diff --git a/CustomKeyboard/Manager/KBEmojiDataProvider.h b/CustomKeyboard/Manager/KBEmojiDataProvider.h
index fdae80f..5082b0e 100644
--- a/CustomKeyboard/Manager/KBEmojiDataProvider.h
+++ b/CustomKeyboard/Manager/KBEmojiDataProvider.h
@@ -41,6 +41,9 @@ FOUNDATION_EXPORT NSString * const KBEmojiRecentsDidChangeNotification;
 /// 更新当前语言对应的分类标题。
 - (void)refreshLocalizedTitles;
 
+/// 释放大块缓存（emoji 分类与索引），下次访问会重新加载。
+- (void)purgeLargeCaches;
+
 @end
 
 NS_ASSUME_NONNULL_END
diff --git a/CustomKeyboard/Manager/KBEmojiDataProvider.m b/CustomKeyboard/Manager/KBEmojiDataProvider.m
index 56f34b9..e660298 100644
--- a/CustomKeyboard/Manager/KBEmojiDataProvider.m
+++ b/CustomKeyboard/Manager/KBEmojiDataProvider.m
@@ -195,6 +195,12 @@ static const NSUInteger kKBEmojiRecentsLimit = 32;
     }
 }
 
+- (void)purgeLargeCaches {
+    self.categoriesInternal = nil;
+    self.itemLookup = nil;
+    self.recentValues = nil;
+}
+
 - (void)onLocalizationChanged:(__unused NSNotification *)note {
     [self refreshLocalizedTitles];
     [[NSNotificationCenter defaultCenter] postNotificationName:KBEmojiRecentsDidChangeNotification object:nil];
diff --git a/CustomKeyboard/Manager/KBSuggestionEngine.m b/CustomKeyboard/Manager/KBSuggestionEngine.m
index ece5fcc..d3f1f92 100644
--- a/CustomKeyboard/Manager/KBSuggestionEngine.m
+++ b/CustomKeyboard/Manager/KBSuggestionEngine.m
@@ -37,15 +37,6 @@
         _selectionCounts = [NSMutableDictionary dictionary];
         NSArray<NSString *> *defaults = [self.class kb_defaultWords];
         _priorityWords = [NSSet setWithArray:defaults];
-        _words = [self kb_loadWords];
-        _traditionalChineseWords = [self kb_loadTraditionalChineseWords];
-        _simplifiedChineseWords = [self kb_loadSimplifiedChineseWords];
-        _pinyinToTraditionalMap = [self kb_loadPinyinToTraditionalMap];
-        _bopomofoToChineseMap = [self kb_loadBopomofoToChineseMap];
-        _spanishWords = [self kb_loadSpanishWords];
-        _englishWords = [self kb_loadEnglishWords];
-        _portugueseWords = [self kb_loadPortugueseWords];
-        _indonesianWords = [self kb_loadIndonesianWords];
     }
     return self;
 }
@@ -190,12 +181,16 @@
     } else {
         self.engineType = KBSuggestionEngineTypeLatin;
     }
+    [self kb_trimCachesForEngineType:self.engineType];
     NSLog(@"[KBSuggestionEngine] Engine type set to: %@", engineTypeString);
 }
 
 #pragma mark - English Suggestions
 
 - (NSArray<NSString *> *)kb_englishSuggestionsForPrefix:(NSString *)prefix limit:(NSUInteger)limit {
+    if (!self.englishWords) {
+        self.englishWords = [self kb_loadEnglishWords];
+    }
     NSArray<NSString *> *matches = [self kb_suggestionsFromWordList:self.englishWords
                                                             prefix:prefix
                                                              limit:limit];
@@ -245,6 +240,9 @@
 #pragma mark - Latin Suggestions
 
 - (NSArray<NSString *> *)kb_latinSuggestionsForPrefix:(NSString *)prefix limit:(NSUInteger)limit {
+    if (!self.words) {
+        self.words = [self kb_loadWords];
+    }
     NSString *lower = prefix.lowercaseString;
     NSMutableArray<NSString *> *matches = [NSMutableArray array];
 
@@ -282,6 +280,9 @@
 #pragma mark - Traditional Chinese Pinyin Suggestions
 
 - (NSArray<NSString *> *)kb_traditionalPinyinSuggestionsForPrefix:(NSString *)prefix limit:(NSUInteger)limit {
+    if (!self.pinyinToTraditionalMap) {
+        self.pinyinToTraditionalMap = [self kb_loadPinyinToTraditionalMap];
+    }
     NSString *lower = prefix.lowercaseString;
     NSMutableArray<NSString *> *matches = [NSMutableArray array];
 
@@ -320,6 +321,9 @@
 }
 
 - (NSArray<NSString *> *)kb_fallbackTraditionalSuggestions:(NSString *)prefix limit:(NSUInteger)limit {
+    if (!self.traditionalChineseWords) {
+        self.traditionalChineseWords = [self kb_loadTraditionalChineseWords];
+    }
     NSMutableArray<NSString *> *matches = [NSMutableArray array];
     for (NSString *word in self.traditionalChineseWords) {
         [matches addObject:word];
@@ -333,6 +337,9 @@
 #pragma mark - Simplified Chinese Pinyin Suggestions
 
 - (NSArray<NSString *> *)kb_simplifiedPinyinSuggestionsForPrefix:(NSString *)prefix limit:(NSUInteger)limit {
+    if (!self.pinyinToTraditionalMap) {
+        self.pinyinToTraditionalMap = [self kb_loadPinyinToTraditionalMap];
+    }
     NSString *lower = prefix.lowercaseString;
     NSMutableArray<NSString *> *matches = [NSMutableArray array];
 
@@ -381,6 +388,9 @@
 }
 
 - (NSArray<NSString *> *)kb_fallbackSimplifiedSuggestions:(NSString *)prefix limit:(NSUInteger)limit {
+    if (!self.simplifiedChineseWords) {
+        self.simplifiedChineseWords = [self kb_loadSimplifiedChineseWords];
+    }
     NSMutableArray<NSString *> *matches = [NSMutableArray array];
     for (NSString *word in self.simplifiedChineseWords) {
         [matches addObject:word];
@@ -447,6 +457,9 @@
 #pragma mark - Bopomofo (Zhuyin) Suggestions
 
 - (NSArray<NSString *> *)kb_bopomofoSuggestionsForPrefix:(NSString *)prefix limit:(NSUInteger)limit {
+    if (!self.bopomofoToChineseMap) {
+        self.bopomofoToChineseMap = [self kb_loadBopomofoToChineseMap];
+    }
     NSMutableArray<NSString *> *matches = [NSMutableArray array];
 
     NSArray<NSString *> *directMatches = self.bopomofoToChineseMap[prefix];
@@ -606,6 +619,9 @@
 #pragma mark - Spanish Suggestions
 
 - (NSArray<NSString *> *)kb_spanishSuggestionsForPrefix:(NSString *)prefix limit:(NSUInteger)limit {
+    if (!self.spanishWords) {
+        self.spanishWords = [self kb_loadSpanishWords];
+    }
     NSArray<NSString *> *matches = [self kb_suggestionsFromWordList:self.spanishWords
                                                             prefix:prefix
                                                              limit:limit];
@@ -655,6 +671,9 @@
 #pragma mark - Portuguese Suggestions
 
 - (NSArray<NSString *> *)kb_portugueseSuggestionsForPrefix:(NSString *)prefix limit:(NSUInteger)limit {
+    if (!self.portugueseWords) {
+        self.portugueseWords = [self kb_loadPortugueseWords];
+    }
     NSArray<NSString *> *matches = [self kb_suggestionsFromWordList:self.portugueseWords
                                                             prefix:prefix
                                                              limit:limit];
@@ -704,6 +723,9 @@
 #pragma mark - Indonesian Suggestions
 
 - (NSArray<NSString *> *)kb_indonesianSuggestionsForPrefix:(NSString *)prefix limit:(NSUInteger)limit {
+    if (!self.indonesianWords) {
+        self.indonesianWords = [self kb_loadIndonesianWords];
+    }
     NSArray<NSString *> *matches = [self kb_suggestionsFromWordList:self.indonesianWords
                                                             prefix:prefix
                                                              limit:limit];
@@ -784,4 +806,78 @@
     return matches.copy;
 }
 
+- (void)kb_trimCachesForEngineType:(KBSuggestionEngineType)engineType {
+    switch (engineType) {
+        case KBSuggestionEngineTypeEnglish:
+            self.spanishWords = nil;
+            self.portugueseWords = nil;
+            self.indonesianWords = nil;
+            self.words = nil;
+            self.traditionalChineseWords = nil;
+            self.simplifiedChineseWords = nil;
+            self.pinyinToTraditionalMap = nil;
+            self.bopomofoToChineseMap = nil;
+            break;
+        case KBSuggestionEngineTypeSpanish:
+            self.englishWords = nil;
+            self.portugueseWords = nil;
+            self.indonesianWords = nil;
+            self.words = nil;
+            self.traditionalChineseWords = nil;
+            self.simplifiedChineseWords = nil;
+            self.pinyinToTraditionalMap = nil;
+            self.bopomofoToChineseMap = nil;
+            break;
+        case KBSuggestionEngineTypePortuguese:
+            self.englishWords = nil;
+            self.spanishWords = nil;
+            self.indonesianWords = nil;
+            self.words = nil;
+            self.traditionalChineseWords = nil;
+            self.simplifiedChineseWords = nil;
+            self.pinyinToTraditionalMap = nil;
+            self.bopomofoToChineseMap = nil;
+            break;
+        case KBSuggestionEngineTypeIndonesian:
+            self.englishWords = nil;
+            self.spanishWords = nil;
+            self.portugueseWords = nil;
+            self.words = nil;
+            self.traditionalChineseWords = nil;
+            self.simplifiedChineseWords = nil;
+            self.pinyinToTraditionalMap = nil;
+            self.bopomofoToChineseMap = nil;
+            break;
+        case KBSuggestionEngineTypePinyinTraditional:
+        case KBSuggestionEngineTypePinyinSimplified:
+            self.words = nil;
+            self.englishWords = nil;
+            self.spanishWords = nil;
+            self.portugueseWords = nil;
+            self.indonesianWords = nil;
+            self.bopomofoToChineseMap = nil;
+            break;
+        case KBSuggestionEngineTypeBopomofo:
+            self.words = nil;
+            self.englishWords = nil;
+            self.spanishWords = nil;
+            self.portugueseWords = nil;
+            self.indonesianWords = nil;
+            self.pinyinToTraditionalMap = nil;
+            self.simplifiedChineseWords = nil;
+            break;
+        case KBSuggestionEngineTypeLatin:
+        default:
+            self.englishWords = nil;
+            self.spanishWords = nil;
+            self.portugueseWords = nil;
+            self.indonesianWords = nil;
+            self.traditionalChineseWords = nil;
+            self.simplifiedChineseWords = nil;
+            self.pinyinToTraditionalMap = nil;
+            self.bopomofoToChineseMap = nil;
+            break;
+    }
+}
+
 @end
diff --git a/CustomKeyboard/View/EmojiView/KBEmojiPanelView.h b/CustomKeyboard/View/EmojiView/KBEmojiPanelView.h
index d58cd1d..706b367 100644
--- a/CustomKeyboard/View/EmojiView/KBEmojiPanelView.h
+++ b/CustomKeyboard/View/EmojiView/KBEmojiPanelView.h
@@ -30,6 +30,9 @@ NS_ASSUME_NONNULL_BEGIN
 /// 高亮指定分类
 - (void)selectCategoryAtIndex:(NSInteger)index;
 
+/// 释放 emoji 数据缓存（隐藏面板时可用）
+- (void)purgeEmojiCache;
+
 @end
 
 NS_ASSUME_NONNULL_END
diff --git a/CustomKeyboard/View/EmojiView/KBEmojiPanelView.m b/CustomKeyboard/View/EmojiView/KBEmojiPanelView.m
index ecc1117..00a20b7 100644
--- a/CustomKeyboard/View/EmojiView/KBEmojiPanelView.m
+++ b/CustomKeyboard/View/EmojiView/KBEmojiPanelView.m
@@ -185,6 +185,15 @@
     [self updateSelectionToIndex:preserved];
 }
 
+- (void)purgeEmojiCache {
+    [self.dataProvider purgeLargeCaches];
+    self.categories = @[];
+    self.currentIndex = NSNotFound;
+    self.titleLabel.text = @"";
+    [self rebuildTabButtons];
+    [self.collectionView reloadData];
+}
+
 - (void)rebuildTabButtons {
     UIStackView *stackView = self.bottomBar.tabStackView;
     if (!stackView) { return; }
diff --git a/CustomKeyboard/View/KBKeyBoardMainView.m b/CustomKeyboard/View/KBKeyBoardMainView.m
index 90b249f..fdef548 100644
--- a/CustomKeyboard/View/KBKeyBoardMainView.m
+++ b/CustomKeyboard/View/KBKeyBoardMainView.m
@@ -66,14 +66,7 @@
             make.bottom.equalTo(self.mas_bottom).offset(-bottomInset);
         }];
 
-        self.emojiView = [[KBEmojiPanelView alloc] init];
-        self.emojiView.hidden = YES;
-        self.emojiView.alpha = 0.0;
-        self.emojiView.delegate = self;
-        [self addSubview:self.emojiView];
-        [self.emojiView mas_makeConstraints:^(MASConstraintMaker *make) {
-            make.edges.equalTo(self);
-        }];
+        // emoji 面板改为按需创建
 
 //        [self.topBar mas_makeConstraints:^(MASConstraintMaker *make) {
 //            make.left.right.equalTo(self);
@@ -116,9 +109,10 @@
     if (self.emojiPanelVisible == visible) return;
     self.emojiPanelVisible = visible;
     if (visible) {
-        [self.emojiView reloadData];
-        self.emojiView.hidden = NO;
-        [self bringSubviewToFront:self.emojiView];
+        KBEmojiPanelView *emojiView = [self emojiView];
+        [emojiView reloadData];
+        emojiView.hidden = NO;
+        [self bringSubviewToFront:emojiView];
     } else {
         self.keyboardView.hidden = NO;
         self.topBar.hidden = NO;
@@ -126,19 +120,28 @@
     }
 
     void (^changes)(void) = ^{
-        self.emojiView.alpha = visible ? 1.0 : 0.0;
+        if (self.emojiView) {
+            self.emojiView.alpha = visible ? 1.0 : 0.0;
+        }
         self.keyboardView.alpha = visible ? 0.0 : 1.0;
         self.topBar.alpha = visible ? 0.0 : 1.0;
         self.suggestionBar.alpha = visible ? 0.0 : ([self kb_shouldShowSuggestions] ? 1.0 : 0.0);
     };
     void (^completion)(BOOL) = ^(BOOL finished) {
-        self.emojiView.hidden = !visible;
+        if (self.emojiView) {
+            self.emojiView.hidden = !visible;
+        }
         self.keyboardView.hidden = visible;
         self.topBar.hidden = visible;
         if (visible) {
             self.suggestionBar.hidden = YES;
         } else {
             self.suggestionBar.hidden = ![self kb_shouldShowSuggestions];
+            if (self.emojiView) {
+                [self.emojiView purgeEmojiCache];
+                [self.emojiView removeFromSuperview];
+                self.emojiView = nil;
+            }
         }
     };
 
@@ -154,6 +157,22 @@
     [self setEmojiPanelVisible:!self.emojiPanelVisible animated:YES];
 }
 
+#pragma mark - Lazy Load
+
+- (KBEmojiPanelView *)emojiView {
+    if (!_emojiView) {
+        _emojiView = [[KBEmojiPanelView alloc] init];
+        _emojiView.hidden = YES;
+        _emojiView.alpha = 0.0;
+        _emojiView.delegate = self;
+        [self addSubview:_emojiView];
+        [_emojiView mas_makeConstraints:^(MASConstraintMaker *make) {
+            make.edges.equalTo(self);
+        }];
+    }
+    return _emojiView;
+}
+
 
 #pragma mark - KBToolBarDelegate