*{
	margin: 0;
	padding: 0;
	box-sizing: border-box;
}
.slider-marca{
	height: 900px;
	animation: slider-marca 40s infinite linear alternate;
	background-size: 100% 100%;
	position: relative;
	display: flex;
	justify-content: center;
	align-items: center;
	
}
@keyframes slider-marca{
	0%, 10%{
		background-image: url("../img/inicio/3.png");
	}
	25%, 45%{
		background-image: url("../img/inicio/44.png");
	}
	50%, 70%{
		background-image: url("../img/inicio/11.png");
	}
	75%, 100%{
		background-image: url("../img/inicio/33.png");
	}
}
@media screen and (max-width:768px){
     .slider-marca{
          height: 400px;
     }
}
@media screen and (max-width:400px){
     .slider-marca{
          height: 300px;
     }
}