simple-pop-banner.html

<style>
.over-bottom-banner {
	position: fixed;
	z-index: 3000;
	bottom: 10%;
	max-width: 1140px;
	margin: 0px auto;
	left: 1em;
	right: 1em;
	background: #191919;
	padding: 1em;
	text-align: center;
	color:#fff;
	font-size: 2em;
}
.over-bottom-banner.stay {
	position: relative;
	z-index: 1;
	margin: 0px;
	left: auto;
	right: auto;
	display: none;
}
</style>

<div class="over-bottom-banner">
	Texto de contenido
	<br>
	<a class="wpc-btn style-1 size-2" href="http://daracabados.com">¡Call to action!</a>
	<br>
	<a href="#close" class="text-white stay">Cerrar</a>
</div>

<script>
jQuery(document).ready(function($){ 
  if ( $( '.over-bottom-banner' ).length ) {
    $('.over-bottom-banner a.stay').on('click',function(){ 
      $('.over-bottom-banner').addClass('stay'); 
      $(this).css('display','none'); 
    }); 
  }
});
</script>