keep the entire scene exactly as in the provided render do not modify yacht geometry hull color navy blue superstructure upper decks railings yakamoz signage lighting direction sky sea jet skis furniture submarine design submarine color shadows camera position framing color grading the stern platform is currently fully raised and flush with the lower teak deck modify only the integrated stern lift platform system identify the recessed rectangular teak section at the aft lower deck this is the mobile swim platform already integrated in the yacht design animate deploy this exact section downward as a hydraulic stern lift platform the platform must remain structurally connected to the yacht transom no floating deck no added external structure no redesign of the stern the platform must lower smoothly below sea level be partially submerged approx 40 60 cm underwater remain perfectly horizontal and parallel to the water surface maintain identical teak planks direction caulking lines and color reveal realistic marine mechanics underneath stainless steel hydraulic pistons telescopic marine grade arms structural hinge brackets integrated into the hull sides clean high end superyacht engineering detailing no exaggerated mechanical complexity water interaction water must wrap naturally around the submerged teak soft foam accumulation along platform perimeter slight turbulence where water meets the platform accurate refraction at submerged edges subtle wetness gradient on teak surface the personal submarine must remain centered on the platform stay aligned with the yacht longitudinal axis maintain exact same navy satin marine coating keep the transparent acrylic dome with realistic reflections and refraction sit naturally with correct contact shadows adjusted to new height the platform must clearly read as a luxury hydraulic beach club launch system integrated into the yacht photorealistic engineering accurate no reinterpretation strict structural realism only modify the stern lift platform deployment