.banner-container {
	max-width: 1900px;
	margin: auto;
  overflow: hidden;
	position: relative;
}
.banner-container:before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
	background: rgba(0,0,0,0.5);
}
.grupo-banner {
  position: relative;
  z-index: -1000;
}
.slider {
  margin: auto;
  overflow: hidden;
}
.slider ul {
  display: flex;
  padding: 0;
  width: 400%;
  animation: cambio 20s infinite alternate ease-out;
}
.slider li {
	background: #fff;
  position: relative;
  list-style: none;
}
.slider img {
  width: 100%;
	margin: auto;
  height: 360px;
	object-fit: cover;
}
.mensaje-banner {
font-family: 'Open Sans', sans-serif;
  max-width: 1400px;
  margin: auto;
  
	position: absolute;
	top: 50%;
	left: 50%;
	transform: translateX(-50%) translateY(-50%);
	width: 100%;
	color: #fff;
	text-align: center;
}

@keyframes cambio {
  0% {margin-left: 0;}
  20% {margin-left: 0;}
  
  25% {margin-left: -100%;}
  45% {margin-left: -100%;}
  
  50% {margin-left: -200%;}
  70% {margin-left: -200%;}
  
  75% {margin-left: -300%;}
  100% {margin-left: -300%;}
}
/*ESTILOS RESPONSIVE WEB DESIGN*/
@media (min-width: 450px) {

}
@media (min-width: 768px) {
.slider img {
  height: 750px;
}
  .mensaje-banner {
    font-size: 3.4em;
  }
}