What does the box model use to set the inner border?

Padding in the box model can be set using the `padding` attribute or the `padding-top`, `padding-right`, `padding-bottom` and `padding-left` properties. Detailed introduction: 1. The `padding` attribute can accept one or more values ​​and is used to set the size of the top, right, bottom and left margins respectively; 2. `padding-top`, `padding-right`, etc.

The operating system for this tutorial: Windows 10 system, DELL G3 computer.

The box model is an important concept in CSS, used to describe the layout and size of HTML elements. It treats each HTML element as a rectangular box, including content area, padding, borders and margins. In the box model, padding refers to the empty space between the content area and the border, which is used to control the spacing inside the element and the distance between the border.

In CSS, you can use the `padding` attribute to set the padding of an element. The `padding` attribute can accept one or more values ​​to set the size of the top, right, bottom and left margins respectively. If only one value is specified, it will be applied to all four margins. If you specify two values, the first value applies to the top and bottom margins, and the second value applies to the left and right margins. If three values ​​are specified, the first value applies to the top margin, the second value applies to the left and right margins, and the third value applies to the bottom margin. If four values ​​are specified, they apply to the top, right, bottom, and left margins respectively.

For example, if you want to set the top margin of an element to 10 pixels, the right margin to 20 pixels, the bottom margin to 30 pixels, and the left margin to 40 pixels, you can use the following CSS code:

.element {
padding: 10px 20px 30px 40px;
}

In addition, you can also use the `padding-top`, `padding-right`, `padding-bottom` and `padding-left` properties to set the size of the top, right, bottom and left margins respectively. These properties can accept a length value (such as pixels, percentage, etc.) or keywords (such as `auto`, `inherit`, etc.).

In addition to setting fixed pixel values, you can also use percentage values ​​to set padding. The percentage value is calculated relative to the width of the parent element. For example, if you set an element's padding to 10%, the size of the padding will be 10% of the parent element's width.

In addition, you can also use the `inherit` keyword to set the padding of an element to the same value as its parent element. This is useful for creating multiple elements with the same padding.

To summarize, padding in the box model can be set using the `padding` attribute or the `padding-top`, `padding-right`, `padding-bottom` and `padding-left` properties. The size of the padding can be specified using pixel values, percentage values, or keywords. By properly setting the inner margins, you can control the spacing of elements and the distance between borders, thereby achieving better page layout effects. .

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