HTML
CSS
JavaScript
HTML
<!DOCTYPE html>
<html>
<head>
  <meta charset="utf-8">
  <meta name="viewport" content="width=device-width">
  <title>阴影 - 鼠标悬浮时加深阴影</title>
  <link rel="stylesheet" href="https://cdn.w3cbus.com/library/mdui/1.0.2/css/mdui.min.css"/>
</head>
<body>

  <div class="mdui-container">
    <div class="mdui-card mdui-hoverable" style="max-width: 400px;margin-top: 20px;">
      <div class="mdui-card-media">
        <img src="https://cdn.w3cbus.com/mdui/docs~1/static/1ca4b7b2b4b2f2352aeb.jpg"/>
      </div>
      <div class="mdui-card-actions">
        <button class="mdui-btn mdui-ripple">action 1</button>
        <button class="mdui-btn mdui-ripple">action 2</button>
      </div>
    </div>
  </div>

  <script src="https://cdn.w3cbus.com/library/mdui/1.0.2/js/mdui.min.js"></script>
</body>
</html>
CSS

  
JavaScript