.gotop {
   position: fixed;
	bottom: 120px;
	right: 0;
	width: 40px;
	height: 40px;
	text-align: center;
	line-height: 40px;
	background-image: linear-gradient(to right, #3f5d85 0%, #c6d3e4 100%);
	color:#FFF;
	cursor: pointer;
	z-index: 511;
	width: 0;
	align-content: 50% 0 0 50%;
	transition: all .3s ease;
	overflow: hidden;
}

.gotop_m {
   position: fixed;
	bottom: 20vw;
	right: 0;
	width: 40px;
	height: 40px;
	text-align: center;
	line-height: 40px;
	background-image: linear-gradient(to right, #ff0000 0%, #ae1f24 100%);
	color:#FFF;
	cursor: pointer;
	z-index: 51;
	width: 0;
	align-content: 50% 0 0 50%;
	transition: all .3s ease;
	overflow: hidden;
}