「25」は FontVibe AI で作成した炎と煙の文字エフェクトです。燃え盛る炎と煙のエフェクト、劇的な熱波と燃え残りの輝きを表現します。

Real combustion physics: white-yellow inner core transitioning through orange and deep red to wispy blue-grey outer tips. Turbulent flame tongues surge upward with natural random motion. Dense dark smoke billows in heavy rolling columns, curling upward — charcoal and near-black with faint translucency at edges. Firelight self-illuminates from below with warm amber-orange cast. Dramatic upward rim from intense heat source underneath. Background: deep charcoal haze with faint ember glow — not pure black. Cinematic fire photography quality. LETTERFORM PRIORITY: when the chosen font carries its own treatment, that font's letterform shapes take priority and own the letters; this style governs the flame-and-smoke material, the combustion glow and the cast light. FALLBACK MATERIAL: if the font carries no material of its own, render the letters ablaze — a white-yellow core through orange to deep red flame tongues with dark rolling smoke and warm self-illumination from below. COLOR PRIORITY: keep the font's own colors if specified; otherwise the natural fire spectrum of amber, orange and deep red. A dark celebratory fire composition centered on the numerals “25”, isolated against deep charcoal-black haze rather than flat black. The number dominates nearly 70% of the square frame, with generous negative space around its glowing silhouette. Its surfaces are consumed by living combustion: white-yellow heat at the inner edges, molten amber and saturated orange across the bodies, deep crimson at the cooling outer contours. Tall, irregular flame tongues rise from the upper edges with believable turbulent variation, while dense near-black smoke rolls upward in layered curls, translucent at the thinning edges. A fierce orange underglow pools beneath the numerals and throws a dramatic upward rim across the smoke. Fine ember sparks lift through the air, some sharp and bright near the heat source, others fading into the background. Heat distortion ripples visibly above the figure, subtly warping the haze. Keep the atmosphere cinematic, intense, and triumphant—like a milestone number forged in a furnace. No extra words, props, borders, or decorative symbols.