在同时有几个下拉框的情况下,我用了下面的css改变了所有控件的样式。在这个前提下,我想单独更改其中一个下拉框的边框为灰色,请问这个怎么写呢?setTimeout(function(){$(".report-main-parameter-container-controller-combo .bi-border").css({"border-color":"#0091ff","border-radius":"6px","background-color":"#dae9ff"})$(".report-main-parameter-container-controller-combo .bi-text").css({"background":"#ffffff","border-radius":"6px 0px 0px 6px","font-family":"微软雅黑","color":"#98c3ff","font-size":"13px","text-align":"left"})$(".report-main-parameter-container-controller-combo .bi-icon-button").css("color", "#0091ff");},300)