diff --git a/.vscode/launch.json b/.vscode/launch.json
new file mode 100644
index 0000000..6d729cb
--- /dev/null
+++ b/.vscode/launch.json
@@ -0,0 +1,18 @@
+{
+    // 使用 IntelliSense 了解相关属性。 
+    // 悬停以查看现有属性的描述。
+    // 欲了解更多信息，请访问: https://go.microsoft.com/fwlink/?linkid=830387
+    "version": "0.2.0",
+    "configurations": [
+
+        {
+            "type": "node",
+            "request": "launch",
+            "name": "同步数据库",
+            "skipFiles": [
+                "<node_internals>/**"
+            ],
+            "program": "${workspaceFolder}\\server\\scripts\\db_sync.js"
+        }
+    ]
+}
\ No newline at end of file
diff --git a/server/.env.example b/server/.env.example
deleted file mode 100644
index e305bfe..0000000
--- a/server/.env.example
+++ /dev/null
@@ -1,15 +0,0 @@
-# MySQL
-MYSQL_HOST=127.0.0.1
-MYSQL_PORT=3306
-MYSQL_USER=root
-MYSQL_PASSWORD=
-MYSQL_DATABASE=ecom_crawl
-
-# 扩展目录（未打包，含 manifest.json）
-CRX_SRC_PATH=d:/项目/电商抓取项目/mv2_simple_crx/src
-
-SERVER_PORT=38080
-ACTION_TIMEOUT_MS=300000
-PUPPETEER_HEADLESS=false
-# 可选：指定浏览器路径（不填默认用 ../chrome-win/chrome.exe）
-CHROME_EXECUTABLE_PATH=
diff --git a/server/app.js b/server/app.js
index 25b7f80..1ffb267 100644
--- a/server/app.js
+++ b/server/app.js
@@ -1,4 +1,4 @@
-import dotenv from 'dotenv';
+import { get_app_config } from './config/app_config.js';
 import Koa from 'koa';
 import body_parser from 'koa-bodyparser';
 
@@ -6,8 +6,6 @@ import { sequelize } from './models/index.js';
 import { crawl_router } from './routes/crawl.js';
 import { start_all_cron_tasks } from './services/schedule_loader.js';
 
-dotenv.config();
-
 const app = new Koa();
 app.use(body_parser({ jsonLimit: '10mb' }));
 
@@ -18,7 +16,8 @@ app.use(async (ctx) => {
   ctx.body = { ok: false, error: 'not_found' };
 });
 
-const port = Number(process.env.SERVER_PORT || 38080);
+const cfg = get_app_config();
+const port = cfg.server.port;
 
 await sequelize.authenticate();
 await sequelize.sync();
diff --git a/server/config/app_config.js b/server/config/app_config.js
new file mode 100644
index 0000000..a7cf102
--- /dev/null
+++ b/server/config/app_config.js
@@ -0,0 +1,63 @@
+import path from 'node:path';
+import { fileURLToPath } from 'node:url';
+import { get_env } from './env.js';
+
+function must_get(key) {
+  const v = get_env(key);
+  if (v === undefined || v === null || v === '') {
+    throw new Error(`缺少配置 ${key}`);
+  }
+  return v;
+}
+
+function get_bool(key, default_value) {
+  const v = get_env(key);
+  if (v === undefined || v === null || v === '') {
+    return default_value;
+  }
+  return String(v).toLowerCase() === 'true';
+}
+
+function get_int(key, default_value) {
+  const v = get_env(key);
+  if (v === undefined || v === null || v === '') {
+    return default_value;
+  }
+  const n = Number(v);
+  if (Number.isNaN(n)) {
+    throw new Error(`配置 ${key} 必须是数字`);
+  }
+  return n;
+}
+
+let cached = null;
+
+export function get_app_config() {
+  if (cached) {
+    return cached;
+  }
+
+  const __filename = fileURLToPath(import.meta.url);
+  const __dirname = path.dirname(__filename);
+
+  cached = {
+    mysql: {
+      host: must_get('MYSQL_HOST'),
+      port: get_int('MYSQL_PORT', 3306),
+      user: must_get('MYSQL_USER'),
+      password: must_get('MYSQL_PASSWORD'),
+      database: must_get('MYSQL_DATABASE')
+    },
+    server: {
+      port: get_int('SERVER_PORT', 38080)
+    },
+    crawler: {
+      crx_src_path: must_get('CRX_SRC_PATH'),
+      action_timeout_ms: get_int('ACTION_TIMEOUT_MS', 300000),
+      puppeteer_headless: get_bool('PUPPETEER_HEADLESS', false),
+      chrome_executable_path: (get_env('CHROME_EXECUTABLE_PATH') || '').trim() || path.resolve(__dirname, '../../chrome-win/chrome.exe')
+    }
+  };
+
+  return cached;
+}
diff --git a/server/config/database.js b/server/config/database.js
index b1322b5..2edf05f 100644
--- a/server/config/database.js
+++ b/server/config/database.js
@@ -1,14 +1,14 @@
-import dotenv from 'dotenv';
-
-dotenv.config();
+import { get_app_config } from './app_config.js';
 
 export function get_sequelize_options() {
+  const cfg = get_app_config();
+
   return {
-    host: process.env.MYSQL_HOST || '127.0.0.1',
-    port: Number(process.env.MYSQL_PORT || 3306),
-    username: process.env.MYSQL_USER || 'root',
-    password: process.env.MYSQL_PASSWORD || '',
-    database: process.env.MYSQL_DATABASE || 'ecom_crawl',
+    host: cfg.mysql.host,
+    port: cfg.mysql.port,
+    username: cfg.mysql.user,
+    password: cfg.mysql.password,
+    database: cfg.mysql.database,
     dialect: 'mysql',
     logging: false,
     define: {
diff --git a/server/config/env.js b/server/config/env.js
new file mode 100644
index 0000000..c7ab09d
--- /dev/null
+++ b/server/config/env.js
@@ -0,0 +1,74 @@
+import fs from 'node:fs';
+import path from 'node:path';
+import { fileURLToPath } from 'node:url';
+
+let loaded = false;
+let env_map = {};
+
+function unquote(value) {
+  const v = String(value);
+  if ((v.startsWith('"') && v.endsWith('"')) || (v.startsWith("'") && v.endsWith("'"))) {
+    return v.slice(1, -1);
+  }
+  return v;
+}
+
+function parse_env_text(text) {
+  const out = {};
+  const lines = String(text).split(/\r?\n/);
+
+  for (const raw_line of lines) {
+    const line = raw_line.trim();
+    if (!line) continue;
+    if (line.startsWith('#')) continue;
+
+    const idx = line.indexOf('=');
+    if (idx <= 0) continue;
+
+    const key = line.slice(0, idx).trim();
+    let value = line.slice(idx + 1).trim();
+
+    // 去掉行尾注释：仅在未被引号包裹时生效
+    const quoted = (value.startsWith('"') && value.endsWith('"')) || (value.startsWith("'") && value.endsWith("'"));
+    if (!quoted) {
+      const sharp = value.indexOf('#');
+      if (sharp >= 0) {
+        value = value.slice(0, sharp).trim();
+      }
+    }
+
+    out[key] = unquote(value);
+  }
+
+  return out;
+}
+
+export function load_env() {
+  if (loaded) {
+    return;
+  }
+
+  const __filename = fileURLToPath(import.meta.url);
+  const __dirname = path.dirname(__filename);
+  const env_path = path.resolve(__dirname, '../.env');
+
+  const text = fs.readFileSync(env_path, 'utf8');
+  env_map = parse_env_text(text);
+  loaded = true;
+}
+
+export function get_env(key) {
+  if (!loaded) {
+    load_env();
+  }
+  return env_map[key];
+}
+
+export function get_all_env() {
+  if (!loaded) {
+    load_env();
+  }
+  return { ...env_map };
+}
+
+load_env();
diff --git a/server/models/schedule_task.js b/server/models/schedule_task.js
deleted file mode 100644
index 0266733..0000000
--- a/server/models/schedule_task.js
+++ /dev/null
@@ -1 +0,0 @@
-// 已废弃：按需求改为写死定时任务（见 config/cron_tasks.js）
diff --git a/server/package-lock.json b/server/package-lock.json
index e863dcf..fd8d24d 100644
--- a/server/package-lock.json
+++ b/server/package-lock.json
@@ -9,7 +9,6 @@
       "version": "1.0.0",
       "dependencies": {
         "@koa/router": "^12.0.1",
-        "dotenv": "^16.4.5",
         "koa": "^2.15.3",
         "koa-bodyparser": "^4.4.1",
         "mysql2": "^3.11.0",
@@ -650,18 +649,6 @@
       "integrity": "sha512-XxtPuC3PGakY6PD7dG66/o8KwJ/LkH2/EKe19Dcw58w53dv4/vSQEkn/SzuyhHE2q4zPgCkxQBxus3VV4ql+Pg==",
       "license": "BSD-3-Clause"
     },
-    "node_modules/dotenv": {
-      "version": "16.6.1",
-      "resolved": "https://registry.npmmirror.com/dotenv/-/dotenv-16.6.1.tgz",
-      "integrity": "sha512-uBq4egWHTcTt33a72vpSG0z3HnPuIl6NqYcTrKEg2azoEyl2hpW0zqlxysq2pK9HlDIHyHyakeYaYnSAwd8bow==",
-      "license": "BSD-2-Clause",
-      "engines": {
-        "node": ">=12"
-      },
-      "funding": {
-        "url": "https://dotenvx.com"
-      }
-    },
     "node_modules/dottie": {
       "version": "2.0.7",
       "resolved": "https://registry.npmmirror.com/dottie/-/dottie-2.0.7.tgz",
diff --git a/server/package.json b/server/package.json
index 834df29..222dc40 100644
--- a/server/package.json
+++ b/server/package.json
@@ -9,7 +9,6 @@
   },
   "dependencies": {
     "@koa/router": "^12.0.1",
-    "dotenv": "^16.4.5",
     "koa": "^2.15.3",
     "koa-bodyparser": "^4.4.1",
     "mysql2": "^3.11.0",
diff --git a/server/routes/schedule_task.js b/server/routes/schedule_task.js
deleted file mode 100644
index 0266733..0000000
--- a/server/routes/schedule_task.js
+++ /dev/null
@@ -1 +0,0 @@
-// 已废弃：按需求改为写死定时任务（见 config/cron_tasks.js）
diff --git a/server/services/cron_manager.js b/server/services/cron_manager.js
deleted file mode 100644
index 0266733..0000000
--- a/server/services/cron_manager.js
+++ /dev/null
@@ -1 +0,0 @@
-// 已废弃：按需求改为写死定时任务（见 config/cron_tasks.js）
diff --git a/server/services/puppeteer_runner.js b/server/services/puppeteer_runner.js
index 617fad6..5d9b223 100644
--- a/server/services/puppeteer_runner.js
+++ b/server/services/puppeteer_runner.js
@@ -1,22 +1,18 @@
-import dotenv from 'dotenv';
 import fs from 'node:fs';
 import path from 'node:path';
 import puppeteer from 'puppeteer';
-
-dotenv.config();
+import { get_app_config } from '../config/app_config.js';
 
 let browser_singleton = null;
 
 function get_action_timeout_ms() {
-  return Number(process.env.ACTION_TIMEOUT_MS || 300000);
+  const cfg = get_app_config();
+  return cfg.crawler.action_timeout_ms;
 }
 
 function get_crx_src_path() {
-  const crx_src_path = process.env.CRX_SRC_PATH;
-  if (!crx_src_path) {
-    throw new Error('缺少环境变量 CRX_SRC_PATH');
-  }
-  return crx_src_path;
+  const cfg = get_app_config();
+  return cfg.crawler.crx_src_path;
 }
 
 function get_extension_id_from_targets(targets) {
@@ -52,15 +48,8 @@ async function wait_for_extension_id(browser, timeout_ms) {
 }
 
 function get_chrome_executable_path() {
-  // 优先环境变量，方便你后续切换版本
-  const from_env = process.env.CHROME_EXECUTABLE_PATH;
-  if (from_env) {
-    return path.resolve(from_env);
-  }
-
-  // 默认使用项目根目录的 chrome-win/chrome.exe
-  // 当前进程 cwd 通常是 server/，所以回到上一级
-  return path.resolve(process.cwd(), '../chrome-win/chrome.exe');
+  const cfg = get_app_config();
+  return path.resolve(cfg.crawler.chrome_executable_path);
 }
 
 export async function get_or_create_browser() {
@@ -79,8 +68,9 @@ export async function get_or_create_browser() {
     throw new Error(`扩展 manifest.json 不存在: ${manifest_path}`);
   }
 
+  const cfg = get_app_config();
   const extension_path = raw_extension_path.replace(/\\/g, '/');
-  const headless = String(process.env.PUPPETEER_HEADLESS || 'false') === 'true';
+  const headless = cfg.crawler.puppeteer_headless;
   const user_data_dir = path.resolve(process.cwd(), 'puppeteer_profile');
 
   browser_singleton = await puppeteer.launch({