您可以这样做，并根据您的条件隐藏样式面板

<?xml version="1.0" encoding="UTF-8"?>
<xp:view xmlns:xp="http://www.ibm.com/xsp/core" xmlns:xe="http://www.ibm.com/xsp/coreex">

    <xp:panel tagName="style">
    div.dijitTab:nth-child(1){background-color:red !important}
    </xp:panel>

    <xp:panel style="padding:30px">
    <xe:djTabContainer id="djTabContainer1">
        <xe:djTabPane id="djTabPane1" title="Tab1">1</xe:djTabPane>
        <xe:djTabPane id="djTabPane2" title="Tab2">2</xe:djTabPane>
    </xe:djTabContainer>
    </xp:panel>
</xp:view>