diff --git a/.gitea/ai-review/exclusions.json b/.gitea/ai-review/exclusions.json
index 0345147..f28374c 100644
--- a/.gitea/ai-review/exclusions.json
+++ b/.gitea/ai-review/exclusions.json
@@ -381,5 +381,23 @@
         "role":  "Maya",
         "location":  "app/preflight.js:107",
         "suggestion":  "在 `verifyLLM` 函數中，呼叫 `axios.post` 時缺少 `httpsAgent` 選項。這會導致即使設定了 `GITEA_SKIP_TLS_VERIFY`，LLM 的 API 請求仍可能因 TLS 憑證問題而失敗。請將 `httpsAgent` 傳遞給 `axios.post` 的選項物件，例如：`await axios.post(`${base}/chat/completions`, payload, { headers, timeout: 30000, httpsAgent });`"
+    },
+    {
+        "level":  "warning",
+        "role":  "Aria",
+        "location":  "app/preflight.test.js:25",
+        "suggestion":  "測試描述使用英文。請確保專案在測試描述的語言上保持一致性。如果專案主要使用繁體中文（如 app/preflight.js 中的 JSDoc 和日誌），則應將此測試描述翻譯為繁體中文。"
+    },
+    {
+        "level":  "info",
+        "role":  "Aria",
+        "location":  "app/preflight.test.js:1-4",
+        "suggestion":  "匯入語句的排序不一致。建議遵循一致的排序規則，例如：內建模組、第三方模組、本地模組，並在各組內按字母順序排序。"
+    },
+    {
+        "level":  "info",
+        "role":  "Aria",
+        "location":  "app/preflight.test.js:14",
+        "suggestion":  "函數名稱 clearLLMEnv 雖然可理解，但可以更具描述性，例如 clearLlmEnvironmentVariables 或 resetLlmEnv。"
     }
 ]
\ No newline at end of file
diff --git a/.gitea/ai-review/findings.json b/.gitea/ai-review/findings.json
index 946ea6a..48848e4 100644
--- a/.gitea/ai-review/findings.json
+++ b/.gitea/ai-review/findings.json
@@ -1,37 +1,16 @@
 [
   {
     "level": "warning",
-    "role": "Aria",
-    "location": "app/preflight.test.js:25",
-    "suggestion": "測試描述使用英文。請確保專案在測試描述的語言上保持一致性。如果專案主要使用繁體中文（如 `app/preflight.js` 中的 JSDoc 和日誌），則應將此測試描述翻譯為繁體中文。",
+    "role": "Maya",
+    "location": "app/comments.test.js:84",
+    "suggestion": "請為 `postNewCriticalComments` 函數新增一個測試案例，驗證當傳入空的 `findings` 陣列時，函數能正確執行且不發布任何 comment。這能確保邊界條件的處理是符合預期的。",
     "is_new": true
   },
   {
-    "level": "info",
-    "role": "Aria",
-    "location": "app/preflight.test.js:1-4",
-    "suggestion": "匯入語句的排序不一致。建議遵循一致的排序規則，例如：內建模組、第三方模組、本地模組，並在各組內按字母順序排序。",
-    "is_new": true
-  },
-  {
-    "level": "info",
-    "role": "Aria",
-    "location": "app/preflight.test.js:7-12",
-    "suggestion": "此陣列字面量較長。雖然已分行，但可以考慮將每個元素獨立一行並保持一致的縮排，以提高可讀性。",
-    "is_new": true
-  },
-  {
-    "level": "info",
-    "role": "Aria",
-    "location": "app/preflight.test.js:14",
-    "suggestion": "函數名稱 `clearLLMEnv` 雖然可理解，但可以更具描述性，例如 `clearLlmEnvironmentVariables` 或 `resetLlmEnv`。",
-    "is_new": true
-  },
-  {
-    "level": "info",
-    "role": "Aria",
-    "location": "app/preflight.test.js:149",
-    "suggestion": "此單行註解風格與其他部分可能不一致。建議遵循專案統一的註解風格指南。",
+    "level": "warning",
+    "role": "Maya",
+    "location": "app/comments.test.js:84",
+    "suggestion": "目前 `postNewCriticalComments` 的測試案例主要針對單一 critical finding。建議新增一個測試案例，包含多個 `is_new` 且 `level === 'critical'` 的 findings，其中一些可以成功發布行內 comment，另一些則因 `parseLocation` 失敗或 `postInline` 拋出錯誤而降級為一般 comment。這能更全面地驗證迴圈邏輯和多個問題的處理。",
     "is_new": true
   }
 ]
diff --git a/README.md b/README.md
index dcda95a..82f5a68 100644
--- a/README.md
+++ b/README.md
@@ -16,7 +16,7 @@
 4. 讀取來源分支中的排除問題檔案(`.gitea/ai-review/exclusions.json`)，用來過濾 PR 問題表格中不需要處理的問題
 5. 從 PR 問題表格中取出所有舊問題，依照等級排序後 Comment 到 Pull Request
 6. 從 PR 問題表格中取出所有新問題，排除嚴重等級的問題後 Comment 到 Pull Request
-7. 從 PR 問題表格中取出所有新問題，將每個嚴重等級的問題 Comment 到 Pull Request
+7. 從 PR 問題表格中取出所有新問題，將每個嚴重等級的問題以 Gitea 行內 review comment 標註在問題所在的檔案與行數上，留言內容為等級／審查員／建議；若問題位置無法解析出行號（例如未標行號或一次列出多個檔案），或該行不在本次 diff 範圍內導致行內留言失敗，則降級為一般 PR Comment
 8. Commit 問題檔案，將 workspace 中實際存在的同步檔覆蓋到記憶區；workspace 沒有的同步檔就略過，不會刪除記憶區既有內容。自動提交的 commit message 會帶上 `[ai-review-bot]`，供 workflow 判斷是否要跳過重跑
 9. 如果 PR 問題表格中有嚴重問題，則不要讓 workflow 執行成功(exit 1)
 
diff --git a/app/comments.js b/app/comments.js
index 73d7c25..94a6210 100644
--- a/app/comments.js
+++ b/app/comments.js
@@ -1,8 +1,8 @@
 import fs from 'fs';
 import path from 'path';
-import { postComment } from './gitea.js';
+import { postComment, postPullReviewComment } from './gitea.js';
 import { FINDINGS_PATH } from './config.js';
-import { ok, line } from './log.js';
+import { ok, line, warn } from './log.js';
 
 const LEVEL_EMOJI = { critical: '🔴', warning: '🟡', info: '🔵' };
 const LEVEL_LABEL = { critical: '嚴重', warning: '警告', info: '建議' };
@@ -16,6 +16,26 @@ function buildTable(findings) {
   return `| 等級 | 審查員 | 位置 | 建議 |\n|------|--------|------|------|\n${rows}`;
 }
 
+const levelText = f => `${LEVEL_EMOJI[f.level] || ''} ${LEVEL_LABEL[f.level] || f.level}`.trim();
+
+/**
+ * 解析 finding 的 location 取出檔案與行號，供行內 comment 標註使用。
+ * 支援 "file:19" 與 "file:70-82"（取起始行）；無行號或含多個檔案（逗號）時回傳 null。
+ */
+export function parseLocation(location) {
+  if (typeof location !== 'string') return null;
+  const trimmed = location.trim();
+  if (trimmed.includes(',')) return null;
+  const match = trimmed.match(/^(.+?):(\d+)(?:-\d+)?$/);
+  if (!match) return null;
+  return { file: match[1], line: Number(match[2]) };
+}
+
+/** 行內 comment 內容：等級／審查員／建議 */
+function inlineCommentBody(f) {
+  return `**等級**：${levelText(f)}\n**審查員**：${f.role}\n**建議**：${f.suggestion}`;
+}
+
 /**
  * 寫入 findings.json。
  * 預設寫到 workspace；若提供 mirrorDir，則同步寫入另一份供 repo commit 使用。
@@ -61,17 +81,29 @@ export async function postNewNonCriticalComment(findings) {
 }
 
 /**
- * 每個新 critical 問題各發一個 comment
+ * 每個新 critical 問題各發一個 comment。
+ * 優先用 Gitea 行內 review comment 標註問題檔案與行數（內容為等級／審查員／建議）；
+ * 若 location 無法解析出行號，或行內發布失敗（例如該行不在 diff 範圍），則降級為一般 comment。
  */
-export async function postNewCriticalComments(findings) {
+export async function postNewCriticalComments(findings, deps = {}) {
+  const { postInline = postPullReviewComment, postIssue = postComment } = deps;
   const criticals = findings.filter(f => f.is_new && f.level === 'critical');
   if (criticals.length === 0) {
     line('無新的嚴重問題，跳過');
     return;
   }
   for (const f of criticals) {
-    const body = `## 🚨 嚴重問題\n\n${buildTable([f])}`;
-    await postComment(body);
+    const loc = parseLocation(f.location);
+    if (loc) {
+      try {
+        await postInline({ path: loc.file, line: loc.line, body: inlineCommentBody(f) });
+        ok(`嚴重問題 行內 comment 發布: [${f.role}] ${loc.file}:${loc.line}`);
+        continue;
+      } catch (e) {
+        warn(`行內 comment 發布失敗，改用一般 comment: [${f.role}] ${f.location} error=${e.message}`);
+      }
+    }
+    await postIssue(`## 🚨 嚴重問題\n\n${buildTable([f])}`);
     ok(`嚴重問題 comment 發布: [${f.role}] ${f.location}`);
   }
 }
diff --git a/app/comments.test.js b/app/comments.test.js
index 539ac2b..4e4a96c 100644
--- a/app/comments.test.js
+++ b/app/comments.test.js
@@ -3,7 +3,7 @@ import assert from 'node:assert/strict';
 import fs from 'node:fs';
 import os from 'node:os';
 import path from 'node:path';
-import { saveFindings } from './comments.js';
+import { saveFindings, parseLocation, postNewCriticalComments } from './comments.js';
 import { FINDINGS_PATH } from './config.js';
 
 describe('saveFindings', () => {
@@ -73,3 +73,81 @@ describe('saveFindings', () => {
     }
   });
 });
+
+describe('parseLocation', () => {
+  it('parses file and single line', () => {
+    assert.deepEqual(parseLocation('app/preflight.js:19'), { file: 'app/preflight.js', line: 19 });
+  });
+
+  it('uses the start line for a line range', () => {
+    assert.deepEqual(parseLocation('app/preflight.js:70-82'), { file: 'app/preflight.js', line: 70 });
+  });
+
+  it('returns null when there is no line number', () => {
+    assert.equal(parseLocation('app/preflight.test.js'), null);
+  });
+
+  it('returns null when multiple files are listed', () => {
+    assert.equal(parseLocation('Dockerfile, app/git.js, app/gitea.js'), null);
+  });
+
+  it('returns null for non-string input', () => {
+    assert.equal(parseLocation(undefined), null);
+  });
+});
+
+describe('postNewCriticalComments', () => {
+  const critical = { level: 'critical', role: 'Rex', location: 'app/preflight.js:19', suggestion: '修這個', is_new: true };
+
+  it('posts an inline review comment annotating file/line with level/role/suggestion', async () => {
+    const inlineCalls = [];
+    const issueCalls = [];
+    await postNewCriticalComments([critical], {
+      postInline: async (args) => { inlineCalls.push(args); },
+      postIssue: async (body) => { issueCalls.push(body); },
+    });
+    assert.equal(inlineCalls.length, 1);
+    assert.equal(issueCalls.length, 0);
+    assert.equal(inlineCalls[0].path, 'app/preflight.js');
+    assert.equal(inlineCalls[0].line, 19);
+    assert.match(inlineCalls[0].body, /等級/);
+    assert.match(inlineCalls[0].body, /審查員.*Rex/s);
+    assert.match(inlineCalls[0].body, /建議.*修這個/s);
+  });
+
+  it('falls back to a normal comment when the location has no line number', async () => {
+    const inlineCalls = [];
+    const issueCalls = [];
+    await postNewCriticalComments([{ ...critical, location: 'app/preflight.js' }], {
+      postInline: async (args) => { inlineCalls.push(args); },
+      postIssue: async (body) => { issueCalls.push(body); },
+    });
+    assert.equal(inlineCalls.length, 0);
+    assert.equal(issueCalls.length, 1);
+    assert.match(issueCalls[0], /嚴重問題/);
+  });
+
+  it('falls back to a normal comment when the inline post fails', async () => {
+    const issueCalls = [];
+    await postNewCriticalComments([critical], {
+      postInline: async () => { throw new Error('line not in diff'); },
+      postIssue: async (body) => { issueCalls.push(body); },
+    });
+    assert.equal(issueCalls.length, 1);
+    assert.match(issueCalls[0], /嚴重問題/);
+  });
+
+  it('only posts for new critical findings', async () => {
+    const inlineCalls = [];
+    const issueCalls = [];
+    await postNewCriticalComments([
+      { ...critical, is_new: false },
+      { level: 'warning', role: 'Leo', location: 'a.js:1', suggestion: 'x', is_new: true },
+    ], {
+      postInline: async (args) => { inlineCalls.push(args); },
+      postIssue: async (body) => { issueCalls.push(body); },
+    });
+    assert.equal(inlineCalls.length, 0);
+    assert.equal(issueCalls.length, 0);
+  });
+});
diff --git a/app/gitea.js b/app/gitea.js
index cba10f2..2442ff7 100644
--- a/app/gitea.js
+++ b/app/gitea.js
@@ -127,3 +127,22 @@ export async function postComment(body) {
   );
   return resp.data;
 }
+
+/**
+ * 在 PR 指定檔案的指定行數發布行內 review comment（標註程式碼位置）。
+ * 透過 Gitea 的 pull reviews API，以 new_position 對應新版檔案的行號。
+ * 若該行不在 diff 範圍內，Gitea 會回傳錯誤，由呼叫端決定是否降級為一般 comment。
+ */
+export async function postPullReviewComment({ path: filePath, line, body }) {
+  const resp = await axios.post(
+    api(`/repos/${GITEA_REPOSITORY}/pulls/${PR_NUMBER}/reviews`),
+    {
+      commit_id: PR_HEAD_SHA || undefined,
+      event: 'COMMENT',
+      body: '',
+      comments: [{ path: filePath, body, new_position: line }],
+    },
+    { headers: headers(GITEA_COMMENT_TOKEN || GITEA_TOKEN), timeout: 30000, httpsAgent },
+  );
+  return resp.data;
+}
diff --git a/app/gitea.test.js b/app/gitea.test.js
index 5ee8e74..8dc7749 100644
--- a/app/gitea.test.js
+++ b/app/gitea.test.js
@@ -1,7 +1,7 @@
 import { describe, it, afterEach, mock } from 'node:test';
 import assert from 'node:assert/strict';
 import axios from 'axios';
-import { getPRDiff, filterDiff, postComment, getCommitMessageBySha, getBranchHeadCommitMessage, shouldSkipBotCommit, getBotReviewOutcome } from './gitea.js';
+import { getPRDiff, filterDiff, postComment, postPullReviewComment, getCommitMessageBySha, getBranchHeadCommitMessage, shouldSkipBotCommit, getBotReviewOutcome } from './gitea.js';
 
 afterEach(() => mock.restoreAll());
 
@@ -57,6 +57,31 @@ describe('gitea', () => {
     await assert.rejects(() => postComment('test'), /api error/);
   });
 
+  it('postPullReviewComment posts an inline review comment to the pulls reviews API', async () => {
+    let capturedUrl, capturedBody, capturedOpts;
+    mock.method(axios, 'post', async (url, body, opts) => {
+      capturedUrl = url;
+      capturedBody = body;
+      capturedOpts = opts;
+      return { data: { id: 7 } };
+    });
+    const result = await postPullReviewComment({ path: 'app/preflight.js', line: 19, body: 'inline body' });
+    assert.deepEqual(result, { id: 7 });
+    assert.ok(capturedUrl.includes('/api/v1/repos/'));
+    assert.ok(capturedUrl.endsWith('/reviews'));
+    assert.equal(capturedBody.event, 'COMMENT');
+    assert.equal(capturedBody.comments.length, 1);
+    assert.equal(capturedBody.comments[0].path, 'app/preflight.js');
+    assert.equal(capturedBody.comments[0].new_position, 19);
+    assert.equal(capturedBody.comments[0].body, 'inline body');
+    assert.ok(capturedOpts.headers['Authorization'].startsWith('token '));
+  });
+
+  it('postPullReviewComment propagates axios errors', async () => {
+    mock.method(axios, 'post', async () => { throw new Error('not in diff'); });
+    await assert.rejects(() => postPullReviewComment({ path: 'a.js', line: 1, body: 'x' }), /not in diff/);
+  });
+
   it('getCommitMessageBySha reads commit message from Gitea API', async () => {
     let capturedUrl;
     mock.method(axios, 'get', async (url) => {