Breathtaking 2D cel anime teaser trailer, theatrical sakuga action, hand-painted mountain backgrounds. Opening: extreme wide of a terraced shrine village at dawn beneath a wall of black storm clouds, prayer flags snapping, a girl in shrine robes running up a thousand stone steps with a glowing folded crane cupped in her hands; low taiko rumble under temple bells and wind. Cut to: the summoning — she unfolds the crane and a thousand-year-old scroll erupts skyward, creasing itself into a towering origami titan, paper joints snapping crisp with every fold, valley mist rolling off its shoulders; a shakuhachi cry over massive drum hits and the groan of folding paper. Cut to: sakuga battle beat — the paper titan catches a black lightning strike in its cupped hands and folds the lightning itself into a white blossom, impact frames flashing, linework going loose and wild; full orchestral surge with choir, one perfect beat of silence at the catch. Final shot: the girl standing on the titan's shoulder above the clouds at sunrise, both silhouetted in gold as a single paper crane flies past the lens; the soaring melodic theme peaks, hard cut to black on a paper-fold snap. Vivid cel-painted palette with ink-wash storm grays and sunrise gold, subtle animation-cel grain, painterly volumetric god rays, ultra-detailed backgrounds, dynamic confident camera movement, trailer pacing, no text, no captions, no watermark.