/*视频挂载*/

.iframe_video {
    position: relative;
    width: 100%;
}

@media only screen and (max-width: 767px) {
    .iframe_video {
        height: 15em;
    }
}

@media only screen and (min-width: 768px) and (max-width: 991px) {
    .iframe_video {
        height: 20em;
    }
}

@media only screen and (min-width: 992px) and (max-width: 1199px) {
    .iframe_video {
        height: 30em;
    }
}

@media only screen and (min-width: 1200px) {
    .iframe_video {
        height: 40em;
    }
}

.iframe_cross {
    position: relative;
    width: 100%;
    height: 0;
    padding-bottom: 75%
}

.iframe_cross iframe {
    position: absolute;
    width: 100%;
    height: 60%;
    left: 0;
    top: 0
}

/*盒子CSS*/
.embed-biliplayer {
    width: 100%;
    height: 60%;
}