diff --git a/lib/src/api/api_crypto.dart b/lib/src/api/api_crypto.dart
index 4b5dd57..4f4dfa1 100644
--- a/lib/src/api/api_crypto.dart
+++ b/lib/src/api/api_crypto.dart
@@ -1,4 +1,5 @@
 import 'dart:convert';
+import 'dart:math';
 
 import 'package:encrypt/encrypt.dart';
 
@@ -28,18 +29,19 @@ class ApiCrypto {
   }
 
   /// 生成随机 Base64 字符串（用于噪音字段）
-  static String randomBase64([int byteLength = 16]) {
-    final bytes = List<int>.generate(
-        byteLength, (_) => DateTime.now().millisecondsSinceEpoch % 256);
-    return base64Encode(bytes);
+  static String randomBase64() {
+    const chars = 'abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789';
+    final random = Random();
+    final length = 4 + random.nextInt(5); // 4-8位
+    final randomStr = List.generate(length, (_) => chars[random.nextInt(chars.length)]).join();
+    return base64Encode(utf8.encode(randomStr));
   }
 
   /// 生成 8 位随机字母数字
   static String randomAlnum() {
-    const chars =
+    const chars = 
         'abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789';
-    return List.generate(8,
-            (_) => chars[DateTime.now().microsecondsSinceEpoch % chars.length])
-        .join();
+    final random = Random();
+    return List.generate(8, (_) => chars[random.nextInt(chars.length)]).join();
   }
 }
diff --git a/lib/src/api/proxy_client.dart b/lib/src/api/proxy_client.dart
index 1c0142e..cabd0d3 100644
--- a/lib/src/api/proxy_client.dart
+++ b/lib/src/api/proxy_client.dart
@@ -135,7 +135,7 @@ class ProxyClient {
     final v2BodyEncoded = jsonEncode(v2Body);
 
     final logStr =
-        '========== 原始入参 ===========\npath: $path\nmethod: $method\nqueryParams: $paramsEncoded\nbody(sanctum): ${jsonEncode(sanctum)}';
+        '========== 原始入参 ===========\npath: $path\nmethod: $method \nheaders: $headersEncoded\nqueryParams: $paramsEncoded\nbody(sanctum): ${jsonEncode(sanctum)}';
     logWithEmbeddedJson(logStr);
 
     final proxyBody = <String, dynamic>{
@@ -153,6 +153,7 @@ class ProxyClient {
 
     final url = '$_baseUrl${config.proxyPath}';
 
+    logWithEmbeddedJson('========== 请求信息 ===========\n\n目标URL: $url');
     logWithEmbeddedJson('========== 实际请求体 ===========\n${jsonEncode(proxyBody)}');
     final response = await http.post(
       Uri.parse(url),
diff --git a/lib/src/config/attribution_config.dart b/lib/src/config/attribution_config.dart
index 2a32f6a..1e15eca 100644
--- a/lib/src/config/attribution_config.dart
+++ b/lib/src/config/attribution_config.dart
@@ -54,6 +54,7 @@ abstract class AttributionCallbacks {
   Future<String?> getReferrer();
   Future<String?> getAdjustReferrer();
   Future<String?> getPlatformReferrer();
+  Future<String?> getFacebookReferrer();
 }
 
 /// 默认归因实现
@@ -66,6 +67,9 @@ class DefaultAttributionCallbacks implements AttributionCallbacks {
 
   @override
   Future<String?> getPlatformReferrer() async => null;
+
+  @override
+  Future<String?> getFacebookReferrer() async => null;
 }
 
 /// 归因服务
@@ -87,4 +91,6 @@ abstract class AttributionService {
   static Future<String?> getAdjustReferrer() => callbacks.getAdjustReferrer();
   static Future<String?> getPlatformReferrer() =>
       callbacks.getPlatformReferrer();
+  static Future<String?> getFacebookReferrer() =>
+      callbacks.getFacebookReferrer();
 }
diff --git a/lib/src/log/app_logger.dart b/lib/src/log/app_logger.dart
index 1239f5f..34bf172 100644
--- a/lib/src/log/app_logger.dart
+++ b/lib/src/log/app_logger.dart
@@ -50,26 +50,48 @@ void _logLong(String text) {
     _proxyLog.d(text);
     return;
   }
+
   final buffer = StringBuffer();
-  int chunkIndex = 0;
+  var chunkIndex = 0;
+
+  void emitBuffer() {
+    if (buffer.isEmpty) return;
+    chunkIndex++;
+    _proxyLog.d(
+      chunkIndex > 1 ? '(part $chunkIndex)\n$buffer' : buffer.toString(),
+    );
+    buffer.clear();
+  }
+
+  /// 单条 print / logcat 往往有长度上限；超长单行必须再切分，否则会截断在任意字符处（例如字符串中间的 `"`）。
+  void emitLineInChunks(String line) {
+    for (var offset = 0; offset < line.length; offset += _maxLogChunk) {
+      final end = (offset + _maxLogChunk <= line.length)
+          ? offset + _maxLogChunk
+          : line.length;
+      chunkIndex++;
+      final piece = line.substring(offset, end);
+      _proxyLog.d(chunkIndex > 1 ? '(part $chunkIndex)\n$piece' : piece);
+    }
+  }
+
   for (final line in lines) {
+    if (line.length > _maxLogChunk) {
+      emitBuffer();
+      emitLineInChunks(line);
+      continue;
+    }
     final lineWithNewline = buffer.isEmpty ? line : '\n$line';
     if (buffer.length + lineWithNewline.length > _maxLogChunk &&
         buffer.isNotEmpty) {
-      chunkIndex++;
-      _proxyLog.d('(part $chunkIndex)\n$buffer');
-      buffer.clear();
+      emitBuffer();
       buffer.write(line);
     } else {
       if (buffer.isNotEmpty) buffer.write('\n');
       buffer.write(line);
     }
   }
-  if (buffer.isNotEmpty) {
-    chunkIndex++;
-    _proxyLog
-        .d(chunkIndex > 1 ? '(part $chunkIndex)\n$buffer' : buffer.toString());
-  }
+  emitBuffer();
 }
 
 /// 格式化输出嵌入在字符串中的 JSON，保持缩进对齐。
diff --git a/lib/src/services/auth_service.dart b/lib/src/services/auth_service.dart
index 8a3a55d..cc53562 100644
--- a/lib/src/services/auth_service.dart
+++ b/lib/src/services/auth_service.dart
@@ -2,6 +2,7 @@ import 'dart:async';
 import 'dart:convert';
 
 import 'package:flutter/foundation.dart';
+import 'package:flutter/material.dart';
 
 import '../api/api_client.dart';
 import '../api/proxy_client.dart';
@@ -90,6 +91,23 @@ abstract class FrameworkAuthService {
         debugPrint('[AuthService] start: referer=$referer');
       }
 
+      // 确定归因类型
+      String? referrerType;
+      final adjustReferrer = await AttributionService.getAdjustReferrer();
+      final fbReferrer = await AttributionService.getFacebookReferrer();
+
+      if (adjustReferrer != null && adjustReferrer.isNotEmpty) {
+        referrerType = defaultTargetPlatform == TargetPlatform.iOS
+            ? 'ios_adjust'
+            : 'android_adjust';
+      } else if (fbReferrer != null && fbReferrer.isNotEmpty) {
+        referrerType = 'fb';
+      }
+
+      if (kDebugMode) {
+        debugPrint('[AuthService] start: referrerType=$referrerType');
+      }
+
       // 尝试快速登录
       EntityResponse<FastLoginResponse>? res;
       for (var i = 0; i < maxRetries; i++) {
@@ -100,10 +118,14 @@ abstract class FrameworkAuthService {
           await Future<void>.delayed(Duration(seconds: retryDelaySeconds));
         }
         try {
+          final appType =
+              defaultTargetPlatform == TargetPlatform.iOS ? 'HIOS' : 'HAndroid';
           res = await UserApi.fastLogin(
             deviceId: deviceId,
             sign: sign,
             referer: referer ?? '',
+            app: appType,
+            type: referrerType,
           );
           break;
         } catch (e) {
diff --git a/lib/src/services/user_api.dart b/lib/src/services/user_api.dart
index 2067406..b444bfc 100644
--- a/lib/src/services/user_api.dart
+++ b/lib/src/services/user_api.dart
@@ -8,21 +8,30 @@ abstract final class UserApi {
   static ProxyClient get _client => ApiClient.instance.proxy;
 
   /// 设备快速登录
+  /// [deviceId] 设备ID (必填)
+  /// [sign] 签名，MD5(deviceId)大写32位 (必填)
+  /// [referer] 归因信息
+  /// [ch] 渠道
+  /// [type] referrer类型 (af/fb/gg/ios_adjust/android_adjust)
+  /// [app] 应用类型 (iOS: HIOS / Android: HAndroid)
   static Future<EntityResponse<FastLoginResponse>> fastLogin({
     required String deviceId,
     required String sign,
     String? referer,
     String? ch,
     String? type,
+    String? app,
   }) async {
+    final config = ApiClient.instance.config;
     return _client.requestEntity(
       path: '/v1/user/fast_login',
       method: 'POST',
       entityFactory: FastLoginResponse.fromJson,
       queryParams: {
         if (ch != null) 'ch': ch,
-        'pkg': ApiClient.instance.config.packageName,
+        'pkg': config.packageName,
         if (type != null) 'type': type,
+        if (app != null) 'app': app,
       },
       body: {
         'referer': referer ?? '',