diff --git a/src/pages/Billing.tsx b/src/pages/Billing.tsx
index 3f0dcf1..05995d3 100644
--- a/src/pages/Billing.tsx
+++ b/src/pages/Billing.tsx
@@ -1,30 +1,149 @@
 import { useState } from 'react'
 import { useQuery, useQueryClient } from '@tanstack/react-query'
-import { Card, Row, Col, Statistic, Button, Tag, Space, Typography, App } from 'antd'
-import { DollarOutlined, ReloadOutlined, LinkOutlined } from '@ant-design/icons'
+import { Card, Row, Col, Statistic, Button, Tag, Space, Typography, App, Table, Modal, Form, Input, Select, DatePicker, InputNumber } from 'antd'
+import { DollarOutlined, ReloadOutlined, LinkOutlined, PlusOutlined, DeleteOutlined, EditOutlined } from '@ant-design/icons'
 import { getBilling, type BillingInfo } from '@/services/billing-api'
-const { Text } = Typography
-function BillingCard({ p }: { p: BillingInfo }) {
-  const color = p.status === 'ok' ? (parseFloat(p.balance) < 10 ? '#faad14' : '#52c41a') : '#999'
-  return (
-    <Card title={<Space><DollarOutlined />{p.name}<Tag color={p.status === 'ok' ? 'green' : 'default'}>{p.status === 'ok' ? '正常' : '未知'}</Tag></Space>}
-      extra={<Button type="link" size="small" icon={<LinkOutlined />} href={p.consoleUrl} target="_blank">控制台</Button>}>
-      <Statistic title="余额" value={p.balance} valueStyle={{ color, fontSize: 28 }} suffix={<Text type="secondary" style={{ fontSize: 14 }}>{p.currency}</Text>} />
-      <div style={{ marginTop: 8 }}><Text type="secondary" style={{ fontSize: 12 }}>模型: {p.model}</Text><br /><Text type="secondary" style={{ fontSize: 12 }}>{p.note}</Text></div>
-    </Card>
-  )
-}
+import { getCostSummary, createCost, updateCost, deleteCost, type CostSummary, type CostItem } from '@/services/costs-api'
+import dayjs from 'dayjs'
+
+const { Text, Title } = Typography
+
+// ── API ──
+
+const CATEGORIES = [
+  { label: '服务器', value: 'server' },
+  { label: '域名', value: 'domain' },
+  { label: '订阅', value: 'subscription' },
+  { label: 'API', value: 'api' },
+  { label: '其他', value: 'other' },
+]
+
 function BillingContent() {
-  const qc = useQueryClient(); const [refreshing, setRefreshing] = useState(false)
-  const { data } = useQuery({ queryKey: ['billing'], queryFn: getBilling, staleTime: 60_000 })
+  const { modal, message } = App.useApp()
+  const qc = useQueryClient()
+  const [refreshing, setRefreshing] = useState(false)
+  const [modalOpen, setModalOpen] = useState(false)
+  const [editing, setEditing] = useState<CostItem | null>(null)
+  const [form] = Form.useForm()
+
+  const { data: billing } = useQuery({ queryKey: ['billing'], queryFn: getBilling, staleTime: 60_000 })
+  const { data: costs } = useQuery({ queryKey: ['costs', 'summary'], queryFn: getCostSummary, staleTime: 30_000 })
+
+  const refresh = async () => { setRefreshing(true); await Promise.all([qc.invalidateQueries({ queryKey: ['billing'] }), qc.invalidateQueries({ queryKey: ['costs', 'summary'] })]); setTimeout(() => setRefreshing(false), 800) }
+
+  const saveCost = async (values: any) => {
+    const body = { ...values, purchaseDate: values.purchaseDate?.toISOString(), expiryDate: values.expiryDate?.toISOString() }
+    try {
+      if (editing) await updateCost(editing.id, body)
+      else await createCost(body)
+      message.success(editing ? '已更新' : '已添加')
+      setModalOpen(false); setEditing(null); form.resetFields(); qc.invalidateQueries({ queryKey: ['costs', 'summary'] })
+    } catch { message.error('操作失败') }
+  }
+
+  const deleteCost = (item: CostItem) => modal.confirm({
+    title: '删除费用', content: `确定删除「${item.name}」？`, okType: 'danger', okText: '删除',
+    onOk: async () => { await deleteCost(item.id); qc.invalidateQueries({ queryKey: ['costs', 'summary'] }) },
+  })
+
+  const openEdit = (item: CostItem) => { setEditing(item); form.setFieldsValue({ ...item, purchaseDate: dayjs(item.purchaseDate), expiryDate: item.expiryDate ? dayjs(item.expiryDate) : null }); setModalOpen(true) }
+
+  const providers = billing?.providers || []
+  const summary: CostSummary = costs || { totalMonthly: 0, totalYearly: 0, totalOneTime: 0, items: [], byMonth: [], expiringSoon: [] }
+
+  const monthColumns = [
+    { title: '月份', dataIndex: 'month', width: 100 },
+    { title: '项目', dataIndex: 'items', render: (items: { name: string; amount: number }[]) => items.map(i => <div key={i.name}>{i.name} <Text type="secondary">¥{i.amount}</Text></div>) },
+    { title: '合计', dataIndex: 'total', width: 100, render: (v: number) => <Text strong>¥{v.toLocaleString()}</Text> },
+  ]
+
+  const expiryColumns = [
+    { title: '项目', dataIndex: 'name', ellipsis: true },
+    { title: '剩余', dataIndex: 'daysLeft', width: 80, render: (d: number) => <Tag color={d <= 7 ? 'red' : 'orange'}>{d}天</Tag> },
+    { title: '到期', dataIndex: 'expiryDate', width: 100, render: (d: string) => d ? dayjs(d).format('MM-DD') : '-' },
+    { title: '金额', dataIndex: 'amount', width: 80, render: (v: number) => `¥${v}` },
+  ]
+
   return (
     <div>
       <div style={{ display: 'flex', justifyContent: 'space-between', alignItems: 'center', marginBottom: 16 }}>
-        <Typography.Title level={5} style={{ margin: 0 }}><DollarOutlined /> API 用量</Typography.Title>
-        <Button icon={<ReloadOutlined spin={refreshing} />} onClick={async () => { setRefreshing(true); await qc.invalidateQueries({ queryKey: ['billing'] }); setTimeout(() => setRefreshing(false), 800) }} loading={refreshing}>刷新</Button>
+        <Title level={5} style={{ margin: 0 }}><DollarOutlined /> 费用总览</Title>
+        <Space>
+          <Button icon={<PlusOutlined />} onClick={() => { setEditing(null); form.resetFields(); setModalOpen(true) }}>新增费用</Button>
+          <Button icon={<ReloadOutlined spin={refreshing} />} onClick={refresh} loading={refreshing}>刷新</Button>
+        </Space>
       </div>
-      <Row gutter={[16, 16]}>{(data?.providers || []).map(p => <Col xs={24} sm={12} lg={6} key={p.name}><BillingCard p={p} /></Col>)}</Row>
+
+      {/* API 卡片 */}
+      <Row gutter={[16, 16]} style={{ marginBottom: 16 }}>
+        {providers.map((p: BillingInfo) => (
+          <Col xs={24} sm={12} lg={6} key={p.name}>
+            <Card size="small" title={<Space><DollarOutlined />{p.name}<Tag color={p.status === 'ok' ? 'green' : 'default'}>{p.status === 'ok' ? '正常' : '未知'}</Tag></Space>}
+              extra={<Button type="link" size="small" href={p.consoleUrl} target="_blank"><LinkOutlined /></Button>}>
+              <Statistic title="余额" value={p.balance} valueStyle={{ color: p.status === 'ok' ? '#52c41a' : '#999', fontSize: 22 }} suffix={p.currency} />
+            </Card>
+          </Col>
+        ))}
+      </Row>
+
+      {/* 统计数字 */}
+      <Row gutter={[16, 16]} style={{ marginBottom: 16 }}>
+        <Col xs={8}><Card size="small"><Statistic title="预估月费" prefix="¥" value={summary.totalMonthly} precision={0} /></Card></Col>
+        <Col xs={8}><Card size="small"><Statistic title="年费" prefix="¥" value={summary.totalYearly} precision={0} /></Card></Col>
+        <Col xs={8}><Card size="small"><Statistic title="一次性" prefix="¥" value={summary.totalOneTime} precision={0} /></Card></Col>
+      </Row>
+
+      {/* 自定义费用卡片 */}
+      <Title level={5} style={{ fontSize: 14, marginBottom: 8 }}>费用明细</Title>
+      <Row gutter={[16, 16]} style={{ marginBottom: 16 }}>
+        {summary.items.map((item: CostItem) => {
+          const daysLeft = item.expiryDate ? Math.ceil((new Date(item.expiryDate).getTime() - Date.now()) / 86400000) : null
+          const isExpired = daysLeft !== null && daysLeft <= 0
+          return (
+            <Col xs={24} sm={12} lg={6} key={item.id}>
+              <Card size="small" title={item.name}
+                extra={
+                  <Space size={4}>
+                    <Button type="text" size="small" icon={<EditOutlined />} onClick={() => openEdit(item)} />
+                    <Button type="text" size="small" danger icon={<DeleteOutlined />} onClick={() => deleteCost(item)} />
+                  </Space>
+                }>
+                <Statistic title="金额" prefix="¥" value={item.amount} precision={0} valueStyle={{ fontSize: 20 }} />
+                <div style={{ marginTop: 4 }}>
+                  <Tag color="blue">{CATEGORIES.find(c => c.value === item.category)?.label || item.category}</Tag>
+                  <Tag>{item.billingCycle === 'monthly' ? '月付' : item.billingCycle === 'yearly' ? '年付' : '一次性'}</Tag>
+                  {item.expiryDate && <Tag color={isExpired ? 'red' : (daysLeft && daysLeft <= 30 ? 'orange' : 'green')}>{isExpired ? '已过期' : `${daysLeft}天后到期`}</Tag>}
+                </div>
+              </Card>
+            </Col>
+          )
+        })}
+      </Row>
+
+      {/* 到期提醒 + 月度汇总 */}
+      <Row gutter={[16, 16]}>
+        <Col xs={24} lg={12}>
+          <Card size="small" title="即将到期"><Table dataSource={summary.expiringSoon} columns={expiryColumns} rowKey="id" size="small" pagination={false} locale={{ emptyText: '暂无即将到期的费用' }} /></Card>
+        </Col>
+        <Col xs={24} lg={12}>
+          <Card size="small" title="月度支出"><Table dataSource={summary.byMonth} columns={monthColumns} rowKey="month" size="small" pagination={false} /></Card>
+        </Col>
+      </Row>
+
+      {/* Add/Edit Modal */}
+      <Modal title={editing ? '编辑费用' : '新增费用'} open={modalOpen} onCancel={() => { setModalOpen(false); setEditing(null) }} onOk={() => form.submit()} okText="保存">
+        <Form form={form} layout="vertical" onFinish={saveCost}>
+          <Form.Item name="name" label="名称" rules={[{ required: true }]}><Input /></Form.Item>
+          <Form.Item name="category" label="分类" initialValue="other"><Select options={CATEGORIES} /></Form.Item>
+          <Form.Item name="amount" label="金额" rules={[{ required: true }]}><InputNumber min={0} prefix="¥" style={{ width: '100%' }} /></Form.Item>
+          <Form.Item name="billingCycle" label="计费周期" initialValue="once"><Select options={[{ label: '一次性', value: 'once' }, { label: '月付', value: 'monthly' }, { label: '年付', value: 'yearly' }]} /></Form.Item>
+          <Form.Item name="purchaseDate" label="购买日期" rules={[{ required: true }]}><DatePicker style={{ width: '100%' }} /></Form.Item>
+          <Form.Item name="expiryDate" label="到期日期"><DatePicker style={{ width: '100%' }} /></Form.Item>
+          <Form.Item name="note" label="备注"><Input.TextArea rows={2} /></Form.Item>
+        </Form>
+      </Modal>
     </div>
   )
 }
+
 export default function BillingPage() { return <App><BillingContent /></App> }
diff --git a/src/services/costs-api.ts b/src/services/costs-api.ts
new file mode 100644
index 0000000..ef9a1b8
--- /dev/null
+++ b/src/services/costs-api.ts
@@ -0,0 +1,10 @@
+import { api } from './http-client'
+
+export interface CostItem { id: string; name: string; category: string; amount: number; currency: string; purchaseDate: string; expiryDate: string | null; billingCycle: string; note: string | null }
+export interface CostSummary { totalMonthly: number; totalYearly: number; totalOneTime: number; items: CostItem[]; byMonth: { month: string; total: number; items: { name: string; amount: number }[] }[]; expiringSoon: (CostItem & { daysLeft: number })[] }
+
+export function getCostSummary(): Promise<CostSummary> { return api.get('/admin-api/costs/summary') }
+export function listCosts(): Promise<CostItem[]> { return api.get('/admin-api/costs') }
+export function createCost(data: Omit<CostItem, 'id' | 'currency'> & { currency?: string }): Promise<CostItem> { return api.post('/admin-api/costs', data) }
+export function updateCost(id: string, data: Partial<CostItem>): Promise<CostItem> { return api.patch(`/admin-api/costs/${id}`, data) }
+export function deleteCost(id: string): Promise<void> { return api.delete(`/admin-api/costs/${id}`) }