Key Features:

1. Hybrid Results Engine: Combines traditional web search results fetched from Google Programmable Search Engine (CSE) with direct, AI-generated answers powered by the DeepSeek AI model.
2. AI Q&A Integration:
   • Features asynchronously loaded answers from DeepSeek AI
   • Includes a dedicated Q&A page allowing users to interact directly with the DeepSeek AI
3. Robust Google CSE Functionality:
   • Utilizes the Google Custom Search JSON API for retrieving web results.
   • Implements automatic API key rotation (configured for 2 keys in config.php) to distribute API usage.
   • Supports pagination for navigating through search results.
   • Displays search result statistics (approximate count and query time).
4. Intelligent Language Support:
   • Automatically detects the user's region via IP address
   • Serves the interface in Chinese (zh) for users from Mainland China and English (en) for users from other regions by default.
   • Language strings are managed centrally in the lang/ directory for easy modification or extension.
5. Flexible Advertising System:
   • Provides three pre-defined ad slots: index page footer, search results sidebar, and below the content on the DeepSeek Q&A page.
   • A global ADS_ENABLED constant in config.php controls ad visibility.
   • Ad code snippets (like AdSense) are stored in separate .html files within the ads/ directory
   • The ads.php script dynamically includes the appropriate ad code file based on the requested slot.
6. Modern Frontend Design:
   • The homepage features a layout with the logo, search bar, and button vertically and horizontally centered using Flexbox (styles are inline in index.php).
   • Utilizes a unified header and footer across relevant pages
   • Includes basic responsive CSS rules to adapt the layout for various screen sizes (desktop, tablet, mobile).
7. Modularity and Configurability:
   • Centralizes core settings like Site Title, API Keys, Ad preferences, etc., in config.php.
   • Provides a temporary install.php script for convenient initial web-based configuration of config.php and ad code files (must be deleted after use for security).
   • Features a clear code structure separating core logic, configuration, language files, and static assets.
8. Technology Stack: Built primarily with PHP and HTML/CSS/JavaScript. Recommends using cURL for robust external API communication (Google CSE, DeepSeek, IP Geolocation).