代码

后台

#cnblogs_post_body .video {    height: 0;    padding-bottom: 56.25%;    /* 16:9 */    position: relative;    width: 100%;}#cnblogs_post_body .video iframe,#cnblogs_post_body .video video{    position: absolute;    left: 0;    top: 0;    width: 100%;    height: 100%;}