.cd-top {
    display: inline-block;
    height: 40px;
    width: 40px;
    position: fixed;
    bottom: 25px;
    right: 30px;
    
    /* image replacement properties */
    overflow: hidden;
    text-indent: 100%;
    white-space: nowrap;
    background: rgba(0, 0, 0, 0.8) url(http://www.jinglue.co/template/default/images/cd-top-arrow.svg) no-repeat center 50%;
    visibility: hidden;
    opacity: 0;
    -webkit-transition: all 0.3s;
    -moz-transition: all 0.3s;
    transition: all 0.3s;
    border-radius: 20px;
}

.cd-top.cd-is-visible {
    /* the button becomes visible */
    visibility: visible;
    opacity: 0.5;
}

.cd-top.cd-fade-out {
    
    opacity: 0.2;
}

.no-touch .cd-top:hover {
    background-color: #e86256;
    opacity: 1;
}

@media (max-width: 768px) {
    .cd-top {
        
        position:static;
        border-radius: 20px;
    }
}