<!DOCTYPE html>
<html lang="zh-CN">
<head>
    <meta charset="UTF-8">
    <!-- 移动端适配 -->
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>404 - 页面不存在</title>
    <style>
        * {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
            font-family: "Microsoft YaHei", sans-serif;
        }

        /* 页面整体样式 */
        body {
            min-height: 100vh;
            display: flex;
            align-items: center;
            justify-content: center;
            background-color: #f8f9fa;
            color: #333;
            text-align: center;
            padding: 20px;
        }

        /* 404容器 */
        .container {
            max-width: 600px;
            width: 100%;
        }

        /* 404大数字 */
        .error-code {
            font-size: 10rem;
            font-weight: 900;
            color: #e53935;
            line-height: 1;
            margin-bottom: 20px;
            animation: float 2s ease-in-out infinite;
        }

        /* 标题 */
        .title {
            font-size: 1.8rem;
            margin-bottom: 15px;
            color: #444;
        }

        /* 描述文字 */
        .desc {
            font-size: 1rem;
            color: #666;
            margin-bottom: 30px;
            line-height: 1.6;
        }

        /* 返回首页按钮 */
        .btn {
            display: inline-block;
            padding: 12px 30px;
            background-color: #4285f4;
            color: #fff;
            text-decoration: none;
            border-radius: 50px;
            font-size: 1rem;
            transition: all 0.3s ease;
        }

        .btn:hover {
            background-color: #3367d6;
            transform: translateY(-2px);
        }

        /* 数字浮动动画 */
        @keyframes float {
            0%, 100% { transform: translateY(0); }
            50% { transform: translateY(-10px); }
        }

        /* 小屏幕适配 */
        @media (max-width: 576px) {
            .error-code {
                font-size: 6rem;
            }
            .title {
                font-size: 1.4rem;
            }
        }
    </style>
</head>
<body>
    <div class="container">
        <div class="error-code">404</div>
        <h1 class="title">页面未找到</h1>
        <p class="desc">你访问的页面不存在、已被移动或永久删除。<br>请检查网址是否正确，或返回首页继续浏览。</p>
        <a href="/" class="btn">返回首页</a>
    </div>
</body>
</html>