*{
    padding: 0;
    margin: 0;
    box-sizing: border-box;
}
body{
    font-family: Open Sans, icomoon, sans-serif;
}
body,html{
    width: 100%;
    height: 100%;
}
.center{
    width: 1200px;
    margin: 0 auto;
}
header{
    box-shadow: 0 0 10px rgba(0,0,0,0.15);
    width: 100%;
    height: 100px;
    background-color: #fff;
    border-bottom: 1px solid #d6d6d6;
   
}
/* 轮播图 */
.carousel-box{
    width: 1076px;
    height: 180px;
    margin: 0 auto;
}
.carousel-container {
    position: relative;
    width: 100%;
    height: 150px;
    overflow: hidden;
    margin: 0 auto;
  }
 .carousel-slide {
    display: flex;
    transition: transform 0.5s ease;
  }
  
  .carousel-image {
    min-width: 100%;
    height: 100%;
    
  }
  
  .carousel-prev, .carousel-next {
    position: absolute;
    top: 50%;
    transform: translateY(-50%);
    background-color: rgba(0, 0, 0, 0.5);
    color: white;
    border: none;
    cursor: pointer;
    padding: 10px;
  }
  
  .carousel-prev {
    left: 10px;
  }
  
  .carousel-next {
    right: 10px;
  }
  
  .carousel-indicators {
    position: absolute;
    bottom: 10px;
    left: 50%;
    transform: translateX(-50%);
    text-align: center;
  }
  
  .carousel-dot {
    display: inline-block;
    width: 40px;
    height: 3px;
    background-color: rgba(223, 98, 98, 0.4);
    margin: 0 5px;
    cursor: pointer;
  }
  
  .carousel-dot.active {
    background-color: red;
  }

.banner{
    margin-top: 20px;
}
.top{
    display: flex;
    justify-content: space-between;
    align-items: center;
    height: 100%;
}
.logo img{
    width: 180px;
}
.top-r{
  display: flex;
}
.top-r input{
    margin-right: 100px;
    width: 280px;
    height: 45px;
    padding-left: 10px;
}
.ss{
    position: relative;
    width: 280px;
    height: 45px;
    margin-right: 100px;
}
.wbss{
    position: absolute;
    right: 0;
    top: 0;
    width: 45px;
    height: 45px;
    background-color: rgb(118, 118, 118);
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
   
}
.wbss img{
    height: 30px;
}
.login a{
    text-decoration: none;
    color: rgb(31, 66, 128);
    font-weight: bold;
}
.main{
    
}
.gg{
    margin-top: 15px;
   display: flex;
   justify-content: center;
}
.imeta{
    width: 100%;
    display: flex;
    margin-top: 30px;
}
.imeta-l{
    display: flex;
    flex-direction: column;
    flex: 3;
}
.imeta-l img{
    /* height: 100px; */
    height: 85px;
    margin-bottom: 10px;
}
.imeta-l a, .imeta-r a{
    text-transform: uppercase;
    color: #123d80;
    text-decoration: none;
    font-family: 'Open Sans';
    font-style: normal;
    font-weight: 600;
    font-size: 12px;
    margin-bottom: 5px;
}
.imeta-l span,.imeta-r span{
    color: #373737;
    font-size: 14px;
    margin: 5px 0;
}
.imeta-r{
    flex: 2;
    display: flex;
    
}
.imeta-r img{
    box-shadow: 0 0 10px 0 rgba(0, 0, 0, .5);
    height: 160px;
}
.wenzi{
    display: flex;
    flex-direction: column;
    justify-content: center;
    /* align-items: center; */
    margin-left: 20px;
}
nav{
    width: 100%;
    height: 58px;
    background-color: #002c40;
    margin-top: 30px;
}
.nav-box{
    display: flex;
    justify-content: space-between;
    height: 100%;
    align-items: center;

}
.nav-list{
    display: flex;
    list-style: none;
    color: #fff;
}
.nav-item{
    margin: 0 10px;
    position: relative;
}

.er-menu li a {
    color: #656565;
  }
.er-menu{
    display: none; /* 默认隐藏 */
    position: absolute;
    top: 175%;
    left: 0;
    border: 1px solid #123d80;
    background-color: #fff;
    min-width: 120px;
    z-index: 1;
   
}
.er-item{
    
    text-align: center;
}
.er-item:hover{
    background-color: #002c40;
    color: #fff;
}
.er-item:hover a{
    color: #fff;
}
/* .nav-item:hover .er-menu{
    display: block;
  
} */
.nav-item.active .er-menu {
    display: block; /* 当父元素有active类时显示 */
  }
.er-menu li {
    padding: 12px 16px;
  }
.nav-item a{
    color: #fff;
    text-decoration: none;
    font-size: 14px;
}
.nav-pic img{
    height: 30px;
    width: 30px;
    margin-right: 10px;
}
.info-box{
    display: flex;
}
.info-l{
    width: 70%;

}
.info-r{
    width: 30%;
   
    /*height: 300px;*/
    margin-left: 50px;
}
.info-box{
    margin-top: 40px;
}
.dl{
    color: #292b2c;
    font-size: 14px;
    margin: 5px 0;
}
.wt{
    margin: 15px 0;
}
.dl-list{
    padding-left: 40px;
}
.read{
    color: #123d80;
    text-decoration: none;
}
.video {
    height: 300px;
    display: flex;
    justify-content: center;
    align-items: center;
    margin-top: 20px;
}
.video img{
    height: 100%;
}
.line{
    width: 100%;
    height: 1px;
    background-color: #d6d6d6;
    margin: 10px 0;
}
.tabs-box{
    margin-top: 20px;
}
 /* 选项卡容器样式 */
 .tabs {
    display: flex; /* 弹性布局 */
   
    margin-bottom: 20px; /* 下边距 */
  }
  /* 单个选项卡样式 */
  .tab {
    padding: 10px 20px; /* 内边距 */
    cursor: pointer; /* 指针样式 */
    margin-right: 10px;
    font-weight: 600;
    color: #002c40;
    background-color: rgb(239, 239, 240);
  }
  /* 激活的选项卡样式 */
  .tab.active {
    padding: 10px 20px; /* 内边距 */
    background-color:#002c40;
    color: #fff;
 
  }
  /* 选项卡内容样式 */
  .tab-content {
    display: none; /* 默认隐藏 */
  }
  /* 激活的选项卡内容样式 */
  .tab-content.active {
    display: block; /* 显示 */
  }
  .syline{
    transform: translateY(-20px);
    background-color: #123d80;
  }
  .corr{
    font-weight: 400;
    color: #1c1d1e;
    font-size: 15px;
  }
.jzss{
    display: flex;
    align-items: center;
}
.sx{
    margin: 0 10px;
    color: #656565;
}
.jzss img{
    transform: translateY(2px);
    width: 13px;
}
.acc{
    color: #b92d80;
    font-size: 14px;
    margin-left: 4px;
}
h3{
    color: #002c40;
    font-size: 15px;
}
.pic-txet img{
    float: left;
    width: 250px;
    /* padding: 10px; */
    padding-right: 18px;
}
.pic-txet{
    border-left: 4px solid #d6d6d6;
    padding-left: 10px;
}
.pic-txet img{
    width: 230px;
}
.separator{
    list-style: none;
    display: flex;
    margin-top: 10px;
}
.separator li{
    margin: 0 10px;
    color: #d8d8d8;
}
.separator a{
    text-decoration: none;
    color: #002c40;
    font-size: 13px;
    font-weight: bolder;
}
.more{
    display: flex;
    justify-content: end;
   
   
}
.more a{
    text-decoration: none;
    color: #002c40;
    font-size: 13px;
}
/* .iss-list{
    display: flex;
    margin-top: 20px;
  
    justify-content: flex-start;
    flex-wrap: wrap;
}
.iss-item{
    width: calc((100% - 40px)/2);
    margin-right: 40px;
    display: flex;
} */
/* .iss-item */
.iss-list {
    display: flex;
    margin-top: 20px;
    justify-content: flex-start;
    flex-wrap: wrap;
}

.iss-item {
    width: calc(50% - 20px); /* 每个项目占一半宽度减去一个间距 */
    margin-right: 40px;
    display: flex;
    margin-bottom: 30px;
}

.iss-item:nth-child(2n) {
    margin-right: 0; /* 移除每行第二个项目的右边距 */
}
.iss-item img{}
.iss-info{
    display: flex;
    flex-direction: column;
    margin-left: 15px;
}
.iss-info a{
    text-decoration: none;
    color: #002c40;
    font-size: 15px;
}
.iss-info span{
    color: #656565;
    font-size: 13px;
    margin-top: 3px;
}
footer{
    background-color: #002c40; 
    color: #002c40;
    
    width: 100%;
    padding: 0px;
    /* 新增样式 */
    position: relative; /* 确保footer在正常文档流中 */
    z-index: 1; /* 确保footer层叠顺序高于其他可能覆盖它的元素 */
    align-self: flex-end; /* 确保footer始终在底部 */
}
/* 添加媒体查询以在小屏幕上隐藏footer */
@media (max-width: 767px) {
    footer {
        display: none; /* 隐藏footer */
    }
}
.footer-list{
    list-style: none;
    padding-top: 20px;
    flex: 1;
}
.footer-item{
    margin-bottom: 10px;
}
.footer-item a{
    color: #fff;
    text-decoration: none;
    font-size: 14px;
   
}
.footer-item-custom a{
    font-size: 16px;
}
.all-list{
    display: flex;
}
.bai-line{
    width: 100%;
    height: 1px;
    background-color: #fff;
    margin: 20px 0;
}
.db-f{
    display: flex;
    justify-content: space-between;
    margin-top: 20px;
}
.db-f img{
    height: 20px;
}
.db-f-bq{
    width: 350px;
    font-size: 12px;
}

/*  */
.email,.box-nr{
    display: flex;
}
.email-l img{
    width: 28px;
    height: 20px;
    margin-right: 20px;
}
.form{
    display: flex;
    flex-direction: column;
}
.form input{
    height: 30px;
    padding: 5px;
    margin: 5px 0;
}
.btn-box{
    display: flex;
    justify-content: end;
}
.btn{
    width: 50%;
    height: 35px;
    background-color: #002c40;
    color: #fff;
    border: none;
    margin-top: 10px;
    
}
.box2{
    margin-top: 20px;
}
.a-ys{
    color: #002c40;
    text-decoration: none;
}
.box2-item:hover{
    
}
.science{
    border:1px solid #d6d6d6 ;
    width: 100%;
    height: 250px;
    display: flex;
    flex-direction: column;
    align-items: center;
    padding: 20px;
}
.science img{
    width: 165px;
}
.Journal,.access{
    margin-top: 30px;
}
.Journal-list{
    padding-left: 20px;
    margin-top: 10px;
}
.Journal-item{
    margin-bottom: 5px;
}
.Journal-item a{
    text-decoration: none;
    color: #123d80;
    font-size: 14px;
}

.Journal-item:hover a{
    color: #292b2c;
}
.access img{
    margin-top: 5px;
    
}
.related{
    margin-top: 10px;
}
.related img{
    padding: 10px 10px 0 0;
}
.related-box{
    display: flex;
}
.related-r a{
    text-decoration: none;
    font-size: 12px;
    color: #656565;
}