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- <!DOCTYPE html>
- <html lang="en">
- <head>
- <meta charset="UTF-8">
- <meta name="viewport" content="width=device-width, initial-scale=1.0">
- <title>Document</title>
- <style>
- div{
- width: 100px;
- height: 100px;
- background-color: red;
- /* 下外边距 */
- margin-bottom: 20px;
- /* 上外边距 */
- /* margin-top: 20px; */
- /* 左外边距 */
- /* margin-left: 20px; */
- /* 右外边距 */
- /* margin-right: 20px; */
- /* top left right bottom 同样适用于padding */
- }
- </style>
- </head>
- <body>
- <div>hello</div>
- <div>world</div>
- </body>
- </html>
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