实现原理：利用css实现电梯导航很简单，基本原理就是通过a标签绑定跳转目标的id来实现的

  html代码：

 <div class="body"><div class="top" id="top"></div><div class="con1" id="con1"></div><div class="con2" id="con2"></div><div class="footer" id="footer"></div></div><div class="navs"><div class="navs_top"><a href="#top">top</a></div><div class="navs_nav"><a href="#con1">nav</a></div><div class="navs_con"><a href="#con2">con</a></div><div class="navs_footer"><a href="#footer">footer</a></div></div>

css代码：

.top {width: 80%;background-color: aqua;height: 300px;margin: auto;}.con1 {position: relative;width: 80%;background-color: brown;height: 300px;margin: auto;}.con2 {width: 80%;background-color: wheat;height: 300px;margin: auto;}.footer {width: 80%;background-color: rebeccapurple;height: 300px;margin: auto;}.navs {position: fixed;right: 4.375rem;top: 50%;}html{/* 页面滚动效果 */scroll-behavior: smooth;}

效果演示：