.bd .welcome{
	position:relative;
	height:70px;
	background-size:cover
}

.bd .welcome:before{
	position:absolute;
	z-index:0;
	content:'';
	top:0;
	left:0;
	right:0;
	bottom:0;
	opacity:.8;
	background:#000
}
.navbar{
	display: block;
	text-align: center;
	padding: 0.3rem 1.5rem;
}
.navbar-brand i{ 
		font-size: 1.4em;
}

@media screen and (min-width: 500px) {
	.navbar-brand i { 
		font-size: 2em;
	}
}

.btn{
	margin-top: 0.3rem;
	margin-bottom: 0.3rem;
}