.gotop {
 	position: fixed;
	bottom: 200px;
	right: 0;
	width: 40px;
	height: 40px;
	text-align: center;
	line-height: 40px;
	background-image: linear-gradient(to top, #f46c6c 0%, #f79577 100%);
	color:#FFF;
	cursor: pointer;
	z-index: 5;
	width: 0;
	align-content: 50% 0 0 50%;
	transition: all .3s ease;
	overflow: hidden;
	font-size: 30px;
}

.gotop_m {
   position: fixed;
	bottom: 20vw;
	right: 0;
	width: 40px;
	height: 40px;
	text-align: center;
	line-height: 40px;
	background-image: linear-gradient(to right, #173d7a 0%, #2f70b7 100%);
	color:#FFF;
	cursor: pointer;
	z-index: 5;
	width: 0;
	align-content: 50% 0 0 50%;
	transition: all .3s ease;
	overflow: hidden;
}