.openclass-player{height:100%}.openclass-player .video-js{width:100%;height:100%}.openclass-player .video-js .vjs-big-play-button{top:calc(50% - 42px);left:50%}.openclass-player .dotting_time:hover .low_source{opacity:1;visibility:visible}.openclass-player .low_source{position:absolute;background:#fff;width:200px;bottom:20px;left:-100px;padding:15px;border-radius:4px;transition:.5s;opacity:0;visibility:hidden}.openclass-player .low_source>p{color:#000;font-size:12px;text-align:left}.openclass-player .low_source>img{width:100%;margin:5px 0}.openclass-player .low_source:after{content:"";width:0;height:0;border-width:12px 9px 0;border-style:solid;border-color:#fff transparent transparent;position:absolute;bottom:-12px;left:50%;margin-left:-6px}