Add responsive margin adjustment for box-7 in o-nas.scss

- Updated the margin-bottom for .box-7 to 100px on small screens using the respond-below mixin.
- This change enhances the layout's responsiveness and improves visual consistency across different screen sizes.

layout/style-scss/o-nas.scss

@@ -794,6 +794,10 @@ p {
 .box-7 {
 	margin-bottom: 145px;
 
+	@include respond-below(sm) {
+		margin-bottom: 100px;
+	}
+
 	._row {
 		&-1 {
 			margin-bottom: 70px;