CSS Description

Cascading Style Sheets (English full name: Cascading Style Sheets) is a computer language used to represent the styles of files such as HTML (an application of the Standard Generalized Markup Language) or XML (a subset of the Standard Generalized Markup Language). CSS can not only statically modify web pages, but also dynamically format various elements of web pages in conjunction with various scripting Languages.

Cascading Style Sheets (Cascading Style Sheet, CSS) contribute to achieving responsible Web design. CSS has a significant impact on developers' construction of Web sites, and this impact may be endless. Removing most or even all of the presentation information of a web page from (X)HTML files and keeping them in a style sheet has many advantages, such as reducing file size, saving network bandwidth, and being easy to maintain. In addition, the separation of the presentation information and core content of the site enables the site's designers to make various modifications to the entire website in a short period of time.

CSS simplifies the format code of web pages. External style sheets are also cached by the browser, speeding up the download and display speed and reducing the amount of code that needs to be uploaded (because duplicate settings of the format will be saved only once). As long as the CSS style sheet file that saves the website format is modified, the style and characteristics of the entire site can be changed, which is particularly useful when modifying sites with a large number of pages. This avoids the modification of individual web pages and greatly reduces the workload.