Introduction

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). Documents • CSS3.0 中文参考手册: CSS3 Properties, attribute selectors • CSS 3 Cheat Sheet • CSS 3 Help Sheet • CSS Help Sheet • CSS 2.1 Specification • CSS 1.0 Specification