page.twig

{% set page_content %}

  {# include page template #}
  {% include '@templates/page.twig' with {
    'page_title': title,
    'page_content': content
  } %}

{% endset %}

{# pass page_content to default page wrapper #}
{% include '@pages/_page-default.twig' with {
  'content': page_content
} %}