谷歌的UI设计规范核心是Material Design，其要点包括：
设计原则
材质与动效：灵感源于物理世界，通过阴影、层次和自然动效（如重力、摩擦力）增强交互真实感。
无障碍设计：遵循WCAG标准，确保色彩对比度、文本可读性及辅助技术兼容性。
跨设备一致性：适配手机、平板、网页等多种屏幕尺寸。
核心组件
色彩系统：提供主色、辅色及变体，通过对比度（如文本至少15.8:1）提升可读性。
布局与网格：采用响应式网格系统，支持灵活的内容排列。
交互细节：如悬停效果、点击反馈动画及键盘快捷键（如Ctrl+N新建任务）。
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应用场景
深色模式：使用深灰色替代黑色，降低视觉疲劳并节省设备电量。
图标与动效：通过动画传达操作意图（如购物车图标装货动画）。
Material Design不仅影响Android生态，也成为iOS和Windows等平台的参考标准，其开源资源（如设计工具包）便于开发者快速上手。