Any idea why the suits all render as smiley faces in Chrome/Mac?

Inspecting the cards, you can see that they are using the unicode character for spade/heart/etc. But in the browser itself you get nothing but smileys.

Perhaps the font they're using doesn't have those code points?

Edit: Yes, that's the case. Font is not specified, so it comes in as "inherit" by default, using whatever the browser feels like. On Mac Chrome, that must use smileys to represent unknown characters. Switching the document font to Arial in CSS fixes the issue and makes the cards look like cards.