/**
 * Product Page Styles - Tongyu Technology Website
 *
 * Styles for product listing pages with sidebar navigation.
 */

@import '../variables.css';

/* ==========================================================================
   Product Layout - 产品页面布局
   ========================================================================== */

.product-page {
  padding-top: var(--header-height);
  min-height: 100vh;
  background-color: var(--color-gray-light);
}

/* Breadcrumb */
.breadcrumb {
  background-color: var(--color-bg-primary);
  padding: var(--space-4) 0;
  border-bottom: 1px solid var(--color-gray-border);
}

.breadcrumb-container {
  max-width: var(--container-max-xl);
  margin: 0 auto;
  padding: 0 var(--space-6);
}

.breadcrumb-list {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  list-style: none;
  margin: 0;
  padding: 0;
}

.breadcrumb-item {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  font-size: var(--font-size-sm);
  color: var(--color-text-tertiary);
}

.breadcrumb-item a {
  color: var(--color-text-tertiary);
  text-decoration: none;
  transition: color var(--transition-fast);
}

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

.breadcrumb-item::after {
  content: '/';
  color: var(--color-text-light);
}

.breadcrumb-item:last-child::after {
  content: '';
}

.breadcrumb-item:last-child {
  color: var(--color-text-secondary);
}

/* ==========================================================================
   Product Main Layout
   ========================================================================== */

.product-layout {
  display: grid;
  grid-template-columns: 280px 1fr;
  gap: var(--space-8);
  max-width: var(--container-max-xl);
  margin: 0 auto;
  padding: var(--space-8) var(--space-6);
}

/* ==========================================================================
   Sidebar Navigation - 侧边栏导航
   ========================================================================== */

.product-sidebar {
  position: sticky;
  top: calc(var(--header-height) + var(--space-8));
  height: fit-content;
}

.sidebar-section {
  background: var(--color-bg-primary);
  border-radius: var(--radius-lg);
  padding: var(--space-6);
  box-shadow: var(--card-shadow);
}

.sidebar-title {
  font-size: var(--font-size-lg);
  font-weight: var(--font-weight-semibold);
  color: var(--color-text-primary);
  margin-bottom: var(--space-6);
  padding-bottom: var(--space-4);
  border-bottom: 2px solid var(--color-primary);
}

.sidebar-nav {
  list-style: none;
  margin: 0;
  padding: 0;
}

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

.sidebar-nav-link {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  padding: var(--space-3) var(--space-4);
  font-size: var(--font-size-sm);
  color: var(--color-text-secondary);
  text-decoration: none;
  border-radius: var(--radius-base);
  transition: all var(--transition-fast);
}

.sidebar-nav-link:hover,
.sidebar-nav-link.active {
  background-color: var(--color-primary-light);
  color: var(--color-primary);
}

.sidebar-nav-link.active {
  font-weight: var(--font-weight-medium);
  background-color: var(--color-primary-light);
}

.sidebar-nav-link svg {
  width: 18px;
  height: 18px;
  flex-shrink: 0;
}

/* Sub-category styling */
.sidebar-nav-sub {
  list-style: none;
  margin: 0;
  padding: 0 0 0 var(--space-6);
}

.sidebar-nav-sub-item {
  margin-bottom: var(--space-1);
}

.sidebar-nav-sub-link {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  padding: var(--space-2) var(--space-3);
  font-size: var(--font-size-xs);
  color: var(--color-text-tertiary);
  text-decoration: none;
  border-radius: var(--radius-sm);
  transition: all var(--transition-fast);
}

.sidebar-nav-sub-link:hover,
.sidebar-nav-sub-link.active {
  color: var(--color-primary);
  background-color: var(--color-primary-light);
}

.sidebar-nav-sub-link.active {
  font-weight: var(--font-weight-medium);
}

/* ==========================================================================
   Product Content Area - 产品内容区
   ========================================================================== */

.product-content {
  min-width: 0;
}

/* Product Header */
.product-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: var(--space-6);
  flex-wrap: wrap;
  gap: var(--space-4);
}

.product-title-wrap {
  flex: 1;
  min-width: 200px;
}

.product-title {
  font-family: var(--font-family-heading);
  font-size: var(--font-size-2xl);
  font-weight: var(--font-weight-bold);
  color: var(--color-text-primary);
  margin-bottom: var(--space-2);
}

.product-subtitle {
  font-size: var(--font-size-base);
  color: var(--color-text-tertiary);
}

/* Filter Bar */
.filter-bar {
  display: flex;
  align-items: center;
  gap: var(--space-4);
  flex-wrap: wrap;
}

.filter-group {
  display: flex;
  align-items: center;
  gap: var(--space-2);
}

.filter-label {
  font-size: var(--font-size-sm);
  color: var(--color-text-tertiary);
}

.filter-select {
  height: var(--input-height-sm);
  padding: var(--space-2) var(--space-4);
  padding-right: var(--space-8);
  border: 1px solid var(--color-gray-border);
  border-radius: var(--radius-base);
  font-size: var(--font-size-sm);
  color: var(--color-text-secondary);
  background-color: var(--color-bg-primary);
  cursor: pointer;
  transition: border-color var(--transition-fast);
  appearance: none;
  background-image: url('data:image/svg+xml,<svg xmlns="http://www.w3.org/2000/svg" width="12" height="12" viewBox="0 0 12 12"><path fill="%23666" d="M6 8L1 3h10z"/></svg>');
  background-repeat: no-repeat;
  background-position: right 12px center;
}

.filter-select:focus {
  outline: none;
  border-color: var(--color-primary);
}

.filter-select:hover {
  border-color: var(--color-primary);
}

/* Search Box in Filter */
.filter-search {
  display: flex;
  align-items: center;
  gap: 0;
  height: var(--input-height-sm);
  border: 1px solid var(--color-gray-border);
  border-radius: var(--radius-base);
  overflow: hidden;
  background-color: var(--color-bg-primary);
}

.filter-search-input {
  flex: 1;
  height: 100%;
  padding: var(--space-2) var(--space-4);
  border: none;
  font-size: var(--font-size-sm);
  color: var(--color-text-secondary);
  background: transparent;
  min-width: 180px;
}

.filter-search-input:focus {
  outline: none;
}

.filter-search-input::placeholder {
  color: var(--color-text-light);
}

.filter-search-btn {
  display: flex;
  align-items: center;
  justify-content: center;
  height: 100%;
  padding: 0 var(--space-4);
  background: var(--color-primary);
  border: none;
  color: var(--color-text-inverse);
  cursor: pointer;
  transition: background var(--transition-fast);
}

.filter-search-btn:hover {
  background: var(--color-primary-hover);
}

.filter-search-btn svg {
  width: 16px;
  height: 16px;
}

/* ==========================================================================
   Product Grid - 产品网格
   ========================================================================== */

.product-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-6);
}

/* Product Card */
.product-card {
  background: var(--color-bg-primary);
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--card-shadow);
  transition: all var(--transition-base);
  cursor: pointer;
}

.product-card:hover {
  box-shadow: var(--card-hover-shadow);
  transform: translateY(-4px);
}

.product-card-image {
  position: relative;
  width: 100%;
  height: 220px;
  overflow: hidden;
  background: var(--color-gray-light);
}

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

.product-card:hover .product-card-image img {
  transform: scale(1.05);
}

.product-card-badge {
  position: absolute;
  top: var(--space-3);
  right: var(--space-3);
  padding: var(--space-1) var(--space-3);
  background: var(--color-primary);
  color: var(--color-text-inverse);
  font-size: var(--font-size-xs);
  font-weight: var(--font-weight-medium);
  border-radius: var(--radius-full);
}

.product-card-content {
  padding: var(--space-5);
}

.product-card-title {
  font-size: var(--font-size-md);
  font-weight: var(--font-weight-semibold);
  color: var(--color-text-primary);
  margin-bottom: var(--space-2);
  line-height: var(--line-height-tight);
}

.product-card-title a {
  color: inherit;
  text-decoration: none;
  transition: color var(--transition-fast);
}

.product-card-title a:hover {
  color: var(--color-primary);
}

.product-card-meta {
  display: flex;
  align-items: center;
  gap: var(--space-4);
  margin-bottom: var(--space-3);
}

.product-card-category {
  font-size: var(--font-size-xs);
  color: var(--color-text-light);
  text-transform: uppercase;
  letter-spacing: var(--letter-spacing-wide);
}

.product-card-desc {
  font-size: var(--font-size-sm);
  color: var(--color-text-tertiary);
  line-height: var(--line-height-normal);
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
  margin-bottom: var(--space-4);
}

.product-card-footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-top: var(--space-4);
  border-top: 1px solid var(--color-gray-border);
}

.product-card-spec {
  font-size: var(--font-size-xs);
  color: var(--color-text-light);
}

.product-card-link {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  font-size: var(--font-size-sm);
  font-weight: var(--font-weight-medium);
  color: var(--color-primary);
  text-decoration: none;
  transition: gap var(--transition-fast);
}

.product-card-link:hover {
  gap: var(--space-3);
}

.product-card-link svg {
  width: 16px;
  height: 16px;
}

/* ==========================================================================
   Product Overview Categories - 产品分类总览
   ========================================================================== */

.product-categories {
  padding: var(--space-16) 0;
  background: var(--color-bg-primary);
}

.product-categories .container {
  max-width: var(--container-max-xl);
  margin: 0 auto;
  padding: 0 var(--space-6);
}

.category-header {
  text-align: center;
  margin-bottom: var(--space-12);
}

.category-title {
  font-family: var(--font-family-heading);
  font-size: var(--font-size-3xl);
  font-weight: var(--font-weight-bold);
  color: var(--color-text-primary);
  margin-bottom: var(--space-4);
}

.category-subtitle {
  font-size: var(--font-size-lg);
  color: var(--color-text-tertiary);
  max-width: 600px;
  margin: 0 auto;
}

.category-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: var(--space-8);
}

.category-card {
  position: relative;
  background: var(--color-gray-light);
  border-radius: var(--radius-lg);
  overflow: hidden;
  transition: all var(--transition-base);
  cursor: pointer;
  min-height: 320px;
}

.category-card:hover {
  transform: translateY(-8px);
  box-shadow: var(--card-hover-shadow);
}

.category-card-image {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background-size: cover;
  background-position: center;
  background-repeat: no-repeat;
  transition: transform var(--transition-slow);
}

.category-card:hover .category-card-image {
  transform: scale(1.08);
}

.category-card-overlay {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: linear-gradient(
    to bottom,
    rgba(0, 0, 0, 0.1) 0%,
    rgba(0, 0, 0, 0.6) 100%
  );
  transition: background var(--transition-base);
}

.category-card:hover .category-card-overlay {
  background: linear-gradient(
    to bottom,
    rgba(0, 0, 0, 0.2) 0%,
    rgba(0, 0, 0, 0.75) 100%
  );
}

.category-card-content {
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  padding: var(--space-6);
  z-index: 2;
  display: flex;
  flex-direction: column;
}

.category-card-icon {
  width: 48px;
  height: 48px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: rgba(255, 255, 255, 0.15);
  backdrop-filter: blur(8px);
  border-radius: var(--radius-full);
  margin-bottom: var(--space-4);
  transition: all var(--transition-base);
}

.category-card:hover .category-card-icon {
  background: var(--color-primary);
}

.category-card-icon svg {
  width: 24px;
  height: 24px;
  color: var(--color-text-inverse);
}

.category-card-title {
  font-size: var(--font-size-lg);
  font-weight: var(--font-weight-semibold);
  color: var(--color-text-inverse);
  margin-bottom: var(--space-2);
}

.category-card-desc {
  font-size: var(--font-size-sm);
  color: rgba(255, 255, 255, 0.85);
  line-height: var(--line-height-normal);
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
  margin-bottom: var(--space-4);
  opacity: 0;
  transform: translateY(10px);
  transition: all var(--transition-base);
}

.category-card:hover .category-card-desc {
  opacity: 1;
  transform: translateY(0);
}

.category-card-link {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  padding: var(--space-2) var(--space-4);
  background: rgba(255, 255, 255, 0.15);
  backdrop-filter: blur(8px);
  border: 1px solid rgba(255, 255, 255, 0.3);
  border-radius: var(--radius-base);
  color: var(--color-text-inverse);
  font-size: var(--font-size-sm);
  font-weight: var(--font-weight-medium);
  text-decoration: none;
  opacity: 0;
  transform: translateY(10px);
  transition: all var(--transition-base);
}

.category-card:hover .category-card-link {
  opacity: 1;
  transform: translateY(0);
}

.category-card-link:hover {
  background: rgba(255, 255, 255, 0.25);
  border-color: rgba(255, 255, 255, 0.5);
}

.category-card-link svg {
  width: 16px;
  height: 16px;
  transition: transform var(--transition-fast);
}

.category-card-link:hover svg {
  transform: translateX(4px);
}

/* Category backgrounds */
.category-card.energy .category-card-image {
  background-image: url('data:image/svg+xml,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 400 320"><rect fill="%23002B5B" width="400" height="320"/><circle cx="200" cy="100" r="80" fill="%23FFD700" opacity="0.4"/><line x1="200" y1="180" x2="200" y2="280" stroke="%23FFD700" stroke-width="4" opacity="0.4"/></svg>');
}

.category-card.automotive .category-card-image {
  background-image: url('data:image/svg+xml,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 400 320"><rect fill="%231b2838" width="400" height="320"/><path d="M100 220 L200 140 L300 220 Z" fill="%23017bdd" opacity="0.4"/><circle cx="150" cy="240" r="30" fill="%23017bdd" opacity="0.3"/><circle cx="250" cy="240" r="30" fill="%23017bdd" opacity="0.3"/></svg>');
}

.category-card.pc-server .category-card-image {
  background-image: url('data:image/svg+xml,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 400 320"><rect fill="%230d1b2a" width="400" height="320"/><rect x="120" y="80" width="160" height="160" rx="8" fill="%23017bdd" opacity="0.4"/><rect x="160" y="250" width="80" height="15" fill="%23017bdd" opacity="0.3"/></svg>');
}

.category-card.networking .category-card-image {
  background-image: url('data:image/svg+xml,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 400 320"><rect fill="%231a1a2e" width="400" height="320"/><circle cx="200" cy="160" r="100" fill="%23017bdd" opacity="0.3"/><circle cx="120" cy="100" r="50" fill="%23017bdd" opacity="0.2"/><circle cx="280" cy="220" r="60" fill="%23017bdd" opacity="0.2"/></svg>');
}

/* ==========================================================================
   Responsive Styles - 响应式样式
   ========================================================================== */

@media (max-width: 1199px) {
  .product-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .category-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 991px) {
  .product-layout {
    grid-template-columns: 1fr;
  }

  .product-sidebar {
    position: static;
  }

  .sidebar-section {
    margin-bottom: var(--space-4);
  }

  .product-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 767px) {
  .product-categories {
    padding: var(--space-10) 0;
  }

  .category-grid {
    grid-template-columns: 1fr;
    gap: var(--space-4);
  }

  .category-card {
    min-height: 280px;
  }

  .category-card-desc {
    opacity: 1;
    transform: translateY(0);
  }

  .category-card-link {
    opacity: 1;
    transform: translateY(0);
  }

  .product-grid {
    grid-template-columns: 1fr;
  }

  .product-header {
    flex-direction: column;
    align-items: flex-start;
  }

  .filter-bar {
    width: 100%;
  }

  .filter-search {
    width: 100%;
  }

  .filter-search-input {
    width: 100%;
  }
}

@media (max-width: 575px) {
  .product-layout {
    padding: var(--space-4);
    gap: var(--space-4);
  }

  .product-title {
    font-size: var(--font-size-xl);
  }

  .category-card {
    min-height: 240px;
  }
}

/* ==========================================================================
   Animation - 动画效果
   ========================================================================== */

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

.product-card {
  animation: fadeInUp 0.4s ease forwards;
}

.product-card:nth-child(1) { animation-delay: 0.05s; }
.product-card:nth-child(2) { animation-delay: 0.1s; }
.product-card:nth-child(3) { animation-delay: 0.15s; }
.product-card:nth-child(4) { animation-delay: 0.2s; }
.product-card:nth-child(5) { animation-delay: 0.25s; }
.product-card:nth-child(6) { animation-delay: 0.3s; }

.category-card {
  animation: fadeInUp 0.4s ease forwards;
}

.category-card:nth-child(1) { animation-delay: 0.1s; }
.category-card:nth-child(2) { animation-delay: 0.15s; }
.category-card:nth-child(3) { animation-delay: 0.2s; }
.category-card:nth-child(4) { animation-delay: 0.25s; }

@media (prefers-reduced-motion: reduce) {
  .product-card,
  .category-card {
    animation: none;
  }

  .product-card:hover,
  .category-card:hover {
    transform: none;
  }

  .product-card-image img,
  .category-card-image {
    transition: none;
  }
}