vant-ui组件库中如何修改NavBar导航栏的样式

<div id="div_box_nav"> 
  <van-nav-bar
    title="标题"
    left-text="返回"
    left-arrow
   />
  </div>

<style lass="scss" scoped>
.van-nav-bar {
  background-color: #2f97ec;
}
</style>

<style lass="scss" scoped>
#div_boxs_lnteado /deep/ .van-nav-bar__title {
  color: white;
  font-size: 0.45rem;
}
</style>

<style lass="scss" scoped>
#div_boxs_lnteado /deep/ .van-icon {
  color: white;
}
</style>

<van-nav-bar
    fixed
    :title="title"
    :right-text="text"
    @click-left="onClickLeft"
    @click-right="onClickRight"
    class="van-ellipsis"
  >
    <template #left>
      <van-icon color="#fff" name="search" size="23" v-show="showIcon" />
    </template>
  </van-nav-bar>
  

.van-nav-bar {
 background-color: rgb(241, 186, 66);
}
::v-deep .van-icon {
 color: #fff;
}
::v-deep .van-nav-bar__text {
 color: #fff;
}
::v-deep .van-ellipsis {
 color: #fff;
}