diff --git a/domain/src/main/kotlin/com/flagship/abox/manager/domain/infrared/AddVirtualRemoteKey.kt b/domain/src/main/kotlin/com/flagship/abox/manager/domain/infrared/AddVirtualRemoteKey.kt
index 26cb835..9e5d46d 100644
--- a/domain/src/main/kotlin/com/flagship/abox/manager/domain/infrared/AddVirtualRemoteKey.kt
+++ b/domain/src/main/kotlin/com/flagship/abox/manager/domain/infrared/AddVirtualRemoteKey.kt
@@ -25,8 +25,11 @@ class AddVirtualRemoteKey(
         val buttonId = "CUSTOM_" + UUID.randomUUID().toString().take(8).uppercase()
         val assignedSlot = if (remote.transmissionMode == TransmissionMode.STATIC_SLOTS) {
             // Find next available slot
-            val bindings = (repository.getKeyBindings(remoteId) as? DomainResult.Success)?.value.orEmpty()
-            val usedSlots = bindings.mapNotNull { it.assignedSlot?.toIntOrNull() }.toSet()
+            val quota = when (val result = repository.slotQuota(profileId, remote.deviceName)) {
+                is DomainResult.Success -> result.value
+                is DomainResult.Failure -> return result
+            }
+            val usedSlots = quota.assignedStaticSlots
             val nextSlot = (1..99).firstOrNull { it !in usedSlots }
                 ?: return DomainResult.Failure(DomainError.InvalidRequest(detail = "槽位配额已满，无法分配静态槽位"))
             nextSlot.toString()
diff --git a/domain/src/main/kotlin/com/flagship/abox/manager/domain/infrared/LearnVirtualRemoteKey.kt b/domain/src/main/kotlin/com/flagship/abox/manager/domain/infrared/LearnVirtualRemoteKey.kt
index fb453a3..5b6f3e2 100644
--- a/domain/src/main/kotlin/com/flagship/abox/manager/domain/infrared/LearnVirtualRemoteKey.kt
+++ b/domain/src/main/kotlin/com/flagship/abox/manager/domain/infrared/LearnVirtualRemoteKey.kt
@@ -26,9 +26,13 @@ class LearnVirtualRemoteKey(
             ?: return DomainResult.Failure(DomainError.InvalidRequest(detail = "Button not found"))
 
         val targetSlot = binding.assignedSlot ?: run {
-            val allBindings = (repository.getKeyBindings(remoteId) as? DomainResult.Success)?.value.orEmpty()
-            val usedSlots = allBindings.mapNotNull { it.assignedSlot?.toIntOrNull() }.toSet()
-            val nextSlot = (1..99).firstOrNull { it !in usedSlots } ?: 1
+            val quota = when (val result = repository.slotQuota(profileId, remote.deviceName)) {
+                is DomainResult.Success -> result.value
+                is DomainResult.Failure -> return result
+            }
+            val nextSlot = quota.availableStaticSlots.firstOrNull() ?: return DomainResult.Failure(
+                DomainError.InvalidRequest(detail = "槽位配额已满，无法分配静态槽位"),
+            )
             nextSlot.toString()
         }
 
diff --git a/domain/src/main/kotlin/com/flagship/abox/manager/domain/infrared/VirtualRemoteRepository.kt b/domain/src/main/kotlin/com/flagship/abox/manager/domain/infrared/VirtualRemoteRepository.kt
index fb9e622..53ff586 100644
--- a/domain/src/main/kotlin/com/flagship/abox/manager/domain/infrared/VirtualRemoteRepository.kt
+++ b/domain/src/main/kotlin/com/flagship/abox/manager/domain/infrared/VirtualRemoteRepository.kt
@@ -4,6 +4,7 @@ import com.flagship.abox.manager.domain.DeviceName
 import com.flagship.abox.manager.domain.DomainResult
 import com.flagship.abox.manager.domain.ProviderProfileId
 import kotlinx.coroutines.flow.Flow
+import kotlinx.coroutines.flow.first
 
 interface VirtualRemoteRepository {
     fun observeRemotes(
@@ -25,6 +26,11 @@ interface VirtualRemoteRepository {
         deviceName: DeviceName,
     ): Flow<DomainResult<SlotQuotaSummary>>
 
+    suspend fun slotQuota(
+        profileId: ProviderProfileId,
+        deviceName: DeviceName,
+    ): DomainResult<SlotQuotaSummary> = observeSlotQuota(profileId, deviceName).first()
+
     suspend fun getRemote(
         profileId: ProviderProfileId,
         remoteId: VirtualRemoteId,
diff --git a/domain/src/test/kotlin/com/flagship/abox/manager/domain/infrared/VirtualRemoteUseCaseTest.kt b/domain/src/test/kotlin/com/flagship/abox/manager/domain/infrared/VirtualRemoteUseCaseTest.kt
index d507536..a8bed9c 100644
--- a/domain/src/test/kotlin/com/flagship/abox/manager/domain/infrared/VirtualRemoteUseCaseTest.kt
+++ b/domain/src/test/kotlin/com/flagship/abox/manager/domain/infrared/VirtualRemoteUseCaseTest.kt
@@ -116,4 +116,46 @@ class VirtualRemoteUseCaseTest {
         val fetched = (repository.getRemote(profileId, remoteId) as DomainResult.Success<VirtualRemote?>).value
         assertEquals(null, fetched)
     }
+
+    @Test
+    fun staticKeyAllocationUsesSlotsAcrossRemotesOnTheSameHardware() = runTest {
+        val firstRemote = VirtualRemote(
+            id = VirtualRemoteId("remote-one"),
+            profileId = profileId,
+            deviceName = deviceName,
+            displayName = "First",
+            type = RemoteDeviceType.TV,
+            transmissionMode = TransmissionMode.STATIC_SLOTS,
+            createdAtEpochMillis = 1L,
+            updatedAtEpochMillis = 1L,
+        )
+        repository.createRemote(
+            firstRemote,
+            listOf(
+                RemoteKeyBinding(
+                    id = "binding-one",
+                    remoteId = firstRemote.id,
+                    profileId = profileId,
+                    buttonId = "POWER",
+                    displayName = "Power",
+                    assignedSlot = "1",
+                ),
+            ),
+        )
+        val secondRemote = VirtualRemote(
+            id = VirtualRemoteId("remote-two"),
+            profileId = profileId,
+            deviceName = deviceName,
+            displayName = "Second",
+            type = RemoteDeviceType.TV,
+            transmissionMode = TransmissionMode.STATIC_SLOTS,
+            createdAtEpochMillis = 2L,
+            updatedAtEpochMillis = 2L,
+        )
+        repository.createRemote(secondRemote, emptyList())
+
+        val result = AddVirtualRemoteKey(repository)(profileId, secondRemote.id, "Volume")
+
+        assertEquals("2", (result as DomainResult.Success).value.assignedSlot)
+    }
 }