x1 y1 x2 y2 预设曲线 linear ease ease-in ease-out ease-in-out easeInCubic easeOutCubic easeInOutCubic easeInBack easeOutBack 动画预览 播放动画 复制代码 分享链接 重置 CSS 代码 transition-timing-function: cubic-bezier(0.25, 0.1, 0.25, 1); linear ease 当前曲线