开发喵星球

品字div

<div class="container">
    <div class="d-flex flex-column">
        <div class="d-flex align-items-start">
            <div class="flex-fill">a</div>
            <div class="flex-fill align-self-end">b</div>
        </div>
        <div class="d-flex align-items-start">
            <div class="flex-fill">c</div>
        </div>
    </div>
</div>