- Merge the detail area's bottom border into the last record's thick line; remove the redundant thick line above the total (keep vertical spacing, total position unchanged)
- Add a thick line below the "Packing List" title matching the detail header's thickness, forming a "thick-above-thin-below" double line
- Change the detail list inner separators to dashed lines (simulated with multiple short solid segments, as ReportBro lines do not support native dashes); line weight raised from hairline to 1pt
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