中心登录页面但未登录页面

试试这个:

CSS

.loginform, .registrationform, .forgotpasswordform, .passwordsetform {
    left: 50%;
    position: relative;
    transform: translateX(-50%);
    width: 480px;
}

或

.loginform, .registrationform, .forgotpasswordform, .passwordsetform {
    width: 480px;
    margin: 0 auto;
}

如果你想居中的标题，添加一个类:

CSS

h1.login-title{
text-align:center;
}

<h1 class="login-title">Customer Support Portal - Login</h1>

#wrap{
    width: 480px;
    margin: o auto;
}

.emailbox{
    width: 209px;
    margin: 0 auto;
}

#footer{
    text-align: center;
}