: absolute;
        top: 50px;
        background: gold;
        width: 110px;
        height: 10px;
    }
    .column-gap {
        position: absolute;
        top: 0px;
        left: 50px;
        background: blue;
        height: 110px;
        width: 10px;
    }
    .overflow {
        position: absolute;
        top: 0px;
        left: 0px;
        overflow: scroll;
        height: 80px;
        width: 80px;
    }
</style>
<div class="overflow">
    <div class="container">
        <div class="item"></d