CSS:动画悬停，子元素的过渡

Question

我猜是简单的问题，但似乎找不到解决方案......

相当简单的HTML结构：.interview有一个display:none的子.overlay。当悬停在孩子身上时.interview我想淡出。但是不起作用。

.interview {
        background:red;
        position:relative;
        height:710px;
        /*Transition*/
        transition: all .5s cubic-bezier(0.19, 1, 0.22, 1) 0s;
        -webkit-transition: all .5s cubic-bezier(0.19, 1, 0.22, 1) 0s;
        -moz-transition: all .5s cubic-bezier(0.19, 1, 0.22, 1) 0s;
        -o-transition: all .5s cubic-bezier(0.19, 1, 0.22, 1) 0s;
        -ms-transition: all .5s cubic-bezier(0.19, 1, 0.22, 1) 0s;
}
.interview .overlay {
        position:absolute;
        background:rgba(0, 0, 0, 0.6);
        height:100%;
        width:100%;
        top:0;
        left:0;
        display:none;
}

.interview:hover {
     .overlay { display:block };
}

为了在这里工作，我必须把过渡放在哪里？

Answer 1

display：none;从页面中删除一个块，就好像它从未存在过一样。

改用opacity显示属性不适用于过渡

.interview {
  background: red;
  position: relative;
  height: 710px;
  /*Transition*/
  transition: all .5s cubic-bezier(0.19, 1, 0.22, 1) 0s;
  -webkit-transition: all .5s cubic-bezier(0.19, 1, 0.22, 1) 0s;
  -moz-transition: all .5s cubic-bezier(0.19, 1, 0.22, 1) 0s;
  -o-transition: all .5s cubic-bezier(0.19, 1, 0.22, 1) 0s;
  -ms-transition: all .5s cubic-bezier(0.19, 1, 0.22, 1) 0s;
}
.interview .overlay {
  position: absolute;
  background: rgba(0, 0, 0, 0.6);
  height: 100%;
  width: 100%;
  top: 0;
  left: 0;
  opacity: 0;
  transition: 1s linear;
}
.interview:hover .overlay {
  opacity: 1;
}

<div class="interview">
  <div class="overlay"></div>
</div>