时间旅人的悔恨格

一格戏剧性漫画，一位孤独科学家站在发光的时间机器舱内，望着一段他无法改变的全息记忆。精细科幻线稿，冷调青色与紫罗兰光辉，网点纸渐变，细微粒子效果在他周围旋绕。一个标题框写着「有些门一旦打开，便再也关不上。」神情沉郁，戏剧化逆光，情绪厚重的电影感科幻氛围。

A single dramatic comic panel of a lone scientist standing in a glowing time-machine chamber, watching a holographic memory of a moment he can't change. Detailed sci-fi lineart, cool cyan and violet glow, screentone gradients, subtle particle effects swirling around him. A caption box reads 'Some doors, once open, cannot be closed.' Somber expression, dramatic backlight, emotionally heavy cinematic sci-fi mood.