h1, .h1 {
    font-size: 30px;
  }
  
  @media (max-width: 767px) {
    h1, .h1 {
      font-size: 26px;
    }
  }
  
  h2, .h2 {
    font-size: 24px;
  }
  
  @media (max-width: 767px) {
    h2, .h2 {
      font-size: 20px;
    }
  }
  
  h3, .h3 {
    font-size: 20px;
  }
  
  h4, .h4 {
    font-size: 18px;
  }
  
  h2 {
    padding: 0.4em 0.5em;/*文字の上下 左右の余白*/
    color: #494949;/*文字色*/
    background: #F0F8FF;/*背景色*/
    border-left: solid 5px #7db4e6;/*左線*/
    border-bottom: solid 3px #d7d7d7;/*下線*/
  }
  h3  {
    padding: 0.25em 0.5em;
    color: #494949;
    background: transparent;
    border-left: solid 5px #7db4e6;
  }

  code {
    font-size: 1em;
    color: #000000;
    background: linear-gradient(transparent 70%, #a7d6ff 70%);
  }

  blockquote {
    padding: 1em;
    padding-top: 20px;
    border: solid 1px #7db4e6;
    border-radius: 10px;/*角の丸み*/
  }