diff --git a/src/views/ems/record/recordIOTInstant/index.vue b/src/views/ems/record/recordIOTInstant/index.vue
index 102bcaf..8857b27 100644
--- a/src/views/ems/record/recordIOTInstant/index.vue
+++ b/src/views/ems/record/recordIOTInstant/index.vue
@@ -991,9 +991,12 @@ export default {
 
 .device-group-title {
   font-weight: bold;
-  color: #303133;
-  padding-left: 5px;
+  color: #1f2d3d; /* 提升对比度，便于识别设备类型标题 */
+  font-size: 14px;
+  padding: 2px 6px;
   border-left: 3px solid #409EFF;
+  background: #f5f7fa; /* 浅底突出文字 */
+  border-radius: 3px;
 }
 
 .device-select-container .el-checkbox {