<div id="tpl_header"></div>
<div class="container d-flex flex-grow-1">
    <div class="align-self-center w-100 text-center">
        <div class="text-center display-4 mb-4" i18n="index_title">
            .
        </div>
        <button class="btn btn-primary btn-lg" i18n="index_switch_btn_cn" onclick="app.languageSet('cn');">.</button>
        <button class="btn btn-primary btn-lg" i18n="index_switch_btn_en" onclick="app.languageSet('en');">.</button>
    </div>
</div> 
<div id="tpl_footer"></div>