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08 Css

• STEP 1：What is CSS?
  CSS stands for Cascading Style Sheets. Styles define how to display HTML elements. Styles are normally stored in Style Sheets. Styles were added to HTML 4.0 to solve a problem.
  
  STEP 2：CSS Syntax
  The CSS syntax is made up of three parts: a selector, a property and a value Styles define how to display HTML elements
  
  STEP 3：selector Syntax
  tag Selector
  class Selector
  id Selector
  
  STEP 4：CSS Pseudo-class
  
  STEP 5：CSS Properties
  (1)CSS Background Properties
  (2)CSS Text Properties
  (3)CSS Font Properties
  (4)CSS Units
  (5)CSS Border Properties (Box Model)
  (6)CSS Margin Properties (Box Model)
  (7)CSS Padding Properties (Box Model)
  (8)CSS Positioning Properties (Box Model)
  (9)CSS Classification Properties
  
  STEP 6：How to Insert a Style Sheet
  (1)External Style Sheet
  (2)Internal Style Sheet
  (3)Inline Styles
  
  STEP 7：The Web Site Was Validated