效果图：
完整代码：
<!DOCTYPE html>
<html>
<head><meta charset="UTF-8" /><title>旋转三角形加载动画</title><style type="text/css">body {background: #ECF0F1;display: flex;justify-content: center;align-items: center;height: 100vh;margin: 0;}.triangle {width: 0;height: 0;border-left: 25px solid transparent;border-right: 25px solid transparent;border-bottom: 50px solid #3498db;animation: spin 1s linear infinite;}@keyframes spin {0% {transform: rotate(0deg);
![[图解]建模相关的基础知识-08](https://img-blog.csdnimg.cn/direct/5bcbc2732fd64c4e849bfe40489520fc.png)
