机械键盘爆炸装配图

Design a crisp exploded-view product illustration of a custom mechanical keyboard named LUMEN K65, shown in three-quarter perspective on a pale gray background with subtle shadow. Separate the layers clearly: keycaps, switches, plate, PCB, foam, gasket mounts, case top, battery module, rotary knob, and case bottom. Use anodized silver, matte black, translucent smoke keycaps, and small teal accent parts. Add clean technical callouts and in-image text reading "LUMEN K65", "Exploded Assembly", "65% Layout", "Hot-Swap PCB", and "3,200 mAh". Include labels for "PBT Keycaps", "Linear Switch", "Aluminum Plate", "Poron Foam", "USB-C", and "Encoder Knob". Show a compact dimension note "317 mm x 112 mm x 31 mm". The composition should feel like an industrial design presentation board: precise spacing, realistic materials, sharp typography, correct labels, and highly legible component hierarchy.