diff --git a/.gitea/workflows/deploy-pages.yaml b/.gitea/workflows/deploy-pages.yaml
new file mode 100644
index 0000000..fbb23f6
--- /dev/null
+++ b/.gitea/workflows/deploy-pages.yaml
@@ -0,0 +1,65 @@
+name: Deploy to Cloudflare Pages (cobalt)
+
+on:
+  push:
+    branches: ["main", "master"]
+  workflow_dispatch: {}
+
+jobs:
+  build-and-deploy:
+    runs-on: ubuntu-latest
+
+    steps:
+      - name: Checkout
+        uses: https://github.com/actions/checkout@v4
+        # Giteaは絶対URLでの外部Action取得に対応。:contentReference[oaicite:6]{index=6}
+
+      - name: Setup Node for Wrangler
+        uses: https://github.com/actions/setup-node@v4
+        with:
+          node-version: "20"
+
+      - name: Install cobalt (prebuilt)
+        shell: bash
+        run: |
+          if ! command -v curl >/dev/null 2>&1; then
+            (apt-get update && apt-get install -y curl) \
+            || (apk add --no-cache curl) \
+            || (dnf -y install curl) \
+            || (pacman -Sy --noconfirm curl)
+          fi
+          curl -LSfs https://raw.githubusercontent.com/crate-ci/gh-install/master/v1/install.sh \
+            | sh -s -- --git cobalt-org/cobalt.rs --crate cobalt
+          cobalt --version
+        # cobaltのインストール手順（prebuilt）。:contentReference[oaicite:7]{index=7}
+
+      - name: Build site with cobalt
+        run: cobalt build
+        # 既定の出力は ./_site。:contentReference[oaicite:8]{index=8}
+
+      - name: Install Wrangler
+        run: npm i -g wrangler@latest
+
+      - name: Compute BRANCH_NAME
+        id: branch
+        shell: bash
+        run: |
+          bn="${GITHUB_REF_NAME:-${GITEA_REF_NAME:-}}"
+          if [ -z "$bn" ] && [ -n "${GITHUB_REF:-${GITEA_REF:-}}" ]; then
+            ref="${GITHUB_REF:-${GITEA_REF}}"
+            bn="${ref##*/}"
+          fi
+          echo "BRANCH_NAME=$bn" >> "$GITHUB_ENV"
+
+      - name: Deploy to Cloudflare Pages
+        env:
+          CLOUDFLARE_API_TOKEN: ${{ secrets.CLOUDFLARE_API_TOKEN }}
+          CLOUDFLARE_ACCOUNT_ID: ${{ secrets.CLOUDFLARE_ACCOUNT_ID }}
+          CF_PAGES_PROJECT: ${{ vars.CF_PAGES_PROJECT }}
+        run: |
+          test -n "$CF_PAGES_PROJECT"
+          npx wrangler pages deploy "_site" \
+            --project-name "$CF_PAGES_PROJECT" \
+            --account-id "$CLOUDFLARE_ACCOUNT_ID" \
+            --branch "$BRANCH_NAME"
+        # CIでのwrangler deploy手順に準拠。:contentReference[oaicite:9]{index=9}