* {
        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(../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; */
    }

    /* 标题标签 */
    /* 标题标签 */
    /* 标签标题 */
    .about-section {
        margin: 70px 0 30px 0px;
        text-align: center;
        padding: 20px 20px;
        position: relative;
    }

    .about-bg {
        position: absolute;
        width: 100%;
        top: 20%;
        left: 50%;
        transform: translate(-50%, -50%);
        font-size: 65px;
        color: #edf2f7;
        font-weight: bold;
        z-index: -1;
    }

    .about-title {
        font-size: 32px;
        font-weight: bold;
        color: #333;
        /* margin-bottom: 20px; */
    }

    .wenzi {
        text-align: center;
        width: 850px;
        height: 69px;
        margin: 0 auto;
        color: #666666;
        font-size: 14px;
        line-height: 2;
    }

    /* 内容 */
    .S4 {
        width: 100%;
        display: flex;
        justify-content: center;
        align-items: center;
    }

    .S4-content {
        width: 100%;
        height: 100%;
        display: flex;
        flex-direction: column;
    }

    .S4-content-son {
        width: 100%;
        display: flex;
        align-items: center;
        justify-content: center;
        position: relative;
    }

    .S4-content-son .S4-content-son-left {
        width: 500px;
        height: 350px;
    }

    .S4-content-son .S4-content-son-left .left-topImg {
        width: 75%;
        height: 50%;
        background-image: url("../images/lunbo1.png");
        background-repeat: no-repeat;
        background-size: cover;
        background-position: center;
    }

    .S4-content-son .S4-content-son-left .left-buttom {
        background-image: url("../images/tuanti.png");
        background-repeat: no-repeat;
        background-size: cover;
        background-position: center;
        float: right;
        margin-top: 5px;
    }

    .S4-content-son .S4-content-son-right {
        width: 700px;
        height: 350px;
        padding: 20px 0 20px 20px;
    }

    .S4-content-son .S4-content-son-right .S4-content-son-rightText {
        width: 100%;
        height: 85%;
        background-color: #F7F7F7;
        margin-top: 40px;
        padding: 20px;
    }

    .S4-content-son .S4-content-son-right .S4-content-son-rightText>.span {
        color: #005AAD;
        font-size: 18px;
        font-weight: 600;
        margin-bottom: 20px;
    }

    .S4-content-son .S4-content-son-right .S4-content-son-rightText>span {
        font-size: 14px;
        color: #555555;
    }

    .S4-content-son .S4-content-son-leftText {
        width: 640px;
        /* height: 240px; */
        padding: 20px 20px 20px 5px;
        background-color: #F7F7F7;
        margin-top: 5%;
    }

    .S4-content-son .S4-content-son-leftText>.span {
        color: #005AAD;
        font-size: 18px;
        font-weight: 600;
        margin-bottom: 20px;
    }

    .S4-content-son .S4-content-son-leftText>p {
        color: #666;
        font-size: 14px;
        line-height: 2;
        margin: 10px 0;
    }

    .S4-content-son-rightImg {
        width: 500px;
        height: 350px;
        padding-left: 10px;
        padding-right: 20px;
    }

    .S4-content-son-rightImg .rightImg {
        width: 70%;
        height: 48%;
        background-image: url("../images/cangk.jpg");
        background-position: center;
        background-repeat: no-repeat;
        background-size: cover;
        float: right;
        margin-bottom: 5px;
    }

    .S4-content-son-rightImg .rightImg-left {
        background-image: url("../images/cangku.jpg");
        float: left;
    }

    .S4-content-son .leftBook {
        width: 700px;
        height: 400px;
        display: flex;
        justify-content: center;
        align-items: center;
    }

    .S4-content-son .leftBook img {
        width: 313px;
        height: 410px;
    }

    .S4-content-son .rightText {
        width: 800px;
        height: 100%;
        background-color: #F7F7F7;
        margin-top: 40px;
        margin-left: 40px;
    }

    .S4-content-son .rightText p {
        color: #666;
        font-size: 14px;
        line-height: 2;
    }

    .S4-content-son-Img {
        width: 500px;
        height: 600px;
        padding-left: 50px;
        padding-right: 20px;
        display: flex;
        flex-direction: column;
        justify-content: center;
        align-items: center;
    }

    .S4-content-son-Img .img {
        width: 100%;
        height: 40%;
        background-image: url("../images/huodong.jpg");
        background-repeat: no-repeat;
        background-size: cover;
        background-position: center bottom;
        margin: 10px 0;
    }

    .S4-content-son-Img .img1 {
        width: 100%;
        height: 40%;
        background-image: url("../images/qiye.jpg");
        background-position: center;
    }

    .S4-content-son-Img .img2 {
        background-image: url("../images/tuanti copy.png");
        background-position: center;
    }

    .S4-content-butm {
        width: 100%;
        height: 240px;
        display: flex;
        justify-content: center;
        padding: 0 20%;
        margin-bottom: 30px;
    }

    .S4-content-butm .butmSon {
        width: 100%;
        height: 100%;
        display: flex;
        justify-content: space-around;
        color: #666666;
        font-weight: 600;
    }

    .S4-content-butm .butm-leftImg {
        width: 50%;
        height: 100%;
        display: flex;
        flex-direction: column;
    }

    .S4-content-butm .butm-leftImg>img {
        width: 80%;
        float: right;
        height: 90%;
    }

    .S4-content-butm .butmSon p:hover {
        color: #005AAB;
    }

    .S4-content-butm .butmSonCul {
        width: 100%;
        height: 100%;
        display: flex;
        justify-content: space-between;
    }

    .S4-content-butm .butmSonCul .butm-culImg {
        width: 30%;
        position: relative;
        overflow: hidden;
    }

    .S4-content-butm .butmSonCul .butm-culImg>img {
        width: 100%;
        height: 90%;
        object-fit: cover;
        position: relative;
        overflow: hidden;
        transition: transform 0.3s ease;
    }

    .S4-content-butm .butmSonCul .butm-culImg p {
        position: absolute;
        bottom: 0px;
        left: 0;
        width: 100%;
        height: 100%;
        background-color: rgba(0, 123, 255, 0.5);
        color: white;
        font-weight: bold;
        display: flex;
        flex-direction: column;
        justify-content: center;
        align-items: center;
        padding: 20px;
        transform: translateY(100%);
        transition: transform 0.8s ease;
    }

    .S4-content-butm .butmSonCul .butm-culImg:hover p {
        transform: translateY(0);
    }

    .S4-content-butm .butmSonCul .butm-culImg p {
        margin: 0;
        text-align: center;
        font-size: 14px;
    }

     /* 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;
    }