cpp-ui/src/assets/styles/dark-element-ui.scss

@@ -146,3 +146,9 @@
   background-color: transparent !important;
   color: #606266 !important;
 }
+.el-table__expand-icon {
+  color: #ffffff;
+}
+.el-table--enable-row-transition .el-table__body td.el-table__cell {
+  background: transparent;
+}