style(pdf): adjust judge-card row spacing only

resources/views/pdf/partials/grading-scan-sheet-styles.blade.php

@@ -34,7 +34,7 @@
 
 .scan-sheet-col {
     display: grid;
-    row-gap: 8px;
+    row-gap: 12px;
 }
 
 .scan-sheet-item {

resources/views/pdf/partials/grading-scan-sheet.blade.php

@@ -54,7 +54,7 @@
     <div class="scan-sheet-hint" style="font-size:14px;color:#444;margin-bottom:14px;line-height:1.5;">提示：请根据答案和解析进行批改，在回答正确的 □ 内划 / ，在回答错误的 □ 内打 X 或置空</div>
 
     <div class="scan-sheet-two-cols" style="display:flex;align-items:flex-start;gap:18px;">
-        <div class="scan-sheet-col" style="flex:1 1 0;display:grid;row-gap:8px;">
+        <div class="scan-sheet-col" style="flex:1 1 0;display:grid;row-gap:12px;">
             @foreach($leftItems as $item)
                 @php
                     $questionNo = (int) ($item['no'] ?? 0);
@@ -71,7 +71,7 @@
             @endforeach
         </div>
 
-        <div class="scan-sheet-col" style="flex:1 1 0;display:grid;row-gap:8px;">
+        <div class="scan-sheet-col" style="flex:1 1 0;display:grid;row-gap:12px;">
             @foreach($rightItems as $item)
                 @php
                     $questionNo = (int) ($item['no'] ?? 0);