.gallery-index ul {
    list-style-type: none;
    padding: 0;
}

.gallery-index ul li {
    display: inline-block;
    margin-bottom: 20px;
    text-align: center;
}

.gallery-index ul li a img {
    display: block;
}

.sub-content ul {
    list-style-type: none;
}

.sub-content ul li {
    display: inline-block;
    margin: 10px 10px;
    vertical-align: middle;
}

.sub-content ul li a img {
    display: block;
}