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<!DOCTYPE html>
<html lang="zh">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>AI Translation Assistant</title>
    <link href="https://cdnjs.cloudflare.com/ajax/libs/tailwindcss/2.2.19/tailwind.min.css" rel="stylesheet">
    <link href="https://cdnjs.cloudflare.com/ajax/libs/animate.css/4.1.1/animate.min.css" rel="stylesheet">
    <link href="https://cdnjs.cloudflare.com/ajax/libs/font-awesome/6.0.0/css/all.min.css" rel="stylesheet">
    <style>
        @import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700&display=swap');
        
        :root {
            --primary-gradient: linear-gradient(135deg, #6366f1 0%, #8b5cf6 100%);
            --secondary-gradient: linear-gradient(135deg, #f472b6 0%, #c084fc 100%);
        }

        body {
            font-family: 'Inter', sans-serif;
            background: #f8fafc;
        }

        .gradient-text {
            background: var(--primary-gradient);
            background-clip: text;
            -webkit-text-fill-color: transparent;
        }

        .gradient-border {
            position: relative;
            background: linear-gradient(#fff, #fff) padding-box,
                       var(--primary-gradient) border-box;
            border: 2px solid transparent;
            border-radius: 0.75rem;
        }

        .glass-effect {
            background: rgba(255, 255, 255, 0.7);
            backdrop-filter: blur(10px);
            -webkit-backdrop-filter: blur(10px);
        }

        .nav-link {
            position: relative;
            transition: all 0.3s ease;
        }

        .nav-link::after {
            content: '';
            position: absolute;
            width: 0;
            height: 2px;
            bottom: -2px;
            left: 0;
            background: var(--primary-gradient);
            transition: width 0.3s ease;
        }

        .nav-link:hover::after {
            width: 100%;
        }

        .floating {
            animation: floating 3s ease-in-out infinite;
        }

        @keyframes floating {
            0% { transform: translateY(0px); }
            50% { transform: translateY(-10px); }
            100% { transform: translateY(0px); }
        }

        .progress-bar-animation {
            background-size: 200% 200%;
            animation: gradientMove 2s linear infinite;
        }

        @keyframes gradientMove {
            0% { background-position: 200% 0; }
            100% { background-position: -200% 0; }
        }

        .card-hover {
            transition: all 0.3s ease;
        }

        .card-hover:hover {
            transform: translateY(-5px);
            box-shadow: 0 10px 30px -5px rgba(0, 0, 0, 0.1);
        }
    </style>
</head>
<body>
    <!-- 导航栏 -->
    <nav class="glass-effect fixed w-full top-0 z-50 border-b border-gray-200">
        <div class="max-w-7xl mx-auto px-4 sm:px-6 lg:px-8">
            <div class="flex justify-between h-16">
                <div class="flex items-center">
                    <a href="#" class="flex items-center space-x-2">
                        <div class="w-8 h-8 rounded-lg bg-gradient-to-r from-indigo-500 to-purple-500 flex items-center justify-center">
                            <i class="fas fa-language text-white"></i>
                        </div>
                        <span class="text-xl font-bold gradient-text">TranslateAI</span>
                    </a>
                </div>
                
                <div class="hidden md:flex items-center space-x-8">
                    <a href="#" class="nav-link text-gray-700 hover:text-indigo-600 font-medium" data-target="text-trans">
                        <i class="fas fa-text-width mr-2"></i>文本翻译
                    </a>
                    <a href="#" class="nav-link text-gray-700 hover:text-indigo-600 font-medium" data-target="file-trans">
                        <i class="fas fa-file-alt mr-2"></i>文件翻译
                    </a>
                    <a href="#" class="nav-link text-gray-700 hover:text-indigo-600 font-medium" data-target="about">
                        <i class="fas fa-info-circle mr-2"></i>关于我们
                    </a>
                </div>

                <div class="flex items-center md:hidden">
                    <button id="mobile-menu-btn" class="text-gray-500 hover:text-gray-700">
                        <i class="fas fa-bars text-xl"></i>
                    </button>
                </div>
            </div>
        </div>

        <!-- 移动端菜单 -->
        <div id="mobile-menu" class="hidden md:hidden animated fadeIn faster">
            <div class="glass-effect border-t border-gray-200 py-2">
                <a href="#" class="block px-4 py-3 text-gray-700 hover:bg-indigo-50 hover:text-indigo-600" data-target="text-trans">
                    <i class="fas fa-text-width mr-2"></i>文本翻译
                </a>
                <a href="#" class="block px-4 py-3 text-gray-700 hover:bg-indigo-50 hover:text-indigo-600" data-target="file-trans">
                    <i class="fas fa-file-alt mr-2"></i>文件翻译
                </a>
                <a href="#" class="block px-4 py-3 text-gray-700 hover:bg-indigo-50 hover:text-indigo-600" data-target="about">
                    <i class="fas fa-info-circle mr-2"></i>关于我们
                </a>
            </div>
        </div>
    </nav>

    <!-- 主要内容区域 -->
    <main class="pt-20 px-4 pb-12">
        <!-- 文本翻译页面 -->
        <div id="text-trans" class="page max-w-7xl mx-auto">
            <div class="mb-8">
                <h1 class="text-3xl font-bold gradient-text mb-2">智能文本翻译</h1>
                <p class="text-gray-600">支持多语言实时翻译,让沟通无国界</p>
            </div>

            <div class="flex flex-col lg:flex-row gap-6">
                <!-- 左侧工具栏 -->
                <div class="lg:w-64">
                    <div class="gradient-border bg-white p-6 space-y-6">
                        <div class="space-y-4">
                            <div>
                                <label class="block text-sm font-medium text-gray-700 mb-2">源语言</label>
                                <select id="source-lang" class="w-full rounded-lg border-gray-300 focus:border-indigo-500 focus:ring focus:ring-indigo-200">
                                    <option value="AUTO">自动检测</option>
                                    <option value="ZH">中文</option>
                                    <option value="EN">英语</option>
                                    <option value="JA">日语</option>
                                    <option value="KO">韩语</option>
                                    <option value="FR">法语</option>
                                    <option value="DE">德语</option>
                                    <option value="ES">西班牙语</option>
                                    <option value="RU">俄语</option>
                                    <option value="IT">意大利语</option>
                                    <option value="PT">葡萄牙语</option>
                                    <option value="VI">越南语</option>
                                    <option value="ID">印尼语</option>
                                    <option value="TH">泰语</option>
                                    <option value="MS">马来语</option>
                                    <option value="AR">阿拉伯语</option>
                                    <option value="HI">印地语</option>
                                    <!-- 其他语言选项 -->
                                </select>
                            </div>
                            <div>
                                <label class="block text-sm font-medium text-gray-700 mb-2">目标语言</label>
                                <select id="target-lang" class="w-full rounded-lg border-gray-300 focus:border-indigo-500 focus:ring focus:ring-indigo-200">
                                    <option value="ZH">中文</option>
                                    <option value="EN">英语</option>
                                    <option value="JA">日语</option>
                                    <option value="KO">韩语</option>
                                    <option value="FR">法语</option>
                                    <option value="DE">德语</option>
                                    <option value="ES">西班牙语</option>
                                    <option value="RU">俄语</option>
                                    <option value="IT">意大利语</option>
                                    <option value="PT">葡萄牙语</option>
                                    <option value="VI">越南语</option>
                                    <option value="ID">印尼语</option>
                                    <option value="TH">泰语</option>
                                    <option value="MS">马来语</option>
                                    <option value="AR">阿拉伯语</option>
                                    <option value="HI">印地语</option>
                                    <!-- 其他语言选项 -->
                                </select>
                            </div>
                        </div>

                        <button id="switch-lang" class="w-full py-2 px-4 rounded-lg border-2 border-indigo-500 text-indigo-600 hover:bg-indigo-50 transition-colors flex items-center justify-center space-x-2">
                            <i class="fas fa-exchange-alt"></i>
                            <span>切换语言</span>
                        </button>
                    </div>
                </div>

                <!-- 翻译区域 -->
                <div class="flex-1">
                    <div class="grid md:grid-cols-2 gap-6">
                        <!-- 源文本 -->
                        <div class="gradient-border bg-white p-6">
                            <div class="mb-4 flex items-center justify-between">
                                <span class="text-sm font-medium text-gray-700">原文</span>
                                <button id="clear-text" class="text-gray-400 hover:text-gray-600">
                                    <i class="fas fa-times"></i>
                                </button>
                            </div>
                            <textarea
                                id="source-text"
                                class="w-full h-48 p-4 border-0 focus:ring-0 resize-none rounded-lg bg-gray-50"
                                placeholder="请输入要翻译的文本..."
                            ></textarea>
                            <div class="mt-2 flex justify-between text-sm text-gray-500">
                                <span id="char-count">0/10000</span>
                                <!-- <button class="text-indigo-600 hover:text-indigo-700">
                                    <i class="fas fa-paste mr-1"></i>粘贴
                                </button> -->
                            </div>
                        </div>

                        <!-- 译文 -->
                        <div class="gradient-border bg-white p-6">
                            <div class="mb-4 flex items-center justify-between">
                                <span class="text-sm font-medium text-gray-700">译文</span>
                                <button id="copy-result" class="text-gray-400 hover:text-gray-600">
                                    <i class="fas fa-copy"></i>
                                </button>
                            </div>
                            <div id="target-text" class="w-full h-48 p-4 border-0 focus:ring-0 resize-none rounded-lg bg-gray-50 overflow-auto"></div>
                            <div class="mt-2 flex justify-end">
                                <div class="flex space-x-4 text-sm">
                                    <!-- <button class="text-indigo-600 hover:text-indigo-700">
                                        <i class="fas fa-volume-up mr-1"></i>朗读
                                    </button>
                                    <button class="text-indigo-600 hover:text-indigo-700">
                                        <i class="fas fa-star mr-1"></i>收藏
                                    </button> -->
                                </div>
                            </div>
                        </div>
                    </div>

                    <button id="translate-btn" class="mt-6 w-full py-4 bg-gradient-to-r from-indigo-500 to-purple-500 text-white rounded-lg hover:opacity-90 transition-opacity flex items-center justify-center space-x-2">
                        <i class="fas fa-language text-xl"></i>
                        <span class="text-lg font-medium">立即翻译</span>
                    </button>
                </div>
            </div>
        </div>

        <!-- 文件翻译页面 -->
        <div id="file-trans" class="page max-w-7xl mx-auto hidden">
            <div class="mb-8">
                <h1 class="text-3xl font-bold gradient-text mb-2">文档智能翻译</h1>
                <p class="text-gray-600">支持多种格式文档翻译,保留原文档排版</p>
            </div>

            <div class="flex flex-col lg:flex-row gap-6">
                <!-- 左侧工具栏 -->
                <div class="lg:w-64 space-y-6">
                    <!-- 语言选择 -->
                    <div class="gradient-border bg-white p-6 space-y-4">
                        <div>
                            <label class="block text-sm font-medium text-gray-700 mb-2">源语言</label>
                            <select id="file-source-lang" class="w-full rounded-lg border-gray-300 focus:border-indigo-500 focus:ring focus:ring-indigo-200">
                                <option value="AUTO">自动检测</option>
                                <option value="ZH">中文</option>
                                <option value="EN">英语</option>
                                <option value="JA">日语</option>
                                <option value="KO">韩语</option>
                                <option value="FR">法语</option>
                                <option value="DE">德语</option>
                                <option value="ES">西班牙语</option>
                                <option value="RU">俄语</option>
                                <option value="IT">意大利语</option>
                                <option value="PT">葡萄牙语</option>
                                <option value="VI">越南语</option>
                                <option value="ID">印尼语</option>
                                <option value="TH">泰语</option>
                                <option value="MS">马来语</option>
                                <option value="AR">阿拉伯语</option>
                                <option value="HI">印地语</option>
                            </select>
                        </div>
                        <div>
                            <label class="block text-sm font-medium text-gray-700 mb-2">目标语言</label>
                            <select id="file-target-lang" class="w-full rounded-lg border-gray-300 focus:border-indigo-500 focus:ring focus:ring-indigo-200">
                                <option value="ZH">中文</option>
                                <option value="EN">英语</option>
                                <option value="JA">日语</option>
                                <option value="KO">韩语</option>
                                <option value="FR">法语</option>
                                <option value="DE">德语</option>
                                <option value="ES">西班牙语</option>
                                <option value="RU">俄语</option>
                                <option value="IT">意大利语</option>
                                <option value="PT">葡萄牙语</option>
                                <option value="VI">越南语</option>
                                <option value="ID">印尼语</option>
                                <option value="TH">泰语</option>
                                <option value="MS">马来语</option>
                                <option value="AR">阿拉伯语</option>
                                <option value="HI">印地语</option>
                            </select>
                        </div>
                    </div>

                    <!-- 操作按钮 -->
                    <div class="gradient-border bg-white p-6 space-y-4">
                        <button id="upload-btn" class="w-full py-3 bg-gradient-to-r from-indigo-500 to-purple-500 text-white rounded-lg hover:opacity-90 transition-opacity flex items-center justify-center space-x-2">
                            <i class="fas fa-cloud-upload-alt"></i>
                            <span>上传文件</span>
                        </button>
                        <button id="file-translate-btn" class="w-full py-3 bg-gradient-to-r from-indigo-500 to-purple-500 text-white rounded-lg hover:opacity-90 transition-opacity flex items-center justify-center space-x-2" disabled>
                            <i class="fas fa-language"></i>
                            <span>开始翻译</span>
                        </button>
                        <button id="export-btn" class="w-full py-3 bg-gradient-to-r from-indigo-500 to-purple-500 text-white rounded-lg hover:opacity-90 transition-opacity flex items-center justify-center space-x-2" disabled>
                            <i class="fas fa-download"></i>
                            <span>导出文档</span>
                        </button>
                    </div>

                    <!-- 翻译进度 -->
                    <div id="progress-panel" class="gradient-border bg-white p-6 hidden">
                        <h3 class="text-sm font-medium text-gray-700 mb-4">翻译进度</h3>
                        <div class="space-y-4">
                            <div class="flex justify-between text-sm">
                                <span>总段落数</span>
                                <span id="total-segments">0</span>
                            </div>
                            <div class="flex justify-between text-sm">
                                <span>已翻译</span>
                                <span id="translated-segments">0</span>
                            </div>
                            <div class="h-2 bg-gray-100 rounded-full overflow-hidden">
                                <div id="progress-bar" class="h-full bg-gradient-to-r from-indigo-500 to-purple-500 progress-bar-animation w-0"></div>
                            </div>
                        </div>
                    </div>
                </div>

                <!-- 文件内容区域 -->
                <div class="flex-1">
                    <!-- 上传区域 -->
                    <div id="upload-zone" class="gradient-border bg-white h-96 flex flex-col items-center justify-center cursor-pointer group">
                        <div class="text-center p-8 rounded-2xl">
                            <div class="w-20 h-20 mx-auto mb-6 floating">
                                <i class="fas fa-cloud-upload-alt text-6xl text-indigo-500 group-hover:text-indigo-600"></i>
                            </div>
                            <h3 class="text-xl font-medium text-gray-700 mb-2">拖放文件到这里或点击上传</h3>
                            <p class="text-gray-500">支持 TXT、DOCX、PDF、Markdown 格式</p>
                            <p class="text-sm text-gray-400 mt-2">最大支持 20MB</p>
                        </div>
                    </div>

                    <!-- 文档预览 -->
                    <div id="file-preview" class="hidden">
                        <div class="gradient-border bg-white">
                            <div class="border-b border-gray-200 p-4 flex justify-between items-center">
                                <div class="flex items-center space-x-3">
                                    <i class="fas fa-file-alt text-indigo-500 text-xl"></i>
                                    <span id="file-name" class="font-medium"></span>
                                </div>
                                <button id="close-preview" class="text-gray-400 hover:text-gray-600">
                                    <i class="fas fa-times"></i>
                                </button>
                            </div>
                            <div class="p-6">
                                <div class="grid md:grid-cols-2 gap-6">
                                    <div>
                                        <h3 class="text-sm font-medium text-gray-700 mb-4 flex items-center">
                                            <i class="fas fa-file-alt mr-2 text-indigo-500"></i>原文
                                        </h3>
                                        <div id="file-content" class="space-y-4"></div>
                                    </div>
                                    <div>
                                        <h3 class="text-sm font-medium text-gray-700 mb-4 flex items-center">
                                            <i class="fas fa-language mr-2 text-indigo-500"></i>译文
                                        </h3>
                                        <div id="file-translation" class="space-y-4"></div>
                                    </div>
                                </div>
                            </div>
                        </div>
                    </div>
                </div>
            </div>
        </div>

        <!-- About页面 -->
        <div id="about" class="page max-w-7xl mx-auto hidden">
            <div class="mb-12 text-center">
                <h1 class="text-4xl font-bold gradient-text mb-4">关于 TranslateAI</h1>
                <p class="text-xl text-gray-600 max-w-2xl mx-auto">
                    我们致力于打造最智能、最准确的翻译助手,让语言不再成为沟通的障碍
                </p>
            </div>

            <!-- 特性展示 -->
            <div class="grid md:grid-cols-3 gap-8 mb-16">
                <div class="card-hover gradient-border bg-white p-6 rounded-xl text-center">
                    <div class="w-16 h-16 mx-auto mb-6 rounded-full bg-indigo-100 flex items-center justify-center">
                        <i class="fas fa-brain text-2xl text-indigo-600"></i>
                    </div>
                    <h3 class="text-xl font-semibold mb-4">AI 智能翻译</h3>
                    <p class="text-gray-600">采用先进的人工智能技术,提供准确、流畅的翻译服务</p>
                </div>

                <div class="card-hover gradient-border bg-white p-6 rounded-xl text-center">
                    <div class="w-16 h-16 mx-auto mb-6 rounded-full bg-purple-100 flex items-center justify-center">
                        <i class="fas fa-file-alt text-2xl text-purple-600"></i>
                    </div>
                    <h3 class="text-xl font-semibold mb-4">多格式支持</h3>
                    <p class="text-gray-600">支持txt、docx、pdf等多种文件格式,保留原文档排版</p>
                </div>

                <div class="card-hover gradient-border bg-white p-6 rounded-xl text-center">
                    <div class="w-16 h-16 mx-auto mb-6 rounded-full bg-pink-100 flex items-center justify-center">
                        <i class="fas fa-globe text-2xl text-pink-600"></i>
                    </div>
                    <h3 class="text-xl font-semibold mb-4">多语言支持</h3>
                    <p class="text-gray-600">支持全球100+种语言互译,满足各类翻译需求</p>
                </div>
            </div>

            <!-- 使用统计 -->
            <div class="grid md:grid-cols-4 gap-6 mb-16">
                <div class="gradient-border bg-white p-6 rounded-xl text-center">
                    <div class="text-3xl font-bold gradient-text mb-2">100+</div>
                    <div class="text-gray-600">支持语言</div>
                </div>
                <div class="gradient-border bg-white p-6 rounded-xl text-center">
                    <div class="text-3xl font-bold gradient-text mb-2">99%</div>
                    <div class="text-gray-600">翻译准确率</div>
                </div>
                <div class="gradient-border bg-white p-6 rounded-xl text-center">
                    <div class="text-3xl font-bold gradient-text mb-2">1M+</div>
                    <div class="text-gray-600">用户数量</div>
                </div>
                <div class="gradient-border bg-white p-6 rounded-xl text-center">
                    <div class="text-3xl font-bold gradient-text mb-2">10M+</div>
                    <div class="text-gray-600">日翻译量</div>
                </div>
            </div>

            <!-- 联系我们 -->
            <div class="gradient-border bg-white p-8 rounded-xl text-center">
                <h2 class="text-2xl font-bold mb-6">联系我们</h2>
                <div class="flex justify-center space-x-8">
                    <a href="#" class="text-gray-600 hover:text-indigo-600 transition-colors">
                        <i class="fab fa-github text-2xl"></i>
                    </a>
                    <a href="#" class="text-gray-600 hover:text-indigo-600 transition-colors">
                        <i class="fab fa-twitter text-2xl"></i>
                    </a>
                    <a href="#" class="text-gray-600 hover:text-indigo-600 transition-colors">
                        <i class="fas fa-envelope text-2xl"></i>
                    </a>
                </div>
            </div>
        </div>
    </main>

    <!-- 导出设置模态框 -->
    <div id="export-modal" class="fixed inset-0 z-50 hidden">
        <div class="absolute inset-0 bg-gray-500 bg-opacity-75"></div>
        <div class="fixed inset-0 z-10 overflow-y-auto">
            <div class="flex min-h-full items-end justify-center p-4 sm:items-center">
                <div class="relative gradient-border bg-white w-full max-w-md p-6 rounded-xl">
                    <h3 class="text-lg font-medium text-gray-900 mb-4">导出设置</h3>
                    <div class="space-y-4">
                        <div>
                            <label class="block text-sm font-medium text-gray-700 mb-2">导出格式</label>
                            <select id="export-format" class="w-full rounded-lg border-gray-300 focus:border-indigo-500 focus:ring focus:ring-indigo-200">
                                <option value="txt">纯文本 (TXT)</option>
                                <option value="docx">Word文档 (DOCX)</option>
                                <option value="md">Markdown (MD)</option>
                                <option value="html">网页 (HTML)</option>
                            </select>
                        </div>
                        <div>
                            <label class="block text-sm font-medium text-gray-700 mb-2">导出模式</label>
                            <div class="space-y-2">
                                <label class="inline-flex items-center">
                                    <input type="radio" name="export-mode" value="translated" class="text-indigo-600">
                                    <span class="ml-2">仅译文</span>
                                </label>
                                <label class="inline-flex items-center ml-4">
                                    <input type="radio" name="export-mode" value="parallel" class="text-indigo-600">
                                    <span class="ml-2">对照模式</span>
                                </label>
                            </div>
                        </div>
                    </div>
                    <div class="mt-6 flex justify-end space-x-3">
                        <button id="cancel-export" class="px-4 py-2 border border-gray-300 rounded-lg text-gray-700 hover:bg-gray-50">
                            取消
                        </button>
                        <button id="confirm-export" class="px-4 py-2 bg-gradient-to-r from-indigo-500 to-purple-500 text-white rounded-lg hover:opacity-90">
                            导出
                        </button>
                    </div>
                </div>
            </div>
        </div>
    </div>
    <script>
        // 常量定义
const API_ENDPOINTS = {
    TRANSLATE_TEXT: '/translate_text',
    UPLOAD_FILE: '/upload',
    TRANSLATE_FILE: '/translate',
    EXPORT: '/export'
};

// 工具函数
const utils = {
    showError(message) {
        // 简单的错误提示
        alert(message);
    },
    
    async copyToClipboard(text) {
        try {
            await navigator.clipboard.writeText(text);
            return true;
        } catch (err) {
            console.error('Copy failed:', err);
            return false;
        }
    },
    
    formatBytes(bytes) {
        if (bytes === 0) return '0 B';
        const k = 1024;
        const sizes = ['B', 'KB', 'MB', 'GB'];
        const i = Math.floor(Math.log(bytes) / Math.log(k));
        return `${parseFloat((bytes / Math.pow(k, i)).toFixed(2))} ${sizes[i]}`;
    }
};

// API封装
const api = {
    async translateText(text, sourceLang, targetLang) {
        try {
            const response = await fetch(API_ENDPOINTS.TRANSLATE_TEXT, {
                method: 'POST',
                headers: {
                    'Content-Type': 'application/json',
                },
                body: JSON.stringify({
                    text,
                    source_lang: sourceLang,
                    target_lang: targetLang
                })
            });
            
            if (!response.ok) {
                throw new Error(`HTTP error! status: ${response.status}`);
            }
            
            const data = await response.json();
            return data;
        } catch (error) {
            console.error('Translation failed:', error);
            throw error;
        }
    },

    async uploadFile(file, sourceLang, targetLang) {
        const formData = new FormData();
        formData.append('file', file);
        formData.append('source_lang', sourceLang);
        formData.append('target_lang', targetLang);

        try {
            const response = await fetch(API_ENDPOINTS.UPLOAD_FILE, {
                method: 'POST',
                body: formData
            });
            
            if (!response.ok) {
                throw new Error(`HTTP error! status: ${response.status}`);
            }
            
            return await response.json();
        } catch (error) {
            console.error('File upload failed:', error);
            throw error;
        }
    },

    async translateFile(segments, sourceLang, targetLang) {
        try {
            const response = await fetch(API_ENDPOINTS.TRANSLATE_FILE, {
                method: 'POST',
                headers: {
                    'Content-Type': 'application/json',
                },
                body: JSON.stringify({
                    segments,
                    source_lang: sourceLang,
                    target_lang: targetLang
                })
            });
            
            if (!response.ok) {
                throw new Error(`HTTP error! status: ${response.status}`);
            }
            
            return await response.json();
        } catch (error) {
            console.error('File translation failed:', error);
            throw error;
        }
    },

    async exportDocument(segments, format, mode, sourceFileType) {
        try {
            const response = await fetch(API_ENDPOINTS.EXPORT, {
                method: 'POST',
                headers: {
                    'Content-Type': 'application/json',
                },
                body: JSON.stringify({
                    segments,
                    format,
                    mode,
                    source_file_type: sourceFileType
                })
            });
            
            if (!response.ok) {
                throw new Error(`HTTP error! status: ${response.status}`);
            }
            
            return await response.blob();
        } catch (error) {
            console.error('Export failed:', error);
            throw error;
        }
    }
};

// 文本翻译页面类
class TextTranslation {
    constructor() {
        this.sourceText = document.getElementById('source-text');
        this.targetText = document.getElementById('target-text');
        this.translateBtn = document.getElementById('translate-btn');
        this.sourceLang = document.getElementById('source-lang');
        this.targetLang = document.getElementById('target-lang');
        this.charCount = document.getElementById('char-count');
        this.clearBtn = document.getElementById('clear-text');
        this.copyBtn = document.getElementById('copy-result');
        this.switchBtn = document.getElementById('switch-lang');
        
        this.init();
    }

    init() {
        this.bindEvents();
        this.updateCharCount();
    }

    bindEvents() {
        this.sourceText.addEventListener('input', () => this.updateCharCount());
        this.translateBtn.addEventListener('click', () => this.translate());
        this.clearBtn.addEventListener('click', () => this.clearText());
        this.copyBtn.addEventListener('click', () => this.copyResult());
        this.switchBtn.addEventListener('click', () => this.switchLanguages());
    }

    updateCharCount() {
        const count = this.sourceText.value.length;
        this.charCount.textContent = `${count}/10000`;
        this.translateBtn.disabled = count === 0;
    }

    clearText() {
        this.sourceText.value = '';
        this.targetText.textContent = '';
        this.updateCharCount();
    }

    async copyResult() {
        const success = await utils.copyToClipboard(this.targetText.textContent);
        if (success) {
            this.copyBtn.textContent = '已复制';
            setTimeout(() => {
                this.copyBtn.textContent = '复制结果';
            }, 2000);
        }
    }

    switchLanguages() {
        if (this.sourceLang.value === 'auto') return;
        [this.sourceLang.value, this.targetLang.value] = 
        [this.targetLang.value, this.sourceLang.value];
    }

    async translate() {
        if (!this.sourceText.value.trim()) return;
        
        this.translateBtn.disabled = true;
        try {
            const result = await api.translateText(
                this.sourceText.value,
                this.sourceLang.value,
                this.targetLang.value
            );
            
            this.targetText.textContent = result.translated;
        } catch (error) {
            utils.showError('翻译失败,请稍后重试');
        } finally {
            this.translateBtn.disabled = false;
        }
    }
}

// 文件翻译页面类
class FileTranslation {
    constructor() {
        this.uploadZone = document.getElementById('upload-zone');
        this.filePreview = document.getElementById('file-preview');
        this.uploadBtn = document.getElementById('upload-btn');
        this.translateBtn = document.getElementById('file-translate-btn');
        this.exportBtn = document.getElementById('export-btn');
        this.progressPanel = document.getElementById('progress-panel');
        this.closePreviewBtn = document.getElementById('close-preview');
        
        this.sourceLang = document.getElementById('file-source-lang');
        this.targetLang = document.getElementById('file-target-lang');
        
        this.currentFile = null;
        this.segments = [];
        
        this.init();
    }

    init() {
        this.bindEvents();
        this.initDragDrop();
    }

    bindEvents() {
        this.uploadBtn.addEventListener('click', () => this.triggerFileInput());
        this.translateBtn.addEventListener('click', () => this.translateFile());
        this.exportBtn.addEventListener('click', () => this.showExportModal());
        this.closePreviewBtn.addEventListener('click', () => this.closePreview());
        
        // 导出模态框事件
        document.getElementById('confirm-export').addEventListener('click', () => this.exportFile());
        document.getElementById('cancel-export').addEventListener('click', () => this.hideExportModal());
    }

    initDragDrop() {
        this.uploadZone.addEventListener('dragover', (e) => {
            e.preventDefault();
            e.stopPropagation();
            this.uploadZone.classList.add('border-purple-600');
        });

        this.uploadZone.addEventListener('dragleave', (e) => {
            e.preventDefault();
            e.stopPropagation();
            this.uploadZone.classList.remove('border-purple-600');
        });

        this.uploadZone.addEventListener('drop', async (e) => {
            e.preventDefault();
            e.stopPropagation();
            this.uploadZone.classList.remove('border-purple-600');
            
            const file = e.dataTransfer.files[0];
            await this.handleFile(file);
        });
    }

    triggerFileInput() {
        const input = document.createElement('input');
        input.type = 'file';
        input.accept = '.txt,.docx,.pdf,.md';
        input.onchange = (e) => this.handleFile(e.target.files[0]);
        input.click();
    }

    async handleFile(file) {
        if (!file) return;
        
        const validTypes = [
            'text/plain',
            'application/vnd.openxmlformats-officedocument.wordprocessingml.document',
            'application/pdf',
            'text/markdown'
        ];
        
        if (!validTypes.includes(file.type)) {
            utils.showError('不支持的文件格式');
            return;
        }

        this.currentFile = file;
        try {
            const result = await api.uploadFile(
                file,
                this.sourceLang.value,
                this.targetLang.value
            );
            
            this.segments = result.segments;
            this.updatePreview();
            this.translateBtn.disabled = false;
            this.showProgressPanel();
        } catch (error) {
            utils.showError('文件上传失败,请重试');
        }
    }

    updatePreview() {
        this.uploadZone.classList.add('hidden');
        this.filePreview.classList.remove('hidden');
        
        document.getElementById('file-name').textContent = this.currentFile.name;
        
        const contentDiv = document.getElementById('file-content');
        contentDiv.innerHTML = this.segments.map((segment, index) => `
            <div class="p-4 bg-gray-50 rounded">
                <div class="text-gray-900">${segment.text}</div>
                ${segment.type === 'heading' ? '<div class="text-xs text-gray-500 mt-1">标题</div>' : ''}
            </div>
        `).join('');
    }

    async translateFile() {
        if (!this.segments.length) return;
        
        this.translateBtn.disabled = true;
        try {
            const result = await api.translateFile(
                this.segments,
                this.sourceLang.value,
                this.targetLang.value
            );
            
            this.segments = result.segments;
            this.updateTranslations();
            this.exportBtn.disabled = false;
            this.updateProgress();
        } catch (error) {
            utils.showError('翻译失败,请重试');
        } finally {
            this.translateBtn.disabled = false;
        }
    }

    updateTranslations() {
        const translationDiv = document.getElementById('file-translation');
        translationDiv.innerHTML = this.segments.map((segment, index) => `
            <div class="p-4 bg-gray-50 rounded">
                <div class="text-gray-900">${segment.translated || ''}</div>
                ${segment.confidence ? `
                    <div class="mt-2 h-1 bg-gray-200 rounded-full overflow-hidden">
                        <div class="h-full bg-purple-600" style="width: ${segment.confidence * 100}%"></div>
                    </div>
                ` : ''}
            </div>
        `).join('');
    }

    showProgressPanel() {
        this.progressPanel.classList.remove('hidden');
        this.updateProgress();
    }

    updateProgress() {
        const total = this.segments.length;
        const translated = this.segments.filter(s => s.translated).length;
        
        document.getElementById('total-segments').textContent = total;
        document.getElementById('translated-segments').textContent = translated;
        document.getElementById('progress-bar').style.width = `${(translated / total * 100)}%`;
    }

    closePreview() {
        this.uploadZone.classList.remove('hidden');
        this.filePreview.classList.add('hidden');
        this.progressPanel.classList.add('hidden');
        this.translateBtn.disabled = true;
        this.exportBtn.disabled = true;
        this.currentFile = null;
        this.segments = [];
    }

    showExportModal() {
        document.getElementById('export-modal').classList.remove('hidden');
    }

    hideExportModal() {
        document.getElementById('export-modal').classList.add('hidden');
    }

    async exportFile() {
    const formatSelect = document.getElementById('export-format');
    const selectedFormat = formatSelect.value;
    const mode = document.querySelector('input[name="export-mode"]:checked').value;

    // 确定最终使用的导出格式
    let exportFormat;
    if (selectedFormat === 'auto') {
        // 如果选择"自动",则使用原文件格式
        exportFormat = this.currentFile.name.split('.').pop();
    } else {
        // 否则使用用户选择的格式
        exportFormat = selectedFormat;
    }

    try {
        const blob = await api.exportDocument(
            this.segments,
            exportFormat,
            mode,
            this.currentFile.name.split('.').pop() // 原文件类型仍然需要传递给后端
        );

        // 根据选择的格式确定文件扩展名
        let fileExtension = exportFormat;
        if (exportFormat === 'auto') {
            fileExtension = this.currentFile.name.split('.').pop();
        }

        // 创建新的文件名
        const originalName = this.currentFile.name.split('.')[0];
        const newFileName = `translated_${originalName}.${fileExtension}`;

        const url = URL.createObjectURL(blob);
        const a = document.createElement('a');
        a.href = url;
        a.download = newFileName;
        document.body.appendChild(a);
        a.click();
        document.body.removeChild(a);
        URL.revokeObjectURL(url);
        
        this.hideExportModal();
    } catch (error) {
        utils.showError('导出失败,请重试');
    }
}
}

// 页面导航控制类
class Navigation {
    constructor() {
        // 获取所有导航链接(包括桌面端和移动端)
        this.navLinks = document.querySelectorAll('a[data-target="text-trans"], a[data-target="file-trans"], a[data-target="about"]');
        this.mobileMenuBtn = document.getElementById('mobile-menu-btn');
        this.mobileMenu = document.getElementById('mobile-menu');
        this.pages = {
            'text-trans': document.getElementById('text-trans'),
            'file-trans': document.getElementById('file-trans'),
            'about': document.getElementById('about')
        };
        
        this.init();
    }

    init() {
        this.bindEvents();
        // 默认显示文本翻译页面
        this.switchPage('text-trans');
    }

    bindEvents() {
        // 移动端菜单切换
        this.mobileMenuBtn.addEventListener('click', () => {
            this.mobileMenu.classList.toggle('hidden');
        });
        
        // 为所有导航链接添加点击事件
        this.navLinks.forEach(link => {
            link.addEventListener('click', (e) => {
                e.preventDefault();
                const target = link.getAttribute('data-target');
                this.switchPage(target);
                // 如果是移动端,点击后关闭菜单
                if(!this.mobileMenu.classList.contains('hidden')) {
                    this.mobileMenu.classList.add('hidden');
                }
            });
        });
    }

    switchPage(pageId) {
        // 隐藏所有页面
        Object.values(this.pages).forEach(page => {
            page.classList.add('hidden');
        });
        
        // 显示目标页面
        if(this.pages[pageId]) {
            this.pages[pageId].classList.remove('hidden');
        }
        
        // 更新导航链接状态
        this.navLinks.forEach(link => {
            const isActive = link.getAttribute('data-target') === pageId;
            link.classList.toggle('text-indigo-600', isActive);
            link.classList.toggle('text-gray-700', !isActive);
        });
    }
}
// 初始化应用
document.addEventListener('DOMContentLoaded', () => {
    new Navigation();
    new TextTranslation();
    new FileTranslation();
});
    </script>
</body>
</html>