<!DOCTYPE html> <html> <head> <meta charset="utf-8"> <title>菜鸟教程(runoob.com)</title> <style> div { width:100px; height:100px; border:1px solid black; position: absolute; top: 50%; left: 50%; transform: translate(-50%,-50%); /* Rotate div */ } </style> </head> <body> <div>Hello</div> </body> </html>
原文：https://www.cnblogs.com/zwk-It-goodmorning/p/12162742.html