.more_btn{position:relative;z-index:999;float:right;clear:both;padding:0 35px;white-space:nowrap;cursor:pointer;height:20px;line-height:20px;border-radius:18px;background-color:#fff;color:#8d0d1e;font-size:14px;text-align:center;margin-left:5px}.course_desc{position:relative;overflow:hidden;text-overflow:ellipsis;line-height:1.5;font-size:16px;user-select:none}.course_desc:after{content:"";width:999vw;height:999vw;background:#fff;position:absolute;z-index:997;margin-top:0}