Definition of the number of parameters for Attribute padding in CSS

I have never understood the setting of the padding attribute value.

I can understand this.

For example:
Body {padding: 36px ;}
Body {padding: 36px 24px ;}

Body {padding: 36px 24px 18px ;}
Body {padding: 36px 24px 18px 12px ;}

I checked the standard CSS document, which is as follows:

 
If only one edge is provided, all four edges are used;
If two values are provided, the first value is used for top-bottom and the second value is used for left-right;

If three are provided, the first is used for the top, the second is used for the left-right, and the third is used for the bottom;
If all four parameter values are provided, the top-right-bottom-left parameters are added to the four sides.

body {padding: 36px ;}
// The patch margin of the four sides of the object is 36px
body {padding: 36px 24px;}
// The patch margin of the upper and lower sides is 36px, the patch margins on the left and right sides are 24px
body {padding: 36px 24px 18px;
}// the patch margins on the top and bottom are 36px and 18px respectively, the patch margin on both sides is 24px
body {padding: 36px
24px 18px 12px ;} // The top, right, bottom, and left patch margins are 36px, 24px, 18px, and 12px respectively.