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+import '../core/network/api_client.dart';
+import '../core/network/endpoints.dart';
+import '../models/membership_models.dart';
+
+/// 会员服务（《03-接口文档》第 7 章）
+class MembershipService {
+  MembershipService._();
+
+  /// 7.1 套餐列表（游客可，价格来自服务端配置）
+  static Future<PlansResult> fetchPlans() async {
+    final data = await ApiClient.get<Map<String, dynamic>>(
+      Endpoints.membershipPlans,
+    );
+    return PlansResult.fromJson(data);
+  }
+
+  /// 7.2 我的会员状态（需登录）
+  static Future<MyMemberState> fetchMe() async {
+    final data = await ApiClient.get<Map<String, dynamic>>(
+      Endpoints.membershipMe,
+    );
+    return MyMemberState.fromJson(data);
+  }
+
+  /// 7.3 积分开通会员（需登录）
+  /// 错误码：2004 终身卡重复开通，2001 积分不足
+  static Future<RedeemResult> redeem(String planCode) async {
+    final data = await ApiClient.post<Map<String, dynamic>>(
+      Endpoints.membershipRedeem,
+      data: {'plan_code': planCode},
+    );
+    return RedeemResult.fromJson(data);
+  }
+}
+
+/// 开通结果
+class RedeemResult {
+  const RedeemResult({
+    required this.orderNo,
+    required this.planName,
+    required this.pointsCost,
+    required this.remainingPoints,
+    required this.expireAt,
+  });
+
+  final String orderNo;
+  final String planName;
+  final int pointsCost;
+  final int remainingPoints;
+  final String expireAt;
+
+  factory RedeemResult.fromJson(Map<String, dynamic> json) => RedeemResult(
+        orderNo: json['order_no'] as String,
+        planName: json['plan_name'] as String,
+        pointsCost: (json['points_cost'] as num).toInt(),
+        remainingPoints: (json['remaining_points'] as num).toInt(),
+        expireAt: json['expire_at'] as String,
+      );
+}