fix(grading-card): double horizontal gap between adjacent mark boxes

resources/views/pdf/partials/common-styles.blade.php

@@ -417,7 +417,7 @@
     .scan-sheet-marks {
         display: flex;
         align-items: center;
-        gap: 4px;
+        gap: 16px;
         justify-content: flex-start;
         white-space: nowrap;
     }

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

@@ -54,7 +54,7 @@
 .scan-sheet-marks {
     display: inline-flex;
     align-items: center;
-    gap: 8px;
+    gap: 16px;
 }
 
 .scan-sheet-page .scan-grade-box {
@@ -65,7 +65,7 @@
     height: 21px;
     display: inline-block;
     vertical-align: middle;
-    margin-right: 8px;
+    margin-right: 16px;
 }
 
 .scan-sheet-page .scan-grade-box:last-child {

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

@@ -64,7 +64,7 @@
                     <span class="scan-sheet-no" style="font-weight:700;font-size:14px;line-height:1.2;white-space:nowrap;margin-right:2px;">题目 {{ $questionNo }}.</span>
                     <span class="scan-sheet-marks" style="display:inline-flex;align-items:center;gap:0;">
                         @for($i = 0; $i < $boxCount; $i++)
-                            <span class="scan-grade-box" style="display:inline-block;width:21px;height:21px;border:1px solid #333;box-sizing:border-box;background:#fff;vertical-align:middle;margin-right:8px;"></span>
+                            <span class="scan-grade-box" style="display:inline-block;width:21px;height:21px;border:1px solid #333;box-sizing:border-box;background:#fff;vertical-align:middle;margin-right:16px;"></span>
                         @endfor
                     </span>
                 </div>
@@ -81,7 +81,7 @@
                     <span class="scan-sheet-no" style="font-weight:700;font-size:14px;line-height:1.2;white-space:nowrap;margin-right:2px;">题目 {{ $questionNo }}.</span>
                     <span class="scan-sheet-marks" style="display:inline-flex;align-items:center;gap:0;">
                         @for($i = 0; $i < $boxCount; $i++)
-                            <span class="scan-grade-box" style="display:inline-block;width:21px;height:21px;border:1px solid #333;box-sizing:border-box;background:#fff;vertical-align:middle;margin-right:8px;"></span>
+                            <span class="scan-grade-box" style="display:inline-block;width:21px;height:21px;border:1px solid #333;box-sizing:border-box;background:#fff;vertical-align:middle;margin-right:16px;"></span>
                         @endfor
                     </span>
                 </div>