.dplayer{position:relative;display:block;width:100%;max-width:100%;min-height:320px;background:#000;line-height:1;overflow:hidden}.dplayer *{box-sizing:border-box}.dplayer video{display:block;width:100%;height:auto;background:#000}@media(max-width:640px){.dplayer{min-height:210px}}