diff --git a/src/views/gh/improvementProposal/components/ImprovementProposalBPMForm.vue b/src/views/gh/improvementProposal/components/ImprovementProposalBPMForm.vue
index 350f4ea..e546079 100644
--- a/src/views/gh/improvementProposal/components/ImprovementProposalBPMForm.vue
+++ b/src/views/gh/improvementProposal/components/ImprovementProposalBPMForm.vue
@@ -46,7 +46,7 @@
 
           <template v-if="isTask('Task_improve002')">
             <a-form-item label="我的评分">
-              <a-descriptions bordered size="small" :column="2">
+              <a-descriptions bordered size="small" :column="1">
                 <a-descriptions-item label="评分状态">{{ scoreStatusLabel }}</a-descriptions-item>
                 <a-descriptions-item label="加权总分">{{ currentScore?.totalScore ?? '-' }}</a-descriptions-item>
                 <a-descriptions-item label="评分时间" :span="2">{{ formatDateTime(currentScore?.scoreTime) }}</a-descriptions-item>
@@ -59,13 +59,15 @@
 
           <template v-if="isTask('Task_improve003')">
             <a-form-item label="初步评定奖项">{{ awardLabel(proposal.initialAward) }}</a-form-item>
-            <a-form-item v-if="proposal.needDeptScore === '1'" label="部门评议结果">
-              平均分：{{ proposal.deptAvgScore ?? '-' }}；系统建议奖项：{{ awardLabel(proposal.suggestedAward) }}
+            <a-form-item v-if="proposal.needDeptScore === '1'" label="部门评议小组打分结果">
+              平均分：{{ proposal.deptAvgScore ?? '-' }}；建议奖项：{{ awardLabel(proposal.suggestedAward) }}
             </a-form-item>
             <a-form-item label="负责人确认奖项" required>
-              <a-radio-group v-model:value="leaderFinalAward">
-                <a-radio v-for="item in awardOptions" :key="item.value" :value="item.value">{{ item.label }}</a-radio>
+              <a-radio-group v-if="leaderAwardBase" v-model:value="leaderFinalAward">
+                <a-radio v-for="item in leaderAwardOptions" :key="item.value" :value="item.value">{{ item.label }}</a-radio>
               </a-radio-group>
+              <div v-if="leaderAwardBase" class="form-help">评定基准：{{ awardLabel(leaderAwardBase) }}，仅可选择当前档位或降档奖项。</div>
+              <div v-else class="form-help">部门评议建议奖项尚未生成，暂不能确认负责人奖项。</div>
             </a-form-item>
           </template>
 
@@ -109,8 +111,9 @@
         />
       </template>
 
-      <a-modal v-model:open="scoreModalVisible" title="部门评议打分" :footer="null" :mask-closable="false">
+      <a-modal v-model:open="scoreModalVisible" title="部门评议打分" :footer="null" :mask-closable="false" :body-style="{ padding: '24px 28px 20px' }">
         <a-form layout="vertical">
+          <a-alert class="score-range-alert" type="info" show-icon message="所有评分项均须填写 0-100 分，最多可保留两位小数。" />
           <a-row :gutter="12">
             <a-col :span="24">
               <a-form-item label="改善效果（权重 50%）" required>
@@ -237,6 +240,15 @@
     if (values.some((value) => value === undefined || value === null)) return '-';
     return (values.reduce((sum, value) => sum + Number(value), 0) / values.length).toFixed(2);
   });
+  // 部门评分完成后必须以系统建议奖项为基准，不能回退到初审奖项。
+  const leaderAwardBase = computed(() => {
+    const award = proposal.value.needDeptScore === '1' ? proposal.value.suggestedAward : proposal.value.initialAward;
+    return awardOptions.some((item) => item.value === String(award)) ? String(award) : '';
+  });
+  const leaderAwardOptions = computed(() => {
+    if (!leaderAwardBase.value) return [];
+    return awardOptions.filter((item) => Number(item.value) >= Number(leaderAwardBase.value));
+  });
   const currentVote = computed(() => voteRows.value.find((item) => String(item.voterId) === currentUserId.value));
 
   watch(
@@ -297,10 +309,18 @@
         await submitDeptScore(actionPayload());
       }
       if (isTask('Task_improve003')) {
+        if (!leaderAwardBase.value) {
+          createMessage.warning('部门评议建议奖项尚未生成，不能确认负责人奖项');
+          return false;
+        }
         if (!leaderFinalAward.value) {
           createMessage.warning('请选择负责人确认奖项');
           return false;
         }
+        if (!leaderAwardOptions.value.some((item) => item.value === leaderFinalAward.value)) {
+          createMessage.warning('负责人确认奖项只能选择当前档位或降档奖项');
+          return false;
+        }
         await saveLeaderAward(actionPayload({ leaderFinalAward: leaderFinalAward.value }));
       }
       if (isTask('Task_improve005') && currentVote.value?.voteStatus !== 'voted') {
@@ -358,6 +378,7 @@
     try {
       await saveDeptScore(actionPayload(scoreForm.value));
       createMessage.success('评分保存成功，可在流程提交前继续修改');
+      scoreModalVisible.value = false;
       await loadProposal();
     } catch (error: any) {
       createMessage.warning(error?.message || '评分保存失败');
@@ -452,6 +473,10 @@
     font-size: 12px;
   }
 
+  .score-range-alert {
+    margin-bottom: 16px;
+  }
+
   @media (max-width: 768px) {
     .attachment-grid {
       grid-template-columns: 1fr;