<div class="wrap">
    <div class="contents">
      <ul class="list">
        <li>リストの項目</li>
        <li>リストの項目テキスト多め</li>
        <li>リストの項目</li>
        <li>リストの項目テキスト多め</li>
      </ul>
    </div>
  </div>
* {
  margin: 0;
  padding: 0;
  line-height: 1;
}
.wrap {
  padding: 50px 0;
  background-color: #ccc;
}
.contents {
  position: relative;
  width: 100%;
  height: 100%;
}
.list {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
}

External CSS

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External JavaScript

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