浅色模式长篇知识推文串

生成一张 1024x1280 像素、4:5 竖版无品牌中文社区浅色长文串帖截图。账号「@scienceinplain 科普」，用户名「@scienceinplain」。主题为肠道菌群和情绪，第一条正文：「你的肠道菌群会影响情绪，这里用简单语言讲清楚。」连续卡片标注「1/12」「2/12」「3/12」，内容用中文解释肠神经、迷走神经、发酵食物和睡眠。底部操作「回复」「转发」「喜欢」「收藏」。白底细分割线。禁止真实平台名称、英文大段正文、英文互动指标、水印或乱码。

A photorealistic light-mode Twitter/X thread screenshot showing tweets 1 through 5 of a long educational thread, visible from a phone viewport. Account: "@scienceinplain" (blue checkmark, avatar: DNA helix icon in teal). Tweet 1: "How your gut bacteria influence your mood — a thread 🧵 (1/12)". Tweet 2: "Your gut has ~100 million neurons. Scientists call it the second brain. (2/12)". Tweet 3: "The vagus nerve is the direct phone line between gut and brain. It carries 80% of its signals upward. (3/12)". Tweet 4: "Certain gut microbes produce serotonin precursors. Low microbiome diversity = lower baseline mood. (4/12)". Tweet 5: "Here's what changes gut diversity fastest: 🥦 Fibre 🍵 Fermented foods ⏰ Sleep consistency (5/12)". Thread connector lines in light teal run vertically between cards. White background, clean layout, high readability.