/* 基础样式重置 */
    * {
        margin: 0;
        padding: 0;
        box-sizing: border-box;
        font-family: "Microsoft YaHei", "SimHei", sans-serif;
    }

    body {
        /* width: 1200px; */
        margin: 0 auto;
    }

    a {
        text-decoration: none;
    }

    /* 页头容器 */
    .header-container {
        position: relative;
        background: url(/cszdtext/lib/gywm/images/bgimg.png) no-repeat;
        background-position: 50% 50%;
        background-size: cover;
        opacity: 1;
        /* 米黄色背景 */
        padding: 0 50px;
        width: 100% !important;
        height: 480px !important;
        z-index: 0 !important;
        top: 0;
        left: 0;
    }

    /* 顶部信息栏 */
    .top-bar {
        display: flex;
        justify-content: space-between;
        align-items: center;
        height: 80px;
        /* 固定高度 */
    }

    /* 左侧logo区域 */
    .logo-box {
        display: flex;
        align-items: center;
        width: 33%;
    }

    .logo-img {
        width: 60px;
        height: 60px;
        margin-right: 12px;

        background-size: contain;
    }

    .logo-text {
        line-height: 1.3;
    }

    .company-name {
        font-size: 20px;
        color: #005ea6;
        /* 主色调蓝色 */
        font-weight: bold;
    }

    .english-name {
        font-size: 12px;
        color: #666;
    }

      /* 右侧功能区 */
    .right-function {
        width: 100%;
        display: flex;
        gap: 25px;
        flex-direction: row;
        justify-content: flex-end;
        flex-wrap: wrap;
        align-items: center;
        margin-left: -25px;
    }


    /* 快捷链接 */
    .quick-links {
        display: flex;
        gap: 25px;
    }

    .quick-links a {
line-height: 2;
    height: 25px;
    padding-left: 25px;
    border-left-width: 1px;
    border-left-style: solid;
    border-left-color: #EEEEEE;
        color: #333;
        text-decoration: none;
        font-size: 14px;
    }

    .quick-links a:hover {
        color: #005ea6;
    }

    /* 搜索框 */
    .search-container {
        display: flex;
        align-items: center;
    }

    .search-input {
        width: 180px;
        height: 30px;
        padding: 0 10px;
        border: 1px solid #ccc;
        border-right: none;
        outline: none;
        font-size: 13px;
    }

    .search-btn {
        height: 30px;
        padding: 0 12px;
        background-color: #005ea6;
        color: white;
        border: none;
        cursor: pointer;
        font-size: 14px;
    }

  /* 主导航栏 */
    .navbar {
        padding: 0;
    }

    .nav-list {
        display: flex;
        list-style: none;
        align-items: center;
    }

    .nav-item {
        position: relative;
    }

    .nav-link {
        display: block;
        padding: 16px 0px;
        color: #333;
        padding-left: 41px;
        text-decoration: none;
        transition: color 0.3s ease;
        position: relative;
        font-family: 'Noto Sans CJK';
        font-size: 16px;
        color: #333;
        font-weight: normal;
        font-style: normal;
    }

    .nav-link:hover {
    }

    .dropdown-menu {
        position: absolute;
        top: 113%;
        left: -3px;
        background-color: #fff;
        min-width: 150px;
        /* box-shadow: 0 5px 15px rgba(0, 0, 0, 0.08); */
        border-radius: 0 0 4px 4px;
        visibility: hidden;
        opacity: 0;
        transform: translateY(10px);
        transition: all 0.3s ease;
        z-index: 100;
    }

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

    /*         
        .dropdown-menu.show {
            opacity: 1;
            visibility: visible;
            transform: translateY(0);
        } */

    .dropdown-item {
        text-align: center;
        display: block;
        padding: 12px 20px;
        color: #666;
        text-decoration: none;
        transition: all 0.2s ease;
        /* border-bottom: 1px solid #f0f0f0; */
    }

    .dropdown-item:hover {
        background-color: #005AAB;
        color: #f8f9fa;
    }

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

    /* 模块 */
    .mokuai {
       font-size: 20px;
    background: #005ea6;
    width: 30%;
    height: 100px;
    position: absolute;
    float: left;
    margin-top: -34px;
    text-align: right;
    line-height: 105px;
    padding-right: 140px;
    color: #fff;
    font-weight: bolder;
    font-family: Source Han Sans, Geneva, sans-serif;
    }

    /* from表单 */
    .from {
        text-align: end;
    height: 66px;
    display: flex;
    justify-content: flex-end;
    flex-direction: row;
    list-style: none;
    }

    .from .title {
        text-align: center;
        line-height: 3;
        display: inline-block;
        width: 118px;
        color: #4a4a4a;
        border-bottom: 3px solid transparent;
        /* 透明边框，为了切换时更平滑 */
        transition: all 0.3s ease;
        /* 过渡效果，切换更平滑 */
    }

    .from .active {
        border-bottom: 3px solid green;
    }

    .from .title:hover {
        color: #1890ff;
        border-bottom: 3px solid green;
        /* transition: border 0.3s ease; */
    }
    /* tab切换 */
    .content-item {
        /* display: none; */
    }

    .content-item.active {
        display: block;
    }
    .S2 {
        width: 100%;
        margin: 60px 0;
        /* padding: 0 15%; */
        

        .ul {
            width: 100%;
            background-color: #f5f7fa;
        }

        .year {
            width: 100%;
            display: flex;
            list-style: none;

            li {
               border-right: 1px solid #cccccc52;
                padding: 10px 40px;
            }

            li.active {
                color: white;
                background-color: #005AAB;
            }
        }


        .tab-container {
            width: 80%;
            margin: 20px auto;
        }

        /* 标签栏：横向排列按钮 */
        .tab-header {
            display: flex;
            border-bottom: 1px solid #eee;
        }

        /* 标签按钮：默认与激活态 */
        .tab-btn {
            padding: 10px 20px;
            border: none;
            background: #f5f7fa;
            cursor: pointer;
            transition: background 0.3s;
        }

        .tab-btn.active {
            background: #005ea6;
            color: white;
        }

        /* 内容栏：隐藏未激活的面板 */
        .tab-content {
            padding: 20px;
        }

        .tab-panel {
            display: none;
        }

        .tab-panel.active {
            display: block;
        }

        /* 时间线样式（可选，还原示例的时间线视觉） */
        .timeline {
            list-style: none;
            padding: 0;
        }

        .timeline li {
             position: relative;
    padding-left: 30px; /* 增大左内边距，避免文字和线条重叠 */
    margin-bottom: 35px; /* 增大项间距，让线条有足够长度 */
        }
         .timeline li::before {
    content: "●";
    position: absolute;
    left: -10px; /* 向左微调，和线条对齐 */
    top: 0;
    color: #005ea6;
    font-size: 14px; /* 圆点大小，确保线条从中心穿过 */
    z-index: 2; /* 圆点在线条上方，避免被线条覆盖 */
}
    .timeline li::after {
        content: "";
        position: absolute;
        left: 4px;
        top: 14px;
        width: 1px;
        height: calc(100% + 32px);
        background-color: rgb(211, 211, 211);
        z-index: 1;
}

/* 最后一个li不需要线条（避免底部多出线） */
.timeline li:last-child::after {
    display: none;
}
        .year1 {
            display: inline-block;
            width: 60px;
            font-weight: bold;
            color: #005ea6;
        }

        .timeline li::before {
            content: "●";
            position: absolute;
            left: 0;
            color: #005ea6;
        }
    }


   /* footer */
    .footer {
        margin-top: 50px;
        /* background-color: #0066cc; */
        color: #fff;
        font-size: 14px;
        padding: 20px 0;
        text-align: center;
    }

    /* 顶部链接区域 */
    .footer-nav {
        background-color: rgb(0, 90, 171);
        line-height: 4;
        font-weight: normal;
        font-style: normal;
        font-family: 'Noto Sans CJK';
    }

    .footer-nav a {
        font-weight: normal;
        font-style: normal;
        font-family: 'Noto Sans CJK';
        color: #fff;
        text-decoration: none;
        margin: 0 12px;
    }

    .footer-nav a:hover {
        text-decoration: underline;
    }

    /* 备案资质区域 */
    .footer-info {
        line-height: 25px;
        background-color: rgb(0, 90, 171);
        margin-bottom: 15px;
        font-weight: normal;
        font-style: normal;
        font-family: 'Noto Sans CJK';
    }

    .footer-info img {
        vertical-align: middle;
        margin-right: 5px;
        width: 14px;
        height: 16px;
    }

    /* 底部IPv6说明 */
    .footer-ipv6 {
        line-height: 2;
        font-weight: normal;
        font-style: normal;
        font-family: 'Noto Sans CJK';
        font-size: 12px;
        color: #999;
    }