/* 全局重置 */
        * {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
        }

        body {
            font-family: "Microsoft YaHei", "Heiti SC", sans-serif;
            background-color: #f4f4f4;
            color: #333;
            font-size: 14px;
        }

        a {
            text-decoration: none;
            color: inherit;
        }

        ul {
            list-style: none;
        }

        /* 通用容器宽度 */
        .container {
            width: 1440px;
            margin: 0 auto;
            position: relative;
        }

        /* --- Banner 图片 --- */
        .banner {
            width: 100%;
            height: 550px;
            overflow: hidden;
        }

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

        /* --- 主体内容 --- */
        .main-content {
            display: flex;
            margin-top: -88px;
            /* 让内容向上浮动一点，盖住banner底部 */
            margin-bottom: 40px;
            position: relative;
            z-index: 10;
        }

        /* 左侧侧边栏 */
        .sidebar {
            width: 260px;
            background-color: #0445B3;
            color: white;
            box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
        }

        .sidebar-header {
            background-color: #0445B3;
            /* 稍亮一点的蓝色 */
            height: 88px;
            display: flex;
            flex-direction: column;
            justify-content: center;
            align-items: center;
            font-size: 20px;
            font-weight: bold;
            background-image: url(../img/showLeft.jpg);
            background-repeat: no-repeat;
            background-size: 100% 100%;
            /* border-bottom: 1px solid #2d6bb3; */
            /* 这里如果有背景图可以加 background-image */
        }

        .sidebar-menu li {
            /* border-bottom: 1px solid #002652; */
        }

        .sidebar-menu a {
            display: block;
            padding: 15px 0;
            text-align: center;
            color: #fff;
            font-size: 16px;
            transition: background 0.3s;
        }

        /* --- 左侧侧边栏样式优化 --- */
        .sidebar {
            width: 260px;
            background-color: #0445B3;
            /* 保持你的深蓝色背景 */
            color: white;
            box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
            /* 防止高度塌陷，如果有需要 */
            padding-bottom: 20px;
        }

        .sidebar-menu {
            list-style: none;
            padding: 0;
            margin: 0;
        }

        /* 一级菜单项容器 */
        .sidebar-menu>li {
            border-bottom: 1px solid rgba(255, 255, 255, 0.1);
            /* 分割线 */
        }

        /* 所有链接和标题的通用样式 */
        .sidebar-menu a,
        .sidebar-menu .menu-title {
            display: flex;
            justify-content: space-between;
            /* 让文字在左，箭头在右 */
            align-items: center;
            padding: 15px 25px;
            /* 增加内边距 */
            color: #fff;
            text-decoration: none;
            font-size: 16px;
            transition: background 0.3s;
            cursor: pointer;
            text-align: left;
            /* 确保文字左对齐 */
        }

        /* 悬停效果 */
        .sidebar-menu a:hover,
        .sidebar-menu .menu-title:hover {
            background-color: rgba(0, 0, 0, 0.1);
            /* 微微变暗 */
        }

        /* --- 子菜单样式 (核心) --- */
        .submenu {
            display: none;
            /* 默认隐藏 */
            background-color: #033691;
            /* 比主色稍深的背景，区分层级 */
            padding: 0;
        }

        /* 子菜单链接 */
        .submenu li a {
            padding: 12px 25px 12px 45px;
            /* 左侧增加缩进，体现层级 */
            font-size: 14px;
            color: rgba(255, 255, 255, 0.8);
            border-bottom: none;
        }

        .submenu li a:hover {
            color: #fff;
            background-color: rgba(255, 255, 255, 0.05);
        }

        /* 子菜单选中状态 */
        .submenu li a.active {
            color: #fff;
            font-weight: bold;
            background-color: #022a72;
            /* 选中时的深色背景 */
            border-left: 4px solid #fff;
            /* 左侧亮条指示 */
        }

        /* --- 交互状态样式 --- */

        /* 展开状态：显示子菜单 */
        .has-child.open .submenu {
            display: block;
            /* 可选：添加简单的淡入动画 */
            animation: fadeIn 0.3s ease;
        }

        /* 箭头样式 */
        .arrow {
            font-family: monospace;
            font-weight: bold;
            font-size: 18px;
            transition: transform 0.3s ease;
            /* 旋转动画 */
        }

        /* 展开时箭头旋转 90度 */
        .has-child.open .menu-title .arrow {
            transform: rotate(90deg);
        }

        @keyframes fadeIn {
            from {
                opacity: 0;
                transform: translateY(-5px);
            }

            to {
                opacity: 1;
                transform: translateY(0);
            }
        }

        .sidebar-menu a:hover,
        .sidebar-menu a.active {
            /* background-color: #002652; */
            font-weight: bold;
        }

        /* 右侧列表内容 */
        .content-area {
            flex: 1;
            background-color: #fff;
            padding: 30px 40px;
            min-height: 600px;
        }

        .page-title {
            font-size: 20px;
            color: #0445b3;
            border-bottom: 2px solid #0445b3;
            padding-bottom: 10px;
            margin-bottom: 20px;
            display: inline-block;
        }

        .page-title-line {
            border-bottom: 1px solid #eee;
            margin-top: -22px;
            /* 调整下划线位置 */
            margin-bottom: 30px;
        }
        .list-bs {
            display: flex;
            flex-wrap: nowrap;
            align-items: center;
            justify-content: center;
        }
        .list-bs-heng {
           background: #0445b3;
           width: 84px;
           height: 5px;
        }
        .list-bs-wen{
           color: #0445b3;
           font-size: 38px;
           padding: 0 30px;
        }
        .news-list {
            display: flex;
            flex-wrap: wrap;
            gap: 10px;
            align-content: flex-start;
        }
        .news-list-banner{
            background: url(../img/20260119.png) no-repeat top right ;
        }
        .news-list li {
            width: 49%;
        }
        .bs-name {
            display: flex;
            justify-content: flex-start;
           align-items: flex-start;
           padding: 15px 0;
           font-size: 14px;
           color: #555;
           position: relative;
        }

        .bs-name:hover {
            color: #1a56a3;
            cursor: pointer;
        }
        .bs-xiangqing {
            position: absolute;
            bottom: 15%;
            right: 8%;
            padding: 10px 20px;
            color: #1a56a3;
            border: 1px solid #0445b3;
        }
        .bs-xiangqing:hover {
            color: #1a56a3;

        }
        .news-list-name{
            position: relative;
            margin: 15px 30px;
        }
        .news-list-name img{
            width: 186px;
            height: 260px;
            position: absolute;
            top: 30px;
            left: 14px;
            z-index: 1;           
        }
        .news-list-name .news-list-ys{
            width: 174px;
            height: 292px;
            background: #0445b3;
            
        }
        .news-list-xian{
            border-left: 2px solid #0445b3;
            margin-top: 60px;
        }
        .news-list-xian-p{
            white-space: nowrap;
            overflow: hidden;
            text-overflow: ellipsis;
            width: 270px;     
        }

        .news-list-xm{
            padding-left: 30px;
            font-size: 24px;
            font-weight: bold;
            color: #0445b3;
        }
        .news-list-js{
            padding-left: 30px;
            font-size: 18px;
            color: #555;
        }

        .news-list-zw {
            padding-left: 30px;
            font-size: 16px;
            color: #555;
            padding:  4px 30px;
            width: 270px;
        }
        .news-list-yj {
            padding-left: 30px;
            font-size: 16px;
            color: #B39999;
            padding: 12px 30px;
            width: 270px;
        }
        .news-list-yjfx {
            padding-left: 30px;
            font-size: 16px;
            color: #B39999;
            padding: 12px 30px;
            width: 270px;
        }
        .news-list-yjfx span{
            font-weight: bold;
        }
        .news-list-zhize{
            padding-left: 30px;
            font-size: 16px;
            color: #B39999;
            padding: 12px 30px;
            width: 270px;
        }
        .news-list-zhize span{
            font-weight: bold;
        }
        .news-date {
            color: #999;
        }

        /* 分页 */
        .pagination {
            display: flex;
            justify-content: center;
            align-items: center;
            margin-top: 40px;
            gap: 10px;
            color: #666;
        }

        .pagination span,
        .pagination a {
            padding: 5px 10px;
            cursor: pointer;
        }

        .pagination .active {
            background-color: #003366;
            color: white;
            border-radius: 50%;
            width: 30px;
            height: 30px;
            display: flex;
            align-items: center;
            justify-content: center;
            padding: 0;
        }

        .jump-btn {
            background-color: #003366;
            color: white;
            border: none;
            padding: 5px 10px;
            border-radius: 3px;
        }

        .page-input {
            width: 40px;
            text-align: center;
            margin: 0 5px;
            border: 1px solid #ddd;
        }

        /* --- 底部 Footer --- */
        .footer-top {
            background-color: #1a56a3;
            color: white;
            padding: 15px 0;
            text-align: center;
        }

        .footer-top a {
            margin: 0 15px;
            font-size: 14px;
        }

        .footer-middle {
            background-color: #2163b8;
            /* 主蓝色 */
            color: white;
            padding: 20px 0;
            text-align: center;
        }

        .footer-logo-area {
            display: flex;
            justify-content: center;
            align-items: center;
            gap: 30px;
        }

        .slogan {
            font-family: "KaiTi", serif;
            /* 楷体模拟书法字 */
            font-size: 24px;
            letter-spacing: 3px;
        }

        .footer-bottom {
            background-color: #0e3d82;
            /* 深蓝 */
            color: #ccc;
            padding: 20px 0;
            text-align: center;
            font-size: 12px;
            line-height: 1.6;
        }

        :root {
            --primary-blue: #1b3d86;
            /* 深蓝 */
            --light-blue: #2c5bb5;
            --accent-blue: #0056b3;
            --text-grey: #666;
            --white: #fff;
        }

        /* --- 回到顶部按钮样式 --- */
        .back-to-top.show {
            opacity: 1;
            visibility: visible;
            transform: translateY(0);
        }

        .back-to-top:hover {
            background-color: #357abd;
        }

        .back-to-top svg {
            width: 24px;
            height: 24px;
            stroke: currentColor;
            stroke-width: 2.5;
            stroke-linecap: round;
            stroke-linejoin: round;
            fill: none;
        }


        .top-bar {
            font-family: MicrosoftYaHei;
            font-size: 16px;
            color: #FFFFFF;
            position: relative;

        }

        .top-bar .container {
            display: flex;
            justify-content: space-between;
            border-bottom: 1px solid rgba(255, 255, 255, 0.1);
            width: 1440px;
            padding: 22px 0;
        }


        /* ========== 2. 头部区域 (Header) - 双行布局 ========== */
        .header {
            position: absolute;
            top: 0px;
            left: 0;
            width: 100%;
            z-index: 1001;
            transition: all 0.3s ease;
            /* background: linear-gradient(to bottom, rgba(7,26,78, 0.8) 0%, rgba(45,88,203, 0) 100%); */
            background: linear-gradient(180deg, rgba(7, 26, 78, 1) 0%, rgba(45, 88, 203, 0.8) 100%);
            
        }

        

        .divider {
            height: 40px;
            width: 1px;
            background: rgba(255, 255, 255, 0.4);
            margin: 0 20px;
        }

        .college-title {
            font-size: 26px;
            font-weight: bold;
            letter-spacing: 2px;
        }

   
       
        .top-bar {
            font-family: MicrosoftYaHei;
            font-size: 16px;
            color: #FFFFFF;
            position: relative;

        }

        .top-bar .container {
            display: flex;
            justify-content: space-between;
            border-bottom: 1px solid rgba(255, 255, 255, 0.1);
            width: 1440px;
            padding: 22px 0;
        }


        .nav-menu {
            display: flex;
            justify-content: flex-start;
            gap: 2px;
        }

        .nav-item {
            position: relative;
            width: 160px;
            text-align: center;
            height: 50px;
            line-height: 50px;
        }

        .nav-item:hover a {
            color: #fff;
        }

       

        .tzgg::after {
            content: '';
            position: absolute;
            bottom: 5px;
            left: 20px;
            transform: translateX(-50%);
            width: 40px;
            height: 3px;
            background: #D4C590;
            transition: 0.3s;
            z-index: 3;
        }

       

        /* 下拉菜单*/
        .dropdown {
            position: absolute;
            top: 50px;
            left: 0;
            width: 100%;
            background: rgba(16, 28, 79, 0.9);
            backdrop-filter: blur(5px);
            opacity: 0;
            visibility: hidden;
            transition: all 0.3s ease;
            transform: translateY(10px);
            padding: 10px 0;
            z-index: 100;
        }

        .nav-item:hover .dropdown {
            opacity: 1;
            visibility: visible;
            transform: translateY(0);
        }

        .dropdown li a {
            display: block;
            color: rgba(255, 255, 255, 0.7);
            font-size: 13px;
            padding: 8px 0;
            transition: 0.2s;
        }

        .dropdown li a:hover {
            color: #fff;
            background: rgba(255, 255, 255, 0.1);
        }

        /* ================== 新增：三级导航按钮区域 ================== */
        .sub-nav-section {
            margin-bottom: 20px;
            border-bottom: 1px solid #eee;
            /* 按钮下方的分割线 */
            padding-bottom: 20px;
        }

        .sub-nav-title {
            font-size: 20px;
            color: #1a56a3;
            /* 标题蓝色 */
            font-weight: 700;
            margin-bottom: 15px;
        }

        .sub-nav-row {
            display: flex;
            gap: 10px;
            /* 按钮之间的间距 */
            justify-content: space-between;
        }

        .sub-nav-btn {
            flex: 1;
            /* 让三个按钮平分宽度 */
            display: block;
            background-color: #1a56a3;
            /* 按钮背景深蓝 */
            color: #fff;
            text-align: center;
            padding: 10px 0;
            border-radius: 4px;
            /* 圆角 */
            font-size: 15px;
            transition: background-color 0.3s;
            white-space: nowrap;
            /* 防止文字换行 */
        }

        .sub-nav-btn:hover {
            background-color: #0e3d82;
            /* 鼠标悬停更深 */
            color: #fff;
        }

        /* 选中状态（如果需要区分当前选中项，可以给a标签加 class="active"） */
        .sub-nav-btn.active {
            background-color: #0e3d82;
        }

        /* ================== 移动端适配 ================== */
        @media (max-width: 480px) {
            .sub-nav-title {
                font-size: 18px;
                margin-bottom: 12px;
            }

            .sub-nav-btn {
                font-size: 13px;
                /* 手机端字体稍微调小 */
                padding: 8px 0;
            }

            .sub-nav-row {
                gap: 8px;
                /* 手机端间距调小 */
            }
        }