「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. "NIGHT GUARDIAN" applied as a phone lock screen wallpaper. Realistic iPhone in a hand or propped on a surface — screen-on, showing the lock screen. The wallpaper fills the full screen: massive chrome badge lettering "NIGHT GUARDIAN" centered on a deep midnight navy background, cold blue ambient lighting. Lock screen time display "22:47" at the top in white, notification bar barely visible. The phone is in natural portrait position. The wallpaper and chrome lettering are the focal point. Lifestyle photography, soft ambient lighting — 9:16 vertical.