今天來分享一下 hover 物件時更換背景顏色的方法，
我是看到這個 Youtube 影片，
但我的寫法跟他的沒有完全一樣，
可以兩邊都看看比較一下，
當然也有不同種寫法，
我知道變換背景這種事用 JS 做是比較合理的方式，
但 HTML/CSS 就能做到，
也是滿好玩的啦～

效果

HTML

<div class="container">
  <div class="item-group">
    <div class="item">
      <h3>Title</h3>
      <p>Lorem ipsum dolor sit amet consectetur adipisicing elit. Assumenda, culpa. Perferendis obcaecati itaque
        asperiores! Officia illum odio optio, reprehenderit distinctio aliquid ullam veritatis soluta voluptatibus
        rerum
        quae, totam ex hic.</p>
    </div>
    <div class="item">
      <h3>Title</h3>
      <p>Lorem ipsum dolor sit amet consectetur adipisicing elit. Assumenda, culpa. Perferendis obcaecati itaque
        asperiores! Officia illum odio optio, reprehenderit distinctio aliquid ullam veritatis soluta voluptatibus
        rerum
        quae, totam ex hic.</p>
    </div>
    <div class="item">
      <h3>Title</h3>
      <p>Lorem ipsum dolor sit amet consectetur adipisicing elit. Assumenda, culpa. Perferendis obcaecati itaque
        asperiores! Officia illum odio optio, reprehenderit distinctio aliquid ullam veritatis soluta voluptatibus
        rerum
        quae, totam ex hic.</p>
    </div>
  </div>
</div>

CSS

* {
  padding: 0;
  margin: 0;
  list-style: none;
  box-sizing: border-box;
}

.container {
  width: 960px;
  margin: auto;
  height: 100vh;
  font-size: 0;
}

.container::before {
  content: '';
  display: inline-block;
  height: 100%;
  width: 0;
  background-color: #faa;
  vertical-align: middle;
}

.item-group {
  font-size: 0;
  display: inline-block;
  vertical-align: middle;
}

.item {
  display: inline-block;
  font-size: 16px;
  width: 290px;
  margin: 0 15px;
  padding: 30px;
  border-radius: 10px;
  box-shadow: 10px 10px 20px rgba(0, 0, 0, .5);
}

.item::after {
  content: '';
  position: absolute;
  z-index: -1;
  left: 0;
  top: 0;
  width: 100%;
  height: 100%;
  transition: .5s;
}

.item:hover {
  color: #fff;
}

.item:first-child:hover,
.item:first-child:hover::after {
  background-color: #16a085;
}

.item:nth-child(2):hover,
.item:nth-child(2):hover::after {
  background-color: #2980b9;
}

.item:last-child:hover,
.item:last-child:hover::after {
  background-color: #c0392b;
}

.item h3 {
  margin-bottom: .4em;
}

今天就先到這裡啦～
我們明天見。