.pagetop {
	width: 0;
	height: 0;
	font-size: 0;
	opacity: 0;
	transition-duration: 1s;
}

.pagetop.show {
	width: 80px;
	height: 60px;
	font-size: 20px;
	opacity: 0.6;
}
.pagetop:hover {
	opacity: 1 !important;
}