2.5D 排行柱

<!-- motion-registry-context:{"format":"1.0.0","recipe_id":"chart.isometric-rank-bars","recipe_version":"0.2.0","recipe_source":"recipes/chart/isometric-rank-bars/recipe.yaml"} -->
# Motion Registry Context

<!-- motion-registry-section:recipe-identity:start -->
## Recipe identity
- Recipe ID: chart.isometric-rank-bars
- Schema version: 0.2.0
- Recipe source: recipes/chart/isometric-rank-bars/recipe.yaml
<!-- motion-registry-section:recipe-identity:end -->

<!-- motion-registry-section:motion-intent:start -->
## Motion intent and scope
- Purpose (zh): 多项数据按数值排序为带可见顶面与侧面的排行柱，并在最终聚焦冠军。
- Purpose (en): Multiple values sort into rank bars with visible top and side faces before the winner is focused.
- Scope: effect
- Complexity: advanced
- Subjects: chart
- Intents: compare, emphasize
- Use cases: data-story, knowledge-video, social-video, presentation
- Recipe capabilities: rank-sort, isometric-faces, rank-labels, winner-focus
<!-- motion-registry-section:motion-intent:end -->

<!-- motion-registry-section:inputs:start -->
## Inputs
- values: number-list (required; default=[82,64,91,53,74]) — Values to sort into descending rank order.
- labels: string (required; default=ATLAS|NOVA|EMBER|PULSE|VECTOR) — Pipe-delimited labels matching source values.
- headline: string (required; default=Weekly signal rank) — Ranking headline.
<!-- motion-registry-section:inputs:end -->

<!-- motion-registry-section:normalized-timeline:start -->
## Normalized motion timeline (0 to 1)
- 0.06–0.22 · stage.fade · opacity.fade → stage · parameters={"from":0,"to":1}
- 0.16–0.66 · bars.reveal · collection.reveal → bars · parameters={"order":"source","opacity_from":0,"opacity_to":1}
- 0.16–0.66 · bars.stagger · collection.stagger → bars · parameters={"order":"source","fraction":0.12}
- 0.64–0.84 · winner.settle · spring.settle → winner · parameters={"from":0.8,"to":1,"strength":"normal"}
- 0.86–1.00 · stage.hold · state.hold → stage · parameters={}
<!-- motion-registry-section:normalized-timeline:end -->

<!-- motion-registry-section:output-envelope:start -->
## Output envelope
- Aspect ratios: 16:9, 9:16, 1:1
- Duration: min 3s; preferred 3.8s; max 5s
<!-- motion-registry-section:output-envelope:end -->

<!-- motion-registry-section:acceptance:start -->
## Acceptance constraints
- sorted-ranks: Visible bars are sorted descending by value and carry rank labels.
- isometric-faces: Every bar has a visible top face and side face that stay geometrically attached while the bar grows.
- winner-focus: Only the highest ranked bar receives the final focus treatment.
- stable-hold: The ranking remains still and readable during the final hold.
<!-- motion-registry-section:acceptance:end -->

<!-- motion-registry-section:handoff-invariants:start -->
## Handoff invariants
- Preserve the subject, input meaning, event order, overlaps, final state, and approximate normalized timing.
- Keep the implementation deterministic and retain a readable, stable final hold.
- Treat the Recipe document as the source of truth; do not infer engine APIs in this shared core.
<!-- motion-registry-section:handoff-invariants:end -->