Enhance documentation home page with VitePress hero layout

Co-authored-by: hotlong <50353452+hotlong@users.noreply.github.com>

Author: Copilot

docs/index.md

@@ -1,18 +1,59 @@
-# ObjectQL Documentation
+---
+layout: home
+
+hero:
+  name: ObjectQL
+  text: One Protocol, Any Database, AI-Ready
+  tagline: A universal data query engine for the modern stack. Write your logic once in JSON-DSL, run it seamlessly on MongoDB or PostgreSQL.
+  image:
+    src: /logo.svg
+    alt: ObjectQL Logo
+  actions:
+    - theme: brand
+      text: Get Started
+      link: /guide/
+    - theme: alt
+      text: View on GitHub
+      link: https://github.com/objectql/objectql
+
+features:
+  - icon: 🚀
+    title: Dual-Stack Engine
+    details: Native performance for schema-less MongoDB and first-class support for PostgreSQL, MySQL, and SQLite with a unique "Core Columns + JSONB" strategy.
+  - icon: 🤖
+    title: AI-Native Protocol
+    details: Queries defined as standardized JSON ASTs, optimized for LLMs to understand schema and generate accurate, safe business logic without hallucinating SQL syntax.
+  - icon: ⚡
+    title: Modern & Lightweight
+    details: Written in 100% TypeScript with zero heavy legacy dependencies. Promise-based asynchronous API with no runtime requirements beyond Node.js.
+  - icon: 🔌
+    title: Pluggable Architecture
+    details: Core logic completely decoupled from storage drivers. Easily extensible to support other data sources like REST APIs, GraphQL, or SQLite.
+  - icon: 📖
+    title: Comprehensive Documentation
+    details: Detailed guides for developers and comprehensive protocol specifications for system integrators and driver contributors.
+  - icon: 🛡️
+    title: Production Ready
+    details: Built-in security features, transaction support, and optimized queries for both development flexibility and production reliability.
+---
+
+## Documentation Overview
 
 We have organized the documentation into two main categories:
 
-## 1. [User & Developer Guide](./guide/)
+### [User & Developer Guide](/guide/)
 **Target Audience**: Application Developers, Customer Success, End Users.
-**Content**:
-*   How to model data (Objects, Fields, Relationships).
-*   How to write business logic (Hooks, Actions).
-*   Using the Node.js SDK.
-*   Security configuration.
 
-## 2. [Protocol Specifications](./spec/)
+Learn how to build applications using ObjectQL:
+- Data modeling (Objects, Fields, Relationships)
+- Writing business logic (Hooks, Actions)
+- Using the Node.js SDK
+- Security configuration
+
+### [Protocol Specifications](/spec/)
 **Target Audience**: System Architects, Driver Contributors, Integrators.
-**Content**:
-*   Metadata File Format Specification (YAML/JSON schema).
-*   Unified Query Language Protocol.
-*   Low-level HTTP API Reference.
+
+Understand the low-level protocols:
+- Metadata File Format Specification (YAML/JSON schema)
+- Unified Query Language Protocol
+- HTTP API Reference