: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: 'Segoe UI', 'Microsoft YaHei', sans-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;
            width: 100%; /* 确保容器自适应宽度 */
        }
        
        /* 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: 20px;
            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;
            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 */
        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;
        }
        
        .header-content {
            position: relative;
            z-index: 2;
            display: flex;
            justify-content: space-between;
            align-items: center;
            width: 100%;
        }
        
        .logo {
            display: flex;
            align-items: center;
        }
        
        .logo img {
            height: 100px;
            margin-right: 15px;
        }
        
        .logo-text {
            font-size: 38px;
            font-weight: 700;
            color: var(--primary-color);
        }
        
        /* 右侧工具栏 */
        .header-right {
            display: flex;
            align-items: center;
            gap: 60px;
        }
        
        /* 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%);
        }
        
        /* 新闻分类筛选样式 - 关键修改：实现筛选按钮居中 */
        .news-filter {
            padding: 40px 0;
            background-color: var(--light-bg);
            border-radius: 8px;
            margin: 30px 0;
            text-align: center; /* 标题居中 */
        }
        
        .filter-title {
            font-size: 24px;
            color: var(--secondary-color);
            margin-bottom: 20px;
            padding-left: 10px;
            border-left: 4px solid var(--primary-color);
            display: inline-block; /* 标题居左但整体容器居中 */
        }
        
        .filter-buttons {
            display: flex;
            flex-wrap: wrap;
            gap: 15px;
            margin-bottom: 30px;
            justify-content: center; /* 核心：筛选按钮水平居中 */
            padding: 0 10px; /* 防止移动端按钮贴边 */
        }
        
        .filter-btn {
            padding: 10px 25px;
            background-color: #fff;
            border: 1px solid var(--border-color);
            border-radius: 25px;
            color: var(--text-color);
            cursor: pointer;
            transition: var(--transition);
            font-size: 16px;
            white-space: nowrap; /* 防止按钮文字换行 */
        }
        
        .filter-btn.active {
            background-color: var(--primary-color);
            color: #fff;
            border-color: var(--primary-color);
            box-shadow: 0 3px 10px rgba(30, 136, 229, 0.3);
        }
        
        .filter-btn:hover:not(.active) {
            border-color: var(--primary-color);
            color: var(--primary-color);
        }
        
        /* 新闻列表样式 */
        .news-list-section {
            padding: 60px 0;
            width: 70%; 
			/* 确保新闻列表自适应宽度 */
        }
        
        .title-container {
            display: flex;
            justify-content: center;
            align-items: baseline;
            margin-bottom: 40px;
            flex-wrap: wrap; /* 移动端标题换行 */
            gap: 10px; /* 换行后间距 */
        }
        
        .section-title {
            font-size: 36px;
            color: var(--secondary-color);
            margin: 0;
        }
        
        .section-title a {
           /* background-color: aliceblue;
            clip-path: polygon(25% 0%, 100% 0%, 75% 100%, 0% 100%); */
            padding: 10px 80px;
            white-space: nowrap; /* 防止链接文字换行 */
        }
        
        .section-eng-title {
            font-size: 24px;
            color: #666;
            font-weight: normal;
            font-style: italic;
        }
        
        /* 新闻布局：左侧列表，右侧热门新闻 */
        .news-layout {
            display: flex;
            gap: 40px;
            width: 100%;
            flex-wrap: wrap; /* 移动端自动换行 */
        }
        
        .news-list-main {
            flex: 3;
            min-width: 300px; /* 移动端最小宽度，保证显示效果 */
        }
        
        .news-sidebar {
            flex: 1;
            background-color: var(--light-bg);
            padding: 25px;
            border-radius: 10px;
            align-self: flex-start;
            box-shadow: 0 5px 15px rgba(0,0,0,0.05);
            min-width: 280px; /* 移动端侧边栏最小宽度 */
        }
        
        .news-item {
            display: flex;
            gap: 25px;
            padding: 25px 0;
            border-bottom: 1px solid var(--border-color);
            transition: var(--transition);
            width: 100%;
            flex-wrap: wrap; /* 移动端新闻项内部换行 */
        }
        
        .news-item:last-child {
            border-bottom: none;
        }
        
        .news-item:hover {
            transform: translateY(-5px);
        }
        
        .news-item-img {
            width: 220px;
            height: 150px;
            border-radius: 8px;
            overflow: hidden;
            flex-shrink: 0;
            min-width: 220px; /* 保证图片容器最小宽度 */
        }
        
        .news-item-img img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: var(--transition);
        }
        
        .news-item:hover .news-item-img img {
            transform: scale(1.05);
        }
        
        .news-item-content {
            flex: 1;
            min-width: 250px; /* 内容区最小宽度，防止挤压 */
        }
        
        .news-item-category {
            display: inline-block;
            padding: 4px 12px;
            /* background-color: var(--primary-color); */
            /* color: #fff; */
            font-size: 12px;
            /* border-radius: 12px; */
            margin-bottom: 10px;
        }
        
        .news-item-title {
            font-size: 22px;
            color: var(--secondary-color);
            margin-bottom: 12px;
            line-height: 1.4;
        }
        
        .news-item-desc {
            color: #666;
            margin-bottom: 15px;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
            line-height: 1.6;
        }
        
        .news-item-meta {
            display: flex;
            gap: 20px;
            font-size: 14px;
            color: #999;
            flex-wrap: wrap; /* 移动端元信息换行 */
        }
        
        .news-item-meta span {
            display: flex;
            align-items: center;
            gap: 5px;
        }
        
        .news-item-btn {
            display: inline-block;
            margin-top: 15px;
            color: var(--primary-color);
            text-decoration: none;
            font-size: 14px;
            transition: var(--transition);
        }
        
        .news-item-btn:hover {
            color: var(--secondary-color);
            text-decoration: underline;
        }
        
        /* 右侧热门新闻 */
        .hot-news-title {
            font-size: 20px;
            color: var(--secondary-color);
            margin-bottom: 20px;
            padding-bottom: 10px;
            border-bottom: 2px solid var(--primary-color);
        }
        
        .hot-news-list {
            list-style: none;
        }
        
        .hot-news-item {
            padding: 12px 0;
            border-bottom: 1px dashed var(--border-color);
        }
        
        .hot-news-item:last-child {
            border-bottom: none;
        }
        
        .hot-news-item a {
            color: var(--text-color);
            text-decoration: none;
            transition: var(--transition);
            display: -webkit-box;
            -webkit-line-clamp: 1;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }
        
        .hot-news-item a:hover {
            color: var(--primary-color);
            padding-left: 5px;
        }
        
        .hot-news-meta {
            font-size: 12px;
            color: #999;
            margin-top: 5px;
        }
        
        /* 分页样式 */
        .pagination {
            display: flex;
            justify-content: center;
            align-items: center;
            gap: 10px;
            margin-top: 60px;
            flex-wrap: wrap; /* 移动端分页按钮换行 */
            padding: 0 10px;
        }
        
        .page-btn {
            padding: 20px 28px;
            background-color: #fff;
            border: 1px solid var(--border-color);
            border-radius: 6px;
            color: var(--text-color);
            cursor: pointer;
            transition: var(--transition);
            white-space: nowrap;
            width: 100%;
            height: 50px;
        }
        
        .page-btn.active {
            background-color: var(--primary-color);
            color: #fff;
            border-color: var(--primary-color);
        }
        
        .page-btn:hover:not(.active) {
            border-color: var(--primary-color);
            color: var(--primary-color);
        }
        
        .page-btn:disabled {
            opacity: 0.5;
            cursor: not-allowed;
            border-color: var(--border-color);
            color: #999;
        }
        
        /* 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;
        }
        
        /* 面包屑导航 */
        .breadcrumb {
            padding: 20px 0;
            font-size: 14px;
            color: #666;
            width: 100%;
        }
        
        .breadcrumb a {
            color: var(--primary-color);
            text-decoration: none;
        }
        
        .breadcrumb a:hover {
            text-decoration: underline;
        }
        
        .breadcrumb span {
            margin: 0 8px;
            color: #999;
        }
        
        /* Footer */
        footer {
            background-color: var(--dark-bg);
            color: white;
            padding: 60px 0 20px;
            width: 100%;
        }
        
        .footer-content {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr;
            gap: 40px;
            margin-bottom: 40px;
            width: 100%;
        }
        
        .footer-info h3 {
            font-size: 24px;
            margin-bottom: 20px;
            color: var(--accent-color);
        }
        
        .footer-contact {
            display: flex;
            align-items: center;
            margin-bottom: 10px;
            flex-wrap: wrap; /* 移动端联系信息换行 */
            gap: 5px;
        }
        
        .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;
            width: 100%;
        }
        
        /* 响应式设计 - 强化自适应效果 */
        @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;
                text-align: center; /* 移动端logo文字居中 */
            }
            
            .news-layout {
                flex-direction: column; /* 移动端新闻布局纵向排列 */
                gap: 30px;
            }
            
            .news-item {
                gap: 15px;
            }
            
            .news-item-img {
                width: 180px;
                height: 120px;
                min-width: 180px;
            }
            
            .title-container {
                flex-direction: column;
                align-items: flex-start;
                gap: 5px;
            }
            
            .section-eng-title {
                font-size: 20px;
            }
            
            .footer-content {
                grid-template-columns: 2fr 1fr; /* 平板端footer两列布局 */
            }
        }
        
        @media (max-width: 768px) {
            .header-top {
                padding: 10px 0;
                flex-wrap: wrap; /* 移动端头部内容换行 */
                justify-content: center;
                gap: 15px;
            }
            
            .logo {
                justify-content: center; /* 移动端logo居中 */
                width: 100%;
            }
            
            .logo-text {
                font-size: 30px;
                text-align: center;
            }
            
            .theme-btn {
                width: 30px;
                height: 30px;
            }
            
            .header-right {
                gap: 10px;
                justify-content: center; /* 移动端头部右侧内容居中 */
                width: 100%;
            }
            
            .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;
                text-align: left;
            }
            
            .news-list-section {
                padding: 40px 0;
            }
            
            .section-divider {
                margin: 40px 0;
            }
            
            .filter-buttons {
                gap: 10px;
            }
            
            .filter-btn {
                padding: 8px 15px;
                font-size: 14px;
            }
            
            .news-item {
                flex-direction: column; /* 移动端新闻项图片和内容纵向排列 */
                gap: 10px;
            }
            
            .news-item-img {
                width: 100%;
                height: 200px;
                min-width: unset; /* 移动端图片宽度100% */
            }
            
            .footer-content {
                grid-template-columns: 1fr; /* 移动端footer单列布局 */
                gap: 30px;
            }
            
            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;
            }
            
            .section-title a {
                padding: 10px 40px; /* 移动端标题链接内边距缩小 */
            }
        }
        
        @media (max-width: 480px) {
            .logo-text {
                font-size: 20px;
            }
            
            .section-title {
                font-size: 28px;
            }
            
            .news-item-title {
                font-size: 18px;
            }
            
            .page-btn {
                padding: 8px 12px;
                font-size: 12px;
            }
            
            .news-item-img {
                height: 150px;
            }
            
            .filter-title {
                font-size: 20px; /* 小屏移动端筛选标题缩小 */
            }
            
            .section-title a {
                padding: 8px 20px; /* 小屏移动端标题链接内边距进一步缩小 */
            }
        }