.fix-sticky {
    position: fixed;
    z-index: 100;
}

    .fix-sticky thead {
        background: #fff;
    }

        .fix-sticky thead th,
        .fix-sticky thead th:first-child {
            border-left: 0;
            border-right: 0;
            border-bottom: 1px solid #eee;
            border-radius: 0;
        }