.preview{display:flex;align-items:center;justify-content:center;position:fixed;top:0;left:0;width:100vw;height:100vh;background-color:rgba(0,0,0,.3);z-index:999999}.preview .preview-close{position:absolute;top:30px;right:30px;width:50px;height:50px;font-size:50px;color:#fff}.preview .preview-vodeo{width:80vw;background-color:#000}.question-reply{overflow:hidden;text-overflow:ellipsis;display:-webkit-box;-webkit-line-clamp:3;-webkit-box-orient:vertical}.file-list{display:flex;flex-flow:row wrap;margin-top:20px}.file-list .file-item{position:relative;margin:0 10px 10px}.file-list .file-item,.file-list .file-item .file{width:150px;height:100px}