“f”是使用 FontVibe AI 创作的浮雕压印文字效果。衬线大写字母盲压在象牙白棉纸上：不着墨，只有凸起的浮雕，低角度斜光勾出清晰的高光脊与柔和阴影。

Fine paper fibers visible around letter edges where the relief meets the flat surface. Raking light from upper-left at a low angle reveals the raised topology: crisp highlight ridge along the top edge of each letter, soft shadow on the opposite side. No color added — tonal contrast is the only visual language. No gradients on letter faces, no glow, no outline strokes. A premium dark brown leather notebook cover, close-up. 'f' embossed in Trajan serif at center — pressed into the leather surface, edges sharp, leather grain visible around the letter. Warm directional light from upper-left. The embossed logo and leather texture are the entire composition. Square 1:1.