1. Ask the user for the product/service name and a one-sentence description.
2. Generate a style preview with 57 city-themed cards for the user to choose from.
3. Open an interactive options preview for the user to customize typography, navigation, and color variants.
4. Extract city color tokens based on the user's city choice.
5. Assemble the landing page using pre-built assets and user-selected options.
6. Output the landing page files (index.html, style.css, main.js, assets/).