<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<style>
body {
font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
color: white;
display: flex;
justify-content: center;
align-items: center;
height: 100vh;
margin: 0;
}
.card {
background: rgba(255, 255, 255, 0.2);
backdrop-filter: blur(10px);
padding: 2rem;
border-radius: 1rem;
box-shadow: 0 8px 32px 0 rgba(31, 38, 135, 0.37);
border: 1px solid rgba(255, 255, 255, 0.18);
text-align: center;
max-width: 400px;
}
h1 { margin-top: 0; }
button {
background: white;
color: #764ba2;
border: none;
padding: 0.8rem 1.5rem;
border-radius: 2rem;
font-weight: bold;
cursor: pointer;
transition: transform 0.2s;
}
button:hover {
transform: scale(1.05);
}
</style>
</head>
<body>
<div class="card">
<h1>你好，世界！</h1>
<p>这是您的 HTML 代码的实时预览。</p>
<button onclick="alert('运行成功！')">点我</button>
</div>
</body>
</html>