section.content h1:before{
	content: url("../images/title_about.jpg");
}
section.content .img-set{
	background: transparent center center no-repeat;
	background-size: cover;
	border: #ccc 1px solid;
	display: block;
	height: calc(100vw - 47px);
	margin-bottom: 15px;
}
@media (min-width: 768px){
	section.content .img-set{
		height: 220px;
	}
}
@media (min-width: 992px){
	section.content .img-set{
		height: 293.33px;
	}
}
@media (min-width: 1200px){
	section.content .img-set{
		height: 360px;
	}
}