.banner-ex1 { height:635px; display:block; float:left; width:100%; position:relative; background-size:cover; }
	.banner-ex1 h1 { position:absolute; top:230px; width:100%; text-align:center; color:#fff; font-size:50px; font-weight:600; }
	.banner-ex1 .btn { top:370px; left:0; right:0; margin:0 auto; position:relative; }
	
	
	
@media only screen and (max-width: 1439px) {
	.banner-ex1 { height:475px; }
	.banner-ex1 h1 { top:130px; }
	.banner-ex1 .btn { top:280px; }
}