https://img07.shop-pro.jp/PA01409/129/etc_base64/SU1HXzE2Mjk.jpeg?cmsp_timestamp=20230826121434

/* flier内の画像2枚を中央寄せ＋margin 2px */
.flier {
  display: flex;
  justify-content: center;
  flex-wrap: wrap;
}

.flier img {
  margin: 2px;
  box-shadow: 0 4px 9px rgba(0, 0, 0, 0.10);
  width: 48%;
}