.scroll-table-div {
    overflow: auto;
    width: 100%;
    height: 650px; /* 固定高度 */
}

.scroll-table td, .scroll-table th {
    border: 1px solid gray;
    width: 100px;
    height: 30px;
}

.scroll-table {
    table-layout: fixed;
    width: 200px; /* 固定寬度 */
}

    .scroll-table td:first-child, .scroll-table th:first-child {
        position: sticky;
        left: 0; /* 首行永遠固定於左 */
        z-index: 1;
    }

    .scroll-table thead tr th {
        position: sticky;
        top: 0; /* 列首永遠固定於上 */
    }

    .scroll-table th:first-child {
        z-index: 2;
    }