 20px;
            background-color: #fff;
            border: 1px solid var(--border-color);
            border-radius: 20px;
            color: var(--text-color);
            cursor: pointer;
            transition: var(--transition);
        }
        
        .filter-btn.active {
            background-color: var(--primary-color);
            color: #fff;
            border-color: var(--primary-color);
        }
        
        .filter-btn:hover {
            background-color: var(--primary-color);
            color: #fff;
            border-color: var(--primary-color);
        }
        
        .search-box {
            display: flex;
            align-items: center;
            background-color: #fff;
            border: 1px solid var(--border-color);
            border-radius: 20px;
            padding: 8px 15px;
        }
        
        .search-box input {
            border: none;
            outline: none;
            padding: 5px;
            flex: 1;
            font-size: 14px;
        }
        
        .search-box button {
            background: none;
            border: none;
            color: var(--primary-color);
            cursor: pointer;
            font-size: 16px;
        }
        
        /* 产品列表样式 */
        .product-list-section {
            padding: 60px 0;
        }
        
        .section-title-wrap {
           /* text-align: center;
            margin-bottom: 50px; */
			
			/* 上面的样式是垂直排列 */
			display: flex;
			/* justify-content: space-between; */
			justify-content: center;
			align-items: baseline;
			margin-bottom: 20px;
			/* 上面的样式是水平排列 */
        }
        
        .section-main-title {
            font-size: 36px;
            color: var(--secondary-color);
            margin-bottom: 10px;
        }
        
        .section-sub-title {
            font-size: 18px;
            color: #666;
            font-style: italic;
        }
        
        .product-list-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 30px;
        }
        
        .product-list-card {
            background: white;
            border-radius: 10px;
            overflow: hidden;
            box-shadow: 0 5px 15px rgba(0,0,0,0.1);
            transition: var(--transition);
        }
        
        .product-list-card.hidden {
            display: none;
        }
        
        .product-list-card:hover {
            transform: translateY(-10px);
            box-shadow: 0 15px 30px rgba(0,0,0,0.15);
        }
        
        .product-list-img {
            /*height: 220px;*/
                          /*此处的高度和下面img的高度会使图片产生水波纹，避免用这个高度*/
            background-color: #f5f5f5;
            display: flex;
            align-items: center;
            justify-content: center;
            overflow: hidden;
        }
        
        .product-list-img img {
            width: 100%;
            height: 100%;
            object-fit: cover;
        }
        
        .product-list-info {
            padding: 20px;
        }
        
        .product-list-info h3 {
            font-size: 20px;
            margin-bottom: 10px;
            color: var(--secondary-color);
        }
        
        .product-list-info p {
            color: #666;
            margin-bottom: 15px;
            height: 60px;
            overflow: hidden;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
        }
        
        .product-list-specs {
            display: flex;
            justify-content: space-between;
            font-size: 14px;
            color: #777;
            margin-bottom: 15px;
        }
        
        .product-list-btn {
            display: inline-block;
            background-color: var(--primary-color);
            color: white;
            padding: 8px 20px;
            border-radius: 20px;
            text-decoration: none;
            font-size: 14px;
            transition: var(--transition);
        }
        
        .product-list-btn:hover {
            background-color: var(--secondary-color);
            transform: translateY(-2px);
        }
        
        /* 分页样式 */
        .pagination {
            display: flex;
            justify-content: center;
            align-items: center;
            margin-top: 60px;
            gap: 10px;
        }
        
        .page-btn {
            padding: 8px 15px;
            background-color: #fff;
            border: 1px solid var(--border-color);
            border-radius: 5px;
            color: var(--text-color);
            cursor: pointer;
            transition: var(--transition);
        }
        
        .page-btn:hover {
            background-color: var(--primary-color);
            color: #fff;
            border-color: var(--primary-color);
        }
        
        .page-btn.active {
            background-color: var(--primary-color);
            color: #fff;
            border-color: var(--primary-color);
        }
        
        .page-btn.disabled {
            opacity: 0.5;
            cursor: not-allowed;
        }
        
        .page-btn.disabled:hover {
            background-color: #fff;
            color: var(--text-color);
            border-color: var(--border-color);
        }
        
        /* 侧边栏样式 */
        .sidebar-wrapper {
            position: fixed;
            right: 0;
            top: 50%;
            transform: translateY(-50%);
            z-index: 999;
            display: flex;
            flex-direction: column;
            align-items: flex-end;
            padding-right: 5px;
        }
        
        .sidebar-item {
            position: relative;
            width: 56px;
            height: 56px;
            background-color: var(--secondary-color);
            color: #ffffff;
            box-shadow: 0 2px 8px rgba(0, 0, 0, 0.15);
            border-radius: 8px 0 0 8px;
            margin-bottom: 8px;
            cursor: pointer;
            display: flex;
            align-items: center;
            justify-content: center;
            transition: all 0.3s ease;
        }
        
        .sidebar-item:hover {
            background-color: #2d8cf0;
        }
        
        .sidebar-icon {
            width: 24px;
            height: 24px;
            display: block;
            background-size: 100% 100%;
            transition: all 0.3s ease;
        }
        
        .sidebar-item:hover .sidebar-icon {
            filter: brightness(0) invert(1);
        }
        
        .sidebar-content {
            position: absolute;
            right: 56px;
            top: 0;
            height: 100%;
            background-color: #ffffff;
            box-shadow: 0 2px 8px rgba(0, 0, 0, 0.15);
            border-radius: 8px 0 0 8px;
            padding: 0 15px;
            display: flex;
            align-items: center;
            opacity: 0;
            visibility: hidden;
            transform: translateX(10px);
            transition: all 0.3s ease;
            z-index: -1;
        }
        
        .sidebar-item:hover .sidebar-content {
            opacity: 1;
            visibility: visible;
            transform: translateX(0);
        }
        
        .qrcode-container {
            padding: 10px;
            background-color: #fff;
        }
        
        .qrcode-img {
            width: 120px;
            height: 120px;
            display: block;
        }
        
        .qrcode-tip {
            text-align: center;
            font-size: 12px;
            color: #666;
            margin-top: 5px;
        }
        
        .contact-text {
            color: #333;
            font-size: 14px;
            white-space: nowrap;
        }
        
        /* Footer */
        footer {
			  width: 100vw;
			    margin-left: calc(-50vw + 50%);
            background-color: var(--dark-bg);
            color: white;
            padding: 60px 0 20px;
        }
        
        .footer-content {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr;
            gap: 40px;
            margin-bottom: 40px;
        }
        
        .footer-info h3 {
            font-size: 24px;
            margin-bottom: 20px;
            color: var(--accent-color);
        }
        
        .footer-contact {
            display: flex;
            align-items: center;
            margin-bottom: 10px;
        }
        
        .footer-contact i {
            margin-right: 10px;
            color: var(--accent-color);
        }
        
        .qrcode {
            text-align: center;
        }
        
        .qrcode img {
            width: 150px;
            margin-bottom: 15px;
        }
        
        .copyright {
            text-align: center;
            padding-top: 20px;
            border-top: 1px solid var(--secondary-color);
            font-size: 14px;
            color: #aaa;
        }
        
        /* 响应式设计 */
        @media (min-width:1080px) {
            .logo-text {
                display: none;
            }
            
            .nav-menu li a:hover {
                background-color: var(--primary-color);
                clip-path: polygon(25% 0%, 100% 0%, 75% 100%, 0% 100%);
                color: white;
            }
        }
        
        @media (max-width: 1024px) {
            .logo img  {
                display: none;
            }
            
            .header-bg888 img {
                display: none;
            }
            
            .header-bg {
                display: none;
            }
            
            .logo-text  {
                font-size: 40px;
            }
            
            .product-list-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            
            .filter-container {
                flex-direction: column;
                align-items: flex-start;
            }
            
            .nav-menu {
                background-color:black;
            }
            
            .nav-menu li a {
                padding: 15px 20px;
                font-size: 16px;
                color: white;
            }
            
            .nav-menu li a:hover {
                color: white;
            }
            
            .title-container {
                flex-direction: column;
                align-items: flex-start;
                gap: 5px;
            }
            
            .section-eng-title {
                font-size: 20px;
            }
        }
        
        @media (max-width: 768px) {
            .header-top {
                padding: 10px 0;
            }
            
            .logo-text {
                font-size: 30px;
            }
            
            .theme-btn {
                width: 30px;
                height: 30px;
            }
            
            .header-right {
                gap: 10px;
            }
            
            .nav-toggle {
                display: block;
                margin-left: auto;
            }
            
            .nav-menu {
                display: none;
                flex-direction: column;
                position: absolute;
                top: 100%;
                left: 0;
                right: 0;
                z-index: 999;
                background-color: black;
            }
            
            .nav-menu.active {
                display: flex;
            }
            
            .nav-menu li a {
                padding: 12px 20px;
                font-size: 16px;
                border-bottom: 1px solid rgba(255,255,255,0.1);
                color: white;
            }
            
            .nav-menu li a:hover {
                color: white;
            }
            
            .section-title {
                font-size: 28px;
                margin-bottom: 5px;
            }
            
            .section-eng-title {
                font-size: 18px;
            }
            
            .product-list-grid {
                grid-template-columns: 1fr;
            }
            
            .footer-content {
                grid-template-columns: 1fr;
                gap: 30px;
            }
            
            .products, .about, .certificates, .solutions, .technology, .news {
                padding: 40px 0;
            }
            
            .section-divider {
                margin: 40px 0;
            }
            
            .stat-value {
                font-size: 36px;
            }
            
            footer {
                padding: 40px 0 20px;
            }
            
            .sidebar-wrapper {
                top: auto;
                bottom: 20px;
                transform: none;
            }
            
            .sidebar-item {
                width: 48px;
                height: 48px;
            }
            
            .sidebar-content {
                right: 48px;
            }
            
            .qrcode-img {
                width: 100px;
                height: 100px;
            }
        }
        
        @media (max-width: 480px) {
            .logo-text {
                font-size: 20px;
            }
            
            .btn {
                padding: 10px 20px;
                font-size: 14px;
            }
            
            .nav-menu {
                background-color:black;
            }
            
            .nav-menu li a:hover {
                color: white;
            }
            
            .product-list-info p {
                height: auto;
                -webkit-line-clamp: 3;
            }
            
            .header-phone {
                width: 45px;
                height: 45px;
            }
            
            .header-phone i {
                font-size: 18px;
            }
            
            .phone-tooltip {
                display: none !important;
            }
            
            .pagination {
                flex-wrap: wrap;
            }
            
            .page-btn {
                padding: 6px 12px;
                font-size: 12px;
            }
        }