如何让被屏蔽的div中的元素完全可见(工具提示风格)？

<div class="container">
  <div class="blocked-div">
    <span class="tooltip">工具提示内容</span>
    <div class="content">被屏蔽的元素</div>
  </div>
</div>

.container {
  position: relative;
  width: 200px;
  height: 200px;
}

.blocked-div {
  position: relative;
  width: 100%;
  height: 100%;
  background-color: lightgray;
  opacity: 0.5;
}

.tooltip {
  position: absolute;
  top: -30px;
  left: 50%;
  transform: translateX(-50%);
  background-color: #333;
  color: #fff;
  padding: 5px;
  border-radius: 5px;
  opacity: 0;
  transition: opacity 0.3s;
}

.tooltip::before {
  content: "";
  position: absolute;
  top: 100%;
  left: 50%;
  transform: translateX(-50%);
  border-width: 5px;
  border-style: solid;
  border-color: transparent transparent #333 transparent;
}

.content {
  position: relative;
  z-index: 1;
}

.blocked-div:hover .tooltip {
  opacity: 1;
}