显示到div中图片前面的div

<div class="container">
  <div class="image-wrapper">
    <img src="image.jpg" alt="图片">
  </div>
  <div class="overlay"></div>
</div>

.container {
  position: relative;
}

.image-wrapper {
  position: relative;
  z-index: 1;
}

.overlay {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background-color: rgba(0, 0, 0, 0.5); /* 设置为透明背景色 */
  z-index: 2;
}