时长与镜头：15 秒四段 + 切黑：发现 → 心跳 → 苏醒 → 悬念。原作的结构是"同一个刺激（心跳）重复四次、每次升级一点"，这是悬疑片最经典的节奏：第一次让人怀疑、第二次确认、第三次升级、第四次爆发。

写法要点：①用拟声词"咚"标出节拍，模型会把声音和画面变化对齐；②结尾的约束句很关键——"全程保持化石状态、不长血肉、没有魔法光效"，否则模型很容易把化石"复活"成一条完整的龙，悬念就没了；③固定"两名探险者 + 一具骨架"的数量。

怎么填变量：[地下洞穴] 换成"沙漠考古现场""深海沉船舱""博物馆闭馆后的大厅"；巨龙可以换成"远古巨鲸""巨人石像""沉睡的机甲"。

常见失败与调整：

• 龙直接复活飞起来：保留结尾约束，并把"前爪合拢"作为最大的动作。
• 洞穴太暗什么也看不清：写"两盏头灯的光束和洞顶裂缝透下的微光"。
• 探险者数量变化：每段都写"两名探险者"。

改编自 @DeCat2025 发布、YouMind-OpenLab/awesome-seedance-2-prompts 收录的提示词，许可证 CC BY 4.0。

英文原版

15-second photorealistic live-action dark fantasy. Two explorers inside a vast underground cavern discover the enormous fossilized skeleton of an ancient dragon embedded in rock. The complete skull and massive rib cage are clearly visible. Realistic geology, headlamps, dust, scale and human movement.  

0–4s - DISCOVERY: Wide shot. The explorers walk beneath gigantic fossilized ribs towering over them. One places his gloved hand against a rib for scale.  THUMP.  A deep heartbeat reverberates through the entire skeleton.  Both explorers freeze.  

0–8s  IT BEATS AGAIN: Close shot on the hand touching the fossil.  THUMP.  Stronger.  Dust jumps from every bone simultaneously. The explorer immediately pulls his hand away.  THUMP.  The dragon’s huge rib cage visibly expands a few centimeters as if taking its first breath in centuries, then settles.  The explorers slowly back away.  

8–12s - WAKING: Camera tracks toward the enormous fossilized skull.  Another violent heartbeat.  Small rocks fall from the skull. Its lower jaw slowly opens with a deep grinding sound.  Inside the empty eye socket, something moves deep in the darkness.  

12–15s - CLIFF-HANGER: Wide shot with the tiny explorers beneath the skeleton.  THUMP.  The entire cavern shakes.  The dragon’s enormous fossilized front claw suddenly CLOSES against the stone floor.  The explorers stare upward.  A massive inhale echoes through the cavern.  

CUT TO BLACK.  Sound: cavern ambience, increasingly powerful heartbeats resonating through bone, falling grit, grinding fossilized joints, final enormous breath.  Photorealistic and physically grounded. The dragon remains a fossilized skeleton throughout - no flesh regeneration, transformation, magical glow or fire. Keep exactly two explorers and one consistent skeleton. Real bone weight, dust and rock interaction. No extra limbs, changing anatomy, glowing eyes, fantasy particles or CGI look.