.un_ex01_cardUnit {
box-sizing: border-box;
  display: flex;
  flex-wrap: wrap;
}

.un_ex01_card {
  width: calc((100% + 20px) / 2 - 20px);
  display: flex;
  flex-direction: column;
  justify-content: flex-start;
}

.un_ex01_card:nth-child(2n){
margin-left: 20px;
}

.un_ex01_card:nth-child(n+3){
margin-top: 20px;
}
.un_ex01_card img{
width: 100%;
}
.un_ex01_card .un_ex01_card_txt{
background-color: var(--secondBgColor);
box-sizing: border-box;
padding:10px;
}