<!DOCTYPE html> <html lang="en"> <head> <meta charset="UTF-8"> <title>Title</title> <style> .inline-block { display: inline-block; background-color: grey; margin: 0 auto; width: 50%; height: 300px; text-align: center; } </style> </head> <body> <div class="inline-block"> <span>你好</span> </div> </body> </html>
