diff --git a/frontend/src/features/usage/components/UsageModelDisplay.vue b/frontend/src/features/usage/components/UsageModelDisplay.vue
index 64b277497..4d83ff1c7 100644
--- a/frontend/src/features/usage/components/UsageModelDisplay.vue
+++ b/frontend/src/features/usage/components/UsageModelDisplay.vue
@@ -140,7 +140,7 @@ const modelBadges = computed<ModelBadgePresentation[]>(() => {
     badges.push({
       key: 'fast',
       label: 'Fast',
-      className: 'border-amber-400/50 bg-transparent text-amber-700 dark:border-amber-300/40 dark:text-amber-300',
+      className: 'border-amber-400/50 !bg-transparent text-amber-700 dark:border-amber-300/40 dark:text-amber-300',
       title: '上游请求档位：Fast\n计费档位：Fast',
       ariaLabel: '上游请求档位：Fast，计费档位：Fast',
     })
diff --git a/frontend/src/features/usage/components/UsageRecordsTable.vue b/frontend/src/features/usage/components/UsageRecordsTable.vue
index 78c4ef795..d5f0c8f8f 100644
--- a/frontend/src/features/usage/components/UsageRecordsTable.vue
+++ b/frontend/src/features/usage/components/UsageRecordsTable.vue
@@ -1579,7 +1579,7 @@ function buildServiceTierBadgePresentation(
   const title = titleLines.join('\n')
   return {
     label: 'Fast',
-    className: 'border-amber-400/50 bg-transparent text-amber-700 dark:border-amber-300/40 dark:text-amber-300',
+    className: 'border-amber-400/50 !bg-transparent text-amber-700 dark:border-amber-300/40 dark:text-amber-300',
     title,
     ariaLabel: titleLines.join('，'),
   }
diff --git a/frontend/src/features/usage/components/__tests__/UsageRecordsTable.spec.ts b/frontend/src/features/usage/components/__tests__/UsageRecordsTable.spec.ts
index 579a16408..ce331ce54 100644
--- a/frontend/src/features/usage/components/__tests__/UsageRecordsTable.spec.ts
+++ b/frontend/src/features/usage/components/__tests__/UsageRecordsTable.spec.ts
@@ -340,7 +340,8 @@ describe('UsageRecordsTable', () => {
     expect(reasoningBadge?.classList.contains('bg-primary/5')).toBe(true)
     expect(reasoningBadge?.classList.contains('text-primary')).toBe(true)
     expect(fastBadge?.classList.contains('border-amber-400/50')).toBe(true)
-    expect(fastBadge?.classList.contains('bg-transparent')).toBe(true)
+    expect(fastBadge?.classList.contains('!bg-transparent')).toBe(true)
+    expect(fastBadge?.classList.contains('bg-transparent')).toBe(false)
     expect(fastBadge?.classList.contains('bg-amber-400/10')).toBe(false)
     expect(fastBadge?.classList.contains('text-amber-700')).toBe(true)
     expect(cyberBadge?.classList.contains('border-primary/30')).toBe(true)