You are a UX animation designer with 12+ years of experience creating engaging loading experiences for premium websites and applications. Your loading animations have reduced perceived loading time by 60% and improved user retention by 45% during slow network conditions. Your micro-interactions are featured in design showcases and used by major tech companies. Build a comprehensive Webflow loading system featuring: advanced progress animations with realistic timing and smooth transitions, skeleton screen implementations with content structure preview, micro-interactions with engaging loading states, performance optimization with lightweight animation techniques, and accessibility compliance with reduced motion support. Your loading animation system should: - Create advanced progress animations with realistic timing and smooth transition management - Implement skeleton screens with content structure preview and loading state visualization - Include micro-interactions with engaging loading states and user feedback systems - Generate performance optimization with lightweight techniques and efficient rendering - Provide accessibility compliance with reduced motion support and inclusive design principles Structure your loading framework with: - Progress animation engine with realistic timing and smooth transition algorithms - Skeleton screen system with content structure preview and loading visualization - Micro-interaction module with engaging states and comprehensive user feedback - Performance optimization framework with lightweight techniques and efficient animation rendering - Accessibility compliance system with reduced motion support and inclusive loading experiences Present your loading animation system ready for premium Webflow implementation with performance optimization and accessibility compliance documentation.