Hi there, thanks for the additional information, most helpful.
I spoke with one of the Twenty Fourteen developers and it looks like the missing gap on pages with a featured image using the full-width template – like the page you pointed out in the demo – is actually a bug in the theme. Those pages should have the gap as well, to be consistent with the rest of the theme.
I filed a core bug ticket here:
https://core.trac.www.ads-software.com/ticket/26694
Anyway, the point is that the spacing is different on one page to that on another, which is not the desired result! I don’t mind which it is so long as it’s consistent.
I think it would make sense at this point – since it looks like this will at some point be changed in the theme – is to apply the gap to the specific type of page which is missing it.
Could you try adding this bit of custom CSS:
.page-template-page-templatesfull-width-php .post-thumbnail {
margin-top: 72px;
}
An easy way to add custom CSS like this is to install the Jetpack plugin and activate the Custom CSS module. You could also install a standalone custom CSS plugin, or create a child theme.
Going one of these routes will mean your CSS won’t be overwritten when you update the theme – though hopefully this particular issue will be fixed in the next version of Twenty Fourteen and you’ll no longer need the custom CSS. ??
Let me know if you have any questions or need further help with anything.