/* ===================================================================
   FreeData - 现代化设计系统
   极简、专业、易用
   =================================================================== */

/* ----- CSS Reset ----- */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { -webkit-text-size-adjust: 100%; -webkit-tap-highlight-color: transparent; }

/* ----- 设计令牌（Design Tokens）----- */
:root {
  /* 主色系 - 靛蓝渐变 */
  /* 黑白简约风 */
  --primary: #111111;
  --primary-light: #333333;
  --primary-dark: #000000;
  --primary-50: #f7f7f7;
  --primary-100: #ebebeb;
  --primary-200: #d4d4d4;

  /* 功能色 */
  /* 黑白简约风 */
  --success: #111111;
  --success-light: #f3f4f6;
  --warning: #111111;
  --warning-light: #f3f4f6;
  --danger: #111111;
  --danger-light: #f3f4f6;
  --info: #111111;
  --info-light: #f3f4f6;

  /* 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;

  /* 语义颜色 */
  --text: var(--gray-800);
  --text-muted: var(--gray-500);
  --text-light: var(--gray-400);
  --border: var(--gray-200);
  --border-light: var(--gray-100);
  --bg: #f7f8fc;
  --card-bg: #ffffff;

  /* 阴影 */
  --shadow-xs: 0 1px 2px 0 rgba(0, 0, 0, 0.04);
  --shadow-sm: 0 1px 3px 0 rgba(0, 0, 0, 0.08), 0 1px 2px 0 rgba(0, 0, 0, 0.04);
  --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.08), 0 2px 4px -1px rgba(0, 0, 0, 0.04);
  --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.08), 0 4px 6px -2px rgba(0, 0, 0, 0.04);
  --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 10px 10px -5px rgba(0, 0, 0, 0.04);
  --shadow-2xl: 0 25px 50px -12px rgba(0, 0, 0, 0.2);

  /* 圆角 */
  --radius-sm: 4px;
  --radius: 6px;
  --radius-md: 8px;
  --radius-lg: 12px;
  --radius-xl: 16px;
  --radius-full: 9999px;

  /* 间距 */
  --space-1: 4px;
  --space-2: 8px;
  --space-3: 12px;
  --space-4: 16px;
  --space-5: 20px;
  --space-6: 24px;
  --space-8: 32px;
  --space-10: 40px;
  --space-12: 48px;

  /* 过渡 */
  --t-fast: 0.15s ease;
  --t-base: 0.2s ease;
  --t-slow: 0.3s ease;
  --t-spring: 0.4s cubic-bezier(0.34, 1.56, 0.64, 1);
}

/* ----- 全局排版 ----- */
body {
  font-family: -apple-system, BlinkMacSystemFont, "PingFang SC", "Hiragino Sans GB",
               "Microsoft YaHei", "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  font-size: 14px;
  line-height: 1.6;
  color: var(--text);
  background: var(--bg);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  text-rendering: optimizeLegibility;
}

h1, h2, h3, h4, h5, h6 {
  font-weight: 600;
  line-height: 1.3;
  color: var(--gray-900);
  letter-spacing: -0.01em;
}

h1 { font-size: 28px; }
h2 { font-size: 22px; }
h3 { font-size: 18px; }
h4 { font-size: 16px; }

a {
  color: var(--primary);
  text-decoration: none;
  transition: color var(--t-fast);
}
a:hover { color: var(--primary-dark); }

p { line-height: 1.7; }

::selection {
  background: var(--primary-200);
  color: var(--primary-dark);
}

/* 滚动条美化 */
::-webkit-scrollbar { width: 8px; height: 8px; }
::-webkit-scrollbar-track { background: transparent; }
::-webkit-scrollbar-thumb {
  background: var(--gray-300);
  border-radius: var(--radius-full);
}
::-webkit-scrollbar-thumb:hover { background: var(--gray-400); }

/* ----- 通用容器 ----- */
.container {
  max-width: 1280px;
  margin: 0 auto;
  padding: 0 var(--space-6);
}

/* =================================================================
   应用整体布局
   ================================================================= */
.app-layout {
  display: flex;
  min-height: 100vh;
}

/* =================================================================
   顶部栏 Topbar
   ================================================================= */
.topbar {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: 60px;
  background: rgba(255, 255, 255, 0.95);
  backdrop-filter: saturate(180%) blur(20px);
  -webkit-backdrop-filter: saturate(180%) blur(20px);
  border-bottom: 1px solid var(--border);
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 var(--space-6);
  z-index: 1000;
  transition: background var(--t-base);
}

.topbar-brand {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 18px;
  font-weight: 700;
  color: var(--gray-900);
  text-decoration: none;
  letter-spacing: -0.02em;
}

.topbar-brand:hover { color: var(--primary); }

.brand-icon {
  width: 26px;
  height: 26px;
  color: var(--primary);
}

.topbar-right {
  display: flex;
  align-items: center;
  gap: var(--space-3);
}

.topbar-user {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 13px;
  color: var(--text-muted);
  padding: 6px 12px;
  border-radius: var(--radius-full);
  background: var(--gray-50);
  transition: background var(--t-fast);
}

.topbar-user:hover { background: var(--gray-100); }

.topbar-user-avatar {
  width: 24px;
  height: 24px;
  border-radius: var(--radius-full);
  background: linear-gradient(135deg, var(--primary), var(--primary-light));
  color: #fff;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-size: 12px;
  font-weight: 600;
}

.topbar-link {
  color: var(--gray-600);
  text-decoration: none;
  font-size: 14px;
  padding: 7px 14px;
  border-radius: var(--radius);
  transition: all var(--t-fast);
  font-weight: 500;
}

.topbar-link:hover {
  background: var(--gray-100);
  color: var(--primary);
}

/* =================================================================
   侧边栏 Sidebar
   ================================================================= */
.sidebar {
  position: fixed;
  top: 60px;
  left: 0;
  bottom: 0;
  width: 240px;
  background: var(--card-bg);
  border-right: 1px solid var(--border);
  display: flex;
  flex-direction: column;
  z-index: 900;
  transition: transform var(--t-slow);
}

.sidebar-nav {
  flex: 1;
  overflow-y: auto;
  padding: var(--space-4) 0;
}

.nav-section { margin-bottom: var(--space-2); }

.nav-section-title {
  padding: var(--space-3) var(--space-5) var(--space-2);
  font-size: 11px;
  font-weight: 700;
  color: var(--text-light);
  text-transform: uppercase;
  letter-spacing: 0.08em;
}

.nav-item {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 9px var(--space-5);
  margin: 2px 12px;
  color: var(--gray-600);
  text-decoration: none;
  font-size: 14px;
  font-weight: 500;
  border-radius: var(--radius);
  transition: all var(--t-fast);
  position: relative;
  border-left: 3px solid transparent;
}

.nav-item svg {
  width: 18px;
  height: 18px;
  flex-shrink: 0;
  color: var(--gray-400);
  transition: color var(--t-fast);
}

.nav-item:hover {
  background: var(--primary-50);
  color: var(--primary);
}

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

.nav-item.active {
  background: var(--primary-50);
  color: var(--primary);
  font-weight: 600;
  border-left-color: var(--primary);
  margin-left: 0;
  padding-left: calc(var(--space-5) - 3px);
}

.nav-item.active svg { color: var(--primary); }

.nav-empty {
  padding: 10px var(--space-5);
  font-size: 13px;
  color: var(--text-light);
  font-style: italic;
}

.sidebar-footer {
  padding: var(--space-4) var(--space-5);
  border-top: 1px solid var(--border-light);
  font-size: 12px;
  color: var(--text-light);
  line-height: 1.8;
  background: var(--gray-50);
}

.sidebar-footer p { margin: 0; }

/* =================================================================
   主内容区
   ================================================================= */
.main-content {
  flex: 1;
  margin-top: 60px;
  padding: var(--space-8) var(--space-8);
  background: var(--bg);
  min-height: calc(100vh - 60px);
}

.main-content.with-sidebar { margin-left: 240px; }

/* =================================================================
   卡片 - 现代风格
   ================================================================= */
.card {
  background: var(--card-bg);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-sm);
  border: 1px solid var(--border-light);
  transition: all var(--t-base);
  text-decoration: none;
  color: inherit;
  display: block;
  overflow: hidden;
}

.card:hover {
  box-shadow: var(--shadow-lg);
  transform: translateY(-2px);
  border-color: var(--primary-100);
}

.card-body { padding: var(--space-5); }
.card-title {
  font-size: 16px;
  margin-bottom: 8px;
  color: var(--gray-900);
  font-weight: 600;
}
.card-text {
  font-size: 13px;
  color: var(--text-muted);
  margin-bottom: 12px;
  line-height: 1.6;
}
.card-meta {
  display: flex;
  gap: var(--space-4);
  font-size: 12px;
  color: var(--text-muted);
  padding-top: var(--space-3);
  border-top: 1px solid var(--border-light);
}

.card-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
  gap: var(--space-5);
}

/* =================================================================
   表单卡片
   ================================================================= */
.form-card {
  background: var(--card-bg);
  border-radius: var(--radius-lg);
  padding: var(--space-6);
  box-shadow: var(--shadow-sm);
  border: 1px solid var(--border-light);
  margin-bottom: var(--space-5);
}

.form-card h3 {
  margin-bottom: var(--space-4);
  color: var(--gray-900);
  font-size: 16px;
}

/* =================================================================
   按钮
   ================================================================= */
.btn-group { display: inline-flex; gap: 0; position: relative; }

.btn {

  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  padding: 9px 18px;
  border: 1px solid transparent;
  border-radius: var(--radius);
  font-size: 14px;
  font-weight: 500;
  font-family: inherit;
  cursor: pointer;
  text-decoration: none;
  transition: all var(--t-fast);
  line-height: 1.4;
  white-space: nowrap;
  user-select: none;
}

.btn:focus-visible {
  outline: 2px solid var(--primary);
  outline-offset: 2px;
}

.btn-primary {
  background: linear-gradient(135deg, var(--primary), var(--primary-light));
  color: #fff;
  box-shadow: 0 1px 2px rgba(79, 70, 229, 0.2);
}

.btn-primary:hover {
  background: linear-gradient(135deg, var(--primary-dark), var(--primary));
  color: #fff;
  box-shadow: 0 4px 12px rgba(79, 70, 229, 0.3);
  transform: translateY(-1px);
}

.btn-primary:active { transform: translateY(0); }

.btn-secondary {
  background: var(--card-bg);
  color: var(--gray-700);
  border-color: var(--border);
}

.btn-secondary:hover {
  background: var(--gray-50);
  border-color: var(--gray-300);
  color: var(--gray-900);
}

.btn-danger {
  background: var(--danger);
  color: #fff;
}

.btn-danger:hover {
  background: #dc2626;
  color: #fff;
  box-shadow: 0 4px 12px rgba(239, 68, 68, 0.3);
  transform: translateY(-1px);
}

.btn-success {
  background: var(--success);
  color: #fff;
}

.btn-success:hover {
  background: #059669;
  color: #fff;
  transform: translateY(-1px);
}

.btn-warning {
  background: var(--warning);
  color: #fff;
}

.btn-warning:hover {
  background: #d97706;
  color: #fff;
}

.btn-ghost {
  background: transparent;
  color: var(--gray-600);
  border: 1px solid transparent;
}

.btn-ghost:hover {
  background: var(--gray-100);
  color: var(--gray-900);
}

.btn-sm {
  padding: 5px 10px;
  font-size: 12px;
  border-radius: var(--radius-sm);
}

.btn-xs {
  padding: 2px 7px;
  font-size: 11px;
  border-radius: var(--radius-sm);
  line-height: 1.4;
}

.btn-block { width: 100%; }
.btn:disabled { opacity: 0.6; cursor: not-allowed; transform: none !important; }

/* 表单输入统一样式 */
.form-input,
select.form-input {
  padding: 9px 12px;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  font-size: 14px;
  font-family: inherit;
  color: var(--text);
  background: var(--card-bg);
  transition: all var(--t-fast);
  box-sizing: border-box;
}

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

.form-input:focus,
select.form-input:focus {
  border-color: var(--primary);
  outline: none;
  box-shadow: 0 0 0 3px var(--primary-100);
}

.form-input-sm,
select.form-input-sm {
  padding: 5px 10px;
  font-size: 12px;
  border-radius: var(--radius-sm);
  min-height: 28px;
}

/* select 下拉箭头自定义 */
select.form-input {
  -webkit-appearance: none;
  -moz-appearance: none;
  appearance: none;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' fill='none' stroke='%239ca3af' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpath d='M3 5l3 3 3-3'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 8px center;
  padding-right: 28px;
  cursor: pointer;
}

select.form-input-sm {
  background-position: right 6px center;
  padding-right: 24px;
}

/* =================================================================
   统计卡片（用于首页数据总览）
   ================================================================= */
.stat-card {
  background: var(--card-bg);
  border-radius: var(--radius-lg);
  padding: var(--space-5);
  border: 1px solid var(--border-light);
  box-shadow: var(--shadow-sm);
  text-align: center;
  transition: all var(--t-base);
  position: relative;
  overflow: hidden;
}

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

.stat-card:hover {
  box-shadow: var(--shadow-md);
  transform: translateY(-2px);
  border-color: var(--primary-100);
}

.stat-card-label {
  font-size: 13px;
  color: var(--text-muted);
  margin-bottom: var(--space-2);
  font-weight: 500;
}

.stat-card-value {
  font-size: 32px;
  font-weight: 700;
  color: var(--gray-900);
  letter-spacing: -0.02em;
  line-height: 1.2;
}

/* =================================================================
   表单样式
   ================================================================= */
.form-group { margin-bottom: var(--space-4); }

.form-group label {
  display: block;
  margin-bottom: 6px;
  font-weight: 500;
  font-size: 13px;
  color: var(--gray-700);
}

.form-group input[type="text"],
.form-group input[type="password"],
.form-group input[type="email"],
.form-group input[type="number"],
.form-group input[type="url"],
.form-group select,
.form-group textarea {
  width: 100%;
  padding: 9px 12px;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  font-size: 14px;
  font-family: inherit;
  color: var(--text);
  background: var(--card-bg);
  transition: all var(--t-fast);
  box-sizing: border-box;
}

.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 {
  border-color: var(--primary);
  outline: none;
  box-shadow: 0 0 0 3px var(--primary-100);
  background: var(--card-bg);
}

.form-group textarea { resize: vertical; min-height: 80px; }

.form-note {
  font-size: 12px;
  color: var(--text-muted);
  margin-top: 4px;
}

.form-row {
  display: flex;
  gap: var(--space-4);
}
.form-row .form-group { flex: 1; }

.checkbox-group label {
  font-weight: normal;
  display: flex;
  align-items: center;
  gap: 6px;
  cursor: pointer;
  font-size: 13px;
}
.checkbox-group input[type="checkbox"] {
  width: 16px;
  height: 16px;
  accent-color: var(--primary);
  cursor: pointer;
}

/* =================================================================
   表格 - 现代化
   ================================================================= */
.table-responsive {
  overflow-x: auto;
  border-radius: var(--radius-lg);
  border: 1px solid var(--border-light);
  background: var(--card-bg);
}

.table {
  width: 100%;
  border-collapse: collapse;
  background: var(--card-bg);
  font-size: 14px;
}

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

/* 数据表内容使用完整网格 */
.data-card .table th,
.data-card .table td {
  border: 1px solid var(--border-light);
}

.table th {
  background: var(--gray-50);
  font-weight: 500;
  color: var(--gray-700);
  font-size: 13px;
  text-transform: none;
  letter-spacing: 0;
  white-space: nowrap;
}

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

.table tbody tr:hover {
  background: var(--gray-100);
}

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

.table .action-group {
  display: flex;
  gap: 4px;
  flex-wrap: nowrap;
  align-items: center;
  white-space: nowrap;
}

/* =================================================================
   页面头与节头
   ================================================================= */
.dashboard-header,
.page-header,
.section-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: var(--space-6);
  flex-wrap: wrap;
  gap: var(--space-3);
}

.dashboard-header h1,
.page-header h1,
.section-header h2 {
  margin: 0;
  font-size: 22px;
  font-weight: 700;
  color: var(--gray-900);
  letter-spacing: -0.01em;
}

/* =================================================================
   空状态
   ================================================================= */
.empty-state {
  text-align: center;
  padding: var(--space-12) var(--space-5);
  color: var(--text-muted);
  background: var(--card-bg);
  border-radius: var(--radius-lg);
  border: 2px dashed var(--border);
}

.empty-state-icon {
  font-size: 56px;
  margin-bottom: var(--space-4);
  opacity: 0.6;
}

.empty-state h3 {
  color: var(--gray-700);
  margin-bottom: var(--space-2);
  font-size: 16px;
}

.empty-state p {
  font-size: 14px;
  margin: 0;
}

/* =================================================================
   分页
   ================================================================= */
.pagination {
  display: flex;
  gap: 6px;
  justify-content: center;
  margin-top: var(--space-6);
  flex-wrap: wrap;
}

.page-link {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 36px;
  height: 36px;
  padding: 0 10px;
  border-radius: var(--radius);
  background: var(--card-bg);
  border: 1px solid var(--border);
  color: var(--gray-700);
  text-decoration: none;
  font-size: 13px;
  font-weight: 500;
  transition: all var(--t-fast);
}

.page-link:hover {
  border-color: var(--primary);
  color: var(--primary);
  background: var(--primary-50);
}

.page-link.active {
  background: var(--primary);
  color: #fff;
  border-color: var(--primary);
  box-shadow: 0 2px 8px rgba(79, 70, 229, 0.3);
}

/* =================================================================
   提示框
   ================================================================= */
.alert {
  padding: 12px 16px;
  border-radius: var(--radius-md);
  margin-bottom: var(--space-5);
  font-size: 14px;
  border: 1px solid transparent;
  display: flex;
  align-items: flex-start;
  gap: 8px;
  animation: slideDown 0.3s ease;
}

@keyframes slideDown {
  from { opacity: 0; transform: translateY(-8px); }
  to { opacity: 1; transform: translateY(0); }
}

.alert-danger {
  background: var(--danger-light);
  color: #991b1b;
  border-color: #fecaca;
}
.alert-success {
  background: var(--success-light);
  color: #065f46;
  border-color: #a7f3d0;
}
.alert-warning {
  background: var(--warning-light);
  color: #92400e;
  border-color: #fde68a;
}
.alert-info {
  background: var(--info-light);
  color: #155e75;
  border-color: #a5f3fc;
}

.alert ul { margin: 0; padding-left: 20px; }

/* =================================================================
   数据卡片
   ================================================================= */
.data-card {
  background: var(--card-bg);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-sm);
  border: 1px solid var(--border-light);
  overflow: hidden;
  margin-bottom: var(--space-5);
  transition: box-shadow var(--t-base);
}

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

.data-card-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: var(--space-4) var(--space-5);
  border-bottom: 1px solid var(--border-light);
  background: linear-gradient(to bottom, var(--card-bg), var(--gray-50));
}

.data-card-header h2 {
  margin: 0;
  font-size: 16px;
  font-weight: 600;
  color: var(--gray-900);
  display: flex;
  align-items: center;
  gap: 8px;
}

.data-card-header h2::before {
  content: '';
  width: 4px;
  height: 16px;
  background: linear-gradient(135deg, var(--primary), var(--primary-light));
  border-radius: 2px;
}

.data-card-actions {
  display: flex;
  gap: 6px;
  align-items: center;
}

.data-card-actions .btn-icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 32px;
  height: 32px;
  padding: 0;
  border-radius: var(--radius);
  border: 1px solid var(--border);
  background: var(--card-bg);
  color: var(--gray-600);
  cursor: pointer;
  text-decoration: none;
  transition: all var(--t-fast);
  font-size: 16px;
}

.data-card-actions .btn-icon:hover {
  background: var(--primary-50);
  border-color: var(--primary);
  color: var(--primary);
  transform: translateY(-1px);
}

.data-card-actions .btn-icon-danger:hover {
  background: var(--danger-light);
  border-color: var(--danger);
  color: var(--danger);
}

.data-card-body { padding: 0; }

.data-card-body .empty-state {
  border: none;
  border-radius: 0;
  background: transparent;
  padding: var(--space-12) var(--space-5);
}

/* =================================================================
   模态框
   ================================================================= */
.modal-overlay {
  display: none;
  position: fixed;
  top: 0; left: 0; right: 0; bottom: 0;
  background: rgba(17, 24, 39, 0.5);
  backdrop-filter: blur(4px);
  -webkit-backdrop-filter: blur(4px);
  z-index: 2000;
  align-items: center;
  justify-content: center;
  padding: var(--space-4);
  animation: fadeIn 0.2s ease;
}

.modal-overlay.active {
  display: flex;
}

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

.modal-box {
  background: var(--card-bg);
  border-radius: var(--radius-xl);
  padding: var(--space-6);
  max-width: 520px;
  width: 100%;
  max-height: 85vh;
  overflow-y: auto;
  box-shadow: var(--shadow-2xl);
  animation: modalSlide 0.3s cubic-bezier(0.34, 1.56, 0.64, 1);
}

@keyframes modalSlide {
  from { opacity: 0; transform: translateY(-20px) scale(0.96); }
  to { opacity: 1; transform: translateY(0) scale(1); }
}

.modal-box h3 {
  margin: 0 0 var(--space-5) 0;
  font-size: 18px;
  font-weight: 700;
  color: var(--gray-900);
  display: flex;
  align-items: center;
  gap: 8px;
}

.modal-box h3::before {
  content: '';
  width: 4px;
  height: 20px;
  background: linear-gradient(135deg, var(--primary), var(--primary-light));
  border-radius: 2px;
}

.modal-actions {
  display: flex;
  gap: 10px;
  margin-top: var(--space-5);
  justify-content: flex-end;
  padding-top: var(--space-4);
  border-top: 1px solid var(--border-light);
}

.modal-actions .btn { min-width: 88px; }

/* =================================================================
   登录注册页 - 黑白简约
   ================================================================= */
.auth-wrapper {
  min-height: 100%;
  height: 100%;
  display: flex;
  justify-content: center;
  align-items: center;
  padding: var(--space-6);
  position: relative;
  box-sizing: border-box;
}

body:has(.auth-wrapper) {
  background: var(--gray-100);
  margin: 0;
}

.auth-card {
  background: #ffffff;
  border: 1px solid var(--gray-200);
  border-radius: var(--radius-lg);
  padding: var(--space-10) var(--space-8);
  box-shadow: 0 1px 2px rgba(0,0,0,0.04), 0 0 0 1px rgba(0,0,0,0.02);
  width: 100%;
  max-width: 420px;
  position: relative;
  z-index: 1;
  animation: authFadeIn 0.4s ease;
}

@keyframes authFadeIn {
  from { opacity: 0; transform: translateY(8px); }
  to { opacity: 1; transform: translateY(0); }
}

.auth-brand {
  text-align: center;
  margin-bottom: var(--space-6);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--space-2);
}

.auth-brand .auth-logo {
  width: 44px;
  height: 44px;
  border-radius: var(--radius);
  background: #000;
  color: #fff;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-size: 22px;
  font-weight: 700;
  letter-spacing: -0.02em;
}

.auth-brand .auth-brand-name {
  font-size: 14px;
  font-weight: 600;
  color: var(--gray-900);
  letter-spacing: 0.04em;
}

.auth-card h2 {
  text-align: center;
  margin-bottom: var(--space-1);
  color: var(--gray-900);
  font-size: 22px;
  font-weight: 600;
  letter-spacing: -0.01em;
}

.auth-card .auth-subtitle {
  text-align: center;
  color: var(--gray-500);
  margin-bottom: var(--space-8);
  font-size: 13px;
}

.auth-card .form-group {
  margin-bottom: var(--space-4);
}

.auth-card .form-group label {
  display: block;
  margin-bottom: 6px;
  font-size: 13px;
  font-weight: 500;
  color: var(--gray-700);
}

.auth-card input[type="email"],
.auth-card input[type="password"],
.auth-card input[type="text"] {
  width: 100%;
  padding: 10px 12px;
  font-size: 14px;
  font-family: inherit;
  color: var(--gray-900);
  background: #fff;
  border: 1px solid var(--gray-200);
  border-radius: var(--radius);
  transition: border-color var(--t-fast), box-shadow var(--t-fast);
  box-sizing: border-box;
}

.auth-card input[type="email"]:focus,
.auth-card input[type="password"]:focus,
.auth-card input[type="text"]:focus {
  outline: none;
  border-color: #000;
  box-shadow: 0 0 0 3px rgba(0,0,0,0.06);
}

.auth-card input::placeholder {
  color: var(--gray-400);
}

.auth-card .form-note {
  font-size: 12px;
  color: var(--gray-500);
  margin-top: 4px;
}

.auth-card .checkbox-group {
  margin: var(--space-2) 0 var(--space-5);
}

.auth-card .checkbox-group label {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 13px;
  color: var(--gray-600);
  cursor: pointer;
  font-weight: 400;
  margin-bottom: 0;
}

.auth-card .checkbox-group input[type="checkbox"] {
  accent-color: #000;
  width: 14px;
  height: 14px;
  cursor: pointer;
}

.auth-card .btn-block {
  width: 100%;
  padding: 11px 18px;
  font-size: 14px;
  font-weight: 500;
  border-radius: var(--radius);
  background: #000;
  color: #fff;
  border: 1px solid #000;
  cursor: pointer;
  transition: background var(--t-fast);
}

.auth-card .btn-block:hover {
  background: var(--gray-800);
}

.auth-card .btn-block:active {
  background: #000;
}

.auth-divider {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  margin: var(--space-6) 0;
  color: var(--gray-400);
  font-size: 12px;
}

.auth-divider::before,
.auth-divider::after {
  content: '';
  flex: 1;
  height: 1px;
  background: var(--gray-200);
}

.auth-links {
  text-align: center;
  margin-top: var(--space-5);
  font-size: 13px;
  color: var(--gray-500);
}

.auth-links a {
  color: #000;
  text-decoration: none;
  font-weight: 500;
}
.auth-links a:hover { text-decoration: underline; }

/* =================================================================
   统计卡片（数据总览页面专用，与上方 .stat-card 区分）
   ================================================================= */
.stats-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
  gap: var(--space-4);
  margin-bottom: var(--space-6);
}

/* =================================================================
   信息条
   ================================================================= */
.info-bar {
  display: flex;
  gap: var(--space-5);
  padding: var(--space-3) var(--space-4);
  background: var(--card-bg);
  border-radius: var(--radius-md);
  margin-bottom: var(--space-5);
  font-size: 13px;
  flex-wrap: wrap;
  box-shadow: var(--shadow-xs);
  border: 1px solid var(--border-light);
}

/* =================================================================
   Token 显示
   ================================================================= */
.token-code {
  font-family: "SF Mono", "Fira Code", "Monaco", monospace;
  font-size: 12px;
  background: var(--gray-50);
  padding: 4px 10px;
  border-radius: var(--radius-sm);
  border: 1px solid var(--border);
  color: var(--danger);
  user-select: all;
}

.token-display {
  display: flex;
  align-items: center;
  gap: 10px;
}

/* 复制字段 */
.copy-field {
  display: flex;
  gap: 8px;
  align-items: center;
}

.copy-field .form-input {
  flex: 1;
  font-family: "SF Mono", "Fira Code", "Monaco", monospace;
  font-size: 13px;
  background: var(--gray-50);
  cursor: pointer;
}

.form-help code {
  background: var(--gray-100);
  padding: 1px 5px;
  border-radius: 3px;
  font-family: "SF Mono", "Fira Code", monospace;
  font-size: 12px;
}

/* =================================================================
   徽章
   ================================================================= */
.badge {
  display: inline-block;
  padding: 2px 8px;
  border-radius: var(--radius-full);
  font-size: 11px;
  font-weight: 600;
  text-transform: uppercase;
  background: var(--gray-100);
  color: var(--gray-700);
  letter-spacing: 0.04em;
}

.badge-primary {
  background: var(--primary-100);
  color: var(--primary-dark);
}

.badge-success {
  background: var(--success-light);
  color: #047857;
}

.badge-warning {
  background: var(--warning-light);
  color: #92400e;
}

.badge-danger {
  background: var(--danger-light);
  color: #b91c1c;
}

/* =================================================================
   工具类
   ================================================================= */
.text-muted { color: var(--text-muted); }
.text-light { color: var(--text-light); }
.text-danger { color: var(--danger); }
.text-success { color: var(--success); }
.text-primary { color: var(--primary); }

hr {
  border: none;
  border-top: 1px solid var(--border);
  margin: var(--space-5) 0;
}

.text-center { text-align: center; }
.text-right { text-align: right; }

/* =================================================================
   弹出菜单 Dropdown
   ================================================================= */
.dropdown { position: relative; display: inline-block; }

.dropdown-trigger {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  padding: 6px 14px;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: var(--card-bg);
  color: var(--gray-700);
  font-size: 13px;
  font-weight: 500;
  cursor: pointer;
  transition: all var(--t-fast);
  font-family: inherit;
}

.dropdown-trigger:hover {
  background: var(--gray-50);
  border-color: var(--gray-300);
}

.dropdown-trigger::after {
  content: '';
  display: inline-block;
  width: 0;
  height: 0;
  border-left: 4px solid transparent;
  border-right: 4px solid transparent;
  border-top: 5px solid var(--gray-400);
  margin-left: 2px;
}

.dropdown-menu {
  display: none;
  position: absolute;
  top: calc(100% + 4px);
  right: 0;
  min-width: 220px;
  background: var(--card-bg);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-lg);
  z-index: 1001;
  padding: var(--space-1) 0;
  animation: dropdownIn 0.15s ease;
}

.dropdown-menu.active { display: block; }

@keyframes dropdownIn {
  from { opacity: 0; transform: translateY(-4px); }
  to { opacity: 1; transform: translateY(0); }
}

.dropdown-item {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 9px 16px;
  font-size: 13px;
  color: var(--gray-700);
  cursor: pointer;
  transition: background var(--t-fast);
  border: none;
  background: none;
  width: 100%;
  text-align: left;
  font-family: inherit;
  text-decoration: none;
}

.dropdown-item:hover {
  background: var(--primary-50);
  color: var(--primary);
}

.dropdown-item-danger { color: #dc2626; }
.dropdown-item-danger:hover { background: #fef2f2; color: #dc2626; }

.dropdown-divider {
  height: 1px;
  background: var(--border-light);
  margin: var(--space-1) 0;
}

/* 模态框小型化 */
.modal-sm { max-width: 420px; }
.modal-sm .modal-box { padding: var(--space-5); }
.modal-sm h3 { font-size: 16px; margin-bottom: var(--space-4); }

/* 封禁原因信息提示 */
.ban-reason { font-size: 12px; color: var(--text-muted); cursor: help; border-bottom: 1px dashed var(--gray-300); }

/* 表单内联：两列布局 */
.form-inline-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-4);
}

@media (max-width: 768px) {
  .form-inline-row { grid-template-columns: 1fr; }
}

/* 权限复选框组 */
.permission-checks {
  display: flex;
  flex-direction: column;
  gap: var(--space-1);
}

.permission-checks label {
  display: flex;
  align-items: center;
  gap: 8px;
  font-weight: normal;
  font-size: 13px;
  cursor: pointer;
  padding: 4px 0;
}

.permission-checks input[type="checkbox"] {
  width: 16px;
  height: 16px;
  accent-color: var(--primary);
}

/* =================================================================
   响应式设计
   ================================================================= */
@media (max-width: 1024px) {
  .card-grid { grid-template-columns: repeat(auto-fill, minmax(280px, 1fr)); }
}

@media (max-width: 768px) {
  .main-content { padding: var(--space-5) var(--space-4); }

  .sidebar {
    transform: translateX(-100%);
    box-shadow: var(--shadow-xl);
  }

  .sidebar.open { transform: translateX(0); }

  .main-content.with-sidebar { margin-left: 0; }

  .card-grid { grid-template-columns: 1fr; }
  .form-row { flex-direction: column; gap: 0; }
  .stats-grid { grid-template-columns: repeat(2, 1fr); }
  .info-bar { flex-direction: column; gap: 8px; }

  .table th, .table td { padding: 10px 12px; }

  .modal-box { padding: var(--space-5); }
  .auth-card { padding: var(--space-6) var(--space-5); }

  .topbar { padding: 0 var(--space-4); }
  .topbar-brand span { display: none; }
}

@media (max-width: 480px) {
  .stats-grid { grid-template-columns: 1fr; }
  h1 { font-size: 22px; }
  h2 { font-size: 18px; }
}

/* 菜单切换按钮（移动端） */
.mobile-menu-btn {
  display: none;
  background: none;
  border: none;
  padding: 8px;
  cursor: pointer;
  color: var(--gray-700);
}

@media (max-width: 768px) {
  .mobile-menu-btn { display: inline-flex; }
}