CSS is the abbreviation of Cascading Style Sheets, which means cascading style sheets. It is a language used to describe the style and layout of web pages. It can determine the font, color, size, position, arrangement and other attributes of elements in web pages, making web pages more beautiful, easy to read, and easy to use. CSS is not a programming language, but a style sheet language that can be used with HTML to achieve beautiful web design.
CSS can be divided into three types: inline styles, internal style sheets and external style sheets.
Inline styles are generally used to set the style of a tag individually and are declared in the style attribute of the tag.
The internal style sheet can be defined in the HTML file, usually written in the head tag and wrapped with the
