@media screen and (max-width: 520px){
  .article-detail .article-body {
    margin-bottom: 20px;
  }
  
  .article-detail .article-body iframe{
    max-width: 100%;
  }
}

@media screen and (max-width: 768px){
  .article-detail .article-body {
    margin-bottom: 20px;
  }
  
  .article-detail .title {
    font-size: 22px;
    line-height: 1.6em;
    font-weight: 500;
  }
  
  .article-detail .article-body h2 {
    margin-top: 60px;
    font-size: 20px;
    padding-bottom: 5px;
    border-bottom: solid 3px #808080;
  }

  .article-detail .article-body h3 {
    margin-top: 50px;
    font-size: 18px;
    padding-top: 0.25em;
    padding-bottom: 0.25em;
    padding-left: 0.5em;
    margin-right: 0.25em;
    width: 95%;
    color: #494949;
    background: transparent;
    border-left: solid 5px #808080;
  }
  
  .article-detail .article-body h4 {
    margin-top: 40px;
    position: relative;
    padding-left: 22px;
    width: 90%;
  }
 
  .article-detail .article-body h4::after {
      position: absolute;
      top: 50%;
      left:0;
      transform:translateY(-50%);
      content: '';
      width: 10px;
      height:10px;
      border: solid 4px #808080;
      border-radius:100%;
  }

  .article-detail .article-body p:not(:last-child) {
    margin: 0 0 20px;
    font-size: 15px;
    line-height: 1.87;
  }
  
  .article-detail .article-body img {
    border-radius: 1px;
  }
  
  .article-detail .article-body a {
    font-weight: 500;
  }
  
  .article-detail .article-body ul, .article-detail .article-body ol {
    background: #fcfcfc;
    padding: 0.5em 0.5em 0.5em 2em;
    border: solid 2px gray;
  }
  
  .article-detail .article-body ul li, .article-detail .article-body ol li {
    line-height: 1.5;
    padding: 0.5em 0;
  }
  
  .article-detail .article-body table {
    border: none;
  }
  
  .article-detail .article-body th {
    border: none;
  }
  
  .article-detail .article-body td {
    border: none;
  }
  
  .article-detail .article-body table img {
    height: 150px;
  }
}

@media screen and (min-width: 769px){
  .article-detail .article-body {
    margin-bottom: 30px;
  }
  
  .article-detail .title {
      font-size: 26px;
      line-height: 1.6em;
      font-weight: 500;
  }
  
  .article-detail .article-body h2 {
      margin-top: 60px;
      font-size: 22px;
      padding-bottom: 5px;
      border-bottom: solid 3px #808080;
  }

  .article-detail .article-body h3 {
      margin-top: 50px;
      font-size: 20px;
      padding-top: 0.25em;
      padding-bottom: 0.25em;
      padding-left: 0.5em;
      margin-right: 0.25em;
      width: 95%;
      color: #494949;
      background: transparent;
      border-left: solid 5px #808080;
  }

  .article-detail .article-body h4 {
      margin-top: 40px;
      position: relative;
      padding-left: 22px;
  }
 
  .article-detail .article-body h4::after {
       position: absolute;
       top: 50%;
       left:0;
       transform:translateY(-50%);
       content: '';
       width: 10px;
       height: 10px;
       border: solid 4px #808080;
       border-radius:100%;
  }

  .article-detail .article-body p:not(:last-child) {
      margin: 0 0 20px;
      font-size: 15.5px;
      line-height: 1.87;
  }
  
  .article-detail .article-body img {
      border-radius: 1px;
  }
  
  .article-detail .article-body a {
      font-weight: 500;
  }

  .article-detail .article-body ul, .article-detail .article-body ol {
    background: #fcfcfc;
    padding: 0.5em 0.5em 0.5em 2em;
    border: solid 2px gray;
  }
  
  .article-detail .article-body ul li, .article-detail .article-body ol li {
    line-height: 1.5; 
    padding: 0.5em 0; 
  }
  
  .article-detail .article-body table {
    width: 100%;
    height: 100px;
    border: none;
  }
  
  .article-detail .article-body th {
    border: none;
  }
  
  .article-detail .article-body td {
    border: none;
    height: 100px;
  }
}