diff --git a/Views/Grading/DiamondSelect.xaml b/Views/Grading/DiamondSelect.xaml
index 8cad8df..288a9a0 100644
--- a/Views/Grading/DiamondSelect.xaml
+++ b/Views/Grading/DiamondSelect.xaml
@@ -7,11 +7,13 @@
       xmlns:hc="https://handyorg.github.io/handycontrol"
       d:DesignWidth="1000"
       d:DesignHeight="600"
+     
       mc:Ignorable="d">
     <Border.Resources>
         <BooleanToVisibilityConverter x:Key="BoolToVisibilityConverter"/>
     </Border.Resources>
-    <Grid>
+    <Border  CornerRadius="15" Padding="15" Background="#F7F7F7">
+        <Grid>
         <Grid.ColumnDefinitions>
             <ColumnDefinition MinWidth="350" Width="1*" />
             <ColumnDefinition Width="Auto" />
@@ -100,4 +102,7 @@
             </ItemsControl>
         </Border>
     </Grid>
+        
+    </Border>
+    
 </Border>
diff --git a/Views/UserControl/ViewportData/Helper/ViewportHelperPro.cs b/Views/UserControl/ViewportData/Helper/ViewportHelperPro.cs
index 2974f03..8541947 100644
--- a/Views/UserControl/ViewportData/Helper/ViewportHelperPro.cs
+++ b/Views/UserControl/ViewportData/Helper/ViewportHelperPro.cs
@@ -346,6 +346,7 @@ public class ViewportHelperPro
         List<Vector3> selFaceVector = new List<Vector3>();
         if (waistList.Count > 0)
         {
+            //顶线和底线
             foreach (var entity in waistList)
             {
                 selFaceVector.Add(entity.Point1);
@@ -367,8 +368,20 @@ public class ViewportHelperPro
             }
             result.Add(DisplayLineModel3D( VectorClockwiseSort(ViewportManager.GirdleBottomLines),   color??ViewportManager.LineColor, thickness));
             result.Add(DisplayLineModel3D( VectorClockwiseSort(ViewportManager.GirdleTopLines),  color??ViewportManager.LineColor, thickness));
+            //找到所有平行于Y轴的线
+            for (int i = 0; i < uniqueVectors.ToList().Count - 1; i++)
+            {
+                var nowItem = uniqueVectors.ToList()[i];
+                var nextItem = uniqueVectors.ToList()[i + 1];
+                var line = new Tuple<Vector3, Vector3>(nowItem, nextItem);
+                if (IsLineSegmentParallelToYAxis(line))
+                {
+                    result.Add(DisplayLineModel3D(new List<Vector3>(){nowItem,nextItem }, color??ViewportManager.LineColor, thickness));
+                }
 
+            }
         }
+        
         return result;
     }
     
@@ -1009,6 +1022,17 @@ public class ViewportHelperPro
         var v = p2 - p0;
         return Vector3.Cross(u, v);
     }
+    private  static bool IsLineSegmentParallelToYAxis(Tuple<Vector3, Vector3> lineSegment,float epsilon = 1e-6f)
+    {
+        Vector3 nowItem = lineSegment.Item1;
+        Vector3 nextItem = lineSegment.Item2;
+        
+        if (Math.Abs(nowItem.X - nextItem.X) < epsilon && Math.Abs(nowItem.Z - nextItem.Z) < epsilon)
+        {
+            return true; // 平行于 Y 轴
+        }
+        return false; // 不平行于 Y 轴
+    }
     #endregion
 
 }
\ No newline at end of file