website/themes/sqrl-hexo-theme-doc/source/style/_swagger/swagger-ui-v2.scss

.hexo-swagger-ui-v2 {
  // "namespace" required vendors
  @import "./swagger-ui-v2-vendors";

  $font-size-small: 14px;
  $font-weight-big: 800;
  $font-weight-small: 300;

  .swagger-wrap.bootstrap {
    font-size: $font-size-small;
    font-weight: $font-weight-small;

    .api-infos-contact-url, li a {
      font-weight: $font-weight-small;
    }
    .content {
      margin-left: initial;
    }
    .endpoint-actions a {
      font-weight: $font-weight-small;
      font-size: $font-size-small;
    }
    .endpoint-heading a {
      font-weight: $font-weight-big;
    }

    .endpoint-heading >  li, .endpoint-actions > li {
      margin-bottom: 0;
    }

    .api-version .h4 {
      font-weight: $font-weight-big;
    }
  }
}