*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
:root {
  --primary: #409eff; --primary-dark: #3a8ee6; --primary-light: #66b1ff;
  --sidebar-bg: linear-gradient(180deg, #304156 0%, #2b3a4a 100%);
  --bg: #f0f2f5; --card: #fff; --text: #333; --text-secondary: #909399;
  --border: #ebeef5; --success: #67c23a; --warning: #e6a23c; --danger: #f56c6c;
  --info: #409eff; --radius: 4px; --shadow: 0 2px 12px rgba(0,0,0,.06);
}
html { font-size: 14px; }
body { font-family: 'Microsoft YaHei', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif; background: var(--bg); color: var(--text); line-height: 1.5; }
a { color: var(--primary); text-decoration: none; }
a:hover { color: var(--primary-dark); }

/* Layout */
.app { display: flex; min-height: 100vh; }
.sidebar { width: 200px; background: var(--sidebar-bg); color: #bfcbd9; flex-shrink: 0; position: fixed; top: 0; left: 0; bottom: 0; overflow-y: auto; z-index: 100; transition: width .3s; }
.sidebar::-webkit-scrollbar { width: 0; }
.sidebar .logo { height: 50px; display: flex; align-items: center; justify-content: center; font-size: 16px; font-weight: 700; color: #fff; background: rgba(0,0,0,.15); letter-spacing: 1px; }
.sidebar .logo img { height: 28px; margin-right: 8px; }
.sidebar .nav-group { padding: 0; }
.sidebar .nav-item { display: flex; align-items: center; padding: 12px 20px; color: #bfcbd9; font-size: 13px; cursor: pointer; transition: all .2s; border-left: 3px solid transparent; }
.sidebar .nav-item i { margin-right: 10px; font-size: 16px; width: 20px; text-align: center; }
.sidebar .nav-item:hover { color: #fff; background: rgba(255,255,255,.05); }
.sidebar .nav-item.active { color: #fff; background: rgba(64,158,255,.2); border-left-color: var(--primary); }
.main { margin-left: 200px; flex: 1; min-width: 0; display: flex; flex-direction: column; }

/* Top header */
.header { height: 50px; background: #fff; display: flex; align-items: center; justify-content: space-between; padding: 0 20px; box-shadow: 0 1px 4px rgba(0,0,0,.05); position: sticky; top: 0; z-index: 50; }
.header .tabs { display: flex; gap: 0; height: 100%; }
.header .tab-item { display: flex; align-items: center; padding: 0 16px; font-size: 12px; color: var(--text-secondary); cursor: pointer; border-bottom: 2px solid transparent; white-space: nowrap; }
.header .tab-item.active { color: var(--primary); border-bottom-color: var(--primary); }
.header .tab-item .tab-close { margin-left: 6px; font-size: 12px; color: #c0c4cc; cursor: pointer; border-radius: 50%; width: 16px; height: 16px; display: flex; align-items: center; justify-content: center; }
.header .tab-item .tab-close:hover { background: #f56c6c; color: #fff; }
.header .user-area { display: flex; align-items: center; gap: 12px; font-size: 13px; color: var(--text-secondary); }
.header .user-area .avatar { width: 32px; height: 32px; border-radius: 50%; background: var(--primary); color: #fff; display: flex; align-items: center; justify-content: center; font-size: 12px; font-weight: 600; }
.header .user-area .logout-btn { cursor: pointer; color: var(--text-secondary); font-size: 13px; padding: 4px 8px; border-radius: var(--radius); }
.header .user-area .logout-btn:hover { color: var(--danger); }

/* Page content */
.page-content { flex: 1; padding: 16px 20px; overflow-y: auto; }

/* Cards */
.card { background: var(--card); border-radius: var(--radius); box-shadow: var(--shadow); padding: 20px; margin-bottom: 16px; }
.card-title { font-size: 14px; font-weight: 600; margin-bottom: 16px; color: var(--text); padding-bottom: 12px; border-bottom: 1px solid var(--border); }

/* Stat cards */
.stat-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 16px; margin-bottom: 16px; }
.stat-card { background: var(--card); border-radius: var(--radius); box-shadow: var(--shadow); padding: 20px; position: relative; overflow: hidden; }
.stat-card .stat-header { display: flex; justify-content: space-between; align-items: center; margin-bottom: 8px; }
.stat-card .stat-label { font-size: 13px; color: var(--text-secondary); }
.stat-card .stat-tag { font-size: 11px; padding: 2px 8px; border-radius: 2px; background: #ecf5ff; color: var(--primary); }
.stat-card .stat-value { font-size: 28px; font-weight: 700; color: var(--text); margin-bottom: 8px; }
.stat-card .stat-value .unit { font-size: 14px; font-weight: 400; margin-left: 2px; color: var(--text-secondary); }
.stat-card .stat-footer { font-size: 12px; color: var(--text-secondary); display: flex; justify-content: space-between; }
.stat-card .stat-footer span { color: var(--text); font-weight: 500; }
.stat-card::after { content: ''; position: absolute; top: 0; right: 0; width: 4px; height: 100%; }
.stat-card.blue::after { background: var(--primary); }
.stat-card.green::after { background: var(--success); }
.stat-card.orange::after { background: var(--warning); }
.stat-card.red::after { background: var(--danger); }

/* Chart grid */
.chart-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 16px; margin-bottom: 16px; }
.chart-card { background: var(--card); border-radius: var(--radius); box-shadow: var(--shadow); padding: 16px; }
.chart-card .chart-title { font-size: 13px; font-weight: 600; color: var(--text); margin-bottom: 12px; }
.chart-card .chart-box { width: 100%; height: 220px; }

/* Finance card */
.finance-card { background: var(--card); border-radius: var(--radius); box-shadow: var(--shadow); padding: 20px; }
.finance-card .finance-title { font-size: 13px; font-weight: 600; margin-bottom: 12px; padding-bottom: 8px; border-bottom: 1px solid var(--border); }
.finance-card .finance-total { text-align: center; margin-bottom: 16px; }
.finance-card .finance-total .amount { font-size: 24px; font-weight: 700; color: var(--primary); }
.finance-card .finance-row { display: flex; justify-content: space-between; margin-bottom: 8px; font-size: 12px; }
.finance-card .finance-row .label { color: var(--text-secondary); }
.finance-card .finance-row .val { font-weight: 600; }
.finance-card .channels { display: grid; grid-template-columns: 1fr 1fr; gap: 12px; margin-top: 12px; padding-top: 12px; border-top: 1px solid var(--border); }
.finance-card .channel { text-align: center; }
.finance-card .channel .ch-title { font-size: 12px; font-weight: 600; margin-bottom: 6px; }
.finance-card .channel .ch-title.wechat { color: #67c23a; }
.finance-card .channel .ch-title.cash { color: #e6a23c; }
.finance-card .channel .ch-row { font-size: 11px; color: var(--text-secondary); margin-bottom: 2px; }
.finance-card .channel .ch-row span { color: var(--text); font-weight: 500; }

/* Tables */
.table-wrap { overflow-x: auto; }
table { width: 100%; border-collapse: collapse; font-size: 13px; }
th, td { padding: 10px 12px; text-align: left; border-bottom: 1px solid var(--border); }
th { background: #fafafa; font-weight: 600; color: var(--text-secondary); white-space: nowrap; font-size: 12px; }
tr:hover td { background: #f5f7fa; }

/* Buttons */
.btn { display: inline-flex; align-items: center; gap: 4px; padding: 8px 16px; border-radius: var(--radius); border: 1px solid transparent; cursor: pointer; font-size: 13px; font-weight: 500; transition: all .2s; line-height: 1; }
.btn-primary { background: var(--primary); color: #fff; border-color: var(--primary); }
.btn-primary:hover { background: var(--primary-dark); border-color: var(--primary-dark); }
.btn-success { background: var(--success); color: #fff; border-color: var(--success); }
.btn-success:hover { background: #85ce61; border-color: #85ce61; }
.btn-danger { background: var(--danger); color: #fff; border-color: var(--danger); }
.btn-danger:hover { background: #f78989; border-color: #f78989; }
.btn-warning { background: var(--warning); color: #fff; border-color: var(--warning); }
.btn-sm { padding: 5px 10px; font-size: 12px; }
.btn-outline { background: #fff; border: 1px solid #dcdfe6; color: #606266; }
.btn-outline:hover { border-color: var(--primary); color: var(--primary); background: #ecf5ff; }

/* Forms */
.form-group { margin-bottom: 14px; }
.form-group label { display: block; font-size: 13px; font-weight: 500; margin-bottom: 6px; color: #606266; }
.form-control { width: 100%; padding: 8px 12px; border: 1px solid #dcdfe6; border-radius: var(--radius); font-size: 13px; outline: none; transition: border .2s; color: var(--text); }
.form-control:focus { border-color: var(--primary); }
select.form-control { appearance: auto; }

/* Filter bar */
.filter-bar { display: flex; gap: 10px; align-items: center; flex-wrap: wrap; margin-bottom: 16px; }
.filter-bar .form-control { width: auto; min-width: 150px; }

/* Pagination */
.pagination { display: flex; align-items: center; justify-content: flex-end; gap: 8px; margin-top: 16px; font-size: 13px; }
.pagination button { padding: 5px 12px; border: 1px solid #dcdfe6; background: #fff; border-radius: var(--radius); cursor: pointer; font-size: 12px; color: #606266; }
.pagination button:hover:not(:disabled) { color: var(--primary); border-color: var(--primary); }
.pagination button:disabled { opacity: .4; cursor: default; }
.pagination .page-info { color: var(--text-secondary); font-size: 12px; }

/* Modal */
.modal-overlay { position: fixed; inset: 0; background: rgba(0,0,0,.5); display: flex; align-items: center; justify-content: center; z-index: 1000; }
.modal { background: #fff; border-radius: var(--radius); padding: 24px; min-width: 450px; max-width: 90vw; max-height: 85vh; overflow-y: auto; box-shadow: 0 8px 30px rgba(0,0,0,.15); }
.modal-title { font-size: 16px; font-weight: 600; margin-bottom: 20px; padding-bottom: 12px; border-bottom: 1px solid var(--border); }
.modal-actions { display: flex; gap: 10px; justify-content: flex-end; margin-top: 20px; padding-top: 12px; border-top: 1px solid var(--border); }

/* Badge */
.badge { display: inline-block; padding: 2px 8px; border-radius: 2px; font-size: 11px; font-weight: 500; }
.badge-success { background: #f0f9eb; color: #67c23a; border: 1px solid #e1f3d8; }
.badge-warning { background: #fdf6ec; color: #e6a23c; border: 1px solid #faecd8; }
.badge-danger { background: #fef0f0; color: #f56c6c; border: 1px solid #fde2e2; }
.badge-info { background: #ecf5ff; color: #409eff; border: 1px solid #d9ecff; }

/* Toast */
.toast-container { position: fixed; top: 20px; right: 20px; z-index: 9999; }
.toast { padding: 12px 20px; border-radius: var(--radius); color: #fff; font-size: 13px; margin-bottom: 8px; animation: slideIn .3s; box-shadow: 0 4px 12px rgba(0,0,0,.15); }
.toast-success { background: var(--success); }
.toast-error { background: var(--danger); }
@keyframes slideIn { from { transform: translateX(100%); opacity: 0; } to { transform: translateX(0); opacity: 1; } }

/* Login page */
.login-page { display: flex; align-items: center; justify-content: center; min-height: 100vh; background: linear-gradient(135deg, #3a7afe 0%, #6dd5ed 100%); }
.login-box { background: #fff; border-radius: 8px; padding: 40px 36px; width: 380px; box-shadow: 0 20px 60px rgba(0,0,0,.2); }
.login-box h1 { text-align: center; font-size: 20px; color: var(--text); margin-bottom: 6px; }
.login-box p { text-align: center; color: var(--text-secondary); margin-bottom: 28px; font-size: 13px; }
.login-box .form-control { padding: 10px 14px; font-size: 14px; }
.login-box .btn { width: 100%; padding: 11px; font-size: 15px; margin-top: 8px; justify-content: center; }

/* Footer */
.footer { text-align: center; padding: 12px; font-size: 12px; color: #c0c4cc; }

/* Responsive */
@media (max-width: 768px) {
  .sidebar { display: none; }
  .main { margin-left: 0; }
  .stat-grid { grid-template-columns: repeat(2, 1fr); }
  .chart-grid { grid-template-columns: 1fr; }
}