使用方法:
1、head引入css文件
<link rel="stylesheet" href="css/style.css">
2、body引入HTML代码
<footer>
<span class="footer-left"><svg viewBox="0 0 18 18"><path d="M2 13.5h14V12H2v1.5zm0-4h14V8H2v1.5zM2 4v1.5h14V4H2z"/></svg></span>
<div class="add-menu closed">
<span class="add-btn add-file"><svg viewBox="0 0 18 18"><path d="M13 14c0 2.21-1.79 4-4 4s-4-1.79-4-4V3c0-1.66 1.34-3 3-3s3 1.34 3 3v9c0 1.1-.9 2-2 2s-2-.9-2-2V4h1v8c0 .55.45 1 1 1s1-.45 1-1V3c0-1.1-.9-2-2-2s-2 .9-2 2v11c0 1.66 1.34 3 3 3s3-1.34 3-3V4h1v10z"/></svg></span>
<span class="add-btn add-list"><svg viewBox="0 0 24 24"><path d="M4 14h4v-4H4v4zm0 5h4v-4H4v4zM4 9h4V5H4v4zm5 5h12v-4H9v4zm0 5h12v-4H9v4zM9 5v4h12V5H9z"/></svg></span>
<span class="add-btn open-close"><svg viewBox="0 0 24 24"><path d="M19 13h-6v6h-2v-6H5v-2h6V5h2v6h6v2z"/></svg></span>
<span class="add-btn add-recording"><svg viewBox="0 0 24 24"><path d="M12 14c1.66 0 2.99-1.34 2.99-3L15 5c0-1.66-1.34-3-3-3S9 3.34 9 5v6c0 1.66 1.34 3 3 3zm5.3-3c0 3-2.54 5.1-5.3 5.1S6.7 14 6.7 11H5c0 3.41 2.72 6.23 6 6.72V21h2v-3.28c3.28-.48 6-3.3 6-6.72h-1.7z"/></svg></span>
<span class="add-btn add-note"><svg viewBox="0 0 24 24"><path d="M3 17.25V21h3.75L17.81 9.94l-3.75-3.75L3 17.25zM20.71 7.04c.39-.39.39-1.02 0-1.41l-2.34-2.34c-.39-.39-1.02-.39-1.41 0l-1.83 1.83 3.75 3.75 1.83-1.83z"/></svg></span>
</div>
<span class="footer-right">
<span><svg viewBox="0 0 24 24"><path d="M15.5 14h-.79l-.28-.27C15.41 12.59 16 11.11 16 9.5 16 5.91 13.09 3 9.5 3S3 5.91 3 9.5 5.91 16 9.5 16c1.61 0 3.09-.59 4.23-1.57l.27.28v.79l5 4.99L20.49 19l-4.99-5zm-6 0C7.01 14 5 11.99 5 9.5S7.01 5 9.5 5 14 7.01 14 9.5 11.99 14 9.5 14z"/></svg></span>
<span><svg viewBox="0 0 18 18"><path d="M9 5.5c.83 0 1.5-.67 1.5-1.5S9.83 2.5 9 2.5 7.5 3.17 7.5 4 8.17 5.5 9 5.5zm0 2c-.83 0-1.5.67-1.5 1.5s.67 1.5 1.5 1.5 1.5-.67 1.5-1.5S9.83 7.5 9 7.5zm0 5c-.83 0-1.5.67-1.5 1.5s.67 1.5 1.5 1.5 1.5-.67 1.5-1.5-.67-1.5-1.5-1.5z"/></svg></span>
</span>
<div class="footer-bg"></div>
</footer>
<script src="js/index.js"></script>