css 实现flex布局，两边块里面的内容上下左右居中对齐，针对ul和li

<!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>
</head>
<style>
    * {
        margin: 0;
        padding: 0;
    }

    ul {
        list-style: none;
    }

    .content {

        display: flex;
        width: 1240px;
        margin: 100px auto;
    }

    .bigbox1 {
        width: 500px;
        height: 100px;
        background-color: pink;
    }

    /* 让ul对齐 */
    .bigbox1 ul {
        display: flex;
        flex-direction: column;
        justify-content: center;
        align-items: center;
        /* 一定要设高度 才能垂直居中 */
        height: 80px;
    }

    .bigbox1 ul li {
        display: flex;
        flex-direction: column;
        justify-content: center;
        align-items: center;

    }

    .bigbox1 ul li span {}

    .kuai {
        width: 20px;
        /* 这个高度要和左边的名字的行高看准 这样就可以对齐了 */
        height: 20px;
        margin-top: 10px;
        background-color: purple;
    }


    .bigbox2 {
        flex: 1;
        background-color: blue;
    }

    .bigbox2 ul {
        display: flex;
        flex-direction: column;
        justify-content: center;
        align-items: center;
        /* 一定要设高度 才能垂直居中 */
        height: 80px;
    }

    .bigbox2 ul li {
        display: flex;
        flex-direction: column;
        justify-content: center;
        align-items: center;
    }

    .bigbox2 ul li h2 {}

    .bigbox2 ul li span {
        font-size: 20px;
        line-height: 20px;
    }
</style>

<body>
    <div class="content">
        <div class="bigbox1">
            <ul>
                <li>
                    <span>hello</span>
                    <div class="kuai"></div>
                </li>
            </ul>
        </div>
        <div class="bigbox2">
            <ul>
                <li>
                    <h2>11</h2>
                    <span>名字</span>
                </li>
            </ul>
        </div>
    </div>
</body>
</html>

运行效果：

难点1.左边块和右边名字如何对齐，观察字体大小，设置行高，然后左边块设高度，这三个值一样

css 实现flex布局，两边块里面的内容上下左右居中对齐，针对ul和li

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