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

:root {
    /* 主色调 */
    --primary: #667eea;
    --primary-dark: #5568d3;
    --primary-light: #7c8ff0;
    --secondary: #764ba2;
    --secondary-dark: #6a3a8f;
    
    /* 功能色 */
    --success: #10b981;
    --success-dark: #059669;
    --danger: #ef4444;
    --danger-dark: #dc2626;
    --warning: #f59e0b;
    --warning-dark: #d97706;
    --info: #3b82f6;
    --info-dark: #2563eb;
    
    /* 中性色 */
    --gray-50: #f9fafb;
    --gray-100: #f3f4f6;
    --gray-200: #e5e7eb;
    --gray-300: #d1d5db;
    --gray-400: #9ca3af;
    --gray-500: #6b7280;
    --gray-600: #4b5563;
    --gray-700: #374151;
    --gray-800: #1f2937;
    --gray-900: #111827;
    
    /* 间距 */
    --spacing-xs: 4px;
    --spacing-sm: 8px;
    --spacing-md: 16px;
    --spacing-lg: 24px;
    --spacing-xl: 32px;
    --spacing-2xl: 48px;
    
    /* 圆角 */
    --radius-sm: 6px;
    --radius-md: 8px;
    --radius-lg: 12px;
    --radius-xl: 16px;
    --radius-full: 9999px;
    
    /* 阴影 */
    --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
    --shadow-md: 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);
    --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 10px 10px -5px rgba(0, 0, 0, 0.04);
    
    /* 过渡 */
    --transition-fast: 150ms ease-in-out;
    --transition-base: 200ms ease-in-out;
    --transition-slow: 300ms ease-in-out;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, 'Noto Sans', sans-serif, 'Apple Color Emoji', 'Segoe UI Emoji', 'Segoe UI Symbol';
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    background-attachment: fixed;
    min-height: 100vh;
    padding: var(--spacing-md);
    color: var(--gray-800);
    line-height: 1.6;
}

.container {
    max-width: 1400px;
    margin: 0 auto;
    width: 100%;
    /* 让侧边栏和主内容在桌面端并排显示 */
    display: flex;
    align-items: flex-start;
    gap: var(--spacing-lg);
}

.header {
    background: white;
    padding: var(--spacing-lg) var(--spacing-xl);
    border-radius: var(--radius-lg);
    margin-bottom: var(--spacing-lg);
    box-shadow: var(--shadow-lg);
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: var(--spacing-md);
    backdrop-filter: blur(10px);
    border: 1px solid rgba(255, 255, 255, 0.2);
}

.header h1 {
    color: var(--gray-800);
    font-size: 28px;
    font-weight: 700;
    background: linear-gradient(135deg, var(--primary) 0%, var(--secondary) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    margin: 0;
}

.user-info {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    flex-wrap: wrap;
}

.user-badge {
    background: linear-gradient(135deg, var(--primary) 0%, var(--secondary) 100%);
    color: white;
    padding: var(--spacing-sm) var(--spacing-md);
    border-radius: var(--radius-full);
    font-size: 13px;
    font-weight: 600;
    box-shadow: var(--shadow-md);
    transition: all var(--transition-base);
}

.user-badge:hover {
    transform: translateY(-1px);
    box-shadow: var(--shadow-lg);
}

.btn {
    padding: 10px 24px;
    border: none;
    border-radius: var(--radius-md);
    cursor: pointer;
    font-size: 14px;
    font-weight: 500;
    transition: all var(--transition-base);
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-sm);
    text-decoration: none;
    box-shadow: var(--shadow-sm);
    position: relative;
    overflow: hidden;
}

.btn::before {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    width: 0;
    height: 0;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.2);
    transform: translate(-50%, -50%);
    transition: width 0.6s, height 0.6s;
}

.btn:hover::before {
    width: 300px;
    height: 300px;
}

.btn:active {
    transform: translateY(1px);
    box-shadow: var(--shadow-sm);
}

.btn-primary {
    background: linear-gradient(135deg, var(--primary) 0%, var(--primary-dark) 100%);
    color: white;
}

.btn-primary:hover {
    background: linear-gradient(135deg, var(--primary-dark) 0%, var(--primary) 100%);
    box-shadow: var(--shadow-md);
    transform: translateY(-2px);
}

.btn-danger {
    background: linear-gradient(135deg, var(--danger) 0%, var(--danger-dark) 100%);
    color: white;
}

.btn-danger:hover {
    background: linear-gradient(135deg, var(--danger-dark) 0%, var(--danger) 100%);
    box-shadow: var(--shadow-md);
    transform: translateY(-2px);
}

.btn-warning {
    background: linear-gradient(135deg, var(--warning) 0%, var(--warning-dark) 100%);
    color: white;
}

.btn-warning:hover {
    background: linear-gradient(135deg, var(--warning-dark) 0%, var(--warning) 100%);
    box-shadow: var(--shadow-md);
    transform: translateY(-2px);
}

.btn-info {
    background: linear-gradient(135deg, var(--info) 0%, var(--info-dark) 100%);
    color: white;
}

.btn-info:hover {
    background: linear-gradient(135deg, var(--info-dark) 0%, var(--info) 100%);
    box-shadow: var(--shadow-md);
    transform: translateY(-2px);
}

.btn-success {
    background: linear-gradient(135deg, var(--success) 0%, var(--success-dark) 100%);
    color: white;
}

.btn-success:hover {
    background: linear-gradient(135deg, var(--success-dark) 0%, var(--success) 100%);
    box-shadow: var(--shadow-md);
    transform: translateY(-2px);
}

.btn-secondary {
    background: linear-gradient(135deg, var(--gray-600) 0%, var(--gray-700) 100%);
    color: white;
}

.btn-secondary:hover {
    background: linear-gradient(135deg, var(--gray-700) 0%, var(--gray-600) 100%);
    box-shadow: var(--shadow-md);
    transform: translateY(-2px);
}

.btn:disabled {
    opacity: 0.6;
    cursor: not-allowed;
    transform: none !important;
}

/* 登录页面 */
.login-container {
    max-width: 440px;
    margin: 80px auto;
    background: white;
    padding: var(--spacing-2xl);
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow-xl);
    backdrop-filter: blur(10px);
    border: 1px solid rgba(255, 255, 255, 0.2);
    animation: slideUp 0.5s ease-out;
}

@keyframes slideUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.login-container h2 {
    text-align: center;
    margin-bottom: var(--spacing-xl);
    color: var(--gray-800);
    font-size: 28px;
    font-weight: 700;
    background: linear-gradient(135deg, var(--primary) 0%, var(--secondary) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.form-group {
    margin-bottom: var(--spacing-lg);
}

.form-group label {
    display: block;
    margin-bottom: var(--spacing-sm);
    color: var(--gray-700);
    font-weight: 600;
    font-size: 14px;
}

.form-group input,
.form-group select,
.form-group textarea {
    width: 100%;
    padding: 12px 16px;
    border: 2px solid var(--gray-200);
    border-radius: var(--radius-md);
    font-size: 14px;
    transition: all var(--transition-base);
    background: white;
    color: var(--gray-800);
    font-family: inherit;
}

.form-group input:hover,
.form-group select:hover,
.form-group textarea:hover {
    border-color: var(--gray-300);
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--primary);
    box-shadow: 0 0 0 3px rgba(102, 126, 234, 0.1);
}

.form-group input::placeholder,
.form-group textarea::placeholder {
    color: var(--gray-400);
}

.form-group small {
    display: block;
    margin-top: var(--spacing-xs);
    color: var(--gray-500);
    font-size: 12px;
}

/* 主内容区 */
.main-content {
    display: none;
    animation: fadeIn 0.4s ease-out;
}

.main-content.active {
    display: block;
}

/* 主内容包装容器，占据除侧边栏外的剩余宽度 */
.main-content-wrapper {
    flex: 1;
    min-width: 0; /* 防止内容把布局挤爆 */
}

.menu-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
    gap: var(--spacing-lg);
    margin-bottom: var(--spacing-lg);
}

/* 普通管理员菜单布局优化（更紧凑） */
.menu-grid.compact {
    grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
    gap: var(--spacing-md);
}

.menu-card {
    background: white;
    padding: var(--spacing-xl);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-md);
    cursor: pointer;
    transition: all var(--transition-slow);
    text-align: center;
    border: 1px solid var(--gray-100);
    position: relative;
    overflow: hidden;
}

.menu-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: linear-gradient(90deg, var(--primary) 0%, var(--secondary) 100%);
    transform: scaleX(0);
    transform-origin: left;
    transition: transform var(--transition-slow);
}

.menu-card:hover {
    transform: translateY(-6px);
    box-shadow: var(--shadow-xl);
    border-color: var(--primary-light);
}

.menu-card:hover::before {
    transform: scaleX(1);
}

.menu-card h3 {
    color: var(--gray-800);
    margin-bottom: var(--spacing-sm);
    font-size: 20px;
    font-weight: 600;
}

.menu-card p {
    color: var(--gray-600);
    font-size: 14px;
    line-height: 1.5;
    margin: 0;
}

/* 功能页面 */
.function-page {
    display: none;
    background: white;
    padding: var(--spacing-xl);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-lg);
    animation: fadeIn 0.3s ease-out;
    border: 1px solid var(--gray-100);
}

.function-page.active {
    display: block;
}

.function-page h2 {
    color: var(--gray-800);
    margin-bottom: var(--spacing-lg);
    padding-bottom: var(--spacing-md);
    border-bottom: 3px solid;
    border-image: linear-gradient(90deg, var(--primary) 0%, var(--secondary) 100%) 1;
    font-size: 26px;
    font-weight: 700;
}

.form-row {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-md);
}

.form-group-full {
    grid-column: 1 / -1;
}

/* Card 组件 */
.card {
    background: white;
    padding: var(--spacing-xl);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-md);
    border: 1px solid var(--gray-100);
    margin-bottom: var(--spacing-lg);
    transition: all var(--transition-base);
}

.card:hover {
    box-shadow: var(--shadow-lg);
}

.card h3 {
    color: var(--gray-800);
    margin-bottom: var(--spacing-md);
    font-size: 20px;
    font-weight: 600;
    padding-bottom: var(--spacing-sm);
    border-bottom: 2px solid var(--gray-100);
}

.alert {
    padding: var(--spacing-md) var(--spacing-lg);
    border-radius: var(--radius-md);
    margin-bottom: var(--spacing-lg);
    border-left: 4px solid;
    display: flex;
    align-items: flex-start;
    gap: var(--spacing-sm);
    font-size: 14px;
    line-height: 1.6;
}

.alert-success {
    background: #ecfdf5;
    color: #065f46;
    border-color: var(--success);
}

.alert-error {
    background: #fef2f2;
    color: #991b1b;
    border-color: var(--danger);
}

.alert-info {
    background: #eff6ff;
    color: #1e40af;
    border-color: var(--info);
}

.alert-warning {
    background: #fffbeb;
    color: #92400e;
    border-color: var(--warning);
}

/* 表格样式 */
.table-container {
    overflow-x: auto;
    margin-top: var(--spacing-lg);
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-sm);
    border: 1px solid var(--gray-200);
}

.table-container.virtual-scroll {
    overflow-y: auto;
}

.virtual-spacer td {
    padding: 0 !important;
    border: 0 !important;
}

tbody tr.virtual-spacer:hover {
    background: transparent;
    box-shadow: none;
}

table {
    width: 100%;
    border-collapse: collapse;
    background: white;
    min-width: 600px;
}

th, td {
    padding: var(--spacing-md);
    text-align: left;
    border-bottom: 1px solid var(--gray-200);
}

th {
    background: linear-gradient(135deg, var(--primary) 0%, var(--secondary) 100%);
    color: white;
    font-weight: 600;
    font-size: 14px;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    position: sticky;
    top: 0;
    z-index: 10;
}

tbody tr {
    transition: all var(--transition-fast);
}

tbody tr:hover {
    background: var(--gray-50);
    box-shadow: var(--shadow-sm);
}

tbody tr:last-child td {
    border-bottom: none;
}

.action-buttons {
    display: flex;
    gap: var(--spacing-sm);
    flex-wrap: wrap;
}

.btn-sm {
    padding: 6px 14px;
    font-size: 12px;
    border-radius: var(--radius-sm);
}

/* 加载动画 */
.loading {
    text-align: center;
    padding: var(--spacing-2xl);
    color: var(--gray-600);
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    min-height: 200px;
}

.loading p {
    margin-top: var(--spacing-md);
    font-size: 14px;
    color: var(--gray-500);
}

.spinner {
    border: 4px solid var(--gray-200);
    border-top: 4px solid var(--primary);
    border-radius: 50%;
    width: 48px;
    height: 48px;
    animation: spin 0.8s linear infinite;
    margin: 0 auto;
}

@keyframes spin {
    0% { transform: rotate(0deg); }
    100% { transform: rotate(360deg); }
}

@keyframes fadeIn {
    from {
        opacity: 0;
    }
    to {
        opacity: 1;
    }
}

/* 返回按钮 */
.back-btn {
    margin-bottom: var(--spacing-lg);
}

.back-btn .btn {
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-sm);
}

/* 统计卡片 */
.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
    gap: var(--spacing-lg);
    margin-bottom: var(--spacing-lg);
}

.stat-card {
    background: linear-gradient(135deg, var(--primary) 0%, var(--secondary) 100%);
    color: white;
    padding: var(--spacing-xl);
    border-radius: var(--radius-lg);
    text-align: center;
    box-shadow: var(--shadow-lg);
    transition: all var(--transition-base);
    border: 1px solid rgba(255, 255, 255, 0.1);
    position: relative;
    overflow: hidden;
}

.stat-card::before {
    content: '';
    position: absolute;
    top: -50%;
    right: -50%;
    width: 200%;
    height: 200%;
    background: radial-gradient(circle, rgba(255,255,255,0.1) 0%, transparent 70%);
    animation: pulse 3s ease-in-out infinite;
}

@keyframes pulse {
    0%, 100% {
        transform: scale(1);
        opacity: 0.5;
    }
    50% {
        transform: scale(1.1);
        opacity: 0.8;
    }
}

.stat-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-xl);
}

.stat-card h3 {
    font-size: 36px;
    margin-bottom: var(--spacing-sm);
    font-weight: 700;
    position: relative;
    z-index: 1;
}

.stat-card p {
    opacity: 0.95;
    font-size: 14px;
    font-weight: 500;
    position: relative;
    z-index: 1;
    margin: 0;
}

/* 统计表格辅助样式 */
.stats-controls {
    display: flex;
    align-items: center;
    justify-content: flex-end;
    margin-bottom: var(--spacing-md);
    gap: var(--spacing-sm);
    flex-wrap: wrap;
}

.stats-sort {
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 13px;
    color: #4b5563;
}

.stats-sort-select {
    padding: 6px 8px;
    border: 1px solid var(--gray-200);
    border-radius: 8px;
    background: #fff;
    font-size: 13px;
}

.stats-sort-order {
    padding: 6px 10px;
    border: 1px solid var(--gray-200);
    border-radius: 8px;
    background: #f8fafc;
    font-size: 12px;
    cursor: pointer;
    color: #475569;
}

.stats-sort-order:hover {
    background: #eef2ff;
}

.group-title {
    font-weight: 600;
}

.group-id {
    color: #666;
    font-size: 0.85em;
}

.group-links {
    margin-top: 4px;
    margin-left: 14px;
    display: flex;
    flex-direction: column;
    gap: 2px;
    font-size: 0.82em;
    color: #666;
}

.group-links-cell {
    vertical-align: middle;
    text-align: left;
    min-width: 140px;
    padding-top: 6px;
    padding-bottom: 6px;
}

.group-links-cell .group-links {
    margin: 0;
    align-items: flex-start;
    font-size: 0.85em;
    gap: 1px;
}

.group-links-cell .group-link-line {
    justify-content: flex-start;
}

.stats-table th,
.stats-table td {
    vertical-align: middle;
}

.stats-table td {
    padding-top: 10px;
    padding-bottom: 10px;
}

.stats-table .member-count-cell {
    text-align: center;
}

.stats-table .member-count-value {
    font-weight: 600;
    font-size: 1.05em;
}

.stats-table .member-count-updated {
    font-size: 0.82em;
    color: #6b7280;
}

.stats-table .stats-number-cell {
    text-align: center;
    font-weight: 600;
    color: #1f2937;
}

.stats-table-container table {
    table-layout: fixed;
}

.stats-table th:nth-child(1),
.stats-table td:nth-child(1) {
    width: 44%;
}

.stats-table th:nth-child(2),
.stats-table td:nth-child(2) {
    width: 16%;
}

.stats-table th:nth-child(3),
.stats-table td:nth-child(3) {
    width: 16%;
}

.stats-table th:nth-child(4),
.stats-table td:nth-child(4),
.stats-table th:nth-child(5),
.stats-table td:nth-child(5) {
    width: 12%;
}

.group-links-empty {
    color: #999;
}

.group-link-line {
    display: flex;
    align-items: center;
    gap: 6px;
}

.group-link-line a {
    color: #475569;
    text-decoration: none;
}

.group-link-line a:hover {
    text-decoration: underline;
}

.copy-link-button {
    border: 1px solid var(--gray-200);
    background: #f8fafc;
    color: #475569;
    border-radius: 6px;
    font-size: 11px;
    padding: 2px 6px;
    cursor: pointer;
}

.copy-link-button:hover {
    background: #eef2ff;
}

.member-count-value {
    font-weight: 600;
}

.member-count-updated {
    color: #8b95a1;
    font-size: 0.78em;
    margin-top: 2px;
}

/* 群组选择复选框样式 */
.group-checkbox {
    cursor: pointer;
    margin-right: var(--spacing-sm);
    width: 18px;
    height: 18px;
    accent-color: var(--primary);
}

/* 消息分页批量选择复选框 */
.msg-select,
#selectAllMessages {
    cursor: pointer;
    width: 18px;
    height: 18px;
    accent-color: var(--primary);
    transform: scale(1.2);
}

#groupListContainer label,
#blacklistGroupListContainer label,
#whitelistGroupListContainer label,
#muteGroupListContainer label,
#deleteGroupListContainer label {
    display: flex;
    align-items: center;
    cursor: pointer;
    padding: var(--spacing-sm) var(--spacing-md);
    border-bottom: 1px solid var(--gray-200);
    transition: all var(--transition-fast);
    border-radius: var(--radius-sm);
    margin: 2px 0;
}

#groupListContainer label:hover,
#blacklistGroupListContainer label:hover,
#whitelistGroupListContainer label:hover,
#muteGroupListContainer label:hover,
#deleteGroupListContainer label:hover {
    background: var(--gray-50);
    transform: translateX(4px);
}

#groupListContainer label:last-child,
#blacklistGroupListContainer label:last-child,
#whitelistGroupListContainer label:last-child,
#muteGroupListContainer label:last-child,
#deleteGroupListContainer label:last-child {
    border-bottom: none;
}

/* 权限范围提示样式 */
.permission-hint {
    background: linear-gradient(135deg, #e3f2fd 0%, #bbdefb 100%);
    border: 2px solid #90caf9;
    border-radius: var(--radius-lg);
    padding: var(--spacing-lg) var(--spacing-xl);
    box-shadow: var(--shadow-md);
    animation: fadeIn 0.3s ease-in;
}

.permission-hint-content {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    transition: background-color var(--transition-fast);
}

.permission-hint-content:hover {
    background-color: rgba(255, 255, 255, 0.3);
    border-radius: var(--radius-md);
    padding: 4px;
    margin: -4px;
}

.toggle-icon {
    transition: transform var(--transition-base);
    user-select: none;
}

.group-list-detail {
    animation: slideDown 0.3s ease-out;
}

@keyframes slideDown {
    from {
        opacity: 0;
        max-height: 0;
        transform: translateY(-10px);
    }
    to {
        opacity: 1;
        max-height: 400px;
        transform: translateY(0);
    }
}

.group-list-items {
    animation: fadeIn 0.3s ease-out;
}

/* 侧边栏导航样式 */
.sidebar {
    display: none;  /* 暂时隐藏侧边菜单 */
    width: 250px;
    background: white;
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-lg);
    padding: var(--spacing-md);
    position: sticky;
    top: var(--spacing-md);
    max-height: calc(100vh - var(--spacing-md) * 2);
    /* display: flex; */
    flex-direction: column;
    transition: width var(--transition-base);
    flex-shrink: 0;
}

.sidebar.collapsed {
    width: 60px;
}

.sidebar-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: var(--spacing-md);
    border-bottom: 1px solid var(--gray-200);
    margin-bottom: var(--spacing-md);
}

.sidebar-header h3 {
    margin: 0;
    font-size: 18px;
    font-weight: 600;
    color: var(--gray-800);
    white-space: nowrap;
    overflow: hidden;
}

.sidebar.collapsed .sidebar-header h3 {
    display: none;
}

.sidebar-toggle {
    background: none;
    border: none;
    font-size: 20px;
    cursor: pointer;
    color: var(--gray-600);
    padding: 4px 8px;
    border-radius: var(--radius-sm);
    transition: all var(--transition-fast);
}

.sidebar-toggle:hover {
    background: var(--gray-100);
    color: var(--gray-800);
}

.sidebar-nav {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-xs);
    overflow-y: auto;
    flex: 1;
}

.nav-item {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    padding: var(--spacing-md);
    border-radius: var(--radius-md);
    color: var(--gray-700);
    text-decoration: none;
    transition: all var(--transition-fast);
    cursor: pointer;
    white-space: nowrap;
}

.nav-item:hover {
    background: var(--gray-100);
    color: var(--primary);
    transform: translateX(4px);
}

.nav-item.active {
    background: linear-gradient(135deg, var(--primary) 0%, var(--secondary) 100%);
    color: white;
    box-shadow: var(--shadow-md);
}

.nav-item.active:hover {
    transform: translateX(4px);
    box-shadow: var(--shadow-lg);
}

.nav-icon {
    font-size: 20px;
    flex-shrink: 0;
    width: 24px;
    text-align: center;
}

.nav-text {
    font-size: 14px;
    font-weight: 500;
    flex: 1;
}

.sidebar.collapsed .nav-text {
    display: none;
}

.nav-divider {
    height: 1px;
    background: var(--gray-200);
    margin: var(--spacing-sm) 0;
}

.sidebar.collapsed .nav-divider {
    margin: var(--spacing-xs) var(--spacing-md);
}

.permission-icon {
    font-size: 28px;
    flex-shrink: 0;
    filter: drop-shadow(0 2px 4px rgba(0,0,0,0.1));
}

.permission-text {
    flex: 1;
}

.permission-text strong {
    display: block;
    color: #1976D2;
    font-size: 16px;
    font-weight: 700;
    margin-bottom: var(--spacing-xs);
}

.permission-text p {
    color: #424242;
    font-size: 14px;
    margin: 0;
    line-height: 1.5;
}

.permission-text span {
    color: #1976D2;
    font-weight: 700;
}

/* 群组列表提示样式 */
.group-list-hint {
    animation: fadeIn 0.3s ease-in;
}

@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(-5px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* 响应式优化 */
@media (max-width: 1024px) {
    .container {
        padding: 0 var(--spacing-sm);
    }
    
    .header {
        flex-direction: column;
        align-items: flex-start;
    }
    
    .header h1 {
        font-size: 24px;
    }
    
    .form-row {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 768px) {
    body {
        padding: var(--spacing-sm);
    }
    
    .login-container {
        margin: var(--spacing-xl) auto;
        padding: var(--spacing-xl);
    }
    
    .header {
        padding: var(--spacing-md);
    }
    
    .header h1 {
        font-size: 22px;
    }
    
    .function-page {
        padding: var(--spacing-md);
    }
    
    .menu-grid,
    .menu-grid.compact {
        grid-template-columns: 1fr;
        gap: var(--spacing-md);
    }
    
    .stats-grid {
        grid-template-columns: 1fr;
    }

    .stats-controls {
        justify-content: flex-start;
    }

    .group-links {
        margin-left: 8px;
    }
    
    .menu-card {
        padding: var(--spacing-lg);
    }
    
    .table-container {
        font-size: 12px;
    }
    
    th, td {
        padding: var(--spacing-sm);
    }
    
    .btn {
        padding: 8px 16px;
        font-size: 13px;
    }
}

@media (max-width: 480px) {
    .login-container {
        margin: var(--spacing-md) auto;
        padding: var(--spacing-lg);
    }
    
    .login-container h2 {
        font-size: 24px;
    }
    
    .header h1 {
        font-size: 20px;
    }
    
    .function-page h2 {
        font-size: 22px;
    }
    
    .user-info {
        width: 100%;
        justify-content: space-between;
    }
}

/* 同步管理员操作下拉菜单样式 */
.sync-actions-dropdown {
    position: relative;
    display: inline-block;
}

.sync-actions-button {
    width: auto;
    min-width: 120px;
    padding: 6px 12px;
    border: 1px solid #667eea;
    border-radius: 4px;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    cursor: pointer;
    font-size: 0.85em;
    font-weight: 500;
    text-align: center;
    display: inline-flex;
    justify-content: center;
    align-items: center;
    transition: all 0.2s;
    white-space: nowrap;
}

.sync-actions-button:hover {
    background: linear-gradient(135deg, #5568d3 0%, #6a3a8f 100%);
    box-shadow: 0 2px 8px rgba(102, 126, 234, 0.3);
}

.sync-actions-button:after {
    content: '▼';
    font-size: 0.7em;
    margin-left: 8px;
    transition: transform 0.2s;
    color: white;
}

.sync-actions-button.open:after {
    transform: rotate(180deg);
}

.sync-actions-menu {
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    background: white;
    border: 1px solid #ddd;
    border-radius: 4px;
    box-shadow: 0 4px 12px rgba(0,0,0,0.15);
    z-index: 1000;
    margin-top: 2px;
    display: none;
    padding: 8px 0;
}

.sync-actions-menu.open {
    display: block;
}

.sync-actions-menu-item {
    padding: 8px 15px;
    cursor: pointer;
    display: flex;
    align-items: center;
    gap: 8px;
    transition: background 0.2s;
    font-size: 0.9em;
}

.sync-actions-menu-item:hover {
    background: #f8f9fa;
}

.sync-actions-menu-item input[type="checkbox"] {
    width: 16px;
    height: 16px;
    cursor: pointer;
}

.sync-actions-menu-item label {
    cursor: pointer;
    margin: 0;
    flex: 1;
    user-select: none;
}

/* 额外的工具类 */
.btn-full-width {
    width: 100%;
}

.divider {
    margin: var(--spacing-lg) 0;
    text-align: center;
    position: relative;
}

.divider::before {
    content: '';
    position: absolute;
    top: 50%;
    left: 0;
    right: 0;
    border-top: 1px solid var(--gray-300);
}

.divider span {
    background: white;
    padding: 0 var(--spacing-md);
    color: var(--gray-500);
    position: relative;
    font-size: 14px;
}

.telegram-login-panel {
    border: 1px solid #dbeafe;
    background: linear-gradient(135deg, #eef2ff 0%, #f5f3ff 100%);
    border-radius: var(--radius-lg);
    padding: var(--spacing-lg);
    text-align: center;
    margin-bottom: var(--spacing-lg);
    box-shadow: var(--shadow-sm);
}

.telegram-login-title {
    font-size: 18px;
    font-weight: 700;
    color: var(--gray-800);
    margin-bottom: var(--spacing-sm);
}

.telegram-login-subtitle {
    font-size: 13px;
    color: var(--gray-600);
    margin-bottom: var(--spacing-md);
}

.telegram-login-widget {
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: 48px;
}

.bind-notice {
    margin: var(--spacing-lg) 0;
    padding: var(--spacing-lg);
    background: #fff7ed;
    border: 1px solid #fed7aa;
    border-left: 4px solid var(--warning);
    border-radius: var(--radius-lg);
}

.bind-notice-header {
    font-size: 16px;
    font-weight: 700;
    color: #9a3412;
    margin-bottom: var(--spacing-sm);
}

.bind-notice-footnote {
    margin-top: var(--spacing-sm);
    font-size: 12px;
    color: #7c6f4d;
}

body.needs-tg-bind .menu-grid,
body.needs-tg-bind #permissionHint,
body.needs-tg-bind #menuDetailedStats {
    display: none !important;
}

.form-section {
    margin-bottom: var(--spacing-xl);
    padding: var(--spacing-lg);
    background: var(--gray-50);
    border-radius: var(--radius-lg);
    border: 1px solid var(--gray-200);
}

.form-section h3 {
    margin-top: 0;
    color: var(--gray-800);
    font-size: 18px;
    font-weight: 600;
    margin-bottom: var(--spacing-md);
}

.toolbar {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    flex-wrap: wrap;
    margin-bottom: var(--spacing-lg);
}

.toolbar-group {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    flex-wrap: wrap;
}

.toolbar-label {
    font-weight: 600;
    color: var(--gray-700);
    font-size: 14px;
}

.group-list-container {
    max-height: 400px;
    overflow-y: auto;
    border: 1px solid var(--gray-200);
    padding: var(--spacing-md);
    border-radius: var(--radius-md);
    background: white;
}

.group-list-container.compact {
    max-height: 200px;
}

.error-message {
    margin-top: var(--spacing-md);
    color: var(--danger);
    display: none;
    font-size: 14px;
    padding: var(--spacing-sm) var(--spacing-md);
    background: #fef2f2;
    border-radius: var(--radius-sm);
    border-left: 3px solid var(--danger);
}

.info-box {
    margin-bottom: var(--spacing-md);
    padding: var(--spacing-md);
    background: var(--gray-100);
    border-radius: var(--radius-md);
    color: var(--gray-600);
    font-size: 0.9em;
    line-height: 1.6;
}

.info-box strong {
    color: var(--gray-800);
}

.status-badge {
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-xs);
    padding: var(--spacing-xs) var(--spacing-sm);
    border-radius: var(--radius-full);
    font-size: 12px;
    font-weight: 600;
}

.status-badge.online {
    background: #d1fae5;
    color: #065f46;
}

.status-badge.offline {
    background: #fee2e2;
    color: #991b1b;
}

/* 滚动条样式 */
::-webkit-scrollbar {
    width: 8px;
    height: 8px;
}

::-webkit-scrollbar-track {
    background: var(--gray-100);
    border-radius: var(--radius-sm);
}

::-webkit-scrollbar-thumb {
    background: var(--gray-400);
    border-radius: var(--radius-sm);
}

::-webkit-scrollbar-thumb:hover {
    background: var(--gray-500);
}

/* 选择文本样式 */
::selection {
    background: var(--primary);
    color: white;
}

::-moz-selection {
    background: var(--primary);
    color: white;
}

/* 群组标签样式优化 */
.group-tag {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    margin: 4px 6px 4px 0;
    padding: 8px 12px;
    background: linear-gradient(135deg, #e3f2fd 0%, #bbdefb 100%);
    border: 1px solid #90caf9;
    border-radius: var(--radius-md);
    font-size: 13px;
    line-height: 1.4;
    position: relative;
    transition: all var(--transition-base);
    box-shadow: var(--shadow-sm);
}

.group-tag:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
    border-color: var(--primary);
}

.group-tag strong {
    color: var(--gray-800);
    font-weight: 600;
}

.group-tag small {
    color: var(--gray-600);
    font-size: 11px;
}

.group-tag button {
    position: absolute;
    top: -6px;
    right: -6px;
    background: var(--danger);
    color: white;
    border: none;
    border-radius: 50%;
    width: 20px;
    height: 20px;
    font-size: 12px;
    line-height: 1;
    cursor: pointer;
    padding: 0;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all var(--transition-base);
    box-shadow: var(--shadow-sm);
    font-weight: bold;
}

.group-tag button:hover {
    background: var(--danger-dark);
    transform: scale(1.1);
    box-shadow: var(--shadow-md);
}

/* 白名单标签样式 */
.group-tag.whitelist-tag {
    background: linear-gradient(135deg, #e8f5e9 0%, #c8e6c9 100%);
    border-color: #81c784;
}

.group-tag.whitelist-tag:hover {
    border-color: var(--success);
}

/* 黑名单群组折叠容器 */
.blacklist-groups-container {
    display: flex;
    flex-direction: column;
    gap: 4px;
}

.blacklist-groups-visible,
.blacklist-groups-collapsed {
    display: flex;
    flex-wrap: wrap;
    gap: 4px;
}

.blacklist-toggle-btn {
    background: none !important;
    border: none !important;
    padding: 4px 8px !important;
    font-size: 12px !important;
    color: var(--primary) !important;
    cursor: pointer;
    text-decoration: none !important;
    transition: all var(--transition-base);
    align-self: flex-start;
    margin-top: 4px;
}

.blacklist-toggle-btn:hover {
    color: var(--primary-dark) !important;
    text-decoration: underline !important;
}

.blacklist-toggle-btn .toggle-text {
    display: inline-flex;
    align-items: center;
    gap: 4px;
}

.blacklist-toggle-btn .toggle-text::before {
    content: '▼';
    font-size: 10px;
    transition: transform var(--transition-base);
}

.blacklist-toggle-btn.expanded .toggle-text::before {
    transform: rotate(180deg);
}

/* 搜索框容器优化 */
.search-container {
    background: white;
    padding: var(--spacing-md);
    border-radius: var(--radius-lg);
    border: 1px solid var(--gray-200);
    box-shadow: var(--shadow-sm);
    margin-bottom: var(--spacing-lg);
}

.search-container .search-input-wrapper {
    position: relative;
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
}

.search-container .search-icon {
    position: absolute;
    left: 12px;
    color: var(--gray-400);
    pointer-events: none;
    font-size: 16px;
}

.search-container input[type="text"] {
    width: 100%;
    padding: 10px 12px 10px 38px;
    border: 2px solid var(--gray-200);
    border-radius: var(--radius-md);
    font-size: 14px;
    transition: all var(--transition-base);
    background: var(--gray-50);
}

.search-container input[type="text"]:focus {
    outline: none;
    border-color: var(--primary);
    background: white;
    box-shadow: 0 0 0 3px rgba(102, 126, 234, 0.1);
}

/* 增强版搜索容器 */
.search-container-enhanced {
    background: white;
    padding: var(--spacing-lg);
    border-radius: var(--radius-lg);
    border: 1px solid var(--gray-200);
    box-shadow: var(--shadow-md);
    margin-bottom: var(--spacing-lg);
}

.search-input-wrapper-enhanced {
    position: relative;
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    flex-wrap: wrap;
}

.search-input-wrapper-enhanced .search-icon {
    position: absolute;
    left: 16px;
    color: var(--gray-400);
    pointer-events: none;
    font-size: 18px;
    z-index: 1;
}

.search-input-wrapper-enhanced input[type="text"] {
    flex: 1;
    min-width: 300px;
    padding: 14px 16px 14px 48px;
    border: 2px solid var(--gray-200);
    border-radius: var(--radius-md);
    font-size: 15px;
    transition: all var(--transition-base);
    background: var(--gray-50);
    color: var(--gray-800);
}

.search-input-wrapper-enhanced input[type="text"]:focus {
    outline: none;
    border-color: var(--primary);
    background: white;
    box-shadow: 0 0 0 4px rgba(102, 126, 234, 0.15);
    transform: translateY(-1px);
}

.search-input-wrapper-enhanced input[type="text"]::placeholder {
    color: var(--gray-400);
}

.search-input-wrapper-enhanced .btn-sm {
    padding: 12px 20px;
    font-size: 14px;
    border-radius: var(--radius-md);
    white-space: nowrap;
    transition: all var(--transition-base);
}

.search-input-wrapper-enhanced .btn-sm:hover {
    transform: translateY(-1px);
    box-shadow: var(--shadow-md);
}

/* 表格行优化 */
.table-row-hover {
    transition: all var(--transition-fast);
}

.table-row-hover:hover {
    background: linear-gradient(90deg, var(--gray-50) 0%, white 100%);
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.05);
}

/* 统计徽章样式 */
.badge {
    display: inline-flex;
    align-items: center;
    padding: 4px 10px;
    border-radius: var(--radius-full);
    font-size: 12px;
    font-weight: 600;
    white-space: nowrap;
}

.badge-primary {
    background: linear-gradient(135deg, var(--primary) 0%, var(--primary-dark) 100%);
    color: white;
}

.badge-success {
    background: linear-gradient(135deg, var(--success) 0%, var(--success-dark) 100%);
    color: white;
}

.badge-danger {
    background: linear-gradient(135deg, var(--danger) 0%, var(--danger-dark) 100%);
    color: white;
}

.badge-warning {
    background: linear-gradient(135deg, var(--warning) 0%, var(--warning-dark) 100%);
    color: white;
}

.badge-info {
    background: linear-gradient(135deg, var(--info) 0%, var(--info-dark) 100%);
    color: white;
}

/* 操作按钮组优化 */
.action-buttons-group {
    display: flex;
    gap: var(--spacing-sm);
    flex-wrap: wrap;
    align-items: center;
}

/* 工具栏优化 */
.toolbar-enhanced {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    flex-wrap: wrap;
    padding: var(--spacing-md);
    background: var(--gray-50);
    border-radius: var(--radius-lg);
    border: 1px solid var(--gray-200);
    margin-bottom: var(--spacing-lg);
}

/* 表单区域优化 */
.form-section-enhanced {
    margin-bottom: var(--spacing-xl);
    padding: var(--spacing-xl);
    background: white;
    border-radius: var(--radius-lg);
    border: 1px solid var(--gray-200);
    box-shadow: var(--shadow-sm);
    transition: all var(--transition-base);
}

.form-section-enhanced:hover {
    box-shadow: var(--shadow-md);
}

.form-section-enhanced h3 {
    margin-top: 0;
    margin-bottom: var(--spacing-lg);
    color: var(--gray-800);
    font-size: 20px;
    font-weight: 600;
    padding-bottom: var(--spacing-sm);
    border-bottom: 2px solid var(--gray-100);
}

/* 群组列表容器优化 */
.group-list-container-enhanced {
    max-height: 300px;
    overflow-y: auto;
    border: 1px solid var(--gray-200);
    padding: var(--spacing-md);
    border-radius: var(--radius-md);
    background: white;
    box-shadow: var(--shadow-sm);
}

.group-list-item {
    display: flex;
    align-items: center;
    padding: var(--spacing-sm) var(--spacing-md);
    border: 1px solid var(--gray-200);
    border-radius: var(--radius-sm);
    margin-bottom: var(--spacing-xs);
    cursor: pointer;
    transition: all var(--transition-fast);
    background: white;
}

.group-list-item:hover {
    background: var(--gray-50);
    border-color: var(--primary);
    transform: translateX(4px);
    box-shadow: var(--shadow-sm);
}

.group-list-item input[type="checkbox"] {
    margin-right: var(--spacing-sm);
    width: 18px;
    height: 18px;
    cursor: pointer;
    accent-color: var(--primary);
}

/* 空状态样式 */
.empty-state {
    text-align: center;
    padding: var(--spacing-2xl);
    color: var(--gray-500);
}

.empty-state-icon {
    font-size: 48px;
    margin-bottom: var(--spacing-md);
    opacity: 0.5;
}

.empty-state-text {
    font-size: 16px;
    font-weight: 500;
}

/* 数据看板样式 */
.dashboard-card {
    background: white;
    padding: 24px;
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-md);
    color: white;
    text-align: center;
    transition: transform var(--transition-base), box-shadow var(--transition-base);
    position: relative;
    overflow: hidden;
}

.dashboard-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(255, 255, 255, 0.1);
    opacity: 0;
    transition: opacity var(--transition-base);
}

.dashboard-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-xl);
}

.dashboard-card:hover::before {
    opacity: 1;
}

.dashboard-card-icon {
    font-size: 36px;
    margin-bottom: 12px;
    opacity: 0.9;
}

.dashboard-card-label {
    font-size: 14px;
    opacity: 0.9;
    margin-bottom: 8px;
    font-weight: 500;
}

.dashboard-card-value {
    font-size: 32px;
    font-weight: 700;
    line-height: 1.2;
}

.dashboard-card-small {
    background: white;
    padding: 20px;
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-sm);
    border: 1px solid var(--gray-200);
    text-align: center;
    transition: all var(--transition-base);
}

.dashboard-card-small:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
    border-color: var(--primary);
}

.dashboard-card-small-icon {
    font-size: 28px;
    margin-bottom: 8px;
    color: var(--primary);
}

.dashboard-card-small-label {
    font-size: 13px;
    color: var(--gray-600);
    margin-bottom: 8px;
    font-weight: 500;
}

.dashboard-card-small-value {
    font-size: 24px;
    font-weight: 700;
    color: var(--gray-800);
    line-height: 1.2;
}

/* 模态框样式 */
.modal {
    display: none;
    position: fixed;
    z-index: 1000;
    left: 0;
    top: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0, 0, 0, 0.5);
    backdrop-filter: blur(4px);
    justify-content: center;
    align-items: center;
    animation: fadeIn var(--transition-base);
}

.modal-content {
    background-color: white;
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-xl);
    max-width: 90%;
    max-height: 90vh;
    overflow: hidden;
    display: flex;
    flex-direction: column;
    animation: slideUp var(--transition-base);
}

.modal-header {
    padding: var(--spacing-lg);
    border-bottom: 1px solid var(--gray-200);
    display: flex;
    justify-content: space-between;
    align-items: center;
    background: linear-gradient(135deg, var(--primary) 0%, var(--secondary) 100%);
    color: white;
}

.modal-header h3 {
    margin: 0;
    font-size: 20px;
    font-weight: 600;
}

.modal-close {
    background: none;
    border: none;
    color: white;
    font-size: 28px;
    cursor: pointer;
    padding: 0;
    width: 32px;
    height: 32px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: var(--radius-sm);
    transition: all var(--transition-fast);
}

.modal-close:hover {
    background-color: rgba(255, 255, 255, 0.2);
}

.modal-body {
    padding: var(--spacing-lg);
    overflow-y: auto;
    flex: 1;
}

/* 媒体占位符样式 */
.media-placeholder {
    user-select: none;
    transition: all var(--transition-base);
}

.media-placeholder:hover {
    transform: scale(1.02);
}

.media-placeholder:active {
    transform: scale(0.98);
}

/* 延迟加载的头像样式 */
img.lazy-avatar {
    opacity: 0;
    transition: opacity 0.3s ease-in;
}

img.lazy-avatar[src] {
    opacity: 1;
}

img.lazy-avatar:not([src]) {
    background: linear-gradient(135deg, #f0f0f0 0%, #e0e0e0 100%);
}

/* 选项卡样式 */
.tabs {
    display: flex;
    gap: var(--spacing-sm);
    border-bottom: 2px solid var(--gray-200);
    padding-bottom: var(--spacing-sm);
    flex-wrap: wrap;
}

.tab-btn {
    padding: var(--spacing-sm) var(--spacing-md);
    border: none;
    background: transparent;
    color: var(--gray-600);
    font-size: 14px;
    font-weight: 500;
    cursor: pointer;
    border-radius: var(--radius-md) var(--radius-md) 0 0;
    transition: all var(--transition-fast);
    position: relative;
}

.tab-btn:hover {
    background: var(--gray-100);
    color: var(--gray-800);
}

.tab-btn.active {
    color: var(--primary);
    background: var(--gray-50);
}

.tab-btn.active::after {
    content: '';
    position: absolute;
    bottom: -2px;
    left: 0;
    right: 0;
    height: 2px;
    background: var(--primary);
    border-radius: 2px 2px 0 0;
}

/* 用户操作区块样式 */
.user-action-section {
    animation: fadeIn 0.2s ease-in-out;
}

@keyframes fadeIn {
    from { opacity: 0; transform: translateY(10px); }
    to { opacity: 1; transform: translateY(0); }
}

/* 警告提示框 */
.alert-warning {
    background-color: #fff3cd;
    border: 1px solid #ffeeba;
    color: #856404;
    padding: var(--spacing-md);
    border-radius: var(--radius-md);
}

/* 按钮-警告色 */
.btn-warning {
    background: linear-gradient(135deg, var(--warning) 0%, var(--warning-dark) 100%);
    color: white;
    border: none;
}

.btn-warning:hover {
    background: linear-gradient(135deg, var(--warning-dark) 0%, #b45309 100%);
    transform: translateY(-1px);
}