@media screen and (max-width: 480px) {
  body {
    font-size: 14px;
    line-height: 1.6;
    word-break: break-word;
    overflow-wrap: break-word;
    white-space: normal;
  }

  /* 見出しに該当する要素すべてに対応 */
  h1, h2, h3,
  .headline, .見出し１, .section-title, .custom-heading,
  .srich-text h1, .srich-text h2 {
    font-size: clamp(24px, 6vw, 32px) !important;
    line-height: 1.4 !important;
    white-space: normal !important;
    word-break: break-word !important;
    overflow-wrap: break-word !important;
  }

  p, .srich-text p {
    font-size: 14px;
    line-height: 1.6;
  }

  button, a {
    font-size: 15px;
  }

  input, select, textarea {
    font-size: 14px;
  }
}