css实现文字在背景图片之上

<div class="imgs">
  <!-- 背景图 -->
  <div class="background">
    <img :src="item.voteTime ? imgSrc1:imgSrc2" width="100%" height="100%" alt="" />
  </div>
  <!-- 文字 -->
  <div class="front">
    <div v-if="item.voteTime">
      <p>非常感谢！</p>
      <p>您已投票：<span>{{item.voteTime}}</span></p>
    </div>
    <p v-else style="color:#999999">抱歉，您未完成投票~</p>
  </div>
</div>

data() {
  return {
    imgSrc1:require('@/common/imgs/yitoupiao.png'),
    imgSrc2:require('@/common/imgs/weiwancheng.png'),
  }
},

.imgs {
  background: #fff;
  position: relative;
  width: 100%;
  height: 250px;
  color: #195541;
  .background{
    // width:100%;  
    // height:100%;  /**宽高100%是为了图片铺满屏幕 */
    // z-index:-1;
    z-index:1;
    position: absolute;
    width: 250px;
    height: 100%;
    right: 20px;
    bottom: 0px;
  }
  .front{
    z-index:2;
    position: absolute;
    text-align: center;
    top: 39%;
    left: 25%;
    font-weight: normal;
    line-height: 40px;
    font-size: 28px;
  }
}