财务会计工作台

Build a single-page finance workbench as one self-contained HTML file with inline CSS (no build step, no external requests). Layout: fixed 200px left sidebar with brand, five nav items (Vouchers, Reimbursements, Invoices, Reports, Tax) and a user chip; top bar with page title, search input and avatar; main area with a 4-card KPI row (Revenue MTD ¥1.42M, Cost MTD ¥986k, Net margin 30.6%, Unreconciled 23), a voucher queue table (5 rows: date, summary, amount, account, status), a reimbursement approval list with approve buttons, a revenue-vs-budget comparison bar pair, and a tax deadline countdown card. Light neutral surface, 1px borders, rounded-2xl cards, system font, amber #d97706 as the only accent. All data hardcoded mock data. Width 1208px.