{
  "meta": {
    "project": "良渚文化耳环背贴卡 · 渚神护佑 · 三色版",
    "title_text": "渚神护佑",
    "title_text_note": "首字为「渚」（三点水），非「诸」",
    "orientation": "portrait",
    "dpi": 300,
    "units": "坐标原点为成品框左上角；mm 为设计基准，px 为 300dpi 换算值（1mm = 11.811px）",
    "date": "2026-06-11"
  },
  "canvas": {
    "trim_mm": { "width": 75, "height": 98 },
    "trim_px": { "width": 886, "height": 1157 },
    "bleed_mm": 3,
    "with_bleed_mm": { "width": 81, "height": 104 },
    "with_bleed_px": { "width": 957, "height": 1228 },
    "safe_margin_from_trim_mm": 4,
    "safe_margin_from_trim_px": 47,
    "corner_radius_mm": { "value": 3, "optional": true }
  },
  "zones": {
    "title": {
      "rect_mm": { "x": 8, "y": 9, "width": 59, "height": 12 },
      "rect_px": { "x": 94, "y": 106, "width": 697, "height": 142 },
      "align": "center",
      "char_height_mm": 9,
      "letter_spacing": "0.12em–0.18em",
      "seal_block_mm": { "size": 3.5, "position": "标题末字「佑」右下", "optional": true }
    },
    "ring_band": {
      "shape": "ellipse_band",
      "center_mm": { "x": 37.5, "y": 56 },
      "center_px": { "x": 443, "y": 661 },
      "outer_radius_mm": { "rx": 32, "ry": 36 },
      "outer_radius_px": { "rx": 378, "ry": 425 },
      "inner_radius_mm": { "rx": 22, "ry": 26 },
      "inner_radius_px": { "rx": 260, "ry": 307 },
      "band_width_mm": 10,
      "stations": 8,
      "station_angles_deg": [270, 315, 0, 45, 90, 135, 180, 225],
      "station_angle_note": "0°=3点方向，顺时针；270°=12点方向为神人兽面主纹位",
      "interlace_rule": "奇数站母题压弦纹之上，偶数站穿弦纹之下；每站附加±6°~10°偏转",
      "motif_coverage": "55%–65%"
    },
    "center_safe_zone": {
      "rect_mm": { "x": 17.5, "y": 38, "width": 40, "height": 36 },
      "rect_px": { "x": 207, "y": 449, "width": 472, "height": 425 },
      "rule": "仅底色；零纹样、零文字、零阴刻线"
    },
    "earring_holes": {
      "diameter_mm": 1.5,
      "diameter_px": 18,
      "spacing_mm": 20,
      "centers_mm": [
        { "x": 27.5, "y": 50 },
        { "x": 47.5, "y": 50 }
      ],
      "centers_px": [
        { "x": 325, "y": 591 },
        { "x": 561, "y": 591 }
      ],
      "note": "针式耳环用 Ø1.5mm 圆孔；钩式/夹式改同位置 2×4mm 短缝，下单前与饰品实物核对"
    },
    "footer": {
      "rect_mm": { "x": 8, "y": 88, "width": 59, "height": 6 },
      "rect_px": { "x": 94, "y": 1039, "width": 697, "height": 71 },
      "align": "center",
      "char_height_mm": 2.4,
      "text": "",
      "note": "品牌名/系列名占位，内容待定"
    }
  },
  "strokes": {
    "primary_outline_mm": 0.5,
    "secondary_line_mm": 0.35,
    "engraved_fill_line_mm": 0.25,
    "engraved_fill_line_on_dark_bg_mm": 0.3
  },
  "typography": {
    "title_font": "思源宋体 Heavy（免费商用）；可选 方正清刻本悦宋（需商用授权）",
    "footer_font": "思源宋体 Regular"
  },
  "palette": {
    "鸡骨白": "#F7F6F2",
    "琮黄": "#DDCCAC",
    "玉沁黄": "#BD8537",
    "璧青": "#58695D",
    "炭稻黑": "#302F2E",
    "泥陶粉": "#D8CBC0",
    "雾灰": "#A19D90",
    "抱玉朱": "#A94033"
  },
  "variants": [
    {
      "id": "A",
      "name": "抱玉朱 · 主推版",
      "background": "#A94033",
      "line_and_title": "#F7F6F2",
      "accent": "#DDCCAC",
      "accent_usage": "重圈眼瞳、印章块、玉璜填色",
      "min_reversed_line_mm": 0.3
    },
    {
      "id": "B",
      "name": "璧青版",
      "background": "#58695D",
      "line_and_title": "#F7F6F2",
      "accent": "#BD8537",
      "accent_usage": "眼瞳、印章块、鸟羽点缀；用量≤5%",
      "min_reversed_line_mm": 0.3
    },
    {
      "id": "C",
      "name": "鸡骨白版",
      "background": "#F7F6F2",
      "line_and_title": "#302F2E",
      "accent": "#A94033",
      "accent_usage": "印章块、重圈眼瞳",
      "optional_texture": { "color": "#A19D90", "opacity_max": 0.08, "scope": "仅环带底" },
      "min_line_mm": 0.25
    }
  ],
  "cmyk_reference": {
    "note": "参考值，以打样为准",
    "#A94033": [25, 85, 80, 15],
    "#F7F6F2": [3, 3, 5, 0],
    "#DDCCAC": [15, 18, 35, 0],
    "#BD8537": [25, 55, 90, 10],
    "#58695D": [70, 45, 60, 25],
    "#302F2E": [70, 65, 65, 75],
    "#A19D90": [40, 33, 40, 5]
  }
}