diff --git a/game/smoke/smoke_all.gd b/game/smoke/smoke_all.gd
index 220f74bb..ee05c892 100644
--- a/game/smoke/smoke_all.gd
+++ b/game/smoke/smoke_all.gd
@@ -238,6 +238,14 @@ func _topmost_visible_layer(main: Node) -> Node:
 	return best
 
 
+# 渲染面可见按钮递归计数（V2d mn1/mn2 变异锚——句柄缝盲区闭合）
+func _count_visible_buttons(node: Node) -> int:
+	var n := 1 if (node is Button and node.visible) else 0
+	for c in node.get_children():
+		n += _count_visible_buttons(c)
+	return n
+
+
 # ---- boot 链路时序后置条件（启动态六断言；只立行为可判断言，不造假时序）----
 func _smoke_boot_chain() -> void:
 	print("--- 迭代28 T2 boot 链路时序后置条件（V2：六断言）---")
@@ -289,6 +297,8 @@ func _smoke_boot_chain() -> void:
 	for old_btn in ["lvbtn", "resumebtn", "campbtn", "careerbtn"]:
 		check(not (old_btn in main._menu_screen),
 			"V2d 四旧钮句柄零命中·%s（彻底撤出——禁隐藏态禁置灰态残留）〔卡② mn2〕" % old_btn)
+	check(_count_visible_buttons(main._start_overlay) == 3,
+		"V2d 渲染面可见按钮计数==3（旧钮接回即红——渲染面锚，句柄缝盲区闭合）〔卡② mn1/mn2〕")
 	# ⑤ 闲时会话（_ready 即建、永非 null、在树）
 	check(main.run_scope != null and not main.run_scope.is_adventure and main.run_scope.is_inside_tree(),
 		"V2e run_scope 非空且为闲时会话（is_adventure=false+is_inside_tree）〔装配生命批 V2〕")