<view class="lottery-countdown">
  <block wx:if="{{countdown.hours !== '00'}}">
    <view class="time-item">{{ countdown.hours || '00' }}</view>
    <text class="colon">:</text>
  </block>
  <view class="time-item">{{ countdown.minutes || "00" }}</view>
  <text class="colon">:</text>
  <view class="time-item">{{ countdown.seconds || "00" }}</view>
</view>