iOS AI 对话深色极简界面

生成一张 1024x1280 像素、4:5 竖版极简暗色 AI 聊天手机界面。顶部标题「示例应用」，聊天内容为中文：用户「用一句话解释量子纠缠。」助手「两个粒子会形成关联，测量其中一个会立刻影响整体描述。」用户「再写成一首俳句。」底部输入框占位「输入消息…」，发送按钮为简单箭头。所有可见文字为简体中文；AI 可保留；不出现英文对话、英文输入框、真实聊天平台标志、水印或乱码。

A focused iOS AI chat interface displayed on an iPhone 15 Pro in a top-down flat lay on a brushed dark concrete surface. The screen background is near-black (#111111). The chat conversation shows four message bubbles: two from the user (right-aligned, deep indigo bubble #3D3A8F, white text) and two from the AI assistant (left-aligned, very dark gray #232323, soft white text). User message: "Explain quantum entanglement in one sentence." AI response: a single paragraph beginning "Two particles become correlated such that measuring one instantly…" in 16px SF Pro Text — the text is precise and tightly set. A second user message: "Give me a haiku about it." AI response: three centered lines of verse in italic. Below the latest AI bubble, a subtle animated typing indicator — three pulsing white dots in a dark pill. Input bar at the bottom: a dark rounded rect text field reading "Message…" in placeholder gray, a plus-circle icon to the left for attachments, and a blue gradient "Send" arrow button to the right. The UI has no sidebar, no clutter — pure conversation focus. Status bar white. Top header: "Nova" as the assistant name in 17px centered SF Pro Semibold, chevron back on the left, options dots on the right.