/* 
 * 核心暗黑玻璃态设计系统
 * 使用原生 CSS 构建，无需预处理器 
 */

 @import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700&display=swap');

 :root {
     /* 基础色彩 */
     --bg-dark: #0f1923;
     --bg-surface: rgba(30, 41, 59, 0.7);
     --bg-surface-hover: rgba(51, 65, 85, 0.8);
     --bg-glass: rgba(15, 23, 42, 0.6);
     
     /* 主题色彩 */
     --primary: #0ea5e9;
     --primary-hover: #0284c7;
     --primary-glow: rgba(14, 165, 233, 0.3);
     --accent: #8b5cf6;
     --accent-hover: #7c3aed;
     
     /* 功能色彩 */
     --success: #10b981;
     --success-bg: rgba(16, 185, 129, 0.1);
     --warning: #f59e0b;
     --warning-bg: rgba(245, 158, 11, 0.1);
     --danger: #ef4444;
     --danger-bg: rgba(239, 68, 68, 0.1);
     --info: #3b82f6;
     --info-bg: rgba(59, 130, 246, 0.1);
     
     /* 文字色彩 */
     --text-primary: #f8fafc;
     --text-secondary: #94a3b8;
     --text-muted: #64748b;
     
     /* 边框与阴影 */
     --border: rgba(255, 255, 255, 0.08);
     --border-light: rgba(255, 255, 255, 0.15);
     --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.3);
     --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.4), 0 2px 4px -1px rgba(0, 0, 0, 0.2);
     --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.5), 0 4px 6px -2px rgba(0, 0, 0, 0.3);
     --shadow-glow: 0 0 15px rgba(14, 165, 233, 0.4);
     
     /* 过渡动画 */
     --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
     
     /* 布局参数 */
     --sidebar-width: 260px;
     --sidebar-width-collapsed: 70px;
     --header-height: 64px;
     --border-radius: 12px;
     --border-radius-sm: 6px;
     --border-radius-lg: 16px;
 }
 
 /* --- 全局重置 --- */
 * {
     margin: 0;
     padding: 0;
     box-sizing: border-box;
 }
 
 body {
     font-family: 'Inter', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
     background-color: var(--bg-dark);
     color: var(--text-primary);
     line-height: 1.5;
     overflow-x: hidden;
     /* 背景特效 */
     background-image: 
         radial-gradient(circle at 15% 50%, rgba(139, 92, 246, 0.1) 0%, transparent 25%),
         radial-gradient(circle at 85% 30%, rgba(14, 165, 233, 0.1) 0%, transparent 25%);
     background-attachment: fixed;
 }
 
 a {
     color: var(--primary);
     text-decoration: none;
     transition: var(--transition);
 }
 
 a:hover {
     color: var(--primary-hover);
 }
 
 ul {
     list-style: none;
 }
 
 /* --- 布局 --- */
 .app-container {
     display: flex;
     min-height: 100vh;
 }
 
 /* 侧边栏 */
 .sidebar {
     width: var(--sidebar-width);
     background: var(--bg-glass);
     backdrop-filter: blur(12px);
     -webkit-backdrop-filter: blur(12px);
     border-right: 1px solid var(--border);
     position: fixed;
     height: 100vh;
     z-index: 100;
     transition: var(--transition);
     display: flex;
     flex-direction: column;
 }
 
 .sidebar.collapsed {
     width: var(--sidebar-width-collapsed);
 }
 
 .sidebar-header {
     height: var(--header-height);
     display: flex;
     align-items: center;
     padding: 0 20px;
     border-bottom: 1px solid var(--border);
     overflow: hidden;
     white-space: nowrap;
 }
 
 .sidebar-header h2 {
     font-size: 18px;
     font-weight: 600;
     background: linear-gradient(135deg, var(--primary), var(--accent));
     -webkit-background-clip: text;
     -webkit-text-fill-color: transparent;
     margin-left: 10px;
     transition: opacity 0.3s;
 }
 
 .sidebar.collapsed .sidebar-header h2 {
     opacity: 0;
     display: none;
 }
 
 .sidebar-menu {
     flex: 1;
     overflow-y: auto;
     padding: 15px 10px;
 }
 
 .sidebar-menu::-webkit-scrollbar {
     width: 4px;
 }
 .sidebar-menu::-webkit-scrollbar-thumb {
     background-color: var(--border-light);
     border-radius: 4px;
 }
 
 .menu-group {
     margin-bottom: 20px;
 }
 
 .menu-title {
     font-size: 12px;
     text-transform: uppercase;
     color: var(--text-muted);
     padding: 0 10px;
     margin-bottom: 10px;
     letter-spacing: 1px;
 }
 
 .sidebar.collapsed .menu-title {
     display: none;
 }
 
 .menu-item {
     display: flex;
     align-items: center;
     padding: 10px 15px;
     color: var(--text-secondary);
     border-radius: var(--border-radius-sm);
     transition: var(--transition);
     margin-bottom: 4px;
     position: relative;
     cursor: pointer;
 }
 
 .menu-item i {
     width: 20px;
     text-align: center;
     font-size: 16px;
 }
 
 .menu-text {
     margin-left: 12px;
     font-size: 14px;
     white-space: nowrap;
 }
 
 .sidebar.collapsed .menu-text {
     display: none;
 }
 
 .menu-item:hover, .menu-item.active {
     background: var(--bg-surface-hover);
     color: var(--text-primary);
 }
 
 .menu-item.active {
     background: linear-gradient(90deg, rgba(14, 165, 233, 0.1), transparent);
     border-left: 3px solid var(--primary);
 }
 
 .menu-item.active i {
     color: var(--primary);
     text-shadow: var(--shadow-glow);
 }
 
 /* 主内容区 */
 .main-content {
     flex: 1;
     margin-left: var(--sidebar-width);
     transition: var(--transition);
     min-height: 100vh;
     display: flex;
     flex-direction: column;
 }
 
 .sidebar.collapsed ~ .main-content {
     margin-left: var(--sidebar-width-collapsed);
 }
 
 /* 顶部栏 */
 .topbar {
     height: var(--header-height);
     background: var(--bg-glass);
     backdrop-filter: blur(12px);
     border-bottom: 1px solid var(--border);
     position: sticky;
     top: 0;
     z-index: 90;
     display: flex;
     align-items: center;
     justify-content: space-between;
     padding: 0 24px;
 }
 
 .topbar-left, .topbar-right {
     display: flex;
     align-items: center;
     gap: 20px;
 }
 
 .toggle-sidebar {
     background: none;
     border: none;
     color: var(--text-secondary);
     font-size: 20px;
     cursor: pointer;
     transition: var(--transition);
 }
 
 .toggle-sidebar:hover {
     color: var(--text-primary);
 }
 
 .search-box {
     position: relative;
 }
 
 .search-box i {
     position: absolute;
     left: 12px;
     top: 50%;
     transform: translateY(-50%);
     color: var(--text-muted);
 }
 
 .search-box input {
     background: var(--bg-surface);
     border: 1px solid var(--border);
     color: var(--text-primary);
     padding: 8px 16px 8px 36px;
     border-radius: 20px;
     width: 250px;
     font-size: 14px;
     outline: none;
     transition: var(--transition);
 }
 
 .search-box input:focus {
     border-color: var(--primary);
     box-shadow: 0 0 0 2px rgba(14, 165, 233, 0.2);
     width: 300px;
 }
 
 .user-profile {
     display: flex;
     align-items: center;
     gap: 10px;
     cursor: pointer;
 }
 
 .user-avatar {
     width: 36px;
     height: 36px;
     border-radius: 50%;
     background: linear-gradient(135deg, var(--primary), var(--accent));
     display: flex;
     align-items: center;
     justify-content: center;
     font-weight: 600;
     color: white;
 }
 
 .user-info {
     display: flex;
     flex-direction: column;
 }
 
 .user-name {
     font-size: 14px;
     font-weight: 500;
 }
 
 .user-role {
     font-size: 12px;
     color: var(--text-muted);
 }
 
 /* 页面内容 */
 .page-content {
     padding: 24px;
     flex: 1;
 }
 
 .page-header {
     display: flex;
     justify-content: space-between;
     align-items: center;
     margin-bottom: 24px;
 }
 
 .page-title {
     font-size: 24px;
     font-weight: 600;
 }
 
 /* --- 组件：卡片 --- */
 .card {
     background: var(--bg-surface);
     border: 1px solid var(--border);
     border-radius: var(--border-radius);
     padding: 20px;
     box-shadow: var(--shadow-sm);
     backdrop-filter: blur(10px);
     transition: var(--transition);
     margin-bottom: 24px;
 }
 
 .card:hover {
     border-color: var(--border-light);
     box-shadow: var(--shadow-md);
 }
 
 .card-header {
     display: flex;
     justify-content: space-between;
     align-items: center;
     margin-bottom: 20px;
     padding-bottom: 12px;
     border-bottom: 1px solid var(--border);
 }
 
 .card-title {
     font-size: 16px;
     font-weight: 600;
 }
 
 /* --- 组件：统计数据看板 --- */
 .stats-grid {
     display: grid;
     grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
     gap: 20px;
     margin-bottom: 24px;
 }
 
 .stat-card {
     background: linear-gradient(145deg, var(--bg-surface), rgba(15, 23, 42, 0.8));
     border: 1px solid var(--border);
     border-radius: var(--border-radius);
     padding: 20px;
     display: flex;
     align-items: center;
     transition: var(--transition);
     position: relative;
     overflow: hidden;
 }
 
 .stat-card::before {
     content: '';
     position: absolute;
     top: 0;
     left: 0;
     width: 100%;
     height: 100%;
     background: linear-gradient(135deg, transparent, rgba(255, 255, 255, 0.03));
     pointer-events: none;
 }
 
 .stat-card:hover {
     transform: translateY(-3px);
     box-shadow: var(--shadow-md);
     border-color: rgba(255, 255, 255, 0.15);
 }
 
 .stat-icon {
     width: 48px;
     height: 48px;
     border-radius: 12px;
     display: flex;
     align-items: center;
     justify-content: center;
     font-size: 24px;
     margin-right: 16px;
     background: rgba(255, 255, 255, 0.05);
 }
 
 .stat-info {
     flex: 1;
 }
 
 .stat-label {
     font-size: 13px;
     color: var(--text-secondary);
     margin-bottom: 4px;
 }
 
 .stat-value {
     font-size: 24px;
     font-weight: 700;
     color: white;
 }
 
 /* 针对不同类型的图标颜色 */
 .stat-icon.primary { color: var(--primary); background: rgba(14, 165, 233, 0.1); }
 .stat-icon.success { color: var(--success); background: var(--success-bg); }
 .stat-icon.warning { color: var(--warning); background: var(--warning-bg); }
 .stat-icon.danger { color: var(--danger); background: var(--danger-bg); }
 .stat-icon.accent { color: var(--accent); background: rgba(139, 92, 246, 0.1); }
 
 /* --- 组件：表格 --- */
 .table-container {
     width: 100%;
     overflow-x: auto;
     border-radius: var(--border-radius-sm);
 }
 
 .table {
     width: 100%;
     border-collapse: collapse;
     white-space: nowrap;
 }
 
 .table th, .table td {
     padding: 12px 16px;
     text-align: left;
     border-bottom: 1px solid var(--border);
 }
 
 .table th {
     font-size: 12px;
     font-weight: 600;
     text-transform: uppercase;
     color: var(--text-muted);
     background: rgba(0, 0, 0, 0.2);
 }
 
 .table td {
     font-size: 14px;
     color: var(--text-primary);
 }
 
 .table tbody tr {
     transition: background-color 0.2s;
 }
 
 .table tbody tr:hover {
     background-color: rgba(255, 255, 255, 0.03);
 }
 
 /* --- 组件：表单与按钮 --- */
 .btn {
     display: inline-flex;
     align-items: center;
     justify-content: center;
     gap: 8px;
     padding: 8px 16px;
     border-radius: var(--border-radius-sm);
     font-size: 14px;
     font-weight: 500;
     cursor: pointer;
     transition: var(--transition);
     border: 1px solid transparent;
     outline: none;
 }
 
 .btn-primary {
     background: var(--primary);
     color: white;
 }
 
 .btn-primary:hover {
     background: var(--primary-hover);
     box-shadow: var(--shadow-glow);
 }
 
 .btn-secondary {
     background: var(--bg-surface);
     color: var(--text-primary);
     border-color: var(--border);
 }
 
 .btn-secondary:hover {
     background: var(--bg-surface-hover);
     border-color: var(--border-light);
 }
 
 .btn-success { background: var(--success); color: white; }
 .btn-danger { background: var(--danger); color: white; }
 .btn-warning { background: var(--warning); color: white; }
 
 .btn-sm {
     padding: 4px 10px;
     font-size: 12px;
 }
 
 .form-group {
     margin-bottom: 16px;
 }
 
 .form-label {
     display: block;
     margin-bottom: 8px;
     font-size: 14px;
     color: var(--text-secondary);
 }
 
 .form-input, .form-select, .form-textarea {
     width: 100%;
     background: rgba(0, 0, 0, 0.2);
     border: 1px solid var(--border);
     color: white;
     padding: 10px 14px;
     border-radius: var(--border-radius-sm);
     font-size: 14px;
     transition: var(--transition);
     font-family: inherit;
 }
 
 .form-select {
     appearance: none;
     background-image: url("data:image/svg+xml;charset=UTF-8,%3csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='%2394a3b8' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'%3e%3cpolyline points='6 9 12 15 18 9'%3e%3c/polyline%3e%3c/svg%3e");
     background-repeat: no-repeat;
     background-position: right 10px center;
     background-size: 16px;
     padding-right: 32px;
 }
 
 .form-select option {
     background: var(--bg-dark);
     color: white;
 }
 
 .form-input:focus, .form-select:focus, .form-textarea:focus {
     border-color: var(--primary);
     box-shadow: 0 0 0 2px rgba(14, 165, 233, 0.2);
     background: rgba(0, 0, 0, 0.4);
 }
 
 /* --- 组件：徽章与标签 --- */
 .badge {
     display: inline-flex;
     align-items: center;
     padding: 2px 8px;
     border-radius: 12px;
     font-size: 12px;
     font-weight: 500;
 }
 
 .badge-success { background: var(--success-bg); color: var(--success); border: 1px solid rgba(16, 185, 129, 0.2); }
 .badge-warning { background: var(--warning-bg); color: var(--warning); border: 1px solid rgba(245, 158, 11, 0.2); }
 .badge-danger { background: var(--danger-bg); color: var(--danger); border: 1px solid rgba(239, 68, 68, 0.2); }
 .badge-info { background: var(--info-bg); color: var(--primary); border: 1px solid rgba(14, 165, 233, 0.2); }
 .badge-secondary { background: rgba(255, 255, 255, 0.1); color: var(--text-secondary); border: 1px solid var(--border); }
 
 /* --- 工具类 --- */
 .flex { display: flex; }
 .items-center { align-items: center; }
 .justify-between { justify-content: space-between; }
 .gap-2 { gap: 8px; }
 .gap-3 { gap: 12px; }
 .gap-4 { gap: 16px; }
 .mt-2 { margin-top: 8px; }
 .mt-3 { margin-top: 12px; }
 .mt-4 { margin-top: 16px; }
 .mb-2 { margin-bottom: 8px; }
 .mb-3 { margin-bottom: 12px; }
 .mb-4 { margin-bottom: 16px; }
 .mr-2 { margin-right: 8px; }
 .ml-2 { margin-left: 8px; }
 .py-5 { padding-top: 20px; padding-bottom: 20px; }
 .px-4 { padding-left: 16px; padding-right: 16px; }
 .text-center { text-align: center; }
 .text-muted { color: var(--text-muted); }
 .text-success { color: var(--success); }
 .text-danger { color: var(--danger); }
 .text-warning { color: var(--warning); }
 .text-primary { color: var(--primary); }
 .font-mono { font-family: 'JetBrains Mono', 'Fira Code', monospace; }
 .btn-outline { background: transparent; border: 1px solid var(--border-light); color: var(--text-secondary); }
 .btn-outline:hover { background: var(--bg-surface); border-color: var(--primary); color: var(--primary); }
 
 /* --- 响应式 --- */
 @media (max-width: 768px) {
     .sidebar {
         transform: translateX(-100%);
     }
     .sidebar.mobile-open {
         transform: translateX(0);
     }
     .main-content, .sidebar.collapsed ~ .main-content {
         margin-left: 0;
     }
     .stats-grid {
         grid-template-columns: 1fr;
     }
     .topbar {
         padding: 0 16px;
     }
     .search-box input {
         width: 150px;
     }
     .search-box input:focus {
         width: 180px;
     }
 }
 
 /* 消息提示 */
 .messages {
     position: fixed;
     top: 80px;
     right: 24px;
     z-index: 1050;
     display: flex;
     flex-direction: column;
     gap: 10px;
 }
 
 .alert {
     min-width: 300px;
     padding: 12px 16px;
     border-radius: var(--border-radius-sm);
     display: flex;
     align-items: center;
     justify-content: space-between;
     backdrop-filter: blur(8px);
     box-shadow: var(--shadow-lg);
     animation: slideInRight 0.3s ease forwards;
     border-left: 4px solid;
 }
 
 @keyframes slideInRight {
     from { transform: translateX(100%); opacity: 0; }
     to { transform: translateX(0); opacity: 1; }
 }
 
 .alert-success { background: rgba(16, 185, 129, 0.15); border-left-color: var(--success); color: #fff; }
 .alert-danger { background: rgba(239, 68, 68, 0.15); border-left-color: var(--danger); color: #fff; }
 .alert-warning { background: rgba(245, 158, 11, 0.15); border-left-color: var(--warning); color: #fff; }
 .alert-info { background: rgba(59, 130, 246, 0.15); border-left-color: var(--info); color: #fff; }
 
 /* 分页 */
 .pagination {
     display: flex;
     justify-content: center;
     gap: 8px;
     margin-top: 24px;
 }
 
 .page-link {
     width: 36px;
     height: 36px;
     display: flex;
     align-items: center;
     justify-content: center;
     background: var(--bg-surface);
     border: 1px solid var(--border);
     border-radius: var(--border-radius-sm);
     color: var(--text-primary);
     transition: var(--transition);
 }
 
 .page-link:hover {
     background: var(--bg-surface-hover);
     border-color: var(--primary);
 }
 
 .page-link.active {
     background: var(--primary);
     border-color: var(--primary);
     color: white;
 }
 
 .page-link.disabled {
     opacity: 0.5;
     cursor: not-allowed;
 }