:root{--bg: #f3f4f6;--surface: #ffffff;--text: #111827;--muted: #6b7280;--border: #e5e7eb;--expense: #ef4444;--income: #22c55e;--primary: #3b82f6;--primary-dark: #2563eb;--radius: 12px;--shadow: 0 4px 6px -1px rgba(0, 0, 0, .1), 0 2px 4px -1px rgba(0, 0, 0, .06)}*{box-sizing:border-box}html,body{margin:0;padding:0;font-family:-apple-system,BlinkMacSystemFont,Segoe UI,PingFang SC,Microsoft YaHei,sans-serif;background:var(--bg);color:var(--text)}#app{min-height:100vh}.app{max-width:960px;margin:0 auto;padding:16px 16px 96px}.header{display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;gap:12px;margin-bottom:16px}.header h1{margin:0;font-size:1.5rem}.month-control{display:flex;align-items:center;gap:8px;background:var(--surface);border:1px solid var(--border);border-radius:var(--radius);padding:4px}.month-control button{background:transparent;border:none;font-size:1.25rem;width:32px;height:32px;border-radius:8px;cursor:pointer;color:var(--text)}.month-control button:hover{background:var(--bg)}.month-label{min-width:92px;text-align:center;font-weight:600}.grid-3{display:grid;grid-template-columns:repeat(3,1fr);gap:12px;margin-bottom:16px}.card{background:var(--surface);border-radius:var(--radius);padding:16px;box-shadow:var(--shadow);text-align:center}.card-title{font-size:.875rem;color:var(--muted);margin-bottom:8px}.card-value{font-size:1.375rem;font-weight:700}.card.expense .card-value{color:var(--expense)}.card.income .card-value,.card.balance.positive .card-value{color:var(--income)}.card.balance.negative .card-value{color:var(--expense)}.tabs{display:flex;gap:8px;margin-bottom:16px}.tabs button{flex:1;padding:10px;border:1px solid var(--border);background:var(--surface);border-radius:var(--radius);font-weight:600;cursor:pointer}.tabs button.active{background:var(--primary);color:#fff;border-color:var(--primary)}.main{background:var(--surface);border-radius:var(--radius);box-shadow:var(--shadow);padding:16px;min-height:320px}.toolbar{display:flex;flex-wrap:wrap;gap:8px;margin-bottom:16px}.btn{padding:8px 14px;border-radius:8px;border:1px solid var(--border);background:var(--surface);cursor:pointer;font-size:.875rem;font-weight:500}.btn:hover{opacity:.9}.btn.primary{background:var(--primary);color:#fff;border-color:var(--primary)}.btn.secondary{background:#eff6ff;color:var(--primary-dark);border-color:#bfdbfe}.btn.ghost{background:transparent;color:var(--muted);border-color:transparent}.btn.danger{color:var(--expense);border-color:#fecaca;background:#fef2f2}.btn.small{padding:4px 8px;font-size:.75rem}.empty{text-align:center;padding:48px 16px;color:var(--muted)}.transaction-list{list-style:none;margin:0;padding:0;display:grid;gap:10px}.transaction-item{border:1px solid var(--border);border-radius:10px;padding:12px;display:grid;gap:8px}.tx-meta{display:flex;gap:8px;align-items:center;font-size:.8rem;color:var(--muted)}.tx-type{padding:2px 6px;border-radius:4px;font-size:.75rem}.tx-type.expense{background:#fef2f2;color:var(--expense)}.tx-type.income{background:#f0fdf4;color:var(--income)}.tx-category{font-weight:600;color:var(--text)}.tx-body{display:flex;justify-content:space-between;align-items:center;gap:12px}.tx-note{flex:1;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.tx-amount{font-weight:700;font-size:1.1rem}.tx-amount.expense{color:var(--expense)}.tx-amount.income{color:var(--income)}.tx-actions{display:flex;gap:8px;justify-content:flex-end}.fab{position:fixed;right:20px;bottom:20px;padding:14px 22px;background:var(--primary);color:#fff;border:none;border-radius:999px;font-size:1rem;font-weight:600;box-shadow:var(--shadow);cursor:pointer;z-index:50}.fab:hover{background:var(--primary-dark)}.hidden-input{display:none}.modal-backdrop{position:fixed;top:0;right:0;bottom:0;left:0;background:#00000080;display:grid;place-items:center;padding:16px;z-index:100}.modal{background:var(--surface);border-radius:var(--radius);width:100%;max-width:420px;padding:24px;box-shadow:var(--shadow)}.modal h2{margin-top:0;margin-bottom:16px;font-size:1.25rem}.modal form>label{display:block;margin-bottom:14px;font-size:.875rem;font-weight:500}.modal input,.modal select{display:block;width:100%;margin-top:6px;padding:10px;border:1px solid var(--border);border-radius:8px;font-size:1rem;background:#fff}.radio-group{display:flex;gap:16px;margin-top:6px}.radio{display:flex;align-items:center;gap:6px;font-weight:400;cursor:pointer}.radio input{width:auto;margin:0}.modal-actions{display:flex;justify-content:flex-end;gap:10px;margin-top:20px}.chart-panel{display:grid;gap:16px}.chart-row{display:grid;grid-template-columns:repeat(2,1fr);gap:16px}.chart-card{background:#fafafa;border:1px solid var(--border);border-radius:var(--radius);padding:12px}.chart-card.wide{grid-column:1 / -1}.chart-wrap{position:relative;height:260px}.chart-wrap.tall{height:320px}@media (max-width: 640px){.grid-3,.chart-row{grid-template-columns:1fr}.header{flex-direction:column;align-items:flex-start}}