diff --git a/.tasks/2025-11-11_1_crystal-system.md b/.tasks/2025-11-11_1_crystal-system.md
new file mode 100644
index 0000000..d5c583e
--- /dev/null
+++ b/.tasks/2025-11-11_1_crystal-system.md
@@ -0,0 +1,34 @@
+# 背景
+文件名：2025-11-11_1
+创建于：2025-11-11_21:49:00
+创建者：ASUS
+主分支：main
+任务分支：无
+Yolo模式：Off
+
+# 任务描述
+新增高级水晶系统，依赖菜园系统与冒险系统，能够复用其已注册的前置物品；水晶插件需要向商店注册水晶商品，提供水晶变色（如消耗99炉灰并等待一小时获得黑色水晶卷轴），并向炼金系统注册物品配方（黑色水晶卷轴*2 + 水晶 => 黑水晶）等交互。
+
+# 项目概览
+现有插件式框架包含菜园、冒险、炼金等系统，均提供接口供新插件注册物品、商店条目与炼金配方；PWF核心定义了插件基类、配置与依赖管理逻辑。
+
+# 分析
+待梳理菜园系统、冒险系统及相关物品注册接口的实现细节，以确认水晶系统能够复用的资源与依赖顺序；同时需要了解商店与炼金系统的注册流程与数据模型约束。
+
+# 提议的解决方案
+- 编写新的 `WPSCrystalSystem` 插件，依赖背包、商店、炼金等核心模块，初始化时完成水晶物品、配方与以物易物挂载，并通过调度器复用待机任务。
+- 使用链式炼金拆分颜色演化（炉灰→粉尘→卷轴→水晶），同时为每种颜色配置等待流程与最终融合配方，确保常量均可配置化。
+- 引入专属数据库表 `crystal_records` 记录变色/兑换流程状态，结合调度器在系统重启后恢复任务。
+- 提供指令入口 `水晶`，支持 `变色`、`兑换`、`列表` 等子命令，并返回 Markdown 状态。
+
+# 当前执行步骤："执行水晶系统实现"
+
+# 任务进度
+2025-11-11_21:49:00
+- 完成水晶模型、服务与主插件代码，注册物品与配方，并接入调度器、商店及指令交互。
+2025-11-11_22:30:00
+- 调整指令展示与兑换匹配逻辑，补充中文名称映射；基础材料获取途径尚待设计。
+
+# 最终审查
+未完成
+
diff --git a/Plugins/WPSCrystalSystem/__init__.py b/Plugins/WPSCrystalSystem/__init__.py
new file mode 100644
index 0000000..7827e2f
--- /dev/null
+++ b/Plugins/WPSCrystalSystem/__init__.py
@@ -0,0 +1,6 @@
+"""Crystal system plugin exports."""
+
+from .crystal_plugin_base import WPSCrystalSystem
+
+__all__ = ["WPSCrystalSystem"]
+
diff --git a/Plugins/WPSCrystalSystem/crystal_models.py b/Plugins/WPSCrystalSystem/crystal_models.py
new file mode 100644
index 0000000..84f4ad5
--- /dev/null
+++ b/Plugins/WPSCrystalSystem/crystal_models.py
@@ -0,0 +1,248 @@
+"""Core data models and default configuration for the crystal system."""
+
+from __future__ import annotations
+
+from dataclasses import dataclass, field
+from typing import Dict, List, Mapping, Optional, Sequence, Tuple
+
+from Plugins.WPSAlchemyGame import WPSAlchemyGame
+from Plugins.WPSBackpackSystem import BackpackItemTier
+
+
+@dataclass(frozen=True)
+class CrystalItemDefinition:
+    """Definition of a crystal-related item."""
+
+    item_id: str
+    name: str
+    tier: BackpackItemTier
+    description: str
+
+
+@dataclass(frozen=True)
+class CrystalRecipeStage:
+    """A single stage recipe that is registered into the alchemy system."""
+
+    identifier: str
+    materials: Tuple[str, str, str]
+    result_item: str
+    fail_item: str
+    base_success_rate: float
+    description: str = ""
+
+
+@dataclass(frozen=True)
+class CrystalWaitStage:
+    """A stage describing a delayed transformation outside the alchemy system."""
+
+    identifier: str
+    consumed_items: Mapping[str, int]
+    produced_item: str
+    delay_minutes: int
+    message: str = ""
+
+
+@dataclass(frozen=True)
+class CrystalFinalFusion:
+    """Final fusion recipe that converts scrolls and base crystals to coloured crystals."""
+
+    identifier: str
+    materials: Tuple[str, str, str]
+    result_item: str
+    fail_item: str
+    base_success_rate: float
+    description: str = ""
+
+
+@dataclass(frozen=True)
+class CrystalExchangeEntry:
+    """Definition of a crystal barter/exchange offer."""
+
+    identifier: str
+    required_items: Mapping[str, int]
+    reward_item: str
+    reward_amount: int = 1
+    metadata: Mapping[str, str] = field(default_factory=dict)
+
+
+@dataclass(frozen=True)
+class CrystalColorDefinition:
+    """Full definition for a colour pipeline."""
+
+    color_key: str
+    display_name: str
+    chain_stages: Sequence[CrystalRecipeStage]
+    wait_stage: CrystalWaitStage
+    final_fusion: CrystalFinalFusion
+
+
+CRYSTAL_BASE_ITEM_ID = "crystal_base_core"
+CRYSTAL_BASE_SCROLL_ID = "crystal_base_scroll"
+CRYSTAL_TINT_POWDER_ID = "crystal_tint_powder"
+CRYSTAL_RESONANCE_POWDER_ID = "crystal_resonance_powder"
+
+
+def _build_black_color_definition() -> CrystalColorDefinition:
+    """Construct default chain definition for black crystal."""
+
+    stage1 = CrystalRecipeStage(
+        identifier="black_stage_1",
+        materials=(
+            WPSAlchemyGame.ASH_ITEM_ID,
+            WPSAlchemyGame.ASH_ITEM_ID,
+            CRYSTAL_TINT_POWDER_ID,
+        ),
+        result_item="crystal_black_dust_stage1",
+        fail_item=WPSAlchemyGame.ASH_ITEM_ID,
+        base_success_rate=0.9,
+        description="将炉灰与变色粉尘融合成初阶黑色粉尘。",
+    )
+    stage2 = CrystalRecipeStage(
+        identifier="black_stage_2",
+        materials=(
+            stage1.result_item,
+            stage1.result_item,
+            CRYSTAL_RESONANCE_POWDER_ID,
+        ),
+        result_item="crystal_black_dust_stage2",
+        fail_item=WPSAlchemyGame.ASH_ITEM_ID,
+        base_success_rate=0.75,
+        description="压缩初阶粉尘并注入共鸣粉形成高阶粉尘。",
+    )
+    scroll_stage = CrystalRecipeStage(
+        identifier="black_scroll_alchemy",
+        materials=(
+            stage2.result_item,
+            stage2.result_item,
+            CRYSTAL_BASE_SCROLL_ID,
+        ),
+        result_item="crystal_black_scroll",
+        fail_item=WPSAlchemyGame.ASH_ITEM_ID,
+        base_success_rate=0.65,
+        description="将高阶粉尘灌注到卷轴之上，得出黑色变色卷轴。",
+    )
+
+    wait_stage = CrystalWaitStage(
+        identifier="black_scroll_darkening",
+        consumed_items={
+            WPSAlchemyGame.ASH_ITEM_ID: 99,
+            "crystal_black_scroll": 1,
+        },
+        produced_item="crystal_black_scroll_charged",
+        delay_minutes=60,
+        message="黑色变色卷轴正在吸收阴焰，预计一小时后完成。",
+    )
+
+    final_fusion = CrystalFinalFusion(
+        identifier="black_crystal_fusion",
+        materials=(
+            wait_stage.produced_item,
+            wait_stage.produced_item,
+            CRYSTAL_BASE_ITEM_ID,
+        ),
+        result_item="crystal_black_core",
+        fail_item=WPSAlchemyGame.ASH_ITEM_ID,
+        base_success_rate=0.7,
+        description="两张黑色卷轴共鸣后唤醒基础晶核，形成黑水晶。",
+    )
+
+    return CrystalColorDefinition(
+        color_key="black",
+        display_name="黑色水晶",
+        chain_stages=[stage1, stage2, scroll_stage],
+        wait_stage=wait_stage,
+        final_fusion=final_fusion,
+    )
+
+
+DEFAULT_CRYSTAL_ITEMS: Dict[str, CrystalItemDefinition] = {
+    CRYSTAL_BASE_ITEM_ID: CrystalItemDefinition(
+        item_id=CRYSTAL_BASE_ITEM_ID,
+        name="未调谐晶核",
+        tier=BackpackItemTier.RARE,
+        description="天然形成的晶核，等待注入颜色与秩序。",
+    ),
+    CRYSTAL_BASE_SCROLL_ID: CrystalItemDefinition(
+        item_id=CRYSTAL_BASE_SCROLL_ID,
+        name="空白变色卷轴",
+        tier=BackpackItemTier.RARE,
+        description="允许运色粉尘封印其上，作为变色的载体。",
+    ),
+    CRYSTAL_TINT_POWDER_ID: CrystalItemDefinition(
+        item_id=CRYSTAL_TINT_POWDER_ID,
+        name="变色粉尘",
+        tier=BackpackItemTier.COMMON,
+        description="常见的变色媒介，可与炉灰混合产生初阶粉尘。",
+    ),
+    CRYSTAL_RESONANCE_POWDER_ID: CrystalItemDefinition(
+        item_id=CRYSTAL_RESONANCE_POWDER_ID,
+        name="共鸣粉末",
+        tier=BackpackItemTier.RARE,
+        description="能触发粉尘的共鸣性，有助于稳定高阶色谱。",
+    ),
+    "crystal_black_dust_stage1": CrystalItemDefinition(
+        item_id="crystal_black_dust_stage1",
+        name="黑色粉尘-初阶",
+        tier=BackpackItemTier.RARE,
+        description="微量黑色素的粉尘，需要进一步压缩。",
+    ),
+    "crystal_black_dust_stage2": CrystalItemDefinition(
+        item_id="crystal_black_dust_stage2",
+        name="黑色粉尘-高阶",
+        tier=BackpackItemTier.EPIC,
+        description="高纯度黑色粉尘，可用于制作黑色卷轴。",
+    ),
+    "crystal_black_scroll": CrystalItemDefinition(
+        item_id="crystal_black_scroll",
+        name="黑色变色卷轴",
+        tier=BackpackItemTier.EPIC,
+        description="封装黑色粉尘力量的卷轴，但仍需阴焰淬炼。",
+    ),
+    "crystal_black_scroll_charged": CrystalItemDefinition(
+        item_id="crystal_black_scroll_charged",
+        name="淬炼黑色卷轴",
+        tier=BackpackItemTier.EPIC,
+        description="经历阴焰淬炼的黑色卷轴，适合唤醒晶核。",
+    ),
+    "crystal_black_core": CrystalItemDefinition(
+        item_id="crystal_black_core",
+        name="黑水晶",
+        tier=BackpackItemTier.LEGENDARY,
+        description="浓缩黑暗能量的晶体，可在多系统中作为高级材料。",
+    ),
+}
+
+
+DEFAULT_CRYSTAL_COLOR_MAP: Dict[str, CrystalColorDefinition] = {
+    "black": _build_black_color_definition(),
+}
+
+
+DEFAULT_CRYSTAL_EXCHANGE_ENTRIES: Dict[str, CrystalExchangeEntry] = {
+    "exchange_black_scroll": CrystalExchangeEntry(
+        identifier="exchange_black_scroll",
+        required_items={
+            "crystal_black_dust_stage2": 2,
+            "crystal_tint_powder": 5,
+        },
+        reward_item="crystal_black_scroll",
+        metadata={
+            "category": "scroll",
+            "display_name": "黑色变色卷轴兑换",
+        },
+    ),
+    "exchange_black_core": CrystalExchangeEntry(
+        identifier="exchange_black_core",
+        required_items={
+            "crystal_black_scroll_charged": 1,
+            CRYSTAL_BASE_ITEM_ID: 1,
+            "combat_material_crystal": 2,
+        },
+        reward_item="crystal_black_core",
+        metadata={
+            "category": "crystal",
+            "display_name": "黑水晶兑换",
+        },
+    ),
+}
+
diff --git a/Plugins/WPSCrystalSystem/crystal_plugin_base.py b/Plugins/WPSCrystalSystem/crystal_plugin_base.py
new file mode 100644
index 0000000..8daf090
--- /dev/null
+++ b/Plugins/WPSCrystalSystem/crystal_plugin_base.py
@@ -0,0 +1,374 @@
+"""Crystal system primary plugin implementation."""
+
+from __future__ import annotations
+
+from datetime import datetime, timezone
+from typing import Dict, List, Mapping, Optional, Tuple
+
+from PWF.Convention.Runtime.Architecture import Architecture
+from PWF.Convention.Runtime.GlobalConfig import ConsoleFrontColor, ProjectConfig
+from PWF.CoreModules.clock_scheduler import get_clock_scheduler
+from PWF.CoreModules.plugin_interface import DatabaseModel
+
+from Plugins.WPSAPI import WPSAPI
+from Plugins.WPSAlchemyGame import WPSAlchemyGame
+from Plugins.WPSBackpackSystem import WPSBackpackSystem
+from Plugins.WPSStoreSystem import WPSStoreSystem
+
+from .crystal_models import (
+    DEFAULT_CRYSTAL_COLOR_MAP,
+    DEFAULT_CRYSTAL_EXCHANGE_ENTRIES,
+    DEFAULT_CRYSTAL_ITEMS,
+    CrystalColorDefinition,
+    CrystalExchangeEntry,
+    CrystalItemDefinition,
+)
+from .crystal_service import get_crystal_db_models, get_crystal_service
+
+
+logger: ProjectConfig = Architecture.Get(ProjectConfig)
+
+
+class WPSCrystalSystem(WPSAPI):
+    """Main crystal system plugin."""
+
+    _initialized: bool = False
+
+    def __init__(self) -> None:
+        super().__init__()
+        self._service = get_crystal_service()
+        self._items: Dict[str, CrystalItemDefinition] = dict(DEFAULT_CRYSTAL_ITEMS)
+        self._colors: Dict[str, CrystalColorDefinition] = dict(DEFAULT_CRYSTAL_COLOR_MAP)
+        self._exchange_entries: Dict[str, CrystalExchangeEntry] = {
+            key.lower(): value for key, value in DEFAULT_CRYSTAL_EXCHANGE_ENTRIES.items()
+        }
+
+    # ------------------------------------------------------------------ #
+    # Plugin lifecycle
+    # ------------------------------------------------------------------ #
+
+    def dependencies(self) -> List[type]:
+        return [
+            WPSAPI,
+            WPSBackpackSystem,
+            WPSStoreSystem,
+            WPSAlchemyGame,
+        ]
+
+    def register_db_model(self) -> List[DatabaseModel]:
+        return get_crystal_db_models()
+
+    def wake_up(self) -> None:
+        if WPSCrystalSystem._initialized:
+            return
+        WPSCrystalSystem._initialized = True
+
+        backpack: WPSBackpackSystem = Architecture.Get(WPSBackpackSystem)
+        store: WPSStoreSystem = Architecture.Get(WPSStoreSystem)
+        alchemy: WPSAlchemyGame = Architecture.Get(WPSAlchemyGame)
+
+        self._ensure_prerequisite_items(backpack)
+
+        self._service.register_items(backpack, self._items)
+
+        for color_def in self._colors.values():
+            self._service.register_chain_recipes(alchemy, color_def.chain_stages)
+            self._service.register_final_fusion(alchemy, color_def.final_fusion)
+
+        self._service.register_exchange_modes(store, self._items, self._exchange_entries)
+
+        self._recover_wait_tasks()
+        self.register_plugin("crystal")
+        self.register_plugin("水晶")
+
+        logger.Log(
+            "Info",
+            f"{ConsoleFrontColor.GREEN}WPSCrystalSystem 插件已加载，当前颜色数：{len(self._colors)}{ConsoleFrontColor.RESET}",
+        )
+
+    # ------------------------------------------------------------------ #
+    # Scheduler recovery & callbacks
+    # ------------------------------------------------------------------ #
+
+    def _recover_wait_tasks(self) -> None:
+        scheduler = get_clock_scheduler()
+        pending_tasks = self._service.recover_pending_wait_flows()
+        for task in pending_tasks:
+            delay_ms = task.get("delay_ms", 0)
+            record_id = task["record_id"]
+            task_id = scheduler.register_task(
+                plugin_module=self.__module__,
+                plugin_class=self.__class__.__name__,
+                callback_name="complete_wait_flow",
+                delay_ms=delay_ms,
+                kwargs={"record_id": record_id},
+            )
+            self._service.update_task_binding(record_id, task_id)
+
+    async def complete_wait_flow(self, record_id: int) -> None:
+        info = self._service.mark_wait_flow_completed(record_id)
+        if not info:
+            return
+        chat_id = int(info["chat_id"])
+        user_id = int(info["user_id"])
+        produced_item = info["produced_item"]
+        message = (
+            "# ⏱️ 水晶淬炼完成\n"
+            f"- 用户：`{user_id}`\n"
+            f"- 获得物品：`{produced_item}`\n"
+            f"- 时间：{datetime.now(timezone.utc).strftime('%Y-%m-%d %H:%M:%S')}"
+        )
+        self._service.update_task_binding(record_id, None)
+        await self.send_markdown_message(message, chat_id, user_id)
+
+    # ------------------------------------------------------------------ #
+    # Command handling
+    # ------------------------------------------------------------------ #
+
+    async def callback(self, message: str, chat_id: int, user_id: int) -> Optional[str]:
+        payload = self.parse_message_after_at(message).strip()
+        if not payload:
+            return await self._send_help(chat_id, user_id)
+        tokens = payload.split()
+        if not tokens:
+            return await self._send_help(chat_id, user_id)
+
+        action = tokens[0].lower()
+        if action in {"help", "帮助"}:
+            return await self._send_help(chat_id, user_id)
+        if action in {"变色", "color"}:
+            color_key = tokens[1] if len(tokens) > 1 else ""
+            return await self._handle_color_wait(chat_id, user_id, color_key)
+        if action in {"兑换", "exchange"}:
+            exchange_key = tokens[1] if len(tokens) > 1 else ""
+            return await self._handle_exchange(chat_id, user_id, exchange_key)
+        if action in {"列表", "list"}:
+            return await self._send_overview(chat_id, user_id)
+        return await self._send_help(chat_id, user_id)
+
+    # ------------------------------------------------------------------ #
+    # Helper methods
+    # ------------------------------------------------------------------ #
+
+    async def _send_help(self, chat_id: int, user_id: int) -> Optional[str]:
+        lines = [
+            "# 💎 水晶系统指令",
+            "- `水晶 变色 <颜色>`：启动对应颜色的淬炼流程。",
+            "- `水晶 兑换 <ID>`：使用物品兑换指定奖励。",
+            "- `水晶 列表`：查看可用颜色与兑换信息。",
+        ]
+        return await self.send_markdown_message("\n".join(lines), chat_id, user_id)
+
+    async def _send_overview(self, chat_id: int, user_id: int) -> Optional[str]:
+        lines = ["# 📦 水晶配置一览"]
+        backpack: WPSBackpackSystem = Architecture.Get(WPSBackpackSystem)
+        for color_def in self._colors.values():
+            wait_cost = self._format_item_requirements(
+                backpack, color_def.wait_stage.consumed_items
+            )
+            lines.append(
+                f"- {color_def.display_name}｜阶段：{len(color_def.chain_stages)}｜等待消耗：{wait_cost}"
+            )
+        lines.append("\n## 🔄 兑换项目")
+        for entry in self._exchange_entries.values():
+            cost = self._format_item_requirements(backpack, entry.required_items)
+            reward_name = self._resolve_item_name(backpack, entry.reward_item)
+            display_name = entry.metadata.get("display_name") or reward_name
+            lines.append(
+                f"- {display_name}（{entry.identifier}）｜消耗：{cost}｜奖励：{reward_name}"
+            )
+        return await self.send_markdown_message("\n".join(lines), chat_id, user_id)
+
+    async def _handle_color_wait(
+        self,
+        chat_id: int,
+        user_id: int,
+        color_key: str,
+    ) -> Optional[str]:
+        if not color_key:
+            return await self.send_markdown_message("❌ 请指定颜色，例如 `水晶 变色 黑色`", chat_id, user_id)
+        color_def = self._resolve_color(color_key)
+        if not color_def:
+            return await self.send_markdown_message("❌ 未找到对应颜色配置。", chat_id, user_id)
+        backpack: WPSBackpackSystem = Architecture.Get(WPSBackpackSystem)
+        missing = self._check_item_requirements(
+            backpack, user_id, color_def.wait_stage.consumed_items
+        )
+        if missing:
+            formatted = ", ".join(
+                f"{self._resolve_item_name(backpack, item)}×{amount}" for item, amount in missing
+            )
+            return await self.send_markdown_message(
+                f"❌ 材料不足：{formatted}", chat_id, user_id
+            )
+
+        # Deduct materials
+        self._deduct_items(backpack, user_id, color_def.wait_stage.consumed_items)
+
+        record_id, expected_end = self._service.create_wait_record(
+            color_def, color_def.wait_stage, user_id, chat_id
+        )
+        delay_ms = max(
+            int((expected_end - datetime.now(timezone.utc)).total_seconds() * 1000), 0
+        )
+        scheduler = get_clock_scheduler()
+        task_id = scheduler.register_task(
+            plugin_module=self.__module__,
+            plugin_class=self.__class__.__name__,
+            callback_name="complete_wait_flow",
+            delay_ms=delay_ms,
+            kwargs={"record_id": record_id},
+        )
+        self._service.update_task_binding(record_id, task_id)
+
+        time_str = expected_end.strftime("%Y-%m-%d %H:%M")
+        msg = (
+            "# 🔁 水晶淬炼已排程\n"
+            f"- 颜色：{color_def.display_name}\n"
+            f"- 预计完成：{time_str}\n"
+            "- 完成后会自动发放淬炼产物。"
+        )
+        return await self.send_markdown_message(msg, chat_id, user_id)
+
+    async def _handle_exchange(
+        self,
+        chat_id: int,
+        user_id: int,
+        exchange_key: str,
+    ) -> Optional[str]:
+        backpack: WPSBackpackSystem = Architecture.Get(WPSBackpackSystem)
+        if not exchange_key:
+            example = self._default_exchange_example(backpack)
+            return await self.send_markdown_message(
+                f"❌ 请提供兑换ID或名称，例如 `水晶 兑换 {example}`", chat_id, user_id
+            )
+        entry = self._resolve_exchange_entry(exchange_key, backpack)
+        if not entry:
+            available = ", ".join(
+                entry.metadata.get("display_name", entry.identifier)
+                for entry in self._exchange_entries.values()
+            )
+            return await self.send_markdown_message(
+                f"❌ 未找到对应的兑换项目。可用选项：{available}", chat_id, user_id
+            )
+        missing = self._check_item_requirements(backpack, user_id, entry.required_items)
+        if missing:
+            formatted = ", ".join(
+                f"{self._resolve_item_name(backpack, item)}×{amount}" for item, amount in missing
+            )
+            return await self.send_markdown_message(f"❌ 兑换所需物品不足：{formatted}", chat_id, user_id)
+        self._deduct_items(backpack, user_id, entry.required_items)
+        backpack.add_item(user_id, entry.reward_item, entry.reward_amount)
+        reward_name = self._resolve_item_name(backpack, entry.reward_item)
+        display_name = entry.metadata.get("display_name") or reward_name
+        msg = (
+            "# 🔄 兑换成功\n"
+            f"- 项目：{display_name}\n"
+            f"- 奖励：{reward_name} × {entry.reward_amount}"
+        )
+        return await self.send_markdown_message(msg, chat_id, user_id)
+
+    def _ensure_prerequisite_items(self, backpack: WPSBackpackSystem) -> None:
+        """Verify key prerequisite materials exist, log warnings otherwise."""
+
+        required_items = [
+            "combat_material_crystal",
+            "combat_material_essence",
+            "garden_wine_maple",
+            "garden_wine_sage",
+        ]
+        missing = []
+        for item_id in required_items:
+            try:
+                backpack.add_item(0, item_id, 0)
+            except Exception:
+                missing.append(item_id)
+        if missing:
+            logger.Log(
+                "Warning",
+                f"{ConsoleFrontColor.YELLOW}水晶系统启动时发现缺少前置物品: {', '.join(missing)}{ConsoleFrontColor.RESET}",
+            )
+
+    def _resolve_color(self, key: str) -> Optional[CrystalColorDefinition]:
+        lowered = key.lower()
+        if lowered in self._colors:
+            return self._colors[lowered]
+        for color_def in self._colors.values():
+            if color_def.display_name.lower() == lowered:
+                return color_def
+        return None
+
+    def _format_item_requirements(
+        self, backpack: WPSBackpackSystem, items: Mapping[str, int]
+    ) -> str:
+        return (
+            ", ".join(
+                f"{self._resolve_item_name(backpack, item_id)}×{amount}"
+                for item_id, amount in items.items()
+            )
+            or "无"
+        )
+
+    def _check_item_requirements(
+        self,
+        backpack: WPSBackpackSystem,
+        user_id: int,
+        requirements: Mapping[str, int],
+    ) -> List[Tuple[str, int]]:
+        missing: List[Tuple[str, int]] = []
+        for item_id, amount in requirements.items():
+            current = backpack.add_item(user_id, item_id, 0)
+            if current < amount:
+                missing.append((item_id, amount - current))
+        return missing
+
+    def _deduct_items(
+        self,
+        backpack: WPSBackpackSystem,
+        user_id: int,
+        requirements: Mapping[str, int],
+    ) -> None:
+        for item_id, amount in requirements.items():
+            current = backpack.add_item(user_id, item_id, 0)
+            backpack.set_item_quantity(user_id, item_id, max(current - amount, 0))
+
+    def _resolve_item_name(self, backpack: WPSBackpackSystem, item_id: str) -> str:
+        try:
+            definition = backpack._get_definition(item_id)
+            return definition.name
+        except Exception:
+            return item_id
+
+    def _resolve_exchange_entry(
+        self, key: str, backpack: WPSBackpackSystem
+    ) -> Optional[CrystalExchangeEntry]:
+        lowered = key.strip().lower()
+        if not lowered:
+            return None
+        direct = self._exchange_entries.get(lowered)
+        if direct:
+            return direct
+        for entry in self._exchange_entries.values():
+            if entry.identifier.lower() == lowered:
+                return entry
+            display_name = entry.metadata.get("display_name")
+            if display_name and display_name.lower() == lowered:
+                return entry
+            if entry.reward_item.lower() == lowered:
+                return entry
+            reward_name = self._resolve_item_name(backpack, entry.reward_item)
+            if reward_name.lower() == lowered:
+                return entry
+        return None
+
+    def _default_exchange_example(self, backpack: WPSBackpackSystem) -> str:
+        for entry in self._exchange_entries.values():
+            display_name = entry.metadata.get("display_name")
+            if display_name:
+                return display_name
+            reward_name = self._resolve_item_name(backpack, entry.reward_item)
+            if reward_name:
+                return reward_name
+            return entry.identifier
+        return "exchange_id"
+
diff --git a/Plugins/WPSCrystalSystem/crystal_service.py b/Plugins/WPSCrystalSystem/crystal_service.py
new file mode 100644
index 0000000..c36e418
--- /dev/null
+++ b/Plugins/WPSCrystalSystem/crystal_service.py
@@ -0,0 +1,310 @@
+"""Service layer for the crystal system."""
+
+from __future__ import annotations
+
+import json
+from datetime import datetime, timedelta, timezone
+from typing import Dict, List, Mapping, Optional, Sequence, Tuple
+
+from PWF.Convention.Runtime.Architecture import Architecture
+from PWF.Convention.Runtime.GlobalConfig import ConsoleFrontColor, ProjectConfig
+from PWF.CoreModules.database import STATUS_PENDING, Database, get_db
+from PWF.CoreModules.plugin_interface import DatabaseModel
+
+from Plugins.WPSAlchemyGame import WPSAlchemyGame
+from Plugins.WPSBackpackSystem import BackpackItemTier, WPSBackpackSystem
+from Plugins.WPSStoreSystem import WPSStoreSystem
+
+from .crystal_models import (
+    CRYSTAL_BASE_ITEM_ID,
+    CrystalColorDefinition,
+    CrystalExchangeEntry,
+    CrystalFinalFusion,
+    CrystalItemDefinition,
+    CrystalRecipeStage,
+    CrystalWaitStage,
+)
+
+
+CRYSTAL_TABLE_NAME = "crystal_records"
+
+
+def get_crystal_db_models() -> List[DatabaseModel]:
+    """Return database models required for the crystal system."""
+
+    return [
+        DatabaseModel(
+            table_name=CRYSTAL_TABLE_NAME,
+            column_defs={
+                "record_id": "INTEGER PRIMARY KEY AUTOINCREMENT",
+                "user_id": "INTEGER NOT NULL",
+                "chat_id": "INTEGER NOT NULL",
+                "flow_type": "TEXT NOT NULL",
+                "color_key": "TEXT",
+                "state": "TEXT NOT NULL",
+                "input_items": "TEXT NOT NULL",
+                "current_stage": "TEXT",
+                "expected_end_time": "TEXT",
+                "scheduled_task_id": "INTEGER",
+                "metadata": "TEXT",
+                "created_at": "TEXT NOT NULL",
+                "updated_at": "TEXT NOT NULL",
+            },
+        ),
+    ]
+
+
+class CrystalService:
+    """Encapsulates shared behaviours for the crystal system."""
+
+    def __init__(self) -> None:
+        self._db: Database = get_db()
+        self._config: ProjectConfig = Architecture.Get(ProjectConfig)
+        self._logger = self._config
+
+    # --------------------------------------------------------------------- #
+    # Registration helpers
+    # --------------------------------------------------------------------- #
+
+    def register_items(
+        self,
+        backpack: WPSBackpackSystem,
+        item_definitions: Mapping[str, CrystalItemDefinition],
+    ) -> None:
+        """Register crystal items into the backpack system."""
+
+        for definition in item_definitions.values():
+            try:
+                backpack.register_item(
+                    definition.item_id,
+                    definition.name,
+                    definition.tier,
+                    definition.description,
+                )
+            except Exception as exc:  # pylint: disable=broad-except
+                self._logger.Log(
+                    "Warning",
+                    f"{ConsoleFrontColor.YELLOW}注册水晶物品 {definition.item_id} 失败: {exc}{ConsoleFrontColor.RESET}",
+                )
+
+    def register_exchange_modes(
+        self,
+        store: WPSStoreSystem,
+        item_definitions: Mapping[str, CrystalItemDefinition],
+        exchange_entries: Mapping[str, CrystalExchangeEntry],
+    ) -> None:
+        """Register barter-friendly items into store system (as metadata only)."""
+
+        for entry in exchange_entries.values():
+            reward_def = item_definitions.get(entry.reward_item)
+            if reward_def is None:
+                continue
+            metadata = {"exchange": "true", **entry.metadata}
+            metadata["required_items"] = json.dumps(entry.required_items)
+            try:
+                store.register_mode(
+                    item_id=entry.reward_item,
+                    price=1,
+                    limit_amount=entry.reward_amount,
+                    metadata=metadata,
+                )
+            except Exception:
+                # Store可能会因模式重复而抛异常，这里忽略。
+                continue
+
+    def register_chain_recipes(
+        self,
+        alchemy: WPSAlchemyGame,
+        stages: Sequence[CrystalRecipeStage],
+    ) -> None:
+        """Register crystal chain recipes into alchemy system."""
+
+        for stage in stages:
+            try:
+                alchemy.register_recipe(
+                    stage.materials,
+                    stage.result_item,
+                    stage.fail_item,
+                    stage.base_success_rate,
+                )
+            except Exception as exc:  # pylint: disable=broad-except
+                self._logger.Log(
+                    "Warning",
+                    f"{ConsoleFrontColor.YELLOW}注册水晶配方 {stage.identifier} 失败: {exc}{ConsoleFrontColor.RESET}",
+                )
+
+    def register_final_fusion(
+        self,
+        alchemy: WPSAlchemyGame,
+        fusion: CrystalFinalFusion,
+    ) -> None:
+        """Register the final crystal fusion recipe."""
+
+        try:
+            alchemy.register_recipe(
+                fusion.materials,
+                fusion.result_item,
+                fusion.fail_item,
+                fusion.base_success_rate,
+            )
+        except Exception as exc:  # pylint: disable=broad-except
+            self._logger.Log(
+                "Warning",
+                f"{ConsoleFrontColor.YELLOW}注册终端水晶配方 {fusion.identifier} 失败: {exc}{ConsoleFrontColor.RESET}",
+            )
+
+    # --------------------------------------------------------------------- #
+    # Wait-flow handling
+    # --------------------------------------------------------------------- #
+
+    def create_wait_record(
+        self,
+        color_def: CrystalColorDefinition,
+        wait_stage: CrystalWaitStage,
+        user_id: int,
+        chat_id: int,
+    ) -> Tuple[int, datetime]:
+        """Create a wait-flow record and enqueue scheduler task."""
+
+        now = datetime.now(timezone.utc)
+        expected_end = now + timedelta(minutes=wait_stage.delay_minutes)
+        payload = {
+            "color_key": color_def.color_key,
+            "wait_stage": wait_stage.identifier,
+            "produced_item": wait_stage.produced_item,
+        }
+        cursor = self._db.conn.cursor()
+        cursor.execute(
+            f"""
+            INSERT INTO {CRYSTAL_TABLE_NAME} (
+                user_id, chat_id, flow_type, color_key, state, input_items,
+                current_stage, expected_end_time, metadata, created_at, updated_at
+            )
+            VALUES (?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?)
+            """,
+            (
+                user_id,
+                chat_id,
+                "wait_flow",
+                color_def.color_key,
+                STATUS_PENDING,
+                json.dumps(wait_stage.consumed_items),
+                wait_stage.identifier,
+                expected_end.isoformat(),
+                json.dumps(payload),
+                now.isoformat(),
+                now.isoformat(),
+            ),
+        )
+        record_id = cursor.lastrowid
+        self._db.conn.commit()
+        return int(record_id), expected_end
+
+    def update_task_binding(self, record_id: int, task_id: Optional[int]) -> None:
+        """Update the scheduled task binding for a record."""
+
+        cursor = self._db.conn.cursor()
+        cursor.execute(
+            f"UPDATE {CRYSTAL_TABLE_NAME} SET scheduled_task_id = ? WHERE record_id = ?",
+            (task_id, record_id),
+        )
+        self._db.conn.commit()
+
+    def mark_wait_flow_completed(self, record_id: int) -> Optional[Dict[str, str]]:
+        """Scheduler callback when a wait flow is ready."""
+
+        cursor = self._db.conn.cursor()
+        cursor.execute(
+            f"""
+            SELECT record_id, user_id, chat_id, metadata
+            FROM {CRYSTAL_TABLE_NAME}
+            WHERE record_id = ? AND flow_type = 'wait_flow'
+            """,
+            (record_id,),
+        )
+        row = cursor.fetchone()
+        if not row:
+            return None
+        metadata = json.loads(row["metadata"]) if row["metadata"] else {}
+        produced_item = metadata.get("produced_item")
+        user_id = int(row["user_id"])
+        chat_id = int(row["chat_id"])
+        payload = {
+            "state": "completed",
+            "updated_at": datetime.now(timezone.utc).isoformat(),
+        }
+        cursor.execute(
+            f"""
+            UPDATE {CRYSTAL_TABLE_NAME}
+            SET state = :state,
+                updated_at = :updated_at
+            WHERE record_id = :record_id
+            """,
+            {"state": "completed", "updated_at": payload["updated_at"], "record_id": record_id},
+        )
+        self._db.conn.commit()
+        if not produced_item:
+            return None
+        backpack: WPSBackpackSystem = Architecture.Get(WPSBackpackSystem)
+        try:
+            backpack.add_item(user_id, produced_item, 1)
+        except Exception as exc:  # pylint: disable=broad-except
+            self._logger.Log(
+                "Error",
+                f"{ConsoleFrontColor.RED}发放等待产物 {produced_item} 失败: {exc}{ConsoleFrontColor.RESET}",
+            )
+            return None
+        return {
+            "produced_item": produced_item,
+            "user_id": str(user_id),
+            "chat_id": str(chat_id),
+        }
+
+    # --------------------------------------------------------------------- #
+    # Recovery
+    # --------------------------------------------------------------------- #
+
+    def recover_pending_wait_flows(self) -> List[Dict[str, int]]:
+        """Recover pending wait-flow tasks when the plugin is reloaded."""
+
+        cursor = self._db.conn.cursor()
+        cursor.execute(
+            f"""
+            SELECT record_id, current_stage, expected_end_time, scheduled_task_id
+            FROM {CRYSTAL_TABLE_NAME}
+            WHERE flow_type = 'wait_flow' AND state = ?
+            """,
+            (STATUS_PENDING,),
+        )
+        rows = cursor.fetchall()
+        now = datetime.now(timezone.utc)
+        tasks: List[Dict[str, int]] = []
+        for row in rows:
+            record_id = int(row["record_id"])
+            expected_end = row["expected_end_time"]
+            scheduled_task_id = row["scheduled_task_id"]
+            delay_ms = 0
+            if expected_end:
+                try:
+                    target_dt = datetime.fromisoformat(expected_end)
+                    remaining = target_dt - now
+                    delay_ms = max(int(remaining.total_seconds() * 1000), 0)
+                except ValueError:
+                    delay_ms = 0
+            if scheduled_task_id:
+                continue
+            tasks.append({"record_id": record_id, "delay_ms": delay_ms})
+        return tasks
+
+
+_CRYSTAL_SERVICE: Optional[CrystalService] = None
+
+
+def get_crystal_service() -> CrystalService:
+    """Return singleton crystal service instance."""
+
+    global _CRYSTAL_SERVICE
+    if _CRYSTAL_SERVICE is None:
+        _CRYSTAL_SERVICE = CrystalService()
+    return _CRYSTAL_SERVICE
+