diff --git a/app/admin/apis/shopee_product_spec.go b/app/admin/apis/shopee_product_spec.go
new file mode 100644
index 0000000..0c7d2f5
--- /dev/null
+++ b/app/admin/apis/shopee_product_spec.go
@@ -0,0 +1,146 @@
+package apis
+
+import (
+	"bytes"
+	"context"
+	"encoding/json"
+	"fmt"
+	"net/http"
+	"strings"
+	"time"
+
+	"github.com/gin-gonic/gin"
+
+	"go-admin/internal/huohanhan"
+)
+
+type productSpec struct {
+	Color []string `json:"color"`
+	Size  []string `json:"size"`
+}
+
+type productVariation struct {
+	VariationName       string `json:"variationName"`
+	VariationOptionList []struct {
+		VariationOptionName string `json:"variationOptionName"`
+	} `json:"variationOptionList"`
+}
+
+// GetSpecByShopeeID reads the current Huohanhan detail without asking
+// Huohanhan to synchronize the product from Shopee first.
+func (e ShopeeProduct) GetSpecByShopeeID(c *gin.Context) {
+	e.MakeContext(c)
+	want := strings.TrimSpace(c.Param("shopeeId"))
+	if want == "" {
+		e.Error(http.StatusBadRequest, fmt.Errorf("shopeeId is required"), "参数错误")
+		return
+	}
+	if !ValidateAPIKey(c) {
+		e.Error(http.StatusUnauthorized, fmt.Errorf("invalid api key"), "未授权")
+		return
+	}
+
+	ctx, cancel := context.WithTimeout(c.Request.Context(), 120*time.Second)
+	defer cancel()
+	client, err := e.newHuohanhanClient()
+	if err != nil {
+		e.Error(http.StatusInternalServerError, err, "客户端初始化失败")
+		return
+	}
+	page, err := client.GetProductPage(ctx, huohanhan.ProductPageParams{
+		Size: 1, Current: 1, ItemIDs: want, IncludeAllStatuses: true,
+	})
+	if err != nil {
+		e.Error(http.StatusBadGateway, err, "货憨憨请求失败")
+		return
+	}
+
+	internalID := ""
+	for i := range page.Records {
+		if strings.TrimSpace(page.Records[i].ItemID) == want {
+			internalID = strings.TrimSpace(page.Records[i].ID)
+			break
+		}
+	}
+	if internalID == "" {
+		e.Error(http.StatusNotFound, fmt.Errorf("product not found"), "未找到商品")
+		return
+	}
+
+	detail, err := client.GetProductDetail(ctx, internalID)
+	if err != nil {
+		e.Error(http.StatusBadGateway, err, "货憨憨商品详情请求失败")
+		return
+	}
+	itemID, err := detail.ItemID()
+	if err != nil || strings.TrimSpace(itemID) != want {
+		if err == nil {
+			err = fmt.Errorf("商品详情 ID 与查询条件不一致")
+		}
+		e.Error(http.StatusBadGateway, err, "商品详情格式错误")
+		return
+	}
+	itemInfo, err := detail.ItemInfo()
+	if err != nil {
+		e.Error(http.StatusBadGateway, err, "商品详情格式错误")
+		return
+	}
+	spec, err := extractProductSpec(itemInfo)
+	if err != nil {
+		e.Error(http.StatusBadGateway, err, "商品规格格式错误")
+		return
+	}
+
+	// The endpoint intentionally exposes only the two requested spec lists.
+	c.JSON(http.StatusOK, gin.H{"data": spec})
+}
+
+func extractProductSpec(itemInfo json.RawMessage) (productSpec, error) {
+	spec := productSpec{Color: make([]string, 0), Size: make([]string, 0)}
+	var fields map[string]json.RawMessage
+	decoder := json.NewDecoder(bytes.NewReader(itemInfo))
+	decoder.UseNumber()
+	if err := decoder.Decode(&fields); err != nil || fields == nil {
+		if err == nil {
+			err = fmt.Errorf("itemInfo 不是对象")
+		}
+		return spec, err
+	}
+
+	raw := fields["standardiseTierVariation"]
+	if len(bytes.TrimSpace(raw)) == 0 || bytes.Equal(bytes.TrimSpace(raw), []byte("null")) {
+		return spec, nil
+	}
+	var variations []productVariation
+	if err := json.Unmarshal(raw, &variations); err != nil {
+		return spec, fmt.Errorf("standardiseTierVariation 格式不正确：%w", err)
+	}
+
+	colorSeen := make(map[string]struct{})
+	sizeSeen := make(map[string]struct{})
+	for _, variation := range variations {
+		name := strings.ToLower(strings.TrimSpace(variation.VariationName))
+		var target *[]string
+		var seen map[string]struct{}
+		switch {
+		case strings.Contains(name, "颜色"), strings.Contains(name, "顏色"), strings.Contains(name, "color"):
+			target, seen = &spec.Color, colorSeen
+		case strings.Contains(name, "尺码"), strings.Contains(name, "尺碼"), strings.Contains(name, "size"):
+			target, seen = &spec.Size, sizeSeen
+		default:
+			continue
+		}
+		for _, option := range variation.VariationOptionList {
+			value := strings.TrimSpace(option.VariationOptionName)
+			if value == "" {
+				continue
+			}
+			if _, exists := seen[value]; exists {
+				continue
+			}
+			seen[value] = struct{}{}
+			*target = append(*target, value)
+		}
+	}
+	return spec, nil
+}
diff --git a/app/admin/apis/shopee_product_spec_test.go b/app/admin/apis/shopee_product_spec_test.go
new file mode 100644
index 0000000..851000c
--- /dev/null
+++ b/app/admin/apis/shopee_product_spec_test.go
@@ -0,0 +1,42 @@
+package apis
+
+import (
+	"encoding/json"
+	"reflect"
+	"testing"
+)
+
+func TestExtractProductSpec(t *testing.T) {
+	raw := json.RawMessage(`{
+      "standardiseTierVariation": [
+        {"variationName":"顏色分類","variationOptionList":[
+          {"variationOptionName":"黑色 微喇褲夏款"},
+          {"variationOptionName":"黑色 微喇褲夏款"}
+        ]},
+        {"variationName":"尺碼","variationOptionList":[
+          {"variationOptionName":"4XL 77.5-87.5公斤"}
+        ]}
+      ]
+    }`)
+
+	got, err := extractProductSpec(raw)
+	if err != nil {
+		t.Fatalf("extractProductSpec() error = %v", err)
+	}
+	if want := []string{"黑色 微喇褲夏款"}; !reflect.DeepEqual(got.Color, want) {
+		t.Fatalf("color = %#v, want %#v", got.Color, want)
+	}
+	if want := []string{"4XL 77.5-87.5公斤"}; !reflect.DeepEqual(got.Size, want) {
+		t.Fatalf("size = %#v, want %#v", got.Size, want)
+	}
+}
+
+func TestExtractProductSpecWithoutVariationsReturnsEmptyArrays(t *testing.T) {
+	got, err := extractProductSpec(json.RawMessage(`{"itemId":"24720421377"}`))
+	if err != nil {
+		t.Fatalf("extractProductSpec() error = %v", err)
+	}
+	if got.Color == nil || got.Size == nil || len(got.Color) != 0 || len(got.Size) != 0 {
+		t.Fatalf("expected non-nil empty arrays, got %#v", got)
+	}
+}
diff --git a/app/admin/router/shopee_product.go b/app/admin/router/shopee_product.go
index b8153de..c1c0345 100644
--- a/app/admin/router/shopee_product.go
+++ b/app/admin/router/shopee_product.go
@@ -14,6 +14,7 @@ func init() {
 func registerShopeeProductRouter(v1 *gin.RouterGroup) {
 	a := apis.ShopeeProduct{}
 	v1.GET("/shopee/products/:shopeeId", a.GetByShopeeID)
+	v1.GET("/shopee/product/spec/:shopeeId", a.GetSpecByShopeeID)
 	v1.POST("/shopee/products/:shopeeId/sync", a.SyncByShopeeID)
 	v1.POST("/shopee/products/:shopeeId/sync-wait", a.SyncWaitByShopeeID)
 	v1.POST("/shopee/products/:shopeeId/sync-if-stale", a.SyncIfStaleByShopeeID)
diff --git a/http-client-cli_file/shopee_product_spec.http b/http-client-cli_file/shopee_product_spec.http
new file mode 100644
index 0000000..b789c97
--- /dev/null
+++ b/http-client-cli_file/shopee_product_spec.http
@@ -0,0 +1,8 @@
+### 查询商品颜色和尺码（不会触发 Shopee 同步）
+GET http://127.0.0.1:8020/api/v1/shopee/product/spec/24720421377?apikey={{apiKey}}
+Accept: application/json
+
+### 使用请求头传递 API Key
+GET http://127.0.0.1:8020/api/v1/shopee/product/spec/24720421377
+Accept: application/json
+X-API-Key: {{apiKey}}
diff --git a/tickets/LOCAL-015-shopee-product-spec-api.md b/tickets/LOCAL-015-shopee-product-spec-api.md
new file mode 100644
index 0000000..36642d1
--- /dev/null
+++ b/tickets/LOCAL-015-shopee-product-spec-api.md
@@ -0,0 +1,18 @@
+# LOCAL-015：Shopee 商品颜色尺码接口
+
+## 目标
+
+增加 `GET /api/v1/shopee/product/spec/{shopeeId}`，直接读取 Huohanhan 商品详情，不触发 Shopee 同步，只返回颜色和尺码数组。
+
+## 验收标准
+
+- 支持通过 `X-API-Key` 请求头或 `apikey` 查询参数认证。
+- 使用 Shopee ID 定位 Huohanhan 商品并读取详情。
+- 不调用 Shopee 商品同步接口。
+- 从 `itemInfo.standardiseTierVariation` 提取颜色和尺码，去重并保留原顺序。
+- 成功响应只包含 `data.color` 和 `data.size`。
+- 缺少规格时返回空数组，不返回 `null`。
+
+## 状态
+
+已完成。