不可能.您只能使用:visited选择器来更改元素的颜色.因此不透明度不起作用.

Not possible. You can only use the :visited selector to change the color of an element. Thus opacity doesn't work.

SEC7115

:visited和:link样式只能在颜色上有所不同.

:visited and :link styles can only differ by color.

此处引用 -找不到说明它的W3文档.

Reference here - Was unable to find W3 documentation stating it..