Japanese AI App Promo Banner

Create a beautifully designed Japanese tech ad banner for a mobile app, in a 16:9 widescreen aspect ratio. The background features a futuristic blue-purple gradient, filled with glowing network lines, connecting nodes, soft lens flares, and delicate digital particles. At the top center is a modern app logo: a cyan hexagonal icon containing a large white “SC” and a small circuit symbol, followed by the brand text “SKILL Cert by AI” in a clean sans-serif font. “SKILL” is large and black, “Cert” is below it and also black, while “by AI” is smaller and cyan. At the center of the design is a striking Japanese headline in oversized white font with a dark blue outline and soft shadow.{argument name="headline text" default="AI-generated qualification certification application"} Next, add a second line of medium-sized white Japanese subtitle below, also with an outline and shadow:{argument name="subheadline text" default="Over 200 certifications for online battles"} Place a large, glossy, rounded rectangular call-to-action (CTA) button in the center of the foreground. It should be a bright cyan color with subtle gradients, bevels, and shadows, and contain striking white Japanese text.{argument name="button text" default="Instant free battles"} Three smartphone prototypes are showcased, arranged around the center: one at the bottom left, slightly tilted to the right, displays a leaderboard application interface with a line graph at the top, a small profile picture, a ranking list, and Japanese UI labels; a larger phone at the bottom right, slightly tilted to the left, displays a multiple-choice interface with Japanese question text, radio buttons, and a cyan button at the bottom; and a smaller phone at the far right edge, tilted inward, displays a dark dashboard-style interface with charts and Japanese text. Four floating UI graphic elements are added to the background: an analytical line graph panel at the top left, a holographic cube/dashboard cluster at the top right, a glowing wireframe brain or neural sphere behind a button at the bottom left, and a hexagonal chart/card element at the center right. A sleek AI, SaaS, and EdTech marketing aesthetic is employed, emphasizing high contrast, clean typography, hierarchy, neon effects, and advanced app promotion lighting.