diff --git a/.gitea/workflows/android-release.yml b/.gitea/workflows/android-release.yml
index cac5f63..998e83c 100644
--- a/.gitea/workflows/android-release.yml
+++ b/.gitea/workflows/android-release.yml
@@ -140,6 +140,8 @@ jobs:
 
       - name: Build Android release APK
         shell: bash
+        env:
+          IP_NODE_API_BASE_URL: ${{ secrets.IP_NODE_API_BASE_URL }}
         run: |
           set -euo pipefail
 
@@ -151,8 +153,13 @@ jobs:
             rm -rf "$pkg_dir"
           fi
 
+          build_args=(--release)
+          if [ -n "${IP_NODE_API_BASE_URL:-}" ]; then
+            build_args+=("--dart-define=IP_NODE_API_BASE_URL=${IP_NODE_API_BASE_URL}")
+          fi
+
           echo "Building Flutter Android release APK..."
-          flutter build apk -v --release
+          flutter build apk "${build_args[@]}"
 
           mkdir -p "$pkg_dir"
           apk_path="$(find "$PWD/build/app/outputs" -type f -name '*release*.apk' | head -n 1)"
diff --git a/lib/presentation/pages/settings/network_test_page.dart b/lib/presentation/pages/settings/network_test_page.dart
index a8f3141..ec878b9 100644
--- a/lib/presentation/pages/settings/network_test_page.dart
+++ b/lib/presentation/pages/settings/network_test_page.dart
@@ -4,8 +4,12 @@ import 'dart:math';
 
 import 'package:flutter/material.dart';
 import 'package:http/http.dart' as http;
+import 'package:provider/provider.dart';
 import 'package:url_launcher/url_launcher.dart';
 
+import '../../../services/api_service.dart';
+import '../../../services/storage_service.dart';
+import '../../providers/auth_provider.dart';
 import '../../widgets/desktop_constrained.dart';
 import '../../widgets/toast_helper.dart';
 
@@ -21,21 +25,29 @@ class NetworkTestPage extends StatefulWidget {
 class _NetworkTestPageState extends State<NetworkTestPage> {
   static final _panUri = Uri.parse('https://pan.gongyun.org');
   static final _infoUri = Uri.parse('https://www.gongyun.org/appnetinfo.html');
+  static final _telegramUri = Uri.parse('https://t.me/GYNetwork');
   static final _primaryIpLookupUri = Uri.parse('https://ipwho.is/');
   static final _secondaryIpLookupUri = Uri.parse('https://ipapi.co/json/');
+  static const _ipNodeApiBaseUrlOverride = String.fromEnvironment(
+    'IP_NODE_API_BASE_URL',
+  );
   static const _probeHeaders = {'Cache-Control': 'no-cache'};
   static const _probeGetFallbackHeaders = {
     'Cache-Control': 'no-cache',
     'Range': 'bytes=0-0',
   };
+  static const _customProbeSampleCount = 3;
 
   _NetworkTestTab _tab = _NetworkTestTab.network;
   bool _networkLoading = false;
   bool _serviceLoading = false;
+  bool _customLoading = false;
   _NetworkDiagnostics? _networkDiagnostics;
   _ServiceDiagnostics? _serviceDiagnostics;
+  _CustomLineDiagnostics? _customDiagnostics;
   String? _networkError;
   String? _serviceError;
+  String? _customError;
 
   @override
   void initState() {
@@ -82,24 +94,8 @@ class _NetworkTestPageState extends State<NetworkTestPage> {
                     ),
                   ],
                   selected: {_tab},
-                  onSelectionChanged: (selection) {
-                    final selected = selection.first;
-                    if (selected == _NetworkTestTab.custom) {
-                      _showCustomUnavailableDialog();
-                      return;
-                    }
-                    setState(() => _tab = selected);
-                    if (selected == _NetworkTestTab.network &&
-                        _networkDiagnostics == null &&
-                        !_networkLoading) {
-                      _runNetworkTest();
-                    }
-                    if (selected == _NetworkTestTab.service &&
-                        _serviceDiagnostics == null &&
-                        !_serviceLoading) {
-                      _runServiceTest();
-                    }
-                  },
+                  onSelectionChanged: (selection) =>
+                      _handleTabSelection(selection.first),
                 ),
               ),
             ),
@@ -121,7 +117,14 @@ class _NetworkTestPageState extends State<NetworkTestPage> {
                     diagnostics: _serviceDiagnostics,
                     onRefresh: _runServiceTest,
                   ),
-                  _NetworkTestTab.custom => const SizedBox.shrink(),
+                  _NetworkTestTab.custom => _CustomLinePanel(
+                    key: const ValueKey('custom'),
+                    loading: _customLoading,
+                    error: _customError,
+                    diagnostics: _customDiagnostics,
+                    onRefresh: _runCustomLineTest,
+                    onOpenTelegram: () => _openExternalUrl(_telegramUri),
+                  ),
                 },
               ),
             ),
@@ -131,12 +134,54 @@ class _NetworkTestPageState extends State<NetworkTestPage> {
     );
   }
 
-  Future<void> _showCustomUnavailableDialog() async {
+  void _handleTabSelection(_NetworkTestTab selected) {
+    if (selected == _NetworkTestTab.custom) {
+      unawaited(_openCustomLineTab());
+      return;
+    }
+
+    setState(() => _tab = selected);
+    if (selected == _NetworkTestTab.network &&
+        _networkDiagnostics == null &&
+        !_networkLoading) {
+      _runNetworkTest();
+    }
+    if (selected == _NetworkTestTab.service &&
+        _serviceDiagnostics == null &&
+        !_serviceLoading) {
+      _runServiceTest();
+    }
+  }
+
+  Future<void> _openCustomLineTab() async {
+    final auth = context.read<AuthProvider>();
+    final groupName = auth.user?.group?.name.trim();
+    if (!auth.isAuthenticated || auth.user == null) {
+      await _showCustomBlockedDialog('自定义线路需要登录后使用，请先登录后再试。');
+      return;
+    }
+    if (groupName == null || groupName.isEmpty || _isUserGroup(groupName)) {
+      await _showCustomBlockedDialog(
+        '自定义线路为会员功能，您所在用户组为普通用户组请成为非普通用户方可使用"自定义线路"功能。',
+      );
+      return;
+    }
+
+    setState(() => _tab = _NetworkTestTab.custom);
+    if (_customDiagnostics == null && !_customLoading) {
+      await _runCustomLineTest();
+    }
+  }
+
+  bool _isUserGroup(String groupName) =>
+      groupName.trim().toLowerCase() == 'user';
+
+  Future<void> _showCustomBlockedDialog(String message) async {
     await showDialog<void>(
       context: context,
       builder: (dialogContext) => AlertDialog(
         title: const Text('自定义线路'),
-        content: const Text('自定义线路为会员功能，当前版本暂未开放。'),
+        content: Text(message),
         actions: [
           FilledButton(
             onPressed: () => Navigator.of(dialogContext).pop(),
@@ -158,6 +203,191 @@ class _NetworkTestPageState extends State<NetworkTestPage> {
     }
   }
 
+  Future<void> _runCustomLineTest() async {
+    if (_customLoading) return;
+
+    final auth = context.read<AuthProvider>();
+    final groupName = auth.user?.group?.name.trim();
+    if (!auth.isAuthenticated ||
+        auth.user == null ||
+        groupName == null ||
+        groupName.isEmpty ||
+        _isUserGroup(groupName)) {
+      setState(() {
+        _customError = '当前用户组无法使用自定义线路功能';
+      });
+      return;
+    }
+
+    setState(() {
+      _customLoading = true;
+      _customError = null;
+    });
+
+    try {
+      final clientId = await StorageService.instance.getOrCreateClientId();
+      final nodes = await _fetchCustomNodes(
+        clientId: clientId,
+        groupName: groupName,
+      );
+      final probes = await Future.wait(nodes.map(_testCustomNode));
+      final recommended = _bestCustomNode(probes);
+
+      if (!mounted) return;
+      setState(() {
+        _customDiagnostics = _CustomLineDiagnostics(
+          groupName: groupName,
+          nodes: probes,
+          recommended: recommended,
+        );
+      });
+    } catch (e) {
+      if (mounted) setState(() => _customError = e.toString());
+    } finally {
+      if (mounted) setState(() => _customLoading = false);
+    }
+  }
+
+  Future<List<_CustomNode>> _fetchCustomNodes({
+    required String clientId,
+    required String groupName,
+  }) async {
+    final handshakeResponse = await http
+        .post(
+          _ipNodeApiUri('/api/v1/handshake'),
+          headers: const {
+            'Accept': 'application/json',
+            'Content-Type': 'application/json',
+          },
+          body: jsonEncode({'client_uuid': clientId}),
+        )
+        .timeout(const Duration(seconds: 10));
+    if (handshakeResponse.statusCode < 200 ||
+        handshakeResponse.statusCode >= 300) {
+      throw Exception('IP节点服务握手失败: HTTP ${handshakeResponse.statusCode}');
+    }
+
+    final handshakePayload = _payloadObject(
+      _decodeObject(handshakeResponse.body),
+    );
+    final sessionToken = handshakePayload['session_token']?.toString();
+    if (sessionToken == null || sessionToken.isEmpty) {
+      throw Exception('IP节点服务未返回有效会话密钥');
+    }
+
+    final nodesResponse = await http
+        .get(
+          _ipNodeApiUri('/api/v1/nodes', queryParameters: {'group': groupName}),
+          headers: {
+            'Accept': 'application/json',
+            'X-Client-UUID': clientId,
+            'X-Session-Token': sessionToken,
+          },
+        )
+        .timeout(const Duration(seconds: 12));
+    if (nodesResponse.statusCode < 200 || nodesResponse.statusCode >= 300) {
+      throw Exception('IP节点池获取失败: HTTP ${nodesResponse.statusCode}');
+    }
+
+    final nodesPayload = _payloadObject(_decodeObject(nodesResponse.body));
+    final rawNodes = nodesPayload['nodes'];
+    if (rawNodes is! List) return const [];
+
+    return rawNodes
+        .whereType<Map>()
+        .map((node) => _CustomNode.fromJson(Map<String, dynamic>.from(node)))
+        .toList();
+  }
+
+  Map<String, dynamic> _decodeObject(String body) {
+    final decoded = jsonDecode(body);
+    if (decoded is Map<String, dynamic>) return decoded;
+    if (decoded is Map) return Map<String, dynamic>.from(decoded);
+    throw Exception('IP节点服务返回格式错误');
+  }
+
+  Map<String, dynamic> _payloadObject(Map<String, dynamic> response) {
+    final data = response['data'];
+    if (data is Map<String, dynamic>) return data;
+    if (data is Map) return Map<String, dynamic>.from(data);
+    return response;
+  }
+
+  Uri _ipNodeApiUri(String path, {Map<String, String>? queryParameters}) {
+    final base = _ipNodeApiBaseUri;
+    return Uri(
+      scheme: base.scheme,
+      userInfo: base.userInfo,
+      host: base.host,
+      port: base.hasPort ? base.port : null,
+      path: _joinUriPath(base.path, path),
+      queryParameters: queryParameters,
+    );
+  }
+
+  Uri get _ipNodeApiBaseUri {
+    final override = _ipNodeApiBaseUrlOverride.trim();
+    if (override.isNotEmpty) return Uri.parse(override);
+
+    final appApiBase = Uri.tryParse(ApiService.instance.dio.options.baseUrl);
+    if (appApiBase != null &&
+        appApiBase.hasScheme &&
+        appApiBase.host.isNotEmpty) {
+      return Uri(scheme: appApiBase.scheme, host: appApiBase.host, port: 7998);
+    }
+    return Uri.parse('http://127.0.0.1:7998');
+  }
+
+  String _joinUriPath(String basePath, String path) {
+    final child = path.startsWith('/') ? path.substring(1) : path;
+    if (basePath.isEmpty || basePath == '/') return '/$child';
+    final normalizedBase = basePath.endsWith('/')
+        ? basePath.substring(0, basePath.length - 1)
+        : basePath;
+    return '$normalizedBase/$child';
+  }
+
+  Future<_CustomNodeProbe> _testCustomNode(_CustomNode node) async {
+    final probeUri = node.probeUri ?? node.endpointUri;
+    if (probeUri == null) {
+      return _CustomNodeProbe(
+        node: node,
+        sampleCount: _customProbeSampleCount,
+        successCount: 0,
+      );
+    }
+
+    final latencies = <int>[];
+    var successCount = 0;
+    for (var i = 0; i < _customProbeSampleCount; i++) {
+      final probe = await _probeUri(probeUri);
+      if (probe.reachable) {
+        successCount += 1;
+        if (probe.latencyMs != null) latencies.add(probe.latencyMs!);
+      }
+      if (i < _customProbeSampleCount - 1) {
+        await Future<void>.delayed(const Duration(milliseconds: 250));
+      }
+    }
+
+    final averageLatencyMs = latencies.isEmpty
+        ? null
+        : (latencies.reduce((a, b) => a + b) / latencies.length).round();
+    return _CustomNodeProbe(
+      node: node,
+      sampleCount: _customProbeSampleCount,
+      successCount: successCount,
+      averageLatencyMs: averageLatencyMs,
+    );
+  }
+
+  _CustomNodeProbe? _bestCustomNode(List<_CustomNodeProbe> probes) {
+    final reachable = probes.where((probe) => probe.successCount > 0).toList();
+    if (reachable.isEmpty) return null;
+    reachable.sort((a, b) => a.score.compareTo(b.score));
+    return reachable.first;
+  }
+
   Future<void> _runNetworkTest() async {
     if (_networkLoading) return;
 
@@ -600,6 +830,154 @@ class _ServicePanel extends StatelessWidget {
   }
 }
 
+class _CustomLinePanel extends StatelessWidget {
+  final bool loading;
+  final String? error;
+  final _CustomLineDiagnostics? diagnostics;
+  final VoidCallback onRefresh;
+  final VoidCallback onOpenTelegram;
+
+  const _CustomLinePanel({
+    super.key,
+    required this.loading,
+    required this.error,
+    required this.diagnostics,
+    required this.onRefresh,
+    required this.onOpenTelegram,
+  });
+
+  @override
+  Widget build(BuildContext context) {
+    final data = diagnostics;
+    final recommended = data?.recommended;
+    return ListView(
+      padding: const EdgeInsets.fromLTRB(16, 4, 16, 18),
+      children: [
+        _SectionCard(
+          title: '推荐节点',
+          children: [
+            if (loading) const LinearProgressIndicator(),
+            if (error != null) _ErrorText(error!),
+            if (data != null) ...[
+              _InfoRow(label: '当前用户组', value: data.groupName),
+              _InfoRow(label: '可用节点数量', value: '${data.nodes.length}'),
+            ],
+            if (recommended != null) ...[
+              _InfoRow(
+                label: '推荐节点',
+                value: recommended.node.displayName,
+                valueColor: Colors.green,
+              ),
+              _InfoRow(label: '节点地址', value: recommended.node.endpointLabel),
+              _InfoRow(label: '地区', value: recommended.node.locationLabel),
+              _InfoRow(label: '运营商', value: recommended.node.carrierLabel),
+              _InfoRow(label: '平均延迟', value: recommended.latencyLabel),
+              _InfoRow(label: '丢包率', value: recommended.lossLabel),
+            ] else if (!loading && data != null) ...[
+              const _DescriptionLine('暂无可推荐节点，请刷新后重试或联系官方支持。'),
+            ] else if (!loading && error == null) ...[
+              const _DescriptionLine('进入页面后将自动获取节点并进行推荐。'),
+            ],
+          ],
+        ),
+        _SectionCard(title: '可选节点', children: _availableNodeChildren(data)),
+        _SectionCard(
+          title: '自定义节点',
+          children: const [_DescriptionLine('预留功能，后续将支持手动填写和保存自定义节点。')],
+        ),
+        _SectionCard(
+          title: '专线节点申请',
+          children: [
+            const _DescriptionLine(
+              '如需申请专线节点，可以联系公云存储官方邮箱 operate@gongyun.org 或 Telegram：https://t.me/GYNetwork。',
+            ),
+            const _DescriptionLine('申请时请提供所在国家/地区、对应省份和运营商，便于官方评估线路可用性。'),
+            Align(
+              alignment: Alignment.centerLeft,
+              child: TextButton.icon(
+                onPressed: onOpenTelegram,
+                icon: const Icon(Icons.open_in_new),
+                label: const Text('打开 Telegram'),
+              ),
+            ),
+          ],
+        ),
+        const SizedBox(height: 8),
+        FilledButton.icon(
+          onPressed: loading ? null : onRefresh,
+          icon: const Icon(Icons.refresh),
+          label: const Text('重新检测'),
+        ),
+      ],
+    );
+  }
+
+  List<Widget> _availableNodeChildren(_CustomLineDiagnostics? data) {
+    if (data == null) {
+      return [_InfoRow(label: '节点', value: loading ? '加载中' : '等待获取')];
+    }
+    if (data.nodes.isEmpty) {
+      return const [_DescriptionLine('当前用户组暂无可选节点。')];
+    }
+
+    return [
+      for (var i = 0; i < data.nodes.length; i++) ...[
+        if (i > 0) const Divider(height: 18),
+        _CustomNodeTile(probe: data.nodes[i]),
+      ],
+    ];
+  }
+}
+
+class _CustomNodeTile extends StatelessWidget {
+  final _CustomNodeProbe probe;
+
+  const _CustomNodeTile({required this.probe});
+
+  @override
+  Widget build(BuildContext context) {
+    final available = probe.successCount > 0;
+    final statusColor = _statusColor(context, available);
+    return Padding(
+      padding: const EdgeInsets.symmetric(vertical: 4),
+      child: Column(
+        crossAxisAlignment: CrossAxisAlignment.start,
+        children: [
+          Row(
+            crossAxisAlignment: CrossAxisAlignment.start,
+            children: [
+              Expanded(
+                child: Text(
+                  probe.node.displayName,
+                  style: Theme.of(
+                    context,
+                  ).textTheme.bodyLarge?.copyWith(fontWeight: FontWeight.w700),
+                ),
+              ),
+              const SizedBox(width: 12),
+              Text(
+                available ? '可用' : '不可用',
+                style: TextStyle(
+                  color: statusColor,
+                  fontWeight: FontWeight.w700,
+                ),
+              ),
+            ],
+          ),
+          const SizedBox(height: 4),
+          Text(probe.node.endpointLabel),
+          const SizedBox(height: 4),
+          Text('${probe.node.locationLabel} / ${probe.node.carrierLabel}'),
+          const SizedBox(height: 4),
+          Text(
+            '平均延迟 ${probe.latencyLabel} / 丢包率 ${probe.lossLabel} / 样本 ${probe.sampleLabel}',
+          ),
+        ],
+      ),
+    );
+  }
+}
+
 class _SectionCard extends StatelessWidget {
   final String title;
   final List<Widget> children;
@@ -737,6 +1115,177 @@ class _IpInfo {
   });
 }
 
+class _CustomLineDiagnostics {
+  final String groupName;
+  final List<_CustomNodeProbe> nodes;
+  final _CustomNodeProbe? recommended;
+
+  const _CustomLineDiagnostics({
+    required this.groupName,
+    required this.nodes,
+    required this.recommended,
+  });
+}
+
+class _CustomNode {
+  final String id;
+  final String name;
+  final String host;
+  final String ip;
+  final int? port;
+  final String protocol;
+  final String region;
+  final String country;
+  final String province;
+  final String carrier;
+  final List<String> groups;
+  final bool enabled;
+  final String probeUrl;
+
+  const _CustomNode({
+    required this.id,
+    required this.name,
+    required this.host,
+    required this.ip,
+    required this.port,
+    required this.protocol,
+    required this.region,
+    required this.country,
+    required this.province,
+    required this.carrier,
+    required this.groups,
+    required this.enabled,
+    required this.probeUrl,
+  });
+
+  factory _CustomNode.fromJson(Map<String, dynamic> json) {
+    return _CustomNode(
+      id: json['id']?.toString() ?? '',
+      name: json['name']?.toString() ?? '',
+      host: json['host']?.toString() ?? '',
+      ip: json['ip']?.toString() ?? '',
+      port: _asNullableInt(json['port']),
+      protocol: json['protocol']?.toString() ?? 'https',
+      region: json['region']?.toString() ?? '',
+      country: json['country']?.toString() ?? '',
+      province: json['province']?.toString() ?? '',
+      carrier: json['carrier']?.toString() ?? '',
+      groups: _asStringList(json['groups']),
+      enabled: json['enabled'] != false,
+      probeUrl: json['probe_url']?.toString() ?? '',
+    );
+  }
+
+  String get displayName {
+    final trimmedName = name.trim();
+    if (trimmedName.isNotEmpty) return trimmedName;
+    final endpoint = endpointHost;
+    return endpoint.isEmpty ? '未命名节点' : endpoint;
+  }
+
+  String get endpointHost {
+    final trimmedHost = host.trim();
+    if (trimmedHost.isNotEmpty) return trimmedHost;
+    return ip.trim();
+  }
+
+  String get endpointLabel {
+    final endpoint = endpointHost;
+    if (endpoint.isEmpty) return '未配置地址';
+    final scheme = protocol.trim().isEmpty ? 'https' : protocol.trim();
+    final portSuffix = port != null && port! > 0 ? ':$port' : '';
+    return '$scheme://$endpoint$portSuffix';
+  }
+
+  String get locationLabel {
+    final parts = <String>[];
+    for (final value in [country, province, region]) {
+      final trimmed = value.trim();
+      if (trimmed.isNotEmpty && !parts.contains(trimmed)) {
+        parts.add(trimmed);
+      }
+    }
+    return parts.isEmpty ? '未配置地区' : parts.join(' / ');
+  }
+
+  String get carrierLabel {
+    final trimmedCarrier = carrier.trim();
+    return trimmedCarrier.isEmpty ? '未配置运营商' : trimmedCarrier;
+  }
+
+  Uri? get probeUri {
+    final value = probeUrl.trim();
+    if (value.isEmpty) return null;
+    final uri = Uri.tryParse(value);
+    if (uri == null || !uri.hasScheme || uri.host.isEmpty) return null;
+    return uri;
+  }
+
+  Uri? get endpointUri {
+    final endpoint = endpointHost;
+    final scheme = protocol.trim().toLowerCase();
+    if (endpoint.isEmpty || (scheme != 'http' && scheme != 'https')) {
+      return null;
+    }
+    return Uri(scheme: scheme, host: endpoint, port: port);
+  }
+
+  static int? _asNullableInt(Object? value) {
+    if (value is int) return value;
+    if (value is num) return value.round();
+    return int.tryParse(value?.toString() ?? '');
+  }
+
+  static List<String> _asStringList(Object? value) {
+    if (value is List) {
+      return value
+          .map((item) => item.toString().trim())
+          .where((item) => item.isNotEmpty)
+          .toList();
+    }
+    if (value is String) {
+      return value
+          .split(',')
+          .map((item) => item.trim())
+          .where((item) => item.isNotEmpty)
+          .toList();
+    }
+    return const [];
+  }
+}
+
+class _CustomNodeProbe {
+  final _CustomNode node;
+  final int sampleCount;
+  final int successCount;
+  final int? averageLatencyMs;
+
+  const _CustomNodeProbe({
+    required this.node,
+    required this.sampleCount,
+    required this.successCount,
+    this.averageLatencyMs,
+  });
+
+  double get packetLossPercent {
+    if (sampleCount <= 0) return 100;
+    return ((sampleCount - successCount) / sampleCount) * 100;
+  }
+
+  double get score {
+    return (averageLatencyMs ?? 999999).toDouble() + packetLossPercent * 20;
+  }
+
+  String get latencyLabel {
+    if (averageLatencyMs == null) return '-- ms';
+    return '$averageLatencyMs ms';
+  }
+
+  String get lossLabel => '${packetLossPercent.toStringAsFixed(0)}%';
+
+  String get sampleLabel => '$successCount/$sampleCount';
+}
+
 class _ServiceDiagnostics {
   final DateTime fetchedAt;
   final List<_ServiceItem> business;