diff --git a/.github/workflows/pages-ci.yml b/.github/workflows/pages-ci.yml
index 4e25ba2e..1e4ffac3 100644
--- a/.github/workflows/pages-ci.yml
+++ b/.github/workflows/pages-ci.yml
@@ -29,6 +29,10 @@ jobs:
         working-directory: pages
         run: npm install
 
+      - name: Lint
+        working-directory: pages
+        run: npm run lint
+
       - name: Typecheck
         working-directory: pages
         run: npm run typecheck
@@ -36,3 +40,7 @@ jobs:
       - name: Build
         working-directory: pages
         run: npm run build
+
+      - name: Check bundle size
+        working-directory: pages
+        run: npm run size
diff --git a/pages/eslint.config.js b/pages/eslint.config.js
new file mode 100644
index 00000000..4fd7ba2f
--- /dev/null
+++ b/pages/eslint.config.js
@@ -0,0 +1,22 @@
+import js from "@eslint/js";
+import tseslint from "typescript-eslint";
+import reactHooks from "eslint-plugin-react-hooks";
+
+export default tseslint.config(
+  js.configs.recommended,
+  ...tseslint.configs.recommended,
+  {
+    plugins: { "react-hooks": reactHooks },
+    rules: {
+      ...reactHooks.configs.recommended.rules,
+      "react-hooks/set-state-in-effect": "off",
+      "no-empty": ["error", { allowEmptyCatch: true }],
+      "@typescript-eslint/no-explicit-any": "off",
+      "@typescript-eslint/no-unused-vars": [
+        "warn",
+        { argsIgnorePattern: "^_", varsIgnorePattern: "^_" },
+      ],
+    },
+  },
+  { ignores: ["dist/", "node_modules/", "*.cjs"] }
+);
diff --git a/pages/package.json b/pages/package.json
index 6a058129..c9ffceb4 100644
--- a/pages/package.json
+++ b/pages/package.json
@@ -2,10 +2,13 @@
   "name": "open-code-review-landing",
   "version": "1.0.0",
   "description": "Landing page for Open Code Review",
+  "type": "module",
   "scripts": {
     "dev": "webpack serve",
     "build": "NODE_ENV=production webpack --mode production",
-    "typecheck": "tsc --noEmit"
+    "typecheck": "tsc --noEmit",
+    "lint": "eslint src/",
+    "size": "size-limit"
   },
   "dependencies": {
     "@agentscope-ai/icons": "^1.0.68",
@@ -20,11 +23,19 @@
   "overrides": {
     "fast-uri": "^3.1.2"
   },
+  "size-limit": [
+    {
+      "path": "dist/*.bundle.js",
+      "limit": "150 kB"
+    }
+  ],
   "devDependencies": {
     "@babel/core": "^7.23.5",
     "@babel/preset-env": "^7.29.5",
     "@babel/preset-react": "^7.23.5",
     "@babel/preset-typescript": "^7.23.3",
+    "@eslint/js": "^10.0.1",
+    "@size-limit/file": "^13.0.1",
     "@types/dompurify": "^3.0.5",
     "@types/react": "^18.2.0",
     "@types/react-dom": "^18.2.0",
@@ -33,12 +44,16 @@
     "babel-loader": "^9.1.3",
     "copy-webpack-plugin": "^14.0.0",
     "css-loader": "^6.8.1",
+    "eslint": "^10.8.0",
+    "eslint-plugin-react-hooks": "^7.1.1",
     "html-webpack-plugin": "^5.5.3",
     "postcss": "^8.5.15",
     "postcss-loader": "^7.3.3",
+    "size-limit": "^13.0.1",
     "style-loader": "^3.3.3",
     "tailwindcss": "^3.3.5",
     "typescript": "^5.3.2",
+    "typescript-eslint": "^8.65.0",
     "webpack": "^5.89.0",
     "webpack-cli": "^5.1.4",
     "webpack-dev-server": "^5.2.4"
diff --git a/pages/postcss.config.js b/pages/postcss.config.cjs
similarity index 52%
rename from pages/postcss.config.js
rename to pages/postcss.config.cjs
index 5cbc2c7d..d9f53532 100644
--- a/pages/postcss.config.js
+++ b/pages/postcss.config.cjs
@@ -1,6 +1,6 @@
 module.exports = {
   plugins: {
-    tailwindcss: {},
+    tailwindcss: { config: './tailwind.config.cjs' },
     autoprefixer: {}
   }
 };
diff --git a/pages/src/content/blog/index.ts b/pages/src/content/blog/index.ts
index 41786035..6512cf08 100644
--- a/pages/src/content/blog/index.ts
+++ b/pages/src/content/blog/index.ts
@@ -113,7 +113,7 @@ export function searchBlog(query: string, language: string): { slug: BlogSlug; t
     const lowerTitle = meta.title.toLowerCase();
     const lowerSummary = (meta.summary || '').toLowerCase();
 
-    let snippet = '';
+    let snippet: string;
     const contentIdx = lowerContent.indexOf(lowerQuery);
     if (lowerTitle.includes(lowerQuery)) {
       snippet = meta.title;
@@ -122,7 +122,7 @@ export function searchBlog(query: string, language: string): { slug: BlogSlug; t
     } else if (contentIdx !== -1) {
       const start = Math.max(0, contentIdx - 30);
       const end = Math.min(content.length, contentIdx + query.length + 60);
-      snippet = content.slice(start, end).replace(/[#*_`\[\]()]/g, '').replace(/\n/g, ' ').trim();
+      snippet = content.slice(start, end).replace(/[#*_`[\]()]/g, '').replace(/\n/g, ' ').trim();
       if (start > 0) snippet = '...' + snippet;
       if (end < content.length) snippet = snippet + '...';
     } else {
diff --git a/pages/src/content/docs/index.ts b/pages/src/content/docs/index.ts
index 676c549a..a54bfdc8 100644
--- a/pages/src/content/docs/index.ts
+++ b/pages/src/content/docs/index.ts
@@ -198,7 +198,7 @@ export function searchDocs(query: string, language: string): { slug: DocSlug; ti
       // Extract snippet around match
       const start = Math.max(0, idx - 30);
       const end = Math.min(content.length, idx + query.length + 60);
-      let snippet = content.slice(start, end).replace(/[#*_`\[\]()]/g, '').replace(/\n/g, ' ').trim();
+      let snippet = content.slice(start, end).replace(/[#*_`[\]()]/g, '').replace(/\n/g, ' ').trim();
       if (start > 0) snippet = '...' + snippet;
       if (end < content.length) snippet = snippet + '...';
       const title = getDocTitle(slug, language);
diff --git a/pages/src/utils/extractHeadings.ts b/pages/src/utils/extractHeadings.ts
index 567a2210..4b745708 100644
--- a/pages/src/utils/extractHeadings.ts
+++ b/pages/src/utils/extractHeadings.ts
@@ -17,7 +17,7 @@ export function extractHeadings(markdown: string): { id: string; text: string; l
       // Strip markdown link syntax [text](url) → text, then strip other formatting
       const text = match[2]
         .replace(/\[([^\]]+)]\([^)]*\)/g, '$1')
-        .replace(/[`*_\[\]()]/g, '')
+        .replace(/[`*_[\]()]/g, '')
         .trim();
       const id = generateHeadingId(text);
       headings.push({ id, text, level });
diff --git a/pages/src/utils/headingId.ts b/pages/src/utils/headingId.ts
index 779ffd7e..c28d601b 100644
--- a/pages/src/utils/headingId.ts
+++ b/pages/src/utils/headingId.ts
@@ -10,7 +10,7 @@ export function generateHeadingId(text: string): string {
   // bypassed by nested tags). Keeps text content, decodes HTML entities so the
   // TOC side (raw markdown) and renderer side (marked HTML output) agree.
   const plain = DOMPurify.sanitize(text, { ALLOWED_TAGS: [], ALLOWED_ATTR: [] })
-    .replace(/[`*_\[\]()]/g, '')
+    .replace(/[`*_[\]()]/g, '')
     .trim();
   return plain.toLowerCase().replace(/[^a-z0-9\u4e00-\u9fff]+/g, '-').replace(/^-|-$/g, '');
 }
diff --git a/pages/tailwind.config.js b/pages/tailwind.config.cjs
similarity index 100%
rename from pages/tailwind.config.js
rename to pages/tailwind.config.cjs
diff --git a/pages/webpack.config.js b/pages/webpack.config.cjs
similarity index 100%
rename from pages/webpack.config.js
rename to pages/webpack.config.cjs