Almost all the latest version of the mainstream browser has a good support for CSS3 (in addition to IE), although IE for CSS3 support is bad, but the good news is IE9 will fully support HTML5 and CSS3, below with you share my understanding of the CSS3, interested members can refer to the following
CSS3 implements many of the previously needed effects (gradient borders, box shadows, real rounded corners, word shadows, multiple picture backgrounds, font transparency, etc.)
It also unifies some of the standard styles (text-overflow,word-wrap,opcity) and does not have to write a script for Firefox's consecutive English letter-folding questions.
Added new box model Border-box, Outline outline properties, added Columns property, simplified structure, @font-face property enables client to display server-side installed fonts.
Easy to complete the previously required through JS to achieve the function (through the selector can easily find the DOM element you want to find, resize properties)
CSS with media attributes can be more precise in different media types
Almost all the latest versions of the mainstream browsers have very good support for CSS3 (except IE), although IE has poor support for CSS3, but the good news is that IE9 will fully support HTML5 and CSS3