#header {
	float: left;
	width:90rem;
	height:39rem;
	background-color: #000;
	overflow: hidden;
}

@media (min-width: 900px) { 
	#header {
		float: left;
		width:160rem;
		height:70rem;
		background-color: #000;
	}
}
#site_logo {
	position: absolute;
	width: 60.2rem;
	height:22.4rem;
	top:20rem;
	left:5rem;
}

#header_btn {
	position: absolute;
	width: 60rem;
	top:32rem;
	left:15rem;
	color:#fff;
	font-size: 3.5rem;
	line-height: 7rem;
	text-align: center;
	cursor: pointer;
}

@media (min-width: 900px) { 
	#header_btn {
		position: absolute;
		width: 60rem;
		top:62rem;
		left:50rem;
		color:#fff;
		font-size: 5rem;
		line-height: 7rem;
		text-align: center;
		cursor: pointer;
	}
}
#header_holder {
	position:relative;
}

#header_anim {
	position:absolute;
}

.header_anim {
	position: absolute;
	width:90rem;
	height:39rem;
}

@media (min-width: 900px) { 
	.header_anim {
		position: absolute;
		width:160rem;
		height:70rem;
	}
}


.header_anim img{
	width:100%;
	height:auto;
}