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+# LandPPT Configuration Example
+# Copy this file to .env and configure your settings
+
+# =============================================================================
+# AI Provider Configuration
+# =============================================================================
+
+# Default AI provider to use (openai, anthropic, google, azure_openai, ollama)
+# For production use, configure one of the real AI providers
+DEFAULT_AI_PROVIDER=openai
+
+# Model role overrides (optional)
+DEFAULT_MODEL_PROVIDER=
+DEFAULT_MODEL_NAME=
+OUTLINE_MODEL_PROVIDER=
+OUTLINE_MODEL_NAME=
+CREATIVE_MODEL_PROVIDER=
+CREATIVE_MODEL_NAME=
+IMAGE_PROMPT_MODEL_PROVIDER=
+IMAGE_PROMPT_MODEL_NAME=
+SLIDE_GENERATION_MODEL_PROVIDER=
+SLIDE_GENERATION_MODEL_NAME=
+EDITOR_ASSISTANT_MODEL_PROVIDER=
+EDITOR_ASSISTANT_MODEL_NAME=
+TEMPLATE_GENERATION_MODEL_PROVIDER=
+TEMPLATE_GENERATION_MODEL_NAME=
+
+# OpenAI Configuration
+# Get your API key from: https://platform.openai.com/api-keys
+OPENAI_API_KEY=your_openai_api_key_here
+OPENAI_MODEL=gpt-3.5-turbo
+OPENAI_BASE_URL=https://api.openai.com/v1
+
+# Anthropic Configuration
+# Get your API key from: https://console.anthropic.com/
+ANTHROPIC_API_KEY=your_anthropic_api_key_here
+ANTHROPIC_MODEL=claude-3-haiku-20240307
+
+# Google Gemini Configuration
+# Get your API key from: https://aistudio.google.com/app/apikey
+GOOGLE_API_KEY=your_google_api_key_here
+GOOGLE_BASE_URL=https://generativelanguage.googleapis.com
+GOOGLE_MODEL=gemini-1.5-flash
+
+# Azure OpenAI Configuration
+# Set up Azure OpenAI service and get your credentials
+AZURE_OPENAI_API_KEY=your_azure_openai_key_here
+AZURE_OPENAI_ENDPOINT=https://your-resource.openai.azure.com/
+AZURE_OPENAI_DEPLOYMENT_NAME=your_deployment_name
+AZURE_OPENAI_API_VERSION=2024-02-15-preview
+
+# Ollama Configuration (for local models)
+# Install Ollama from: https://ollama.ai/
+# Then run: ollama pull llama2
+OLLAMA_BASE_URL=http://localhost:11434
+OLLAMA_MODEL=llama2
+
+# Tavily API Configuration (for research functionality)
+# Get your API key from: https://tavily.com/
+TAVILY_API_KEY=your_tavily_api_key_here
+TAVILY_MAX_RESULTS=10
+TAVILY_SEARCH_DEPTH=advanced
+# Optional: Comma-separated domains to include/exclude
+# TAVILY_INCLUDE_DOMAINS=wikipedia.org,arxiv.org
+# TAVILY_EXCLUDE_DOMAINS=example.com
+
+# SearXNG Configuration (for research functionality)
+# SearXNG instance host URL (e.g., http://localhost:8888 or https://searx.example.com)
+SEARXNG_HOST=
+SEARXNG_MAX_RESULTS=10
+SEARXNG_LANGUAGE=auto
+SEARXNG_TIMEOUT=30
+
+# Research Configuration
+# Available providers: tavily, searxng, both
+RESEARCH_PROVIDER=tavily
+# Enable deep content extraction from web pages
+RESEARCH_ENABLE_CONTENT_EXTRACTION=true
+# Maximum content length to extract from each page
+RESEARCH_MAX_CONTENT_LENGTH=5000
+# Timeout for content extraction requests (seconds)
+RESEARCH_EXTRACTION_TIMEOUT=30
+
+# PDF to PPTX Conversion Configuration
+# Apryse SDK License Key for PDF to PowerPoint conversion
+# Get your license key from: https://docs.apryse.com/
+APRYSE_LICENSE_KEY=your_apryse_license_key_here
+
+# SiliconFlow API Configuration (for AI image generation)
+# Get your API key from: https://siliconflow.cn/
+SILICONFLOW_API_KEY=your_siliconflow_api_key_here
+
+# Pixabay API Configuration (for network image search)
+# Get your API key from: https://pixabay.com/api/docs/
+PIXABAY_API_KEY=your_pixabay_api_key_here
+
+# Unsplash API Configuration (for network image search)
+# Get your access key from: https://unsplash.com/developers
+UNSPLASH_ACCESS_KEY=your_unsplash_access_key_here
+
+# Pollinations API Configuration (for AI image generation)
+# Pollinations is a free service, but tokens provide additional features
+POLLINATIONS_API_BASE=https://image.pollinations.ai
+# Optional API token for removing logo and higher limits
+POLLINATIONS_API_TOKEN=your_pollinations_token_here
+# Optional referrer identifier for authentication and analytics
+POLLINATIONS_REFERRER=LandPPT
+# Model selection: flux (default, high quality), turbo (fast), gptimage (supports transparency)
+POLLINATIONS_MODEL=flux
+
+# =============================================================================
+# AI Generation Parameters
+# =============================================================================
+
+# Maximum tokens to generate (adjust based on your needs and costs)
+MAX_TOKENS=8192
+
+# Temperature for generation (0.0 = deterministic, 1.0 = creative)
+TEMPERATURE=0.7
+
+# Top-p sampling parameter (nucleus sampling)
+TOP_P=1.0
+
+# =============================================================================
+# Application Configuration
+# =============================================================================
+
+# Server settings
+HOST=0.0.0.0
+PORT=8000
+DEBUG=false
+RELOAD=false
+
+# Security settings
+SECRET_KEY=your-very-secure-secret-key-change-this-in-production
+ACCESS_TOKEN_EXPIRE_MINUTES=300
+
+# File upload settings
+MAX_FILE_SIZE=10485760
+UPLOAD_DIR=uploads
+
+# Cache settings
+CACHE_TTL=3600
+
+# Database settings (for future use)
+DATABASE_URL=sqlite:///./landppt.db
+
+# =============================================================================
+# Feature Flags
+# =============================================================================
+
+# Enable network mode for enhanced content (future feature)
+ENABLE_NETWORK_MODE=true
+
+# Enable local model support
+ENABLE_LOCAL_MODELS=false
+
+# Enable streaming responses (future feature)
+ENABLE_STREAMING=true
+
+# =============================================================================
+# Image Service Configuration
+# =============================================================================
+
+# Enable image service functionality
+ENABLE_IMAGE_SERVICE=false
+
+# Enable local image hosting
+ENABLE_LOCAL_IMAGES=false
+
+# Enable network image search
+ENABLE_NETWORK_SEARCH=true
+
+# Enable AI image generation
+ENABLE_AI_GENERATION=false
+
+# Smart image selection for local images
+LOCAL_IMAGES_SMART_SELECTION=true
+
+# Enable smart image selection across all sources
+ENABLE_SMART_IMAGE_SELECTION=true
+
+# Maximum images per slide configuration
+MAX_LOCAL_IMAGES_PER_SLIDE=2
+MAX_NETWORK_IMAGES_PER_SLIDE=1
+MAX_AI_IMAGES_PER_SLIDE=2
+MAX_TOTAL_IMAGES_PER_SLIDE=1
+
+# Default providers
+# Available AI image providers: dalle, siliconflow, pollinations
+DEFAULT_AI_IMAGE_PROVIDER=pollinations
+DEFAULT_NETWORK_SEARCH_PROVIDER=pixabay
+
+# SearXNG Configuration
+SEARXNG_HOST=
+
+# AI image generation quality (standard, high)
+AI_IMAGE_QUALITY=standard
+
+# =============================================================================
+# Logging Configuration
+# =============================================================================
+
+# Log level (DEBUG, INFO, WARNING, ERROR)
+LOG_LEVEL=INFO
+
+# Log AI requests and responses (be careful with sensitive data)
+# Set to true only for debugging, false for production
+LOG_AI_REQUESTS=false
+