# 登录页左侧纯背景

使用 imagegen 技能、内置 image_gen 编辑生成。原图：03-login.png。输出：05-login-left-background.png。

仅保留深蓝品牌区的路径与触点；移除文字、Logo和右侧表单。为AI去字重建版本，不保证与原稿逐像素一致。未替换页面代码。

## 最终提示词

Use case: precise-object-edit. Input image 1 is the edit target: a login screen. Extract ONLY its LEFT deep-blue brand panel, which occupies x=0 to approximately 57% of input width, as a standalone clean background asset. Output portrait-ish aspect ratio approximately 10:11 matching that panel, full bleed. Remove the entire white right-hand login form panel. Remove ALL text, Chinese and English lettering, brand logo at upper left, short cyan underline below heading, slogans and footer text from the blue panel, reconstructing the underlying smooth navy gradient naturally. Preserve as closely as possible the original blue panel's actual artwork and composition: quiet dark navy upper half, brighter cobalt toward upper right, broad translucent blue/cyan flowing ribbons in the lower half, three distinct circular touchpoints (small filled pale cyan lower left, white ring center lower-middle, filled cyan upper-right of ribbon cluster). Preserve original ribbon shapes, positions, lighting, colors and clean dimensional flow; do not replace with different abstract art, do not add nodes or floor reflections. This is the background from THIS login concept, not a new alternative. No UI, no logo, no text, no watermark, no white border. High resolution, smooth gradients, opaque background suitable for left brand section of real login page.