電商包裹感謝卡（水彩植物風）

prompt

Design a thank-you card for {brand_name}, an online shop selling {product_type}. Horizontal A6 postcard format (148x105mm, landscape). Style: hand-painted watercolor botanicals — loose eucalyptus and wildflower sprigs in {palette} tones framing the corners only, lots of white space. Top center: 'Thank You' in a warm handwritten script, with the brand name in small letterspaced caps beneath. Keep the entire middle band clean and empty so a personal handwritten note can be added, and reserve the bottom edge for a discount line about {next_order_offer}. Soft paper grain texture, no harsh shadows, gentle and giftable mood.