添加动词拼接学习页

整合动词拼接沙盒，并扩充常见复合动词词库，方便在歌词学习之外进行动词组合练习。 Co-authored-by: Cursor <cursoragent@cursor.com>
2026-07-20 11:45:01 +08:00
parent bf127782f4
commit 550b5743f6
9 changed files with 2292 additions and 120 deletions
@@ -10,6 +10,7 @@ import { LineItem } from './components/LineItem';
 import { Sidebar, SavedDocumentNote } from './components/Sidebar';
 import { AppNav, AppView } from './components/AppNav';
 import { VocabCards } from './components/VocabCards';
+import { CompoundVerbLab } from './components/CompoundVerbLab';
 import { adjustFuriganaItemsForTextChange, normalizeLine, normalizeLines } from './utils';
 import { apiUrl } from './api';
 import { Check, Copy, Plus, X } from 'lucide-react';
@@ -980,7 +981,7 @@ export default function App() {
      {saveNotice && (
        <div className="fixed top-4 left-1/2 z-50 -translate-x-1/2 pointer-events-none">
          <div
-            className={`rounded-full border px-4 py-1.5 text-xs font-semibold shadow-sm ${
+            className={`border px-4 py-1.5 text-xs font-semibold ${
              saveNotice.type === 'success'
                ? 'border-emerald-200 bg-emerald-50 text-emerald-700'
                : 'border-rose-200 bg-rose-50 text-rose-700'
@@ -1007,8 +1008,8 @@ export default function App() {
        <AppNav activeView={activeView} onChange={setActiveView} />
        <main className="flex min-h-0 min-w-0 flex-1 flex-col overflow-hidden">
      {activeView === 'lyrics' && showSavedArea && (
-        <div className="fixed left-1/2 top-20 z-40 w-[calc(100vw-1rem)] max-w-2xl -translate-x-1/2 text-xs select-none">
-          <div className="bg-[#FDFCFB] border border-[#E8E4DE] rounded-xl p-2 shadow-xl animate-in fade-in duration-200">
+        <div className="fixed left-1/2 top-16 z-40 w-[calc(100vw-1rem)] max-w-2xl -translate-x-1/2 text-xs select-none">
+          <div className="bg-[#FDFCFB] border border-[#E8E4DE] p-1 animate-in fade-in duration-200">
            {serverSaveFiles.length > 0 ? (
              <div className="space-y-1.5 max-h-[min(62vh,420px)] overflow-y-auto">
                {serverSaveFiles.map((file) => (
@@ -1016,7 +1017,7 @@ export default function App() {
                    key={file.name}
                    type="button"
                    onClick={() => handleLoadServerSave(file)}
-                    className="w-full text-left bg-white hover:bg-[#FAF9F6] active:bg-[#E8E4DE]/30 border border-[#E8E4DE]/70 hover:border-[#8B7E74]/40 rounded-lg px-3 py-2.5 transition cursor-pointer"
+                    className="w-full text-left bg-white hover:bg-[#FAF9F6] active:bg-[#E8E4DE]/30 border-b border-[#E8E4DE]/70 px-3 py-2 transition cursor-pointer last:border-b-0"
                  >
                    <div className="min-w-0">
                      <div className="font-semibold text-[#2D2926] truncate">{file.title}</div>
@@ -1025,7 +1026,7 @@ export default function App() {
                ))}
              </div>
            ) : (
-              <div className="py-6 text-center text-[#A69F92] bg-white border border-dashed border-[#E8E4DE] rounded-lg">
+              <div className="py-6 text-center text-[#A69F92] bg-white border border-dashed border-[#E8E4DE]">
                还没有保存的歌词
              </div>
            )}
@@ -1036,9 +1037,9 @@ export default function App() {
      {activeView === 'lyrics' ? (
      <div className="flex-1 flex overflow-hidden">
        {/* LEFT COMPARTMENT: The writing sheet */}
-        <div className="flex-1 overflow-y-auto px-1 py-1 md:px-4 md:py-4 flex flex-col items-center bg-[#FAF9F6]">
+        <div className="flex-1 overflow-y-auto px-0 py-0 md:px-2 md:py-2 flex flex-col items-center bg-[#FAF9F6]">
          <div
-            className="w-full bg-[#FDFCFB] premium-shadow min-h-[85vh] h-auto flex-shrink-0 rounded-xl border border-[#E8E4DE] px-1 py-2 sm:p-5 md:p-8 relative flex flex-col animate-fadeIn overflow-x-hidden md:overflow-x-auto"
+            className="w-full bg-[#FDFCFB] min-h-[85vh] h-auto flex-shrink-0 px-1 py-2 sm:p-4 md:p-6 relative flex flex-col animate-fadeIn overflow-x-hidden md:overflow-x-auto"
          >
            <div className="mt-1 mb-3 md:mt-2 md:mb-4 flex justify-center">
              <input
@@ -1057,10 +1058,10 @@ export default function App() {
            </div>

            {showImportArea && (
-              <div className="mt-1 mb-3 text-xs select-none relative z-20 bg-[#FDFCFB] border border-[#E8E4DE] rounded-xl p-4 shadow-sm animate-in fade-in duration-200">
+              <div className="mt-1 mb-3 text-xs select-none relative z-20 bg-[#FDFCFB] border-y border-[#E8E4DE] p-3 animate-in fade-in duration-200">
                <p className="text-[11px] text-[#A69F92] mb-3 leading-relaxed">
                  粘贴整段日语文本后，系统会按换行切成写字板的每一行；也支持类似
-                  <code className="bg-[#FAF9F6] px-1 py-0.5 mx-1 text-[#8B7E74] font-mono rounded">
+                  <code className="bg-[#FAF9F6] px-1 py-0.5 mx-1 text-[#8B7E74] font-mono">
                    日本語&#123;にほんご&#125;
                  </code>
                  的注音格式。
@@ -1070,7 +1071,7 @@ export default function App() {
                  value={importText}
                  onChange={(e) => setImportText(e.target.value)}
                  placeholder="在此粘贴整段文本，每一行会变成写字板的一行。"
-                  className="w-full text-xs font-mono bg-[#FAF9F6] border border-[#E8E4DE] rounded-lg p-3 focus:outline-none focus:ring-1 focus:ring-[#8B7E74] text-[#2D2926] placeholder-[#A69F92]/60 resize-y"
+                  className="w-full text-xs font-mono bg-[#FAF9F6] border border-[#E8E4DE] p-2.5 focus:outline-none focus:ring-1 focus:ring-[#8B7E74] text-[#2D2926] placeholder-[#A69F92]/60 resize-y"
                />
                <div className="mt-3.5 flex flex-wrap items-center justify-between gap-3 border-t border-[#E8E4DE]/40 pt-3">
                  <div className="flex flex-wrap items-center gap-4 text-[11px]">
@@ -1102,13 +1103,13 @@ export default function App() {
                        setImportText('');
                        setShowImportArea(false);
                      }}
-                      className="px-3 py-1.5 bg-white border border-[#E8E4DE] hover:bg-[#FAF9F6] text-[#A69F92] hover:text-[#2D2926] font-semibold rounded-lg transition"
+                      className="px-3 py-1.5 bg-white border border-[#E8E4DE] hover:bg-[#FAF9F6] text-[#A69F92] hover:text-[#2D2926] font-semibold transition"
                    >
                      取消
                    </button>
                    <button
                      onClick={handleBulkImport}
-                      className="px-4 py-1.5 bg-[#8B7E74] hover:bg-[#786C63] text-white font-bold rounded-lg transition shadow-2xs hover:shadow-xs disabled:opacity-40 disabled:cursor-not-allowed"
+                      className="px-4 py-1.5 bg-[#8B7E74] hover:bg-[#786C63] text-white font-bold transition disabled:opacity-40 disabled:cursor-not-allowed"
                      disabled={!importText.trim()}
                    >
                      确认导入
@@ -1128,7 +1129,7 @@ export default function App() {
              }
            }}>
              <div
-                className="mx-auto w-full max-w-none flex-1 flex flex-col divide-y divide-[#E8E4DE]/30 animate-fadeIn rounded-xl border-x border-[#8B7E74]/10 bg-[#FDFCFB]/70 shadow-[inset_4px_0_10px_-10px_rgba(139,126,116,0.45),inset_-4px_0_10px_-10px_rgba(139,126,116,0.45)] md:border-x-0 md:bg-transparent md:shadow-none"
+                className="mx-auto w-full max-w-none flex-1 flex flex-col divide-y divide-[#E8E4DE]/30 animate-fadeIn bg-[#FDFCFB]/70 md:bg-transparent"
                style={paperBackgroundStyle}
              >
                {lines.map((line, idx) => (
@@ -1216,22 +1217,24 @@ export default function App() {
          />
        </div>
      </div>
-      ) : (
+      ) : activeView === 'vocab' ? (
        <VocabCards />
+      ) : (
+        <CompoundVerbLab />
      )}
        </main>
      </div>

      {/* Floating Sticky Drawer for Mobile / Tablet screens which normally hides the Sidebar */}
      {activeView === 'lyrics' && currentSelection && (
-        <div id="mobile-annotations-drawer" className="lg:hidden fixed bottom-0 left-0 right-0 max-h-[70vh] bg-[#FDFCFB] border-t border-[#E8E4DE] shadow-2xl z-50 flex flex-col px-3 pt-2 pb-3 overflow-y-auto animate-in slide-in-from-bottom">
+        <div id="mobile-annotations-drawer" className="lg:hidden fixed bottom-0 left-0 right-0 max-h-[70vh] bg-[#FDFCFB] border-t border-[#E8E4DE] z-50 flex flex-col px-3 pt-2 pb-3 overflow-y-auto animate-in slide-in-from-bottom">
          <button
            onClick={() => {
              window.getSelection()?.removeAllRanges();
              setCurrentSelection(null);
              setFocusedNoteId(null);
            }}
-            className="absolute right-2 top-1.5 text-[#A69F92] hover:text-[#2D2926] p-1 rounded-full hover:bg-[#FAF9F6] cursor-pointer"
+            className="absolute right-2 top-1.5 text-[#A69F92] hover:text-[#2D2926] p-1 hover:bg-[#FAF9F6] cursor-pointer"
          >
            <X className="w-5 h-5" />
          </button>
@@ -1251,7 +1254,7 @@ export default function App() {
                  showTransientSaveNotice('复制失败', 'error');
                }
              }}
-              className="shrink-0 flex items-center gap-1 rounded-md border border-[#E8E4DE] bg-white px-2 py-1 text-[11px] font-semibold text-[#8B7E74] hover:bg-[#FAF9F6] active:bg-[#E8E4DE]/40"
+              className="shrink-0 flex items-center gap-1 border border-[#E8E4DE] bg-white px-2 py-1 text-[11px] font-semibold text-[#8B7E74] hover:bg-[#FAF9F6] active:bg-[#E8E4DE]/40"
              title="复制选中文本"
            >
              <Copy className="w-3.5 h-3.5" />
@@ -1289,7 +1292,7 @@ export default function App() {
                  rows={4}
                  id="comment-textarea-mobile-existing"
                  defaultValue={mobileSelectedNote.comment}
-                  className="w-full text-sm bg-white border border-[#E8E4DE] rounded p-2 focus:outline-none focus:ring-1 focus:ring-[#8B7E74] text-[#2D2926] leading-relaxed"
+                  className="w-full text-sm bg-white border border-[#E8E4DE] p-2 focus:outline-none focus:ring-1 focus:ring-[#8B7E74] text-[#2D2926] leading-relaxed"
                />
                <button
                  onClick={() => {
@@ -1308,7 +1311,7 @@ export default function App() {
                      setFocusedNoteId(null);
                    }
                  }}
-                  className="w-full py-2 bg-[#8B7E74] text-white font-semibold text-xs rounded text-center hover:bg-[#786C63] transition cursor-pointer"
+                  className="w-full py-2 bg-[#8B7E74] text-white font-semibold text-xs text-center hover:bg-[#786C63] transition cursor-pointer"
                >
                  保存修改
                </button>
@@ -1341,7 +1344,7 @@ export default function App() {
                  rows={3}
                  id="comment-textarea-mobile"
                  placeholder="在此为选中字词记录您的日语随笔、语法释义..."
-                  className="w-full text-xs bg-white border border-[#E8E4DE] rounded p-2 focus:outline-none focus:ring-1 focus:ring-[#8B7E74] mb-2 text-[#2D2926]"
+                  className="w-full text-xs bg-white border border-[#E8E4DE] p-2 focus:outline-none focus:ring-1 focus:ring-[#8B7E74] mb-2 text-[#2D2926]"
                />
                <button
                  onClick={() => {
@@ -1353,7 +1356,7 @@ export default function App() {
                      setCurrentSelection(null);
                    }
                  }}
-                  className="w-full py-2 bg-[#8B7E74] text-white font-semibold text-xs rounded text-center hover:bg-[#786C63] transition cursor-pointer"
+                  className="w-full py-2 bg-[#8B7E74] text-white font-semibold text-xs text-center hover:bg-[#786C63] transition cursor-pointer"
                >
                  快速保存
                </button>
@@ -4,9 +4,9 @@
 */

 import React from 'react';
-import { BookOpen, Layers3 } from 'lucide-react';
+import { BookOpen, GitMerge, Layers3 } from 'lucide-react';

-export type AppView = 'lyrics' | 'vocab';
+export type AppView = 'lyrics' | 'vocab' | 'compound';

 interface AppNavProps {
  activeView: AppView;
@@ -16,12 +16,13 @@ interface AppNavProps {
 const NAV_ITEMS = [
  { id: 'lyrics' as const, label: '歌词', icon: BookOpen },
  { id: 'vocab' as const, label: '单词卡片', icon: Layers3 },
+  { id: 'compound' as const, label: '动词拼接', icon: GitMerge },
 ];

 export const AppNav: React.FC<AppNavProps> = ({ activeView, onChange }) => {
  return (
    <>
-      <nav className="hidden lg:flex w-28 shrink-0 flex-col gap-2 border-r border-[#E8E4DE] bg-[#FDFCFB] p-2 shadow-[8px_0_24px_-24px_rgba(45,41,38,0.45)]">
+      <nav className="hidden lg:flex w-28 shrink-0 flex-col gap-1 border-r border-[#E8E4DE] bg-[#F5F1EA] p-2">
        {NAV_ITEMS.map((item) => {
          const Icon = item.icon;
          const isActive = activeView === item.id;
@@ -30,20 +31,20 @@ export const AppNav: React.FC<AppNavProps> = ({ activeView, onChange }) => {
              key={item.id}
              type="button"
              onClick={() => onChange(item.id)}
-              className={`flex w-full flex-col items-center gap-1 rounded-lg px-2 py-2 text-xs font-semibold transition ${
+              className={`flex w-full flex-col items-center gap-1 rounded-xl px-2 py-3 text-xs font-semibold transition-colors ${
                isActive
-                  ? 'bg-[#8B7E74] text-white'
-                  : 'bg-white text-[#8B7E74] hover:bg-[#FAF9F6] hover:text-[#2D2926]'
+                  ? 'bg-[#FDFCFB] text-[#2D2926]'
+                  : 'text-[#8B7E74] hover:bg-[#EFECE7] hover:text-[#2D2926]'
              }`}
            >
-              <Icon className={`h-4 w-4 ${isActive ? 'text-white' : 'text-[#8B7E74]'}`} />
+              <Icon className={`h-4 w-4 ${isActive ? 'text-[#2D2926]' : 'text-[#8B7E74]'}`} />
              {item.label}
            </button>
          );
        })}
      </nav>

-      <nav className="order-last grid shrink-0 grid-cols-2 border-t border-[#E8E4DE] bg-[#FDFCFB] px-3 py-2 shadow-[0_-8px_24px_-18px_rgba(45,41,38,0.4)] lg:hidden">
+      <nav className="order-last grid shrink-0 grid-cols-3 gap-2 border-t border-[#E8E4DE] bg-[#F5F1EA] p-2 lg:hidden">
        {NAV_ITEMS.map((item) => {
          const Icon = item.icon;
          const isActive = activeView === item.id;
@@ -52,13 +53,13 @@ export const AppNav: React.FC<AppNavProps> = ({ activeView, onChange }) => {
              key={item.id}
              type="button"
              onClick={() => onChange(item.id)}
-              className={`mx-1 flex items-center justify-center gap-2 rounded-lg py-2 text-xs font-semibold transition ${
+              className={`flex items-center justify-center gap-2 rounded-xl py-2 text-xs font-semibold transition-colors ${
                isActive
-                  ? 'bg-[#8B7E74] text-white'
-                  : 'bg-white text-[#8B7E74] border border-[#E8E4DE]'
+                  ? 'bg-[#FDFCFB] text-[#2D2926]'
+                  : 'text-[#8B7E74]'
              }`}
            >
-              <Icon className={`h-4 w-4 ${isActive ? 'text-white' : 'text-[#8B7E74]'}`} />
+              <Icon className={`h-4 w-4 ${isActive ? 'text-[#2D2926]' : 'text-[#8B7E74]'}`} />
              {item.label}
            </button>
          );
@@ -0,0 +1,450 @@
+/**
+ * @license
+ * SPDX-License-Identifier: Apache-2.0
+ */
+
+import React, { useEffect, useMemo, useState } from 'react';
+import { Bookmark, BookmarkCheck, CheckCircle, HelpCircle, RotateCcw, Volume2 } from 'lucide-react';
+import { CompoundVerb, SuffixVerb, Verb } from '../features/compoundVerbs/types';
+import {
+  COMPOUND_VERBS,
+  PREFIX_VERBS,
+  SUFFIX_VERBS,
+  VALID_COMBINATIONS_MAP,
+} from '../features/compoundVerbs/verbsData';
+
+type FusionState = 'idle' | 'success' | 'failed';
+
+const SAVED_COMPOUND_VERBS_KEY = 'kotonoha_compound_verbs_saved_ids';
+
+const getDanRow = (char: string) => {
+  const rows: Record<string, string> = {
+    う: 'う',
+    く: 'く',
+    ぐ: 'ぐ',
+    す: 'す',
+    つ: 'つ',
+    ぬ: 'ぬ',
+    ぶ: 'ぶ',
+    む: 'む',
+    る: 'う',
+  };
+  return rows[char] || 'う';
+};
+
+const conjugationRule = (verb: Verb) => {
+  const lastChar = verb.dictionaryForm.slice(-1);
+
+  if (verb.dictionaryForm === 'する') {
+    return '不规则动词：する 变为连用形「し」。';
+  }
+
+  if (verb.dictionaryForm === '来る') {
+    return '不规则动词：来る（くる）变为连用形「来」（き）。';
+  }
+
+  if (
+    verb.dictionaryForm.endsWith('る') &&
+    ['落ちる', '食べる', '信じる', '疲れる', '逃げる', '生きる', '見る', '考える', '助ける', '分ける', '鍛える', '燃える'].includes(
+      verb.dictionaryForm
+    )
+  ) {
+    return '二类动词（一段动词）：去掉词尾「る」，直接拼接。';
+  }
+
+  return `一类动词（五段动词）：词尾「${lastChar}」属于「${getDanRow(lastChar)}段」，变为对应い段后拼接。`;
+};
+
+const speakJapanese = (text: string) => {
+  if (!('speechSynthesis' in window)) return;
+
+  const utterance = new SpeechSynthesisUtterance(text);
+  utterance.lang = 'ja-JP';
+  utterance.rate = 0.86;
+  const voices = window.speechSynthesis.getVoices();
+  const jaVoice = voices.find((voice) => voice.lang.includes('ja') || voice.lang.includes('JP'));
+  if (jaVoice) utterance.voice = jaVoice;
+  window.speechSynthesis.speak(utterance);
+};
+
+export const CompoundVerbLab: React.FC = () => {
+  const [selectedPrefix, setSelectedPrefix] = useState<Verb | null>(null);
+  const [selectedSuffix, setSelectedSuffix] = useState<SuffixVerb | null>(null);
+  const [fusionState, setFusionState] = useState<FusionState>('idle');
+  const [foundVerb, setFoundVerb] = useState<CompoundVerb | null>(null);
+  const [savedVerbIds, setSavedVerbIds] = useState<string[]>([]);
+
+  useEffect(() => {
+    try {
+      const saved = localStorage.getItem(SAVED_COMPOUND_VERBS_KEY);
+      if (saved) setSavedVerbIds(JSON.parse(saved));
+    } catch (error) {
+      console.error('Error loading saved compound verbs', error);
+    }
+  }, []);
+
+  const recommendedSuffixes = useMemo(() => {
+    if (!selectedPrefix) return [];
+    return SUFFIX_VERBS.filter((suffix) => {
+      const key = `${selectedPrefix.dictionaryForm}-${suffix.id}`;
+      return VALID_COMBINATIONS_MAP[key]?.length > 0;
+    });
+  }, [selectedPrefix]);
+
+  const recommendedPrefixes = useMemo(() => {
+    if (!selectedSuffix) return [];
+    return PREFIX_VERBS.filter((prefix) => {
+      const key = `${prefix.dictionaryForm}-${selectedSuffix.id}`;
+      return VALID_COMBINATIONS_MAP[key]?.length > 0;
+    });
+  }, [selectedSuffix]);
+
+  const toggleSaveVerb = (id: string) => {
+    const next = savedVerbIds.includes(id)
+      ? savedVerbIds.filter((verbId) => verbId !== id)
+      : [...savedVerbIds, id];
+    setSavedVerbIds(next);
+    localStorage.setItem(SAVED_COMPOUND_VERBS_KEY, JSON.stringify(next));
+  };
+
+  const resolveFusion = (prefix: Verb | null, suffix: SuffixVerb | null) => {
+    if (!prefix || !suffix) {
+      setFusionState('idle');
+      setFoundVerb(null);
+      return;
+    }
+
+    const comboKey = `${prefix.dictionaryForm}-${suffix.id}`;
+    const foundIds = VALID_COMBINATIONS_MAP[comboKey] || [];
+    const verb = COMPOUND_VERBS.find((item) => item.id === foundIds[0]) || null;
+
+    setFoundVerb(verb);
+    setFusionState(verb ? 'success' : 'failed');
+    if (verb) speakJapanese(verb.kanji);
+  };
+
+  const selectPrefix = (prefix: Verb) => {
+    setSelectedPrefix(prefix);
+    resolveFusion(prefix, selectedSuffix);
+  };
+
+  const selectSuffix = (suffix: SuffixVerb) => {
+    setSelectedSuffix(suffix);
+    resolveFusion(selectedPrefix, suffix);
+  };
+
+  const reset = () => {
+    setSelectedPrefix(null);
+    setSelectedSuffix(null);
+    setFusionState('idle');
+    setFoundVerb(null);
+  };
+
+  return (
+    <div className="flex-1 overflow-y-auto bg-[#F5F1EA] px-3 py-4 lg:px-8 lg:py-6">
+      <div className="mx-auto flex max-w-6xl flex-col gap-4">
+        <header className="flex flex-col gap-1 px-1">
+          <h2 className="font-serif text-[clamp(1.7rem,3vw,2.4rem)] font-bold leading-tight tracking-wide text-[#2D2926]">
+            动词拼接
+          </h2>
+          <p className="text-sm leading-6 text-[#8B7E74]">
+            选择前项动词的连用形，再接一个后项动词，观察是否能组成常用复合动词。
+          </p>
+        </header>
+
+        <section className="grid gap-3 lg:grid-cols-[minmax(0,1fr)_360px]">
+          <div className="grid gap-3 md:grid-cols-2">
+            <VerbColumn
+              title="前项动词"
+              caption="变为连用形后拼接"
+              items={PREFIX_VERBS}
+              selectedKey={selectedPrefix?.dictionaryForm}
+              getKey={(verb) => verb.dictionaryForm}
+              getTitle={(verb) => verb.dictionaryForm}
+              getMeta={(verb) => `${verb.reading} / 连用形 ${verb.masuStemForm}`}
+              getMeaning={(verb) => verb.meaning}
+              recommendedKeys={recommendedPrefixes.map((verb) => verb.dictionaryForm)}
+              onSelect={selectPrefix}
+            />
+
+            <VerbColumn
+              title="后项动词"
+              caption="决定复合动词的方向和语义"
+              items={SUFFIX_VERBS}
+              selectedKey={selectedSuffix?.id}
+              getKey={(suffix) => suffix.id}
+              getTitle={(suffix) => `〜${suffix.kanji}`}
+              getMeta={(suffix) => `${suffix.reading} / ${suffix.exampleInEnglish}`}
+              getMeaning={(suffix) => suffix.meaning}
+              recommendedKeys={recommendedSuffixes.map((suffix) => suffix.id)}
+              onSelect={selectSuffix}
+            />
+          </div>
+
+          <aside className="flex flex-col gap-3">
+            <div className="rounded-2xl bg-[#FDFCFB] p-4">
+              <div className="mb-3 flex items-center justify-between">
+                <div className="text-xs font-semibold text-[#8B7E74]">拼接结果</div>
+                {(selectedPrefix || selectedSuffix) && (
+                  <button
+                    type="button"
+                    onClick={reset}
+                    className="flex items-center gap-1 rounded-full bg-[#E8E1D8] px-2.5 py-1 text-xs font-semibold text-[#6F6258] active:bg-[#DCD2C7]"
+                  >
+                    <RotateCcw className="h-3.5 w-3.5" />
+                    重置
+                  </button>
+                )}
+              </div>
+
+              <div className="grid grid-cols-[1fr_auto_1fr] items-center gap-2 text-center">
+                <FusionPart label="前项" value={selectedPrefix?.masuStemForm || '选择前项'} subValue={selectedPrefix?.dictionaryForm} />
+                <div className="text-lg font-bold text-[#8B7E74]">+</div>
+                <FusionPart label="后项" value={selectedSuffix?.kanji ? `〜${selectedSuffix.kanji}` : '选择后项'} subValue={selectedSuffix?.meaning} />
+              </div>
+
+              {selectedPrefix && (
+                <div className="mt-4 border-l-4 border-[#8B7E74]/40 pl-3 text-xs leading-5 text-[#6F6258]">
+                  {conjugationRule(selectedPrefix)}
+                </div>
+              )}
+            </div>
+
+            <ResultPanel
+              fusionState={fusionState}
+              foundVerb={foundVerb}
+              selectedPrefix={selectedPrefix}
+              selectedSuffix={selectedSuffix}
+              savedVerbIds={savedVerbIds}
+              recommendedPrefixes={recommendedPrefixes}
+              recommendedSuffixes={recommendedSuffixes}
+              onSelectPrefix={selectPrefix}
+              onSelectSuffix={selectSuffix}
+              onToggleSave={toggleSaveVerb}
+            />
+          </aside>
+        </section>
+      </div>
+    </div>
+  );
+};
+
+interface VerbColumnProps<T> {
+  title: string;
+  caption: string;
+  items: T[];
+  selectedKey?: string;
+  recommendedKeys: string[];
+  getKey: (item: T) => string;
+  getTitle: (item: T) => string;
+  getMeta: (item: T) => string;
+  getMeaning: (item: T) => string;
+  onSelect: (item: T) => void;
+}
+
+const VerbColumn = <T,>({
+  title,
+  caption,
+  items,
+  selectedKey,
+  recommendedKeys,
+  getKey,
+  getTitle,
+  getMeta,
+  getMeaning,
+  onSelect,
+}: VerbColumnProps<T>) => (
+  <section className="flex min-h-[460px] flex-col rounded-2xl bg-[#FDFCFB]">
+    <div className="border-b border-[#E8E4DE] px-4 py-3">
+      <div className="flex items-center justify-between gap-2">
+        <div className="font-semibold text-[#2D2926]">{title}</div>
+        <div className="text-xs text-[#8B7E74]">{items.length} 个</div>
+      </div>
+      <div className="mt-0.5 text-xs text-[#8B7E74]">{caption}</div>
+    </div>
+
+    <div className="flex-1 overflow-y-auto px-2 py-2">
+      {items.map((item) => {
+        const key = getKey(item);
+        const isSelected = selectedKey === key;
+        const isRecommended = recommendedKeys.includes(key);
+
+        return (
+          <button
+            key={key}
+            type="button"
+            onClick={() => onSelect(item)}
+            className={`w-full rounded-xl px-3 py-2 text-left transition-colors ${
+              isSelected
+                ? 'bg-[#E8E1D8] text-[#2D2926]'
+                : isRecommended
+                  ? 'bg-[#F5F1EA] text-[#2D2926]'
+                  : 'text-[#2D2926] hover:bg-[#F5F1EA]'
+            }`}
+          >
+            <div className="flex items-start justify-between gap-2">
+              <div className="min-w-0">
+                <div className="font-serif text-lg font-semibold leading-tight">{getTitle(item)}</div>
+                <div className="mt-0.5 truncate text-[11px] text-[#8B7E74]">{getMeta(item)}</div>
+              </div>
+              {isRecommended && !isSelected && (
+                <span className="shrink-0 rounded-full bg-[#8B7E74]/10 px-2 py-0.5 text-[10px] font-semibold text-[#8B7E74]">
+                  推荐
+                </span>
+              )}
+            </div>
+            <div className="mt-1 text-xs leading-5 text-[#6F6258]">{getMeaning(item)}</div>
+          </button>
+        );
+      })}
+    </div>
+  </section>
+);
+
+const FusionPart: React.FC<{ label: string; value: string; subValue?: string }> = ({ label, value, subValue }) => (
+  <div className="rounded-xl bg-[#F5F1EA] px-2 py-3">
+    <div className="text-[10px] font-semibold text-[#8B7E74]">{label}</div>
+    <div className="mt-1 font-serif text-lg font-bold text-[#2D2926]">{value}</div>
+    {subValue && <div className="mt-0.5 truncate text-[10px] text-[#8B7E74]">{subValue}</div>}
+  </div>
+);
+
+interface ResultPanelProps {
+  fusionState: FusionState;
+  foundVerb: CompoundVerb | null;
+  selectedPrefix: Verb | null;
+  selectedSuffix: SuffixVerb | null;
+  savedVerbIds: string[];
+  recommendedPrefixes: Verb[];
+  recommendedSuffixes: SuffixVerb[];
+  onSelectPrefix: (prefix: Verb) => void;
+  onSelectSuffix: (suffix: SuffixVerb) => void;
+  onToggleSave: (id: string) => void;
+}
+
+const ResultPanel: React.FC<ResultPanelProps> = ({
+  fusionState,
+  foundVerb,
+  selectedPrefix,
+  selectedSuffix,
+  savedVerbIds,
+  recommendedPrefixes,
+  recommendedSuffixes,
+  onSelectPrefix,
+  onSelectSuffix,
+  onToggleSave,
+}) => {
+  if (fusionState === 'success' && foundVerb) {
+    const isSaved = savedVerbIds.includes(foundVerb.id);
+
+    return (
+      <section className="rounded-2xl bg-[#FDFCFB] p-4">
+        <div className="mb-3 flex items-start justify-between gap-3">
+          <div>
+            <div className="flex items-center gap-1.5 text-xs font-semibold text-emerald-700">
+              <CheckCircle className="h-4 w-4" />
+              拼接成功
+            </div>
+            <h3 className="mt-2 font-serif text-3xl font-bold text-[#2D2926]">{foundVerb.kanji}</h3>
+            <div className="mt-1 text-xs text-[#8B7E74]">
+              {foundVerb.reading} / {foundVerb.romaji} / JLPT {foundVerb.jlpt}
+            </div>
+          </div>
+          <div className="flex shrink-0 gap-1">
+            <button
+              type="button"
+              onClick={() => speakJapanese(foundVerb.kanji)}
+              className="rounded-full bg-[#E8E1D8] p-2 text-[#6F6258] active:bg-[#DCD2C7]"
+              title="朗读"
+            >
+              <Volume2 className="h-4 w-4" />
+            </button>
+            <button
+              type="button"
+              onClick={() => onToggleSave(foundVerb.id)}
+              className="rounded-full bg-[#E8E1D8] p-2 text-[#6F6258] active:bg-[#DCD2C7]"
+              title={isSaved ? '取消收藏' : '收藏'}
+            >
+              {isSaved ? <BookmarkCheck className="h-4 w-4" /> : <Bookmark className="h-4 w-4" />}
+            </button>
+          </div>
+        </div>
+
+        <div className="space-y-3">
+          <div>
+            <div className="text-xs font-semibold text-[#8B7E74]">释义</div>
+            <div className="mt-1 text-sm font-semibold leading-6 text-[#2D2926]">{foundVerb.meaning}</div>
+          </div>
+          <div>
+            <div className="text-xs font-semibold text-[#8B7E74]">例句</div>
+            <div className="mt-1 font-serif text-sm leading-6 text-[#2D2926]">{foundVerb.exampleSentence.japanese}</div>
+            <div className="mt-1 text-xs leading-5 text-[#8B7E74]">{foundVerb.exampleSentence.translation}</div>
+          </div>
+          {foundVerb.notes && (
+            <div className="border-l-4 border-[#8B7E74]/40 pl-3 text-xs leading-5 text-[#6F6258]">{foundVerb.notes}</div>
+          )}
+        </div>
+      </section>
+    );
+  }
+
+  if (fusionState === 'failed' && selectedPrefix && selectedSuffix) {
+    return (
+      <section className="rounded-2xl bg-[#FDFCFB] p-4">
+        <div className="flex items-center gap-1.5 text-xs font-semibold text-rose-700">
+          <HelpCircle className="h-4 w-4" />
+          不常见拼接
+        </div>
+        <p className="mt-2 text-sm leading-6 text-[#2D2926]">
+          「{selectedPrefix.masuStemForm} + {selectedSuffix.kanji}」在当前核心词库里没有收录为常用复合动词。
+        </p>
+
+        {(recommendedSuffixes.length > 0 || recommendedPrefixes.length > 0) && (
+          <div className="mt-4 space-y-3">
+            {recommendedSuffixes.length > 0 && (
+              <RecommendationGroup title={`可搭配「${selectedPrefix.dictionaryForm}」的后项`}>
+                {recommendedSuffixes.slice(0, 6).map((suffix) => (
+                  <button
+                    key={suffix.id}
+                    type="button"
+                    onClick={() => onSelectSuffix(suffix)}
+                    className="rounded-full bg-[#F5F1EA] px-2.5 py-1 text-xs font-semibold text-[#6F6258]"
+                  >
+                    〜{suffix.kanji}
+                  </button>
+                ))}
+              </RecommendationGroup>
+            )}
+            {recommendedPrefixes.length > 0 && (
+              <RecommendationGroup title={`可搭配「〜${selectedSuffix.kanji}」的前项`}>
+                {recommendedPrefixes.slice(0, 6).map((prefix) => (
+                  <button
+                    key={prefix.dictionaryForm}
+                    type="button"
+                    onClick={() => onSelectPrefix(prefix)}
+                    className="rounded-full bg-[#F5F1EA] px-2.5 py-1 text-xs font-semibold text-[#6F6258]"
+                  >
+                    {prefix.dictionaryForm}
+                  </button>
+                ))}
+              </RecommendationGroup>
+            )}
+          </div>
+        )}
+      </section>
+    );
+  }
+
+  return (
+    <section className="rounded-2xl bg-[#FDFCFB] p-4 text-sm leading-6 text-[#8B7E74]">
+      从左右两栏各选择一个动词。选中后会立即判断是否存在常用复合动词，并提示可替代组合。
+    </section>
+  );
+};
+
+const RecommendationGroup: React.FC<{ title: string; children: React.ReactNode }> = ({ title, children }) => (
+  <div>
+    <div className="mb-1.5 text-xs font-semibold text-[#8B7E74]">{title}</div>
+    <div className="flex flex-wrap gap-1.5">{children}</div>
+  </div>
+);
@@ -350,7 +350,7 @@ export const LineItem: React.FC<LineItemProps> = ({
            e.stopPropagation();
            onNoteClick(earliestNote!);
          }}
-          className={`${colorClass} px-1 rounded border-b-2 font-medium cursor-pointer transition-all duration-200 inline-block active:scale-95`}
+          className={`${colorClass} px-1 border-b-2 font-medium cursor-pointer transition-all duration-200 inline-block active:scale-95`}
          title={`点击查看注释: ${earliestNote.comment}`}
        >
          {matchText}
@@ -456,7 +456,7 @@ export const LineItem: React.FC<LineItemProps> = ({
                onDoubleClick(line.id);
              }
            }}
-            className={`flex flex-col w-full min-w-0 select-text overflow-hidden pr-0.5 font-mono hover:bg-[#FAF9F6]/80 rounded px-0.5 md:-mx-1 md:px-1 md:pr-1 md:overflow-visible ${
+            className={`flex flex-col w-full min-w-0 select-text overflow-hidden pr-0.5 font-mono hover:bg-[#FAF9F6]/80 px-0.5 md:-mx-1 md:px-1 md:pr-1 md:overflow-visible ${
              canEdit ? 'cursor-text' : 'cursor-default'
            }`}
          >
@@ -197,20 +197,20 @@ export const Sidebar: React.FC<SidebarProps> = ({
        {selectedFurigana && selectedFuriganaLine && selectedFuriganaItem ? (
          <div className="space-y-3">
            <div className="flex justify-between items-center">
-              <span className="text-xs font-semibold text-[#2D2926] bg-[#8B7E74]/10 border border-[#8B7E74]/20 px-2 py-0.5 rounded flex items-center gap-1 leading-none">
+              <span className="text-xs font-semibold text-[#2D2926] bg-[#8B7E74]/10 border-l-4 border-[#8B7E74] px-2 py-0.5 flex items-center gap-1 leading-none">
                <Tag className="w-3 h-3" /> 假名操作区
              </span>
              <button
                type="button"
                onClick={onClearSelection}
-                className="text-[#A69F92] hover:text-[#2D2926] rounded-full hover:bg-[#FAF9F6] p-0.5 transition-colors"
+                className="text-[#A69F92] hover:text-[#2D2926] hover:bg-[#FAF9F6] p-0.5 transition-colors"
                title="关闭假名操作区"
              >
                <X className="w-4 h-4" />
              </button>
            </div>

-            <div className="bg-white border border-[#E8E4DE] rounded p-2.5 shadow-xs">
+            <div className="bg-white border-l-4 border-[#E8E4DE] p-2.5">
              <div className="text-[10px] text-[#8B7E74] font-bold mb-1 uppercase font-mono tracking-wider">
                当前假名:
              </div>
@@ -221,14 +221,14 @@ export const Sidebar: React.FC<SidebarProps> = ({
                  onUpdateFurigana(selectedFurigana.lineId, selectedFurigana.itemId, e.target.value)
                }
                placeholder="在此修改假名"
-                className="w-full bg-[#FAF9F6] border border-[#E8E4DE] rounded px-2 py-1.5 text-[#2D2926] text-base font-serif focus:outline-none focus:ring-1 focus:ring-[#8B7E74] placeholder-[#A69F92]/60"
+                className="w-full bg-[#FAF9F6] border border-[#E8E4DE] px-2 py-1.5 text-[#2D2926] text-base font-serif focus:outline-none focus:ring-1 focus:ring-[#8B7E74] placeholder-[#A69F92]/60"
              />
              <div className="mt-1 text-[11px] text-[#A69F92] font-mono">
                行 {(selectedFuriganaLineIndex + 1).toString().padStart(2, '0')}
              </div>
            </div>

-            <div className="bg-white border border-[#E8E4DE] rounded p-2.5 shadow-xs">
+            <div className="bg-white border-l-4 border-[#E8E4DE] p-2.5">
              <div className="mb-2 flex items-center justify-between gap-2">
                <span className="text-[10px] text-[#8B7E74] font-bold uppercase font-mono tracking-wider">
                  X 坐标
@@ -262,14 +262,14 @@ export const Sidebar: React.FC<SidebarProps> = ({
              <button
                type="button"
                onClick={() => onJumpToLine(selectedFurigana.lineId)}
-                className="flex-1 border border-[#E8E4DE] bg-white hover:bg-[#FAF9F6] text-[#8B7E74] hover:text-[#2D2926] font-semibold text-xs py-2 rounded shadow-xs transition-all cursor-pointer"
+                className="flex-1 border border-[#E8E4DE] bg-white hover:bg-[#FAF9F6] text-[#8B7E74] hover:text-[#2D2926] font-semibold text-xs py-2 transition-colors cursor-pointer"
              >
                定位该行
              </button>
              <button
                type="button"
                onClick={() => onDeleteFurigana(selectedFurigana.lineId, selectedFurigana.itemId)}
-                className="flex-1 border border-rose-200 hover:border-rose-400 bg-rose-50/55 hover:bg-rose-50 text-rose-700 hover:text-rose-800 font-semibold text-xs py-2 rounded shadow-xs transition-all flex items-center justify-center gap-1 cursor-pointer"
+                className="flex-1 border border-rose-200 hover:border-rose-400 bg-rose-50/55 hover:bg-rose-50 text-rose-700 hover:text-rose-800 font-semibold text-xs py-2 transition-colors flex items-center justify-center gap-1 cursor-pointer"
              >
                <Trash2 className="w-3.5 h-3.5" />
                删除假名
@@ -280,13 +280,13 @@ export const Sidebar: React.FC<SidebarProps> = ({
          /* ACTIVE NEW NOTE FORM */
          <form onSubmit={handleSaveNote} className="space-y-3">
            <div className="flex justify-between items-center">
-              <span className="text-xs font-semibold text-[#2D2926] bg-[#8B7E74]/10 border border-[#8B7E74]/20 px-2 py-0.5 rounded flex items-center gap-1 leading-none">
+              <span className="text-xs font-semibold text-[#2D2926] bg-[#8B7E74]/10 border-l-4 border-[#8B7E74] px-2 py-0.5 flex items-center gap-1 leading-none">
                <Tag className="w-3 h-3" /> {isEditing ? '修改注释' : '新建注释'}
              </span>
              <button
                type="button"
                onClick={onClearSelection}
-                className="text-[#A69F92] hover:text-[#2D2926] rounded-full hover:bg-[#FAF9F6] p-0.5 transition-colors"
+                className="text-[#A69F92] hover:text-[#2D2926] hover:bg-[#FAF9F6] p-0.5 transition-colors"
                title="取消选择"
              >
                <X className="w-4 h-4" />
@@ -294,7 +294,7 @@ export const Sidebar: React.FC<SidebarProps> = ({
            </div>

            {/* Selected Text Showcase */}
-            <div className="bg-white border border-[#E8E4DE] rounded p-2.5 shadow-xs">
+            <div className="bg-white border-l-4 border-[#E8E4DE] p-2.5">
              <div className="text-[10px] text-[#8B7E74] font-bold mb-1 uppercase font-mono tracking-wider">
                选中的字符:
              </div>
@@ -317,7 +317,7 @@ export const Sidebar: React.FC<SidebarProps> = ({
                    title={c.label}
                    className={`w-6 h-6 rounded-full border-2 transition-all flex items-center justify-center ${c.bg} ${
                      selectedColor === c.value
-                        ? 'border-[#8B7E74] scale-110 shadow-xs'
+                        ? 'border-[#8B7E74] scale-110'
                        : 'border-transparent hover:scale-105'
                    }`}
                  >
@@ -340,7 +340,7 @@ export const Sidebar: React.FC<SidebarProps> = ({
                value={commentText}
                onChange={(e) => setCommentText(e.target.value)}
                placeholder="在此录入释义、语法要点、生词短语等注释..."
-                className="w-full text-sm md:text-base bg-white border border-[#E8E4DE] rounded-lg p-3 focus:outline-none focus:ring-2 focus:ring-[#8B7E74]/40 focus:border-[#8B7E74] placeholder-neutral-400 text-[#2D2926] leading-relaxed shadow-inner"
+                className="w-full text-sm md:text-base bg-white border border-[#E8E4DE] p-2.5 focus:outline-none focus:ring-2 focus:ring-[#8B7E74]/40 focus:border-[#8B7E74] placeholder-neutral-400 text-[#2D2926] leading-relaxed"
                required
              />
            </div>
@@ -355,7 +355,7 @@ export const Sidebar: React.FC<SidebarProps> = ({
                      onClearSelection();
                    }
                  }}
-                  className="flex-1 border border-rose-200 hover:border-rose-400 bg-rose-50/55 hover:bg-rose-50 text-rose-700 hover:text-rose-800 font-semibold text-xs py-2 rounded shadow-xs transition-all flex items-center justify-center gap-1 cursor-pointer"
+                  className="flex-1 border border-rose-200 hover:border-rose-400 bg-rose-50/55 hover:bg-rose-50 text-rose-700 hover:text-rose-800 font-semibold text-xs py-2 transition-colors flex items-center justify-center gap-1 cursor-pointer"
                  title="删除此条注释"
                >
                  <Trash2 className="w-3.5 h-3.5" />
@@ -364,7 +364,7 @@ export const Sidebar: React.FC<SidebarProps> = ({
              )}
              <button
                type="submit"
-                className={`${editingNoteId ? 'flex-[2]' : 'w-full'} bg-[#8B7E74] text-white font-semibold text-xs py-2 rounded shadow-xs hover:bg-[#786C63] active:bg-[#665B53] transition-all font-sans cursor-pointer text-center`}
+                className={`${editingNoteId ? 'flex-[2]' : 'w-full'} bg-[#8B7E74] text-white font-semibold text-xs py-2 hover:bg-[#786C63] active:bg-[#665B53] transition-colors font-sans cursor-pointer text-center`}
              >
                {isEditing ? '保存修改' : '保存此条注释'}
              </button>
@@ -387,7 +387,7 @@ export const Sidebar: React.FC<SidebarProps> = ({
        <>
          {exactMatchedNotes.length > 0 && (
            <div className="p-3 bg-[#FAF9F6] border-b border-[#E8E4DE]">
-              <div className="bg-amber-50 border border-amber-200 rounded-lg p-3 shadow-xs">
+              <div className="bg-amber-50 border-l-4 border-amber-300 p-3">
                <div className="mb-2 flex items-center justify-between gap-2">
                  <span className="text-sm text-amber-900 font-bold font-sans tracking-wide">
                    其他歌词中出现
@@ -401,7 +401,7 @@ export const Sidebar: React.FC<SidebarProps> = ({
                  {exactMatchedNotes.map((note) => (
                    <div
                      key={`${note.lineId}-${note.id}`}
-                      className="rounded border border-amber-200 bg-white p-2.5 shadow-xs"
+                      className="border-l-4 border-amber-200 bg-white p-2.5"
                    >
                      <div className="mb-1.5 flex items-center justify-between gap-2">
                        {note.source === 'current' ? (
@@ -464,7 +464,7 @@ export const Sidebar: React.FC<SidebarProps> = ({
                        onFocusNote(note.id);
                      }
                    }}
-                    className={`group border rounded-lg p-3 bg-white hover:shadow-xs transition-all flex flex-col gap-2 relative cursor-pointer ${
+                    className={`group border-b p-3 bg-white transition-colors flex flex-col gap-2 relative cursor-pointer ${
                      isFocused
                        ? 'border-[#8B7E74] ring-1 ring-[#8B7E74]/30'
                        : 'border-[#E8E4DE]/60 hover:border-[#8B7E74]/60'
@@ -474,7 +474,7 @@ export const Sidebar: React.FC<SidebarProps> = ({
                    <div className="flex items-center justify-between">
                      {/* Highlight text indicator */}
                      <span
-                        className={`text-xs font-semibold px-2 py-0.5 rounded border ${badgeColorClass} font-serif max-w-[70%] truncate`}
+                        className={`text-xs font-semibold px-2 py-0.5 border ${badgeColorClass} font-serif max-w-[70%] truncate`}
                        title={note.text}
                      >
                        {note.text}
@@ -486,7 +486,7 @@ export const Sidebar: React.FC<SidebarProps> = ({
                          e.stopPropagation();
                          onJumpToLine(note.lineId);
                        }}
-                        className="text-[#A69F92] hover:text-[#2D2926] border border-transparent hover:border-[#E8E4DE] hover:bg-[#FAF9F6] px-1.5 py-0.5 rounded font-mono text-[10px] flex items-center gap-0.5 transition-all cursor-pointer"
+                        className="text-[#A69F92] hover:text-[#2D2926] border border-transparent hover:border-[#E8E4DE] hover:bg-[#FAF9F6] px-1.5 py-0.5 font-mono text-[10px] flex items-center gap-0.5 transition-colors cursor-pointer"
                        title="点击跳转并定位此行"
                      >
                        行 {note.lineNumber.toString().padStart(2, '0')}
@@ -506,7 +506,7 @@ export const Sidebar: React.FC<SidebarProps> = ({
                        onDeleteNote(note.lineId, note.id);
                      }}
                      title="删除此注释"
-                      className="absolute bottom-2.5 right-2.5 p-1 bg-[#FAF9F6] hover:bg-rose-50 border border-[#E8E4DE]/60 hover:border-rose-200 text-[#A69F92] hover:text-rose-700 rounded transition-all md:opacity-0 md:group-hover:opacity-100 cursor-pointer"
+                      className="absolute bottom-2.5 right-2.5 p-1 bg-[#FAF9F6] hover:bg-rose-50 border border-[#E8E4DE]/60 hover:border-rose-200 text-[#A69F92] hover:text-rose-700 transition-colors md:opacity-0 md:group-hover:opacity-100 cursor-pointer"
                    >
                      <Trash2 className="w-3 h-3" />
                    </button>
@@ -34,10 +34,10 @@ export const Toolbar: React.FC<ToolbarProps> = ({
  canEditDocument,
 }) => {
  return (
-    <div id="main-toolbar" className="bg-[#FDFCFB] border-b border-[#E8E4DE] px-3 py-2 sm:px-4 flex flex-col sm:flex-row sm:items-center justify-between gap-2 select-none">
+    <div id="main-toolbar" className="bg-[#FDFCFB] border-b border-[#E8E4DE] px-2 py-1.5 sm:px-3 flex flex-col sm:flex-row sm:items-center justify-between gap-1.5 select-none">
      {/* Brand / Logo */}
      <div className="flex items-center gap-2 min-w-0">
-        <div className="bg-[#8B7E74] text-white rounded-lg p-2 shadow-sm">
+        <div className="bg-[#8B7E74] text-white p-1.5">
          <BookOpen className="w-4 h-4" />
        </div>
        <div>
@@ -48,10 +48,10 @@ export const Toolbar: React.FC<ToolbarProps> = ({
      </div>

      {/* Document actions */}
-      <div className="flex flex-wrap items-center gap-1.5 text-xs select-none font-sans">
+      <div className="flex flex-wrap items-center gap-px text-xs select-none font-sans">
        <button
          onClick={onSaveDocument}
-          className="flex items-center gap-1 px-3 py-1.5 bg-[#8B7E74] hover:bg-[#786C63] text-white font-medium rounded-lg border border-[#8B7E74] shadow-2xs transition-all cursor-pointer"
+          className="flex items-center gap-1 px-3 py-1.5 bg-[#8B7E74] hover:bg-[#786C63] text-white font-medium transition-colors cursor-pointer"
          title="按当前文档标题保存到项目 saves 目录"
        >
          <Save className="w-3.5 h-3.5 text-white" />
@@ -61,10 +61,10 @@ export const Toolbar: React.FC<ToolbarProps> = ({
        {canEditDocument && (
          <button
            onClick={onToggleBulkImport}
-            className={`flex items-center gap-1 px-3 py-1.5 font-medium rounded-lg border shadow-2xs transition-all cursor-pointer ${
+            className={`flex items-center gap-1 px-3 py-1.5 font-medium transition-colors cursor-pointer ${
              showImportArea
-                ? 'bg-[#8B7E74] text-white border-[#8B7E74]'
-                : 'bg-white hover:bg-[#FAF9F6] text-[#2D2926] border-[#E8E4DE]'
+                ? 'bg-[#8B7E74] text-white'
+                : 'bg-white hover:bg-[#EFECE7] text-[#2D2926]'
            }`}
            title="粘贴整段文本并按行导入"
          >
@@ -76,7 +76,7 @@ export const Toolbar: React.FC<ToolbarProps> = ({
        {canEditDocument && (
          <button
            onClick={onNewDocument}
-            className="flex items-center gap-1 px-3 py-1.5 bg-white hover:bg-[#FAF9F6] text-[#2D2926] font-medium rounded-lg border border-[#E8E4DE] shadow-2xs transition-all cursor-pointer"
+            className="flex items-center gap-1 px-3 py-1.5 bg-white hover:bg-[#EFECE7] text-[#2D2926] font-medium transition-colors cursor-pointer"
            title="新建空白文档"
          >
            <Plus className="w-3.5 h-3.5 text-[#8B7E74]" />
@@ -86,10 +86,10 @@ export const Toolbar: React.FC<ToolbarProps> = ({

        <button
          onClick={onViewSavedDocuments}
-          className={`flex items-center gap-1 px-3 py-1.5 font-medium rounded-lg border shadow-2xs transition-all cursor-pointer ${
+          className={`flex items-center gap-1 px-3 py-1.5 font-medium transition-colors cursor-pointer ${
            showSavedArea
-              ? 'bg-[#8B7E74] text-white border-[#8B7E74]'
-              : 'bg-white hover:bg-[#FAF9F6] text-[#2D2926] border-[#E8E4DE]'
+              ? 'bg-[#8B7E74] text-white'
+              : 'bg-white hover:bg-[#EFECE7] text-[#2D2926]'
          }`}
          title="打开已保存歌词"
        >
@@ -4,7 +4,7 @@
 */

 import React, { useEffect, useState } from 'react';
-import { ArrowLeft, BookOpen, Layers3 } from 'lucide-react';
+import { ArrowLeft } from 'lucide-react';
 import { apiUrl } from '../api';

 interface VocabEntry {
@@ -29,11 +29,11 @@ interface VocabCard {
 }

 const colorClassFor = (color: string) => {
-  if (color === 'rose') return 'bg-rose-100 text-rose-950 border-rose-200';
-  if (color === 'sky') return 'bg-sky-100 text-sky-950 border-sky-200';
-  if (color === 'emerald') return 'bg-emerald-100 text-emerald-950 border-emerald-200';
-  if (color === 'violet') return 'bg-purple-100 text-purple-950 border-purple-200';
-  return 'bg-[#E8E4DE] text-[#2D2926] border-[#8B7E74]/30';
+  if (color === 'rose') return 'border-rose-300 text-rose-950';
+  if (color === 'sky') return 'border-sky-300 text-sky-950';
+  if (color === 'emerald') return 'border-emerald-300 text-emerald-950';
+  if (color === 'violet') return 'border-purple-300 text-purple-950';
+  return 'border-[#8B7E74]/40 text-[#2D2926]';
 };

 export const VocabCards: React.FC = () => {
@@ -67,17 +67,16 @@ export const VocabCards: React.FC = () => {
  }, []);

  return (
-    <div className="flex-1 overflow-y-auto bg-[#FAF9F6] px-2 py-3 lg:px-6 lg:pb-6">
+    <div className="flex-1 overflow-y-auto bg-[#F5F1EA] px-3 py-4 lg:px-8 lg:py-6">
      <div className="mx-auto max-w-5xl">
-        <div className="mb-3 flex items-center justify-between gap-3 rounded-xl border border-[#E8E4DE] bg-[#FDFCFB] px-4 py-3 shadow-sm">
+        <div className="mb-4 flex items-start justify-between gap-4 px-1">
          <div>
-            <div className="flex items-center gap-2 font-serif text-lg font-bold text-[#2D2926]">
-              <Layers3 className="h-5 w-5 text-[#8B7E74]" />
+            <div className="font-serif text-[clamp(1.7rem,3vw,2.3rem)] font-bold leading-tight tracking-wide text-[#2D2926]">
              {selectedCard ? selectedCard.text : '单词卡片'}
            </div>
            {!selectedCard && (
-              <div className="mt-1 text-xs text-[#A69F92]">
-                按词合并所有歌词注释
+              <div className="mt-1.5 text-sm text-[#8B7E74]">
+                {cards.length} 个词
              </div>
            )}
          </div>
@@ -85,77 +84,86 @@ export const VocabCards: React.FC = () => {
            <button
              type="button"
              onClick={() => setSelectedCard(null)}
-              className="flex items-center gap-1 rounded-full border border-[#E8E4DE] bg-white px-3 py-1.5 text-xs font-semibold text-[#8B7E74] hover:bg-[#FAF9F6]"
+              className="flex items-center gap-1 rounded-full bg-[#E8E1D8] px-3 py-1.5 text-sm font-semibold text-[#6F6258] active:bg-[#DCD2C7]"
            >
-              <ArrowLeft className="h-3.5 w-3.5" />
+              <ArrowLeft className="h-4 w-4" />
              返回
            </button>
-          ) : (
-            <div className="rounded-full bg-[#8B7E74]/10 px-3 py-1 text-xs font-semibold text-[#8B7E74]">
-              {cards.length} 词
-            </div>
-          )}
+          ) : null}
        </div>

        {status === 'loading' && (
-          <div className="rounded-xl border border-dashed border-[#E8E4DE] bg-[#FDFCFB] py-10 text-center text-sm text-[#A69F92]">
+          <div className="py-16 text-center text-sm text-[#8B7E74]">
            正在读取词库...
          </div>
        )}

        {status === 'error' && (
-          <div className="rounded-xl border border-rose-200 bg-rose-50 py-10 text-center text-sm text-rose-700">
+          <div className="py-16 text-center text-sm text-rose-700">
            词库读取失败
          </div>
        )}

        {status === 'ready' && cards.length === 0 && (
-          <div className="rounded-xl border border-dashed border-[#E8E4DE] bg-[#FDFCFB] py-10 text-center text-sm text-[#A69F92]">
+          <div className="rounded-2xl bg-[#FDFCFB] px-4 py-12 text-center text-sm text-[#8B7E74]">
            还没有单词卡片。给歌词添加注释后会自动出现在这里。
          </div>
        )}

        {status === 'ready' && selectedCard && (
-          <div className="space-y-3">
-            <div className={`rounded-xl border p-3 text-sm leading-relaxed ${colorClassFor(selectedCard.latestColor)}`}>
+          <div className="space-y-4">
+            <section className="rounded-2xl bg-[#FDFCFB] px-4 py-4">
+              <div className="mb-2 text-xs font-semibold text-[#8B7E74]">释义</div>
+              <div className={`border-l-4 pl-3 text-base leading-7 ${colorClassFor(selectedCard.latestColor)}`}>
                {selectedCard.latestComment || '无释义内容'}
              </div>
-
-            <div className="space-y-2">
-              {selectedCard.entries.map((entry, index) => (
-                <div
-                  key={`${entry.fileName}-${entry.lineNumber}-${index}`}
-                  className="rounded-xl border border-[#E8E4DE]/70 bg-white p-3 shadow-sm"
-                >
-                  <div className="mb-1 flex items-center gap-1.5 text-xs font-semibold text-[#8B7E74]">
-                    <BookOpen className="h-3.5 w-3.5" />
-                    {entry.documentTitle} · 行 {entry.lineNumber}
+              <div className="mt-3 text-xs leading-6 text-[#8B7E74]">
+                {selectedCard.noteCount} 条注释 / {selectedCard.documentTitles.length} 首歌词
              </div>
-                  <div className="text-sm leading-relaxed text-[#2D2926]">
+            </section>
+
+            <section className="overflow-hidden rounded-2xl bg-[#FDFCFB]">
+              <div className="px-4 py-3 text-xs font-semibold text-[#8B7E74]">出现位置</div>
+              <div className="divide-y divide-[#E8E4DE]">
+                {selectedCard.entries.map((entry, index) => (
+                  <section
+                    key={`${entry.fileName}-${entry.lineNumber}-${index}`}
+                    className="grid gap-2 px-4 py-3 md:grid-cols-[150px_minmax(0,1fr)] md:gap-5"
+                  >
+                    <div className="text-xs leading-5 text-[#8B7E74]">
+                      <div className="font-semibold text-[#2D2926]">{entry.documentTitle}</div>
+                      <div>行 {entry.lineNumber}</div>
+                    </div>
+                    <div>
+                      <div className="font-serif text-base leading-7 text-[#2D2926]">
                        {entry.lineText}
                      </div>
-                  <div className={`mt-2 rounded-lg border px-2 py-1.5 text-sm ${colorClassFor(entry.color)}`}>
+                      <div className={`mt-2 border-l-4 pl-3 text-sm leading-6 ${colorClassFor(entry.color)}`}>
                        {entry.comment}
                      </div>
                    </div>
+                  </section>
                ))}
              </div>
+            </section>
          </div>
        )}

        {status === 'ready' && !selectedCard && (
-          <div className="grid grid-cols-3 gap-1.5 sm:grid-cols-4 md:grid-cols-5 lg:grid-cols-6 xl:grid-cols-7">
+          <div className="rounded-2xl bg-[#FDFCFB] p-3">
+            <div className="grid grid-cols-2 gap-2 sm:grid-cols-3 md:grid-cols-4 lg:grid-cols-5">
            {cards.map((card) => (
              <button
                key={card.normalizedText}
                type="button"
                onClick={() => setSelectedCard(card)}
-                  className="min-h-14 rounded-xl border border-[#E8E4DE] bg-[#FDFCFB] px-2 py-2 text-center font-serif text-base font-bold leading-snug text-[#2D2926] shadow-sm transition hover:border-[#8B7E74]/50 hover:bg-white active:bg-[#E8E4DE]/30 sm:text-lg"
+                className="min-h-12 rounded-xl bg-[#F5F1EA] px-3 py-2 text-center font-serif text-[clamp(1rem,2vw,1.18rem)] font-semibold leading-tight tracking-wide text-[#2D2926] transition-colors hover:bg-[#EFE7DD] active:bg-[#E8E1D8]"
              >
                {card.text}
              </button>
            ))}
            </div>
+          </div>
        )}
      </div>
    </div>
@@ -0,0 +1,48 @@
+/**
+ * @license
+ * SPDX-License-Identifier: Apache-2.0
+ */
+
+export interface Verb {
+  dictionaryForm: string; // e.g. 思う
+  masuStemForm: string;   // e.g. 思い
+  kanji: string;          // e.g. 思う (if different, otherwise same)
+  reading: string;        // e.g. おもう
+  romaji: string;         // e.g. omou
+  meaning: string;        // e.g. 想、认为
+}
+
+export interface SuffixVerb {
+  id: string;             // e.g. "dasu"
+  kanji: string;          // e.g. 出す
+  reading: string;        // e.g. だす
+  meaning: string;        // e.g. 动作开始、突然发生、向外
+  description: string;    // Comprehensive explanation of what this suffix adds to a verb
+  exampleInEnglish: string;
+}
+
+export interface CompoundVerb {
+  id: string;             // Unique identifier, e.g., "omoidasu"
+  kanji: string;          // e.g. 思い出す
+  reading: string;        // e.g. おもいだす
+  romaji: string;         // e.g. omoidasu
+  prefix: Verb;           // The first verb (zenkou doushi)
+  suffix: SuffixVerb;     // The second verb (koukou doushi)
+  meaning: string;        // e.g. 想起、回忆起
+  jlpt: 'N3' | 'N2' | 'N1'; // JLPT Level
+  exampleSentence: {
+    japanese: string;     // e.g. 昔の友人の名前を思い出した。
+    reading: string;      // e.g. むかしのゆうじんのなまえをおもいだした。
+    translation: string;  // e.g. 我想起了昔日好友的名字。
+  };
+  notes?: string;         // Nuance or usage notes
+}
+
+export interface QuizQuestion {
+  id: string;
+  type: 'match' | 'fill_stem' | 'select_meaning';
+  compoundVerb: CompoundVerb;
+  options: string[];
+  correctAnswer: string;
+  prompt: string;
+}