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How do css layouts work? How to link CSS files: Anshan skin disease Hospital Www.0412pfk.net

1. Additional links: external CSS files

2. Import CSS: When multiple CSS files are used, import multiple CSS into one CSS file

There are three types of CSS rules defined

1, classes such as ". Redtext ",". Bluetext "and". BigText "Wait.

2, the label for the original HTML tags to do the re-CSS definition

3. Advanced pseudo-class, element with ID defined, and comprehensive definition

Application of CSS Rules

1, only "class" style needs to be applied, class= "XXXX". Any element can apply a class. Anshan first big Dermatosis hospital www.0412pfk.net

2. The difference between class and ID

3, the label application generally for the "body" label one-time use, for such as "Li", "TD" and so on the page of large repetition of the label is not recommended definition.

4, advanced multi-use, the definition of "#id li" than the definition of "Li" is much better.

The order in which CSS rules are executed

1, according to the implementation of CSS Code order

2. If there are duplicate rules, follow the definition after execution

3, the final rule is a combination of multiple definition rules

Focus: Advanced Rule definitions

1, for the different table text style definition. (Different tables use different IDs, use class style definitions)

2. Multiple hyperlink style definitions in one page

3, multiple same rules different objects of CSS common definition

4. Consider what is more scientific (extensibility and Code simplification) for multiple CSS methods defined by the same object

DIV css\ makes search engine spiders no longer tired