jquery弹出层渐渐消失

<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>jQuery 弹出层淡出示例</title>
<script src="https://code.jquery.com/jquery-3.6.0.min.js"></script>
<style>
  #popup {
    display: none;
    position: fixed;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    padding: 20px;
    background-color: white;
    border: 1px solid black;
    box-shadow: 0 0 10px rgba(0,0,0,0.5);
  }
</style>
</head>
<body>

<div id="popup">这是一个弹出层</div>

<button id="showPopup">显示弹出层</button>
<button id="hidePopup">隐藏弹出层</button>

<script>
$(document).ready(function() {
  $('#showPopup').click(function() {
    $('#popup').fadeIn();
  });

  $('#hidePopup').click(function() {
    $('#popup').fadeOut(1000); // 1000 毫秒内淡出
  });
});
</script>

</body>
</html>