February 2025 monthly summary focused on delivering UX-centered animation refinements across Tencent/tdesign-common and Tencent/tdesign-react. Key features delivered include smoother slide-down transitions and a responsive menu collapse/expand animation, both aligned with the design system and performance goals. While no major bugs were reported, these workstreams reduced transition flicker and improved perceived responsiveness, contributing to higher user satisfaction and smoother onboarding for UI components. Technical achievements include implementing a max-height CSS transition for slide-down enter/leave, and integrating CSSTransition from react-transition-group for robust, accessible menu animations. Technologies demonstrated: CSS transitions, React, CSSTransition, modular commit-based development, design-system alignment, and performance-conscious UI animation.