Hello,
Then try the code below
.header-main-menu.et_element-top-level .menu > .current-menu-item > a:after,
.menu-items-underline .menu>li>a:hover:after {
border-top: 4px solid #b2f2f9;
content: "";
margin: 0 auto;
position: absolute;
left: 0;
right: 0;
bottom: 10px;
width: 95%;
z-index: -1;
}
.header-main-menu.et_element-top-level .menu > li > a {
z-index: 1;
}
.menu-items-underline .menu>li>a:before {
display:none;
}
Regards