Agriculture-front-end/public/Cesium/Widgets/Timeline/lighter.css

.cesium-lighter .cesium-timeline-bar {
    background: linear-gradient(to bottom, #eeeeee 0%,#ffffff 50%,#fafafa 100%);
}

.cesium-lighter .cesium-timeline-ticLabel {
    color: #000;
}

.cesium-lighter .cesium-timeline-ticMain {
    position: absolute;
    bottom: 0;
    left: 0;
    width: 1px;
    height: 50%;
    background: #000;
}

.cesium-lighter .cesium-timeline-ticSub {
    background: #444;
}