.el-row{
    max-width: 1230px;
    margin: 0 auto;
}
.main-box{
    display: flex;
    margin: 10px 0;
    min-height: 500px;
}
.main-box .main-left{
    width: 280px;
    background: #f0f6ff;
    padding: 10px 20px;
    border-radius: 10px;
}
.main-box .main-right{
    padding: 10px 20px;
    margin-left: 10px;
    width: calc(100% - 320px - 50px );
    background: #f0f6ff;
    border-radius: 10px;
}
.main-box .main-left .left_nav{
    margin-bottom: 25px;
}
.main-box .main-left .left_nav li{
    height: 30px;
    line-height: 30px;
    font-size: 20px;
    position: relative;
    padding-left: 20px;
}
.main-box .main-left .left_nav li:nth-child(n+2){
    margin-top: 10px;
}
.main-box .main-left .left_nav li.active:after{
    content: "";
    width: 10px;
    height: 30px;
    display: block;
    position: absolute;
    background: linear-gradient(90deg, #008cff, transparent);
    top: 0;
    left: 0;
    border-radius: 20px;
}
.main-box .main-left .left_nav li a{
    color: #005bb9;
    display: inline-block;
}
.main-box .main-left .left_nav li.active{
    font-weight: 700;
}
.main-box .main-left .left_nav li a:hover{
    color: #00cff1;
    font-weight: 700;
}
#advertisement{
    border-radius: 10px;
    overflow: hidden;
    box-shadow: 0 0 10px 2px #c9c9c9;
}
#advertisement .nb-item img{
    width: 100%;
    height: 100%;
}
.main-box .main-right .no_article{
    width: 100%;
    height: 100%;
    background: url("/images/no_content.png") no-repeat center center;
    position: relative;
}
.main-box .main-right .no_article p{
    text-align: center;
    color: #818181;
    font-size: 25px;
    margin-top: 0;
    position: absolute;
    top: calc(50% + 70px);
    left: calc((100% - 100px)/2);
    opacity: 0.8;
}
.main-box .main-right .article_list .item{
    width: 100%;
    cursor: pointer;
    margin: 20px 0;
    padding: 10px 0;
    display: flex;
    transition: all 300ms;
    background: #ffffff;
}
.main-box .main-right .article_list .item:hover{
    box-shadow: 0 0 10px 0 #dddddd;
    border-radius: 10px;
}
.main-box .main-right .article_list .item:hover *{
    color: #0a61a1 !important;
}
.main-box .main-right .article_list .item:hover .footer i{
    left: calc((100% - 25px)/2);
}
.main-box .main-right .article_list .item .head{
    width: 100px;
    text-align: center;
    position: relative;
}
.main-box .main-right .article_list .item .head .float_box{
    width: 80px;
    height: 80px;
    position: absolute;
    top: calc((100% - 80px)/2);
    left: 10px;
}
.main-box .main-right .article_list .item .head:after{
    content: "";
    position: absolute;
    height: 100%;
    width: 0;
    top: 0;
    right: 0;
    border-right: 1px dashed #b7b7b7;
}
.main-box .main-right .article_list .item .head .date{
    font-size: 30px;
    font-weight: bold;
    color: #4c4c4c;
    padding-top: 14px;
}
.main-box .main-right .article_list .item .head .ym{
    font-size: 16px;
    font-weight: 700;
    color: #a3a3a3;
}
.main-box .main-right .article_list .item .content{
    width: calc(100% - 250px - 70px);
    max-height: 150px;
    flex: 1;
}
.main-box .main-right .article_list .item .content .title{
    font-size: 20px;
    font-weight: bold;
    color: #262626;
    padding: 10px;
    overflow: hidden;
    text-overflow: ellipsis;
    word-break: keep-all;
    height: 30px;
    line-height: 30px;
    white-space: nowrap;
}
.main-box .main-right .article_list .item .content .detail{
    padding: 0 10px;
    height: calc(100% - 68px);
    font-size: 16px;
    color: #3a3a3a;
    overflow: hidden;
    position: relative;
    min-height: 45px;
    line-height: 21px;
}
.main-box .main-right .article_list .item .content .detail:after{
    content: "...";
    position: absolute;
    bottom: 0;
    right: 0;
    font-weight: 700;
}

.main-box .main-right .article_list .item .footer{
    width: 50px;
    font-size: 25px;
    color: grey;
    overflow: hidden;
    position:relative;
}
.main-box .main-right .article_list .item .footer i{
    position: absolute;
    transition: all 200ms;
    top: calc((100% - 25px)/2);
    left: -25px;
}
.main-box .main-right .article_list .pagination{
    margin-top: 50px;
}
.main-box .main-right .article_list .pagination .el-pagination{
    text-align: center;
}
.main-box .main-right .article_list .pagination .el-pagination .el-pager li{
    background: #ffffff ;
}
.main-box .main-right .article_list .pagination .el-pagination .btn-prev{
    background: #ffffff ;
}
.main-box .main-right .article_list .pagination .el-pagination .btn-next{
    background: #ffffff ;
}
.main-box .main-right .article_list .pagination .el-pagination.is-background .el-pager li:not(.disabled).active{
    background-color: #409EFF;
}
.main-box .main-right .article_list .item .head_img{
    width: 150px;
    height: 150px;
    overflow: hidden;
    margin: 0 10px;
    border-radius: 10px;
}
.main-box .main-right .article_list .item .head_img .el-image{
    width: 100%;
    height: 100%;
}
#advertisement .nb-item a{
    display: block;
    width: 100%;
    height: 100%;
}
.image-slot{
    display: flex;
    justify-content: center;
    align-items: center;
    width: 100%;
    height: 100%;
    background: #f5f7fa;
    color: #909399;
    font-size: 30px;
}
.el-image{
    width: 100%;
    height: 100%;
}