.center-middle{position:absolute;top:50%;left:50%;transform:translate(-50%,-50%)}.position-center{position:absolute;left:50%;transform:translate(-50%)}.position-middle{position:absolute;top:50%;transform:translateY(-50%)}.text-justify{overflow:hidden;text-align:justify;-moz-text-align-last:justify;text-align-last:justify}.text-justify:after{position:relative;display:inline-block;content:"";width:100%}.layout-flex{display:-moz-flex;display:flex}.ellipsis{white-space:normal;overflow:hidden;text-overflow:ellipsis}@keyframes turn{0%{-webkit-transform:rotate(0deg)}25%{-webkit-transform:rotate(90deg)}50%{-webkit-transform:rotate(180deg)}75%{-webkit-transform:rotate(270deg)}to{-webkit-transform:rotate(1turn)}}#app{overflow:auto}body,html{min-width:0}body{background:#eee}.preview-video{height:100%}.preview-video .preview-video-content{margin:auto;width:650px}.preview-video .preview-video-content .video-item{margin-bottom:20px}.preview-video .preview-video-content .video-item .video-desc{margin-bottom:5px;word-wrap:break-word}.preview-video .preview-video-content .video-div{height:40vh}.preview-video .preview-video-content .video-div video{width:100%;height:100%}