手绘简约风秋日快递纸箱落叶堆叠插画素材

minimalist watercolor style illustration, four cardboard boxes of different sizes stacked in the lower right corner, the largest one open at the top, others closed, with simple lines and markings on the surface. Maple leaves scattered around the boxes in orange-red, golden-yellow, and light-pink, some floating in the air, some on the ground or boxes, creating a dynamic sense of autumn wind and falling leaves. Background in off-white with subtle shadows under the boxes for depth. Warm and soft color palette featuring autumn leaf tones like orange-yellow, brown-red, and light-brown. Delicate watercolor brushstrokes, natural light transitions, conveying a quiet, nostalgic, and cozy autumn atmosphere.