Mockup photo réaliste de stylo écologique jaune moutarde

Photo-real product mockup of a mustard yellow pen with "stylo écologique" logo printed at left chest small. Mockup style: desk lifestyle scene, warm earth logo palette. Studio-grade photography, sharp focus, natural fabric texture / mug ceramic / paper grain. Magazine-quality merch shot, no watermarks. Logo is generic placeholder typography — no real-brand marks. Realistic product proportions. Target search intent (rendered visually, no on-image text): "stylo écologique" (fr).