diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
new file mode 100644
index 0000000..8a3d183
--- /dev/null
+++ b/.github/workflows/ci.yml
@@ -0,0 +1,57 @@
+name: CI
+
+on:
+  push:
+    branches: [main]
+  pull_request:
+
+jobs:
+  backend:
+    name: Backend (go vet + test)
+    runs-on: ubuntu-latest
+    defaults:
+      run:
+        working-directory: server
+    steps:
+      - uses: actions/checkout@v4
+
+      - uses: actions/setup-go@v5
+        with:
+          go-version-file: server/go.mod
+          cache-dependency-path: server/go.sum
+
+      - name: Go module download
+        run: go mod download
+
+      - name: go vet
+        run: go vet ./...
+
+      - name: go test
+        run: go test ./... -count=1
+
+  frontend:
+    name: Frontend (typecheck + lint + build)
+    runs-on: ubuntu-latest
+    defaults:
+      run:
+        working-directory: web
+    steps:
+      - uses: actions/checkout@v4
+
+      - uses: actions/setup-node@v4
+        with:
+          node-version: 20
+          cache: npm
+          cache-dependency-path: web/package-lock.json
+
+      - name: Install dependencies
+        run: npm ci
+
+      - name: Typecheck
+        run: npx tsc -b --force
+
+      - name: Lint
+        run: npm run lint
+
+      - name: Build
+        run: npm run build
diff --git a/.gitignore b/.gitignore
index 6b954ea..79e1ef3 100644
--- a/.gitignore
+++ b/.gitignore
@@ -14,3 +14,6 @@ server/bin/
 *.exe
 *.test
 .codex_artifacts/
+
+# 测试证据截图（本地保留，不入库）
+gui-test-screenshots/