diff --git a/README.md b/README.md
index 3adad46..9463085 100644
--- a/README.md
+++ b/README.md
@@ -5,7 +5,7 @@ Tauri 2 + React + TypeScript + Milkdown（ProseMirror）。
 
 ## 当前进度
 
-**阶段 0–5 已完成（自动化验证全绿），待 Windows 真机验收清单确认。**
+**阶段 0–6 已完成（自动化验证全绿），待 Windows 真机验收清单确认。**
 阶段 5：7 套文档主题、自定义 CSS、导出 HTML、打印/PDF、导入 HTML/Word，报告见 `docs/09-stage5-report.md`。
 阶段 1：Tauri 桌面骨架 + 打开/编辑/保存全链路，报告见 `docs/05-stage1-report.md` §4 清单。
 
diff --git a/docs/10-stage6-report.md b/docs/10-stage6-report.md
new file mode 100644
index 0000000..e4896c0
--- /dev/null
+++ b/docs/10-stage6-report.md
@@ -0,0 +1,64 @@
+# 阶段 6 报告：体验与性能
+
+完成日期：2026-11-13。本阶段交付专注/打字机模式、文档内查找替换、工作区全文搜索、快捷键自定义中心、多窗口与大文档性能实测。
+
+## 1. 实现内容
+
+### 专注模式与打字机模式（视图菜单开关，随偏好持久化）
+
+- **专注模式**：自研 ProseMirror 装饰插件（`createFocusDimPlugin`）——选区/文档变化时给「非当前顶层块」加节点装饰类 `focus-dim`（CSS 透明度 0.32 + 0.25s 过渡）；选区所在顶层块保持全亮。装饰是纯呈现层，不入模型、不入撤销历史。开关切换时经插件 meta 立即重算，编辑器创建完成后也会按当前开关状态应用一次。
+- **打字机模式**：EditorPane 的光标回调里用 `coordsAtPos` 计算光标行位置，当其偏离编辑区垂直中央超过 6px 时平滑滚动使光标行回到中央；仅滚动容器操作，不改文档。
+
+### 文档内查找替换（编辑菜单/Ctrl+F、Ctrl+H）
+
+- 引擎：`src/editor/search.ts` 把文档拍平成「字符 → 文档位置」索引（块间放分隔符），在此之上做明文/正则匹配——命中可跨文本节点（如粗体边界）精确映射回文档位置，**跨块命中自动跳过**（避免替换合并段落）。选项：区分大小写、全词匹配（ASCII 词边界）、正则（非法正则给出中文错误提示），命中上限 5000。
+- 渲染模式走 ProseMirror 事务（选中命中并滚动到可见处；替换为单事务 `insertText`，可撤销；全部替换倒序单事务完成）；源码模式在 CodeMirror 文档文本上复用同一套语义实现偏移版查找/替换。
+- UI：右上角浮动 FindBar（查找/替换两行可折叠、命中计数 `当前 / 总数`、Enter 下一个/Shift+Enter 上一个、Esc 关闭）；打开时自动带入编辑器选区文本作为查询词；切换标签/模式时对新上下文自动重算；同一文档的编辑会经替换后自动刷新命中。
+
+### 工作区全文搜索（侧边栏第三页签「搜索」）
+
+- Rust 纯逻辑模块 `search.rs`：递归扫描工作区内的 `.md/.markdown/.txt`（跳过隐藏目录与 node_modules，单文件上限 2MB），逐行包含匹配，返回行号 + 片段（≤160 字）。保护上限：有命中的文件 ≤300、单文件命中 ≤20。命令 `workspace_search` 转发；逻辑已用独立 crate 对临时目录树实跑断言（大小写敏感/不敏感、跳过隐藏目录与图片、空查询）。
+- 前端页签含查询框、区分大小写开关、结果按文件分组（文件名 + 行号 + 片段）；点击任一命中在主窗口打开文件并自动打开查找条定位该查询词。Web 降级模式与未打开文件夹时给出明确提示。
+
+### 快捷键自定义中心（帮助 → 快捷键设置…）
+
+- 应用级快捷键从 App 的硬编码分支重构为注册表（`src/utils/shortcuts.ts`）：22 个动作（新建/打开/保存/另存为/关闭标签/查找/替换/侧边栏/链接/图片/表格/引用/代码块/段落/六级标题/打印/缩放），全局键盘处理先归一化组合键再查生效绑定分发，原有语义保持不变（IME 守卫、输入框内不触发内容类快捷键、保存走保存/另存为两条独立绑定）。
+- 设置中心支持改绑（点击「修改」后按任意组合键录入，Esc 取消）、解绑、恢复单个默认；改绑命中他人组合键时弹出冲突提示，可选择「覆盖并解绑对方」；编辑器内置键（Ctrl+B/I、Tab 导航等）单列只读展示并注明不可改绑。覆盖随 UI 偏好持久化（SQLite/localStorage），即时生效。菜单上的快捷键标注仍为默认组合，改绑后以设置中心为准。
+
+### 多窗口打开文档
+
+- 文件菜单「在新窗口打开当前文档」：Tauri `WebviewWindow` 以 `doc-*` 标签创建新窗口，URL 带 `?file=<路径>` 参数；应用启动初始化时读取该参数自动打开对应文档。新窗口与主窗口共用 SQLite（最近文件/偏好/恢复记录一致），同文档双开编辑时由阶段 4 的外部修改基线检测兜底冲突提醒。
+- 能力配置：`default.json` 的 windows 扩展为 `["main", "doc-*"]`，新增 `core:webview:allow-create-webview-window` 权限；新窗口同样使用无边框装饰设置。
+
+## 2. 性能实测（沙箱口径）
+
+`tests/perf.test.ts`（`PERF_BENCH=1` 时运行，默认跳过）用结构化文档（标题/段落/列表/表格/代码块混合）实测「建模 + 序列化」：
+
+| 目标大小 | 实际字符 | 建模（create） | 全量序列化 |
+| --- | --- | --- | --- |
+| 100 KB | 61,342 | 2.2 s | 0.46 s |
+| 1 MB | 625,870 | 29.8 s | 2.6 s |
+
+口径说明（重要）：这是 **jsdom + 沙箱共享 CPU（1.5 核）** 的数字——jsdom 的 DOM 操作比真实浏览器慢一个量级，属悲观上限，不是 WebView2 真机表现；可得的结论是成本随体积近似线性、序列化远快于建模。输入延迟在 jsdom 里无法测（无真实渲染管线），**大文档真机手感列入 Windows 验收清单**：重点验 100KB 文档输入跟手度与 1MB 文档打开等待；若真机 1MB 建模仍明显卡顿，阶段 7 前可再做「打开时占位 + 分片解析」优化，本阶段未预先做该改造（避免无真机数据拍脑袋）。
+
+## 3. 验证
+
+- 前端：`npx tsc -b` 0 错误；vitest **61 通过 + 2 跳过**（跳过为性能基准门控），新增阶段 6 共 8 例：
+  - 查找索引：跨文本节点命中映射、跨块命中跳过、大小写/整词/正则与非法正则报错；真实编辑器里查到 2 处、选中文本核对、替换后序列化文本正确；
+  - 快捷键注册表：默认绑定无冲突、覆盖/解绑/覆盖优先、冲突占用查询、事件归一化与展示格式；
+  - 专注模式：真实编辑器开启后非当前块 2 个段落带 `focus-dim`、关闭后消失；
+  - 其余 53 例（阶段 1–5）无回归。
+- Rust：`search.rs` 独立 crate 断言全过（上文）；`commands.rs` 通过 rustfmt 语法解析；workspace_search 命令与 lib 注册完成。Tauri 完整构建仍受沙箱系统库限制，Rust 命令签名类型待 Windows 构建确认。
+- 生产构建通过；dev 冒烟 HTTP 200。
+
+## 4. 已知边界（如实登记）
+
+- 查找不做「全部命中高亮」，只有当前命中以选区形式高亮；源码模式替换走 CodeMirror changes（单次 dispatch，可撤销）。
+- 全词匹配只对 ASCII 词边界有效（中文无词边界概念，与主流编辑器行为一致）。
+- 全文搜索为同步命令：超大工作区（数千文件）可能有短暂等待，已有上限保护；结果点击定位到「该文件的第一个命中」而非具体行（打开后查找条定位首个命中，随后可逐个跳转）。
+- 多窗口共用恢复记录：两个窗口同时退出时未保存草稿的恢复条目可能重复提示，以先处理为准（记录处理后即删除）。
+- 菜单快捷键标注为默认组合键，改绑后不动态更新菜单文案（设置中心显示生效值）。
+
+## 5. 下一阶段（阶段 7：测试与发布准备）
+
+Win10/11 真机测试与验收清单总销账（阶段 0–6 累积清单）、安装包（nsis/msi）与便携版构建验证、自动更新通道设计与接入、版本号与发布说明、最终全量回归。
diff --git a/src/App.tsx b/src/App.tsx
index 16fa857..2ee891a 100644
--- a/src/App.tsx
+++ b/src/App.tsx
@@ -1,5 +1,6 @@
 import { Suspense, lazy, useCallback, useEffect, useMemo, useReducer, useRef, useState } from 'react'
 import type { Editor } from '@milkdown/kit/core'
+import { editorViewCtx } from '@milkdown/kit/core'
 import TitleBar from './components/TitleBar'
 import MenuBar, { type MenuDef } from './components/MenuBar'
 import TabBar from './components/TabBar'
@@ -7,6 +8,10 @@ import Sidebar from './components/Sidebar'
 import StatusBar from './components/StatusBar'
 import EditorPane from './components/EditorPane'
 import type { SourceEditorApi } from './components/SourceEditor'
+import FindBar from './components/FindBar'
+import type { EditorPaneApi } from './components/EditorPane'
+import type { FindOptions } from './editor/search'
+import { comboFromEvent, resolveShortcuts } from './utils/shortcuts'
 // 源码编辑器（CodeMirror）懒加载：不进首屏主包，仅切到源码模式时加载
 const SourceEditor = lazy(() => import('./components/SourceEditor'))
 import { offsetInMarkdown, type CursorAnchor } from './editor/cursorSync'
@@ -51,9 +56,9 @@ const UI_KEY = 'new-markdown:ui'
 function loadRecent(): string[] {
   try { return JSON.parse(localStorage.getItem(RECENT_KEY) ?? '[]') as string[] } catch { return [] }
 }
-interface UiState { theme: 'light' | 'dark'; sidebar: boolean; sidebarWidth: number; autosave: boolean; autosaveSeconds: number; docTheme: string; customCss: string }
+interface UiState { theme: 'light' | 'dark'; sidebar: boolean; sidebarWidth: number; autosave: boolean; autosaveSeconds: number; docTheme: string; customCss: string; focusMode: boolean; typewriter: boolean; shortcuts: Record<string, string> }
 function loadUi(): UiState {
-  const defaults: UiState = { theme: 'light', sidebar: true, sidebarWidth: 250, autosave: true, autosaveSeconds: 30, docTheme: 'default', customCss: '' }
+  const defaults: UiState = { theme: 'light', sidebar: true, sidebarWidth: 250, autosave: true, autosaveSeconds: 30, docTheme: 'default', customCss: '', focusMode: false, typewriter: false, shortcuts: {} }
   try {
     return { ...defaults, ...JSON.parse(localStorage.getItem(UI_KEY) ?? '{}') }
   } catch { return defaults }
@@ -71,7 +76,7 @@ export default function App() {
   const tab = activeTab(state)
 
   const [workspaceRoot, setWorkspaceRoot] = useState<string | null>(null)
-  const [sidebarMode, setSidebarMode] = useState<'files' | 'outline'>('outline')
+  const [sidebarMode, setSidebarMode] = useState<'files' | 'outline' | 'search'>('outline')
   const [recent, setRecent] = useState<string[]>(loadRecent)
   const [cursor, setCursor] = useState<CursorInfo>({ line: 1, col: 1 })
   const [sourceMode, setSourceMode] = useState(false)
@@ -108,8 +113,52 @@ export default function App() {
   const jumpRef = useRef<(text: string) => void>(() => undefined)
   const anchorApiRef = useRef<{ getAnchor: () => CursorAnchor | null; setCursorByAnchor: (a: CursorAnchor) => void } | null>(null)
   const sourceApiRef = useRef<SourceEditorApi | null>(null)
+  const sourceModeRef = useRef(sourceMode)
+  sourceModeRef.current = sourceMode
   const pendingAnchorRef = useRef<CursorAnchor | null>(null)
   const [sourceCursorOffset, setSourceCursorOffset] = useState(0)
+  const paneFindRef = useRef<EditorPaneApi | null>(null)
+  const [findUi, setFindUi] = useState<{ open: boolean; replace: boolean; query: string; replacement: string; opts: FindOptions; count: number; current: number; error: string | null }>({
+    open: false, replace: false, query: '', replacement: '',
+    opts: { caseSensitive: false, wholeWord: false, regex: false }, count: 0, current: -1, error: null,
+  })
+  const findUiRef = useRef(findUi)
+  findUiRef.current = findUi
+  const pendingFindRef = useRef<string | null>(null)
+
+  const activeFindApi = useCallback((): Pick<EditorPaneApi, 'findAll' | 'gotoMatch' | 'replaceCurrent' | 'replaceAll' | 'clearFind'> | SourceEditorApi | null => {
+    return sourceModeRef.current ? sourceApiRef.current : paneFindRef.current
+  }, [])
+
+  const runFind = useCallback((query: string, opts: FindOptions, goFirst = true) => {
+    const api = activeFindApi()
+    if (!api || !query) {
+      setFindUi((f) => ({ ...f, count: 0, current: -1, error: null }))
+      return
+    }
+    try {
+      const count = api.findAll(query, opts)
+      const current = count > 0 && goFirst ? api.gotoMatch(0) : -1
+      setFindUi((f) => ({ ...f, count, current, error: null }))
+    } catch (e) {
+      setFindUi((f) => ({ ...f, count: 0, current: -1, error: e instanceof Error ? e.message : String(e) }))
+    }
+  }, [activeFindApi])
+
+  const openFind = useCallback((replace: boolean, preset?: string) => {
+    const selection = !sourceModeRef.current && editorRef.current
+      ? (() => { try { const st = editorRef.current?.action((ctx) => { const v = ctx.get(editorViewCtx); return v.state.doc.textBetween(v.state.selection.from, v.state.selection.to) }); return typeof st === 'string' ? st : '' } catch { return '' } })()
+      : ''
+    const query = preset ?? (selection && !selection.includes('\n') ? selection : findUiRef.current.query)
+    setFindUi((f) => ({ ...f, open: true, replace, query }))
+    window.setTimeout(() => runFind(query, findUiRef.current.opts), 30)
+  }, [runFind])
+
+  const closeFind = useCallback(() => {
+    activeFindApi()?.clearFind()
+    setFindUi((f) => ({ ...f, open: false, count: 0, current: -1, error: null }))
+  }, [activeFindApi])
+
   const tauriMode = isTauri()
 
   useEffect(() => {
@@ -117,6 +166,27 @@ export default function App() {
     store.saveUiPref(JSON.stringify(ui))
   }, [ui])
 
+  // 工作区搜索点击结果：文件打开后自动打开查找条并定位
+  useEffect(() => {
+    if (!tab || !pendingFindRef.current) return
+    const query = pendingFindRef.current
+    pendingFindRef.current = null
+    const timer = window.setTimeout(() => openFind(false, query), 350)
+    return () => window.clearTimeout(timer)
+  }, [tab?.id, openFind])
+
+  // 查找条开着时切换标签/模式：对新上下文重算命中
+  const findContextKey = `${tab?.id ?? ''}:${sourceMode ? 'src' : 'doc'}`
+  const lastFindContextRef = useRef(findContextKey)
+  useEffect(() => {
+    if (lastFindContextRef.current === findContextKey) return
+    lastFindContextRef.current = findContextKey
+    if (findUiRef.current.open && findUiRef.current.query) {
+      const timer = window.setTimeout(() => runFind(findUiRef.current.query, findUiRef.current.opts), 60)
+      return () => window.clearTimeout(timer)
+    }
+  }, [findContextKey, runFind])
+
   const effectiveDocTheme = (tab ? docOverrides[tab.id] : undefined) ?? ui.docTheme
   useEffect(() => {
     document.documentElement.dataset.docTheme = effectiveDocTheme
@@ -170,6 +240,28 @@ export default function App() {
     }
   }, [tauriMode, openPath])
 
+  const openSearchResult = useCallback((path: string, query: string) => {
+    pendingFindRef.current = query
+    void openPath(path)
+  }, [openPath ])
+
+  const openInNewWindow = useCallback(async (path: string) => {
+    if (!isTauri()) return
+    try {
+      const { WebviewWindow } = await import('@tauri-apps/api/webviewWindow')
+      const label = `doc-${Date.now()}`
+      new WebviewWindow(label, {
+        url: `index.html?file=${encodeURIComponent(path)}`,
+        title: baseName(path),
+        width: 1280,
+        height: 820,
+        minWidth: 920,
+        minHeight: 600,
+        decorations: false,
+      })
+    } catch (e) { setError(`打开新窗口失败：${String(e)}`) }
+  }, [])
+
   const openFolder = useCallback(async () => {
     const folder = await pickFolder()
     if (folder) {
@@ -281,6 +373,9 @@ export default function App() {
       const plan = planRecovery(records, (path) => disk.get(path) ?? null)
       for (const key of plan.purgeKeys) void store.deleteRecovery(key)
       if (!cancelled && plan.offer.length > 0) setRecoveryOffer(plan.offer)
+      // 多窗口：新窗口通过 ?file= 参数打开指定文档（阶段 6）
+      const startupFile = new URLSearchParams(window.location.search).get('file')
+      if (!cancelled && startupFile) void openPath(startupFile)
     })()
     return () => { cancelled = true }
     // eslint-disable-next-line react-hooks/exhaustive-deps
@@ -498,32 +593,43 @@ export default function App() {
   useEffect(() => {
     const onKey = (e: KeyboardEvent) => {
       if (isImeComposing(e)) return // IME 组合期间全局快捷键一律不触发（阶段 2 守卫）
-      const mod = e.ctrlKey || e.metaKey
-      if (!mod) return
-      const key = e.key.toLowerCase()
-      const inTextField = (e.target as HTMLElement)?.tagName === 'TEXTAREA' || (e.target as HTMLElement)?.tagName === 'INPUT'
-      if (key === 'n' && !inTextField) { e.preventDefault(); newDoc() }
-      else if (key === 'o' && !inTextField) { e.preventDefault(); void openFile() }
-      else if (key === 's' && tab) { e.preventDefault(); void saveTab(tab, e.shiftKey) }
-      else if (key === 'w' && tab) { e.preventDefault(); closeTab(tab.id) }
-      else if (key === 'l' && e.shiftKey) { e.preventDefault(); setUi((u) => ({ ...u, sidebar: !u.sidebar })) }
-      else if (key === 'k' && !e.shiftKey && !inTextField) { e.preventDefault(); setModal('link') }
-      else if (key === 'p' && !e.shiftKey) { e.preventDefault(); printRef.current() }
-      else if (key === 't' && !e.shiftKey && !inTextField) { e.preventDefault(); withEditor((ed) => editorCommands.insertTable(ed)) }
-      else if (key === 'i' && e.shiftKey) { e.preventDefault(); void insertImage() }
-      else if (key === 'q' && e.shiftKey) { e.preventDefault(); withEditor(editorCommands.blockquote) }
-      else if (key === 'k' && e.shiftKey) { e.preventDefault(); withEditor(editorCommands.codeBlock) }
-      else if ((key === '=' || key === '+')) { e.preventDefault(); setZoom((z) => Math.min(1.4, +(z + 0.1).toFixed(2))) }
-      else if (key === '-') { e.preventDefault(); setZoom((z) => Math.max(0.7, +(z - 0.1).toFixed(2))) }
-      else if (/^[0-6]$/.test(key) && !inTextField) {
-        e.preventDefault()
-        const level = Number(key)
-        withEditor((ed) => (level === 0 ? editorCommands.paragraph(ed) : editorCommands.heading(ed, level)))
+      if (e.key === 'Escape' && findUiRef.current.open) { e.preventDefault(); closeFind(); return }
+      if (!e.ctrlKey && !e.metaKey && !e.altKey) return
+      const combo = comboFromEvent(e)
+      if (!combo) return
+      const actionId = resolveShortcuts(ui.shortcuts).get(combo)
+      if (!actionId) return
+      const target = e.target as HTMLElement | null
+      const inTextField = target?.tagName === 'TEXTAREA' || target?.tagName === 'INPUT'
+      const run = (fn: () => void) => { e.preventDefault(); fn() }
+      switch (actionId) {
+        case 'new': if (!inTextField) run(newDoc); break
+        case 'open': if (!inTextField) run(() => void openFile()); break
+        case 'save': if (tab) run(() => void saveTab(tab, false)); break
+        case 'saveAs': if (tab) run(() => void saveTab(tab, true)); break
+        case 'closeTab': if (tab) run(() => closeTab(tab.id)); break
+        case 'sidebar': run(() => setUi((u) => ({ ...u, sidebar: !u.sidebar }))); break
+        case 'find': if (tab) run(() => openFind(false)); break
+        case 'replace': if (tab) run(() => openFind(true)); break
+        case 'link': if (!inTextField) run(() => setModal('link')); break
+        case 'print': run(() => printRef.current()); break
+        case 'table': if (!inTextField) run(() => withEditor((ed) => editorCommands.insertTable(ed))); break
+        case 'image': run(() => void insertImage()); break
+        case 'blockquote': run(() => withEditor(editorCommands.blockquote)); break
+        case 'codeBlock': run(() => withEditor(editorCommands.codeBlock)); break
+        case 'paragraph': if (!inTextField) run(() => withEditor(editorCommands.paragraph)); break
+        case 'zoomIn': run(() => setZoom((z) => Math.min(1.4, +(z + 0.1).toFixed(2)))); break
+        case 'zoomOut': run(() => setZoom((z) => Math.max(0.7, +(z - 0.1).toFixed(2)))); break
+        default:
+          if (/^heading[1-6]$/.test(actionId) && !inTextField) {
+            const level = Number(actionId.slice('heading'.length))
+            run(() => withEditor((ed) => editorCommands.heading(ed, level)))
+          }
       }
     }
     document.addEventListener('keydown', onKey)
     return () => document.removeEventListener('keydown', onKey)
-  }, [tab, newDoc, openFile, saveTab, closeTab, withEditor])
+  }, [tab, newDoc, openFile, saveTab, closeTab, withEditor, ui.shortcuts, openFind, closeFind])
 
   const pasteFromClipboard = useCallback(async () => {
     if (sourceMode) {
@@ -701,6 +807,7 @@ export default function App() {
         { label: '保存', shortcut: 'Ctrl+S', disabled: !tab, onClick: () => tab && void saveTab(tab, false) },
         { label: '另存为…', shortcut: 'Ctrl+Shift+S', disabled: !tab, onClick: () => tab && void saveTab(tab, true) },
         { label: '关闭标签页', shortcut: 'Ctrl+W', disabled: !tab, onClick: () => tab && closeTab(tab.id) },
+        { label: '在新窗口打开当前文档', disabled: !tab?.path || !tauriMode, onClick: () => tab?.path && void openInNewWindow(tab.path) },
         { divider: true },
         { label: '导入 HTML / Word…', onClick: () => void importFileFlow() },
         { label: '导出…', disabled: !tab, onClick: () => setExportOpen(true) },
@@ -717,6 +824,9 @@ export default function App() {
         { label: '复制', onClick: () => document.execCommand('copy') },
         { label: '粘贴', onClick: () => { void pasteFromClipboard() } },
         { label: '全选', onClick: () => document.execCommand('selectAll') },
+        { divider: true },
+        { label: '查找', shortcut: 'Ctrl+F', disabled: !tab, onClick: () => openFind(false) },
+        { label: '替换', shortcut: 'Ctrl+H', disabled: !tab, onClick: () => openFind(true) },
       ],
     },
     {
@@ -760,6 +870,8 @@ export default function App() {
         { label: '源代码模式', checked: sourceMode, disabled: !tab, onClick: toggleSourceMode },
         { label: '深色主题', checked: ui.theme === 'dark', onClick: () => setUi((u) => ({ ...u, theme: u.theme === 'dark' ? 'light' : 'dark' })) },
         { label: `自动保存（${ui.autosaveSeconds} 秒）`, checked: ui.autosave, onClick: () => setUi((u) => ({ ...u, autosave: !u.autosave })) },
+        { label: '专注模式', checked: ui.focusMode, disabled: sourceMode, onClick: () => setUi((u) => ({ ...u, focusMode: !u.focusMode })) },
+        { label: '打字机模式', checked: ui.typewriter, disabled: sourceMode, onClick: () => setUi((u) => ({ ...u, typewriter: !u.typewriter })) },
         { divider: true },
         { label: '放大', shortcut: 'Ctrl+=', onClick: () => setZoom((z) => Math.min(1.4, +(z + 0.1).toFixed(2))) },
         { label: '缩小', shortcut: 'Ctrl+-', onClick: () => setZoom((z) => Math.max(0.7, +(z - 0.1).toFixed(2))) },
@@ -780,11 +892,11 @@ export default function App() {
     {
       label: '帮助',
       items: [
-        { label: '快捷键说明', onClick: () => setModal('shortcuts') },
+        { label: '快捷键设置…', onClick: () => setModal('shortcuts') },
         { label: '关于 new-markdown', onClick: () => setModal('about') },
       ],
     },
-  ], [tab, recent, sourceMode, ui, sidebarMode, tauriMode, newDoc, openFile, openFolder, openPath, saveTab, closeTab, withEditor, toggleSourceMode, insertImage, insertAttachment, pasteFromClipboard, importFileFlow, printDoc])
+  ], [tab, recent, sourceMode, ui, sidebarMode, tauriMode, newDoc, openFile, openFolder, openPath, saveTab, closeTab, withEditor, toggleSourceMode, insertImage, insertAttachment, pasteFromClipboard, importFileFlow, printDoc, openFind, openInNewWindow])
 
   const pendingTitles = pendingClose
     ? state.tabs.filter((t) => pendingClose.ids.includes(t.id) && isDirty(t)).map((t) => t.title).join('、')
@@ -823,6 +935,7 @@ export default function App() {
               refreshSignal={treeRefresh}
               outline={outline}
               onJumpHeading={jumpHeading}
+              onOpenSearchResult={openSearchResult}
               tauriMode={tauriMode}
             />
           </div>
@@ -856,8 +969,11 @@ export default function App() {
               initialMarkdown={tab.content}
               onMarkdown={(id, md) => dispatch({ type: 'updateContent', id, content: md })}
               onCursor={setCursor}
+              focusMode={ui.focusMode}
+              typewriter={ui.typewriter}
               onImageFile={handleImageFile}
               onReady={(api) => {
+                paneFindRef.current = api.editor ? api : null
                 editorRef.current = api.editor
                 jumpRef.current = api.jumpToHeading
                 anchorApiRef.current = api.editor ? { getAnchor: api.getAnchor, setCursorByAnchor: api.setCursorByAnchor } : null
@@ -868,6 +984,38 @@ export default function App() {
               }}
             />
           )}
+          {findUi.open && tab && (
+            <FindBar
+              query={findUi.query}
+              replacement={findUi.replacement}
+              showReplace={findUi.replace}
+              opts={findUi.opts}
+              count={findUi.count}
+              current={findUi.current}
+              error={findUi.error}
+              onQueryChange={(value) => { setFindUi((f) => ({ ...f, query: value })); runFind(value, findUiRef.current.opts) }}
+              onReplacementChange={(value) => setFindUi((f) => ({ ...f, replacement: value }))}
+              onToggleReplace={() => setFindUi((f) => ({ ...f, replace: !f.replace }))}
+              onOptsChange={(opts) => { setFindUi((f) => ({ ...f, opts })); runFind(findUiRef.current.query, opts) }}
+              onNext={() => { const api = activeFindApi(); if (api) { const cur = api.gotoMatch(findUiRef.current.current + 1); setFindUi((f) => ({ ...f, current: cur })) } }}
+              onPrev={() => { const api = activeFindApi(); if (api) { const cur = api.gotoMatch(findUiRef.current.current - 1); setFindUi((f) => ({ ...f, current: cur })) } }}
+              onReplace={() => {
+                const api = activeFindApi()
+                if (!api || !api.replaceCurrent(findUiRef.current.replacement)) return
+                const count = api.findAll(findUiRef.current.query, findUiRef.current.opts)
+                const current = count > 0 ? api.gotoMatch(Math.min(findUiRef.current.current, count - 1)) : -1
+                setFindUi((f) => ({ ...f, count, current }))
+              }}
+              onReplaceAll={() => {
+                const api = activeFindApi()
+                if (!api) return
+                const replaced = api.replaceAll(findUiRef.current.replacement)
+                if (replaced > 0) flash(`已替换 ${replaced} 处`)
+                setFindUi((f) => ({ ...f, count: 0, current: -1 }))
+              }}
+              onClose={closeFind}
+            />
+          )}
         </section>
       </div>
       <StatusBar
@@ -1005,7 +1153,7 @@ export default function App() {
         />
       )}
       {modal === 'about' && <AboutModal onClose={() => setModal(null)} />}
-      {modal === 'shortcuts' && <ShortcutsModal onClose={() => setModal(null)} />}
+      {modal === 'shortcuts' && <ShortcutsModal overrides={ui.shortcuts} onChange={(shortcuts) => setUi((u) => ({ ...u, shortcuts }))} onClose={() => setModal(null)} />}
       {modal === 'link' && (
         <LinkModal
           onCancel={() => setModal(null)}
diff --git a/src/components/EditorPane.tsx b/src/components/EditorPane.tsx
index 08db6e2..76e4cc4 100644
--- a/src/components/EditorPane.tsx
+++ b/src/components/EditorPane.tsx
@@ -5,12 +5,19 @@ import { editorViewCtx } from '@milkdown/kit/core'
 import { TextSelection } from '@milkdown/kit/prose/state'
 import { createMarkdownEditor, getMarkdown, type CursorInfo } from '../editor/editor'
 import { findBlockIndex, type CursorAnchor } from '../editor/cursorSync'
+import { buildTextIndex, findInIndex, type FindOptions, type MatchRange } from '../editor/search'
+import { setFocusModeEnabled, refreshFocusDecorations } from '../editor/plugins'
 
 export interface EditorPaneApi {
   editor: Editor | null
   jumpToHeading: (text: string) => void
   getAnchor: () => CursorAnchor | null
   setCursorByAnchor: (anchor: CursorAnchor) => void
+  findAll: (query: string, opts: FindOptions) => number
+  gotoMatch: (index: number) => number
+  replaceCurrent: (replacement: string) => boolean
+  replaceAll: (replacement: string) => number
+  clearFind: () => void
 }
 
 interface Props {
@@ -20,6 +27,8 @@ interface Props {
   onCursor: (cursor: CursorInfo) => void
   onReady: (api: EditorPaneApi) => void
   onImageFile?: (file: File) => Promise<string>
+  focusMode: boolean
+  typewriter: boolean
 }
 
 const EMPTY_API: EditorPaneApi = {
@@ -27,11 +36,21 @@ const EMPTY_API: EditorPaneApi = {
   jumpToHeading: () => undefined,
   getAnchor: () => null,
   setCursorByAnchor: () => undefined,
+  findAll: () => 0,
+  gotoMatch: () => -1,
+  replaceCurrent: () => false,
+  replaceAll: () => 0,
+  clearFind: () => undefined,
 }
 
 /** 单标签编辑器宿主：挂载时以标签内容建模，卸载前回写最终序列化文本，保证切标签不丢内容。 */
-export default function EditorPane({ tabId, initialMarkdown, onMarkdown, onCursor, onReady, onImageFile }: Props) {
+export default function EditorPane({ tabId, initialMarkdown, onMarkdown, onCursor, onReady, onImageFile, focusMode, typewriter }: Props) {
   const wrapRef = useRef<HTMLDivElement>(null)
+  const findRef = useRef<{ matches: MatchRange[]; current: number; query: string; opts: FindOptions | null }>({
+    matches: [], current: -1, query: '', opts: null,
+  })
+  const modesRef = useRef({ focusMode, typewriter })
+  modesRef.current = { focusMode, typewriter }
   const editorObjRef = useRef<Editor | null>(null)
   const [tableBar, setTableBar] = useState<{ top: number; left: number } | null>(null)
 
@@ -51,9 +70,31 @@ export default function EditorPane({ tabId, initialMarkdown, onMarkdown, onCurso
 
   useEffect(() => {
     if (!hostRef.current) return
+    const centerCursorLine = () => {
+      // 打字机模式：把光标行滚到编辑区垂直中央附近
+      window.requestAnimationFrame(() => {
+        const container = wrapRef.current?.closest('.editor-scroll') as HTMLElement | null
+        if (!container) return
+        try {
+          editor.action((ctx) => {
+            const view = ctx.get(editorViewCtx)
+            const coords = view.coordsAtPos(view.state.selection.from)
+            const rect = container.getBoundingClientRect()
+            const lineCenter = (coords.top + coords.bottom) / 2 - rect.top + container.scrollTop
+            const target = lineCenter - container.clientHeight / 2
+            if (Math.abs(target - container.scrollTop) > 6) {
+              container.scrollTo({ top: target, behavior: 'smooth' })
+            }
+          })
+        } catch { /* 视图未就绪时跳过 */ }
+      })
+    }
     const editor = createMarkdownEditor(hostRef.current, initialRef.current, {
       onMarkdown: (md) => callbacksRef.current.onMarkdown(tabId, md),
-      onCursor: (c) => callbacksRef.current.onCursor(c),
+      onCursor: (c) => {
+        callbacksRef.current.onCursor(c)
+        if (modesRef.current.typewriter) centerCursorLine()
+      },
       onTableContext: (inTable, el) => { tableElRef.current = el; if (inTable) updateTableBar(); else setTableBar(null) },
     }, { onImageFile: (file) => callbacksRef.current.onImageFile ? callbacksRef.current.onImageFile(file) : Promise.resolve(URL.createObjectURL(file)) })
     editorObjRef.current = editor
@@ -94,8 +135,72 @@ export default function EditorPane({ tabId, initialMarkdown, onMarkdown, onCurso
         })
       } catch { /* 定位失败静默：不打断模式切换 */ }
     }
+    const findAll = (query: string, opts: FindOptions): number => {
+      try {
+        const matches = editor.action((ctx) => {
+          const view = ctx.get(editorViewCtx)
+          return findInIndex(buildTextIndex(view.state.doc), query, opts)
+        })
+        findRef.current = { matches, current: matches.length ? 0 : -1, query, opts }
+        return matches.length
+      } catch (e) {
+        throw e instanceof Error ? e : new Error(String(e))
+      }
+    }
+    const gotoMatch = (index: number): number => {
+      const found = findRef.current
+      if (found.matches.length === 0) return -1
+      const wrapped = ((index % found.matches.length) + found.matches.length) % found.matches.length
+      found.current = wrapped
+      const m = found.matches[wrapped]
+      editor.action((ctx) => {
+        const view = ctx.get(editorViewCtx)
+        view.dispatch(view.state.tr.setSelection(TextSelection.create(view.state.doc, m.from, m.to)).scrollIntoView())
+        view.focus()
+      })
+      return wrapped
+    }
+    const replaceCurrent = (replacement: string): boolean => {
+      const found = findRef.current
+      if (found.current < 0 || !found.opts) return false
+      const m = found.matches[found.current]
+      if (!m) return false
+      editor.action((ctx) => {
+        const view = ctx.get(editorViewCtx)
+        view.dispatch(view.state.tr.insertText(replacement, m.from, m.to))
+        view.focus()
+      })
+      const previous = found.current
+      const count = findAll(found.query, found.opts)
+      if (count > 0) gotoMatch(Math.min(previous, count - 1))
+      return true
+    }
+    const replaceAll = (replacement: string): number => {
+      const found = findRef.current
+      if (found.matches.length === 0) return 0
+      const total = found.matches.length
+      const reversed = [...found.matches].reverse()
+      editor.action((ctx) => {
+        const view = ctx.get(editorViewCtx)
+        const tr = view.state.tr
+        for (const m of reversed) tr.insertText(replacement, m.from, m.to)
+        view.dispatch(tr)
+        view.focus()
+      })
+      findRef.current = { matches: [], current: -1, query: found.query, opts: found.opts }
+      return total
+    }
+    const clearFind = () => {
+      findRef.current = { matches: [], current: -1, query: '', opts: null }
+    }
     editor.create()
-      .then(() => callbacksRef.current.onReady({ editor, jumpToHeading, getAnchor, setCursorByAnchor }))
+      .then(() => {
+        setFocusModeEnabled(modesRef.current.focusMode)
+        try {
+          editor.action((ctx) => refreshFocusDecorations(ctx.get(editorViewCtx) as never))
+        } catch { /* 忽略 */ }
+        callbacksRef.current.onReady({ editor, jumpToHeading, getAnchor, setCursorByAnchor, findAll, gotoMatch, replaceCurrent, replaceAll, clearFind })
+      })
       .catch((e) => console.error('编辑器创建失败', e))
     const scrollParent = wrapRef.current?.closest('.editor-scroll')
     const onScroll = () => { if (editorObjRef.current) updateTableBar() }
@@ -112,6 +217,16 @@ export default function EditorPane({ tabId, initialMarkdown, onMarkdown, onCurso
     }
   }, [tabId, updateTableBar])
 
+  // 专注模式切换时立即刷新当前编辑器装饰
+  useEffect(() => {
+    setFocusModeEnabled(focusMode)
+    const editor = editorObjRef.current
+    if (!editor) return
+    try {
+      editor.action((ctx) => refreshFocusDecorations(ctx.get(editorViewCtx) as never))
+    } catch { /* 编辑器未就绪时跳过，创建完成时会再应用 */ }
+  }, [focusMode])
+
   return (
     <div className="editor-pane-wrap" ref={wrapRef}>
       {tableBar && editorObjRef.current && (
diff --git a/src/components/FindBar.tsx b/src/components/FindBar.tsx
new file mode 100644
index 0000000..0e4af85
--- /dev/null
+++ b/src/components/FindBar.tsx
@@ -0,0 +1,84 @@
+import { useEffect, useRef } from 'react'
+import type { FindOptions } from '../editor/search'
+
+interface Props {
+  query: string
+  replacement: string
+  showReplace: boolean
+  opts: FindOptions
+  count: number
+  current: number // -1 表示无当前命中
+  error: string | null
+  onQueryChange: (value: string) => void
+  onReplacementChange: (value: string) => void
+  onToggleReplace: () => void
+  onOptsChange: (opts: FindOptions) => void
+  onNext: () => void
+  onPrev: () => void
+  onReplace: () => void
+  onReplaceAll: () => void
+  onClose: () => void
+}
+
+/** 查找/替换条（阶段 6）：渲染与源码双模式共用，命中/替换由外部 API 执行。 */
+export default function FindBar(p: Props) {
+  const queryRef = useRef<HTMLInputElement>(null)
+  useEffect(() => {
+    queryRef.current?.focus()
+    queryRef.current?.select()
+  }, [])
+
+  const toggle = (key: keyof FindOptions, label: string, title: string) => (
+    <button
+      className={`find-toggle ${p.opts[key] ? 'on' : ''}`}
+      title={title}
+      onClick={() => p.onOptsChange({ ...p.opts, [key]: !p.opts[key] })}
+    >
+      {label}
+    </button>
+  )
+
+  return (
+    <div className="findbar">
+      <div className="findbar-row">
+        <button className="find-icon" title={p.showReplace ? '收起替换' : '展开替换'} onClick={p.onToggleReplace}>
+          {p.showReplace ? '▾' : '▸'}
+        </button>
+        <input
+          ref={queryRef}
+          className="input find-input"
+          placeholder="查找"
+          value={p.query}
+          onChange={(e) => p.onQueryChange(e.target.value)}
+          onKeyDown={(e) => {
+            if (e.key === 'Enter') { e.preventDefault(); e.shiftKey ? p.onPrev() : p.onNext() }
+            if (e.key === 'Escape') { e.preventDefault(); p.onClose() }
+          }}
+        />
+        {toggle('caseSensitive', 'Aa', '区分大小写')}
+        {toggle('wholeWord', '整词', '全词匹配')}
+        {toggle('regex', '.*', '正则表达式')}
+        <span className="find-count">
+          {p.error ? p.error : p.query ? (p.count === 0 ? '无结果' : `${p.current + 1} / ${p.count}`) : ''}
+        </span>
+        <button className="find-icon" title="上一个 (Shift+Enter)" onClick={p.onPrev}>↑</button>
+        <button className="find-icon" title="下一个 (Enter)" onClick={p.onNext}>↓</button>
+        <button className="find-icon" title="关闭 (Esc)" onClick={p.onClose}>✕</button>
+      </div>
+      {p.showReplace && (
+        <div className="findbar-row">
+          <span className="find-spacer" />
+          <input
+            className="input find-input"
+            placeholder="替换为"
+            value={p.replacement}
+            onChange={(e) => p.onReplacementChange(e.target.value)}
+            onKeyDown={(e) => { if (e.key === 'Escape') { e.preventDefault(); p.onClose() } }}
+          />
+          <button className="find-action" onClick={p.onReplace}>替换</button>
+          <button className="find-action" onClick={p.onReplaceAll}>全部替换</button>
+        </div>
+      )}
+    </div>
+  )
+}
diff --git a/src/components/Modals.tsx b/src/components/Modals.tsx
index 41dd1b3..cd35711 100644
--- a/src/components/Modals.tsx
+++ b/src/components/Modals.tsx
@@ -1,4 +1,5 @@
-import { useState } from 'react'
+import { useEffect, useState } from 'react'
+import { SHORTCUT_DEFS, BUILTIN_SHORTCUTS, comboFromEvent, comboOwner, effectiveCombos, prettyCombo } from '../utils/shortcuts'
 
 function Shell({ children, onCancel }: { children: React.ReactNode; onCancel?: () => void }) {
   return (
@@ -38,27 +39,76 @@ export function AboutModal({ onClose }: { onClose: () => void }) {
   )
 }
 
-const SHORTCUTS: [string, string][] = [
-  ['新建文档', 'Ctrl+N'], ['打开文件', 'Ctrl+O'], ['保存', 'Ctrl+S'], ['另存为', 'Ctrl+Shift+S'],
-  ['关闭标签页', 'Ctrl+W'], ['撤销 / 重做', 'Ctrl+Z / Ctrl+Y'],
-  ['加粗 / 斜体', 'Ctrl+B / Ctrl+I'], ['插入链接', 'Ctrl+K'],
-  ['段落 / 一级标题', 'Ctrl+0 / Ctrl+1'], ['二级 ~ 六级标题', 'Ctrl+2 ~ Ctrl+6'],
-  ['引用', 'Ctrl+Shift+Q'], ['代码块', 'Ctrl+Shift+K'],
-  ['显示/隐藏侧边栏', 'Ctrl+Shift+L'], ['放大 / 缩小', 'Ctrl+= / Ctrl+-'],
-]
+/** 快捷键设置中心（阶段 6）：应用级快捷键可改绑/解绑/恢复默认，改绑时检测冲突。 */
+export function ShortcutsModal({ overrides, onChange, onClose }: {
+  overrides: Record<string, string>
+  onChange: (overrides: Record<string, string>) => void
+  onClose: () => void
+}) {
+  const [recordingId, setRecordingId] = useState<string | null>(null)
+  const [conflict, setConflict] = useState<{ id: string; combo: string; ownerLabel: string; ownerId: string } | null>(null)
+  const combos = effectiveCombos(overrides)
+
+  useEffect(() => {
+    if (!recordingId) return
+    const onKey = (e: KeyboardEvent) => {
+      e.preventDefault()
+      e.stopPropagation()
+      if (e.key === 'Escape') { setRecordingId(null); return }
+      const combo = comboFromEvent(e)
+      if (!combo) return
+      const owner = comboOwner(combo, overrides, recordingId)
+      setRecordingId(null)
+      if (owner) {
+        setConflict({ id: recordingId, combo, ownerLabel: owner.label, ownerId: owner.id })
+      } else {
+        onChange({ ...overrides, [recordingId]: combo })
+      }
+    }
+    window.addEventListener('keydown', onKey, true)
+    return () => window.removeEventListener('keydown', onKey, true)
+  }, [recordingId, overrides, onChange])
+
+  const applyConflict = () => {
+    if (!conflict) return
+    onChange({ ...overrides, [conflict.id]: conflict.combo, [conflict.ownerId]: '' })
+    setConflict(null)
+  }
 
-export function ShortcutsModal({ onClose }: { onClose: () => void }) {
   return (
     <Shell onCancel={onClose}>
-      <h3>快捷键</h3>
+      <h3>快捷键设置</h3>
+      <div className="shortcut-list">
+        {SHORTCUT_DEFS.map((def) => {
+          const combo = combos.get(def.id) ?? ''
+          const customized = overrides[def.id] !== undefined
+          return (
+            <div className="shortcut-row" key={def.id}>
+              <span className="shortcut-name">{def.label}</span>
+              <kbd>{recordingId === def.id ? '请按键…' : combo ? prettyCombo(combo) : '（未绑定）'}</kbd>
+              <button onClick={() => { setConflict(null); setRecordingId(def.id) }}>修改</button>
+              <button disabled={!combo} onClick={() => onChange({ ...overrides, [def.id]: '' })}>解绑</button>
+              <button disabled={!customized} onClick={() => { const next = { ...overrides }; delete next[def.id]; onChange(next) }}>默认</button>
+            </div>
+          )
+        })}
+      </div>
+      {conflict && (
+        <p className="modal-note conflict-note">
+          <b>{prettyCombo(conflict.combo)}</b> 已被「{conflict.ownerLabel}」占用。
+          <button onClick={applyConflict}>覆盖并解绑对方</button>
+          <button onClick={() => setConflict(null)}>取消</button>
+        </p>
+      )}
+      <h4 className="shortcut-subtitle">编辑器内置（不可改绑）</h4>
       <table className="shortcuts-table">
         <tbody>
-          {SHORTCUTS.map(([name, key]) => (
+          {BUILTIN_SHORTCUTS.map(([name, key]) => (
             <tr key={name}><td>{name}</td><td><kbd>{key}</kbd></td></tr>
           ))}
         </tbody>
       </table>
-      <p className="modal-note">需求表里 Ctrl+0 同时挂了「段落」与「恢复默认缩放」，本实现取「段落」（与 Typora 一致），恢复缩放走视图菜单，避免同键双义。阶段 6 设置中心提供快捷键自定义与冲突检测。</p>
+      <p className="modal-note">Ctrl+0 取「段落」（与 Typora 一致），恢复默认缩放走视图菜单。设置即时生效并随偏好保存。</p>
       <div className="modal-actions"><button className="primary" onClick={onClose}>关闭</button></div>
     </Shell>
   )
diff --git a/src/components/Sidebar.tsx b/src/components/Sidebar.tsx
index 7f91c37..226a365 100644
--- a/src/components/Sidebar.tsx
+++ b/src/components/Sidebar.tsx
@@ -1,11 +1,12 @@
 import { useCallback, useEffect, useState } from 'react'
-import { listDir, type DirEntry } from '../services/platform'
+import { listDir, workspaceSearch, type DirEntry, type WorkspaceSearchFile } from '../services/platform'
 import type { OutlineItem } from '../utils/text'
 import { baseName } from '../utils/text'
 
 interface Props {
-  mode: 'files' | 'outline'
-  onModeChange: (mode: 'files' | 'outline') => void
+  mode: 'files' | 'outline' | 'search'
+  onModeChange: (mode: 'files' | 'outline' | 'search') => void
+  onOpenSearchResult?: (path: string, query: string) => void
   workspaceRoot: string | null
   activePath: string | null
   onOpenFile: (path: string) => void
@@ -25,8 +26,12 @@ export default function Sidebar(p: Props) {
       <div className="sidebar-tabs">
         <button className={p.mode === 'files' ? 'active' : ''} onClick={() => p.onModeChange('files')}>文件</button>
         <button className={p.mode === 'outline' ? 'active' : ''} onClick={() => p.onModeChange('outline')}>大纲</button>
+        <button className={p.mode === 'search' ? 'active' : ''} onClick={() => p.onModeChange('search')}>搜索</button>
       </div>
-      {p.mode === 'outline' ? (
+      {p.mode === 'search' ? (
+        <WorkspaceSearch root={p.workspaceRoot} tauriMode={p.tauriMode} onOpen={p.onOpenSearchResult} />
+      ) : null}
+      {p.mode === 'search' ? null : p.mode === 'outline' ? (
         <div className="outline">
           {p.outline.length === 0 && <div className="sidebar-empty">当前文档暂无标题</div>}
           {p.outline.map((o, i) => (
@@ -162,3 +167,74 @@ function TreeLevel({ dir, depth, activePath, onOpenFile, refreshKey, onEntryMenu
     </div>
   )
 }
+
+function WorkspaceSearch({ root, tauriMode, onOpen }: {
+  root: string | null
+  tauriMode: boolean
+  onOpen?: (path: string, query: string) => void
+}) {
+  const [query, setQuery] = useState('')
+  const [caseSensitive, setCaseSensitive] = useState(false)
+  const [results, setResults] = useState<WorkspaceSearchFile[] | null>(null)
+  const [searching, setSearching] = useState(false)
+  const [error, setError] = useState<string | null>(null)
+
+  const run = async () => {
+    if (!root || !query.trim()) return
+    setSearching(true)
+    setError(null)
+    try {
+      setResults(await workspaceSearch(root, query.trim(), caseSensitive))
+    } catch (e) {
+      setError(String(e))
+    } finally {
+      setSearching(false)
+    }
+  }
+
+  if (!tauriMode) return <div className="sidebar-empty">Web 降级模式不支持工作区搜索。</div>
+  if (!root) return <div className="sidebar-empty">先打开一个文件夹，再搜索其中的文档。</div>
+  const total = results?.reduce((acc, f) => acc + f.matches.length, 0) ?? 0
+  return (
+    <div className="ws-search">
+      <div className="ws-search-box">
+        <input
+          className="input"
+          placeholder="搜索工作区文档…"
+          value={query}
+          onChange={(e) => setQuery(e.target.value)}
+          onKeyDown={(e) => { if (e.key === 'Enter') void run() }}
+        />
+        <button className="primary" disabled={searching || !query.trim()} onClick={() => void run()}>
+          {searching ? '搜索中…' : '搜索'}
+        </button>
+      </div>
+      <label className="ws-search-case">
+        <input type="checkbox" checked={caseSensitive} onChange={(e) => setCaseSensitive(e.target.checked)} />
+        区分大小写
+      </label>
+      {error && <div className="sidebar-empty">{error}</div>}
+      {results && (
+        <div className="ws-search-summary">{results.length === 0 ? '没有找到匹配。' : `${results.length} 个文件 · ${total} 处匹配`}</div>
+      )}
+      <div className="ws-search-results">
+        {results?.map((file) => (
+          <div key={file.path} className="ws-search-file">
+            <div className="ws-search-name" title={file.path}>{file.name}</div>
+            {file.matches.map((m, i) => (
+              <button
+                key={i}
+                className="ws-search-hit"
+                onClick={() => onOpen?.(file.path, query.trim())}
+                title={`${file.path}:${m.line}`}
+              >
+                <span className="ws-search-line">{m.line}</span>
+                <span className="ws-search-text">{m.text}</span>
+              </button>
+            ))}
+          </div>
+        ))}
+      </div>
+    </div>
+  )
+}
diff --git a/src/components/SourceEditor.tsx b/src/components/SourceEditor.tsx
index 8281d38..eaa680e 100644
--- a/src/components/SourceEditor.tsx
+++ b/src/components/SourceEditor.tsx
@@ -7,11 +7,52 @@ import { languages } from '@codemirror/language-data'
 import { syntaxHighlighting, defaultHighlightStyle, indentOnInput, bracketMatching } from '@codemirror/language'
 import { oneDark } from '@codemirror/theme-one-dark'
 import { anchorFromMarkdown, type CursorAnchor } from '../editor/cursorSync'
+import type { FindOptions } from '../editor/search'
 
 export interface SourceEditorApi {
   jumpToLine: (line: number) => void
   getAnchor: () => CursorAnchor | null
   focus: () => void
+  findAll: (query: string, opts: FindOptions) => number
+  gotoMatch: (index: number) => number
+  replaceCurrent: (replacement: string) => boolean
+  replaceAll: (replacement: string) => number
+  clearFind: () => void
+}
+
+/** 在纯文本上复用同一套查找语义（明文/整词/正则），返回偏移命中。 */
+function findInText(text: string, query: string, opts: FindOptions): { from: number; to: number }[] {
+  if (!query) return []
+  const hits: { from: number; to: number }[] = []
+  if (opts.regex) {
+    let re: RegExp
+    try {
+      re = new RegExp(query, opts.caseSensitive ? 'g' : 'gi')
+    } catch (e) {
+      throw new Error(`正则表达式无效：${e instanceof Error ? e.message : String(e)}`)
+    }
+    let m: RegExpExecArray | null
+    while ((m = re.exec(text)) !== null) {
+      if (m[0].length === 0) { re.lastIndex += 1; continue }
+      hits.push({ from: m.index, to: m.index + m[0].length })
+      if (hits.length >= 5000) break
+    }
+    return hits
+  }
+  const haystack = opts.caseSensitive ? text : text.toLowerCase()
+  const needle = opts.caseSensitive ? query : query.toLowerCase()
+  let from = 0
+  while (from <= haystack.length - needle.length) {
+    const hit = haystack.indexOf(needle, from)
+    if (hit < 0) break
+    const end = hit + needle.length
+    const wholeOk = !opts.wholeWord
+      || (!/[A-Za-z0-9_]/.test(text[hit - 1] ?? '') && !/[A-Za-z0-9_]/.test(text[end] ?? ''))
+    if (wholeOk) hits.push({ from: hit, to: end })
+    from = hit + Math.max(1, needle.length)
+    if (hits.length >= 5000) break
+  }
+  return hits
 }
 
 interface Props {
@@ -64,6 +105,29 @@ export default function SourceEditor({ tabId, initialText, initialCursorOffset,
     })
     viewRef.current = view
     view.focus()
+    let matches: { from: number; to: number }[] = []
+    let current = -1
+    let lastQuery = ''
+    let lastOpts: FindOptions | null = null
+    const findAll = (query: string, opts: FindOptions): number => {
+      matches = findInText(view.state.doc.toString(), query, opts)
+      current = matches.length ? 0 : -1
+      lastQuery = query
+      lastOpts = opts
+      return matches.length
+    }
+    const gotoMatch = (index: number): number => {
+      if (matches.length === 0) return -1
+      const wrapped = ((index % matches.length) + matches.length) % matches.length
+      current = wrapped
+      const m = matches[wrapped]
+      view.dispatch({
+        selection: { anchor: m.from, head: m.to },
+        effects: EditorView.scrollIntoView(m.from, { y: 'center' }),
+      })
+      view.focus()
+      return wrapped
+    }
     callbacksRef.current.onReady({
       jumpToLine: (line) => {
         const target = Math.max(1, Math.min(line + 1, view.state.doc.lines))
@@ -73,6 +137,30 @@ export default function SourceEditor({ tabId, initialText, initialCursorOffset,
       },
       getAnchor: () => anchorFromMarkdown(view.state.doc.toString(), view.state.selection.main.head),
       focus: () => view.focus(),
+      findAll,
+      gotoMatch,
+      replaceCurrent: (replacement) => {
+        if (current < 0 || !lastOpts) return false
+        const m = matches[current]
+        if (!m) return false
+        view.dispatch({ changes: { from: m.from, to: m.to, insert: replacement } })
+        view.focus()
+        const previous = current
+        const count = findAll(lastQuery, lastOpts)
+        if (count > 0) gotoMatch(Math.min(previous, count - 1))
+        return true
+      },
+      replaceAll: (replacement) => {
+        if (matches.length === 0) return 0
+        const total = matches.length
+        const changes = [...matches].reverse().map((m) => ({ from: m.from, to: m.to, insert: replacement }))
+        view.dispatch({ changes })
+        view.focus()
+        matches = []
+        current = -1
+        return total
+      },
+      clearFind: () => { matches = []; current = -1 },
     })
     return () => {
       // 卸载前回写最终文本，避免切换瞬间丢失最后一次输入
diff --git a/src/editor/editor.ts b/src/editor/editor.ts
index 6038026..db756b2 100644
--- a/src/editor/editor.ts
+++ b/src/editor/editor.ts
@@ -12,7 +12,7 @@ import { clipboard } from '@milkdown/kit/plugin/clipboard'
 import { indent } from '@milkdown/kit/plugin/indent'
 import { math } from '@milkdown/plugin-math'
 import { upload, uploadConfig, type UploadOptions } from '@milkdown/kit/plugin/upload'
-import { createSyntaxRevealPlugin, createCodeBlockTabPlugin, createTableTabPlugin, selectionInTable } from './plugins'
+import { createSyntaxRevealPlugin, createCodeBlockTabPlugin, createTableTabPlugin, createFocusDimPlugin, selectionInTable } from './plugins'
 import { createListItemViewPlugin, createCodeBlockViewPlugin } from './nodeViews'
 
 export interface CursorInfo { line: number; col: number }
@@ -81,6 +81,7 @@ export function createMarkdownEditor(root: HTMLElement, initialMarkdown: string,
     .use(createSyntaxRevealPlugin())
     .use(createCodeBlockTabPlugin())
     .use(createTableTabPlugin())
+    .use(createFocusDimPlugin())
     .use(createListItemViewPlugin())
     .use(createCodeBlockViewPlugin())
     .use(math)
diff --git a/src/editor/plugins.ts b/src/editor/plugins.ts
index 755911b..eacc230 100644
--- a/src/editor/plugins.ts
+++ b/src/editor/plugins.ts
@@ -166,6 +166,58 @@ export function applyCodeBlockIndent(view: MinimalView, outdent: boolean): boole
   return true
 }
 
+// ————————————————— 专注模式（阶段 6）：非当前顶层块变淡 —————————————————
+
+let focusModeEnabled = false
+export function setFocusModeEnabled(value: boolean) {
+  focusModeEnabled = value
+}
+export function isFocusModeEnabled() {
+  return focusModeEnabled
+}
+
+const focusKey = new PluginKey('new-markdown-focus')
+
+export function createFocusDimPlugin() {
+  return $prose(() => new Plugin({
+    key: focusKey,
+    state: {
+      init: () => DecorationSet.empty,
+      apply: (tr, old, _oldState, newState) => {
+        if (!focusModeEnabled) return DecorationSet.empty
+        if (!tr.selectionSet && !tr.docChanged && !tr.getMeta(focusKey)) return old
+        const { doc, selection } = newState
+        const anchor = selection.$from
+        // 找选区所在的顶层块范围
+        let activeFrom = -1
+        let activeTo = -1
+        if (anchor.depth >= 1) {
+          activeFrom = anchor.before(1)
+          activeTo = anchor.after(1)
+        }
+        const decorations: Decoration[] = []
+        doc.forEach((node, offset) => {
+          const from = offset
+          const to = offset + node.nodeSize
+          if (from !== activeFrom || to !== activeTo) {
+            decorations.push(Decoration.node(from, to, { class: 'focus-dim' }))
+          }
+        })
+        return DecorationSet.create(doc, decorations)
+      },
+    },
+    props: {
+      decorations: (state) => focusKey.getState(state) as DecorationSet,
+    },
+  }))
+}
+
+/** 触发专注装饰立即重算（开关切换时调用）。 */
+export function refreshFocusDecorations(view: { state: never; dispatch: (tr: never) => void }) {
+  const v = view as unknown as { state: { tr: { setMeta: (k: unknown, val: unknown) => unknown } }; dispatch: (tr: unknown) => void }
+  v.dispatch(v.state.tr.setMeta(focusKey, true))
+}
+
 // ————————————————— 表格 Tab 导航（阶段 3） —————————————————
 
 interface AncestorLike {
diff --git a/src/editor/search.ts b/src/editor/search.ts
new file mode 100644
index 0000000..f121008
--- /dev/null
+++ b/src/editor/search.ts
@@ -0,0 +1,102 @@
+// 文档内查找（阶段 6）：把 ProseMirror 文档拍平成「字符 → 文档位置」索引，
+// 在索引上做纯字符串/正则匹配，再把命中映射回文档位置（含跨文本节点、避开跨块命中）。
+// 纯逻辑与索引构建分离，便于单测；编辑器侧的选区/替换在 EditorPane 里走事务。
+
+export interface FindOptions {
+  caseSensitive: boolean
+  wholeWord: boolean
+  regex: boolean
+}
+
+export interface TextIndex {
+  text: string
+  /** 与 text 等长：每字符的文档位置；块间分隔符为 -1 */
+  positions: number[]
+}
+
+interface PmTextNode {
+  isText: boolean
+  text?: string
+}
+interface PmDocLike {
+  descendants: (fn: (node: PmTextNode, pos: number) => void | boolean) => void
+}
+
+export function buildTextIndex(doc: PmDocLike): TextIndex {
+  const chars: string[] = []
+  const positions: number[] = []
+  let lastEnd = -1
+  doc.descendants((node, pos) => {
+    if (!node.isText || !node.text) return
+    if (lastEnd >= 0 && pos > lastEnd) {
+      // 与上一文本段之间隔着块边界：放一个分隔符，跨块命中会被过滤掉
+      chars.push('\n')
+      positions.push(-1)
+    }
+    for (let i = 0; i < node.text.length; i++) {
+      chars.push(node.text[i])
+      positions.push(pos + i)
+    }
+    lastEnd = pos + node.text.length
+  })
+  return { text: chars.join(''), positions }
+}
+
+export interface MatchRange {
+  /** 索引内起止（映射前） */
+  start: number
+  end: number
+  /** 文档位置 */
+  from: number
+  to: number
+}
+
+const WORD_CHAR = /[A-Za-z0-9_]/
+
+function isWholeWordAt(text: string, start: number, end: number): boolean {
+  const before = start > 0 ? text[start - 1] : ''
+  const after = end < text.length ? text[end] : ''
+  return !WORD_CHAR.test(before) && !WORD_CHAR.test(after)
+}
+
+export function findInIndex(index: TextIndex, query: string, opts: FindOptions): MatchRange[] {
+  if (!query) return []
+  const ranges: { start: number; end: number }[] = []
+  if (opts.regex) {
+    let re: RegExp
+    try {
+      re = new RegExp(query, opts.caseSensitive ? 'g' : 'gi')
+    } catch (e) {
+      throw new Error(`正则表达式无效：${e instanceof Error ? e.message : String(e)}`)
+    }
+    let m: RegExpExecArray | null
+    while ((m = re.exec(index.text)) !== null) {
+      if (m[0].length === 0) {
+        re.lastIndex += 1
+        continue
+      }
+      ranges.push({ start: m.index, end: m.index + m[0].length })
+      if (ranges.length >= 5000) break
+    }
+  } else {
+    const haystack = opts.caseSensitive ? index.text : index.text.toLowerCase()
+    const needle = opts.caseSensitive ? query : query.toLowerCase()
+    let from = 0
+    while (from <= haystack.length - needle.length) {
+      const hit = haystack.indexOf(needle, from)
+      if (hit < 0) break
+      ranges.push({ start: hit, end: hit + needle.length })
+      from = hit + Math.max(1, needle.length)
+      if (ranges.length >= 5000) break
+    }
+  }
+  const out: MatchRange[] = []
+  for (const r of ranges) {
+    if (opts.wholeWord && !opts.regex && !isWholeWordAt(index.text, r.start, r.end)) continue
+    const fromPos = index.positions[r.start]
+    const toPos = index.positions[r.end - 1]
+    if (fromPos < 0 || toPos < 0) continue // 跨块命中，跳过
+    out.push({ ...r, from: fromPos, to: toPos + 1 })
+  }
+  return out
+}
diff --git a/src/services/platform.ts b/src/services/platform.ts
index 88019c7..854a9ad 100644
--- a/src/services/platform.ts
+++ b/src/services/platform.ts
@@ -274,3 +274,20 @@ export function pickAndReadWebImport(): Promise<{ name: string; text?: string; b
     input.click()
   })
 }
+
+// ————————————————— 阶段 6：工作区全文搜索 —————————————————
+
+export interface WorkspaceSearchMatch {
+  line: number
+  text: string
+}
+
+export interface WorkspaceSearchFile {
+  path: string
+  name: string
+  matches: WorkspaceSearchMatch[]
+}
+
+export async function workspaceSearch(root: string, query: string, caseSensitive: boolean): Promise<WorkspaceSearchFile[]> {
+  return invoke<WorkspaceSearchFile[]>('workspace_search', { root, query, caseSensitive })
+}
diff --git a/src/styles.css b/src/styles.css
index 15345f1..0ca4358 100644
--- a/src/styles.css
+++ b/src/styles.css
@@ -266,3 +266,36 @@ kbd { background: var(--code-bg); border: 1px solid var(--border); border-radius
 .seconds-input { width: 72px; margin: 0 6px; }
 .modal-actions.left { align-items: stretch; }
 .modal-actions.left button { text-align: left; }
+.ws-search { display: flex; flex-direction: column; gap: 8px; padding: 10px; min-height: 0; }
+.ws-search-box { display: flex; gap: 6px; }
+.ws-search-box .input { flex: 1; min-width: 0; }
+.ws-search-case { font-size: 12px; color: var(--text-dim); display: flex; gap: 5px; align-items: center; }
+.ws-search-summary { font-size: 12px; color: var(--text-dim); }
+.ws-search-results { overflow-y: auto; display: flex; flex-direction: column; gap: 10px; }
+.ws-search-name { font-weight: 600; font-size: 12.5px; margin-bottom: 3px; }
+.ws-search-hit { display: flex; gap: 7px; width: 100%; text-align: left; border: 0; background: transparent; padding: 3px 6px; border-radius: 6px; cursor: pointer; font-size: 12.5px; align-items: baseline; }
+.ws-search-hit:hover { background: var(--accent-weak); }
+.ws-search-line { color: var(--text-dim); flex: none; min-width: 26px; text-align: right; }
+.ws-search-text { white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
+.findbar { position: absolute; top: 8px; right: 14px; z-index: 40; background: var(--panel); border: 1px solid var(--border); border-radius: 10px; box-shadow: 0 8px 24px rgba(15, 23, 42, 0.14); padding: 6px 8px; display: flex; flex-direction: column; gap: 6px; min-width: 380px; }
+.findbar-row { display: flex; align-items: center; gap: 5px; }
+.find-input { flex: 1; min-width: 130px; height: 28px; }
+.find-toggle { border: 1px solid transparent; background: transparent; border-radius: 6px; padding: 3px 7px; font-size: 12px; cursor: pointer; color: var(--text-dim); }
+.find-toggle.on { background: var(--accent-weak); color: var(--accent); border-color: var(--accent); }
+.find-icon { border: 0; background: transparent; border-radius: 6px; padding: 3px 7px; cursor: pointer; color: var(--text-dim); }
+.find-icon:hover { background: var(--accent-weak); }
+.find-count { font-size: 12px; color: var(--text-dim); min-width: 74px; text-align: center; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
+.find-action { border: 1px solid var(--border); background: var(--panel); border-radius: 6px; padding: 4px 10px; font-size: 12.5px; cursor: pointer; }
+.find-action:hover { background: var(--accent-weak); }
+.find-spacer { width: 26px; flex: none; }
+.focus-dim { opacity: 0.32; transition: opacity 0.25s ease; }
+.shortcut-list { max-height: 46vh; overflow-y: auto; display: flex; flex-direction: column; }
+.shortcut-row { display: flex; align-items: center; gap: 7px; padding: 4px 2px; border-bottom: 1px solid var(--border); font-size: 13px; }
+.shortcut-row .shortcut-name { flex: 1; }
+.shortcut-row kbd { min-width: 118px; text-align: center; }
+.shortcut-row button { border: 1px solid var(--border); background: var(--panel); border-radius: 6px; padding: 2px 8px; font-size: 12px; cursor: pointer; }
+.shortcut-row button:disabled { opacity: 0.4; cursor: default; }
+.shortcut-subtitle { margin: 12px 0 4px; font-size: 13px; }
+.conflict-note { display: flex; align-items: center; gap: 8px; }
+.findbar { position: absolute; }
+.editor-scroll { position: relative; }
diff --git a/src/utils/shortcuts.ts b/src/utils/shortcuts.ts
new file mode 100644
index 0000000..8fb49b7
--- /dev/null
+++ b/src/utils/shortcuts.ts
@@ -0,0 +1,113 @@
+// 快捷键注册表（阶段 6）：应用级快捷键集中定义，支持用户覆盖与冲突处理。
+// 组合键统一格式：ctrl/alt/shift 以 '+' 连接 + 小写主键，如 'ctrl+shift+s'。
+
+export interface ShortcutDef {
+  id: string
+  label: string
+  defaultCombo: string
+}
+
+export const SHORTCUT_DEFS: ShortcutDef[] = [
+  { id: 'new', label: '新建文档', defaultCombo: 'ctrl+n' },
+  { id: 'open', label: '打开文件', defaultCombo: 'ctrl+o' },
+  { id: 'save', label: '保存', defaultCombo: 'ctrl+s' },
+  { id: 'saveAs', label: '另存为', defaultCombo: 'ctrl+shift+s' },
+  { id: 'closeTab', label: '关闭标签页', defaultCombo: 'ctrl+w' },
+  { id: 'find', label: '查找', defaultCombo: 'ctrl+f' },
+  { id: 'replace', label: '替换', defaultCombo: 'ctrl+h' },
+  { id: 'sidebar', label: '显示/隐藏侧边栏', defaultCombo: 'ctrl+shift+l' },
+  { id: 'link', label: '插入链接', defaultCombo: 'ctrl+k' },
+  { id: 'image', label: '插入图片', defaultCombo: 'ctrl+shift+i' },
+  { id: 'table', label: '插入表格', defaultCombo: 'ctrl+t' },
+  { id: 'blockquote', label: '引用', defaultCombo: 'ctrl+shift+q' },
+  { id: 'codeBlock', label: '代码块', defaultCombo: 'ctrl+shift+k' },
+  { id: 'paragraph', label: '段落', defaultCombo: 'ctrl+0' },
+  ...[1, 2, 3, 4, 5, 6].map((lv) => ({
+    id: `heading${lv}`,
+    label: `${'一二三四五六'[lv - 1]}级标题`,
+    defaultCombo: `ctrl+${lv}`,
+  })),
+  { id: 'print', label: '打印 / 导出 PDF', defaultCombo: 'ctrl+p' },
+  { id: 'zoomIn', label: '放大', defaultCombo: 'ctrl+=' },
+  { id: 'zoomOut', label: '缩小', defaultCombo: 'ctrl+-' },
+]
+
+/** 编辑器内置快捷键（Milkdown/ProseMirror 提供，本中心只展示、不可改绑）。 */
+export const BUILTIN_SHORTCUTS: [string, string][] = [
+  ['加粗', 'Ctrl+B'],
+  ['斜体', 'Ctrl+I'],
+  ['撤销 / 重做', 'Ctrl+Z / Ctrl+Y'],
+  ['表格内跳转单元格', 'Tab / Shift+Tab'],
+  ['代码块缩进', 'Tab / Shift+Tab'],
+  ['源码模式切换', '菜单/工具栏按钮'],
+]
+
+export function comboFromEvent(e: { ctrlKey: boolean; metaKey: boolean; altKey: boolean; shiftKey: boolean; key: string }): string | null {
+  const key = e.key
+  if (['Control', 'Meta', 'Alt', 'Shift'].includes(key)) return null
+  let main = key.length === 1 ? key.toLowerCase() : key.toLowerCase()
+  if (main === ' ') main = 'space'
+  if (main === '+') main = '='
+  const parts: string[] = []
+  if (e.ctrlKey || e.metaKey) parts.push('ctrl')
+  if (e.altKey) parts.push('alt')
+  if (e.shiftKey) parts.push('shift')
+  parts.push(main)
+  return parts.join('+')
+}
+
+/** 计算生效绑定：动作 id -> 组合键（覆盖值 '' 表示解绑）。 */
+export function effectiveCombos(overrides: Record<string, string>): Map<string, string> {
+  const map = new Map<string, string>()
+  for (const def of SHORTCUT_DEFS) {
+    const override = overrides[def.id]
+    const combo = override === undefined ? def.defaultCombo : override
+    if (combo) map.set(def.id, combo)
+  }
+  return map
+}
+
+/** 组合键 -> 动作 id；冲突时后出现的覆盖（用户覆盖优先于默认）。 */
+export function resolveShortcuts(overrides: Record<string, string>): Map<string, string> {
+  const byId = effectiveCombos(overrides)
+  const byCombo = new Map<string, string>()
+  // 先放默认值，再放用户覆盖，保证覆盖胜出
+  for (const def of SHORTCUT_DEFS) {
+    if (overrides[def.id] === undefined) {
+      const combo = byId.get(def.id)
+      if (combo) byCombo.set(combo, def.id)
+    }
+  }
+  for (const def of SHORTCUT_DEFS) {
+    if (overrides[def.id] !== undefined) {
+      const combo = byId.get(def.id)
+      if (combo) byCombo.set(combo, def.id)
+    }
+  }
+  return byCombo
+}
+
+/** 组合键的展示形式：'ctrl+shift+s' -> 'Ctrl+Shift+S'。 */
+export function prettyCombo(combo: string): string {
+  if (!combo) return '（未绑定）'
+  return combo
+    .split('+')
+    .map((part) => {
+      if (part === 'ctrl') return 'Ctrl'
+      if (part === 'alt') return 'Alt'
+      if (part === 'shift') return 'Shift'
+      if (part === 'space') return 'Space'
+      return part.length === 1 ? part.toUpperCase() : part
+    })
+    .join('+')
+}
+
+/** 查组合键当前被哪个动作占用（排除指定动作自身）。 */
+export function comboOwner(combo: string, overrides: Record<string, string>, excludeId?: string): ShortcutDef | null {
+  const byId = effectiveCombos(overrides)
+  for (const def of SHORTCUT_DEFS) {
+    if (def.id === excludeId) continue
+    if (byId.get(def.id) === combo) return def
+  }
+  return null
+}
diff --git a/tests/perf.test.ts b/tests/perf.test.ts
new file mode 100644
index 0000000..6274e38
--- /dev/null
+++ b/tests/perf.test.ts
@@ -0,0 +1,56 @@
+// 性能基准（阶段 6）：默认跳过，PERF_BENCH=1 时运行。
+// 口径：jsdom + Node（无真实浏览器渲染管线），只测「解析建模 + 序列化」耗时，
+// 不是 WebView2 真机输入延迟；真机口径见 docs/10 §3 的 Windows 清单。
+declare const process: { env: Record<string, string | undefined> }
+import { describe, it, expect } from 'vitest'
+import { createMarkdownEditor, getMarkdown } from '../src/editor/editor'
+
+const BLOCK = `## 性能小节标题
+
+这是一个包含**粗体**、*斜体*、[链接](https://example.com) 与 \`行内代码\` 的段落，
+用来模拟真实写作内容。第二句继续填充文本，让段落长度接近真实文档。
+
+- 列表项一
+- 列表项二
+- 任务 [x] 已完成
+
+\`\`\`ts
+const answer: number = 42
+console.log(answer)
+\`\`\`
+
+| 列 A | 列 B |
+| --- | --- |
+| 1 | 2 |
+
+`
+
+function makeDoc(targetBytes: number): string {
+  let out = '# 性能基准文档\n\n'
+  while (new TextEncoder().encode(out).length < targetBytes) out += BLOCK
+  return out
+}
+
+const enabled = process.env.PERF_BENCH === '1'
+
+describe.skipIf(!enabled)('性能基准（PERF_BENCH=1）', () => {
+  it.each([100 * 1024, 1024 * 1024])('打开并序列化 %i 字节文档', async (size) => {
+    const md = makeDoc(size)
+    const host = document.createElement('div')
+    document.body.appendChild(host)
+    const t0 = performance.now()
+    let serialized = ''
+    const editor = createMarkdownEditor(host, md, {
+      onMarkdown: (text) => { serialized = text },
+    })
+    await editor.create()
+    const createMs = performance.now() - t0
+    const t1 = performance.now()
+    const out = getMarkdown(editor)
+    const serializeMs = performance.now() - t1
+    console.table([{ 目标大小KB: Math.round(size / 1024), 实际字符: md.length, 建模ms: Math.round(createMs), 序列化ms: Math.round(serializeMs), 首轮回调字符: serialized.length }])
+    expect(out.length).toBeGreaterThan(md.length * 0.9)
+    await editor.destroy()
+    host.remove()
+  }, 300_000)
+})
diff --git a/tests/stage6.test.ts b/tests/stage6.test.ts
new file mode 100644
index 0000000..63b00f4
--- /dev/null
+++ b/tests/stage6.test.ts
@@ -0,0 +1,126 @@
+// 阶段 6 测试：文档查找索引与匹配（桩文档 + 真实编辑器）、快捷键注册表、专注模式装饰。
+import { describe, it, expect } from 'vitest'
+import { buildTextIndex, findInIndex, type FindOptions } from '../src/editor/search'
+import { comboFromEvent, effectiveCombos, resolveShortcuts, prettyCombo, comboOwner, SHORTCUT_DEFS } from '../src/utils/shortcuts'
+import { createMarkdownEditor, getMarkdown } from '../src/editor/editor'
+import { setFocusModeEnabled } from '../src/editor/plugins'
+
+const OPTS: FindOptions = { caseSensitive: false, wholeWord: false, regex: false }
+
+/** 桩文档：按 ProseMirror descendants 语义回放文本节点与位置。 */
+function stubDoc(segments: { text: string; pos: number }[]) {
+  return {
+    descendants: (fn: (node: { isText: boolean; text?: string }, pos: number) => void) => {
+      for (const seg of segments) fn({ isText: true, text: seg.text }, seg.pos)
+    },
+  }
+}
+
+describe('查找索引与匹配', () => {
+  it('跨文本节点命中能映射回连续文档位置', () => {
+    // "Hello " 与 "World" 是两个文本节点（如中间有格式标记）
+    const index = buildTextIndex(stubDoc([{ text: 'Hello ', pos: 1 }, { text: 'World', pos: 7 }]))
+    const hits = findInIndex(index, 'o w', OPTS)
+    expect(hits).toHaveLength(1)
+    expect(hits[0].from).toBe(5)
+    expect(hits[0].to).toBe(8)
+  })
+
+  it('跨块命中被跳过（块间分隔符）', () => {
+    const index = buildTextIndex(stubDoc([{ text: 'abc', pos: 1 }, { text: 'def', pos: 6 }]))
+    expect(findInIndex(index, 'cdef', OPTS)).toHaveLength(0)
+    expect(findInIndex(index, 'def', OPTS)).toHaveLength(1)
+  })
+
+  it('大小写/整词/正则选项', () => {
+    const index = buildTextIndex(stubDoc([{ text: 'Cat cat scatter CAT', pos: 1 }]))
+    expect(findInIndex(index, 'cat', OPTS)).toHaveLength(4)
+    expect(findInIndex(index, 'cat', { ...OPTS, caseSensitive: true })).toHaveLength(2)
+    expect(findInIndex(index, 'cat', { ...OPTS, wholeWord: true })).toHaveLength(3)
+    expect(findInIndex(index, 'c.t', { ...OPTS, regex: true })).toHaveLength(4)
+    expect(() => findInIndex(index, '(', { ...OPTS, regex: true })).toThrow(/正则表达式无效/)
+  })
+
+  it('真实编辑器文档可查且替换后文本正确', async () => {
+    const host = document.createElement('div')
+    document.body.appendChild(host)
+    const editor = createMarkdownEditor(host, '# 标题\n\nhello 世界 hello\n')
+    await editor.create()
+    const { editorViewCtx } = await import('@milkdown/kit/core')
+    const { TextSelection } = await import('@milkdown/kit/prose/state')
+    const matches = editor.action((ctx) => {
+      const view = ctx.get(editorViewCtx)
+      return findInIndex(buildTextIndex(view.state.doc), 'hello', OPTS)
+    })
+    expect(matches).toHaveLength(2)
+    editor.action((ctx) => {
+      const view = ctx.get(editorViewCtx)
+      const m = matches[0]
+      view.dispatch(view.state.tr.setSelection(TextSelection.create(view.state.doc, m.from, m.to)))
+      expect(view.state.doc.textBetween(m.from, m.to)).toBe('hello')
+      view.dispatch(view.state.tr.insertText('HELLO', m.from, m.to))
+    })
+    expect(getMarkdown(editor)).toContain('HELLO 世界 hello')
+    await editor.destroy()
+    host.remove()
+  })
+})
+
+describe('快捷键注册表', () => {
+  it('默认绑定完整且无组合键冲突', () => {
+    const resolved = resolveShortcuts({})
+    expect(resolved.get('ctrl+s')).toBe('save')
+    expect(resolved.get('ctrl+f')).toBe('find')
+    expect(resolved.get('ctrl+1')).toBe('heading1')
+    const combos = SHORTCUT_DEFS.map((d) => d.defaultCombo)
+    expect(new Set(combos).size).toBe(combos.length)
+  })
+
+  it('覆盖、解绑与冲突查询', () => {
+    const overrides = { find: 'ctrl+shift+f', save: '' }
+    const resolved = resolveShortcuts(overrides)
+    expect(resolved.get('ctrl+shift+f')).toBe('find')
+    expect(resolved.get('ctrl+f')).toBeUndefined()
+    expect(resolved.get('ctrl+s')).toBeUndefined()
+    expect(effectiveCombos(overrides).has('save')).toBe(false) // 解绑后不在生效表内
+    expect(comboOwner('ctrl+shift+f', {}, 'find')?.id).toBeUndefined
+    expect(comboOwner('ctrl+s', {})?.id).toBe('save')
+    // 改绑到他人组合键时覆盖优先
+    expect(resolveShortcuts({ find: 'ctrl+s' }).get('ctrl+s')).toBe('find')
+  })
+
+  it('事件组合键归一化与展示', () => {
+    expect(comboFromEvent({ ctrlKey: true, metaKey: false, altKey: false, shiftKey: true, key: 'S' })).toBe('ctrl+shift+s')
+    expect(comboFromEvent({ ctrlKey: true, metaKey: false, altKey: false, shiftKey: true, key: '+' })).toBe('ctrl+shift+=')
+    expect(comboFromEvent({ ctrlKey: true, metaKey: false, altKey: false, shiftKey: false, key: 'Control' })).toBeNull()
+    expect(prettyCombo('ctrl+shift+s')).toBe('Ctrl+Shift+S')
+    expect(prettyCombo('')).toBe('（未绑定）')
+  })
+})
+
+describe('专注模式装饰', () => {
+  it('开启后非当前块获得 focus-dim 类，关闭后消失', async () => {
+    const host = document.createElement('div')
+    document.body.appendChild(host)
+    setFocusModeEnabled(true)
+    const editor = createMarkdownEditor(host, '第一段文字。\n\n第二段文字。\n\n第三段文字。\n')
+    await editor.create()
+    const { editorViewCtx } = await import('@milkdown/kit/core')
+    const { TextSelection } = await import('@milkdown/kit/prose/state')
+    editor.action((ctx) => {
+      const view = ctx.get(editorViewCtx)
+      // 把光标放到第一段，触发一次选区变化让装饰重算
+      view.dispatch(view.state.tr.setSelection(TextSelection.create(view.state.doc, 2)))
+    })
+    const dimmed = host.querySelectorAll('.focus-dim')
+    expect(dimmed.length).toBe(2)
+    setFocusModeEnabled(false)
+    editor.action((ctx) => {
+      const view = ctx.get(editorViewCtx)
+      view.dispatch(view.state.tr.setSelection(TextSelection.create(view.state.doc, 3)))
+    })
+    expect(host.querySelectorAll('.focus-dim').length).toBe(0)
+    await editor.destroy()
+    host.remove()
+  })
+})