What is the usage of margin and padding?

Margin and Padding are properties in CSS used to set the space around elements.

Margin refers to the blank space between elements and their neighboring elements. It can be used to control the distance between elements. Margins can be set as a positive value, negative value, or percentage to adjust the position of elements. Positive values increase the distance between elements, while negative values decrease the distance.

Padding refers to the blank area between the content and the border of an element. It can be used to control the distance between the content and border of an element, and can be set as a positive value, negative value, or percentage to adjust the position of the element’s content. A positive value will increase the distance between the content and the border, while a negative value will decrease the distance.

In general, Margin is used to control the distance between elements, while Padding is used to control the distance between the content of an element and its border. Both can be set individually in four directions (top, right, bottom, left) or can be set to a single value to adjust the overall white space of an element.

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margin: 10px;  /* 上下左右都是10像素的外边距 */
margin: 10px 20px;  /* 上下是10像素的外边距，左右是20像素的外边距 */
margin: 10px 20px 30px 40px;  /* 上是10像素的外边距，右是20像素的外边距，下是30像素的外边距，左是40像素的外边距 */

padding: 10px;  /* 上下左右都是10像素的内边距 */
padding: 10px 20px;  /* 上下是10像素的内边距，左右是20像素的内边距 */
padding: 10px 20px 30px 40px;  /* 上是10像素的内边距，右是20像素的内边距，下是30像素的内边距，左是40像素的内边距 */

The specific usage of Margin and Padding will be set according to specific layout requirements, and can be directly set in CSS styles or through CSS class names.