.custom_block.custom_block_crop-image .couverture{
	background-position: center center;
	-webkit-background-size: cover; /* pour Chrome et Safari */
	-moz-background-size: cover; /* pour Firefox */
	-o-background-size: cover; /* pour Opera */
	background-size: cover; /* version standardisée */
	width:100%;
	height:200px;
	display: block;
}

/* unsemantic mobil- */
@media screen and (max-width: 767px) {
	
}
/* unsemantic tablet- */
@media screen and (min-width: 768px) and (max-width: 1024px) {

}
/* unsemantic screen */
@media screen and (min-width: 1025px) {
	
}