Cloisonne History PPT Slide

{"type":"single-slide educational PPT page in ornate Chinese cultural style","canvas":{"aspect_ratio":"16:9 widescreen","background":"warm ivory parchment with faint ink-wash mountains, clouds, and pale blue-gray landscape texture","border":"thick dark teal frame with gold double-line trim and decorative Chinese corner knots"},"theme":{"topic":"{argument name=\"slide title\" default=\"历史沿革：起源与发展\"}","subtitle":"{argument name=\"subtitle text\" default=\"这门工艺并非凭空而来，而是在交流中生长、在中国语境中成熟。\"}","style":"elegant museum-course presentation, classical Chinese ornamentation, blue-and-gold cloisonne enamel palette, refined academic tone"},"layout":{"page_number":{"position":"top right inside ornate teal-and-gold label","text":"04 / 10"},"title_block":{"position":"top center","title_font":"large bold dark navy Chinese serif calligraphy-style type","subtitle_font":"smaller brown Chinese serif text","decorations":"small teal-and-gold cloud ornaments flanking subtitle"},"timeline":{"position":"middle across full width","count":5,"cards":[{"number":"01","position":"left","text":"珐琅工艺最早可追溯至西方与中亚地区，后经丝绸之路传入中国。","stage_label":"西来影响"},{"number":"02","position":"left-center","text":"元代已出现相关技术基础与器物形态，为后续发展奠定条件。","stage_label":"元代基础"},{"number":"03","position":"center","text":"明代工艺逐渐成熟，北京成为重要制作中心。","stage_label":"明代成熟"},{"number":"04","position":"right-center","text":"“景泰蓝”之名，常被认为与明景泰年间盛行的蓝釉色有关。","stage_label":"清代鼎盛"},{"number":"05","position":"right","text":"到清代，掐丝珐琅进入更加精致繁复的发展阶段。","stage_label":""}],"card_style":"rounded cream plaques with thin gold outlines, teal numbered floral medallions above, small black bullet at start of each text block","connector":"thin horizontal gold line with small circular nodes and gold arrows between teal stage labels"},"bottom_illustration":{"position":"lower third","map":"sepia silk-road map sweeping left to right across mountains, with dotted caravan route, camels, pagodas, city gates, and small vertical place tags","place_tags_count":5,"place_tags":["西方","中亚","敦煌","西安","北京"],"foreground_left":"white magnolia flowers and pale ink clouds","foreground_right":"three ornate blue cloisonne enamel objects on a dark teal tabletop: a flat floral plate, a tall vase, and a large lidded incense burner with gold handles and feet, plus one small round lidded box and several gold rings","object_count":5},"visual_requirements":"Create a polished finished PPT slide, not a mockup. Use crisp readable Chinese typography, balanced spacing, antique watercolor textures, and highly detailed blue-and-gold enamel product illustration. Keep all five timeline cards distinct and aligned, with the fifth card having no bottom stage label. Maintain a premium courseware aesthetic suitable for a classroom lecture on the historical development of cloisonne enamel."}