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0px;font-weight:bold;font-size:12px;color:#fff;text-align:center;line-height:19px;position:absolute;right:30px;top:0}.preview-course-mask{position:absolute;top:0;left:0;width:100%;height:200px;background:rgba(0,0,0,.4);display:flex;flex-direction:column;align-items:center;justify-content:center;font-weight:bold;font-size:16px;color:#fff;line-height:22px;cursor:pointer}.preview-icon{width:40px;height:40px;margin-bottom:8px}