@plone/volto/theme/themes/pastanaga/extras/sitemap.less

Volto

.section-sitemap {
  #page-sitemap {
    ul {
      line-height: 2.5em;
      list-style-type: none;
    }

    ul {
      li {
        font-weight: @bold;

        ul {
          li {
            font-weight: normal;
          }
        }
      }
    }

    li.with-children {
      font-weight: @bold;
    }
  }
}