:root {
            --primary-color: #1e88e5; /* 默认主题颜色 */
        }
        
        * {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
            font-family: "宋体", sans-serif;
        }
        
        body {
            color: #333;
            line-height: 1.6;
        }
        
        a {
            text-decoration: none;
            color: inherit;
        }
        
        ul {
            list-style: none;
        }
        
        .container {
            width: 100%;
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 15px;
        }
        
        /* 头部样式 */
        header {
            background-color: #fff;
            box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
            position: sticky;
            top: 0;
            z-index: 100;
        }
        
        .header-top {
            display: flex;
            justify-content: space-between;
            align-items: center;
            padding: 10px 0;
        }
        
        /*.logo {*/
        /*    font-size: 24px;*/
        /*    font-weight: bold;*/
        /*    color: var(--primary-color);*/
        /*}*/
        
        .theme-switcher {
            display: flex;
            align-items: center;
        }
        
        .theme-switcher span {
            margin-right: 10px;
        }
        
        .theme-option {
            width: 20px;
            height: 20px;
            border-radius: 50%;
            margin: 0 5px;
            cursor: pointer;
            border: 1px solid #ddd;
        }
        
        .theme-option.blue  { background-color: #1e88e5; }
        .theme-option.red  { background-color: #e53935; }
        .theme-option.green  { background-color: #43a047; }
        .theme-option.purple  { background-color: #8e24aa; }
        
        /* 导航栏样式 */
        /* 导航栏样式 - 已调整为全宽 */
        nav {
            background-color: var(--primary-color);
            width: 100%; /* 新增：确保导航栏宽度为100% */
        }
        
        .nav-container { /* 新增：用于容纳导航内容并居中 */
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 15px;
        }
        
        .nav-menu {
            display: flex;
            position: relative;
        }
        
        .nav-item {
            position: relative;
        }
        
        .nav-link {
            display: block;
            padding: 15px 20px;
            color: #fff;
            transition: background-color 0.3s;
        }
        
        .nav-link:hover {
            background-color: rgba(255, 255, 255, 0.1);
        }
        
        .submenu {
            position: absolute;
            top: 100%;
            left: 0;
            background-color: #fff;
            min-width: 200px;
            box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
            opacity: 0;
            visibility: hidden;
            transition: all 0.3s;
            z-index: 10;
        }
        
        .nav-item:hover .submenu {
            opacity: 1;
            visibility: visible;
        }
        
        .submenu-item {
            border-bottom: 1px solid #eee;
        }
        
        .submenu-link {
            display: block;
            padding: 10px 20px;
            color: #333;
            transition: background-color 0.3s;
        }
        
        .submenu-link:hover {
            background-color: #f5f5f5;
            color: var(--primary-color);
        }
        
        /* 移动端导航按钮 */
        .mobile-menu-btn {
            display: none;
            font-size: 24px;
            cursor: pointer;
        }
        
     
        
        /*20250728新增顶部banner轮播图*/
        
          /* Banner 轮播图 */
        .banner {
            height: 400px;
            background-color: #eee;
            position: relative;
            overflow: hidden;
            margin-bottom: 30px;
        }
        
        .banner-slide {
            position: absolute;
            width: 100%;
            height: 100%;
            background-size: cover;
            background-position: center;
            opacity: 0;
            transition: opacity 1s;
        }
        
        .banner-slide.active  {
            opacity: 1;
        }
 /* 新增：Banner文字描述样式 */

       .banner-text {
           position: absolute;
           top: 50%;
           left: 50%;
           transform: translate(-50%, -50%); /* 同时实现水平和垂直居中 */
           width: 80%; /* 限制宽度避免过宽 */
           max-width: 1000px; /* 最大宽度 */
           padding: 40px;
           /* background: linear-gradient(to right, rgba(0,0,0,0.8) 0%, rgba(0,0,0,0.4) 100%); */
		   /* 优化渐变方向 */
           color: white;
           z-index: 10;
           text-align: center; /* 文本内容居中 */
           border-radius: 8px; /* 轻微圆角 */
		   
       }
       
       .banner-title {
            font-family: "黑体", SimHei, sans-serif;
            letter-spacing: 10px;  /*文字间距*/
           font-size: 100px; /* 增大标题字体 */
           font-weight: bolder;
           margin-bottom: 15px;
           text-shadow: 2px 2px 4px rgba(0,0,0,0.5);
		   color: #E53935;
       }
       
       .banner-desc {
           font-size: 18px; /* 增大描述字体 */
           margin-bottom: 0;
           text-shadow: 1px 1px 2px rgba(0,0,0,0.5);
       }        
         
         
        /*20250728新增顶部banner轮播图 end*/
        
        
         @media (max-width: 920px) {
             
              /*banner-slide {*/
             .banner {
                height: 120px;
            }
            .banner img {
              max-width: 100%;
              height: auto !important
            }
            
              .logo {
                display: block; margin: 0 auto;
            }
            
			.banner-title {
			    font-size: 35px; /* 增大标题字体 */
			     letter-spacing: 5px; /*文字间距*/
							 }
            /*.theme-switcher {*/
            /*    display: none;*/
            /*}*/
         }
        
        
         @media (min-width: 921px) {
            
         .logo {
             display: none;
         }   
            
        }
        
        /* 面包屑导航 */
        .breadcrumb {
            padding: 15px 0;
            margin-bottom: 20px;
            border-bottom: 1px solid #eee;
        }
        
        .breadcrumb a {
            color: var(--primary-color);
        }
        
        .breadcrumb a:hover {
            text-decoration: underline;
        }
        
        /* 二级页面主要内容 */
        .page-title {
            font-size: 28px;
            color: var(--primary-color);
            margin-bottom: 20px;
            padding-bottom: 10px;
            border-bottom: 2px solid var(--primary-color);
        }
        
        .page-content {
            display: flex;
            flex-wrap: wrap;
            margin-bottom: 40px;
        }
        
        /* 侧边栏 */
        .sidebar {
            flex: 0 0 250px;
            padding-right: 20px;
        }
        
        .sidebar-title {
            font-size: 18px;
            padding: 10px 15px;
            background-color: var(--primary-color);
            color: #fff;
            margin-bottom: 10px;
        }
        
        .sidebar-menu {
            background-color: #f9f9f9;
            padding: 10px 0;
        }
        
        .sidebar-item {
            border-bottom: 1px solid #eee;
        }
        
        .sidebar-link {
            display: block;
            padding: 10px 20px;
            color: #555;
            transition: all 0.3s;
        }
        
        .sidebar-link:hover, .sidebar-link.active  {
            background-color: rgba(30, 136, 229, 0.1);
            color: var(--primary-color);
            padding-left: 25px;
        }
        
        /* 主内容区 */
        .main-content {
            flex: 1;
            min-width: 300px;
        }
        
        /* 新闻详情页样式 */
        .news-detail {
            background-color: #fff;
            padding: 30px;
            border-radius: 5px;
            box-shadow: 0 1px 5px rgba(0, 0, 0, 0.1);
        }
        
        .news-title {
            font-size: 24px;
            margin-bottom: 15px;
            color: #333;
        }
        
        .news-meta {
            font-size: 14px;
            color: #999;
            margin-bottom: 20px;
            padding-bottom: 10px;
            border-bottom: 1px solid #eee;
        }
        
        .news-meta span {
            margin-right: 20px;
        }
        
        .news-content {
            line-height: 1.8;
            margin-bottom: 30px;
        }
        
        .news-content p {
            margin-bottom: 20px;
        }
        
        .news-content img {
            max-width: 100%;
            height: auto;
            margin: 20px 0;
            border-radius: 5px;
        }
        
        /* 相关新闻 */
        .related-news {
            margin-top: 30px;
        }
        
        .related-news h3 {
            font-size: 18px;
            margin-bottom: 15px;
            padding-bottom: 10px;
            border-bottom: 1px solid #eee;
        }
        
        .related-news ul {
            list-style: none;
        }
        
        .related-news ul li {
            margin-bottom: 10px;
        }
        
        .related-news ul li a {
            color: #555;
            transition: color 0.3s;
        }
        
        .related-news ul li a:hover {
            color: var(--primary-color);
        }
        
        /* 新闻导航 */
        .news-nav {
            margin-top: 30px;
            padding-top: 20px;
            border-top: 1px solid #eee;
            display: flex;
            justify-content: space-between;
        }
        
        .prev-news, .next-news {
            max-width: 45%;
        }
        
        .prev-news i, .next-news i {
            margin: 0 5px;
        }
        
        .prev-news a, .next-news a {
            display: block;
            transition: color 0.3s;
        }
        
        .prev-news a:hover, .next-news a:hover {
            color: var(--primary-color);
        }
        
        .prev-news span, .next-news span {
            color: #999;
            font-size: 14px;
        }
        
        /* 页脚 */
        footer {
            background-color: #316fff;
            color: #fff;
            padding: 40px 0 20px;
        }
        
        .footer-content {
            display: flex;
            flex-wrap: wrap;
            justify-content: space-between;
            margin-bottom: 30px;
        }
        
        .footer-column {
            flex: 1;
            min-width: 200px;
            margin-bottom: 20px;
            padding: 0 15px;
        }
        
        .footer-title {
            font-size: 18px;
            margin-bottom: 15px;
            color: #fff;
            position: relative;
            padding-bottom: 10px;
        }
        
        .footer-title::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 0;
            width: 40px;
            height: 2px;
            background-color: var(--primary-color);
        }
        
        .footer-links li {
            margin-bottom: 10px;
        }
        
        .footer-links a {
            color: #ccc;
            transition: color 0.3s;
        }
        
        .footer-links a:hover {
            color: #fff;
        }
        
        .contact-info {
            margin-bottom: 15px;
        }
        
        .contact-info i {
            margin-right: 10px;
            color: var(--primary-color);
        }
        
        .copyright {
            text-align: center;
            padding-top: 20px;
            border-top: 1px solid #444;
            color: #aaa;
            font-size: 14px;
        }
        
        /* 响应式设计 */
        @media (max-width: 768px) {
            .mobile-menu-btn {
                display: block;
            }
            
            .nav-menu {
                display: none;
                position: absolute;
                top: 100%;
                left: 0;
                width: 100%;
                background-color: var(--primary-color);
                flex-direction: column;
            }
            
            .nav-menu.active  {
                display: flex;
            }
            
            .nav-item {
                border-bottom: 1px solid rgba(255, 255, 255, 0.1);
            }
            
            .submenu {
                position: static;
                opacity: 1;
                visibility: visible;
                display: none;
                box-shadow: none;
                background-color: rgba(0, 0, 0, 0.1);
            }
            
            .nav-item:hover .submenu {
                display: block;
            }
            
            .sidebar {
                flex: 0 0 100%;
                padding-right: 0;
                margin-bottom: 20px;
            }
            
            .news-detail {
                padding: 15px;
            }
            
            .news-title {
                font-size: 20px;
            }
            
            .news-meta {
                font-size: 12px;
            }
            
            .news-nav {
                flex-direction: column;
            }
            
            .prev-news, .next-news {
                max-width: 100%;
                margin-bottom: 15px;
            }
        }