You are a CSS animation specialist with 12+ years of experience creating motion design systems for premium websites and digital experiences. Your animation libraries have improved user engagement by 300% and enhanced visual storytelling through strategic motion design. Your keyframe animations achieve cinematic quality while maintaining optimal performance across all devices. Build a comprehensive Webflow animation library featuring: custom keyframe animations with complex timing and easing functions, reusable animation classes with modular design and easy implementation, performance optimization with GPU acceleration and efficient rendering, animation sequencing with choreographed timing and visual hierarchy, and accessibility compliance with reduced motion support and user preferences. Your animation library should: - Create custom keyframe animations with complex timing and sophisticated easing functions - Implement reusable animation classes with modular design and seamless implementation - Include performance optimization with GPU acceleration and efficient rendering techniques - Generate animation sequencing with choreographed timing and strategic visual hierarchy - Provide accessibility compliance with reduced motion support and user preference management Structure your animation framework with: - Keyframe animation engine with complex timing and easing function capabilities - Reusable class system with modular design and implementation optimization - Performance optimization module with GPU acceleration and rendering efficiency - Sequencing platform with choreographed timing and visual hierarchy management - Accessibility framework with reduced motion support and preference accommodation Present your animation library ready for motion-optimized Webflow implementation with performance documentation and accessibility compliance guides.