"CSS3 Advanced Video Tutorial" This course was recorded by Beifeng.com. CSS3 is an upgraded version of CSS technology. CSS3 language development is developing towards modularization. The previous specification was too large and complex as a module, so it was broken down into smaller modules and more new modules were added. These modules include: box model, list module, hyperlink method, language module, background and border, text effects, multi-column layout, etc.