<!DOCTYPE html>
<html lang="zh-CN">
<head>
    <meta charset="utf-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <title>404 - 页面不存在</title>
    <link href="/css/bootstrap.min.css?v=3.3.7" rel="stylesheet"/>
    <link href="/css/font-awesome.min.css?v=4.7.0" rel="stylesheet"/>
    <style>
        body {
            background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
            min-height: 100vh;
            display: flex;
            align-items: center;
            justify-content: center;
            font-family: 'Microsoft YaHei', Arial, sans-serif;
            margin: 0;
            padding: 20px;
        }

        .error-container {
            background: #fff;
            border-radius: 20px;
            padding: 60px 40px;
            box-shadow: 0 20px 60px rgba(0, 0, 0, 0.3);
            text-align: center;
            max-width: 500px;
            width: 100%;
            animation: fadeInUp 0.6s ease;
        }

        @keyframes fadeInUp {
            from {
                opacity: 0;
                transform: translateY(30px);
            }
            to {
                opacity: 1;
                transform: translateY(0);
            }
        }

        .error-icon {
            font-size: 120px;
            color: #ff6600;
            margin-bottom: 30px;
            animation: bounce 2s infinite;
        }

        @keyframes bounce {
            0%, 20%, 50%, 80%, 100% {
                transform: translateY(0);
            }
            40% {
                transform: translateY(-20px);
            }
            60% {
                transform: translateY(-10px);
            }
        }

        .error-code {
            font-size: 72px;
            font-weight: bold;
            color: #333;
            margin: 0;
            line-height: 1;
        }

        .error-title {
            font-size: 28px;
            color: #ff6600;
            margin: 20px 0 15px;
            font-weight: bold;
        }

        .error-description {
            font-size: 16px;
            color: #666;
            margin-bottom: 40px;
            line-height: 1.6;
        }

        .error-actions {
            display: flex;
            gap: 15px;
            justify-content: center;
            flex-wrap: wrap;
        }

        .btn-home {
            background: linear-gradient(90deg, #ff6600 0%, #ff8c00 100%);
            color: #fff;
            padding: 12px 35px;
            border-radius: 25px;
            text-decoration: none;
            font-size: 16px;
            font-weight: bold;
            transition: all 0.3s ease;
            border: none;
            display: inline-block;
        }

        .btn-home:hover {
            transform: translateY(-2px);
            box-shadow: 0 10px 20px rgba(255, 102, 0, 0.3);
            color: #fff;
            text-decoration: none;
        }

        .btn-back {
            background: #f5f5f5;
            color: #666;
            padding: 12px 35px;
            border-radius: 25px;
            text-decoration: none;
            font-size: 16px;
            font-weight: bold;
            transition: all 0.3s ease;
            display: inline-block;
        }

        .btn-back:hover {
            background: #e0e0e0;
            color: #333;
            text-decoration: none;
        }

        .error-tips {
            margin-top: 40px;
            padding-top: 30px;
            border-top: 1px solid #eee;
            font-size: 14px;
            color: #999;
        }

        .error-tips p {
            margin: 5px 0;
        }

        @media (max-width: 576px) {
            .error-container {
                padding: 40px 20px;
            }

            .error-icon {
                font-size: 80px;
            }

            .error-code {
                font-size: 56px;
            }

            .error-title {
                font-size: 22px;
            }

            .error-actions {
                flex-direction: column;
            }

            .btn-home,
            .btn-back {
                width: 100%;
            }
        }
    </style>
</head>
<body>
    <div class="error-container">
        <div class="error-icon">
            <i class="fa fa-exclamation-circle"></i>
        </div>
        <h1 class="error-code">404</h1>
        <h2 class="error-title">页面不存在</h2>
        <p class="error-description">
            抱歉，您访问的页面不存在或已被删除。<br>
            请检查网址是否正确。
        </p>
        <div class="error-actions">
            <a href="/" class="btn-home">
                <i class="fa fa-home"></i> 返回首页
            </a>
            <a href="javascript:history.back()" class="btn-back">
                <i class="fa fa-arrow-left"></i> 返回上页
            </a>
        </div>
        <div class="error-tips">
            <p><i class="fa fa-info-circle"></i> 如果您认为这是一个错误，请联系管理员</p>
        </div>
    </div>
</body>
</html>
