#histoire {
	overflow: hidden;
}
.bg-image {
}
.bg-image img {
	position: absolute;
	width: 100%;
	margin: auto;
	z-index: -2;
	-webkit-mask-image: -webkit-gradient(linear, left bottom, left top, from(rgba(11,11,11, 1)), to(rgba(11,11,11, 0)));
	mask-image: linear-gradient(to top, rgba(11,11,11, 1), rgba(11,11,11, 0));
}