ul {
    margin: 0 0;
    padding: 0 0;
}

li {
    margin: 0 0;
    padding: 0 0;

    text-decoration: none;
    list-style: none;
}

.image-li {
    display: flex;
    justify-content: center;
    align-items: center;
}

.tip-image-div:hover .drop-list {
    display: block;
}

.drop-list {
    display: none;
}