diff --git a/assets/flutter_i18n/en_US.yaml b/assets/flutter_i18n/en_US.yaml
index ae1fb632..957304f5 100644
--- a/assets/flutter_i18n/en_US.yaml
+++ b/assets/flutter_i18n/en_US.yaml
@@ -636,6 +636,19 @@ library:
   borrow_list_info: Borrowing {borrow} book(s), among which {dued} book(s) have expired
   search_book_window: null
   search_here: Search here
+  normal_search: Normal Search
+  advanced_search: Advanced Search
+  search: Search
+  match_mode: Match Mode
+  match_exact: Exact
+  match_fuzzy: Fuzzy
+  match_prefix: Prefix
+  document_type: Document Type
+  document_type_all: All
+  document_type_book: Book
+  only_on_shelf: Only on shelf
+  publish_year_begin: Publish year from
+  publish_year_end: Publish year to
   book_detail: Book details
   no_result: No result, change parameter or start your search
 library_card:
@@ -803,6 +816,15 @@ setting:
   color_setting: Color theme
   simplify_timeline: Simplify schedule timeline
   simplify_timeline_description: Reduce space occupation while no schedule
+  low_electricity_warning: Low electricity card color warning
+  low_electricity_warning_description:
+    Change the homepage electricity card color when remaining electricity is below
+    the threshold
+  low_electricity_threshold: Low electricity threshold
+  low_electricity_threshold_description: "Current: {threshold} kWh"
+  low_electricity_threshold_dialog:
+    title: Set low electricity threshold
+    input_hint: Input remaining electricity
   account_setting: Account Settings
   sport_password_setting: PE system password
   experiment_password_setting: Physics experiment password
diff --git a/assets/flutter_i18n/zh_CN.yaml b/assets/flutter_i18n/zh_CN.yaml
index 2a790aaf..e563db32 100644
--- a/assets/flutter_i18n/zh_CN.yaml
+++ b/assets/flutter_i18n/zh_CN.yaml
@@ -566,6 +566,19 @@ library:
   borrow_list_info: 在借 {borrow} 本，其中已过期 {dued} 本
   search_book_window: null
   search_here: 在此搜索
+  normal_search: 普通搜索
+  advanced_search: 高级搜索
+  search: 搜索
+  match_mode: 匹配方式
+  match_exact: 精确匹配
+  match_fuzzy: 模糊匹配
+  match_prefix: 前方一致
+  document_type: 文献类型
+  document_type_all: 全部
+  document_type_book: 图书
+  only_on_shelf: 仅看在架
+  publish_year_begin: 出版年起
+  publish_year_end: 出版年止
   book_detail: 书籍详细信息
   no_result: 没有结果，请修改搜索参数或者开始你的搜索
 library_card:
@@ -726,6 +739,13 @@ setting:
   color_setting: 颜色设置
   simplify_timeline: 简化日程时间轴
   simplify_timeline_description: 没有日程时 减少空间占用
+  low_electricity_warning: 低电量卡片变色提醒
+  low_electricity_warning_description: 电量小于阈值时 电量卡片变色提醒
+  low_electricity_threshold: 低电量阈值
+  low_electricity_threshold_description: 当前为 {threshold} 度
+  low_electricity_threshold_dialog:
+    title: 设置低电量阈值
+    input_hint: 请输入电量度数
   account_setting: 账号设置
   sport_password_setting: 体育系统密码设置
   experiment_password_setting: 物理实验系统密码设置
diff --git a/assets/flutter_i18n/zh_TW.yaml b/assets/flutter_i18n/zh_TW.yaml
index 265a5d92..74b70b78 100644
--- a/assets/flutter_i18n/zh_TW.yaml
+++ b/assets/flutter_i18n/zh_TW.yaml
@@ -564,6 +564,19 @@ library:
   borrow_list_info: 在借 {borrow} 本，其中已過期 {dued} 本
   search_book_window: null
   search_here: 在此搜索
+  normal_search: 普通搜索
+  advanced_search: 高級搜索
+  search: 搜索
+  match_mode: 匹配方式
+  match_exact: 精確匹配
+  match_fuzzy: 模糊匹配
+  match_prefix: 前方一致
+  document_type: 文獻類型
+  document_type_all: 全部
+  document_type_book: 圖書
+  only_on_shelf: 僅看在架
+  publish_year_begin: 出版年起
+  publish_year_end: 出版年止
   book_detail: 書籍詳細信息
   no_result: 沒有結果，請修改搜索參數或者開始你的搜索
 library_card:
@@ -724,6 +737,13 @@ setting:
   color_setting: 顏色設置
   simplify_timeline: 簡化日程時間軸
   simplify_timeline_description: 沒有日程時 減少空間佔用
+  low_electricity_warning: 低電量卡片變色提醒
+  low_electricity_warning_description: 電量小於閾值時 電量卡片變色提醒
+  low_electricity_threshold: 低電量閾值
+  low_electricity_threshold_description: 目前為 {threshold} 度
+  low_electricity_threshold_dialog:
+    title: 設置低電量閾值
+    input_hint: 請輸入電量度數
   account_setting: 賬號設置
   sport_password_setting: 體育系統密碼設置
   experiment_password_setting: 物理實驗系統密碼設置
diff --git a/lib/model/xidian_ids/library.dart b/lib/model/xidian_ids/library.dart
index 511cb76b..ed1791eb 100644
--- a/lib/model/xidian_ids/library.dart
+++ b/lib/model/xidian_ids/library.dart
@@ -70,9 +70,60 @@ class BorrowData {
   factory BorrowData.fromJson(Map<String, dynamic> json) =>
       _$BorrowDataFromJson(json);
 
+  factory BorrowData.fromOpacJson(Map<String, dynamic> json) {
+    final normReturnDate = _stringValue(json['normReturnDate']);
+    final dueDate = _parseLibraryDate(normReturnDate);
+    final today = DateTime.now();
+    final todayDate = DateTime(today.year, today.month, today.day);
+
+    return BorrowData(
+      lendDay: dueDate.difference(todayDate).inDays,
+      locationId: _intValue(json['locationId']),
+      loanId: _intValue(json['loanId']),
+      renewTimes: _intValue(json['renewTimes']),
+      recallTimes: _intValue(json['recallTimes']),
+      loanDate: _stringValue(json['loanDate']),
+      renewDate: _nullableStringValue(json['renewDate']),
+      normReturnDate: normReturnDate,
+      returnDate: _nullableStringValue(json['returnDate']),
+      loanType: _stringValue(json['loanType']),
+      locationName: _stringValue(json['locationName']),
+      itemLibCode: _stringValue(json['curLibCode'] ?? json['itemLibCode']),
+      itemLibName: _stringValue(json['curLibName'] ?? json['itemLibName']),
+      loanDeskName: _stringValue(json['loanDeskName']),
+      title: _stringValue(json['title']),
+      author: _stringValue(json['author']),
+      publisher: _stringValue(json['publisher']),
+      isbn: _stringValue(json['isbn']),
+      isbn10: _stringValue(json['isbn10']),
+      isbn13: _stringValue(json['isbn13']),
+      publishYear: _stringValue(json['publishYear']),
+      titles: _nullableStringValue(json['titles']),
+      barcode: _stringValue(json['barcode'] ?? json['propNo']),
+    );
+  }
+
   Map<String, dynamic> toJson() => _$BorrowDataToJson(this);
 }
 
+int _intValue(Object? value) {
+  if (value is int) return value;
+  if (value is num) return value.toInt();
+  if (value is String) return int.tryParse(value) ?? 0;
+  return 0;
+}
+
+String _stringValue(Object? value) => value?.toString() ?? "";
+
+String? _nullableStringValue(Object? value) => value?.toString();
+
+DateTime _parseLibraryDate(String value) {
+  if (value.isEmpty) {
+    return DateTime.now();
+  }
+  return DateTime.parse(value.replaceAll('/', '-').split(' ').first);
+}
+
 @JsonSerializable()
 class BookInfo {
   final String? author;
@@ -92,6 +143,8 @@ class BookInfo {
   final List<String?>? barCodes;
   final List<String>? searchCode;
   final List<BookLocation>? items;
+  final int? availableCount;
+  final int? storageCount;
   String? imageUrl;
 
   BookInfo({
@@ -112,15 +165,48 @@ class BookInfo {
     this.searchCode,
     required this.barCodes,
     this.items,
+    this.availableCount,
+    this.storageCount,
     this.imageUrl,
   });
 
   factory BookInfo.fromJson(Map<String, dynamic> json) =>
       _$BookInfoFromJson(json);
 
+  factory BookInfo.fromOpacJson(Map<String, dynamic> json) {
+    final callNos = _stringList(json['callNo']);
+    final barCodes = _nullableStringList(
+      json['barCodes'] ?? json['barcode'] ?? json['propNo'],
+    );
+    return BookInfo(
+      author: _nullableStringValue(json['author']),
+      subject: _nullableStringValue(json['subjectWord']),
+      isbn: _nullableStringValue(json['isbn']),
+      description: _nullableStringValue(json['adstract'] ?? json['ddAbstract']),
+      bookName: _stringValue(json['title']),
+      barCode: _nullableStringValue(json['barcode'] ?? json['propNo']),
+      docNumber: _intValue(json['recordId']),
+      publishYear: _nullableStringValue(json['publishYear'] ?? json['year']),
+      publisherHouse: _nullableStringValue(json['publisher']),
+      groupCode: _nullableStringValue(json['groupCode']),
+      callNos: callNos,
+      searchCode: callNos,
+      barCodes: barCodes,
+      availableCount: _nullableIntValue(
+        json['onShelfCountI'] ?? json['canBrrowCountI'] ?? json['onShelfNum'],
+      ),
+      storageCount: _nullableIntValue(
+        json['groupPhysicalCount'] ?? json['physicalCount'],
+      ),
+    );
+  }
+
   Map<String, dynamic> toJson() => _$BookInfoToJson(this);
 
   int? get canBeBorrowed {
+    if (availableCount != null) {
+      return availableCount;
+    }
     if (items == null) {
       return null;
     }
@@ -131,6 +217,20 @@ class BookInfo {
     return toReturn;
   }
 
+  int? get totalStorage {
+    if (storageCount != null) {
+      return storageCount;
+    }
+    return items?.length;
+  }
+
+  bool get hasBarCodes {
+    if (barCodes == null || barCodes!.isEmpty) {
+      return false;
+    }
+    return barCodes!.any((e) => e != null && e.isNotEmpty);
+  }
+
   String get searchCodeStr {
     if (searchCode == null || searchCode!.isEmpty) {
       return "未提供";
@@ -142,8 +242,39 @@ class BookInfo {
     if (barCodes == null || barCodes!.isEmpty) {
       return "未提供";
     }
-    return barCodes!.first ?? "未提供";
+    for (final code in barCodes!) {
+      if (code != null && code.isNotEmpty) {
+        return code;
+      }
+    }
+    return "未提供";
+  }
+}
+
+int? _nullableIntValue(Object? value) {
+  if (value == null) return null;
+  if (value is int) return value;
+  if (value is num) return value.toInt();
+  if (value is String) return int.tryParse(value);
+  return null;
+}
+
+List<String>? _stringList(Object? value) {
+  if (value == null) return null;
+  if (value is List) {
+    return value.map((e) => e.toString()).where((e) => e.isNotEmpty).toList();
+  }
+  final text = value.toString();
+  return text.isEmpty ? null : [text];
+}
+
+List<String?>? _nullableStringList(Object? value) {
+  if (value == null) return null;
+  if (value is List) {
+    return value.map((e) => e?.toString()).toList();
   }
+  final text = value.toString();
+  return text.isEmpty ? null : [text];
 }
 
 @JsonSerializable()
@@ -183,6 +314,33 @@ class BookLocation {
   factory BookLocation.fromJson(Map<String, dynamic> json) =>
       _$BookLocationFromJson(json);
 
+  factory BookLocation.fromOpacJson(Map<String, dynamic> json) {
+    final locationName = _stringValue(
+      json['realLocationName'] ?? json['locationName'],
+    );
+    final shelfName = _stringValue(json['urlName']);
+    final displayLocation = shelfName.isEmpty
+        ? locationName
+        : "$locationName $shelfName";
+
+    return BookLocation(
+      yearVol: _nullableStringValue(json['vol'] ?? json['yearVol']),
+      locationName: displayLocation.isEmpty ? null : displayLocation,
+      searchCode: _stringValue(json['callNo']),
+      campus: _nullableStringValue(json['campus']),
+      inDate: _nullableStringValue(json['inDate']),
+      barCode: _nullableStringValue(json['barcode'] ?? json['propNo']),
+      itemId: _intValue(json['itemId']),
+      circAttr: _stringValue(json['circAttr']),
+      locationId: _nullableStringValue(json['locationId']),
+      processType: _stringValue(json['processType']),
+      curLocationId: _stringValue(json['curLocationId']),
+      propNo: _nullableStringValue(json['propNo']),
+      borrowStatus: _nullableStringValue(json['borrowStatus']),
+      noBorrowMessages: _nullableStringValue(json['noBorrowMessages']),
+    );
+  }
+
   Map<String, dynamic> toJson() => _$BookLocationToJson(this);
 }
 
diff --git a/lib/model/xidian_ids/library.g.dart b/lib/model/xidian_ids/library.g.dart
index 5848bac6..c7699d59 100644
--- a/lib/model/xidian_ids/library.g.dart
+++ b/lib/model/xidian_ids/library.g.dart
@@ -89,6 +89,8 @@ BookInfo _$BookInfoFromJson(Map<String, dynamic> json) => BookInfo(
   items: (json['items'] as List<dynamic>?)
       ?.map((e) => BookLocation.fromJson(e as Map<String, dynamic>))
       .toList(),
+  availableCount: (json['availableCount'] as num?)?.toInt(),
+  storageCount: (json['storageCount'] as num?)?.toInt(),
   imageUrl: json['imageUrl'] as String?,
 );
 
@@ -110,6 +112,8 @@ Map<String, dynamic> _$BookInfoToJson(BookInfo instance) => <String, dynamic>{
   'barCodes': instance.barCodes,
   'searchCode': instance.searchCode,
   'items': instance.items,
+  'availableCount': instance.availableCount,
+  'storageCount': instance.storageCount,
   'imageUrl': instance.imageUrl,
 };
 
diff --git a/lib/page/homepage/home_card_padding.dart b/lib/page/homepage/home_card_padding.dart
index 93727e56..696328b4 100644
--- a/lib/page/homepage/home_card_padding.dart
+++ b/lib/page/homepage/home_card_padding.dart
@@ -5,7 +5,7 @@
 import 'package:flutter/material.dart';
 import 'package:styled_widget/styled_widget.dart';
 
-enum HomeCardType { plain, filled }
+enum HomeCardType { plain, filled, warning }
 
 extension HomeCardPadding on Widget {
   Widget withHomeCardStyle(
@@ -27,6 +27,9 @@ extension HomeCardPadding on Widget {
         iconSize: WidgetStateProperty.all(20),
         backgroundColor: WidgetStateProperty.resolveWith((states) {
           final colorScheme = Theme.of(context).colorScheme;
+          if (type == HomeCardType.warning) {
+            return colorScheme.errorContainer;
+          }
           if (type == HomeCardType.filled) {
             return colorScheme.surfaceContainerHigh;
           }
@@ -34,6 +37,9 @@ extension HomeCardPadding on Widget {
         }),
         foregroundColor: WidgetStateProperty.resolveWith((states) {
           final colorScheme = Theme.of(context).colorScheme;
+          if (type == HomeCardType.warning) {
+            return colorScheme.onErrorContainer;
+          }
           if (type == HomeCardType.filled) {
             return colorScheme.onSurfaceVariant;
           }
@@ -41,6 +47,9 @@ extension HomeCardPadding on Widget {
         }),
         side: WidgetStateProperty.resolveWith((states) {
           final colorScheme = Theme.of(context).colorScheme;
+          if (type == HomeCardType.warning) {
+            return BorderSide(color: colorScheme.error);
+          }
           if (type == HomeCardType.filled) {
             return BorderSide.none;
           }
@@ -56,7 +65,9 @@ extension HomeCardPadding on Widget {
       onPressed: onPressed,
       child: DefaultTextStyle(
         style: TextStyle(
-          color: Theme.of(context).brightness == Brightness.dark
+          color: type == HomeCardType.warning
+              ? Theme.of(context).colorScheme.onErrorContainer
+              : Theme.of(context).brightness == Brightness.dark
               ? Theme.of(context).colorScheme.onSurface
               : Theme.of(context).colorScheme.onSurfaceVariant,
         ),
diff --git a/lib/page/homepage/info_widget/energy_card.dart b/lib/page/homepage/info_widget/energy_card.dart
index 485a328c..076015a2 100644
--- a/lib/page/homepage/info_widget/energy_card.dart
+++ b/lib/page/homepage/info_widget/energy_card.dart
@@ -9,10 +9,14 @@ import 'package:intl/intl.dart';
 import 'package:ming_cute_icons/ming_cute_icons.dart';
 import 'package:signals/signals_flutter.dart';
 import 'package:watermeter/controller/energy_controller.dart';
+import 'package:watermeter/page/homepage/home_card_padding.dart';
 import 'package:watermeter/page/homepage/main_page_card.dart';
 import 'package:watermeter/page/public_widget/context_extension.dart';
+import 'package:watermeter/repository/preference.dart' as preference;
 import 'package:watermeter/routing/routes.dart';
 
+const int _defaultLowElectricityWarningThreshold = 20;
+
 class EnergyCard extends StatelessWidget {
   const EnergyCard({super.key});
 
@@ -23,6 +27,28 @@ class EnergyCard extends StatelessWidget {
       builder: (context) {
         final state = controller.energyInfoStateSignal.value;
         final displayInfo = controller.displayEnergyInfo.value;
+        final lowElectricityWarningEnabled =
+            !preference.contains(
+              preference.Preference.lowElectricityWarningEnabled,
+            ) ||
+            preference.getBool(
+              preference.Preference.lowElectricityWarningEnabled,
+            );
+        final lowElectricityWarningThreshold =
+            preference.contains(
+              preference.Preference.lowElectricityWarningThreshold,
+            )
+            ? preference.getInt(
+                preference.Preference.lowElectricityWarningThreshold,
+              )
+            : _defaultLowElectricityWarningThreshold;
+        final effectiveThreshold = lowElectricityWarningThreshold > 0
+            ? lowElectricityWarningThreshold
+            : _defaultLowElectricityWarningThreshold;
+        final lowElectricityWarning =
+            displayInfo != null &&
+            lowElectricityWarningEnabled &&
+            displayInfo.electricityRemain < effectiveThreshold;
 
         return MainPageCard(
           onPressed: () async {
@@ -30,6 +56,9 @@ class EnergyCard extends StatelessWidget {
           },
           isLoad: state.isLoading && displayInfo == null,
           icon: MingCuteIcons.mgc_flash_line,
+          type: lowElectricityWarning
+              ? HomeCardType.warning
+              : HomeCardType.plain,
           text: FlutterI18n.translate(
             context,
             "homepage.electricity_card.title",
diff --git a/lib/page/homepage/main_page_card.dart b/lib/page/homepage/main_page_card.dart
index 1ea160d6..03161a7c 100644
--- a/lib/page/homepage/main_page_card.dart
+++ b/lib/page/homepage/main_page_card.dart
@@ -14,6 +14,7 @@ class MainPageCard extends StatelessWidget {
   final Widget bottomText;
   final Widget? rightButton;
   final bool? isBold;
+  final HomeCardType type;
   final void Function()? onPressed;
   const MainPageCard({
     super.key,
@@ -26,19 +27,25 @@ class MainPageCard extends StatelessWidget {
     this.rightButton,
     this.progress,
     this.isBold,
+    this.type = HomeCardType.plain,
   });
 
   @override
   Widget build(BuildContext context) {
+    final textColor = type == HomeCardType.warning
+        ? Theme.of(context).colorScheme.onErrorContainer
+        : Theme.of(context).brightness == Brightness.dark
+        ? Theme.of(context).colorScheme.onSurface
+        : Theme.of(context).colorScheme.onSurfaceVariant;
     return ListTile(
       leading: Icon(
         icon,
         size: 32,
-        color: Theme.of(context).colorScheme.primary,
+        color: type == HomeCardType.warning
+            ? Theme.of(context).colorScheme.onErrorContainer
+            : Theme.of(context).colorScheme.primary,
       ),
-      textColor: Theme.of(context).brightness == Brightness.dark
-          ? Theme.of(context).colorScheme.onSurface
-          : Theme.of(context).colorScheme.onSurfaceVariant,
+      textColor: textColor,
       title: infoText,
       subtitle: Builder(
         builder: (context) {
@@ -57,6 +64,6 @@ class MainPageCard extends StatelessWidget {
         },
       ),
       trailing: rightButton,
-    ).withHomeCardStyle(context, onPressed: onPressed);
+    ).withHomeCardStyle(context, onPressed: onPressed, type: type);
   }
 }
diff --git a/lib/page/library/book_detail_card.dart b/lib/page/library/book_detail_card.dart
index 1b933938..62db52bc 100644
--- a/lib/page/library/book_detail_card.dart
+++ b/lib/page/library/book_detail_card.dart
@@ -2,15 +2,14 @@
 // Copyright 2025 Traintime PDA authors.
 // SPDX-License-Identifier: MPL-2.0
 
-import 'package:cached_network_image/cached_network_image.dart';
-import 'package:dio/dio.dart';
 import 'package:flutter/material.dart';
 import 'package:flutter_i18n/flutter_i18n.dart';
 import 'package:styled_widget/styled_widget.dart';
 import 'package:watermeter/model/xidian_ids/library.dart';
+import 'package:watermeter/page/library/book_info_card.dart';
 import 'package:watermeter/page/library/book_place_card.dart';
 import 'package:watermeter/page/library/ebook_place_card.dart';
-import 'package:watermeter/repository/logger.dart';
+import 'package:watermeter/repository/xidian_ids/library_session.dart';
 
 class BookDetailCard extends StatefulWidget {
   final BookInfo toUse;
@@ -22,6 +21,11 @@ class BookDetailCard extends StatefulWidget {
 }
 
 class _BookDetailCardState extends State<BookDetailCard> {
+  late final Future<List<BookLocation>> _locationsFuture =
+      widget.toUse.items != null
+      ? Future.value(widget.toUse.items!)
+      : LibrarySession().bookLocations(widget.toUse.docNumber);
+
   @override
   Widget build(BuildContext context) {
     return ListView(
@@ -30,33 +34,7 @@ class _BookDetailCardState extends State<BookDetailCard> {
         Row(
           mainAxisAlignment: MainAxisAlignment.spaceBetween,
           children: [
-            CachedNetworkImage(
-                  imageUrl: widget.toUse.imageUrl ?? "",
-                  placeholder: (context, url) => Image.asset(
-                    "assets/art/pda_empty_cover.jpg",
-                    width: 120,
-                    height: 150,
-                    fit: BoxFit.fill,
-                  ),
-                  errorWidget: (context, url, error) => Image.asset(
-                    "assets/art/pda_empty_cover.jpg",
-                    width: 120,
-                    height: 150,
-                    fit: BoxFit.fill,
-                  ),
-                  width: 120,
-                  height: 150,
-                  fit: BoxFit.fitHeight,
-                  alignment: Alignment.center,
-                  errorListener: (e) {
-                    if (e is DioException) {
-                      log.info('Error with Internet error...');
-                    } else {
-                      log.info('Image Exception is: ${e.runtimeType}');
-                    }
-                  },
-                )
-                //.clipRect(clipper: BookImageClipper())
+            BookCover(toUse: widget.toUse, width: 120, height: 150)
                 .clipRRect(all: 14)
                 .padding(all: 2)
                 .decorated(
@@ -212,30 +190,31 @@ class _BookDetailCardState extends State<BookDetailCard> {
                       ],
                     ),
                   ),
-                  Text.rich(
-                    TextSpan(
-                      children: [
-                        TextSpan(
-                          text: FlutterI18n.translate(
-                            context,
-                            "library.arrangement_code",
-                          ),
-                          style: const TextStyle(
-                            fontSize: 14,
-                            fontWeight: FontWeight.w600,
-                            color: Color(0xFFBFBFBF),
-                          ),
-                        ),
-                        TextSpan(
-                          text: widget.toUse.barCodesStr,
-                          style: const TextStyle(
-                            fontSize: 14,
-                            fontWeight: FontWeight.w600,
-                          ),
-                        ),
-                      ],
+                  if (widget.toUse.hasBarCodes)
+                    Text.rich(
+                      TextSpan(
+                        children: [
+                          TextSpan(
+                            text: FlutterI18n.translate(
+                              context,
+                              "library.arrangement_code",
+                            ),
+                            style: const TextStyle(
+                              fontSize: 14,
+                              fontWeight: FontWeight.w600,
+                              color: Color(0xFFBFBFBF),
+                            ),
+                          ),
+                          TextSpan(
+                            text: widget.toUse.barCodesStr,
+                            style: const TextStyle(
+                              fontSize: 14,
+                              fontWeight: FontWeight.w600,
+                            ),
+                          ),
+                        ],
+                      ),
                     ),
-                  ),
                 ]
                 .toColumn(crossAxisAlignment: CrossAxisAlignment.stretch)
                 .flexible(),
@@ -243,20 +222,30 @@ class _BookDetailCardState extends State<BookDetailCard> {
         ),
         Padding(
           padding: const EdgeInsets.symmetric(vertical: 10),
-          child: Column(
-            crossAxisAlignment: CrossAxisAlignment.stretch,
-            children: [
-              if (widget.toUse.items != null)
-                ...List.generate(
-                  widget.toUse.items!.length,
-                  (index) => BookPlaceCard(toUse: widget.toUse.items![index]),
-                ),
-              if (widget.toUse.eitems != null)
-                ...List.generate(
-                  widget.toUse.eitems!.length,
-                  (index) => EBookPlaceCard(toUse: widget.toUse.eitems![index]),
-                ),
-            ],
+          child: FutureBuilder<List<BookLocation>>(
+            future: _locationsFuture,
+            builder: (context, snapshot) {
+              final locations = snapshot.data ?? const <BookLocation>[];
+              return Column(
+                crossAxisAlignment: CrossAxisAlignment.stretch,
+                children: [
+                  if (snapshot.connectionState == ConnectionState.waiting)
+                    const Center(
+                      child: CircularProgressIndicator(),
+                    ).padding(vertical: 12),
+                  ...List.generate(
+                    locations.length,
+                    (index) => BookPlaceCard(toUse: locations[index]),
+                  ),
+                  if (widget.toUse.eitems != null)
+                    ...List.generate(
+                      widget.toUse.eitems!.length,
+                      (index) =>
+                          EBookPlaceCard(toUse: widget.toUse.eitems![index]),
+                    ),
+                ],
+              );
+            },
           ),
         ),
       ],
diff --git a/lib/page/library/book_info_card.dart b/lib/page/library/book_info_card.dart
index 70feb156..a735ea8a 100644
--- a/lib/page/library/book_info_card.dart
+++ b/lib/page/library/book_info_card.dart
@@ -11,6 +11,7 @@ import 'package:flutter_i18n/flutter_i18n.dart';
 import 'package:styled_widget/styled_widget.dart';
 import 'package:watermeter/model/xidian_ids/library.dart';
 import 'package:watermeter/repository/logger.dart';
+import 'package:watermeter/repository/xidian_ids/library_session.dart';
 
 class BookInfoCard extends StatelessWidget {
   final BookInfo toUse;
@@ -19,36 +20,14 @@ class BookInfoCard extends StatelessWidget {
   @override
   Widget build(BuildContext context) {
     return [
-      CachedNetworkImage(
-        imageUrl: toUse.imageUrl ?? "",
-        placeholder: (context, url) => Image.asset(
-          "assets/art/pda_empty_cover.jpg",
-          width: 176 * 0.6,
-          height: 250 * 0.6,
-          fit: BoxFit.fill,
-        ),
-        errorWidget: (context, url, error) => Image.asset(
-          "assets/art/pda_empty_cover.jpg",
-          width: 176 * 0.6,
-          height: 250 * 0.6,
-          fit: BoxFit.fill,
-        ),
-        width: 176 * 0.6,
-        height: 250 * 0.6,
-        fit: BoxFit.fitHeight,
-        alignment: Alignment.center,
-        errorListener: (e) {
-          if (e is DioException) {
-            log.info('Error with Internet error...');
-          } else {
-            log.info('Image Exception is: ${e.runtimeType}');
-          }
-        },
+      BookCover(
+        key: ValueKey(toUse.docNumber),
+        toUse: toUse,
       ).clipRRect(all: 14),
-      const VerticalDivider(color: Colors.transparent),
+      const SizedBox(width: 10),
       [
             Text(
-              '${toUse.bookName}\n',
+              toUse.bookName,
               maxLines: 2,
               overflow: TextOverflow.ellipsis,
               textAlign: TextAlign.start,
@@ -164,10 +143,10 @@ class BookInfoCard extends StatelessWidget {
                   TextSpan(
                     children: [
                       TextSpan(
-                        text: toUse.items?.length.toString() ?? "0",
+                        text: toUse.totalStorage?.toString() ?? "0",
                         style: TextStyle(
                           fontSize: 24,
-                          color: (toUse.items?.length ?? 0) > 0
+                          color: (toUse.totalStorage ?? 0) > 0
                               ? Colors.green
                               : Colors.yellow,
                           fontWeight: FontWeight.w600,
@@ -193,3 +172,95 @@ class BookInfoCard extends StatelessWidget {
     ].toRow().padding(all: 12).card(elevation: 0);
   }
 }
+
+class BookCover extends StatefulWidget {
+  final BookInfo toUse;
+  final double width;
+  final double height;
+
+  const BookCover({
+    super.key,
+    required this.toUse,
+    this.width = 176 * 0.6,
+    this.height = 250 * 0.6,
+  });
+
+  @override
+  State<BookCover> createState() => _BookCoverState();
+}
+
+class _BookCoverState extends State<BookCover> {
+  late Future<String> _coverFuture;
+
+  @override
+  void initState() {
+    super.initState();
+    _coverFuture = _loadCover();
+  }
+
+  @override
+  void didUpdateWidget(covariant BookCover oldWidget) {
+    super.didUpdateWidget(oldWidget);
+    if (oldWidget.toUse.docNumber != widget.toUse.docNumber ||
+        oldWidget.toUse.bookName != widget.toUse.bookName ||
+        oldWidget.toUse.isbn != widget.toUse.isbn ||
+        oldWidget.toUse.imageUrl != widget.toUse.imageUrl) {
+      _coverFuture = _loadCover();
+    }
+  }
+
+  Future<String> _loadCover() {
+    final imageUrl = widget.toUse.imageUrl;
+    if (imageUrl != null && imageUrl.isNotEmpty) {
+      return Future.value(imageUrl);
+    }
+    return LibrarySession().bookCover(
+      widget.toUse.bookName,
+      widget.toUse.isbn ?? "",
+      widget.toUse.docNumber,
+    );
+  }
+
+  @override
+  Widget build(BuildContext context) {
+    return FutureBuilder<String>(
+      future: _coverFuture,
+      builder: (context, snapshot) {
+        final url = snapshot.data ?? "";
+        if (url.isEmpty) {
+          return _emptyCover();
+        }
+        widget.toUse.imageUrl = url;
+        return _networkCover(url);
+      },
+    );
+  }
+
+  Widget _networkCover(String url) {
+    return CachedNetworkImage(
+      imageUrl: url,
+      placeholder: (context, url) => _emptyCover(),
+      errorWidget: (context, url, error) => _emptyCover(),
+      width: widget.width,
+      height: widget.height,
+      fit: BoxFit.fitHeight,
+      alignment: Alignment.center,
+      errorListener: (e) {
+        if (e is DioException) {
+          log.info('Error with Internet error...');
+        } else {
+          log.info('Image Exception is: ${e.runtimeType}');
+        }
+      },
+    );
+  }
+
+  Widget _emptyCover() {
+    return Image.asset(
+      "assets/art/pda_empty_cover.jpg",
+      width: widget.width,
+      height: widget.height,
+      fit: BoxFit.fill,
+    );
+  }
+}
diff --git a/lib/page/library/book_place_card.dart b/lib/page/library/book_place_card.dart
index 493473d7..49ee5b90 100644
--- a/lib/page/library/book_place_card.dart
+++ b/lib/page/library/book_place_card.dart
@@ -30,6 +30,7 @@ class BookPlaceCard extends StatelessWidget {
             Text(
               toUse.locationName ??
                   FlutterI18n.translate(context, "library.not_provided"),
+              softWrap: true,
               style: TextStyle(
                 fontWeight: FontWeight.w400,
                 fontSize: 16,
@@ -37,7 +38,7 @@ class BookPlaceCard extends StatelessWidget {
                     ? Colors.green.shade900
                     : Colors.red.shade900,
               ),
-            ),
+            ).expanded(),
           ].toRow(),
           const SizedBox(height: 8),
           Text(
@@ -56,6 +57,7 @@ class BookPlaceCard extends StatelessWidget {
                   ? Colors.green.shade900
                   : Colors.red.shade900,
             ),
+            softWrap: true,
           ),
         ]
         .toColumn(crossAxisAlignment: CrossAxisAlignment.start)
diff --git a/lib/page/library/search_book_window.dart b/lib/page/library/search_book_window.dart
index 50aa0e51..5e25796e 100644
--- a/lib/page/library/search_book_window.dart
+++ b/lib/page/library/search_book_window.dart
@@ -7,7 +7,6 @@ import 'package:watermeter/page/public_widget/both_side_sheet.dart';
 import 'package:infinite_scroll_pagination/infinite_scroll_pagination.dart';
 import 'package:flutter/material.dart';
 import 'package:styled_widget/styled_widget.dart';
-// import 'package:watermeter/page/public_widget/empty_list_view.dart';
 import 'package:watermeter/page/public_widget/public_widget.dart';
 import 'package:watermeter/repository/xidian_ids/library_session.dart'
     as search_book;
@@ -15,61 +14,12 @@ import 'package:watermeter/model/xidian_ids/library.dart';
 import 'package:watermeter/page/library/book_detail_card.dart';
 import 'package:watermeter/page/library/book_info_card.dart';
 
-enum SearchField { keyWord, title, author, isbn, barcode, callNo }
-
-extension SearchFieldExtension on SearchField {
-  String get apiValue {
-    switch (this) {
-      case SearchField.keyWord:
-        return "keyWord";
-      case SearchField.title:
-        return "title";
-      case SearchField.isbn:
-        return "isbn";
-      case SearchField.author:
-        return "author";
-      case SearchField.barcode:
-        return "barcode";
-      case SearchField.callNo:
-        return "callNo";
-    }
-  }
+const double _searchPanelMaxWidth = 760;
+const double _resultCardMaxWidth = 500;
 
-  String getLabel(BuildContext context) {
-    switch (this) {
-      case SearchField.keyWord:
-        return FlutterI18n.translate(
-          context,
-          "library.search_field_keyword_option",
-        );
-      case SearchField.title:
-        return FlutterI18n.translate(
-          context,
-          "library.search_field_title_option",
-        );
-      case SearchField.isbn:
-        return FlutterI18n.translate(
-          context,
-          "library.search_field_isbn_option",
-        );
-      case SearchField.author:
-        return FlutterI18n.translate(
-          context,
-          "library.search_field_author_option",
-        );
-      case SearchField.barcode:
-        return FlutterI18n.translate(
-          context,
-          "library.search_field_barcode_option",
-        );
-      case SearchField.callNo:
-        return FlutterI18n.translate(
-          context,
-          "library.search_field_callno_option",
-        );
-    }
-  }
-}
+enum SearchPanelMode { normal, advanced }
+
+typedef _SearchOption = search_book.LibrarySearchOption;
 
 class SearchBookWindow extends StatefulWidget {
   const SearchBookWindow({super.key});
@@ -85,167 +35,668 @@ class _SearchBookWindowState extends State<SearchBookWindow>
         getNextPageKey: (state) =>
             state.lastPageIsEmpty ? null : state.nextIntPageKey,
 
-        fetchPage: (pageKey) => search_book.LibrarySession().searchBook(
-          search,
-          pageKey,
-          searchField: selectedSearchField.apiValue,
-        ),
+        fetchPage: _fetchPage,
       );
 
-  String search = '';
-  SearchField selectedSearchField = SearchField.keyWord;
+  bool _useAdvancedSearch = false;
+  String _normalSearch = "";
+  String _advancedSearch = "";
+  String _normalSearchField = "keyWord";
+  String _advancedSearchField = "keyWord";
+  String _advancedMatchMode = "2";
+  String _documentType = "";
+  String _resourceType = "";
+  String _campusId = "";
+  String _locationId = "";
+  String _countryCode = "";
+  String _languageCode = "";
+  String _publishBegin = "";
+  String _publishEnd = "";
+  bool _onlyOnShelf = false;
+  SearchPanelMode _searchMode = SearchPanelMode.normal;
+  bool _hasSearched = false;
+  bool _advancedPanelCollapsed = false;
+  late final Future<search_book.LibrarySearchFilterOptions>
+  _filterOptionsFuture = search_book.LibrarySession().searchFilterOptions();
 
   @override
   bool get wantKeepAlive => true;
 
-  late final TextEditingController _textEditingController =
-      TextEditingController.fromValue(TextEditingValue(text: search));
+  late final TextEditingController _normalTextController =
+      TextEditingController.fromValue(TextEditingValue(text: _normalSearch));
+  late final TextEditingController _advancedTextController =
+      TextEditingController.fromValue(TextEditingValue(text: _advancedSearch));
 
   @override
   void dispose() {
-    _textEditingController.dispose();
+    _normalTextController.dispose();
+    _advancedTextController.dispose();
     _pagingController.dispose();
     super.dispose();
   }
 
+  Future<List<BookInfo>> _fetchPage(int pageKey) {
+    final session = search_book.LibrarySession();
+    if (_useAdvancedSearch) {
+      return session.advancedSearchBook(
+        _advancedSearch,
+        pageKey,
+        searchField: _advancedSearchField,
+        matchMode: _advancedMatchMode,
+        docCode: _emptyToNull(_documentType),
+        resourceType: _emptyToNull(_resourceType),
+        campusId: _intFilter(_campusId),
+        locationId: _intFilter(_locationId),
+        countryCode: _emptyToNull(_countryCode),
+        langCode: _emptyToNull(_languageCode),
+        onlyOnShelf: _onlyOnShelf ? true : null,
+        publishBegin: _publishBegin,
+        publishEnd: _publishEnd,
+      );
+    }
+    return session.searchBook(
+      _normalSearch,
+      pageKey,
+      searchField: _normalSearchField,
+    );
+  }
+
+  void _submitNormalSearch() {
+    FocusScope.of(context).unfocus();
+    setState(() {
+      _useAdvancedSearch = false;
+      _normalSearch = _normalTextController.text.trim();
+      _hasSearched = true;
+    });
+    _pagingController.refresh();
+  }
+
+  String? _emptyToNull(String value) => value.isEmpty ? null : value;
+
+  int? _intFilter(String value) => value.isEmpty ? null : int.tryParse(value);
+
+  void _resetAdvancedSearch() {
+    setState(() {
+      _advancedSearch = "";
+      _advancedTextController.clear();
+      _advancedSearchField = "keyWord";
+      _advancedMatchMode = "2";
+      _documentType = "";
+      _resourceType = "";
+      _campusId = "";
+      _locationId = "";
+      _countryCode = "";
+      _languageCode = "";
+      _publishBegin = "";
+      _publishEnd = "";
+      _onlyOnShelf = false;
+    });
+  }
+
+  void _submitAdvancedSearch() {
+    FocusScope.of(context).unfocus();
+    setState(() {
+      _useAdvancedSearch = true;
+      _advancedSearch = _advancedTextController.text.trim();
+      _hasSearched = true;
+    });
+    _pagingController.refresh();
+  }
+
   @override
   Widget build(BuildContext context) {
     super.build(context);
     return Scaffold(
       body: Column(
         children: [
-          // Search field selector and input
-          Row(
-            mainAxisAlignment: MainAxisAlignment.center,
-            children: [
-              TextFormField(
-                controller: _textEditingController,
-                decoration: InputDecoration(
-                  hintText: FlutterI18n.translate(
-                    context,
-                    "library.search_here",
-                  ),
-                  prefixIcon: Icon(
-                    Icons.search,
-                    color: Theme.of(context).colorScheme.primary,
-                  ),
-                  border: OutlineInputBorder(
-                    borderRadius: BorderRadius.circular(12),
+          _buildSearchArea(context)
+              .padding(horizontal: 8, vertical: 4)
+              .constrained(maxWidth: _searchPanelMaxWidth),
+          if (_hasSearched) _buildResultList().expanded(),
+        ],
+      ),
+    );
+  }
+
+  Widget _buildResultList() {
+    return PagingListener(
+      controller: _pagingController,
+      builder: (context, state, fetchNextPage) => LayoutBuilder(
+        builder: (context, constraints) {
+          final crossAxisCount = constraints.maxWidth < _resultCardMaxWidth * 2
+              ? 1
+              : constraints.maxWidth ~/ _resultCardMaxWidth;
+          return PagedMasonryGridView<int, BookInfo>.count(
+            state: state,
+            fetchNextPage: fetchNextPage,
+            padding: const EdgeInsets.symmetric(horizontal: 8, vertical: 8),
+            crossAxisCount: crossAxisCount,
+            mainAxisSpacing: 4,
+            crossAxisSpacing: 4,
+            builderDelegate: PagedChildBuilderDelegate<BookInfo>(
+              itemBuilder: (context, item, index) =>
+                  GestureDetector(
+                        child: BookInfoCard(toUse: item),
+                        onTap: () => _openBookDetail(item),
+                      )
+                      .padding(horizontal: 12, vertical: 2)
+                      .width(double.infinity)
+                      .constrained(width: _resultCardMaxWidth)
+                      .center(),
+              firstPageProgressIndicatorBuilder: (context) =>
+                  const Center(child: CircularProgressIndicator()),
+              firstPageErrorIndicatorBuilder: (context) => ReloadWidget(
+                function: () async => _pagingController.refresh(),
+                errorStatus: _pagingController.error,
+              ),
+              noItemsFoundIndicatorBuilder: (context) => Center(
+                child: Padding(
+                  padding: const EdgeInsets.symmetric(
+                    vertical: 32,
+                    horizontal: 16,
                   ),
-                  filled: false,
-                  contentPadding: const EdgeInsets.symmetric(
-                    horizontal: 12,
-                    vertical: 10,
+                  child: Column(
+                    mainAxisSize: MainAxisSize.min,
+                    children: [
+                      Icon(Icons.search, size: 96.0),
+                      const SizedBox(height: 16),
+                      Text(
+                        FlutterI18n.translate(context, "library.no_result"),
+                        textAlign: TextAlign.center,
+                      ),
+                    ],
                   ),
                 ),
-                onChanged: (String textFieldValue) => search = textFieldValue,
-                onFieldSubmitted: (value) {
-                  _pagingController.refresh();
-                },
-              ).flexible(flex: 2),
-              const SizedBox(width: 8),
-              DropdownButtonHideUnderline(
-                child: DropdownButton<SearchField>(
-                  value: selectedSearchField,
-                  items: SearchField.values
-                      .map(
-                        (SearchField field) => DropdownMenuItem<SearchField>(
-                          value: field,
-                          child: Text(field.getLabel(context)),
+              ),
+              noMoreItemsIndicatorBuilder: (context) =>
+                  [
+                        Icon(Icons.sentiment_very_satisfied, size: 32),
+                        SizedBox(width: 8),
+                        Text(
+                          "That's all folks!",
+                          style: Theme.of(context).textTheme.titleLarge,
                         ),
-                      )
-                      .toList(),
-                  onChanged: (SearchField? newValue) {
-                    if (newValue != null) {
-                      setState(() {
-                        selectedSearchField = newValue;
-                      });
-                      _pagingController.refresh();
-                    }
-                  },
-                ),
-              ).flexible(),
-            ],
-          ).padding(vertical: 8).constrained(maxWidth: sheetMaxWidth),
-          PagingListener(
-            controller: _pagingController,
-            builder: (context, state, fetchNextPage) => LayoutBuilder(
-              builder: (context, constraints) =>
-                  PagedMasonryGridView<int, BookInfo>.count(
-                    state: state,
-                    fetchNextPage: fetchNextPage,
-                    padding: const EdgeInsets.symmetric(
-                      horizontal: 8,
-                      vertical: 8,
-                    ),
-                    crossAxisCount: constraints.maxWidth ~/ 360,
-                    mainAxisSpacing: 4,
-                    crossAxisSpacing: 4,
-                    builderDelegate: PagedChildBuilderDelegate<BookInfo>(
-                      itemBuilder: (context, item, index) =>
-                          GestureDetector(
-                                child: BookInfoCard(toUse: item),
-                                onTap: () => BothSideSheet.show(
-                                  context: context,
-                                  title: FlutterI18n.translate(
-                                    context,
-                                    "library.book_detail",
-                                  ),
-                                  child: BookDetailCard(toUse: item),
-                                ),
-                              )
-                              .padding(horizontal: 12, vertical: 2)
-                              .width(double.infinity)
-                              .constrained(width: sheetMaxWidth)
-                              .center(),
-                      firstPageProgressIndicatorBuilder: (context) =>
-                          const Center(child: CircularProgressIndicator()),
-                      firstPageErrorIndicatorBuilder: (context) => ReloadWidget(
-                        function: () async => _pagingController.refresh(),
-                        errorStatus: _pagingController.error,
-                      ),
-                      noItemsFoundIndicatorBuilder: (context) => Center(
-                        child: Padding(
-                          padding: const EdgeInsets.symmetric(
-                            vertical: 32,
-                            horizontal: 16,
-                          ),
-                          child: Column(
-                            mainAxisSize: MainAxisSize.min,
-                            children: [
-                              Icon(Icons.search, size: 96.0),
-                              const SizedBox(height: 16),
-                              Text(
-                                FlutterI18n.translate(
-                                  context,
-                                  "library.no_result",
-                                ),
-                                textAlign: TextAlign.center,
-                              ),
-                            ],
-                          ),
-                        ),
-                      ),
-                      noMoreItemsIndicatorBuilder: (context) =>
-                          [
-                                Icon(Icons.sentiment_very_satisfied, size: 32),
-                                SizedBox(width: 8),
-                                Text(
-                                  "That's all folks!",
-                                  style: Theme.of(context).textTheme.titleLarge,
-                                ),
-                              ]
-                              .toRow(
-                                mainAxisAlignment: MainAxisAlignment.center,
-                              )
-                              .padding(vertical: 12)
-                              .center(),
-                    ),
-                  ),
+                      ]
+                      .toRow(mainAxisAlignment: MainAxisAlignment.center)
+                      .padding(vertical: 12)
+                      .center(),
+            ),
+          );
+        },
+      ),
+    );
+  }
+
+  Future<void> _openBookDetail(BookInfo item) async {
+    FocusManager.instance.primaryFocus?.unfocus();
+    await BothSideSheet.show(
+      context: context,
+      title: FlutterI18n.translate(context, "library.book_detail"),
+      child: BookDetailCard(toUse: item),
+    );
+  }
+
+  Widget _buildSearchArea(BuildContext context) {
+    return FutureBuilder<search_book.LibrarySearchFilterOptions>(
+      future: _filterOptionsFuture,
+      builder: (context, snapshot) {
+        final options =
+            snapshot.data ?? search_book.LibrarySearchFilterOptions.fallback();
+        return _SearchBlock(
+          header: _buildSearchModeSwitch(context),
+          collapsed:
+              _searchMode == SearchPanelMode.advanced &&
+              _advancedPanelCollapsed,
+          child: LayoutBuilder(
+            builder: (context, constraints) {
+              if (_searchMode == SearchPanelMode.advanced) {
+                return _buildAdvancedSearchFields(
+                  context,
+                  constraints.maxWidth,
+                  options,
+                );
+              }
+              return _buildNormalSearchFields(
+                context,
+                constraints.maxWidth,
+                options,
+              );
+            },
+          ),
+        );
+      },
+    );
+  }
+
+  List<_SearchOption> _matchModeOptions(BuildContext context) => [
+    search_book.LibrarySearchOption(
+      "1",
+      FlutterI18n.translate(context, "library.match_exact"),
+      "精确",
+    ),
+    search_book.LibrarySearchOption(
+      "2",
+      FlutterI18n.translate(context, "library.match_fuzzy"),
+      "模糊",
+    ),
+    search_book.LibrarySearchOption(
+      "3",
+      FlutterI18n.translate(context, "library.match_prefix"),
+      "前方",
+    ),
+  ];
+
+  Widget _buildSearchFieldDropdown({
+    required BuildContext context,
+    required String value,
+    required List<_SearchOption> options,
+    required ValueChanged<String> onChanged,
+    int selectedMaxLines = 2,
+  }) {
+    return _buildOptionDropdown(
+      context,
+      label: FlutterI18n.translate(context, "library.search_field_title"),
+      value: value,
+      options: options,
+      selectedMaxLines: selectedMaxLines,
+      onChanged: onChanged,
+    );
+  }
+
+  Widget _buildSearchModeSwitch(BuildContext context) {
+    final colorScheme = Theme.of(context).colorScheme;
+    return Row(
+      children: [
+        ToggleButtons(
+          isSelected: [
+            _searchMode == SearchPanelMode.normal,
+            _searchMode == SearchPanelMode.advanced,
+          ],
+          borderRadius: BorderRadius.circular(10),
+          constraints: const BoxConstraints.tightFor(width: 76, height: 34),
+          selectedColor: colorScheme.onPrimary,
+          fillColor: colorScheme.primary,
+          color: colorScheme.primary,
+          onPressed: (index) {
+            setState(() {
+              _searchMode = index == 0
+                  ? SearchPanelMode.normal
+                  : SearchPanelMode.advanced;
+            });
+          },
+          children: [
+            Text(FlutterI18n.translate(context, "library.normal_search")),
+            Text(FlutterI18n.translate(context, "library.advanced_search")),
+          ],
+        ),
+        const Spacer(),
+        if (_searchMode == SearchPanelMode.advanced)
+          IconButton(
+            visualDensity: VisualDensity.compact,
+            onPressed: () => setState(
+              () => _advancedPanelCollapsed = !_advancedPanelCollapsed,
+            ),
+            icon: Icon(
+              _advancedPanelCollapsed
+                  ? Icons.keyboard_arrow_down
+                  : Icons.keyboard_arrow_up,
             ),
-          ).expanded(),
+            tooltip: _advancedPanelCollapsed ? "展开条件" : "收起条件",
+          ),
+      ],
+    );
+  }
+
+  Widget _buildAdvancedSearchInput(BuildContext context) {
+    return Row(
+      children: [
+        Expanded(
+          child: TextFormField(
+            controller: _advancedTextController,
+            decoration: _inputDecoration(
+              context,
+              FlutterI18n.translate(context, "library.search_here"),
+              prefixIcon: Icons.manage_search,
+            ),
+            onFieldSubmitted: (_) => _submitAdvancedSearch(),
+          ),
+        ),
+        const SizedBox(width: 8),
+        IconButton.filled(
+          onPressed: _submitAdvancedSearch,
+          icon: const Icon(Icons.manage_search),
+          tooltip: FlutterI18n.translate(context, "library.search"),
+        ),
+      ],
+    );
+  }
+
+  Widget _buildNormalSearchFields(
+    BuildContext context,
+    double maxWidth,
+    search_book.LibrarySearchFilterOptions options,
+  ) {
+    return Row(
+      children: [
+        SizedBox(
+          width: maxWidth < 430 ? 128 : 152,
+          child: _buildSearchFieldDropdown(
+            context: context,
+            value: _normalSearchField,
+            options: options.searchFields,
+            selectedMaxLines: 1,
+            onChanged: (value) => setState(() => _normalSearchField = value),
+          ),
+        ),
+        const SizedBox(width: 8),
+        Expanded(
+          child: TextFormField(
+            controller: _normalTextController,
+            decoration: _inputDecoration(
+              context,
+              FlutterI18n.translate(context, "library.search_here"),
+              prefixIcon: Icons.search,
+            ),
+            onFieldSubmitted: (_) => _submitNormalSearch(),
+          ),
+        ),
+        const SizedBox(width: 8),
+        IconButton.filled(
+          onPressed: _submitNormalSearch,
+          icon: const Icon(Icons.search),
+          tooltip: FlutterI18n.translate(context, "library.search"),
+        ),
+      ],
+    );
+  }
+
+  Widget _buildAdvancedSearchFields(
+    BuildContext context,
+    double maxWidth,
+    search_book.LibrarySearchFilterOptions options,
+  ) {
+    return [
+      _SearchFields(
+        maxWidth: maxWidth,
+        columnCount: 2,
+        children: [
+          _buildSearchFieldDropdown(
+            context: context,
+            value: _advancedSearchField,
+            options: options.searchFields,
+            onChanged: (value) => setState(() => _advancedSearchField = value),
+          ),
+          _buildOptionDropdown(
+            context,
+            label: FlutterI18n.translate(context, "library.match_mode"),
+            value: _advancedMatchMode,
+            options: _matchModeOptions(context),
+            onChanged: (value) => setState(() => _advancedMatchMode = value),
+          ),
+          _buildOptionDropdown(
+            context,
+            label: "资料类型",
+            value: _documentType,
+            options: options.documentTypes,
+            onChanged: (value) => setState(() => _documentType = value),
+          ),
+          _buildOptionDropdown(
+            context,
+            label: "资源类型",
+            value: _resourceType,
+            options: options.resourceTypes,
+            onChanged: (value) => setState(() => _resourceType = value),
+          ),
+          _buildOptionDropdown(
+            context,
+            label: "校区",
+            value: _campusId,
+            options: options.campuses,
+            onChanged: (value) => setState(() => _campusId = value),
+          ),
+          _buildOptionDropdown(
+            context,
+            label: "馆藏地",
+            value: _locationId,
+            options: options.locations,
+            onChanged: (value) => setState(() => _locationId = value),
+          ),
+          _buildOptionDropdown(
+            context,
+            label: "国别",
+            value: _countryCode,
+            options: options.countries,
+            onChanged: (value) => setState(() => _countryCode = value),
+          ),
+          _buildOptionDropdown(
+            context,
+            label: "语种",
+            value: _languageCode,
+            options: options.languages,
+            onChanged: (value) => setState(() => _languageCode = value),
+          ),
+          _buildOptionDropdown(
+            context,
+            label: "出版起始年",
+            value: _publishBegin,
+            options: options.years,
+            onChanged: (value) => setState(() => _publishBegin = value),
+          ),
+          _buildOptionDropdown(
+            context,
+            label: "出版结束年",
+            value: _publishEnd,
+            options: options.years,
+            onChanged: (value) => setState(() => _publishEnd = value),
+          ),
+          CheckboxListTile(
+            value: _onlyOnShelf,
+            dense: true,
+            visualDensity: VisualDensity.compact,
+            contentPadding: EdgeInsets.zero,
+            controlAffinity: ListTileControlAffinity.leading,
+            title: const Text("仅看在架", overflow: TextOverflow.ellipsis),
+            onChanged: (value) => setState(() => _onlyOnShelf = value ?? false),
+          ),
+          OutlinedButton.icon(
+            onPressed: _resetAdvancedSearch,
+            icon: const Icon(Icons.clear),
+            label: const Text("清除"),
+          ).height(56),
         ],
       ),
+      const SizedBox(height: 8),
+      _buildAdvancedSearchInput(context),
+    ].toColumn(crossAxisAlignment: CrossAxisAlignment.stretch);
+  }
+
+  Widget _buildOptionDropdown(
+    BuildContext context, {
+    required String label,
+    required String value,
+    required List<_SearchOption> options,
+    int selectedMaxLines = 2,
+    required ValueChanged<String> onChanged,
+  }) {
+    final selected = options.firstWhere(
+      (option) => option.value == value,
+      orElse: () => options.first,
+    );
+    return _OptionPickerField(
+      label: label,
+      value: selected.label,
+      maxLines: selectedMaxLines,
+      onTap: () async {
+        final selectedValue = await showModalBottomSheet<String>(
+          context: context,
+          showDragHandle: true,
+          builder: (context) => _OptionPickerSheet(
+            title: label,
+            selectedValue: value,
+            options: options,
+          ),
+        );
+        if (selectedValue != null) {
+          onChanged(selectedValue);
+        }
+      },
+    );
+  }
+
+  InputDecoration _inputDecoration(
+    BuildContext context,
+    String label, {
+    IconData? prefixIcon,
+  }) => InputDecoration(
+    labelText: label,
+    isDense: true,
+    prefixIcon: prefixIcon == null
+        ? null
+        : Icon(prefixIcon, color: Theme.of(context).colorScheme.primary),
+    border: OutlineInputBorder(borderRadius: BorderRadius.circular(10)),
+    contentPadding: const EdgeInsets.symmetric(horizontal: 12, vertical: 8),
+  );
+}
+
+class _SearchBlock extends StatelessWidget {
+  final Widget header;
+  final Widget child;
+  final bool collapsed;
+
+  const _SearchBlock({
+    required this.header,
+    required this.child,
+    this.collapsed = false,
+  });
+
+  @override
+  Widget build(BuildContext context) {
+    return [
+          header,
+          if (!collapsed) ...[const SizedBox(height: 8), child],
+        ]
+        .toColumn(crossAxisAlignment: CrossAxisAlignment.stretch)
+        .padding(horizontal: 10, vertical: 8)
+        .card(elevation: 0);
+  }
+}
+
+class _OptionPickerField extends StatelessWidget {
+  final String label;
+  final String value;
+  final int maxLines;
+  final VoidCallback onTap;
+
+  const _OptionPickerField({
+    required this.label,
+    required this.value,
+    this.maxLines = 2,
+    required this.onTap,
+  });
+
+  @override
+  Widget build(BuildContext context) {
+    return InkWell(
+      borderRadius: BorderRadius.circular(10),
+      onTap: onTap,
+      child: InputDecorator(
+        decoration: InputDecoration(
+          labelText: label,
+          isDense: true,
+          border: OutlineInputBorder(borderRadius: BorderRadius.circular(10)),
+          contentPadding: const EdgeInsets.symmetric(
+            horizontal: 12,
+            vertical: 8,
+          ),
+          suffixIcon: const Icon(Icons.arrow_drop_down),
+        ),
+        child: Text(
+          value,
+          maxLines: maxLines,
+          overflow: TextOverflow.fade,
+          softWrap: maxLines > 1,
+        ),
+      ),
+    );
+  }
+}
+
+class _OptionPickerSheet extends StatelessWidget {
+  final String title;
+  final String selectedValue;
+  final List<_SearchOption> options;
+
+  const _OptionPickerSheet({
+    required this.title,
+    required this.selectedValue,
+    required this.options,
+  });
+
+  @override
+  Widget build(BuildContext context) {
+    return SafeArea(
+      child: SizedBox(
+        height: 420,
+        child: Column(
+          crossAxisAlignment: CrossAxisAlignment.stretch,
+          children: [
+            Padding(
+              padding: const EdgeInsets.fromLTRB(20, 4, 20, 8),
+              child: Text(
+                title,
+                style: Theme.of(context).textTheme.titleMedium,
+              ),
+            ),
+            Expanded(
+              child: ListView.builder(
+                itemCount: options.length,
+                itemBuilder: (context, index) {
+                  final option = options[index];
+                  final selected = option.value == selectedValue;
+                  return ListTile(
+                    dense: true,
+                    title: Text(option.label, softWrap: true),
+                    trailing: selected ? const Icon(Icons.check) : null,
+                    onTap: () => Navigator.of(context).pop(option.value),
+                  );
+                },
+              ),
+            ),
+          ],
+        ),
+      ),
+    );
+  }
+}
+
+class _SearchFields extends StatelessWidget {
+  final double maxWidth;
+  final int? columnCount;
+  final List<Widget> children;
+
+  const _SearchFields({
+    required this.maxWidth,
+    this.columnCount,
+    required this.children,
+  });
+
+  @override
+  Widget build(BuildContext context) {
+    final columns =
+        columnCount ??
+        (maxWidth >= 760
+            ? 3
+            : maxWidth >= 520
+            ? 2
+            : 1);
+    final fieldWidth = (maxWidth - 8 * (columns - 1)) / columns;
+    return Wrap(
+      spacing: 8,
+      runSpacing: 6,
+      crossAxisAlignment: WrapCrossAlignment.center,
+      children: children
+          .map((child) => SizedBox(width: fieldWidth, child: child))
+          .toList(),
     );
   }
 }
diff --git a/lib/page/setting/setting.dart b/lib/page/setting/setting.dart
index 747c203c..bd48aa19 100644
--- a/lib/page/setting/setting.dart
+++ b/lib/page/setting/setting.dart
@@ -9,6 +9,7 @@ import 'dart:io';
 
 import 'package:file_picker/file_picker.dart';
 import 'package:flutter/material.dart';
+import 'package:flutter/services.dart';
 import 'package:flutter_i18n/flutter_i18n.dart';
 import 'package:get_it/get_it.dart';
 import 'package:signals/signals_flutter.dart';
@@ -62,6 +63,8 @@ class SettingWindow extends StatefulWidget {
   State<SettingWindow> createState() => _SettingWindowState();
 }
 
+const int _defaultLowElectricityWarningThreshold = 20;
+
 class _SettingWindowState extends State<SettingWindow> {
   Widget _buildListSubtitle(String text) => Text(
     text,
@@ -87,6 +90,81 @@ class _SettingWindowState extends State<SettingWindow> {
     }
   }
 
+  bool get _lowElectricityWarningEnabled =>
+      !preference.contains(
+        preference.Preference.lowElectricityWarningEnabled,
+      ) ||
+      preference.getBool(preference.Preference.lowElectricityWarningEnabled);
+
+  int get _lowElectricityWarningThreshold {
+    final value =
+        preference.contains(
+          preference.Preference.lowElectricityWarningThreshold,
+        )
+        ? preference.getInt(
+            preference.Preference.lowElectricityWarningThreshold,
+          )
+        : _defaultLowElectricityWarningThreshold;
+    return value > 0 ? value : _defaultLowElectricityWarningThreshold;
+  }
+
+  Future<void> _showLowElectricityThresholdDialog() async {
+    var inputText = _lowElectricityWarningThreshold.toString();
+
+    final value = await showDialog<int>(
+      context: context,
+      builder: (context) => AlertDialog(
+        title: Text(
+          FlutterI18n.translate(
+            context,
+            "setting.low_electricity_threshold_dialog.title",
+          ),
+        ),
+        content: TextFormField(
+          autofocus: true,
+          initialValue: inputText,
+          keyboardType: TextInputType.number,
+          inputFormatters: [FilteringTextInputFormatter.digitsOnly],
+          maxLines: 1,
+          onChanged: (value) => inputText = value,
+          decoration: InputDecoration(
+            hintText: FlutterI18n.translate(
+              context,
+              "setting.low_electricity_threshold_dialog.input_hint",
+            ),
+          ),
+        ),
+        actions: [
+          TextButton(
+            onPressed: () => Navigator.pop(context),
+            child: Text(FlutterI18n.translate(context, "cancel")),
+          ),
+          TextButton(
+            onPressed: () {
+              final parsed = int.tryParse(inputText);
+              Navigator.pop(
+                context,
+                parsed == null || parsed <= 0
+                    ? _defaultLowElectricityWarningThreshold
+                    : parsed,
+              );
+            },
+            child: Text(FlutterI18n.translate(context, "confirm")),
+          ),
+        ],
+      ),
+    );
+
+    if (value == null) return;
+    await preference.setInt(
+      preference.Preference.lowElectricityWarningThreshold,
+      value,
+    );
+    if (mounted) {
+      setState(() {});
+    }
+  }
+
   @override
   Widget build(BuildContext context) {
     List<String> demoBlueModeName = [
@@ -343,6 +421,56 @@ class _SettingWindowState extends State<SettingWindow> {
                   ),
                 ),
                 const Divider(),
+                ListTile(
+                  title: Text(
+                    FlutterI18n.translate(
+                      context,
+                      "setting.low_electricity_warning",
+                    ),
+                  ),
+                  subtitle: Text(
+                    FlutterI18n.translate(
+                      context,
+                      "setting.low_electricity_warning_description",
+                    ),
+                  ),
+                  trailing: Switch(
+                    value: _lowElectricityWarningEnabled,
+                    onChanged: (bool value) async {
+                      await preference.setBool(
+                        preference.Preference.lowElectricityWarningEnabled,
+                        value,
+                      );
+                      if (mounted) {
+                        setState(() {});
+                      }
+                    },
+                  ),
+                ),
+                const Divider(),
+                ListTile(
+                  enabled: _lowElectricityWarningEnabled,
+                  title: Text(
+                    FlutterI18n.translate(
+                      context,
+                      "setting.low_electricity_threshold",
+                    ),
+                  ),
+                  subtitle: Text(
+                    FlutterI18n.translate(
+                      context,
+                      "setting.low_electricity_threshold_description",
+                      translationParams: {
+                        "threshold": _lowElectricityWarningThreshold.toString(),
+                      },
+                    ),
+                  ),
+                  trailing: const Icon(Icons.navigate_next),
+                  onTap: _lowElectricityWarningEnabled
+                      ? _showLowElectricityThresholdDialog
+                      : null,
+                ),
+                const Divider(),
                 ListTile(
                   title: Text(
                     FlutterI18n.translate(
diff --git a/lib/repository/preference.dart b/lib/repository/preference.dart
index ef61add1..3d86dad3 100644
--- a/lib/repository/preference.dart
+++ b/lib/repository/preference.dart
@@ -147,6 +147,14 @@ enum Preference {
     key: "classStyleCompletedInnerAlpha",
     type: "double",
   ), // 已完成课程底色透明度
+  lowElectricityWarningEnabled(
+    key: "lowElectricityWarningEnabled",
+    type: "bool",
+  ), // 首页低电量卡片变色提醒
+  lowElectricityWarningThreshold(
+    key: "lowElectricityWarningThreshold",
+    type: "int",
+  ), // 首页低电量卡片变色提醒阈值
   homepageInfoOrder(
     key: "homepageInfoOrder",
     type: "String",
diff --git a/lib/repository/xidian_ids/library_session.dart b/lib/repository/xidian_ids/library_session.dart
index 3eee20bb..9de4926a 100644
--- a/lib/repository/xidian_ids/library_session.dart
+++ b/lib/repository/xidian_ids/library_session.dart
@@ -12,114 +12,496 @@ import 'package:watermeter/repository/xidian_ids/slider_captcha_client.dart';
 import 'package:watermeter/repository/logger.dart';
 import 'package:watermeter/model/xidian_ids/library.dart';
 import 'package:watermeter/repository/xidian_ids/ids_session.dart';
-import 'package:watermeter/repository/preference.dart' as preference;
+
+List<LibrarySearchOption> _yearOptions() {
+  final currentYear = DateTime.now().year;
+  return [
+    const LibrarySearchOption("", "全部"),
+    for (int year = currentYear; year >= 1950; year--)
+      LibrarySearchOption(year.toString(), year.toString()),
+  ];
+}
+
+class LibrarySearchOption {
+  final String value;
+  final String label;
+  final String shortLabel;
+
+  const LibrarySearchOption(this.value, this.label, [String? shortLabel])
+    : shortLabel = shortLabel ?? label;
+}
+
+class LibrarySearchFilterOptions {
+  final List<LibrarySearchOption> searchFields;
+  final List<LibrarySearchOption> documentTypes;
+  final List<LibrarySearchOption> resourceTypes;
+  final List<LibrarySearchOption> campuses;
+  final List<LibrarySearchOption> locations;
+  final List<LibrarySearchOption> countries;
+  final List<LibrarySearchOption> languages;
+  final List<LibrarySearchOption> years;
+
+  const LibrarySearchFilterOptions({
+    required this.searchFields,
+    required this.documentTypes,
+    required this.resourceTypes,
+    required this.campuses,
+    required this.locations,
+    required this.countries,
+    required this.languages,
+    required this.years,
+  });
+
+  factory LibrarySearchFilterOptions.fallback() => LibrarySearchFilterOptions(
+    searchFields: const [
+      LibrarySearchOption("keyWord", "任意词", "任意"),
+      LibrarySearchOption("title", "题名"),
+      LibrarySearchOption("author", "责任者"),
+      LibrarySearchOption("isbn", "标准号", "标准号"),
+      LibrarySearchOption("callNo", "索书号", "索书"),
+      LibrarySearchOption("barcode", "条码号", "条码"),
+    ],
+    documentTypes: const [
+      LibrarySearchOption("", "全部"),
+      LibrarySearchOption("1", "图书"),
+    ],
+    resourceTypes: const [
+      LibrarySearchOption("", "全部"),
+      LibrarySearchOption("1", "馆藏资源"),
+      LibrarySearchOption("2", "电子资源"),
+    ],
+    campuses: const [
+      LibrarySearchOption("", "全部"),
+      LibrarySearchOption("1", "雁塔校区"),
+      LibrarySearchOption("2", "长安校区"),
+    ],
+    locations: const [LibrarySearchOption("", "全部")],
+    countries: const [
+      LibrarySearchOption("", "全部"),
+      LibrarySearchOption("CN", "中国"),
+      LibrarySearchOption("US", "美国"),
+    ],
+    languages: const [
+      LibrarySearchOption("", "全部"),
+      LibrarySearchOption("chi", "汉语"),
+      LibrarySearchOption("eng", "英语"),
+    ],
+    years: _yearOptions(),
+  );
+}
 
 class LibrarySession extends IDSSession {
-  // static String token = "";
-  // static String groupCode = "";
+  static const String _opacBaseUrl = "https://mfindxidian.libsp.cn";
+  static const String _opacJwtHeader = "jwtOpacAuth";
+  static const String _defaultGroupCode = "200755";
+  static const String _opacLoginTarget =
+      "https://tyrzfw.chaoxing.com/auth/xidian/cas/init?"
+      "isLogout=0&refer=https%3A%2F%2Fmfindxidian.libsp.cn"
+      "%2Ffind%2Fsso%2Flogin%2Fxidian%2F1";
+
   static int userId = 0;
   static String token = "";
+  static String groupCode = "";
 
-  /* Note 1: Search book pattern, no need to implement.
-      POST https://zs.xianmaigu.com/xidian_book/api/search/getSearchBookType.html
-      body { "libraryId": 5 }
-    
-    Note 2: 
+  /*
+    Note 1:
       Scan to borrow book and transfer borrow book will not supported, 
       since I am not an official app, these function may lead me trouble:-P
 
       All I want to tell you, is the loanBook.html and borrow.html, that's it.
       And why Wechat's library app allows to scan the picture?
 
-    Note 3: 
+    Note 2:
       Search the book's info does not require login.
       You can use it in SPM class...
   */
 
-  // Options get header => Options(
-  //   headers: {
-  //     HttpHeaders.cookieHeader: "jwt=$token; jwtHeader=jwtOpacAuth",
-  //     "groupCode": groupCode.isEmpty ? "undefined" : groupCode,
-  //     "jwtOpacAuth": token,
-  //     HttpHeaders.refererHeader: "https://findxidian.libsp.cn/",
-  //     HttpHeaders.hostHeader: "findxidian.libsp.cn",
-  //   },
-  // )..contentType = "application/json;charset=utf-8";
+  Options get _opacOptions => Options(
+    contentType: "application/json;charset=utf-8",
+    headers: {
+      HttpHeaders.cookieHeader: "jwt=$token; jwtHeader=$_opacJwtHeader",
+      HttpHeaders.refererHeader: "$_opacBaseUrl/",
+      HttpHeaders.hostHeader: "mfindxidian.libsp.cn",
+      "groupCode": groupCode.isEmpty ? _defaultGroupCode : groupCode,
+      "mappingPath": "",
+      _opacJwtHeader: token,
+    },
+  );
+
+  Future<LibrarySearchFilterOptions> searchFilterOptions() async {
+    final fallback = LibrarySearchFilterOptions.fallback();
+    try {
+      final results = await Future.wait([
+        _searchFieldOptions(),
+        _conditionOptions(),
+        _locationOptions(),
+      ]);
+      final conditions =
+          results[1]
+              as ({
+                List<LibrarySearchOption> documentTypes,
+                List<LibrarySearchOption> countries,
+                List<LibrarySearchOption> languages,
+              });
+      return LibrarySearchFilterOptions(
+        searchFields: results[0] as List<LibrarySearchOption>,
+        documentTypes: conditions.documentTypes,
+        resourceTypes: fallback.resourceTypes,
+        campuses: fallback.campuses,
+        locations: results[2] as List<LibrarySearchOption>,
+        countries: conditions.countries,
+        languages: conditions.languages,
+        years: fallback.years,
+      );
+    } catch (e, s) {
+      log.handle(e, s, "[LibrarySession] Fetch search filter options failed");
+      return fallback;
+    }
+  }
+
+  Future<List<LibrarySearchOption>> _searchFieldOptions() async {
+    final response = await dioNoOfflineCheck.get(
+      "$_opacBaseUrl/find/groupResource/getFindOpacSearchFieldParaList",
+      options: _opacOptions,
+    );
+    final data = response.data["data"];
+    if (data is! List) {
+      return LibrarySearchFilterOptions.fallback().searchFields;
+    }
+
+    final options = <LibrarySearchOption>[
+      const LibrarySearchOption("keyWord", "任意词", "任意"),
+    ];
+    for (final item in data.whereType<Map>()) {
+      final label = item["searchField"]?.toString() ?? "";
+      final value = _searchFieldValue(label);
+      if (label.isNotEmpty && value.isNotEmpty) {
+        options.add(
+          LibrarySearchOption(value, label, _searchFieldShort(label)),
+        );
+      }
+    }
+    return options;
+  }
+
+  Future<
+    ({
+      List<LibrarySearchOption> documentTypes,
+      List<LibrarySearchOption> countries,
+      List<LibrarySearchOption> languages,
+    })
+  >
+  _conditionOptions() async {
+    final response = await dioNoOfflineCheck.get(
+      "$_opacBaseUrl/find/category/getConditionList",
+      options: _opacOptions,
+    );
+    final data = response.data["data"];
+    if (data is! Map) {
+      final fallback = LibrarySearchFilterOptions.fallback();
+      return (
+        documentTypes: fallback.documentTypes,
+        countries: fallback.countries,
+        languages: fallback.languages,
+      );
+    }
+
+    return (
+      documentTypes: _codedOptions(data["documentTypeList"]),
+      countries: _codedOptions(data["countryList"]),
+      languages: _codedOptions(data["languageList"]),
+    );
+  }
+
+  Future<List<LibrarySearchOption>> _locationOptions() async {
+    final response = await dioNoOfflineCheck.post(
+      "$_opacBaseUrl/find/location/list",
+      data: {
+        "locationName": "",
+        "campusIds": [],
+        "locationTypeCodes": [],
+        "entrust": 0,
+        "subscribe": 0,
+        "page": 1,
+        "rows": 2000,
+      },
+      options: _opacOptions,
+    );
+    final data = response.data["data"];
+    final rawList = data is Map ? data["donateList"] : null;
+    if (rawList is! List) {
+      return LibrarySearchFilterOptions.fallback().locations;
+    }
+
+    final options = <LibrarySearchOption>[const LibrarySearchOption("", "全部")];
+    for (final item in rawList.whereType<Map>()) {
+      final id = item["locationId"]?.toString() ?? "";
+      final name = item["locationName"]?.toString() ?? "";
+      if (id.isNotEmpty && name.isNotEmpty) {
+        options.add(LibrarySearchOption(id, name));
+      }
+    }
+    return options;
+  }
+
+  List<LibrarySearchOption> _codedOptions(Object? value) {
+    final options = <LibrarySearchOption>[const LibrarySearchOption("", "全部")];
+    if (value is! List) return options;
+    for (final item in value.whereType<Map>()) {
+      final code = item["code"]?.toString() ?? "";
+      final name = item["name"]?.toString() ?? "";
+      if (code.isNotEmpty && name.isNotEmpty) {
+        options.add(LibrarySearchOption(code, name));
+      }
+    }
+    return options;
+  }
+
+  String _searchFieldValue(String label) =>
+      const {
+        "题名": "title",
+        "责任者": "author",
+        "主题": "subject",
+        "标准号": "isbn",
+        "分类号": "kindNo",
+        "索书号": "callNo",
+        "出版社": "publisher",
+        "摘要": "abstract",
+        "条码号": "barcode",
+        "工具号": "toolNumber",
+      }[label] ??
+      "";
+
+  String _searchFieldShort(String label) =>
+      const {
+        "任意词": "任意",
+        "责任者": "责任者",
+        "标准号": "标准号",
+        "分类号": "分类",
+        "索书号": "索书",
+        "条码号": "条码",
+        "工具号": "工具",
+      }[label] ??
+      label;
 
   Future<List<BookInfo>> searchBook(
     String searchWord,
     int page, {
-    String searchField = "title",
+    String searchField = "keyWord",
   }) async {
     if (searchWord.isEmpty) return [];
-    var rawData = await dio
-        .post(
-          "https://shuwo.xidian.edu.cn/xidian_book/api/search/list.html",
-          data: {
-            "libraryId": 5,
-            "searchWord": searchWord,
-            "searchFiled": searchField,
-            "page": page,
-            "searchLocationStatus": 1,
+    final rawData = await _fetchOpacSearchResult(
+      "$_opacBaseUrl/find/unify/search",
+      _opacSearchBody(
+        searchWord: searchWord,
+        searchField: searchField,
+        page: page,
+      )..addAll({"searchItems": null, "indexSearch": 1}),
+    );
+    return _buildBookInfoList(rawData);
+  }
+
+  Future<List<BookInfo>> advancedSearchBook(
+    String searchWord,
+    int page, {
+    String searchField = "keyWord",
+    String matchMode = "2",
+    String? docCode,
+    String? resourceType,
+    int? campusId,
+    int? locationId,
+    String? countryCode,
+    String? langCode,
+    bool? onlyOnShelf,
+    String? publishBegin,
+    String? publishEnd,
+  }) async {
+    final rawData = await _fetchOpacSearchResult(
+      "$_opacBaseUrl/find/unify/advancedSearch",
+      _opacSearchBody(
+        searchWord: "",
+        searchField: searchField,
+        matchMode: matchMode,
+        page: page,
+        docCode: docCode,
+        resourceType: resourceType,
+        campusId: campusId,
+        locationId: locationId,
+        countryCode: countryCode,
+        langCode: langCode,
+        onlyOnShelf: onlyOnShelf,
+        publishBegin: _emptyToNull(publishBegin),
+        publishEnd: _emptyToNull(publishEnd),
+      )..addAll({
+        "searchItems": [
+          {
+            "oper": null,
+            "searchField": searchField,
+            "matchMode": matchMode,
+            "searchFieldContent": searchWord,
           },
-        )
-        .then((value) {
-          if (value.data["data"] != null &&
-              value.data["data"]["list"] != null) {
-            return value.data["data"]["list"];
-          } else {
-            return [];
-          }
-        });
+        ],
+        "searchFieldList": null,
+      }),
+    );
+    return _buildBookInfoList(rawData);
+  }
 
-    List<BookInfo> toReturn = [];
-    final pool = Pool(5);
+  Future<String> bookCover(String title, String isbn, int docNumber) =>
+      dioNoOfflineCheck
+          .post(
+            "$_opacBaseUrl/find/unify/getPItemAndOnShelfCountAndDuxiuImageUrl",
+            data: {"title": title, "isbn": isbn, "recordId": docNumber},
+            options: _opacOptions,
+          )
+          .then((value) {
+            final data = value.data["data"];
+            if (data is! Map) return "";
+            return data["duxiuImageUrl"]?.toString() ?? "";
+          });
 
-    await Future.wait([
-      ...List<BookInfo>.generate(
-        rawData.length,
-        (index) => BookInfo.fromJson(rawData[index]),
-      ).map(
-        (e) => pool.withResource(() async {
-          e.imageUrl = await bookCover(e.bookName, e.isbn ?? "", e.docNumber);
-          toReturn.add(e);
-        }),
-      ),
-    ]);
+  Future<List<BookLocation>> bookLocations(int recordId) async {
+    if (recordId <= 0) return [];
 
-    return toReturn;
+    final response = await dioNoOfflineCheck.post(
+      "$_opacBaseUrl/find/physical/groupitems",
+      data: {
+        "page": 1,
+        "rows": 200,
+        "entrance": null,
+        "recordId": recordId.toString(),
+        "isUnify": true,
+      },
+      options: _opacOptions,
+    );
+
+    final data = response.data["data"];
+    final rawList = data is Map ? data["list"] : null;
+    if (rawList is! List) return [];
+
+    return rawList
+        .whereType<Map>()
+        .map((e) => BookLocation.fromOpacJson(Map<String, dynamic>.from(e)))
+        .toList();
   }
 
-  Future<String> bookCover(String title, String isbn, int docNumber) => dio
-      .post(
-        "https://findxidian.libsp.cn/find/unify/getPItemAndOnShelfCountAndDuxiuImageUrl",
-        data: {"title": title, "isbn": isbn, "recordId": docNumber},
-        options: Options(
-          headers: {
-            HttpHeaders.contentTypeHeader: "application/json",
-            HttpHeaders.refererHeader: "https://findxidian.libsp.cn/",
-            "groupCode": "200755",
-          },
-        ),
-      )
-      .then((value) => value.data["data"]["duxiuImageUrl"]?.toString() ?? "");
+  Map<String, dynamic> _opacSearchBody({
+    required String searchWord,
+    required String searchField,
+    String matchMode = "2",
+    required int page,
+    String? docCode,
+    String? resourceType,
+    int? campusId,
+    int? locationId,
+    String? countryCode,
+    String? langCode,
+    bool? onlyOnShelf,
+    String? publishBegin,
+    String? publishEnd,
+  }) => {
+    "docCode": [docCode],
+    "litCode": [],
+    "searchFieldContent": searchWord,
+    "searchField": searchField,
+    "matchMode": matchMode,
+    "resourceType": _stringArray(resourceType),
+    "subject": [],
+    "discode1": [],
+    "publisher": [],
+    "locationId": _intArray(locationId),
+    "collectionName": [],
+    "author": [],
+    "langCode": _stringArray(langCode),
+    "countryCode": _stringArray(countryCode),
+    "publishBegin": publishBegin,
+    "publishEnd": publishEnd,
+    "coreInclude": [],
+    "ddType": [],
+    "verifyStatus": [],
+    "group": [],
+    "sortField": "relevance",
+    "sortClause": "desc",
+    "page": page,
+    "rows": 10,
+    "onlyOnShelf": onlyOnShelf,
+    "campusId": _intArray(campusId),
+    "curLocationId": [],
+    "eCollectionIds": [],
+    "kindNo": [],
+    "libCode": [],
+    "neweCollectionIds": [],
+    "newCoreInclude": [],
+    "customSub": [],
+    "customSub0": [],
+  };
 
-  Future<String> renew(BorrowData toUse) => dio
-      .post(
-        "https://shuwo.xidian.edu.cn/xidian_book/api/borrow/renewBook.html",
+  Future<List<Map<String, dynamic>>> _fetchOpacSearchResult(
+    String url,
+    Map<String, dynamic> body,
+  ) => dioNoOfflineCheck.post(url, data: body, options: _opacOptions).then((
+    value,
+  ) {
+    final data = value.data["data"];
+    final searchResult = data is Map ? data["searchResult"] : null;
+    if (searchResult is! List) {
+      return <Map<String, dynamic>>[];
+    }
+    return searchResult
+        .whereType<Map>()
+        .map((e) => Map<String, dynamic>.from(e))
+        .toList();
+  });
+
+  List<BookInfo> _buildBookInfoList(List<Map<String, dynamic>> rawData) =>
+      rawData.map(BookInfo.fromOpacJson).toList();
+
+  String? _emptyToNull(String? value) {
+    if (value == null || value.trim().isEmpty) return null;
+    return value.trim();
+  }
+
+  List<String> _stringArray(String? value) =>
+      value == null || value.isEmpty ? [] : [value];
+
+  List<int> _intArray(int? value) => value == null ? [] : [value];
+
+  Future<String> renew(BorrowData toUse) async {
+    try {
+      if (token.isEmpty) {
+        await initSession();
+      }
+
+      final response = await dioNoOfflineCheck.post(
+        "$_opacBaseUrl/find/lendbook/reNew",
         data: {
-          "libraryId": 5,
-          "userId": userId,
-          "token": token,
-          "cardNumber": preference.getString(preference.Preference.idsAccount),
-          "barNumber": toUse.barcode,
+          "loanIds": [toUse.loanId],
         },
-      )
-      .then((value) => value.data["msg"]?.toString() ?? "接口返回错误")
-      .onError<Object>((e, s) {
-        log.handle(e, s);
-        return "获取过程遇到错误";
-      });
+        options: _opacOptions,
+      );
+      final body = response.data;
+      final data = body["data"];
+      final result = data is Map ? data["result"] : null;
+      final success = data is Map ? data["success"] : null;
+
+      if (success is num && success > 0) {
+        final newDate = result is Map && result.values.isNotEmpty
+            ? result.values.first.toString()
+            : "";
+        return newDate.isEmpty ? "续借成功" : "续借成功，新还书日期：$newDate";
+      }
+
+      if (result is Map && result.values.isNotEmpty) {
+        return result.values.join("\n");
+      }
+      return body["message"]?.toString().isNotEmpty == true
+          ? body["message"].toString()
+          : "续借失败";
+    } catch (e, s) {
+      log.handle(e, s);
+      return "获取过程遇到错误";
+    }
+  }
 
   Future<List<BorrowData>> getBorrowList() async {
     log.info(
@@ -127,43 +509,50 @@ class LibrarySession extends IDSSession {
       "Getting borrow list",
     );
 
-    if (userId == 0 && token == "") {
+    if (token.isEmpty) {
       await initSession();
     }
 
-    var rawData = await dio
+    final List<Map<String, dynamic>> rawData = await dioNoOfflineCheck
         .post(
-          "https://shuwo.xidian.edu.cn/xidian_book/api/borrow/getBorrowList.html",
+          "$_opacBaseUrl/find/loanInfo/loanList",
           data: {
-            "libraryId": 5,
-            "userId": userId,
-            "token": token,
-            "cardNumber": preference.getString(
-              preference.Preference.idsAccount,
-            ),
-            "page": 0,
+            "page": 1,
+            "rows": 999,
+            "searchType": 1,
+            "searchContent": "",
+            "sortType": 0,
+            "startDate": null,
+            "endDate": null,
           },
+          options: _opacOptions,
         )
-        .then((value) => value.data["data"]);
+        .then((value) {
+          final data = value.data["data"];
+          if (data is! Map || data["searchResult"] == null) {
+            throw NotFetchLibraryException(
+              message: "Unexpected borrow list response: ${value.data}",
+            );
+          }
+          final searchResult = data["searchResult"];
+          if (searchResult is! List) {
+            throw NotFetchLibraryException(
+              message: "Unexpected borrow list payload: ${value.data}",
+            );
+          }
+          return searchResult.cast<Map<String, dynamic>>();
+        });
 
     List<BorrowData> toAppend = [];
     final pool = Pool(5);
     await Future.wait([
-      ...List<BorrowData>.generate(
-        rawData.length,
-        (index) => BorrowData.fromJson(rawData[index]),
-      ).map(
-        (e) => pool.withResource(() async {
-          e.imageUrl = await searchBook(e.barcode, 1, searchField: "barcode")
-              .then(
-                (books) => books.isNotEmpty
-                    ? LibrarySession().bookCover(
-                        books.first.bookName,
-                        books.first.isbn ?? "",
-                        books.first.docNumber,
-                      )
-                    : Future.value(""),
-              );
+      ...rawData.map(
+        (rawItem) => pool.withResource(() async {
+          final e = BorrowData.fromOpacJson(rawItem);
+          final recordId = _intValue(rawItem["recordId"]);
+          e.imageUrl = recordId > 0
+              ? await bookCover(e.title, e.isbn, recordId)
+              : "";
           toAppend.add(e);
         }),
       ),
@@ -178,214 +567,185 @@ class LibrarySession extends IDSSession {
     return toAppend;
   }
 
+  int _intValue(Object? value) {
+    if (value is int) return value;
+    if (value is num) return value.toInt();
+    if (value is String) return int.tryParse(value) ?? 0;
+    return 0;
+  }
+
   @override
   Future<void> initSession() async {
     log.info("[LibrarySession][initSession] Initalizing Library Session");
     try {
-      String? location = await checkAndLogin(
-        target:
-            "https://hyytsgxzs.xidian.edu.cn/api/index/casLoginDo.html?"
-            "libraryId=5&openId=o2b1a5Fg6r8hKcL0FXopEkfmiQGc&source=xdbb",
+      token = "";
+      groupCode = "";
+      userId = 0;
+
+      final location = await checkAndLogin(
+        target: _opacLoginTarget,
         sliderCaptcha: (String cookieStr) =>
             SliderCaptchaClientProvider(cookie: cookieStr).solve(),
       );
 
-      RegExp matchJson = RegExp(r'wx.miniProgram.postMessage(.*);');
-      String result = "";
-
-      while (location != null) {
-        var response = await dio.get(location);
-        log.info("[LibrarySession][initSession] Received location: $location.");
-        location = response.headers[HttpHeaders.locationHeader]?[0];
-
-        if (location == null) {
-          result =
-              matchJson
-                  .firstMatch(response.data.toString())?[0]!
-                  .replaceFirst("wx.miniProgram.postMessage(", "")
-                  .replaceFirst("data", "\"data\"")
-                  .replaceFirst(");", "") ??
-              "";
-        }
+      await _resolveOpacLogin(location);
+      if (token.isEmpty) {
+        throw NotFetchLibraryException(message: "Can not find OPAC JWT.");
       }
 
-      log.info("[LibrarySession][initSession] result is $result");
-      var toGet = jsonDecode(result);
-
-      userId = toGet["data"]["id"];
-      token = toGet["data"]["token"];
+      _loadJwtInfo(token);
+      await _warmUpOpacSession();
     } catch (e, s) {
       log.handle(e, s);
       throw NotFetchLibraryException(message: e.toString());
     }
   }
 
-  //Future<String> renew(int loanId) async {
-  //  return await dio
-  //      .post(
-  //        "https://findxidian.libsp.cn/find/lendbook/reNew",
-  //        data: {
-  //          "loanIds": [loanId],
-  //        },
-  //        options: header,
-  //      )
-  //      .then((value) => value.data["data"]["result"]?.toString() ?? "遇到错误");
-  //}
-  //
-  //Future<void> getBorrowList() async {
-  //  if (state.value == SessionState.fetching) {
-  //    return;
-  //  }
-  //  log.info(
-  //    "[LibrarySession][getBorrowList] "
-  //    "Getting borrow list",
-  //  );
-  //
-  //  try {
-  //    state.value = SessionState.fetching;
-  //    if (token.isEmpty) {
-  //      await initSession();
-  //    }
-  //
-  //    if (groupCode.isEmpty) {
-  //      groupCode = await dio
-  //          .post(
-  //            "https://findxidian.libsp.cn/find/homePage/getGroupCode",
-  //            data: {"mappingPath": ""},
-  //            options: header,
-  //          )
-  //          .then((value) => value.data["data"]["groupCode"]);
-  //    }
-  //
-  //    var rawData = await dio
-  //        .post(
-  //          "https://findxidian.libsp.cn/find/loanInfo/loanList",
-  //          data: {
-  //            "page": 1,
-  //            "rows": 999,
-  //            "searchType": 1,
-  //            "searchContent": "",
-  //            "sortType": 0,
-  //            "startDate": null,
-  //            "endDate": null,
-  //          },
-  //          options: header,
-  //        )
-  //        .then((value) => value.data["data"]["searchResult"]);
-  //    borrowList.clear();
-  //    borrowList.addAll(
-  //      List<BorrowData>.generate(
-  //        rawData.length,
-  //        (index) => BorrowData.fromJson(rawData[index]),
-  //      ),
-  //    );
-  //    state.value = SessionState.fetched;
-  //  } catch (e) {
-  //    error.value = e.toString();
-  //    state.value = SessionState.error;
-  //  }
-  //}
-  //
-  //@override
-  //Future<void> initSession() async {
-  //  log.info(
-  //    "[LibrarySession][initSession] "
-  //    "Initalizing Library Session",
-  //  );
-  //
-  //  token = "";
-  //
-  //  try {
-  //    String destinationURL =
-  //        "https://findxidian.libsp.cn/find/sso/login/xidian/0";
-  //    String location = await checkAndLogin(
-  //      target: "https://tyrzfw.chaoxing.com/auth/xidian/cas/index",
-  //      sliderCaptcha: (String cookieStr) =>
-  //          SliderCaptchaClientProvider(cookie: cookieStr).solve(),
-  //    );
-  //    var response = await dio.get(location);
-  //
-  //    while (response.headers[HttpHeaders.locationHeader] != null) {
-  //      location = response.headers[HttpHeaders.locationHeader]![0];
-  //      log.info(
-  //        "[LibrarySession][initSession] "
-  //        "Received location: $location.",
-  //      );
-  //      response = await dio.get(location);
-  //    }
-  //
-  //    // God damn, it use js to redirect...
-  //    String toDeal = response.data.toString();
-  //    String data = RegExp(
-  //      r'data: "(?<data>.*)",',
-  //    ).firstMatch(toDeal)!.namedGroup("data")!;
-  //    int time = int.parse(
-  //      RegExp(
-  //        r'time: (?<time>[0-9]*),',
-  //      ).firstMatch(toDeal)!.namedGroup("time")!,
-  //    );
-  //    String enc = RegExp(
-  //      r'enc: "(?<enc>.*)",',
-  //    ).firstMatch(toDeal)!.namedGroup("enc")!;
-  //    String name = RegExp(
-  //      r'displayName: "(?<name>.*)",',
-  //    ).firstMatch(toDeal)!.namedGroup("name")!;
-  //    int userRole = int.parse(
-  //      RegExp(
-  //        r'userRole: (?<userRole>[0-9]{1}),',
-  //      ).firstMatch(toDeal)!.namedGroup("userRole")!,
-  //    );
-  //
-  //    var isSuccess = await dio
-  //        .get(
-  //          "https://tyrzfw.chaoxing.com/auth/xidian/cas/login",
-  //          queryParameters: {
-  //            "data": data,
-  //            "time": time,
-  //            "enc": enc,
-  //            "displayName": name,
-  //            "userRole": userRole,
-  //            "group1": null,
-  //            "mobilePhone": null,
-  //          },
-  //        )
-  //        .then((value) => jsonDecode(value.data));
-  //
-  //    if (!isSuccess["status"]) {
-  //      throw NotFetchLibraryException(
-  //        message: "Login failed: ${isSuccess["status"]}",
-  //      );
-  //    }
-  //
-  //    response = await dio.get(
-  //      destinationURL,
-  //      queryParameters: {"data": data, "time": time, "enc": enc},
-  //    );
-  //
-  //    RegExp tokenExp = RegExp(r"jwt=(?<jwt>.*)&");
-  //
-  //    while (response.headers[HttpHeaders.locationHeader] != null) {
-  //      location = response.headers[HttpHeaders.locationHeader]![0];
-  //      token = tokenExp.firstMatch(location)?.namedGroup("jwt") ?? "";
-  //
-  //      log.info(
-  //        "[LibrarySession][initSession] "
-  //        "Received location: $location.",
-  //      );
-  //      response = await dio.get(location, options: header);
-  //    }
-  //
-  //    if (token.isEmpty) {
-  //      throw NotFetchLibraryException();
-  //    }
-  //  } catch (e, s) {
-  //    log.handle(e, s);
-  //    if (e is NotFetchLibraryException) {
-  //      rethrow;
-  //    }
-  //    throw NotFetchLibraryException();
-  //  }
-  //}
+  Future<void> _resolveOpacLogin(String firstLocation) async {
+    String location = firstLocation;
+    for (int i = 0; i < 20; i++) {
+      _throwIfWechatLocation(location);
+      _tryLoadJwtFromLocation(location);
+      if (token.isNotEmpty) return;
+
+      final response = await dioNoOfflineCheck.get(location);
+      log.info("[LibrarySession][initSession] Received location: $location.");
+      final nextLocation = response.headers[HttpHeaders.locationHeader]?[0];
+      if (nextLocation != null) {
+        location = _resolveLocation(location, nextLocation);
+        _throwIfWechatLocation(location);
+        continue;
+      }
+
+      final next = await _tryChaoxingCasLogin(response.data.toString());
+      if (next == null) {
+        return;
+      }
+      location = next;
+    }
+  }
+
+  Future<String?> _tryChaoxingCasLogin(String html) async {
+    final data = RegExp(
+      r'data: "(?<data>.*)",',
+    ).firstMatch(html)?.namedGroup("data");
+    final time = RegExp(
+      r'time: (?<time>[0-9]*),',
+    ).firstMatch(html)?.namedGroup("time");
+    final enc = RegExp(
+      r'enc: "(?<enc>.*)",',
+    ).firstMatch(html)?.namedGroup("enc");
+    final name = RegExp(
+      r'displayName: "(?<name>.*)",',
+    ).firstMatch(html)?.namedGroup("name");
+    final userRole = RegExp(
+      r'userRole: (?<userRole>[0-9]{1}),',
+    ).firstMatch(html)?.namedGroup("userRole");
+
+    if ([data, time, enc, name, userRole].any((element) => element == null)) {
+      return null;
+    }
+
+    final isSuccess = await dioNoOfflineCheck
+        .get(
+          "https://tyrzfw.chaoxing.com/auth/xidian/cas/login",
+          queryParameters: {
+            "data": data,
+            "time": time,
+            "enc": enc,
+            "displayName": name,
+            "userRole": userRole,
+            "group1": null,
+            "mobilePhone": null,
+          },
+        )
+        .then((value) {
+          if (value.data is String) {
+            return jsonDecode(value.data);
+          }
+          return value.data;
+        });
+
+    if (isSuccess is! Map || isSuccess["status"] != true) {
+      throw NotFetchLibraryException(
+        message: "Chaoxing CAS login failed: $isSuccess",
+      );
+    }
+
+    final response = await dioNoOfflineCheck.get(
+      "$_opacBaseUrl/find/sso/login/xidian/1",
+      queryParameters: {"data": data, "time": time, "enc": enc},
+    );
+    return response.headers[HttpHeaders.locationHeader]?[0];
+  }
+
+  void _throwIfWechatLocation(String location) {
+    final uri = Uri.parse(location);
+    final host = uri.host.toLowerCase();
+    if (host == "open.weixin.qq.com" ||
+        host == "wx.chaoxing.com" ||
+        uri.path.toLowerCase().contains("/weixin/")) {
+      throw NotFetchLibraryException(
+        message: "Wechat auth redirect is not allowed: $location",
+      );
+    }
+  }
+
+  void _tryLoadJwtFromLocation(String location) {
+    final uri = Uri.parse(location);
+    token = uri.queryParameters["jwt"] ?? token;
+
+    final fragment = uri.fragment;
+    final queryIndex = fragment.indexOf("?");
+    if (token.isEmpty && queryIndex >= 0) {
+      token =
+          Uri.splitQueryString(fragment.substring(queryIndex + 1))["jwt"] ?? "";
+    }
+  }
+
+  void _loadJwtInfo(String jwt) {
+    final parts = jwt.split(".");
+    if (parts.length < 2) return;
+
+    final payload = jsonDecode(
+      utf8.decode(base64Url.decode(base64Url.normalize(parts[1]))),
+    );
+    if (payload is! Map<String, dynamic>) return;
+
+    userId = int.tryParse(payload["sub"]?.toString() ?? "") ?? 0;
+    groupCode = payload["groupCode"]?.toString() ?? _defaultGroupCode;
+  }
+
+  Future<void> _warmUpOpacSession() async {
+    try {
+      await dioNoOfflineCheck.get(
+        "$_opacBaseUrl/oga/userinfo",
+        queryParameters: {"jwtHeader": _opacJwtHeader, "jwt": token},
+        options: _opacOptions,
+      );
+    } catch (e, s) {
+      log.handle(e, s, "[LibrarySession] Warm up user info failed");
+    }
+
+    final fetchedGroupCode = await dioNoOfflineCheck
+        .post(
+          "$_opacBaseUrl/find/homePage/getGroupCode",
+          data: {"mappingPath": ""},
+          options: _opacOptions,
+        )
+        .then((value) => value.data["data"]?["groupCode"]?.toString())
+        .onError<Object>((e, s) {
+          log.handle(e, s, "[LibrarySession] Fetch group code failed");
+          return null;
+        });
+    groupCode = fetchedGroupCode ?? groupCode;
+  }
+
+  String _resolveLocation(String currentLocation, String location) {
+    final uri = Uri.parse(location);
+    if (uri.hasScheme) return location;
+    return Uri.parse(currentLocation).resolve(location).toString();
+  }
 }
 
 class NotFetchLibraryException implements Exception {