如何使3个方框居中以匹配屏幕分辨率？

<style>
    .container {
        display: flex;
        justify-content: center;
        align-items: center;
        height: 100vh; /* 设置父容器高度为屏幕高度 */
    }
    .box {
        width: 100px;
        height: 100px;
        background-color: #ccc;
        margin: 10px;
    }
</style>

<div class="container">
    <div class="box"></div>
    <div class="box"></div>
    <div class="box"></div>
</div>

<style>
    .container {
        display: grid;
        place-items: center;
        height: 100vh; /* 设置父容器高度为屏幕高度 */
        grid-template-columns: repeat(3, 1fr); /* 将父容器分为3列 */
        gap: 10px; /* 设置方框之间的间距 */
    }
    .box {
        width: 100px;
        height: 100px;
        background-color: #ccc;
    }
</style>

<div class="container">
    <div class="box"></div>
    <div class="box"></div>
    <div class="box"></div>
</div>