flowchart TD
    subgraph PS["🎯 Product Strategy"]
        PS1[Product Strategy 會議<br/>月度層級] --> PS2[POs 提出 Epic / PBI<br/>討論策略與優先級]
        PS2 --> PS3[PBI 排序<br/>粗略排入未來 Sprint]
    end

    subgraph ID["🎨 Initial Design"]
        ID1[PO + PD 初步設計<br/>UI Flow / 機制草案] --> ID2[產出初版 Spec<br/>供技術團隊評估]
    end

    subgraph VR["🔍 Value Refinement"]
        VR1[Value Refinement 會議<br/>Sprint 間召開] --> VR2[PO 帶初版設計與工程團隊討論<br/>釐清技術細節與考量點]
        VR2 --> VR3[拆分成更小的 PBI<br/>確認 Scope / USAC / 可行性]
    end

    subgraph DR["✅ Final Design Review & Sprint Goal"]
        DR1[PO 約 CPO 進行<br/>Final Design Review] --> DR2[確認最終 Spec / UI / 機制設計<br/>整合技術回饋]
        DR2 --> SG1[Sprint Goal Review 會議<br/>Sprint 前召開]
        SG1 --> SG2[Final Review PBI Spec<br/>確認進入 Sprint 的項目]
    end

    subgraph SP["⚡ Sprint 執行（2 週）"]
        direction TB
        SP1[Sprint Planning<br/>Issue 拆解 + Story Point] --> SP2[PBI → Project<br/>拆分為功能 Issue + Sub-issue]
        SP2 --> SP3[開發<br/>Value / Activation / Monetization<br/>三團隊平行]
        SP3 --> SP4[PR Merge → POPD Review<br/>PO + PD 審核]
    end

    subgraph QA["🧪 Testing"]
        QA1[進入 Testing Milestone] --> QA2[各平台獨立測試 Issue<br/>iOS Alpha / Android Alpha]
        QA2 --> QA3{測試結果}
        QA3 -->|發現 Bug| QA4[建立新 Bug Issue<br/>→ Ready for Fix]
        QA4 --> QA5[工程師修復<br/>→ In Review]
        QA5 --> QA2
        QA3 -->|全部通過| QA6[測試完成 ✓]
    end

    subgraph RL["🚀 Release & Deploy"]
        RL1[Release Checklist<br/>動態檢查：依平台標籤] --> RL2[送審<br/>In Review → Done]
        RL2 --> SR[Sprint Review 會議<br/>Demo + Feedback]
        SR --> RL3[部署上線<br/>PBI → Deployed ✅]
    end

    PS3 --> ID1
    ID2 --> VR1
    VR3 --> DR1
    SG2 --> SP1
    SP4 --> QA1
    QA6 --> RL1

    style PS fill:#e8f4fd,stroke:#1890ff
    style ID fill:#fff0f6,stroke:#eb2f96
    style VR fill:#fff7e6,stroke:#faad14
    style DR fill:#f6ffed,stroke:#52c41a
    style SP fill:#f9f0ff,stroke:#722ed1
    style QA fill:#fff1f0,stroke:#f5222d
    style RL fill:#e6fffb,stroke:#13c2c2

flowchart LR
    subgraph TEAMS["產品開發團隊"]
        direction TB
        PO1[PO: Sherridy] --> VT[Value Team<br/>工程師 + 設計師]
        PO1 --> AT[Activation Team<br/>工程師 + 設計師]
        PO2[PO: Shawn] --> MT[Monetization Team<br/>工程師 + 設計師]
    end

    CPO[CPO: Marcus] -.->|Design Review| PO1
    CPO -.->|Design Review| PO2
    CTO[CTO: Ezou] -.->|Tech Lead<br/>Backlog Refinement| TEAMS
    PMO[PMO: David] -.->|流程管理<br/>Linear 自動化| TEAMS