---
version: "ppt-style-v1"
name: "Vellum"
description: "Vellum is a real HTML slide style from the template gallery: Deep navy canvas with warm-yellow Cormorant serifs and a single dusty teal accent. Best for Research synthesis, white papers, academic briefs, founder reflections."
colors:
  primary: "#3A7878"
  accent: "#3A7878"
  background: "#2A3870"
  surface: "#343F80"
  text-primary: "#E8D85C"
  border: "#3A7878"
typography:
  display-xl:
    fontFamily: "Cormorant Garamond"
    fontWeight: 420
    letterSpacing: "0"
  body-md:
    fontFamily: "DM Sans"
    fontWeight: 400
rounded:
  md: 6px
---

# Vellum / Vellum

Style family: 模板画廊 · HTML Deck Styles

## Template Gallery Signals

Template slug: vellum
Native slide count: 9
Navigation: inline keyboard handler
Formality: high
Density: low
Scheme: dark
Display font: Cormorant Garamond
Body font: DM Sans

Best for:

- Research synthesis, white papers, academic briefs, founder reflections.

Avoid for:

- Decks needing heat or pop.

Occasion tags:

- research findings
- white paper or longform report
- academic or university deck
- advisory deliverable

Tone tags:

- literary
- considered
- patient
- intelligent

## Cleo Directive

Use this as a candidate PPT Style design system. Cleo must judge fit first, then output an adapted or recreated style contract with candidateSlug=ppt-style-template-vellum, visual rationale, tokens, layout tendencies, and anti-rules.

## Mood

- scholarly
- literary
- considered
- quiet
- intellectual

## Layout Rules

- Cleo 必须按 mood、tone、occasion、best_for、formality、density、scheme 做风格匹配；这是一套闭合模板系统。
- 保留 Cormorant Garamond / DM Sans、调色板、网格节奏、装饰语言和导航姿态；不要和其他模板混搭。
- 先用真实用户主题替换 demo 文案，再扩展逐页内容；不允许把模板说明、prompt 原文或“如何制作 PPT”的过程写进页面。
- 如果用户没有指定具体模板，Cleo 可以基于场景和情绪推荐 3 个候选，但最终 deck 只采用一个模板系统。

## Forbidden

- 不输出 PPTX；v1 只生成 HTML Deck。
- 不保留 [必填]、TODO、SLIDES_HERE 或模板注释残留。
- 不让模型改坏固定导航脚本、stage 尺寸或 overview 结构。
- 不要用于：Decks needing heat or pop.
- 不要把 模板画廊当作普通 Skill；它只属于 PPT Style 设计系统资源。
- 不要保留模板示例里的品牌、数字、人物、按钮文案或占位截图。

## Sable Boundary

This resource is not a special Skill. Sable may cite generation and QA skills, but must not select this PPT style as a skill.

## Prompt Lines

- Cleo evaluates candidate ppt-style-template-vellum from the PPT Style library, then adapts or recreates the final style contract.
- Deck artifact remains HTML with metadata artifactType=ppt-deck.
- Elara uses Cleo's adapted style contract with Sable's PPT generation skills.