transition 简写属性，用于在一个属性中设置四个过渡属性。 transition-property 规定应用过渡的 CSS 属性的名称。 transition-duration 定义过渡效果花费的时间。默认是 0。 transition-timing-function 规定过渡效果的时间曲线。默认是 "ease"。 transition-delay 规定过渡效果何时开始。默认是 0。 ~~~ /* Apply to 1 property */ /* property name | duration */ transition: margin-right 4s; /* property name | duration | delay */ transition: margin-right 4s 1s; /* property name | duration | timing function */ transition: margin-right 4s ease-in-out; /* property name | duration | timing function | delay */ transition: margin-right 4s ease-in-out 1s; /* Apply to 2 properties */ transition: margin-right 4s, color 1s; /* Apply to all changed properties */ transition: all 0.5s ease-out; /* Global values */ transition: inherit; transition: initial; transition: unset; ~~~