Hello Joe,
I think it is possible to offset the child grouped with css only. However, I am not sure what exactly your case is and why you need a css solution for this. I suggest you give us more details on your scenario and we will try to find a solution using the OffsetX and OffsetY properties. If this is not possible, then we will move on to searching for css and/or javascript solution.
Let us know what you think.
All the best,
Peter
the Telerik team