当“flex direction”为“column”时,如何将div与顶部对齐?[副本]

.box {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  height: 500px;
  border: 1px solid blue;
}

.box div {
  width: 100px;
  height: 100px;
  border: 1px solid darkgray;
}

.box div:nth-child(1) {
  /*  How do I push the first div tag to the top? */
  background-color: lightgray;
}

.box div:nth-child(2) {
  background-color: lightblue;
}

<div class="box">
  <div>One</div>
  <div>Two</div>
</div>