在angular material 2中，有没有办法将单选按钮的标签放在单选按钮本身的上方？

.mat-radio-button {
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
}

.mat-radio-button .mat-radio-label-content {
  margin-top: 5px;
}

<mat-radio-group>
  <mat-radio-button value="option1">
    <span>Option 1</span>
  </mat-radio-button>
  <mat-radio-button value="option2">
    <span>Option 2</span>
  </mat-radio-button>
  <mat-radio-button value="option3">
    <span>Option 3</span>
  </mat-radio-button>
</mat-radio-group>