「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 city rooftop — wet dark concrete floor, city skyline in the deep background, rain mist in the air catching distant neon reflections. The center of the frame features a large chrome badge sign affixed to a brutalist concrete parapet wall: "NIGHT GUARDIAN" in massive ultra-condensed chrome badge lettering, filling 76% of frame width, vertically centered in the frame. Cold overhead floodlight from above, electric-blue trim light from below. Storm clouds above the skyline, warm amber city glow beneath. The hero identity mark on the city rooftop — 9:16 vertical cinematic atmosphere.