老师，帮忙看下这样写是否可以，是否需要优化

来源：2-11 过渡效果实战课（3）

多盐少糖

2021-04-14 11:59:10

相关代码：

<!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>
        .outside {
            width: 650px;
            margin: 0 auto;
        }

        .background {
            width: 400px;
            height: 400px;
            border: 1px solid black;
            margin-bottom: 10px;
            border-radius: 50%;
            background-image: url(/过渡和动画源码/images/cat.jpg);
            background-size: 400px auto;
            perspective: 0;
        }

        .outside .background img {
            display: block;
            width: 400px;
            height: 400px;
            border: 1px solid black;
            border-radius: 50%;
        }

        .outside .one img {
            transform-origin: 0 0;
            transform: rotate(0deg);
            transition: transform 1s linear 0s;
        }

        .outside .one:hover img {
            transform: rotatey(-180deg);
        }

        .outside .two img {
            transform-origin: 50% 0;
            transform: rotate(0deg);
            transition: transform 1s linear 0s;
        }

        .outside .two:hover img {
            transform: rotatex(-180deg);
        }

        .outside .three img {
            transform-origin: 100% 0;
            transform: rotate(0deg);
            transition: transform 1s linear 0s;
        }

        .outside .three:hover img {
            transform: rotatey(180deg);
        }
    </style>
</head>

<body>
    <div class="outside">
        <div class="background one"><img src="/过渡和动画源码/images/dog.jpg" alt=""></div>
    </div>
    <div class="outside">
        <div class="background two"><img src="/过渡和动画源码/images/dog.jpg" alt=""></div>
    </div>
    <div class="outside">
        <div class="background three"><img src="/过渡和动画源码/images/dog.jpg" alt=""></div>
    </div>
</body>

</html>