diff --git a/src/components/SidebarPanel.tsx b/src/components/SidebarPanel.tsx
index 0183b73..c415df2 100644
--- a/src/components/SidebarPanel.tsx
+++ b/src/components/SidebarPanel.tsx
@@ -12,6 +12,7 @@ import { detectPickerField } from "~lib/pickerDetector"
 import { detectAndUploadResume } from "~lib/resumeUpload"
 import { getMockResumeData } from "~lib/constants"
 import { getResumeFieldValue } from "~lib/resumeDataHelper"
+import { locateExperienceSections, expandExperienceSections } from "~lib/experienceSection"
 import type { MatchedFormField, ResumeData } from "~lib/types"
 import "./SidebarPanel.scss"
 
@@ -63,18 +64,17 @@ export function SidebarPanel({ onClose }: SidebarPanelProps) {
         setResumeData(currentResumeData)
         console.log(`===== OfferPie: 已加载简历数据，教育${currentResumeData.education.length}段 工作${currentResumeData.work.length}段 实习${currentResumeData.internship.length}段 项目${currentResumeData.project.length}段 竞赛${currentResumeData.competition.length}段 =====`)
 
-        // 4.1 检测并上传简历文件
-        const resumeUrl = "https://offerpie.oss-cn-guangzhou.aliyuncs.com/%E4%BA%8E%E5%A4%A7%E6%98%A5.pdf"
-        const uploaded = await detectAndUploadResume(resumeUrl)
-        console.log(`===== OfferPie: 简历上传 ${uploaded ? "成功" : "跳过（未找到上传按钮或失败）"} =====`)
-        if (uploaded) await delay(1000) // 等待网站解析简历
+        // // 4.1 检测并上传简历文件
+        // const resumeUrl = "https://offerpie.oss-cn-guangzhou.aliyuncs.com/%E4%BA%8E%E5%A4%A7%E6%98%A5.pdf"
+        // const uploaded = await detectAndUploadResume(resumeUrl)
+        // console.log(`===== OfferPie: 简历上传 ${uploaded ? "成功" : "跳过（未找到上传按钮或失败）"} =====`)
+        // if (uploaded) await delay(1000) // 等待网站解析简历
 
-        // 4.5 查找教育背景（教育经历）、实习经历、工作经历、项目经历、竞赛经历位置和添加按钮，根据要填的简历数据添加相应的经历条数
+        // 4.5 定位经历区块并统计已展开段数
+        const sectionResults = locateExperienceSections(document.body, lang)
+        // 4.6 对比简历数据段数，点击添加按钮补足不够的段数
+        const expandedResults = await expandExperienceSections(sectionResults, currentResumeData, lang)
         // TODO: 后续实现步骤：
-        //   1. 遍历 EXPERIENCE_SECTION_CONFIGS，在 DOM 中查找每种经历的区块标题元素
-        //   2. 对比简历数据中该经历的段数 vs 页面已展开的段数
-        //   3. 如果简历数据段数 > 页面已展开段数，查找并点击"添加"按钮补足差额
-        //   4. 每次点击添加按钮后等待 DOM 更新，重新计数确认
         //   5. 对5种经历的标签关系数据做特殊标记（后续完善）
         //   6. 所有经历段数添加完毕后，再进入统一的字段匹配和填写流程
 
@@ -151,7 +151,7 @@ export function SidebarPanel({ onClose }: SidebarPanelProps) {
     <div className="op-container">
       {/* 顶部操作栏：反馈、设置、关闭按钮 */}
       <div className="op-header">
-        <span className="op-header-link">反馈3</span>
+        <span className="op-header-link">反馈5</span>
         <span className="op-header-link">设置</span>
         {/* 关闭按钮：点击后隐藏侧边栏 */}
         <button className="op-close-btn" onClick={onClose}>
diff --git a/src/lib/constants.ts b/src/lib/constants.ts
index 77e85b4..aa63435 100644
--- a/src/lib/constants.ts
+++ b/src/lib/constants.ts
@@ -224,7 +224,7 @@ export const EXPERIENCE_SECTION_CONFIGS: ExperienceSectionConfig[] = [
     zh: ["教育背景", "教育经历", "学历信息", "教育信息"],
     en: ["Education", "Education Background", "Academic Background", "Education History"],
     coreFieldKey: "school",
-    addButtonZh: ["添加", "新增", "添加教育", "添加教育经历", "新增教育经历", "+ 添加"],
+    addButtonZh: ["添加", "新增", "添加教育", "添加教育经历", "新增教育经历", "+ 添加", "+ 新增"],
     addButtonEn: ["Add", "Add Education", "Add More", "+ Add"],
   },
   {
@@ -232,7 +232,7 @@ export const EXPERIENCE_SECTION_CONFIGS: ExperienceSectionConfig[] = [
     zh: ["工作经历", "工作经验", "工作信息"],
     en: ["Work Experience", "Employment History", "Work History", "Professional Experience"],
     coreFieldKey: "workCompany",
-    addButtonZh: ["添加", "新增", "添加工作", "添加工作经历", "新增工作经历", "+ 添加"],
+    addButtonZh: ["添加", "新增", "添加工作", "添加工作经历", "新增工作经历", "+ 添加", "+ 新增"],
     addButtonEn: ["Add", "Add Work", "Add Experience", "Add More", "+ Add"],
   },
   {
@@ -240,7 +240,7 @@ export const EXPERIENCE_SECTION_CONFIGS: ExperienceSectionConfig[] = [
     zh: ["实习经历", "实习经验", "实习信息"],
     en: ["Internship", "Internship Experience", "Intern Experience"],
     coreFieldKey: "internCompany",
-    addButtonZh: ["添加", "新增", "添加实习", "添加实习经历", "新增实习经历", "+ 添加"],
+    addButtonZh: ["添加", "新增", "添加实习", "添加实习经历", "新增实习经历", "+ 添加", "+ 新增"],
     addButtonEn: ["Add", "Add Internship", "Add More", "+ Add"],
   },
   {
@@ -248,7 +248,7 @@ export const EXPERIENCE_SECTION_CONFIGS: ExperienceSectionConfig[] = [
     zh: ["项目经历", "项目经验", "项目信息"],
     en: ["Project", "Project Experience", "Projects"],
     coreFieldKey: "projectName",
-    addButtonZh: ["添加", "新增", "添加项目", "添加项目经历", "新增项目经历", "+ 添加"],
+    addButtonZh: ["添加", "新增", "添加项目", "添加项目经历", "新增项目经历", "+ 添加", "+ 新增"],
     addButtonEn: ["Add", "Add Project", "Add More", "+ Add"],
   },
   {
@@ -256,7 +256,7 @@ export const EXPERIENCE_SECTION_CONFIGS: ExperienceSectionConfig[] = [
     zh: ["竞赛经历", "获奖经历", "竞赛信息", "获奖情况"],
     en: ["Competition", "Awards", "Competitions & Awards", "Contest Experience"],
     coreFieldKey: "competitionName",
-    addButtonZh: ["添加", "新增", "添加竞赛", "添加竞赛经历", "新增竞赛经历", "+ 添加"],
+    addButtonZh: ["添加", "新增", "添加竞赛", "添加竞赛经历", "新增竞赛经历", "+ 添加", "+ 新增"],
     addButtonEn: ["Add", "Add Competition", "Add Award", "Add More", "+ Add"],
   },
 ]
@@ -310,6 +310,21 @@ export function getMockResumeData(): ResumeData {
           { type: "text", content: "熟练使用Office办公软件（Word、Excel、PPT）进行数据整理、报告撰写与汇报展示，注重细节与准确性" },
         ],
       },
+        {
+            id: "AntTOPmj",
+            school: "华南师范大学2",
+            major: "人工智能",
+            degree: "本科",
+            studyType: "统招",
+            startDate: "2021.09",
+            endDate: "2025.07",
+            description: [
+                { type: "text", content: "大一：高等数学、Python程序设计、面向对象程序设计、计算机体系结构、线性代数、离散数学等，培养严谨的逻辑思维能力" },
+                { type: "text", content: "大二：Java、软件工程导论、概率论与数理统计、数据结构与算法、Web开发、数据库原理、操作系统等，具备数据管理与分析基础" },
+                { type: "text", content: "大三：人工智能基础、计算机网络、计算机语言等，掌握数据挖掘与模式识别方法" },
+                { type: "text", content: "熟练使用Office办公软件（Word、Excel、PPT）进行数据整理、报告撰写与汇报展示，注重细节与准确性" },
+            ],
+        },
     ],
     work: [],
     internship: [
@@ -337,6 +352,30 @@ export function getMockResumeData(): ResumeData {
           { type: "text", content: "熟练掌握Office办公软件及数据库工具，具备文献检索与信息整理经验，工作态度认真负责。" },
         ],
       },
+        {
+            id: "EoNkjAF2",
+            companyName: "深圳乐动机器人科技有限公司2",
+            position: "机器人感知算法工程师",
+            startDate: "2024.05",
+            endDate: "2024.08",
+            description: [
+                { type: "text", content: "负责数据收集、分析、模型训练与测试、算法部署等全流程工作，注重数据准确性与细节管理；" },
+                { type: "text", content: "参与割草机算法研发工作，包括分类、检测、分割、跟踪等模块，具备快速学习新技术领域的能力；" },
+                { type: "text", content: "撰写技术文档与测试报告，进行跨部门沟通协作，确保项目按时交付并符合质量标准。" },
+            ],
+        },
+        {
+            id: "cX5EGRDA",
+            companyName: "江西卓云深圳研发中心2",
+            position: "图像算法工程师",
+            startDate: "2023.12",
+            endDate: "2024.02",
+            description: [
+                { type: "text", content: "运用Python进行数据处理与分析，开发部署应用程序，具备较强的逻辑分析和数据整理能力；" },
+                { type: "text", content: "独立完成项目全生命周期管理，包括数据收集、标注、模型训练、部署及性能调优，能应对重复性工作并保证准确性；" },
+                { type: "text", content: "熟练掌握Office办公软件及数据库工具，具备文献检索与信息整理经验，工作态度认真负责。" },
+            ],
+        },
     ],
     project: [
       {
diff --git a/src/lib/experienceSection.ts b/src/lib/experienceSection.ts
new file mode 100644
index 0000000..6fbdf3e
--- /dev/null
+++ b/src/lib/experienceSection.ts
@@ -0,0 +1,652 @@
+/**
+ * 经历区块识别、段数统计与添加按钮点击模块
+ *
+ * 整体流程：
+ *   1. 定位页面中5大经历区块的大标题
+ *   2. 根据 TitleSignature 找出页面所有同结构大标题，确定管辖范围边界
+ *   3. 在管辖范围内统计已展开段数（核心字段标签+输入框组合数量）
+ *   4. 对比简历数据段数，不够则查找并点击"添加"按钮补足
+ *   5. 每次点击后重新确认段数，记录新增段的 DOM 结构信息
+ */
+
+import { EXPERIENCE_SECTION_CONFIGS, JOB_FORM_LABELS } from "./constants"
+import { delay } from "./autofill"
+import type { ExperienceSection, ExperienceSectionConfig, ResumeData } from "./types"
+
+// ====================================================================
+// 一、类型定义
+// ====================================================================
+
+/** 大标题的 HTML 标签 + CSS 类名特征 */
+export interface TitleSignature {
+  /** 第一层有类名的祖先：标签名 + 完整类名 */
+  layer1: { tag: string; className: string } | null
+  /** 第二层有类名的祖先：标签名 + 完整类名 */
+  layer2: { tag: string; className: string } | null
+}
+
+/** 页面中所有大标题的信息（包括非经历标题） */
+interface PageTitle {
+  element: Element
+  text: string
+  signature: TitleSignature
+}
+
+/** 经历区块定位结果 */
+export interface ExperienceSectionLocateResult {
+  section: ExperienceSection
+  titleElement: Element | null
+  titleText: string
+  titleSignature: TitleSignature
+  /** 页面已展开的段数 */
+  expandedCount: number
+  /** 每段经历的 DOM 范围信息（用于后续填写时定位） */
+  segmentRanges: SegmentRange[]
+}
+
+/** 单段经历的 DOM 范围信息 */
+export interface SegmentRange {
+  /** 该段经历的起始标志元素（核心字段标签元素） */
+  startElement: Element
+  /** 该段经历的起始标志文字 */
+  startText: string
+  /** 该段经历是否为新增的（通过点击添加按钮产生） */
+  isNewlyAdded: boolean
+}
+
+// ====================================================================
+// 二、大标题定位相关
+// ====================================================================
+
+/**
+ * 在 DOM 中查找经历区块的大标题元素
+ * 用 TreeWalker 深度优先遍历，找到直接包含标题文字的最内层元素
+ */
+function findSectionTitle(
+  rootEl: Element,
+  lang: "zh" | "en",
+  config: ExperienceSectionConfig
+): { titleElement: Element; titleText: string } | null {
+  const keywords = lang === "zh" ? config.zh : config.en
+  const walker = document.createTreeWalker(rootEl, NodeFilter.SHOW_ELEMENT)
+  let node: Node | null = walker.nextNode()
+
+  while (node) {
+    const el = node as Element
+    const directText = Array.from(el.childNodes)
+      .filter((child) => child.nodeType === Node.TEXT_NODE)
+      .map((child) => child.textContent?.trim())
+      .filter(Boolean)
+      .join("")
+
+    if (directText) {
+      for (const keyword of keywords) {
+        if (directText.includes(keyword) && directText.length < keyword.length + 10) {
+          return { titleElement: el, titleText: directText }
+        }
+      }
+    }
+    node = walker.nextNode()
+  }
+  return null
+}
+
+/**
+ * 提取大标题元素的 TitleSignature
+ * 从标题元素的父级开始向上查找两层有 CSS 类名的祖先
+ */
+function extractTitleSignature(titleEl: Element): TitleSignature {
+  const signature: TitleSignature = { layer1: null, layer2: null }
+  let layerFound = 0
+  let current: Element | null = titleEl.parentElement
+
+  while (current && layerFound < 2) {
+    const cls = current.className && typeof current.className === "string" ? current.className.trim() : ""
+    if (cls) {
+      if (layerFound === 0) {
+        signature.layer1 = { tag: current.tagName.toLowerCase(), className: cls }
+      } else {
+        signature.layer2 = { tag: current.tagName.toLowerCase(), className: cls }
+      }
+      layerFound++
+    }
+    current = current.parentElement
+  }
+  return signature
+}
+
+/**
+ * 根据参考 TitleSignature，在页面中找出所有具有相同 layer2 类名的大标题
+ * 用于确定所有大标题的位置（包括非经历标题如"更新说明"、"授权文本"等）
+ */
+function findAllTitlesWithSameSignature(
+  rootEl: Element,
+  refSignature: TitleSignature
+): PageTitle[] {
+  const results: PageTitle[] = []
+  if (!refSignature.layer2) return results
+
+  const layer2Classes = refSignature.layer2.className.split(/\s+/)
+  let containers: Element[]
+  try {
+    const selector = `.${CSS.escape(layer2Classes[0])}`
+    containers = Array.from(rootEl.querySelectorAll(selector))
+  } catch {
+    return results
+  }
+
+  for (const container of containers) {
+    const walker = document.createTreeWalker(container, NodeFilter.SHOW_ELEMENT)
+    let node: Node | null = walker.nextNode()
+    let foundTitle: PageTitle | null = null
+
+    while (node) {
+      const el = node as Element
+      const directText = Array.from(el.childNodes)
+        .filter((child) => child.nodeType === Node.TEXT_NODE)
+        .map((child) => child.textContent?.trim())
+        .filter(Boolean)
+        .join("")
+
+      if (directText && directText.length > 0 && directText.length < 20 && el.children.length === 0) {
+        const sig = extractTitleSignature(el)
+        if (sig.layer2 && sig.layer2.className === refSignature.layer2!.className) {
+          foundTitle = { element: el, text: directText, signature: sig }
+          break
+        }
+      }
+      node = walker.nextNode()
+    }
+    if (foundTitle) results.push(foundTitle)
+  }
+
+  // 按 DOM 顺序排列
+  results.sort((a, b) => {
+    const pos = a.element.compareDocumentPosition(b.element)
+    if (pos & Node.DOCUMENT_POSITION_FOLLOWING) return -1
+    if (pos & Node.DOCUMENT_POSITION_PRECEDING) return 1
+    return 0
+  })
+  return results
+}
+
+// ====================================================================
+// 三、段数统计相关
+// ====================================================================
+
+/** input 选择器 */
+const INPUT_SEL = "input:not([type='hidden']):not([type='submit']):not([type='button']):not([type='checkbox']):not([type='radio']):not([type='file']):not([disabled]), textarea:not([disabled]), [class*='select'], [class*='picker']"
+
+/** 每种经历类型的通用关联标签关键词（fallback 用） */
+const SECTION_FALLBACK_KEYWORDS: Record<ExperienceSection, { zh: string[]; en: string[] }[]> = {
+  education: [
+    { zh: ["学校", "学校名称", "毕业院校", "院校", "毕业学校"], en: ["School", "University", "College", "Institution"] },
+  ],
+  work: [
+    { zh: ["公司", "公司名称", "单位名称", "工作单位"], en: ["Company", "Company Name", "Employer"] },
+  ],
+  internship: [
+    { zh: ["公司", "公司名称", "单位名称", "实习公司", "实习单位"], en: ["Company", "Company Name", "Intern Company"] },
+  ],
+  project: [
+    { zh: ["项目名称", "项目名", "项目"], en: ["Project Name", "Project", "Project Title"] },
+  ],
+  competition: [
+    { zh: ["竞赛名称", "比赛名称", "竞赛"], en: ["Competition Name", "Contest Name", "Competition"] },
+  ],
+}
+
+/**
+ * 获取管辖范围内的所有候选标签元素
+ */
+function getRangeElements(titleEl: Element, nextTitleEl: Element | null): Element[] {
+  const allCandidates = document.body.querySelectorAll("label, span, div, td, th, p, dt, legend")
+  const rangeElements: Element[] = []
+  for (const el of Array.from(allCandidates)) {
+    if (!(titleEl.compareDocumentPosition(el) & Node.DOCUMENT_POSITION_FOLLOWING)) continue
+    if (nextTitleEl && !(nextTitleEl.compareDocumentPosition(el) & Node.DOCUMENT_POSITION_PRECEDING)) continue
+    rangeElements.push(el)
+  }
+  return rangeElements
+}
+
+/**
+ * 在给定元素列表中，数"关键词文本 + 输入框"组合的数量，并返回匹配到的标签元素
+ */
+function findLabelInputCombos(elements: Element[], keywords: string[]): Element[] {
+  const matched: Element[] = []
+  for (const el of elements) {
+    const directText = Array.from(el.childNodes)
+      .filter((node) => node.nodeType === Node.TEXT_NODE)
+      .map((node) => node.textContent?.trim())
+      .filter(Boolean)
+      .join("")
+    if (!directText) continue
+
+    let isMatch = false
+    for (const keyword of keywords) {
+      if (directText.includes(keyword) && directText.length < keyword.length + 10) {
+        isMatch = true
+        break
+      }
+    }
+    if (!isMatch) continue
+    if (hasNearbyInput(el)) matched.push(el)
+  }
+  return matched
+}
+
+/**
+ * 判断标签元素附近是否有输入框
+ */
+function hasNearbyInput(labelEl: Element): boolean {
+  // 策略1：后续兄弟元素
+  let sibling = labelEl.nextElementSibling
+  let siblingCount = 0
+  while (sibling && siblingCount < 3) {
+    if (sibling.querySelector(INPUT_SEL) || sibling.matches(INPUT_SEL)) return true
+    sibling = sibling.nextElementSibling
+    siblingCount++
+  }
+  // 策略2：向上找父级容器
+  let parent: Element | null = labelEl.parentElement
+  for (let i = 0; i < 4 && parent; i++) {
+    const inputs = parent.querySelectorAll(INPUT_SEL)
+    if (inputs.length > 0) return true
+    parent = parent.parentElement
+  }
+  return false
+}
+
+/**
+ * 统计经历区块已展开段数
+ * 返回段数和匹配到的核心标签元素列表
+ */
+function countExpandedInRange(
+  titleEl: Element,
+  nextTitleEl: Element | null,
+  config: ExperienceSectionConfig,
+  lang: "zh" | "en"
+): { count: number; matchedElements: Element[]; usedKeywords: string[] } {
+  const rangeElements = getRangeElements(titleEl, nextTitleEl)
+
+  // 第一轮：用该 section 自己的标签关键词
+  const sectionLabels = JOB_FORM_LABELS.filter((item) => item.section === config.section)
+  const coreLabel = sectionLabels.find((item) => item.key === config.coreFieldKey)
+  const orderedLabels = coreLabel
+    ? [coreLabel, ...sectionLabels.filter((item) => item.key !== config.coreFieldKey)]
+    : sectionLabels
+
+  for (const labelItem of orderedLabels) {
+    const keywords = lang === "zh" ? labelItem.zh : labelItem.en
+    const matched = findLabelInputCombos(rangeElements, keywords)
+    if (matched.length > 0) {
+      return { count: matched.length, matchedElements: matched, usedKeywords: keywords }
+    }
+  }
+
+  // 第二轮：用 fallback 关键词
+  const fallbacks = SECTION_FALLBACK_KEYWORDS[config.section]
+  if (fallbacks) {
+    for (const fb of fallbacks) {
+      const keywords = lang === "zh" ? fb.zh : fb.en
+      const matched = findLabelInputCombos(rangeElements, keywords)
+      if (matched.length > 0) {
+        return { count: matched.length, matchedElements: matched, usedKeywords: keywords }
+      }
+    }
+  }
+
+  return { count: 0, matchedElements: [], usedKeywords: [] }
+}
+
+// ====================================================================
+// 四、添加按钮查找与点击
+// ====================================================================
+
+/**
+ * 在经历大标题的管辖范围内查找最近的"添加"按钮
+ * 从大标题元素开始，在 DOM 从上到下的顺序中找第一个包含添加关键词的可点击元素
+ */
+function findAddButton(
+  titleEl: Element,
+  nextTitleEl: Element | null,
+  config: ExperienceSectionConfig,
+  lang: "zh" | "en"
+): Element | null {
+  const addKeywords = lang === "zh" ? config.addButtonZh : config.addButtonEn
+  // 在管辖范围内查找包含添加关键词的元素
+  const allElements = document.body.querySelectorAll("button, a, span, div, [role='button']")
+
+  for (const el of Array.from(allElements)) {
+    // 必须在 titleEl 之后
+    if (!(titleEl.compareDocumentPosition(el) & Node.DOCUMENT_POSITION_FOLLOWING)) continue
+    // 必须在 nextTitleEl 之前
+    if (nextTitleEl && !(nextTitleEl.compareDocumentPosition(el) & Node.DOCUMENT_POSITION_PRECEDING)) continue
+
+    const text = el.textContent?.trim() || ""
+    // 匹配添加关键词
+    for (const keyword of addKeywords) {
+      if (text.includes(keyword) && text.length < keyword.length + 10) {
+        return el
+      }
+    }
+  }
+  return null
+}
+
+/**
+ * 点击添加按钮（逐层点击，检测到段数增加立即停止）
+ *
+ * 策略：
+ *   - 从添加文字的最内层元素开始，逐层向上点击
+ *   - 每点一层后等待 DOM 更新，检测段数是否增加
+ *   - 一旦某层点击后段数增加了，立即停止，不再继续往上冒泡
+ *   - 如果5层内找到 button 标签，最多点到 button 层
+ *   - 跳过包含输入框/富文本/radio 的层级（这些不可能是添加按钮）
+ *
+ * @param addBtnEl - 包含添加文字的元素
+ * @param titleEl - 当前经历大标题元素
+ * @param nextTitleEl - 下一个大标题元素（范围边界）
+ * @param config - 经历区块配置
+ * @param lang - 页面语言
+ * @returns 点击后是否成功增加了段数
+ */
+async function clickAddButton(
+  addBtnEl: Element,
+  titleEl: Element,
+  nextTitleEl: Element | null,
+  config: ExperienceSectionConfig,
+  lang: "zh" | "en"
+): Promise<boolean> {
+  // 找到包含添加文字的最内层元素
+  let innerEl: Element = addBtnEl
+  while (innerEl.children.length === 1) {
+    const child = innerEl.children[0]
+    if (child.textContent?.trim() === addBtnEl.textContent?.trim()) {
+      innerEl = child
+    } else {
+      break
+    }
+  }
+
+  // 从最内层向外收集要点击的层级（最多5层）
+  const clickTargets: HTMLElement[] = []
+  let current: Element | null = innerEl
+
+  for (let i = 0; i < 5 && current; i++) {
+    // 跳过包含输入框/富文本/radio 的层级
+    const hasFormEl = current.querySelector("input, textarea, [type='radio'], [contenteditable='true']")
+    if (!hasFormEl) {
+      clickTargets.push(current as HTMLElement)
+    }
+    // 如果当前层是 button，收集后停止向上
+    if (current.tagName.toLowerCase() === "button") break
+    current = current.parentElement
+  }
+
+  // 记录点击前的段数
+  const beforeCount = countExpandedInRange(titleEl, nextTitleEl, config, lang).count
+
+  // 逐层点击，每层点击后检测段数是否增加
+  for (const target of clickTargets) {
+    target.click()
+    await delay(400) // 等待 DOM 更新
+
+    // 检测段数是否增加
+    const afterCount = countExpandedInRange(titleEl, nextTitleEl, config, lang).count
+    if (afterCount > beforeCount) {
+      // 段数增加了，停止冒泡
+      return true
+    }
+  }
+
+  // 所有层都点了但段数没变化
+  return false
+}
+
+// ====================================================================
+// 五、段数补足主流程
+// ====================================================================
+
+/**
+ * 定位页面中所有经历区块并统计已展开段数（不含添加操作）
+ * 这是第一步：只做定位和统计，返回结果供后续使用
+ */
+export function locateExperienceSections(
+  rootEl: Element = document.body,
+  lang: "zh" | "en"
+): ExperienceSectionLocateResult[] {
+  console.log("===== OfferPie: 开始定位经历区块 =====")
+
+  // 定位5种经历的大标题
+  const located: { config: ExperienceSectionConfig; titleElement: Element; titleText: string }[] = []
+  const notFound: ExperienceSectionConfig[] = []
+
+  for (const config of EXPERIENCE_SECTION_CONFIGS) {
+    const result = findSectionTitle(rootEl, lang, config)
+    if (result) {
+      located.push({ config, titleElement: result.titleElement, titleText: result.titleText })
+    } else {
+      notFound.push(config)
+    }
+  }
+
+  if (located.length === 0) {
+    console.log("  ❌ 未找到任何经历区块大标题")
+    console.log("===== OfferPie: 经历区块定位完毕 =====")
+    return notFound.map((config) => ({
+      section: config.section, titleElement: null, titleText: "",
+      titleSignature: { layer1: null, layer2: null }, expandedCount: 0, segmentRanges: [],
+    }))
+  }
+
+  // 用第一个找到的大标题的 TitleSignature 找出页面所有同结构大标题
+  const refSignature = extractTitleSignature(located[0].titleElement)
+  const allPageTitles = findAllTitlesWithSameSignature(rootEl, refSignature)
+
+  console.log(`  --- 页面所有大标题（共 ${allPageTitles.length} 个，按 DOM 顺序）---`)
+  for (const pt of allPageTitles) {
+    console.log(`    标题: "${pt.text}" | TitleSignature: layer1=${pt.signature.layer1 ? `<${pt.signature.layer1.tag} class="${pt.signature.layer1.className}">` : "null"} layer2=${pt.signature.layer2 ? `<${pt.signature.layer2.tag} class="${pt.signature.layer2.className}">` : "null"}`)
+  }
+  console.log(`  --- 大标题列表结束 ---`)
+
+  // 对每个经历大标题统计段数
+  const results: ExperienceSectionLocateResult[] = []
+
+  for (const { config, titleElement, titleText } of located) {
+    const titleSignature = extractTitleSignature(titleElement)
+    const idx = allPageTitles.findIndex((pt) => pt.element === titleElement)
+    const nextTitleEl = idx >= 0 && idx < allPageTitles.length - 1 ? allPageTitles[idx + 1].element : null
+
+    const { count, matchedElements, usedKeywords } = countExpandedInRange(titleElement, nextTitleEl, config, lang)
+
+    console.log(
+      `  [${config.section}] ✅ 标题: "${titleText}"` +
+      ` | 范围边界: "${allPageTitles[idx + 1]?.text || "页面底部"}"` +
+      ` | 计数关键词: (${usedKeywords.join("/")})` +
+      ` | 标签+输入框组合 ${count} 个`
+    )
+    console.log(`    → 已展开段数: ${count}`)
+
+    // 记录每段经历的起始标志
+    const segmentRanges: SegmentRange[] = matchedElements.map((el) => ({
+      startElement: el,
+      startText: el.textContent?.trim() || "",
+      isNewlyAdded: false,
+    }))
+
+    results.push({ section: config.section, titleElement, titleText, titleSignature, expandedCount: count, segmentRanges })
+  }
+
+  // 未找到的区块
+  for (const config of notFound) {
+    console.log(`  [${config.section}] ❌ 未找到区块标题（关键词: ${(lang === "zh" ? config.zh : config.en).join("/")}）`)
+    results.push({
+      section: config.section, titleElement: null, titleText: "",
+      titleSignature: { layer1: null, layer2: null }, expandedCount: 0, segmentRanges: [],
+    })
+  }
+
+  console.log("===== OfferPie: 经历区块定位完毕 =====")
+  return results
+}
+
+/**
+ * 补足经历段数：对比简历数据，点击添加按钮补足不够的段数
+ *
+ * 流程：
+ *   1. 对每种经历，对比简历数据段数 vs 页面已展开段数
+ *   2. 如果简历段数 > 页面段数，查找并点击"添加"按钮
+ *   3. 每次点击后等待 DOM 更新，重新统计段数确认是否增加
+ *   4. 记录新增段的 DOM 信息
+ *
+ * @param locateResults - locateExperienceSections 的返回结果
+ * @param resumeData - 简历数据
+ * @param lang - 页面语言
+ * @returns 更新后的定位结果（含新增段信息）
+ */
+export async function expandExperienceSections(
+  locateResults: ExperienceSectionLocateResult[],
+  resumeData: ResumeData,
+  lang: "zh" | "en"
+): Promise<ExperienceSectionLocateResult[]> {
+  console.log("===== OfferPie: 开始补足经历段数 =====")
+
+  // 重新获取页面所有大标题（用于确定范围边界）
+  const firstLocated = locateResults.find((r) => r.titleElement)
+  if (!firstLocated || !firstLocated.titleElement) {
+    console.log("  ❌ 无经历大标题，跳过补足")
+    console.log("===== OfferPie: 经历段数补足完毕 =====")
+    return locateResults
+  }
+  const refSignature = extractTitleSignature(firstLocated.titleElement)
+  let allPageTitles = findAllTitlesWithSameSignature(document.body, refSignature)
+
+  for (const result of locateResults) {
+    if (!result.titleElement) continue
+
+    // 获取简历数据中该经历的段数
+    const resumeCount = (resumeData[result.section] as unknown[])?.length || 0
+    if (resumeCount <= result.expandedCount) {
+      console.log(`  [${result.section}] 简历${resumeCount}段 ≤ 页面${result.expandedCount}段，无需添加`)
+      continue
+    }
+
+    const needAdd = resumeCount - result.expandedCount
+    console.log(`  [${result.section}] 简历${resumeCount}段 > 页面${result.expandedCount}段，需添加 ${needAdd} 段`)
+
+    // 找到对应的 config
+    const config = EXPERIENCE_SECTION_CONFIGS.find((c) => c.section === result.section)
+    if (!config) continue
+
+    // 逐次点击添加按钮
+    for (let addIdx = 0; addIdx < needAdd; addIdx++) {
+      // 每次点击前重新统计当前段数，确认是否真的还需要添加
+      allPageTitles = findAllTitlesWithSameSignature(document.body, refSignature)
+      const checkIdx = allPageTitles.findIndex((pt) => pt.element === result.titleElement)
+      const checkNextEl = checkIdx >= 0 && checkIdx < allPageTitles.length - 1 ? allPageTitles[checkIdx + 1].element : null
+      const currentResult = countExpandedInRange(result.titleElement!, checkNextEl, config, lang)
+      result.expandedCount = currentResult.count
+
+      if (result.expandedCount >= resumeCount) {
+        console.log(`    ✅ 当前段数${result.expandedCount}已达到简历段数${resumeCount}，无需继续添加`)
+        // 更新 segmentRanges
+        result.segmentRanges = currentResult.matchedElements.map((el, i) => ({
+          startElement: el,
+          startText: el.textContent?.trim() || "",
+          isNewlyAdded: i >= (resumeCount - needAdd), // 超出初始段数的都标记为新增
+        }))
+        break
+      }
+      // 每次点击前重新获取范围边界（因为 DOM 可能已变化）
+      allPageTitles = findAllTitlesWithSameSignature(document.body, refSignature)
+      const idx = allPageTitles.findIndex((pt) => pt.element === result.titleElement)
+      const nextTitleEl = idx >= 0 && idx < allPageTitles.length - 1 ? allPageTitles[idx + 1].element : null
+
+      // 查找添加按钮（管辖范围内从上到下第一个）
+      const addBtn = findAddButton(result.titleElement, nextTitleEl, config, lang)
+      if (!addBtn) {
+        console.log(`    ❌ 第${addIdx + 1}次：未找到添加按钮，停止`)
+        break
+      }
+
+      console.log(`    → 第${addIdx + 1}次：找到添加按钮 "${addBtn.textContent?.trim()}"，点击中...`)
+
+      // 记录点击前的段数
+      const beforeCount = countExpandedInRange(result.titleElement, nextTitleEl, config, lang).count
+
+      // 点击添加按钮（逐层点击，检测到段数增加立即停止）
+      await clickAddButton(addBtn, result.titleElement, nextTitleEl, config, lang)
+      await delay(300) // 额外等待确保 DOM 稳定
+
+      // 重新获取范围边界并统计段数
+      allPageTitles = findAllTitlesWithSameSignature(document.body, refSignature)
+      const newIdx = allPageTitles.findIndex((pt) => pt.element === result.titleElement)
+      const newNextTitleEl = newIdx >= 0 && newIdx < allPageTitles.length - 1 ? allPageTitles[newIdx + 1].element : null
+      const afterResult = countExpandedInRange(result.titleElement, newNextTitleEl, config, lang)
+      const afterCount = afterResult.count
+
+      if (afterCount > beforeCount) {
+        console.log(`    ✅ 第${addIdx + 1}次：段数 ${beforeCount} → ${afterCount}，添加成功`)
+        // 记录新增段的信息
+        const newElements = afterResult.matchedElements.filter(
+          (el) => !result.segmentRanges.some((seg) => seg.startElement === el)
+        )
+        for (const newEl of newElements) {
+          result.segmentRanges.push({
+            startElement: newEl,
+            startText: newEl.textContent?.trim() || "",
+            isNewlyAdded: true,
+          })
+        }
+        result.expandedCount = afterCount
+        // 点击后立即检查是否已达到目标段数
+        if (result.expandedCount >= resumeCount) {
+          console.log(`    ✅ 当前段数${result.expandedCount}已达到简历段数${resumeCount}，停止添加`)
+          break
+        }
+      } else {
+        console.log(`    ⚠️ 第${addIdx + 1}次：段数未变化 (${beforeCount} → ${afterCount})，可能点击无效`)
+        // 多等一会再试一次确认
+        await delay(500)
+        const retryResult = countExpandedInRange(result.titleElement, newNextTitleEl, config, lang)
+        if (retryResult.count > beforeCount) {
+          console.log(`    ✅ 第${addIdx + 1}次（重试）：段数 ${beforeCount} → ${retryResult.count}，添加成功`)
+          const newElements = retryResult.matchedElements.filter(
+            (el) => !result.segmentRanges.some((seg) => seg.startElement === el)
+          )
+          for (const newEl of newElements) {
+            result.segmentRanges.push({
+              startElement: newEl,
+              startText: newEl.textContent?.trim() || "",
+              isNewlyAdded: true,
+            })
+          }
+          result.expandedCount = retryResult.count
+          // 重试后也检查是否已达到目标
+          if (result.expandedCount >= resumeCount) {
+            console.log(`    ✅ 当前段数${result.expandedCount}已达到简历段数${resumeCount}，停止添加`)
+            break
+          }
+        } else {
+          console.log(`    ❌ 第${addIdx + 1}次：重试后段数仍未变化，停止添加`)
+          break
+        }
+      }
+    }
+  }
+
+  // 打印最终结果
+  console.log("===== OfferPie: 经历段数补足结果 =====")
+  for (const r of locateResults) {
+    const resumeCount = (resumeData[r.section] as unknown[])?.length || 0
+    console.log(
+      `  [${r.section}] 简历数据${resumeCount}段 | 页面已展开${r.expandedCount}段` +
+      ` | 段落信息: ${r.segmentRanges.map((s) => `"${s.startText}"${s.isNewlyAdded ? "(新增)" : ""}`).join(", ") || "无"}`
+    )
+  }
+  console.log("===== OfferPie: 经历段数补足完毕 =====")
+
+  return locateResults
+}