css下拉列表代码

<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<title>CSS Dropdown Menu</title>
<style>
  .dropdown {
    position: relative;
    display: inline-block;
  }

  .dropdown-content {
    display: none;
    position: absolute;
    background-color: #f9f9f9;
    min-width: 160px;
    box-shadow: 0px 8px 16px 0px rgba(0,0,0,0.2);
    z-index: 1;
  }

  .dropdown-content a {
    color: black;
    padding: 12px 16px;
    text-decoration: none;
    display: block;
  }

  .dropdown-content a:hover {
    background-color: #f1f1f1;
  }

  .dropdown:hover .dropdown-content {
    display: block;
  }
</style>
</head>
<body>

<div class="dropdown">
  <button>Dropdown</button>
  <div class="dropdown-content">
    <a href="#">Link 1</a>
    <a href="#">Link 2</a>
    <a href="#">Link 3</a>
  </div>
</div>

</body>
</html>