“Mahdi” is a Cursive Signature text effect 使用 FontVibe AI 创作的文字效果. 亲笔签名：一笔流畅连成，首字母突出、后续小写相连，末尾一道长下划线花饰，蓝黑墨水写在白纸上.

Create a refined horizontal personal correspondence card, 16:9. A crisp warm-white cotton document card fills the frame, viewed perfectly flat from above, with a faint paper grain and generous blank margins. Set the exact primary text “Mahdi” large across the center, occupying 58% of the card width. Draw it as bespoke ultrathin continuous signature lettering: narrow, lightly right-slanted connected forms, near-monoline hairline strokes, a gently undulating baseline, a tall initial M with one extended entry stroke, restrained joins, and a long descending final flourish that sweeps beneath the name without obscuring legibility. Use flat deep blue-black fountain-pen ink only; natural ink pooling at tight turns, tiny dry pen-skips along the fastest hairlines, no foil, no gloss, no metallic effect. Below, in tiny widely tracked small caps, set the exact text “PRIVATE CORRESPONDENCE”, centered and sharply legible in the same blue-black ink. Place a slim black fountain pen diagonally near the lower-right edge, softly out of focus and cropped by the frame; it must not overlap the typography. Even soft daylight from above, nearly shadowless document lighting, high-resolution editorial product photograph. Keep the card uncluttered: no seals, no extra marks, no illegible text, no watermark.