去掉悬浮框与点击框之间的线条问题

解决方法：

.arc-toolbar .block.app.initialized:hover:after {
    display: block;
    content: '';
    position: absolute;
    width: 100%;
    height: 100%;
    top: 0;
    z-index: 101;
    left: 0;
    border-bottom: 1px solid #fff;
}