* { margin: 0; padding: 0; box-sizing: border-box; }
:root {
  --primary-bg: #0f1419;
  --secondary-bg: #1a2332;
  --card-bg: #1e2a3a;
  --accent-color: #3b82f6;
  --success-color: #22c55e;
  --warning-color: #f59e0b;
  --danger-color: #ef4444;
  --text-primary: #fff;
  --text-secondary: #94a3b8;
  --text-muted: #64748b;
  --border-color: #334155;
  --gradient-accent: linear-gradient(135deg, #3b82f6 0%, #2563eb 100%);
  --gradient-card: linear-gradient(135deg, #1e2a3a 0%, #243447 100%);
}

body { font-family: 'Segoe UI', sans-serif; background: var(--primary-bg); color: var(--text-primary); line-height: 1.6; }
.container { display: flex; min-height: 100vh; }

.sidebar { width: 260px; background: var(--secondary-bg); border-right: 1px solid var(--border-color); position: fixed; height: 100vh; overflow-y: auto; }
.sidebar-header { padding: 1.5rem; border-bottom: 1px solid var(--border-color); }
.logo { display: flex; align-items: center; gap: 0.75rem; }
.logo i { font-size: 1.5rem; color: var(--accent-color); }
.logo h2 { font-size: 1.1rem; font-weight: 600; }
.nav-menu { list-style: none; padding: 1rem 0; }
.nav-section { padding: 0.5rem 1.5rem; font-size: 0.75rem; color: var(--text-muted); text-transform: uppercase; }
.nav-item { margin: 0.25rem 1rem; }
.nav-link { display: flex; align-items: center; gap: 0.75rem; padding: 0.75rem 1rem; color: var(--text-secondary); text-decoration: none; border-radius: 8px; transition: all 0.2s; }
.nav-link:hover, .nav-item.active .nav-link { background: rgba(59,130,246,0.15); color: var(--accent-color); }
.nav-link i { font-size: 1rem; min-width: 20px; }

.main-content { flex: 1; margin-left: 260px; min-height: 100vh; }
.top-bar { display: flex; justify-content: space-between; align-items: center; padding: 1rem 1.5rem; background: var(--secondary-bg); border-bottom: 1px solid var(--border-color); }
.page-title { font-size: 1.25rem; font-weight: 600; }
.top-bar-right { display: flex; align-items: center; gap: 1rem; }
.status-indicator { display: flex; align-items: center; gap: 0.5rem; font-size: 0.875rem; color: var(--text-secondary); }
.status-dot { width: 8px; height: 8px; border-radius: 50%; background: var(--success-color); }
.user-info { display: flex; align-items: center; gap: 0.5rem; color: var(--text-secondary); font-size: 0.875rem; }

.page-content { padding: 1.5rem; }
.page { display: none; }
.page.active { display: block; }
.page-desc { color: var(--text-secondary); margin-bottom: 1rem; font-size: 0.9rem; }

.stats-grid { display: grid; gap: 1rem; margin-bottom: 1.5rem; }
.stats-grid.stats-6 { grid-template-columns: repeat(3, 1fr); }
.stats-grid.stats-8 { grid-template-columns: repeat(4, 1fr); }
@media (max-width: 1200px) { .stats-grid.stats-6 { grid-template-columns: repeat(2, 1fr); } .stats-grid.stats-8 { grid-template-columns: repeat(2, 1fr); } }
@media (max-width: 640px) { .stats-grid.stats-6, .stats-grid.stats-8 { grid-template-columns: 1fr; } }
.stat-card { background: var(--gradient-card); border: 1px solid var(--border-color); border-radius: 12px; padding: 1.25rem; display: flex; align-items: center; gap: 1rem; }
.stat-icon { width: 48px; height: 48px; border-radius: 10px; background: var(--gradient-accent); display: flex; align-items: center; justify-content: center; }
.stat-icon i { font-size: 1.25rem; color: #fff; }
.stat-info h3 { font-size: 0.9rem; color: var(--text-secondary); font-weight: 500; }
.stat-value { font-size: 1.5rem; font-weight: 700; color: var(--text-primary); }

.dashboard-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(300px, 1fr)); gap: 1rem; }
.dashboard-card { background: var(--gradient-card); border: 1px solid var(--border-color); border-radius: 12px; overflow: hidden; }
.card-header { padding: 1rem 1.25rem; border-bottom: 1px solid var(--border-color); }
.card-header h3 { font-size: 1rem; font-weight: 600; }
.card-content { padding: 1rem 1.25rem; }
.status-row { display: flex; justify-content: space-between; padding: 0.5rem 0; font-size: 0.9rem; }
.badge { padding: 0.25rem 0.5rem; border-radius: 6px; font-size: 0.75rem; }
.badge.success { background: rgba(34,197,94,0.2); color: var(--success-color); }

.page-header { display: flex; justify-content: space-between; align-items: flex-start; margin-bottom: 1.5rem; gap: 1rem; flex-wrap: wrap; }
.page-header h2 { font-size: 1.5rem; margin-bottom: 0.25rem; }
.filter-tabs { display: flex; gap: 0.5rem; margin-bottom: 1rem; }
.filter-tab { padding: 0.5rem 1rem; border: 1px solid var(--border-color); background: var(--card-bg); color: var(--text-secondary); border-radius: 8px; cursor: pointer; font-size: 0.875rem; }
.filter-tab:hover, .filter-tab.active { background: var(--accent-color); color: #fff; border-color: var(--accent-color); }

.table-card, .config-card { background: var(--gradient-card); border: 1px solid var(--border-color); border-radius: 12px; overflow: hidden; margin-bottom: 1rem; }
.config-card .card-content { padding: 1.25rem; }
.data-table { width: 100%; border-collapse: collapse; font-size: 0.9rem; }
.data-table th, .data-table td { padding: 0.75rem 1rem; text-align: left; border-bottom: 1px solid var(--border-color); }
.data-table th { background: rgba(0,0,0,0.2); color: var(--text-secondary); font-weight: 500; }
.data-table tr:hover td { background: rgba(59,130,246,0.05); }
.data-table .btn-icon { padding: 0.25rem 0.5rem; border: none; background: transparent; color: var(--text-secondary); cursor: pointer; border-radius: 4px; }
.data-table .btn-icon:hover { color: var(--accent-color); background: rgba(59,130,246,0.1); }

.btn { display: inline-flex; align-items: center; gap: 0.5rem; padding: 0.6rem 1rem; border: none; border-radius: 8px; font-size: 0.875rem; font-weight: 500; cursor: pointer; transition: all 0.2s; }
.btn-primary { background: var(--gradient-accent); color: #fff; }
.btn-primary:hover { opacity: 0.9; transform: translateY(-1px); }
.btn-secondary { background: var(--card-bg); color: var(--text-secondary); border: 1px solid var(--border-color); }
.btn-danger { background: var(--danger-color); color: #fff; }

.form-group { margin-bottom: 1rem; }
.form-group label { display: block; margin-bottom: 0.4rem; font-size: 0.875rem; color: var(--text-secondary); }
.form-input, .form-select, textarea.form-input { width: 100%; padding: 0.6rem 0.75rem; border: 1px solid var(--border-color); border-radius: 8px; background: var(--card-bg); color: var(--text-primary); font-size: 0.9rem; }
.form-input:focus, textarea.form-input:focus { outline: none; border-color: var(--accent-color); }
textarea.form-input { min-height: 80px; resize: vertical; }

.modal { display: none; position: fixed; inset: 0; background: rgba(0,0,0,0.7); z-index: 2000; align-items: center; justify-content: center; }
.modal.show { display: flex; }
.modal-content { background: var(--secondary-bg); border: 1px solid var(--border-color); border-radius: 12px; width: 90%; max-width: 500px; max-height: 90vh; overflow: hidden; }
.modal-header { display: flex; justify-content: space-between; align-items: center; padding: 1rem 1.25rem; border-bottom: 1px solid var(--border-color); }
.modal-header h3 { font-size: 1.1rem; }
.modal-close { background: none; border: none; color: var(--text-secondary); font-size: 1.5rem; cursor: pointer; padding: 0.25rem; }
.modal-close:hover { color: var(--accent-color); }
.modal-body { padding: 1.25rem; max-height: 60vh; overflow-y: auto; }

.login-page { display: flex; align-items: center; justify-content: center; min-height: 100vh; }
.login-box { background: var(--secondary-bg); border: 1px solid var(--border-color); border-radius: 16px; padding: 2rem; width: 100%; max-width: 360px; }
.login-header { text-align: center; margin-bottom: 1.5rem; }
.login-header i { font-size: 2.5rem; color: var(--accent-color); margin-bottom: 0.5rem; display: block; }
.login-header h1 { font-size: 1.25rem; margin-bottom: 0.25rem; }
.login-header p { font-size: 0.875rem; color: var(--text-secondary); }
.login-form .form-group { margin-bottom: 1rem; }
.btn-block { width: 100%; justify-content: center; }

/* 消息按钮配置区 */
.button-manager { margin-top: 1rem; padding-top: 1rem; border-top: 1px solid var(--border-color); }
.button-item { margin-bottom: 1rem; padding: 0.75rem; background: rgba(0,0,0,0.2); border-radius: 8px; border: 1px solid var(--border-color); }
.button-row { display: flex; align-items: flex-end; gap: 1rem; flex-wrap: wrap; }
.button-field { flex: 1; min-width: 120px; }
.button-field .form-input { width: 100%; }
.form-label { display: block; margin-bottom: 0.3rem; font-size: 0.85rem; color: var(--text-secondary); }
.form-help { font-size: 0.75rem; color: var(--text-muted); margin-top: 0.25rem; }
.button-actions { align-self: flex-end; }
.btn-sm { padding: 0.35rem 0.6rem; font-size: 0.8rem; }