下面是效果图
下面是实现代码
<!DOCTYPE html> <html lang="zh-CN"><head><meta charset="UTF-8" /><title>滚动导航 Demo</title><style>body {margin: 0;font-family: sans-serif;scroll-behavior: smooth;/* 平滑滚动 */}/* 顶部导航栏 */.navbar {position: fixed;top: 0;left: 0;width: 100%;background: #fff;border-bottom: 1px solid #eee;display: flex;justify-content: center;gap: 20px;padding: 10px 0;z-index: 1000;}.navbar a {color: #555;text-decoration: none;padding: 6px 10px;border-radius: 4px;}.navbar a.active {color: #fff;background: #409eff;}/* 内容区 */section {height: 100vh;padding-top: 60px;/* 避免被导航栏遮挡 */box-sizing: border-box;}section:nth-child(odd) {background: #f6f6f6;}section:nth-child(even) {background: #e8f1ff;}</style> </head><body><!-- 顶部导航栏 --><div class="navbar" id="navbar"><a href="#s1">首页</a><a href="#s2">功能</a><a href="#s3">关于</a></div><!-- 页面内容 --><section id="s1"><h2>首页</h2></section><section id="s2"><h2>功能介绍</h2></section><section id="s3"><h2>关于我们</h2></section><script>const links = document.querySelectorAll('.navbar a');const sections = Array.from(links).map(a => document.querySelector(a.getAttribute('href')));const observer = new IntersectionObserver((entries) => {entries.forEach(entry => {if (entry.isIntersecting) {links.forEach(link => link.classList.toggle('active', link.getAttribute('href').slice(1) === entry.target.id));}});}, { threshold: 0.6 }); // 进入视口 60% 时高亮 sections.forEach(s => observer.observe(s));</script> </body></html>
![P1545 [USACO04DEC] Dividing the Path G 题解](http://pic.xiahunao.cn/P1545 [USACO04DEC] Dividing the Path G 题解)
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