文本居中时如何继承父div？

<style>
    .parent {
        display: flex;
        justify-content: center;
        align-items: center;
    }
</style>

<div class="parent">
    <p>居中的文本</p>
</div>

<style>
    .parent {
        position: relative;
    }

    .child {
        position: absolute;
        top: 50%;
        left: 50%;
        transform: translate(-50%, -50%);
    }
</style>

<div class="parent">
    <p class="child">居中的文本</p>
</div>