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lib/config/theme/base/app_text_style.dart

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+import 'package:flutter/material.dart';
+import 'app_colors_base.dart'; // 假设你之前定义了 AppColorsBase
+
+TextTheme buildTextTheme(AppColorsBase colors) {
+  return TextTheme(
+    // 标题层级
+    titleLarge: TextStyle(
+      fontSize: 22, // 比正文大6
+      fontWeight: FontWeight.w700,
+      color: colors.textPrimary,
+    ),
+    titleMedium: TextStyle(
+      fontSize: 20, // 比正文大4
+      fontWeight: FontWeight.w700,
+      color: colors.textPrimary,
+    ),
+    titleSmall: TextStyle(
+      fontSize: 18, // 比正文大2
+      fontWeight: FontWeight.w600,
+      color: colors.textPrimary,
+    ),
+
+    // 正文字体
+    bodyLarge: TextStyle(
+      fontSize: 18, // 稍大正文
+      color: colors.textPrimary,
+    ),
+    bodyMedium: TextStyle(
+      fontSize: 16, // 正文标准
+      color: colors.textPrimary,
+    ),
+    bodySmall: TextStyle(
+      fontSize: 14, // 辅助正文
+      color: colors.textSecondary,
+    ),
+
+    // 标签/提示文字
+    labelLarge: TextStyle(
+      fontSize: 14, // 比正文小一点
+      fontWeight: FontWeight.w500,
+      color: colors.textSecondary,
+    ),
+    labelMedium: TextStyle(
+      fontSize: 12,
+      fontWeight: FontWeight.w500,
+      color: colors.textSecondary,
+    ),
+    labelSmall: TextStyle(
+      fontSize: 11,
+      fontWeight: FontWeight.w400,
+      color: colors.textSecondary,
+    ),
+  );
+}