<view class="express">
  <view class="box" bindtap = "toUrl">
    <van-icon name="logistics" size="60rpx" color="#21b314" />
    <view class="box_conten" wx:if="{{step}}">
      <view class="text">{{step.context}}</view>
      <view class="date">{{step.time}}</view>
    </view>
    <view class="box_conten" wx:else>暂无物流信息</view>
    <van-icon name="arrow" color="#999999" />
  </view>
</view>