The left, right, and bottom edges do not have a tint applied. + 浅色色调的边缘突显所有元素的顶部边缘。左侧、右侧和底部边缘没有浅色色调。 - Shade darkens the bottom edge of all elements. The left, right, and top edges do not have a shade applied. + 深色色调的边缘使所有元素的底部边缘...