diff --git a/README.md b/README.md
index 4327e99..7393a20 100644
--- a/README.md
+++ b/README.md
@@ -114,6 +114,7 @@ Oxfmt 不负责代码质量，Oxlint 不负责 Vue 的完整类型推导；Vue S
 - 拆解人物、场景、道具共用固定斑马纹列表：奇数行常驻原悬停灰底，偶数行保留次级底色，整行不随鼠标或键盘焦点变色；内部控件仍保留交互与焦点反馈，搜索后的条纹顺序按可见列表重新计算。此类记录（含剧本角色设定）首项同样保留 20px 内边距，主题切换时背景色使用 160ms 过渡，并遵循系统减少动态效果设置。
 - 拆解主体列表的搜索框统一靠左，图标使用 `NInput` 的 `prefix` 插槽；统计紧随输入框弱化显示，搜索时显示匹配数／总数，清空后恢复总数。搜索与统计垂直居中，窄内容区允许换行，不再左右分散。
 - 展开后的每个形态使用独立直角色块，与所在主体条纹采用相反的主题灰阶；保留 16px 内边距、12px 块间距和名称／默认标签间距，奇偶行及搜索重排后均可区分内外层，不新增悬停变色。
+- 拆解设置中“每组集数”和“抽取模块”使用相同标题间距；输入框、复选框与预览按钮对齐到 34px 控件行，模块说明独立放在下方。“集 / 组”保持单行，窄抽屉按实际内容宽度将操作和完整模块分组换行，校验与预览逻辑不变。
 - 窄屏默认收起侧栏，目录与正文改用紧凑布局；执行记录仍可查看。长弹窗在自身内部滚动。
 
 布局样式集中在 `src/admin.css`，业务排版保留在 `src/styles.css`。新增页面应使用 `WorkspacePage`（内容优先页开启 `compact`），低频操作使用 `WorkspaceTools`；避免通过 `body` 或 `window.scrollTo` 管理滚动。
diff --git a/src/admin.css b/src/admin.css
index 598fcc1..9221e43 100644
--- a/src/admin.css
+++ b/src/admin.css
@@ -343,6 +343,86 @@ body {
 .control-row-checkbox .n-checkbox-box-wrapper {
     align-self: center;
 }
+/* 拆解配置跟随抽屉实际宽度；标题 20px + 间距 8px，下方统一使用 34px 控件行。 */
+.breakdown-settings-panel {
+    container: breakdown-settings / inline-size;
+}
+.breakdown-config {
+    --breakdown-label-offset: 28px;
+    display: grid;
+    grid-template-columns: 180px minmax(0, 1fr) auto;
+    align-items: start;
+    gap: 16px 24px;
+}
+.breakdown-config .field-label {
+    margin: 0 0 8px;
+    padding: 0;
+    line-height: 20px;
+}
+.breakdown-group-field,
+.breakdown-modules-field,
+.breakdown-module-option {
+    min-width: 0;
+}
+.breakdown-group-input {
+    display: flex;
+    align-items: center;
+    gap: 12px;
+}
+.breakdown-group-number.n-input-number {
+    flex: 0 0 120px;
+    width: 120px;
+}
+.breakdown-group-unit {
+    flex-shrink: 0;
+    white-space: nowrap;
+    color: var(--app-muted);
+    font-size: 14px;
+}
+.breakdown-modules-field {
+    margin: 0;
+    padding: 0;
+    border: 0;
+}
+.breakdown-module-options {
+    display: grid;
+    grid-template-columns: repeat(3, minmax(0, 1fr));
+    gap: 12px 16px;
+}
+.breakdown-module-description {
+    margin: 4px 0 0;
+    padding-left: 24px;
+    color: var(--app-muted);
+    font-size: 11px;
+    line-height: 18px;
+    overflow-wrap: anywhere;
+}
+.breakdown-preview-button.n-button {
+    align-self: start;
+    margin-top: var(--breakdown-label-offset);
+    white-space: nowrap;
+}
+@container breakdown-settings (max-width: 780px) {
+    .breakdown-config {
+        grid-template-columns: 180px minmax(0, 1fr);
+    }
+    .breakdown-preview-button.n-button {
+        grid-column: 2;
+        justify-self: end;
+        margin-top: 0;
+    }
+}
+@container breakdown-settings (max-width: 560px) {
+    .breakdown-config {
+        grid-template-columns: minmax(0, 1fr);
+    }
+    .breakdown-module-options {
+        grid-template-columns: repeat(auto-fit, minmax(min(100%, 160px), 1fr));
+    }
+    .breakdown-preview-button.n-button {
+        grid-column: 1;
+    }
+}
 .workspace-tools-body .storyboard-coverage {
     margin-block: 20px;
 }
diff --git a/src/features/breakdown/BreakdownPage.test.ts b/src/features/breakdown/BreakdownPage.test.ts
index d54f464..5d16167 100644
--- a/src/features/breakdown/BreakdownPage.test.ts
+++ b/src/features/breakdown/BreakdownPage.test.ts
@@ -140,6 +140,58 @@ async function selectTab(label: string) {
 }
 
 describe('拆解页内容滚动', () => {
+    it('拆解设置保留输入标签、单行单位与模块说明，改版后仍校验模块和剧本状态', async () => {
+        const fetcher = vi.fn<typeof fetch>()
+        vi.stubGlobal('fetch', fetcher)
+        const provided = mountPage()
+        await wrapper!.get('[data-workspace-tools]').trigger('click')
+        await flushPromises()
+        const config = wrapper!.get('.breakdown-config')
+        expect(config.get('label[for="group-size"]').text()).toBe('每组集数')
+        expect(config.get<HTMLInputElement>('#group-size').element.value).toBe('3')
+        expect(config.get('.breakdown-group-unit').text()).toBe('集 / 组')
+        expect(config.get('fieldset > legend').text()).toBe('抽取模块')
+        const options = config.findAll('.breakdown-module-option')
+        expect(options).toHaveLength(3)
+        const preview = config.get<HTMLButtonElement>('.breakdown-preview-button')
+        expect(preview.element.disabled).toBe(false)
+        for (const option of options) {
+            const checkbox = option.get('[role="checkbox"]')
+            const description = option.get('.breakdown-module-description')
+            expect(checkbox.attributes('aria-describedby')).toBe(description.attributes('id'))
+            expect(checkbox.find('.breakdown-module-description').exists()).toBe(false)
+            expect(description.text()).not.toBe('')
+            await checkbox.trigger('click')
+        }
+        expect(preview.element.disabled).toBe(true)
+        expect(wrapper!.text()).toContain('至少选择一个抽取模块')
+        await options[1]!.get('[role="checkbox"]').trigger('click')
+        expect(preview.element.disabled).toBe(false)
+        provided.data.value!.project.status = 'generating'
+        await flushPromises()
+        expect(preview.element.disabled).toBe(true)
+        expect(fetcher).not.toHaveBeenCalled()
+    })
+
+    it('拆解配置按抽屉宽度换行，单位不收缩，三类控件对齐且说明位于控件下方', () => {
+        // DOM 环境不计算坐标，检查统一标题偏移、34px 控件行和容器断点契约。
+        const css = readFileSync('src/admin.css', 'utf8')
+        expect(css).toMatch(/\.breakdown-settings-panel\s*\{\s*container:\s*breakdown-settings \/ inline-size;/)
+        expect(css).toMatch(/\.breakdown-config\s*\{[^}]*--breakdown-label-offset:\s*28px;/)
+        expect(css).toMatch(/\.breakdown-config \.field-label\s*\{[^}]*margin:\s*0 0 8px;[^}]*line-height:\s*20px;/)
+        expect(css).toMatch(/\.breakdown-group-unit\s*\{[^}]*flex-shrink:\s*0;[^}]*white-space:\s*nowrap;/)
+        expect(css).toMatch(
+            /\.n-checkbox\.control-row-checkbox\s*\{[^}]*align-items:\s*center;[^}]*min-height:\s*34px;/
+        )
+        expect(css).toMatch(
+            /\.breakdown-preview-button\.n-button\s*\{[^}]*align-self:\s*start;[^}]*margin-top:\s*var\(--breakdown-label-offset\);/
+        )
+        expect(css).toContain('@container breakdown-settings (max-width: 780px)')
+        expect(css).toContain('@container breakdown-settings (max-width: 560px)')
+        expect(css).toContain('repeat(auto-fit, minmax(min(100%, 160px), 1fr))')
+        expect(readFileSync('src/styles.css', 'utf8')).not.toContain('.breakdown-config')
+    })
+
     it.each(['人物', '场景', '道具'])('%s 使用共用固定斑马纹样式，搜索后保持列表条目结构', async label => {
         mountPage()
         await selectTab(label)
diff --git a/src/features/breakdown/BreakdownPage.vue b/src/features/breakdown/BreakdownPage.vue
index 70b024f..967b736 100644
--- a/src/features/breakdown/BreakdownPage.vue
+++ b/src/features/breakdown/BreakdownPage.vue
@@ -155,7 +155,7 @@ function exportResult() {
                 </div>
                 <div v-if="project?.episodes.length" class="toolbar-actions">
                     <WorkspaceTools v-model:open="toolsOpen" title="拆解设置与恢复" label="拆解设置与恢复">
-                        <section class="panel p-5 lg:p-6">
+                        <section class="panel breakdown-settings-panel p-5 lg:p-6">
                             <div class="mb-5 flex flex-wrap items-start justify-between gap-3">
                                 <div>
                                     <h2 class="flex items-center gap-2 font-semibold"><Layers :size="17" />拆解设置</h2>
@@ -168,38 +168,46 @@ function exportResult() {
                                 <NTag size="small" :bordered="false">来源：正式剧集</NTag>
                             </div>
                             <div class="breakdown-config">
-                                <div>
+                                <div class="breakdown-group-field">
                                     <label class="field-label" for="group-size">每组集数</label>
-                                    <div class="flex items-center gap-3">
+                                    <div class="breakdown-group-input">
                                         <NInputNumber
                                             :disabled="operation.pending"
                                             :input-props="{ id: 'group-size' }"
-                                            class="w-24"
+                                            class="breakdown-group-number"
                                             :value="typeof groupSize === 'number' ? groupSize : null"
                                             @update:value="groupSize = $event ?? 0"
                                             :min="1"
                                             :step="1"
                                         ></NInputNumber
-                                        ><span class="text-sm text-muted">集 / 组</span>
+                                        ><span class="breakdown-group-unit">集 / 组</span>
                                     </div>
                                 </div>
-                                <fieldset class="flex flex-wrap gap-5 border-0 p-0">
-                                    <legend class="field-label mb-3">抽取模块</legend>
-                                    <NCheckbox
-                                        :checked="modules.includes(option.value)"
-                                        :disabled="operation.pending"
-                                        :aria-label="option.label"
-                                        @update:checked="toggleModule(option.value, $event)"
-                                        v-for="option in moduleOptions"
-                                        :key="option.value"
-                                        class="flex cursor-pointer items-start gap-2.5"
-                                        ><span
-                                            ><span class="block text-sm font-medium">{{ option.label }}</span
-                                            ><span class="mt-1 block text-[11px] text-muted">{{
-                                                option.description
-                                            }}</span></span
-                                        ></NCheckbox
-                                    >
+                                <fieldset class="breakdown-modules-field">
+                                    <legend class="field-label">抽取模块</legend>
+                                    <div class="breakdown-module-options">
+                                        <div
+                                            v-for="option in moduleOptions"
+                                            :key="option.value"
+                                            class="breakdown-module-option"
+                                        >
+                                            <NCheckbox
+                                                :checked="modules.includes(option.value)"
+                                                :disabled="operation.pending"
+                                                :aria-label="option.label"
+                                                :aria-describedby="`breakdown-module-${option.value}-help`"
+                                                @update:checked="toggleModule(option.value, $event)"
+                                                class="control-row-checkbox"
+                                                ><span class="text-sm font-medium">{{ option.label }}</span></NCheckbox
+                                            >
+                                            <p
+                                                :id="`breakdown-module-${option.value}-help`"
+                                                class="breakdown-module-description"
+                                            >
+                                                {{ option.description }}
+                                            </p>
+                                        </div>
+                                    </div>
                                 </fieldset>
                                 <NButton
                                     :disabled="
@@ -210,7 +218,7 @@ function exportResult() {
                                         !!error
                                     "
                                     @click="loadPreview"
-                                    class="self-end"
+                                    class="breakdown-preview-button"
                                     ><LoaderCircle v-if="previewBusy" :size="14" class="animate-spin" />预览分组
                                 </NButton>
                             </div>
diff --git a/src/styles.css b/src/styles.css
index 261b408..664edde 100644
--- a/src/styles.css
+++ b/src/styles.css
@@ -621,13 +621,6 @@
             monospace;
     }
 
-    .breakdown-config {
-        display: grid;
-        grid-template-columns: 145px minmax(0, 1fr) auto;
-        align-items: start;
-        gap: 28px;
-    }
-
     .group-preview {
         margin-top: 24px;
         padding-top: 20px;
@@ -735,15 +728,6 @@
     .history-panel {
         border-left: 0;
     }
-
-    .breakdown-config {
-        grid-template-columns: 120px minmax(0, 1fr);
-        gap: 20px;
-    }
-    .breakdown-config > button {
-        grid-column: 1 / -1;
-        justify-self: start;
-    }
 }
 @media (max-width: 760px) {
     .storyboard-controls {
@@ -771,10 +755,6 @@
         font-size: 23px;
     }
 
-    .breakdown-config {
-        grid-template-columns: minmax(0, 1fr);
-    }
-
     .stage-strip {
         gap: 9px;
     }