diff --git a/.github/workflows/deploy-main.yml b/.github/workflows/deploy-main.yml
new file mode 100644
index 0000000..d661d1c
--- /dev/null
+++ b/.github/workflows/deploy-main.yml
@@ -0,0 +1,42 @@
+name: Deploy Main (root)
+
+on:
+  push:
+    branches: ["main"]
+  workflow_dispatch:
+
+permissions:
+  contents: write
+
+concurrency:
+  group: pages-main
+  cancel-in-progress: true
+
+jobs:
+  build-and-deploy:
+    runs-on: ubuntu-latest
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v4
+
+      - name: Setup Node
+        uses: actions/setup-node@v4
+        with:
+          node-version: "20"
+          cache: "npm"
+
+      - name: Install
+        run: npm ci
+
+      - name: Build
+        run: npm run build
+
+      # 部署到 gh-pages 分支根目錄，但不要清掉 previews
+      - name: Deploy to gh-pages (root)
+        uses: JamesIves/github-pages-deploy-action@v4
+        with:
+          branch: gh-pages
+          folder: dist
+          clean: true
+          clean-exclude: previews/**
+          single-commit: true
diff --git a/.github/workflows/deploy-preview.yml b/.github/workflows/deploy-preview.yml
new file mode 100644
index 0000000..9c639ab
--- /dev/null
+++ b/.github/workflows/deploy-preview.yml
@@ -0,0 +1,41 @@
+name: Deploy Preview (by branch)
+
+on:
+  push:
+    branches-ignore: ["main"]
+  workflow_dispatch:
+
+permissions:
+  contents: write
+
+concurrency:
+  group: pages-preview-${{ github.ref_name }}
+  cancel-in-progress: true
+
+jobs:
+  build-and-deploy:
+    runs-on: ubuntu-latest
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v4
+
+      - name: Setup Node
+        uses: actions/setup-node@v4
+        with:
+          node-version: "20"
+          cache: "npm"
+
+      - name: Install
+        run: npm ci
+
+      - name: Build
+        run: npm run build
+
+      - name: Deploy to gh-pages (preview folder)
+        uses: JamesIves/github-pages-deploy-action@v4
+        with:
+          branch: gh-pages
+          folder: dist
+          target-folder: previews/${{ github.ref_name }}
+          clean: true
+          single-commit: true