.container-portada {
  height: 750px;
  background: url(https://erp.com.gt/p/h/servicios/img/cajera-1.jpg);
  background-position: center center;
  background-size: cover;
  background-attachment: fixed;
  /* filter: grayscale(100%); */
}
.portada-gradiente {
  background: linear-gradient(to bottom, rgba(255,255,255,0) 10%, #000000);
}
.portada-descripcion {
}
.container-problemas {
  height: 775px;
  background: url(https://erp.com.gt/p/h/servicios/img/cajero-4.jpg);
  background-position: right center;
  background-size: cover;
  /* background-attachment: fixed; */
  /* filter: grayscale(100%); */
}
.problemas-gradiente {
  background: linear-gradient(to left, rgba(255,255,255,0) 10%, #000000);
}