#welcome_1 {
	width: 100%;
	height: 100vh;
	background: url("../img/fond.jpg") top center;
	background-size: cover;
	position: relative;
	color: white;
	background-attachment: fixed;
	text-shadow: 0 0 6px black;
}
#welcome_1:before {
	content: "";
	/*background: rgba(0, 0, 0, 0.6);*/
	position: absolute;
	bottom: 0;
	top: 0;
	left: 0;
	right: 0;
}

@media (max-width: 768px) {
	#welcome_1 {
		height: auto;
	}
	#welcome_1 h1 {
		font-size: 28px;
		line-height: 36px;
	}
	#welcome_1 h2 {
		font-size: 20px;
		line-height: 24px;
	}
}