/*=====方眼紙======*/
.box-003 {
    max-width: 920px;
    margin: 0 auto;
    padding: 1em 1.5em;
    box-shadow: 0 4px 4px rgb(0 0 0 / 5%), 0 2px 3px -2px rgb(0 0 0 / 1%);
    background-image: linear-gradient(transparent calc(100% - 1px), #e6edf3 50%, #e6edf3), linear-gradient(90deg, transparent calc(100% - 1px), #e6edf3 50%, #e6edf3);
    background-size: 15px 15px;
    background-repeat: repeat;
    background-color: #fcf4ff;
    color: #333333;
  }