Learn the basic CSS knowledge of standard webpage creation technology

Style selector
Property selector p {color: red ;}
Class selector. p {color: red ;}
ID selector # p {color: red ;}
II. transparent
Background: transparent; prevent definition Background from being overwritten
3. Transparent background understanding of Netscape4.X (IE/windows or earlier) errors
Background: inhrit; the transparent Background in netscape4.x will be understood as black-green
4. Default font selection:
Body {font-family: "lucida Grande", Verdana, Lucida, Arial, Helvetica, sans-serif ;}
Call the default fonts of different platforms in sequence
5. How to solve the problem that the old browser does not support CSS?
Use group selector such as p, td, ul, ol, li, dl, dt, dd {font-size: small ;}
VI. Use netscape4 friendly rules
Body {font-family: Verdana, sans-serif ;}
P, td, ul, ol, li, dl, dt, dd {font-size: small ;}
7. Detailed rules for Method overloading:
Body {font-family: Verdana, sans-serif ;}
P, td, ul, ol, li, dl, dt, dd {font-size: small ;}
P {font-family: times, "Times New Roman", serif ;}
8. Content (derived) selector
Li strong {font-style: italic; font-weight: normal}
Example: strong {color: red;} h2 {color: red;} strong h2 {color: blue ;}
Example: # sidebar {color: red} # sidebar p {color: blue ;}
Example:. fancy {color: red;}. fancy p {color: blue;}/li. fancy {color: black ;}