更新一个字体

lib/main.dart

@@ -5,7 +5,6 @@ import 'services/saf_storage_service.dart';
 void main() async {
   WidgetsFlutterBinding.ensureInitialized();
 
-  // 🟢 初始化 SAF 服务
   await SafStorageService().init();
 
   runApp(const MyApp());
@@ -19,9 +18,47 @@ class MyApp extends StatelessWidget {
     return MaterialApp(
       title: '电池健康度',
       theme: ThemeData(
+        // 🟢 中文用 HarmonyOS Sans SC
         fontFamily: 'HarmonyOS_Sans_SC',
-        colorScheme: ColorScheme.fromSeed(
-          seedColor: const Color.fromARGB(255, 255, 255, 255),
+        // 🟢 数字回退到 FlymeFont
+        fontFamilyFallback: const ['Flyme'],
+        // 🟢 统一文字颜色为黑色
+        colorScheme: ColorScheme.fromSeed(seedColor: const Color(0xFFFFFFFF))
+            .copyWith(
+              onSurface: Colors.black, // 主要文字颜色
+              onBackground: Colors.black,
+            ),
+        textTheme: const TextTheme(
+          // 大标题/数字（健康度、容量等）
+          displayMedium: TextStyle(
+            fontFamily: 'HarmonyOS_Sans_SC',
+            fontFamilyFallback: ['Flyme'],
+            color: Colors.black,
+          ),
+          // 标题（如“容量百分比变动趋势”）
+          headlineMedium: TextStyle(
+            fontFamily: 'HarmonyOS_Sans_SC',
+            fontFamilyFallback: ['Flyme'],
+            color: Colors.black,
+          ),
+          // 正文（电压、温度、循环次数等）
+          bodyMedium: TextStyle(
+            fontFamily: 'HarmonyOS_Sans_SC',
+            fontFamilyFallback: ['Flyme'],
+            color: Colors.black,
+          ),
+          // 小字（日期、辅助信息）
+          bodySmall: TextStyle(
+            fontFamily: 'HarmonyOS_Sans_SC',
+            fontFamilyFallback: ['Flyme'],
+            color: Colors.black87,
+          ),
+          // 数字专用（大号数字，如健康度百分比）
+          displayLarge: TextStyle(
+            fontFamily: 'HarmonyOS_Sans_SC',
+            fontFamilyFallback: ['Flyme'],
+            color: Colors.black,
+          ),
         ),
         useMaterial3: true,
       ),