<!DOCTYPE html><html><head><meta charset="UTF-8"><meta name="viewport" content="width=device-width, initial-scale=1.0"><meta http-equiv="X-UA-Compatible" content="ie=edge"><title>Document</title><style>p{width: 100px;height: 100px;background-color: red;/* 外邊距 */margin-top: 30px;margin-left: 100px;margin-right: 100px;margin-bottom: 100px;/* 連寫 */margin: 40px;margin: 0 auto;/* 內邊距 pandding */padding: 30px;}</style></head><body><p>p第一個</p><p>p第二個</p></body></html>
運行效果如下：
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