过渡效果失效

<!DOCTYPE html>
<html lang="en">

<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0, maximum-scale=1.0, user-scalable=0,minimal-ui:ios">
    <meta http-equiv="X-UA-Compatible" content="ie=edge">
    <title>Document</title>
    <link rel="stylesheet" href="">
    <style>
        *{
            margin: 0;
            padding: 0;
        }
        div{
            position: relative;
            width: 300px;
            height: 166px;
            margin: 20px auto;
           
        }
        div img{
            width: 300px;
            height: 166px;
           
        }
        div p{
            display: none;
            position: absolute;
            bottom: 0;
            left: 0;
            width: 300px;
            height: 30px;
            text-align: center;
            line-height: 30px;
            background-color: rgba(51, 49, 49, 0.5);
            color: #fff;
            transition: all 5s linear 0s;
        }
        div:hover p{
            display: block;
        }
    </style>
</head>

<body>
    <div>
        <img src="./images/0.jpg" alt="">
        <p>北京故宫</p>
    </div>
</body>

</html>

问题描述：

老师我用display：none来让文字隐藏，但是过渡效果失效了

月入过亿 2022-07-13

源自：过渡与动画 2-8 过渡效果实战课（1）