 />
    <meta name="description" content="请配置页面描述" />
</head>

<head>
    <title>Flex Layout Example</title>
    <style>
        body {
            margin: 0;
            padding: 0;
            font-family: Arial, sans-serif;
        }

        .list {
            display: flex;
            flex-direction: column;
            align-items: center;
            height: 50vh;
            overflow: scroll;
            background-color: #f1f1f1;
        }

        .list-item {
            margin: 1