“Sarah Lin”是使用 FontVibe AI 创作的签名手写体文字效果。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 square, polished signature mark for a consulting brand, rendered as a real hand-signed autograph on crisp white uncoated document stock. The only text is “Sarah Lin”. Set it as one legible, continuous-feeling signature: an oversized capital S opens with a sweeping entry stroke; the remaining letters connect in quick, energetic strokes with a clear forward slant, firm downstrokes, lighter joins, and a decisive monoline confidence. Finish with a bold underline swash that sweeps beneath the name. Use a single deep blue-black matte pen-ink color, with subtle natural ink pooling at turns and faint skips where the nib lifts; no gloss, metallic finish, dimensional lettering, or decorative calligraphy. Center the mark horizontally and vertically, occupying about 58% of the canvas width, with generous clean negative space on all sides. Soft, even daylight, restrained paper grain, and a plain white signing surface. A slim dark fountain pen may sit softly out of focus near one edge, not touching or competing with the mark. No additional lettering, tagline, border, seal, or graphic ornament.