.video{
    overflow: hidden;
}
.video .wrap{
    width: 1420px;
    margin: 55px auto 62px;
}
.video .wrap .title .headline{
    border-bottom: 1px solid rgba(230, 230, 230, 1);
    padding: 0 0 39px 0;
    margin: 0 0 39px 0;
}
.video .wrap .title .headline span{
    font-size: 40px;
    font-family: Source Han Sans CN;
    font-weight: bold;
    color: #333333;
    display: block;
    margin: 0 0 19px 0;
}
.video .wrap .title .headline p{
    font-size: 16px;
    font-family: ITCAvantGardeStd bk;
    font-weight: normal;
    color: #666666;
}
.video .wrap .title .classify{
    display: flex;
    align-items: center;
    flex-wrap: wrap;
}

.video .wrap .title .classify p,.video .wrap .title .classify a{
    font-size: 16px;
    font-family: Source Han Sans CN;
    font-weight: 400;
    color: #666666;
    margin: 0 20px 20px 0;
}

.video .wrap .title .classify a{
    margin: 0 35px 20px 0;
}
.video .wrap .title .classify a.on{
    color: rgba(0, 75, 170, 1);
}
.video .wrap .content{
    margin: 57px 0 0 0;
    display: flex;
    flex-wrap: wrap;
}
.video .wrap .content .item{
    width: 440px;
    margin: 0 50px 59px 0;
}
.video .wrap .content .item:nth-child(3n){
    margin: 0 0 59px 0;
}
.video .wrap .content .item .picture{
    width: 100%;
    height: 280px;
    position: relative;
    cursor: pointer;
    overflow: hidden;
}
.video .wrap .content .item .picture img{
    width: 100%;
    height: 100%;
    transition: 1s;
}
.video .wrap .content .item .picture .circle{
    position: absolute;
    right: 26px;
    bottom: 26px;
    width: 60px;
    height: 60px;
    background: rgba(255,255,255,0.5);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: 0.6s;
}
.video .wrap .content .item .picture .circle div{
    width: 0;
    height: 0;
    border-top: 8px solid transparent;
    border-bottom: 8px solid transparent;
    border-left: 13px solid #fff;
    transition: 0.6s;
}
.video .wrap .content .item .picture:hover img{
    transform: scale(1.1);
}
.video .wrap .content .item .picture:hover .circle{
    background: rgba(0, 75, 170, 1);
}
.video .wrap .content .item .text{
    margin: 18px 0 0 0;
    font-size: 18px;
    font-family: Source Han Sans CN;
    font-weight: 400;
    color: #666666;
}
.common_paging{
    margin: 5px auto 0;
}
@media screen and (max-width: 1600px) {
    .video .wrap {
        width: 90%;
    }
    .video .wrap .content .item {
        width: 32%;
        margin: 0 2% 59px 0;
    }
    .video .wrap .title .headline span {
        font-size: 32px;
    }
    .video .wrap .content .item .picture img {
        height: auto;
    }
    .video .wrap .content .item .picture {
        height: auto;
    }
}
@media screen and (max-width: 1200px) {
    .video .wrap .content .item {
        width: 49%;
        margin: 0 2% 59px 0;
    }
    .video .wrap .content .item:nth-child(3n) {
        margin: 0 2% 59px 0;
    }
    .video .wrap .content .item:nth-child(2n) {
        margin: 0 0% 59px 0;
    }

}
@media screen and (max-width: 900px) {
    .mark iframe {
        width: 90% !important;
        height: unset!important;
    }
}
@media screen and (max-width: 768px) {
    .video .wrap .content .item {
        width: 100%;
        margin: 0 0% 59px 0!important;
    }
}