https://help.fanruan.com/finereport/doc-view-1367.html 参照文档,我找出了下拉项对应的class,有.fr-combo-list\.fr-combo-list-item\.fr-combo-list-item fr-combo-selected。我书写了对应的语句如:$(".fr-combo-list-item fr-combo-selected").css({ "background-color":"rgba(200,0,0,1)", "border": "none", "color": "#e0f1ff" });但是前端并没有什么变化,是里面的css背景元素写错了吗?下图为我对下拉框的修改,能让框变色,但是下拉项没有任何变化