以下是如何修改CSS代码的示例：

.card {
  height: 300px; /* set a fixed height for all cards */
  margin: 10px; /* add some margin to separate the cards */
}

.card-deck {
  display: flex;
  flex-wrap: wrap;
  align-items: stretch; /* make all cards the same height */
  justify-content: center;
}

下面是一个如何修改Bootstrap代码的例子：

<div class="card-deck justify-content-center">
  <div class="card">
    <!-- card content goes here -->
  </div>
  <div class="card">
    <!-- card content goes here -->
  </div>
  <!-- add more cards as needed -->
</div>

请记住将<!-- card content goes here -->占位符替换为您的实际卡片内容。
我希望这能帮助您正确对齐Bootstrap KitchenFlume卡！