platform_largeScreen/public/static/cesium/Widgets/Timeline/lighter.css

/* packages/widgets/Source/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;
}