结合DeepSeek提供的代码，终于实现了堆叠两张图片动态循环切换，以下是代码：
通过绝对定位放了两张图片

<div class="col-lg-5" style="z-index: 40; position: relative;"><img src="images/banner_1.png" class="shadow_fa img1"style="width: 480px; height:480px; position: absolute; top: 15%; left:16%; z-index: 10;"><img src="images/banner_2.png" class="shadow_fa img2"style="width: 480px; height:480px; position: absolute; top: 7%; left:24%; z-index: 9;">
</div>

然后是CSS代码部分

<style type="text/css">.shadow_fa {/* 所有变化属性均触发动画 */transition: all 1s ease-in-out;}
</style>

然后是js代码

<script>// 获取两张图片const img1 = document.querySelector('.img1');const img2 = document.querySelector('.img2');function swapImages() {// 临时存储图片1的样式const tempTop = img1.style.top;const tempLeft = img1.style.left;const tempZIndex = img1.style.zIndex;const tempOpacity = img1.style.opacity;// 将图片1的样式设置为图片2的当前值img1.style.top = img2.style.top;img1.style.left = img2.style.left;img1.style.zIndex = img2.style.zIndex;img1.style.opacity = img2.style.opacity;// 将图片2的样式设置为图片1的原始值img2.style.top = tempTop;img2.style.left = tempLeft;img2.style.zIndex = tempZIndex;img2.style.opacity = tempOpacity;// 强制触发浏览器重绘（关键代码）void img1.offsetWidth;}// 每5秒执行一次setInterval(swapImages, 5000);
</script>