后台管理深色仪表盘

生成一张 1024x1280 像素、4:5 竖版深色后台管理仪表盘截图。左侧导航为中文：「总览」「用户」「订单」「分析」「设置」。顶部标题「Overview 后台」。指标卡显示「总收入 ￥124万」「活跃用户 8402」「待处理订单 317」「流失率 2.4%」。中心折线图标题「本周趋势」，右侧订单表格列名「订单号」「客户」「金额」「状态」，状态为「成功」「待处理」「失败」。底部接口状态可显示「200 OK」作为技术状态码。禁止英文导航、美元符号、真实平台标志、水印或乱码。

A pixel-perfect desktop browser mockup of a back-office admin dashboard in dark mode. Centered full-bleed layout at 1440 px wide. A collapsible left sidebar shows navigation icons and labels: "Overview", "Users", "Orders", "Analytics", "Settings"; active item highlighted in electric indigo. The main area contains a top stats bar with four KPI cards — "Total Revenue $1.24M", "Active Users 8,402", "Pending Orders 317", "Churn Rate 2.1%" — each card uses a subtle gradient background and a small sparkline chart. Below, a data table lists recent orders with columns: Order ID, Customer, Amount, Status (pill badges: green "Completed", amber "Pending", red "Failed"), and an action column with icon buttons. Upper right shows an avatar, notification bell with a red badge "9", and a global search bar. Color palette: near-black #0F1117 surface, #1E2130 card backgrounds, electric indigo #5C6BFF accents, white text. Typography is a geometric sans-serif. Thin 1 px grid lines separate table rows. Subtle box-shadow depth on cards. No lorem ipsum — all text is realistic dummy data.