diff --git a/README.md b/README.md
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--- a/README.md
+++ b/README.md
@@ -28,7 +28,7 @@
 
 
 <details open>
-<summary><h2>📢 Latest Updates</h2></summary>
+<summary><h3>📢 Latest Updates</h3></summary>
 
  **🔥 Releases:**
 - [**PageIndex Chat**](https://chat.pageindex.ai): The first human-like document-analysis agent [platform](https://chat.pageindex.ai) built for professional long documents. Can also be integrated via [MCP](https://pageindex.ai/mcp) or [API](https://docs.pageindex.ai/quickstart) (beta).
@@ -62,7 +62,7 @@ It simulates how *human experts* navigate and extract knowledge from complex doc
   </a>
 </div>
 
-### 🎯 Features 
+### 🎯 Core Features 
 
 Compared to traditional vector-based RAG, **PageIndex** features:
 - **No Vector DB**: Uses document structure and LLM reasoning for retrieval, instead of vector similarity search.