#margin-bottom
Defines the space outside the element, on the bottom side.
默认属性
margin-bottom: 0;
Removes any margin at the bottom.
margin-bottom: 30px;
You can use pixel values.
margin-bottom: 2em;
You can use (r)em values.
The value is relative to the font size:
- em: relative to the element's current font size
- rem: relative to
<html>
the root element's font size
margin-bottom: 10%;
You can use percentage values.
The percentage is based on the width of the container.