:root {
      --primary: #2563eb;
      --primary-light: #3b82f6;
      --primary-dark: #1d4ed8;
      --success: #10b981;
      --warning: #f59e0b;
      --danger: #ef4444;
      --bg-page: #f8fafc;
      --bg-card: #ffffff;
      --bg-sidebar: #1e293b;
      --bg-sidebar-light: #334155;
      --text-primary: #1e293b;
      --text-secondary: #64748b;
      --text-muted: #94a3b8;
      --border: #e2e8f0;
      --shadow-sm: 0 1px 2px rgba(0,0,0,0.05);
      --shadow: 0 4px 6px -1px rgba(0,0,0,0.1), 0 2px 4px -1px rgba(0,0,0,0.06);
      --shadow-lg: 0 10px 15px -3px rgba(0,0,0,0.1), 0 4px 6px -2px rgba(0,0,0,0.05);
      --radius: 12px;
      --radius-sm: 8px;
      --radius-lg: 16px;
    }

    * { margin: 0; padding: 0; box-sizing: border-box; }

    body {
      font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
      background: var(--bg-page);
      color: var(--text-primary);
      min-height: 100vh;
    }

    /* 登录页样式 */
    .login-page {
      min-height: 100vh;
      display: flex;
      align-items: center;
      justify-content: center;
      background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    }

    .login-box {
      background: white;
      padding: 40px;
      border-radius: var(--radius-lg);
      box-shadow: 0 20px 60px rgba(0,0,0,0.3);
      width: 400px;
    }

    .login-box h1 {
      text-align: center;
      margin-bottom: 10px;
      color: var(--text-primary);
      font-size: 24px;
    }

    .login-box .subtitle {
      text-align: center;
      color: var(--text-muted);
      margin-bottom: 30px;
      font-size: 14px;
    }

    .login-form .form-group {
      margin-bottom: 20px;
    }

    .login-form input {
      width: 100%;
      padding: 14px 16px;
      border: 1px solid var(--border);
      border-radius: var(--radius-sm);
      font-size: 15px;
      transition: border-color 0.2s, box-shadow 0.2s;
      font-family: inherit;
    }

    .login-form input:focus {
      outline: none;
      border-color: var(--primary);
      box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.1);
    }

    .login-form button {
      width: 100%;
      padding: 14px;
      background: var(--primary);
      color: white;
      border: none;
      border-radius: var(--radius-sm);
      font-size: 16px;
      font-weight: 500;
      cursor: pointer;
      transition: background 0.2s;
    }

    .login-form button:hover {
      background: var(--primary-dark);
    }

    .login-error {
      color: var(--danger);
      margin-top: 10px;
      text-align: center;
      font-size: 14px;
    }

    /* 侧边栏底部用户信息 */
    .sidebar-footer {
      padding: 16px;
      border-top: 1px solid rgba(255,255,255,0.1);
    }

    .user-info {
      display: flex;
      align-items: center;
      justify-content: space-between;
    }

    .user-info-left {
      display: flex;
      align-items: center;
      gap: 10px;
    }

    .user-avatar {
      width: 36px;
      height: 36px;
      border-radius: 50%;
      background: var(--primary);
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 14px;
    }

    .user-name {
      font-size: 14px;
      color: var(--text-muted);
    }

    .user-role {
      font-size: 12px;
      color: var(--text-muted);
    }

    .logout-btn {
      background: transparent;
      border: none;
      color: var(--text-muted);
      cursor: pointer;
      padding: 8px;
      border-radius: var(--radius-sm);
      transition: all 0.2s;
    }

    .logout-btn:hover {
      background: rgba(255,255,255,0.1);
      color: #fff;
    }

    /* 布局 */
    .app-layout {
      display: flex;
      min-height: 100vh;
    }

    /* 侧边栏 */
    .sidebar {
      width: 260px;
      background: var(--bg-sidebar);
      color: #fff;
      display: flex;
      flex-direction: column;
      position: fixed;
      height: 100vh;
      z-index: 100;
    }

    .sidebar-header {
      padding: 24px;
      border-bottom: 1px solid rgba(255,255,255,0.1);
    }

    .sidebar-logo {
      display: flex;
      align-items: center;
      gap: 12px;
      font-size: 20px;
      font-weight: 600;
      color: #fff;
      text-decoration: none;
    }

    .sidebar-logo-icon {
      width: 40px;
      height: 40px;
      background: linear-gradient(135deg, #3b82f6, #8b5cf6);
      border-radius: var(--radius-sm);
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 18px;
    }

    .sidebar-nav {
      flex: 1;
      padding: 16px 12px;
    }

    .nav-item {
      margin-bottom: 4px;
    }

    .nav-link {
      display: flex;
      align-items: center;
      gap: 12px;
      padding: 14px 16px;
      color: #94a3b8;
      text-decoration: none;
      border-radius: var(--radius-sm);
      transition: all 0.2s ease;
      font-weight: 500;
      cursor: pointer;
    }

    .nav-link:hover {
      background: rgba(255,255,255,0.08);
      color: #fff;
    }

    .nav-link.active {
      background: var(--primary);
      color: #fff;
    }

    .nav-link i {
      width: 20px;
      text-align: center;
    }

    /* 主内容区 */
    .main-content {
      flex: 1;
      margin-left: 260px;
      min-height: 100vh;
    }

    /* 顶部栏 */
    .topbar {
      background: var(--bg-card);
      padding: 16px 32px;
      display: flex;
      justify-content: space-between;
      align-items: center;
      border-bottom: 1px solid var(--border);
      position: sticky;
      top: 0;
      z-index: 50;
    }

    .topbar-left {
      display: flex;
      align-items: center;
      gap: 16px;
    }

    .page-title {
      font-size: 24px;
      font-weight: 600;
      color: var(--text-primary);
    }

    .breadcrumb {
      display: flex;
      align-items: center;
      gap: 8px;
      font-size: 14px;
      color: var(--text-muted);
    }

    .breadcrumb a {
      color: var(--text-secondary);
      text-decoration: none;
    }

    .breadcrumb a:hover {
      color: var(--primary);
    }

    .ws-status {
      display: flex;
      align-items: center;
      gap: 8px;
      padding: 8px 16px;
      background: var(--bg-page);
      border-radius: 20px;
      font-size: 14px;
    }

    .user-info {
      display: flex;
      align-items: center;
      gap: 8px;
      padding: 8px 16px;
      background: var(--bg-page);
      border-radius: 20px;
      font-size: 14px;
      color: var(--text-secondary);
      cursor: pointer;
      transition: background 0.2s;
    }

    .user-info:hover {
      background: var(--border);
    }

    .user-info i {
      color: var(--primary);
    }

    .ws-dot {
      width: 8px;
      height: 8px;
      border-radius: 50%;
      background: var(--danger);
    }

    .ws-dot.connected {
      background: var(--success);
      box-shadow: 0 0 0 3px rgba(16, 185, 129, 0.2);
    }

    /* 内容区域 */
    .content {
      padding: 32px;
    }

    /* 月份选择器 */
    .month-selector {
      display: flex;
      align-items: center;
      gap: 12px;
      margin-bottom: 24px;
      background: var(--bg-card);
      padding: 16px 20px;
      border-radius: var(--radius);
      box-shadow: var(--shadow);
    }

    .month-selector label {
      font-size: 14px;
      color: var(--text-secondary);
    }

    .month-selector select {
      padding: 8px 16px;
      border: 1px solid var(--border);
      border-radius: var(--radius-sm);
      font-size: 14px;
      cursor: pointer;
      font-family: inherit;
    }

    /* 统计卡片 */
    .stats-grid {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 24px;
      margin-bottom: 32px;
    }

    .stat-card {
      background: var(--bg-card);
      border-radius: var(--radius);
      padding: 24px;
      box-shadow: var(--shadow);
      display: flex;
      align-items: center;
      gap: 16px;
      transition: transform 0.2s ease, box-shadow 0.2s ease;
    }

    .stat-card:hover {
      transform: translateY(-2px);
      box-shadow: var(--shadow-lg);
    }

    .stat-icon {
      width: 56px;
      height: 56px;
      border-radius: var(--radius-sm);
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 24px;
      color: #fff;
    }

    .stat-icon.money { background: linear-gradient(135deg, #10b981, #059669); }
    .stat-icon.records { background: linear-gradient(135deg, #3b82f6, #2563eb); }
    .stat-icon.pending { background: linear-gradient(135deg, #f59e0b, #d97706); }
    .stat-icon.customers { background: linear-gradient(135deg, #8b5cf6, #7c3aed); }

    .stat-content { flex: 1; }
    .stat-label { font-size: 14px; color: var(--text-secondary); margin-bottom: 4px; }
    .stat-value { font-size: 28px; font-weight: 700; color: var(--text-primary); }
    .stat-value.success { color: var(--success); }

    /* 卡片 */
    .card {
      background: var(--bg-card);
      border-radius: var(--radius);
      box-shadow: var(--shadow);
      margin-bottom: 24px;
      overflow: hidden;
    }

    .card-header {
      padding: 20px 24px;
      border-bottom: 1px solid var(--border);
      display: flex;
      justify-content: space-between;
      align-items: center;
    }

    .card-title {
      font-size: 16px;
      font-weight: 600;
      color: var(--text-primary);
      display: flex;
      align-items: center;
      gap: 10px;
    }

    .card-title i { color: var(--primary); }

    .card-body { padding: 24px; }

    /* 表格 */
    .data-table {
      width: 100%;
      border-collapse: collapse;
    }

    .data-table th {
      text-align: left;
      padding: 14px 16px;
      font-size: 13px;
      font-weight: 600;
      color: var(--text-secondary);
      background: var(--bg-page);
      border-bottom: 1px solid var(--border);
      text-transform: uppercase;
      letter-spacing: 0.5px;
    }

    .data-table td {
      padding: 16px;
      border-bottom: 1px solid var(--border);
      font-size: 14px;
    }

    .data-table tbody tr {
      transition: background 0.15s ease;
    }

    .data-table tbody tr:hover {
      background: var(--bg-page);
    }

    .amount { font-weight: 600; color: var(--success); font-size: 15px; }
    .amount-zero { font-weight: 600; color: #ef4444; font-size: 15px; }
    .amount-secondary { color: var(--text-muted); }
    .account-ids { font-size: 12px; color: var(--text-muted); max-width: 120px; word-break: break-all; }

    /* 标签 */
    .tag {
      display: inline-flex;
      align-items: center;
      padding: 4px 12px;
      border-radius: 20px;
      font-size: 12px;
      font-weight: 500;
    }

    .tag-new { background: #dbeafe; color: #1d4ed8; }
    .tag-renewal { background: #ede9fe; color: #7c3aed; }
    .tag-pending { background: #fef3c7; color: #d97706; }
    .tag-confirmed { background: #d1fae5; color: #059669; }
    .tag-rejected { background: #fee2e2; color: #dc2626; }
    .tag-super_admin { background: #fee2e2; color: #dc2626; }
    .tag-admin { background: #dbeafe; color: #1d4ed8; }
    .tag-viewer { background: #f3f4f6; color: #6b7280; }
    .tag-active { background: #d1fae5; color: #059669; }
    .tag-inactive { background: #fee2e2; color: #dc2626; }

    /* 筛选栏 */