Thumbnail dây chuyền layer nữ tối giản

Create a complete vertical 9:16 promotional accessory thumbnail/poster, not a plain single image. Use [ảnh người mẫu] as the exact female model reference and [ảnh sản phẩm] as the exact layered necklace reference. Design a realistic Vietnamese jewelry poster showing the female model wearing the exact layered necklace close to the neckline. Include a main hero portrait, a necklace-detail close-up, a clasp-detail inset, simple style callouts, and 3 small supporting panels showing front view, neck close-up, and outfit matching. Add a bold Vietnamese headline and a short subheadline. Make it minimal, elegant, realistic, commercial, and easy to understand. No watermark.