外边距折叠: 即垂直方向上的两个外边距相遇时,会折叠成一个外边距,且折叠之后的外边距高度为两者之中较大的那一个。
示例:

代码:
DOCTYPE html>
<html>
<head>
<meta charset=utf-8>
<style type="text/css">
* {
margin: 0;
padding: 0;
}
.top{
width:100px;
height:100px;
margin:10px;
background-color: rgb(37, 35, 35);
}
.bottom{
width:100px;
height:100px;
margin:10px;
background-color: rgb(200, 90, 90);
}
style>
head>
<body>
<section class="top">section>
<section class="bottom">section>
body>
html>
样式:

代码:
DOCTYPE html>
<html>
<head>
<meta charset=utf-8>
<style type="text/css">
* {
margin: 0;
padding: 0;
}
.top{
width:100px;
height:100px;
margin:10px;
background-color: rgb(37, 35, 35);
display: inline-block /* 只为其中一个元素添加也可达到效果*/
}
.bottom{
width:100px;
height:100px;
margin:10px;
background-color: rgb(200, 90, 90);
display: inline-block
}
style>
head>
<body>
<section class="top">section>
<section class="bottom">section>
body>
html>
代码:
DOCTYPE html>
<html>
<head>
<meta charset=utf-8>
<style type="text/css">
* {
margin: 0;
padding: 0;
}
.top{
width:100px;
height:100px;
margin:10px;
background-color: rgb(37, 35, 35);
float: left; /* 两个元素都要添加*/
}
.bottom{
width:100px;
height:100px;
margin:10px;
background-color: rgb(200, 90, 90);
float: left; /* 两个元素都要添加*/
}
style>
head>
<body>
<section class="top">section>
<section class="bottom">section>
body>
html>
代码:
DOCTYPE html>
<html>
<head>
<meta charset=utf-8>
<style type="text/css">
* {
margin: 0;
padding: 0;
}
.top{
width:100px;
height:100px;
margin:10px;
background-color: rgb(37, 35, 35);
}
.bottom{
width:100px;
height:100px;
margin:10px;
background-color: rgb(200, 90, 90);
position: absolute; /* 只能给该元素添加*/
}
style>
head>
<body>
<section class="top">section>
<section class="bottom">section>
body>
html>