/* ============================================
   App 扫码下载管理系统  —  后台设计系统 v2
   高级感 · 统一 · 精致
   ============================================ */

/* --- 设计变量 --- */
:root {
  /* 主色调 */
  --primary: #6366f1;
  --primary-dark: #4f46e5;
  --primary-light: #eef2ff;
  --primary-gradient: linear-gradient(135deg, #6366f1, #8b5cf6);

  /* 语义色 */
  --success: #10b981;
  --success-light: #ecfdf5;
  --warning: #f59e0b;
  --warning-light: #fffbeb;
  --danger: #ef4444;
  --danger-light: #fef2f2;
  --info: #3b82f6;
  --info-light: #eff6ff;

  /* 中性色 */
  --body-bg: #f1f5f9;
  --card-bg: #ffffff;
  --sidebar-bg: #0f172a;
  --sidebar-hover: #1e293b;
  --sidebar-active: rgba(99, 102, 241, 0.15);
  --border: #e2e8f0;
  --border-light: #f1f5f9;

  /* 文字 */
  --text: #0f172a;
  --text-secondary: #475569;
  --text-muted: #94a3b8;

  /* 圆角 */
  --radius: 12px;
  --radius-sm: 8px;
  --radius-xs: 6px;

  /* 阴影 */
  --shadow-sm: 0 1px 2px rgba(0,0,0,0.04);
  --shadow: 0 1px 3px rgba(0,0,0,0.06), 0 1px 2px rgba(0,0,0,0.04);
  --shadow-md: 0 4px 6px -1px rgba(0,0,0,0.06), 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(0,0,0,0.10), 0 10px 10px -5px rgba(0,0,0,0.04);

  /* 布局 */
  --sidebar-width: 260px;
  --header-h: 64px;
  --transition: 0.2s cubic-bezier(0.4, 0, 0.2, 1);

  /* 字体 */
  --font: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "PingFang SC", "Microsoft YaHei", "Helvetica Neue", sans-serif;
}

/* --- 基础重置 --- */
*, *::before, *::after { box-sizing: border-box; }
body {
  margin: 0;
  font-family: var(--font);
  font-size: 14px;
  color: var(--text);
  background: var(--body-bg);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}
a { color: var(--primary); text-decoration: none; transition: color var(--transition); }
a:hover { color: var(--primary-dark); }
::selection { background: rgba(99,102,241,0.15); color: var(--primary-dark); }

/* ============================================
   侧边栏
   ============================================ */
.sidebar {
  position: fixed; top: 0; left: 0;
  width: var(--sidebar-width); height: 100vh;
  background: var(--sidebar-bg);
  color: #fff;
  z-index: 1000;
  display: flex; flex-direction: column;
  transition: transform var(--transition);
}
.sidebar.collapsed { width: 60px; }
.sidebar.collapsed .sidebar-header span { display: none; }
.sidebar.collapsed .sidebar-menu span { display: none; }
.sidebar.collapsed .sidebar-menu a { justify-content: center; padding: 10px 0; }
.sidebar.collapsed .sidebar-footer span { display: none; }
.sidebar.collapsed .sidebar-toggle-btn { margin: 0 auto; }
.sidebar.collapsed .sidebar-toggle-btn i { transform: rotate(180deg); }

.sidebar-header {
  display: flex; align-items: center; justify-content: space-between;
  padding: 20px 20px 16px;
  flex-shrink: 0;
}
.sidebar-header .brand {
  display: flex; align-items: center; gap: 10px;
  font-size: 16px; font-weight: 700; color: #fff;
}
.sidebar-header .brand-icon {
  width: 34px; height: 34px;
  background: var(--primary-gradient);
  border-radius: 10px;
  display: flex; align-items: center; justify-content: center;
  font-size: 16px; color: #fff;
  box-shadow: 0 4px 12px rgba(99,102,241,0.3);
}

.sidebar-toggle-btn {
  background: rgba(99,102,241,0.15);
  border: 1.5px solid rgba(99,102,241,0.3);
  color: rgba(255,255,255,0.85);
  width: 36px; height: 36px;
  border-radius: 10px;
  cursor: pointer;
  display: flex; align-items: center; justify-content: center;
  font-size: 14px;
  transition: all var(--transition);
  flex-shrink: 0;
}
.sidebar-toggle-btn:hover { 
  background: rgba(99,102,241,0.3); 
  border-color: rgba(99,102,241,0.6);
  color: #fff; 
  box-shadow: 0 0 12px rgba(99,102,241,0.2);
}
.sidebar-toggle-btn:active { transform: scale(0.92); }

/* 侧边栏菜单 */
.sidebar-menu {
  list-style: none; padding: 8px 12px; margin: 0;
  flex: 1; overflow-y: auto;
}
.sidebar-menu li { margin: 1px 0; }
.sidebar-menu a {
  display: flex; align-items: center; gap: 12px;
  padding: 10px 14px;
  color: rgba(255,255,255,0.6);
  border-radius: 10px;
  font-size: 14px; font-weight: 500;
  transition: all var(--transition);
  text-decoration: none;
}
.sidebar-menu a:hover {
  background: var(--sidebar-hover);
  color: #fff;
}
.sidebar-menu a.active {
  background: var(--sidebar-active);
  color: #fff;
  font-weight: 600;
}
.sidebar-menu a i {
  width: 20px; text-align: center;
  font-size: 16px; flex-shrink: 0;
  color: rgba(255,255,255,0.4);
  transition: color var(--transition);
}
.sidebar-menu a.active i { color: var(--primary); }
.sidebar-menu .menu-label { flex: 1; overflow: hidden; text-overflow: ellipsis; }

.sidebar-footer {
  padding: 12px;
  border-top: 1px solid rgba(255,255,255,0.06);
  flex-shrink: 0;
}
.sidebar-footer a {
  display: flex; align-items: center; gap: 12px;
  padding: 10px 14px;
  color: rgba(255,255,255,0.4);
  border-radius: 10px;
  font-size: 13px;
  transition: all var(--transition);
}
.sidebar-footer a:hover { color: var(--danger); background: rgba(239,68,68,0.1); }

/* 移动端遮罩 */
.sidebar-overlay {
  display: none; position: fixed;
  top: 0; left: 0; right: 0; bottom: 0;
  background: rgba(0,0,0,0.5);
  z-index: 999;
  backdrop-filter: blur(4px);
}
.sidebar-overlay.active { display: block; }

.sidebar-toggle-mobile {
  display: none;
  position: fixed; top: 14px; left: 14px;
  z-index: 1100;
  width: 40px; height: 40px;
  border-radius: 12px;
  background: #fff;
  color: var(--text);
  border: 1px solid var(--border);
  font-size: 18px;
  cursor: pointer;
  align-items: center; justify-content: center;
  box-shadow: var(--shadow-md);
}

/* ============================================
   主内容区
   ============================================ */
.main-content {
  margin-left: var(--sidebar-width);
  min-height: 100vh;
  transition: margin-left var(--transition);
  display: flex; flex-direction: column;
}
.main-content.expanded { margin-left: 60px; }

/* 顶部导航栏 */
.top-navbar {
  display: flex; align-items: center; justify-content: space-between;
  padding: 0 32px;
  height: var(--header-h);
  background: rgba(255,255,255,0.8);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--border);
  position: sticky; top: 0; z-index: 100;
}
.top-navbar .page-title {
  font-size: 16px; font-weight: 600;
  color: var(--text);
  display: flex; align-items: center; gap: 8px;
}
.top-navbar .user-info {
  display: flex; align-items: center; gap: 8px;
  font-size: 13px; color: var(--text-secondary);
  background: var(--body-bg);
  padding: 6px 14px 6px 10px;
  border-radius: 20px;
}
.top-navbar .user-info i { font-size: 18px; color: var(--primary); }

.content-wrapper {
  padding: 28px 32px;
  flex: 1;
}

/* ============================================
   卡片
   ============================================ */
.card {
  background: var(--card-bg);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: 24px;
  margin-bottom: 20px;
  transition: box-shadow var(--transition);
  border: 1px solid rgba(0,0,0,0.03);
}
.card:hover { box-shadow: var(--shadow-md); }
.card-header {
  display: flex; justify-content: space-between; align-items: center;
  margin-bottom: 20px;
  padding-bottom: 16px;
  border-bottom: 1px solid var(--border-light);
}
.card-header h2, .card-header h3 {
  margin: 0;
  font-size: 16px; font-weight: 600;
  color: var(--text);
  display: flex; align-items: center; gap: 8px;
}
.card-footer {
  margin-top: 20px;
  padding-top: 16px;
  border-top: 1px solid var(--border-light);
}

/* 统计卡片 */
.stat-cards {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 20px;
  margin-bottom: 28px;
}
.stat-card {
  background: var(--card-bg);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: 24px;
  display: flex; align-items: center; gap: 18px;
  transition: all var(--transition);
  border: 1px solid rgba(0,0,0,0.03);
}
.stat-card:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-lg);
}
.stat-card .stat-icon {
  width: 56px; height: 56px;
  border-radius: 14px;
  display: flex; align-items: center; justify-content: center;
  font-size: 24px;
  flex-shrink: 0;
}
.stat-card .stat-icon.blue { background: var(--primary-light); color: var(--primary); }
.stat-card .stat-icon.green { background: var(--success-light); color: var(--success); }
.stat-card .stat-icon.orange { background: var(--warning-light); color: var(--warning); }
.stat-card .stat-icon.red { background: var(--danger-light); color: var(--danger); }
.stat-card .stat-info { flex: 1; min-width: 0; }
.stat-card .stat-number {
  font-size: 28px; font-weight: 700;
  color: var(--text); line-height: 1.2;
}
.stat-card .stat-label {
  font-size: 13px;
  color: var(--text-muted);
  margin-top: 2px;
}

/* ============================================
   表格
   ============================================ */
.table-container {
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
  border: 1px solid var(--border);
  border-radius: var(--radius);
}
table {
  width: 100%;
  border-collapse: collapse;
  font-size: 14px;
}
thead th {
  background: #f8fafc;
  color: var(--text-secondary);
  font-weight: 600;
  padding: 14px 18px;
  text-align: left;
  border-bottom: 1px solid var(--border);
  white-space: nowrap;
  font-size: 13px;
  letter-spacing: 0.02em;
}
thead th:first-child { border-radius: var(--radius) 0 0 0; }
thead th:last-child { border-radius: 0 var(--radius) 0 0; }
tbody td {
  padding: 14px 18px;
  border-bottom: 1px solid var(--border-light);
  color: var(--text-secondary);
  vertical-align: middle;
}
tbody tr:hover td { background: #fafbfc; }
tbody tr:last-child td { border-bottom: none; }
tbody tr:last-child td:first-child { border-radius: 0 0 0 var(--radius); }
tbody tr:last-child td:last-child { border-radius: 0 0 var(--radius) 0; }

.table-toolbar {
  display: flex; justify-content: space-between; align-items: center;
  margin-bottom: 16px; flex-wrap: wrap; gap: 12px;
}
.table-toolbar .left { display: flex; align-items: center; gap: 10px; }
.table-toolbar .left h5 { margin: 0; font-size: 16px; font-weight: 600; color: var(--text); }
.table-toolbar .right { display: flex; gap: 8px; }

/* ============================================
   表单
   ============================================ */
.form-group { margin-bottom: 20px; }
.form-group label {
  display: block;
  font-size: 13px; font-weight: 600;
  color: var(--text-secondary);
  margin-bottom: 6px;
}
.form-control {
  width: 100%;
  padding: 11px 16px;
  border: 1.5px solid var(--border);
  border-radius: var(--radius-sm);
  font-size: 14px; color: var(--text);
  background: #fff;
  transition: all var(--transition);
  outline: none;
}
.form-control:hover { border-color: #cbd5e1; }
.form-control:focus {
  border-color: var(--primary);
  box-shadow: 0 0 0 3px rgba(99,102,241,0.1);
}
.form-control::placeholder { color: var(--text-muted); }
textarea.form-control { min-height: 100px; resize: vertical; }
select.form-control { appearance: auto; }
.form-text { font-size: 12px; color: var(--text-muted); margin-top: 4px; }
.form-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 20px;
}
.form-container { max-width: 720px; }

/* ============================================
   按钮
   ============================================ */
.btn {
  display: inline-flex; align-items: center; justify-content: center;
  gap: 8px;
  padding: 10px 22px;
  border: none;
  border-radius: var(--radius-sm);
  font-size: 14px; font-weight: 600;
  cursor: pointer;
  transition: all var(--transition);
  text-decoration: none;
  white-space: nowrap;
  line-height: 1.4;
}
.btn:active { transform: scale(0.97); }
.btn:disabled { opacity: 0.5; cursor: not-allowed; transform: none; }

.btn-primary {
  background: var(--primary-gradient);
  color: #fff;
  box-shadow: 0 2px 8px rgba(99,102,241,0.25);
}
.btn-primary:hover { color: #fff; box-shadow: 0 4px 16px rgba(99,102,241,0.35); transform: translateY(-1px); }
.btn-success { background: var(--success); color: #fff; }
.btn-success:hover { color: #fff; background: #059669; transform: translateY(-1px); }
.btn-danger { background: var(--danger); color: #fff; }
.btn-danger:hover { color: #fff; background: #dc2626; transform: translateY(-1px); }
.btn-warning { background: var(--warning); color: #fff; }
.btn-warning:hover { color: #fff; background: #d97706; transform: translateY(-1px); }
.btn-info { background: var(--info); color: #fff; }
.btn-info:hover { color: #fff; background: #2563eb; transform: translateY(-1px); }

.btn-outline {
  background: transparent; border: 1.5px solid var(--border); color: var(--text-secondary);
}
.btn-outline:hover { border-color: var(--primary); color: var(--primary); background: var(--primary-light); }
.btn-outline-primary { border: 1.5px solid var(--primary); color: var(--primary); background: transparent; }
.btn-outline-primary:hover { background: var(--primary); color: #fff; }
.btn-outline-danger { border: 1.5px solid var(--danger); color: var(--danger); background: transparent; }
.btn-outline-danger:hover { background: var(--danger); color: #fff; }
.btn-outline-success { border: 1.5px solid var(--success); color: var(--success); background: transparent; }
.btn-outline-success:hover { background: var(--success); color: #fff; }
.btn-outline-info { border: 1.5px solid var(--info); color: var(--info); background: transparent; }
.btn-outline-info:hover { background: var(--info); color: #fff; }

.btn-sm { padding: 7px 14px; font-size: 12px; border-radius: var(--radius-xs); }
.btn-lg { padding: 13px 30px; font-size: 16px; border-radius: var(--radius); }

/* ============================================
   徽章 / 状态标签
   ============================================ */
.badge {
  display: inline-flex; align-items: center;
  gap: 5px;
  padding: 3px 12px;
  border-radius: 20px;
  font-size: 12px; font-weight: 600;
  line-height: 1.5;
}
.badge-success { background: var(--success-light); color: #059669; }
.badge-danger { background: var(--danger-light); color: #dc2626; }
.badge-warning { background: var(--warning-light); color: #d97706; }
.badge-info { background: var(--primary-light); color: var(--primary-dark); }
.badge-secondary { background: #f1f5f9; color: #64748b; }

/* 状态badge（用于版本上下线） */
.badge-status { display: inline-flex; align-items: center; gap: 6px; padding: 4px 14px; border-radius: 20px; font-size: 12px; font-weight: 600; }
.badge-status.online { background: var(--success-light); color: #059669; }
.badge-status.offline { background: #f1f5f9; color: #64748b; }

/* ============================================
   提示条
   ============================================ */
.alert {
  padding: 14px 18px;
  border-radius: var(--radius-sm);
  font-size: 14px;
  margin-bottom: 20px;
  display: flex; align-items: center; gap: 10px;
  line-height: 1.5;
}
.alert-success { background: var(--success-light); color: #059669; border: 1px solid #a7f3d0; }
.alert-danger { background: var(--danger-light); color: #dc2626; border: 1px solid #fecaca; }
.alert-warning { background: var(--warning-light); color: #d97706; border: 1px solid #fde68a; }
.alert-info { background: var(--primary-light); color: var(--primary-dark); border: 1px solid #c7d2fe; }

/* ============================================
   Toast 通知
   ============================================ */
.toast-container {
  position: fixed; top: 20px; right: 20px;
  z-index: 9999;
  display: flex; flex-direction: column; gap: 8px;
  pointer-events: none;
}
.toast {
  display: flex; align-items: center; gap: 10px;
  padding: 14px 20px;
  border-radius: var(--radius-sm);
  font-size: 14px; font-weight: 500;
  color: #fff;
  box-shadow: var(--shadow-xl);
  pointer-events: auto;
  opacity: 0;
  transform: translateX(100%) scale(0.95);
  transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  max-width: 400px;
}
.toast.show { opacity: 1; transform: translateX(0) scale(1); }
.toast-success { background: var(--success); }
.toast-error { background: var(--danger); }
.toast-warning { background: var(--warning); }
.toast-info { background: var(--primary); }
.toast i { font-size: 18px; flex-shrink: 0; }

/* ============================================
   模态框（自定义弹窗，参考server_restored）
   ============================================ */
.modal-overlay {
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.5);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 10000;
  padding: 24px;
  backdrop-filter: blur(4px);
}

.modal-content {
  background: var(--card-bg);
  border-radius: 16px;
  box-shadow: 0 25px 50px rgba(0,0,0,0.2);
  width: 100%;
  max-width: 560px;
  max-height: 85vh;
  display: flex;
  flex-direction: column;
  animation: modalSlideIn 0.2s ease;
}

@keyframes modalSlideIn {
  from { opacity: 0; transform: scale(0.96) translateY(-8px); }
  to { opacity: 1; transform: scale(1) translateY(0); }
}

.modal-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 20px 24px;
  border-bottom: 1px solid var(--border);
  flex-shrink: 0;
}
.modal-header h3 {
  margin: 0;
  font-size: 16px;
  font-weight: 600;
  color: var(--text);
}
.modal-close-btn {
  background: none;
  border: none;
  font-size: 22px;
  color: var(--text-muted);
  cursor: pointer;
  width: 32px;
  height: 32px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 8px;
  transition: background 0.15s;
}
.modal-close-btn:hover { background: #f1f5f9; color: var(--text); }

.modal-body {
  padding: 24px;
  overflow-y: auto;
  flex: 1;
}

.modal-footer {
  display: flex;
  gap: 10px;
  justify-content: flex-end;
  padding: 16px 24px;
  border-top: 1px solid var(--border);
  flex-shrink: 0;
}
.modal-footer .btn { min-width: 80px; }

/* Bootstrap modal 样式覆盖 - 保持弹窗内容统一风格 */
.modal-dialog {
  max-width: 560px;
}
.modal-content { border-radius: 16px; border: none; box-shadow: 0 25px 50px rgba(0,0,0,0.2); }
.modal-header { border-bottom: 1px solid var(--border); padding: 20px 24px; }
.modal-body { padding: 24px; }
.modal-footer { border-top: 1px solid var(--border); padding: 16px 24px; }

/* 弹窗中的表单控件统一样式 */
.modal-body .form-group { margin-bottom: 16px; }
.modal-body .form-group label { display: block; font-size: 13px; font-weight: 600; color: var(--text-secondary); margin-bottom: 6px; }
.modal-body .form-control { width: 100%; padding: 10px 14px; border: 1.5px solid var(--border); border-radius: var(--radius-sm); font-size: 14px; outline: none; transition: border-color 0.2s; }
.modal-body .form-control:focus { border-color: var(--primary); box-shadow: 0 0 0 3px rgba(99,102,241,0.1); }

/* ============================================
   Toast 通知
   ============================================ */
.empty-state {
  text-align: center;
  padding: 64px 24px;
  color: var(--text-muted);
}
.empty-state i {
  font-size: 56px;
  margin-bottom: 16px;
  display: block;
  opacity: 0.2;
}
.empty-state p { font-size: 15px; margin: 0 0 8px; }
.empty-state .hint { font-size: 13px; color: var(--text-muted); margin-top: 4px; }
.empty-state .btn { margin-top: 20px; }

/* ============================================
   文件上传区域
   ============================================ */
.file-upload-area {
  border: 2px dashed var(--border);
  border-radius: var(--radius);
  padding: 36px 24px;
  text-align: center;
  cursor: pointer;
  transition: all var(--transition);
  background: #fafbfc;
}
.file-upload-area:hover { border-color: var(--primary); background: var(--primary-light); }
.file-upload-area i { font-size: 40px; color: var(--text-muted); margin-bottom: 10px; display: block; opacity: 0.5; }
.file-upload-area .upload-text { font-size: 15px; color: var(--text-secondary); font-weight: 500; }
.file-upload-area .upload-subtext { font-size: 12px; color: var(--text-muted); margin-top: 4px; }
.file-upload-area .file-info {
  display: none;
  margin-top: 14px;
  padding: 12px 16px;
  background: #fff;
  border-radius: var(--radius-sm);
  border: 1px solid var(--border);
}
.file-upload-area.has-file { border-color: var(--success); background: var(--success-light); }
.file-upload-area.has-file .file-info { display: block; }

/* ============================================
   进度条
   ============================================ */
.progress-bar-bg {
  height: 8px;
  background: #f1f5f9;
  border-radius: 4px;
  overflow: hidden;
  margin: 8px 0;
}
.progress-bar-fill {
  height: 100%;
  background: var(--primary-gradient);
  border-radius: 4px;
  transition: width 0.4s ease;
}

/* ============================================
   App图标缩略图 / 通用
   ============================================ */
.app-icon-thumb {
  width: 40px; height: 40px;
  border-radius: 10px;
  object-fit: cover;
  background: #f1f5f9;
}
.qrcode-modal-img { max-width: 200px; border-radius: 12px; padding: 8px; background: #fff; border: 1px solid var(--border); }
.back-link { display: inline-flex; align-items: center; gap: 6px; color: var(--text-secondary); font-size: 14px; padding: 6px 12px; border-radius: var(--radius-sm); transition: all var(--transition); }
.back-link:hover { background: #f1f5f9; color: var(--primary); }

/* 两列布局 */
.two-column {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 20px;
  align-items: start;
}

/* 标签切换 */
.tab-bar {
  display: flex;
  gap: 2px;
  background: #f1f5f9;
  border-radius: 10px;
  padding: 3px;
  margin-bottom: 24px;
  overflow-x: auto;
}
.tab-bar .tab-item {
  padding: 8px 18px;
  border-radius: 8px;
  font-size: 13px; font-weight: 500;
  color: var(--text-secondary);
  cursor: pointer;
  white-space: nowrap;
  transition: all var(--transition);
  border: none;
  background: transparent;
}
.tab-bar .tab-item:hover { color: var(--text); background: rgba(255,255,255,0.5); }
.tab-bar .tab-item.active {
  background: #fff;
  color: var(--text);
  font-weight: 600;
  box-shadow: var(--shadow-sm);
}

/* ============================================
   Tabler图标按钮专用
   ============================================ */
.icon-btn {
  width: 34px; height: 34px;
  border-radius: 8px;
  border: 1px solid var(--border);
  background: #fff;
  color: var(--text-secondary);
  display: inline-flex; align-items: center; justify-content: center;
  font-size: 16px;
  cursor: pointer;
  transition: all var(--transition);
}
.icon-btn:hover { border-color: var(--primary); color: var(--primary); background: var(--primary-light); }

/* ============================================
   滚动条
   ============================================ */
::-webkit-scrollbar { width: 5px; height: 5px; }
::-webkit-scrollbar-track { background: transparent; }
::-webkit-scrollbar-thumb { background: #cbd5e1; border-radius: 3px; }
::-webkit-scrollbar-thumb:hover { background: #94a3b8; }

/* ============================================
   登录页
   ============================================ */
.login-page {
  min-height: 100vh;
  display: flex; align-items: center; justify-content: center;
  background: linear-gradient(135deg, #0f172a 0%, #1e1b4b 50%, #0f172a 100%);
  padding: 24px;
  position: relative;
  overflow: hidden;
}
.login-page::before {
  content: '';
  position: absolute;
  width: 600px; height: 600px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(99,102,241,0.12) 0%, transparent 70%);
  top: -200px; right: -200px;
}
.login-page::after {
  content: '';
  position: absolute;
  width: 400px; height: 400px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(139,92,246,0.08) 0%, transparent 70%);
  bottom: -100px; left: -100px;
}
.login-card {
  background: rgba(255,255,255,0.98);
  border-radius: 20px;
  padding: 48px 40px;
  width: 400px;
  max-width: 100%;
  box-shadow: 0 25px 60px rgba(0,0,0,0.3);
  position: relative;
  z-index: 1;
}
.login-logo { text-align: center; margin-bottom: 32px; }
.login-logo .logo-icon {
  width: 64px; height: 64px;
  background: var(--primary-gradient);
  border-radius: 18px;
  display: flex; align-items: center; justify-content: center;
  margin: 0 auto 18px;
  box-shadow: 0 8px 24px rgba(99,102,241,0.3);
  color: #fff; font-size: 28px;
}
.login-logo h4 { font-size: 20px; font-weight: 700; color: var(--text); margin: 0 0 6px; }
.login-logo p { font-size: 14px; color: var(--text-muted); margin: 0; }
.login-card .form-control { padding: 12px 16px; border-radius: 10px; }
.login-pwd-group .form-control { border-radius: 10px 0 0 10px; }
.login-pwd-group .login-pwd-toggle {
  border: 1.5px solid var(--border);
  border-left: 0;
  border-radius: 0 10px 10px 0;
  background: #fff;
  color: var(--text-muted);
  padding: 0 16px;
  display: flex;
  align-items: center;
}
.login-pwd-group .login-pwd-toggle:hover { color: var(--primary); background: var(--primary-light); }
.login-pwd-group .form-control:focus + .login-pwd-toggle {
  border-color: var(--primary);
  box-shadow: 0 0 0 3px rgba(99,102,241,0.1);
}
.login-back-link {
  color: var(--text-muted);
  font-size: 13px;
  transition: color var(--transition);
}
.login-back-link:hover { color: var(--primary); }

/* ============================================
   响应式
   ============================================ */
@media (max-width: 768px) {
  .sidebar {
    transform: translateX(-100%);
    width: 280px;
  }
  .sidebar.open { transform: translateX(0); }
  .sidebar-overlay.active { display: block; }
  .sidebar-toggle-mobile { display: flex; }
  .main-content, .main-content.expanded { margin-left: 0; }
  .top-navbar { padding: 0 16px; }
  .content-wrapper { padding: 16px; }
  .stat-cards { grid-template-columns: repeat(2, 1fr); gap: 12px; }
  .stat-card { padding: 18px; }
  .stat-card .stat-icon { width: 48px; height: 48px; font-size: 20px; }
  .stat-card .stat-number { font-size: 24px; }
  .card { padding: 18px; }
  .form-row { grid-template-columns: 1fr; }
  .two-column { grid-template-columns: 1fr; }
}

@media (max-width: 480px) {
  .stat-cards { grid-template-columns: 1fr; }
  .content-wrapper { padding: 12px; }
  .top-navbar { height: 56px; padding: 0 12px; }
  table { font-size: 13px; }
  thead th, tbody td { padding: 10px 12px; }
  .btn { padding: 8px 16px; font-size: 13px; }
  .card { padding: 14px; border-radius: 10px; }
  .login-card { padding: 32px 24px; }
}

@media print {
  .sidebar, .sidebar-overlay, .sidebar-toggle-mobile, .top-navbar { display: none; }
  .main-content { margin-left: 0; padding: 0; }
  .card { box-shadow: none; border: 1px solid var(--border); break-inside: avoid; }
}

/* ============================================
   工具类
   ============================================ */
.text-center { text-align: center; }
.text-right { text-align: right; }
.text-muted { color: var(--text-muted); }
.text-success { color: var(--success); }
.text-danger { color: var(--danger); }
.text-primary { color: var(--primary); }
.text-warning { color: var(--warning); }
.fw-semibold { font-weight: 600; }
.fw-bold { font-weight: 700; }
.mt-8 { margin-top: 8px; } .mt-16 { margin-top: 16px; } .mt-24 { margin-top: 24px; }
.mb-8 { margin-bottom: 8px; } .mb-16 { margin-bottom: 16px; } .mb-24 { margin-bottom: 24px; }
.flex { display: flex; }
.flex-between { display: flex; justify-content: space-between; align-items: center; }
.flex-gap { display: flex; gap: 10px; }
.flex-wrap { flex-wrap: wrap; }
.flex-center { display: flex; align-items: center; justify-content: center; }
.w-100 { width: 100%; }
.gap-8 { gap: 8px; } .gap-12 { gap: 12px; } .gap-16 { gap: 16px; }
.truncate { max-width: 200px; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }

/* ============================================
   视图模式切换 & 网格卡片
   ============================================ */
/* 视图切换栏 */
.view-toolbar {
  display: flex; justify-content: space-between; align-items: center;
  flex-wrap: wrap; gap: 10px; margin-bottom: 16px;
}
.view-toolbar .view-mode-group {
  display: flex; gap: 2px;
  background: #f1f5f9; border-radius: 10px; padding: 3px;
}
.view-mode-btn {
  width: 36px; height: 34px;
  border: none; background: transparent;
  border-radius: 8px; color: var(--text-muted);
  cursor: pointer; font-size: 15px;
  display: flex; align-items: center; justify-content: center;
  transition: all var(--transition);
}
.view-mode-btn:hover { color: var(--text); background: rgba(255,255,255,0.5); }
.view-mode-btn.active {
  background: #fff; color: var(--primary);
  font-weight: 600; box-shadow: var(--shadow-sm);
}

/* 筛选标签栏 */
.filter-bar {
  display: flex; flex-wrap: wrap; gap: 16px;
  margin-bottom: 16px; padding: 12px 16px;
  background: #f8fafc; border-radius: var(--radius-sm);
  border: 1px solid var(--border-light);
  align-items: center;
}
.filter-bar .filter-group {
  display: flex; align-items: center; gap: 6px;
}
.filter-bar .filter-label {
  font-size: 12px; font-weight: 600; color: var(--text-muted);
  white-space: nowrap;
}
.filter-bar .filter-chip {
  padding: 4px 12px;
  border-radius: 14px; font-size: 12px; font-weight: 500;
  border: 1px solid var(--border);
  background: #fff; color: var(--text-secondary);
  cursor: pointer; white-space: nowrap;
  transition: all var(--transition);
}
.filter-bar .filter-chip:hover { border-color: var(--primary); color: var(--primary); }
.filter-bar .filter-chip.active {
  background: var(--primary); color: #fff; border-color: var(--primary);
}

/* 搜索结果提示 */
.search-info {
  font-size: 12px; color: var(--text-muted);
  padding: 4px 0; margin-bottom: 8px;
}

/* 栅格视图 - 列数由CSS变量 --grid-cols 控制 */
.resource-grid {
  --grid-cols: 5;
  --grid-gap: 8px;
  display: grid;
  grid-template-columns: repeat(var(--grid-cols), minmax(0, 1fr));
  gap: var(--grid-gap);
  overflow: hidden;
  max-width: 100%;
}

/* 栅格视图 - 大图标 */
.resource-grid.grid-lg {
  --grid-cols: 3;
  --grid-gap: 16px;
}
.resource-grid.grid-lg .grid-card { padding: 20px; }
.resource-grid.grid-lg .grid-card .card-icon { 
  width: 56px; height: 56px; font-size: 24px; margin-bottom: 10px; 
}
.resource-grid.grid-lg .grid-card .card-name { font-size: 15px; }
.resource-grid.grid-lg .grid-card .card-meta { font-size: 12px; margin-top: 6px; }
.resource-grid.grid-lg .grid-card .card-actions { margin-top: 12px; }

/* 栅格视图 - 中图标 */
.resource-grid.grid-md {
  --grid-cols: 4;
  --grid-gap: 12px;
}
.resource-grid.grid-md .grid-card { padding: 14px; }
.resource-grid.grid-md .grid-card .card-icon { 
  width: 44px; height: 44px; font-size: 20px; margin-bottom: 8px; 
}
.resource-grid.grid-md .grid-card .card-name { font-size: 14px; }
.resource-grid.grid-md .grid-card .card-meta { font-size: 11px; margin-top: 4px; }
.resource-grid.grid-md .grid-card .card-actions { margin-top: 8px; gap:4px; }

/* 栅格视图 - 小图标 */
.resource-grid.grid-sm {
  --grid-cols: 6;
  --grid-gap: 8px;
}
.resource-grid.grid-sm .grid-card { 
  padding: 10px; text-align: center; 
}
.resource-grid.grid-sm .grid-card .card-icon { 
  width: 32px; height: 32px; font-size: 16px; margin: 0 auto 6px; 
}
.resource-grid.grid-sm .grid-card .card-name { 
  font-size: 12px; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; 
}
.resource-grid.grid-sm .grid-card .card-meta { display: none; }
.resource-grid.grid-sm .grid-card .card-tags { display: none; }
.resource-grid.grid-sm .grid-card .card-actions { 
  margin-top: 6px; flex-direction: column; gap: 3px;
}
.resource-grid.grid-sm .grid-card .card-actions .btn { 
  width: 100%; padding: 3px 5px; font-size: 10px; 
}

/* 列数调节滑块 */
.col-slider-wrap {
  display: flex; align-items: center; gap: 6px;
}
.col-slider-wrap label {
  font-size: 11px; color: var(--text-muted); white-space: nowrap;
}
.col-slider-wrap input[type="range"] {
  width: 80px; accent-color: var(--primary);
}
.col-slider-wrap .col-count {
  font-size: 12px; font-weight: 600; color: var(--primary);
  min-width: 16px; text-align: center;
}

/* 网格卡片通用 */
.grid-card {
  background: #fff;
  border-radius: var(--radius);
  border: 1px solid var(--border);
  transition: all var(--transition);
  display: flex; flex-direction: column;
  cursor: pointer;
  position: relative;
}
.grid-card:hover {
  box-shadow: var(--shadow-md);
  border-color: var(--primary);
  transform: translateY(-2px);
}
.grid-card.pinned { border-color: #f59e0b; }
.grid-card .card-pin-badge {
  position: absolute; top: 8px; right: 8px;
  color: #f59e0b; font-size: 13px;
}
.grid-card .card-icon {
  border-radius: 12px; background: var(--primary-light);
  display: flex; align-items: center; justify-content: center;
  color: var(--primary); flex-shrink: 0; overflow: hidden;
}
.grid-card .card-icon img {
  width: 100%; height: 100%; object-fit: cover;
}
.grid-card .card-name { font-weight: 600; color: var(--text); line-height: 1.3; }
.grid-card .card-meta { color: var(--text-muted); }
.grid-card .card-tags {
  display: flex; flex-wrap: wrap; gap: 4px; margin-top: 4px;
}
.grid-card .card-tags .tag {
  padding: 2px 8px; border-radius: 10px;
  font-size: 10px; font-weight: 600; 
}
.grid-card .card-tags .tag-type { background: var(--primary-light); color: var(--primary-dark); }
.grid-card .card-tags .tag-platform { background: var(--success-light); color: #059669; }
.grid-card .card-actions {
  display: flex; gap: 4px; margin-top: auto;
  flex-wrap: nowrap;
  overflow-x: auto;
}
.grid-card .card-actions .btn { font-size: 11px; padding: 5px 8px; flex-shrink: 0; }

/* 详情视图（表格模式沿用原有样式） */
.resource-grid.grid-detail { display: none; }
#resourceTableContainer { display: none; }
#resourceTableContainer.show { display: block; }

/* 操作按钮组：单排不换行 */
.btn-group-gap {
  display: inline-flex !important;
  flex-wrap: nowrap !important;
  gap: 4px !important;
  align-items: center;
}
.btn-group-gap .btn,
.btn-group-gap > .btn {
  padding: 5px 8px !important;
  font-size: 12px !important;
  white-space: nowrap;
  flex-shrink: 0;
}

/* 响应式覆盖 - 使用CSS变量已自动适配，仅需微调 */
@media (max-width: 1200px) {
  .resource-grid.grid-sm { --grid-cols: 5; }
  .resource-grid.grid-md { --grid-cols: 3; }
}
@media (max-width: 992px) {
  .resource-grid.grid-lg { --grid-cols: 2; }
  .resource-grid.grid-md { --grid-cols: 3; }
  .resource-grid.grid-sm { --grid-cols: 4; }
}
@media (max-width: 768px) {
  .resource-grid.grid-lg { --grid-cols: 2; }
  .resource-grid.grid-md { --grid-cols: 2; }
  .resource-grid.grid-sm { --grid-cols: 4; }
  .filter-bar { gap: 10px; padding: 10px; }
  .filter-bar .filter-chip { padding: 3px 10px; font-size: 11px; }
}
@media (max-width: 480px) {
  .resource-grid.grid-lg { --grid-cols: 1; }
  .resource-grid.grid-md { --grid-cols: 2; }
  .resource-grid.grid-sm { --grid-cols: 3; }
  .view-toolbar { flex-direction: column; align-items: stretch; }
}

/* ============================================================
   美化增强 v2.3 —— 背景氛围 / 侧边栏 / 卡片质感 / 交互动效
   ============================================================ */
/* 背景渐变光晕 */
body {
  background:
    radial-gradient(900px 480px at 92% -10%, rgba(99,102,241,.08), transparent 60%),
    radial-gradient(760px 420px at -8% 15%, rgba(139,92,246,.07), transparent 55%),
    var(--body-bg);
  background-attachment: fixed;
}
::-webkit-scrollbar { width: 10px; height: 10px; }
::-webkit-scrollbar-track { background: #eef1f8; }
::-webkit-scrollbar-thumb {
  background: linear-gradient(180deg, #6366f1, #8b5cf6);
  border-radius: 8px; border: 2px solid #eef1f8;
}

/* 侧边栏 */
.sidebar { background: linear-gradient(180deg, #0f172a 0%, #171b3a 100%); }
.sidebar-header .brand-icon {
  box-shadow: 0 4px 14px rgba(99,102,241,.5);
}
.sidebar-menu a.active {
  background: linear-gradient(135deg, rgba(99,102,241,.28), rgba(139,92,246,.16));
  box-shadow: inset 3px 0 0 #8b5cf6, 0 4px 14px rgba(99,102,241,.18);
}
.sidebar-menu a.active i { color: #a5b4fc; }
.sidebar-menu::-webkit-scrollbar { width: 6px; }
.sidebar-menu::-webkit-scrollbar-track { background: transparent; }
.sidebar-menu::-webkit-scrollbar-thumb { background: rgba(255,255,255,.18); border: none; }

/* 顶部导航栏：渐变下划线 */
.top-navbar {
  background: rgba(255,255,255,.82);
  box-shadow: 0 1px 0 rgba(99,102,241,.12), 0 8px 24px rgba(15,23,42,.04);
}
.top-navbar .page-title { color: var(--text); }
.top-navbar .user-info {
  background: linear-gradient(135deg, var(--primary-light), #faf5ff);
  border: 1px solid rgba(99,102,241,.15);
}

/* 卡片：入场动画 + 顶部渐变描边 */
.card {
  position: relative;
  animation: adminCardIn .4s ease backwards;
}
.card::before {
  content: ''; position: absolute; top: 0; left: 22px; right: 22px; height: 1px;
  background: linear-gradient(90deg, transparent, rgba(99,102,241,.5), rgba(139,92,246,.4), transparent);
  opacity: .8;
}
.card:hover {
  transform: translateY(-2px);
  box-shadow: 0 12px 28px rgba(79,70,229,.10), var(--shadow-md);
}
.content-wrapper > *:nth-child(2) { animation-delay: .05s; }
.content-wrapper > *:nth-child(3) { animation-delay: .10s; }
.content-wrapper > *:nth-child(4) { animation-delay: .15s; }
.content-wrapper > *:nth-child(5) { animation-delay: .20s; }
@keyframes adminCardIn {
  from { opacity: 0; transform: translateY(10px); }
  to { opacity: 1; transform: none; }
}

/* 统计卡片 */
.stat-card {
  position: relative;
  animation: adminCardIn .4s ease backwards;
}
.stat-card:hover {
  transform: translateY(-4px);
  box-shadow: 0 16px 34px rgba(79,70,229,.14), var(--shadow-lg);
  border-color: rgba(99,102,241,.25);
}
.stat-card .stat-icon {
  background: linear-gradient(135deg, var(--primary), var(--primary-dark));
  color: #fff !important;
  box-shadow: 0 6px 16px rgba(99,102,241,.35);
}
.stat-card .stat-icon.green { background: linear-gradient(135deg, #10b981, #059669); box-shadow: 0 6px 16px rgba(16,185,129,.35); }
.stat-card .stat-icon.orange { background: linear-gradient(135deg, #f59e0b, #d97706); box-shadow: 0 6px 16px rgba(245,158,11,.35); }
.stat-card .stat-icon.red { background: linear-gradient(135deg, #ef4444, #dc2626); box-shadow: 0 6px 16px rgba(239,68,68,.35); }
.stat-card .stat-icon.blue { background: linear-gradient(135deg, #6366f1, #8b5cf6); box-shadow: 0 6px 16px rgba(99,102,241,.35); }
.stat-card .stat-number {
  background: linear-gradient(135deg, #4f46e5, #8b5cf6);
  -webkit-background-clip: text; background-clip: text;
  -webkit-text-fill-color: transparent;
}

/* 主按钮 */
.btn-primary {
  background: linear-gradient(135deg, #6366f1, #8b5cf6);
  border: none;
  box-shadow: 0 4px 14px rgba(99,102,241,.30);
}
.btn-primary:hover {
  box-shadow: 0 8px 22px rgba(99,102,241,.42);
}

/* 表格行悬浮 */
.table tbody tr, table tbody tr { transition: background .15s; }
.table tbody tr:hover, table tbody tr:hover { background: var(--border-light); }

/* 登录页入场动效 */
.login-card { animation: adminCardIn .5s ease backwards; }
.login-page::before, .login-page::after { animation: loginGlow 6s ease-in-out infinite alternate; }
@keyframes loginGlow {
  from { opacity: .7; transform: scale(1); }
  to { opacity: 1; transform: scale(1.12); }
}