meet_miniprogramr/pages/detail/stroke.wxml

<!--pages/detail/stroke.wxml-->
<view class="stroke_detail">
  <video style="{{'width: 750rpx;height: 422rpx;'}}" wx:if="{{agendavideo}}" src="{{agendavideo}}" poster="{{cover}}" />
  <image style="{{'width: 750rpx;height: 422rpx;'}}" src="{{cover}}" wx:if="{{!agendavideo && cover}}" mode="scaleToFill"/>
  <view class="stroke_item" wx:for="{{steps}}" wx:key="index">
    <view class="stroke_line">
      <view class="stroke_proint"></view>
    </view>    
    <view class="{{index !== 0 ? 'van-hairline--top' : ''}}" style="padding: 20rpx 0;">
      <view class="title" wx:if="{{item.title}}">{{item.title}}</view>
      <view class="time_start" wx:if="{{item.startTime}}">{{item.startTime}}</view>
      <view class="time_end" wx:if="{{item.endTime}}">{{item.endTime}}</view>
      <view class="jj" wx:if="{{item.speaker}}">{{item.speaker}}</view>
      <view class="jj_detail" wx:if="{{item.speakerTags}}">{{item.speakerTags}}</view>
    </view>
  </view>
</view>