#main ul.category-list {
    padding: 10px 5px 5px 10px;
    background: #F4F4F4;
    display: flex;
    flex-wrap: wrap;
}
#main ul.category-list li {
    width: 19%;
    margin: 0 1% 1% 0;
    padding: 0;
}
#main ul.category-list li a {
    padding: 10px 5px 10px 20px;
    text-align: left;
    font-weight: bold;
    color: #004C93;
    font-size: 12px;
    background: #E6EEF7 url(https://img21.shop-pro.jp/PA01431/561/etc/bg-sidecategory.png) left 5px center no-repeat;
    display: block;
}