.hero-nosotros {
  width: 100%;
  background-image: url(/images/about.webp);
  background-size: cover;
  background-position: center;
  background-attachment: scroll;
  margin-bottom: 20px; 
  position: relative;
  z-index: 1;
}

.margin {
  width: 100%;
  max-width: 1280px;
  margin: 0 auto;
  padding: 0 20px;
}

.contenedor-texto {
  display: flex;
  justify-content: center;
  align-items: center;
  flex-direction: column;
  height: 40vh;
  padding: 20px;
  color: white;
  text-align: center;
  z-index: 1;
}

.contenedor-texto h2 {
  font-size: 24px;
  text-transform: uppercase;
  font-weight: 800;
  text-shadow: 2px 2px 5px rgba(0, 0, 0, 0.5);
}

@media (min-width: 768px) {
  .hero-nosotros {
    background-attachment: fixed;
  }

  .contenedor-texto {
    height: 70vh;
    padding: 0;
  }

  .contenedor-texto h2 {
    font-size: 45px;
  }
}