diff --git a/apps/web/lib/version-plan.ts b/apps/web/lib/version-plan.ts
index 0891620..59ee789 100644
--- a/apps/web/lib/version-plan.ts
+++ b/apps/web/lib/version-plan.ts
@@ -55,9 +55,10 @@ export function calcPlanDuration(start: string, end: string): { days: number; ho
 }
 
 export function formatDuration(days: number, hours: number): string {
-  if (hours > 0) return `${hours}h`;
-  if (days === 0) return '0天';
-  return `${days}天`;
+  if (hours <= 0) return '0h';
+  if (hours < 24) return `${hours}h`;
+  if (hours % 24 === 0) return `${hours / 24}天`;
+  return `${hours}h`;
 }
 
 export function calcTotalDuration(plans: VersionPlan[]): string {