苍白女术士首尾帧：符文点亮与镜头后拉

First-to-last frame demo with a fantasy character. Frame 1: a tight close-up of a pale sorceress with platinum braided hair, downcast gaze, lit by cold rim light against a stone wall etched with ancient runes. Frame 2: same character pulled back to a three-quarter portrait, gaze now meeting camera, runes glowing faintly. Seedance interpolates the 8s transition: subtle camera dolly back, gradual rune ignition, breath visible in cold air. Dark fantasy color palette — slate, ash, faint cyan emissive accents.