#cms1 section#bloc2{
    display: block;
}
section#bloc2{
    background: transparent;
    float: left;
    width: 100%;
    display: none;
    position: relative;
    margin-bottom: 20px;
}

.img-bc2{
	background: url(img/img-bc2.jpg)center no-repeat;
	width: 100%;
	display: block;
	position: relative;
	float: left;
	background-size: cover;
	height: 512px;
	margin-top: 20px;
}


@media (min-width: 320px) and (max-width: 767px) {
.img-bc2{
    height: 232px;
}

}
@media (min-width: 768px){
.img-bc2{
    height: 312px;
}
}
@media (min-width: 992px){
.img-bc2{
    height: 312px;
}
}
@media (min-width: 1200px){
.img-bc2{
    height: 382px;
}
}
@media (min-width: 1400px){
.img-bc2{
    height: 512px;
}
}
@media (min-width: 1700px){
.img-bc2{}
}