#banner {
    margin-top: 82px;
    position: relative;
    /*border: 1px solid brown;*/
}

#banner img {
    width: 100%;
}


@media (min-width:700px) {
    #banner .contenedor {
    	position: absolute;
    	top: 50%;
    	left: 50%;
    	transform: translateX(-50%) translateY(-50%);
    	/*border: 1px solid aqua;*/
    }
}