.main-box{width:800px;height:600px;margin:10px auto;border:1px solid #c1c1c1}.studentOnly{position:relative;width:100vw;height:100vh;overflow:hidden}.studentOnly .student-box{height:94.44444vh}.studentOnly .rotate{position:absolute;width:100vh;height:100vw;-webkit-transform:rotate(90deg);transform:rotate(90deg);-webkit-transform-origin:left center;transform-origin:left center;left:50vw;top:-28vh}.studentOnly .icon-bofang{position:fixed;display:block;left:10px;bottom:10px;z-index:100;color:#fff;font-size:9.72222vh}