.go-top {
	position: fixed;
	width: 40px;
	height: 40px;
	background-color: red;
	cursor: pointer;
	bottom: 15px;
	right: 15px;
	border-radius: 50%;
	display: none;
	opacity: 0;
	padding-left: 10px;
	padding-top: 10px;
	z-index: 10;
	transition: .3s;
    box-sizing: border-box;
}
.go-top-enter {
	display: block;
	opacity: .5;
}
.go-top-enter:hover {
	opacity: 1;
	transition: 1s;
}

.arrow-up.icon {
	color: #fff;
	position: absolute;
	margin-left: 10px;
	margin-top: 3px;
	width: 1px;
	height: 16px;
	background-color: currentColor;
}
.arrow-up.icon:before {
	content: '';
	position: absolute;
	left: -5px;
	top: 1px;
	width: 10px;
	height: 10px;
	border-top: solid 1px currentColor;
	border-right: solid 1px currentColor;
	-webkit-transform: rotate(-45deg);
		transform: rotate(-45deg);
}