@charset "UTF-8";
body{
    background: whitesmoke;
}
.juzhong{
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
}
.login-form{
    background: #fff;
    border: 1px solid #ddd;
    max-width: 500px;
    padding: 20px 30px;
    padding-top: 0;
}