.portada{
    background: url('vistas/img/plantilla/admire-fondo_blanco.png') no-repeat fixed center;
    -webkit-background-size: cover;
    -moz-background-size: cover;
    -o-background-size: cover;
    background-size: cover;
    height: 100%;
    width: 100% ;
    text-align: center;
}

.body-admire {
  background-image: url('vistas/img/plantilla/admire-fondo_blanco.png');
  background-repeat: no-repeat;
  background-attachment: fixed;
  background-size: 100% 100%;
}