* {
        margin: 0;
        padding: 0;
        box-sizing: border-box;
        font-family: Arial, sans-serif;
    }
    a{
        text-decoration: none;
    }
    .header {
        background-color: #fff;
        color: white;
    }
    iframe {
        min-height: 500px
    }
    .header-container {
        display: flex;
        justify-content: space-between;
        align-items: center;
        max-width: 1440px;
        margin: 0 auto;
        margin: 10px auto;
    }
    .youceguanggaowei{
        width: 100%;
        height: 90px;
        border-radius: 10px;
        display: flex;
        flex-direction: column;
        align-items: center;
        justify-content: center;
    }
    .youceguanggaowei>div{
        width: 100%;
        height: 100%;
    }
    .logo {
        width: 550px;
        height: 60px;
        display: flex;
        align-items: center;
        background-image: url('../images/logo.png');
        background-size: 100% auto;
        background-position: center;
        background-repeat: no-repeat;
    }
    .search-bar {
        display: flex;
        align-items: center;
        background-color: white;
        border-radius: 4px;
    }
    .search-bar input {
        border: none;
        outline: none;
        padding: 5px;
        height: 30px;
        box-sizing: border-box;
        width: 200px;
        border: 1px solid #a1a1a1;
        border-right: none;
    }
    .search-bar div{
        width: 40px;
        height: 30px;
        background-color: #ff9a2e;
        border: 1px solid #ff9a2e;
        border-left: none;
        background-image: url('../images/search.png');
        background-size: auto 80%;
        background-position: center;
    background-repeat: no-repeat; 
    }
    .nav {
        background-color: #207b58;
        height: 65px;
        display: flex;
        justify-content: center;
        max-width: 1920px;
        margin: 0 auto;
        box-sizing: border-box;
        
    }
    .nav-container {
        /* width: 1200px; */
       width: 1440px;
        display: flex;
    }
    .nav-container>div{
        flex: 1;
        align-self: auto;
        /* height: 200px; */
        min-height: 0; /* 关键设置：允许元素高度小于父容器 */
        /* border: 1px solid red; */
        z-index: 2;
        overflow: hidden;
        /* transition: 0.5s; */
    }
    
    .nav-container>div:hover a:not(:first-child) {
        display: flex;
    }
    
    .nav-container>div a:not(:first-child) {
        display: none;
        background-color: rgba(32, 123, 88, 0.95);
    }
    .nav-menu>div:nth-child(1)>a{
        background-color: #ff9a2e;
    }
    .nav-item {
        display: flex;
        align-items: center;
        justify-content: center;
        color: #fff;
        height: 65px;
        font-size: 18px;
    }
    .nav-item:hover {
        background-color: #ff9a2e;
        cursor: pointer;
    }
    .hero {
        max-width: 1920px;
        height: 300px;
        background: linear-gradient(to right, #e6f7ff, #b3e0ff);
        display: flex;
        align-items: center;
        justify-content: center;
        position: relative;
        overflow: hidden;
        background-image: url('../images/headImg.png');
        background-size: auto 100%;
        background-position: center;
        background-repeat:no-repeat ;
        margin: 0 auto;
    }
    
    .tag{
        max-width: 1440px;
        margin: 20px auto;
    }
    .tag>span{
        color: #006633;
    }          

    .content{
        max-width: 1440px;
        min-height: 900px;
        margin: 0 auto;
        margin-top: 20px;
    }
    .departmentsItem{
        margin-bottom: 20px;
    }
    .departmentsItem>div:nth-child(1){
        width: 100%;
        height: 40px;
        border-bottom: 1px solid #ededed;
    }
    .departmentsItem>div:nth-child(1)>div{
        width: 100px;
        height: 100%;
        display: flex;
        align-items: center;
        justify-content: center;
        border-bottom: 3px solid #207b58;
    }
    .departmentsItem>div:nth-child(2){
        width: 100%;
        margin-top: 20px;
        display: grid;
        grid-template-columns: 1fr 1fr 1fr 1fr;
        gap: 20px;
    }
    .departmentsItem>div:nth-child(2)>a{
        width: 330px;
        height: 50px;
        background-color: #f2f3f5;
        border-radius: 5px;
        display: flex;
        align-items: center;
        cursor: pointer;
    }
    .departmentsItem>div:nth-child(2)>a>div:nth-child(1){
        width: 5px;
        height: 20px;
        background-color: #207b58;
        margin-left: 15px;
    }
    .departmentsItem>div:nth-child(2)>a>div:nth-child(2){
        width: 260px;
        color: #207b58;
        margin-left: 15px;
    }
    .departmentsItem>div:nth-child(2)>a>div:nth-child(3){
        width: 20px;
        height: 20px;
        background-image: url('../images/jtRight.png');
        background-size: 100% 100%;
    }
    
    .footer {
        background-color: #207b58;
        color: white;
        max-width: 1920px;
        margin: 0 auto;
        box-sizing: border-box;
    }
    .footer>div:nth-child(1){
        width: 1440px;
        margin: 0 auto;
        display: flex;
        flex-wrap: wrap;
        justify-content: space-between;
    }
    .footer>div:nth-child(1)>div:nth-child(1){
        width: 480px;
        height: 120px;
        display: flex;
        flex-direction: column;
        justify-content: space-between;
        border-right: 1px solid #ededed;
        margin-top: 30px;
    }
    .footer>div:nth-child(1)>div:nth-child(1)>div{
        display: flex;
    }
    .footer>div:nth-child(1)>div:nth-child(1)>div>div:nth-child(1){
        min-width: 100px;
    }
    .footer>div:nth-child(1)>div:nth-child(2){
        width: 300px;
        height: 70px;
        display: flex;
        flex-direction: column;
        justify-content: space-between;
        margin-top: 30px;
    }
    .footer>div:nth-child(1)>div:nth-child(2)>div{
        display: flex;
    }
    .footer>div:nth-child(1)>div:nth-child(2)>div>div:nth-child(1){
        min-width: 100px;
    }
    .footer>div:nth-child(1)>div:nth-child(3){
        width: 600px;
        height: 200px;
        display: flex;
        justify-content: space-between;
        align-items: center;
    }
    .footer>div:nth-child(1)>div:nth-child(3)>div{
        width: 150px;
        height: 155px;
        display: flex;
        flex-direction:column;
        justify-content: space-between;
        align-items: center;
    }
    .footer>div:nth-child(1)>div:nth-child(3)>div>div:nth-child(1){ 
        width: 130px;
        height: 130px;
        background-size: 100% 100%;
    }
    .footer>div:nth-child(1)>div:nth-child(3)>div>div:nth-child(2){ 
        font-size: 12px;
    }
    .footer>div:nth-child(1)>div:nth-child(3)>div:nth-child(1)>div:nth-child(1){
        background-image: url("../images/icon-5.png");
    }
    .footer>div:nth-child(1)>div:nth-child(3)>div:nth-child(2)>div:nth-child(1){
        background-image: url("../images/icon-6.png");
    }
    .footer>div:nth-child(1)>div:nth-child(3)>div:nth-child(3)>div:nth-child(1){
        background-image: url("../images/icon-7.png");
    }

    .mobile-nav-toggle {
        display: none;
        flex-direction: column;
        justify-content: space-between;
        width: 30px;
        height: 21px;
        position: absolute;
        top: 10px;
        right: 20px;
        z-index: 20;
        cursor: pointer;
    }
    
    .mobile-nav-toggle span {
        display: block;
        height: 3px;
        width: 100%;
        background-color: #fff;
        border-radius: 3px;
    }


    /* 媒体查询当宽度小于768px时，将background-size: auto 100%;改为background-size: 100% auto; */
    @media (max-width: 768px) {

        .header{
            max-width: 100%;
            /* border: 1px solid red; */
            margin: 0 auto;
        }
        .header-container{
            max-width: 90%;
            /* border:1px solid red; */
        }
        .search-bar>input{
            width: 100px;
            display: none;
        }
        .nav{
            height: auto;
            /* border: 1px solid red; */
            position: relative;
        }
        .mobile-nav-toggle {
            display: flex;
        }
        .nav-container {
            max-width: 100%;
            /* border: 1px solid red; */
            height: auto;
            overflow-x: visible;
            flex-wrap: wrap;
            padding: 0 5%;
            display: none; /* 默认隐藏导航菜单 */
        }
        .nav-container.active {
            display: flex; /* 当添加active类时显示导航菜单 */
        }
        .nav-container > div {
            min-width: 33.33%;
            text-align: center;
            position: relative;
        }
        .nav-item {
            height: 40px;
            font-size: 14px;
            padding: 0 5px;
        }
        .nav-container > div a:not(:first-child) {
            position: relative;
            width: 100%;
            z-index: 10;
            border-top: 1px solid rgba(255, 255, 255, 0.1);
        }
        .nav-container > div:hover {
            background-color: #ff9a2e;
        }
        .nav-menu{
            width: 100%;
        }
        .hero {
            height: 200px;
        }
        .tag{
            max-width: 90%;
            /* border: 1px solid red; */
        }

        .content{
            max-width: 90%;
        }
        .departmentsItem>div:nth-child(2){
                display: flex;
                flex-direction: column;
                align-items: center;
        }

        .footer>div:nth-child(1){
            width: 90%;
        }
        .footer>div:nth-child(1)>div:nth-child(3){
            width: 100%;
        }
        .footer>div:nth-child(1)>div:nth-child(3)>div{
            width: 100px;
            height: 130px;
        }
        .footer>div:nth-child(1)>div:nth-child(3)>div>div:nth-child(1){
            width: 100px;
            height: 100px;
        }
    }