.gnb-item > a{
position: relative;
padding-bottom: 6px;
}
.gnb-item > a::after{
content: "";
position: absolute;
left: 50%;
bottom: 0;
width: 0;
height: 2px;
background: #111827;
transition: all .25s ease;
transform: translateX(-50%);
}
.gnb-item > a:hover::after,
.gnb-item.active > a::after{
width: 100%;
}
