wxappb2b/GuangZuan/miniprogram/components/nav-bar/nav-bar.wxml

<!--components/nav-bar/nav-bar.wxml-->
<van-nav-bar custom-style="background-color: #E92020">
  <van-icon wx:if="{{left}}" slot="left" name="arrow-left" size="25px" color="white"/>
  <text slot="title" style="color: white;">{{title}}</text>
</van-nav-bar>