diff --git a/AGENTS.md b/AGENTS.md
new file mode 100644
index 0000000..74d3f76
--- /dev/null
+++ b/AGENTS.md
@@ -0,0 +1,120 @@
+# CarCost - Agent Instructions
+
+## Project Overview
+Full-stack vehicle expense tracking application.
+- **Frontend**: Vue 3 + Vite + Element Plus + ECharts (`web/`)
+- **Backend**: FastAPI + SQLAlchemy + PostgreSQL (`api/`)
+
+## Architecture
+
+### Monorepo Structure
+```
+web/src/
+├── App.vue                   # Main app component
+├── main.js                   # Entry with Element Plus + ECharts setup
+└── components/               # Reusable components
+    ├── panels/               # List panels with charts + table
+    │   ├── FuelRecordsPanel.vue   # Desktop & mobile shared
+    │   └── CostRecordsPanel.vue   # Desktop & mobile shared
+    ├── charts/               # Chart components
+    │   └── DashboardCharts.vue
+    ├── cards/                # Card components
+    │   └── StatsCards.vue
+    └── dialogs/              # Dialog components
+        ├── vehicle/
+        ├── fuel/
+        └── cost/
+```
+
+**Responsive Design Pattern**:
+- `App.vue` uses CSS media queries to switch between desktop/mobile layouts
+- `*Panel.vue` components handle both desktop and mobile via `showCharts`/`showList` props
+- Desktop: Dual-column layout with StatsCards + DashboardCharts + Panels side-by-side
+- Mobile: Single-column with view switching (dashboard/fuel/cost tabs)
+
+### API Routing Convention
+All API routes include `/carcost` prefix:
+- `/carcost/vehicles/*` - Vehicle CRUD
+- `/carcost/fuel_records/*` - Fuel records
+- `/carcost/costs/*` - Cost records
+- `/carcost/dashboard/*` - Dashboard data
+
+Frontend uses: `API_BASE = 'https://api.yuany3721.site/carcost'`
+
+### Database Models
+- **Vehicle**: `id`, `name`, `purchase_date`, `initial_mileage`, `is_deleted`
+- **FuelRecord**: `id`, `vehicle_id`, `date`, `mileage`, `fuel_amount`, `fuel_price`, `total_cost`, `is_full_tank`
+- **Cost**: `id`, `vehicle_id`, `date`, `type`, `amount`, `mileage`, `is_installment`, `installment_months`
+
+All models use soft delete (`is_deleted` boolean).
+
+## Development Commands
+
+### Backend (api/)
+```bash
+# Setup (requires Python 3.x)
+cd api
+python -m venv venv
+source venv/bin/activate
+pip install -r requirements.txt
+
+# Run dev server
+python main.py
+# or
+uvicorn main:app --host 0.0.0.0 --port 7030 --reload
+
+# Run tests
+python test_api.py
+```
+
+### Frontend (web/)
+```bash
+cd web
+npm install
+
+# Dev server (exposes to all hosts)
+npm run dev
+
+# Build for production
+npm run build
+
+# Preview production build
+npm run preview
+```
+
+## Key Configuration Files
+
+### api/.env
+```
+DATABASE_URL=postgresql://user:pass@host:port/carcost
+DEBUG=true
+```
+
+### web/vite.config.js
+- `server.allowedHosts: ['yuany3721.site', '.yuany3721.site']` - Required for production domain access
+
+## Code Patterns
+
+### Frontend (Vue 3 Composition API)
+- Uses `<script setup>` syntax
+- Element Plus for UI components (with Chinese text labels)
+- ECharts registered globally via `vue-echarts`
+- Axios for API calls
+- Responsive design with mobile/desktop layouts
+
+### Backend (FastAPI)
+- Routers auto-create tables via `Base.metadata.create_all()`
+- CORS configured for all origins (dev-friendly, restrict in production)
+- SQLAlchemy 2.0 style with `declarative_base()`
+- Database connection pooling: `pool_size=5, max_overflow=10`
+
+## Testing
+- `api/test_api.py`: Integration tests against live API (api.yuany3721.site)
+- Tests cover costs CRUD operations and type validation
+
+## Important Notes
+- **Port**: Backend runs on 7030, frontend dev server typically on 5173
+- **CORS**: Backend allows all origins (`["*"]`) - change for production
+- **Soft Deletes**: All entities use `is_deleted` flag; queries should filter it
+- **Cost Types**: 保养/维修/保险/停车/洗车/违章/过路费/其他
+- **Frontend Max Width**: Content constrained to 900px centered
diff --git a/api/.env.example b/api/.env.example
new file mode 100644
index 0000000..9128441
--- /dev/null
+++ b/api/.env.example
@@ -0,0 +1,9 @@
+# 数据库连接字符串
+DATABASE_URL=postgresql://username:password@localhost:5432/carcost
+
+# 调试模式
+debug=true
+
+# 应用配置（可选）
+TITLE=CarCost
+VERSION=1.0.0
diff --git a/api/.gitignore b/api/.gitignore
new file mode 100644
index 0000000..89d274c
--- /dev/null
+++ b/api/.gitignore
@@ -0,0 +1,48 @@
+# Python
+__pycache__/
+*.py[cod]
+*$py.class
+*.so
+.Python
+*.egg-info/
+dist/
+build/
+
+# Virtual Environment
+venv/
+env/
+ENV/
+.venv/
+
+# IDE
+.vscode/
+.idea/
+*.swp
+*.swo
+
+# Environment variables
+.env
+.env.local
+.env.*.local
+
+# Database
+*.db
+*.sqlite
+*.sqlite3
+
+# Logs
+*.log
+logs/
+
+# OS
+.DS_Store
+Thumbs.db
+
+# Testing
+.pytest_cache/
+.coverage
+htmlcov/
+
+# Temporary files
+*.tmp
+*.bak
diff --git a/api/README.md b/api/README.md
new file mode 100644
index 0000000..b6c79bd
--- /dev/null
+++ b/api/README.md
@@ -0,0 +1,68 @@
+# CarCost API
+
+车辆费用追踪后端 API，使用 FastAPI + SQLAlchemy + PostgreSQL 构建。
+
+## 项目结构
+
+```
+api/
+├── main.py              # FastAPI 入口
+├── config.py            # 配置管理
+├── database.py          # 数据库连接
+├── models.py            # SQLAlchemy 模型
+├── schemas.py           # Pydantic 数据模型
+├── requirements.txt     # 依赖
+├── routers/             # API 路由
+│   ├── vehicles.py      # 车辆管理
+│   ├── fuel_records.py  # 加油记录
+│   ├── costs.py         # 费用记录
+│   └── dashboard.py     # 仪表板
+└── .env                 # 环境变量（不提交）
+```
+
+## 快速开始
+
+### 1. 配置环境变量
+
+```bash
+cp .env.example .env
+# 编辑 .env 文件，设置 DATABASE_URL
+```
+
+### 2. 安装依赖
+
+```bash
+python -m venv venv
+source venv/bin/activate
+pip install -r requirements.txt
+```
+
+### 3. 启动服务
+
+```bash
+python main.py
+# 或
+uvicorn main:app --host 0.0.0.0 --port 7030 --reload
+```
+
+### 4. 访问文档
+
+- API 文档: http://localhost:7030/docs
+- 健康检查: http://localhost:7030/health
+
+## API 路由
+
+所有路由前缀为 `/carcost`:
+
+- `GET/POST  /carcost/vehicles/*` - 车辆管理
+- `GET/POST  /carcost/fuel-records/*` - 加油记录
+- `GET/POST  /carcost/costs/*` - 费用记录
+- `GET       /carcost/dashboard/*` - 仪表板数据
+
+## 技术栈
+
+- **FastAPI**: Web 框架
+- **SQLAlchemy 2.0**: ORM
+- **PostgreSQL**: 数据库
+- **Pydantic**: 数据验证
+- **python-dotenv**: 环境变量管理
diff --git a/api/config.py b/api/config.py
new file mode 100644
index 0000000..f0d1227
--- /dev/null
+++ b/api/config.py
@@ -0,0 +1,19 @@
+# config.py
+from pydantic_settings import BaseSettings
+import os
+from dotenv import load_dotenv
+
+
+# 加载环境变量
+load_dotenv()
+
+
+class Settings(BaseSettings):
+    DATABASE_URL: str = os.getenv("DATABASE_URL", "postgresql://postgres:password@localhost:5432/carcost")
+    TITLE: str = os.getenv("TITLE", "CarCost")
+    VERSION: str = os.getenv("VERSION", "1.0.0")
+    DEBUG: bool = os.getenv("DEBUG", "false").lower() == "true"
+
+
+# 创建全局配置实例
+settings = Settings()
diff --git a/api/database.py b/api/database.py
new file mode 100644
index 0000000..8f73c63
--- /dev/null
+++ b/api/database.py
@@ -0,0 +1,25 @@
+from sqlalchemy import create_engine
+from sqlalchemy.orm import sessionmaker, Session
+from config import settings
+
+# 创建数据库引擎
+engine = create_engine(
+    settings.DATABASE_URL,
+    echo=settings.DEBUG,
+    pool_pre_ping=True,
+    pool_size=5,
+    max_overflow=10,
+)
+
+# 创建会话工厂
+SessionLocal = sessionmaker(bind=engine)
+
+
+def get_session() -> Session:
+    """获取新的数据库会话
+    
+    使用示例:
+        with get_session() as session:
+            result = session.query(Model).all()
+    """
+    return SessionLocal()
diff --git a/api/main.py b/api/main.py
new file mode 100644
index 0000000..bba01b3
--- /dev/null
+++ b/api/main.py
@@ -0,0 +1,45 @@
+from fastapi import FastAPI
+from fastapi.middleware.cors import CORSMiddleware
+
+from config import settings
+from routers import vehicles_router, fuel_records_router, costs_router, dashboard_router
+
+# 创建 FastAPI 应用
+app = FastAPI(title=settings.TITLE, version=settings.VERSION, debug=settings.DEBUG)
+
+# 配置 CORS
+app.add_middleware(
+    CORSMiddleware,
+    allow_origins=["*"],  # 生产环境应该限制具体域名
+    allow_credentials=True,
+    allow_methods=["*"],
+    allow_headers=["*"],
+)
+
+# 注册路由 - 添加 /carcost 前缀
+app.include_router(vehicles_router, prefix="/carcost")
+app.include_router(fuel_records_router, prefix="/carcost")
+app.include_router(costs_router, prefix="/carcost")
+app.include_router(dashboard_router, prefix="/carcost")
+
+
+@app.get("/")
+def root():
+    """根路径"""
+    return {
+        "message": "Welcome to CarCost API",
+        "version": settings.VERSION,
+        "docs": "/docs",
+    }
+
+
+@app.get("/health")
+def health_check():
+    """健康检查"""
+    return {"status": "ok"}
+
+
+if __name__ == "__main__":
+    import uvicorn
+
+    uvicorn.run("main:app", host="0.0.0.0", port=7030, reload=settings.DEBUG)
diff --git a/api/models.py b/api/models.py
new file mode 100644
index 0000000..895c7c0
--- /dev/null
+++ b/api/models.py
@@ -0,0 +1,69 @@
+"""
+SQLAlchemy 数据库模型定义
+"""
+from sqlalchemy import Column, Integer, String, DateTime, Boolean, Text, Numeric, Date, ForeignKey
+from sqlalchemy.ext.declarative import declarative_base
+from sqlalchemy.orm import relationship
+from datetime import datetime
+
+# 定义基类
+Base = declarative_base()
+
+
+class Vehicle(Base):
+    """车辆表"""
+    __tablename__ = "vehicles"
+
+    id = Column(Integer, primary_key=True, autoincrement=True)
+    name = Column(String(50), nullable=False)
+    purchase_date = Column(Date, nullable=True)
+    initial_mileage = Column(Integer, default=0, nullable=False)
+    is_deleted = Column(Boolean, default=False)  # 软删除标记
+    created_at = Column(DateTime, default=datetime.now)
+    updated_at = Column(DateTime, default=datetime.now, onupdate=datetime.now)
+
+    # 关联关系
+    fuel_records = relationship("FuelRecord", back_populates="vehicle")
+    costs = relationship("Cost", back_populates="vehicle")
+
+
+class FuelRecord(Base):
+    """加油记录表"""
+    __tablename__ = "fuel_records"
+
+    id = Column(Integer, primary_key=True, autoincrement=True)
+    vehicle_id = Column(Integer, ForeignKey("vehicles.id"), nullable=False)
+    date = Column(Date, nullable=False)
+    mileage = Column(Integer, nullable=False)
+    fuel_amount = Column(Numeric(10, 2), nullable=False)
+    fuel_price = Column(Numeric(10, 2), nullable=True)
+    total_cost = Column(Numeric(10, 2), nullable=False)
+    is_full_tank = Column(Boolean, default=True)
+    notes = Column(Text, default="")
+    is_deleted = Column(Boolean, default=False)  # 软删除标记
+    created_at = Column(DateTime, default=datetime.now)
+    updated_at = Column(DateTime, default=datetime.now, onupdate=datetime.now)
+
+    # 关联关系
+    vehicle = relationship("Vehicle", back_populates="fuel_records")
+
+
+class Cost(Base):
+    """费用记录表"""
+    __tablename__ = "costs"
+
+    id = Column(Integer, primary_key=True, autoincrement=True)
+    vehicle_id = Column(Integer, ForeignKey("vehicles.id"), nullable=False)
+    date = Column(Date, nullable=False)
+    type = Column(String(20), nullable=False)  # 保养/维修/保险/停车/洗车/违章/过路费/其他
+    amount = Column(Numeric(10, 2), nullable=False)
+    mileage = Column(Integer, nullable=True)
+    notes = Column(Text, default="")
+    is_installment = Column(Boolean, default=False)  # 是否分期/分摊
+    installment_months = Column(Integer, default=12)  # 分摊月数
+    is_deleted = Column(Boolean, default=False)  # 软删除标记
+    created_at = Column(DateTime, default=datetime.now)
+    updated_at = Column(DateTime, default=datetime.now, onupdate=datetime.now)
+
+    # 关联关系
+    vehicle = relationship("Vehicle", back_populates="costs")
diff --git a/api/requirements.txt b/api/requirements.txt
new file mode 100644
index 0000000..c6a49a5
--- /dev/null
+++ b/api/requirements.txt
@@ -0,0 +1,8 @@
+fastapi==0.115.0
+uvicorn[standard]==0.32.0
+sqlalchemy==2.0.36
+psycopg2-binary==2.9.10
+pydantic==2.9.2
+pydantic-settings==2.6.1
+python-dotenv==1.0.1
+python-multipart==0.0.17
diff --git a/api/routers/__init__.py b/api/routers/__init__.py
new file mode 100644
index 0000000..961808a
--- /dev/null
+++ b/api/routers/__init__.py
@@ -0,0 +1,20 @@
+"""
+路由模块统一导出
+
+使用示例:
+    from routers import vehicles_router, fuel_records_router, costs_router, dashboard_router
+    
+    app.include_router(vehicles_router, prefix="/carcost")
+    app.include_router(fuel_records_router, prefix="/carcost")
+"""
+from .vehicles import router as vehicles_router
+from .fuel_records import router as fuel_records_router
+from .costs import router as costs_router
+from .dashboard import router as dashboard_router
+
+__all__ = [
+    "vehicles_router",
+    "fuel_records_router",
+    "costs_router",
+    "dashboard_router",
+]
diff --git a/api/routers/costs.py b/api/routers/costs.py
new file mode 100644
index 0000000..92d4fd6
--- /dev/null
+++ b/api/routers/costs.py
@@ -0,0 +1,154 @@
+from fastapi import APIRouter, HTTPException, Body
+from typing import Optional
+from decimal import Decimal
+from datetime import date as date_module
+
+from database import get_session
+from models import Cost, Vehicle
+from schemas import (
+    CostCreate,
+    CostUpdate,
+    CostDelete,
+    CostResponse,
+    COST_TYPES,
+)
+
+
+router = APIRouter(prefix="/costs", tags=["costs"])
+
+
+def _to_cost_response(cost: Cost) -> CostResponse:
+    """将 Cost 模型转换为 CostResponse"""
+    return CostResponse(
+        id=cost.id,
+        vehicle_id=cost.vehicle_id,
+        date=cost.date,
+        type=cost.type,
+        amount=float(cost.amount),
+        mileage=cost.mileage,
+        notes=cost.notes,
+        is_installment=cost.is_installment,
+        installment_months=cost.installment_months,
+        is_deleted=cost.is_deleted,
+        created_at=cost.created_at,
+        updated_at=cost.updated_at,
+    )
+
+
+@router.get("/list", response_model=list[CostResponse])
+def get_costs(
+    vehicle_id: Optional[int] = None, cost_type: Optional[str] = None, limit: int = 50
+):
+    """获取费用记录列表（排除已删除）"""
+    with get_session() as session:
+        query = session.query(Cost).filter(Cost.is_deleted == False)
+        if vehicle_id:
+            query = query.filter(Cost.vehicle_id == vehicle_id)
+        if cost_type:
+            query = query.filter(Cost.type == cost_type)
+
+        costs = query.order_by(Cost.date.desc()).limit(limit).all()
+        return [_to_cost_response(c) for c in costs]
+
+
+@router.post("/create", response_model=CostResponse)
+def create_cost(cost: CostCreate):
+    """添加费用记录"""
+    with get_session() as session:
+        # 验证车辆存在
+        vehicle = session.query(Vehicle).filter(Vehicle.id == cost.vehicle_id).first()
+        if not vehicle:
+            raise HTTPException(status_code=404, detail="Vehicle not found")
+
+        # 验证费用类型
+        if cost.type not in COST_TYPES:
+            raise HTTPException(
+                status_code=400,
+                detail=f"Invalid cost type. Must be one of: {', '.join(COST_TYPES)}",
+            )
+
+        db_cost = Cost(
+            vehicle_id=cost.vehicle_id,
+            date=cost.date,
+            type=cost.type,
+            amount=Decimal(str(cost.amount)),
+            mileage=cost.mileage,
+            notes=cost.notes or "",
+            is_installment=cost.is_installment or False,
+            installment_months=cost.installment_months or 12,
+        )
+        session.add(db_cost)
+        session.commit()
+        session.refresh(db_cost)
+
+        return _to_cost_response(db_cost)
+
+
+@router.post("/update")
+def update_cost(
+    id: int = Body(...),
+    type: Optional[str] = Body(None),
+    date: Optional[str] = Body(None),
+    amount: Optional[float] = Body(None),
+    mileage: Optional[int] = Body(None),
+    notes: Optional[str] = Body(None),
+    is_installment: Optional[bool] = Body(None),
+    installment_months: Optional[int] = Body(None),
+):
+    """更新费用记录"""
+    with get_session() as session:
+        cost = session.query(Cost).filter(Cost.id == id).first()
+        if not cost:
+            raise HTTPException(status_code=404, detail="Cost record not found")
+
+        # 验证费用类型
+        if type is not None:
+            if type not in COST_TYPES:
+                raise HTTPException(
+                    status_code=400,
+                    detail=f"Invalid cost type. Must be one of: {', '.join(COST_TYPES)}",
+                )
+            cost.type = type
+
+        # 处理日期转换
+        if date is not None:
+            cost.date = date_module.fromisoformat(date)
+
+        if amount is not None:
+            cost.amount = Decimal(str(amount))
+        if mileage is not None:
+            cost.mileage = mileage
+        if notes is not None:
+            cost.notes = notes or ""
+        if is_installment is not None:
+            cost.is_installment = is_installment
+        if installment_months is not None:
+            cost.installment_months = installment_months
+
+        session.commit()
+        session.refresh(cost)
+
+        return _to_cost_response(cost)
+
+
+@router.post("/delete")
+def delete_cost(cost: CostDelete):
+    """软删除费用记录"""
+    with get_session() as session:
+        db_cost = (
+            session.query(Cost)
+            .filter(Cost.id == cost.id, Cost.is_deleted == False)
+            .first()
+        )
+        if not db_cost:
+            raise HTTPException(status_code=404, detail="Cost record not found")
+
+        db_cost.is_deleted = True
+        session.commit()
+        return {"message": "Cost record deleted successfully"}
+
+
+@router.get("/types")
+def get_cost_types():
+    """获取费用类型列表"""
+    return {"types": COST_TYPES}
diff --git a/api/routers/dashboard.py b/api/routers/dashboard.py
new file mode 100644
index 0000000..a6ff74f
--- /dev/null
+++ b/api/routers/dashboard.py
@@ -0,0 +1,128 @@
+from fastapi import APIRouter, HTTPException
+from typing import Optional
+
+from database import get_session
+from models import Vehicle, FuelRecord
+from schemas import DashboardData, FuelRecordItem
+
+
+router = APIRouter(prefix="/dashboard", tags=["dashboard"])
+
+
+@router.get("/data", response_model=DashboardData)
+def get_dashboard(vehicle_id: int):
+    """获取仪表盘数据"""
+    with get_session() as session:
+        vehicle = (
+            session.query(Vehicle)
+            .filter(Vehicle.id == vehicle_id, Vehicle.is_deleted == False)
+            .first()
+        )
+        if not vehicle:
+            raise HTTPException(status_code=404, detail="Vehicle not found")
+
+        # 获取所有未删除的加油记录
+        fuel_records = (
+            session.query(FuelRecord)
+            .filter(FuelRecord.vehicle_id == vehicle_id, FuelRecord.is_deleted == False)
+            .order_by(FuelRecord.date.asc())
+            .all()
+        )
+
+        # 计算总里程
+        if fuel_records:
+            latest_mileage = max(r.mileage for r in fuel_records)
+            total_mileage = latest_mileage - vehicle.initial_mileage
+        else:
+            total_mileage = 0
+
+        # 计算总油费
+        total_fuel_cost = sum(float(r.total_cost) for r in fuel_records)
+
+        # 计算平均油耗（只算加满的记录）
+        total_fuel_amount = sum(
+            float(r.fuel_amount) for r in fuel_records if r.is_full_tank
+        )
+        avg_fuel_consumption = None
+        if total_mileage > 0 and total_fuel_amount > 0:
+            avg_fuel_consumption = round((total_fuel_amount / total_mileage) * 100, 2)
+
+        # 获取最近5条加油记录（带油耗计算，排除已删除）
+        recent_records = (
+            session.query(FuelRecord)
+            .filter(FuelRecord.vehicle_id == vehicle_id, FuelRecord.is_deleted == False)
+            .order_by(FuelRecord.date.desc(), FuelRecord.mileage.desc())
+            .limit(5)
+            .all()
+        )
+
+        recent_fuel_records = []
+        for record in recent_records:
+            # 计算单次油耗
+            fuel_consumption = None
+            if record.is_full_tank:
+                # 先找更早日期的记录
+                prev_record = (
+                    session.query(FuelRecord)
+                    .filter(
+                        FuelRecord.vehicle_id == vehicle_id,
+                        FuelRecord.date < record.date,
+                        FuelRecord.is_full_tank == True,
+                        FuelRecord.is_deleted == False,
+                    )
+                    .order_by(FuelRecord.date.desc(), FuelRecord.mileage.desc())
+                    .first()
+                )
+
+                # 如果没找到，找同一天更早的记录
+                if not prev_record:
+                    prev_record = (
+                        session.query(FuelRecord)
+                        .filter(
+                            FuelRecord.vehicle_id == vehicle_id,
+                            FuelRecord.date == record.date,
+                            FuelRecord.mileage < record.mileage,
+                            FuelRecord.is_full_tank == True,
+                            FuelRecord.is_deleted == False,
+                        )
+                        .order_by(FuelRecord.mileage.desc())
+                        .first()
+                    )
+
+                if prev_record:
+                    mileage_diff = record.mileage - prev_record.mileage
+                    if mileage_diff > 0:
+                        fuel_consumption = round(
+                            (float(record.fuel_amount) / mileage_diff) * 100, 2
+                        )
+
+            recent_fuel_records.append(
+                FuelRecordItem(
+                    id=record.id,
+                    date=record.date,
+                    mileage=record.mileage,
+                    fuel_amount=float(record.fuel_amount),
+                    total_cost=float(record.total_cost),
+                    fuel_consumption=fuel_consumption,
+                )
+            )
+
+        # 计算日均行程
+        avg_daily_km = None
+        if total_mileage > 0 and fuel_records:
+            first_date = fuel_records[0].date  # 第一次加油日期（已按日期升序排序）
+            last_date = fuel_records[-1].date  # 最后一次加油日期
+            days = (last_date - first_date).days
+            if days > 0:
+                avg_daily_km = round(total_mileage / days, 1)
+
+        return DashboardData(
+            vehicle_id=vehicle_id,
+            vehicle_name=vehicle.name,
+            purchase_date=vehicle.purchase_date,
+            total_mileage=total_mileage,
+            total_fuel_cost=round(total_fuel_cost, 2),
+            avg_fuel_consumption=avg_fuel_consumption,
+            avg_daily_km=avg_daily_km,
+            recent_fuel_records=recent_fuel_records,
+        )
diff --git a/api/routers/fuel_records.py b/api/routers/fuel_records.py
new file mode 100644
index 0000000..9b6a512
--- /dev/null
+++ b/api/routers/fuel_records.py
@@ -0,0 +1,221 @@
+from fastapi import APIRouter, HTTPException
+from typing import Optional
+from decimal import Decimal
+
+from database import get_session
+from models import FuelRecord, Vehicle
+from schemas import (
+    FuelRecordCreate,
+    FuelRecordUpdate,
+    FuelRecordDelete,
+    FuelRecordResponse,
+)
+
+
+router = APIRouter(prefix="/fuel-records", tags=["fuel_records"])
+
+
+def calculate_fuel_consumption(session, record: FuelRecord) -> Optional[float]:
+    """计算单次油耗
+
+    油耗计算逻辑：
+    1. 找到上一条加满油的记录
+    2. 计算两次加满之间的里程差
+    3. 计算两次加满之间的累计加油量（包括中间未加满的记录）
+    4. 油耗 = (累计加油量 / 里程差) * 100
+    """
+    if not record.is_full_tank:
+        return None
+
+    # 找到上一条加满油的记录（排除已删除）
+    prev_record = (
+        session.query(FuelRecord)
+        .filter(
+            FuelRecord.vehicle_id == record.vehicle_id,
+            FuelRecord.date < record.date,
+            FuelRecord.is_full_tank == True,
+            FuelRecord.is_deleted == False,
+        )
+        .order_by(FuelRecord.date.desc(), FuelRecord.mileage.desc())
+        .first()
+    )
+
+    # 如果同一天有更早的记录，也考虑进去
+    if not prev_record:
+        prev_record = (
+            session.query(FuelRecord)
+            .filter(
+                FuelRecord.vehicle_id == record.vehicle_id,
+                FuelRecord.date == record.date,
+                FuelRecord.mileage < record.mileage,
+                FuelRecord.is_full_tank == True,
+                FuelRecord.is_deleted == False,
+            )
+            .order_by(FuelRecord.mileage.desc())
+            .first()
+        )
+
+    if not prev_record:
+        return None
+
+    mileage_diff = record.mileage - prev_record.mileage
+    if mileage_diff <= 0:
+        return None
+
+    # 计算两次加满之间的累计加油量（包括中间未加满的记录）
+    # 从上一次加满之后（不包括）到当前这次（包括）的所有加油记录
+    intermediate_records = (
+        session.query(FuelRecord)
+        .filter(
+            FuelRecord.vehicle_id == record.vehicle_id,
+            FuelRecord.date >= prev_record.date,
+            FuelRecord.date <= record.date,
+            FuelRecord.mileage > prev_record.mileage,
+            FuelRecord.mileage <= record.mileage,
+            FuelRecord.is_deleted == False,
+        )
+        .all()
+    )
+
+    total_fuel = sum(float(r.fuel_amount) for r in intermediate_records)
+
+    fuel_consumption = (total_fuel / mileage_diff) * 100
+    return round(fuel_consumption, 2)
+
+
+def get_record_with_consumption(session, record: FuelRecord) -> FuelRecordResponse:
+    """获取记录并计算油耗"""
+    fuel_consumption = calculate_fuel_consumption(session, record)
+    return FuelRecordResponse(
+        id=record.id,
+        vehicle_id=record.vehicle_id,
+        date=record.date,
+        mileage=record.mileage,
+        fuel_amount=float(record.fuel_amount),
+        fuel_price=float(record.fuel_price) if record.fuel_price else None,
+        total_cost=float(record.total_cost),
+        is_full_tank=record.is_full_tank,
+        notes=record.notes,
+        fuel_consumption=fuel_consumption,
+        is_deleted=record.is_deleted,
+        created_at=record.created_at,
+        updated_at=record.updated_at,
+    )
+
+
+@router.get("/list", response_model=list[FuelRecordResponse])
+def get_fuel_records(vehicle_id: Optional[int] = None, limit: int = 50):
+    """获取加油记录列表（排除已删除）"""
+    with get_session() as session:
+        query = session.query(FuelRecord).filter(FuelRecord.is_deleted == False)
+        if vehicle_id:
+            query = query.filter(FuelRecord.vehicle_id == vehicle_id)
+
+        records = (
+            query.order_by(FuelRecord.date.desc(), FuelRecord.mileage.desc())
+            .limit(limit)
+            .all()
+        )
+        return [get_record_with_consumption(session, r) for r in records]
+
+
+@router.post("/create", response_model=FuelRecordResponse)
+def create_fuel_record(record: FuelRecordCreate):
+    """添加加油记录"""
+    with get_session() as session:
+        # 验证车辆存在
+        vehicle = session.query(Vehicle).filter(Vehicle.id == record.vehicle_id).first()
+        if not vehicle:
+            raise HTTPException(status_code=404, detail="Vehicle not found")
+
+        # 自动计算总价或单价
+        fuel_price = record.fuel_price
+        total_cost = record.total_cost
+
+        if fuel_price is None and total_cost is not None:
+            # 只有总价，计算单价
+            fuel_price = total_cost / record.fuel_amount
+        elif total_cost is None and fuel_price is not None:
+            # 只有单价，计算总价
+            total_cost = fuel_price * record.fuel_amount
+        elif total_cost is None and fuel_price is None:
+            raise HTTPException(
+                status_code=400,
+                detail="Either fuel_price or total_cost must be provided",
+            )
+        # 如果两者都有，使用传入的值（不重新计算，保留实付金额）
+
+        db_record = FuelRecord(
+            vehicle_id=record.vehicle_id,
+            date=record.date,
+            mileage=record.mileage,
+            fuel_amount=Decimal(str(record.fuel_amount)),
+            fuel_price=Decimal(str(fuel_price)) if fuel_price else None,
+            total_cost=Decimal(str(total_cost)),
+            is_full_tank=record.is_full_tank,
+            notes=record.notes or "",
+        )
+        session.add(db_record)
+        session.commit()
+        session.refresh(db_record)
+        return get_record_with_consumption(session, db_record)
+
+
+@router.post("/update", response_model=FuelRecordResponse)
+def update_fuel_record(record_update: FuelRecordUpdate):
+    """更新加油记录"""
+    with get_session() as session:
+        record = (
+            session.query(FuelRecord).filter(FuelRecord.id == record_update.id).first()
+        )
+        if not record:
+            raise HTTPException(status_code=404, detail="Fuel record not found")
+
+        # 更新字段
+        if record_update.date is not None:
+            record.date = record_update.date
+        if record_update.mileage is not None:
+            record.mileage = record_update.mileage
+        if record_update.fuel_amount is not None:
+            record.fuel_amount = Decimal(str(record_update.fuel_amount))
+        if record_update.is_full_tank is not None:
+            record.is_full_tank = record_update.is_full_tank
+        if record_update.notes is not None:
+            record.notes = record_update.notes
+
+        # 处理价格和总价
+        fuel_amount = float(record.fuel_amount)
+        if (
+            record_update.fuel_price is not None
+            and record_update.total_cost is not None
+        ):
+            record.fuel_price = Decimal(str(record_update.fuel_price))
+            record.total_cost = Decimal(str(record_update.total_cost))
+        elif record_update.fuel_price is not None:
+            record.fuel_price = Decimal(str(record_update.fuel_price))
+            record.total_cost = Decimal(str(record_update.fuel_price * fuel_amount))
+        elif record_update.total_cost is not None:
+            record.total_cost = Decimal(str(record_update.total_cost))
+            if fuel_amount > 0:
+                record.fuel_price = Decimal(str(record_update.total_cost / fuel_amount))
+
+        session.commit()
+        session.refresh(record)
+        return get_record_with_consumption(session, record)
+
+
+@router.post("/delete")
+def delete_fuel_record(record: FuelRecordDelete):
+    """软删除加油记录"""
+    with get_session() as session:
+        db_record = (
+            session.query(FuelRecord)
+            .filter(FuelRecord.id == record.id, FuelRecord.is_deleted == False)
+            .first()
+        )
+        if not db_record:
+            raise HTTPException(status_code=404, detail="Fuel record not found")
+
+        db_record.is_deleted = True
+        session.commit()
+        return {"message": "Fuel record deleted successfully"}
diff --git a/api/routers/vehicles.py b/api/routers/vehicles.py
new file mode 100644
index 0000000..a9a9ecc
--- /dev/null
+++ b/api/routers/vehicles.py
@@ -0,0 +1,127 @@
+from fastapi import APIRouter, HTTPException
+from typing import Optional
+from decimal import Decimal
+
+from database import get_session
+from models import Vehicle, FuelRecord
+from schemas import (
+    VehicleCreate,
+    VehicleUpdate,
+    VehicleDelete,
+    VehicleResponse,
+    VehicleStats,
+)
+
+
+router = APIRouter(prefix="/vehicles", tags=["vehicles"])
+
+
+@router.get("/list", response_model=list[VehicleResponse])
+def get_vehicles():
+    """获取所有车辆列表（排除已删除）"""
+    with get_session() as session:
+        vehicles = (
+            session.query(Vehicle)
+            .filter(Vehicle.is_deleted == False)
+            .order_by(Vehicle.created_at.desc())
+            .all()
+        )
+        return vehicles
+
+
+@router.post("/create", response_model=VehicleResponse)
+def create_vehicle(vehicle: VehicleCreate):
+    """添加新车辆"""
+    with get_session() as session:
+        db_vehicle = Vehicle(
+            name=vehicle.name,
+            purchase_date=vehicle.purchase_date,
+            initial_mileage=vehicle.initial_mileage,
+        )
+        session.add(db_vehicle)
+        session.commit()
+        session.refresh(db_vehicle)
+        return db_vehicle
+
+
+@router.post("/update", response_model=VehicleResponse)
+def update_vehicle(vehicle: VehicleUpdate):
+    """更新车辆信息"""
+    with get_session() as session:
+        db_vehicle = session.query(Vehicle).filter(Vehicle.id == vehicle.id).first()
+        if not db_vehicle:
+            raise HTTPException(status_code=404, detail="Vehicle not found")
+
+        if vehicle.name is not None:
+            db_vehicle.name = vehicle.name
+        if vehicle.purchase_date is not None:
+            db_vehicle.purchase_date = vehicle.purchase_date
+        if vehicle.initial_mileage is not None:
+            db_vehicle.initial_mileage = vehicle.initial_mileage
+
+        session.commit()
+        session.refresh(db_vehicle)
+        return db_vehicle
+
+
+@router.post("/delete")
+def delete_vehicle(vehicle: VehicleDelete):
+    """软删除车辆"""
+    with get_session() as session:
+        db_vehicle = (
+            session.query(Vehicle)
+            .filter(Vehicle.id == vehicle.id, Vehicle.is_deleted == False)
+            .first()
+        )
+        if not db_vehicle:
+            raise HTTPException(status_code=404, detail="Vehicle not found")
+
+        db_vehicle.is_deleted = True
+        session.commit()
+        return {"message": "Vehicle deleted successfully"}
+
+
+@router.get("/stats", response_model=VehicleStats)
+def get_vehicle_stats(vehicle_id: int):
+    """获取车辆统计信息"""
+    with get_session() as session:
+        vehicle = (
+            session.query(Vehicle)
+            .filter(Vehicle.id == vehicle_id, Vehicle.is_deleted == False)
+            .first()
+        )
+        if not vehicle:
+            raise HTTPException(status_code=404, detail="Vehicle not found")
+
+        # 获取所有未删除的加油记录
+        fuel_records = (
+            session.query(FuelRecord)
+            .filter(FuelRecord.vehicle_id == vehicle_id, FuelRecord.is_deleted == False)
+            .order_by(FuelRecord.date.asc())
+            .all()
+        )
+
+        # 计算总里程
+        if fuel_records:
+            latest_mileage = max(r.mileage for r in fuel_records)
+            total_mileage = latest_mileage - vehicle.initial_mileage
+        else:
+            total_mileage = 0
+
+        # 计算总油费和总加油量（只算加满的记录）
+        total_fuel_cost = sum(float(r.total_cost) for r in fuel_records)
+        total_fuel_amount = sum(
+            float(r.fuel_amount) for r in fuel_records if r.is_full_tank
+        )
+
+        # 计算平均油耗
+        avg_fuel_consumption = None
+        if total_mileage > 0 and total_fuel_amount > 0:
+            avg_fuel_consumption = round((total_fuel_amount / total_mileage) * 100, 2)
+
+        return VehicleStats(
+            total_mileage=total_mileage,
+            total_fuel_cost=round(total_fuel_cost, 2),
+            total_fuel_amount=round(total_fuel_amount, 2),
+            avg_fuel_consumption=avg_fuel_consumption,
+        )
diff --git a/api/schemas.py b/api/schemas.py
new file mode 100644
index 0000000..9cbd4d7
--- /dev/null
+++ b/api/schemas.py
@@ -0,0 +1,259 @@
+"""
+统一的 Pydantic 数据模型
+"""
+
+from pydantic import BaseModel, field_validator, ConfigDict
+from typing import Optional, List, Union
+from datetime import date, datetime
+
+
+# ==================== 车辆相关模型 ====================
+
+
+class VehicleBase(BaseModel):
+    """车辆基础模型"""
+
+    name: str
+    purchase_date: Optional[date] = None
+    initial_mileage: int = 0
+
+
+class VehicleCreate(VehicleBase):
+    """创建车辆请求模型"""
+
+    pass
+
+
+class VehicleUpdate(BaseModel):
+    """更新车辆请求模型"""
+
+    id: int
+    name: Optional[str] = None
+    purchase_date: Optional[date] = None
+    initial_mileage: Optional[int] = None
+
+
+class VehicleDelete(BaseModel):
+    """删除车辆请求模型"""
+
+    id: int
+
+
+class VehicleResponse(VehicleBase):
+    """车辆响应模型"""
+
+    id: int
+    is_deleted: bool = False
+    created_at: Optional[datetime] = None
+    updated_at: Optional[datetime] = None
+
+    class Config:
+        from_attributes = True
+
+
+class VehicleStats(BaseModel):
+    """车辆统计信息"""
+
+    total_mileage: int
+    total_fuel_cost: float
+    total_fuel_amount: float
+    avg_fuel_consumption: Optional[float]
+
+
+# ==================== 加油记录相关模型 ====================
+
+
+class FuelRecordBase(BaseModel):
+    """加油记录基础模型"""
+
+    vehicle_id: int
+    date: date
+    mileage: int
+    fuel_amount: float
+    fuel_price: Optional[float] = None
+    total_cost: Optional[float] = None
+    is_full_tank: bool = True
+    notes: Optional[str] = ""
+
+
+class FuelRecordCreate(FuelRecordBase):
+    """创建加油记录请求模型"""
+
+    @field_validator("total_cost", "fuel_price", mode="before")
+    @classmethod
+    def validate_costs(cls, v):
+        if v is not None:
+            return round(v, 2)
+        return v
+
+
+class FuelRecordUpdate(BaseModel):
+    """更新加油记录请求模型"""
+
+    model_config = ConfigDict(arbitrary_types_allowed=True)
+
+    id: int
+    date: Union[date, str, None] = None
+    mileage: Optional[int] = None
+    fuel_amount: Optional[float] = None
+    fuel_price: Optional[float] = None
+    total_cost: Optional[float] = None
+    is_full_tank: Optional[bool] = None
+    notes: Optional[str] = None
+
+    @field_validator("date", mode="before")
+    @classmethod
+    def parse_date(cls, v):
+        if v is None:
+            return None
+        if isinstance(v, date):
+            return v
+        if isinstance(v, str):
+            return date.fromisoformat(v)
+        raise ValueError("Invalid date format")
+
+
+class FuelRecordDelete(BaseModel):
+    """删除加油记录请求模型"""
+
+    id: int
+
+
+class FuelRecordResponse(BaseModel):
+    """加油记录响应模型"""
+
+    id: int
+    vehicle_id: int
+    date: date
+    mileage: int
+    fuel_amount: float
+    fuel_price: Optional[float]
+    total_cost: float
+    is_full_tank: bool
+    notes: str
+    fuel_consumption: Optional[float] = None  # 单次油耗，计算得出
+    is_deleted: bool = False
+    created_at: Optional[datetime] = None
+    updated_at: Optional[datetime] = None
+
+    class Config:
+        from_attributes = True
+
+
+# ==================== 费用记录相关模型 ====================
+
+# 费用类型枚举
+COST_TYPES = ["保养", "维修", "保险", "停车", "过路费", "洗车", "违章", "其他"]
+
+
+class CostBase(BaseModel):
+    """费用记录基础模型"""
+
+    vehicle_id: int
+    date: date
+    type: str
+    amount: float
+    mileage: Optional[int] = None
+    notes: Optional[str] = ""
+    is_installment: Optional[bool] = False
+    installment_months: Optional[int] = 12
+
+
+class CostCreate(CostBase):
+    """创建费用记录请求模型"""
+
+    pass
+
+
+class CostUpdate(BaseModel):
+    """更新费用记录请求模型"""
+
+    model_config = ConfigDict(arbitrary_types_allowed=True)
+
+    id: int
+    date: Union[date, str, None] = None
+    type: Optional[str] = None
+    amount: Optional[float] = None
+    mileage: Optional[int] = None
+    notes: Optional[str] = None
+    is_installment: Optional[bool] = None
+    installment_months: Optional[int] = None
+
+    @field_validator("date", mode="before")
+    @classmethod
+    def parse_date(cls, v):
+        if v is None:
+            return None
+        if isinstance(v, date):
+            return v
+        if isinstance(v, str):
+            return date.fromisoformat(v)
+        raise ValueError("Invalid date format")
+
+
+class CostDelete(BaseModel):
+    """删除费用记录请求模型"""
+
+    id: int
+
+
+class CostResponse(BaseModel):
+    """费用记录响应模型"""
+
+    id: int
+    vehicle_id: int
+    date: date
+    type: str
+    amount: float
+    mileage: Optional[int]
+    notes: str
+    is_installment: bool
+    installment_months: int
+    is_deleted: bool = False
+    created_at: Optional[datetime] = None
+    updated_at: Optional[datetime] = None
+
+    class Config:
+        from_attributes = True
+
+
+# ==================== 仪表板相关模型 ====================
+
+
+class FuelRecordItem(BaseModel):
+    """仪表板中使用的加油记录项"""
+
+    id: int
+    date: date
+    mileage: int
+    fuel_amount: float
+    total_cost: float
+    fuel_consumption: Optional[float]
+
+
+class DashboardData(BaseModel):
+    """仪表板数据响应"""
+
+    vehicle_id: int
+    vehicle_name: str
+    purchase_date: Optional[date]
+    total_mileage: int
+    total_fuel_cost: float
+    avg_fuel_consumption: Optional[float]
+    avg_daily_km: Optional[float]
+    recent_fuel_records: List[FuelRecordItem]
+
+
+# ==================== 通用响应模型 ====================
+
+
+class MessageResponse(BaseModel):
+    """通用消息响应"""
+
+    message: str
+
+
+class CostTypesResponse(BaseModel):
+    """费用类型列表响应"""
+
+    types: List[str]
diff --git a/web/.gitignore b/web/.gitignore
new file mode 100644
index 0000000..a547bf3
--- /dev/null
+++ b/web/.gitignore
@@ -0,0 +1,24 @@
+# Logs
+logs
+*.log
+npm-debug.log*
+yarn-debug.log*
+yarn-error.log*
+pnpm-debug.log*
+lerna-debug.log*
+
+node_modules
+dist
+dist-ssr
+*.local
+
+# Editor directories and files
+.vscode/*
+!.vscode/extensions.json
+.idea
+.DS_Store
+*.suo
+*.ntvs*
+*.njsproj
+*.sln
+*.sw?
diff --git a/web/.vscode/extensions.json b/web/.vscode/extensions.json
new file mode 100644
index 0000000..a7cea0b
--- /dev/null
+++ b/web/.vscode/extensions.json
@@ -0,0 +1,3 @@
+{
+  "recommendations": ["Vue.volar"]
+}
diff --git a/web/README.md b/web/README.md
new file mode 100644
index 0000000..1511959
--- /dev/null
+++ b/web/README.md
@@ -0,0 +1,5 @@
+# Vue 3 + Vite
+
+This template should help get you started developing with Vue 3 in Vite. The template uses Vue 3 `<script setup>` SFCs, check out the [script setup docs](https://v3.vuejs.org/api/sfc-script-setup.html#sfc-script-setup) to learn more.
+
+Learn more about IDE Support for Vue in the [Vue Docs Scaling up Guide](https://vuejs.org/guide/scaling-up/tooling.html#ide-support).
diff --git a/web/index.html b/web/index.html
new file mode 100644
index 0000000..2164e3f
--- /dev/null
+++ b/web/index.html
@@ -0,0 +1,13 @@
+<!doctype html>
+<html lang="en">
+  <head>
+    <meta charset="UTF-8" />
+    <link rel="icon" type="image/svg+xml" href="/favicon.svg" />
+    <meta name="viewport" content="width=device-width, initial-scale=1.0" />
+    <title>carcost</title>
+  </head>
+  <body>
+    <div id="app"></div>
+    <script type="module" src="/src/main.js"></script>
+  </body>
+</html>
diff --git a/web/package-lock.json b/web/package-lock.json
new file mode 100644
index 0000000..65897c2
--- /dev/null
+++ b/web/package-lock.json
@@ -0,0 +1,1619 @@
+{
+  "name": "carcost",
+  "version": "0.0.0",
+  "lockfileVersion": 3,
+  "requires": true,
+  "packages": {
+    "": {
+      "name": "carcost",
+      "version": "0.0.0",
+      "dependencies": {
+        "axios": "^1.14.0",
+        "echarts": "^6.0.0",
+        "element-plus": "^2.13.6",
+        "vue": "^3.5.32",
+        "vue-echarts": "^8.0.1"
+      },
+      "devDependencies": {
+        "@vitejs/plugin-vue": "^6.0.5",
+        "vite": "^8.0.4"
+      }
+    },
+    "node_modules/@babel/helper-string-parser": {
+      "version": "7.27.1",
+      "resolved": "https://registry.npmmirror.com/@babel/helper-string-parser/-/helper-string-parser-7.27.1.tgz",
+      "integrity": "sha512-qMlSxKbpRlAridDExk92nSobyDdpPijUq2DW6oDnUqd0iOGxmQjyqhMIihI9+zv4LPyZdRje2cavWPbCbWm3eA==",
+      "license": "MIT",
+      "engines": {
+        "node": ">=6.9.0"
+      }
+    },
+    "node_modules/@babel/helper-validator-identifier": {
+      "version": "7.28.5",
+      "resolved": "https://registry.npmmirror.com/@babel/helper-validator-identifier/-/helper-validator-identifier-7.28.5.tgz",
+      "integrity": "sha512-qSs4ifwzKJSV39ucNjsvc6WVHs6b7S03sOh2OcHF9UHfVPqWWALUsNUVzhSBiItjRZoLHx7nIarVjqKVusUZ1Q==",
+      "license": "MIT",
+      "engines": {
+        "node": ">=6.9.0"
+      }
+    },
+    "node_modules/@babel/parser": {
+      "version": "7.29.2",
+      "resolved": "https://registry.npmmirror.com/@babel/parser/-/parser-7.29.2.tgz",
+      "integrity": "sha512-4GgRzy/+fsBa72/RZVJmGKPmZu9Byn8o4MoLpmNe1m8ZfYnz5emHLQz3U4gLud6Zwl0RZIcgiLD7Uq7ySFuDLA==",
+      "license": "MIT",
+      "dependencies": {
+        "@babel/types": "^7.29.0"
+      },
+      "bin": {
+        "parser": "bin/babel-parser.js"
+      },
+      "engines": {
+        "node": ">=6.0.0"
+      }
+    },
+    "node_modules/@babel/types": {
+      "version": "7.29.0",
+      "resolved": "https://registry.npmmirror.com/@babel/types/-/types-7.29.0.tgz",
+      "integrity": "sha512-LwdZHpScM4Qz8Xw2iKSzS+cfglZzJGvofQICy7W7v4caru4EaAmyUuO6BGrbyQ2mYV11W0U8j5mBhd14dd3B0A==",
+      "license": "MIT",
+      "dependencies": {
+        "@babel/helper-string-parser": "^7.27.1",
+        "@babel/helper-validator-identifier": "^7.28.5"
+      },
+      "engines": {
+        "node": ">=6.9.0"
+      }
+    },
+    "node_modules/@ctrl/tinycolor": {
+      "version": "4.2.0",
+      "resolved": "https://registry.npmmirror.com/@ctrl/tinycolor/-/tinycolor-4.2.0.tgz",
+      "integrity": "sha512-kzyuwOAQnXJNLS9PSyrk0CWk35nWJW/zl/6KvnTBMFK65gm7U1/Z5BqjxeapjZCIhQcM/DsrEmcbRwDyXyXK4A==",
+      "license": "MIT",
+      "engines": {
+        "node": ">=14"
+      }
+    },
+    "node_modules/@element-plus/icons-vue": {
+      "version": "2.3.2",
+      "resolved": "https://registry.npmmirror.com/@element-plus/icons-vue/-/icons-vue-2.3.2.tgz",
+      "integrity": "sha512-OzIuTaIfC8QXEPmJvB4Y4kw34rSXdCJzxcD1kFStBvr8bK6X1zQAYDo0CNMjojnfTqRQCJ0I7prlErcoRiET2A==",
+      "license": "MIT",
+      "peerDependencies": {
+        "vue": "^3.2.0"
+      }
+    },
+    "node_modules/@emnapi/core": {
+      "version": "1.9.1",
+      "resolved": "https://registry.npmmirror.com/@emnapi/core/-/core-1.9.1.tgz",
+      "integrity": "sha512-mukuNALVsoix/w1BJwFzwXBN/dHeejQtuVzcDsfOEsdpCumXb/E9j8w11h5S54tT1xhifGfbbSm/ICrObRb3KA==",
+      "dev": true,
+      "license": "MIT",
+      "optional": true,
+      "dependencies": {
+        "@emnapi/wasi-threads": "1.2.0",
+        "tslib": "^2.4.0"
+      }
+    },
+    "node_modules/@emnapi/runtime": {
+      "version": "1.9.1",
+      "resolved": "https://registry.npmmirror.com/@emnapi/runtime/-/runtime-1.9.1.tgz",
+      "integrity": "sha512-VYi5+ZVLhpgK4hQ0TAjiQiZ6ol0oe4mBx7mVv7IflsiEp0OWoVsp/+f9Vc1hOhE0TtkORVrI1GvzyreqpgWtkA==",
+      "dev": true,
+      "license": "MIT",
+      "optional": true,
+      "dependencies": {
+        "tslib": "^2.4.0"
+      }
+    },
+    "node_modules/@emnapi/wasi-threads": {
+      "version": "1.2.0",
+      "resolved": "https://registry.npmmirror.com/@emnapi/wasi-threads/-/wasi-threads-1.2.0.tgz",
+      "integrity": "sha512-N10dEJNSsUx41Z6pZsXU8FjPjpBEplgH24sfkmITrBED1/U2Esum9F3lfLrMjKHHjmi557zQn7kR9R+XWXu5Rg==",
+      "dev": true,
+      "license": "MIT",
+      "optional": true,
+      "dependencies": {
+        "tslib": "^2.4.0"
+      }
+    },
+    "node_modules/@floating-ui/core": {
+      "version": "1.7.5",
+      "resolved": "https://registry.npmmirror.com/@floating-ui/core/-/core-1.7.5.tgz",
+      "integrity": "sha512-1Ih4WTWyw0+lKyFMcBHGbb5U5FtuHJuujoyyr5zTaWS5EYMeT6Jb2AuDeftsCsEuchO+mM2ij5+q9crhydzLhQ==",
+      "license": "MIT",
+      "dependencies": {
+        "@floating-ui/utils": "^0.2.11"
+      }
+    },
+    "node_modules/@floating-ui/dom": {
+      "version": "1.7.6",
+      "resolved": "https://registry.npmmirror.com/@floating-ui/dom/-/dom-1.7.6.tgz",
+      "integrity": "sha512-9gZSAI5XM36880PPMm//9dfiEngYoC6Am2izES1FF406YFsjvyBMmeJ2g4SAju3xWwtuynNRFL2s9hgxpLI5SQ==",
+      "license": "MIT",
+      "dependencies": {
+        "@floating-ui/core": "^1.7.5",
+        "@floating-ui/utils": "^0.2.11"
+      }
+    },
+    "node_modules/@floating-ui/utils": {
+      "version": "0.2.11",
+      "resolved": "https://registry.npmmirror.com/@floating-ui/utils/-/utils-0.2.11.tgz",
+      "integrity": "sha512-RiB/yIh78pcIxl6lLMG0CgBXAZ2Y0eVHqMPYugu+9U0AeT6YBeiJpf7lbdJNIugFP5SIjwNRgo4DhR1Qxi26Gg==",
+      "license": "MIT"
+    },
+    "node_modules/@jridgewell/sourcemap-codec": {
+      "version": "1.5.5",
+      "resolved": "https://registry.npmmirror.com/@jridgewell/sourcemap-codec/-/sourcemap-codec-1.5.5.tgz",
+      "integrity": "sha512-cYQ9310grqxueWbl+WuIUIaiUaDcj7WOq5fVhEljNVgRfOUhY9fy2zTvfoqWsnebh8Sl70VScFbICvJnLKB0Og==",
+      "license": "MIT"
+    },
+    "node_modules/@napi-rs/wasm-runtime": {
+      "version": "1.1.2",
+      "resolved": "https://registry.npmmirror.com/@napi-rs/wasm-runtime/-/wasm-runtime-1.1.2.tgz",
+      "integrity": "sha512-sNXv5oLJ7ob93xkZ1XnxisYhGYXfaG9f65/ZgYuAu3qt7b3NadcOEhLvx28hv31PgX8SZJRYrAIPQilQmFpLVw==",
+      "dev": true,
+      "license": "MIT",
+      "optional": true,
+      "dependencies": {
+        "@tybys/wasm-util": "^0.10.1"
+      },
+      "funding": {
+        "type": "github",
+        "url": "https://github.com/sponsors/Brooooooklyn"
+      },
+      "peerDependencies": {
+        "@emnapi/core": "^1.7.1",
+        "@emnapi/runtime": "^1.7.1"
+      }
+    },
+    "node_modules/@oxc-project/types": {
+      "version": "0.123.0",
+      "resolved": "https://registry.npmmirror.com/@oxc-project/types/-/types-0.123.0.tgz",
+      "integrity": "sha512-YtECP/y8Mj1lSHiUWGSRzy/C6teUKlS87dEfuVKT09LgQbUsBW1rNg+MiJ4buGu3yuADV60gbIvo9/HplA56Ew==",
+      "dev": true,
+      "license": "MIT",
+      "funding": {
+        "url": "https://github.com/sponsors/Boshen"
+      }
+    },
+    "node_modules/@popperjs/core": {
+      "name": "@sxzz/popperjs-es",
+      "version": "2.11.8",
+      "resolved": "https://registry.npmmirror.com/@sxzz/popperjs-es/-/popperjs-es-2.11.8.tgz",
+      "integrity": "sha512-wOwESXvvED3S8xBmcPWHs2dUuzrE4XiZeFu7e1hROIJkm02a49N120pmOXxY33sBb6hArItm5W5tcg1cBtV+HQ==",
+      "license": "MIT",
+      "funding": {
+        "type": "opencollective",
+        "url": "https://opencollective.com/popperjs"
+      }
+    },
+    "node_modules/@rolldown/binding-android-arm64": {
+      "version": "1.0.0-rc.13",
+      "resolved": "https://registry.npmmirror.com/@rolldown/binding-android-arm64/-/binding-android-arm64-1.0.0-rc.13.tgz",
+      "integrity": "sha512-5ZiiecKH2DXAVJTNN13gNMUcCDg4Jy8ZjbXEsPnqa248wgOVeYRX0iqXXD5Jz4bI9BFHgKsI2qmyJynstbmr+g==",
+      "cpu": [
+        "arm64"
+      ],
+      "dev": true,
+      "license": "MIT",
+      "optional": true,
+      "os": [
+        "android"
+      ],
+      "engines": {
+        "node": "^20.19.0 || >=22.12.0"
+      }
+    },
+    "node_modules/@rolldown/binding-darwin-arm64": {
+      "version": "1.0.0-rc.13",
+      "resolved": "https://registry.npmmirror.com/@rolldown/binding-darwin-arm64/-/binding-darwin-arm64-1.0.0-rc.13.tgz",
+      "integrity": "sha512-tz/v/8G77seu8zAB3A5sK3UFoOl06zcshEzhUO62sAEtrEuW/H1CcyoupOrD+NbQJytYgA4CppXPzlrmp4JZKA==",
+      "cpu": [
+        "arm64"
+      ],
+      "dev": true,
+      "license": "MIT",
+      "optional": true,
+      "os": [
+        "darwin"
+      ],
+      "engines": {
+        "node": "^20.19.0 || >=22.12.0"
+      }
+    },
+    "node_modules/@rolldown/binding-darwin-x64": {
+      "version": "1.0.0-rc.13",
+      "resolved": "https://registry.npmmirror.com/@rolldown/binding-darwin-x64/-/binding-darwin-x64-1.0.0-rc.13.tgz",
+      "integrity": "sha512-8DakphqOz8JrMYWTJmWA+vDJxut6LijZ8Xcdc4flOlAhU7PNVwo2MaWBF9iXjJAPo5rC/IxEFZDhJ3GC7NHvug==",
+      "cpu": [
+        "x64"
+      ],
+      "dev": true,
+      "license": "MIT",
+      "optional": true,
+      "os": [
+        "darwin"
+      ],
+      "engines": {
+        "node": "^20.19.0 || >=22.12.0"
+      }
+    },
+    "node_modules/@rolldown/binding-freebsd-x64": {
+      "version": "1.0.0-rc.13",
+      "resolved": "https://registry.npmmirror.com/@rolldown/binding-freebsd-x64/-/binding-freebsd-x64-1.0.0-rc.13.tgz",
+      "integrity": "sha512-4wBQFfjDuXYN/SVI8inBF3Aa+isq40rc6VMFbk5jcpolUBTe5cYnMsHZ51nFWsx3PVyyNN3vgoESki0Hmr/4BA==",
+      "cpu": [
+        "x64"
+      ],
+      "dev": true,
+      "license": "MIT",
+      "optional": true,
+      "os": [
+        "freebsd"
+      ],
+      "engines": {
+        "node": "^20.19.0 || >=22.12.0"
+      }
+    },
+    "node_modules/@rolldown/binding-linux-arm-gnueabihf": {
+      "version": "1.0.0-rc.13",
+      "resolved": "https://registry.npmmirror.com/@rolldown/binding-linux-arm-gnueabihf/-/binding-linux-arm-gnueabihf-1.0.0-rc.13.tgz",
+      "integrity": "sha512-JW/e4yPIXLms+jmnbwwy5LA/LxVwZUWLN8xug+V200wzaVi5TEGIWQlh8o91gWYFxW609euI98OCCemmWGuPrw==",
+      "cpu": [
+        "arm"
+      ],
+      "dev": true,
+      "license": "MIT",
+      "optional": true,
+      "os": [
+        "linux"
+      ],
+      "engines": {
+        "node": "^20.19.0 || >=22.12.0"
+      }
+    },
+    "node_modules/@rolldown/binding-linux-arm64-gnu": {
+      "version": "1.0.0-rc.13",
+      "resolved": "https://registry.npmmirror.com/@rolldown/binding-linux-arm64-gnu/-/binding-linux-arm64-gnu-1.0.0-rc.13.tgz",
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+      "cpu": [
+        "arm64"
+      ],
+      "dev": true,
+      "license": "MIT",
+      "optional": true,
+      "os": [
+        "linux"
+      ],
+      "engines": {
+        "node": "^20.19.0 || >=22.12.0"
+      }
+    },
+    "node_modules/@rolldown/binding-linux-arm64-musl": {
+      "version": "1.0.0-rc.13",
+      "resolved": "https://registry.npmmirror.com/@rolldown/binding-linux-arm64-musl/-/binding-linux-arm64-musl-1.0.0-rc.13.tgz",
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+        "arm64"
+      ],
+      "dev": true,
+      "license": "MIT",
+      "optional": true,
+      "os": [
+        "linux"
+      ],
+      "engines": {
+        "node": "^20.19.0 || >=22.12.0"
+      }
+    },
+    "node_modules/@rolldown/binding-linux-ppc64-gnu": {
+      "version": "1.0.0-rc.13",
+      "resolved": "https://registry.npmmirror.com/@rolldown/binding-linux-ppc64-gnu/-/binding-linux-ppc64-gnu-1.0.0-rc.13.tgz",
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+      "cpu": [
+        "ppc64"
+      ],
+      "dev": true,
+      "license": "MIT",
+      "optional": true,
+      "os": [
+        "linux"
+      ],
+      "engines": {
+        "node": "^20.19.0 || >=22.12.0"
+      }
+    },
+    "node_modules/@rolldown/binding-linux-s390x-gnu": {
+      "version": "1.0.0-rc.13",
+      "resolved": "https://registry.npmmirror.com/@rolldown/binding-linux-s390x-gnu/-/binding-linux-s390x-gnu-1.0.0-rc.13.tgz",
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+      "cpu": [
+        "s390x"
+      ],
+      "dev": true,
+      "license": "MIT",
+      "optional": true,
+      "os": [
+        "linux"
+      ],
+      "engines": {
+        "node": "^20.19.0 || >=22.12.0"
+      }
+    },
+    "node_modules/@rolldown/binding-linux-x64-gnu": {
+      "version": "1.0.0-rc.13",
+      "resolved": "https://registry.npmmirror.com/@rolldown/binding-linux-x64-gnu/-/binding-linux-x64-gnu-1.0.0-rc.13.tgz",
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+      "cpu": [
+        "x64"
+      ],
+      "dev": true,
+      "license": "MIT",
+      "optional": true,
+      "os": [
+        "linux"
+      ],
+      "engines": {
+        "node": "^20.19.0 || >=22.12.0"
+      }
+    },
+    "node_modules/@rolldown/binding-linux-x64-musl": {
+      "version": "1.0.0-rc.13",
+      "resolved": "https://registry.npmmirror.com/@rolldown/binding-linux-x64-musl/-/binding-linux-x64-musl-1.0.0-rc.13.tgz",
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+      "os": [
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+      "engines": {
+        "node": "^20.19.0 || >=22.12.0"
+      }
+    },
+    "node_modules/@rolldown/binding-openharmony-arm64": {
+      "version": "1.0.0-rc.13",
+      "resolved": "https://registry.npmmirror.com/@rolldown/binding-openharmony-arm64/-/binding-openharmony-arm64-1.0.0-rc.13.tgz",
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+        "openharmony"
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+      }
+    },
+    "node_modules/@rolldown/binding-wasm32-wasi": {
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+      "resolved": "https://registry.npmmirror.com/@rolldown/binding-wasm32-wasi/-/binding-wasm32-wasi-1.0.0-rc.13.tgz",
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+        "wasm32"
+      ],
+      "dev": true,
+      "license": "MIT",
+      "optional": true,
+      "dependencies": {
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+        "@napi-rs/wasm-runtime": "^1.1.2"
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+      "engines": {
+        "node": ">=14.0.0"
+      }
+    },
+    "node_modules/@rolldown/binding-win32-arm64-msvc": {
+      "version": "1.0.0-rc.13",
+      "resolved": "https://registry.npmmirror.com/@rolldown/binding-win32-arm64-msvc/-/binding-win32-arm64-msvc-1.0.0-rc.13.tgz",
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diff --git a/web/package.json b/web/package.json
new file mode 100644
index 0000000..b50e343
--- /dev/null
+++ b/web/package.json
@@ -0,0 +1,22 @@
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diff --git a/web/public/icons.svg b/web/public/icons.svg
new file mode 100644
index 0000000..e952219
--- /dev/null
+++ b/web/public/icons.svg
@@ -0,0 +1,24 @@
+<svg xmlns="http://www.w3.org/2000/svg">
+  <symbol id="bluesky-icon" viewBox="0 0 16 17">
+    <g clip-path="url(#bluesky-clip)"><path fill="#08060d" d="M7.75 7.735c-.693-1.348-2.58-3.86-4.334-5.097-1.68-1.187-2.32-.981-2.74-.79C.188 2.065.1 2.812.1 3.251s.241 3.602.398 4.13c.52 1.744 2.367 2.333 4.07 2.145-2.495.37-4.71 1.278-1.805 4.512 3.196 3.309 4.38-.71 4.987-2.746.608 2.036 1.307 5.91 4.93 2.746 2.72-2.746.747-4.143-1.747-4.512 1.702.189 3.55-.4 4.07-2.145.156-.528.397-3.691.397-4.13s-.088-1.186-.575-1.406c-.42-.19-1.06-.395-2.741.79-1.755 1.24-3.64 3.752-4.334 5.099"/></g>
+    <defs><clipPath id="bluesky-clip"><path fill="#fff" d="M.1.85h15.3v15.3H.1z"/></clipPath></defs>
+  </symbol>
+  <symbol id="discord-icon" viewBox="0 0 20 19">
+    <path fill="#08060d" d="M16.224 3.768a14.5 14.5 0 0 0-3.67-1.153c-.158.286-.343.67-.47.976a13.5 13.5 0 0 0-4.067 0c-.128-.306-.317-.69-.476-.976A14.4 14.4 0 0 0 3.868 3.77C1.546 7.28.916 10.703 1.231 14.077a14.7 14.7 0 0 0 4.5 2.306q.545-.748.965-1.587a9.5 9.5 0 0 1-1.518-.74q.191-.14.372-.293c2.927 1.369 6.107 1.369 8.999 0q.183.152.372.294-.723.437-1.52.74.418.838.963 1.588a14.6 14.6 0 0 0 4.504-2.308c.37-3.911-.63-7.302-2.644-10.309m-9.13 8.234c-.878 0-1.599-.82-1.599-1.82 0-.998.705-1.82 1.6-1.82.894 0 1.614.82 1.599 1.82.001 1-.705 1.82-1.6 1.82m5.91 0c-.878 0-1.599-.82-1.599-1.82 0-.998.705-1.82 1.6-1.82.893 0 1.614.82 1.599 1.82 0 1-.706 1.82-1.6 1.82"/>
+  </symbol>
+  <symbol id="documentation-icon" viewBox="0 0 21 20">
+    <path fill="none" stroke="#aa3bff" stroke-linecap="round" stroke-linejoin="round" stroke-width="1.35" d="m15.5 13.333 1.533 1.322c.645.555.967.833.967 1.178s-.322.623-.967 1.179L15.5 18.333m-3.333-5-1.534 1.322c-.644.555-.966.833-.966 1.178s.322.623.966 1.179l1.534 1.321"/>
+    <path fill="none" stroke="#aa3bff" stroke-linecap="round" stroke-linejoin="round" stroke-width="1.35" d="M17.167 10.836v-4.32c0-1.41 0-2.117-.224-2.68-.359-.906-1.118-1.621-2.08-1.96-.599-.21-1.349-.21-2.848-.21-2.623 0-3.935 0-4.983.369-1.684.591-3.013 1.842-3.641 3.428C3 6.449 3 7.684 3 10.154v2.122c0 2.558 0 3.838.706 4.726q.306.383.713.671c.76.536 1.79.64 3.581.66"/>
+    <path fill="none" stroke="#aa3bff" stroke-linecap="round" stroke-linejoin="round" stroke-width="1.35" d="M3 10a2.78 2.78 0 0 1 2.778-2.778c.555 0 1.209.097 1.748-.047.48-.129.854-.503.982-.982.145-.54.048-1.194.048-1.749a2.78 2.78 0 0 1 2.777-2.777"/>
+  </symbol>
+  <symbol id="github-icon" viewBox="0 0 19 19">
+    <path fill="#08060d" fill-rule="evenodd" d="M9.356 1.85C5.05 1.85 1.57 5.356 1.57 9.694a7.84 7.84 0 0 0 5.324 7.44c.387.079.528-.168.528-.376 0-.182-.013-.805-.013-1.454-2.165.467-2.616-.935-2.616-.935-.349-.91-.864-1.143-.864-1.143-.71-.48.051-.48.051-.48.787.051 1.2.805 1.2.805.695 1.194 1.817.857 2.268.649.064-.507.27-.857.49-1.052-1.728-.182-3.545-.857-3.545-3.87 0-.857.31-1.558.8-2.104-.078-.195-.349-1 .077-2.078 0 0 .657-.208 2.14.805a7.5 7.5 0 0 1 1.946-.26c.657 0 1.328.092 1.946.26 1.483-1.013 2.14-.805 2.14-.805.426 1.078.155 1.883.078 2.078.502.546.799 1.247.799 2.104 0 3.013-1.818 3.675-3.558 3.87.284.247.528.714.528 1.454 0 1.052-.012 1.896-.012 2.156 0 .208.142.455.528.377a7.84 7.84 0 0 0 5.324-7.441c.013-4.338-3.48-7.844-7.773-7.844" clip-rule="evenodd"/>
+  </symbol>
+  <symbol id="social-icon" viewBox="0 0 20 20">
+    <path fill="none" stroke="#aa3bff" stroke-linecap="round" stroke-linejoin="round" stroke-width="1.35" d="M12.5 6.667a4.167 4.167 0 1 0-8.334 0 4.167 4.167 0 0 0 8.334 0"/>
+    <path fill="none" stroke="#aa3bff" stroke-linecap="round" stroke-linejoin="round" stroke-width="1.35" d="M2.5 16.667a5.833 5.833 0 0 1 8.75-5.053m3.837.474.513 1.035c.07.144.257.282.414.309l.93.155c.596.1.736.536.307.965l-.723.73a.64.64 0 0 0-.152.531l.207.903c.164.715-.213.991-.84.618l-.872-.52a.63.63 0 0 0-.577 0l-.872.52c-.624.373-1.003.094-.84-.618l.207-.903a.64.64 0 0 0-.152-.532l-.723-.729c-.426-.43-.289-.864.306-.964l.93-.156a.64.64 0 0 0 .412-.31l.513-1.034c.28-.562.735-.562 1.012 0"/>
+  </symbol>
+  <symbol id="x-icon" viewBox="0 0 19 19">
+    <path fill="#08060d" fill-rule="evenodd" d="M1.893 1.98c.052.072 1.245 1.769 2.653 3.77l2.892 4.114c.183.261.333.48.333.486s-.068.089-.152.183l-.522.593-.765.867-3.597 4.087c-.375.426-.734.834-.798.905a1 1 0 0 0-.118.148c0 .01.236.017.664.017h.663l.729-.83c.4-.457.796-.906.879-.999a692 692 0 0 0 1.794-2.038c.034-.037.301-.34.594-.675l.551-.624.345-.392a7 7 0 0 1 .34-.374c.006 0 .93 1.306 2.052 2.903l2.084 2.965.045.063h2.275c1.87 0 2.273-.003 2.266-.021-.008-.02-1.098-1.572-3.894-5.547-2.013-2.862-2.28-3.246-2.273-3.266.008-.019.282-.332 2.085-2.38l2-2.274 1.567-1.782c.022-.028-.016-.03-.65-.03h-.674l-.3.342a871 871 0 0 1-1.782 2.025c-.067.075-.405.458-.75.852a100 100 0 0 1-.803.91c-.148.172-.299.344-.99 1.127-.304.343-.32.358-.345.327-.015-.019-.904-1.282-1.976-2.808L6.365 1.85H1.8zm1.782.91 8.078 11.294c.772 1.08 1.413 1.973 1.425 1.984.016.017.241.02 1.05.017l1.03-.004-2.694-3.766L7.796 5.75 5.722 2.852l-1.039-.004-1.039-.004z" clip-rule="evenodd"/>
+  </symbol>
+</svg>
diff --git a/web/src/App.vue b/web/src/App.vue
new file mode 100644
index 0000000..0efcefe
--- /dev/null
+++ b/web/src/App.vue
@@ -0,0 +1,451 @@
+<template>
+  <div class="app">
+    <el-container>
+      <!-- 头部 -->
+      <el-header class="header">
+        <div class="header-inner">
+          <div class="header-content">
+            <h1 class="app-title" @click="mobileView = 'dashboard'">🚗 CarCost</h1>
+            
+            <!-- 桌面端：车辆选择 + 添加按钮 -->
+            <div class="desktop-nav">
+              <el-select 
+                v-model="selectedVehicle" 
+                placeholder="选择车辆" 
+                style="width: 180px"
+                @change="onVehicleChange"
+              >
+                <el-option
+                  v-for="vehicle in vehicles"
+                  :key="vehicle.id"
+                  :label="vehicle.name"
+                  :value="vehicle.id"
+                />
+              </el-select>
+              <el-divider direction="vertical" />
+              <el-button @click="showAddVehicle = true" title="添加车辆">
+                <el-icon><Plus /></el-icon> 车辆
+              </el-button>
+              <el-button v-if="selectedVehicle" @click="editCurrentVehicle" title="编辑车辆">
+                <el-icon><Edit /></el-icon> 编辑
+              </el-button>
+              <el-divider direction="vertical" />
+              <el-button @click="showAddFuel = true" title="添加加油记录">
+                <el-icon><Plus /></el-icon> 加油
+              </el-button>
+              <el-button @click="showAddCost = true" title="添加费用记录">
+                <el-icon><Plus /></el-icon> 费用
+              </el-button>
+            </div>
+            
+            <!-- 移动端：车辆选择 + 添加按钮 + 汉堡菜单 -->
+            <div class="mobile-nav">
+              <el-dropdown trigger="click" v-if="vehicles.length > 0">
+                <el-button>
+                  {{ selectedVehicleName || '选择车辆' }}
+                  <el-icon class="el-icon--right"><ArrowDown /></el-icon>
+                </el-button>
+                <template #dropdown>
+                  <el-dropdown-menu>
+                    <el-dropdown-item 
+                      v-for="vehicle in vehicles" 
+                      :key="vehicle.id"
+                      @click="selectVehicle(vehicle.id)"
+                    >
+                      {{ vehicle.name }}
+                    </el-dropdown-item>
+                    <el-dropdown-item divided @click="showAddVehicle = true">+ 添加车辆</el-dropdown-item>
+                    <el-dropdown-item v-if="selectedVehicle" @click="editCurrentVehicle">✏️ 编辑车辆</el-dropdown-item>
+                  </el-dropdown-menu>
+                </template>
+              </el-dropdown>
+              <el-button v-if="mobileView === 'fuel'" @click="showAddFuel = true">
+                <el-icon><Plus /></el-icon>
+              </el-button>
+              <el-button v-if="mobileView === 'cost'" @click="showAddCost = true">
+                <el-icon><Plus /></el-icon>
+              </el-button>
+              <el-dropdown trigger="click">
+                <el-button>
+                  <el-icon><Menu /></el-icon>
+                </el-button>
+                <template #dropdown>
+                  <el-dropdown-menu>
+                    <el-dropdown-item @click="mobileView = 'fuel'">⛽ 加油记录</el-dropdown-item>
+                    <el-dropdown-item @click="mobileView = 'cost'">💰 费用记录</el-dropdown-item>
+                  </el-dropdown-menu>
+                </template>
+              </el-dropdown>
+            </div>
+          </div>
+        </div>
+      </el-header>
+      
+      <el-main>
+        <div class="content-wrapper">
+        <!-- 移动端：车辆选择 -->
+        <div class="mobile-vehicle-select">
+          <el-select 
+            v-model="selectedVehicle" 
+            placeholder="选择车辆" 
+            style="width: 100%"
+            @change="onVehicleChange"
+          >
+            <el-option
+              v-for="vehicle in vehicles"
+              :key="vehicle.id"
+              :label="vehicle.name"
+              :value="vehicle.id"
+            />
+          </el-select>
+        </div>
+        
+        <!-- 桌面端布局 -->
+        <div class="desktop-layout">
+          <!-- 上方统计卡片 -->
+          <StatsCards :dashboard-data="dashboardData" :total-cost="totalCost" />
+          
+          <!-- 四个图表 -->
+          <DashboardCharts :vehicle-id="selectedVehicle" />
+          
+          <!-- 下方左右两栏：列表 -->
+          <el-row :gutter="20" class="records-row">
+            <el-col :span="12">
+              <FuelRecordsPanel 
+                :vehicle-id="selectedVehicle"
+                :show-charts="false"
+                :show-list="true"
+                @add-fuel="showAddFuel = true"
+              />
+            </el-col>
+            <el-col :span="12">
+              <CostRecordsPanel 
+                :vehicle-id="selectedVehicle"
+                :show-charts="false"
+                :show-list="true"
+                @add-cost="showAddCost = true"
+              />
+            </el-col>
+          </el-row>
+        </div>
+        
+        <!-- 移动端布局 -->
+        <div class="mobile-layout">
+          <!-- 仪表盘 -->
+          <div v-if="mobileView === 'dashboard'">
+            <StatsCards :dashboard-data="dashboardData" :total-cost="totalCost" />
+            <!-- 移动端图表 -->
+            <DashboardCharts :vehicle-id="selectedVehicle" />
+          </div>
+          
+          <!-- 加油记录 -->
+          <div v-if="mobileView === 'fuel'">
+            <FuelRecordsPanel 
+              :vehicle-id="selectedVehicle"
+              :show-charts="false"
+              :show-list="true"
+              @add-fuel="showAddFuel = true"
+            />
+          </div>
+          
+          <!-- 费用记录 -->
+          <div v-if="mobileView === 'cost'">
+            <CostRecordsPanel 
+              :vehicle-id="selectedVehicle"
+              :show-charts="false"
+              :show-list="true"
+              @add-cost="showAddCost = true"
+            />
+          </div>
+        </div>
+        </div>
+      </el-main>
+    </el-container>
+
+    <!-- 弹窗 -->
+    <AddVehicleDialog v-model:visible="showAddVehicle" @success="loadVehicles" />
+    <EditVehicleDialog v-model:visible="showEditVehicle" :vehicle="currentVehicle" @success="loadVehicles" />
+    <AddFuelDialog v-model:visible="showAddFuel" :vehicle-id="selectedVehicle" @success="onRecordAdded" />
+    <AddCostDialog v-model:visible="showAddCost" :vehicle-id="selectedVehicle" @success="onRecordAdded" />
+  </div>
+</template>
+
+<script setup>
+import { ref, onMounted, computed } from 'vue'
+import axios from 'axios'
+import { ElMessage } from 'element-plus'
+import { Menu, ArrowDown, Plus, Edit } from '@element-plus/icons-vue'
+import AddVehicleDialog from './components/dialogs/vehicle/AddVehicleDialog.vue'
+import EditVehicleDialog from './components/dialogs/vehicle/EditVehicleDialog.vue'
+import AddFuelDialog from './components/dialogs/fuel/AddFuelDialog.vue'
+import AddCostDialog from './components/dialogs/cost/AddCostDialog.vue'
+import StatsCards from './components/cards/StatsCards.vue'
+import DashboardCharts from './components/charts/DashboardCharts.vue'
+import FuelRecordsPanel from './components/panels/FuelRecordsPanel.vue'
+import CostRecordsPanel from './components/panels/CostRecordsPanel.vue'
+
+const API_BASE = 'https://api.yuany3721.site/carcost'
+
+const vehicles = ref([])
+const selectedVehicle = ref(null)
+const dashboardData = ref(null)
+const totalCost = ref(0)
+const mobileView = ref('dashboard') // 'dashboard', 'fuel', 'cost'
+
+// 当前选中车辆名称
+const selectedVehicleName = computed(() => {
+  const vehicle = vehicles.value.find(v => v.id === selectedVehicle.value)
+  return vehicle?.name || ''
+})
+
+const showAddVehicle = ref(false)
+const showAddFuel = ref(false)
+const showAddCost = ref(false)
+const showEditVehicle = ref(false)
+const currentVehicle = ref(null)
+
+// 加载车辆列表
+const loadVehicles = async () => {
+  try {
+    const res = await axios.get(`${API_BASE}/vehicles/list`)
+    vehicles.value = res.data
+    if (vehicles.value.length > 0 && !selectedVehicle.value) {
+      selectedVehicle.value = vehicles.value[0].id
+      loadDashboard()
+    }
+  } catch (error) {
+    ElMessage.error('加载车辆失败')
+  }
+}
+
+// 加载仪表盘数据
+const loadDashboard = async () => {
+  if (!selectedVehicle.value) return
+  try {
+    const res = await axios.get(`${API_BASE}/dashboard/data?vehicle_id=${selectedVehicle.value}`)
+    dashboardData.value = res.data
+    
+    // 加载总费用
+    const costRes = await axios.get(`${API_BASE}/costs/list?vehicle_id=${selectedVehicle.value}&limit=1000`)
+    const costs = costRes.data || []
+    totalCost.value = costs.reduce((sum, c) => sum + c.amount, 0)
+  } catch (error) {
+    ElMessage.error('加载数据失败')
+  }
+}
+
+// 切换车辆
+const onVehicleChange = () => {
+  loadDashboard()
+}
+
+// 移动端选择车辆
+const selectVehicle = (id) => {
+  selectedVehicle.value = id
+  onVehicleChange()
+}
+
+// 编辑当前车辆
+const editCurrentVehicle = () => {
+  if (!selectedVehicle.value) return
+  currentVehicle.value = vehicles.value.find(v => v.id === selectedVehicle.value)
+  showEditVehicle.value = true
+}
+
+// 记录添加成功后刷新
+const onRecordAdded = () => {
+  loadDashboard()
+}
+
+onMounted(() => {
+  loadVehicles()
+})
+</script>
+
+<style>
+/* 全局样式，去掉所有默认 margin/padding */
+* {
+  margin: 0;
+  padding: 0;
+  box-sizing: border-box;
+}
+
+html, body {
+  margin: 0;
+  padding: 0;
+  width: 100%;
+  overflow-x: hidden;
+}
+</style>
+
+<style scoped>
+.app {
+  min-height: 100vh;
+  background: #f5f7fa;
+  width: 100%;
+}
+
+.content-wrapper {
+  max-width: 900px;
+  margin: 0 auto;
+  width: 100%;
+}
+
+.header {
+  background: #fff;
+  border-bottom: 1px solid #e4e7ed;
+  padding: 0;
+}
+
+.header-inner {
+  max-width: 900px;
+  margin: 0 auto;
+  width: 100%;
+}
+
+.header-content {
+  display: flex;
+  align-items: center;
+  justify-content: space-between;
+  height: 60px;
+  padding: 0 20px;
+}
+
+.header h1 {
+  margin: 0;
+  font-size: 20px;
+  color: #303133;
+}
+
+.app-title {
+  cursor: pointer;
+}
+
+.app-title:hover {
+  opacity: 0.8;
+}
+
+.desktop-nav {
+  display: flex;
+  align-items: center;
+  gap: 10px;
+}
+
+.mobile-nav {
+  display: none;
+}
+
+.mobile-vehicle-select {
+  display: none;
+  margin-bottom: 15px;
+}
+
+.desktop-layout {
+  display: block;
+  width: 100%;
+  overflow-x: hidden;
+}
+
+.mobile-layout {
+  display: none;
+  width: 100%;
+  overflow-x: hidden;
+}
+
+.records-row {
+  margin: 0 -10px !important;
+  width: calc(100% + 20px);
+  display: flex;
+  align-items: stretch;
+}
+
+.records-row :deep(.el-col) {
+  padding-left: 10px !important;
+  padding-right: 10px !important;
+  display: flex;
+}
+
+.records-row :deep(.el-col > *) {
+  flex: 1;
+}
+
+.mobile-charts {
+  margin-top: 15px;
+}
+
+.mobile-tip {
+  margin-top: 20px;
+}
+
+/* 调整 main 的 padding */
+:deep(.el-main) {
+  padding: 20px !important;
+}
+
+@media (max-width: 768px) {
+  :deep(.el-main) {
+    padding: 10px !important;
+  }
+}
+
+:deep(.el-container) {
+  padding: 0 !important;
+}
+
+/* 移动端内容区域 */
+.mobile-layout {
+  padding: 0;
+}
+
+@media (max-width: 768px) {
+  :deep(.el-main) {
+    padding: 0 !important;
+  }
+}
+
+/* 弹窗默认样式（电脑端） */
+:deep(.el-dialog) {
+  width: 450px !important;
+}
+
+/* 移动端弹窗适配 */
+@media (max-width: 768px) {
+  :deep(.el-dialog) {
+    width: 90% !important;
+    max-width: 350px !important;
+  }
+}
+
+/* 移动端适配 */
+@media (max-width: 768px) {
+  .desktop-nav {
+    display: none;
+  }
+  
+  .mobile-nav {
+    display: flex;
+    align-items: center;
+    gap: 8px;
+  }
+  
+  .mobile-vehicle-select {
+    display: none;
+  }
+  
+  .desktop-layout {
+    display: none;
+  }
+  
+  .mobile-layout {
+    display: block;
+  }
+  
+  .header-content {
+    padding: 0 10px;
+  }
+  
+  .header h1 {
+    font-size: 18px;
+  }
+}
+</style>
diff --git a/web/src/assets/hero.png b/web/src/assets/hero.png
new file mode 100644
index 0000000..cc51a3d
Binary files /dev/null and b/web/src/assets/hero.png differ
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new file mode 100644
index 0000000..5101b67
--- /dev/null
+++ b/web/src/assets/vite.svg
@@ -0,0 +1 @@
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diff --git a/web/src/assets/vue.svg b/web/src/assets/vue.svg
new file mode 100644
index 0000000..770e9d3
--- /dev/null
+++ b/web/src/assets/vue.svg
@@ -0,0 +1 @@
+<svg xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink" aria-hidden="true" role="img" class="iconify iconify--logos" width="37.07" height="36" preserveAspectRatio="xMidYMid meet" viewBox="0 0 256 198"><path fill="#41B883" d="M204.8 0H256L128 220.8L0 0h97.92L128 51.2L157.44 0h47.36Z"></path><path fill="#41B883" d="m0 0l128 220.8L256 0h-51.2L128 132.48L50.56 0H0Z"></path><path fill="#35495E" d="M50.56 0L128 133.12L204.8 0h-47.36L128 51.2L97.92 0H50.56Z"></path></svg>
\ No newline at end of file
diff --git a/web/src/components/cards/StatsCards.vue b/web/src/components/cards/StatsCards.vue
new file mode 100644
index 0000000..903d45b
--- /dev/null
+++ b/web/src/components/cards/StatsCards.vue
@@ -0,0 +1,110 @@
+<template>
+  <el-card class="stats-card" v-if="dashboardData">
+    <el-row :gutter="20">
+      <el-col :xs="12" :sm="8" :md="4">
+        <el-statistic :value="dashboardData.total_mileage || 0" title="总里程">
+          <template #suffix>km</template>
+        </el-statistic>
+      </el-col>
+      <el-col :xs="12" :sm="8" :md="4">
+        <el-statistic :value="dashboardData.total_fuel_cost || 0" title="总油费">
+          <template #prefix>¥</template>
+        </el-statistic>
+      </el-col>
+      <el-col :xs="12" :sm="8" :md="4">
+        <el-statistic :value="totalCost" title="总费用">
+          <template #prefix>¥</template>
+        </el-statistic>
+      </el-col>
+      <el-col :xs="12" :sm="8" :md="4">
+        <el-statistic :value="fuelCostPerKm" :precision="2" title="每公里油费">
+          <template #prefix>¥</template>
+        </el-statistic>
+      </el-col>
+      <el-col :xs="12" :sm="8" :md="4">
+        <el-statistic :value="totalCostPerKm" :precision="2" title="每公里总成本">
+          <template #prefix>¥</template>
+        </el-statistic>
+      </el-col>
+      <el-col :xs="12" :sm="8" :md="4">
+        <el-statistic :value="dashboardData?.avg_daily_km || 0" title="日均行程">
+          <template #suffix>km</template>
+        </el-statistic>
+      </el-col>
+    </el-row>
+  </el-card>
+  <el-empty v-else description="暂无数据" />
+</template>
+
+<script setup>
+import { computed } from 'vue'
+
+const props = defineProps({
+  dashboardData: Object,
+  totalCost: {
+    type: Number,
+    default: 0
+  }
+})
+
+// 每公里油费
+const fuelCostPerKm = computed(() => {
+  if (!props.dashboardData?.total_mileage || props.dashboardData.total_mileage === 0) return 0
+  return (props.dashboardData.total_fuel_cost || 0) / props.dashboardData.total_mileage
+})
+
+// 每公里总成本
+const totalCostPerKm = computed(() => {
+  if (!props.dashboardData?.total_mileage || props.dashboardData.total_mileage === 0) return 0
+  const total = (props.dashboardData.total_fuel_cost || 0) + props.totalCost
+  return total / props.dashboardData.total_mileage
+})
+</script>
+
+<style scoped>
+.stats-card {
+  margin-bottom: 20px;
+}
+
+.stats-card :deep(.el-card__body) {
+  padding: 20px;
+}
+
+:deep(.el-statistic) {
+  text-align: center;
+}
+
+:deep(.el-statistic__content) {
+  font-size: 20px;
+  color: #409eff;
+  justify-content: center;
+}
+
+:deep(.el-statistic__title) {
+  font-size: 12px;
+  color: #909399;
+  text-align: center;
+}
+
+@media (max-width: 768px) {
+  .stats-card :deep(.el-card__body) {
+    padding: 15px 10px;
+  }
+  
+  :deep(.el-col) {
+    margin-bottom: 15px;
+  }
+  
+  :deep(.el-col:nth-last-child(-n+2)) {
+    margin-bottom: 0;
+  }
+  
+  :deep(.el-statistic__content) {
+    font-size: 18px;
+  }
+  
+  :deep(.el-statistic__title) {
+    font-size: 11px;
+  }
+}
+</style>
diff --git a/web/src/components/charts/DashboardCharts.vue b/web/src/components/charts/DashboardCharts.vue
new file mode 100644
index 0000000..1574015
--- /dev/null
+++ b/web/src/components/charts/DashboardCharts.vue
@@ -0,0 +1,657 @@
+<template>
+    <el-card class="dashboard-charts-card">
+        <!-- 时间选择器 -->
+        <div class="time-range-selector">
+            <el-radio-group v-model="timeRange" size="small">
+                <el-radio-button value="past_6months">近6个月</el-radio-button>
+                <el-radio-button value="past_year">近一年</el-radio-button>
+                <el-radio-button value="all">全部</el-radio-button>
+            </el-radio-group>
+        </div>
+
+        <!-- 四个图表 -->
+        <div class="charts-grid">
+            <!-- 费用类型分布 -->
+            <div class="chart-item" v-if="pieChartOption && allRecords.length > 0">
+                <div class="chart-title">📊 费用类型分布</div>
+                <div class="chart-content">
+                    <v-chart
+                        :option="pieChartOption"
+                        autoresize
+                        style="height: 220px; width: 100%"
+                    />
+                </div>
+            </div>
+            <div class="chart-item empty-chart" v-else>
+                <div class="chart-title">📊 费用类型分布</div>
+                <el-empty description="暂无数据" :image-size="60" />
+            </div>
+
+            <!-- 油耗趋势 -->
+            <div class="chart-item" v-if="consumptionChartOption && allRecords.length > 0">
+                <div class="chart-title">⛽ 油耗趋势</div>
+                <div class="chart-content">
+                    <v-chart
+                        :option="consumptionChartOption"
+                        autoresize
+                        style="height: 200px; width: 100%"
+                    />
+                </div>
+            </div>
+            <div class="chart-item empty-chart" v-else>
+                <div class="chart-title">⛽ 油耗趋势</div>
+                <el-empty description="暂无数据" :image-size="60" />
+            </div>
+
+            <!-- 月度费用统计 -->
+            <div class="chart-item" v-if="monthlyChartOption && allRecords.length > 0">
+                <div class="chart-title">📈 月度费用统计</div>
+                <div class="chart-content">
+                    <v-chart
+                        :option="monthlyChartOption"
+                        autoresize
+                        style="height: 200px; width: 100%"
+                    />
+                </div>
+            </div>
+            <div class="chart-item empty-chart" v-else>
+                <div class="chart-title">📈 月度费用统计</div>
+                <el-empty description="暂无数据" :image-size="60" />
+            </div>
+
+            <!-- 月度油费 -->
+            <div class="chart-item" v-if="monthlyCostChartOption && fuelRecords.length > 0">
+                <div class="chart-title">💰 月度油费</div>
+                <div class="chart-content">
+                    <v-chart
+                        :option="monthlyCostChartOption"
+                        autoresize
+                        style="height: 200px; width: 100%"
+                    />
+                </div>
+            </div>
+            <div class="chart-item empty-chart" v-else>
+                <div class="chart-title">💰 月度油费</div>
+                <el-empty description="暂无数据" :image-size="60" />
+            </div>
+        </div>
+    </el-card>
+</template>
+
+<script setup>
+import { ref, computed, watch, onMounted } from "vue";
+import axios from "axios";
+
+const props = defineProps({
+    vehicleId: Number,
+});
+
+const API_BASE = "https://api.yuany3721.site/carcost";
+
+// 检测是否为移动端
+const isMobile = ref(false);
+
+// 统一的时间范围（根据设备类型设置默认值）
+const timeRange = ref("past_year");
+
+onMounted(() => {
+    isMobile.value = window.innerWidth <= 768;
+    timeRange.value = isMobile.value ? "past_6months" : "past_year";
+});
+
+// 数据
+const allRecords = ref([]);
+const fuelRecords = ref([]);
+
+// 加载数据
+const loadData = async () => {
+    if (!props.vehicleId) return;
+    try {
+        const [fuelRes, costRes] = await Promise.all([
+            axios.get(`${API_BASE}/fuel-records/list?vehicle_id=${props.vehicleId}&limit=1000`),
+            axios.get(`${API_BASE}/costs/list?vehicle_id=${props.vehicleId}&limit=1000`),
+        ]);
+        fuelRecords.value = fuelRes.data || [];
+        allRecords.value = costRes.data || [];
+    } catch (error) {
+        console.error("加载数据失败");
+    }
+};
+
+watch(() => props.vehicleId, loadData, { immediate: true });
+
+// 计算费用分摊明细表
+const costInstallments = computed(() => {
+    const installments = [];
+
+    allRecords.value.forEach((cost) => {
+        if (cost.is_installment && cost.installment_months > 1) {
+            // 分摊费用，生成多条记录
+            const monthlyAmount = cost.amount / cost.installment_months;
+            const startMonth = cost.date.slice(0, 7);
+
+            for (let i = 0; i < cost.installment_months; i++) {
+                const month = getNextMonth(startMonth, i);
+                installments.push({
+                    month: month,
+                    type: cost.type,
+                    amount: monthlyAmount,
+                    originalCostId: cost.id,
+                });
+            }
+        } else {
+            // 一次性费用，生成一条记录
+            installments.push({
+                month: cost.date.slice(0, 7),
+                type: cost.type,
+                amount: cost.amount,
+                originalCostId: cost.id,
+            });
+        }
+    });
+
+    return installments;
+});
+
+// 获取N个月前的日期
+const getMonthsAgo = (months) => {
+    const now = new Date();
+    return new Date(now.getFullYear(), now.getMonth() - months, now.getDate());
+};
+
+// 根据时间范围筛选记录
+const getFilteredRecords = () => {
+    let filteredFuel = fuelRecords.value;
+    let filteredCost = allRecords.value;
+
+    if (timeRange.value === "past_6months") {
+        const sixMonthsAgo = getMonthsAgo(6);
+        const cutoffDate = sixMonthsAgo.toISOString().slice(0, 10);
+        filteredFuel = fuelRecords.value.filter((r) => r.date >= cutoffDate);
+        filteredCost = allRecords.value.filter((r) => r.date >= cutoffDate);
+    } else if (timeRange.value === "past_year") {
+        const oneYearAgo = getMonthsAgo(12);
+        const cutoffDate = oneYearAgo.toISOString().slice(0, 10);
+        filteredFuel = fuelRecords.value.filter((r) => r.date >= cutoffDate);
+        filteredCost = allRecords.value.filter((r) => r.date >= cutoffDate);
+    }
+
+    return { filteredFuel, filteredCost };
+};
+
+// 油耗趋势图
+const consumptionChartOption = computed(() => {
+    const { filteredFuel } = getFilteredRecords();
+    const validRecords = filteredFuel.filter((r) => r.fuel_consumption);
+
+    if (validRecords.length === 0) return null;
+
+    const data = validRecords
+        .sort((a, b) => a.mileage - b.mileage)
+        .map((r) => ({
+            value: [r.mileage, r.fuel_consumption],
+            date: r.date,
+            mileage: r.mileage,
+            fuelAmount: r.fuel_amount,
+        }));
+
+    const mileages = data.map((d) => d.value[0]);
+    const minMileage = Math.min(...mileages);
+    const maxMileage = Math.max(...mileages);
+    const padding = (maxMileage - minMileage) * 0.05;
+
+    // 找出最高3个和最低3个
+    const sorted = [...data].sort((a, b) => b.value[1] - a.value[1]);
+    const top3 = sorted.slice(0, 3);
+    const bottom3 = sorted.slice(-3);
+
+    const markPointData = [
+        ...top3.map((d) => ({
+            coord: d.value,
+            value: d.value[1].toFixed(1),
+            itemStyle: { color: "#f56c6c" },
+            label: { color: "#f56c6c", position: "top" },
+        })),
+        ...bottom3.map((d) => ({
+            coord: d.value,
+            value: d.value[1].toFixed(1),
+            itemStyle: { color: "#67c23a" },
+            label: { color: "#67c23a", position: "bottom" },
+        })),
+    ];
+
+    return {
+        grid: { left: "12%", right: "5%", top: "15%", bottom: "15%" },
+        xAxis: {
+            type: "value",
+            name: "km",
+            min: Math.floor(minMileage - padding),
+            max: Math.ceil(maxMileage + padding),
+            nameTextStyle: { fontSize: 11 },
+            axisLabel: { fontSize: 11 },
+        },
+        yAxis: {
+            type: "value",
+            name: "L/100km",
+            nameTextStyle: { fontSize: 11 },
+            axisLabel: { fontSize: 11 },
+        },
+        series: [
+            {
+                type: "line",
+                data: data.map((d) => d.value),
+                smooth: true,
+                symbol: "circle",
+                symbolSize: 6,
+                lineStyle: { color: "#409eff", width: 2 },
+                itemStyle: { color: "#409eff" },
+                areaStyle: {
+                    color: {
+                        type: "linear",
+                        x: 0,
+                        y: 0,
+                        x2: 0,
+                        y2: 1,
+                        colorStops: [
+                            { offset: 0, color: "rgba(64, 158, 255, 0.3)" },
+                            { offset: 1, color: "rgba(64, 158, 255, 0.05)" },
+                        ],
+                    },
+                },
+                markPoint: {
+                    data: markPointData,
+                    symbol: "circle",
+                    symbolSize: 10,
+                    itemStyle: { borderColor: "#fff", borderWidth: 2 },
+                    label: { fontSize: 9, formatter: "{c}" },
+                },
+                markLine: {
+                    silent: true,
+                    symbol: "none",
+                    data: [
+                        {
+                            type: "average",
+                            name: "平均",
+                            label: { formatter: "{c}", fontSize: 8, position: "insideEndTop" },
+                        },
+                    ],
+                    lineStyle: { color: "#909399", type: "dashed", width: 1 },
+                },
+            },
+        ],
+        tooltip: {
+            trigger: "item",
+            confine: true,
+            formatter: function (params) {
+                const d = data[params.dataIndex];
+                return `${d.date}<br/>里程: ${d.mileage}km<br/>加油: ${d.fuelAmount}L<br/>油耗: <b>${params.value[1]} L/100km</b>`;
+            },
+        },
+    };
+});
+
+// 月度油费图
+const monthlyCostChartOption = computed(() => {
+    const { filteredFuel } = getFilteredRecords();
+
+    const monthlyData = {};
+    filteredFuel.forEach((r) => {
+        const month = r.date.slice(0, 7);
+        monthlyData[month] = (monthlyData[month] || 0) + r.total_cost;
+    });
+
+    const sortedMonths = Object.keys(monthlyData).sort();
+    if (sortedMonths.length === 0) return null;
+
+    return {
+        grid: { left: "5%", right: "5%", top: "15%", bottom: "15%", containLabel: true },
+        xAxis: {
+            type: "category",
+            data: sortedMonths.map((m) => m.slice(5)),
+            axisLabel: { fontSize: 10 },
+            axisLine: { show: true },
+            axisTick: { show: false },
+        },
+        yAxis: { type: "value", show: false },
+        series: [
+            {
+                type: "bar",
+                data: sortedMonths.map((m) => monthlyData[m].toFixed(0)),
+                barWidth: "60%",
+                itemStyle: {
+                    color: "rgba(103, 194, 58, 0.6)",
+                    borderRadius: [4, 4, 0, 0],
+                },
+                label: {
+                    show: true,
+                    position: "top",
+                    fontSize: 9,
+                    formatter: "{c}",
+                },
+            },
+        ],
+        tooltip: {
+            trigger: "axis",
+            axisPointer: { type: "shadow" },
+            confine: true,
+        },
+    };
+});
+
+// 颜色映射
+const typeColorMap = {
+    保养: "#67c23a",
+    维修: "#e6a23c",
+    保险: "#f56c6c",
+    停车: "#909399",
+    过路费: "#9a60b4",
+    其他: "#fc8452",
+    油费: "#409eff",
+};
+
+// 费用类型分布
+const pieChartOption = computed(() => {
+    const { filteredFuel } = getFilteredRecords();
+
+    // 计算时间范围
+    const now = new Date();
+    const currentMonth = `${now.getFullYear()}-${String(now.getMonth() + 1).padStart(2, "0")}`;
+
+    // 确定筛选的月份范围
+    let targetMonths = [];
+    if (timeRange.value === "past_6months") {
+        // 近6个月：从当前月往前推5个月（共6个月）
+        for (let i = 5; i >= 0; i--) {
+            const d = new Date(now.getFullYear(), now.getMonth() - i, 1);
+            targetMonths.push(`${d.getFullYear()}-${String(d.getMonth() + 1).padStart(2, "0")}`);
+        }
+    } else if (timeRange.value === "past_year") {
+        // 近一年：从当前月往前推11个月（共12个月）
+        for (let i = 11; i >= 0; i--) {
+            const d = new Date(now.getFullYear(), now.getMonth() - i, 1);
+            targetMonths.push(`${d.getFullYear()}-${String(d.getMonth() + 1).padStart(2, "0")}`);
+        }
+    }
+    // "全部"模式下不过滤月份
+
+    const typeData = {};
+    let totalAmount = 0;
+
+    // 从分摊明细表中筛选数据
+    costInstallments.value.forEach((item) => {
+        if (timeRange.value === "all" || targetMonths.includes(item.month)) {
+            typeData[item.type] = (typeData[item.type] || 0) + item.amount;
+            totalAmount += item.amount;
+        }
+    });
+
+    let totalFuelCost = 0;
+    filteredFuel.forEach((r) => {
+        totalFuelCost += r.total_cost;
+    });
+    if (totalFuelCost > 0) {
+        typeData["油费"] = totalFuelCost;
+        totalAmount += totalFuelCost;
+    }
+
+    const data = Object.entries(typeData)
+        .map(([name, value]) => ({ name, value: parseFloat(value.toFixed(0)) }))
+        .sort((a, b) => b.value - a.value);
+
+    if (data.length === 0) return null;
+
+    return {
+        tooltip: { trigger: "item", formatter: "{b}: ¥{c} ({d}%)" },
+        legend: {
+            orient: "vertical",
+            right: "5%",
+            top: "center",
+            itemWidth: 10,
+            itemHeight: 10,
+            textStyle: { fontSize: 12 },
+        },
+        series: [
+            {
+                type: "pie",
+                radius: ["45%", "70%"],
+                center: ["35%", "50%"],
+                avoidLabelOverlap: false,
+                itemStyle: { borderRadius: 5, borderColor: "#fff", borderWidth: 2 },
+                label: { show: false },
+                emphasis: {
+                    label: { show: true, fontSize: 12, fontWeight: "bold" },
+                    scale: true,
+                    scaleSize: 5,
+                },
+                data: data.map((d) => ({ ...d, itemStyle: { color: typeColorMap[d.name] || "#909399" } })),
+            },
+        ],
+        title: {
+            text: `¥${totalAmount.toFixed(0)}`,
+            left: "34.2%",
+            top: "46%",
+            textAlign: "center",
+            textStyle: {
+                fontSize: 16,
+                color: "#303133",
+                fontWeight: "bold",
+            },
+        },
+    };
+});
+
+// 月度费用统计
+const monthlyChartOption = computed(() => {
+    const { filteredFuel } = getFilteredRecords();
+
+    const monthlyData = {};
+    const allTypes = ["保养", "维修", "保险", "停车", "过路费", "其他", "油费"];
+
+    // 计算时间范围
+    const now = new Date();
+
+    // 计算当前月份
+    const currentMonth = `${now.getFullYear()}-${String(now.getMonth() + 1).padStart(2, "0")}`;
+
+    // 生成分摊明细表中涉及的所有月份
+    const allMonthsSet = new Set();
+    costInstallments.value.forEach((item) => allMonthsSet.add(item.month));
+    filteredFuel.forEach((r) => allMonthsSet.add(r.date.slice(0, 7)));
+
+    let targetMonths = Array.from(allMonthsSet).sort();
+
+    // 根据时间范围筛选
+    if (timeRange.value === "past_6months") {
+        // 近6个月：从当前月往前推5个月（共6个月）
+        const cutoffDate = new Date(now.getFullYear(), now.getMonth() - 5, 1);
+        const cutoffMonth = `${cutoffDate.getFullYear()}-${String(cutoffDate.getMonth() + 1).padStart(2, "0")}`;
+        targetMonths = targetMonths.filter((m) => m >= cutoffMonth && m <= currentMonth);
+    } else if (timeRange.value === "past_year") {
+        // 近一年：从当前月往前推11个月（共12个月）
+        const cutoffDate = new Date(now.getFullYear(), now.getMonth() - 11, 1);
+        const cutoffMonth = `${cutoffDate.getFullYear()}-${String(cutoffDate.getMonth() + 1).padStart(2, "0")}`;
+        targetMonths = targetMonths.filter((m) => m >= cutoffMonth && m <= currentMonth);
+    }
+    // "全部"模式下显示所有月份（包括未来的分摊月份），不过滤
+
+    // 初始化月度数据
+    targetMonths.forEach((month) => {
+        monthlyData[month] = {};
+        allTypes.forEach((type) => (monthlyData[month][type] = 0));
+    });
+
+    // 使用分摊明细表统计费用
+    costInstallments.value.forEach((item) => {
+        if (monthlyData[item.month]) {
+            monthlyData[item.month][item.type] += item.amount;
+        }
+    });
+
+    // 添加油费（使用筛选后的）
+    filteredFuel.forEach((r) => {
+        const month = r.date.slice(0, 7);
+        if (monthlyData[month]) monthlyData[month]["油费"] += r.total_cost;
+    });
+
+    // 确定存在的类型
+    const existingTypes = allTypes.filter((type) => targetMonths.some((month) => monthlyData[month][type] > 0));
+
+    // 计算每月总计
+    const monthlyTotals = targetMonths.map((month) => {
+        const total = existingTypes.reduce((sum, type) => sum + monthlyData[month][type], 0);
+        return total.toFixed(0);
+    });
+
+    return {
+        grid: { left: "3%", right: "3%", top: "20%", bottom: "10%", containLabel: true },
+        tooltip: {
+            trigger: "axis",
+            axisPointer: { type: "shadow" },
+            confine: true,
+            formatter: function (params) {
+                const validParams = params.filter((p) => p.value > 0);
+                if (validParams.length === 0) return "";
+                let html = `<div style="font-weight:bold;margin-bottom:5px;">${params[0].axisValue}</div>`;
+                validParams.forEach((p) => {
+                    html += `<div style="display:flex;align-items:center;margin:3px 0;">
+            <span style="display:inline-block;width:10px;height:10px;background:${p.color};border-radius:50%;margin-right:5px;"></span>
+            <span>${p.seriesName}: ¥${p.value.toFixed(0)}</span>
+          </div>`;
+                });
+                const total = validParams.reduce((sum, p) => sum + p.value, 0);
+                html += `<div style="border-top:1px solid #ccc;margin-top:5px;padding-top:5px;font-weight:bold;">总计: ¥${total.toFixed(0)}</div>`;
+                return html;
+            },
+        },
+        legend: {
+            top: "0%",
+            textStyle: { fontSize: 11 },
+            itemWidth: 10,
+            itemHeight: 10,
+            data: existingTypes,
+        },
+        xAxis: {
+            type: "category",
+            data: targetMonths.map((m) => m.slice(5)),
+            axisLabel: { fontSize: 10 },
+            axisLine: { show: true },
+            axisTick: { show: false },
+        },
+        yAxis: { type: "value", show: false },
+        series: [
+            ...existingTypes.map((type, index) => ({
+                name: type,
+                type: "bar",
+                stack: "total",
+                data: targetMonths.map((month) => parseFloat(monthlyData[month][type].toFixed(0))),
+                itemStyle: { color: typeColorMap[type] || "#909399" },
+            })),
+            {
+                name: "总计",
+                type: "bar",
+                stack: "total",
+                data: targetMonths.map(() => 0),
+                label: {
+                    show: true,
+                    position: "top",
+                    fontSize: 9,
+                    formatter: function (params) {
+                        return monthlyTotals[params.dataIndex];
+                    },
+                    color: "#606266",
+                    distance: 5,
+                },
+                itemStyle: { color: "transparent" },
+                tooltip: { show: false },
+                showInLegend: false,
+            },
+        ],
+    };
+});
+
+// 辅助函数：获取下N个月
+const getNextMonth = (month, n) => {
+    const [year, mon] = month.split("-").map(Number);
+    let targetYear = year;
+    let targetMon = mon + n;
+    while (targetMon > 12) {
+        targetMon -= 12;
+        targetYear++;
+    }
+    return `${targetYear}-${String(targetMon).padStart(2, "0")}`;
+};
+</script>
+
+<style scoped>
+.dashboard-charts-card {
+    margin-bottom: 20px;
+    max-width: 100%;
+    overflow: hidden;
+}
+
+.time-range-selector {
+    display: flex;
+    justify-content: center;
+    padding: 15px;
+    border-bottom: 1px solid #e4e7ed;
+}
+
+.charts-grid {
+    display: grid;
+    grid-template-columns: 1fr;
+    gap: 20px;
+    padding: 20px 10px;
+}
+
+@media (max-width: 768px) {
+    .charts-grid {
+        grid-template-columns: 1fr;
+        padding: 10px 5px;
+        gap: 15px;
+    }
+}
+
+.chart-item {
+    background: transparent;
+    border-radius: 8px;
+    padding: 15px;
+    min-height: 220px;
+    max-width: 100%;
+    overflow: hidden;
+}
+
+.chart-item.empty-chart {
+    display: flex;
+    flex-direction: column;
+    align-items: center;
+    justify-content: center;
+}
+
+.chart-item.empty-chart .el-empty {
+    padding: 20px 0;
+}
+
+.chart-content {
+    max-width: 100%;
+    overflow: hidden;
+}
+
+.chart-title {
+    font-size: 14px;
+    font-weight: bold;
+    color: #303133;
+    margin-bottom: 10px;
+    text-align: center;
+}
+
+@media (max-width: 768px) {
+    .charts-grid {
+        padding: 10px;
+        gap: 15px;
+    }
+
+    .chart-item {
+        padding: 10px;
+    }
+}
+</style>
diff --git a/web/src/components/dialogs/cost/AddCostDialog.vue b/web/src/components/dialogs/cost/AddCostDialog.vue
new file mode 100644
index 0000000..25085b7
--- /dev/null
+++ b/web/src/components/dialogs/cost/AddCostDialog.vue
@@ -0,0 +1,224 @@
+<template>
+  <el-dialog
+    v-model="visible"
+    title="添加费用记录"
+    class="cost-dialog"
+  >
+    <el-form :model="form" class="cost-form" label-width="100px" :label-position="isMobile ? 'top' : 'right'">
+      <el-form-item label="费用类型" required class="desktop-only">
+        <el-select-v2
+          v-model="form.type"
+          :options="costTypeOptions"
+          placeholder="选择或输入类型"
+          allow-create
+          filterable
+          clearable
+          style="width: 100%"
+        />
+      </el-form-item>
+      <el-form-item label="费用类型" required class="mobile-only">
+        <el-select-v2
+          v-model="form.type"
+          :options="costTypeOptions"
+          placeholder="选择或输入类型"
+          allow-create
+          filterable
+          clearable
+          style="width: 100%"
+        />
+      </el-form-item>
+      
+      <el-form-item label="日期" required class="desktop-only">
+        <el-date-picker
+          v-model="form.date"
+          type="date"
+          placeholder="选择日期"
+          style="width: 100%"
+          value-format="YYYY-MM-DD"
+        />
+      </el-form-item>
+      <el-form-item label="日期" required class="mobile-only">
+        <el-date-picker
+          v-model="form.date"
+          type="date"
+          placeholder="选择日期"
+          style="width: 100%"
+          value-format="YYYY-MM-DD"
+        />
+      </el-form-item>
+      
+      <el-form-item label="金额 (¥)" required class="desktop-only">
+        <el-input-number v-model="form.amount" :min="0" :precision="2" style="width: 100%" placeholder="金额" />
+      </el-form-item>
+      <el-form-item label="金额 (¥)" required class="mobile-only">
+        <el-input-number v-model="form.amount" :min="0" :precision="2" :controls="false" style="width: 100%" placeholder="金额" />
+      </el-form-item>
+      
+      <!-- 分摊设置 -->
+      <el-form-item label="费用分摊" class="desktop-only">
+        <div style="display: flex; align-items: center; gap: 15px;">
+          <el-switch v-model="form.is_installment" active-text="分摊" inactive-text="一次性" />
+          <el-input-number 
+            v-if="form.is_installment" 
+            v-model="form.installment_months" 
+            :min="1" 
+            :max="60" 
+            style="width: 120px" 
+          />
+          <span v-if="form.is_installment" style="color: #909399; font-size: 12px;">个月</span>
+        </div>
+      </el-form-item>
+      <el-form-item label="费用分摊" class="mobile-only">
+        <div style="display: flex; flex-direction: column; gap: 10px;">
+          <div style="display: flex; align-items: center; gap: 10px;">
+            <el-switch v-model="form.is_installment" />
+            <span style="font-size: 14px; color: #606266;">{{ form.is_installment ? '分摊' : '一次性' }}</span>
+          </div>
+          <el-input-number 
+            v-if="form.is_installment" 
+            v-model="form.installment_months" 
+            :min="1" 
+            :controls="false" 
+            :max="60" 
+            style="width: 100%" 
+            placeholder="分摊月数"
+          />
+        </div>
+      </el-form-item>
+      
+      <el-form-item label="备注" class="desktop-only">
+        <el-input v-model="form.notes" type="textarea" :rows="2" placeholder="备注（可选）" />
+      </el-form-item>
+      <el-form-item label="备注" class="mobile-only">
+        <el-input v-model="form.notes" type="textarea" :rows="2" placeholder="备注（可选）" />
+      </el-form-item>
+    </el-form>
+    <template #footer>
+      <el-button @click="visible = false">取消</el-button>
+      <el-button type="primary" @click="submit" :loading="loading">确定</el-button>
+    </template>
+  </el-dialog>
+</template>
+
+<script setup>
+import { ref, computed, onMounted, onUnmounted } from 'vue'
+import axios from 'axios'
+import { ElMessage } from 'element-plus'
+
+const props = defineProps(['visible', 'vehicleId'])
+const emit = defineEmits(['update:visible', 'success'])
+
+const API_BASE = 'https://api.yuany3721.site/carcost'
+
+const visible = computed({
+  get: () => props.visible,
+  set: (val) => emit('update:visible', val)
+})
+
+const loading = ref(false)
+
+// 检测是否为移动端
+const isMobile = ref(false)
+const checkMobile = () => {
+  isMobile.value = window.innerWidth <= 768
+}
+onMounted(() => {
+  checkMobile()
+  window.addEventListener('resize', checkMobile)
+})
+onUnmounted(() => {
+  window.removeEventListener('resize', checkMobile)
+})
+
+// 默认费用类型选项
+const costTypeOptions = [
+  { label: '保养', value: '保养' },
+  { label: '维修', value: '维修' },
+  { label: '保险', value: '保险' },
+  { label: '停车', value: '停车' },
+  { label: '过路费', value: '过路费' },
+  { label: '其他', value: '其他' }
+]
+
+const form = ref({
+  type: '',
+  date: new Date().toISOString().split('T')[0],
+  amount: 0,
+  notes: '',
+  is_installment: false,
+  installment_months: 12
+})
+
+const submit = async () => {
+  if (!props.vehicleId) {
+    ElMessage.warning('请先选择车辆')
+    return
+  }
+  if (!form.value.type || !form.value.date || !form.value.amount) {
+    ElMessage.warning('请填写必填项')
+    return
+  }
+  
+  loading.value = true
+  try {
+    await axios.post(`${API_BASE}/costs/create`, {
+      vehicle_id: props.vehicleId,
+      type: form.value.type,
+      date: form.value.date,
+      amount: form.value.amount,
+      mileage: null,
+      notes: form.value.notes,
+      is_installment: form.value.is_installment,
+      installment_months: form.value.is_installment ? form.value.installment_months : 1
+    })
+    ElMessage.success('添加成功')
+    visible.value = false
+    form.value = { type: '', date: new Date().toISOString().split('T')[0], amount: 0, notes: '', is_installment: false, installment_months: 12 }
+    emit('success')
+  } catch (error) {
+    ElMessage.error('添加失败')
+  } finally {
+    loading.value = false
+  }
+}
+</script>
+
+<style scoped>
+/* 默认隐藏移动端 */
+.mobile-only {
+  display: none;
+}
+
+/* 移动端适配 */
+@media (max-width: 768px) {
+  :deep(.el-dialog.cost-dialog) {
+    width: 90% !important;
+    max-width: 350px;
+  }
+  
+  .desktop-only {
+    display: none;
+  }
+  
+  .mobile-only {
+    display: block;
+  }
+  
+  :deep(.cost-form .el-form-item) {
+    margin-bottom: 12px;
+  }
+  
+  :deep(.cost-form .mobile-only.el-form-item .el-form-item__content) {
+    margin-left: 0 !important;
+    width: 100% !important;
+  }
+  
+  :deep(.cost-form .el-form-item__content) {
+    margin-left: 0 !important;
+  }
+  
+  :deep(.cost-form) {
+    padding: 0 10px;
+  }
+}
+</style>
diff --git a/web/src/components/dialogs/cost/EditCostDialog.vue b/web/src/components/dialogs/cost/EditCostDialog.vue
new file mode 100644
index 0000000..21885d3
--- /dev/null
+++ b/web/src/components/dialogs/cost/EditCostDialog.vue
@@ -0,0 +1,183 @@
+<template>
+  <el-dialog
+    v-model="visible"
+    title="编辑费用记录"
+    width="450px"
+  >
+    <el-form :model="form" label-width="100px">
+      <el-form-item label="费用类型" required>
+        <el-select-v2
+          v-model="form.type"
+          :options="costTypeOptions"
+          placeholder="选择或输入类型"
+          allow-create
+          filterable
+          clearable
+          style="width: 100%"
+        />
+      </el-form-item>
+      <el-form-item label="日期" required>
+        <el-date-picker
+          v-model="form.date"
+          type="date"
+          placeholder="选择日期"
+          style="width: 100%"
+          value-format="YYYY-MM-DD"
+        />
+      </el-form-item>
+      <el-form-item label="金额 (¥)" required>
+        <el-input-number v-model="form.amount" :min="0" :precision="2" style="width: 100%" />
+      </el-form-item>
+      
+      <!-- 分摊设置 -->
+      <el-form-item label="费用分摊">
+        <div style="display: flex; align-items: center; gap: 15px;">
+          <el-switch v-model="form.is_installment" active-text="分摊" inactive-text="一次性" />
+          <el-input-number 
+            v-if="form.is_installment" 
+            v-model="form.installment_months" 
+            :min="1" 
+            :max="60" 
+            style="width: 120px" 
+          />
+          <span v-if="form.is_installment" style="color: #909399; font-size: 12px;">个月</span>
+        </div>
+      </el-form-item>
+      
+      <el-form-item label="备注">
+        <el-input v-model="form.notes" type="textarea" rows="2" placeholder="可选" />
+      </el-form-item>
+    </el-form>
+    <template #footer>
+      <el-button @click="visible = false">取消</el-button>
+      <el-button type="danger" @click="deleteRecord" :loading="deleting">删除</el-button>
+      <el-button type="primary" @click="submit" :loading="loading">保存</el-button>
+    </template>
+  </el-dialog>
+</template>
+
+<script setup>
+import { ref, computed, watch } from 'vue'
+import axios from 'axios'
+import { ElMessage, ElMessageBox } from 'element-plus'
+
+const props = defineProps(['visible', 'record'])
+const emit = defineEmits(['update:visible', 'success'])
+
+const API_BASE = 'https://api.yuany3721.site/carcost'
+
+const visible = computed({
+  get: () => props.visible,
+  set: (val) => emit('update:visible', val)
+})
+
+const loading = ref(false)
+const deleting = ref(false)
+
+// 默认费用类型选项
+const costTypeOptions = [
+  { label: '保养', value: '保养' },
+  { label: '维修', value: '维修' },
+  { label: '保险', value: '保险' },
+  { label: '停车', value: '停车' },
+  { label: '过路费', value: '过路费' },
+  { label: '其他', value: '其他' }
+]
+
+const form = ref({
+  id: null,
+  type: '',
+  date: '',
+  amount: 0,
+  notes: '',
+  is_installment: false,
+  installment_months: 12
+})
+
+// 当 record 变化时更新表单
+watch(() => props.record, (newRecord) => {
+  if (newRecord) {
+    form.value = {
+      id: newRecord.id,
+      type: newRecord.type,
+      date: newRecord.date,
+      amount: newRecord.amount,
+      notes: newRecord.notes || '',
+      is_installment: newRecord.is_installment || false,
+      installment_months: newRecord.installment_months || 12
+    }
+  }
+}, { immediate: true })
+
+const submit = async () => {
+  if (!form.value.id) {
+    ElMessage.error('记录ID不存在')
+    return
+  }
+  if (!form.value.type || !form.value.date || !form.value.amount) {
+    ElMessage.warning('请填写必填项')
+    return
+  }
+  
+  loading.value = true
+  try {
+    // 构建请求体，只在不分摊时不发送 installment_months
+    const requestBody = {
+      id: form.value.id,
+      type: form.value.type,
+      date: form.value.date,
+      amount: form.value.amount,
+      mileage: null,
+      notes: form.value.notes,
+      is_installment: form.value.is_installment,
+    }
+    
+    // 只在分摊时发送 installment_months
+    if (form.value.is_installment) {
+      requestBody.installment_months = form.value.installment_months
+    }
+    
+    await axios.post(`${API_BASE}/costs/update`, requestBody)
+    ElMessage.success('保存成功')
+    visible.value = false
+    emit('success')
+  } catch (error) {
+    console.error('保存失败:', error)
+    if (error.response) {
+      console.error('状态码:', error.response.status)
+      console.error('响应数据:', error.response.data)
+      ElMessage.error(`保存失败: ${JSON.stringify(error.response.data)}`)
+    } else {
+      ElMessage.error('保存失败: ' + (error.message || '未知错误'))
+    }
+  } finally {
+    loading.value = false
+  }
+}
+
+const deleteRecord = async () => {
+  if (!form.value.id) return
+  
+  try {
+    await ElMessageBox.confirm('确定要删除这条费用记录吗？', '提示', {
+      confirmButtonText: '确定',
+      cancelButtonText: '取消',
+      type: 'warning'
+    })
+    
+    deleting.value = true
+    await axios.post(`${API_BASE}/costs/delete`, {
+      id: form.value.id
+    })
+    ElMessage.success('删除成功')
+    visible.value = false
+    emit('success')
+  } catch (error) {
+    if (error !== 'cancel') {
+      ElMessage.error('删除失败')
+    }
+  } finally {
+    deleting.value = false
+  }
+}
+</script>
diff --git a/web/src/components/dialogs/fuel/AddFuelDialog.vue b/web/src/components/dialogs/fuel/AddFuelDialog.vue
new file mode 100644
index 0000000..cbb9bd3
--- /dev/null
+++ b/web/src/components/dialogs/fuel/AddFuelDialog.vue
@@ -0,0 +1,316 @@
+<template>
+  <el-dialog
+    v-model="visible"
+    title="添加加油记录"
+    class="fuel-dialog"
+  >
+    <el-form :model="form" class="fuel-form" label-width="100px" :label-position="isMobile ? 'top' : 'right'">
+      <el-form-item label="日期" class="desktop-only">
+        <el-date-picker
+          v-model="form.date"
+          type="date"
+          placeholder="选择日期"
+          style="width: 100%"
+          value-format="YYYY-MM-DD"
+        />
+      </el-form-item>
+      <el-form-item label="日期" class="mobile-only">
+        <el-date-picker
+          v-model="form.date"
+          type="date"
+          placeholder="选择日期"
+          style="width: 100%"
+          value-format="YYYY-MM-DD"
+        />
+      </el-form-item>
+      
+      <el-form-item label="里程 (km)" class="desktop-only">
+        <el-input-number v-model="form.mileage" :min="0" style="width: 100%" placeholder="当前里程" />
+      </el-form-item>
+      <el-form-item label="里程 (km)" class="mobile-only">
+        <el-input-number v-model="form.mileage" :min="0" :controls="false" style="width: 100%" placeholder="当前里程" />
+      </el-form-item>
+      
+      <!-- 三个核心字段 -->
+      <el-form-item label="单价 (¥/L)" class="desktop-only">
+        <el-input-number 
+          v-model="form.fuel_price" 
+          :min="0" 
+          :precision="2" 
+          style="width: 100%" 
+          placeholder="机显单价"
+          @change="onPriceChange"
+        />
+      </el-form-item>
+      <el-form-item label="单价 (¥/L)" class="mobile-only">
+        <el-input-number 
+          v-model="form.fuel_price" 
+          :min="0" 
+          :precision="2" 
+          :controls="false"
+          style="width: 100%" 
+          placeholder="机显单价"
+          @change="onPriceChange"
+        />
+      </el-form-item>
+      
+      <el-form-item label="加油量 (L)" class="desktop-only">
+        <el-input-number 
+          v-model="form.fuel_amount" 
+          :min="0" 
+          :precision="2" 
+          style="width: 100%" 
+          placeholder="加油量"
+          @change="onAmountChange"
+        />
+      </el-form-item>
+      <el-form-item label="加油量 (L)" class="mobile-only">
+        <el-input-number 
+          v-model="form.fuel_amount" 
+          :min="0" 
+          :precision="2" 
+          :controls="false"
+          style="width: 100%" 
+          placeholder="加油量"
+          @change="onAmountChange"
+        />
+      </el-form-item>
+      
+      <el-form-item label="机显总价 (¥)" class="desktop-only">
+        <el-input-number 
+          v-model="form.display_cost" 
+          :min="0" 
+          :precision="2" 
+          style="width: 100%" 
+          placeholder="机显金额（选填，可自动计算）"
+          @change="onDisplayCostChange"
+        />
+      </el-form-item>
+      <el-form-item label="机显总价 (¥)" class="mobile-only">
+        <el-input-number 
+          v-model="form.display_cost" 
+          :min="0" 
+          :precision="2" 
+          :controls="false"
+          style="width: 100%" 
+          placeholder="机显金额（选填，可自动计算）"
+          @change="onDisplayCostChange"
+        />
+      </el-form-item>
+      
+      <!-- 实付金额 -->
+      <el-form-item label="实付金额 (¥)" class="desktop-only">
+        <el-input-number v-model="form.actual_cost" :min="0" :precision="2" style="width: 100%" placeholder="实际支付金额（优惠后）" />
+        <div class="hint">用于统计实际花费，不填则使用机显总价</div>
+      </el-form-item>
+      <el-form-item label="实付金额 (¥)" class="mobile-only">
+        <el-input-number v-model="form.actual_cost" :min="0" :precision="2" :controls="false" style="width: 100%" placeholder="实际支付金额" />
+      </el-form-item>
+      
+      <el-form-item label="是否加满" class="desktop-only">
+        <el-switch v-model="form.is_full_tank" active-text="是" inactive-text="否" />
+      </el-form-item>
+      <el-form-item label="是否加满" class="mobile-only">
+        <el-switch v-model="form.is_full_tank" />
+      </el-form-item>
+      
+      <el-form-item label="备注" class="desktop-only">
+        <el-input v-model="form.notes" type="textarea" :rows="2" placeholder="备注（可选）" />
+      </el-form-item>
+      <el-form-item label="备注" class="mobile-only">
+        <el-input v-model="form.notes" type="textarea" :rows="2" placeholder="备注（可选）" />
+      </el-form-item>
+    </el-form>
+    <template #footer>
+      <el-button @click="visible = false">取消</el-button>
+      <el-button type="primary" @click="submit" :loading="loading">确定</el-button>
+    </template>
+  </el-dialog>
+</template>
+
+<script setup>
+import { ref, computed, onMounted, onUnmounted } from 'vue'
+import axios from 'axios'
+import { ElMessage } from 'element-plus'
+
+const props = defineProps(['visible', 'vehicleId'])
+const emit = defineEmits(['update:visible', 'success'])
+
+const API_BASE = 'https://api.yuany3721.site/carcost'
+
+const visible = computed({
+  get: () => props.visible,
+  set: (val) => emit('update:visible', val)
+})
+
+const loading = ref(false)
+
+// 检测是否为移动端
+const isMobile = ref(false)
+const checkMobile = () => {
+  isMobile.value = window.innerWidth <= 768
+}
+onMounted(() => {
+  checkMobile()
+  window.addEventListener('resize', checkMobile)
+})
+onUnmounted(() => {
+  window.removeEventListener('resize', checkMobile)
+})
+
+const form = ref({
+  date: new Date().toISOString().split('T')[0],
+  mileage: 0,
+  fuel_amount: null,
+  fuel_price: null,
+  display_cost: null,
+  actual_cost: null,
+  is_full_tank: true,
+  notes: ''
+})
+
+// 标记哪个字段是最后修改的，避免循环计算
+let lastModified = null
+
+// 单价变化：如果加油量有值，重新计算总价
+const onPriceChange = () => {
+  lastModified = 'price'
+  if (form.value.fuel_price && form.value.fuel_amount) {
+    form.value.display_cost = Math.round(form.value.fuel_price * form.value.fuel_amount * 100) / 100
+  }
+}
+
+// 加油量变化：根据已有数据计算缺失的
+const onAmountChange = () => {
+  lastModified = 'amount'
+  if (form.value.fuel_amount && form.value.fuel_price) {
+    // 有单价，计算总价
+    form.value.display_cost = Math.round(form.value.fuel_price * form.value.fuel_amount * 100) / 100
+  } else if (form.value.fuel_amount && form.value.display_cost) {
+    // 有总价，计算单价
+    form.value.fuel_price = Math.round(form.value.display_cost / form.value.fuel_amount * 100) / 100
+  }
+}
+
+// 总价变化：根据已有数据计算缺失的
+const onDisplayCostChange = () => {
+  lastModified = 'cost'
+  if (form.value.display_cost && form.value.fuel_price) {
+    // 有单价，计算加油量
+    form.value.fuel_amount = Math.round(form.value.display_cost / form.value.fuel_price * 100) / 100
+  } else if (form.value.display_cost && form.value.fuel_amount) {
+    // 有加油量，计算单价
+    form.value.fuel_price = Math.round(form.value.display_cost / form.value.fuel_amount * 100) / 100
+  }
+}
+
+const submit = async () => {
+  if (!props.vehicleId) {
+    ElMessage.warning('请先选择车辆')
+    return
+  }
+  if (!form.value.date || !form.value.mileage) {
+    ElMessage.warning('请填写日期和里程')
+    return
+  }
+  
+  // 检查单价和加油量是否都有值
+  const hasPrice = form.value.fuel_price !== null && form.value.fuel_price > 0
+  const hasAmount = form.value.fuel_amount !== null && form.value.fuel_amount > 0
+  
+  if (!hasPrice || !hasAmount) {
+    ElMessage.warning('请填写单价和加油量')
+    return
+  }
+  
+  // 如果机显总价为空，自动计算
+  let displayCost = form.value.display_cost
+  if (!displayCost || displayCost <= 0) {
+    displayCost = Math.round(form.value.fuel_price * form.value.fuel_amount * 100) / 100
+  }
+  
+  // 实付金额默认使用机显总价
+  const totalCost = form.value.actual_cost !== null && form.value.actual_cost > 0 
+    ? form.value.actual_cost 
+    : displayCost
+  
+  loading.value = true
+  try {
+    await axios.post(`${API_BASE}/fuel-records/create`, {
+      vehicle_id: props.vehicleId,
+      date: form.value.date,
+      mileage: form.value.mileage,
+      fuel_amount: form.value.fuel_amount,
+      fuel_price: form.value.fuel_price,
+      total_cost: totalCost,
+      is_full_tank: form.value.is_full_tank,
+      notes: form.value.notes || ''
+    })
+    ElMessage.success('添加成功')
+    visible.value = false
+    // 重置表单
+    form.value = {
+      date: new Date().toISOString().split('T')[0],
+      mileage: 0,
+      fuel_amount: null,
+      fuel_price: null,
+      display_cost: null,
+      actual_cost: null,
+      is_full_tank: true,
+      notes: ''
+    }
+    lastModified = null
+    emit('success')
+  } catch (error) {
+    ElMessage.error('添加失败')
+  } finally {
+    loading.value = false
+  }
+}
+</script>
+
+<style scoped>
+.hint {
+  font-size: 12px;
+  color: #909399;
+  margin-top: 4px;
+}
+
+/* 默认隐藏移动端 */
+.mobile-only {
+  display: none;
+}
+
+/* 移动端适配 */
+@media (max-width: 768px) {
+  :deep(.el-dialog.fuel-dialog) {
+    width: 90% !important;
+    max-width: 350px;
+  }
+  
+  .desktop-only {
+    display: none;
+  }
+  
+  .mobile-only {
+    display: block;
+  }
+  
+  :deep(.fuel-form .el-form-item) {
+    margin-bottom: 12px;
+  }
+  
+  :deep(.fuel-form .mobile-only.el-form-item .el-form-item__content) {
+    margin-left: 0 !important;
+    width: 100% !important;
+  }
+  
+  :deep(.fuel-form .el-form-item__content) {
+    margin-left: 0 !important;
+  }
+  
+  :deep(.fuel-form) {
+    padding: 0 10px;
+  }
+}
+</style>
diff --git a/web/src/components/dialogs/fuel/EditFuelDialog.vue b/web/src/components/dialogs/fuel/EditFuelDialog.vue
new file mode 100644
index 0000000..22c3612
--- /dev/null
+++ b/web/src/components/dialogs/fuel/EditFuelDialog.vue
@@ -0,0 +1,231 @@
+<template>
+  <el-dialog
+    v-model="visible"
+    title="编辑加油记录"
+    width="450px"
+  >
+    <el-form :model="form" label-width="100px">
+      <el-form-item label="日期" required>
+        <el-date-picker
+          v-model="form.date"
+          type="date"
+          placeholder="选择日期"
+          style="width: 100%"
+          value-format="YYYY-MM-DD"
+        />
+      </el-form-item>
+      <el-form-item label="里程 (km)" required>
+        <el-input-number v-model="form.mileage" :min="0" style="width: 100%" />
+      </el-form-item>
+      
+      <!-- 三个核心字段 -->
+      <el-form-item label="单价 (¥/L)">
+        <el-input-number 
+          v-model="form.fuel_price" 
+          :min="0" 
+          :precision="2" 
+          style="width: 100%" 
+          placeholder="机显单价"
+          @change="onPriceChange"
+        />
+      </el-form-item>
+      <el-form-item label="加油量 (L)">
+        <el-input-number 
+          v-model="form.fuel_amount" 
+          :min="0" 
+          :precision="2" 
+          style="width: 100%" 
+          placeholder="加油量"
+          @change="onAmountChange"
+        />
+      </el-form-item>
+      <el-form-item label="机显总价 (¥)">
+        <el-input-number 
+          v-model="form.display_cost" 
+          :min="0" 
+          :precision="2" 
+          style="width: 100%" 
+          placeholder="机显金额（选填，可自动计算）"
+          @change="onDisplayCostChange"
+        />
+      </el-form-item>
+      
+      <!-- 实付金额 -->
+      <el-form-item label="实付金额 (¥)">
+        <el-input-number v-model="form.actual_cost" :min="0" :precision="2" style="width: 100%" placeholder="实际支付金额（优惠后）" />
+        <div class="hint">用于统计实际花费，不填则使用机显总价</div>
+      </el-form-item>
+      
+      <el-form-item label="是否加满">
+        <el-switch v-model="form.is_full_tank" active-text="是" inactive-text="否" />
+      </el-form-item>
+      <el-form-item label="备注">
+        <el-input v-model="form.notes" type="textarea" rows="2" placeholder="备注（可选）" />
+      </el-form-item>
+    </el-form>
+    <template #footer>
+      <el-button @click="visible = false">取消</el-button>
+      <el-button type="danger" @click="deleteRecord" :loading="deleting">删除</el-button>
+      <el-button type="primary" @click="submit" :loading="loading">保存</el-button>
+    </template>
+  </el-dialog>
+</template>
+
+<script setup>
+import { ref, computed, watch } from 'vue'
+import axios from 'axios'
+import { ElMessage, ElMessageBox } from 'element-plus'
+
+const props = defineProps(['visible', 'record'])
+const emit = defineEmits(['update:visible', 'success'])
+
+const API_BASE = 'https://api.yuany3721.site/carcost'
+
+const visible = computed({
+  get: () => props.visible,
+  set: (val) => emit('update:visible', val)
+})
+
+const loading = ref(false)
+const deleting = ref(false)
+
+const form = ref({
+  id: null,
+  date: '',
+  mileage: 0,
+  fuel_amount: null,
+  fuel_price: null,
+  display_cost: null,
+  actual_cost: null,
+  is_full_tank: true,
+  notes: ''
+})
+
+// 当 record 变化时更新表单
+watch(() => props.record, (newRecord) => {
+  if (newRecord) {
+    form.value = {
+      id: newRecord.id,
+      date: newRecord.date,
+      mileage: newRecord.mileage,
+      fuel_amount: newRecord.fuel_amount,
+      fuel_price: newRecord.fuel_price,
+      display_cost: newRecord.total_cost, // 显示用
+      actual_cost: newRecord.total_cost,  // 实付金额默认等于总价
+      is_full_tank: newRecord.is_full_tank,
+      notes: newRecord.notes || ''
+    }
+  }
+}, { immediate: true })
+
+// 单价变化：如果加油量有值，重新计算总价
+const onPriceChange = () => {
+  if (form.value.fuel_price && form.value.fuel_amount) {
+    form.value.display_cost = Math.round(form.value.fuel_price * form.value.fuel_amount * 100) / 100
+  }
+}
+
+// 加油量变化
+const onAmountChange = () => {
+  if (form.value.fuel_amount && form.value.fuel_price) {
+    form.value.display_cost = Math.round(form.value.fuel_price * form.value.fuel_amount * 100) / 100
+  } else if (form.value.fuel_amount && form.value.display_cost) {
+    form.value.fuel_price = Math.round(form.value.display_cost / form.value.fuel_amount * 100) / 100
+  }
+}
+
+// 总价变化
+const onDisplayCostChange = () => {
+  if (form.value.display_cost && form.value.fuel_price) {
+    form.value.fuel_amount = Math.round(form.value.display_cost / form.value.fuel_price * 100) / 100
+  } else if (form.value.display_cost && form.value.fuel_amount) {
+    form.value.fuel_price = Math.round(form.value.display_cost / form.value.fuel_amount * 100) / 100
+  }
+}
+
+const submit = async () => {
+  if (!form.value.id) {
+    ElMessage.error('记录ID不存在')
+    return
+  }
+  if (!form.value.date || !form.value.mileage) {
+    ElMessage.warning('请填写日期和里程')
+    return
+  }
+  
+  // 检查单价和加油量
+  const hasPrice = form.value.fuel_price !== null && form.value.fuel_price > 0
+  const hasAmount = form.value.fuel_amount !== null && form.value.fuel_amount > 0
+  
+  if (!hasPrice || !hasAmount) {
+    ElMessage.warning('请填写单价和加油量')
+    return
+  }
+  
+  // 如果机显总价为空，自动计算
+  let displayCost = form.value.display_cost
+  if (!displayCost || displayCost <= 0) {
+    displayCost = Math.round(form.value.fuel_price * form.value.fuel_amount * 100) / 100
+  }
+  
+  // 实付金额默认使用机显总价
+  const totalCost = form.value.actual_cost !== null && form.value.actual_cost > 0 
+    ? form.value.actual_cost 
+    : displayCost
+  
+  loading.value = true
+  try {
+    await axios.post(`${API_BASE}/fuel-records/update`, {
+      id: form.value.id,
+      date: form.value.date,
+      mileage: form.value.mileage,
+      fuel_amount: form.value.fuel_amount,
+      fuel_price: form.value.fuel_price,
+      total_cost: totalCost,
+      is_full_tank: form.value.is_full_tank,
+      notes: form.value.notes
+    })
+    ElMessage.success('保存成功')
+    visible.value = false
+    emit('success')
+  } catch (error) {
+    ElMessage.error('保存失败')
+  } finally {
+    loading.value = false
+  }
+}
+
+const deleteRecord = async () => {
+  if (!form.value.id) return
+  
+  try {
+    await ElMessageBox.confirm('确定要删除这条记录吗？', '提示', {
+      confirmButtonText: '确定',
+      cancelButtonText: '取消',
+      type: 'warning'
+    })
+    
+    deleting.value = true
+    await axios.post(`${API_BASE}/fuel-records/delete`, {
+      id: form.value.id
+    })
+    ElMessage.success('删除成功')
+    visible.value = false
+    emit('success')
+  } catch (error) {
+    if (error !== 'cancel') {
+      ElMessage.error('删除失败')
+    }
+  } finally {
+    deleting.value = false
+  }
+}
+</script>
+
+<style scoped>
+.hint {
+  font-size: 12px;
+  color: #909399;
+  margin-top: 4px;
+}
+</style>
diff --git a/web/src/components/dialogs/vehicle/AddVehicleDialog.vue b/web/src/components/dialogs/vehicle/AddVehicleDialog.vue
new file mode 100644
index 0000000..58f78ba
--- /dev/null
+++ b/web/src/components/dialogs/vehicle/AddVehicleDialog.vue
@@ -0,0 +1,76 @@
+<template>
+  <el-dialog
+    v-model="visible"
+    title="添加车辆"
+    width="400px"
+  >
+    <el-form :model="form" label-width="80px">
+      <el-form-item label="车辆名称" required>
+        <el-input v-model="form.name" placeholder="例如：我的小车" />
+      </el-form-item>
+      <el-form-item label="购车日期">
+        <el-date-picker
+          v-model="form.purchase_date"
+          type="date"
+          placeholder="选择日期"
+          style="width: 100%"
+          value-format="YYYY-MM-DD"
+        />
+      </el-form-item>
+      <el-form-item label="初始里程">
+        <el-input-number v-model="form.initial_mileage" :min="0" style="width: 100%" />
+      </el-form-item>
+    </el-form>
+    <template #footer>
+      <el-button @click="visible = false">取消</el-button>
+      <el-button type="primary" @click="submit" :loading="loading">确定</el-button>
+    </template>
+  </el-dialog>
+</template>
+
+<script setup>
+import { ref, computed } from 'vue'
+import axios from 'axios'
+import { ElMessage } from 'element-plus'
+
+const props = defineProps(['visible'])
+const emit = defineEmits(['update:visible', 'success'])
+
+const API_BASE = 'https://api.yuany3721.site/carcost'
+
+const visible = computed({
+  get: () => props.visible,
+  set: (val) => emit('update:visible', val)
+})
+
+const loading = ref(false)
+const form = ref({
+  name: '',
+  purchase_date: null,
+  initial_mileage: 0
+})
+
+const submit = async () => {
+  if (!form.value.name.trim()) {
+    ElMessage.warning('请输入车辆名称')
+    return
+  }
+  
+  loading.value = true
+  try {
+    await axios.post(`${API_BASE}/vehicles/create`, {
+      name: form.value.name,
+      purchase_date: form.value.purchase_date,
+      initial_mileage: form.value.initial_mileage
+    })
+    ElMessage.success('添加成功')
+    visible.value = false
+    form.value = { name: '', purchase_date: null, initial_mileage: 0 }
+    emit('success')
+  } catch (error) {
+    ElMessage.error('添加失败')
+  } finally {
+    loading.value = false
+  }
+}
+</script>
diff --git a/web/src/components/dialogs/vehicle/EditVehicleDialog.vue b/web/src/components/dialogs/vehicle/EditVehicleDialog.vue
new file mode 100644
index 0000000..b8c1c9b
--- /dev/null
+++ b/web/src/components/dialogs/vehicle/EditVehicleDialog.vue
@@ -0,0 +1,89 @@
+<template>
+  <el-dialog
+    v-model="visible"
+    title="编辑车辆"
+    width="400px"
+  >
+    <el-form :model="form" label-width="80px">
+      <el-form-item label="车辆名称" required>
+        <el-input v-model="form.name" placeholder="例如：我的小车" />
+      </el-form-item>
+      <el-form-item label="购车日期">
+        <el-date-picker
+          v-model="form.purchase_date"
+          type="date"
+          placeholder="选择日期"
+          style="width: 100%"
+          value-format="YYYY-MM-DD"
+        />
+      </el-form-item>
+      <el-form-item label="初始里程">
+        <el-input-number v-model="form.initial_mileage" :min="0" style="width: 100%" />
+      </el-form-item>
+    </el-form>
+    <template #footer>
+      <el-button @click="visible = false">取消</el-button>
+      <el-button type="primary" @click="submit" :loading="loading">保存</el-button>
+    </template>
+  </el-dialog>
+</template>
+
+<script setup>
+import { ref, computed, watch } from 'vue'
+import axios from 'axios'
+import { ElMessage } from 'element-plus'
+
+const props = defineProps(['visible', 'vehicle'])
+const emit = defineEmits(['update:visible', 'success'])
+
+const API_BASE = 'https://api.yuany3721.site/carcost'
+
+const visible = computed({
+  get: () => props.visible,
+  set: (val) => emit('update:visible', val)
+})
+
+const loading = ref(false)
+const form = ref({
+  id: null,
+  name: '',
+  purchase_date: null,
+  initial_mileage: 0
+})
+
+// 当 vehicle 变化时更新表单
+watch(() => props.vehicle, (newVehicle) => {
+  if (newVehicle) {
+    form.value = {
+      id: newVehicle.id,
+      name: newVehicle.name || '',
+      purchase_date: newVehicle.purchase_date,
+      initial_mileage: newVehicle.initial_mileage || 0
+    }
+  }
+}, { immediate: true })
+
+const submit = async () => {
+  if (!form.value.name.trim()) {
+    ElMessage.warning('请输入车辆名称')
+    return
+  }
+  
+  loading.value = true
+  try {
+    await axios.post(`${API_BASE}/vehicles/update`, {
+      id: form.value.id,
+      name: form.value.name,
+      purchase_date: form.value.purchase_date,
+      initial_mileage: form.value.initial_mileage
+    })
+    ElMessage.success('保存成功')
+    visible.value = false
+    emit('success')
+  } catch (error) {
+    ElMessage.error('保存失败')
+  } finally {
+    loading.value = false
+  }
+}
+</script>
diff --git a/web/src/components/panels/CostRecordsPanel.vue b/web/src/components/panels/CostRecordsPanel.vue
new file mode 100644
index 0000000..9f17096
--- /dev/null
+++ b/web/src/components/panels/CostRecordsPanel.vue
@@ -0,0 +1,584 @@
+<template>
+    <div class="cost-panel">
+        <el-card :body-style="{ padding: '0' }">
+            <!-- 费用记录面板 -->
+
+            <!-- 费用类型分布 -->
+            <div v-if="showCharts" class="chart-container">
+                <div class="chart-header">
+                    <div class="chart-title">费用类型分布</div>
+                    <el-radio-group v-model="costTimeRange" size="small">
+                        <el-radio-button value="past_year">最近一年</el-radio-button>
+                        <el-radio-button value="all">全部时间</el-radio-button>
+                    </el-radio-group>
+                </div>
+                <v-chart v-if="pieChartOption" :option="pieChartOption" autoresize style="height: 220px" />
+                <el-empty v-else description="暂无数据" :image-size="60" />
+            </div>
+
+            <!-- 月度费用统计 -->
+            <div v-if="showCharts" class="chart-container">
+                <div class="chart-header">
+                    <div class="chart-title">月度费用统计</div>
+                    <el-radio-group v-model="costTimeRange" size="small">
+                        <el-radio-button value="past_year">最近一年</el-radio-button>
+                        <el-radio-button value="all">全部时间</el-radio-button>
+                    </el-radio-group>
+                </div>
+                <v-chart v-if="monthlyChartOption" :option="monthlyChartOption" autoresize style="height: 200px" />
+                <el-empty v-else description="暂无数据" :image-size="60" />
+            </div>
+
+            <!-- 记录列表 -->
+            <div v-if="showList" class="table-container">
+                <el-table
+                    :data="filteredRecords"
+                    style="width: 100%"
+                    v-loading="loading"
+                    size="small"
+                    highlight-current-row
+                    @row-click="editRecord"
+                >
+                    <el-table-column prop="date" label="日期" width="100" />
+                    <el-table-column prop="type" label="类型" width="120">
+                        <template #header>
+                            <el-dropdown trigger="click">
+                                <span class="type-filter-header">
+                                    类型 {{ selectedTypes.length > 0 ? `(${selectedTypes.length})` : '' }}
+                                    <el-icon><ArrowDown /></el-icon>
+                                </span>
+                                <template #dropdown>
+                                    <el-dropdown-menu>
+                                        <el-dropdown-item v-for="type in allTypes" :key="type">
+                                            <el-checkbox v-model="typeFilters[type]">{{ type }}</el-checkbox>
+                                        </el-dropdown-item>
+                                        <el-dropdown-item divided @click="clearTypeFilter">
+                                            <span style="color: #909399;">清除筛选</span>
+                                        </el-dropdown-item>
+                                    </el-dropdown-menu>
+                                </template>
+                            </el-dropdown>
+                        </template>
+                        <template #default="scope">
+                            <el-tag :type="getTypeTag(scope.row.type)" size="small">{{ scope.row.type }}</el-tag>
+                        </template>
+                    </el-table-column>
+                    <el-table-column prop="amount" label="金额" width="80">
+                        <template #default="scope"> ¥{{ scope.row.amount?.toFixed(0) }} </template>
+                    </el-table-column>
+                    <el-table-column prop="notes" label="备注" show-overflow-tooltip />
+                </el-table>
+            </div>
+
+            <!-- 分页 -->
+            <el-pagination
+                v-if="showList"
+                v-model:current-page="currentPage"
+                v-model:page-size="pageSize"
+                :page-sizes="[10, 20, 50]"
+                :total="filteredTotal"
+                layout="total, prev, pager, next"
+                @current-change="handlePageChange"
+                style="margin-top: 15px; padding: 0 10px 10px"
+                size="small"
+            />
+        </el-card>
+
+        <EditCostDialog v-model:visible="showEditDialog" :record="selectedRecord" @success="loadRecords" />
+    </div>
+</template>
+
+<script setup>
+import { ref, watch, onMounted, computed } from "vue";
+import axios from "axios";
+import { ElMessage } from "element-plus";
+import { ArrowDown } from '@element-plus/icons-vue'
+import EditCostDialog from "../dialogs/cost/EditCostDialog.vue";
+
+const props = defineProps({
+    vehicleId: Number,
+    showCharts: {
+        type: Boolean,
+        default: true
+    },
+    showList: {
+        type: Boolean,
+        default: true
+    }
+});
+
+defineEmits(["add-cost"]);
+
+const API_BASE = "https://api.yuany3721.site/carcost";
+
+const loading = ref(false);
+const allRecords = ref([]);
+const fuelRecords = ref([]); // 加油记录，用于月度油费统计
+const total = ref(0);
+const currentPage = ref(1);
+const pageSize = ref(15);
+const showEditDialog = ref(false);
+const selectedRecord = ref(null);
+const selectedTypes = ref([]);
+const isMobile = ref(window.innerWidth <= 768);
+const costTimeRange = ref('past_year'); // 'past_year' | 'all'
+
+// 类型筛选
+const typeFilters = ref({});
+const allTypes = ["保养", "维修", "保险", "停车", "过路费", "其他", "油费"];
+
+// 初始化类型筛选
+allTypes.forEach(type => {
+    typeFilters.value[type] = false;
+});
+
+// 监听类型筛选变化
+watch(typeFilters.value, () => {
+    selectedTypes.value = allTypes.filter(type => typeFilters.value[type]);
+    currentPage.value = 1;
+}, { deep: true });
+
+const clearTypeFilter = () => {
+    allTypes.forEach(type => {
+        typeFilters.value[type] = false;
+    });
+    selectedTypes.value = [];
+};
+
+// 监听窗口大小变化
+const updateIsMobile = () => {
+    isMobile.value = window.innerWidth <= 768;
+};
+window.addEventListener("resize", updateIsMobile);
+onMounted(() => {
+    updateIsMobile();
+});
+
+const typeTagMap = {
+    保养: "success",
+    维修: "warning",
+    保险: "danger",
+    停车: "info",
+    过路费: "primary",
+    其他: "info",
+};
+
+const typeColorMap = {
+    保养: "#67c23a",    // 绿色
+    维修: "#e6a23c",    // 橙色
+    保险: "#f56c6c",    // 红色
+    停车: "#909399",    // 灰色
+    过路费: "#9a60b4",  // 紫色（改为紫色，区别于油费）
+    其他: "#fc8452",    // 珊瑚色（改为橙色系的珊瑚色）
+    油费: "#409eff",    // 蓝色
+};
+
+const getTypeTag = (type) => typeTagMap[type] || "";
+
+// 获取N个月前的日期
+const getMonthsAgo = (months) => {
+    const now = new Date();
+    return new Date(now.getFullYear(), now.getMonth() - months, now.getDate());
+};
+
+// 计算费用分摊明细表
+const costInstallments = computed(() => {
+    const installments = []
+    
+    allRecords.value.forEach(cost => {
+        if (cost.is_installment && cost.installment_months > 1) {
+            // 分摊费用，生成多条记录
+            const monthlyAmount = cost.amount / cost.installment_months
+            const startMonth = cost.date.slice(0, 7)
+            
+            for (let i = 0; i < cost.installment_months; i++) {
+                const month = getNextMonth(startMonth, i)
+                installments.push({
+                    month: month,
+                    type: cost.type,
+                    amount: monthlyAmount,
+                    originalCostId: cost.id
+                })
+            }
+        } else {
+            // 一次性费用，生成一条记录
+            installments.push({
+                month: cost.date.slice(0, 7),
+                type: cost.type,
+                amount: cost.amount,
+                originalCostId: cost.id
+            })
+        }
+    })
+    
+    return installments
+})
+
+// 费用类型分布 - 环形图
+const pieChartOption = computed(() => {
+    if (!allRecords.value.length && !fuelRecords.value.length) return null;
+
+    // 计算时间范围
+    const now = new Date();
+    const currentMonth = `${now.getFullYear()}-${String(now.getMonth() + 1).padStart(2, '0')}`;
+    
+    // 确定筛选的月份范围
+    let targetMonths = [];
+    if (costTimeRange.value === 'past_6months') {
+        // 近6个月：从当前月往前推5个月（共6个月）
+        for (let i = 5; i >= 0; i--) {
+            const d = new Date(now.getFullYear(), now.getMonth() - i, 1);
+            targetMonths.push(`${d.getFullYear()}-${String(d.getMonth() + 1).padStart(2, '0')}`);
+        }
+    } else if (costTimeRange.value === 'past_year') {
+        // 近一年：从当前月往前推11个月（共12个月）
+        for (let i = 11; i >= 0; i--) {
+            const d = new Date(now.getFullYear(), now.getMonth() - i, 1);
+            targetMonths.push(`${d.getFullYear()}-${String(d.getMonth() + 1).padStart(2, '0')}`);
+        }
+    }
+    // "全部"模式下不过滤月份
+    
+    // 筛选油费记录
+    let filteredFuelRecords = fuelRecords.value;
+    if (costTimeRange.value !== 'all') {
+        const cutoffDate = getMonthsAgo(costTimeRange.value === 'past_6months' ? 6 : 12).toISOString().slice(0, 10);
+        filteredFuelRecords = fuelRecords.value.filter(r => r.date >= cutoffDate);
+    }
+
+    const typeData = {};
+    let totalAmount = 0;
+    
+    // 从分摊明细表中统计费用
+    costInstallments.value.forEach(item => {
+        if (costTimeRange.value === 'all' || targetMonths.includes(item.month)) {
+            typeData[item.type] = (typeData[item.type] || 0) + item.amount;
+            totalAmount += item.amount;
+        }
+    });
+    
+    // 统计油费
+    let totalFuelCost = 0;
+    filteredFuelRecords.forEach((r) => {
+        totalFuelCost += r.total_cost;
+    });
+    if (totalFuelCost > 0) {
+        typeData['油费'] = totalFuelCost;
+        totalAmount += totalFuelCost;
+    }
+
+    const data = Object.entries(typeData)
+        .map(([name, value]) => ({ name, value: parseFloat(value.toFixed(0)) }))
+        .sort((a, b) => b.value - a.value);
+
+    if (data.length === 0) return null;
+
+    return {
+        tooltip: { trigger: "item", formatter: "{b}: ¥{c} ({d}%)" },
+        legend: {
+            orient: "vertical",
+            right: "5%",
+            top: "center",
+            itemWidth: 10,
+            itemHeight: 10,
+            textStyle: { fontSize: 10 },
+        },
+        series: [
+            {
+                type: "pie",
+                radius: ["45%", "70%"],
+                center: ["35%", "50%"],
+                avoidLabelOverlap: false,
+                itemStyle: { borderRadius: 5, borderColor: "#fff", borderWidth: 2 },
+                label: { show: false },
+                emphasis: { 
+                    label: { show: true, fontSize: 12, fontWeight: "bold" },
+                    scale: true,
+                    scaleSize: 5
+                },
+                data: data.map((d) => ({ ...d, itemStyle: { color: typeColorMap[d.name] || "#909399" } })),
+            },
+        ],
+        title: {
+            text: `¥${totalAmount.toFixed(0)}`,
+            left: '34.2%',
+            top: '46%',
+            textAlign: 'center',
+            textStyle: {
+                fontSize: 16,
+                color: '#303133',
+                fontWeight: 'bold'
+            }
+        }
+    };
+});
+
+// 辅助函数：获取下一个月
+const getNextMonth = (month) => {
+    const [year, mon] = month.split("-").map(Number);
+    if (mon === 12) return `${year + 1}-01`;
+    return `${year}-${String(mon + 1).padStart(2, "0")}`;
+};
+
+// 辅助函数：获取前N个月
+const getPrevMonths = (month, n) => {
+    const [year, mon] = month.split("-").map(Number);
+    let result = [];
+    for (let i = 0; i < n; i++) {
+        let targetMon = mon - i;
+        let targetYear = year;
+        while (targetMon <= 0) {
+            targetMon += 12;
+            targetYear--;
+        }
+        result.push(`${targetYear}-${String(targetMon).padStart(2, "0")}`);
+    }
+    return result.reverse();
+};
+
+// 月度费用统计
+const monthlyChartOption = computed(() => {
+    if (!allRecords.value.length && !fuelRecords.value.length) return null;
+
+    // 获取当前月份
+    const now = new Date();
+    const currentMonth = `${now.getFullYear()}-${String(now.getMonth() + 1).padStart(2, "0")}`;
+    
+    // 根据设备和时间范围决定显示月份
+    let targetMonths;
+    if (costTimeRange.value === 'past_year') {
+        const monthsToShow = isMobile.value ? 6 : 12;
+        targetMonths = getPrevMonths(currentMonth, monthsToShow);
+    } else {
+        // 全部时间：从分摊明细表中收集所有月份
+        const allMonths = new Set();
+        costInstallments.value.forEach(item => allMonths.add(item.month));
+        fuelRecords.value.forEach(r => allMonths.add(r.date.slice(0, 7)));
+        targetMonths = Array.from(allMonths).sort();
+    }
+    
+    if (targetMonths.length === 0) return null;
+
+    // 初始化月度数据
+    const monthlyData = {};
+    targetMonths.forEach((month) => {
+        monthlyData[month] = {};
+        allTypes.forEach((type) => {
+            monthlyData[month][type] = 0;
+        });
+    });
+
+    // 使用分摊明细表统计费用（只统计目标月份）
+    costInstallments.value.forEach(item => {
+        if (monthlyData[item.month]) {
+            monthlyData[item.month][item.type] += item.amount;
+        }
+    });
+
+    // 添加油费数据
+    fuelRecords.value.forEach((r) => {
+        const month = r.date.slice(0, 7);
+        if (monthlyData[month]) {
+            monthlyData[month]["油费"] += r.total_cost;
+        }
+    });
+
+    // 确定实际存在的类型（包括油费）
+    const existingTypes = allTypes.filter(type => {
+        return sortedMonths.some(month => monthlyData[month][type] > 0);
+    });
+
+    // 计算每月总费用用于显示标签
+    const monthlyTotals = sortedMonths.map(month => {
+        const total = existingTypes.reduce((sum, type) => sum + monthlyData[month][type], 0);
+        return total.toFixed(0);
+    });
+
+    return {
+        grid: { left: "3%", right: "3%", top: "15%", bottom: "15%", containLabel: true },
+        tooltip: {
+            trigger: "axis",
+            axisPointer: { type: "shadow" },
+            formatter: function (params) {
+                // 只显示有费用的类别
+                const validParams = params.filter((p) => p.value > 0);
+                if (validParams.length === 0) return "";
+
+                let html = `<div style="font-weight:bold;margin-bottom:5px;">${params[0].axisValue}</div>`;
+                validParams.forEach((p) => {
+                    html += `<div style="display:flex;align-items:center;margin:3px 0;">
+                        <span style="display:inline-block;width:10px;height:10px;background:${p.color};border-radius:50%;margin-right:5px;"></span>
+                        <span>${p.seriesName}: ¥${p.value.toFixed(0)}</span>
+                    </div>`;
+                });
+                const total = validParams.reduce((sum, p) => sum + p.value, 0);
+                html += `<div style="border-top:1px solid #ccc;margin-top:5px;padding-top:5px;font-weight:bold;">总计: ¥${total.toFixed(0)}</div>`;
+                return html;
+            },
+        },
+        legend: { top: "0%", textStyle: { fontSize: 9 }, itemWidth: 10, itemHeight: 10 },
+        xAxis: {
+            type: "category",
+            data: sortedMonths.map((m) => m.slice(5)),
+            axisLabel: { fontSize: 10 },
+            axisLine: { show: true },
+            axisTick: { show: false }
+        },
+        yAxis: { type: "value", show: false },
+        series: existingTypes.map((type, index) => ({
+            name: type,
+            type: "bar",
+            stack: "total",
+            data: sortedMonths.map((month) => parseFloat(monthlyData[month][type].toFixed(0))),
+            itemStyle: { 
+                color: typeColorMap[type] || "#909399",
+                borderRadius: index === existingTypes.length - 1 ? [4, 4, 0, 0] : [0, 0, 0, 0]
+            },
+            label: index === existingTypes.length - 1 ? {
+                show: true,
+                position: 'top',
+                fontSize: 9,
+                formatter: function(params) {
+                    return monthlyTotals[params.dataIndex];
+                },
+                color: '#606266'
+            } : undefined
+        })),
+    };
+});
+
+const filteredRecords = computed(() => {
+    let result = allRecords.value;
+    if (selectedTypes.value.length > 0) {
+        result = result.filter((r) => selectedTypes.value.includes(r.type));
+    }
+    const start = (currentPage.value - 1) * pageSize.value;
+    const end = start + pageSize.value;
+    return result.slice(start, end);
+});
+
+const filteredTotal = computed(() => {
+    if (selectedTypes.value.length > 0) {
+        return allRecords.value.filter((r) => selectedTypes.value.includes(r.type)).length;
+    }
+    return total.value;
+});
+
+const toggleType = (type) => {
+    const index = selectedTypes.value.indexOf(type);
+    if (index > -1) selectedTypes.value.splice(index, 1);
+    else selectedTypes.value.push(type);
+    currentPage.value = 1;
+};
+
+const clearFilter = () => {
+    selectedTypes.value = [];
+    currentPage.value = 1;
+};
+
+const editRecord = (record) => {
+    selectedRecord.value = record;
+    showEditDialog.value = true;
+};
+
+const handlePageChange = () => {
+    // 分页切换时不需要重新加载数据
+};
+
+const loadRecords = async () => {
+    if (!props.vehicleId) return;
+
+    loading.value = true;
+    try {
+        // 加载费用记录
+        const costRes = await axios.get(`${API_BASE}/costs/list?vehicle_id=${props.vehicleId}&limit=1000`);
+        allRecords.value = costRes.data || [];
+        total.value = allRecords.value.length;
+
+        // 加载加油记录（用于月度油费统计）
+        const fuelRes = await axios.get(`${API_BASE}/fuel-records/list?vehicle_id=${props.vehicleId}&limit=1000`);
+        fuelRecords.value = fuelRes.data || [];
+    } catch (error) {
+        ElMessage.error("加载费用记录失败");
+    } finally {
+        loading.value = false;
+    }
+};
+
+watch(() => props.vehicleId, () => {
+    currentPage.value = 1;
+    loadRecords();
+}, { immediate: true });
+
+onMounted(() => {
+    loadRecords();
+});
+</script>
+
+<style scoped>
+.cost-panel {
+    height: 100%;
+}
+
+.cost-panel :deep(.el-card) {
+    height: 100%;
+    display: flex;
+    flex-direction: column;
+}
+
+.cost-panel :deep(.el-card__body) {
+    flex: 1;
+    display: flex;
+    flex-direction: column;
+    overflow: hidden;
+}
+
+.panel-header {
+    display: flex;
+    justify-content: space-between;
+    align-items: center;
+    padding: 10px;
+}
+
+.chart-container {
+    padding: 10px;
+}
+
+.chart-container + .chart-container {
+    margin-top: -5px;
+}
+
+.chart-header {
+    display: flex;
+    justify-content: space-between;
+    align-items: center;
+    padding: 0 10px 10px 5px;
+}
+
+.chart-title {
+    font-size: 14px;
+    font-weight: bold;
+    color: #303133;
+}
+
+.table-container {
+    padding: 0 20px;
+    flex: 1;
+    overflow: auto;
+}
+
+.type-filter-header {
+    display: inline-flex;
+    align-items: center;
+    gap: 4px;
+    cursor: pointer;
+    font-size: 12px;
+    color: #606266;
+    font-weight: 500;
+    line-height: 23px;
+}
+
+.type-filter-header:hover {
+    color: #409eff;
+}
+</style>
diff --git a/web/src/components/panels/FuelRecordsPanel.vue b/web/src/components/panels/FuelRecordsPanel.vue
new file mode 100644
index 0000000..4be4f08
--- /dev/null
+++ b/web/src/components/panels/FuelRecordsPanel.vue
@@ -0,0 +1,386 @@
+<template>
+  <div class="fuel-panel">
+    <el-card :body-style="{ padding: '0' }">
+      <!-- 加油记录面板 -->
+      
+      <!-- 油耗趋势图 -->
+      <div v-if="showCharts" class="chart-container">
+        <div class="chart-header">
+          <div class="chart-title">油耗趋势</div>
+          <el-radio-group v-model="fuelTimeRange" size="small">
+            <el-radio-button value="past_year">过去一年</el-radio-button>
+            <el-radio-button value="all">全部时间</el-radio-button>
+          </el-radio-group>
+        </div>
+        <v-chart v-if="consumptionChartOption" :option="consumptionChartOption" autoresize style="height: 200px;" />
+        <el-empty v-else description="暂无数据" :image-size="60" />
+      </div>
+      
+      <!-- 月度油费图 -->
+      <div v-if="showCharts" class="chart-container">
+        <div class="chart-header">
+          <div class="chart-title">月度油费</div>
+        </div>
+        <v-chart v-if="monthlyCostChartOption" :option="monthlyCostChartOption" autoresize style="height: 180px;" />
+        <el-empty v-else description="暂无数据" :image-size="60" />
+      </div>
+      
+      <!-- 记录列表 -->
+      <div v-if="showList" class="table-container">
+        <el-table 
+          :data="records" 
+          style="width: 100%" 
+          v-loading="loading" 
+          size="small"
+          highlight-current-row
+          @row-click="editRecord"
+        >
+          <el-table-column prop="date" label="日期" width="100" />
+          <el-table-column prop="mileage" label="里程" width="80" />
+          <el-table-column prop="fuel_amount" label="油量" width="70" />
+          <el-table-column prop="total_cost" label="金额" width="80">
+            <template #default="scope">
+              ¥{{ scope.row.total_cost?.toFixed(0) }}
+            </template>
+          </el-table-column>
+          <el-table-column prop="fuel_consumption" label="油耗" width="70">
+            <template #default="scope">
+              {{ scope.row.fuel_consumption || '-' }}
+            </template>
+          </el-table-column>
+        </el-table>
+      </div>
+      
+      <!-- 分页 -->
+      <el-pagination
+        v-if="showList"
+        v-model:current-page="currentPage"
+        v-model:page-size="pageSize"
+        :page-sizes="[10, 20, 50]"
+        :total="total"
+        layout="total, prev, pager, next"
+        @current-change="loadRecords"
+        style="margin-top: 15px; padding: 0 10px 10px;"
+        size="small"
+      />
+    </el-card>
+    
+    <!-- 编辑弹窗 -->
+    <EditFuelDialog 
+      v-model:visible="showEditDialog" 
+      :record="selectedRecord"
+      @success="loadRecords"
+    />
+  </div>
+</template>
+
+<script setup>
+import { ref, watch, onMounted, computed } from 'vue'
+import axios from 'axios'
+import { ElMessage } from 'element-plus'
+import EditFuelDialog from '../dialogs/fuel/EditFuelDialog.vue'
+
+const props = defineProps({
+  vehicleId: Number,
+  showCharts: {
+    type: Boolean,
+    default: true
+  },
+  showList: {
+    type: Boolean,
+    default: true
+  }
+})
+
+defineEmits(['add-fuel'])
+
+const API_BASE = 'https://api.yuany3721.site/carcost'
+
+const loading = ref(false)
+const allRecords = ref([])
+const records = ref([])
+const total = ref(0)
+const currentPage = ref(1)
+const pageSize = ref(15)
+const showEditDialog = ref(false)
+const selectedRecord = ref(null)
+const fuelTimeRange = ref('past_year') // 'past_year' | 'all'
+
+// 获取一年前的日期
+const getOneYearAgo = () => {
+  const now = new Date()
+  return new Date(now.getFullYear() - 1, now.getMonth(), now.getDate())
+}
+
+// 获取筛选后的月份列表
+const getFilteredMonths = () => {
+  // 计算月度油费
+  const monthlyData = {}
+  allRecords.value.forEach(r => {
+    const month = r.date.slice(0, 7)
+    monthlyData[month] = (monthlyData[month] || 0) + r.total_cost
+  })
+  
+  // 获取所有月份（排序）
+  let sortedMonths = Object.keys(monthlyData).sort()
+  
+  // 根据时间范围筛选月份
+  if (fuelTimeRange.value === 'past_year') {
+    const oneYearAgo = getOneYearAgo()
+    const cutoffMonth = `${oneYearAgo.getFullYear()}-${String(oneYearAgo.getMonth() + 1).padStart(2, '0')}`
+    sortedMonths = sortedMonths.filter(m => m >= cutoffMonth)
+  }
+  
+  return { sortedMonths, monthlyData }
+}
+
+// 油耗趋势图 - X轴为里程数
+const consumptionChartOption = computed(() => {
+  if (!allRecords.value.length) return null
+  
+  // 根据时间范围筛选记录
+  let filteredRecords = allRecords.value.filter(r => r.fuel_consumption)
+  
+  if (fuelTimeRange.value === 'past_year') {
+    const oneYearAgo = getOneYearAgo()
+    const cutoffDate = oneYearAgo.toISOString().slice(0, 10)
+    filteredRecords = filteredRecords.filter(r => r.date >= cutoffDate)
+  }
+  
+  if (filteredRecords.length === 0) return null
+  
+  // 准备油耗数据：按里程排序，用于连线
+  const fuelConsumptionData = filteredRecords
+    .sort((a, b) => a.mileage - b.mileage)
+    .map(r => ({
+      value: [r.mileage, r.fuel_consumption],
+      date: r.date,
+      mileage: r.mileage,
+      fuelAmount: r.fuel_amount
+    }))
+  
+  if (fuelConsumptionData.length === 0) return null
+  
+  // 计算X轴范围，增加边距
+  const mileages = fuelConsumptionData.map(d => d.value[0])
+  const minMileage = Math.min(...mileages)
+  const maxMileage = Math.max(...mileages)
+  const mileageRange = maxMileage - minMileage
+  const padding = mileageRange * 0.05  // 5% 边距
+  
+  // 找出最高3个和最低3个油耗点
+  const sortedByConsumption = [...fuelConsumptionData].sort((a, b) => b.value[1] - a.value[1])
+  const top3 = sortedByConsumption.slice(0, 3)
+  const bottom3 = sortedByConsumption.slice(-3)
+  
+  // 构建 markPoint 数据
+  const markPointData = [
+    ...top3.map((d) => ({
+      coord: d.value,
+      value: d.value[1].toFixed(1),
+      itemStyle: { color: '#f56c6c' },
+      label: { color: '#f56c6c', position: 'top' }
+    })),
+    ...bottom3.map((d) => ({
+      coord: d.value,
+      value: d.value[1].toFixed(1),
+      itemStyle: { color: '#67c23a' },
+      label: { color: '#67c23a', position: 'bottom' }
+    }))
+  ]
+  
+  return {
+    grid: { left: '12%', right: '5%', top: '15%', bottom: '15%' },
+    xAxis: {
+      type: 'value',
+      name: 'km',
+      min: Math.floor(minMileage - padding),
+      max: Math.ceil(maxMileage + padding),
+      nameTextStyle: { fontSize: 9 },
+      axisLabel: { 
+        fontSize: 9
+      }
+    },
+    yAxis: {
+      type: 'value',
+      name: 'L/100km',
+      nameTextStyle: { fontSize: 9 },
+      axisLabel: { fontSize: 9 }
+    },
+    series: [{
+      type: 'line',
+      data: fuelConsumptionData.map(d => d.value),
+      smooth: true,
+      symbol: 'circle',
+      symbolSize: 6,
+      lineStyle: { color: '#409eff', width: 2 },
+      itemStyle: { color: '#409eff' },
+      areaStyle: {
+        color: {
+          type: 'linear',
+          x: 0, y: 0, x2: 0, y2: 1,
+          colorStops: [
+            { offset: 0, color: 'rgba(64, 158, 255, 0.3)' },
+            { offset: 1, color: 'rgba(64, 158, 255, 0.05)' }
+          ]
+        }
+      },
+      markPoint: {
+        data: markPointData,
+        symbol: 'circle',
+        symbolSize: 10,
+        itemStyle: { borderColor: '#fff', borderWidth: 2 },
+        label: { fontSize: 9, formatter: '{c}' }
+      },
+      markLine: {
+        silent: true,
+        symbol: 'none',
+        data: [
+          { type: 'average', name: '平均', label: { formatter: '{c}', fontSize: 8, position: 'insideEndTop' } }
+        ],
+        lineStyle: { color: '#909399', type: 'dashed', width: 1 }
+      }
+    }],
+    tooltip: {
+      trigger: 'item',
+      formatter: function(params) {
+        const data = fuelConsumptionData[params.dataIndex]
+        return `${data.date}<br/>里程: ${data.mileage}km<br/>加油: ${data.fuelAmount}L<br/>油耗: <b>${params.value[1]} L/100km</b>`
+      }
+    }
+  }
+})
+
+// 月度油费图
+const monthlyCostChartOption = computed(() => {
+  if (!allRecords.value.length) return null
+  
+  const { sortedMonths, monthlyData } = getFilteredMonths()
+  if (sortedMonths.length < 1) return null
+  
+  const chartData = sortedMonths.map(m => ({
+    month: m.slice(5),
+    value: monthlyData[m].toFixed(0)
+  }))
+  
+  return {
+    grid: { left: '5%', right: '5%', top: '15%', bottom: '15%', containLabel: true },
+    xAxis: {
+      type: 'category',
+      data: chartData.map(d => d.month),
+      axisLabel: { fontSize: 10 },
+      axisLine: { show: true },
+      axisTick: { show: false }
+    },
+    yAxis: {
+      type: 'value',
+      show: false
+    },
+    series: [{
+      type: 'bar',
+      data: chartData.map(d => d.value),
+      barWidth: '60%',
+      itemStyle: { 
+        color: 'rgba(103, 194, 58, 0.6)',
+        borderRadius: [4, 4, 0, 0]
+      },
+      label: {
+        show: true,
+        position: 'top',
+        fontSize: 9,
+        formatter: '{c}'
+      }
+    }],
+    tooltip: {
+      trigger: 'axis',
+      axisPointer: { type: 'shadow' }
+    }
+  }
+})
+
+const editRecord = (record) => {
+  selectedRecord.value = record
+  showEditDialog.value = true
+}
+
+const loadRecords = async () => {
+  if (!props.vehicleId) return
+  
+  loading.value = true
+  try {
+    const res = await axios.get(`${API_BASE}/fuel-records/list?vehicle_id=${props.vehicleId}&limit=1000`)
+    allRecords.value = res.data || []
+    total.value = allRecords.value.length
+    
+    const start = (currentPage.value - 1) * pageSize.value
+    const end = start + pageSize.value
+    records.value = allRecords.value.slice(start, end)
+  } catch (error) {
+    ElMessage.error('加载加油记录失败')
+  } finally {
+    loading.value = false
+  }
+}
+
+watch(() => props.vehicleId, () => {
+  currentPage.value = 1
+  loadRecords()
+}, { immediate: true })
+
+onMounted(() => {
+  loadRecords()
+})
+</script>
+
+<style scoped>
+.fuel-panel {
+  height: 100%;
+}
+
+.fuel-panel :deep(.el-card) {
+  height: 100%;
+  display: flex;
+  flex-direction: column;
+}
+
+.fuel-panel :deep(.el-card__body) {
+  flex: 1;
+  display: flex;
+  flex-direction: column;
+  overflow: hidden;
+}
+
+.panel-header {
+  display: flex;
+  justify-content: space-between;
+  align-items: center;
+  padding: 10px;
+}
+
+.chart-container {
+  padding: 10px;
+}
+
+.chart-container + .chart-container {
+  margin-top: -5px;
+}
+
+.chart-header {
+  display: flex;
+  justify-content: space-between;
+  align-items: center;
+  padding: 0 10px 10px 5px;
+}
+
+.chart-title {
+  font-size: 14px;
+  font-weight: bold;
+  color: #303133;
+}
+
+.table-container {
+  padding: 0 20px;
+  flex: 1;
+  overflow: auto;
+}
+</style>
\ No newline at end of file
diff --git a/web/src/main.js b/web/src/main.js
new file mode 100644
index 0000000..f545dae
--- /dev/null
+++ b/web/src/main.js
@@ -0,0 +1,17 @@
+import { createApp } from 'vue'
+import ElementPlus from 'element-plus'
+import 'element-plus/dist/index.css'
+import VueECharts from 'vue-echarts'
+import { use } from 'echarts/core'
+import { CanvasRenderer } from 'echarts/renderers'
+import { LineChart, BarChart, PieChart, ScatterChart } from 'echarts/charts'
+import { GridComponent, TooltipComponent, LegendComponent, TitleComponent, GraphicComponent, MarkPointComponent, MarkLineComponent } from 'echarts/components'
+import App from './App.vue'
+
+// 注册 ECharts 组件
+use([CanvasRenderer, LineChart, BarChart, PieChart, ScatterChart, GridComponent, TooltipComponent, LegendComponent, TitleComponent, GraphicComponent, MarkPointComponent, MarkLineComponent])
+
+const app = createApp(App)
+app.use(ElementPlus)
+app.component('v-chart', VueECharts)
+app.mount('#app')
diff --git a/web/src/style.css b/web/src/style.css
new file mode 100644
index 0000000..527d4fb
--- /dev/null
+++ b/web/src/style.css
@@ -0,0 +1,296 @@
+:root {
+  --text: #6b6375;
+  --text-h: #08060d;
+  --bg: #fff;
+  --border: #e5e4e7;
+  --code-bg: #f4f3ec;
+  --accent: #aa3bff;
+  --accent-bg: rgba(170, 59, 255, 0.1);
+  --accent-border: rgba(170, 59, 255, 0.5);
+  --social-bg: rgba(244, 243, 236, 0.5);
+  --shadow:
+    rgba(0, 0, 0, 0.1) 0 10px 15px -3px, rgba(0, 0, 0, 0.05) 0 4px 6px -2px;
+
+  --sans: system-ui, 'Segoe UI', Roboto, sans-serif;
+  --heading: system-ui, 'Segoe UI', Roboto, sans-serif;
+  --mono: ui-monospace, Consolas, monospace;
+
+  font: 18px/145% var(--sans);
+  letter-spacing: 0.18px;
+  color-scheme: light dark;
+  color: var(--text);
+  background: var(--bg);
+  font-synthesis: none;
+  text-rendering: optimizeLegibility;
+  -webkit-font-smoothing: antialiased;
+  -moz-osx-font-smoothing: grayscale;
+
+  @media (max-width: 1024px) {
+    font-size: 16px;
+  }
+}
+
+@media (prefers-color-scheme: dark) {
+  :root {
+    --text: #9ca3af;
+    --text-h: #f3f4f6;
+    --bg: #16171d;
+    --border: #2e303a;
+    --code-bg: #1f2028;
+    --accent: #c084fc;
+    --accent-bg: rgba(192, 132, 252, 0.15);
+    --accent-border: rgba(192, 132, 252, 0.5);
+    --social-bg: rgba(47, 48, 58, 0.5);
+    --shadow:
+      rgba(0, 0, 0, 0.4) 0 10px 15px -3px, rgba(0, 0, 0, 0.25) 0 4px 6px -2px;
+  }
+
+  #social .button-icon {
+    filter: invert(1) brightness(2);
+  }
+}
+
+body {
+  margin: 0;
+}
+
+h1,
+h2 {
+  font-family: var(--heading);
+  font-weight: 500;
+  color: var(--text-h);
+}
+
+h1 {
+  font-size: 56px;
+  letter-spacing: -1.68px;
+  margin: 32px 0;
+  @media (max-width: 1024px) {
+    font-size: 36px;
+    margin: 20px 0;
+  }
+}
+h2 {
+  font-size: 24px;
+  line-height: 118%;
+  letter-spacing: -0.24px;
+  margin: 0 0 8px;
+  @media (max-width: 1024px) {
+    font-size: 20px;
+  }
+}
+p {
+  margin: 0;
+}
+
+code,
+.counter {
+  font-family: var(--mono);
+  display: inline-flex;
+  border-radius: 4px;
+  color: var(--text-h);
+}
+
+code {
+  font-size: 15px;
+  line-height: 135%;
+  padding: 4px 8px;
+  background: var(--code-bg);
+}
+
+.counter {
+  font-size: 16px;
+  padding: 5px 10px;
+  border-radius: 5px;
+  color: var(--accent);
+  background: var(--accent-bg);
+  border: 2px solid transparent;
+  transition: border-color 0.3s;
+  margin-bottom: 24px;
+
+  &:hover {
+    border-color: var(--accent-border);
+  }
+  &:focus-visible {
+    outline: 2px solid var(--accent);
+    outline-offset: 2px;
+  }
+}
+
+.hero {
+  position: relative;
+
+  .base,
+  .framework,
+  .vite {
+    inset-inline: 0;
+    margin: 0 auto;
+  }
+
+  .base {
+    width: 170px;
+    position: relative;
+    z-index: 0;
+  }
+
+  .framework,
+  .vite {
+    position: absolute;
+  }
+
+  .framework {
+    z-index: 1;
+    top: 34px;
+    height: 28px;
+    transform: perspective(2000px) rotateZ(300deg) rotateX(44deg) rotateY(39deg)
+      scale(1.4);
+  }
+
+  .vite {
+    z-index: 0;
+    top: 107px;
+    height: 26px;
+    width: auto;
+    transform: perspective(2000px) rotateZ(300deg) rotateX(40deg) rotateY(39deg)
+      scale(0.8);
+  }
+}
+
+#app {
+  width: 1126px;
+  max-width: 100%;
+  margin: 0 auto;
+  text-align: center;
+  border-inline: 1px solid var(--border);
+  min-height: 100svh;
+  display: flex;
+  flex-direction: column;
+  box-sizing: border-box;
+}
+
+#center {
+  display: flex;
+  flex-direction: column;
+  gap: 25px;
+  place-content: center;
+  place-items: center;
+  flex-grow: 1;
+
+  @media (max-width: 1024px) {
+    padding: 32px 20px 24px;
+    gap: 18px;
+  }
+}
+
+#next-steps {
+  display: flex;
+  border-top: 1px solid var(--border);
+  text-align: left;
+
+  & > div {
+    flex: 1 1 0;
+    padding: 32px;
+    @media (max-width: 1024px) {
+      padding: 24px 20px;
+    }
+  }
+
+  .icon {
+    margin-bottom: 16px;
+    width: 22px;
+    height: 22px;
+  }
+
+  @media (max-width: 1024px) {
+    flex-direction: column;
+    text-align: center;
+  }
+}
+
+#docs {
+  border-right: 1px solid var(--border);
+
+  @media (max-width: 1024px) {
+    border-right: none;
+    border-bottom: 1px solid var(--border);
+  }
+}
+
+#next-steps ul {
+  list-style: none;
+  padding: 0;
+  display: flex;
+  gap: 8px;
+  margin: 32px 0 0;
+
+  .logo {
+    height: 18px;
+  }
+
+  a {
+    color: var(--text-h);
+    font-size: 16px;
+    border-radius: 6px;
+    background: var(--social-bg);
+    display: flex;
+    padding: 6px 12px;
+    align-items: center;
+    gap: 8px;
+    text-decoration: none;
+    transition: box-shadow 0.3s;
+
+    &:hover {
+      box-shadow: var(--shadow);
+    }
+    .button-icon {
+      height: 18px;
+      width: 18px;
+    }
+  }
+
+  @media (max-width: 1024px) {
+    margin-top: 20px;
+    flex-wrap: wrap;
+    justify-content: center;
+
+    li {
+      flex: 1 1 calc(50% - 8px);
+    }
+
+    a {
+      width: 100%;
+      justify-content: center;
+      box-sizing: border-box;
+    }
+  }
+}
+
+#spacer {
+  height: 88px;
+  border-top: 1px solid var(--border);
+  @media (max-width: 1024px) {
+    height: 48px;
+  }
+}
+
+.ticks {
+  position: relative;
+  width: 100%;
+
+  &::before,
+  &::after {
+    content: '';
+    position: absolute;
+    top: -4.5px;
+    border: 5px solid transparent;
+  }
+
+  &::before {
+    left: 0;
+    border-left-color: var(--border);
+  }
+  &::after {
+    right: 0;
+    border-right-color: var(--border);
+  }
+}
diff --git a/web/vite.config.js b/web/vite.config.js
new file mode 100644
index 0000000..3efa387
--- /dev/null
+++ b/web/vite.config.js
@@ -0,0 +1,10 @@
+import { defineConfig } from 'vite'
+import vue from '@vitejs/plugin-vue'
+
+// https://vite.dev/config/
+export default defineConfig({
+  plugins: [vue()],
+  server: {
+    allowedHosts: ['yuany3721.site', '.yuany3721.site']
+  }
+})