diff --git a/backend/apps/pisadmin/miscprocurement/models.py b/backend/apps/pisadmin/miscprocurement/models.py
index fe6bc61..691998a 100644
--- a/backend/apps/pisadmin/miscprocurement/models.py
+++ b/backend/apps/pisadmin/miscprocurement/models.py
@@ -710,7 +710,7 @@ class MiscLowPriceHeader(CoreModel):
         max_length=100,
         db_column="ItemNo",
         verbose_name="项次名",
-        help_text="如：铝等项次名称",
+        help_text="根据成本类别获取询价单对应子表数据行，材料类别 - 材料成本的产品料号 part_id, 加工类别 - 加工工站 process_station",
     )
     min_price = models.CharField(
         max_length=10,
diff --git a/backend/apps/pisadmin/miscprocurement/serializers.py b/backend/apps/pisadmin/miscprocurement/serializers.py
index f32dc16..be4ce81 100644
--- a/backend/apps/pisadmin/miscprocurement/serializers.py
+++ b/backend/apps/pisadmin/miscprocurement/serializers.py
@@ -267,7 +267,7 @@ class MiscPartCreateUpdateSerializer(CustomModelSerializer):
 
 
 class MiscLowPriceHeaderSerializer(CustomModelSerializer):
-    """比价-制程最低价记录主表"""
+    """比价-制程最低价记录主表（采购端「确认比价」时由 InquiryViewSet.confirm_negotiation 写入）。"""
 
     class Meta:
         model = MiscLowPriceHeader
@@ -283,7 +283,7 @@ class MiscLowPriceHeaderSerializer(CustomModelSerializer):
 
 
 class MiscLowPriceDetailSerializer(CustomModelSerializer):
-    """比价-制程最低价记录次表"""
+    """比价-制程最低价记录次表（材料规格下重量/单价最小值；与 confirm_negotiation 同步写入）。"""
 
     class Meta:
         model = MiscLowPriceDetail
@@ -1029,6 +1029,11 @@ class InquirySerializer(CustomModelSerializer):
     rfq_items = InquiryRfqItemSerializer(many=True, required=False)
     # 列表/详情展示：company_code → 公司信息简称（同请求内按代码缓存）
     company_short_name = serializers.SerializerMethodField(read_only=True)
+    # 上阶物料首行：与 misc_rfq_items 一致，供列表/比价弹窗回显采购件料号、名称（主表无独立字段）
+    part_no = serializers.SerializerMethodField(read_only=True)
+    part_name = serializers.SerializerMethodField(read_only=True)
+    # 税率：优先上阶物料行 tax_rate，否则同料号税费利润行（proc_inquiry_profit_cost.tax_rate）
+    tax_rate = serializers.SerializerMethodField(read_only=True)
     bid_start_time = serializers.DateTimeField(
         format="%Y-%m-%d %H:%M:%S",
         required=False,
@@ -1054,6 +1059,53 @@ class InquirySerializer(CustomModelSerializer):
             cache[code] = short or code
         return cache[code]
 
+    def _first_rfq_item(self, obj: Inquiry):
+        qs = getattr(obj, "rfq_items", None)
+        if qs is None:
+            return None
+        return qs.order_by("id").first()
+
+    def get_part_no(self, obj):
+        item = self._first_rfq_item(obj)
+        if not item:
+            return ""
+        v = getattr(item, "part_id", None)
+        return "" if v is None else str(v).strip()
+
+    def get_part_name(self, obj):
+        item = self._first_rfq_item(obj)
+        if not item:
+            return ""
+        v = getattr(item, "product_name", None)
+        return "" if v is None else str(v).strip()
+
+    def _profit_cost_for_first_part(self, obj: Inquiry):
+        """首条上阶物料对应料号的税费利润行；无料号时取首条利润行。"""
+        rfq = self._first_rfq_item(obj)
+        qs = getattr(obj, "profit_costs", None)
+        if qs is None:
+            return None
+        if rfq:
+            pid = getattr(rfq, "part_id", None)
+            if pid is not None and str(pid).strip() != "":
+                row = qs.filter(part_id=pid).order_by("id").first()
+                if row:
+                    return row
+        return qs.order_by("id").first()
+
+    def get_tax_rate(self, obj):
+        item = self._first_rfq_item(obj)
+        if item:
+            v = getattr(item, "tax_rate", None)
+            if v is not None and str(v).strip() != "":
+                return str(v).strip()
+        pc = self._profit_cost_for_first_part(obj)
+        if pc:
+            v = getattr(pc, "tax_rate", None)
+            if v is not None and str(v).strip() != "":
+                return str(v).strip()
+        return ""
+
     def to_internal_value(self, data):
         if hasattr(data, "copy"):
             data = data.copy()
diff --git a/backend/apps/pisadmin/miscprocurement/views.py b/backend/apps/pisadmin/miscprocurement/views.py
index d3a5c59..f308e44 100644
--- a/backend/apps/pisadmin/miscprocurement/views.py
+++ b/backend/apps/pisadmin/miscprocurement/views.py
@@ -1,3 +1,5 @@
+import logging
+from collections import defaultdict
 from decimal import Decimal
 
 from django.db import transaction
@@ -25,6 +27,9 @@ from apps.pissupplier.models import (
     QuotationItem,
 )
 
+logger = logging.getLogger(__name__)
+
+
 from .models import (
     MiscProcurementMaterialInfo,
     MiscProcurementStationInfo,
@@ -84,6 +89,155 @@ def _negotiation_totals_from_quotation_item(quotation_no: str, part_id: str):
     return item.total_price_excl_tax, item.total_price_incl_tax
 
 
+def _clip_price_str(value, max_len: int = 10) -> str:
+    s = str(value).strip() if value is not None else ""
+    return s[:max_len]
+
+
+def _clip_field(value, max_len: int) -> str:
+    return str(value or "").strip()[:max_len]
+
+
+def _sync_misc_low_price_records(inquiry: Inquiry, part_id: str) -> None:
+    """
+    确认比价时：按当前询价单下各供应商报价单，汇总材料/加工/包装/运输的「制程最低价」，
+    写入 MiscLowPriceHeader；材料规格下重量、单价的最小值写入 MiscLowPriceDetail（与次表设计一致）。
+    """
+    inquiry_no = (inquiry.inquiry_no or "").strip()
+    part_id = (part_id or "").strip()
+    if not inquiry_no or not part_id:
+        return
+
+    qn_active = QuotationMaster.objects.filter(inquiry_no=inquiry_no).exclude(status=4)
+    qn_list = list(qn_active.values_list("quotation_no", flat=True))
+    if not qn_list:
+        return
+
+    souce_ref = inquiry_no[:20]
+
+    MiscLowPriceHeader.objects.filter(inquiry_no=inquiry_no, part_id=part_id).delete()
+    MiscLowPriceDetail.objects.filter(inquiry_no=inquiry_no, part_id=part_id).delete()
+
+    # —— 主表：材料行（按材料规格）——
+    materials = QuotationMaterial.objects.filter(quotation_no__in=qn_list, part_id=part_id)
+    by_spec: dict[str, list] = defaultdict(list)
+    for m in materials:
+        spec = (m.material_spec or "").strip() or "材料"
+        by_spec[spec].append(m)
+
+    for spec, rows in by_spec.items():
+        costs = []
+        for r in rows:
+            if r.material_cost is not None:
+                try:
+                    costs.append(Decimal(str(r.material_cost)))
+                except Exception:
+                    continue
+        if costs:
+            MiscLowPriceHeader.objects.create(
+                inquiry_no=inquiry_no,
+                part_id=part_id,
+                souce_no=souce_ref or None,
+                cost_type="1",
+                item_no=_clip_field(spec, 100),
+                min_price=_clip_price_str(min(costs)),
+            )
+
+        weights = []
+        unit_prices = []
+        for r in rows:
+            if r.weight is not None:
+                try:
+                    weights.append(Decimal(str(r.weight)))
+                except Exception:
+                    pass
+            if r.unit_price is not None:
+                try:
+                    unit_prices.append(Decimal(str(r.unit_price)))
+                except Exception:
+                    pass
+        spec_key = _clip_field(spec, 50)
+        if weights:
+            MiscLowPriceDetail.objects.create(
+                inquiry_no=inquiry_no,
+                part_id=part_id,
+                cost_type="1",
+                material_spec=spec_key,
+                item_no="1",
+                value=_clip_price_str(min(weights)),
+                souce_no=souce_ref,
+            )
+        if unit_prices:
+            MiscLowPriceDetail.objects.create(
+                inquiry_no=inquiry_no,
+                part_id=part_id,
+                cost_type="1",
+                material_spec=spec_key,
+                item_no="2",
+                value=_clip_price_str(min(unit_prices)),
+                souce_no=souce_ref,
+            )
+
+    # —— 主表：加工（按工站）——
+    processes = QuotationProcess.objects.filter(quotation_no__in=qn_list, part_id=part_id)
+    by_station: dict[str, list] = defaultdict(list)
+    for p in processes:
+        st = (p.process_station or "").strip() or "工站"
+        by_station[st].append(p)
+
+    for station, rows in by_station.items():
+        prices = []
+        for r in rows:
+            if r.process_price is not None:
+                try:
+                    prices.append(Decimal(str(r.process_price)))
+                except Exception:
+                    continue
+        if prices:
+            MiscLowPriceHeader.objects.create(
+                inquiry_no=inquiry_no,
+                part_id=part_id,
+                souce_no=souce_ref or None,
+                cost_type="2",
+                item_no=_clip_field(station, 100),
+                min_price=_clip_price_str(min(prices)),
+            )
+
+    # —— 主表：包装费 / 运输费 ——
+    others = QuotationOther.objects.filter(quotation_no__in=qn_list, part_id=part_id)
+    pkg_vals = []
+    tr_vals = []
+    for o in others:
+        if o.packaging_cost is not None:
+            try:
+                pkg_vals.append(Decimal(str(o.packaging_cost)))
+            except Exception:
+                pass
+        if o.transportation_cost is not None:
+            try:
+                tr_vals.append(Decimal(str(o.transportation_cost)))
+            except Exception:
+                pass
+    if pkg_vals:
+        MiscLowPriceHeader.objects.create(
+            inquiry_no=inquiry_no,
+            part_id=part_id,
+            souce_no=souce_ref or None,
+            cost_type="3",
+            item_no="包装费",
+            min_price=_clip_price_str(min(pkg_vals)),
+        )
+    if tr_vals:
+        MiscLowPriceHeader.objects.create(
+            inquiry_no=inquiry_no,
+            part_id=part_id,
+            souce_no=souce_ref or None,
+            cost_type="4",
+            item_no="运输费",
+            min_price=_clip_price_str(min(tr_vals)),
+        )
+
+
 class MiscMaterialViewSet(CustomModelViewSet):
     queryset = MiscProcurementMaterialInfo.objects.all()
     serializer_class = MiscMaterialSerializer
@@ -870,24 +1024,39 @@ class InquiryViewSet(CustomModelViewSet):
 
     @action(methods=["put"], detail=True)
     def confirm_negotiation(self, request, pk=None):
-        """确认议价：从比议价中进入议价确认/价格审核"""
+        """确认议价：从比议价中进入议价确认/价格审核；并写入比价-制程最低价主/次表。"""
         instance = self.get_object()
         if int(instance.status or self.STATUS_BARGaining) != self.STATUS_BARGaining:
             return ErrorResponse(msg='只有“比议价中”状态的询价单才能确认议价')
-        current_user = self._get_request_username() or None
-        current_time = timezone.now()
-        return self._save_status(
-            instance,
-            status=self.STATUS_NEGOTIATED,
-            confirm_user=getattr(instance, "confirm_user", None),
-            confirm_time=getattr(instance, "confirm_time", None),
-            release_user=getattr(instance, "release_user", None),
-            release_time=getattr(instance, "release_time", None),
-            comparison_user=getattr(instance, "comparison_user", None),
-            comparison_time=getattr(instance, "comparison_time", None),
-            operation_type=8,
-            operation_desc="议价审核提交（进入价格审核）",
-        )
+        part_id = (request.data.get("part_id") or request.query_params.get("part_id") or "").strip()
+        if not part_id:
+            first = InquiryRfqItem.objects.filter(inquiry_no=instance).order_by("id").first()
+            if first:
+                part_id = (first.part_id or "").strip()
+        try:
+            with transaction.atomic():
+                if part_id:
+                    _sync_misc_low_price_records(instance, part_id)
+                else:
+                    logger.warning(
+                        "confirm_negotiation: 缺少 part_id，跳过制程最低价落库 inquiry_no=%s",
+                        instance.inquiry_no,
+                    )
+                return self._save_status(
+                    instance,
+                    status=self.STATUS_NEGOTIATED,
+                    confirm_user=getattr(instance, "confirm_user", None),
+                    confirm_time=getattr(instance, "confirm_time", None),
+                    release_user=getattr(instance, "release_user", None),
+                    release_time=getattr(instance, "release_time", None),
+                    comparison_user=getattr(instance, "comparison_user", None),
+                    comparison_time=getattr(instance, "comparison_time", None),
+                    operation_type=8,
+                    operation_desc="议价审核提交（进入价格审核）",
+                )
+        except Exception as exc:
+            logger.exception("confirm_negotiation 写入制程最低价失败")
+            return ErrorResponse(msg=f"确认比价失败：{exc}")
 
     @action(methods=["put"], detail=True)
     def submit_price_audit(self, request, pk=None):
diff --git a/backend/apps/pissupplier/views.py b/backend/apps/pissupplier/views.py
index afd9b76..ba85652 100644
--- a/backend/apps/pissupplier/views.py
+++ b/backend/apps/pissupplier/views.py
@@ -32,7 +32,13 @@ from apps.pissupplier.serializers import (
 class QuotationMasterViewSet(CustomModelViewSet):
     """杂采报价单主表管理接口"""
 
-    queryset = QuotationMaster.objects.prefetch_related("rfq_items")
+    queryset = QuotationMaster.objects.prefetch_related(
+        "rfq_items",
+        "material_costs",
+        "process_costs",
+        "other_costs",
+        "profit_costs",
+    )
     serializer_class = QuotationMasterSerializer
     create_serializer_class = QuotationMasterCreateUpdateSerializer
     update_serializer_class = QuotationMasterCreateUpdateSerializer
diff --git a/web/src/views/pisadmin/miscprocurement/rfqmiscellaneous/api.ts b/web/src/views/pisadmin/miscprocurement/rfqmiscellaneous/api.ts
index ed352d4..5022a21 100644
--- a/web/src/views/pisadmin/miscprocurement/rfqmiscellaneous/api.ts
+++ b/web/src/views/pisadmin/miscprocurement/rfqmiscellaneous/api.ts
@@ -11,7 +11,9 @@ export const ConfirmObj = (id: string | number) => request({ url: `${baseUrl}${i
 export const RestoreObj = (id: string | number) => request({ url: `${baseUrl}${id}/restore/`, method: 'put' })
 export const PublishObj = (id: string | number) => request({ url: `${baseUrl}${id}/publish/`, method: 'put' })
 export const StartBargainingObj = (id: string | number) => request({ url: `${baseUrl}${id}/start_bargaining/`, method: 'put' })
-export const ConfirmNegotiationObj = (id: string | number) => request({ url: `${baseUrl}${id}/confirm_negotiation/`, method: 'put' })
+/** 确认比价：后端写入制程最低价主/次表时需带 part_id（与议价记录一致） */
+export const ConfirmNegotiationObj = (id: string | number, data?: { part_id?: string }) =>
+  request({ url: `${baseUrl}${id}/confirm_negotiation/`, method: 'put', data: data ?? {} })
 export const SubmitPriceAuditObj = (id: string | number) => request({ url: `${baseUrl}${id}/submit_price_audit/`, method: 'put' })
 /** 查询杂采议价记录（比价议价价格存此表，非报价明细「中标价格」） */
 export const GetNegotiationRecordsObj = (id: string | number, params: { part_id?: string }) =>
diff --git a/web/src/views/pisadmin/miscprocurement/rfqmiscellaneous/index.vue b/web/src/views/pisadmin/miscprocurement/rfqmiscellaneous/index.vue
index 5a620d2..bbea8ae 100644
--- a/web/src/views/pisadmin/miscprocurement/rfqmiscellaneous/index.vue
+++ b/web/src/views/pisadmin/miscprocurement/rfqmiscellaneous/index.vue
@@ -40,7 +40,7 @@
                 <el-option v-for="tpl in templateOptions" :key="tpl.value" :label="tpl.label" :value="tpl.value" />
               </el-select>
             </el-form-item>
-            <el-form-item label="采购件料号">
+            <el-form-item label="采购件料号" required>
               <el-select
                 v-model="form.part_no"
                 placeholder="选择采购件料号"
@@ -65,6 +65,12 @@
                 <el-option v-for="c in categoryDict" :key="c.value" :label="c.label" :value="c.value" />
               </el-select>
             </el-form-item>
+            <el-form-item label="采购方式" required>
+              <el-select v-model="form.buying_method" placeholder="采购方式" clearable>
+                <el-option :value="1" label="询价" />
+                <el-option :value="2" label="招标" />
+              </el-select>
+            </el-form-item>
             <el-form-item label="报价截止时" required>
               <div class="quote-deadline-input">
                 <el-date-picker
@@ -80,13 +86,7 @@
                 </el-select>
               </div>
             </el-form-item>
-            <!-- <el-form-item label="采购方式">
-              <el-select v-model="form.buying_method" placeholder="采购方式" clearable>
-                <el-option :value="1" label="询价" />
-                <el-option :value="2" label="招标" />
-              </el-select>
-            </el-form-item>
-            <el-form-item label="投标开始时间">
+            <!-- el-form-item label="投标开始时间">
               <template v-if="isInquiryBuyingMethod">
                 <span class="bid-time-placeholder">-</span>
               </template>
@@ -450,8 +450,35 @@
           <el-table-column type="expand" width="1" class-name="hidden-expand" header-class-name="hidden-expand">
             <template #default="{ row }">
               <div class="compare-detail">
+                <template v-if="row.detailGroups && row.detailGroups.length">
+                  <div v-for="grp in row.detailGroups" :key="grp.title" class="compare-detail-group">
+                    <div class="compare-detail-group-title">{{ grp.title }}</div>
+                    <el-table :data="grp.lines" size="small" border class="compare-detail-table">
+                      <el-table-column label="明细" prop="label" min-width="140" />
+                      <el-table-column
+                        v-for="sup in comparisonDialog.suppliers"
+                        :key="`${grp.title}-${sup.name}`"
+                        :prop="`values.${sup.name}`"
+                        :label="sup.name"
+                        min-width="120"
+                      >
+                        <template #default="{ row: line }">
+                          <span :class="['compare-value', line.min === line.values[sup.name] ? 'is-min' : '']">
+                            {{ line.values[sup.name] ?? '-' }}
+                          </span>
+                        </template>
+                      </el-table-column>
+                      <el-table-column prop="avg" label="平均价" width="100">
+                        <template #default="{ row: line }">{{ formatCompareAvg(line.avg) }}</template>
+                      </el-table-column>
+                      <el-table-column prop="min" label="制程最低价" width="110">
+                        <template #default="{ row: line }">{{ line.min !== undefined ? line.min : '-' }}</template>
+                      </el-table-column>
+                    </el-table>
+                  </div>
+                </template>
                 <el-table
-                  v-if="row.details && row.details.length"
+                  v-else-if="row.details && row.details.length"
                   :data="row.details"
                   size="small"
                   border
@@ -484,7 +511,11 @@
           </el-table-column>
           <el-table-column prop="label" label="成本结构" fixed="left" min-width="160">
             <template #default="{ row }">
-              <span v-if="row.details && row.details.length" class="expand-toggle" @click.stop="toggleCompareExpand(row)">
+              <span
+                v-if="(row.details && row.details.length) || (row.detailGroups && row.detailGroups.length)"
+                class="expand-toggle"
+                @click.stop="toggleCompareExpand(row)"
+              >
                 {{ expandedRowKeys.includes(comparisonRowKeyFn(row)) ? '－' : '＋' }}
               </span>
               <span>{{ row.label }}</span>
@@ -1746,7 +1777,13 @@ const openEdit = (row: any) => openDetail(row, 'edit')
 const openView = (row: any) => openDetail(row, 'view')
 
 type ComparisonDetailRow = { label: string; values: Record<string, any>; avg?: number; min?: number }
-type ComparisonRow = ComparisonDetailRow & { key: string; details?: ComparisonDetailRow[] }
+/** 材料/加工：按材质或工站分组，组内多行明细（对齐 bargain_price.html 展开结构） */
+type ComparisonDetailGroup = { title: string; lines: ComparisonDetailRow[] }
+type ComparisonRow = ComparisonDetailRow & {
+  key: string
+  details?: ComparisonDetailRow[]
+  detailGroups?: ComparisonDetailGroup[]
+}
 
 const compareTableRef = ref()
 /** el-table 内 el-input 在异步合并 values 后常不重绘，递增 key 强制刷新 */
@@ -1866,7 +1903,17 @@ const mergeNegotiationIntoComparisonRows = (
 
 /** 合并议价数据后整体替换行引用，避免 el-table 单元格内 el-input 不随异步赋值更新 */
 const applyComparisonRowsAfterNegotiationMerge = async (rows: ComparisonRow[]) => {
-  comparisonDialog.rows = rows.map((r) => ({ ...r, values: { ...r.values } }))
+  comparisonDialog.rows = rows.map((r) => ({
+    ...r,
+    values: { ...r.values },
+    details: r.details ? r.details.map((d) => ({ ...d, values: { ...d.values } })) : undefined,
+    detailGroups: r.detailGroups
+      ? r.detailGroups.map((g) => ({
+          ...g,
+          lines: g.lines.map((l) => ({ ...l, values: { ...l.values } }))
+        }))
+      : undefined
+  }))
   await nextTick()
   compareTableRenderKey.value += 1
 }
@@ -1977,40 +2024,170 @@ const firstRfqField = (q: any, field: string) => {
   return v !== undefined && v !== null && v !== '' ? v : undefined
 }
 
-const buildMaterialProcessOtherDetails = (quotes: any[], supplierKeys: string[], kind: 'material' | 'process' | 'other') => {
+/** 与比价表「总价」行一致，用于按含税总价排名（价低名次靠前） */
+const getQuoteTotalNumeric = (q: any): number | null => {
+  const a = q?.quote_amount
+  if (a !== undefined && a !== null && a !== '') {
+    const n = Number(a)
+    if (Number.isFinite(n)) return n
+  }
+  const s = sumRfqField(q, 'total_price_incl_tax')
+  if (s != null && Number.isFinite(s)) return s
+  return null
+}
+
+/** 按总价升序赋名次；同价同名次（1,1,3）；无有效总价显示为 '-' */
+const buildRanksByTotal = (quotes: any[], supplierKeys: string[]): Record<string, any> => {
+  const out: Record<string, any> = {}
+  supplierKeys.forEach((k) => {
+    out[k] = '-'
+  })
+  const entries = supplierKeys
+    .map((key, idx) => ({ key, total: getQuoteTotalNumeric(quotes[idx]) }))
+    .filter((e): e is { key: string; total: number } => e.total != null && Number.isFinite(e.total))
+  entries.sort((a, b) => a.total - b.total)
+  let rank = 1
+  for (let i = 0; i < entries.length; i++) {
+    if (i > 0 && entries[i].total !== entries[i - 1].total) {
+      rank = i + 1
+    }
+    out[entries[i].key] = rank
+  }
+  return out
+}
+
+/** 合并 option_json 扁平字段，便于带出模板扩展列（损耗率、模穴数等） */
+const mergeOptionJsonIntoRow = (row: any): any => {
+  if (!row || typeof row !== 'object') return row
+  const oj = row.option_json
+  if (oj == null || oj === '') return row
+  let extra: Record<string, any> = {}
+  if (typeof oj === 'string') {
+    try {
+      const p = JSON.parse(oj)
+      if (p && typeof p === 'object') extra = p
+    } catch {
+      return row
+    }
+  } else if (typeof oj === 'object') {
+    extra = oj as Record<string, any>
+  }
+  return { ...row, ...extra }
+}
+
+const formatMetricCell = (v: unknown): string => {
+  if (v === null || v === undefined || v === '') return '-'
+  const n = Number(v)
+  if (Number.isFinite(n)) return String(v)
+  return String(v)
+}
+
+const findMaterialRowBySpec = (q: any, spec: string) => {
+  const t = String(spec || '').trim()
+  return (q.material_costs || []).find((r: any) => String(r.material_spec || '').trim() === t)
+}
+
+const findProcessRowByStation = (q: any, station: string) => {
+  const t = String(station || '').trim()
+  return (q.process_costs || []).find((r: any) => String(r.process_station || '').trim() === t)
+}
+
+/** 材料成本展开：按材料规格分组，组内展示重量/尺寸/单价/费用等（与报价单 material_costs 一致） */
+const buildMaterialDetailGroups = (quotes: any[], supplierKeys: string[]): ComparisonDetailGroup[] => {
+  const specs = new Set<string>()
+  quotes.forEach((q) => {
+    ;(q.material_costs || []).forEach((r: any) => {
+      specs.add(String(r.material_spec || '').trim() || '材料')
+    })
+  })
+  const sortedSpecs = [...specs].sort()
+  const metrics: { label: string; get: (r: any) => unknown }[] = [
+    { label: '用量(重量)', get: (r) => r?.weight },
+    { label: '长', get: (r) => r?.length },
+    { label: '宽', get: (r) => r?.width },
+    { label: '高', get: (r) => r?.height },
+    { label: '材料单价', get: (r) => r?.unit_price },
+    { label: '比重', get: (r) => r?.specific_gravity },
+    { label: '数量', get: (r) => r?.qty },
+    { label: '损耗率(%)', get: (r) => r?.loss_rate ?? r?.lossRate },
+    { label: '材料费用', get: (r) => r?.material_cost },
+    { label: '备注', get: (r) => r?.remark }
+  ]
+  const groups: ComparisonDetailGroup[] = []
+  for (const spec of sortedSpecs) {
+    const lines: ComparisonDetailRow[] = []
+    for (const m of metrics) {
+      const values: Record<string, any> = {}
+      supplierKeys.forEach((sup, idx) => {
+        const raw = findMaterialRowBySpec(quotes[idx], spec)
+        const merged = mergeOptionJsonIntoRow(raw || {})
+        values[sup] = formatMetricCell(m.get(merged))
+      })
+      const allDash = supplierKeys.every((sup) => values[sup] === '-')
+      if (allDash) continue
+      lines.push({ label: m.label, values, ...calcCompareStats(values) })
+    }
+    if (lines.length) groups.push({ title: spec || '材料', lines })
+  }
+  return groups
+}
+
+/** 加工成本展开：按工站分组，组内展示计量/费率/加工费等 */
+const buildProcessDetailGroups = (quotes: any[], supplierKeys: string[]): ComparisonDetailGroup[] => {
+  const stations = new Set<string>()
+  quotes.forEach((q) => {
+    ;(q.process_costs || []).forEach((r: any) => {
+      stations.add(String(r.process_station || '').trim() || '工站')
+    })
+  })
+  const sorted = [...stations].sort()
+  const metrics: { label: string; get: (r: any) => unknown }[] = [
+    { label: '加工计量', get: (r) => r?.process_qty },
+    { label: '单位', get: (r) => r?.unit },
+    { label: '费率', get: (r) => r?.unit_rate },
+    { label: '加工时间', get: (r) => r?.process_time ?? r?.processTime },
+    { label: '模穴数', get: (r) => r?.cavity_count ?? r?.cavityCount },
+    { label: '加工费用', get: (r) => r?.process_price },
+    { label: '备注', get: (r) => r?.remark }
+  ]
+  const groups: ComparisonDetailGroup[] = []
+  for (const station of sorted) {
+    const lines: ComparisonDetailRow[] = []
+    for (const m of metrics) {
+      const values: Record<string, any> = {}
+      supplierKeys.forEach((sup, idx) => {
+        const raw = findProcessRowByStation(quotes[idx], station)
+        const merged = mergeOptionJsonIntoRow(raw || {})
+        values[sup] = formatMetricCell(m.get(merged))
+      })
+      const allDash = supplierKeys.every((s) => values[s] === '-')
+      if (allDash) continue
+      lines.push({ label: m.label, values, ...calcCompareStats(values) })
+    }
+    if (lines.length) groups.push({ title: station || '工站', lines })
+  }
+  return groups
+}
+
+/** 其它成本：包装费 / 运输费（保持原单层表） */
+const buildOtherCostDetails = (quotes: any[], supplierKeys: string[]): ComparisonDetailRow[] => {
   const map = new Map<string, ComparisonDetailRow>()
   quotes.forEach((q, idx) => {
     const sup = supplierKeys[idx]
-    if (kind === 'material') {
-      for (const r of q.material_costs || []) {
-        const label = String(r.material_spec || r.part_id || '材料').trim() || '材料'
+    for (const r of q.other_costs || []) {
+      const pkg = r.packaging_cost
+      const tr = r.transportation_cost
+      if (pkg !== undefined && pkg !== null && pkg !== '') {
+        const label = '包装费'
         if (!map.has(label)) map.set(label, { label, values: {} })
-        const n = Number(r.material_cost)
-        map.get(label)!.values[sup] = Number.isFinite(n) ? n : (r.material_cost ?? '-')
+        const n = Number(pkg)
+        map.get(label)!.values[sup] = Number.isFinite(n) ? n : pkg
       }
-    } else if (kind === 'process') {
-      for (const r of q.process_costs || []) {
-        const label = String(r.process_station || '工站').trim() || '工站'
+      if (tr !== undefined && tr !== null && tr !== '') {
+        const label = '运输费'
         if (!map.has(label)) map.set(label, { label, values: {} })
-        const n = Number(r.process_price)
-        map.get(label)!.values[sup] = Number.isFinite(n) ? n : (r.process_price ?? '-')
-      }
-    } else {
-      for (const r of q.other_costs || []) {
-        const pkg = r.packaging_cost
-        const tr = r.transportation_cost
-        if (pkg !== undefined && pkg !== null && pkg !== '') {
-          const label = '包装费'
-          if (!map.has(label)) map.set(label, { label, values: {} })
-          const n = Number(pkg)
-          map.get(label)!.values[sup] = Number.isFinite(n) ? n : pkg
-        }
-        if (tr !== undefined && tr !== null && tr !== '') {
-          const label = '运输费'
-          if (!map.has(label)) map.set(label, { label, values: {} })
-          const n = Number(tr)
-          map.get(label)!.values[sup] = Number.isFinite(n) ? n : tr
-        }
+        const n = Number(tr)
+        map.get(label)!.values[sup] = Number.isFinite(n) ? n : tr
       }
     }
   })
@@ -2067,10 +2244,7 @@ const buildComparisonRowsFromPisQuotes = (quotes: any[]) => {
   })
   rows.push({ key: 'total', label: '总价', values: totalValues, ...calcCompareStats(totalValues) })
 
-  const rankValues: Record<string, any> = {}
-  supplierKeys.forEach((name, idx) => {
-    rankValues[name] = quotes[idx]?.rank ?? quotes[idx]?.quote_rank ?? '1'
-  })
+  const rankValues = buildRanksByTotal(quotes, supplierKeys)
   rows.push({ key: 'rank', label: '报价排名', values: rankValues })
 
   /* 议价价格仅由杂采议价记录表回显（openComparison 中 merge），勿用报价明细 winning_bid_price 以免与议价记录不一致 */
@@ -2093,17 +2267,16 @@ const buildComparisonRowsFromPisQuotes = (quotes: any[]) => {
   })
   rows.push({ key: 'award', label: '中标否', values: winValues })
 
-  const materialDetails = buildMaterialProcessOtherDetails(quotes, supplierKeys, 'material')
-  const processDetails = buildMaterialProcessOtherDetails(quotes, supplierKeys, 'process')
-  const otherDetails = buildMaterialProcessOtherDetails(quotes, supplierKeys, 'other')
+  const materialGroups = buildMaterialDetailGroups(quotes, supplierKeys)
+  const processGroups = buildProcessDetailGroups(quotes, supplierKeys)
+  const otherDetails = buildOtherCostDetails(quotes, supplierKeys)
 
-  const attachDetail = (key: string, details: ComparisonDetailRow[]) => {
-    const target = rows.find((r) => r.key === key)
-    if (target && details.length) target.details = details
-  }
-  attachDetail('material', materialDetails)
-  attachDetail('process', processDetails)
-  attachDetail('other', otherDetails)
+  const matRow = rows.find((r) => r.key === 'material')
+  if (matRow && materialGroups.length) matRow.detailGroups = materialGroups
+  const procRow = rows.find((r) => r.key === 'process')
+  if (procRow && processGroups.length) procRow.detailGroups = processGroups
+  const otherRow = rows.find((r) => r.key === 'other')
+  if (otherRow && otherDetails.length) otherRow.details = otherDetails
 
   const suppliers = supplierKeys.map((name, idx) => ({
     name: name || `供应商${idx + 1}`,
@@ -2113,6 +2286,22 @@ const buildComparisonRowsFromPisQuotes = (quotes: any[]) => {
   return { suppliers, rows }
 }
 
+/** 税率等：取首个非空值（接口 tax_rate / 嵌套 rfq_items、profit_costs） */
+const firstNonEmptyString = (...vals: unknown[]) => {
+  for (const v of vals) {
+    if (v === null || v === undefined || v === '') continue
+    const s = String(v).trim()
+    if (s !== '') {
+      const num = Number(s)
+      if (isNaN(num)) {
+        return s
+      }
+      return `${num.toFixed(2)}%`
+    }
+  }
+  return ''
+}
+
 const openComparison = async (row: any) => {
   // const st = Number(row?.status)
   // if (![6, 7, 8].includes(st)) {
@@ -2124,13 +2313,19 @@ const openComparison = async (row: any) => {
   comparisonDialog.visible = true
   comparisonDialog.loading = true
   comparisonDialog.title = `比价/议价 - ${row.title || row.inquiry_name || row.inquiry_no || ''}`
+  const rfqFromRow = Array.isArray(row.rfq_items) ? row.rfq_items[0] : undefined
+  const profitFromRow = Array.isArray(row.profit_costs)
+    ? rfqFromRow?.part_id
+      ? row.profit_costs.find((p: any) => p.part_id === rfqFromRow.part_id) || row.profit_costs[0]
+      : row.profit_costs[0]
+    : undefined
   comparisonDialog.baseInfo = {
     code: row.inquiry_no || '',
-    partNo: row.part_no || '',
-    partName: row.part_name || '',
+    partNo: String(row.part_no || row.part_id || rfqFromRow?.part_id || '').trim(),
+    partName: String(row.part_name || rfqFromRow?.product_name || '').trim(),
     targetPrice: row.target_price != null ? String(row.target_price) : '',
-    currency: row.currency || '',
-    taxRate: row.tax_rate != null ? String(row.tax_rate) : '',
+    currency: String(row.currency || row.transaction_currency || '').trim(),
+    taxRate: firstNonEmptyString(row.tax_rate, rfqFromRow?.tax_rate, profitFromRow?.tax_rate),
     dealPrice: row.win_price != null ? String(row.win_price) : '-',
     lowestProcessPrice: '-'
   }
@@ -2145,6 +2340,24 @@ const openComparison = async (row: any) => {
     comparisonDialog.quotes = quotes
     comparisonDialog.suppliers = suppliers
     comparisonDialog.rows = rows
+    const rq0 = quotes[0]?.rfq_items?.[0]
+    if (rq0) {
+      if (!comparisonDialog.baseInfo.partNo) comparisonDialog.baseInfo.partNo = String(rq0.part_id || '').trim()
+      if (!comparisonDialog.baseInfo.partName) comparisonDialog.baseInfo.partName = String(rq0.product_name || '').trim()
+    }
+    if (!comparisonDialog.baseInfo.taxRate) {
+      const pcQ =
+        quotes[0] && Array.isArray(quotes[0].profit_costs)
+          ? rq0?.part_id
+            ? quotes[0].profit_costs.find((p: any) => p.part_id === rq0.part_id) || quotes[0].profit_costs[0]
+            : quotes[0].profit_costs[0]
+          : undefined
+      comparisonDialog.baseInfo.taxRate = firstNonEmptyString(rq0?.tax_rate, pcQ?.tax_rate)
+    }
+    if (!comparisonDialog.baseInfo.currency && quotes[0]) {
+      const c = quotes[0].currency ?? quotes[0].transaction_currency
+      if (c != null && c !== '') comparisonDialog.baseInfo.currency = String(c).trim()
+    }
     const partId = resolveComparisonPartId(row, quotes)
     if (partId) {
       try {
@@ -2157,9 +2370,10 @@ const openComparison = async (row: any) => {
         /* 无议价记录时沿用报价单展示 */
       }
     }
-    const procRow = rows.find((r) => r.key === 'process')
-    if (procRow && procRow.min !== undefined) {
-      comparisonDialog.baseInfo.lowestProcessPrice = String(procRow.min)
+    /** 与表格「制程最低价」列一致：取「总价」行各供应商报价中的最小值，勿用「加工成本」或「议价价格」行 */
+    const totalRow = rows.find((r) => r.key === 'total')
+    if (totalRow && totalRow.min !== undefined) {
+      comparisonDialog.baseInfo.lowestProcessPrice = String(totalRow.min)
     }
   } catch (e: any) {
     comparisonDialog.quotes = []
@@ -2185,7 +2399,11 @@ const updateComparisonRowStats = (row: any) => {
   }
 }
 
-const comparisonRowClassName = ({ row }: any) => (!row.details || !row.details.length ? 'no-expand' : '')
+const comparisonRowClassName = ({ row }: any) => {
+  const has =
+    (row.details && row.details.length) || (row.detailGroups && row.detailGroups.length)
+  return has ? '' : 'no-expand'
+}
 
 const comparisonRowKeyFn = (row: ComparisonRow) => String(row.key || row.label || '')
 
@@ -2201,7 +2419,9 @@ const handleComparisonExpandChange = (row: ComparisonRow, expandedRows: Comparis
 }
 
 const toggleCompareExpand = (row: ComparisonRow) => {
-  if (!row.details || !row.details.length) return
+  const has =
+    (row.details && row.details.length) || (row.detailGroups && row.detailGroups.length)
+  if (!has) return
   const key = comparisonRowKeyFn(row)
   const next = !expandedRowKeys.value.includes(key)
   ;(compareTableRef.value as any)?.toggleRowExpansion?.(row, next)
@@ -2270,7 +2490,7 @@ const validateComparisonAwardAndBargain = async () => {
 
 const saveComparison = async (target: 'draft' | 'negotiated' | 'audit') => {
   const st = Number(comparisonDialog.currentRow?.status)
-  if (target === 'negotiated' && st !== 6) {
+  if (target === 'negotiated' && ![5, 6].includes(st)) {
     ElMessage.warning('仅比议价中状态可确认比价')
     return
   }
@@ -2348,7 +2568,7 @@ const saveComparison = async (target: 'draft' | 'negotiated' | 'audit') => {
       })
     )
     if (target === 'negotiated') {
-      await api.ConfirmNegotiationObj(comparisonDialog.currentRow.id)
+      await api.ConfirmNegotiationObj(comparisonDialog.currentRow.id, { part_id: partId })
       comparisonDialog.currentRow.status = 7
       ElMessage.success('已确认比价')
       crudExpose.doRefresh()
@@ -3009,6 +3229,22 @@ onMounted(() => {
 .compare-detail {
   padding: 4px 0 6px;
 }
+.compare-detail-group {
+  margin-bottom: 12px;
+}
+.compare-detail-group:last-child {
+  margin-bottom: 0;
+}
+.compare-detail-group-title {
+  font-weight: 600;
+  font-size: 13px;
+  color: #065f46;
+  background: linear-gradient(90deg, #d1fae5 0%, #ecfdf5 55%, transparent 100%);
+  padding: 6px 10px;
+  margin-bottom: 6px;
+  border-radius: 4px;
+  border-left: 3px solid #10b981;
+}
 .compare-detail-table {
   margin: 0;
 }