CSS分层，HTML代码在线实时编辑、实时预览

index.html

            
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            <!DOCTYPE html>
<html lang="en">

<head>
  <meta charset="UTF-8">
  <meta name="viewport" content="width=device-width, initial-scale=1.0">
  <link rel="stylesheet" href="./style.css">
  <script src="./index.js"></script>
</head>

<body>
  <div class="container">
<div class="box red">1</div>
<div class="box blue">2</div>
<div class="box green">3</div>
</div>

  <div class="image-container">
<img src="https://img.shetu66.com/2023/06/26/1687741754142411.png" alt="背景" class="background">
<div class="text-overlay">
<h2>HELLO</h2>
<p>探索CSS图层的美丽！</p>
</div>
</div>

  <div class="stacked-boxes">
<div class="box bottom">底部</div>
<div class="box middle">中间</div>
<div class="box top">顶部</div>
</div>



  <div class="scene">
<img src="https://img.shetu66.com/2023/06/26/1687741754142411.png" alt="风景" class="background">
<div class="cloud cloud1"></div>
<div class="cloud cloud2"></div>
<div class="sun"></div>
<div class="bird bird1"></div>
<div class="bird bird2"></div>
<div class="message">欢迎来到我们的分层世界！</div>
</div>
</body>

</html>

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style.css

            
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            .container {
position: relative;
}

.box {
width: 100px;
height: 100px;
position: absolute;
}

.red {
background-color: red;
z-index: 1;
top: 0;
left: 0;
}

.blue {
background-color: blue;
z-index: 2;
top: 30px;
left: 30px;
}

.green {
background-color: green;
z-index: 3;
top: 60px;
left: 60px;
}

<div class="container">
<div class="box red">1</div>
<div class="box blue">2</div>
<div class="box green">3</div>
</div>
.container {
position: relative;
}

.box {
width: 100px;
height: 100px;
position: absolute;
}

.red {
background-color: red;
z-index: 1;
top: 0;
left: 0;
}

.blue {
background-color: blue;
z-index: 2;
top: 30px;
left: 30px;
}

.green {
background-color: green;
z-index: 3;
top: 60px;
left: 60px;
}

<div class="image-container">
<img src="background.jpg" alt="背景" class="background">
<div class="text-overlay">
<h2>欢迎来到我的网站</h2>
<p>探索CSS图层的美丽！</p>
</div>
</div>
.image-container {
position: relative;
width: 500px;
height: 300px;
}

.background {
width: 100%;
height: 100%;
object-fit: contain;
}

.text-overlay {
position: absolute;
top: 50%;
left: 50%;
transform: translate(-50%, -50%);
text-align: center;
color: white;
background-color: rgba(0, 0, 0, 0.5);
padding: 20px;
border-radius: 10px;
}

.stacked-boxes {
position: relative;
height: 200px;
width: 200px;
}

.box {
position: absolute;
width: 100px;
height: 100px;
display: flex;
justify-content: center;
align-items: center;
color: white;
}

.bottom {
background-color: blue;
top: 0;
left: 0;
}

.middle {
background-color: green;
top: 30px;
left: 30px;
}

.top {
background-color: red;
top: 60px;
left: 60px;
}


.scene {
position: relative;
width: 800px;
height: 600px;
overflow: hidden;
}

.background {
width: 100%;
height: 100%;
object-fit: cover;
}

.cloud {
position: absolute;
width: 200px;
height: 100px;
background-color: blue;
border-radius: 50px;
}

.cloud1 {
top: 50px;
left: 100px;
z-index: 2;
}

.cloud2 {
top: 100px;
right: 100px;
z-index: 1;
}

.sun {
position: absolute;
top: 50px;
right: 50px;
width: 100px;
height: 100px;
background-color: yellow;
border-radius: 50%;
z-index: 1;
}

.bird {
position: absolute;
width: 30px;
height: 20px;
background-color: black;
clip-path: polygon(0% 0%, 100% 50%, 0% 100%);
}

.bird1 {
top: 150px;
left: 300px;
z-index: 3;
}

.bird2 {
top: 200px;
right: 400px;
z-index: 3;
}

.message {
position: absolute;
bottom: 50px;
left: 50%;
transform: translateX(-50%);
background-color: rgba(255, 255, 255, 0.7);
padding: 20px;
border-radius: 10px;
z-index: 4;
}

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index.js

            
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            console.log(["Hello 笔.COOL 控制台"])

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