t>
    <script src="res/class/Icon.js"></script>
    <script src="res/class/EchoLiveTools.js"></script>
    <script src="res/class/EditorConstructor.js"></script>
</head>
<body>
    <main>
        <!-- 标签页标题 -->
        <nav id="echo-editor-nav" class="tabpage-nav" data-navid="main">
            <button
                id="tabpage-nav-import"
                class="tabpage-nav-item"
                data-pageid="import"
                role="tab"
                aria-selected="true"
               