AI 工具发布主视觉

一张 1600×640 px 的 AI 写作工具发布主视觉横幅。背景：深炭黑色，带细六边形网格纹理。中左：由青色与紫色神经网络丝线构成的发光球体。右侧白色无衬线大标题 「立即选购」，下方浅灰副标题一行，再下方青色胶囊形 CTA 按钮，文字 「立即选购」。细霓虹青色线条从球体延伸如电路走线。球体充当唯一光源，在深色背景上形成冷调反射。整体气质：未来感、活力感、精准。

A full-bleed hero banner (1600×640 px) announcing an AI writing tool launch. Background: deep charcoal black with faint hexagonal mesh pattern. Center: a glowing orb composed of swirling cyan and violet neural-network filaments, slightly off-center to the left. Right side: large white sans-serif headline "Write Smarter. Ship Faster." below which a one-line subtext in pale gray reads "Powered by next-gen language models." Below that, a vivid cyan pill-shaped button with text "Try Free 14 Days". Thin neon cyan accent lines radiate from the orb like circuit traces. Lighting: the orb acts as the only light source, casting cool reflections on the dark background. Mood: futuristic, energetic, precise.