VISUAL OS 016 — 从地面仰拍的城市频率

```json
{
  "style_name": "Ground Up",
  "style_slug": "cobalt-sky-blend-chunky-orange",
  "canvas": "4:5 portrait, flat cobalt field #0B4FD0 that blends seamlessly into the photographed sky",
  "color": {
    "field": "cobalt / ultramarine #0B4FD0",
    "display": "warm orange #F2652A",
    "shapes": "leaf green #52B04E",
    "text": "cream #F7F0DC",
    "rule": "four colors, no fifth — and the flat blue must match the photographed sky exactly so the horizon between graphic and sky is invisible"
  },
  "typography": {
    "headline": "two-word imperative, ALL CAPS, chunky rounded display with soft wobbly terminals and slightly irregular baselines — hand-cut feel, not a clean geometric; orange, top of frame, 1–2 lines, letters nearly touching",
    "occlusion": "the subject or their prop overlaps the headline from below, breaking one or two letters",
    "caption": "2–3 short lines of small cream lowercase sans, left side at mid-height, sentence fragments separated by a slash",
    "marks": "small blue or light-blue tick dashes scattered around the headline like registration marks",
    "glyph": "one hand-drawn mark near the caption — double chevron / diagonal arrow / curved arrow / four-point sparkle / crescent moon"
  },
  "graphic_shapes": "soft organic green blobs and ribbon squiggles bleeding in from the left and right edges, always cropped by the frame, never floating in the middle",
  "photography": {
    "angle": "camera low to the ground, tilted up — the subject towers and the horizon sits in the bottom quarter",
    "light": "direct midday sun, hard shadows, high saturation, clear blue sky",
    "subject": "one person mid-motion — walking, reaching, lifting, leaning in — looking up or off-camera, relaxed and pleased, never posing at the lens",
    "wardrobe": "styled ONLY from the four-color palette; the outfit is part of the color system",
    "casting": "vary the age hard across the set — teens through seventies",
    "prop": "one real object that names the activity: flowers, a record, a vase, a telescope"
  },
  "design_rules": [
    "the seam between flat blue and real sky must be undetectable — this is the whole trick",
    "green shapes only ever touch the edges",
    "headline is an instruction, two words, present tense",
    "no drop shadows on the type; it sits flat on the blue like screen print"
  ],
  "swap_variables": {
    "subject": "flower buyer / rooftop DJ / potter / young astronomer",
    "headline": "FRESH RUN / SPIN ON / SHAPE IT / LOOK UP",
    "caption": "flowers after sunrise / sound travels · city frequency / hands make the future / small worlds · wide skies",
    "glyph": "chevrons / arrow / sparkle / moon",
    "prop": "wildflower bouquet / vinyl + suitcase turntable / raw vase / refractor telescope"
  }
}
```