I am unable to find the settings or page layout and style for the product pages ‘Accordion in content’ on your demo website. I have linked to this below. Are there any particular settings that need to be applied or pages that need to be imported to replicate this style and have the accordions in the content summary section and below the Add to Cart button and short description?
If you are trying to ask anything else then please provide some relevant screenshots of the specific area to check it myself and help you out accordingly.