CSS Series Tutorial--css file creation

Creation of CSS files:
1. External style sheet:
<link rel= "stylesheet" type= "Text/css" href= "Mystyle.css"/>
Note: Rel must be specified, otherwise the style sheet cannot be recognized, and the type of the file is best specified.
2. Internal style sheet:
<style type= "Text/css" >
hr {Color:sienna;}
p {margin-left:20px;}
</style>
Note: type can be omitted, suggested plus
3. Inline style sheet
<p style= "Color:sienna; margin-left:20px ">
This is a paragraph
</p>
Note: Inline style sheets take precedence over outside chains and internal style sheets, so inline style sheets override other style comparison definitions.
Of course, if it is through the JS control of the properties, it is another matter.

CSS Series Tutorial--css file creation