/**
 * 下雪电竞 - 主样式文件
 * 豪华大气的设计风格
 */

/* CSS变量定义 - 日间模式 */
:root {
    /* 主色调 */
    --primary: #667eea;
    --primary-light: #7c93ff;
    --primary-dark: #5166d6;
    --secondary: #764ba2;
    --accent: #f093fb;
    
    /* 渐变色 */
    --gradient-primary: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    --gradient-secondary: linear-gradient(135deg, #f093fb 0%, #f5576c 100%);
    --gradient-success: linear-gradient(135deg, #11998e 0%, #38ef7d 100%);
    --gradient-warning: linear-gradient(135deg, #F2994A 0%, #F2C94C 100%);
    --gradient-danger: linear-gradient(135deg, #eb3349 0%, #f45c43 100%);
    --gradient-info: linear-gradient(135deg, #00c6fb 0%, #005bea 100%);
    --gradient-dark: linear-gradient(135deg, #0d1117 0%, #161b22 100%);
    --gradient-snow: linear-gradient(135deg, #e0e5ec 0%, #ffffff 50%, #e0e5ec 100%);
    
    /* 背景色 */
    --bg-primary: #f0f2f5;
    --bg-secondary: #ffffff;
    --bg-tertiary: #f8fafc;
    --bg-card: #ffffff;
    --bg-sidebar: linear-gradient(180deg, #1a1f2e 0%, #0d1117 100%);
    --bg-header: rgba(255, 255, 255, 0.95);
    --bg-input: #f5f7fa;
    --bg-hover: rgba(102, 126, 234, 0.08);
    
    /* 文字颜色 */
    --text-primary: #1a1a2e;
    --text-secondary: #64748b;
    --text-tertiary: #94a3b8;
    --text-inverse: #ffffff;
    --text-link: #667eea;
    
    /* 边框颜色 */
    --border-color: #e2e8f0;
    --border-light: #f1f5f9;
    --border-focus: #667eea;
    
    /* 阴影 */
    --shadow-sm: 0 1px 2px 0 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-md: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
    --shadow-lg: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 10px 10px -5px rgba(0, 0, 0, 0.04);
    --shadow-xl: 0 25px 50px -12px rgba(0, 0, 0, 0.25);
    --shadow-glow: 0 0 40px rgba(102, 126, 234, 0.3);
    --shadow-card: 0 4px 20px rgba(0, 0, 0, 0.08);
    
    /* 状态颜色 */
    --success: #10b981;
    --warning: #f59e0b;
    --danger: #ef4444;
    --info: #3b82f6;
    
    /* 圆角 */
    --radius-sm: 6px;
    --radius: 10px;
    --radius-md: 12px;
    --radius-lg: 16px;
    --radius-xl: 20px;
    --radius-full: 9999px;
    
    /* 间距 */
    --space-xs: 4px;
    --space-sm: 8px;
    --space-md: 16px;
    --space-lg: 24px;
    --space-xl: 32px;
    --space-2xl: 48px;
    
    /* 过渡 */
    --transition-fast: 0.15s ease;
    --transition: 0.3s ease;
    --transition-slow: 0.5s ease;
    
    /* 侧边栏宽度 */
    --sidebar-width: 280px;
    --sidebar-collapsed-width: 80px;
    
    /* 字体 */
    --font-family: 'Noto Sans SC', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
}

/* 夜间模式 */
[data-theme="dark"] {
    --bg-primary: #0d1117;
    --bg-secondary: #161b22;
    --bg-tertiary: #21262d;
    --bg-card: #161b22;
    --bg-sidebar: linear-gradient(180deg, #0d1117 0%, #010409 100%);
    --bg-header: rgba(22, 27, 34, 0.95);
    --bg-input: #21262d;
    --bg-hover: rgba(102, 126, 234, 0.15);
    
    --text-primary: #f0f6fc;
    --text-secondary: #8b949e;
    --text-tertiary: #6e7681;
    
    --border-color: #30363d;
    --border-light: #21262d;
    
    --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.3);
    --shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.4);
    --shadow-md: 0 10px 15px -3px rgba(0, 0, 0, 0.5);
    --shadow-lg: 0 20px 25px -5px rgba(0, 0, 0, 0.6);
    --shadow-card: 0 4px 20px rgba(0, 0, 0, 0.4);
}

/* 基础样式重置 */
*, *::before, *::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

html {
    scroll-behavior: smooth;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

body {
    font-family: var(--font-family);
    font-size: 14px;
    line-height: 1.6;
    color: var(--text-primary);
    background-color: var(--bg-primary);
    min-height: 100vh;
    overflow-x: hidden;
}

a {
    color: var(--text-link);
    text-decoration: none;
    transition: var(--transition-fast);
}

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

img {
    max-width: 100%;
    height: auto;
}

button {
    cursor: pointer;
    font-family: inherit;
    border: none;
    background: none;
}

input, select, textarea {
    font-family: inherit;
    font-size: inherit;
}

/* 滚动条美化 */
::-webkit-scrollbar {
    width: 8px;
    height: 8px;
}

::-webkit-scrollbar-track {
    background: var(--bg-tertiary);
    border-radius: var(--radius-full);
}

::-webkit-scrollbar-thumb {
    background: var(--border-color);
    border-radius: var(--radius-full);
    transition: var(--transition);
}

::-webkit-scrollbar-thumb:hover {
    background: var(--text-tertiary);
}

/* 选中文本样式 */
::selection {
    background: var(--primary);
    color: var(--text-inverse);
}

/* ==================== 通用类 ==================== */

/* 文字颜色 */
.text-primary { color: var(--primary) !important; }
.text-success { color: var(--success) !important; }
.text-warning { color: var(--warning) !important; }
.text-danger { color: var(--danger) !important; }
.text-info { color: var(--info) !important; }
.text-muted { color: var(--text-tertiary) !important; }
.text-secondary { color: var(--text-secondary) !important; }

/* 背景色 */
.bg-primary { background: var(--gradient-primary) !important; }
.bg-success { background: var(--gradient-success) !important; }
.bg-warning { background: var(--gradient-warning) !important; }
.bg-danger { background: var(--gradient-danger) !important; }
.bg-info { background: var(--gradient-info) !important; }

/* 间距 */
.mt-1 { margin-top: var(--space-sm); }
.mt-2 { margin-top: var(--space-md); }
.mt-3 { margin-top: var(--space-lg); }
.mt-4 { margin-top: var(--space-xl); }
.mb-1 { margin-bottom: var(--space-sm); }
.mb-2 { margin-bottom: var(--space-md); }
.mb-3 { margin-bottom: var(--space-lg); }
.mb-4 { margin-bottom: var(--space-xl); }
.my-2 { margin-top: var(--space-md); margin-bottom: var(--space-md); }
.my-3 { margin-top: var(--space-lg); margin-bottom: var(--space-lg); }

.p-1 { padding: var(--space-sm); }
.p-2 { padding: var(--space-md); }
.p-3 { padding: var(--space-lg); }
.p-4 { padding: var(--space-xl); }

/* Flex 工具类 */
.d-flex { display: flex; }
.flex-wrap { flex-wrap: wrap; }
.align-center { align-items: center; }
.justify-center { justify-content: center; }
.justify-between { justify-content: space-between; }
.justify-end { justify-content: flex-end; }
.flex-1 { flex: 1; }
.gap-1 { gap: var(--space-sm); }
.gap-2 { gap: var(--space-md); }
.gap-3 { gap: var(--space-lg); }

/* Grid 工具类 */
.grid { display: grid; }
.grid-2 { grid-template-columns: repeat(2, 1fr); }
.grid-3 { grid-template-columns: repeat(3, 1fr); }
.grid-4 { grid-template-columns: repeat(4, 1fr); }

/* 显示隐藏 */
.hidden { display: none !important; }
.visible { display: block !important; }

/* 文本对齐 */
.text-center { text-align: center; }
.text-right { text-align: right; }
.text-left { text-align: left; }

/* 字体大小 */
.fs-sm { font-size: 12px; }
.fs-md { font-size: 14px; }
.fs-lg { font-size: 16px; }
.fs-xl { font-size: 18px; }
.fs-2xl { font-size: 24px; }
.fs-3xl { font-size: 32px; }

/* 字重 */
.fw-normal { font-weight: 400; }
.fw-medium { font-weight: 500; }
.fw-bold { font-weight: 700; }

/* 圆角 */
.rounded { border-radius: var(--radius); }
.rounded-lg { border-radius: var(--radius-lg); }
.rounded-full { border-radius: var(--radius-full); }

/* 阴影 */
.shadow { box-shadow: var(--shadow); }
.shadow-md { box-shadow: var(--shadow-md); }
.shadow-lg { box-shadow: var(--shadow-lg); }

/* ==================== 按钮样式 ==================== */

.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 10px 20px;
    font-size: 14px;
    font-weight: 500;
    line-height: 1.5;
    border-radius: var(--radius);
    transition: var(--transition);
    cursor: pointer;
    border: none;
    outline: none;
    white-space: nowrap;
    text-decoration: none;
}

.btn:disabled {
    opacity: 0.6;
    cursor: not-allowed;
}

.btn-primary {
    background: var(--gradient-primary);
    color: var(--text-inverse);
    box-shadow: 0 4px 15px rgba(102, 126, 234, 0.4);
}

.btn-primary:hover:not(:disabled) {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(102, 126, 234, 0.5);
}

.btn-secondary {
    background: var(--bg-tertiary);
    color: var(--text-primary);
    border: 1px solid var(--border-color);
}

.btn-secondary:hover:not(:disabled) {
    background: var(--bg-hover);
    border-color: var(--primary);
    color: var(--primary);
}

.btn-success {
    background: var(--gradient-success);
    color: var(--text-inverse);
    box-shadow: 0 4px 15px rgba(16, 185, 129, 0.4);
}

.btn-success:hover:not(:disabled) {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(16, 185, 129, 0.5);
}

.btn-warning {
    background: var(--gradient-warning);
    color: var(--text-inverse);
    box-shadow: 0 4px 15px rgba(245, 158, 11, 0.4);
}

.btn-danger {
    background: var(--gradient-danger);
    color: var(--text-inverse);
    box-shadow: 0 4px 15px rgba(239, 68, 68, 0.4);
}

.btn-danger:hover:not(:disabled) {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(239, 68, 68, 0.5);
}

.btn-outline {
    background: transparent;
    border: 2px solid var(--primary);
    color: var(--primary);
}

.btn-outline:hover:not(:disabled) {
    background: var(--primary);
    color: var(--text-inverse);
}

.btn-ghost {
    background: transparent;
    color: var(--text-secondary);
}

.btn-ghost:hover:not(:disabled) {
    background: var(--bg-hover);
    color: var(--primary);
}

.btn-sm {
    padding: 6px 12px;
    font-size: 12px;
}

.btn-lg {
    padding: 14px 28px;
    font-size: 16px;
}

.btn-block {
    width: 100%;
}

.btn-icon {
    width: 40px;
    height: 40px;
    padding: 0;
    border-radius: var(--radius);
}

.btn-icon.btn-sm {
    width: 32px;
    height: 32px;
}

/* ==================== 表单样式 ==================== */

.form-group {
    margin-bottom: var(--space-md);
}

.form-label {
    display: block;
    margin-bottom: 8px;
    font-weight: 500;
    color: var(--text-primary);
}

.form-label.required::after {
    content: '*';
    color: var(--danger);
    margin-left: 4px;
}

.form-control {
    width: 100%;
    padding: 12px 16px;
    font-size: 14px;
    line-height: 1.5;
    color: var(--text-primary);
    background-color: var(--bg-input);
    border: 2px solid var(--border-color);
    border-radius: var(--radius);
    transition: var(--transition);
    outline: none;
}

.form-control:focus {
    border-color: var(--primary);
    background-color: var(--bg-secondary);
    box-shadow: 0 0 0 4px rgba(102, 126, 234, 0.1);
}

.form-control::placeholder {
    color: var(--text-tertiary);
}

.form-control:disabled {
    background-color: var(--bg-tertiary);
    cursor: not-allowed;
    opacity: 0.7;
}

.form-control.is-invalid {
    border-color: var(--danger);
}

.form-control.is-valid {
    border-color: var(--success);
}

textarea.form-control {
    min-height: 120px;
    resize: vertical;
}

select.form-control {
    appearance: none;
    background-image: url("data:image/svg+xml,%3csvg xmlns='http://www.w3.org/2000/svg' fill='none' viewBox='0 0 20 20'%3e%3cpath stroke='%236b7280' stroke-linecap='round' stroke-linejoin='round' stroke-width='1.5' d='M6 8l4 4 4-4'/%3e%3c/svg%3e");
    background-position: right 12px center;
    background-repeat: no-repeat;
    background-size: 20px;
    padding-right: 40px;
}

.form-text {
    display: block;
    margin-top: 6px;
    font-size: 12px;
    color: var(--text-tertiary);
}

.invalid-feedback {
    display: block;
    margin-top: 6px;
    font-size: 12px;
    color: var(--danger);
}

/* 输入框组 */
.input-group {
    display: flex;
    align-items: stretch;
}

.input-group .form-control {
    flex: 1;
    border-radius: 0;
}

.input-group .form-control:first-child {
    border-radius: var(--radius) 0 0 var(--radius);
}

.input-group .form-control:last-child {
    border-radius: 0 var(--radius) var(--radius) 0;
}

.input-group-text {
    display: flex;
    align-items: center;
    padding: 0 16px;
    background: var(--bg-tertiary);
    border: 2px solid var(--border-color);
    color: var(--text-secondary);
    white-space: nowrap;
}

.input-group-text:first-child {
    border-radius: var(--radius) 0 0 var(--radius);
    border-right: none;
}

.input-group-text:last-child {
    border-radius: 0 var(--radius) var(--radius) 0;
    border-left: none;
}

/* 复选框和单选框 */
.form-check {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 8px 0;
}

.form-check-input {
    width: 20px;
    height: 20px;
    flex-shrink: 0;
    accent-color: var(--primary);
    cursor: pointer;
}

.form-check-label {
    cursor: pointer;
    color: var(--text-primary);
}

/* 开关 */
.form-switch {
    display: inline-flex;
    align-items: center;
    gap: 10px;
}

.switch-input {
    position: relative;
    width: 48px;
    height: 26px;
    appearance: none;
    background: var(--border-color);
    border-radius: var(--radius-full);
    cursor: pointer;
    transition: var(--transition);
}

.switch-input::before {
    content: '';
    position: absolute;
    top: 3px;
    left: 3px;
    width: 20px;
    height: 20px;
    background: white;
    border-radius: 50%;
    transition: var(--transition);
    box-shadow: var(--shadow-sm);
}

.switch-input:checked {
    background: var(--primary);
}

.switch-input:checked::before {
    transform: translateX(22px);
}

/* ==================== 卡片样式 ==================== */

.card {
    background: var(--bg-card);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-card);
    overflow: hidden;
    transition: var(--transition);
}

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

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

.card-title {
    font-size: 18px;
    font-weight: 600;
    color: var(--text-primary);
    display: flex;
    align-items: center;
    gap: 10px;
}

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

.card-body {
    padding: var(--space-lg);
}

.card-footer {
    padding: var(--space-md) var(--space-lg);
    border-top: 1px solid var(--border-light);
    background: var(--bg-tertiary);
}

/* 数据卡片 */
.stat-card {
    position: relative;
    padding: var(--space-lg);
    background: var(--bg-card);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-card);
    overflow: hidden;
}

.stat-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 4px;
    height: 100%;
    background: var(--gradient-primary);
}

.stat-card.success::before {
    background: var(--gradient-success);
}

.stat-card.warning::before {
    background: var(--gradient-warning);
}

.stat-card.danger::before {
    background: var(--gradient-danger);
}

.stat-card.info::before {
    background: var(--gradient-info);
}

.stat-icon {
    width: 56px;
    height: 56px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: var(--radius-md);
    font-size: 24px;
    color: var(--text-inverse);
    background: var(--gradient-primary);
    margin-bottom: var(--space-md);
}

.stat-card.success .stat-icon { background: var(--gradient-success); }
.stat-card.warning .stat-icon { background: var(--gradient-warning); }
.stat-card.danger .stat-icon { background: var(--gradient-danger); }
.stat-card.info .stat-icon { background: var(--gradient-info); }

.stat-value {
    font-size: 32px;
    font-weight: 700;
    color: var(--text-primary);
    line-height: 1.2;
}

.stat-label {
    font-size: 14px;
    color: var(--text-secondary);
    margin-top: 4px;
}

.stat-trend {
    display: inline-flex;
    align-items: center;
    gap: 4px;
    font-size: 12px;
    margin-top: 8px;
    padding: 4px 8px;
    border-radius: var(--radius-sm);
}

.stat-trend.up {
    background: rgba(16, 185, 129, 0.1);
    color: var(--success);
}

.stat-trend.down {
    background: rgba(239, 68, 68, 0.1);
    color: var(--danger);
}

/* ==================== 表格样式 ==================== */

.table-container {
    overflow-x: auto;
    background: var(--bg-card);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-card);
}

.table {
    width: 100%;
    border-collapse: collapse;
}

.table th,
.table td {
    padding: 14px 16px;
    text-align: left;
    border-bottom: 1px solid var(--border-light);
}

.table th {
    background: var(--bg-tertiary);
    font-weight: 600;
    color: var(--text-secondary);
    font-size: 12px;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    white-space: nowrap;
}

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

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

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

.table .actions {
    display: flex;
    gap: 8px;
    justify-content: flex-end;
}

/* ==================== 徽章样式 ==================== */

.badge {
    display: inline-flex;
    align-items: center;
    gap: 4px;
    padding: 4px 10px;
    font-size: 12px;
    font-weight: 500;
    border-radius: var(--radius-full);
    white-space: nowrap;
}

.badge-primary {
    background: rgba(102, 126, 234, 0.15);
    color: var(--primary);
}

.badge-success {
    background: rgba(16, 185, 129, 0.15);
    color: var(--success);
}

.badge-warning {
    background: rgba(245, 158, 11, 0.15);
    color: var(--warning);
}

.badge-danger {
    background: rgba(239, 68, 68, 0.15);
    color: var(--danger);
}

.badge-info {
    background: rgba(59, 130, 246, 0.15);
    color: var(--info);
}

.badge-secondary {
    background: var(--bg-tertiary);
    color: var(--text-secondary);
}

/* 角色徽章 */
.role-badge {
    display: inline-flex;
    align-items: center;
    padding: 4px 12px;
    font-size: 12px;
    font-weight: 500;
    border-radius: var(--radius-full);
}

.role-badge.admin {
    background: var(--gradient-danger);
    color: white;
}

.role-badge.assistant {
    background: var(--gradient-info);
    color: white;
}

.role-badge.service {
    background: var(--gradient-success);
    color: white;
}

.role-badge.player {
    background: var(--gradient-primary);
    color: white;
}

/* ==================== 分页样式 ==================== */

.pagination-wrapper {
    display: flex;
    justify-content: center;
    margin-top: var(--space-lg);
}

.pagination {
    display: flex;
    list-style: none;
    gap: 6px;
}

.page-item {
    display: inline-block;
}

.page-link {
    display: flex;
    align-items: center;
    justify-content: center;
    min-width: 38px;
    height: 38px;
    padding: 0 12px;
    font-size: 14px;
    color: var(--text-secondary);
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius);
    transition: var(--transition-fast);
}

.page-link:hover {
    background: var(--bg-hover);
    border-color: var(--primary);
    color: var(--primary);
}

.page-item.active .page-link {
    background: var(--gradient-primary);
    border-color: transparent;
    color: white;
}

.page-item.disabled .page-link {
    opacity: 0.5;
    cursor: not-allowed;
}

/* ==================== 加载动画 ==================== */

.loading-overlay {
    position: fixed;
    inset: 0;
    background: rgba(0, 0, 0, 0.5);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 9999;
    opacity: 0;
    visibility: hidden;
    transition: var(--transition);
}

.loading-overlay.show {
    opacity: 1;
    visibility: visible;
}

.loading-spinner {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 16px;
    padding: 32px;
    background: var(--bg-card);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-xl);
}

.loading-spinner i {
    font-size: 48px;
    color: var(--primary);
}

.loading-spinner span {
    font-size: 14px;
    color: var(--text-secondary);
}

/* 按钮加载状态 */
.btn.loading {
    pointer-events: none;
    position: relative;
}

.btn.loading::after {
    content: '';
    position: absolute;
    width: 16px;
    height: 16px;
    border: 2px solid transparent;
    border-top-color: currentColor;
    border-radius: 50%;
    animation: spin 0.8s linear infinite;
}

@keyframes spin {
    to { transform: rotate(360deg); }
}

/* ==================== 头像样式 ==================== */

.avatar {
    position: relative;
    width: 40px;
    height: 40px;
    border-radius: 50%;
    overflow: hidden;
    flex-shrink: 0;
}

.avatar img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.avatar-sm { width: 32px; height: 32px; }
.avatar-lg { width: 56px; height: 56px; }
.avatar-xl { width: 80px; height: 80px; }
.avatar-2xl { width: 120px; height: 120px; }

.avatar-group {
    display: flex;
}

.avatar-group .avatar {
    margin-left: -10px;
    border: 2px solid var(--bg-card);
}

.avatar-group .avatar:first-child {
    margin-left: 0;
}

/* 状态点 */
.status-dot {
    position: absolute;
    bottom: 0;
    right: 0;
    width: 12px;
    height: 12px;
    border-radius: 50%;
    border: 2px solid var(--bg-card);
}

.status-dot.online {
    background: var(--success);
}

.status-dot.offline {
    background: var(--text-tertiary);
}

.status-dot.busy {
    background: var(--danger);
}

/* ==================== 标签页 ==================== */

.tabs {
    display: flex;
    gap: 4px;
    padding: 4px;
    background: var(--bg-tertiary);
    border-radius: var(--radius);
    margin-bottom: var(--space-lg);
}

.tab-item {
    flex: 1;
    padding: 10px 20px;
    font-size: 14px;
    font-weight: 500;
    color: var(--text-secondary);
    background: transparent;
    border: none;
    border-radius: var(--radius-sm);
    cursor: pointer;
    transition: var(--transition);
    text-align: center;
}

.tab-item:hover {
    color: var(--primary);
}

.tab-item.active {
    background: var(--bg-card);
    color: var(--primary);
    box-shadow: var(--shadow-sm);
}

.tab-content {
    display: none;
}

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

/* ==================== 空状态 ==================== */

.empty-state {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: var(--space-2xl);
    text-align: center;
}

.empty-state-icon {
    font-size: 64px;
    color: var(--text-tertiary);
    margin-bottom: var(--space-lg);
    opacity: 0.5;
}

.empty-state-title {
    font-size: 18px;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: var(--space-sm);
}

.empty-state-desc {
    font-size: 14px;
    color: var(--text-secondary);
    margin-bottom: var(--space-lg);
}

/* ==================== 动画 ==================== */

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

@keyframes slideUp {
    from { opacity: 0; transform: translateY(20px); }
    to { opacity: 1; transform: translateY(0); }
}

@keyframes slideDown {
    from { opacity: 0; transform: translateY(-20px); }
    to { opacity: 1; transform: translateY(0); }
}

@keyframes scaleIn {
    from { opacity: 0; transform: scale(0.9); }
    to { opacity: 1; transform: scale(1); }
}

@keyframes pulse {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.5; }
}

@keyframes shimmer {
    0% { background-position: -200% 0; }
    100% { background-position: 200% 0; }
}

.animate-fadeIn { animation: fadeIn 0.3s ease; }
.animate-slideUp { animation: slideUp 0.3s ease; }
.animate-slideDown { animation: slideDown 0.3s ease; }
.animate-scaleIn { animation: scaleIn 0.3s ease; }

/* 骨架屏 */
.skeleton {
    background: linear-gradient(90deg, var(--bg-tertiary) 25%, var(--bg-secondary) 50%, var(--bg-tertiary) 75%);
    background-size: 200% 100%;
    animation: shimmer 1.5s infinite;
    border-radius: var(--radius);
}

/* ==================== 响应式 ==================== */

@media (max-width: 1024px) {
    .grid-4 { grid-template-columns: repeat(2, 1fr); }
    .grid-3 { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 768px) {
    .grid-4 { grid-template-columns: 1fr; }
    .grid-3 { grid-template-columns: 1fr; }
    .grid-2 { grid-template-columns: 1fr; }
    
    .d-md-none { display: none !important; }
    
    .table th,
    .table td {
        padding: 10px 12px;
        font-size: 13px;
    }
}

@media (max-width: 480px) {
    :root {
        --space-lg: 16px;
        --space-xl: 24px;
    }
    
    .btn { padding: 8px 16px; }
    .btn-lg { padding: 12px 20px; }
    
    .stat-value { font-size: 24px; }
}