High CTR Japanese Video Platform Webinar Thumbnail

High-quality Japanese webinar thumbnail for video platforms, 16:9 widescreen proportions. Topic: "AI仕事術 60分無料セミナー". Dense but neatly organized Japanese typography with strict clear visual hierarchy: extra-large headline "AI仕事術を今日から実践" in bright high-contrast accent colors, smaller supporting text "資料作成・要約・企画を時短", legible bullet callouts aligned to one side: "初心者OK", "実例つき", "無料テンプレ配布". Include subtle trust-building badges "2026最新版" and "参加無料". Background uses a soft muted clean gradient with minimal geometric pattern. Include a crisp laptop webinar interface mockup and a professional friendly presenter half-body figure. Polished commercial, trustworthy, conversion-optimized, sharp, no blurry or illegible text, perfectly aligned clean layout, no real platform logo, no watermark.