一、背景动画
<!-- 背景动画 -->
<canvas id="c_n9" width="1920" height="990" style="position: fixed; top: 0px; left: 0px; z-index: -1; opacity: 0.5;"></canvas>
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一、背景动画
<!-- 背景动画 -->
<canvas id="c_n9" width="1920" height="990" style="position: fixed; top: 0px; left: 0px; z-index: -1; opacity: 0.5;"></canvas>
<script src="https://files.cnblogs.com/files/jingmoxukong/canvas-nest.min.js"></script>