.wrap690 {
  width: 690px;
  margin-left: auto;
  margin-right: auto;
}

.stamp_h3 {
  font-weight: bold;
  font-size: 1.5em;
  text-align: center;
  color: #009e41;
  line-height: 1.6;
  border-bottom: 1px solid #009e41;
}
.sample_img {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  justify-content: center;
  gap: 30px;
  figure {
    img {
      width: 100%;
      height: auto;
    }
    figcaption {
      text-align: center;
      font-weight: bold;
      font-size: 0.9em;
      margin-top: 5px;
    }
  }
}

@media screen and (max-width: 640px){
	.sample_img {
    grid-template-columns: min(100%, 300px);
    
  }


	
	
	
}