/* ==========================================
   PTSP 图库系统 - 全局样式
   设计风格：深色主题 + 紫蓝渐变 + 现代玻璃拟态
   ==========================================*/

/* ——— CSS 变量（设计令牌） ——— */
:root {
  /* 主色调 */
  --color-primary: #7c3aed;
  --color-primary-light: #a78bfa;
  --color-secondary: #2563eb;
  --color-accent: #06b6d4;

  /* 背景 */
  --bg-base: #080810;
  --bg-surface: #10101c;
  --bg-card: #14142a;
  --bg-card-hover: #1e1e38;
  --bg-elevated: #1a1a32;
  --bg-glass: rgba(20, 20, 42, 0.85);

  /* 边框 */
  --border-color: rgba(124, 58, 237, 0.15);
  --border-color-hover: rgba(124, 58, 237, 0.4);

  /* 文字 */
  --text-primary: #f1f5f9;
  --text-secondary: #94a3b8;
  --text-muted: #64748b;
  --text-accent: #a78bfa;

  /* 状态色 */
  --color-success: #10b981;
  --color-warning: #f59e0b;
  --color-danger: #ef4444;
  --color-whatsapp: #25d366;

  /* 阴影 */
  --shadow-sm: 0 1px 3px rgba(0,0,0,0.4);
  --shadow-md: 0 4px 16px rgba(0,0,0,0.5);
  --shadow-lg: 0 8px 32px rgba(0,0,0,0.6);
  --shadow-glow: 0 0 20px rgba(124, 58, 237, 0.3);

  /* 间距 */
  --space-xs: 4px;
  --space-sm: 8px;
  --space-md: 16px;
  --space-lg: 24px;
  --space-xl: 32px;
  --space-2xl: 48px;

  /* 圆角 */
  --radius-sm: 6px;
  --radius-md: 10px;
  --radius-lg: 16px;
  --radius-xl: 24px;
  --radius-full: 9999px;

  /* 过渡 */
  --transition-fast: 150ms ease;
  --transition-normal: 250ms ease;
  --transition-slow: 400ms ease;

  /* 布局 */
  --sidebar-width: 240px;
  --header-height: 64px;
}

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

html {
  font-size: 15px;
  scroll-behavior: smooth;
}

body {
  font-family: 'Inter', 'PingFang SC', 'Microsoft YaHei', sans-serif;
  background-color: var(--bg-base);
  color: var(--text-primary);
  line-height: 1.6;
  min-height: 100vh;
  -webkit-font-smoothing: antialiased;
}

a {
  color: inherit;
  text-decoration: none;
}

img {
  display: block;
  max-width: 100%;
}

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

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

/* ——— 滚动条美化 ——— */
::-webkit-scrollbar { width: 6px; height: 6px; }
::-webkit-scrollbar-track { background: var(--bg-base); }
::-webkit-scrollbar-thumb {
  background: rgba(124, 58, 237, 0.4);
  border-radius: var(--radius-full);
}
::-webkit-scrollbar-thumb:hover { background: var(--color-primary); }

/* ==========================================
   通用组件
   ==========================================*/

/* 按钮 */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-xs);
  padding: 10px 20px;
  border-radius: var(--radius-md);
  font-size: 14px;
  font-weight: 500;
  transition: all var(--transition-fast);
  cursor: pointer;
  white-space: nowrap;
}

.btn--primary {
  background: linear-gradient(135deg, var(--color-primary), var(--color-secondary));
  color: #fff;
  box-shadow: var(--shadow-glow);
}
.btn--primary:hover {
  opacity: 0.9;
  transform: translateY(-1px);
  box-shadow: 0 0 30px rgba(124, 58, 237, 0.5);
}

.btn--outline {
  border: 1px solid var(--border-color-hover);
  color: var(--text-primary);
  background: transparent;
}
.btn--outline:hover {
  background: var(--bg-elevated);
  border-color: var(--color-primary-light);
}

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

.btn--danger {
  background: rgba(239, 68, 68, 0.15);
  color: var(--color-danger);
  border: 1px solid rgba(239, 68, 68, 0.3);
}
.btn--danger:hover {
  background: rgba(239, 68, 68, 0.25);
}

.btn--warning {
  background: rgba(245, 158, 11, 0.15);
  color: var(--color-warning);
  border: 1px solid rgba(245, 158, 11, 0.3);
}
.btn--warning:hover { background: rgba(245, 158, 11, 0.25); }

.btn--whatsapp {
  background: var(--color-whatsapp);
  color: #fff;
  font-weight: 600;
}
.btn--whatsapp:hover {
  background: #1ebe57;
  transform: translateY(-1px);
}

.btn--xs {
  padding: 4px 10px;
  font-size: 12px;
  border-radius: var(--radius-sm);
}

.btn--full { width: 100%; }

.btn:disabled {
  opacity: 0.5;
  cursor: not-allowed;
  transform: none !important;
}

/* 输入框 */
.input {
  width: 100%;
  padding: 10px 14px;
  background: var(--bg-elevated);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  color: var(--text-primary);
  font-size: 14px;
  transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
  outline: none;
}

.input:focus {
  border-color: var(--color-primary);
  box-shadow: 0 0 0 3px rgba(124, 58, 237, 0.15);
}

.input::placeholder { color: var(--text-muted); }

/* 标签 */
.tag {
  display: inline-flex;
  align-items: center;
  padding: 2px 8px;
  border-radius: var(--radius-full);
  font-size: 11px;
  font-weight: 500;
}

.tag--cat1 { background: rgba(124, 58, 237, 0.2); color: var(--color-primary-light); }
.tag--cat2 { background: rgba(6, 182, 212, 0.2); color: var(--color-accent); }
.tag--cat3 { background: rgba(16, 185, 129, 0.2); color: var(--color-success); }

/* Toast 通知 */
.toast {
  position: fixed;
  bottom: 32px;
  left: 50%;
  transform: translateX(-50%) translateY(80px);
  background: var(--bg-elevated);
  color: var(--text-primary);
  padding: 12px 24px;
  border-radius: var(--radius-full);
  font-size: 14px;
  font-weight: 500;
  box-shadow: var(--shadow-lg);
  border: 1px solid var(--border-color);
  z-index: 9999;
  transition: transform var(--transition-normal), opacity var(--transition-normal);
  opacity: 0;
  pointer-events: none;
}

.toast--visible {
  transform: translateX(-50%) translateY(0);
  opacity: 1;
}

.toast--success { border-color: rgba(16, 185, 129, 0.5); color: #6ee7b7; }
.toast--error { border-color: rgba(239, 68, 68, 0.5); color: #fca5a5; }

/* 模态框 */
.modal {
  display: none;
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.7);
  backdrop-filter: blur(4px);
  z-index: 1000;
  align-items: center;
  justify-content: center;
  padding: var(--space-md);
}

.modal__box {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: var(--space-xl);
  width: 100%;
  max-width: 480px;
  box-shadow: var(--shadow-lg);
}

.modal__title {
  font-size: 18px;
  font-weight: 600;
  margin-bottom: var(--space-lg);
}

/* ==========================================
   页首导航栏
   ==========================================*/
.header {
  position: sticky;
  top: 0;
  z-index: 100;
  height: var(--header-height);
  background: var(--bg-glass);
  backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--border-color);
  display: flex;
  align-items: center;
  padding: 0 var(--space-xl);
  gap: var(--space-lg);
}

.header__logo {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  font-size: 20px;
  font-weight: 700;
  background: linear-gradient(135deg, var(--color-primary-light), var(--color-accent));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  flex-shrink: 0;
}

.header__logo-icon {
  width: 32px;
  height: 32px;
  background: linear-gradient(135deg, var(--color-primary), var(--color-secondary));
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 16px;
  -webkit-text-fill-color: white;
}

.header__search-wrap {
  flex: 1;
  max-width: 480px;
  position: relative;
}

.header__search-icon {
  position: absolute;
  left: 12px;
  top: 50%;
  transform: translateY(-50%);
  color: var(--text-muted);
  pointer-events: none;
}

.header__search-input {
  width: 100%;
  padding: 9px 40px 9px 38px;
  background: var(--bg-elevated);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-full);
  color: var(--text-primary);
  font-size: 14px;
  outline: none;
  transition: all var(--transition-fast);
}

.header__search-input:focus {
  border-color: var(--color-primary);
  box-shadow: 0 0 0 3px rgba(124, 58, 237, 0.15);
  background: var(--bg-card);
}

.header__search-input::placeholder { color: var(--text-muted); }

.header__search-clear {
  position: absolute;
  right: 10px;
  top: 50%;
  transform: translateY(-50%);
  display: none;
  align-items: center;
  justify-content: center;
  width: 20px;
  height: 20px;
  border-radius: 50%;
  background: var(--text-muted);
  color: var(--bg-base);
  font-size: 12px;
  cursor: pointer;
  border: none;
}

.header__actions {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  margin-left: auto;
  flex-shrink: 0;
}

.header__mobile-toggle {
  display: none;
  color: var(--text-primary);
  font-size: 22px;
}

/* ==========================================
   首页主布局
   ==========================================*/
.layout {
  display: flex;
  min-height: calc(100vh - var(--header-height));
}

/* ——— 侧边栏 ——— */
.sidebar {
  width: var(--sidebar-width);
  flex-shrink: 0;
  background: var(--bg-surface);
  border-right: 1px solid var(--border-color);
  overflow-y: auto;
  position: sticky;
  top: var(--header-height);
  height: calc(100vh - var(--header-height));
  padding: var(--space-md) 0;
}

.sidebar__section-title {
  font-size: 11px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--text-muted);
  padding: var(--space-md) var(--space-md) var(--space-xs);
}

/* 分类导航 */
.category-nav { list-style: none; }

.cat-item { position: relative; }

.cat-link {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  padding: 8px var(--space-md);
  color: var(--text-secondary);
  font-size: 14px;
  font-weight: 500;
  transition: all var(--transition-fast);
  cursor: pointer;
}

.cat-link:hover {
  color: var(--text-primary);
  background: var(--bg-elevated);
}

.cat-item--active > .cat-link {
  color: var(--color-primary-light);
  background: rgba(124, 58, 237, 0.1);
}

.cat-icon { font-size: 16px; flex-shrink: 0; }
.cat-name { flex: 1; }

.cat-arrow {
  font-size: 18px;
  color: var(--text-muted);
  transition: transform var(--transition-fast);
  flex-shrink: 0;
}
.cat-arrow--open { transform: rotate(90deg); }

/* 二级分类 */
.cat-sub-list {
  list-style: none;
  display: none;
  padding-left: var(--space-xl);
}
.cat-sub-list--open { display: block; }

.cat-sub-link {
  display: block;
  padding: 6px var(--space-md);
  color: var(--text-secondary);
  font-size: 13px;
  transition: all var(--transition-fast);
  cursor: pointer;
  border-radius: var(--radius-sm);
}
.cat-sub-link:hover { color: var(--text-primary); background: var(--bg-elevated); }
.cat-sub-item--active > .cat-sub-link {
  color: var(--color-primary-light);
  font-weight: 500;
}

/* 三级分类（品牌） */
.cat-brand-list {
  list-style: none;
  display: none;
  padding-left: var(--space-md);
}
.cat-brand-list--open { display: block; }

.cat-brand-link {
  display: block;
  padding: 4px var(--space-sm);
  color: var(--text-muted);
  font-size: 12px;
  cursor: pointer;
  transition: color var(--transition-fast);
}
.cat-brand-link:hover { color: var(--text-secondary); }
.cat-brand-item--active > .cat-brand-link { color: var(--color-accent); }

/* ——— 主内容区 ——— */
.main-content {
  flex: 1;
  padding: var(--space-xl);
  min-width: 0;
}

.main-content__header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: var(--space-xl);
  flex-wrap: wrap;
  gap: var(--space-sm);
}

.main-content__title {
  font-size: 22px;
  font-weight: 700;
  display: flex;
  align-items: center;
  gap: var(--space-sm);
}

.breadcrumb-item { color: var(--text-secondary); }
.breadcrumb-sep { margin: 0 4px; color: var(--text-muted); }

.filter-breadcrumb {
  color: var(--color-primary-light);
  font-size: 14px;
  margin-left: 4px;
}

.total-count {
  font-size: 13px;
  color: var(--text-muted);
}

/* ==========================================
   商品卡片网格
   ==========================================*/
.products-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
  gap: var(--space-md);
}

.product-card {
  display: flex;
  flex-direction: column;
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  overflow: hidden;
  transition: all var(--transition-normal);
  cursor: pointer;
}

.product-card:hover {
  transform: translateY(-4px);
  border-color: var(--border-color-hover);
  box-shadow: var(--shadow-md), var(--shadow-glow);
  background: var(--bg-card-hover);
}

.product-card__thumb {
  aspect-ratio: 1;
  background: var(--bg-elevated);
  overflow: hidden;
  position: relative;
}

.product-card__thumb img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform var(--transition-slow);
}

.product-card:hover .product-card__thumb img {
  transform: scale(1.06);
}

.product-card__thumb--error::after {
  content: '⚠';
  display: flex;
  align-items: center;
  justify-content: center;
  width: 100%;
  height: 100%;
  color: var(--text-muted);
  font-size: 24px;
  position: absolute;
  inset: 0;
}

.product-card__no-img {
  display: flex;
  align-items: center;
  justify-content: center;
  height: 100%;
  color: var(--text-muted);
  font-size: 13px;
}

.product-card__count {
  position: absolute;
  bottom: 8px;
  right: 8px;
  background: rgba(0,0,0,0.7);
  backdrop-filter: blur(8px);
  color: var(--text-secondary);
  font-size: 12px;
  padding: 3px 8px;
  border-radius: var(--radius-full);
  display: flex;
  align-items: center;
  gap: 4px;
}

.product-card__info {
  padding: var(--space-sm) var(--space-md) var(--space-md);
  display: flex;
  flex-direction: column;
  gap: 4px;
  flex: 1;
}

.product-card__id {
  font-size: 11px;
  font-weight: 600;
  color: var(--color-primary-light);
  letter-spacing: 0.05em;
  font-family: 'JetBrains Mono', 'Fira Code', monospace;
}

.product-card__name {
  font-size: 13px;
  color: var(--text-primary);
  font-weight: 500;
  line-height: 1.4;
  /* 最多2行 */
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.product-card__tags {
  display: flex;
  flex-wrap: wrap;
  gap: 4px;
  margin-top: 4px;
}

/* ==========================================
   加载/空状态
   ==========================================*/
.loading-spinner {
  display: none;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: var(--space-2xl);
  gap: var(--space-md);
  color: var(--text-muted);
}

.spinner {
  width: 40px;
  height: 40px;
  border: 3px solid var(--border-color);
  border-top-color: var(--color-primary);
  border-radius: 50%;
  animation: spin 0.8s linear infinite;
}

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

.empty-state {
  display: none;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: var(--space-2xl);
  color: var(--text-muted);
  text-align: center;
  gap: var(--space-md);
}

.empty-state__icon { font-size: 48px; opacity: 0.5; }

.error-state {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--space-md);
  padding: var(--space-2xl);
  color: var(--text-muted);
  text-align: center;
  grid-column: 1 / -1;
}

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

.page-btn {
  min-width: 36px;
  height: 36px;
  padding: 0 var(--space-sm);
  border-radius: var(--radius-md);
  font-size: 14px;
  background: var(--bg-elevated);
  color: var(--text-secondary);
  border: 1px solid var(--border-color);
  transition: all var(--transition-fast);
}

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

.page-btn--active {
  background: linear-gradient(135deg, var(--color-primary), var(--color-secondary));
  color: #fff;
  border-color: transparent;
  box-shadow: var(--shadow-glow);
}

.page-btn--disabled,
.page-btn:disabled {
  opacity: 0.4;
  cursor: not-allowed;
}

.page-ellipsis {
  color: var(--text-muted);
  padding: 0 4px;
}

/* ==========================================
   商品详情页 - 瀑布流
   ==========================================*/
.product-header {
  padding: var(--space-xl);
  border-bottom: 1px solid var(--border-color);
  background: var(--bg-surface);
}

.product-breadcrumb {
  font-size: 13px;
  color: var(--text-muted);
  margin-bottom: var(--space-sm);
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 4px;
}

.breadcrumb-back {
  color: var(--color-primary-light);
  transition: color var(--transition-fast);
}
.breadcrumb-back:hover { color: var(--text-primary); }

.product-title-row {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: var(--space-lg);
  flex-wrap: wrap;
}

.product-title-group { flex: 1; }

.product-sku {
  font-family: 'JetBrains Mono', 'Fira Code', monospace;
  font-size: 13px;
  font-weight: 600;
  color: var(--color-primary-light);
  letter-spacing: 0.08em;
  margin-bottom: var(--space-xs);
}

.product-name {
  font-size: 24px;
  font-weight: 700;
  line-height: 1.3;
  margin-bottom: var(--space-sm);
}

.product-meta {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-xs);
  align-items: center;
}

.image-count {
  font-size: 13px;
  color: var(--text-muted);
}

.product-actions {
  display: flex;
  gap: var(--space-sm);
  flex-wrap: wrap;
  align-items: flex-start;
}

/* ——— 瀑布流网格 ——— */
.masonry-grid {
  columns: 3 180px;
  column-gap: var(--space-md);
  padding: var(--space-xl);
}

.masonry-item {
  break-inside: avoid;
  margin-bottom: var(--space-md);
  border-radius: var(--radius-md);
  overflow: hidden;
  background: var(--bg-card);
  cursor: pointer;
  position: relative;
}

.masonry-item__inner { position: relative; }

.masonry-img {
  width: 100%;
  height: auto;
  display: block;
  transition: transform var(--transition-slow);
}

.masonry-item:hover .masonry-img { transform: scale(1.03); }

.masonry-item__overlay {
  position: absolute;
  inset: 0;
  background: rgba(0, 0, 0, 0.4);
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-sm);
  opacity: 0;
  transition: opacity var(--transition-fast);
  backdrop-filter: blur(2px);
}

.masonry-item:hover .masonry-item__overlay { opacity: 1; }

.masonry-zoom-btn,
.masonry-download-btn {
  width: 44px;
  height: 44px;
  border-radius: 50%;
  background: rgba(255,255,255,0.15);
  color: #fff;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  border: 1px solid rgba(255,255,255,0.2);
  transition: all var(--transition-fast);
}
.masonry-zoom-btn:hover { background: var(--color-primary); border-color: var(--color-primary); }
.masonry-download-btn:hover { background: var(--color-success); border-color: var(--color-success); }

.masonry-item__number {
  position: absolute;
  top: 8px;
  left: 8px;
  background: rgba(0,0,0,0.6);
  color: rgba(255,255,255,0.8);
  font-size: 11px;
  font-weight: 600;
  padding: 2px 6px;
  border-radius: var(--radius-sm);
  font-family: monospace;
}

.masonry-item--error::after {
  content: '图片加载失败';
  display: flex;
  align-items: center;
  justify-content: center;
  height: 120px;
  color: var(--text-muted);
  font-size: 13px;
  background: var(--bg-elevated);
}

/* ==========================================
   Lightbox 放大查看
   ==========================================*/
.lightbox {
  display: none;
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.96);
  z-index: 2000;
  flex-direction: column;
  align-items: center;
  justify-content: center;
}

.lightbox--open { display: flex; }

.lightbox__toolbar {
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: var(--space-md) var(--space-xl);
  background: linear-gradient(to bottom, rgba(0,0,0,0.7), transparent);
  z-index: 1;
}

.lightbox__counter {
  color: rgba(255,255,255,0.8);
  font-size: 14px;
  font-weight: 500;
}

.lightbox__close {
  width: 40px;
  height: 40px;
  border-radius: 50%;
  background: rgba(255,255,255,0.1);
  color: #fff;
  font-size: 20px;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  border: 1px solid rgba(255,255,255,0.1);
  transition: background var(--transition-fast);
}
.lightbox__close:hover { background: rgba(255,255,255,0.2); }

.lightbox__img-wrap {
  max-width: 92vw;
  max-height: 88vh;
  display: flex;
  align-items: center;
  justify-content: center;
}

.lightbox__img-wrap img {
  max-width: 100%;
  max-height: 88vh;
  object-fit: contain;
  border-radius: var(--radius-sm);
  box-shadow: var(--shadow-lg);
  transition: opacity var(--transition-fast);
}

.lightbox-img--loading { opacity: 0.3; }

.lightbox__nav {
  position: absolute;
  top: 50%;
  transform: translateY(-50%);
  width: 48px;
  height: 48px;
  border-radius: 50%;
  background: rgba(255,255,255,0.1);
  color: #fff;
  font-size: 24px;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  border: 1px solid rgba(255,255,255,0.15);
  transition: all var(--transition-fast);
}
.lightbox__nav:hover { background: rgba(255,255,255,0.2); }
.lightbox__nav--prev { left: var(--space-lg); }
.lightbox__nav--next { right: var(--space-lg); }
.lightbox__nav:disabled { opacity: 0.2; cursor: not-allowed; }

/* ==========================================
   管理员后台
   ==========================================*/
.admin-layout {
  display: flex;
  min-height: 100vh;
}

.admin-sidebar {
  width: 220px;
  flex-shrink: 0;
  background: var(--bg-surface);
  border-right: 1px solid var(--border-color);
  padding: var(--space-lg) 0;
  display: flex;
  flex-direction: column;
}

.admin-logo {
  padding: 0 var(--space-lg) var(--space-lg);
  font-size: 18px;
  font-weight: 700;
  background: linear-gradient(135deg, var(--color-primary-light), var(--color-accent));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  border-bottom: 1px solid var(--border-color);
  margin-bottom: var(--space-md);
}

.admin-nav { list-style: none; flex: 1; }

.nav-item {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  padding: 10px var(--space-lg);
  color: var(--text-secondary);
  font-size: 14px;
  cursor: pointer;
  transition: all var(--transition-fast);
}
.nav-item:hover { color: var(--text-primary); background: var(--bg-elevated); }
.nav-item--active {
  color: var(--color-primary-light);
  background: rgba(124, 58, 237, 0.1);
  border-right: 2px solid var(--color-primary);
}
.nav-item__icon { font-size: 16px; }

.admin-main {
  flex: 1;
  overflow-y: auto;
  background: var(--bg-base);
}

.admin-topbar {
  height: var(--header-height);
  padding: 0 var(--space-xl);
  display: flex;
  align-items: center;
  justify-content: space-between;
  border-bottom: 1px solid var(--border-color);
  background: var(--bg-surface);
}

.admin-topbar__title {
  font-size: 18px;
  font-weight: 600;
}

.view-panel {
  padding: var(--space-xl);
  display: none;
}

/* 统计卡片 */
.stats-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(160px, 1fr));
  gap: var(--space-md);
  margin-bottom: var(--space-xl);
}

.stat-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: var(--space-lg);
  text-align: center;
}

.stat-card__value {
  font-size: 32px;
  font-weight: 700;
  background: linear-gradient(135deg, var(--color-primary-light), var(--color-accent));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.stat-card__label {
  font-size: 13px;
  color: var(--text-muted);
  margin-top: 4px;
}

/* 数据表格 */
.data-table-wrap {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  overflow: hidden;
}

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

.data-table th {
  text-align: left;
  padding: 12px var(--space-md);
  font-size: 12px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--text-muted);
  border-bottom: 1px solid var(--border-color);
  background: var(--bg-elevated);
}

.data-table td {
  padding: 12px var(--space-md);
  font-size: 13px;
  border-bottom: 1px solid var(--border-color);
  vertical-align: middle;
}

.data-table tr:last-child td { border-bottom: none; }
.data-table tr:hover td { background: var(--bg-elevated); }
.data-table code {
  font-family: monospace;
  font-size: 12px;
  background: rgba(124, 58, 237, 0.15);
  color: var(--color-primary-light);
  padding: 2px 6px;
  border-radius: var(--radius-sm);
}

.td-actions {
  display: flex;
  gap: 4px;
  flex-wrap: wrap;
}

/* 状态徽章 */
.status-badge {
  display: inline-flex;
  padding: 2px 8px;
  border-radius: var(--radius-full);
  font-size: 11px;
  font-weight: 600;
}

.status-badge--active { background: rgba(16, 185, 129, 0.15); color: var(--color-success); }
.status-badge--hidden { background: rgba(245, 158, 11, 0.15); color: var(--color-warning); }
.status-badge--archived { background: rgba(100, 116, 139, 0.15); color: var(--text-muted); }

/* 分类管理 */
.cat-group {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  margin-bottom: var(--space-md);
  overflow: hidden;
}

.cat-group__header {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  padding: var(--space-md);
}

.cat-level1 { background: var(--bg-elevated); }
.cat-level2 { background: var(--bg-surface); padding-left: 32px; }

.cat-group__name { font-weight: 600; }
.cat-group__en { font-size: 12px; color: var(--text-muted); }

.cat-group__actions {
  margin-left: auto;
  display: flex;
  gap: var(--space-xs);
}

.cat-sub-group {
  border-top: 1px solid var(--border-color);
}

.cat-brands {
  padding: var(--space-sm) var(--space-sm) var(--space-sm) 48px;
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-xs);
  border-top: 1px solid var(--border-color);
  background: var(--bg-base);
}

.brand-badge {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  background: var(--bg-elevated);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-full);
  padding: 4px 10px 4px 12px;
  font-size: 12px;
  color: var(--text-secondary);
}

.brand-badge__del {
  color: var(--text-muted);
  font-size: 14px;
  line-height: 1;
  transition: color var(--transition-fast);
}
.brand-badge__del:hover { color: var(--color-danger); }

/* WhatsApp 生成器 */
.wa-generator {
  max-width: 640px;
}

.wa-result {
  display: none;
  margin-top: var(--space-lg);
  background: var(--bg-card);
  border: 1px solid rgba(37, 211, 102, 0.3);
  border-radius: var(--radius-lg);
  padding: var(--space-lg);
}

.wa-link-display {
  background: var(--bg-elevated);
  border-radius: var(--radius-md);
  padding: var(--space-sm) var(--space-md);
  font-size: 13px;
  color: var(--text-secondary);
  word-break: break-all;
  margin: var(--space-sm) 0;
}

/* 登录页面 */
.login-panel {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  background: radial-gradient(ellipse at 50% 0%, rgba(124, 58, 237, 0.15) 0%, transparent 70%);
}

.login-box {
  width: 100%;
  max-width: 400px;
  padding: var(--space-2xl);
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-xl);
  box-shadow: var(--shadow-lg);
}

.login-logo {
  font-size: 28px;
  font-weight: 700;
  text-align: center;
  background: linear-gradient(135deg, var(--color-primary-light), var(--color-accent));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  margin-bottom: var(--space-xs);
}

.login-subtitle {
  text-align: center;
  color: var(--text-muted);
  font-size: 14px;
  margin-bottom: var(--space-xl);
}

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

.form-label {
  display: block;
  font-size: 13px;
  font-weight: 500;
  color: var(--text-secondary);
  margin-bottom: var(--space-xs);
}

/* 表单工具栏 */
.table-toolbar {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  margin-bottom: var(--space-md);
  flex-wrap: wrap;
}

.add-cat1-section {
  padding: var(--space-md);
  border-top: 1px solid var(--border-color);
}

/* ==========================================
   响应式适配（移动端）
   ==========================================*/
@media (max-width: 768px) {
  :root { --sidebar-width: 100%; }

  .header__mobile-toggle { display: flex; }
  .header__search-wrap { max-width: none; }

  .sidebar {
    position: fixed;
    left: -100%;
    top: var(--header-height);
    width: 280px;
    height: calc(100vh - var(--header-height));
    z-index: 200;
    transition: left var(--transition-normal);
    box-shadow: var(--shadow-lg);
  }

  .sidebar--open { left: 0; }

  .main-content { padding: var(--space-md); }

  .products-grid {
    grid-template-columns: repeat(auto-fill, minmax(150px, 1fr));
    gap: var(--space-sm);
  }

  .masonry-grid {
    columns: 2 140px;
    padding: var(--space-md);
  }

  .product-title-row { flex-direction: column; }
  .product-name { font-size: 20px; }

  .lightbox__nav { display: none; }

  .admin-sidebar { display: none; }
  .admin-layout { flex-direction: column; }

  .data-table { font-size: 12px; }
  .td-actions { flex-direction: column; gap: 2px; }
}

@media (max-width: 480px) {
  .products-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: var(--space-xs);
  }

  .masonry-grid { columns: 2; column-gap: var(--space-sm); }
}

/* ==========================================
   添加商品三步向导
   ==========================================*/

/* 步骤指示器 */
.wizard-step {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 4px;
  flex: 0 0 auto;
  opacity: 0.4;
  transition: opacity var(--transition-fast);
}
.wizard-step--active,
.wizard-step--done { opacity: 1; }

.wizard-step__num {
  width: 32px;
  height: 32px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  font-size: 14px;
  background: var(--bg-elevated);
  border: 2px solid var(--border-color);
  transition: all var(--transition-fast);
}
.wizard-step--active .wizard-step__num {
  background: var(--color-primary);
  border-color: var(--color-primary);
  color: #fff;
  box-shadow: 0 0 12px rgba(124, 58, 237, 0.5);
}
.wizard-step--done .wizard-step__num {
  background: var(--color-success);
  border-color: var(--color-success);
  color: #fff;
}
.wizard-step--done .wizard-step__num::before { content: '✓'; }

.wizard-step__label {
  font-size: 12px;
  color: var(--text-muted);
  white-space: nowrap;
}
.wizard-step--active .wizard-step__label { color: var(--color-primary-light); font-weight: 600; }
.wizard-step--done .wizard-step__label  { color: var(--color-success); }

.wizard-step__line {
  flex: 1;
  height: 2px;
  background: var(--border-color);
  margin: 0 8px;
  margin-bottom: 20px; /* 与 label 对齐 */
  transition: background var(--transition-fast);
}

/* ==========================================
   拖拽上传区
   ==========================================*/
.upload-dropzone {
  border: 2px dashed var(--border-color);
  border-radius: var(--radius-lg);
  padding: var(--space-2xl) var(--space-xl);
  text-align: center;
  cursor: pointer;
  transition: all var(--transition-fast);
  background: var(--bg-elevated);
  margin-bottom: var(--space-md);
  user-select: none;
}
.upload-dropzone:hover,
.upload-dropzone--drag {
  border-color: var(--color-primary);
  background: rgba(124, 58, 237, 0.06);
}
.upload-dropzone__icon { font-size: 40px; margin-bottom: 8px; }
.upload-dropzone__text {
  font-size: 15px;
  font-weight: 500;
  color: var(--text-secondary);
  margin-bottom: 4px;
}
.upload-dropzone__hint { font-size: 13px; color: var(--text-muted); }

/* ==========================================
   图片预览网格
   ==========================================*/
.upload-preview-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(110px, 1fr));
  gap: var(--space-sm);
  margin-bottom: var(--space-sm);
  max-height: 300px;
  overflow-y: auto;
}

.upload-preview-item {
  position: relative;
  border-radius: var(--radius-md);
  overflow: hidden;
  background: var(--bg-elevated);
  border: 1px solid var(--border-color);
  transition: all var(--transition-fast);
}
.upload-preview-item--done {
  border-color: var(--color-success);
  box-shadow: 0 0 8px rgba(16, 185, 129, 0.3);
}

.upload-preview-img {
  width: 100%;
  aspect-ratio: 1;
  object-fit: cover;
  display: block;
}

.upload-preview-name {
  padding: 4px 6px;
  font-size: 10px;
  color: var(--text-muted);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.upload-preview-status {
  position: absolute;
  top: 6px;
  left: 6px;
  font-size: 16px;
  line-height: 1;
  text-shadow: 0 1px 3px rgba(0,0,0,0.5);
}

.upload-preview-del {
  position: absolute;
  top: 4px;
  right: 4px;
  width: 20px;
  height: 20px;
  border-radius: 50%;
  background: rgba(0,0,0,0.6);
  color: #fff;
  font-size: 11px;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  border: none;
  opacity: 0;
  transition: opacity var(--transition-fast);
  z-index: 1;
}
.upload-preview-item:hover .upload-preview-del { opacity: 1; }


/* ==========================================
   ��RbchV
   ========================================== */
.lang-switcher {
  background: var(--bg-glass);
  color: var(--text-primary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-sm);
  padding: 4px 8px;
  font-size: 13px;
  outline: none;
  cursor: pointer;
  transition: all var(--transition-fast);
}
.lang-switcher:hover {
  border-color: var(--border-color-hover);
}
.lang-switcher:focus {
  border-color: var(--color-primary);
  box-shadow: 0 0 0 2px rgba(124, 58, 237, 0.2);
}