diff --git a/src/dotnet/QuantEngine.Web/Pages/Admin/Collection/Detail.cshtml b/src/dotnet/QuantEngine.Web/Pages/Admin/Collection/Detail.cshtml
index 151b6e40..c08c7463 100644
--- a/src/dotnet/QuantEngine.Web/Pages/Admin/Collection/Detail.cshtml
+++ b/src/dotnet/QuantEngine.Web/Pages/Admin/Collection/Detail.cshtml
@@ -1,4 +1,4 @@
-@page "{runId}"
+@page "{runId?}"
 @model QuantEngine.Web.Pages.Admin.Collection.DetailModel
 @{
     ViewData["Title"] = "수집 실행 상세";
diff --git a/src/dotnet/QuantEngine.Web/Pages/Admin/Collection/Detail.cshtml.cs b/src/dotnet/QuantEngine.Web/Pages/Admin/Collection/Detail.cshtml.cs
index fec419c0..e508d168 100644
--- a/src/dotnet/QuantEngine.Web/Pages/Admin/Collection/Detail.cshtml.cs
+++ b/src/dotnet/QuantEngine.Web/Pages/Admin/Collection/Detail.cshtml.cs
@@ -1,4 +1,5 @@
 using Microsoft.AspNetCore.Authorization;
+using Microsoft.AspNetCore.Mvc;
 using Microsoft.AspNetCore.Mvc.RazorPages;
 using QuantEngine.Core.Interfaces;
 using QuantEngine.Web.Services;
@@ -19,16 +20,31 @@ public class DetailModel : PageModel
         _logger = logger;
     }
 
-    public async Task OnGetAsync(string runId)
+    public async Task OnGetAsync([FromQuery] string? runId, [FromRoute] string? routeRunId)
     {
+        var targetRunId = runId ?? routeRunId;
+        if (string.IsNullOrEmpty(targetRunId))
+        {
+            if (RouteData.Values.TryGetValue("runId", out var routeVal))
+            {
+                targetRunId = routeVal?.ToString();
+            }
+        }
+
+        if (string.IsNullOrEmpty(targetRunId))
+        {
+            _logger.LogWarning("Detail page loaded without a runId");
+            return;
+        }
+
         try
         {
             var runs = await _collectionRepository.GetRecentRunsAsync(limit: 100);
-            Run = runs.FirstOrDefault(r => r.RunId == runId);
+            Run = runs.FirstOrDefault(r => r.RunId == targetRunId);
         }
         catch (Exception ex)
         {
-            _logger.LogError(ex, "Failed to load collection run detail");
+            _logger.LogError(ex, "Failed to load collection run detail for runId: {RunId}", targetRunId);
         }
     }
 }