/* ===== 全局重置 ===== */
*, *::before, *::after {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

:root {
  --primary: #4f7cff;
  --primary-dark: #3a63e0;
  --primary-light: #eef3ff;
  --success: #22c55e;
  --success-light: #f0fdf4;
  --warning: #f59e0b;
  --warning-light: #fffbeb;
  --danger: #ef4444;
  --danger-light: #fef2f2;
  --info: #0ea5e9;
  --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;
  --bg: #f0f2f5;
  --card-bg: #ffffff;
  --text: #1f2937;
  --text-light: #6b7280;
  --border: #e5e7eb;
  --sidebar-bg: #1e293b;
  --sidebar-text: #cbd5e1;
  --sidebar-active: #4f7cff;
  --radius: 10px;
  --radius-sm: 6px;
  --shadow: 0 1px 3px rgba(0,0,0,0.08);
  --shadow-md: 0 4px 12px rgba(0,0,0,0.1);
  --shadow-lg: 0 8px 24px rgba(0,0,0,0.12);
  --sidebar-w: 220px;
  --sidebar-w-collapsed: 64px;
  --topbar-h: 60px;
  --transition: all 0.2s ease;
}

html, body {
  height: 100%;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Microsoft YaHei", sans-serif;
  font-size: 14px;
  color: var(--text);
  background: var(--bg);
  line-height: 1.6;
  overflow: hidden;
}

#app {
  display: flex;
  height: 100vh;
}

/* ===== 侧边栏 ===== */
.sidebar {
  width: var(--sidebar-w);
  background: var(--sidebar-bg);
  color: var(--sidebar-text);
  display: flex;
  flex-direction: column;
  transition: var(--transition);
  flex-shrink: 0;
  z-index: 100;
}

.sidebar.collapsed {
  width: var(--sidebar-w-collapsed);
}

.sidebar-header {
  padding: 0 18px;
  height: var(--topbar-h);
  display: flex;
  align-items: center;
  justify-content: space-between;
  border-bottom: 1px solid rgba(255,255,255,0.08);
}

.logo {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 18px;
  font-weight: 700;
  color: #fff;
  white-space: nowrap;
  overflow: hidden;
}

.logo-icon { font-size: 24px; }

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

.sidebar-toggle {
  background: none;
  border: none;
  color: var(--sidebar-text);
  font-size: 18px;
  cursor: pointer;
  padding: 4px;
  border-radius: 4px;
  transition: var(--transition);
}
.sidebar-toggle:hover { color: #fff; background: rgba(255,255,255,0.1); }

.sidebar-nav {
  flex: 1;
  padding: 12px 0;
  overflow-y: auto;
  overflow-x: hidden;
}

.nav-item {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 11px 20px;
  color: var(--sidebar-text);
  text-decoration: none;
  transition: var(--transition);
  white-space: nowrap;
  border-left: 3px solid transparent;
  font-size: 14px;
}

.nav-item:hover {
  background: rgba(255,255,255,0.06);
  color: #fff;
}

.nav-item.active {
  background: rgba(79,124,255,0.15);
  color: #fff;
  border-left-color: var(--sidebar-active);
}

.nav-icon { font-size: 18px; flex-shrink: 0; width: 20px; text-align: center; }

.sidebar.collapsed .nav-label { display: none; }
.sidebar.collapsed .nav-item { justify-content: center; padding: 11px 0; }

.sidebar-footer {
  padding: 14px 18px;
  border-top: 1px solid rgba(255,255,255,0.08);
}

.sidebar.collapsed .store-info { display: none; }

.store-name { color: #fff; font-weight: 600; font-size: 13px; }
.store-meta { color: var(--gray-400); font-size: 12px; margin-top: 2px; }

/* ===== 主内容区 ===== */
.main-content {
  flex: 1;
  display: flex;
  flex-direction: column;
  overflow: hidden;
}

.topbar {
  height: var(--topbar-h);
  background: var(--card-bg);
  border-bottom: 1px solid var(--border);
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 24px;
  flex-shrink: 0;
}

.page-title {
  font-size: 18px;
  font-weight: 600;
  color: var(--gray-800);
}

.topbar-right {
  display: flex;
  align-items: center;
  gap: 16px;
}

.search-box {
  position: relative;
  width: 280px;
}

.search-icon {
  position: absolute;
  left: 10px;
  top: 50%;
  transform: translateY(-50%);
  font-size: 14px;
  opacity: 0.5;
}

.search-box input {
  width: 100%;
  padding: 8px 12px 8px 32px;
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  font-size: 13px;
  outline: none;
  transition: var(--transition);
  background: var(--gray-50);
}

.search-box input:focus {
  border-color: var(--primary);
  background: #fff;
  box-shadow: 0 0 0 3px rgba(79,124,255,0.1);
}

.topbar-date {
  font-size: 13px;
  color: var(--text-light);
  white-space: nowrap;
}

.page-content {
  flex: 1;
  overflow-y: auto;
  padding: 20px 24px;
}

/* ===== 通用组件 ===== */
.card {
  background: var(--card-bg);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: 20px;
  margin-bottom: 16px;
}

.card-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 16px;
}

.card-title {
  font-size: 16px;
  font-weight: 600;
  color: var(--gray-800);
}

/* 按钮 */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 8px 16px;
  border: none;
  border-radius: var(--radius-sm);
  font-size: 13px;
  font-weight: 500;
  cursor: pointer;
  transition: var(--transition);
  text-decoration: none;
  white-space: nowrap;
}

.btn-primary {
  background: var(--primary);
  color: #fff;
}
.btn-primary:hover { background: var(--primary-dark); }

.btn-success { background: var(--success); color: #fff; }
.btn-success:hover { opacity: 0.9; }

.btn-danger { background: var(--danger); color: #fff; }
.btn-danger:hover { opacity: 0.9; }

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

.btn-sm { padding: 5px 10px; font-size: 12px; }
.btn-icon {
  padding: 6px 8px;
  background: transparent;
  border: none;
  cursor: pointer;
  font-size: 16px;
  border-radius: 4px;
  transition: var(--transition);
}
.btn-icon:hover { background: var(--gray-100); }

/* 统计卡片 */
.stat-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 16px;
  margin-bottom: 20px;
}

.stat-card {
  background: var(--card-bg);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: 20px;
  display: flex;
  align-items: flex-start;
  gap: 16px;
  transition: var(--transition);
}

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

.stat-icon {
  width: 48px;
  height: 48px;
  border-radius: 12px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 22px;
  flex-shrink: 0;
}

.stat-icon.blue { background: var(--primary-light); }
.stat-icon.green { background: var(--success-light); }
.stat-icon.orange { background: var(--warning-light); }
.stat-icon.red { background: var(--danger-light); }
.stat-icon.purple { background: #f5f3ff; }

.stat-body { flex: 1; }
.stat-label { font-size: 13px; color: var(--text-light); margin-bottom: 4px; }
.stat-value { font-size: 26px; font-weight: 700; color: var(--gray-800); }
.stat-sub { font-size: 12px; margin-top: 4px; }
.stat-sub.up { color: var(--success); }
.stat-sub.down { color: var(--danger); }

/* 表格 */
.table-wrap {
  background: var(--card-bg);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  overflow: hidden;
}

.table-toolbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 16px 20px;
  border-bottom: 1px solid var(--border);
  flex-wrap: wrap;
  gap: 12px;
}

.table-toolbar-left {
  display: flex;
  align-items: center;
  gap: 12px;
  flex-wrap: wrap;
}

.table-toolbar-right {
  display: flex;
  align-items: center;
  gap: 8px;
}

.filter-select, .filter-input {
  padding: 7px 12px;
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  font-size: 13px;
  outline: none;
  background: var(--gray-50);
  transition: var(--transition);
}

.filter-select:focus, .filter-input:focus {
  border-color: var(--primary);
  background: #fff;
}

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

thead th {
  background: var(--gray-50);
  padding: 12px 16px;
  text-align: left;
  font-size: 13px;
  font-weight: 600;
  color: var(--gray-600);
  border-bottom: 1px solid var(--border);
  white-space: nowrap;
}

tbody td {
  padding: 12px 16px;
  font-size: 13px;
  color: var(--gray-700);
  border-bottom: 1px solid var(--gray-100);
}

tbody tr:hover { background: var(--gray-50); }
tbody tr:last-child td { border-bottom: none; }

/* 状态标签 */
.tag {
  display: inline-block;
  padding: 3px 10px;
  border-radius: 20px;
  font-size: 12px;
  font-weight: 500;
}

.tag-green { background: var(--success-light); color: #16a34a; }
.tag-blue { background: var(--primary-light); color: var(--primary-dark); }
.tag-orange { background: var(--warning-light); color: #d97706; }
.tag-red { background: var(--danger-light); color: #dc2626; }
.tag-gray { background: var(--gray-100); color: var(--gray-500); }

/* 分页 */
.pagination {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 12px 20px;
  border-top: 1px solid var(--border);
}

.page-info { font-size: 13px; color: var(--text-light); }
.page-btns { display: flex; gap: 4px; }

.page-btn {
  padding: 5px 10px;
  border: 1px solid var(--border);
  background: #fff;
  border-radius: 4px;
  font-size: 13px;
  cursor: pointer;
  transition: var(--transition);
}
.page-btn:hover:not(:disabled) { border-color: var(--primary); color: var(--primary); }
.page-btn.active { background: var(--primary); color: #fff; border-color: var(--primary); }
.page-btn:disabled { opacity: 0.4; cursor: not-allowed; }

/* 空状态 */
.empty-state {
  text-align: center;
  padding: 60px 20px;
  color: var(--text-light);
}
.empty-state .empty-icon { font-size: 48px; margin-bottom: 12px; opacity: 0.5; }
.empty-state .empty-text { font-size: 14px; }

/* IMEI 文本 */
.imei-text { font-family: 'Courier New', monospace; font-size: 12px; color: var(--text-light); }

/* ===== 模态框 ===== */
.modal-overlay {
  display: none;
  position: fixed;
  top: 0; left: 0; right: 0; bottom: 0;
  background: rgba(0,0,0,0.45);
  z-index: 1000;
  align-items: center;
  justify-content: center;
}

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

.modal {
  background: #fff;
  border-radius: 12px;
  width: 520px;
  max-width: 90vw;
  max-height: 90vh;
  overflow: hidden;
  display: flex;
  flex-direction: column;
  box-shadow: var(--shadow-lg);
  animation: modalIn 0.2s ease;
}

@keyframes modalIn {
  from { transform: scale(0.95); opacity: 0; }
  to { transform: scale(1); opacity: 1; }
}

.modal-header {
  padding: 18px 24px;
  border-bottom: 1px solid var(--border);
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.modal-title { font-size: 17px; font-weight: 600; color: var(--gray-800); }

.modal-close {
  background: none;
  border: none;
  font-size: 22px;
  cursor: pointer;
  color: var(--gray-400);
  line-height: 1;
  padding: 0;
}
.modal-close:hover { color: var(--gray-600); }

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

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

/* 表单 */
.form-group {
  margin-bottom: 16px;
}

.form-row {
  display: flex;
  gap: 16px;
}
.form-row .form-group { flex: 1; }

.form-label {
  display: block;
  font-size: 13px;
  font-weight: 500;
  color: var(--gray-600);
  margin-bottom: 6px;
}

.form-label .req { color: var(--danger); }

.form-input, .form-select, .form-textarea {
  width: 100%;
  padding: 9px 12px;
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  font-size: 14px;
  outline: none;
  transition: var(--transition);
  background: #fff;
  font-family: inherit;
}

.form-input:focus, .form-select:focus, .form-textarea:focus {
  border-color: var(--primary);
  box-shadow: 0 0 0 3px rgba(79,124,255,0.1);
}

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

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

/* ===== Toast ===== */
.toast-container {
  position: fixed;
  top: 20px;
  right: 20px;
  z-index: 2000;
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.toast {
  background: #fff;
  border-radius: 8px;
  padding: 12px 20px;
  box-shadow: var(--shadow-lg);
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 14px;
  animation: toastIn 0.3s ease;
  border-left: 4px solid var(--primary);
  min-width: 240px;
}

.toast.success { border-left-color: var(--success); }
.toast.error { border-left-color: var(--danger); }
.toast.warning { border-left-color: var(--warning); }

@keyframes toastIn {
  from { transform: translateX(100%); opacity: 0; }
  to { transform: translateX(0); opacity: 1; }
}

/* ===== Dashboard 布局 ===== */
.dashboard-grid {
  display: grid;
  grid-template-columns: 2fr 1fr;
  gap: 16px;
  margin-bottom: 16px;
}

.chart-container {
  width: 100%;
  height: 300px;
}

.chart-container-sm {
  width: 100%;
  height: 240px;
}

/* 快捷操作 */
.quick-actions {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 12px;
  margin-bottom: 20px;
}

.quick-action {
  background: var(--card-bg);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: 20px;
  text-align: center;
  cursor: pointer;
  transition: var(--transition);
  border: 1px solid transparent;
}

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

.quick-action .qa-icon { font-size: 32px; margin-bottom: 8px; }
.quick-action .qa-label { font-size: 13px; font-weight: 500; color: var(--gray-700); }

/* 库龄预警条 */
.stock-age-bar {
  height: 6px;
  border-radius: 3px;
  background: var(--gray-200);
  overflow: hidden;
  position: relative;
  width: 80px;
  display: inline-block;
  vertical-align: middle;
}
.stock-age-bar .fill {
  height: 100%;
  border-radius: 3px;
  transition: width 0.3s;
}

/* Tabs */
.tabs {
  display: flex;
  gap: 0;
  border-bottom: 2px solid var(--border);
  margin-bottom: 16px;
}

.tab {
  padding: 10px 20px;
  font-size: 14px;
  font-weight: 500;
  color: var(--text-light);
  cursor: pointer;
  border-bottom: 2px solid transparent;
  margin-bottom: -2px;
  transition: var(--transition);
}

.tab:hover { color: var(--primary); }
.tab.active { color: var(--primary); border-bottom-color: var(--primary); }

/* 详情面板 */
.detail-row {
  display: flex;
  padding: 10px 0;
  border-bottom: 1px solid var(--gray-100);
}
.detail-row:last-child { border-bottom: none; }
.detail-label {
  width: 100px;
  font-size: 13px;
  color: var(--text-light);
  flex-shrink: 0;
}
.detail-value {
  font-size: 13px;
  color: var(--gray-800);
  font-weight: 500;
}

/* 响应式 */
@media (max-width: 768px) {
  .sidebar { width: var(--sidebar-w-collapsed); }
  .sidebar .nav-label, .sidebar .logo-text, .sidebar .store-info { display: none; }
  .search-box { width: 160px; }
  .dashboard-grid { grid-template-columns: 1fr; }
  .quick-actions { grid-template-columns: repeat(2, 1fr); }
  .topbar-date { display: none; }
}

/* 滚动条美化 */
::-webkit-scrollbar { width: 6px; height: 6px; }
::-webkit-scrollbar-thumb { background: var(--gray-300); border-radius: 3px; }
::-webkit-scrollbar-thumb:hover { background: var(--gray-400); }
::-webkit-scrollbar-track { background: transparent; }