.return-top				{ right:20px; bottom:20px; position:fixed; z-index:9999; }
.btn-1					{ display: inline-block; background-color:#aaa;	border: none; color: #FFFFFF; text-align: center; padding: 10 20px; transition: all 0.5s; cursor: pointer; height:30px; 	border-radius:13px; }
.btn-1 span				{ cursor: pointer; display: inline-block; position: relative; transition: 0.5s; }
.btn-1:hover			{ background-color: #f4511e; }
.btn-1 span:after		{ content: '\2191'; position: absolute; opacity: 0; top: 0; right: -20px; transition: 0.5s; }
.btn-1:hover span		{ padding-right: 25px; }
.btn-1:hover span:after { opacity: 1; right: 0; }