在vue使用vant在＜stylus＞中修改样式

<template>
  <van-list>
    <van-card
      class="contactCard"
      v-for="item in contacts"
      :key="item.id"
      :thumb="item.avatar"
      :desc="item.contact"
      price="2.00"
      @click="tapContacts"
    >
    </van-card>
  </van-list>
  <van-button class="mybtn" type="primary" style="border-radius: 50px"
    >主要按钮</van-button
  >
</template>

<style scoped lang="stylus">

.van-button--primary {
  color red
  background: yellow;
}

.contactCard.van-card{
  --van-card-desc-color: red
  --van-card-desc-line-height:10px
}
</style>