.VideoList_a1 ul{display: block;}
.VideoList_a1 em{position: relative;display: block;overflow: hidden;background-color: #edfbff;height: 19.1vw;box-sizing:border-box;border-radius: 4px;}
.VideoList_a1 em::after {content: "";position: absolute;bottom: 0;left: 0;width: 100%;height: 0%;background: rgba(0,162,233,0.8) url(../images/play.png) no-repeat center ;
z-index: 1;transition:.4s all ease;-ms-transition:.4s all ease;-webkit-transition:.4s all ease;}
.VideoList_a1 em img{display: inline-block;width: 100%;position: absolute;top: 50%;height: 100%;object-fit:cover;
    left: 50%; transform: scale(1) translate(-50%, -50%);-webkit-transform: scale(1) translate(-50%, -50%);
transition:.4s all ease;-ms-transition:.4s all ease;-webkit-transition:.4s all ease;}
.VideoList_a1 li{display: block;float: left; width: 29.5%;margin: 0 1.9% 3.9vw 1.9%;}
.VideoList_a1 li span{text-align: center;line-height: 1.5; font-size: 16px;width: 100%;margin-top: 1.3vw;color: #151515;
overflow:hidden;text-overflow:ellipsis;white-space:nowrap;display: block;}

.VideoDisplay_a1{width:100%; margin:0 auto;}
.VideoDisplay_a1 h2{ display:block; line-height:1.2; padding-bottom: 1.5vw;font-size: 22px; text-align:center;}
/*.VideoDisplay_a1_C{ height:700px;}*/
.VideoDisplay_a1_C iframe{max-width: 100% !important;height: 33vw;width: 87.5%;}
.VideoDisplay_a1_C embed{max-width: 100% !important;height: 33vw;width: 87.5%;}

.VideoDisplay_a1_back{text-align:center; height:40px; margin-top:30px;}
.VideoDisplay_a1_back a{width:150px;}
.VideoDisplay_a1_C{text-align: center;}

.VideoDisplay_a1_back a.more{color: #164161;display:inline-block;font-weight: lighter; border: 1px solid #164161; position:relative; padding: 7px; padding-left:25px; padding-right: 25px;font-size:16px;z-index:1;font-family:"微软雅黑";}
.VideoDisplay_a1_back a.more::before{content: ""; position: absolute; top: 0; left: 0; width: 0%; height: 100%; background:#164161;z-index: -1;
transition: 0.6s; -ms-transition: 0.6s; -webkit-transition: 0.6s; }
.VideoDisplay_a1_back a.more.on{background:#164161;color:#fff;}
@media screen and (min-width: 1024px) {
    .VideoList_a1 em:hover span{color: #007eb5;}
    .VideoList_a1 li:hover em::after{height: 64px;}
    .VideoList_a1 li:hover img{transform: scale(1.08) translate(-46%, -46%);-webkit-transform: scale(1.08) translate(-46%, -46%);-ms-transform: scale(1.08) translate(-46%, -46%);}
    .VideoDisplay_a1_back a.more:hover{color:#fff;}
    .VideoDisplay_a1_back a.more:hover::before{width:100%;}
}
@media screen and (max-width: 1024px) {
    .VideoList_a1 em{height: 21vw;}   
    .VideoList_a1 li{margin-bottom: 30px;}
    .VideoDisplay_a1_C iframe{height: 51vw;width: 100%;}
    .VideoDisplay_a1 h2{font-size: 3vw;}
}
@media screen and (max-width: 640px){
    .VideoList_a1 em {height: 32vw;}
    .VideoList_a1 li{display: block;float: left; width: 47.5%;margin: 0 1.25% 4vw 1.25%;}
    .VideoList_a1 li span{font-size: 3.8vw;line-height: 1.5;}
    .VideoDisplay_a1_back{font-size: 3.8vw;margin-top: 2vw;border-left: 3px solid #fecb09;padding: 1vw 0 1vw 3vw;line-height: 1.0; }
}