Учебный слайд по истории перегородчатой эмали

{
  "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": "[历史沿革：起源与发展]",
    "subtitle": "[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."
  }
}