分屏的关闭事件，相关样式调整

shuishen

2021-06-04 a239631f7bbd0c17037c31d3fcb04504ab317c51

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<div>
    <div class="left-navigation-bar-but">
        <img src="../../images/addL/xzuo.png" alt="">
    </div>
    <div class="left-navigation-bar-main">
 
    </div>
</div>