style：历史记录查询-弹框table表头样式调整

src/views/iot/historyData/HistorySingleDeviceDialog.vue

@@ -124,7 +124,9 @@ const formatCell = (value: string | number | null | undefined) => {
 const headerCellStyle = () => {
   return {
     fontWeight: 500,
-    padding: '6px 4px'
+    padding: '6px 4px',
+    backgroundColor: 'var(--el-fill-color-light)',
+    color: 'var(--el-text-color-primary)'
   }
 }
 
@@ -238,6 +240,10 @@ watch(
   background: var(--el-fill-color-lighter);
 }
 
+.single-device-dialog__section :deep(.el-table) {
+  --el-table-row-hover-bg-color: transparent;
+}
+
 .single-device-dialog__record-title {
   font-size: 13px;
   margin-bottom: 6px;
@@ -253,4 +259,8 @@ watch(
 .single-device-dialog__section :deep(.el-table__inner-wrapper) {
   border-radius: 0;
 }
+
+.single-device-dialog__section :deep(.el-table__header-wrapper th) {
+  border-bottom-color: var(--el-border-color);
+}
 </style>