editor/source/braft-editor/src/components/business/Headings/style.scss

.headings-dropdown{
  min-width: 110px;
  .menu{
    width: 200px;
    overflow: hidden;
    .menu-item {
      padding: 15px 20px;
      text-align: left;
      line-height: initial;
      h1,h2,h3,h4,h5,h6{
        margin: 0;
        padding: 0;
        color: inherit;
      }
      h1{
        font-size: 28px;
      }
      h2{
        font-size: 24px;
      }
      h3{
        font-size: 20px;
      }
      h4{
        font-size: 16px;
      }
      h5{
        font-size: 14px;
      }
      h6{
        font-size: 12px;
      }
    }
  }
}