<!DOCTYPE html> <html lang="en"> <head> <meta charset="UTF-8"> <meta http-equiv="X-UA-Compatible" content="IE=edge"> <meta name="viewport" content="width=device-width, initial-scale=1.0"> <title>Document</title> <style> .box{ position: relative; width: 300px; height: 300px; margin: 100px auto; font-size: 40px; line-height: 300px; text-align: center; color: #fff; transition: all 1s; transform-style: preserve-3d; } .box:hover{ transform: rotateY(180deg); } .front,.back{ position: absolute; top: 0; left: 0; width: 100%; height: 100%; border-radius: 50%; } .front{ background-color: palegoldenrod; z-index: 1; } .back{ background-color: peru; transform: rotateY(180deg); } </style> </head> <body> <div class="box"> <div class="front">front</div> <div class="back">back</div> </div> </body> </html>