docs: clarify PPT style reference workflow

Clarify that users can provide screenshots or full PPT/PDF style references and save reusable styles into this skill's references directory.

Author: ningzimu

CHANGELOG.md

@@ -6,6 +6,7 @@ Release notes are generated from this file. Keep changelog entries in English.
 
 ### Documentation
 
+- Clarify that PPT style references can be screenshots or full PPT/PDF files, and that reusable styles can be saved into this skill's `references/` directory. (#24)
 - Add a README note about personalizing the codex-ppt workflow and include the good skill design deck. (#22)
 
 ### Improvements

README.md

@@ -192,7 +192,7 @@ skill 会按以下流程执行：
 
 - 默认脚本分辨率是 2K 16:9 横屏。如果生成的幻灯片图片比较模糊，尤其是文字较多的页面，可以让当前 agent 改用 4K 分辨率生成图片。
 - 如果只是不满意某一页的内容、排版、配色或文字表达，可以直接让当前 agent 针对这一页做细致修改，不需要整套 PPT 重新生成。
-- 你也可以上传一张喜欢的 PPT 风格截图或参考图，让当前 agent 模仿它的配色、版式、字体气质和视觉元素来生成整套 PPT。
+- 你也可以提供喜欢的 PPT 风格参考，可以是一张截图、多张截图，或完整 PPT/PDF。建议先让当前 agent 分析参考材料的配色、版式、字体和视觉元素，再按这个风格生成新 PPT。生成满意后，也可以让 agent 把这套风格保存到本技能的 `references/` 目录里，方便以后复用。
 - 如果需要插入论文原图、实验结果图、截图或架构图，可以在大纲中指定这些图片对应的页码和用途。
 
 ## 许可证

README_en.md

@@ -192,7 +192,7 @@ The skill follows this workflow:
 
 - The default script resolution is 2K 16:9 landscape. If generated slide images look blurry, especially on text-heavy pages, ask the current agent to generate the images at 4K resolution.
 - If you are unhappy with one specific slide's content, layout, colors, or wording, ask the current agent to refine that slide in detail instead of regenerating the whole deck.
-- You can also upload a screenshot or reference image of a PPT style you like, and ask the current agent to imitate its color palette, layout, typography feel, and visual elements.
+- You can also provide PPT style references you like — a single screenshot, multiple screenshots, or a full PPT/PDF. Ask the current agent to analyze the colors, layout, typography, and visual elements first, then generate a new deck in that style. Once the result looks good, you can ask the agent to save the style into this skill's `references/` directory for future reuse.
 - If you need to include paper figures, experiment charts, screenshots, or architecture diagrams, specify the target slide and role for each image in the outline.
 
 ## License