<!DOCTYPE html> <html> <head> <meta charset="utf-8" /> <meta name="viewport" content="width=device-width, initial-scale=1"> <title>我是中国人</title> <style> /* 子元素选择器 */ div > p { background-color: red; } </style> </head> <body> <div> <p>这是个段落标签</p> <h1>这是个标题标签</h1> <ul> <li> <p>北京</p> </li> <li>上海</li> <li>广州</li> </ul> </div> </body> </html>
