diff --git a/services/game-service/internal/service/game/service.go b/services/game-service/internal/service/game/service.go
index 81330832..b58c90dd 100644
--- a/services/game-service/internal/service/game/service.go
+++ b/services/game-service/internal/service/game/service.go
@@ -1007,8 +1007,9 @@ func buildLaunchURL(game gamedomain.LaunchableGame, session gamedomain.LaunchSes
 		query.Set("session", token)
 		query.Set("gameId", strings.TrimSpace(session.ProviderGameID))
 		query.Set("game_id", strings.TrimSpace(session.ProviderGameID))
-		query.Set("callbackBase", "/api/v1/zgame/callback")
-		query.Set("callback_base", "/api/v1/zgame/callback")
+		callbackBase := config.CallbackBaseValue()
+		query.Set("callbackBase", callbackBase)
+		query.Set("callback_base", callbackBase)
 		if config.DefaultLang != "" {
 			query.Set("lang", config.DefaultLang)
 		}
diff --git a/services/game-service/internal/service/game/service_test.go b/services/game-service/internal/service/game/service_test.go
index 7db50a53..07d39846 100644
--- a/services/game-service/internal/service/game/service_test.go
+++ b/services/game-service/internal/service/game/service_test.go
@@ -567,6 +567,7 @@ func TestLaunchGameBuildsZGameURL(t *testing.T) {
 				"token_ttl_seconds":7200,
 				"uid_mode":"display_user_id",
 				"merchant_payload":"room_game",
+				"callback_base":"https://api.example.test/api/v1/zgame/callback",
 				"bridge_script_url":"https://cdn.example/zgame-bridge.js",
 				"bridge_script_version":"20260629.1",
 				"game_urls":{"1001":"https://zgame.example/h5/1001"}
@@ -607,8 +608,8 @@ func TestLaunchGameBuildsZGameURL(t *testing.T) {
 		"session":               token,
 		"gameId":                "1001",
 		"game_id":               "1001",
-		"callbackBase":          "/api/v1/zgame/callback",
-		"callback_base":         "/api/v1/zgame/callback",
+		"callbackBase":          "https://api.example.test/api/v1/zgame/callback",
+		"callback_base":         "https://api.example.test/api/v1/zgame/callback",
 		"lang":                  "en",
 		"roomId":                "room_1",
 		"room_id":               "room_1",
diff --git a/services/game-service/internal/service/game/zgame_adapter.go b/services/game-service/internal/service/game/zgame_adapter.go
index 3af181d6..541ae5ef 100644
--- a/services/game-service/internal/service/game/zgame_adapter.go
+++ b/services/game-service/internal/service/game/zgame_adapter.go
@@ -38,6 +38,9 @@ type zgameAdapterConfig struct {
 	// game_urls 支持 ZGame 每款游戏独立 H5 地址；launch_url_template 用于批量上新时按 provider_game_id 生成地址。
 	GameURLs          map[string]string `json:"game_urls"`
 	LaunchURLTemplate string            `json:"launch_url_template"`
+	// callback_base 可按环境覆盖为完整公网 HTTPS 地址，避免 H5 在第三方域名下把相对路径解析到厂商域名。
+	CallbackBase      string `json:"callback_base"`
+	CallbackBaseAlias string `json:"callbackBase"`
 	// merchant_payload 是 ZGame consume 回调的透传字段来源；只参与厂商回传，不进入内部业务判断。
 	MerchantPayload string `json:"merchant_payload"`
 	// level/gender 是 ZGame 用户资料响应里的展示字段；真实等级接入前保持显式默认值，避免从其它体系误推。
@@ -58,6 +61,7 @@ func zgameConfigFromPlatform(value any) zgameAdapterConfig {
 	config.UIDMode = strings.ToLower(strings.TrimSpace(config.UIDMode))
 	config.DefaultLang = strings.TrimSpace(config.DefaultLang)
 	config.LaunchURLTemplate = strings.TrimSpace(config.LaunchURLTemplate)
+	config.CallbackBase = strings.TrimSpace(firstNonEmpty(config.CallbackBase, config.CallbackBaseAlias))
 	config.MerchantPayload = strings.TrimSpace(config.MerchantPayload)
 	config.GameURLs = normalizeStringMap(config.GameURLs)
 	return config
@@ -70,6 +74,13 @@ func (c zgameAdapterConfig) TokenTTL() time.Duration {
 	return zgameDefaultTokenTTL
 }
 
+func (c zgameAdapterConfig) CallbackBaseValue() string {
+	if c.CallbackBase != "" {
+		return c.CallbackBase
+	}
+	return "/api/v1/zgame/callback"
+}
+
 func zgameLaunchBaseURL(game gamedomain.LaunchableGame, config zgameAdapterConfig) string {
 	for _, key := range []string{game.ProviderGameID, game.GameID, strings.ToLower(game.GameID)} {
 		if raw := strings.TrimSpace(config.GameURLs[strings.TrimSpace(key)]); raw != "" {