CSS를 통한 fade-in toTop

.qna .a {

opacity: 0; 
transform: translateY(100px); 
transition: all 1s; 
transition-timing-function: ease-out; 
transition-delay: 1s;

}

 

.qna[data-effect="show"] .a {

opacity: 1;

transform: translateY(0);

}