Improve Razor Pages introduction title and content to differentiate from tutorial series (#36003)

* Initial plan

* Update Razor Pages title, intro, and TOC to better differentiate from tutorial series

Co-authored-by: wadepickett <[email protected]>

* Update aspnetcore/razor-pages/index.md

Corrected AI set ms.date

---------

Co-authored-by: copilot-swe-agent[bot] <[email protected]>
Co-authored-by: wadepickett <[email protected]>
Co-authored-by: Wade Pickett <[email protected]>

Author: Copilot

aspnetcore/razor-pages/index.md

@@ -1,14 +1,14 @@
 ---
-title: Introduction to Razor Pages in ASP.NET Core
+title: Razor Pages architecture and concepts in ASP.NET Core
 author: tdykstra
-description: Explains how Razor Pages in ASP.NET Core makes coding page-focused scenarios easier and more productive than using MVC.
+description: Learn the architecture, concepts, and patterns of Razor Pages in ASP.NET Core for building page-focused web applications.
 monikerRange: '>= aspnetcore-3.1'
 ms.author: tdykstra
-ms.date: 8/28/2023
+ms.date: 08/27/2025
 uid: razor-pages/index
 ---
 
-# Introduction to Razor Pages in ASP.NET Core
+# Razor Pages architecture and concepts in ASP.NET Core
 
 By [Rick Anderson](https://twitter.com/RickAndMSFT), [Dave Brock](https://twitter.com/daveabrock), and [Kirk Larkin](https://twitter.com/serpent5)
 
@@ -19,7 +19,7 @@ Razor Pages can make coding page-focused scenarios easier and more productive th
 
 If you're looking for a tutorial that uses the Model-View-Controller approach, see [Get started with ASP.NET Core MVC](xref:tutorials/first-mvc-app/start-mvc).
 
-This document provides an introduction to Razor Pages. It's not a step by step tutorial. If you find some of the sections too advanced, see [Get started with Razor Pages](xref:tutorials/razor-pages/razor-pages-start). For an overview of ASP.NET Core, see the [Introduction to ASP.NET Core](xref:index).
+This article covers the architecture, concepts, and patterns that make Razor Pages effective for building page-focused web applications. It explains how Razor Pages work, their key components, and best practices for implementation. If you prefer hands-on learning with step-by-step instructions, see [Tutorial: Create a Razor Pages web app with ASP.NET Core](xref:tutorials/razor-pages/index). For an overview of ASP.NET Core, see the [Introduction to ASP.NET Core](xref:index).
 
 ## Prerequisites
 

aspnetcore/toc.yml

@@ -326,7 +326,7 @@ items:
         uid: tutorials/choose-web-ui
       - name: Razor Pages
         items:
-          - name: Introduction
+          - name: Architecture and concepts
             uid: razor-pages/index
           - name: Tutorial
             items: