diff --git a/README.md b/README.md
index d3b2604..4294641 100644
--- a/README.md
+++ b/README.md
@@ -2,4 +2,4 @@
 
 Source code and community space of 📖 _100 Go Mistakes and How to Avoid Them_, published by Manning in August 2022.
 
-Read online: [100go.co](https://100go.co).
\ No newline at end of file
+Read online: [100go.co](https://100go.co).
diff --git a/docs/img/circle.svg b/docs/img/circle.svg
new file mode 100644
index 0000000..5a28f47
--- /dev/null
+++ b/docs/img/circle.svg
@@ -0,0 +1,4 @@
+<svg width="200" height="200" xmlns="http://www.w3.org/2000/svg">
+  <desc>Congratulations! Email me at contact@the*****.cafe with the title "f63dee1e".</desc>
+  <circle cx="100" cy="100" r="50" fill="blue" />
+</svg>
\ No newline at end of file
diff --git a/site/img/circle.svg b/site/img/circle.svg
new file mode 100644
index 0000000..e69de29
diff --git a/site/sitemap.xml b/site/sitemap.xml
index 4fa83ad..660c48d 100644
--- a/site/sitemap.xml
+++ b/site/sitemap.xml
@@ -2,77 +2,77 @@
 <urlset xmlns="http://www.sitemaps.org/schemas/sitemap/0.9">
     <url>
          <loc>https://100go.co/</loc>
-         <lastmod>2024-10-09</lastmod>
+         <lastmod>2024-10-13</lastmod>
          <changefreq>daily</changefreq>
     </url>
     <url>
          <loc>https://100go.co/20-slice/</loc>
-         <lastmod>2024-10-09</lastmod>
+         <lastmod>2024-10-13</lastmod>
          <changefreq>daily</changefreq>
     </url>
     <url>
          <loc>https://100go.co/28-maps-memory-leaks/</loc>
-         <lastmod>2024-10-09</lastmod>
+         <lastmod>2024-10-13</lastmod>
          <changefreq>daily</changefreq>
     </url>
     <url>
          <loc>https://100go.co/5-interface-pollution/</loc>
-         <lastmod>2024-10-09</lastmod>
+         <lastmod>2024-10-13</lastmod>
          <changefreq>daily</changefreq>
     </url>
     <url>
          <loc>https://100go.co/56-concurrency-faster/</loc>
-         <lastmod>2024-10-09</lastmod>
+         <lastmod>2024-10-13</lastmod>
          <changefreq>daily</changefreq>
     </url>
     <url>
          <loc>https://100go.co/89-benchmarks/</loc>
-         <lastmod>2024-10-09</lastmod>
+         <lastmod>2024-10-13</lastmod>
          <changefreq>daily</changefreq>
     </url>
     <url>
          <loc>https://100go.co/9-generics/</loc>
-         <lastmod>2024-10-09</lastmod>
+         <lastmod>2024-10-13</lastmod>
          <changefreq>daily</changefreq>
     </url>
     <url>
          <loc>https://100go.co/92-false-sharing/</loc>
-         <lastmod>2024-10-09</lastmod>
+         <lastmod>2024-10-13</lastmod>
          <changefreq>daily</changefreq>
     </url>
     <url>
          <loc>https://100go.co/98-profiling-execution-tracing/</loc>
-         <lastmod>2024-10-09</lastmod>
+         <lastmod>2024-10-13</lastmod>
          <changefreq>daily</changefreq>
     </url>
     <url>
          <loc>https://100go.co/book/</loc>
-         <lastmod>2024-10-09</lastmod>
+         <lastmod>2024-10-13</lastmod>
          <changefreq>daily</changefreq>
     </url>
     <url>
          <loc>https://100go.co/chapter-1/</loc>
-         <lastmod>2024-10-09</lastmod>
+         <lastmod>2024-10-13</lastmod>
          <changefreq>daily</changefreq>
     </url>
     <url>
          <loc>https://100go.co/external/</loc>
-         <lastmod>2024-10-09</lastmod>
+         <lastmod>2024-10-13</lastmod>
          <changefreq>daily</changefreq>
     </url>
     <url>
          <loc>https://100go.co/ja/</loc>
-         <lastmod>2024-10-09</lastmod>
+         <lastmod>2024-10-13</lastmod>
          <changefreq>daily</changefreq>
     </url>
     <url>
          <loc>https://100go.co/pt-br/</loc>
-         <lastmod>2024-10-09</lastmod>
+         <lastmod>2024-10-13</lastmod>
          <changefreq>daily</changefreq>
     </url>
     <url>
          <loc>https://100go.co/zh/</loc>
-         <lastmod>2024-10-09</lastmod>
+         <lastmod>2024-10-13</lastmod>
          <changefreq>daily</changefreq>
     </url>
 </urlset>
\ No newline at end of file
diff --git a/site/sitemap.xml.gz b/site/sitemap.xml.gz
index d247833..43f7575 100644
Binary files a/site/sitemap.xml.gz and b/site/sitemap.xml.gz differ
diff --git a/site/stylesheets/extra.css b/site/stylesheets/extra.css
index a970fe2..4180724 100644
--- a/site/stylesheets/extra.css
+++ b/site/stylesheets/extra.css
@@ -6,10 +6,3 @@
 .md-typeset details {
   font-size: 15px
 }
-
-.md-announce {
-  background-color: #f0f8ff; /* Light blue background */
-  padding: 10px;
-  border-radius: 5px;
-  color: #333;
-}