diff --git a/app/api/dify-dataset/api/documentApi.ts b/app/api/dify-dataset/api/documentApi.ts
index 9f69f0f..fd9fc8c 100644
--- a/app/api/dify-dataset/api/documentApi.ts
+++ b/app/api/dify-dataset/api/documentApi.ts
@@ -225,6 +225,44 @@ export async function fetchUploadFileInfo(
     return response.data;
 }
 
+/**
+ * 下载文档原始文件
+ * 通过代理路由下载 Dify 知识库中的原始文件
+ *
+ * @param uploadFileInfo - 上传文件信息（从 fetchUploadFileInfo 获取）
+ * @returns File 对象
+ */
+export async function downloadOriginalFile(
+    uploadFileInfo: UploadFileInfo
+): Promise<File> {
+    if (!uploadFileInfo.download_url) {
+        throw new Error('无法获取原始文件下载地址');
+    }
+
+    // download_url 格式: /files/xxx/file-preview?...
+    // 转换为代理路由: /api/dataset/dify-files/xxx/file-preview?...
+    const downloadPath = uploadFileInfo.download_url.replace(/^\/files\//, '');
+    const proxyUrl = `${API_URL}/dify-files/${downloadPath}`;
+
+    console.log('[Dataset Client] 下载原始文件:', {
+        originalUrl: uploadFileInfo.download_url,
+        proxyUrl,
+    });
+
+    const response = await axios.get(proxyUrl, {
+        responseType: 'blob',
+        withCredentials: true,
+    });
+
+    const file = new File(
+        [response.data],
+        uploadFileInfo.name || 'document',
+        { type: uploadFileInfo.mime_type || 'application/octet-stream' }
+    );
+
+    return file;
+}
+
 /**
  * 预处理规则 ID
  */
@@ -244,6 +282,7 @@ export interface PreProcessingRule {
 export interface SegmentationConfig {
     separator: string;
     max_tokens: number;
+    chunk_overlap?: number;
 }
 
 /**
diff --git a/app/components/dify-dataset-manager/document-detail.tsx b/app/components/dify-dataset-manager/document-detail.tsx
index a59fc8b..a087490 100644
--- a/app/components/dify-dataset-manager/document-detail.tsx
+++ b/app/components/dify-dataset-manager/document-detail.tsx
@@ -3,12 +3,12 @@ import {
     Button,
     InputNumber,
     Checkbox,
-    Select,
     Card,
     Empty,
     Spin,
     Divider,
     Tooltip,
+    Progress,
 } from 'antd';
 import {
     QuestionCircleOutlined,
@@ -17,6 +17,7 @@ import {
 } from '@ant-design/icons';
 import { useDocumentDetail } from '~/hooks/dify-dataset-manager/document-detail';
 import type { DocumentDetailProps } from '~/types/dify-dataset-manager/document-detail';
+import { INDEXING_STATUS_CONFIG } from '~/types/dify-dataset-manager/document-detail';
 
 /**
  * 文档详情组件
@@ -32,6 +33,8 @@ export default function DocumentDetail({
         previewLoading,
         showPreview,
         saving,
+        isProcessing,
+        indexingStatus,
         updateSettings,
         handleReset,
         handlePreview,
@@ -56,7 +59,7 @@ export default function DocumentDetail({
                         <h3 className="section-title">分段设置</h3>
 
                         {/* 分块模式 */}
-                        <div className="setting-item mode-selector">
+                        {/* <div className="setting-item mode-selector">
                             <div className="mode-option active">
                                 <div className="mode-icon">
                                     <i className="ri-text-spacing"></i>
@@ -66,13 +69,13 @@ export default function DocumentDetail({
                                     <span className="mode-desc">通用文本分块模式，检索和召回的块是相同的</span>
                                 </div>
                             </div>
-                        </div>
+                        </div> */}
 
                         {/* 分段标识符 */}
                         <div className="setting-item">
                             <label className="setting-label">
                                 分段标识符
-                                <Tooltip title="系统会在遇到指定分隔符时自动分段，默认值为 \n\n（按段落分段）">
+                                <Tooltip title="分隔符是用于分隔文本的字符。\n\n和 \n 是常用于分隔段落和行的分隔符。用逗号连接分隔符(\n\n,\n)当段落超过最大块长度时，会按行进行分割。你也可以使用自定义的特殊分隔符(例如 ***)">
                                     <QuestionCircleOutlined className="help-icon" />
                                 </Tooltip>
                             </label>
@@ -80,6 +83,7 @@ export default function DocumentDetail({
                                 value={settings.separator}
                                 onChange={(e) => updateSettings('separator', e.target.value)}
                                 placeholder="\n\n"
+                                disabled={isProcessing}
                                 className="setting-input"
                             />
                         </div>
@@ -98,6 +102,28 @@ export default function DocumentDetail({
                                     onChange={(value) => updateSettings('maxTokens', value || 500)}
                                     min={100}
                                     max={4000}
+                                    disabled={isProcessing}
+                                    className="setting-input-number"
+                                />
+                                <span className="input-suffix">characters</span>
+                            </div>
+                        </div>
+
+                        {/* 分段重叠长度 */}
+                        <div className="setting-item">
+                            <label className="setting-label">
+                                分段重叠长度
+                                <Tooltip title="设置分段之间的重叠长度可以保留分段之间的语义关系，提升召回效果建议设置为最大分段长度的10%-25%">
+                                    <QuestionCircleOutlined className="help-icon" />
+                                </Tooltip>
+                            </label>
+                            <div className="setting-input-with-suffix">
+                                <InputNumber
+                                    value={settings.chunkOverlap}
+                                    onChange={(value) => updateSettings('chunkOverlap', value || 50)}
+                                    min={0}
+                                    max={500}
+                                    disabled={isProcessing}
                                     className="setting-input-number"
                                 />
                                 <span className="input-suffix">characters</span>
@@ -115,6 +141,7 @@ export default function DocumentDetail({
                             <Checkbox
                                 checked={settings.removeExtraSpaces}
                                 onChange={(e) => updateSettings('removeExtraSpaces', e.target.checked)}
+                                disabled={isProcessing}
                             >
                                 替换掉连续的空格、换行符和制表符
                             </Checkbox>
@@ -122,6 +149,7 @@ export default function DocumentDetail({
                             <Checkbox
                                 checked={settings.removeUrlsEmails}
                                 onChange={(e) => updateSettings('removeUrlsEmails', e.target.checked)}
+                                disabled={isProcessing}
                             >
                                 删除所有 URL 和电子邮件地址
                             </Checkbox>
@@ -130,27 +158,25 @@ export default function DocumentDetail({
 
                     <Divider />
 
-                    {/* Q&A 分段 */}
+                    {/* 索引方式 */}
                     <div className="settings-section">
-                        <div className="qa-segment-row">
-                            <Checkbox
-                                checked={settings.useQASegment}
-                                onChange={(e) => updateSettings('useQASegment', e.target.checked)}
+                        <h3 className="section-title">索引方式</h3>
+                        <div className="index-options">
+                            <div
+                                className={`index-option ${settings.indexingTechnique === 'high_quality' ? 'active' : ''} ${isProcessing ? 'disabled' : ''}`}
+                                onClick={() => !isProcessing && updateSettings('indexingTechnique', 'high_quality')}
                             >
-                                使用 Q&A 分段，语言
-                            </Checkbox>
-                            <Select
-                                value={settings.qaLanguage}
-                                onChange={(value) => updateSettings('qaLanguage', value)}
-                                disabled={!settings.useQASegment}
-                                style={{ width: 120 }}
-                                options={[
-                                    { value: 'Chinese', label: 'Chinese' },
-                                    { value: 'English', label: 'English' },
-                                    { value: 'Japanese', label: 'Japanese' },
-                                    { value: 'Korean', label: 'Korean' },
-                                ]}
-                            />
+                                <span className="option-radio"></span>
+                                <span className="option-label">高质量</span>
+                                <span className="option-badge recommended">推荐</span>
+                            </div>
+                            <div
+                                className={`index-option ${settings.indexingTechnique === 'economy' ? 'active' : ''} ${isProcessing ? 'disabled' : ''}`}
+                                onClick={() => !isProcessing && updateSettings('indexingTechnique', 'economy')}
+                            >
+                                <span className="option-radio"></span>
+                                <span className="option-label">经济</span>
+                            </div>
                         </div>
                     </div>
 
@@ -160,12 +186,14 @@ export default function DocumentDetail({
                             icon={<EyeOutlined />}
                             onClick={handlePreview}
                             loading={previewLoading}
+                            disabled={isProcessing}
                         >
                             预览块
                         </Button>
                         <Button
                             icon={<ReloadOutlined />}
                             onClick={handleReset}
+                            disabled={isProcessing}
                         >
                             重置
                         </Button>
@@ -179,12 +207,10 @@ export default function DocumentDetail({
                             type="primary"
                             onClick={handleSaveAndProcess}
                             loading={saving}
+                            disabled={isProcessing}
                             block
                         >
-                            保存并处理
-                        </Button>
-                        <Button block style={{ marginTop: 8 }}>
-                            取消
+                            {isProcessing ? '处理中...' : '保存并处理'}
                         </Button>
                     </div>
                 </div>
@@ -195,12 +221,7 @@ export default function DocumentDetail({
                         title={
                             <div className="preview-header">
                                 <span>预览</span>
-                                <Select
-                                    value={document.name}
-                                    style={{ width: 200 }}
-                                    disabled
-                                    options={[{ value: document.name, label: document.name }]}
-                                />
+                                <div>{document.name}</div>
                                 <span className="segment-count">
                                     {showPreview ? `${previewSegments.length} 段块` : '0 段块'}
                                 </span>
@@ -208,36 +229,59 @@ export default function DocumentDetail({
                         }
                         className="preview-card"
                     >
-                        {previewLoading ? (
-                            <div className="preview-loading">
-                                <Spin size="large" />
-                                <div className="loading-text">加载中...</div>
-                            </div>
-                        ) : !showPreview ? (
-                            <div className="preview-empty">
-                                <div className="empty-icon">
-                                    <EyeOutlined />
+                        {/* 处理进度显示 */}
+                        {isProcessing && indexingStatus && (
+                            <div className="processing-status">
+                                <div className="processing-title">
+                                    <Spin size="small" />
+                                    <span>正在处理文档...</span>
+                                </div>
+                                <Progress
+                                    percent={INDEXING_STATUS_CONFIG[indexingStatus]?.percent || 0}
+                                    status="active"
+                                    strokeColor={{ '0%': '#00684a', '100%': '#52c41a' }}
+                                />
+                                <div className="status-text">
+                                    {INDEXING_STATUS_CONFIG[indexingStatus]?.text || '处理中...'}
                                 </div>
-                                <p>点击左侧的"预览块"按钮来预览</p>
                             </div>
-                        ) : previewSegments.length === 0 ? (
-                            <Empty description="暂无分段数据" />
-                        ) : (
-                            <div className="preview-segments">
-                                {previewSegments.map((segment, index) => (
-                                    <div key={segment.id} className="segment-item">
-                                        <div className="segment-header">
-                                            <span className="segment-index">#{index + 1}</span>
-                                            <span className="segment-chars">
-                                                {segment.word_count} 字符
-                                            </span>
-                                        </div>
-                                        <div className="segment-content">
-                                            {segment.content}
-                                        </div>
+                        )}
+
+                        {/* 预览内容 */}
+                        {!isProcessing && (
+                            <>
+                                {previewLoading ? (
+                                    <div className="preview-loading">
+                                        <Spin size="large" />
+                                        <div className="loading-text">加载中...</div>
                                     </div>
-                                ))}
-                            </div>
+                                ) : !showPreview ? (
+                                    <div className="preview-empty">
+                                        <div className="empty-icon">
+                                            <EyeOutlined />
+                                        </div>
+                                        <p>点击左侧的"预览块"按钮来预览</p>
+                                    </div>
+                                ) : previewSegments.length === 0 ? (
+                                    <Empty description="暂无分段数据" />
+                                ) : (
+                                    <div className="preview-segments">
+                                        {previewSegments.map((segment, index) => (
+                                            <div key={segment.id} className="segment-item">
+                                                <div className="segment-header">
+                                                    <span className="segment-index">#{index + 1}</span>
+                                                    <span className="segment-chars">
+                                                        {segment.word_count} 字符
+                                                    </span>
+                                                </div>
+                                                <div className="segment-content">
+                                                    {segment.content}
+                                                </div>
+                                            </div>
+                                        ))}
+                                    </div>
+                                )}
+                            </>
                         )}
                     </Card>
                 </div>
diff --git a/app/components/dify-dataset-manager/document-list.tsx b/app/components/dify-dataset-manager/document-list.tsx
index 4da0c78..8ba10e4 100644
--- a/app/components/dify-dataset-manager/document-list.tsx
+++ b/app/components/dify-dataset-manager/document-list.tsx
@@ -1,29 +1,29 @@
 import {
-    Button,
-    Input,
-    Table,
-    Tag,
-    Space,
-    Tooltip,
-    Popconfirm,
-    Switch,
-    Empty,
-    Spin,
-} from 'antd';
-import {
-    SearchOutlined,
-    ReloadOutlined,
+    CloudUploadOutlined,
     DeleteOutlined,
     FileTextOutlined,
-    CloudUploadOutlined,
-    EyeOutlined,
+    ReloadOutlined,
+    SearchOutlined,
+    UnorderedListOutlined
 } from '@ant-design/icons';
+import {
+    Button,
+    Empty,
+    Input,
+    Popconfirm,
+    Space,
+    Spin,
+    Switch,
+    Table,
+    Tag,
+    Tooltip,
+} from 'antd';
 import type { ColumnsType } from 'antd/es/table';
 import type { Document, IndexingStatus } from '~/api/dify-dataset/type/documentTypes';
 import { useDocumentList } from '~/hooks/dify-dataset-manager/document-list';
 import type { DocumentListProps } from '~/types/dify-dataset-manager/document-list';
-import DocumentUpload from './document-upload';
 import '../../styles/components/dify-dataset-manager/index.css';
+import DocumentUpload from './document-upload';
 
 /**
  * 文档列表组件
@@ -128,11 +128,11 @@ export default function DocumentList({
             width: 120,
             render: (_, record) => (
                 <Space size="small">
-                    <Tooltip title="查看分段">
+                    <Tooltip title="分段设置">
                         <Button
                             type="text"
                             size="small"
-                            icon={<EyeOutlined />}
+                            icon={<UnorderedListOutlined />}
                             onClick={() => onViewDocument?.(record)}
                         />
                     </Tooltip>
diff --git a/app/components/dify-dataset-manager/document-upload.tsx b/app/components/dify-dataset-manager/document-upload.tsx
index a461be0..b7467c3 100644
--- a/app/components/dify-dataset-manager/document-upload.tsx
+++ b/app/components/dify-dataset-manager/document-upload.tsx
@@ -237,7 +237,7 @@ export default function DocumentUpload({
                             <div className="setting-item">
                                 <label className="setting-label">
                                     分段重叠长度
-                                    <Tooltip title="相邻分段之间重叠的字符数，有助于保持上下文连贯性">
+                                    <Tooltip title="设置分段之间的重叠长度可以保留分段之间的语义关系，提升召回效果建议设置为最大分段长度的10%-25%">
                                         <QuestionCircleOutlined className="help-icon" />
                                     </Tooltip>
                                 </label>
diff --git a/app/hooks/dify-dataset-manager/document-detail.ts b/app/hooks/dify-dataset-manager/document-detail.ts
index 36fb602..c349ce7 100644
--- a/app/hooks/dify-dataset-manager/document-detail.ts
+++ b/app/hooks/dify-dataset-manager/document-detail.ts
@@ -1,8 +1,13 @@
 import { message } from 'antd';
-import { useCallback, useEffect, useState } from 'react';
-import { updateDocumentWithSettings } from '~/api/dify-dataset/api/documentApi';
+import { useCallback, useEffect, useRef, useState } from 'react';
+import {
+    fetchUploadFileInfo,
+    downloadOriginalFile,
+    updateDocumentByFile,
+    fetchIndexingStatus,
+} from '~/api/dify-dataset/api/documentApi';
 import { fetchSegments } from '~/api/dify-dataset/api/segmentApi';
-import type { Segment } from '~/api/dify-dataset/type';
+import type { Segment, IndexingStatus } from '~/api/dify-dataset/type';
 import type { Document } from '~/api/dify-dataset/type/documentTypes';
 import type { DocumentDetailSegmentationSettings } from '~/types/dify-dataset-manager/document-detail';
 import { DEFAULT_DOCUMENT_DETAIL_SETTINGS } from '~/types/dify-dataset-manager/document-detail';
@@ -22,6 +27,73 @@ export function useDocumentDetail(datasetId: string, document: Document | null)
     // 保存状态
     const [saving, setSaving] = useState(false);
 
+    // 处理状态（嵌入进度）
+    const [isProcessing, setIsProcessing] = useState(false);
+    const [indexingStatus, setIndexingStatus] = useState<IndexingStatus | null>(null);
+    const pollingTimerRef = useRef<ReturnType<typeof setInterval> | null>(null);
+
+    /**
+     * 停止轮询
+     */
+    const stopPolling = useCallback(() => {
+        if (pollingTimerRef.current) {
+            clearInterval(pollingTimerRef.current);
+            pollingTimerRef.current = null;
+        }
+    }, []);
+
+    /**
+     * 轮询索引状态
+     */
+    const pollIndexingStatus = useCallback(async (batch: string) => {
+        try {
+            const response = await fetchIndexingStatus(datasetId, batch);
+            const status = response.data?.[0];
+
+            if (status) {
+                setIndexingStatus(status.indexing_status);
+
+                if (status.indexing_status === 'completed') {
+                    // 停止轮询
+                    stopPolling();
+                    setIsProcessing(false);
+                    message.success('文档处理完成');
+
+                    // 刷新分段预览
+                    setPreviewLoading(true);
+                    try {
+                        const segmentResponse = await fetchSegments(datasetId, document?.id || '', 1, 50);
+                        setPreviewSegments(segmentResponse.data || []);
+                        setShowPreview(true);
+                    } catch (err) {
+                        console.error('刷新分段失败:', err);
+                    } finally {
+                        setPreviewLoading(false);
+                    }
+                } else if (status.indexing_status === 'error') {
+                    // 停止轮询
+                    stopPolling();
+                    setIsProcessing(false);
+                    message.error(status.error || '处理失败');
+                }
+            }
+        } catch (err) {
+            console.error('获取索引状态失败:', err);
+        }
+    }, [datasetId, document?.id, stopPolling]);
+
+    /**
+     * 开始轮询
+     */
+    const startPolling = useCallback((batch: string) => {
+        stopPolling();
+        pollingTimerRef.current = setInterval(() => {
+            pollIndexingStatus(batch);
+        }, 2000);
+        // 立即执行一次
+        pollIndexingStatus(batch);
+    }, [stopPolling, pollIndexingStatus]);
+
     // 当文档变化时重置设置
     useEffect(() => {
         if (document) {
@@ -29,8 +101,18 @@ export function useDocumentDetail(datasetId: string, document: Document | null)
             setSettings(DEFAULT_DOCUMENT_DETAIL_SETTINGS);
             setPreviewSegments([]);
             setShowPreview(false);
+            setIsProcessing(false);
+            setIndexingStatus(null);
+            stopPolling();
         }
-    }, [document?.id]);
+    }, [document?.id, stopPolling]);
+
+    // 组件卸载时清理定时器
+    useEffect(() => {
+        return () => {
+            stopPolling();
+        };
+    }, [stopPolling]);
 
     /**
      * 更新设置
@@ -73,14 +155,27 @@ export function useDocumentDetail(datasetId: string, document: Document | null)
 
     /**
      * 保存并处理
+     * 流程：获取原始文件 → 下载 → 用新参数重新上传 → 轮询嵌入状态
      */
     const handleSaveAndProcess = useCallback(async () => {
         if (!document) return;
 
+        setIsProcessing(true);
         setSaving(true);
+        setIndexingStatus('waiting');
         try {
-            await updateDocumentWithSettings(datasetId, document.id, {
-                indexing_technique: 'high_quality',
+            // 1. 获取原始文件信息
+            message.loading({ content: '正在获取原始文件信息...', key: 'save-process' });
+            const uploadFileInfo = await fetchUploadFileInfo(datasetId, document.id);
+
+            // 2. 下载原始文件（通过代理路由）
+            message.loading({ content: '正在下载原始文件...', key: 'save-process' });
+            const file = await downloadOriginalFile(uploadFileInfo);
+
+            // 3. 用新参数重新上传
+            message.loading({ content: '正在应用新配置并重新处理...', key: 'save-process' });
+            const result = await updateDocumentByFile(datasetId, document.id, file, {
+                indexing_technique: settings.indexingTechnique,
                 process_rule: {
                     mode: 'custom',
                     rules: {
@@ -91,18 +186,25 @@ export function useDocumentDetail(datasetId: string, document: Document | null)
                         segmentation: {
                             separator: settings.separator.replace(/\\n/g, '\n'),
                             max_tokens: settings.maxTokens,
+                            chunk_overlap: settings.chunkOverlap,
                         },
                     },
                 },
             });
-            message.success('设置已保存，文档正在重新处理...');
+
+            message.success({ content: '文档正在处理中...', key: 'save-process' });
+
+            // 4. 开始轮询嵌入状态
+            startPolling(result.batch);
         } catch (err: any) {
             console.error('保存设置失败:', err);
-            message.error(err.message || '保存失败');
+            message.error({ content: err.message || '保存失败', key: 'save-process' });
+            setIsProcessing(false);
+            setIndexingStatus(null);
         } finally {
             setSaving(false);
         }
-    }, [datasetId, document, settings]);
+    }, [datasetId, document, settings, startPolling]);
 
     return {
         // 状态
@@ -111,6 +213,8 @@ export function useDocumentDetail(datasetId: string, document: Document | null)
         previewLoading,
         showPreview,
         saving,
+        isProcessing,
+        indexingStatus,
 
         // 方法
         updateSettings,
diff --git a/app/routes/api.dataset.dify-files.$.tsx b/app/routes/api.dataset.dify-files.$.tsx
new file mode 100644
index 0000000..8a95f27
--- /dev/null
+++ b/app/routes/api.dataset.dify-files.$.tsx
@@ -0,0 +1,80 @@
+import { type LoaderFunctionArgs } from '@remix-run/node';
+import { API_BASE_URL } from '~/config/api-config';
+
+/**
+ * GET /api/dataset/dify-files/*
+ * 代理 Dify 文件下载请求
+ *
+ * 用于下载 Dify 知识库中的原始文件
+ * 将 /api/dataset/dify-files/xxx 转发到 Dify 的 /files/xxx
+ */
+export async function loader({ request, params }: LoaderFunctionArgs) {
+    try {
+        const { getUserSession } = await import("~/api/login/auth.server");
+        const { frontendJWT } = await getUserSession(request);
+
+        if (!frontendJWT) {
+            return new Response(
+                JSON.stringify({ error: 'JWT认证失败，请重新登录' }),
+                { status: 401, headers: { 'Content-Type': 'application/json' } }
+            );
+        }
+
+        // 获取完整路径（包含查询参数）
+        const url = new URL(request.url);
+        const filePath = params['*'] || '';
+        const queryString = url.search;
+
+        console.log('[API] Dify File Proxy:', { filePath, queryString });
+
+        // 构建 Dify 文件下载 URL
+        // 使用专门的文件下载代理路由 /dify_file/
+        // 因为 Dify 文件 API (/files/) 不需要 /v1 前缀，与其他 API 不同
+        const difyFileUrl = `${API_BASE_URL}/dify_file/${filePath}${queryString}`;
+
+        console.log('[API] Proxying to:', difyFileUrl);
+
+        // 转发请求到 Dify
+        const response = await fetch(difyFileUrl, {
+            method: 'GET',
+            headers: {
+                'Authorization': `Bearer ${frontendJWT}`,
+            },
+        });
+
+        if (!response.ok) {
+            console.error('[API] Dify File Proxy - Error:', response.status, response.statusText);
+            return new Response(
+                JSON.stringify({ error: `文件下载失败: ${response.statusText}` }),
+                { status: response.status, headers: { 'Content-Type': 'application/json' } }
+            );
+        }
+
+        // 获取文件内容
+        const fileBuffer = await response.arrayBuffer();
+
+        // 返回文件，保持原始的 Content-Type
+        const contentType = response.headers.get('Content-Type') || 'application/octet-stream';
+        const contentDisposition = response.headers.get('Content-Disposition');
+
+        const headers: Record<string, string> = {
+            'Content-Type': contentType,
+        };
+
+        if (contentDisposition) {
+            headers['Content-Disposition'] = contentDisposition;
+        }
+
+        return new Response(fileBuffer, {
+            status: 200,
+            headers,
+        });
+
+    } catch (error: any) {
+        console.error('[API] Dify File Proxy - Error:', error.message);
+        return new Response(
+            JSON.stringify({ error: error.message || 'Failed to download file' }),
+            { status: 500, headers: { 'Content-Type': 'application/json' } }
+        );
+    }
+}
diff --git a/app/styles/components/dify-dataset-manager/index.css b/app/styles/components/dify-dataset-manager/index.css
index 4c98bb3..85b36b6 100644
--- a/app/styles/components/dify-dataset-manager/index.css
+++ b/app/styles/components/dify-dataset-manager/index.css
@@ -1977,6 +1977,17 @@
     margin-bottom: 24px;
 }
 
+.processing-status .processing-title {
+    display: flex;
+    align-items: center;
+    justify-content: center;
+    gap: 10px;
+    font-size: 14px;
+    font-weight: 500;
+    color: #1a1a1a;
+    margin-bottom: 16px;
+}
+
 .processing-file {
     display: flex;
     align-items: center;
diff --git a/app/types/dify-dataset-manager/document-detail.ts b/app/types/dify-dataset-manager/document-detail.ts
index 9147025..e894c96 100644
--- a/app/types/dify-dataset-manager/document-detail.ts
+++ b/app/types/dify-dataset-manager/document-detail.ts
@@ -1,4 +1,4 @@
-import type { Segment } from '~/api/dify-dataset/type';
+import type { Segment, IndexingStatus } from '~/api/dify-dataset/type';
 import type { Document } from '~/api/dify-dataset/type/documentTypes';
 
 /**
@@ -11,20 +11,22 @@ export interface DocumentDetailProps {
 
 /**
  * 分段设置配置（文档详情专用）
- * 注意：Dify API 支持的参数有限
+ * 注意：update-by-file API 支持的参数
  * - separator: ✅ 支持
  * - maxTokens: ✅ 支持
+ * - chunkOverlap: ✅ 支持（分段重叠长度）
  * - removeExtraSpaces: ✅ 支持
  * - removeUrlsEmails: ✅ 支持
- * - useQASegment: ⚠️ 需要 doc_form: "qa_model"
+ * - indexingTechnique: ✅ 支持（high_quality/economy）
+ * - doc_form/doc_language: ❌ 不支持（仅 create-by-file 支持）
  */
 export interface DocumentDetailSegmentationSettings {
     separator: string;
     maxTokens: number;
+    chunkOverlap: number;
     removeExtraSpaces: boolean;
     removeUrlsEmails: boolean;
-    useQASegment: boolean;
-    qaLanguage: string;
+    indexingTechnique: 'high_quality' | 'economy';
 }
 
 /**
@@ -33,10 +35,10 @@ export interface DocumentDetailSegmentationSettings {
 export const DEFAULT_DOCUMENT_DETAIL_SETTINGS: DocumentDetailSegmentationSettings = {
     separator: '\\n\\n',
     maxTokens: 500,
+    chunkOverlap: 50,
     removeExtraSpaces: true,
     removeUrlsEmails: false,
-    useQASegment: false,
-    qaLanguage: 'Chinese',
+    indexingTechnique: 'high_quality',
 };
 
 /**
@@ -48,4 +50,20 @@ export interface DocumentDetailState {
     previewLoading: boolean;
     showPreview: boolean;
     saving: boolean;
+    isProcessing: boolean;
+    indexingStatus: IndexingStatus | null;
 }
+
+/**
+ * 索引状态配置
+ */
+export const INDEXING_STATUS_CONFIG: Record<IndexingStatus, { text: string; percent: number }> = {
+    waiting: { text: '等待处理...', percent: 10 },
+    parsing: { text: '解析文档...', percent: 30 },
+    cleaning: { text: '清洗文本...', percent: 50 },
+    splitting: { text: '分段处理...', percent: 70 },
+    indexing: { text: '建立索引...', percent: 85 },
+    completed: { text: '处理完成', percent: 100 },
+    paused: { text: '已暂停', percent: 0 },
+    error: { text: '处理失败', percent: 0 },
+};