.video-box {position: fixed;z-index:9999;top:0;left:0;width: 100%;height: 100%;display: flex;align-items: center;}
.video-box .bg {position: absolute;top:0;left:0;width: 100%;height: 100%;background: rgba(0,0,0,.8)}
.video-box .video-cont  {width: 70%;margin: 0 auto;display:block;}
.video-box video {width: 100%;}
.video-box .video-cont {position: relative;}
.video-box .del {display: block; width: 30px;height:30px;border:1px solid #ffffff;border-radius:100%;font-size: 22px;text-align:center;line-height: 30px;cursor:pointer;color:#ffffff;float:right;}

@media screen and (max-width:960px) {
.video-box .video-cont  {width: 90%;}

}