.meu-login{
    background: url('http://www.jclitoralseguros.com.br/sistema/img/fundo.png') no-repeat center center fixed !important; 
    -webkit-background-size: cover  !important;
    -moz-background-size: cover  !important;
    -o-background-size: cover  !important;
    background-size: cover  !important;
}