/*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: 100%;
    left: 0;
    top: 0
}

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

/*16:9 自适应播放器，避免 iframe 使用默认 300x150 小尺寸*/
.embed-biliplayer {
    position: relative;
    width: 100%;
    height: 0;
    padding-bottom: 56.25%;
    overflow: hidden;
    margin: 10px 0;
}

.embed-biliplayer iframe.iframe_video {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    border: 0;
}