5863ステップの使い方 — 選んで、入力して、コピーする15秒の縦型モーション

Make a dynamic 15-second vertical motion graphics explainer showing how "【名前】" works in three steps: 【3つのステップ】. Each step transforms into the next. Go all out and make the music in code.
Rules: 1080x1920 vertical, 60 fps, exactly 15 seconds, MP4 with sound. Text big enough to read on a phone. No corner labels, timecodes or captions, only the motion. Keep moving to the end with no frozen frames. For Korean text use a Korean font such as @fontsource/black-han-sans. Do it all now without asking.

[Final output format]
出力サイズは1080×1920ピクセル、9:16の縦型にしてください。文字は中央の安全な範囲に収めてください。
This selected output format takes priority over any fixed canvas size or aspect ratio elsewhere in this template. Adapt the composition, text zones and margins to the selected canvas without stretching or cropping essential content. Device safe areas apply only when a device is selected. Never print these format instructions on the image.