> For the complete documentation index, see [llms.txt](https://iexam.gitbook.io/fcc/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://iexam.gitbook.io/fcc/ji-chu/123.md).

# Add Different Margins to Each Side of an Element

说明：

```
有时你想要自定义元素，使它的每一个边具有不同的 margin。

CSS 允许你使用 margin-top、margin-right、margin-bottom 和 margin-left 来控制元素上右下左四个方向的 margin。

使你的绿方块的顶部和左侧具有 40px 的 margin，而底部和右侧则是 20px。
```

原始代码：

```
<style>
  .injected-text {
    margin-bottom: -25px;
    text-align: center;
  }

  .box {
    border-style: solid;
    border-color: black;
    border-width: 5px;
    text-align: center;
  }

  .yellow-box {
    background-color: yellow;
    padding: 10px;
  }

  .red-box {
    background-color: red;
    margin-top: 40px;
    margin-right: 20px;
    margin-bottom: 20px;
    margin-left: 40px;
  }

  .green-box {
    background-color: green;
  }
</style>
<h5 class="injected-text">margin</h5>

<div class="box yellow-box">
  <h5 class="box red-box">padding</h5>
  <h5 class="box green-box">padding</h5>
</div>
```

调试代码：

```
<style>
  .injected-text {
    margin-bottom: -25px;
    text-align: center;
  }

  .box {
    border-style: solid;
    border-color: black;
    border-width: 5px;
    text-align: center;
  }

  .yellow-box {
    background-color: yellow;
    padding: 10px;
  }

  .red-box {
    background-color: red;
    margin-top: 40px;
    margin-right: 20px;
    margin-bottom: 20px;
    margin-left: 40px;
  }

  .green-box {
    background-color: green;
    margin-top:40px;
    margin-left:40px;
    margin-bottom:20px;
    margin-right:20px;
  }
</style>
<h5 class="injected-text">margin</h5>

<div class="box yellow-box">
  <h5 class="box red-box">padding</h5>
  <h5 class="box green-box">padding</h5>
</div>
```