鼠标经过，图片有往下滑 半透明的效果

 



```html
<!DOCTYPE html>
<html lang="en">
  <head>
    <meta charset="UTF-8" />
    <meta http-equiv="X-UA-Compatible" content="IE=edge" />
    <meta name="viewport" content="width=device-width, initial-scale=1.0" />
    <title>Document</title>
    <style>
      * {
        margin: 0;
        padding: 0;
      }
      div {
        width: 100px;
        height: 100px;
        background-color: lightblue;
        transition: all linear 0.5s;
      }
      div:hover {
        margin-top: 50px;
        opacity: 0.5;
      }
    </style>
  </head>
  <body>
    <div></div>
  </body>
  <script></script>
</html>

```