擬似要素「after」で作るリストデザイン

<!DOCTYPE html>
<html lang="ja">
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1">
<style>ul{
  border: 1px solid #999999;
  padding: 0;
  margin: 10px 20px;
}

.list {
  border: 1px solid #999999;
  margin: 10px 20px;
}

.list-item {
  list-style-type: none;
  padding: 10px 20px;
  position: relative;
}

.list-item + .list-item:after {
  content: '';
  position: absolute;
  left: 0;
  right: 0;
  top: 0;
  border-top: 1.5px dashed #999999;
  margin: auto;
  width: 90%;
}</style>
</head>
<body>
<ul>
<li class="list-item">緊急事態宣言</li>
<li class="list-item">まん延防止等重点措置</li>
<li class="list-item">東京来ないで</li>
<li class="list-item">五輪無観客</li>
</ul>
<script>
</script>
</body>
</html>

ul{
  border: 1px solid #999999;
  padding: 0;
  margin: 10px 20px;
}

.list {
  border: 1px solid #999999;
  margin: 10px 20px;
}

.list-item {
  list-style-type: none;
  padding: 10px 20px;
  position: relative;
}

.list-item + .list-item:after {
  content: '';
  position: absolute;
  left: 0;
  right: 0;
  top: 0;
  border-top: 1.5px dashed #999999;
  margin: auto;
  width: 90%;
}