.font-up-open-big:before { 
    content: '\f077'; 
    font-family: FontAwesome;
} 



#back-top {
    display: block;
    background-color:#3b3e46af;
    right: 25px;
    width: 50px;
    height: 50px;
    bottom: 25px;
    position: fixed;
    z-index: 1000;
    text-align: center;
    cursor: pointer;
}


#back-top span i {
    font-style: normal;
	color:white;
    width: 16px;
    height: 20px;
    position: relative;
    top:  6px;
    bottom: 0;
    left: 0;
    right: 0;
    display: block;
    margin: auto;
    line-height: 1;
}

/*
#back-top span i {
	color:white;
    width: 16px;
    height: 20px;
    position: absolute;
    top: 0;
    bottom: 0;
    left: 0;
    right: 0;
    display: block;
    margin: auto;
    line-height: 1;
}
*/
 
#back-top span{
	display: block;
	width: 100%;
	font-size: 18px;
}
#back-top span div{
    color:white
}