.loginContainer{background-clip:padding-box;width:90%;height:100%;margin-top:120px;margin-left:100px}.overall{position:absolute;content:" ";top:0;left:0;bottom:0;right:0;margin:0 auto;height:100%;width:100%;background-image:url(../img/xundao.964f7baf.jpg);background-size:cover}