.intro{
    position: absolute;
    left: 50%;
    margin-left: -500px;
    width: 1000px;
    top:20px;
}
.login{
    position:absolute;
    left:50%;
    top:250px;
    width:200px;
    height:300px;
    margin-left:-150px;
    text-align:center;
}