<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Welcome to Mietubl Online Marketing System</title>
    <style>
        /* 页面基础样式 */
        body {
            font-family: 'Arial', sans-serif;
            margin: 0;
            padding: 0;
            height: 100vh;
            background-color: #f0f0f0;
            display: flex;
            justify-content: center;
            align-items: center;
        }

        /* 居中显示的容器 */
        .container {
            text-align: center;
            background-color: #ffffff;
            padding: 30px;
            border-radius: 10px;
            box-shadow: 0 4px 8px rgba(0, 0, 0, 0.1);
        }

        /* 欢迎文本样式 */
        h1 {
            font-size: 36px;
            color: #333333;
            margin-bottom: 10px;
        }

        /* 添加动画 */
        .container h1 {
            animation: fadeIn 1.5s ease-in-out;
        }

        /* 动画效果 */
        @keyframes fadeIn {
            0% {
                opacity: 0;
                transform: translateY(-20px);
            }
            100% {
                opacity: 1;
                transform: translateY(0);
            }
        }
    </style>
</head>
<body>
<div class="container">
    <h1>Welcome to Mietubl Online Marketing System</h1>
</div>
</body>
</html>
