.container{
	position: relative;
	width: 100%;
	height: 29.05rem;
	background-image: url(../img/bg.jpg);
}
.down{
	position: absolute;
	top: 13.18rem;
	left: 50%;
	width: 4.75rem;
	height: 2.18rem;
	transform: translateX(-50%);
	background-image: url(../img/btn.png);
}