graph TD A[准备器具] --> B[称量咖啡豆] B --> C[研磨咖啡粉] C --> D[预热器具] D --> E[放置滤纸] E --> F[冲洗滤纸] F --> G[加入咖啡粉] G --> H[布粉] H --> I[第一次注水] I --> J[闷蒸30秒] J --> K[第二次注水] K --> L[第三次注水] L --> M[完成萃取] M --> N[移除滤纸] N --> O[清洁整理] style A fill:#f9f,stroke:#333 style O fill:#ccf,stroke:#333 classDef default fill:#ffe,stroke:#333,stroke-width:1px; classDef process fill:#ffc,stroke:#333; class A,B,C,D,E,F,G,H,I,J,K,L,M,N process