diff --git a/docs/QUICK_REF.md b/docs/QUICK_REF.md
index 9b81d7d..d3dc22b 100644
--- a/docs/QUICK_REF.md
+++ b/docs/QUICK_REF.md
@@ -7,7 +7,7 @@
 ## 版本速查
 
 ### 当前版本
-`0.0.5` → 下一目标 `0.1.1` ([M2.1](./M2.md))
+`0.1.1` → 下一目标 `0.1.2` ([M2.2](./M2.md))
 
 ### 模块版本范围
 
diff --git a/docs/README.md b/docs/README.md
index c1abe5f..b4db761 100644
--- a/docs/README.md
+++ b/docs/README.md
@@ -65,9 +65,9 @@ M11.10完成 → 1.0.0 (正式发布)
 
 ## 当前状态
 
-**当前版本**: `0.0.5`  
-**当前进度**: 5/97 (5%)  
-**下一任务**: [M2.1 文本选择检测](./M2.md#m21-文本选择检测--目标版本-011)
+**当前版本**: `0.1.1`  
+**当前进度**: 6/97 (6%)  
+**下一任务**: [M2.2 获取选中文本坐标](./M2.md#m22-获取选中文本坐标--目标版本-0112)
 
 ---
 
diff --git a/docs/VERSION.md b/docs/VERSION.md
index cd510b3..f071ec5 100644
--- a/docs/VERSION.md
+++ b/docs/VERSION.md
@@ -29,7 +29,7 @@
 
 | 任务 | 版本 | 描述 | 状态 | 日期 |
 |------|------|------|------|------|
-| M2.1 | 0.1.1 | 文本选择检测 | ⬜ | - |
+| M2.1 | 0.1.1 | 文本选择检测 | ✅ | 2026-02-09 |
 | M2.2 | 0.1.2 | 获取选中文本坐标 | ⬜ | - |
 | M2.3 | 0.1.3 | 沙拉图标组件 | ⬜ | - |
 | M2.4 | 0.1.4 | 图标定位显示 | ⬜ | - |
diff --git a/manifest.json b/manifest.json
index ded5627..a12439e 100644
--- a/manifest.json
+++ b/manifest.json
@@ -1,7 +1,7 @@
 {
   "manifest_version": 3,
   "name": "沙拉查词",
-  "version": "0.0.5",
+  "version": "0.1.1",
   "description": "聚合词典划词翻译",
   "permissions": [
     "storage",
diff --git a/package.json b/package.json
index 62ce9a6..1df2ad6 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
   "name": "salad-dict",
-  "version": "0.0.5",
+  "version": "0.1.1",
   "description": "聚合词典划词翻译",
   "private": true,
   "type": "module",
diff --git a/src/content/index.js b/src/content/index.js
index 2273416..6248c58 100644
--- a/src/content/index.js
+++ b/src/content/index.js
@@ -1,31 +1,34 @@
 // Content Script
 import { messaging, ping } from '../shared/messaging.js';
+import { initSelectionListener } from './selection.js';
+import { logger } from './logger.js';
 
-console.log('[SaladDict] Content script loaded');
+logger.info('Content script loaded');
+
+// 初始化文本选择监听
+initSelectionListener();
 
 // Ping 测试 - 验证通信链路
 async function testCommunication() {
-  console.log('[SaladDict] Testing communication...');
+  logger.info('Testing communication...');
 
-  // 测试 1: 简单 Ping
   const pingResult = await ping();
-  console.log('[SaladDict] Ping test:', pingResult ? '✅ OK' : '❌ Failed');
+  logger.info('Ping test:', pingResult ? 'OK' : 'Failed');
 
-  // 测试 2: Echo 消息
   try {
     const echoResult = await messaging.sendToBackground('ECHO', { message: 'Hello from content' });
-    console.log('[SaladDict] Echo test:', echoResult);
+    logger.info('Echo test:', echoResult);
   } catch (error) {
-    console.error('[SaladDict] Echo test failed:', error.message);
+    logger.error('Echo test failed:', error.message);
   }
 }
 
-// 延迟执行测试，确保 background 已就绪
+// 延迟执行测试
 setTimeout(testCommunication, 1000);
 
 // 监听来自 Background 的消息
 chrome.runtime.onMessage.addListener((message, sender, sendResponse) => {
-  console.log('[SaladDict] Content received message:', message);
+  logger.info('Content received message:', message);
   sendResponse({ received: true });
   return true;
 });
diff --git a/src/content/logger.js b/src/content/logger.js
new file mode 100644
index 0000000..b11f0b1
--- /dev/null
+++ b/src/content/logger.js
@@ -0,0 +1,20 @@
+/**
+ * @file Content Script 日志工具
+ */
+
+const NAMESPACE = '[SaladDict]';
+
+export const logger = {
+  debug(...args) {
+    console.debug(NAMESPACE, ...args);
+  },
+  info(...args) {
+    console.info(NAMESPACE, ...args);
+  },
+  warn(...args) {
+    console.warn(NAMESPACE, ...args);
+  },
+  error(...args) {
+    console.error(NAMESPACE, ...args);
+  }
+};
diff --git a/src/content/selection.js b/src/content/selection.js
new file mode 100644
index 0000000..db2d48d
--- /dev/null
+++ b/src/content/selection.js
@@ -0,0 +1,59 @@
+/**
+ * @file 文本选择检测
+ * @description 监听网页文本选择事件
+ */
+
+import { logger } from './logger.js';
+
+/**
+ * 获取当前选中的文本
+ * @returns {string} 选中的文本
+ */
+export function getSelectedText() {
+  const selection = window.getSelection();
+  return selection ? selection.toString().trim() : '';
+}
+
+/**
+ * 检查是否有有效文本被选中
+ * @returns {boolean}
+ */
+export function hasSelection() {
+  const text = getSelectedText();
+  return text.length > 0;
+}
+
+/**
+ * 处理鼠标抬起事件
+ * @param {MouseEvent} event
+ */
+function handleMouseUp(event) {
+  // 延迟执行，等待选区完成
+  setTimeout(() => {
+    const selectedText = getSelectedText();
+    
+    if (selectedText.length > 0) {
+      logger.info('Text selected:', selectedText);
+      console.log('[SaladDict] Selected text:', selectedText);
+    }
+  }, 10);
+}
+
+/**
+ * 初始化文本选择监听
+ */
+export function initSelectionListener() {
+  logger.info('Initializing selection listener');
+  
+  document.addEventListener('mouseup', handleMouseUp);
+  
+  logger.info('Selection listener initialized');
+}
+
+/**
+ * 销毁文本选择监听
+ */
+export function destroySelectionListener() {
+  document.removeEventListener('mouseup', handleMouseUp);
+  logger.info('Selection listener destroyed');
+}