ss="page">
<div class="root">
    <div class="container-shell">
        <div id="container"></div>
        <div class="input">
            <button onclick="updateSplit(1)">1*1</button>
            <button onclick="updateSplit(2)">2*2</button>
            <button onclick="updateSplit(3)">3*3</button>
            <button onclick="updateSplit(4)">4*4</button>
        </div>
        <div class="input">
            <div>输入URL：</div>
            <input
                autocomplete="on"
       