【文件属性】：
文件名称：CSS 2.1 Specification
文件大小：1.54MB
文件格式：PDF
更新时间：2016-11-03 16:30:06
CSS 2.1
This specification defines Cascading Style Sheets, level 2 revision 1 (CSS 2.1).
CSS 2.1 is a style sheet language that allows authors and users to attach style (e.g.,
fonts and spacing) to structured documents (e.g., HTML documents and XML applications).
By separating the presentation style of documents from the content of
documents, CSS 2.1 simplifies Web authoring and site maintenance.