.courseList .flex{display:flex}.courseList .avatar{width:100px;height:60px;-o-object-fit:contain;object-fit:contain}.courseList .detail-row{line-height:40px;margin-bottom:20px}.courseList .hidden-input{position:absolute;top:0;right:0;bottom:0;left:0;opacity:0;cursor:pointer}.courseList .img-del-button{position:absolute;top:0;left:80px}.courseList .intro-text{width:500px}.courseList .intro-pic{display:block;width:300px;height:200px;margin:0 auto}.courseList .intro-video{width:400px;height:200px;margin-left:50px}.courseList .intro-del{position:absolute;top:0;left:510px}.courseList .button-container{display:inline-block;position:relative;width:100px;height:40px;cursor:pointer}.courseList .link{color:#409eff;cursor:pointer}.courseList .relative{position:relative}.courseList .mask{position:fixed;top:0;left:0;width:100vw;height:100vh;background:rgba(0,0,0,.5);z-index:999999}.courseList .preview-video{width:calc(80vw - 40px)}