说明：   CSS（Cascading Style Sheets) 中文翻译为 层叠样式表单，简称样式单。它是近几年才发展起来的新技术，1998年5月12日，Cascading Style Sheets,level 2 成为了W3C 的新标准。同时,”W3C CoreStyles "和CSS2 Validation Service" 以及“CSS Test Suite" 宣布成立。它是一组样式，样式中的属性在HTML元素中依次出现，并显示在浏览器中。样式可以定义在HTML文档的标志（TAG）里，也可以在外部附加文档作为外加文档。此时，一个样式表单可以作用于多个页面---甚至整个站点，因此具有更好的易用性和扩展性。我个人认为CSS好比是HTML语言的PLUSIN（插件），插件的功能大家应该知道，就是壮大原有的功能。你可以精确的控制主页里的每一个元素，比如一个字，用CSS你可以给它控制它的前景色、背景色、背景图片、在页面的精确位置，四周加入边框等。可以说CSS的功能是无比的强大。W3C 也极力向世界推广这一先进技术。
(CSS (Cascading Style Sheets) Cascading style sheets translated into Chinese, referred to a single style. It is only in recent years developed new technologies, May 12, 1998, Cascading Style Sheets, level 2 became a W3C s new standard. At the same time, "W3C CoreStyles" and CSS2 Validation Service "and" CSS Test Suite "announced. It is a style, the style attribute in HTML elements in order of appearance and display in your browser. Styles can be defined in the HTML document logo (TAG), the outside can also attach additional documentation as a document. At this point, a pattern form can act on multiple pages--- or even the whole site, it has better ease of use and scalability. I think like a HTML, CSS the PLUSIN (plug), plug-in features you should know that the original function of growth. You can control precisely where each page element, such as a word, you can use CSS to its control It is the foreground color, background color, background image, the exact location of the page, surroun)