修复html打印内容垂直居中的问题

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

<div class="print-content-container">
    <!-- 要打印的内容 -->
</div>

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

<div class="print-content">
    <!-- 要打印的内容 -->
</div>

<style>
    .print-table {
        display: table;
        width: 100%;
        height: 100%;
    }
    .print-cell {
        display: table-cell;
        vertical-align: middle;
        text-align: center;
    }
</style>

<div class="print-table">
    <div class="print-cell">
        <!-- 要打印的内容 -->
    </div>
</div>