feat(distribution): 分站收号压价解耦买家价（方案 B 新口径）

核心语义反转：receive_cost_delta 为压价点数，收号比例 = 主站参考比例 R + 点数，
点数越大号主收号价越低；买家售价锚定主站参考比例推导，不再随收号价联动。

- 迁移 000072：distribution_sites 新增 receive_cost_delta（旧 receive_ratio_delta 保留只读）
- receive_pricing：新增 Normalize/ApplySiteReceiveCostDelta；分站定价买家侧改用
  R 锚点（referenceSellerCoinBasePrice），快照写入 site_receive_cost_delta 与 pricing_model 标记
- site_receive：新增 resolveSiteReceiveCostDelta 读取链路，旧 ResolveReceiveRatioDelta 保留
- 分成不变：压价差经结算层 profit 自动进入 35/40/25 三方分成池；
  货架自主加价仍 100% 归分站，两条边界均以主站为锚
- 权限对齐旧字段：主站全局管理员与分站操作员均可设置
- 前端三端同步：主站 pricing.ts/usePricingCalculator 买卖解耦试算、
  主站后台弹窗改「收号压价」价格语义文案、分销后台 SiteSettings 同步
- 测试：单测锚定 R=43 时 cost_delta=3 → 收号 217.4 / 卖价 263.2 不变 / markup 池 30.6→54.9

backend/internal/model/distribution.go

@@ -19,6 +19,7 @@ type DistributionSite struct {
 	ListingQrcodeURL      string    `gorm:"size:512;not null;default:''" json:"listing_qrcode_url"`
 	SMSConfigJSON         string    `gorm:"type:text" json:"-"`
 	ReceiveRatioDelta     float64   `gorm:"type:decimal(10,2);not null;default:0" json:"receive_ratio_delta"`
+	ReceiveCostDelta      float64   `gorm:"type:decimal(10,2);not null;default:0" json:"receive_cost_delta"`
 	TaxEnabled            bool      `gorm:"not null;default:false" json:"tax_enabled"`
 	TaxRateBPS            int64     `gorm:"not null;default:100" json:"tax_rate_bps"`
 	SettlementHoldDays    int       `gorm:"not null;default:7" json:"settlement_hold_days"`

backend/internal/modules/distribution/dto.go

@@ -17,6 +17,7 @@ type SiteDTO struct {
 	DefaultSupportGroupID *uint64   `json:"default_support_group_id,omitempty"`
 	ListingQrcodeURL      string    `json:"listing_qrcode_url"`
 	ReceiveRatioDelta     float64   `json:"receive_ratio_delta"`
+	ReceiveCostDelta      float64   `json:"receive_cost_delta"`
 	TaxEnabled            bool      `json:"tax_enabled"`
 	TaxRateBPS            int64     `json:"tax_rate_bps"`
 	SettlementHoldDays    int       `json:"settlement_hold_days"`
@@ -32,6 +33,7 @@ type CreateSiteRequest struct {
 	DefaultSupportGroupID *uint64  `json:"default_support_group_id"`
 	ListingQrcodeURL      *string  `json:"listing_qrcode_url"`
 	ReceiveRatioDelta     *float64 `json:"receive_ratio_delta"`
+	ReceiveCostDelta      *float64 `json:"receive_cost_delta"`
 	TaxEnabled            *bool    `json:"tax_enabled"`
 	TaxRateBPS            *int64   `json:"tax_rate_bps"`
 	SettlementHoldDays    *int     `json:"settlement_hold_days"`
@@ -45,6 +47,7 @@ type UpdateSiteRequest struct {
 	DefaultSupportGroupID *uint64  `json:"default_support_group_id"`
 	ListingQrcodeURL      *string  `json:"listing_qrcode_url"`
 	ReceiveRatioDelta     *float64 `json:"receive_ratio_delta"`
+	ReceiveCostDelta      *float64 `json:"receive_cost_delta"`
 	TaxEnabled            *bool    `json:"tax_enabled"`
 	TaxRateBPS            *int64   `json:"tax_rate_bps"`
 	SettlementHoldDays    *int     `json:"settlement_hold_days"`
@@ -248,6 +251,7 @@ type PublicSiteInfoDTO struct {
 	FooterInfoJSON        string  `json:"footer_info_json"`
 	DefaultSupportGroupID *uint64 `json:"default_support_group_id,omitempty"`
 	ReceiveRatioDelta     float64 `json:"receive_ratio_delta"`
+	ReceiveCostDelta      float64 `json:"receive_cost_delta"`
 }
 
 type UpdateAccountDisplayRequest struct {

backend/internal/modules/distribution/repository.go

@@ -73,6 +73,13 @@ func normalizeReceiveRatioDelta(delta float64) (float64, error) {
 	return listingpkg.NormalizeSiteReceiveRatioDelta(delta), nil
 }
 
+func normalizeReceiveCostDelta(delta float64) (float64, error) {
+	if delta < 0 {
+		return 0, ErrInvalidAmount
+	}
+	return listingpkg.NormalizeSiteReceiveCostDelta(delta), nil
+}
+
 type Repository struct {
 	db            *gorm.DB
 	redis         *redis.Client
@@ -333,6 +340,13 @@ func (r *Repository) CreateSite(ctx context.Context, req CreateSiteRequest) (*Si
 		}
 		row.ReceiveRatioDelta = delta
 	}
+	if req.ReceiveCostDelta != nil {
+		delta, err := normalizeReceiveCostDelta(*req.ReceiveCostDelta)
+		if err != nil {
+			return nil, err
+		}
+		row.ReceiveCostDelta = delta
+	}
 	if req.TaxEnabled != nil {
 		row.TaxEnabled = *req.TaxEnabled
 	}
@@ -385,6 +399,13 @@ func (r *Repository) UpdateSite(ctx context.Context, adminID, id uint64, req Upd
 			}
 			row.ReceiveRatioDelta = delta
 		}
+		if req.ReceiveCostDelta != nil {
+			delta, err := normalizeReceiveCostDelta(*req.ReceiveCostDelta)
+			if err != nil {
+				return err
+			}
+			row.ReceiveCostDelta = delta
+		}
 		if !globalAccess {
 			if err := tx.Save(&row).Error; err != nil {
 				return err
@@ -573,6 +594,7 @@ func siteDTO(row model.DistributionSite) SiteDTO {
 		DefaultSupportGroupID: row.DefaultSupportGroupID,
 		ListingQrcodeURL:      row.ListingQrcodeURL,
 		ReceiveRatioDelta:     row.ReceiveRatioDelta,
+		ReceiveCostDelta:      row.ReceiveCostDelta,
 		TaxEnabled:            row.TaxEnabled,
 		TaxRateBPS:            row.TaxRateBPS,
 		SettlementHoldDays:    row.SettlementHoldDays,
@@ -2330,6 +2352,7 @@ func (r *Repository) GetPublicSiteInfo(ctx context.Context, code, domain string)
 		AnnouncementsJSON:     site.AnnouncementsJSON,
 		FooterInfoJSON:        site.FooterInfoJSON,
 		ReceiveRatioDelta:     site.ReceiveRatioDelta,
+		ReceiveCostDelta:      site.ReceiveCostDelta,
 	}
 	if r.redis != nil {
 		if bytes, err := json.Marshal(res); err == nil {

backend/internal/modules/listing/receive_pricing.go

@@ -36,7 +36,7 @@ func ReceivePricingFromAssetSummary(raw datatypes.JSON) ReceivePricingView {
 	}
 }
 
-func (s *Service) applyMainSiteReceivePricing(ctx context.Context, req *CreateRequest, receiveRatioDelta float64, onDistributionSite bool) error {
+func (s *Service) applyMainSiteReceivePricing(ctx context.Context, req *CreateRequest, receiveRatioDelta, receiveCostDelta float64, onDistributionSite bool) error {
 	if req == nil {
 		return nil
 	}
@@ -48,11 +48,12 @@ func (s *Service) applyMainSiteReceivePricing(ctx context.Context, req *CreateRe
 	if err != nil {
 		return err
 	}
-	applyMainSiteReceivePricing(req, options, config, receiveRatioDelta, onDistributionSite)
+	applyMainSiteReceivePricing(req, options, config, receiveRatioDelta, receiveCostDelta, onDistributionSite)
 	return nil
 }
 
-func applyMainSiteReceivePricing(req *CreateRequest, options systemconfig.PublishOptionsDTO, config salePriceConfig, receiveRatioDelta float64, onDistributionSite bool) {
+func applyMainSiteReceivePricing(req *CreateRequest, options systemconfig.PublishOptionsDTO, config salePriceConfig, receiveRatioDelta, receiveCostDelta float64, onDistributionSite bool) {
+
 	if req == nil {
 		return
 	}
@@ -70,18 +71,20 @@ func applyMainSiteReceivePricing(req *CreateRequest, options systemconfig.Publis
 	if requestedRatio <= 0 {
 		requestedRatio = readSummaryNumber(breakdown["accelerated_sale_ratio"])
 	}
+	costDelta := NormalizeSiteReceiveCostDelta(receiveCostDelta)
+	ratioDelta := NormalizeSiteReceiveRatioDelta(receiveRatioDelta)
 	sellerRatio := clampSaleRatio(referenceRatio, requestedRatio)
-	delta := NormalizeSiteReceiveRatioDelta(receiveRatioDelta)
+	// 分站新口径：收号比例 = R + 压价点数（收号价更低），买家定价锚定主站参考比例 R，不随收号价联动。
 	if onDistributionSite {
-		sellerRatio = ApplySiteReceiveRatioDelta(referenceRatio, delta)
+		sellerRatio = ApplySiteReceiveCostDelta(referenceRatio, costDelta)
 	}
 	coinWan := coinM * 100
 	sellerCoinBasePrice := roundMoney(coinWan / sellerRatio)
 	consumablePrice := consumableValue(req.AssetSummary)
 	sellerTotalPrice := roundMoney(sellerCoinBasePrice + consumablePrice)
 	dailyLoss := readSummaryNumber(req.AssetSummary["daily_loss_m"])
-	pricing := calculateExternalPlatformPricing(coinM, sellerRatio, sellerCoinBasePrice, consumablePrice, config)
-
+	// 买家价始终按主站口径推导：分站只改收号侧，卖价与主站同基准（压价差进入三方分成池）。
+	pricing := calculateExternalPlatformPricing(coinM, referenceRatio, referenceSellerCoinBasePrice(coinWan, referenceRatio), consumablePrice, config)
 	breakdown["seller_reference_ratio"] = referenceRatio
 	breakdown["seller_ratio"] = sellerRatio
 	breakdown["seller_coin_base_price"] = sellerCoinBasePrice
@@ -89,7 +92,12 @@ func applyMainSiteReceivePricing(req *CreateRequest, options systemconfig.Publis
 	breakdown["consumable_price"] = consumablePrice
 	breakdown["daily_loss_ratio_adjustment"] = calculateDailyLossRatioAdjustment(dailyLoss)
 	breakdown["accelerated_sale_ratio"] = sellerRatio
-	breakdown["site_receive_ratio_delta"] = delta
+	if onDistributionSite {
+		breakdown["site_receive_cost_delta"] = costDelta
+		breakdown["pricing_model"] = "site_cost_decoupled_v1"
+	} else {
+		breakdown["site_receive_ratio_delta"] = ratioDelta
+	}
 	breakdown["buyer_coin_base_price"] = pricing.BuyerCoinBasePrice
 	breakdown["buyer_total_price"] = pricing.BuyerTotalPrice
 	breakdown["buyer_ratio"] = pricing.BuyerRatio
@@ -100,6 +108,36 @@ func applyMainSiteReceivePricing(req *CreateRequest, options systemconfig.Publis
 	req.PriceCent = yuanToCent(pricing.BuyerTotalPrice)
 }
 
+// NormalizeSiteReceiveCostDelta 将分站收号压价点数限制在 [0, 20]。
+// 点数越大，分站收号比例越高（相对主站参考比例），收号价越低；0 表示与主站同价收号。
+func NormalizeSiteReceiveCostDelta(delta float64) float64 {
+	if delta < 0 || math.IsNaN(delta) || math.IsInf(delta, 0) {
+		return 0
+	}
+	if delta > maxSiteReceiveRatioDelta {
+		return maxSiteReceiveRatioDelta
+	}
+	return roundRatio(delta)
+}
+
+// ApplySiteReceiveCostDelta 按新口径计算分站收号比例：R + 压价点数（收号价更低）。
+// 与旧 ApplySiteReceiveRatioDelta 相反方向，买家价已解耦、不再从收号比例推导。
+func ApplySiteReceiveCostDelta(referenceRatio, delta float64) float64 {
+	if referenceRatio <= 0 {
+		return 0
+	}
+	siteRatio := roundRatio(referenceRatio + NormalizeSiteReceiveCostDelta(delta))
+	return siteRatio
+}
+
+// referenceSellerCoinBasePrice 计算主站参考比例下的号主基础价，用作买家定价锚点。
+func referenceSellerCoinBasePrice(coinWan, referenceRatio float64) float64 {
+	if referenceRatio <= 0 {
+		return 0
+	}
+	return roundMoney(coinWan / referenceRatio)
+}
+
 // NormalizeSiteReceiveRatioDelta 将分站收号下调点数限制在 [0, 20]。
 func NormalizeSiteReceiveRatioDelta(delta float64) float64 {
 	if delta < 0 || math.IsNaN(delta) || math.IsInf(delta, 0) {

backend/internal/modules/listing/receive_pricing_test.go

@@ -40,7 +40,7 @@ func TestCalculateSellerReferenceRatioUsesMainSiteConfig(t *testing.T) {
 
 func TestApplyMainSiteReceivePricingOverwritesClientRatio(t *testing.T) {
 	req := fullReceivePricingRequest(10)
-	applyMainSiteReceivePricing(&req, systemconfig.DefaultPublishOptions(), defaultSalePriceConfig(), 0, false)
+	applyMainSiteReceivePricing(&req, systemconfig.DefaultPublishOptions(), defaultSalePriceConfig(), 0, 0, false)
 	breakdown := ensurePriceBreakdown(req.AssetSummary)
 	if readSummaryNumber(breakdown["seller_ratio"]) != 43 {
 		t.Fatalf("seller_ratio = %v, want 43", breakdown["seller_ratio"])
@@ -61,7 +61,7 @@ func TestApplyMainSiteReceivePricingOverwritesClientRatio(t *testing.T) {
 
 func TestApplyMainSiteReceivePricingKeepsAcceleratedRatioWithinMainSiteRange(t *testing.T) {
 	req := fullReceivePricingRequest(50)
-	applyMainSiteReceivePricing(&req, systemconfig.DefaultPublishOptions(), defaultSalePriceConfig(), 0, false)
+	applyMainSiteReceivePricing(&req, systemconfig.DefaultPublishOptions(), defaultSalePriceConfig(), 0, 0, false)
 	breakdown := ensurePriceBreakdown(req.AssetSummary)
 	if readSummaryNumber(breakdown["seller_ratio"]) != 50 {
 		t.Fatalf("accelerated seller_ratio = %v, want 50", breakdown["seller_ratio"])
@@ -71,27 +71,55 @@ func TestApplyMainSiteReceivePricingKeepsAcceleratedRatioWithinMainSiteRange(t *
 	}
 }
 
-func TestDistributionReceiveRatioCannotExceedMainSite(t *testing.T) {
+func TestDistributionReceiveCostDeltaZeroKeepsMainSitePrice(t *testing.T) {
 	req := fullReceivePricingRequest(50)
-	applyMainSiteReceivePricing(&req, systemconfig.DefaultPublishOptions(), defaultSalePriceConfig(), 0, true)
+	applyMainSiteReceivePricing(&req, systemconfig.DefaultPublishOptions(), defaultSalePriceConfig(), 0, 0, true)
 	breakdown := ensurePriceBreakdown(req.AssetSummary)
 	if readSummaryNumber(breakdown["seller_ratio"]) != 43 {
-		t.Fatalf("distribution seller_ratio = %v, want main-site ceiling 43", breakdown["seller_ratio"])
+		t.Fatalf("distribution seller_ratio = %v, want main-site reference 43 when cost delta is 0", breakdown["seller_ratio"])
+	}
+	if readSummaryNumber(breakdown["buyer_total_price"]) != 263.2 {
+		t.Fatalf("distribution buyer_total_price = %v, want 263.2 anchored to main site", breakdown["buyer_total_price"])
 	}
 }
 
-func TestDistributionReceiveRatioDeltaLowersBelowMainSite(t *testing.T) {
+func TestDistributionReceiveCostDeltaLowersReceivePriceKeepsSellPrice(t *testing.T) {
 	req := fullReceivePricingRequest(50)
-	applyMainSiteReceivePricing(&req, systemconfig.DefaultPublishOptions(), defaultSalePriceConfig(), 3, true)
+	applyMainSiteReceivePricing(&req, systemconfig.DefaultPublishOptions(), defaultSalePriceConfig(), 0, 3, true)
 	breakdown := ensurePriceBreakdown(req.AssetSummary)
-	if readSummaryNumber(breakdown["seller_ratio"]) != 40 {
-		t.Fatalf("distribution seller_ratio = %v, want 40 after lowering 3 points", breakdown["seller_ratio"])
+	// 压价 3 点：收号比例 = R+3 = 46，号主收 217.4（低于主站 232.6）。
+	if readSummaryNumber(breakdown["seller_ratio"]) != 46 {
+		t.Fatalf("distribution seller_ratio = %v, want 46 (R+3) under cost-decoupled model", breakdown["seller_ratio"])
 	}
-	if readSummaryNumber(breakdown["seller_reference_ratio"]) != 43 {
-		t.Fatalf("seller_reference_ratio = %v, want 43", breakdown["seller_reference_ratio"])
+	if got := readSummaryNumber(breakdown["seller_coin_base_price"]); got != 217.4 {
+		t.Fatalf("seller_coin_base_price = %v, want 217.4 (lower than main site 232.6)", got)
 	}
-	if readSummaryNumber(breakdown["site_receive_ratio_delta"]) != 3 {
-		t.Fatalf("site_receive_ratio_delta = %v, want 3", breakdown["site_receive_ratio_delta"])
+	// 卖价锚定主站：买家比例仍为 38、买家价仍为 263.2，不随收号价下降。
+	if readSummaryNumber(breakdown["buyer_ratio"]) != 38 {
+		t.Fatalf("buyer_ratio = %v, want 38 (decoupled from receive ratio)", breakdown["buyer_ratio"])
+	}
+	if readSummaryNumber(breakdown["buyer_total_price"]) != 263.2 {
+		t.Fatalf("buyer_total_price = %v, want 263.2 unchanged by cost delta", breakdown["buyer_total_price"])
+	}
+	// 注意：发布快照的 platform_markup_amount 仍为主站口径提价（30.6，锚定价→买价）；
+	// 压价差不在此体现，而是结算层 profit = 净付款 − 号主快照价（217.4）自动进入 35/40/25 分成池。
+	if readSummaryNumber(breakdown["platform_markup_amount"]) != 30.6 {
+		t.Fatalf("platform_markup_amount = %v, want 30.6 (main-site anchored markup)", breakdown["platform_markup_amount"])
+	}
+	if readSummaryNumber(breakdown["site_receive_cost_delta"]) != 3 {
+		t.Fatalf("site_receive_cost_delta = %v, want 3", breakdown["site_receive_cost_delta"])
+	}
+}
+
+func TestDistributionReceivePriceNeverAboveMainSite(t *testing.T) {
+	mainReq := fullReceivePricingRequest(50)
+	applyMainSiteReceivePricing(&mainReq, systemconfig.DefaultPublishOptions(), defaultSalePriceConfig(), 0, 0, false)
+	siteReq := fullReceivePricingRequest(50)
+	applyMainSiteReceivePricing(&siteReq, systemconfig.DefaultPublishOptions(), defaultSalePriceConfig(), 0, 10, true)
+	mainPrice := readSummaryNumber(ensurePriceBreakdown(mainReq.AssetSummary)["seller_total_price"])
+	sitePrice := readSummaryNumber(ensurePriceBreakdown(siteReq.AssetSummary)["seller_total_price"])
+	if sitePrice >= mainPrice {
+		t.Fatalf("distribution receive price %v must stay below main-site %v (dead boundary)", sitePrice, mainPrice)
 	}
 }
 

backend/internal/modules/listing/service_mutation.go

@@ -16,8 +16,8 @@ func (s *Service) Create(ctx context.Context, ownerID uint64, req CreateRequest,
 	if len(siteCode) > 0 {
 		effectiveSiteCode = strings.TrimSpace(siteCode[0])
 	}
-	delta, onDistribution := s.repo.ResolveReceiveRatioDelta(ctx, 0, effectiveSiteCode)
-	if err := s.applyMainSiteReceivePricing(ctx, &req, delta, onDistribution); err != nil {
+	delta, onDistribution := s.repo.resolveSiteReceiveCostDelta(ctx, 0, effectiveSiteCode)
+	if err := s.applyMainSiteReceivePricing(ctx, &req, 0, delta, onDistribution); err != nil {
 		return nil, err
 	}
 	rules, err := s.publishRules(ctx)
@@ -49,8 +49,8 @@ func (s *Service) Update(ctx context.Context, ownerID uint64, id uint64, req Upd
 	if len(siteCode) > 0 {
 		effectiveSiteCode = strings.TrimSpace(siteCode[0])
 	}
-	delta, onDistribution := s.repo.ResolveReceiveRatioDelta(ctx, id, effectiveSiteCode)
-	if err := s.applyMainSiteReceivePricing(ctx, &req, delta, onDistribution); err != nil {
+	delta, onDistribution := s.repo.resolveSiteReceiveCostDelta(ctx, id, effectiveSiteCode)
+	if err := s.applyMainSiteReceivePricing(ctx, &req, 0, delta, onDistribution); err != nil {
 		return nil, err
 	}
 	rules, err := s.publishRules(ctx)

backend/internal/modules/listing/service_test.go

@@ -1116,7 +1116,7 @@ func TestCreateDistributionListingUsesMainSiteReceiveRatio(t *testing.T) {
 	}
 }
 
-func TestCreateDistributionListingAppliesSiteReceiveRatioDelta(t *testing.T) {
+func TestCreateDistributionListingAppliesSiteReceiveCostDelta(t *testing.T) {
 	db := database.NewTestDB()
 	if err := database.MigrateListingLifecycleTestSchema(db); err != nil {
 		t.Fatalf("migrate err: %v", err)
@@ -1129,11 +1129,11 @@ func TestCreateDistributionListingAppliesSiteReceiveRatioDelta(t *testing.T) {
 	}
 	site := model.DistributionSite{
 		SiteCode:              "dist_ratio_down",
-		SiteName:              "下调收号站",
+		SiteName:              "压价收号站",
 		Domain:                "ratio-down.example.com",
 		Status:                "active",
 		DisplayAccountEnabled: true,
-		ReceiveRatioDelta:     3,
+		ReceiveCostDelta:      3,
 	}
 	if err := db.Create(&site).Error; err != nil {
 		t.Fatal(err)
@@ -1169,8 +1169,8 @@ func TestCreateDistributionListingAppliesSiteReceiveRatioDelta(t *testing.T) {
 		t.Fatalf("Create failed: %v", err)
 	}
 	pricing := ReceivePricingFromAssetSummary(mustMarshalSummary(t, dto.AssetSummary))
-	if pricing.SellerRatio != 40 {
-		t.Fatalf("seller_ratio = %v, want 40 after site delta 3 below main-site 43", pricing.SellerRatio)
+	if pricing.SellerRatio != 46 {
+		t.Fatalf("seller_ratio = %v, want 46 after site cost delta 3 (R=43+3) under decoupled model", pricing.SellerRatio)
 	}
 }
 

backend/internal/modules/listing/site_receive.go

@@ -7,6 +7,48 @@ import (
 	"hfb_sys/backend/internal/model"
 )
 
+// ReceiveCostDeltaBySiteCode 读取分站收号压价点数（新口径，收号比例 = R + 点数）。
+func (r *Repository) ReceiveCostDeltaBySiteCode(ctx context.Context, siteCode string) float64 {
+	siteCode = strings.TrimSpace(siteCode)
+	if r == nil || r.db == nil || siteCode == "" {
+		return 0
+	}
+	var delta float64
+	_ = r.db.WithContext(ctx).Model(&model.DistributionSite{}).
+		Select("COALESCE(receive_cost_delta, 0)").
+		Where("site_code = ? AND status = 'active'", siteCode).
+		Limit(1).
+		Scan(&delta)
+	return NormalizeSiteReceiveCostDelta(delta)
+}
+
+// resolveSiteReceiveCostDelta 按站点编码或商品归属站点解析压价点数。
+// 返回 onDistribution 表示当前上下文是否为分站（false 时压价不生效）。
+func (r *Repository) resolveSiteReceiveCostDelta(ctx context.Context, listingID uint64, siteCode string) (float64, bool) {
+	if code := strings.TrimSpace(siteCode); code != "" {
+		return r.ReceiveCostDeltaBySiteCode(ctx, code), true
+	}
+	if r == nil || r.db == nil || listingID == 0 {
+		return 0, false
+	}
+	var siteID *uint64
+	if err := r.db.WithContext(ctx).Model(&model.RentalListing{}).
+		Select("distribution_site_id").
+		Where("id = ?", listingID).
+		Limit(1).
+		Scan(&siteID).Error; err != nil || siteID == nil || *siteID == 0 {
+		return 0, false
+	}
+	var delta float64
+	_ = r.db.WithContext(ctx).Model(&model.DistributionSite{}).
+		Select("COALESCE(receive_cost_delta, 0)").
+		Where("id = ? AND status = 'active'", *siteID).
+		Limit(1).
+		Scan(&delta)
+	return NormalizeSiteReceiveCostDelta(delta), true
+}
+
+// ReceiveRatioDeltaBySiteCode 旧口径（加价抢货）读取，保留只读兼容。
 func (r *Repository) ReceiveRatioDeltaBySiteCode(ctx context.Context, siteCode string) float64 {
 	siteCode = strings.TrimSpace(siteCode)
 	if r == nil || r.db == nil || siteCode == "" {
@@ -21,6 +63,7 @@ func (r *Repository) ReceiveRatioDeltaBySiteCode(ctx context.Context, siteCode s
 	return NormalizeSiteReceiveRatioDelta(delta)
 }
 
+// ResolveReceiveRatioDelta 旧口径解析入口，保留供旧快照读侧使用。
 func (r *Repository) ResolveReceiveRatioDelta(ctx context.Context, listingID uint64, siteCode string) (float64, bool) {
 	if code := strings.TrimSpace(siteCode); code != "" {
 		return r.ReceiveRatioDeltaBySiteCode(ctx, code), true

backend/migrations/000072_distribution_site_receive_cost_delta.sql

@@ -0,0 +1,12 @@
+-- +goose Up
+
+-- 分站收号压价点数（新口径）：收号比例 = 主站参考比例 R + cost_delta，比例变大 → 收号价更低。
+-- 卖出价不再跟随收号价联动，锚定主站参考比例推导（解耦），压价差进入 35/40/25 三方分成池。
+-- 旧字段 receive_ratio_delta（加价抢货口径）保留只读，新单不再使用。
+ALTER TABLE distribution_sites
+  ADD COLUMN receive_cost_delta DECIMAL(10,2) NOT NULL DEFAULT 0 COMMENT '分站收号压价点数：收号比例=主站参考比例+点数，点数越大收号价越低，上限20' AFTER receive_ratio_delta;
+
+-- +goose Down
+
+ALTER TABLE distribution_sites
+  DROP COLUMN receive_cost_delta;

distribution-admin/src/api.ts

@@ -129,6 +129,7 @@ export interface Site {
   footer_info_json?: string
   listing_qrcode_url?: string
   receive_ratio_delta?: number
+  receive_cost_delta?: number
   created_at: string
 }
 
@@ -338,7 +339,10 @@ export async function listSites(): Promise<Site[]> {
   return extract(resp).items ?? []
 }
 
-export async function updateSite(siteID: number, payload: Partial<Pick<Site, 'receive_ratio_delta'>>): Promise<Site> {
+export async function updateSite(
+  siteID: number,
+  payload: Partial<Pick<Site, 'receive_ratio_delta' | 'receive_cost_delta'>>
+): Promise<Site> {
   const resp = await api.put<ApiResponse<Site>>(`/distribution/sites/${siteID}`, payload)
   return extract(resp)
 }

distribution-admin/src/pages/SiteSettings.tsx

@@ -84,7 +84,7 @@ export default function SiteSettings() {
     icp: '',
     contact: '',
   })
-  const [receiveRatioDelta, setReceiveRatioDelta] = useState(0)
+  const [receiveCostDelta, setReceiveCostDelta] = useState(0)
   const [savingRatio, setSavingRatio] = useState(false)
 
   // SMS config state
@@ -140,7 +140,7 @@ export default function SiteSettings() {
         } catch {
           setFooterInfo({})
         }
-        setReceiveRatioDelta(Math.max(0, found.receive_ratio_delta || 0))
+        setReceiveCostDelta(Math.max(0, found.receive_cost_delta || 0))
 
         try {
           const sms = await fetchSiteSMSConfig(id)
@@ -234,10 +234,10 @@ export default function SiteSettings() {
     if (!siteID) return
     setSavingRatio(true)
     try {
-      const updated = await updateSite(siteID, { receive_ratio_delta: receiveRatioDelta })
+      const updated = await updateSite(siteID, { receive_cost_delta: receiveCostDelta })
       setCurrentSite(updated)
-      setReceiveRatioDelta(Math.max(0, updated.receive_ratio_delta || 0))
-      message.success('收号比例已保存，本站上传账号将按新比例计价')
+      setReceiveCostDelta(Math.max(0, updated.receive_cost_delta || 0))
+      message.success('收号压价已保存，本站收号价比主站更低，售价与主站一致')
     } catch (error: unknown) {
       const respMessage = (error as { response?: { data?: { message?: string } } })?.response?.data?.message
       message.error(respMessage || '保存收号比例失败')
@@ -421,26 +421,26 @@ export default function SiteSettings() {
         <Space direction="vertical" style={{ width: '100%' }} size="middle">
           <div>
             <Typography.Title level={5} style={{ marginBottom: 4 }}>
-              本站收号比例
+              本站收号压价
             </Typography.Title>
             <Typography.Text type="secondary">
-              主站回收比例是上限。下调点数越大，号主底价越高、本站利润空间越大，但不能高于主站比例。0 表示与主站一致。
+              压价点数越大，号主在本站拿到的收号价越低。买家售价保持与主站一致，压价差进入三方分成（本站 35% / 卖出方 40% / 平台 25%）。0 表示与主站同价收号。
             </Typography.Text>
           </div>
           <Space wrap align="center">
-            <Typography.Text>相对主站下调</Typography.Text>
+            <Typography.Text>收号价比主站低</Typography.Text>
             <InputNumber
               min={0}
               max={20}
               step={0.1}
               precision={1}
-              value={receiveRatioDelta}
-              onChange={(value) => setReceiveRatioDelta(Math.max(0, Number(value || 0)))}
+              value={receiveCostDelta}
+              onChange={(value) => setReceiveCostDelta(Math.max(0, Number(value || 0)))}
               addonAfter="点"
               style={{ width: 160 }}
             />
             <Button type="primary" icon={<SaveOutlined />} loading={savingRatio} onClick={() => void handleSaveReceiveRatio()}>
-              保存收号比例
+              保存收号压价
             </Button>
           </Space>
         </Space>

frontend/src/features/admin/api/adminDistribution.ts

@@ -13,6 +13,7 @@ export interface DistributionSite {
   settlement_hold_days: number
   listing_qrcode_url?: string
   receive_ratio_delta?: number
+  receive_cost_delta?: number
   created_at: string
 }
 
@@ -154,6 +155,7 @@ export async function updateDistributionSite(
       | 'settlement_hold_days'
       | 'listing_qrcode_url'
       | 'receive_ratio_delta'
+      | 'receive_cost_delta'
     >
   >
 ) {

frontend/src/features/admin/views/AdminDistributionSitesView.vue

@@ -59,7 +59,7 @@ const receiveRatioSubmitting = ref(false)
 const receiveRatioForm = reactive({
   site_id: 0,
   site_name: '',
-  receive_ratio_delta: 0,
+  receive_cost_delta: 0,
 })
 
 const qrDialogVisible = ref(false)
@@ -136,7 +136,7 @@ async function handleSettlementSubmit() {
 function handleOpenReceiveRatio(row: DistributionSite) {
   receiveRatioForm.site_id = row.id
   receiveRatioForm.site_name = row.site_name
-  receiveRatioForm.receive_ratio_delta = Number(row.receive_ratio_delta || 0)
+  receiveRatioForm.receive_cost_delta = Number(row.receive_cost_delta || 0)
   receiveRatioDialogVisible.value = true
 }
 
@@ -144,9 +144,9 @@ async function handleReceiveRatioSubmit() {
   receiveRatioSubmitting.value = true
   try {
     await updateDistributionSite(receiveRatioForm.site_id, {
-      receive_ratio_delta: Number(receiveRatioForm.receive_ratio_delta),
+      receive_cost_delta: Number(receiveRatioForm.receive_cost_delta),
     })
-    ElMessage.success(`【${receiveRatioForm.site_name}】收号比例下调已更新`)
+    ElMessage.success(`【${receiveRatioForm.site_name}】收号压价已更新`)
     receiveRatioDialogVisible.value = false
     await loadSites()
   } catch (err) {
@@ -530,15 +530,15 @@ onMounted(() => {
             </el-tag>
           </template>
         </el-table-column>
-        <el-table-column label="收号下调" width="110">
+        <el-table-column label="收号压价" width="110">
           <template #default="{ row }">
             <el-tag
-              :type="Number(row.receive_ratio_delta || 0) > 0 ? 'warning' : 'info'"
+              :type="Number(row.receive_cost_delta || 0) > 0 ? 'warning' : 'info'"
               size="small"
             >
               {{
-                Number(row.receive_ratio_delta || 0) > 0
-                  ? `-${Number(row.receive_ratio_delta).toFixed(1)} 点`
+                Number(row.receive_cost_delta || 0) > 0
+                  ? `低 ${Number(row.receive_cost_delta).toFixed(1)} 点`
                   : '与主站一致'
               }}
             </el-tag>
@@ -758,10 +758,10 @@ onMounted(() => {
       </template>
     </el-dialog>
 
-    <!-- 分站收号比例（主站为上限） -->
+    <!-- 分站收号压价（收号价始终不高于主站参考价） -->
     <el-dialog
       v-model="receiveRatioDialogVisible"
-      title="分站收号比例"
+      title="分站收号压价"
       width="520px"
       destroy-on-close
     >
@@ -769,16 +769,16 @@ onMounted(() => {
         type="info"
         :closable="false"
         show-icon
-        title="主站回收比例是上限。下调点数越大，号主底价越高、分站利润空间越大，但不能高于主站比例。0 表示与主站一致。"
+        title="分站收号价比主站更低：压价点数越大，号主在分站拿到的收号价越低。买家售价保持与主站一致，压价差进入三方分成（35% 收号 / 40% 卖出 / 25% 服务费）。0 表示与主站同价收号。"
         style="margin-bottom: 16px"
       />
       <el-form label-width="110px">
         <el-form-item label="分销站点">
           <el-input :model-value="receiveRatioForm.site_name" disabled />
         </el-form-item>
-        <el-form-item label="相对主站下调">
+        <el-form-item label="收号价比主站低">
           <el-input-number
-            v-model="receiveRatioForm.receive_ratio_delta"
+            v-model="receiveRatioForm.receive_cost_delta"
             :min="0"
             :max="20"
             :step="0.1"

frontend/src/features/seller/composables/usePublishForm.ts

@@ -58,6 +58,7 @@ export function usePublishForm(options: UsePublishFormOptions) {
   const siteStore = useDistributionSiteStore()
   const isDistribution = computed(() => siteStore.isDistribution)
   const receiveRatioDelta = computed(() => Number(siteStore.receiveRatioDelta || 0))
+  const receiveCostDelta = computed(() => Number(siteStore.receiveCostDelta || 0))
   const loading = ref(false)
   const uploading = ref(false)
   const suppressDraftSave = ref(false)
@@ -95,6 +96,7 @@ export function usePublishForm(options: UsePublishFormOptions) {
     selectedSkins,
     isDistribution,
     receiveRatioDelta,
+    receiveCostDelta,
   })
 
   // ========== 上号方式互斥 ==========

frontend/src/shared/composables/usePricingCalculator.ts

@@ -19,11 +19,10 @@ import {
   hasAcceleratedSaleRatioInput as hasAcceleratedSaleRatioValue,
   isQuantityItemDisabledForInsurance,
   readFinalSaleRatio,
-  applySiteReceiveRatioDelta,
+  applySiteReceiveCostDelta,
   roundMoney,
   roundRatio,
 } from '@/shared/utils/pricing'
-
 export function usePricingCalculator(options: {
   publishOptions: Ref<ListingPublishOptions>
   salePriceConfig: Ref<PublishSalePriceConfig>
@@ -34,6 +33,7 @@ export function usePricingCalculator(options: {
   selectedSkins: Ref<string[]>
   isDistribution?: Ref<boolean>
   receiveRatioDelta?: Ref<number>
+  receiveCostDelta?: Ref<number>
 }) {
   const serverOptions = computed(() => options.publishOptions.value.server_options)
   const faceOptions = computed(() => options.publishOptions.value.face_options)
@@ -91,12 +91,17 @@ export function usePricingCalculator(options: {
   const siteReceiveRatioDelta = computed(() =>
     Math.max(0, Number(options.receiveRatioDelta?.value || 0))
   )
+  const siteReceiveCostDelta = computed(() =>
+    Math.max(0, Number(options.receiveCostDelta?.value || 0))
+  )
+  // 分站新口径：收号价按「R + 压价点数」计算（压价收号）；买家定价仍按主站口径推导。
+  // 买卖两侧解耦：calculatedRatio 决定号主收号价，anchorRatio 决定买家价基准。
   const calculatedRatio = computed(() => {
     if (calculatedDefaultSaleRatio.value <= 0) return 0
     if (options.isDistribution?.value) {
-      return applySiteReceiveRatioDelta(
+      return applySiteReceiveCostDelta(
         calculatedDefaultSaleRatio.value,
-        siteReceiveRatioDelta.value
+        siteReceiveCostDelta.value
       )
     }
     return readFinalSaleRatio(
@@ -105,10 +110,19 @@ export function usePricingCalculator(options: {
       maxAcceleratedSaleRatio.value
     )
   })
+  const anchorRatio = computed(() => {
+    if (calculatedDefaultSaleRatio.value <= 0) return 0
+    if (options.isDistribution?.value) return calculatedDefaultSaleRatio.value
+    return calculatedRatio.value
+  })
   const calculatedCoinBasePrice = computed(() => {
     if (calculatedRatio.value <= 0) return 0
     return roundMoney(coinWanAmount.value / calculatedRatio.value)
   })
+  const anchorCoinBasePrice = computed(() => {
+    if (anchorRatio.value <= 0) return 0
+    return roundMoney(coinWanAmount.value / anchorRatio.value)
+  })
   const calculatedConsumablePrice = computed(() =>
     calculateConsumablePrice({
       quantityItems: quantityItems.value,
@@ -122,13 +136,18 @@ export function usePricingCalculator(options: {
       ? roundMoney(calculatedCoinBasePrice.value + calculatedConsumablePrice.value)
       : 0
   )
+  const anchorSellerPrice = computed(() =>
+    anchorRatio.value > 0
+      ? roundMoney(anchorCoinBasePrice.value + calculatedConsumablePrice.value)
+      : 0
+  )
   const calculatedPlatformPricing = computed(() =>
     calculatePlatformPricing({
       coinMAmount: coinMAmount.value,
       coinWanAmount: coinWanAmount.value,
-      sellerRatio: calculatedRatio.value,
-      sellerCoinBasePrice: calculatedCoinBasePrice.value,
-      sellerTotalPrice: calculatedSellerPrice.value,
+      sellerRatio: anchorRatio.value,
+      sellerCoinBasePrice: anchorCoinBasePrice.value,
+      sellerTotalPrice: anchorSellerPrice.value,
       consumablePrice: calculatedConsumablePrice.value,
       salePriceConfig: options.salePriceConfig.value,
     })
@@ -212,6 +231,7 @@ export function usePricingCalculator(options: {
     calculatedDefaultSaleRatio,
     maxAcceleratedSaleRatio,
     siteReceiveRatioDelta,
+    siteReceiveCostDelta,
     calculatedRatio,
     calculatedCoinBasePrice,
     calculatedConsumablePrice,

frontend/src/shared/utils/pricing.ts

@@ -165,6 +165,16 @@ export function applySiteReceiveRatioDelta(referenceRatio: number, delta: number
   return roundRatio(Math.max(referenceRatio - safeDelta, 0.01))
 }
 
+/**
+ * 分站收号压价（新口径）：收号比例 = 主站参考比例 R + 点数，比例变大 → 收号价更低。
+ * 买家价已解耦，不再从收号比例推导，始终锚定主站参考口径。
+ */
+export function applySiteReceiveCostDelta(referenceRatio: number, delta: number) {
+  if (referenceRatio <= 0) return 0
+  const safeDelta = Math.min(20, Math.max(0, Number(delta) || 0))
+  return roundRatio(referenceRatio + safeDelta)
+}
+
 export function hasAcceleratedSaleRatioInput(value: number | '' | null | undefined) {
   const ratio = Number(value)
   return (

frontend/src/stores/distributionSite.ts

@@ -28,6 +28,7 @@ export interface DistributionSiteInfo {
   announcements_json?: string
   footer_info_json?: string
   receive_ratio_delta?: number
+  receive_cost_delta?: number
 }
 
 /**
@@ -74,6 +75,7 @@ export const useDistributionSiteStore = defineStore('distributionSite', {
       announcements: [] as string[],
       footerInfo: null as DistributionFooterInfo | null,
       receiveRatioDelta: 0,
+      receiveCostDelta: 0,
       initialized: false,
     }
   },
@@ -178,6 +180,7 @@ export const useDistributionSiteStore = defineStore('distributionSite', {
           }
 
           this.receiveRatioDelta = Math.max(0, Number(info.receive_ratio_delta || 0))
+          this.receiveCostDelta = Math.max(0, Number(info.receive_cost_delta || 0))
 
           sessionStorage.setItem('hfb_site_code', this.siteCode)
           sessionStorage.setItem('hfb_site_name', this.siteName)
@@ -217,6 +220,7 @@ export const useDistributionSiteStore = defineStore('distributionSite', {
       this.announcements = []
       this.footerInfo = null
       this.receiveRatioDelta = 0
+      this.receiveCostDelta = 0
       sessionStorage.removeItem('hfb_site_code')
       sessionStorage.removeItem('hfb_site_name')
       localStorage.removeItem('hfb_site_code')