「NIGHT GUARDIAN」は FontVibe AI で作成したスーパーヒーローの文字エフェクトです。クロームの縁を持つ斜体の赤と青の3D大文字。後ろには赤いマントがなびき、稲妻の絡む白い閃光から飛び出します。

Heroic authority lettering — letters as identity marks of power: bold, monumental, commanding. Strong single key light defines high-contrast form. Letters feel physically constructed — cast, forged, embossed, or built — not printed. Background: deep dark field (navy, charcoal, or black) maximizes letter contrast and gravitas. Hard cast shadows anchor letters as solid objects. Composition: letters fill frame as absolute subject. A custom-printed phone case held in one hand against a dark neutral background, natural ambient lighting from the side. The back panel of the case features "NIGHT GUARDIAN" as the printed design — chrome badge lettering on a deep midnight navy background, filling 70% of the back panel, centered. Matte finish case, the print slightly raised from the surface. The phone case and design are the sharp focal point. Product lifestyle photography — 9:16 vertical.