技术栈：HTML+CSS+JS
效果：
源码：
【HTML】
<!DOCTYPE html>
<html lang="zh-CN"><head><meta charset="UTF-8"><meta name="viewport" content="width=device-width, initial-scale=1.0"><title>网格图库</title><link rel="stylesheet" href="243.css">
</head><body><main class='gallery'><div class='item' data-pos='0'><img src='https://picsum.photos/400/300?random=0'></div><div class='item' data-pos='1'><img src='https://picsum.photos/400/300?random=1'></div>
