0 a piece of computer software that allows you to describe and control how a web page or a series of web pages should appear to the user -- 层叠样式表，级联样式表
Cascading style sheets give you the potential to not only add outstanding effects to your text, but to also set a content standard for text across an entire website.
You can use cascading style sheets, or CSS, to format each section and its contents.
A cascading style sheet is a simple mechanism for adding style to web documents, e.g. fonts, colours, spacing, and text direction.
These standards spell out exactly how the browsers are supposed to handle complicated layout instructions like cascading style sheets.
