是否有一种无痛的方式来制作“css沙箱”？

By CSS sandbox I mean a section in my layout that have a completely independent look. I need this because some classes of mine need to output some "windows" of content in the layout, but I don't want the app's css to mess with them. They're mostly debug related, like printing var contents, benchmark graphs or displaying some error/exception.By CSS sandbox I mean a section in my layout th