<!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> p{ display: none; } .box:hover p{ display: block; } </style> </head> <body> <div class="box"> 显示 <p>这是一个段落</p> </div> </body> </html>
