body{
    background-color: #F3F3F3;
}
/*中间内容*/
.place{
   
}
.banner-inner {
    z-index: 1;
    position: absolute;
    top: 0;
    width: 100%;
    height: 100%;
}
.banner-wrapper {
    position: relative;
    height: 0;
    padding-top: 23.5%;
}


.banner-box{
    position:relative;
    /* width:100%; 
    height:100%; */
}
.banner-img-box{
    z-index: 1;
    /* position: absolute; */
    top: 0;
    width: 100%;
    height: 100%;
}
.banner-inner img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

/*面包屑*/
.navigation-box{
    background-color: #fff;
    color:#999999;
    padding-bottom:15px;
}
.navigation-content{
    height:80px;
    line-height:80px;
    border-bottom: 1px solid #EEEEEE;
}
.navigation-item{
    font-size: 20px;
    font-family: Source Han Sans SC VF-Normal, Source Han Sans SC VF;
    font-weight: 400;
    color: #999999;
    line-height: 23px;
}
.navigation-end{
    font-size: 20px;
    font-family: Source Han Sans SC VF-Normal, Source Han Sans SC VF;
    font-weight: 400;
    color: #333333;
    line-height: 23px;
}
.navigation-active{
    color:#21A63B;
    padding-bottom:27px;
    border-bottom:2px solid #21A63B;
}
.navigation-item:last-child{
    margin-right:0;
}


/*欧蒙研究院*/
.institute-box-big{
    padding-top:95px;
    padding-bottom:111px;
    background-color: #fff;
}
.institute-logo{
    width: 86px;
    height: 120px;
}
.institute-left{
    margin-right:69px;
}
.institute-title-box{
     padding-bottom:33px;
    border-bottom:1px solid #eee;
}
.institute-title{
    font-size: 48px;
    font-weight: bold;
    color: #333333;
    /* line-height: 56px; */
    margin-left:30px;
}
.institute-line{
    width: 55px;
    height: 4px;
    background: #21A63B;
}
.institute-desc{
    font-size:22px;
    color: #333333;
    margin-top:50px;
    margin-bottom:70px;
}
.institute-content{
    font-size:18px;
    color: #333333;
}
.institute-img{
    width:100%;
}
/*空中讲堂*/
.classroom-box-big{
    padding:63px 0;
}
.classroom-btn{
    /* width: 159px; */
    height: 50px;
    border-radius: 0px 0px 0px 0px;
    opacity: 1;
    border: 1px solid #21A63B;
    font-size: 16px;
    color: #21A63B;
    line-height: 50px;
    text-align: center;
    display: block;
    padding: 0 20px;
    width: fit-content;
}
.classroom-btn:hover{
    color: #21A63B;
}
.classroom-btn img{
    width:13px;
    margin-left:10px;
}
.classroom-img{
    width:100%;
}
.classroom-right{
    margin-left:71px;
}
.classroom-title{
    font-size: 27px;
    color: #333333;
    line-height: 30px;
    margin-bottom:33px;
}
.classroom-desc{
    font-size: 18px;
    color: #333333;
    line-height: 30px;
    margin-bottom:24px;
}

/*学术交流*/
.exchange-box-big{
    background-color: #fff;
    padding:60px 0;
   
}
.title{
    font-size: 48px;
    font-weight: bold;
    color: #333333;
    line-height: 56px;
    padding-bottom:30px;
}
.title-box{
    margin-bottom:62px;
    border-bottom:1px solid #EEEEEE;
}
.line{
    width: 55px;
    height: 4px;
    background: #21A63B;
}
.exchange-item{
    background-color: #F9F9F9;
}
.exchange-item:hover .exchange-title{
    color:#21A63B;
}

.exchange-content{
    padding:13px 19px;
}
.exchange-title{
    font-size: 18px;
    color: #333333;
    line-height: 32px;
    min-height:64px;
    /* padding-top:13px; */
}
.exchange-personal{
    font-size: 14px;
    color: #999999;
    line-height: 32px;
    min-height:64px;
    /* padding-bottom:13px; */
}
.more-title{
    font-size: 28px;
    font-family: Source Han Sans SC VF-Regular, Source Han Sans SC VF;
    color: #333333;
    line-height: 33px;
    margin-bottom: 46px;
}
.more-img{
    width:19px;
}
.exchange-item{
    margin-right:27px;
    margin-bottom:30px;
}
.exchange-img{
    width:100%;
}
.col-lg-3:nth-child(4n) .exchange-item{
    /* margin-right:0; */
    /* height:100%; */
}
.col-lg-3:last-child .exchange-item{
    height: calc(100% - 30px);
    flex-direction: column;
    justify-content: center;
    padding:13px 0;
}
/*学术资料*/
.means-box-big{
    background-color: #fff;
    padding-bottom:50px;
}
.means-item{
    padding:30px 0;
    border-bottom:1px solid #EEEEEE;
}
.means-item:hover{
    background-color: #F1F1F1;
}
.exchange-item:hover .means-box .means-title,.means-item:hover .means-box .means-title{
    color: #21A63B;
}
/* .means-lists .col-lg-12:first-child .means-item{
    padding-top:0;
} */
.means-img{
    width:250px;
    height:155px;
}
.means-title{
    font-size: 20px;
    color: #333333;
    line-height: 23px;
    margin-bottom:29px;
}
.means-desc{
    font-size: 16px;
    font-weight: 400;
    color: #999999;
    line-height: 19px;
    margin-bottom:29px;
}
.means-btn{
    width: 106px;
    height: 39px;
    font-size: 16px;
    color: #999999;
    line-height: 39px;
    border: 1px solid #999999;
    margin-left: 37px;

    position: absolute;
    right: 0;
    bottom: 30px;
}
.means-btn:hover {
    border: 1px solid #21A63B;
    color:#21A63B;
}
.means-btn:hover .active-img{
    display:inline-block;
}
.means-btn:hover .default-img{
    display:none;
}
.down-img{
    width:20px;
    height:16px;
}
.means-date{
    font-size: 14px;
    color: #AAAAAA;
    line-height: 16px;
}
.means-more-box{
    height: 100px;
    background: #F9F9F9;
    line-height: 100px;
    margin-top:40px;
}
.means-more-box:hover .means-more-title,.exchange-item:hover .more-title{
    color:#21A63B;
}
.means-box{
    padding-left:38px;
    width: 65%;
    /* width:70%; */
}
.means-more-title{
    font-size: 28px;
    color: #333333;
}
.means-more-box .more-img{
    margin-left:30px;
}
@media (max-width: 768px) {
      /*banner 和 导航*/
    .banner-title{
        font-size:20px;
    }
    .banner-wrapper {
        padding-top: 47%;
    }
    .banner-wrapper {
        position: relative;
        height: 0;
        padding-top: 23.5%;
    }
    .navigation-item,.navigation-end{
        font-size:16px;
    }
    .navigation-content{
        height:60px;
        line-height:60px;
    }
    .navigation-active{
        padding-bottom:20px;
    }

    .title-box{
        margin-bottom:30px;
    }
    .institute-title{
        font-size:18px;
    }
    .institute-desc{
        font-size:16px;
        margin:30px 0;
    }
    .institute-content{
        font-size:14px;
    }
    .institute-content span, .institute-content p{
        font-size:16px !important;
    }
    .institute-left {
        margin-right: 0;
    }
    .classroom-box-big{
        padding:30px 0;
    }
    .classroom-title{
        font-size:16px;
        line-height:24px;
        margin-bottom:20px;
    }
    .classroom-desc{
        font-size:14px;
        line-height:24px;
    }
    .classroom-right {
        margin-left:0;
    }
    .classroom-btn {
        /* width: 120px; */
        height: 30px;
        font-size: 12px;
        color: #21A63B;
        line-height: 30px;
        text-align: center;
    }
    .institute-box-big{
        padding:10px 0;
    }
    .title{
        font-size:18px;
        padding-bottom: 10px;
    }
    .exchange-box-big{
        padding:10px 0;
    }
    .exchange-title{
        font-size:14px;
        line-height: 21px;
        min-height:42px;
    }
    .exchange-personal{
        font-size:12px;
        line-height: 21px;
        min-height:42px;
    }
    .more-title{
        font-size:16px;
        margin-bottom: 10px;
    }
    .means-img{
        width:100px;
        height: 62px;
        object-fit: cover;
    }
    .means-box{
        padding-left:9px;
    }
    .means-more-box{
        height:60px;
        line-height: 60px;
    }
    .means-more-title{
        font-size:18px;
    }
    .means-btn {
        width: 106px;
        height: 30px;
        font-size: 14px;
        color: #999999;
        line-height: 30px;
        margin-left: 37px;
        bottom: 20px;
    }
    .means-item {
        padding: 20px 0;
    }
    .means-title{
        margin-bottom:20px;
        font-size:16px;
    }
    .means-desc{
        font-size:14px;
    }
    .means-date{
        font-size:12px;
    }
    .exchange-item{
        margin-right:15px;
    }
    .exchange-content {
        padding: 10px 7px;
    }
}