section_module
A structural wrapper that groups nested modules under a shared heading, with optional emphasis (color scope) and tone. The fundamental "this is a sub-section of the page" container — renders as a <section class="page-section section-group"> with its own anchor ID.
A canonical section
An optional intro paragraph below the heading. Sets up what the nested modules will cover.
A paragraph of nested prose. The h2 inside this text would cascade to h3 because of the section’s heading-level push.
Remember
A nested callout. The type-default heading “Remember” comes through because the callout has no title.