我有一个带有嵌套div的HTML。我的孩子div没有显示背景颜色：＃00000

我尝试了溢出：隐藏且重要，没有起作用

HTML

<div class="container">
  <div class="progress">
    <div class="progress-track"></div>
    <div id="Created" class="progress-step">
      Created
    </div>
    <div id="Approved" class="progress-step">
      Approved
    </div>
    </div>
  </div>

SCSS

.container {
  border: double;
  margin-left: 50%;
}

.progress {
  position: relative;
  display: flex;
}

.progress .progress-track {
  position: absolute;
  background-color: #a82222;
  height: 22px;
  z-index: -1;
  overflow: hidden;
}

此类不起作用-> .progress .progress-track {}