HTML 查看器

<!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>