test1.html

<!DOCTYPE html>
<html lang="en">
<head>
  <meta charset="UTF-8">
  <meta name="viewport" content="width=device-width, initial-scale=1.0">
  <title>Smooth Scroll with Sticky Navbar</title>
  <style>
    body {
      margin: 0;
      padding: 0;
      font-family: 'Arial', sans-serif;
      scroll-behavior: smooth;
    }

    #zib {
      position: sticky;
      top: 0;
      width: 85%;
      margin: 10px;
      height: 200px;
      background-color: white;
      border-radius: 10px;
      padding: 15px;
      transition: top 0.3s ease-in-out; /* 添加过渡效果 */
    }

    #zib-2 {
      padding-left: 10px;
      margin-top: 10px;
    }

    .zib-3 {
      padding: 20px 10px 20px 0;
      border-left: 1px #f5f6f7 solid;
      position: relative;
    }

    .zib-3 li {
      height: 33px;
      margin-left: 10px;
      position: relative;
      transition: .3s;
      border-radius: 5px;
    }

    .zib-3 li a {
      color: #4e5358;
      padding-left: 40px !important;
      padding: 10px;
      line-height: 33px;
      font-size: 12px;
      transition: .3s;
    }

    .zib-3 li:hover {
      background-color: #f5f6f7;
    }

    .zib-3 li:hover.n a {
      color: #eb71aa;
    }

    .zib-3 li:hover::before {
      opacity: 1;
    }

    .active::before {
      opacity: 1;
    }
  </style>
</head>
<body>

<div id="zib">
  <div id="zib-2">
    <ul class="zib-3">
      <li class="n active"><a href="#wznav_0">游戏截图</a></li>
      <li class="n"><a href="#wznav_1">游戏介绍</a></li>
      <li class="n"><a href="#wznav_2">备注</a></li>
      <li class="n"><a href="#wznav_3">下载链接</a></li>
    </ul>
  </div>
</div>

<!-- 添加一些占位元素以便滚动 -->
<div style="height: 1000px;"></div>

<script>
  window.addEventListener('scroll', function() {
    const zib = document.querySelector('#zib');
    const scrollPosition = window.scrollY;

    // 根据滚动位置决定导航栏是否粘性滚动
    if (scrollPosition === 0) {
      zib.style.top = '0';
    } else {
      zib.style.top = `${scrollPosition}px`;
    }
  });
</script>

</body>
</html>