diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index a15b5a280..140264683 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -9,10 +9,36 @@ env:
   PNPM_VERSION: '10'
 
 jobs:
-  checks:
+  # ==================== 变更检测 ====================
+  changes:
     runs-on: ubuntu-latest
-    timeout-minutes: 30
+    outputs:
+      code: ${{ steps.filter.outputs.code }}
+      docs: ${{ steps.filter.outputs.docs }}
+    steps:
+      - uses: actions/checkout@v4
+      - uses: dorny/paths-filter@v3
+        id: filter
+        with:
+          filters: |
+            code:
+              - 'src/**'
+              - 'e2e/**'
+              - 'package.json'
+              - 'pnpm-lock.yaml'
+              - 'vite.config.ts'
+              - 'vitest.config.ts'
+              - 'playwright.config.ts'
+              - 'tsconfig*.json'
+            docs:
+              - 'docs/**'
+              - '*.md'
+              - '.github/**'
 
+  # ==================== 类型检查 ====================
+  typecheck:
+    runs-on: ubuntu-latest
+    timeout-minutes: 10
     steps:
       - name: Checkout
         uses: actions/checkout@v4
@@ -34,14 +60,120 @@ jobs:
       - name: Type check
         run: pnpm typecheck
 
+  # ==================== 单元测试 ====================
+  test:
+    runs-on: ubuntu-latest
+    timeout-minutes: 10
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v4
+
+      - name: Setup pnpm
+        uses: pnpm/action-setup@v4
+        with:
+          version: ${{ env.PNPM_VERSION }}
+
+      - name: Setup Node.js
+        uses: actions/setup-node@v4
+        with:
+          node-version: ${{ env.NODE_VERSION }}
+          cache: pnpm
+
+      - name: Install dependencies
+        run: pnpm install --frozen-lockfile
+
       - name: Unit tests
         run: pnpm test
 
+  # ==================== 构建检查 ====================
+  build:
+    runs-on: ubuntu-latest
+    timeout-minutes: 10
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v4
+
+      - name: Setup pnpm
+        uses: pnpm/action-setup@v4
+        with:
+          version: ${{ env.PNPM_VERSION }}
+
+      - name: Setup Node.js
+        uses: actions/setup-node@v4
+        with:
+          node-version: ${{ env.NODE_VERSION }}
+          cache: pnpm
+
+      - name: Install dependencies
+        run: pnpm install --frozen-lockfile
+
       - name: Build
         run: pnpm build
 
+  # ==================== E2E 测试（仅代码变更时运行） ====================
+  e2e:
+    needs: changes
+    if: needs.changes.outputs.code == 'true'
+    runs-on: ubuntu-latest
+    timeout-minutes: 15
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v4
+
+      - name: Setup pnpm
+        uses: pnpm/action-setup@v4
+        with:
+          version: ${{ env.PNPM_VERSION }}
+
+      - name: Setup Node.js
+        uses: actions/setup-node@v4
+        with:
+          node-version: ${{ env.NODE_VERSION }}
+          cache: pnpm
+
+      - name: Install dependencies
+        run: pnpm install --frozen-lockfile
+
+      - name: Cache Playwright browsers
+        id: playwright-cache
+        uses: actions/cache@v4
+        with:
+          path: ~/.cache/ms-playwright
+          key: playwright-${{ runner.os }}-${{ hashFiles('pnpm-lock.yaml') }}
+
       - name: Install Playwright browsers
+        if: steps.playwright-cache.outputs.cache-hit != 'true'
         run: pnpm exec playwright install --with-deps chromium
 
+      - name: Install Playwright deps (if cached)
+        if: steps.playwright-cache.outputs.cache-hit == 'true'
+        run: pnpm exec playwright install-deps chromium
+
       - name: E2E smoke (Mobile Chrome)
         run: pnpm e2e e2e/bioforest-chains.spec.ts --project "Mobile Chrome"
+
+  # ==================== 最终状态检查 ====================
+  checks:
+    runs-on: ubuntu-latest
+    needs: [typecheck, test, build, e2e]
+    if: always()
+    steps:
+      - name: Check results
+        run: |
+          if [[ "${{ needs.typecheck.result }}" == "failure" ]]; then
+            echo "Typecheck failed"
+            exit 1
+          fi
+          if [[ "${{ needs.test.result }}" == "failure" ]]; then
+            echo "Tests failed"
+            exit 1
+          fi
+          if [[ "${{ needs.build.result }}" == "failure" ]]; then
+            echo "Build failed"
+            exit 1
+          fi
+          if [[ "${{ needs.e2e.result }}" == "failure" ]]; then
+            echo "E2E failed"
+            exit 1
+          fi
+          echo "All checks passed!"