Prompt vidéo épique de transformation de mécha en plan unique

A 20-second vertical (9:16) single-shot video, produced in one continuous take. 100% authentic live-action look, iPhone documentary style, handheld camera movement with a natural, breathing feel, realistic nighttime/backlit exposure, rolling shutter jelly effect, slight motion blur, and practical VFX - no game-like CG, no animated look, and no exaggerated superhero-style effects. Camera movements must be smooth and natural, with clear intent and logical consistency. The camera should always move naturally in response to the characters' actions and shifts in energy - no meaningless, erratic movements. [Overall Setting] A vast medieval fantasy landscape featuring an ancient forest of towering oak trees, mist-shrouded valleys, and a stone castle perched on a distant mountain peak. Amber sunlight filters through the foliage and thin mist, creating an epic aesthetic. The forest's edge meets a perilous cliff, with a deep ravine and a churning sea of fog below. The overall atmosphere is ancient, mysterious, majestic, and authentic. The wind rustling through leaves, dust, pebbles, and mist all adhere to real-world physics. The overall visual style is that of a documentary-style capture of a medieval fantasy world. [Character Identity Lock] @Image 1 serves as the sole reference for the live-action character; use it directly without resetting. Strictly maintain consistency with Image 1 regarding the character's identity, face, facial features, hairstyle, hair color, body proportions, and clothing appearance. She remains the same person throughout; her face and hair must retain the identifying features from Image 1 before and after transformation - do not replace them with unfamiliar facial features. [Mecha Identity Lock] @Image 2 serves as the sole reference for the mecha form; use it directly without resetting. Strictly maintain consistency with Image 2 regarding the mech's overall silhouette, head and neck structure, shoulder armor, chest armor, waist and hips, arms, leg armor, boots, mechanical structure on the back, metallic texture, and the silver-black-gray color scheme with orange energy details. After transformation, the body must transition into the mech form shown in Image 2, while retaining the character's face and hairstyle from Image 1, resulting in a final form of human face + full-body mech form from Image 2. [Single-Take Camera Movement Logic] The cinematographic logic of the entire sequence must be clear: in the opening segment, the camera follows the character closely as they flee; upon reaching the cliff's edge, the camera naturally moves around to the front as the character comes to an abrupt stop and turns; when the energy activates, the camera naturally pulls back and widens the shot as if pushed away by a shockwave; during the transformation climax, the camera performs a slow, semi-circular arc movement, using floating debris and energy streams as visual obstructions; after the transformation is complete, continue the momentum to pull back into an epic wide-angle shot; after the character flies off the cliff, the camera lags slightly behind for half a beat before catching up, creating the impact of a real single-take documentary. There are absolutely no hard cuts throughout the entire sequence; all natural transitions are achieved through movement, space, energy, and obstructions. [Timeline] 0–3s Opening: Wide shot of a forest clearing transitions into a close-up tracking shot. @Image 1 The character runs at full speed along the edge of an ancient forest, breathing heavily, clutching a small, glowing energy core. The camera is positioned slightly behind and to the side of her shoulder, as if a documentary filmmaker were desperately keeping up with her; the footage features authentic handheld movement, slight rolling shutter, and motion blur. The shot captures both her panting profile and the cliff's edge rapidly approaching ahead, along with the mist-shrouded valley and stone castle in the distance. She dashes to the cliff's edge and comes to an abrupt halt, sending loose rocks tumbling into the deep ravine below. Riding the momentum of her sudden turn, the camera smoothly circles from behind her to a low-angle shot directly in front of her, completing a natural transition from the chase to a face-off. 3–8s: She stands at the cliff's edge, her chest heaving violently, her gaze shifting from despair to resolve. She glances down at the energy core in her hand and either presses it forcefully against her chest or smashes it into the ground beneath her feet. Instead of a typical golden explosion, a ring of silver-black magnetic storm ripples instantly bursts outward from the ground and air, interspersed with golden-orange electrical arcs. The camera naturally slides back half a step and widens its shot as if pushed away by the shockwave - not a mechanical pull-back, but a genuine reaction to being forced back by the energy. Around her,碎石, metal dust, fallen leaves, and tiny debris float weightlessly, while her hair and the hem of her garment are pulled upward by the magnetic field. Orange mechanical patterns emerged on her arms, collarbone, spine, and lower abdomen, as if a dormant technological core within her body had been activated. The focus here is on depicting a technological awakening, not a painful transformation into a monster. 8–13s, Mid-Section B (Slow Motion 35%): The time slows to 35%. The camera begins a smooth, slow, semi-circular arc, gliding from slightly off-center in front of her to a two-thirds side view, maintaining continuous single-shot continuity throughout. The fragments of rock and metal particles floating around her are drawn by a magnetic field and begin to assemble at high speed along the curves of her body, forming the mecha structure shown in @Image 2. The transformation sequence must be clear and cool: first, the mechanical patterns on her collarbone, spine, and waist/abdomen light up; next, a dense internal skeleton forms on the outer sides of her arms; shoulder armor snaps into place from the air at high speed; chest and abdominal armor close precisely along the curves of her body; outer armor on her waist, hips, and thighs locks into place; her calves and boots upgrade into the mechanical legs shown in Figure 2; finally, the spinal armor unfolds section by section and lights up, completing the full back structure. She can raise her arms to shield her face, with the arm armor closing in front of the camera; by the time her hands drop, the main body of the mech is already mostly complete, using the character's movements and the armor's coverage to achieve a smoother visual transition. Throughout the entire process, the face, facial features, hair, and identity from Figure 1 remain unchanged; only the body gradually transitions into the mecha form shown in Figure 2. Energy streams emit orange pulsating light through the gaps in the armor, creating an extremely cool, steady, and sophisticated industrial aesthetic. 13–19s Mid-Section C (Return to Normal Speed): Time returns to normal. She has completed the full-body mecha transformation shown in Figure 2, but her face and hair remain as in Figure 1. The camera naturally pulls back to a wider, epic shot, framing her, the cliff, the canyon, the forest, and the stone castle in the distance. She first looks down at her mechanical hand, slowly clenching her fist as the orange energy bars light up one by one, confirming that she has mastered her power. This action should be brief yet intense, serving as the emotional pivot point where she transitions from fugitive to hunter. She then looks up and locks her gaze on the distant castle, leaning forward as brief flashes of energy light up the propulsion mechanisms in her back or legs, sending the gravel beneath her feet flying. She suddenly charges off the cliff. The camera lags slightly for half a beat as she leaps, then quickly catches up, creating the impact of a genuine single-take shot - as if the cinematographer had been left behind by her sudden burst of speed only to rush back to continue filming. 19–20s Conclusion: She streaks at high speed over the canyon in the mech form shown in Figure 2, with the golden sky and the stone castle coexisting in the distance. The camera pulls back slightly further, casting her as a sharp, cold silhouette against the vast landscape. It is not a roar at the sun, nor a declaration of freedom, but a silent, precise, and target-locked high-speed flight toward the stone castle. She streaks past the front of the lens, leaving a fleeting orange energy trail behind her, until all that remains is a tiny silhouette of the mech hurtling toward the castle - as if the hunt has only just begun. The entire sequence concludes with a grand, cold, and incredibly cool epic afterglow. [Audio] No background music, only SFX. Footsteps running through the forest, heavy breathing, the rustling of fabric against leaves, pebbles tumbling into a deep ravine, the low-frequency hum of the energy core, the electromagnetic pulse sound as the magnetic storm activates, the faint vibrations of floating debris, the metallic clank of armor locking into place at high speed, the crackle of electricity as mechanical circuits ignite, the precise servomotor sounds of the back armor deploying, the whoosh of the wind as she leaps off the cliff, and the energy wind howl during flight. In slow-motion sequences, all mechanical and energy sounds must be stretched out, lowered in pitch, and given a greater sense of spatial depth, making them more awe-inspiring and sophisticated. [Visual Requirements] Absolute realism, photo-realistic quality: authentic skin textures, authentic metal materials, authentic fabrics, authentic dust and wind. Avoid exaggerated distortions, cheap special effects, and cartoonish sci-fi aesthetics. The focus is on continuous live-action presence + mech body assembly (as shown in Figure 2) + single-take documentary-style immersion + epic fantasy setting.