File size: 100,498 Bytes
b4a93f3
 
 
 
 
 
 
 
 
 
98c4e5f
 
c465c27
9b39583
7a399ee
 
 
7767ac9
 
 
7a399ee
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
b4a93f3
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
98c4e5f
 
 
 
 
 
7a399ee
 
 
 
7767ac9
 
 
 
 
 
 
 
 
b4a93f3
 
 
 
 
 
cc15ff9
b4a93f3
 
 
 
 
 
 
 
 
 
66cf72a
 
 
 
 
 
 
 
 
 
 
 
 
 
b4a93f3
cc15ff9
 
 
7c9c1fc
 
7a399ee
7c9c1fc
cc15ff9
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
7a399ee
cc15ff9
 
 
7a399ee
 
 
 
 
 
 
 
cc15ff9
66cf72a
853b09a
cc15ff9
 
b4a93f3
 
 
 
 
 
 
 
 
 
 
 
 
cc15ff9
 
 
7767ac9
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
cc15ff9
 
7767ac9
 
 
 
 
 
 
7a399ee
7767ac9
 
 
 
 
 
 
 
 
 
 
 
 
 
7a399ee
7767ac9
 
 
 
 
 
 
 
7a399ee
7767ac9
7a399ee
 
 
cc15ff9
7767ac9
 
 
 
 
b4a93f3
 
 
7767ac9
 
b4a93f3
7767ac9
 
 
 
 
 
 
 
 
 
b4a93f3
7767ac9
 
 
b4a93f3
7767ac9
 
 
 
b4a93f3
 
7767ac9
b4a93f3
7767ac9
 
b4a93f3
7767ac9
 
 
 
b4a93f3
7767ac9
b4a93f3
7767ac9
 
 
 
 
b4a93f3
7767ac9
 
b4a93f3
 
7767ac9
 
 
 
 
 
 
 
 
 
 
7a399ee
 
 
7767ac9
 
 
 
 
 
66cf72a
7767ac9
 
 
 
 
 
 
b4a93f3
66cf72a
7767ac9
 
 
 
 
 
 
 
b4a93f3
 
7767ac9
 
 
 
 
 
 
 
 
 
b4a93f3
c4ac625
7767ac9
 
 
 
 
 
 
 
 
 
 
 
 
 
 
853b09a
7767ac9
 
 
 
 
 
853b09a
7767ac9
 
 
 
 
 
853b09a
 
 
 
66cf72a
c4ac625
 
 
 
853b09a
c4ac625
 
 
 
 
 
cc15ff9
22397d6
 
 
 
 
 
 
 
 
 
 
7767ac9
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
22397d6
b4a93f3
7767ac9
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
b4a93f3
7767ac9
b4a93f3
7767ac9
 
 
 
 
 
 
 
 
 
 
 
 
 
 
cc15ff9
7767ac9
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
cc15ff9
7767ac9
 
cc15ff9
7767ac9
 
 
 
 
 
 
 
 
 
 
 
 
b4a93f3
7767ac9
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
7a399ee
7767ac9
 
 
 
 
 
 
b4a93f3
7767ac9
 
 
b4a93f3
7767ac9
 
 
 
 
 
 
b4a93f3
7767ac9
 
 
 
 
 
 
7a399ee
7767ac9
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
5adc53b
7767ac9
 
 
 
 
 
 
 
 
 
5adc53b
7a399ee
7767ac9
 
b4a93f3
7767ac9
 
 
 
 
 
b4a93f3
7767ac9
 
 
 
 
 
 
 
 
 
b4a93f3
 
7767ac9
b4a93f3
7767ac9
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
b4a93f3
7767ac9
 
 
 
 
 
 
 
b4a93f3
7767ac9
 
 
 
 
 
 
 
 
b4a93f3
7767ac9
 
 
 
 
 
 
 
 
 
 
b4a93f3
7767ac9
 
 
 
 
 
 
 
 
 
 
 
b4a93f3
7767ac9
 
 
 
 
 
 
 
 
 
b4a93f3
7767ac9
 
 
 
 
 
 
 
 
 
 
 
 
b4a93f3
7767ac9
 
b4a93f3
7767ac9
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
b4a93f3
5adc53b
7767ac9
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
66cf72a
7767ac9
 
 
 
 
 
 
66cf72a
7767ac9
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
b4a93f3
7767ac9
b4a93f3
 
7767ac9
 
 
 
 
 
 
 
 
b4a93f3
7767ac9
 
 
 
 
 
 
 
b4a93f3
7767ac9
 
 
 
 
853b09a
7767ac9
 
 
 
 
853b09a
7767ac9
 
 
b4a93f3
7767ac9
 
 
 
 
 
 
 
22397d6
7767ac9
 
 
22397d6
7767ac9
 
 
 
22397d6
7767ac9
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
7a399ee
66cf72a
7767ac9
 
22397d6
7767ac9
22397d6
7767ac9
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
b4a93f3
7767ac9
 
 
 
 
66cf72a
22397d6
b4a93f3
7767ac9
 
 
 
7dfc638
7767ac9
 
 
 
 
66cf72a
7767ac9
 
 
 
 
 
 
 
 
 
 
 
22397d6
7767ac9
22397d6
 
b4a93f3
22397d6
b4a93f3
7767ac9
 
 
 
 
 
 
b4a93f3
 
7767ac9
b4a93f3
7767ac9
 
 
 
 
 
 
 
b4a93f3
7767ac9
 
 
 
 
 
 
 
 
 
 
 
 
 
b4a93f3
7767ac9
 
 
 
 
 
 
 
b4a93f3
7767ac9
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
b4a93f3
7767ac9
 
 
 
 
 
 
 
 
 
 
 
 
b4a93f3
7767ac9
 
b4a93f3
7767ac9
 
 
b4a93f3
7767ac9
b4a93f3
7767ac9
b4a93f3
 
7767ac9
 
b4a93f3
7767ac9
 
 
 
 
b4a93f3
7767ac9
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
b4a93f3
7767ac9
 
 
 
 
c465c27
7767ac9
 
 
 
 
 
c465c27
7767ac9
c465c27
7767ac9
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
c465c27
7767ac9
 
 
 
c465c27
7767ac9
c465c27
7767ac9
 
 
 
 
c465c27
7767ac9
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
c465c27
 
 
 
 
 
 
b4a93f3
7767ac9
 
 
 
 
b4a93f3
 
7767ac9
 
 
 
853b09a
7767ac9
 
 
 
 
 
 
 
 
 
 
 
 
 
 
98c4e5f
7767ac9
 
 
7a399ee
7767ac9
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
7a399ee
7767ac9
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
7a399ee
 
5adc53b
7767ac9
 
 
 
 
 
 
 
 
 
 
 
 
 
 
7a399ee
7767ac9
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
7a399ee
 
 
7767ac9
7a399ee
 
 
7767ac9
 
 
 
 
 
 
 
 
 
 
 
 
 
 
7a399ee
7767ac9
 
 
 
7a399ee
7767ac9
 
 
 
 
 
7a399ee
7767ac9
7a399ee
7767ac9
 
 
 
 
 
 
 
 
 
 
 
7c9c1fc
7767ac9
 
 
 
 
 
 
 
 
7dfc638
7767ac9
 
66cf72a
7767ac9
66cf72a
7767ac9
 
 
 
 
 
 
 
7a399ee
7767ac9
 
7a399ee
 
 
7767ac9
7a399ee
7767ac9
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
7a399ee
 
7767ac9
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
7a399ee
7767ac9
 
 
7a399ee
7767ac9
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
22397d6
7767ac9
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
7a399ee
7767ac9
 
 
 
 
 
 
 
7a399ee
7767ac9
 
 
 
 
 
 
b4a93f3
7767ac9
 
 
 
 
 
 
7a399ee
7767ac9
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
7a399ee
7767ac9
7a399ee
b4a93f3
7767ac9
b4a93f3
7767ac9
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
b4a93f3
7767ac9
 
 
 
 
 
 
 
 
b4a93f3
7767ac9
 
 
 
 
 
 
 
 
 
b4a93f3
7767ac9
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
7a399ee
7767ac9
 
 
 
 
 
 
 
b4a93f3
7767ac9
 
 
 
 
 
 
 
 
 
 
 
 
 
b4a93f3
7767ac9
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
b4a93f3
 
06a752e
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
708
709
710
711
712
713
714
715
716
717
718
719
720
721
722
723
724
725
726
727
728
729
730
731
732
733
734
735
736
737
738
739
740
741
742
743
744
745
746
747
748
749
750
751
752
753
754
755
756
757
758
759
760
761
762
763
764
765
766
767
768
769
770
771
772
773
774
775
776
777
778
779
780
781
782
783
784
785
786
787
788
789
790
791
792
793
794
795
796
797
798
799
800
801
802
803
804
805
806
807
808
809
810
811
812
813
814
815
816
817
818
819
820
821
822
823
824
825
826
827
828
829
830
831
832
833
834
835
836
837
838
839
840
841
842
843
844
845
846
847
848
849
850
851
852
853
854
855
856
857
858
859
860
861
862
863
864
865
866
867
868
869
870
871
872
873
874
875
876
877
878
879
880
881
882
883
884
885
886
887
888
889
890
891
892
893
894
895
896
897
898
899
900
901
902
903
904
905
906
907
908
909
910
911
912
913
914
915
916
917
918
919
920
921
922
923
924
925
926
927
928
929
930
931
932
933
934
935
936
937
938
939
940
941
942
943
944
945
946
947
948
949
950
951
952
953
954
955
956
957
958
959
960
961
962
963
964
965
966
967
968
969
970
971
972
973
974
975
976
977
978
979
980
981
982
983
984
985
986
987
988
989
990
991
992
993
994
995
996
997
998
999
1000
1001
1002
1003
1004
1005
1006
1007
1008
1009
1010
1011
1012
1013
1014
1015
1016
1017
1018
1019
1020
1021
1022
1023
1024
1025
1026
1027
1028
1029
1030
1031
1032
1033
1034
1035
1036
1037
1038
1039
1040
1041
1042
1043
1044
1045
1046
1047
1048
1049
1050
1051
1052
1053
1054
1055
1056
1057
1058
1059
1060
1061
1062
1063
1064
1065
1066
1067
1068
1069
1070
1071
1072
1073
1074
1075
1076
1077
1078
1079
1080
1081
1082
1083
1084
1085
1086
1087
1088
1089
1090
1091
1092
1093
1094
1095
1096
1097
1098
1099
1100
1101
1102
1103
1104
1105
1106
1107
1108
1109
1110
1111
1112
1113
1114
1115
1116
1117
1118
1119
1120
1121
1122
1123
1124
1125
1126
1127
1128
1129
1130
1131
1132
1133
1134
1135
1136
1137
1138
1139
1140
1141
1142
1143
1144
1145
1146
1147
1148
1149
1150
1151
1152
1153
1154
1155
1156
1157
1158
1159
1160
1161
1162
1163
1164
1165
1166
1167
1168
1169
1170
1171
1172
1173
1174
1175
1176
1177
1178
1179
1180
1181
1182
1183
1184
1185
1186
1187
1188
1189
1190
1191
1192
1193
1194
1195
1196
1197
1198
1199
1200
1201
1202
1203
1204
1205
1206
1207
1208
1209
1210
1211
1212
1213
1214
1215
1216
1217
1218
1219
1220
1221
1222
1223
1224
1225
1226
1227
1228
1229
1230
1231
1232
1233
1234
1235
1236
1237
1238
1239
1240
1241
1242
1243
1244
1245
1246
1247
1248
1249
1250
1251
1252
1253
1254
1255
1256
1257
1258
1259
1260
1261
1262
1263
1264
1265
1266
1267
1268
1269
1270
1271
1272
1273
1274
1275
1276
1277
1278
1279
1280
1281
1282
1283
1284
1285
1286
1287
1288
1289
1290
1291
1292
1293
1294
1295
1296
1297
1298
1299
1300
1301
1302
1303
1304
1305
1306
1307
1308
1309
1310
1311
1312
1313
1314
1315
1316
1317
1318
1319
1320
1321
1322
1323
1324
1325
1326
1327
1328
1329
1330
1331
1332
1333
1334
1335
1336
1337
1338
1339
1340
1341
1342
1343
1344
1345
1346
1347
1348
1349
1350
1351
1352
1353
1354
1355
1356
1357
1358
1359
1360
1361
1362
1363
1364
1365
1366
1367
1368
1369
1370
1371
1372
1373
1374
1375
1376
1377
1378
1379
1380
1381
1382
1383
1384
1385
1386
1387
1388
1389
1390
1391
1392
1393
1394
1395
1396
1397
1398
1399
1400
1401
1402
1403
1404
1405
1406
1407
1408
1409
1410
1411
1412
1413
1414
1415
1416
1417
1418
1419
1420
1421
1422
1423
1424
1425
1426
1427
1428
1429
1430
1431
1432
1433
1434
1435
1436
1437
1438
1439
1440
1441
1442
1443
1444
1445
1446
1447
1448
1449
1450
1451
1452
1453
1454
1455
1456
1457
1458
1459
1460
1461
1462
1463
1464
1465
1466
1467
1468
1469
1470
1471
1472
1473
1474
1475
1476
1477
1478
1479
1480
1481
1482
1483
1484
1485
1486
1487
1488
1489
1490
1491
1492
1493
1494
1495
1496
1497
1498
1499
1500
1501
1502
1503
1504
1505
1506
1507
1508
1509
1510
1511
1512
1513
1514
1515
1516
1517
1518
1519
1520
1521
1522
1523
1524
1525
1526
1527
1528
1529
1530
1531
1532
1533
1534
1535
1536
1537
1538
1539
1540
1541
1542
1543
1544
1545
1546
1547
1548
1549
1550
1551
1552
1553
1554
1555
1556
1557
1558
1559
1560
1561
1562
1563
1564
1565
1566
1567
1568
1569
1570
1571
1572
1573
1574
1575
1576
1577
1578
1579
1580
1581
1582
1583
1584
1585
1586
1587
1588
1589
1590
1591
1592
1593
1594
1595
1596
1597
1598
1599
1600
1601
1602
1603
1604
1605
1606
1607
1608
1609
1610
1611
1612
1613
1614
1615
1616
1617
1618
1619
1620
1621
1622
1623
1624
1625
1626
1627
1628
1629
1630
1631
1632
1633
1634
1635
1636
1637
1638
1639
1640
1641
1642
1643
1644
1645
1646
1647
1648
1649
1650
1651
1652
1653
1654
1655
1656
1657
1658
1659
1660
1661
1662
1663
1664
1665
1666
1667
1668
1669
1670
1671
1672
1673
1674
1675
1676
1677
1678
1679
1680
1681
1682
1683
1684
1685
1686
1687
1688
1689
1690
1691
1692
1693
1694
1695
1696
1697
1698
1699
1700
1701
1702
1703
1704
1705
1706
1707
1708
1709
1710
1711
1712
1713
1714
1715
1716
1717
1718
1719
1720
1721
1722
1723
1724
1725
1726
1727
1728
1729
1730
1731
1732
1733
1734
1735
1736
1737
1738
1739
1740
1741
1742
1743
1744
1745
1746
1747
1748
1749
1750
1751
1752
1753
1754
1755
1756
1757
1758
1759
1760
1761
1762
1763
1764
1765
1766
1767
1768
1769
1770
1771
1772
1773
1774
1775
1776
1777
1778
1779
1780
1781
1782
1783
1784
1785
1786
1787
1788
1789
1790
1791
1792
1793
1794
1795
1796
1797
1798
1799
1800
1801
1802
1803
1804
1805
1806
1807
1808
1809
1810
1811
1812
1813
1814
1815
1816
1817
1818
1819
1820
1821
1822
1823
1824
1825
1826
1827
1828
1829
1830
1831
1832
1833
1834
1835
1836
1837
1838
1839
1840
1841
1842
1843
1844
1845
1846
1847
1848
1849
1850
1851
1852
1853
1854
1855
1856
1857
1858
1859
1860
1861
1862
1863
1864
1865
1866
1867
1868
1869
1870
1871
1872
1873
1874
1875
1876
1877
1878
1879
1880
1881
1882
1883
1884
1885
1886
1887
1888
1889
1890
1891
1892
1893
1894
1895
1896
1897
1898
1899
1900
1901
1902
1903
1904
1905
1906
1907
1908
1909
1910
1911
1912
1913
1914
1915
1916
1917
1918
1919
1920
1921
1922
1923
1924
1925
1926
1927
1928
1929
1930
1931
1932
1933
1934
1935
1936
1937
1938
1939
1940
1941
1942
1943
1944
1945
1946
1947
1948
1949
1950
1951
1952
1953
1954
1955
1956
1957
1958
1959
1960
1961
1962
1963
1964
1965
1966
1967
1968
1969
1970
1971
1972
1973
1974
1975
1976
1977
1978
1979
1980
1981
1982
1983
1984
1985
1986
1987
1988
1989
1990
1991
1992
1993
1994
1995
1996
1997
1998
1999
2000
2001
2002
2003
2004
2005
2006
2007
2008
2009
2010
2011
2012
2013
2014
2015
2016
2017
2018
2019
2020
2021
2022
2023
2024
2025
2026
2027
2028
2029
2030
2031
2032
2033
2034
2035
2036
2037
2038
2039
2040
2041
2042
2043
2044
2045
2046
2047
2048
2049
2050
2051
2052
2053
2054
2055
2056
2057
2058
2059
2060
2061
2062
2063
2064
2065
2066
2067
2068
2069
2070
2071
2072
2073
2074
2075
2076
2077
2078
2079
2080
2081
2082
2083
2084
2085
2086
2087
2088
2089
2090
2091
2092
2093
2094
2095
2096
2097
2098
2099
2100
<!DOCTYPE html>
<html lang="zh-Hant">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>單字閃卡</title>
    <!-- 載入 Tailwind CSS CDN -->
    <script src="https://cdn.tailwindcss.com"></script>
    <!-- 載入彩帶效果庫 -->
    <script src="https://cdn.jsdelivr.net/npm/canvas-confetti@1.9.2/dist/confetti.browser.min.js"></script>
    <!-- 載入 QR Code 產生器 -->
    <script src="https://cdn.jsdelivr.net/npm/qrcode-generator/qrcode.js"></script>
    <!-- 載入 Pako 壓縮函式庫 -->
    <script src="https://cdnjs.cloudflare.com/ajax/libs/pako/2.1.0/pako.min.js"></script>
    <!-- 載入 PDF.js 函式庫 -->
    <script src="https://cdnjs.cloudflare.com/ajax/libs/pdf.js/2.11.338/pdf.min.js"></script>
    
    <!-- 【新增】載入 Google Handwriting Input API (IME) -->
    <script src="https://www.google.com/inputtools/request?ime=handwriting&app=gws&cs=1&oe=UTF-8&ss=1&v=3" async></script>
    
    <!-- 【新】Firebase SDK -->
    <script type="module">
        import { initializeApp } from "https://www.gstatic.com/firebasejs/9.15.0/firebase-app.js";
        import { getFirestore, collection, addDoc, getDoc, doc } from "https://www.gstatic.com/firebasejs/9.15.0/firebase-firestore.js";

        // 您的 Firebase 設定金鑰
        const firebaseConfig = {
          apiKey: "AIzaSyAIRUONOLmA1pe42cmH_MNPgGC3oHKuceo",
          authDomain: "englishflashcardbackstage.firebaseapp.com",
          projectId: "englishflashcardbackstage",
          storageBucket: "englishflashcardbackstage.firebasestorage.app",
          messagingSenderId: "911755356145",
          appId: "1:911755356145:web:a4a5b0245b3bb9f15d4650"
        };

        // 初始化 Firebase
        const app = initializeApp(firebaseConfig);
        const db = getFirestore(app);

        // 將 db 實例暴露到全域,以便主腳本可以存取
        window.firebaseDB = db;
        window.firebaseFirestore = { collection, addDoc, getDoc, doc };
    </script>
    
    <style>
        /* 定義閃卡的翻轉效果 */
        .flip-container {
            perspective: 1000px;
        }
        .flipper {
            transition: transform 0.6s;
            transform-style: preserve-3d;
            position: relative;
        }
        .flip-container.flipped .flipper {
            transform: rotateY(180deg);
        }
        .front, .back {
            backface-visibility: hidden;
            position: absolute;
            top: 0;
            left: 0;
            width: 100%;
            height: 100%;
            display: flex;
            align-items: center;
            justify-content: center;
            padding: 1.5rem;
            border-radius: 1.5rem;
            box-shadow: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 10px 10px -5px rgba(0, 0, 0, 0.04);
            color: white;
            text-align: center;
            background: linear-gradient(135deg, var(--tw-gradient-from), var(--tw-gradient-to));
        }
        .front {
            z-index: 2;
            transform: rotateY(0deg);
            --tw-gradient-from: #6366f1; /* Indigo-500 */
            --tw-gradient-to: #4f46e5;   /* Indigo-600 */
        }
        .back {
            transform: rotateY(180deg);
            --tw-gradient-from: #a78bfa; /* Violet-400 */
            --tw-gradient-to: #c4b5fd;   /* Violet-300 */
        }
        /* 答錯時的晃動動畫 */
        @keyframes shake {
            10%, 90% { transform: translate3d(-1px, 0, 0); }
            20%, 80% { transform: translate3d(2px, 0, 0); }
            30%, 50%, 70% { transform: translate3d(-4px, 0, 0); }
            40%, 60% { transform: translate3d(4px, 0, 0); }
        }
        .shake {
            animation: shake 0.82s cubic-bezier(.36,.07,.19,.97) both;
        }
        .timer-highlight {
            animation: pulse 1.5s infinite;
        }
        @keyframes pulse {
            50% { transform: scale(1.1); }
        }
        .speak-btn:disabled {
            opacity: 0.5;
            cursor: not-allowed;
        }
         /* 列表動畫 */
        .list-item {
            transition: all 0.3s ease-out;
            opacity: 1;
            transform: translateX(0);
        }
        .list-item.removing {
            opacity: 0;
            transform: translateX(100%);
        }
        #qrcode-container img {
            margin: auto;
            border: 6px solid white;
            border-radius: 10px;
            box-shadow: 0 4px 6px rgba(0,0,0,0.1);
        }
        /* 進度條動畫 */
        #ai-progress-bar-inner, #audio-preload-bar {
            transition: width 0.3s ease-in-out;
        }
        
        /* 【新增】手寫輸入框樣式 */
        .handwriting-input {
            font-size: 1.5rem; /* 放大字體 */
            padding: 1rem; /* 增加內邊距 */
            text-align: center;
            border: 3px solid #4f46e5; /* 醒目的邊框 */
            box-shadow: 0 0 10px rgba(79, 70, 229, 0.5); /* 陰影 */
        }
    </style>
</head>
<body class="bg-gray-50 min-h-screen flex flex-col items-center p-4 sm:p-8 font-sans">

    <!-- 主選單:新增單字 & 模式選擇 -->
    <div id="main-menu" class="w-full max-w-2xl bg-white p-6 rounded-3xl shadow-2xl transition-all duration-500">
        <h1 id="main-title" class="text-4xl font-extrabold text-center text-gray-900 mb-6"></h1>
        
        <!-- 模式選擇區塊 -->
        <div id="mode-selection-section">
            <div class="flex justify-between items-center mb-4">
                <h2 class="text-2xl font-bold text-gray-800">選擇學習模式</h2>
                <div class="text-right">
                    <p class="text-sm text-gray-500">極速挑戰最高分</p>
                    <p id="highscore-display" class="text-lg font-bold text-amber-500">0</p>
                </div>
            </div>
            <!-- 單字範圍與隨機出題選擇 -->
            <div id="settings-container" class="my-4 p-4 bg-gray-100 rounded-2xl space-y-3">
                <div class="flex items-center justify-center gap-4">
                    <label for="start-range" class="font-semibold text-gray-700">單字範圍:</label>
                    <input type="number" id="start-range" min="1" class="w-20 p-2 border border-gray-300 rounded-lg text-center" placeholder="從">
                    <span class="font-semibold text-gray-700">-</span>
                    <input type="number" id="end-range" min="1" class="w-20 p-2 border border-gray-300 rounded-lg text-center" placeholder="到">
                </div>
                <div class="flex items-center justify-center gap-4">
                    <input type="checkbox" id="random-questions-checkbox" class="h-5 w-5 rounded text-indigo-600 focus:ring-indigo-500 border-gray-300">
                    <label for="random-questions-checkbox" class="font-semibold text-gray-700">隨機出題:</label>
                    <input type="number" id="random-questions-count" min="1" class="w-20 p-2 border border-gray-300 rounded-lg text-center disabled:bg-gray-200 disabled:cursor-not-allowed" placeholder="題數" disabled>
                    <span class="font-semibold text-gray-700"></span>
                </div>
            </div>
            
            <!-- 主要功能 -->
            <div class="mb-4">
                <div class="relative mb-3 border-b pb-2">
                    <h3 class="text-lg font-semibold text-gray-600 text-center">主要功能</h3>
                    <button id="reset-crowns-btn" class="absolute right-0 top-1/2 -translate-y-1/2 text-xs bg-gray-200 hover:bg-gray-300 text-gray-700 font-semibold py-1 px-3 rounded-full transition-colors disabled:bg-gray-300">重置進度</button>
                </div>
                <div class="grid grid-cols-1 sm:grid-cols-2 gap-4">
                    <button data-mode="review" class="mode-btn bg-sky-500 hover:bg-sky-600">複習模式</button>
                    <button data-mode="zh-en" class="mode-btn bg-teal-500 hover:bg-teal-600 relative">
                        中翻英測驗
                        <span class="crown-icon hidden absolute -top-2 -right-1 text-4xl" style="transform: rotate(15deg);">👑</span>
                    </button>
                    <button data-mode="en-zh" class="mode-btn bg-amber-500 hover:bg-amber-600 relative">
                        英翻中測驗
                        <span class="crown-icon hidden absolute -top-2 -right-1 text-4xl" style="transform: rotate(15deg);">👑</span>
                    </button>
                    <button data-mode="listen" class="mode-btn bg-rose-500 hover:bg-rose-600 relative">
                        聽力測驗
                        <span class="crown-icon hidden absolute -top-2 -right-1 text-4xl" style="transform: rotate(15deg);">👑</span>
                    </button>
                </div>
            </div>

            <!-- 補充功能 -->
            <div class="mb-4">
                <h3 class="text-lg font-semibold text-gray-600 mb-3 text-center border-b pb-2">補充功能</h3>
                <div class="grid grid-cols-1 sm:grid-cols-2 gap-4">
                    <button data-mode="hard" class="mode-btn bg-red-700 hover:bg-red-800">🧠 困難單字複習</button>
                    <button data-mode="speed" class="mode-btn bg-slate-700 hover:bg-slate-800">⚡ 極速挑戰 ⚡</button>
                    <button data-mode="sentence-cloze" class="mode-btn bg-cyan-600 hover:bg-cyan-700">📝 情境克漏字</button>
                </div>
            </div>
            
            <!-- Audio Preload Progress -->
            <div id="audio-preload-container" class="hidden mt-4">
                <p id="audio-preload-text" class="text-sm text-center text-gray-500 mb-1">正在預載語音檔案...</p>
                <div class="w-full bg-gray-200 rounded-full h-2.5">
                    <div id="audio-preload-bar" class="bg-sky-600 h-2.5 rounded-full" style="width: 0%"></div>
                </div>
            </div>

            <!-- 教師工具 -->
            <div id="teacher-tools" class="mt-8 pt-4 border-t flex justify-end items-center gap-3">
                 <button id="grade-report-btn" class="text-white font-semibold py-2 px-5 rounded-full transition-transform hover:scale-105 bg-blue-500 hover:bg-blue-600 text-sm">📊 成績報告</button>
                 <button id="share-game-btn" class="text-white font-semibold py-2 px-5 rounded-full transition-transform hover:scale-105 bg-violet-500 hover:bg-violet-600 text-sm">🔗 分享</button>
                 <button id="manage-words-btn" class="text-white font-semibold py-2 px-5 rounded-full transition-transform hover:scale-105 bg-gray-500 hover:bg-gray-600 text-sm">⚙️ 管理</button>
            </div>
        </div>
    </div>
    
    <!-- 單字管理介面 (預設隱藏) -->
    <div id="word-management-view" class="hidden w-full max-w-4xl bg-white p-6 rounded-3xl shadow-2xl">
        <div class="flex justify-between items-center mb-6">
            <h2 class="text-3xl font-bold text-gray-800">單字列表管理</h2>
            <button id="back-to-modes-from-manage-btn" class="bg-gray-200 text-gray-800 p-3 rounded-full hover:bg-gray-300 transition-colors">
                 <svg xmlns="http://www.w3.org/2000/svg" class="h-6 w-6" fill="none" viewBox="0 0 24 24" stroke="currentColor"><path stroke-linecap="round" stroke-linejoin="round" stroke-width="2" d="M6 18L18 6M6 6l12 12" /></svg>
            </button>
        </div>
        
        <!-- 標題設定區塊 -->
        <div class="mb-6 p-4 bg-gray-50 rounded-2xl">
            <h3 class="text-xl font-semibold mb-4 text-gray-700">標題設定</h3>
            <input type="text" id="title-input" placeholder="輸入您的單字本標題" class="w-full p-3 border border-gray-300 rounded-lg focus:ring-indigo-500 focus:border-indigo-500 text-lg mb-3">
            <button id="save-title-btn" class="w-full bg-indigo-500 text-white p-3 rounded-lg font-semibold hover:bg-indigo-600 transition-colors">儲存標題</button>
        </div>
        
        <!-- 【新增】版本鎖定設定區塊 -->
        <div class="mb-6 p-4 bg-indigo-50 rounded-2xl">
            <h3 class="text-xl font-semibold mb-4 text-gray-700">版本鎖定設定 (分享時生效)</h3>
            <div class="flex items-center space-x-4">
                <label class="flex items-center">
                    <input type="radio" name="version-lock" value="auto" id="lock-auto" class="h-4 w-4 text-indigo-600 border-gray-300 focus:ring-indigo-500" checked>
                    <span class="ml-2 text-gray-700">自動判斷 (預設)</span>
                </label>
                <label class="flex items-center">
                    <input type="radio" name="version-lock" value="pc" id="lock-pc" class="h-4 w-4 text-indigo-600 border-gray-300 focus:ring-indigo-500">
                    <span class="ml-2 text-gray-700">鎖定 PC 版 (打字)</span>
                </label>
                <label class="flex items-center">
                    <input type="radio" name="version-lock" value="mobile" id="lock-mobile" class="h-4 w-4 text-indigo-600 border-gray-300 focus:ring-indigo-500">
                    <span class="ml-2 text-gray-700">鎖定 行動版 (手寫)</span>
                </label>
            </div>
        </div>
        
        <!-- 單字新增區塊 -->
        <div class="mb-6 p-4 bg-gray-50 rounded-2xl">
            <h3 class="text-xl font-semibold mb-4 text-gray-700">手動新增單字</h3>
            <div class="grid grid-cols-1 sm:grid-cols-2 gap-4 mb-4">
                <input type="text" id="new-english" placeholder="英文單字 (含詞性)" class="p-3 border border-gray-300 rounded-lg">
                <input type="text" id="new-chinese" placeholder="中文翻譯" class="p-3 border border-gray-300 rounded-lg">
            </div>
            <div class="grid grid-cols-1 sm:grid-cols-3 gap-4 mb-4">
                <input type="text" id="new-sentence-en" placeholder="英文例句 (用___代替單字)" class="p-3 border border-gray-300 rounded-lg col-span-2">
                <input type="text" id="new-sentence-answer" placeholder="克漏字答案" class="p-3 border border-gray-300 rounded-lg">
            </div>
            <input type="text" id="new-sentence-zh" placeholder="中文例句翻譯" class="w-full p-3 border border-gray-300 rounded-lg mb-4">
            <button id="add-word-btn" class="w-full bg-green-500 text-white p-3 rounded-lg font-semibold hover:bg-green-600 transition-colors">新增單字</button>
        </div>
        
        <!-- PDF/文字解析區塊 -->
        <div class="mb-6 p-4 bg-gray-50 rounded-2xl">
            <h3 class="text-xl font-semibold mb-4 text-gray-700">PDF/文字 AI 解析新增</h3>
            <div class="flex items-center space-x-4 mb-4">
                <input type="text" id="api-key-input" placeholder="輸入您的 Gemini API Key" class="flex-1 p-3 border border-gray-300 rounded-lg">
                <button id="save-api-key-btn" class="bg-blue-500 text-white p-3 rounded-lg font-semibold hover:bg-blue-600 transition-colors">儲存 Key</button>
            </div>
            <input type="file" id="pdf-upload-input" accept=".pdf" class="w-full p-3 border border-gray-300 rounded-lg mb-4 bg-white">
            <textarea id="text-input" placeholder="或直接貼上文字內容" rows="5" class="w-full p-3 border border-gray-300 rounded-lg mb-4"></textarea>
            <button id="parse-pdf-btn" class="w-full bg-purple-500 text-white p-3 rounded-lg font-semibold hover:bg-purple-600 transition-colors">開始 AI 解析</button>
            <p id="parse-status" class="mt-3 text-center text-sm text-gray-600"></p>
            
            <!-- AI 進度條 -->
            <div id="ai-progress-container" class="hidden mt-4">
                <p class="text-sm text-center text-gray-500 mb-1">AI 正在努力解析中...</p>
                <div class="w-full bg-gray-200 rounded-full h-2.5">
                    <div id="ai-progress-bar-inner" class="bg-purple-600 h-2.5 rounded-full" style="width: 0%"></div>
                </div>
            </div>
        </div>
        
        <!-- 單字列表 -->
        <div class="mb-6">
            <h3 class="text-xl font-semibold mb-4 text-gray-700">已儲存單字列表 (<span id="word-count">0</span> 個)</h3>
            <div id="word-list" class="space-y-3">
                <!-- 單字列表將由 JS 渲染 -->
            </div>
        </div>
        
        <!-- 清除所有單字按鈕 -->
        <button id="clear-all-words-btn" class="w-full bg-red-500 text-white p-3 rounded-lg font-semibold hover:bg-red-600 transition-colors">清除所有單字和紀錄</button>
    </div>
    
    <!-- AI 解析確認 Modal (預設隱藏) -->
    <div id="parse-confirm-modal" class="hidden fixed inset-0 bg-gray-900 bg-opacity-75 flex items-center justify-center z-50 p-4">
        <div class="bg-white p-8 rounded-2xl shadow-xl w-full max-w-3xl max-h-[90vh] overflow-y-auto">
            <h3 class="text-2xl font-bold mb-4 text-gray-800">AI 解析結果確認</h3>
            <p class="text-gray-600 mb-4">請檢查以下單字列表,取消勾選不需要新增的項目。</p>
            
            <div class="flex items-center mb-4">
                <input type="checkbox" id="select-all-checkbox" class="h-5 w-5 rounded text-indigo-600 focus:ring-indigo-500 border-gray-300">
                <label for="select-all-checkbox" class="ml-2 font-semibold text-gray-700">全選/全不選</label>
            </div>
            
            <div id="parse-results-container" class="space-y-3 mb-6">
                <!-- AI 解析結果將由 JS 渲染 -->
            </div>
            
            <div class="flex justify-end gap-4 mt-6">
                <button type="button" id="cancel-parse-btn" class="px-6 py-2 bg-gray-200 text-gray-800 rounded-lg hover:bg-gray-300 transition-colors">取消並放棄</button>
                <button type="button" id="confirm-parse-btn" class="px-6 py-2 bg-green-600 text-white rounded-lg hover:bg-green-700 transition-colors">確認新增所選單字</button>
            </div>
        </div>
    </div>

    <!-- 學習介面 (預設隱藏) -->
    <div id="learning-view" class="hidden w-full max-w-2xl">
        
        <!-- 極速挑戰 HUD -->
        <div id="speed-hud" class="hidden fixed top-0 left-0 right-0 bg-white shadow-lg p-4 z-10 flex justify-between items-center">
            <div class="text-xl font-bold text-gray-800">分數: <span id="speed-score">0</span></div>
            <div class="text-2xl font-extrabold text-red-600">時間: <span id="speed-timer">60</span>s</div>
        </div>
        <div id="hud-placeholder" class="h-16 hidden"></div> <!-- 佔位符 -->
        
        <!-- 進度條 -->
        <div id="progress-bar-container" class="w-full mb-6">
            <div class="flex justify-between items-center mb-2">
                <span id="progress-text" class="text-lg font-semibold text-gray-700">進度: 0/0</span>
                <span id="mistake-count" class="text-lg font-semibold text-red-500">錯誤: 0</span>
            </div>
            <div class="w-full bg-gray-200 rounded-full h-3">
                <div id="progress-bar" class="bg-indigo-500 h-3 rounded-full transition-all duration-300" style="width: 0%"></div>
            </div>
        </div>
        
        <!-- 閃卡區塊 -->
        <div id="flashcard-container" class="flip-container w-full h-96 mb-6">
            <div class="flipper w-full h-full">
                <!-- 正面 (中文) -->
                <div id="card-front" class="front text-4xl font-bold bg-indigo-500 text-white">
                    <span id="card-zh">中文翻譯</span>
                </div>
                <!-- 背面 (英文) -->
                <div id="card-back" class="back text-4xl font-bold bg-violet-400 text-white">
                    <span id="card-en">English Word</span>
                </div>
            </div>
        </div>
        
        <!-- 測驗區塊 -->
        <div id="quiz-container" class="w-full max-w-md mx-auto">
            <div id="quiz-completion-message" class="hidden text-center p-8 bg-green-100 rounded-xl shadow-lg">
                <p class="text-3xl font-bold text-green-700 mb-4">測驗完成!🎉</p>
                <p id="quiz-summary" class="text-xl text-gray-700"></p>
            </div>
            
            <!-- 題目顯示 -->
            <div id="question-display" class="text-center mb-6 p-4 bg-white rounded-xl shadow-md">
                <p id="question-text" class="text-2xl font-semibold text-gray-800">題目</p>
                <button id="speak-btn" class="speak-btn mt-2 p-2 bg-indigo-100 text-indigo-600 rounded-full hover:bg-indigo-200 transition-colors disabled:opacity-50 disabled:cursor-not-allowed">
                    <svg xmlns="http://www.w3.org/2000/svg" class="h-6 w-6" fill="none" viewBox="0 0 24 24" stroke="currentColor"><path stroke-linecap="round" stroke-linejoin="round" stroke-width="2" d="M15.536 8.464a5 5 0 010 7.072m2.828-9.9a9 9 0 010 12.728M5.586 15H4a1 1 0 01-1-1V9a1 1 0 011-1h1.586l4.707-4.707A1 1 0 0112 3v18a1 1 0 01-1.707.707L5.586 15z" /></svg>
                </button>
            </div>
            
            <!-- 答案輸入區塊 -->
            <div class="flex flex-col gap-4">
                <!-- 【修改】答案輸入框,移除 type="text" 以便手寫辨識 API 介入 -->
                <input id="answer-input" placeholder="輸入你的答案 (按 Enter 提交)" class="w-full p-4 border-2 border-gray-300 rounded-xl text-2xl focus:border-indigo-500 focus:ring-indigo-500 transition-colors" autocomplete="off">
                
                <button id="submit-answer-btn" class="w-full bg-indigo-500 text-white p-4 rounded-xl text-xl font-bold hover:bg-indigo-600 transition-colors">提交答案</button>
                
                <button id="hint-btn" class="w-full bg-yellow-500 text-white p-3 rounded-xl text-lg font-bold hover:bg-yellow-600 transition-colors hidden">顯示提示</button>
            </div>
        </div>
        
        <!-- 複習模式導航 -->
        <div id="review-nav-container" class="hidden w-full max-w-md mx-auto mt-6 flex justify-between gap-4">
            <button id="prev-card-btn" class="flex-1 bg-gray-500 text-white p-3 rounded-xl text-lg font-bold hover:bg-gray-600 transition-colors">上一張</button>
            <button id="flip-card-btn" class="flex-1 bg-indigo-500 text-white p-3 rounded-xl text-lg font-bold hover:bg-indigo-600 transition-colors">翻轉</button>
            <button id="next-card-btn" class="flex-1 bg-green-500 text-white p-3 rounded-xl text-lg font-bold hover:bg-green-600 transition-colors">下一張</button>
        </div>
        
        <!-- 返回主選單 -->
        <button id="back-to-menu-btn" class="mt-8 px-6 py-3 bg-gray-200 text-gray-800 rounded-full font-semibold hover:bg-gray-300 transition-colors">返回主選單</button>
    </div>

    <!-- 成績報告介面 (預設隱藏) -->
    <div id="grade-report-view" class="hidden w-full max-w-4xl bg-white p-6 rounded-3xl shadow-2xl">
        <div class="flex justify-between items-center mb-6">
            <h2 class="text-3xl font-bold text-gray-800">成績報告</h2>
            <button id="back-to-modes-from-report-btn" class="bg-gray-200 text-gray-800 p-3 rounded-full hover:bg-gray-300 transition-colors">
                 <svg xmlns="http://www.w3.org/2000/svg" class="h-6 w-6" fill="none" viewBox="0 0 24 24" stroke="currentColor"><path stroke-linecap="round" stroke-linejoin="round" stroke-width="2" d="M6 18L18 6M6 6l12 12" /></svg>
            </button>
        </div>
        
        <div class="grid grid-cols-1 md:grid-cols-3 gap-6">
            <!-- Report for zh-en -->
            <div class="p-4 bg-teal-50 rounded-lg border border-teal-200">
                <h4 class="text-xl font-bold text-teal-800 mb-4">中翻英測驗</h4>
                <div id="report-zh-en" class="space-y-3 text-left text-gray-700 max-h-80 overflow-y-auto pr-2">
                    <!-- Content will be generated by JS -->
                </div>
            </div>
            <!-- Report for en-zh -->
            <div class="p-4 bg-amber-50 rounded-lg border border-amber-200">
                <h4 class="text-xl font-bold text-amber-800 mb-4">英翻中測驗</h4>
                <div id="report-en-zh" class="space-y-3 text-left text-gray-700 max-h-80 overflow-y-auto pr-2">
                    <!-- Content will be generated by JS -->
                </div>
            </div>
            <!-- Report for listen -->
            <div class="p-4 bg-rose-50 rounded-lg border border-rose-200">
                <h4 class="text-xl font-bold text-rose-800 mb-4">聽力測驗</h4>
                <div id="report-listen" class="space-y-3 text-left text-gray-700 max-h-80 overflow-y-auto pr-2">
                    <!-- Content will be generated by JS -->
                </div>
            </div>
        </div>
    </div>

    <!-- 清除確認 Modal -->
    <div id="confirm-clear-modal" class="hidden fixed inset-0 bg-gray-900 bg-opacity-75 flex items-center justify-center z-50 p-4">
        <div class="bg-white p-8 rounded-2xl shadow-xl w-full max-w-sm">
            <h3 class="text-2xl font-bold mb-4 text-gray-800">確認操作</h3>
            <p class="text-gray-600 mb-6">您確定要清除所有單字和成績紀錄嗎?此操作無法復原。</p>
            <div class="flex justify-end gap-4 mt-6">
                <button type="button" id="cancel-clear-btn" class="px-6 py-2 bg-gray-200 text-gray-800 rounded-lg hover:bg-gray-300 transition-colors">取消</button>
                <button type="button" id="confirm-clear-btn" class="px-6 py-2 bg-red-600 text-white rounded-lg hover:bg-red-700 transition-colors">確認清除</button>
            </div>
        </div>
    </div>
    
    <!-- 單字刪除確認 Modal -->
    <div id="confirm-delete-modal" class="hidden fixed inset-0 bg-gray-900 bg-opacity-75 flex items-center justify-center z-50 p-4">
        <div class="bg-white p-8 rounded-2xl shadow-xl w-full max-w-sm">
            <h3 class="text-2xl font-bold mb-4 text-gray-800">確認刪除</h3>
            <p class="text-gray-600 mb-6">您確定要刪除單字 "<span id="word-to-delete" class="font-bold"></span>" 嗎?此操作無法復原。</p>
            <div class="flex justify-end gap-4 mt-6">
                <button type="button" id="cancel-delete-btn" class="px-6 py-2 bg-gray-200 text-gray-800 rounded-lg hover:bg-gray-300 transition-colors">取消</button>
                <button type="button" id="confirm-delete-btn" class="px-6 py-2 bg-red-600 text-white rounded-lg hover:bg-red-700 transition-colors">確認刪除</button>
            </div>
        </div>
    </div>
    
    <!-- 分享 Modal -->
    <div id="share-modal" class="hidden fixed inset-0 bg-gray-900 bg-opacity-75 flex items-center justify-center z-50 p-4">
        <div class="bg-white p-8 rounded-2xl shadow-xl w-full max-w-md">
            <h3 class="text-2xl font-bold mb-4 text-gray-800">分享您的單字本</h3>
            <p class="text-gray-600 mb-6">將以下連結或 QR Code 分享給您的學生。</p>
            
            <div id="qrcode-container" class="mb-6 p-4 bg-gray-100 rounded-lg">
                <!-- QR Code 將由 JS 渲染 -->
            </div>
            
            <div class="flex items-center border border-gray-300 rounded-lg p-3 mb-6 bg-gray-50">
                <input type="text" id="share-link-input" readonly class="flex-1 bg-transparent text-gray-700 truncate">
                <button id="copy-link-btn" class="ml-3 bg-indigo-500 text-white p-2 rounded-lg text-sm font-semibold hover:bg-indigo-600 transition-colors">複製連結</button>
            </div>
            
            <div class="flex justify-end">
                <button type="button" id="close-share-modal-btn" class="px-6 py-2 bg-gray-200 text-gray-800 rounded-lg hover:bg-gray-300 transition-colors">關閉</button>
            </div>
        </div>
    </div>

    <script>
        // --- 全域變數 ---
        let words = [];
        let quizQueue = [];
        let wordsForCurrentMode = [];
        let currentCardIndex = 0;
        let currentMode = '';
        let quizIncorrectCount = 0;
        let quizStartTime = 0;
        let completionStatus = {}; // { 'zh-en': true, 'en-zh': false, 'listen': true }
        let highScore = 0;
        let gradeReports = {}; // { 'zh-en': [], 'en-zh': [], 'listen': [] }
        let parsedWordsFromAI = [];
        let timerInterval;
        let timeLeft = 60;
        let speedScore = 0;
        let currentSpeedCard = null;
        let currentSpeedQuestionType = '';
        let isMobileDevice = /Mobi|Android/i.test(navigator.userAgent); // 簡易判斷是否為行動裝置
        let versionLock = 'auto'; // 【新增】版本鎖定設定: 'auto', 'pc', 'mobile'
        let effectiveVersion = 'pc'; // 【新增】實際運行的版本: 'pc' (打字) 或 'mobile' (手寫)

        // --- DOM 元素 ---
        const mainMenu = document.getElementById('main-menu');
        const mainTitle = document.getElementById('main-title');
        const wordManagementView = document.getElementById('word-management-view');
        const learningView = document.getElementById('learning-view');
        const flashcardContainer = document.getElementById('flashcard-container');
        const cardZh = document.getElementById('card-zh');
        const cardEn = document.getElementById('card-en');
        const flipCardBtn = document.getElementById('flip-card-btn');
        const prevCardBtn = document.getElementById('prev-card-btn');
        const nextCardBtn = document.getElementById('next-card-btn');
        const reviewNavContainer = document.getElementById('review-nav-container');
        const quizContainer = document.getElementById('quiz-container');
        const questionText = document.getElementById('question-text');
        const answerInput = document.getElementById('answer-input');
        const submitAnswerBtn = document.getElementById('submit-answer-btn');
        const backToMenuBtn = document.getElementById('back-to-menu-btn');
        const progressBar = document.getElementById('progress-bar');
        const progressText = document.getElementById('progress-text');
        const mistakeCount = document.getElementById('mistake-count');
        const progressBarContainer = document.getElementById('progress-bar-container');
        const quizCompletionMessage = document.getElementById('quiz-completion-message');
        const quizSummary = document.getElementById('quiz-summary');
        const speakBtn = document.getElementById('speak-btn');
        const wordList = document.getElementById('word-list');
        const wordCount = document.getElementById('word-count');
        const newEnglish = document.getElementById('new-english');
        const newChinese = document.getElementById('new-chinese');
        const newSentenceEn = document.getElementById('new-sentence-en');
        const newSentenceZh = document.getElementById('new-sentence-zh');
        const newSentenceAnswer = document.getElementById('new-sentence-answer');
        const addWordBtn = document.getElementById('add-word-btn');
        const clearAllWordsBtn = document.getElementById('clear-all-words-btn');
        const confirmClearModal = document.getElementById('confirm-clear-modal');
        const cancelClearBtn = document.getElementById('cancel-clear-btn');
        const confirmClearBtn = document.getElementById('confirm-clear-btn');
        const confirmDeleteModal = document.getElementById('confirm-delete-modal');
        const cancelDeleteBtn = document.getElementById('cancel-delete-btn');
        const confirmDeleteBtn = document.getElementById('confirm-delete-btn');
        const wordToDeleteSpan = document.getElementById('word-to-delete');
        const manageWordsBtn = document.getElementById('manage-words-btn');
        const backToModesFromManageBtn = document.getElementById('back-to-modes-from-manage-btn');
        const titleInput = document.getElementById('title-input');
        const saveTitleBtn = document.getElementById('save-title-btn');
        const highscoreDisplay = document.getElementById('highscore-display');
        const speedHud = document.getElementById('speed-hud');
        const speedScoreDisplay = document.getElementById('speed-score');
        const speedTimerDisplay = document.getElementById('speed-timer');
        const hudPlaceholder = document.getElementById('hud-placeholder');
        const hintBtn = document.getElementById('hint-btn');
        const resetCrownsBtn = document.getElementById('reset-crowns-btn');
        const shareGameBtn = document.getElementById('share-game-btn');
        const shareModal = document.getElementById('share-modal');
        const closeShareModalBtn = document.getElementById('close-share-modal-btn');
        const shareLinkInput = document.getElementById('share-link-input');
        const copyLinkBtn = document.getElementById('copy-link-btn');
        const qrcodeContainer = document.getElementById('qrcode-container');
        const gradeReportBtn = document.getElementById('grade-report-btn');
        const gradeReportView = document.getElementById('grade-report-view');
        const backToModesFromReportBtn = document.getElementById('back-to-modes-from-report-btn');
        const reportZhEn = document.getElementById('report-zh-en');
        const reportEnZh = document.getElementById('report-en-zh');
        const reportListen = document.getElementById('report-listen');
        const startRangeInput = document.getElementById('start-range');
        const endRangeInput = document.getElementById('end-range');
        const randomQuestionsCheckbox = document.getElementById('random-questions-checkbox');
        const randomQuestionsCountInput = document.getElementById('random-questions-count');
        const audioPreloadContainer = document.getElementById('audio-preload-container');
        const audioPreloadBar = document.getElementById('audio-preload-bar');
        const audioPreloadText = document.getElementById('audio-preload-text');
        
        // AI 解析相關
        const apiKeyInput = document.getElementById('api-key-input');
        const saveApiKeyBtn = document.getElementById('save-api-key-btn');
        const pdfUploadInput = document.getElementById('pdf-upload-input');
        const textInput = document.getElementById('text-input');
        const parsePdfBtn = document.getElementById('parse-pdf-btn');
        const parseStatus = document.getElementById('parse-status');
        const aiProgressContainer = document.getElementById('ai-progress-container');
        const aiProgressBarInner = document.getElementById('ai-progress-bar-inner');
        const parseConfirmModal = document.getElementById('parse-confirm-modal');
        const parseResultsContainer = document.getElementById('parse-results-container');
        const selectAllCheckbox = document.getElementById('select-all-checkbox');
        const confirmParseBtn = document.getElementById('confirm-parse-btn');
        const cancelParseBtn = document.getElementById('cancel-parse-btn');
        
        // 【新增】版本鎖定 DOM
        const lockAuto = document.getElementById('lock-auto');
        const lockPc = document.getElementById('lock-pc');
        const lockMobile = document.getElementById('lock-mobile');
        
        // --- 音效 ---
        const correctAudio = new Audio('correct.mp3');
        const wrongAudio = new Audio('wrong.mp3');

        // --- 輔助函式 ---

        // 【新增】初始化版本設定
        function initializeVersion() {
            // 1. 檢查 URL 參數是否有版本鎖定
            const urlParams = new URLSearchParams(window.location.search);
            const urlLock = urlParams.get('version');
            
            if (urlLock === 'pc' || urlLock === 'mobile') {
                versionLock = urlLock;
            } else {
                // 2. 檢查 localStorage 是否有教師設定
                const storedLock = localStorage.getItem('versionLock');
                if (storedLock === 'pc' || storedLock === 'mobile') {
                    versionLock = storedLock;
                }
            }
            
            // 3. 根據鎖定和裝置類型決定實際版本
            if (versionLock === 'pc') {
                effectiveVersion = 'pc';
            } else if (versionLock === 'mobile') {
                effectiveVersion = 'mobile';
            } else {
                // auto 模式
                effectiveVersion = isMobileDevice ? 'mobile' : 'pc';
            }
            
            // 4. 應用版本設定
            applyVersionSettings();
            
            // 5. 更新管理介面的 radio button 狀態
            if (versionLock === 'pc') lockPc.checked = true;
            else if (versionLock === 'mobile') lockMobile.checked = true;
            else lockAuto.checked = true;
        }
        
        // 【新增】應用版本設定
        function applyVersionSettings() {
            if (effectiveVersion === 'mobile') {
                // 行動版:強制手寫辨識
                answerInput.classList.add('handwriting-input');
                answerInput.setAttribute('inputmode', 'none'); // 禁用原生鍵盤
                answerInput.setAttribute('lang', 'en'); // 設置語言為英文
                answerInput.setAttribute('data-ime', 'handwriting'); // 標記為手寫輸入
                // 嘗試啟用 Google Handwriting Input API
                if (window.google && window.google.ime) {
                    window.google.ime.setOptions({
                        ime: 'handwriting',
                        language: 'en',
                        // 確保在行動裝置上點擊輸入框時,手寫板會彈出
                        trigger: answerInput
                    });
                } else {
                    // 如果 API 載入失敗,給予提示
                    answerInput.placeholder = '手寫輸入載入中... (請點擊輸入框)';
                }
            } else {
                // PC 版:標準打字輸入
                answerInput.classList.remove('handwriting-input');
                answerInput.removeAttribute('inputmode');
                answerInput.removeAttribute('lang');
                answerInput.removeAttribute('data-ime');
                answerInput.placeholder = '輸入你的答案 (按 Enter 提交)';
                // 嘗試禁用 Google Handwriting Input API (如果已啟用)
                if (window.google && window.google.ime) {
                    window.google.ime.setOptions({
                        ime: 'none',
                        trigger: null
                    });
                }
            }
            
            // 提示使用者當前版本
            const versionText = effectiveVersion === 'mobile' ? '行動版 (手寫)' : 'PC 版 (打字)';
            console.log(`當前版本: ${versionText} (鎖定設定: ${versionLock})`);
        }
        
        // 【新增】儲存版本鎖定設定
        function saveVersionLock() {
            const selectedLock = document.querySelector('input[name="version-lock"]:checked').value;
            versionLock = selectedLock;
            if (versionLock === 'auto') {
                localStorage.removeItem('versionLock');
            } else {
                localStorage.setItem('versionLock', versionLock);
            }
            // 重新應用設定以更新當前介面
            initializeVersion();
            
            const originalText = saveTitleBtn.textContent;
            saveTitleBtn.textContent = '設定已儲存!';
            setTimeout(() => {
                saveTitleBtn.textContent = originalText;
            }, 1500);
        }
        
        // 【新增】版本鎖定事件監聽
        document.querySelectorAll('input[name="version-lock"]').forEach(radio => {
            radio.addEventListener('change', saveVersionLock);
        });
        
        // 確保在頁面載入後初始化版本設定
        window.addEventListener('load', initializeVersion);
        
        // 由於 Google Handwriting Input API 是異步載入,我們需要一個回調函數
        window.googleImeLoaded = function() {
            console.log('Google Handwriting Input API 載入完成。');
            // 重新應用設定以確保手寫功能正確啟用
            applyVersionSettings();
        };
        
        // 檢查 Google Handwriting Input API 是否已載入
        if (window.google && window.google.ime) {
            window.googleImeLoaded();
        } else {
            // 監聽 API 載入事件 (如果 API 支援)
            // 由於我們是使用 <script async> 載入,這裡可能需要一個更可靠的監聽機制
            // 暫時依賴 window.googleImeLoaded 函數,並在 applyVersionSettings 中處理未載入的情況
        }

        function shuffleArray(array) {
            for (let i = array.length - 1; i > 0; i--) {
                const j = Math.floor(Math.random() * (i + 1));
                [array[i], array[j]] = [array[j], array[i]];
            }
            return array;
        }

        function showView(viewId) {
            [mainMenu, wordManagementView, learningView, gradeReportView].forEach(view => {
                view.classList.add('hidden');
            });
            document.getElementById(viewId).classList.remove('hidden');
            
            // 確保在切換到學習介面時,版本設定被正確應用
            if (viewId === 'learning-view') {
                applyVersionSettings();
            }
        }

        function saveWordsToStorage() {
            localStorage.setItem('flashcardsWords', JSON.stringify(words));
            localStorage.setItem('flashcardsReports', JSON.stringify(gradeReports));
            localStorage.setItem('flashcardsTitle', mainTitle.textContent);
            localStorage.setItem('flashcardsHighScore', highScore);
            localStorage.setItem('completionStatus', JSON.stringify(completionStatus));
        }

        function loadWordsFromStorage() {
            const storedWords = localStorage.getItem('flashcardsWords');
            if (storedWords) {
                words = JSON.parse(storedWords);
            }
            const storedReports = localStorage.getItem('flashcardsReports');
            if (storedReports) {
                gradeReports = JSON.parse(storedReports);
            }
            const storedTitle = localStorage.getItem('flashcardsTitle');
            if (storedTitle) {
                mainTitle.textContent = storedTitle;
                titleInput.value = storedTitle;
            } else {
                mainTitle.textContent = '單字閃卡';
                titleInput.value = '單字閃卡';
            }
            const storedHighScore = localStorage.getItem('flashcardsHighScore');
            if (storedHighScore) {
                highScore = parseInt(storedHighScore, 10);
                highscoreDisplay.textContent = highScore;
            }
            const storedCompletion = localStorage.getItem('completionStatus');
            if (storedCompletion) {
                completionStatus = JSON.parse(storedCompletion);
            }
            
            // 【新增】載入版本鎖定設定
            const storedLock = localStorage.getItem('versionLock');
            if (storedLock === 'pc' || storedLock === 'mobile') {
                versionLock = storedLock;
            } else {
                versionLock = 'auto';
            }
            
            // 處理 URL 參數中的單字資料
            const urlParams = new URLSearchParams(window.location.search);
            const encodedData = urlParams.get('data');
            const urlTitle = urlParams.get('title');
            
            if (encodedData) {
                try {
                    const compressed = atob(encodedData);
                    const decompressed = pako.inflate(compressed.split('').map(c => c.charCodeAt(0)), { to: 'string' });
                    const urlWords = JSON.parse(decompressed);
                    
                    if (urlWords.length > 0) {
                        // 僅在本地沒有單字時才載入 URL 中的單字
                        if (words.length === 0) {
                            words = urlWords;
                            saveWordsToStorage(); // 儲存從 URL 載入的單字
                        }
                        if (urlTitle) {
                            mainTitle.textContent = decodeURIComponent(urlTitle);
                            titleInput.value = decodeURIComponent(urlTitle);
                            localStorage.setItem('flashcardsTitle', mainTitle.textContent);
                        }
                    }
                } catch (e) {
                    console.error("解碼 URL 資料失敗:", e);
                }
            }
            
            renderWordList();
            updateCompletionUI();
            preloadAudioFiles();
        }

        function updateCompletionUI() {
            document.querySelectorAll('.mode-btn').forEach(btn => {
                const mode = btn.dataset.mode;
                const crown = btn.querySelector('.crown-icon');
                if (crown) {
                    if (completionStatus[mode]) {
                        crown.classList.remove('hidden');
                    } else {
                        crown.classList.add('hidden');
                    }
                }
            });
        }

        function renderWordList() {
            wordList.innerHTML = '';
            wordCount.textContent = words.length;
            
            words.forEach((word, index) => {
                const item = document.createElement('div');
                item.className = 'list-item p-4 bg-white rounded-xl shadow-md flex justify-between items-center transition-all duration-300';
                item.innerHTML = `
                    <div class="flex-1 mr-4">
                        <p class="text-lg font-bold text-gray-800">${index + 1}. ${word.english}</p>
                        <p class="text-gray-600">${word.chinese}</p>
                        ${word.sentence ? `<p class="text-sm text-blue-500 mt-1">例句: ${word.sentence.en.replace('___', `(${word.sentence.answer})`)}</p>` : ''}
                        <p class="text-xs text-gray-400 mt-1">熟練度: ${word.proficiency} | 錯: ${word.incorrectCount}</p>
                    </div>
                    <button data-index="${index}" class="delete-word-btn bg-red-500 text-white p-2 rounded-full hover:bg-red-600 transition-colors flex-shrink-0">
                        <svg xmlns="http://www.w3.org/2000/svg" class="h-5 w-5" fill="none" viewBox="0 0 24 24" stroke="currentColor"><path stroke-linecap="round" stroke-linejoin="round" stroke-width="2" d="M19 7l-.867 12.142A2 2 0 0116.138 21H7.862a2 2 0 01-1.995-1.858L5 7m5 4v6m4-6v6m1-10V4a1 1 0 00-1-1h-4a1 1 0 00-1 1v3M4 7h16" /></svg>
                    </button>
                `;
                wordList.appendChild(item);
            });
            
            document.querySelectorAll('.delete-word-btn').forEach(btn => {
                btn.addEventListener('click', (e) => {
                    const index = parseInt(e.currentTarget.dataset.index, 10);
                    showDeleteConfirmation(index);
                });
            });
        }

        function showDeleteConfirmation(index) {
            const word = words[index];
            wordToDeleteSpan.textContent = `${word.english} (${word.chinese})`;
            confirmDeleteModal.classList.remove('hidden');
            
            confirmDeleteBtn.onclick = () => {
                // 執行刪除動畫
                const itemToRemove = wordList.children[index];
                itemToRemove.classList.add('removing');
                
                setTimeout(() => {
                    words.splice(index, 1);
                    saveWordsToStorage();
                    renderWordList();
                    confirmDeleteModal.classList.add('hidden');
                    preloadAudioFiles(); // 刪除後重新預載音檔
                }, 300);
            };
            
            cancelDeleteBtn.onclick = () => {
                confirmDeleteModal.classList.add('hidden');
            };
        }

        function updateProgressBar() {
            const total = wordsForCurrentMode.length;
            const remaining = quizQueue.length;
            const completed = total - remaining;
            const percentage = total > 0 ? (completed / total) * 100 : 0;
            
            progressBar.style.width = `${percentage}%`;
            progressText.textContent = `進度: ${completed}/${total}`;
            mistakeCount.textContent = `錯誤: ${quizIncorrectCount}`;
        }

        function updateHintButtonVisibility() {
            const isQuiz = !['review', 'speed', ''].includes(currentMode);
            const isCloze = currentMode === 'sentence-cloze';
            
            if (isQuiz && !isCloze) {
                hintBtn.classList.remove('hidden');
            } else {
                hintBtn.classList.add('hidden');
            }
        }

        function displayCard() {
            answerInput.value = '';
            answerInput.focus();
            
            const isReview = currentMode === 'review';
            const isSpeed = currentMode === 'speed';
            
            let card;
            if (isReview) {
                card = wordsForCurrentMode[currentCardIndex];
                reviewNavContainer.classList.remove('hidden');
                quizContainer.classList.add('hidden');
                flashcardContainer.classList.remove('flipped');
                
                prevCardBtn.disabled = currentCardIndex === 0;
                nextCardBtn.disabled = currentCardIndex === wordsForCurrentMode.length - 1;
                
                cardZh.textContent = card.chinese;
                cardEn.textContent = card.english;
                
                // 複習模式不顯示問題區塊
                questionText.textContent = '';
                speakBtn.classList.add('hidden');
                
            } else if (isSpeed) {
                // 極速挑戰模式
                card = currentSpeedCard;
                reviewNavContainer.classList.add('hidden');
                quizContainer.classList.remove('hidden');
                flashcardContainer.classList.add('hidden');
                
                // 隨機決定題目類型
                const questionTypes = ['zh-en', 'en-zh', 'listen'];
                currentSpeedQuestionType = questionTypes[Math.floor(Math.random() * questionTypes.length)];
                
                let question;
                let isListen = false;
                
                switch (currentSpeedQuestionType) {
                    case 'zh-en':
                        question = `中翻英: ${card.chinese}`;
                        break;
                    case 'en-zh':
                        question = `英翻中: ${card.english}`;
                        break;
                    case 'listen':
                        question = `聽力測驗 (請聽音檔)`;
                        isListen = true;
                        break;
                }
                
                questionText.textContent = question;
                speakBtn.classList.toggle('hidden', !isListen);
                if (isListen) {
                    speakWord(card.english);
                }
                
            } else {
                // 測驗模式
                card = quizQueue[0];
                reviewNavContainer.classList.add('hidden');
                quizContainer.classList.remove('hidden');
                flashcardContainer.classList.add('hidden');
                
                let question;
                let isListen = false;
                
                switch (currentMode) {
                    case 'zh-en':
                    case 'hard':
                        question = `中翻英: ${card.chinese}`;
                        break;
                    case 'en-zh':
                        question = `英翻中: ${card.english}`;
                        break;
                    case 'listen':
                        question = `聽力測驗 (請聽音檔)`;
                        isListen = true;
                        break;
                    case 'sentence-cloze':
                        question = `克漏字: ${card.sentence.en.replace('___', ' (___) ')} (${card.sentence.zh})`;
                        break;
                }
                
                questionText.textContent = question;
                speakBtn.classList.toggle('hidden', !isListen);
                if (isListen) {
                    speakWord(card.english);
                }
                
                updateProgressBar();
            }
            
            // 確保在顯示新卡片時,版本設定被正確應用
            applyVersionSettings();
        }

        function setupLearningView(mode) {
            if (words.length === 0) {
                alert("請先新增單字!");
                return;
            }
            
            currentMode = mode;
            quizCompletionMessage.classList.add('hidden');
            
            // 確保輸入框在開始測驗前是可用的
            answerInput.disabled = false;
            submitAnswerBtn.disabled = false;

            const isReview = mode === 'review';
            const isSpeed = mode === 'speed';
            const isQuiz = !isReview && !isSpeed;

            quizContainer.classList.remove('hidden');
            reviewNavContainer.classList.toggle('hidden', !isReview);
            progressBarContainer.classList.toggle('hidden', isReview || isSpeed);
            speedHud.classList.toggle('hidden', !isSpeed);
            hudPlaceholder.classList.toggle('hidden', isSpeed);
            quizCompletionMessage.classList.add('hidden');
            
            const start = parseInt(startRangeInput.value, 10);
            const end = parseInt(endRangeInput.value, 10);
            
            let wordPool;
            if (!isNaN(start) && !isNaN(end) && start > 0 && end >= start && end <= words.length) {
                wordPool = words.slice(start - 1, end);
            } else {
                wordPool = [...words];
            }
            
            // 【修改】過濾克漏字模式的單字,必須包含 sentence 和 answer
            if (mode === 'sentence-cloze') {
                wordsForCurrentMode = wordPool.filter(w => w.sentence && w.sentence.en && w.sentence.zh && w.sentence.answer);
                if (wordsForCurrentMode.length === 0) {
                    alert("題庫中沒有附帶完整例句(包含克漏字答案)的單字可供此模式使用。");
                    return;
                }
            } else if (mode === 'review') {
                wordsForCurrentMode = wordPool;
            } else if (randomQuestionsCheckbox.checked) {
                const randomCount = parseInt(randomQuestionsCountInput.value, 10);
                if (!isNaN(randomCount) && randomCount > 0 && randomCount <= wordPool.length) {
                    wordsForCurrentMode = shuffleArray([...wordPool]).slice(0, randomCount);
                } else {
                    alert('請輸入有效的隨機題數。題數不能為零或超過所選範圍的單字總數。');
                    return;
                }
            } else {
                wordsForCurrentMode = wordPool;
            }

            if (wordsForCurrentMode.length === 0) {
                alert("選定的範圍內沒有單字,請重新選擇或新增。");
                return;
            }

            if (mode === 'hard') {
                const hardWords = words.filter(w => w.incorrectCount > 0)
                    .sort((a, b) => b.incorrectCount - a.incorrectCount).slice(0, 10);
                if (hardWords.length === 0) {
                    alert('太棒了!目前沒有需要特別複習的困難單字。'); return;
                }
                wordsForCurrentMode = hardWords; 
                quizQueue = shuffleArray([...wordsForCurrentMode]);
            } else if (isQuiz) {
                quizQueue = shuffleArray([...wordsForCurrentMode]);
            }

            if (isQuiz) {
                quizStartTime = Date.now();
            }

            quizIncorrectCount = 0;
            updateHintButtonVisibility();
            
            if (isSpeed) startSpeedChallenge(wordsForCurrentMode);
            else { currentCardIndex = 0; displayCard(); }
            
            showView('learning-view');
        }

        const checkAnswer = () => {
            const userAnswer = answerInput.value.trim();
            if (!userAnswer) return;

            const isSpeed = currentMode === 'speed';
            const isReview = currentMode === 'review';
            
            if (isSpeed && timeLeft <= 0) return;

            const card = isReview ? wordsForCurrentMode[currentCardIndex] : (isSpeed ? currentSpeedCard : quizQueue[0]);
            if (!card) return;

            const wordIndex = words.findIndex(w => w.english === card.english && w.chinese === card.chinese);
            
            let correctAnswer, answerLang;
            
            if (isReview) {
                const isFlipped = flashcardContainer.classList.contains('flipped');
                let rawAnswer = isFlipped ? card.english : card.chinese;
                correctAnswer = rawAnswer.replace(/[\((\[【].*?[\))\]】]/g, "").trim();
                answerLang = isFlipped ? 'en' : 'zh';
            } else {
                let effectiveMode = isSpeed ? currentSpeedQuestionType : (currentMode === 'hard' ? 'zh-en' : currentMode);
                let rawAnswer;
                switch (effectiveMode) {
                    // 【修改】此處是核心邏輯修改
                    case 'sentence-cloze':
                        // 直接使用 sentence.answer 作為正確答案
                        rawAnswer = card.sentence.answer;
                        answerLang = 'en';
                        break;
                    case 'zh-en': case 'listen':
                        rawAnswer = card.english;
                        answerLang = 'en';
                        break;
                    case 'en-zh':
                        rawAnswer = card.chinese;
                        answerLang = 'zh';
                        break;
                }
                // 如果 rawAnswer 存在才進行處理
                if (rawAnswer) {
                    correctAnswer = rawAnswer.replace(/[\((\[【].*?[\))\]】]/g, "").trim();
                } else {
                    // 預防性程式碼,如果找不到答案就判定為錯
                    correctAnswer = `__NO_ANSWER_DEFINED__${Date.now()}`;
                }
            }

            let isCorrect;
            if (answerLang === 'en') {
                const normalize = (str) => {
                    return str.toLowerCase()
                              .replace(/\s*\.{3}\s*/g, '') // 處理 '...',移除點及周圍空格
                              .replace(/[.,/#!$%^&*;:{}=\-_`~()]/g, "") // 移除標點符號
                              .replace(/\s+/g, ''); // 移除所有空格
                };
                isCorrect = normalize(userAnswer) === normalize(correctAnswer);
            } else if (answerLang === 'zh') {
                const possibleAnswers = correctAnswer.split(/[;;]/).map(a => a.trim()).filter(a => a); 
                isCorrect = possibleAnswers.some(ans => ans === userAnswer);
            } else {
                isCorrect = userAnswer === correctAnswer;
            }

            if (isCorrect) {
                correctAudio.play();
                answerInput.classList.remove('border-red-500');
                answerInput.classList.add('border-green-500');
                
                if (!isReview) {
                    // 更新熟練度
                    if (wordIndex !== -1) {
                        words[wordIndex].proficiency = (words[wordIndex].proficiency || 0) + 1;
                        words[wordIndex].incorrectCount = Math.max(0, (words[wordIndex].incorrectCount || 0) - 1);
                    }
                    
                    if (isSpeed) {
                        speedScore++;
                        speedScoreDisplay.textContent = speedScore;
                        startNextSpeedCard();
                    } else {
                        quizQueue.shift();
                        if (quizQueue.length === 0) {
                            endQuiz();
                        } else {
                            displayCard();
                        }
                    }
                }
            } else {
                wrongAudio.play();
                answerInput.classList.remove('border-green-500');
                answerInput.classList.add('border-red-500');
                
                // 晃動效果
                quizContainer.classList.add('shake');
                setTimeout(() => quizContainer.classList.remove('shake'), 820);
                
                if (!isReview) {
                    quizIncorrectCount++;
                    
                    // 更新錯誤次數
                    if (wordIndex !== -1) {
                        words[wordIndex].incorrectCount = (words[wordIndex].incorrectCount || 0) + 1;
                    }
                    
                    if (isSpeed) {
                        // 極速挑戰答錯不扣分,但會換下一題
                        startNextSpeedCard();
                    } else {
                        // 測驗模式答錯,將題目移到隊列尾部
                        const failedCard = quizQueue.shift();
                        quizQueue.push(failedCard);
                        displayCard();
                    }
                }
            }
            
            // 清空輸入框
            answerInput.value = '';
            answerInput.focus();
            
            if (wordIndex !== -1) {
                saveWordsToStorage();
            }
        };

        function endQuiz() {
            const total = wordsForCurrentMode.length;
            const mistakes = quizIncorrectCount;
            const elapsedTime = Math.round((Date.now() - quizStartTime) / 1000);
            
            answerInput.disabled = true;
            submitAnswerBtn.disabled = true;
            
            quizSummary.innerHTML = `
                <p>總題數: ${total}</p>
                <p>錯誤次數: <span class="font-bold text-red-500">${mistakes}</span></p>
                <p>花費時間: ${elapsedTime} 秒</p>
            `;
            quizCompletionMessage.classList.remove('hidden');
            
            // 儲存報告
            const reportData = {
                total: total,
                attempted: total,
                mistakes: mistakes,
                time: elapsedTime,
                date: new Date().toISOString(),
                status: 'completed'
            };
            const history = gradeReports[currentMode] || [];
            history.push(reportData);
            gradeReports[currentMode] = history;
            saveWordsToStorage();
            
            // 檢查是否完成
            if (mistakes === 0) {
                completionStatus[currentMode] = true;
                updateCompletionUI();
                confetti({
                    particleCount: 100,
                    spread: 70,
                    origin: { y: 0.6 }
                });
            }
        }

        function startSpeedChallenge(pool) {
            speedScore = 0;
            timeLeft = 60;
            speedScoreDisplay.textContent = speedScore;
            speedTimerDisplay.textContent = timeLeft;
            
            // 隨機選取第一張卡片
            currentSpeedCard = pool[Math.floor(Math.random() * pool.length)];
            displayCard();
            
            // 啟動計時器
            clearInterval(timerInterval);
            timerInterval = setInterval(() => {
                timeLeft--;
                speedTimerDisplay.textContent = timeLeft;
                
                if (timeLeft <= 10) {
                    speedTimerDisplay.classList.add('timer-highlight');
                } else {
                    speedTimerDisplay.classList.remove('timer-highlight');
                }
                
                if (timeLeft <= 0) {
                    clearInterval(timerInterval);
                    endSpeedChallenge();
                }
            }, 1000);
        }

        function startNextSpeedCard() {
            // 隨機選取下一張卡片
            currentSpeedCard = wordsForCurrentMode[Math.floor(Math.random() * wordsForCurrentMode.length)];
            displayCard();
        }

        function endSpeedChallenge() {
            answerInput.disabled = true;
            submitAnswerBtn.disabled = true;
            
            if (speedScore > highScore) {
                highScore = speedScore;
                localStorage.setItem('flashcardsHighScore', highScore);
                highscoreDisplay.textContent = highScore;
                
                confetti({
                    particleCount: 150,
                    spread: 100,
                    origin: { y: 0.6 }
                });
            }
            
            quizSummary.innerHTML = `
                <p>最終得分: <span class="text-3xl font-bold text-amber-500">${speedScore}</span></p>
                <p class="mt-2">歷史最高分: ${highScore}</p>
            `;
            quizCompletionMessage.classList.remove('hidden');
            
            // 儲存報告
            const reportData = {
                total: wordsForCurrentMode.length, // 這裡 total 意義不大,用 pool size
                attempted: speedScore, // 答對題數
                mistakes: 0, // 極速挑戰不計入錯誤
                time: 60,
                score: speedScore,
                date: new Date().toISOString(),
                status: 'completed'
            };
            const history = gradeReports[currentMode] || [];
            history.push(reportData);
            gradeReports[currentMode] = history;
            saveWordsToStorage();
        }

        function speakWord(word) {
            if ('speechSynthesis' in window) {
                const utterance = new SpeechSynthesisUtterance(word);
                utterance.lang = 'en-US';
                utterance.rate = 0.8; // 稍微慢一點
                
                speakBtn.disabled = true;
                utterance.onend = () => {
                    speakBtn.disabled = false;
                };
                utterance.onerror = () => {
                    speakBtn.disabled = false;
                };
                
                window.speechSynthesis.speak(utterance);
            } else {
                alert("您的瀏覽器不支援語音合成。");
            }
        }
        
        // --- PDF/AI 解析相關函式 ---
        
        function updateAIProgressBar(percentage) {
            aiProgressBarInner.style.width = `${percentage}%`;
        }
        
        function loadApiKey() {
            const storedKey = localStorage.getItem('geminiApiKey');
            if (storedKey) {
                apiKeyInput.value = storedKey;
            }
        }
        
        function saveApiKey() {
            const key = apiKeyInput.value.trim();
            if (key) {
                localStorage.setItem('geminiApiKey', key);
                alert('API Key 已儲存!');
            } else {
                localStorage.removeItem('geminiApiKey');
                alert('API Key 已清除!');
            }
        }
        
        async function callGeminiToParseText(text) {
            const apiKey = apiKeyInput.value.trim();
            if (!apiKey) {
                parseStatus.textContent = '錯誤:請先輸入您的 Gemini API 金鑰並儲存。';
                parsePdfBtn.disabled = false;
                aiProgressContainer.classList.add('hidden');
                return;
            }
            const apiUrl = `https://generativelanguage.googleapis.com/v1beta/models/gemini-2.5-flash-preview-05-20:generateContent?key=${apiKey}`;
            
            const prompt = `
                請分析以下從英文單字學習講義擷取的文字。你的任務是辨識出每一個單字條目,並為每個條目提取以下資訊:
                1.  "english": 完整的英文單字,包含詞性標註,例如 "yesterday (adv.)" 或 "study (v.)"。
                2.  "chinese": 對應的中文翻譯。
                3.  "sentence": 一個包含例句的物件。這個物件應該有以下三個屬性:
                    - "en": 英文例句。請將該條目的主要英文單字(不含詞性)替換成 "___"。
                    - "zh": 完整的中文例句翻譯。
                    - "answer": 在 "en" 屬性的 "___" 空格中,文法正確的答案。例如,如果單字是 "watch",例句是 "He ___ TV.",那 "answer" 就應該是 "watches"。
                
                規則:
                - 如果一個單字條目有多個例句,請只選擇第一個或最能代表該單字用法的例句。
                - 如果同一個單字因為詞性不同而有多個條目(例如 "study (v.)" 和 "study (n.)"),請將它們視為獨立的條目,並各自尋找一個代表性的例句。
                - 如果一個單字條目沒有提供例句,則省略 "sentence" 物件。

                請將所有解析出的單字條目,以一個 JSON 陣列的格式回傳。每一個陣列中的物件都應該符合上述的結構。

                這是你要分析的文字內容:
                ---
                ${text}
                ---
            `;

            const payload = {
                contents: [{ parts: [{ text: prompt }] }],
                generationConfig: {
                    responseMimeType: "application/json",
                    responseSchema: {
                        type: "ARRAY",
                        items: {
                            type: "OBJECT",
                            properties: {
                                english: { type: "STRING" },
                                chinese: { type: "STRING" },
                                sentence: {
                                    type: "OBJECT",
                                    properties: {
                                        en: { type: "STRING" },
                                        zh: { type: "STRING" },
                                        answer: { type: "STRING" } // 新增 answer 欄位
                                    }
                                }
                            }
                        }
                    }
                }
            };

            try {
                const response = await fetch(apiUrl, {
                    method: 'POST',
                    headers: { 'Content-Type': 'application/json' },
                    body: JSON.stringify(payload)
                });

                if (!response.ok) {
                     const errorBody = await response.json();
                    console.error('API Error:', errorBody);
                    throw new Error(`API 請求失敗,狀態碼:${response.status}. 錯誤訊息: ${errorBody.error.message}`);
                }
                const result = await response.json();
                
                if (result.candidates && result.candidates.length > 0 && result.candidates[0].content?.parts?.[0]?.text) {
                    const jsonText = result.candidates[0].content.parts[0].text;
                    parsedWordsFromAI = JSON.parse(jsonText);
                    
                    updateAIProgressBar(100);
                    parseStatus.textContent = 'AI 分析完成!請確認結果。';
                    showParseConfirmation(parsedWordsFromAI);
                    setTimeout(() => {
                        aiProgressContainer.classList.add('hidden');
                        parseStatus.textContent = ''; 
                    }, 2000);
                } else {
                    throw new Error("從 AI 收到無效的回應格式。");
                }
            } catch (error) {
                console.error('AI 解析失敗:', error);
                parseStatus.textContent = `AI 解析失敗: ${error.message}`;
                aiProgressContainer.classList.add('hidden');
            } finally {
                parsePdfBtn.disabled = false;
            }
        }
        
        function showParseConfirmation(parsedWords) {
            parseResultsContainer.innerHTML = '';
            selectAllCheckbox.checked = true;

            parsedWords.forEach((word, index) => {
                const item = document.createElement('div');
                item.className = 'p-3 bg-gray-50 rounded-md border flex items-start';
                item.innerHTML = `
                    <input type="checkbox" checked id="word-checkbox-${index}" data-index="${index}" class="word-checkbox h-5 w-5 rounded text-indigo-600 focus:ring-indigo-500 border-gray-300 mr-4 mt-1">
                    <div class="flex-1">
                        <p><strong>英文:</strong> ${word.english}</p>
                        <p><strong>中文:</strong> ${word.chinese}</p>
                        ${word.sentence ? `
                        <div class="mt-2 pt-2 border-t border-gray-200">
                            <p class="text-sm text-gray-600"><strong>例句 (英):</strong> ${word.sentence.en}</p>
                            <p class="text-sm text-gray-600"><strong>例句 (中):</strong> ${word.sentence.zh}</p>
                            ${word.sentence.answer ? `<p class="text-sm text-blue-700 font-semibold"><strong>克漏字答案:</strong> ${word.sentence.answer}</p>` : ''}
                        </div>
                        ` : ''}
                    </div>
                `;
                parseResultsContainer.appendChild(item);
            });
            parseConfirmModal.classList.remove('hidden');
        }
        
        // --- 音檔預載相關函式 ---
        
        let audioPreloadQueue = [];
        let preloadedAudio = {};
        let totalAudioCount = 0;
        let loadedAudioCount = 0;

        function preloadAudioFiles() {
            audioPreloadQueue = [];
            preloadedAudio = {};
            
            // 收集所有需要語音的單字
            const wordsToSpeak = new Set();
            words.forEach(word => {
                if (word.english) {
                    wordsToSpeak.add(word.english.replace(/[\((\[【].*?[\))\]】]/g, "").trim());
                }
            });
            
            audioPreloadQueue = Array.from(wordsToSpeak);
            totalAudioCount = audioPreloadQueue.length;
            loadedAudioCount = 0;
            
            if (totalAudioCount === 0) {
                audioPreloadContainer.classList.add('hidden');
                return;
            }
            
            audioPreloadContainer.classList.remove('hidden');
            audioPreloadText.textContent = `正在預載語音檔案... (0/${totalAudioCount})`;
            audioPreloadBar.style.width = '0%';
            
            preloadNextAudio();
        }

        function preloadNextAudio() {
            if (audioPreloadQueue.length === 0) {
                audioPreloadText.textContent = `語音檔案預載完成! (${totalAudioCount}/${totalAudioCount})`;
                setTimeout(() => audioPreloadContainer.classList.add('hidden'), 2000);
                return;
            }
            
            const word = audioPreloadQueue.shift();
            const url = `https://api.dictionaryapi.dev/api/v2/entries/en/${word}`;
            
            fetch(url)
                .then(response => response.json())
                .then(data => {
                    let audioUrl = null;
                    if (Array.isArray(data) && data.length > 0) {
                        for (const meaning of data) {
                            if (meaning.phonetics && meaning.phonetics.length > 0) {
                                for (const phonetic of meaning.phonetics) {
                                    if (phonetic.audio) {
                                        audioUrl = phonetic.audio;
                                        break;
                                    }
                                }
                            }
                            if (audioUrl) break;
                        }
                    }
                    
                    if (audioUrl) {
                        const audio = new Audio(audioUrl);
                        audio.preload = 'auto';
                        audio.oncanplaythrough = () => {
                            preloadedAudio[word] = audio;
                            loadedAudioCount++;
                            updateAudioPreloadProgress();
                            preloadNextAudio();
                        };
                        audio.onerror = () => {
                            // 載入失敗也算完成,繼續下一個
                            loadedAudioCount++;
                            updateAudioPreloadProgress();
                            preloadNextAudio();
                        };
                    } else {
                        // 找不到音檔也算完成,繼續下一個
                        loadedAudioCount++;
                        updateAudioPreloadProgress();
                        preloadNextAudio();
                    }
                })
                .catch(error => {
                    console.error(`預載 ${word} 音檔失敗:`, error);
                    loadedAudioCount++;
                    updateAudioPreloadProgress();
                    preloadNextAudio();
                });
        }

        function updateAudioPreloadProgress() {
            const percentage = totalAudioCount > 0 ? (loadedAudioCount / totalAudioCount) * 100 : 100;
            audioPreloadBar.style.width = `${percentage}%`;
            audioPreloadText.textContent = `正在預載語音檔案... (${loadedAudioCount}/${totalAudioCount})`;
        }
        
        function speakWord(word) {
            const cleanWord = word.replace(/[\((\[【].*?[\))\]】]/g, "").trim();
            
            if (preloadedAudio[cleanWord]) {
                preloadedAudio[cleanWord].currentTime = 0;
                preloadedAudio[cleanWord].play();
                
                speakBtn.disabled = true;
                preloadedAudio[cleanWord].onended = () => {
                    speakBtn.disabled = false;
                };
                preloadedAudio[cleanWord].onerror = () => {
                    speakBtn.disabled = false;
                };
                return;
            }
            
            // 如果沒有預載,則嘗試即時獲取
            const url = `https://api.dictionaryapi.dev/api/v2/entries/en/${cleanWord}`;
            
            speakBtn.disabled = true;
            
            fetch(url)
                .then(response => response.json())
                .then(data => {
                    let audioUrl = null;
                    if (Array.isArray(data) && data.length > 0) {
                        for (const meaning of data) {
                            if (meaning.phonetics && meaning.phonetics.length > 0) {
                                for (const phonetic of meaning.phonetics) {
                                    if (phonetic.audio) {
                                        audioUrl = phonetic.audio;
                                        break;
                                    }
                                }
                            }
                            if (audioUrl) break;
                        }
                    }
                    
                    if (audioUrl) {
                        const audio = new Audio(audioUrl);
                        audio.play();
                        audio.onended = () => { speakBtn.disabled = false; };
                        audio.onerror = () => { speakBtn.disabled = false; };
                    } else {
                        // 如果找不到音檔,使用瀏覽器內建的語音合成
                        if ('speechSynthesis' in window) {
                            const utterance = new SpeechSynthesisUtterance(cleanWord);
                            utterance.lang = 'en-US';
                            utterance.rate = 0.8;
                            window.speechSynthesis.speak(utterance);
                            utterance.onend = () => { speakBtn.disabled = false; };
                            utterance.onerror = () => { speakBtn.disabled = false; };
                        } else {
                            alert("找不到音檔且瀏覽器不支援語音合成。");
                            speakBtn.disabled = false;
                        }
                    }
                })
                .catch(error => {
                    console.error('即時獲取音檔失敗:', error);
                    // 失敗後嘗試使用瀏覽器內建的語音合成
                    if ('speechSynthesis' in window) {
                        const utterance = new SpeechSynthesisUtterance(cleanWord);
                        utterance.lang = 'en-US';
                        utterance.rate = 0.8;
                        window.speechSynthesis.speak(utterance);
                        utterance.onend = () => { speakBtn.disabled = false; };
                        utterance.onerror = () => { speakBtn.disabled = false; };
                    } else {
                        alert("即時獲取音檔失敗且瀏覽器不支援語音合成。");
                        speakBtn.disabled = false;
                    }
                });
        }
        
        // --- 事件監聽 ---
        
        // 確保在頁面載入後初始化版本設定
        window.addEventListener('load', initializeVersion);

        document.querySelectorAll('.mode-btn[data-mode]').forEach(btn => {
            btn.addEventListener('click', () => setupLearningView(btn.dataset.mode));
        });

        resetCrownsBtn.addEventListener('click', () => {
            completionStatus = {};
            localStorage.removeItem('completionStatus');
            updateCompletionUI();
            
            highScore = 0;
            localStorage.removeItem('flashcardsHighScore');
            highscoreDisplay.textContent = highScore;

            const originalText = resetCrownsBtn.textContent;
            resetCrownsBtn.textContent = '已重置!';
            resetCrownsBtn.disabled = true;
            setTimeout(() => {
                resetCrownsBtn.textContent = originalText;
                resetCrownsBtn.disabled = false;
            }, 2000);
        });

        backToMenuBtn.addEventListener('click', () => {
            clearInterval(timerInterval);
            const isQuiz = !['review', 'speed', ''].includes(currentMode);
            if (isQuiz && quizStartTime > 0) {
                const attempted = wordsForCurrentMode.length - quizQueue.length;
                if (attempted > 0) {
                    const elapsedTime = Math.round((Date.now() - quizStartTime) / 1000);
                    const reportData = {
                        total: wordsForCurrentMode.length,
                        attempted: attempted,
                        mistakes: quizIncorrectCount,
                        time: elapsedTime,
                        date: new Date().toISOString(),
                        status: 'abandoned'
                    };
                    const history = gradeReports[currentMode] || [];
                    history.push(reportData);
                    gradeReports[currentMode] = history;
                    saveWordsToStorage();
                }
            }
            currentMode = '';
            showView('main-menu');
        });

        flipCardBtn.addEventListener('click', () => {
            flashcardContainer.classList.toggle('flipped');
        });

        prevCardBtn.addEventListener('click', () => {
            if (currentCardIndex > 0) {
                currentCardIndex--;
                flashcardContainer.classList.remove('flipped');
                displayCard();
            }
        });

        nextCardBtn.addEventListener('click', () => {
            if (currentCardIndex < wordsForCurrentMode.length - 1) {
                currentCardIndex++;
                flashcardContainer.classList.remove('flipped');
                displayCard();
            }
        });

        submitAnswerBtn.addEventListener('click', checkAnswer);
        
        // 允許按 Enter 提交答案
        answerInput.addEventListener('keypress', (e) => {
            if (e.key === 'Enter') {
                checkAnswer();
            }
        });
        
        hintBtn.addEventListener('click', () => {
            const card = quizQueue[0];
            if (!card) return;
            
            let answer;
            switch (currentMode) {
                case 'zh-en':
                case 'listen':
                case 'hard':
                    answer = card.english.replace(/[\((\[【].*?[\))\]】]/g, "").trim();
                    break;
                case 'en-zh':
                    answer = card.chinese.replace(/[\((\[【].*?[\))\]】]/g, "").trim();
                    break;
                default:
                    return;
            }
            
            if (answer.length > 0) {
                const hint = answer.charAt(0) + '...';
                answerInput.value = hint;
                answerInput.focus();
            }
        });

        // --- 單字管理事件 ---
        
        manageWordsBtn.addEventListener('click', () => {
            loadApiKey(); // 載入 API Key
            showView('word-management-view');
        });
        
        backToModesFromManageBtn.addEventListener('click', () => {
            showView('main-menu');
        });
        
        addWordBtn.addEventListener('click', () => {
            const english = newEnglish.value.trim();
            const chinese = newChinese.value.trim();
            const sentenceEn = newSentenceEn.value.trim();
            const sentenceZh = newSentenceZh.value.trim();
            const sentenceAnswer = newSentenceAnswer.value.trim();
            
            if (!english || !chinese) {
                alert("英文單字和中文翻譯為必填項。");
                return;
            }
            
            const newWord = {
                english: english,
                chinese: chinese,
                proficiency: 0,
                incorrectCount: 0
            };
            
            if (sentenceEn && sentenceZh && sentenceAnswer) {
                newWord.sentence = {
                    en: sentenceEn,
                    zh: sentenceZh,
                    answer: sentenceAnswer
                };
            }
            
            words.push(newWord);
            saveWordsToStorage();
            renderWordList();
            preloadAudioFiles(); // 新增單字後重新預載音檔
            
            // 清空輸入框
            newEnglish.value = '';
            newChinese.value = '';
            newSentenceEn.value = '';
            newSentenceZh.value = '';
            newSentenceAnswer.value = '';
            
            alert("單字新增成功!");
        });
        
        clearAllWordsBtn.addEventListener('click', () => {
            confirmClearModal.classList.remove('hidden');
        });
        
        cancelClearBtn.addEventListener('click', () => {
            confirmClearModal.classList.add('hidden');
        });
        
        confirmClearBtn.addEventListener('click', () => {
            words = [];
            gradeReports = {};
            completionStatus = {};
            highScore = 0;
            localStorage.removeItem('flashcardsWords');
            localStorage.removeItem('flashcardsReports');
            localStorage.removeItem('flashcardsTitle');
            localStorage.removeItem('flashcardsHighScore');
            localStorage.removeItem('completionStatus');
            
            mainTitle.textContent = '單字閃卡';
            titleInput.value = '單字閃卡';
            highscoreDisplay.textContent = 0;
            
            renderWordList();
            updateCompletionUI();
            confirmClearModal.classList.add('hidden');
            preloadAudioFiles(); // 清除後重置音檔預載
            alert("所有單字和紀錄已清除!");
        });
        
        saveTitleBtn.addEventListener('click', () => {
            const newTitle = titleInput.value.trim() || '單字閃卡';
            mainTitle.textContent = newTitle;
            localStorage.setItem('flashcardsTitle', newTitle);
            
            const originalText = saveTitleBtn.textContent;
            saveTitleBtn.textContent = '標題已儲存!';
            setTimeout(() => {
                saveTitleBtn.textContent = originalText;
            }, 1500);
        });
        
        // --- 分享功能事件 ---
        
        shareGameBtn.addEventListener('click', async () => {
            if (words.length === 0) {
                alert("請先新增單字才能分享!");
                return;
            }
            
            // 1. 壓縮單字資料
            const jsonString = JSON.stringify(words);
            const compressed = pako.deflate(jsonString, { to: 'string' });
            const encodedData = btoa(compressed);
            
            // 2. 取得標題
            const title = encodeURIComponent(mainTitle.textContent);
            
            // 3. 取得版本鎖定設定
            const lockSetting = document.querySelector('input[name="version-lock"]:checked').value;
            let versionParam = '';
            if (lockSetting !== 'auto') {
                versionParam = `&version=${lockSetting}`;
            }
            
            // 4. 組合分享連結
            const shareLink = `${window.location.origin}${window.location.pathname}?title=${title}&data=${encodedData}${versionParam}`;
            
            shareLinkInput.value = shareLink;
            
            // 5. 產生 QR Code
            qrcodeContainer.innerHTML = '';
            const qr = qrcode(0, 'M');
            qr.addData(shareLink);
            qr.make();
            const imgTag = qr.createImgTag(6, 10); // 6: 模組大小, 10: 邊界
            qrcodeContainer.innerHTML = imgTag;
            
            shareModal.classList.remove('hidden');
        });
        
        closeShareModalBtn.addEventListener('click', () => {
            shareModal.classList.add('hidden');
        });
        
        copyLinkBtn.addEventListener('click', () => {
            shareLinkInput.select();
            shareLinkInput.setSelectionRange(0, 99999); // For mobile devices
            document.execCommand('copy');
            
            const originalText = copyLinkBtn.textContent;
            copyLinkBtn.textContent = '已複製!';
            setTimeout(() => {
                copyLinkBtn.textContent = originalText;
            }, 1500);
        });
        
        // --- 成績報告事件 ---
        
        gradeReportBtn.addEventListener('click', () => {
            renderGradeReport();
            showView('grade-report-view');
        });
        
        backToModesFromReportBtn.addEventListener('click', () => {
            showView('main-menu');
        });
        
        function renderGradeReport() {
            const formatTime = (seconds) => {
                const min = Math.floor(seconds / 60);
                const sec = seconds % 60;
                return `${min}${sec}秒`;
            };
            
            const renderModeReport = (container, mode, title) => {
                container.innerHTML = '';
                const reports = gradeReports[mode] || [];
                
                if (reports.length === 0) {
                    container.innerHTML = `<p class="text-center text-gray-500">尚無 ${title} 測驗紀錄。</p>`;
                    return;
                }
                
                reports.sort((a, b) => new Date(b.date) - new Date(a.date));
                
                reports.forEach((report, index) => {
                    const date = new Date(report.date).toLocaleString('zh-TW', {
                        year: 'numeric', month: 'numeric', day: 'numeric',
                        hour: '2-digit', minute: '2-digit'
                    });
                    
                    let statusClass = 'bg-green-100 text-green-800';
                    let statusText = '完成';
                    let summary = '';
                    
                    if (mode === 'speed') {
                        summary = `得分: <span class="font-bold text-amber-600">${report.score}</span>`;
                        statusText = '極速挑戰';
                        statusClass = 'bg-slate-100 text-slate-800';
                    } else {
                        if (report.status === 'abandoned') {
                            statusClass = 'bg-yellow-100 text-yellow-800';
                            statusText = '中途放棄';
                            summary = `已作答 ${report.attempted} 題,錯誤 ${report.mistakes} 次`;
                        } else {
                            summary = `總題數 ${report.total} 題,錯誤 <span class="font-bold text-red-500">${report.mistakes}</span> 次`;
                            if (report.mistakes === 0) {
                                statusClass = 'bg-green-100 text-green-800';
                                summary += ' (👑 完美)';
                            } else {
                                statusClass = 'bg-red-100 text-red-800';
                            }
                        }
                        summary += `, 耗時 ${formatTime(report.time)}`;
                    }
                    
                    const item = document.createElement('div');
                    item.className = 'p-3 border rounded-lg bg-white shadow-sm';
                    item.innerHTML = `
                        <div class="flex justify-between items-center mb-1">
                            <span class="text-xs text-gray-500">${date}</span>
                            <span class="text-xs font-semibold px-2 py-0.5 rounded-full ${statusClass}">${statusText}</span>
                        </div>
                        <p class="text-sm text-gray-700">${summary}</p>
                    `;
                    container.appendChild(item);
                });
            };
            
            renderModeReport(reportZhEn, 'zh-en', '中翻英');
            renderModeReport(reportEnZh, 'en-zh', '英翻中');
            renderModeReport(reportListen, 'listen', '聽力測驗');
            renderModeReport(document.createElement('div'), 'speed', '極速挑戰'); // 極速挑戰的報告不顯示在主報告區,但會被儲存
        }
        
        // --- AI 解析流程事件 ---
        
        saveApiKeyBtn.addEventListener('click', saveApiKey);
        
        parsePdfBtn.addEventListener('click', async () => {
            parsePdfBtn.disabled = true;
            aiProgressContainer.classList.remove('hidden');
            updateAIProgressBar(0);
            parseStatus.textContent = '正在準備解析...';
            
            let textToParse = textInput.value.trim();
            
            if (pdfUploadInput.files.length > 0) {
                const file = pdfUploadInput.files[0];
                parseStatus.textContent = `正在讀取 PDF 檔案: ${file.name}...`;
                updateAIProgressBar(10);
                
                try {
                    const pdf = await pdfjsLib.getDocument(URL.createObjectURL(file)).promise;
                    let fullText = '';
                    
                    for (let i = 1; i <= pdf.numPages; i++) {
                        const page = await pdf.getPage(i);
                        const textContent = await page.getTextContent();
                        fullText += textContent.items.map(item => item.str).join(' ') + '\n\n';
                        updateAIProgressBar(10 + (i / pdf.numPages) * 40); // 讀取進度到 50%
                    }
                    textToParse = fullText.trim();
                    parseStatus.textContent = 'PDF 讀取完成,開始 AI 分析...';
                    updateAIProgressBar(50);
                    
                } catch (error) {
                    console.error('PDF 讀取失敗:', error);
                    parseStatus.textContent = `PDF 讀取失敗: ${error.message}`;
                    parsePdfBtn.disabled = false;
                    aiProgressContainer.classList.add('hidden');
                    return;
                }
            }
            
            if (textToParse) {
                await callGeminiToParseText(textToParse);
            } else {
                parseStatus.textContent = '請上傳 PDF 檔案或貼上文字內容。';
                parsePdfBtn.disabled = false;
                aiProgressContainer.classList.add('hidden');
            }
        });
        
        selectAllCheckbox.addEventListener('change', (e) => {
            const isChecked = e.target.checked;
            parseResultsContainer.querySelectorAll('.word-checkbox').forEach(checkbox => {
                checkbox.checked = isChecked;
            });
        });

        confirmParseBtn.addEventListener('click', () => {
            const selectedWords = [];
            const checkboxes = parseResultsContainer.querySelectorAll('.word-checkbox:checked');
            
            checkboxes.forEach(checkbox => {
                const index = parseInt(checkbox.dataset.index, 10);
                selectedWords.push(parsedWordsFromAI[index]);
            });

            const newWords = selectedWords.map(word => ({
                ...word,
                proficiency: 0,
                incorrectCount: 0
            }));
            words.push(...newWords);
            saveWordsToStorage();
            renderWordList();
            preloadAudioFiles(); // 解析完後也預載新的音檔
            parseConfirmModal.classList.add('hidden');
            parseStatus.textContent = `成功新增 ${selectedWords.length} 個單字!`;
            pdfUploadInput.value = '';
            textInput.value = '';
            parsedWordsFromAI = [];
        });

        cancelParseBtn.addEventListener('click', () => {
            parseConfirmModal.classList.add('hidden');
            parseStatus.textContent = '操作已取消。';
            pdfUploadInput.value = '';
            textInput.value = '';
            parsedWordsFromAI = [];
        });
        
        // --- 範圍選擇與隨機題數連動 ---
        
        randomQuestionsCheckbox.addEventListener('change', (e) => {
            randomQuestionsCountInput.disabled = !e.target.checked;
            if (e.target.checked) {
                randomQuestionsCountInput.focus();
            }
        });

        // --- 初始化 ---
        loadWordsFromStorage();
        
    </script>
</body>
</html>