Placeholder; followup of T326665

Scope includes last 2 bullet points of T326665#8905947:

Other demos in the page should include:

• Customizable label's text style (customize with one of our text tokens, e.g. Heading L 24/30 used in the Minerva's Wikipedia article)
• Represent other body content within the accordion (e.g. an image, a combination of form items, etc.)