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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>
- .box1{
- width: 100px;
- height: 100px;
- background-color:red;
- /* margin:10px; */
- /* margin-bottom: 10px;
- margin-top:10px;
- margin-left: 10px;
- margin-right: 10px; */
- /* 外边距 上 右 下 左 */
- margin:10px 10px 10px 10px;
- /* 内边距 */
- padding:10px;
- }
- body{
- /* margin 代表外边距 */
- margin:0;
- }
- </style>
- </head>
- <body>
- <div class="box1">1</div>
- <div>hello</div>
- </body>
- </html>
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