I\'ve came across a problem with custom font i use for my website.
So i use following CSS for text.
font-family: \"Open Sans\",Helvetica,Arial;
font-wei
Unfortunately, there is no way to define fallback font specific styling using CSS alone.
As such you may want to attempt to work out the font being used, then apply a style as a result, see here for one method which works out the width resulting from applying a font to an element before 'best guessing' which it is.
That said, it is essentially a hack/workaround.
Otherwise, you could look into implementing a method to identify where the symbols are and then wrap them in styles span
tags, again this would be a fairly dirty hack as opposed to a clean solution.