.goUpDown i {
	background: #fff;
	width: 40px;
	height: 40px;
	text-align: center;
	font-size: 33px;
	line-height: 40px;
	border-radius: 10px;
	border: 1px solid #000;
	cursor: pointer;
}
.goUpDown {
	position: fixed;
	right: 50px;
	bottom: 100px;
}