diff --git a/apps/web/src/pages/products/detailUtils.ts b/apps/web/src/pages/products/detailUtils.ts
new file mode 100644
index 000000000..52d11b67a
--- /dev/null
+++ b/apps/web/src/pages/products/detailUtils.ts
@@ -0,0 +1,27 @@
+/** 格式化时长（秒 → "MM:SS"） */
+export const formatDuration = (seconds: number): string => {
+  if (!seconds || seconds <= 0) return "00:00"
+  const m = Math.floor(seconds / 60)
+  const s = Math.floor(seconds % 60)
+  return `${String(m).padStart(2, "0")}:${String(s).padStart(2, "0")}`
+}
+
+/** 格式化文件大小（MB） */
+export const formatFileSize = (mb: number): string => {
+  if (!mb || mb <= 0) return "-"
+  if (mb < 1024) return `${mb.toFixed(1)} MB`
+  return `${(mb / 1024).toFixed(2)} GB`
+}
+
+/** 格式化日期 */
+export const formatDate = (dateStr: string): string => {
+  if (!dateStr) return "-"
+  const d = new Date(dateStr)
+  return d.toLocaleDateString("zh-CN", {
+    year: "numeric",
+    month: "2-digit",
+    day: "2-digit",
+    hour: "2-digit",
+    minute: "2-digit",
+  })
+}