css 重叠
<body>
<style>
.con div{position: absolute;color:rgb(57, 174, 242);font-size:larger;}
.img1{top:30px;left:100px;}
.img2{top:20px;left:20px;}
.img3{top:40px;left:40px;}
</style>
<div class="con">
<div class="bg"><img src="bg.png"></div>
<div class="img1">36.5</div>
<div class="img2">45.9</div>
<div class="img3">135.5</div>
</div>
</body>
