.simple-menu-ul {
    display: flex;
    list-style: none;
}

.simple-menu-li {
    padding: 10px 20px;
    position: relative;
}

.simple-menu-li:hover {
    background-color: #eee;
    transition: background-color .3s ease;
}

.simple-menu-li:hover .simple-menu-ul-2 {
    display: block;
}

.simple-menu-a {
    text-decoration: none;
}

.simple-menu-ul-2 {
    list-style: none;
    display: none;
    position: absolute;
    left: 0;
    top: 44px;
    background-color: #ffffff;
}

.simple-menu-li-2:hover {
    background-color: #eee;
    transition: background-color .3s ease;
}

.simple-menu-a-2 {
    text-decoration: none;
    display: block;
    padding: 10px 20px;
}