本手册针对的是已有一定网页设计制作经验的读者。其目的是提供最新最全的样式表内容的快速索引及注释。所以对于样式表的基础知识-This manual is aimed at the production of a certain web page design experience of readers. Its purpose is to provide the latest and most wide style sheet content rapid indexing and Notes. Therefore, style sheets for the basic knowledge