diff --git a/src/components/layout/Sidebar.tsx b/src/components/layout/Sidebar.tsx
index 291c4a3..55f5c56 100644
--- a/src/components/layout/Sidebar.tsx
+++ b/src/components/layout/Sidebar.tsx
@@ -18,10 +18,10 @@ const navItems = [
   { path: '/', label: '首页', icon: Home },
   { path: '/process-matrix', label: '49过程矩阵', icon: LayoutGrid },
   { path: '/process-practice', label: '过程背诵练习', icon: GraduationCap },
-  { path: '/principles', label: '十二项原则', icon: BookMarked },
   { path: '/knowledge-areas', label: '知识领域', icon: BookOpen },
   { path: '/process-groups', label: '过程组', icon: Layers },
   { path: '/process-graph', label: '过程关系图', icon: Share2 },
+  { path: '/principles', label: '十二项原则', icon: BookMarked },
   { path: '/settings', label: '设置', icon: Settings },
 ]
 
diff --git a/src/data/changelog.json b/src/data/changelog.json
index 4b44fe0..48cd153 100644
--- a/src/data/changelog.json
+++ b/src/data/changelog.json
@@ -1,5 +1,12 @@
 {
   "changelogEntries": [
+    {
+      "id": "2026-03-18-principles-layout-fix",
+      "date": "2026-03-18",
+      "type": "fix",
+      "title": "修复十二项原则布局（sticky结构）、格子配色及菜单位置",
+      "scope": "整合"
+    },
     {
       "id": "2026-03-18-principles-page",
       "date": "2026-03-18",
diff --git a/src/pages/PrinciplesPage.tsx b/src/pages/PrinciplesPage.tsx
index bd4c906..7dfe47e 100644
--- a/src/pages/PrinciplesPage.tsx
+++ b/src/pages/PrinciplesPage.tsx
@@ -413,208 +413,213 @@ export default function PrinciplesPage() {
 
   // ─── 渲染 ─────────────────────────────────────────────────────
   return (
-    <div className="min-h-screen bg-slate-50 px-4 py-8 dark:bg-slate-900">
-      <div className="mx-auto max-w-7xl space-y-6">
+    // 与 ProcessPracticePage 保持相同的 flex-col 布局结构
+    <div className="min-h-screen bg-gray-50 dark:bg-gray-900 flex flex-col">
 
-        {/* 标题栏 */}
-        <div className="flex flex-col gap-4 sm:flex-row sm:items-center sm:justify-between">
-          <div>
-            <p className="text-xs font-semibold uppercase tracking-widest text-blue-600 dark:text-blue-400">
-              PMBOK 第七版
-            </p>
-            <h1 className="mt-1 text-2xl font-bold text-slate-900 dark:text-white">
+      {/* 顶部粘性区：标题 + 进度条 */}
+      <div className="sticky top-0 z-20 bg-white dark:bg-gray-800 shadow-sm">
+        <div className="max-w-7xl mx-auto px-4 py-3">
+          <div className="flex items-center justify-between mb-2">
+            <h1 className="text-xl font-bold text-gray-900 dark:text-gray-100">
               十二项原则
             </h1>
-          </div>
-
-          <div className="flex items-center gap-3">
-            {isPracticeMode && (
-              <button
-                type="button"
-                onClick={resetPractice}
-                className="rounded-lg border border-slate-200 px-3 py-1.5 text-sm text-slate-600 transition-colors hover:border-red-300 hover:text-red-600 dark:border-slate-600 dark:text-slate-300 dark:hover:text-red-400"
-              >
-                重置进度
-              </button>
-            )}
-            <div className="flex rounded-xl bg-slate-100 p-1 dark:bg-slate-800">
-              <button
-                type="button"
-                onClick={() => setIsPracticeMode(false)}
-                className={clsx(
-                  'rounded-lg px-4 py-1.5 text-sm font-medium transition-colors',
-                  !isPracticeMode
-                    ? 'bg-white text-slate-900 shadow-sm dark:bg-slate-700 dark:text-white'
-                    : 'text-slate-500 hover:text-slate-700 dark:text-slate-400 dark:hover:text-slate-200'
-                )}
-              >
-                查看
-              </button>
-              <button
-                type="button"
-                onClick={() => setIsPracticeMode(true)}
-                className={clsx(
-                  'rounded-lg px-4 py-1.5 text-sm font-medium transition-colors',
-                  isPracticeMode
-                    ? 'bg-white text-slate-900 shadow-sm dark:bg-slate-700 dark:text-white'
-                    : 'text-slate-500 hover:text-slate-700 dark:text-slate-400 dark:hover:text-slate-200'
-                )}
-              >
-                练习
-              </button>
+            <div className="flex items-center gap-3">
+              {isPracticeMode && (
+                <>
+                  <span className="text-sm text-gray-600 dark:text-gray-400">
+                    进度：{answeredCount} / {principles.length}
+                  </span>
+                  <button
+                    type="button"
+                    onClick={resetPractice}
+                    className="text-xs px-2 py-1 text-gray-500 dark:text-gray-400 hover:text-red-600 dark:hover:text-red-400 transition-colors"
+                  >
+                    清除进度
+                  </button>
+                </>
+              )}
+              <div className="flex rounded-lg bg-gray-100 dark:bg-gray-700 p-0.5">
+                <button
+                  type="button"
+                  onClick={() => setIsPracticeMode(false)}
+                  className={clsx(
+                    'rounded-md px-3 py-1 text-sm font-medium transition-colors',
+                    !isPracticeMode
+                      ? 'bg-white dark:bg-gray-600 text-gray-900 dark:text-white shadow-sm'
+                      : 'text-gray-500 dark:text-gray-400 hover:text-gray-700 dark:hover:text-gray-200'
+                  )}
+                >
+                  查看
+                </button>
+                <button
+                  type="button"
+                  onClick={() => setIsPracticeMode(true)}
+                  className={clsx(
+                    'rounded-md px-3 py-1 text-sm font-medium transition-colors',
+                    isPracticeMode
+                      ? 'bg-white dark:bg-gray-600 text-gray-900 dark:text-white shadow-sm'
+                      : 'text-gray-500 dark:text-gray-400 hover:text-gray-700 dark:hover:text-gray-200'
+                  )}
+                >
+                  练习
+                </button>
+              </div>
             </div>
           </div>
-        </div>
-
-        {/* 进度条 */}
-        {isPracticeMode && (
-          <div className="flex items-center gap-3">
-            <div className="h-2 flex-1 rounded-full bg-slate-200 dark:bg-slate-700">
+          {isPracticeMode && (
+            <div className="w-full bg-gray-200 dark:bg-gray-700 rounded-full h-2">
               <div
-                className="h-2 rounded-full bg-blue-500 transition-all duration-300"
+                className="bg-blue-500 h-2 rounded-full transition-all duration-300"
                 style={{ width: `${(answeredCount / principles.length) * 100}%` }}
               />
             </div>
-            <span className="whitespace-nowrap text-sm text-slate-500 dark:text-slate-400">
-              {answeredCount} / {principles.length}
-            </span>
-          </div>
-        )}
+          )}
+        </div>
+      </div>
+
+      {/* 中间可滚动区：原则表格 */}
+      <div className="flex-1 overflow-y-auto">
+        <div className="max-w-7xl mx-auto py-4 px-4">
+          <div className="overflow-x-auto">
+            <table className="min-w-[720px] w-full border-collapse">
+              <thead>
+                <tr>
+                  {principleGroups.map((group) => (
+                    <th
+                      key={group.id}
+                      className="bg-blue-700 px-4 py-3 text-center text-base font-bold text-white dark:bg-blue-800"
+                    >
+                      {group.label}
+                    </th>
+                  ))}
+                </tr>
+              </thead>
+              <tbody>
+                {[0, 1, 2, 3].map((rowIdx) => (
+                  <tr key={rowIdx}>
+                    {principleGroups.map((group) => {
+                      const principle = group.items[rowIdx]
+                      if (!principle) {
+                        return (
+                          <td
+                            key={`${group.id}-empty`}
+                            className="border border-gray-200 dark:border-gray-700 bg-white dark:bg-gray-800"
+                          />
+                        )
+                      }
+
+                      const isAnswered = !!answeredCells.get(principle.id)
+                      const isCurrent =
+                        isPracticeMode && principle.id === currentPrincipleId
+                      const isShowingAnswer =
+                        showAnswerForCell?.principleId === principle.id
 
-        {/* 原则表格 */}
-        <div className="overflow-x-auto rounded-2xl shadow-sm ring-1 ring-slate-200 dark:ring-slate-700">
-          <table className="min-w-[840px] w-full border-collapse">
-            <thead>
-              <tr>
-                {principleGroups.map((group) => (
-                  <th
-                    key={group.id}
-                    className="bg-blue-700 px-4 py-3 text-center text-base font-bold text-white dark:bg-blue-800"
-                  >
-                    {group.label}
-                  </th>
-                ))}
-              </tr>
-            </thead>
-            <tbody>
-              {[0, 1, 2, 3].map((rowIdx) => (
-                <tr key={rowIdx} className="divide-x divide-slate-100 dark:divide-slate-700">
-                  {principleGroups.map((group) => {
-                    const principle = group.items[rowIdx]
-                    if (!principle) {
                       return (
                         <td
-                          key={`${group.id}-empty`}
-                          className="bg-white dark:bg-slate-800"
-                        />
-                      )
-                    }
+                          key={principle.id}
+                          className="border border-gray-200 dark:border-gray-700 p-0 align-top"
+                        >
+                          <div className="flex min-h-[72px]">
+                            {/* 原则名称列 */}
+                            {isPracticeMode ? (
+                              <button
+                                type="button"
+                                data-principle-id={principle.id}
+                                onClick={() => switchToPrinciple(principle)}
+                                onPointerDown={() => handlePointerDown(principle.id)}
+                                onPointerUp={handlePointerUp}
+                                onPointerLeave={handlePointerUp}
+                                onPointerCancel={handlePointerUp}
+                                tabIndex={isCurrent ? 0 : -1}
+                                aria-current={isCurrent ? 'step' : undefined}
+                                aria-label={`原则：${principle.name}`}
+                                className={clsx(
+                                  'relative flex w-32 shrink-0 items-center justify-center',
+                                  'border-r border-2 cursor-pointer transition-all duration-200 focus:outline-none',
+                                  'border-r-gray-200 dark:border-r-gray-700',
+                                  isAnswered
+                                    ? 'bg-white dark:bg-gray-800 border-solid border-gray-300 dark:border-gray-600'
+                                    : 'border-dashed border-gray-300 dark:border-gray-600',
+                                  isCurrent && 'ring-2 ring-blue-500 border-blue-500',
+                                  !isAnswered && 'min-h-[40px]'
+                                )}
+                              >
+                                {isAnswered && (
+                                  <span className="px-2 text-xs font-semibold text-gray-900 dark:text-gray-100 text-center leading-snug">
+                                    {principle.name}
+                                  </span>
+                                )}
+                                {isShowingAnswer && (
+                                  <div className="absolute inset-0 flex items-center justify-center bg-black/80 rounded z-10">
+                                    <span className="text-white text-sm font-medium px-2 text-center">
+                                      {showAnswerForCell.answer}
+                                    </span>
+                                  </div>
+                                )}
+                              </button>
+                            ) : (
+                              <div className="flex w-32 shrink-0 items-center justify-center bg-blue-700 px-2 py-3 text-center text-sm font-bold leading-snug text-white dark:bg-blue-800">
+                                {principle.name}
+                              </div>
+                            )}
 
-                    const isAnswered = !!answeredCells.get(principle.id)
-                    const isCurrent =
-                      isPracticeMode && principle.id === currentPrincipleId
-                    const isShowingAnswer =
-                      showAnswerForCell?.principleId === principle.id
-
-                    return (
-                      <td key={principle.id} className="p-0 align-top">
-                        <div className="flex min-h-[80px]">
-                          {/* 原则名称列 */}
-                          {isPracticeMode ? (
-                            <button
-                              type="button"
-                              data-principle-id={principle.id}
-                              onClick={() => switchToPrinciple(principle)}
-                              onPointerDown={() => handlePointerDown(principle.id)}
-                              onPointerUp={handlePointerUp}
-                              onPointerLeave={handlePointerUp}
-                              onPointerCancel={handlePointerUp}
-                              tabIndex={isCurrent ? 0 : -1}
-                              aria-current={isCurrent ? 'step' : undefined}
-                              className={clsx(
-                                'relative flex w-36 shrink-0 items-center justify-center border-r px-2 py-3 text-center text-sm font-semibold transition-all focus:outline-none',
-                                'border-slate-100 dark:border-slate-700',
-                                isAnswered &&
-                                  'bg-green-600 text-white',
-                                !isAnswered &&
-                                  !isCurrent &&
-                                  'bg-blue-700 text-blue-300 opacity-40 dark:bg-blue-800',
-                                isCurrent &&
-                                  !isAnswered &&
-                                  'bg-amber-400 text-amber-900 ring-2 ring-inset ring-amber-500',
-                                isCurrent &&
-                                  isAnswered &&
-                                  'bg-green-600 text-white ring-2 ring-inset ring-amber-500'
-                              )}
-                            >
-                              <span className="leading-snug">
-                                {isAnswered
-                                  ? principle.name
-                                  : isCurrent
-                                  ? '作答中…'
-                                  : '　　'}
-                              </span>
-                              {isShowingAnswer && (
-                                <div className="absolute inset-0 z-10 flex items-center justify-center bg-black/80 px-2 text-sm font-bold text-white">
-                                  {showAnswerForCell.answer}
-                                </div>
-                              )}
-                            </button>
-                          ) : (
-                            <div className="flex w-36 shrink-0 items-center justify-center bg-blue-700 px-2 py-3 text-center text-sm font-bold leading-snug text-white dark:bg-blue-800">
-                              {principle.name}
+                            {/* 描述列 */}
+                            <div className="flex flex-1 items-center bg-white px-4 py-3 dark:bg-gray-800">
+                              <p className="text-sm leading-relaxed text-gray-700 dark:text-gray-200">
+                                {principle.description}
+                              </p>
                             </div>
-                          )}
-
-                          {/* 描述列 */}
-                          <div className="flex flex-1 items-center bg-white px-4 py-3 dark:bg-slate-800">
-                            <p className="text-sm leading-relaxed text-slate-700 dark:text-slate-200">
-                              {principle.description}
-                            </p>
                           </div>
-                        </div>
-                      </td>
-                    )
-                  })}
-                </tr>
-              ))}
-            </tbody>
-          </table>
-        </div>
-
-        {/* 练习输入区 */}
-        {isPracticeMode && currentPrinciple && (
-          <div className="rounded-2xl bg-white p-6 shadow-sm ring-1 ring-slate-200 dark:bg-slate-800 dark:ring-slate-700">
-            <div className="mb-5 border-b border-slate-100 pb-5 dark:border-slate-700">
-              <p className="text-xs font-semibold uppercase tracking-widest text-blue-600 dark:text-blue-400">
-                当前提示 · {currentPrinciple.categoryId === 'people' ? '人' : currentPrinciple.categoryId === 'environment' ? '环境' : '事'}
-              </p>
-              <p className="mt-2 text-lg font-semibold text-slate-900 dark:text-white">
-                {currentPrinciple.description}
-              </p>
-            </div>
-
-            <div className="flex justify-center">
-              <InputArea
-                userInput={userInput}
-                charStatuses={charStatuses}
-                isComposing={isComposing}
-                inputLocked={inputLocked}
-                lastErrorTimestamp={lastErrorTimestamp}
-                onInputChange={handleInputChange}
-                onCompositionStart={handleCompositionStart}
-                onCompositionEnd={handleCompositionEnd}
-                onPaste={handlePaste}
-              />
-            </div>
-
-            <p className="mt-5 text-center text-xs text-slate-400 dark:text-slate-500">
-              长按单元格 / Ctrl+H 查看答案 · Tab / Shift+Tab 切换题目 · Esc 清空输入
-            </p>
+                        </td>
+                      )
+                    })}
+                  </tr>
+                ))}
+              </tbody>
+            </table>
           </div>
-        )}
+        </div>
       </div>
 
+      {/* 底部粘性区：练习输入（与 ProcessPracticePage 结构一致） */}
+      {isPracticeMode && currentPrinciple && (
+        <div className="sticky bottom-0 bg-white/60 dark:bg-gray-800/60 backdrop-blur-md border-t border-gray-200 dark:border-gray-700 z-10 pb-8">
+          <div className="max-w-7xl mx-auto px-6">
+            <div className="py-3 border-b border-gray-200/50 dark:border-gray-700/50">
+              <div className="flex items-center justify-center gap-3">
+                <InputArea
+                  userInput={userInput}
+                  charStatuses={charStatuses}
+                  isComposing={isComposing}
+                  inputLocked={inputLocked}
+                  lastErrorTimestamp={lastErrorTimestamp}
+                  onInputChange={handleInputChange}
+                  onCompositionStart={handleCompositionStart}
+                  onCompositionEnd={handleCompositionEnd}
+                  onPaste={handlePaste}
+                />
+                <button
+                  type="button"
+                  onClick={() => currentPrincipleId && handleLongPress(currentPrincipleId)}
+                  className="p-2 text-gray-500 dark:text-gray-400 hover:text-blue-600 dark:hover:text-blue-400 transition-colors"
+                  title="查看答案（长按格子也可以）"
+                >
+                  <svg className="w-5 h-5" fill="none" stroke="currentColor" viewBox="0 0 24 24">
+                    <path strokeLinecap="round" strokeLinejoin="round" strokeWidth={2} d="M13 16h-1v-4h-1m1-4h.01M21 12a9 9 0 11-18 0 9 9 0 0118 0z" />
+                  </svg>
+                </button>
+              </div>
+            </div>
+            <div className="py-3 text-center text-xs text-gray-500 dark:text-gray-400">
+              {currentPrinciple.description}
+              <span className="ml-3 text-gray-400 dark:text-gray-500">
+                · 长按格子 / Ctrl+H 查看答案 · Tab 切换
+              </span>
+            </div>
+          </div>
+        </div>
+      )}
+
       {/* 无障碍播报区 */}
       <div
         id="aria-live-region"