单个下拉框默认字体
setTimeout(function(){
$("div[widgetname='COMBOBOX0'] .fr-trigger-texteditor").css('font-weight','bold');//COMBOBOX0是下拉框名称,字体加粗
$("div[widgetname='COMBOBOX0'] .fr-combo-list").css("border", "0.5px solid #E3E6ED").css('border-radius', '2px').css("background", "#ffffff");//下拉框外部边框
},100)