diff --git a/site/blog/app/(web)/components/Theme.tsx b/site/blog/app/(web)/components/Theme.tsx
index ab42762..e616169 100644
--- a/site/blog/app/(web)/components/Theme.tsx
+++ b/site/blog/app/(web)/components/Theme.tsx
@@ -7,11 +7,11 @@ export default function Theme() {
   const isDark = theme === "dark";
 
   return (
-    <a
+    <span
       onClick={() => setTheme(isDark ? "light" : "dark")}
-      className="text-slate-600 dark:text-slate-200 cursor-pointer"
+      className="text-slate-600 dark:text-slate-300 hover:text-slate-800 dark:hover:text-slate-100 cursor-pointer"
     >
       <i className={isDark ? "i-ri:sun-fill" : "i-ri:moon-fill"} />
-    </a>
+    </span>
   );
 }
diff --git a/site/blog/app/middleware.ts b/site/blog/app/middleware.ts
new file mode 100644
index 0000000..d18802d
--- /dev/null
+++ b/site/blog/app/middleware.ts
@@ -0,0 +1,11 @@
+export const config = {
+  matcher: [
+    /*
+     * Match all request paths except for the ones starting with:
+     * - _next/static (static files)
+     * - _next/image (image optimization files)
+     * - favicon.ico, sitemap.xml, robots.txt (metadata files)
+     */
+    "/((?!_next/static|_next/image|favicon.ico|sitemap.xml|robots.txt).*)",
+  ],
+};
diff --git a/site/blog/public/sitemap-a.xml b/site/blog/public/sitemap-a.xml
new file mode 100644
index 0000000..fad32de
--- /dev/null
+++ b/site/blog/public/sitemap-a.xml
@@ -0,0 +1,103 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<urlset xmlns="http://www.sitemaps.org/schemas/sitemap/0.9">
+<url>
+<loc>https://qhan.wang</loc>
+<lastmod>2024-10-12T04:18:52.839Z</lastmod>
+</url>
+<url>
+<loc>https://qhan.wang/posts</loc>
+<lastmod>2024-10-12T04:18:52.839Z</lastmod>
+</url>
+<url>
+<loc>https://qhan.wang/projects</loc>
+<lastmod>2024-10-12T04:18:52.839Z</lastmod>
+</url>
+<url>
+<loc>https://qhan.wang/posts/nginx-websocket</loc>
+<lastmod>2024-08-14T09:47:15.000Z</lastmod>
+</url>
+<url>
+<loc>https://qhan.wang/posts/geometry-calculation</loc>
+<lastmod>2024-08-14T06:54:07.000Z</lastmod>
+</url>
+<url>
+<loc>https://qhan.wang/posts/clipper-lib-guide</loc>
+<lastmod>2024-08-14T06:54:07.000Z</lastmod>
+</url>
+<url>
+<loc>https://qhan.wang/posts/pixijs-custom-cursor</loc>
+<lastmod>2024-08-14T06:54:07.000Z</lastmod>
+</url>
+<url>
+<loc>https://qhan.wang/posts/git-common-commands</loc>
+<lastmod>2024-08-14T06:54:07.000Z</lastmod>
+</url>
+<url>
+<loc>https://qhan.wang/posts/next-unocss</loc>
+<lastmod>2024-08-14T06:54:07.000Z</lastmod>
+</url>
+<url>
+<loc>https://qhan.wang/posts/next-mdx-contentlayer</loc>
+<lastmod>2024-08-14T06:54:07.000Z</lastmod>
+</url>
+<url>
+<loc>https://qhan.wang/posts/next-mdx</loc>
+<lastmod>2024-08-14T06:54:07.000Z</lastmod>
+</url>
+<url>
+<loc>https://qhan.wang/posts/ssr-timezone</loc>
+<lastmod>2024-08-14T06:54:07.000Z</lastmod>
+</url>
+<url>
+<loc>https://qhan.wang/posts/css-gradient-circle</loc>
+<lastmod>2024-08-14T06:54:07.000Z</lastmod>
+</url>
+<url>
+<loc>https://qhan.wang/posts/local-nginx-docker</loc>
+<lastmod>2024-08-14T06:54:07.000Z</lastmod>
+</url>
+<url>
+<loc>https://qhan.wang/posts/dnd-kit-ant-table</loc>
+<lastmod>2024-08-14T06:54:07.000Z</lastmod>
+</url>
+<url>
+<loc>https://qhan.wang/posts/test-playwright-auth</loc>
+<lastmod>2024-08-14T06:54:07.000Z</lastmod>
+</url>
+<url>
+<loc>https://qhan.wang/posts/browser-cache</loc>
+<lastmod>2024-08-14T06:54:07.000Z</lastmod>
+</url>
+<url>
+<loc>https://qhan.wang/posts/css-aspect-ratio</loc>
+<lastmod>2024-08-14T06:54:07.000Z</lastmod>
+</url>
+<url>
+<loc>https://qhan.wang/posts/css-centered</loc>
+<lastmod>2024-08-14T06:54:07.000Z</lastmod>
+</url>
+<url>
+<loc>https://qhan.wang/posts/react-component-lifecycle</loc>
+<lastmod>2024-08-14T06:54:07.000Z</lastmod>
+</url>
+<url>
+<loc>https://qhan.wang/posts/cursor-position</loc>
+<lastmod>2024-08-14T06:54:07.000Z</lastmod>
+</url>
+<url>
+<loc>https://qhan.wang/posts/css-checkbox-beautify</loc>
+<lastmod>2024-08-14T06:54:07.000Z</lastmod>
+</url>
+<url>
+<loc>https://qhan.wang/posts/css-custom-scrollbar</loc>
+<lastmod>2024-08-14T06:54:07.000Z</lastmod>
+</url>
+<url>
+<loc>https://qhan.wang/posts/css-nth-child</loc>
+<lastmod>2024-08-14T06:54:07.000Z</lastmod>
+</url>
+<url>
+<loc>https://qhan.wang/posts/regexp</loc>
+<lastmod>2024-08-14T06:54:07.000Z</lastmod>
+</url>
+</urlset>