I'm creating a html mail template, I used a ribbon so I need to a move it a little bit past border. you can see the code here: http://jsfiddle.net/GEqk7/
To do this first i used position: relative; and I gave the ribbons a negative position but the thing is that position is not well supported by gmail and yahoo and ... . So I decided to use negative margin but it looks like gmail and yahoo don't support that either.
is there a way or a fallback to to do this?
Most of the Email clients dont support negative margin. You will have to take that ribbon image as a background.
As of Jan. 2015, gmail's web client ignores negative margin.
来源：https://stackoverflow.com/questions/19714738/css-problems-with-negative-margin-in-mail-template