.hero-servicio {
  min-height: 80vh; /* ocupa 80% de la pantalla */
  background: linear-gradient(
      rgba(0,0,0,0.6), 
      rgba(0,0,0,0.6)
    ),
    url("/assets/img/portadas/portada09.png") center/cover no-repeat;
  padding: 4rem 1rem;
}