diff --git a/e2e/document-renderer.playwright.ts b/e2e/document-renderer.playwright.ts
index 0c8769b..c6ef8a0 100644
--- a/e2e/document-renderer.playwright.ts
+++ b/e2e/document-renderer.playwright.ts
@@ -19,6 +19,7 @@ const UNCTRL = { doc: env('RBA_UNCTRL_DOC'), title: env('RBA_UNCTRL_TITLE') }
 const GENERAL = { id: env('RBA_GENERAL_PROFILE'), version: env('RBA_GENERAL_VERSION') }
 const TEMPLATE_PROFILE = `company.${env('RBA_TEMPLATE')}`
 const ANNOTATION = `§11 批注 ${RUN}：请补充目标量化指标`
+const RANGE_ANNOTATION = `§11 范围批注 ${RUN}：「目标」需可量化`
 const REVISION_AFTER = `§11 修订 ${RUN}：目标改为三项可量化指标`
 
 test.skip(!process.env.PLAYWRIGHT_BASE_URL || !OUT, 'set PLAYWRIGHT_BASE_URL and RBA_OUT (browser-acceptance.sh drives this suite)')
@@ -433,6 +434,37 @@ test('§11-5b 审核人添加批注与修订', async ({ browser }) => {
   await expect(review.locator('.drw-diff-add', { hasText: REVISION_AFTER })).toBeVisible({ timeout: 30_000 })
   await expect(review.locator('.drw-anno-group .drw-anno-node').first()).toHaveText('项目内容、目标及意义')
   await expect(page.locator('.drw-canvas-node[title="项目内容、目标及意义"] .drw-badge.review').first()).toBeVisible()
+
+  // 范围批注（06 §2）：阅读视图选中节点正文「目标」（码点 5..7），载荷带偏移与摘录，不带 textHash/range。
+  await page.getByRole('tab', { name: '阅读视图' }).click()
+  const nodeText = page.locator('section.drw-reader-node.sel [data-anchor-node]')
+  await expect(nodeText).toHaveText('项目内容、目标及意义')
+  await nodeText.evaluate(el => {
+    const range = document.createRange()
+    range.setStart(el.firstChild!, 5)
+    range.setEnd(el.firstChild!, 7)
+    const sel = window.getSelection()!
+    sel.removeAllRanges()
+    sel.addRange(range)
+    el.dispatchEvent(new MouseEvent('mouseup', { bubbles: true }))
+  })
+  await expect(review.locator('.drw-composer-quote')).toHaveText('「目标」')
+  await review.getByLabel('批注内容').fill(RANGE_ANNOTATION)
+  await review.getByRole('button', { name: '添加批注' }).click()
+  const annotateCalls = () => s.net.filter(n => n.url.includes('/api/commands/rdm.render.review.annotate') && parseJson(n.request)?.params?.text === RANGE_ANNOTATION)
+  await expect.poll(() => annotateCalls().length, { message: '应分发范围批注', timeout: 30_000 }).toBeGreaterThan(0)
+  const rangeCall = annotateCalls().at(-1)!
+  const rangeParams = parseJson(rangeCall.request)?.params
+  expect(rangeParams, '范围批注载荷').toMatchObject({ textStart: 5, textEnd: 7, quote: '目标' })
+  expect(rangeParams).not.toHaveProperty('textHash')
+  expect(rangeParams).not.toHaveProperty('range')
+  note(`范围批注回执：${rangeCall.body.slice(0, 300)}`)
+  const rangeItem = review.locator('.drw-anno', { hasText: RANGE_ANNOTATION })
+  const anchored = await rangeItem.locator('.drw-anno-quote').waitFor({ timeout: 30_000 }).then(() => true, () => false)
+  if (anchored) await expect(rangeItem.locator('.drw-anno-quote')).toHaveText('目标')
+  expect.soft(anchored, `GAP[RDM] 范围批注未按所选文字保存（回执：${rangeCall.body.slice(0, 200)}）`).toBe(true)
+  await page.getByRole('tab', { name: '结构画布' }).click()
+
   await expectReadableFailures(page)
   await shot(page, 'item5b-review-annotations')
   await s.close()
diff --git a/src/components/DocumentRenderWorkspace.tsx b/src/components/DocumentRenderWorkspace.tsx
index a006b39..90b3c89 100644
--- a/src/components/DocumentRenderWorkspace.tsx
+++ b/src/components/DocumentRenderWorkspace.tsx
@@ -16,14 +16,14 @@ import {
   groupDiagnostics, hasFacts, layoutMindMap, loadDeliveryDiagnostics, locateDiagnostic, locateNodeId, mergeDeliveries, moveSelection,
   nextOperation, nodeAnchorId, nodeFacts, normalizeDeliveries, normalizeDownload, normalizeProfiles, normalizeRenderTrace,
   normalizeReviewView, partitionAnnotations, partitionRevisions, profileOptionViews, receiptStateView, renderScope,
-  reviewTargetNode, revisePayload, submissionIdOf, traceAnchor, traceEndpointLabel, traceTypeLabel, truncateMiddle,
+  reviewTargetNode, revisePayload, selectionAnchor, submissionIdOf, traceAnchor, traceEndpointLabel, traceTypeLabel, truncateMiddle,
   validateReviewText, visibleNodeIds, visibleOrder, walkDocTree,
   decisionEntries, decisionPayload, normalizeDocSubmission, currentBindings, bindableRules, normalizeCandidateRules,
   profileBindPayload, profileUnbindPayload, projectSettingsAllowed, docTypeKeyOf, diagnosticCodeLabel, createSingleFlight,
   type BindSource, type DecisionKind, type RuleRef,
   type DocFilter, type DocTree, type DownloadKind, type NodeFacts, type OperationKind,
   type RenderDelivery, type RenderDiagnostic, type RenderOperation, type RenderProfiles, type RenderTrace,
-  type RenderTraceEntry, type ReviewAnnotation, type ReviewRevision,
+  type RenderTraceEntry, type ReviewAnnotation, type ReviewRevision, type SelectionHit, type TextAnchor,
 } from '../documentRenderPresentation'
 
 // ---- 文件保存（交付物与审计导出共用；类型取服务端 contentType，不在客户端重算校验） ----
@@ -170,12 +170,19 @@ function Byline({ name, at }: { name: string; at: string }) {
 
 function AnnotationItem({ a, onReply }: { a: ReviewAnnotation; onReply?: (a: ReviewAnnotation) => void }) {
   return (
-    <div className={`drw-anno${a.resolved ? ' resolved' : ''}`}>
+    <div className={`drw-anno${a.resolved ? ' resolved' : ''}${a.needsReanchor ? ' needs-reanchor' : ''}`}>
       <div className="drw-anno-head">
         <Byline name={a.author.displayName} at={a.createdAt} />
+        {a.needsReanchor && <Chip tone="warn">需重新锚定</Chip>}
         {a.resolved && <Chip tone="ok">已解决</Chip>}
         {onReply && <button type="button" className="drw-link" onClick={() => onReply(a)}>回复</button>}
       </div>
+      {a.quote && <blockquote className="drw-anno-quote" title={a.quote}>{a.quote}</blockquote>}
+      {a.needsReanchor && (
+        <div className="drw-anno-reanchor">
+          原文已变化，批注范围不再匹配{a.quote ? '；上方为旧摘录' : ''}。留痕稿将其列入孤立批注附录，不会自动迁移
+        </div>
+      )}
       <div className="drw-anno-text">{a.text}</div>
       {a.replies.length > 0 && (
         <div className="drw-anno-replies">
@@ -593,7 +600,34 @@ function StructureCanvas({ tree, order, visible, selectedId, onSelect, badges, r
   )
 }
 
-function ReaderView({ tree, order, visible, selectedId, onSelect, badges, facts, revealSeq }: ViewProps) {
+/** 选区与各 [data-anchor-node] 正文元素的交集；端点在元素外时裁到元素首尾。 */
+function selectionHits(root: HTMLElement, range: Range): SelectionHit[] {
+  const hits: SelectionHit[] = []
+  for (const el of root.querySelectorAll<HTMLElement>('[data-anchor-node]')) {
+    if (!range.intersectsNode(el)) continue
+    const text = el.textContent ?? ''
+    const whole = document.createRange()
+    whole.selectNodeContents(el)
+    const offsetOf = (node: Node, offset: number) => {
+      const side = whole.comparePoint(node, offset)
+      if (side !== 0) return side < 0 ? 0 : text.length
+      const head = document.createRange()
+      head.setStart(el, 0)
+      head.setEnd(node, offset)
+      return head.toString().length
+    }
+    hits.push({ nodeId: el.dataset.anchorNode ?? '', text, start: offsetOf(range.startContainer, range.startOffset), end: offsetOf(range.endContainer, range.endOffset) })
+  }
+  return hits
+}
+
+type TextSelection = ReturnType<typeof selectionAnchor>
+
+// 标题用 role=button 的 span 而非 <button>：浏览器不允许拖选按钮内文字，范围批注需要选中标题正文。
+function ReaderView({ tree, order, visible, selectedId, onSelect, badges, facts, revealSeq, onTextSelect }: ViewProps & {
+  /** 提供时节点正文可选中并按选区记录批注范围（有审阅提交且可批注）。 */
+  onTextSelect?: (selection: TextSelection) => void
+}) {
   const ref = useRef<HTMLDivElement>(null)
   const wantFocus = useFocusSelected(ref, selectedId, revealSeq)
   const onKey = (e: KeyboardEvent) => {
@@ -603,20 +637,31 @@ function ReaderView({ tree, order, visible, selectedId, onSelect, badges, facts,
     wantFocus.current = true
     onSelect(next)
   }
+  const onMouseUp = () => {
+    if (!onTextSelect || !ref.current) return
+    const sel = window.getSelection()
+    onTextSelect(selectionAnchor(!sel || sel.rangeCount === 0 || sel.isCollapsed ? null : selectionHits(ref.current, sel.getRangeAt(0))))
+  }
   return (
-    <div ref={ref} className="drw-reader" onKeyDown={onKey}>
+    <div ref={ref} className="drw-reader" onKeyDown={onKey} onMouseUp={onMouseUp}>
       {visibleOrder(tree, visible).map(id => {
         const n = tree.nodes[id]
         const level = Math.min(n.depth + 2, 5)
         const Heading = `h${level}` as 'h2' | 'h3' | 'h4' | 'h5'
         const f = facts[id]
+        const activate = (e: KeyboardEvent) => {
+          if (e.key !== 'Enter' && e.key !== ' ') return
+          e.preventDefault()
+          onSelect(id)
+        }
         return (
           <section key={id} id={nodeAnchorId(id)} className={`drw-reader-node${selectedId === id ? ' sel' : ''}`}>
             <Heading className="drw-reader-heading">
-              <button type="button" className="drw-reader-title" data-node-id={id} aria-current={selectedId === id ? 'true' : undefined}
-                tabIndex={selectedId === id || (!selectedId && id === tree.rootId) ? 0 : -1} onClick={() => onSelect(id)}>
+              <span role="button" className="drw-reader-title" data-node-id={id} aria-current={selectedId === id ? 'true' : undefined}
+                data-anchor-node={onTextSelect && n.kind !== 'doc' ? id : undefined}
+                tabIndex={selectedId === id || (!selectedId && id === tree.rootId) ? 0 : -1} onClick={() => onSelect(id)} onKeyDown={activate}>
                 {n.title}
-              </button>
+              </span>
               <a className="drw-anchor" href={`#${nodeAnchorId(id)}`} aria-label={`${n.title} 的锚点`}>¶</a>
               {badges(id)}
               {n.state && <Chip tone={n.state === 'baselined' ? 'ok' : 'plain'}>{n.state}</Chip>}
@@ -631,10 +676,38 @@ function ReaderView({ tree, order, visible, selectedId, onSelect, badges, facts,
 
 // ---- 审阅输入 ----
 
-function ReviewComposer({ nodeTitle, replyTo, onCancelReply, canAnnotate, canRevise, busy, onAnnotate, onRevise }: {
+/** 批注范围：回复沿用父批注范围；有选区显示摘录，否则为整个节点；选区无效时给出说明。 */
+export function AnnotationScope({ anchor, notice, replying, onClear }: {
+  anchor: TextAnchor | null
+  notice: string
+  replying: boolean
+  onClear: () => void
+}) {
+  if (replying) return <div className="drw-composer-scope drw-muted">回复沿用原批注的范围</div>
+  return (
+    <>
+      <div className="drw-composer-scope">
+        <span className="drw-muted">范围</span>
+        {anchor ? (
+          <>
+            <span className="drw-composer-quote" title={anchor.quote}>「{anchor.quote}」</span>
+            <span className="drw-muted">第 {anchor.textStart + 1}–{anchor.textEnd} 字</span>
+            <button type="button" className="drw-link" onClick={onClear}>改为整个节点</button>
+          </>
+        ) : <span className="drw-muted">整个节点（在阅读视图中选中该节点的文字，可只批注所选部分）</span>}
+      </div>
+      {notice && <div className="drw-anchor-notice" role="status">{notice}</div>}
+    </>
+  )
+}
+
+function ReviewComposer({ nodeTitle, replyTo, onCancelReply, anchor, anchorNotice, onClearAnchor, canAnnotate, canRevise, busy, onAnnotate, onRevise }: {
   nodeTitle: string | undefined
   replyTo: ReviewAnnotation | null
   onCancelReply: () => void
+  anchor: TextAnchor | null
+  anchorNotice: string
+  onClearAnchor: () => void
   canAnnotate: boolean
   canRevise: boolean
   busy: boolean
@@ -681,6 +754,7 @@ function ReviewComposer({ nodeTitle, replyTo, onCancelReply, canAnnotate, canRev
               <button type="button" className="drw-link" onClick={onCancelReply}>取消回复</button>
             </div>
           )}
+          <AnnotationScope anchor={anchor} notice={anchorNotice} replying={!!replyTo} onClear={onClearAnchor} />
           <textarea className="ui-input drw-textarea" aria-label="批注内容" value={text} onChange={e => setText(e.target.value)} placeholder="写下批注…" />
         </>
       ) : (
@@ -723,6 +797,8 @@ function ScopedWorkspace({ projectId, docId, docTitle, onBack, identity }: Works
   const [profileKeyChoice, setProfileKeyChoice] = useState<string | null>(null)
   const [submissionChoice, setSubmissionChoice] = useState<string | null>(null)
   const [replyTo, setReplyTo] = useState<ReviewAnnotation | null>(null)
+  // 阅读视图选区记录的批注范围或无效说明；只对记录时的那个节点生效。
+  const [textPick, setTextPick] = useState<{ nodeId: string; anchor: TextAnchor | null; notice: string } | null>(null)
   const [receipt, setReceipt] = useState<Record<string, any> | null>(null)
 
   const sections = useGuardedResource(`${scope}:tree`, identity, live => loadDocTree(projectId, docId, live))
@@ -834,10 +910,33 @@ function ScopedWorkspace({ projectId, docId, docTitle, onBack, identity }: Works
   const selectedNode = tree && selectedId ? tree.nodes[selectedId] : undefined
   const reviewTarget = reviewTargetNode(tree, selectedId)
   const reviewDone = () => { review.reload(); trace.reload() }
+  const pick = textPick && reviewTarget && textPick.nodeId === reviewTarget.id ? textPick : null
+  const acceptTextSelection = (selection: TextSelection) => {
+    switch (selection.kind) {
+      case 'none':
+        setTextPick(null)
+        return
+      case 'range':
+        selectNode(selection.anchor.nodeId)
+        setReplyTo(null)
+        setTextPick({ nodeId: selection.anchor.nodeId, anchor: selection.anchor, notice: '' })
+        return
+      case 'multi-node':
+      case 'outside-text':
+        setTextPick(reviewTarget ? { nodeId: reviewTarget.id, anchor: null, notice: selection.notice } : null)
+        return
+      default: {
+        const unknown: never = selection
+        return unknown
+      }
+    }
+  }
   const annotate = (text: string, reply?: string) => {
     if (!submissionId || !reviewTarget) return
+    const range = reply ? null : pick?.anchor ?? null
     reviewOp.run('annotate', operationId => api.rdmCommand('rdm.render.review.annotate',
-      annotatePayload({ projectId, submissionId, treeNodeId: reviewTarget.id, text, operationId, replyTo: reply })), () => { setReplyTo(null); reviewDone() })
+      annotatePayload({ projectId, submissionId, treeNodeId: reviewTarget.id, text, operationId, replyTo: reply, range })),
+    () => { setReplyTo(null); setTextPick(null); reviewDone() })
   }
   const revise = (kind: 'insert' | 'delete' | 'replace', before?: string, after?: string) => {
     if (!submissionId || !reviewTarget) return
@@ -903,7 +1002,8 @@ function ScopedWorkspace({ projectId, docId, docTitle, onBack, identity }: Works
               {order.length <= 1 && tree.order.length > 1 && <div className="empty-note">没有符合过滤条件的节点</div>}
               {view === 'canvas'
                 ? <StructureCanvas tree={tree} order={order} visible={visible} selectedId={selectedId} onSelect={selectNode} badges={badges} facts={facts} revealSeq={revealSeq} />
-                : <ReaderView tree={tree} order={order} visible={visible} selectedId={selectedId} onSelect={selectNode} badges={badges} facts={facts} revealSeq={revealSeq} />}
+                : <ReaderView tree={tree} order={order} visible={visible} selectedId={selectedId} onSelect={selectNode} badges={badges} facts={facts} revealSeq={revealSeq}
+                  onTextSelect={caps.review && caps.annotate && submissionId ? acceptTextSelection : undefined} />}
               {selectedNode && (
                 <div className="drw-selected">
                   <SectionLabel>当前节点</SectionLabel>
@@ -992,6 +1092,7 @@ function ScopedWorkspace({ projectId, docId, docTitle, onBack, identity }: Works
                       )}
                       {(caps.annotate || caps.revise) && (
                         <ReviewComposer nodeTitle={reviewTarget?.title} replyTo={replyTo} onCancelReply={() => setReplyTo(null)}
+                          anchor={pick?.anchor ?? null} anchorNotice={pick?.notice ?? ''} onClearAnchor={() => setTextPick(null)}
                           canAnnotate={caps.annotate} canRevise={caps.revise} busy={reviewOp.state.status === 'running'}
                           onAnnotate={annotate} onRevise={revise} />
                       )}
diff --git a/src/documentRenderPresentation.ts b/src/documentRenderPresentation.ts
index 70641ed..f661aee 100644
--- a/src/documentRenderPresentation.ts
+++ b/src/documentRenderPresentation.ts
@@ -104,10 +104,28 @@ const REFUSAL_MESSAGES: { code: string; message: string }[] = [
   { code: 'project source preflight', message: '审签来源尚未通过校验（来源消息已记录），请稍后重试；审签未生效' },
 ]
 
+/** rdm.render.review.annotate 的范围校验失败（消息以 review_anchor_invalid: 开头；成对缺失另有固定文案）。 */
+const ANCHOR_FAILURES: { match: RegExp; message: string }[] = [
+  { match: /has no frozen text a range can anchor/, message: '该节点没有可按范围批注的正文（如章节容器、图片或空字段），请改为批注整个节点' },
+  { match: /quote does not match/, message: '所选文字与提交审阅时冻结的正文不一致，请改为批注整个节点或重新选择' },
+  { match: /quote occurs more than once/, message: '所选文字在该节点中出现多次，无法唯一定位，请重新选择' },
+  { match: /quote is not in the frozen text/, message: '所选文字不在该节点冻结的正文中，请改为批注整个节点或重新选择' },
+  { match: /out of range/, message: '所选范围超出该节点冻结正文的长度，请改为批注整个节点或重新选择' },
+  { match: /reply must address the parent/, message: '回复只能针对原批注所在的节点，回复沿用原批注的范围' },
+]
+
+function anchorFailureMessage(raw: string): string | undefined {
+  if (raw.includes('textStart and textEnd must be supplied together')) return '批注范围不完整（起止位置须成对提供），请重新选择文字'
+  if (!raw.includes('review_anchor_invalid:')) return undefined
+  return ANCHOR_FAILURES.find(f => f.match.test(raw))?.message ?? '批注范围无效，请重新选择文字或改为批注整个节点'
+}
+
 export function describeRenderFailure(err: unknown): RenderFailureView {
   const raw = err instanceof Error ? err.message : String(err ?? '')
   if (/^40[13]:/.test(raw)) return { message: '登录已失效，请重新登录后再操作', raw }
   if (/unknown or disabled command|commands disabled/.test(raw)) return { message: '当前服务未提供文档渲染能力', raw }
+  const anchor = anchorFailureMessage(raw)
+  if (anchor) return { message: anchor, raw }
   const refusal = REFUSAL_MESSAGES.find(r => raw.includes(r.code))
   if (refusal) return { message: refusal.message, raw }
   const m = raw.match(/^\d{3}:\s*([\s\S]*)$/)
@@ -776,7 +794,13 @@ export interface ReviewReply {
   resolved: boolean
   orphaned: boolean
 }
-export interface ReviewAnnotation extends ReviewReply { replies: ReviewReply[] }
+export interface ReviewAnnotation extends ReviewReply {
+  replies: ReviewReply[]
+  /** 服务端按冻结文本截取的批注范围摘录。 */
+  quote?: string
+  /** 节点仍在但范围或哈希不再匹配冻结文本：显示旧摘录，不自动迁移。 */
+  needsReanchor?: true
+}
 
 type RevisionKind = 'insert' | 'delete' | 'replace'
 export interface ReviewRevision {
@@ -819,8 +843,10 @@ export function normalizeReviewView(raw: unknown): ReviewView {
   for (const item of arr(r?.annotations)) {
     const base = reply(item)
     if (!base) continue
-    const replies = arr(obj(item)?.replies).map(reply).filter((x): x is ReviewReply => !!x)
-    annotations.push({ ...base, replies })
+    const a = obj(item)
+    const replies = arr(a?.replies).map(reply).filter((x): x is ReviewReply => !!x)
+    const quote = displayText(a?.quote, 1000)
+    annotations.push({ ...base, replies, ...(quote ? { quote } : {}), ...(a?.needsReanchor === true ? { needsReanchor: true as const } : {}) })
   }
   const revisions: ReviewRevision[] = []
   for (const item of arr(r?.revisions)) {
@@ -887,9 +913,56 @@ export function reviewTargetNode(tree: DocTree | null, selectedId: string | null
 /** RDM 的 nodeId 参数接受规范节点或工作区树节点；从树上审阅一律发送所选树节点 id（dn-/sec-/legacy-）。 */
 interface ReviewTarget { projectId: string; submissionId: string; treeNodeId: string; operationId: string }
 
-export function annotatePayload(input: ReviewTarget & { text: string; replyTo?: string }): Record<string, unknown> {
-  const { projectId, submissionId, treeNodeId, operationId } = input
-  return { projectId, submissionId, nodeId: treeNodeId, text: input.text.trim(), operationId, ...(input.replyTo ? { replyTo: input.replyTo } : {}) }
+/**
+ * 批注范围只随根批注、且只在范围属于目标节点时发送：回复继承父批注锚点，RDM 拒绝回复带范围；
+ * textHash 由 RDM 从冻结节点全文计算，载荷绝不含 textHash/range。
+ */
+export function annotatePayload(input: ReviewTarget & { text: string; replyTo?: string; range?: TextAnchor | null }): Record<string, unknown> {
+  const { projectId, submissionId, treeNodeId, operationId, replyTo, range } = input
+  const anchor = !replyTo && range && range.nodeId === treeNodeId
+    ? { textStart: range.textStart, textEnd: range.textEnd, quote: range.quote }
+    : {}
+  return { projectId, submissionId, nodeId: treeNodeId, text: input.text.trim(), operationId, ...(replyTo ? { replyTo } : {}), ...anchor }
+}
+
+// ---- 批注范围（06 §2：nodeId + textStart + textEnd + textHash） ----
+
+/** 码点半开区间（JS Array.from 下标，即 RDM 的 rune 偏移）与区间原文。 */
+export interface TextAnchor { nodeId: string; textStart: number; textEnd: number; quote: string }
+
+const isHighSurrogate = (c: number) => c >= 0xd800 && c <= 0xdbff
+const isLowSurrogate = (c: number) => c >= 0xdc00 && c <= 0xdfff
+const splitsPair = (text: string, i: number) =>
+  i > 0 && i < text.length && isHighSurrogate(text.charCodeAt(i - 1)) && isLowSurrogate(text.charCodeAt(i))
+
+/** UTF-16 选区 → 码点范围：落在代理对中间的端点外扩成完整字符，首尾空白不计入；无内容返回 undefined。 */
+export function codePointRange(text: string, utf16Start: number, utf16End: number): Omit<TextAnchor, 'nodeId'> | undefined {
+  let start = Math.max(0, Math.min(utf16Start, utf16End))
+  let end = Math.min(text.length, Math.max(utf16Start, utf16End))
+  if (splitsPair(text, start)) start--
+  if (splitsPair(text, end)) end++
+  while (start < end && /\s/.test(text[start])) start++
+  while (end > start && /\s/.test(text[end - 1])) end--
+  if (start >= end) return undefined
+  const quote = text.slice(start, end)
+  const textStart = Array.from(text.slice(0, start)).length
+  return { textStart, textEnd: textStart + Array.from(quote).length, quote }
+}
+
+/** 选区与某个节点正文元素的交集（UTF-16 偏移，已裁到该元素文本内）。 */
+export interface SelectionHit { nodeId: string; text: string; start: number; end: number }
+
+/** 阅读视图选区判定：null 为无选区或折叠；只落在一个节点正文内才记录范围，其余给出说明且不记录范围。 */
+export function selectionAnchor(hits: SelectionHit[] | null):
+  | { kind: 'none' }
+  | { kind: 'range'; anchor: TextAnchor }
+  | { kind: 'multi-node' | 'outside-text'; notice: string } {
+  if (hits === null) return { kind: 'none' }
+  const touched = hits.filter(h => h.end > h.start)
+  if (touched.length > 1) return { kind: 'multi-node', notice: '所选文字跨越多个节点，范围批注只能选在一个节点的正文内；未记录范围，提交将批注整个节点' }
+  const range = touched.length === 1 ? codePointRange(touched[0].text, touched[0].start, touched[0].end) : undefined
+  if (!range) return { kind: 'outside-text', notice: '所选内容不在节点正文内；未记录范围，提交将批注整个节点' }
+  return { kind: 'range', anchor: { nodeId: touched[0].nodeId, ...range } }
 }
 
 export function revisePayload(input: ReviewTarget & { kind: RevisionKind; before?: string; after?: string }): Record<string, unknown> {
diff --git a/src/styles.css b/src/styles.css
index 1c38468..4961fc8 100644
--- a/src/styles.css
+++ b/src/styles.css
@@ -678,6 +678,7 @@ h2.drw-reader-heading { font-size: var(--fs-ui-xl); }
 h3.drw-reader-heading { font-size: var(--fs-ui-lg); }
 h4.drw-reader-heading, h5.drw-reader-heading { font-size: var(--fs-ui-base); }
 .drw-reader-title { background: none; border: none; padding: 0; color: inherit; font: inherit; text-align: left; cursor: pointer; border-radius: var(--radius-xs); overflow-wrap: anywhere; }
+.drw-reader-title[data-anchor-node] { cursor: text; }
 .drw-anchor { color: var(--text-faint); font-size: var(--fs-ui-sm); text-decoration: none; }
 .drw-anchor:hover { color: var(--accent-text); }
 .drw-badges { display: inline-flex; gap: 4px; flex: none; }
@@ -747,6 +748,9 @@ h4.drw-reader-heading, h5.drw-reader-heading { font-size: var(--fs-ui-base); }
 .drw-anno-text { color: var(--text); white-space: pre-wrap; overflow-wrap: anywhere; }
 .drw-anno-replies { margin-top: 6px; padding-left: 12px; border-left: 2px solid var(--border-soft); display: flex; flex-direction: column; gap: 6px; }
 .drw-anno-orphan-note { font-size: var(--fs-ui-sm); color: var(--text-dim); margin-bottom: 4px; }
+.drw-anno.needs-reanchor { border-color: var(--warn); }
+.drw-anno-quote { margin: 2px 0 4px; padding: 0 8px; border-left: 2px solid var(--border-strong); color: var(--text-dim); white-space: pre-wrap; overflow-wrap: anywhere; display: -webkit-box; -webkit-line-clamp: 3; -webkit-box-orient: vertical; overflow: hidden; }
+.drw-anno-reanchor { margin-bottom: 4px; font-size: var(--fs-ui-sm); color: var(--warn-text); }
 .drw-rev .drw-diff-del, .drw-rev .drw-diff-add { margin-top: 4px; }
 .drw-traces { display: flex; flex-direction: column; gap: 6px; }
 .drw-trace { display: flex; flex-wrap: wrap; align-items: center; gap: 4px 8px; padding: 6px 8px; border-left: 2px solid var(--border); font-size: var(--fs-ui-sm); }
@@ -768,6 +772,9 @@ h4.drw-reader-heading, h5.drw-reader-heading { font-size: var(--fs-ui-base); }
 .drw-composer-head { display: flex; align-items: center; gap: 6px; flex-wrap: wrap; font-size: var(--fs-ui-sm); }
 .drw-composer-node { flex: 1; min-width: 0; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; color: var(--text); }
 .drw-composer-reply { display: flex; gap: 8px; align-items: center; font-size: var(--fs-ui-sm); color: var(--text-dim); }
+.drw-composer-scope { display: flex; gap: 6px; align-items: baseline; flex-wrap: wrap; font-size: var(--fs-ui-sm); }
+.drw-composer-quote { min-width: 0; color: var(--text); overflow-wrap: anywhere; }
+.drw-anchor-notice { font-size: var(--fs-ui-sm); color: var(--warn-text); }
 .drw-textarea { min-height: 64px; resize: vertical; font-size: var(--fs-ui-sm); }
 .drw-inline-err { font-size: var(--fs-ui-sm); color: var(--err-text); }
 .drw-link { padding: 0; background: none; border: none; color: var(--accent-text); font-size: var(--fs-ui-sm); cursor: pointer; }
diff --git a/test/review-annotation-anchor.test.ts b/test/review-annotation-anchor.test.ts
new file mode 100644
index 0000000..8cd0692
--- /dev/null
+++ b/test/review-annotation-anchor.test.ts
@@ -0,0 +1,167 @@
+// 批注范围锚定（06 §2：nodeId + textStart + textEnd + textHash；10 §5「批注范围准确」）。
+// RDM 契约：偏移是冻结节点文本上的 Unicode 码点（Go rune = JS Array.from 下标）半开区间；
+// quote 与范围同发时须等于范围原文；回复不带范围；textHash/range 永不由前端发送。
+import { describe, expect, it } from 'vitest'
+import { createElement } from 'react'
+import { renderToStaticMarkup } from 'react-dom/server'
+import {
+  annotatePayload, codePointRange, describeRenderFailure, normalizeReviewView, partitionAnnotations, selectionAnchor,
+} from '../src/documentRenderPresentation'
+import { AnnotationGroups, AnnotationScope } from '../src/components/DocumentRenderWorkspace'
+
+describe('码点偏移（UTF-16 选区 → RDM rune 偏移）', () => {
+  it('ASCII：半开区间，参数顺序无关，越界裁剪', () => {
+    expect(codePointRange('Hello world', 6, 11)).toEqual({ textStart: 6, textEnd: 11, quote: 'world' })
+    expect(codePointRange('Hello world', 11, 6)).toEqual({ textStart: 6, textEnd: 11, quote: 'world' })
+    expect(codePointRange('Hello world', 6, 99)).toEqual({ textStart: 6, textEnd: 11, quote: 'world' })
+  })
+  it('首尾空白不计入，纯空白或空选区不记录范围', () => {
+    expect(codePointRange('Hello world', 5, 11)).toEqual({ textStart: 6, textEnd: 11, quote: 'world' })
+    expect(codePointRange('Hello world', 5, 6)).toBeUndefined()
+    expect(codePointRange('Hello world', 3, 3)).toBeUndefined()
+  })
+  it('CJK：与契约示例一致（"审阅正文 Review" 中 Review 为 5..11）', () => {
+    expect(codePointRange('审阅正文 Review', 5, 11)).toEqual({ textStart: 5, textEnd: 11, quote: 'Review' })
+    expect(codePointRange('项目内容、目标及意义', 5, 7)).toEqual({ textStart: 5, textEnd: 7, quote: '目标' })
+  })
+  it('emoji 代理对：UTF-16 下标换算为码点，后续字符不错位', () => {
+    const text = '审阅👍正文 Review'
+    expect(text.indexOf('Review')).toBe(7)
+    expect(codePointRange(text, 7, 13)).toEqual({ textStart: 6, textEnd: 12, quote: 'Review' })
+    expect(Array.from(text).slice(6, 12).join('')).toBe('Review')
+    expect(codePointRange(text, 2, 4)).toEqual({ textStart: 2, textEnd: 3, quote: '👍' })
+  })
+  it('端点落在代理对中间时外扩为完整字符，绝不发出半个字符', () => {
+    const text = '审阅👍正文'
+    expect(codePointRange(text, 3, 5)).toEqual({ textStart: 2, textEnd: 4, quote: '👍正' })
+    expect(codePointRange(text, 0, 3)).toEqual({ textStart: 0, textEnd: 3, quote: '审阅👍' })
+  })
+  it('ZWJ 组合 emoji 按码点（rune）计数而非字形', () => {
+    const family = '👨\u200d👩\u200d👧'
+    const text = `a${family}b`
+    expect(codePointRange(text, 1, 1 + family.length)).toEqual({ textStart: 1, textEnd: 6, quote: family })
+  })
+})
+
+describe('阅读视图选区判定', () => {
+  const hit = (nodeId: string, text: string, start: number, end: number) => ({ nodeId, text, start, end })
+  it('无选区或折叠：不记录', () => {
+    expect(selectionAnchor(null)).toEqual({ kind: 'none' })
+  })
+  it('落在单个节点正文内：记录该节点的码点范围', () => {
+    expect(selectionAnchor([hit('dn-head', '项目内容、目标及意义', 5, 7)]))
+      .toEqual({ kind: 'range', anchor: { nodeId: 'dn-head', textStart: 5, textEnd: 7, quote: '目标' } })
+  })
+  it('只擦到下一节点起点（零长度交集）仍算单节点', () => {
+    expect(selectionAnchor([hit('a', 'Alpha', 0, 5), hit('b', 'Beta', 0, 0)]))
+      .toEqual({ kind: 'range', anchor: { nodeId: 'a', textStart: 0, textEnd: 5, quote: 'Alpha' } })
+  })
+  it('跨越多个节点：说明原因，不记录范围（提交批注整个节点）', () => {
+    const r = selectionAnchor([hit('a', 'Alpha', 2, 5), hit('b', 'Beta', 0, 2)])
+    expect(r.kind).toBe('multi-node')
+    expect(r.kind === 'multi-node' && r.notice).toContain('跨越多个节点')
+    expect(r.kind === 'multi-node' && r.notice).toContain('批注整个节点')
+  })
+  it('选区不含任何节点正文（或只有空白）：说明原因，不记录范围', () => {
+    expect(selectionAnchor([]).kind).toBe('outside-text')
+    expect(selectionAnchor([hit('a', 'A b', 1, 2)]).kind).toBe('outside-text')
+  })
+})
+
+describe('rdm.render.review.annotate 载荷', () => {
+  const base = { projectId: 'p', submissionId: 'sub', treeNodeId: 'dn-head', text: ' 批 ', operationId: 'op' }
+  const range = { nodeId: 'dn-head', textStart: 5, textEnd: 7, quote: '目标' }
+  it('有选区：发送 textStart/textEnd/quote，绝不发送 textHash 或 range', () => {
+    const p = annotatePayload({ ...base, range })
+    expect(p).toEqual({ projectId: 'p', submissionId: 'sub', nodeId: 'dn-head', text: '批', operationId: 'op', textStart: 5, textEnd: 7, quote: '目标' })
+    expect(p).not.toHaveProperty('textHash')
+    expect(p).not.toHaveProperty('range')
+  })
+  it('无选区：整节点批注，不带任何范围参数', () => {
+    for (const p of [annotatePayload(base), annotatePayload({ ...base, range: null })]) {
+      expect(p).toEqual({ projectId: 'p', submissionId: 'sub', nodeId: 'dn-head', text: '批', operationId: 'op' })
+    }
+  })
+  it('回复：即使持有选区也不带范围（继承父批注锚点）', () => {
+    const p = annotatePayload({ ...base, replyTo: 'a1', range })
+    expect(p).toEqual({ projectId: 'p', submissionId: 'sub', nodeId: 'dn-head', text: '批', operationId: 'op', replyTo: 'a1' })
+    for (const k of ['textStart', 'textEnd', 'quote', 'textHash', 'range']) expect(p).not.toHaveProperty(k)
+  })
+  it('范围不属于目标节点时不发送（绝不把 A 节点的偏移挂到 B 节点）', () => {
+    expect(annotatePayload({ ...base, range: { ...range, nodeId: 'dn-other' } })).not.toHaveProperty('textStart')
+  })
+})
+
+describe('审阅视图：摘录与需重新锚定', () => {
+  const person = { id: 'u1', displayName: '审核人' }
+  const view = normalizeReviewView({
+    annotations: [
+      { id: 'a1', nodeId: 'pp.goal', treeNodeId: 'dn-head', author: person, createdAt: '', text: '精确锚定', quote: '目标', needsReanchor: false,
+        range: { start: 5, end: 7, textHash: 'h' }, replies: [{ id: 'r1', nodeId: 'pp.goal', treeNodeId: 'dn-head', author: person, createdAt: '', text: '回复', quote: '目标' }] },
+      { id: 'a2', nodeId: 'pp.goal', treeNodeId: 'dn-head', author: person, createdAt: '', text: '漂移了', quote: '旧目标', needsReanchor: true, replies: [] },
+      { id: 'a3', nodeId: 'pp.sig', treeNodeId: 'dn-head', author: person, createdAt: '', text: '节点级', replies: [] },
+    ],
+  })
+  it('归一化保留 quote 与 needsReanchor；缺省不补造', () => {
+    expect(view.annotations[0]).toMatchObject({ quote: '目标' })
+    expect(view.annotations[0]).not.toHaveProperty('needsReanchor')
+    expect(view.annotations[1]).toMatchObject({ quote: '旧目标', needsReanchor: true })
+    expect(view.annotations[2]).not.toHaveProperty('quote')
+  })
+  it('批注项显示摘录；需重新锚定时有可见状态与说明', () => {
+    const { byNode, orphaned } = partitionAnnotations(view.annotations, new Set(['dn-head']))
+    const html = renderToStaticMarkup(createElement(AnnotationGroups, { byNode, orphaned, nodeTitle: () => '项目内容、目标及意义', onSelectNode: () => {} }))
+    expect(html).toContain('<blockquote class="drw-anno-quote" title="目标">目标</blockquote>')
+    expect(html).toContain('<blockquote class="drw-anno-quote" title="旧目标">旧目标</blockquote>')
+    expect(html.match(/需重新锚定/g)).toHaveLength(1)
+    expect(html).toContain('drw-anno needs-reanchor')
+    expect(html).toContain('上方为旧摘录')
+    expect(html.match(/drw-anno-quote/g)).toHaveLength(2)
+  })
+})
+
+describe('撰写区的批注范围', () => {
+  const render = (props: Partial<Parameters<typeof AnnotationScope>[0]>) =>
+    renderToStaticMarkup(createElement(AnnotationScope, { anchor: null, notice: '', replying: false, onClear: () => {}, ...props }))
+  it('有选区：显示摘录、码点位置与改为整个节点', () => {
+    const html = render({ anchor: { nodeId: 'dn-head', textStart: 5, textEnd: 7, quote: '目标' } })
+    expect(html).toContain('「目标」')
+    expect(html).toContain('第 6–7 字')
+    expect(html).toContain('改为整个节点')
+  })
+  it('无选区：明示整个节点', () => {
+    expect(render({})).toContain('整个节点（在阅读视图中选中该节点的文字')
+  })
+  it('选区无效：显示说明', () => {
+    expect(render({ notice: '所选文字跨越多个节点' })).toContain('role="status">所选文字跨越多个节点')
+  })
+  it('回复：沿用原批注范围，不显示选区', () => {
+    const html = render({ replying: true, anchor: { nodeId: 'dn-head', textStart: 5, textEnd: 7, quote: '目标' } })
+    expect(html).toContain('回复沿用原批注的范围')
+    expect(html).not.toContain('目标')
+  })
+})
+
+describe('review_anchor_invalid: 转为中文可读文案（原始回执保留）', () => {
+  const cases: [string, string][] = [
+    ['review_anchor_invalid: node pp.sig (image) has no frozen text a range can anchor; address a paragraph, heading, list item or table cell', '没有可按范围批注的正文'],
+    ['review_anchor_invalid: quote does not match the frozen text of node pp.goal at 5..7', '与提交审阅时冻结的正文不一致'],
+    ['review_anchor_invalid: quote occurs more than once in node pp.goal; supply textStart and textEnd', '出现多次'],
+    ['review_anchor_invalid: quote is not in the frozen text of node pp.goal', '不在该节点冻结的正文中'],
+    ['review_anchor_invalid: textStart/textEnd 5..99 out of range for node pp.goal (10 characters)', '超出该节点冻结正文的长度'],
+    ['review_anchor_invalid: reply must address the parent\'s node pp.goal; replies inherit the parent\'s anchor', '回复只能针对原批注所在的节点'],
+    ['textStart and textEnd must be supplied together', '起止位置须成对提供'],
+    ['review_anchor_invalid: something new', '批注范围无效'],
+  ]
+  it.each(cases)('%s', (msg, expected) => {
+    for (const raw of [msg, `400: ${JSON.stringify({ error: msg })}`]) {
+      const f = describeRenderFailure(new Error(raw))
+      expect(f.message).toContain(expected)
+      expect(f.message).not.toContain('review_anchor_invalid')
+      expect(f.raw).toBe(raw)
+    }
+  })
+  it('非范围错误不受影响', () => {
+    expect(describeRenderFailure(new Error('当前编制人不是你')).message).toBe('当前编制人不是你')
+  })
+})