Board Thread:Support Requests - Designing Your Wikia/@comment-25057323-20140625084120/@comment-4018164-20140625123737

It seems like all anouncements are placed inside the box. By styled border, if you refer to different border styles, you can use the border-style property, or replace solid with a valid border style.

As for a single class for the border- it is not possible using the style="" attribute by itself, but you can reduce it to 2 layers: the first layer is a div with a border (the "outer" border), a background which is the "middle" border, and a padding. The second "layer" would be another div (or table), with a border which will be the "inner" border.

Or perhaps, what you are trying to do is to replace the styling with content for your MediaWiki:Wikia.css? I apologize if i misunderstood what you're trying to achive.

As for negative border- that cannot be applied. But you could use elements with a relative positioning that cover the corners, to get an "inverted" border radius.