@media screen and (max-width: 768px) {
  .article_heading {
    margin-bottom: 50px;
  }

  .main_text {
    text-align: left;
    letter-spacing: 0.59px;
    width: 91%;
    margin: 0 auto;
  }

  .figure_structure {
    width: 92%;
    margin: 24px auto 30px;
  }

  .img_structure {
    width: 100%;
  }

  .appendix {
    font-size: 16px;
  }

  .appendix .appendix-link {
    margin-top: 10px;
    font-size: 18px;
  }
}