.login_box{background-color:#fff;height:100vh;overflow:hidden;position:relative;width:100vw}.login_box:after{background:#f7f8fe;border-radius:50%;content:"";height:2676px;left:73px;position:absolute;top:-105px;width:2676px;z-index:1}@media (max-width:640px){.login_box{height:auto;min-height:100vh;padding-bottom:60px}}