/* ============================================
   Mining Machinery - Inner Pages
   ============================================ */

/* --- Page Hero --- */
.page-hero {
  padding: 160px 0 80px;
  background: var(--bg-primary);
  border-bottom: 1px solid var(--border);
  position: relative;
}

.page-hero::after {
  content: '';
  position: absolute;
  bottom: 0; left: 0; right: 0;
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--accent), transparent);
  opacity: 0.3;
}

.breadcrumb {
  font-size: 13px;
  color: var(--text-secondary);
  margin-bottom: 20px;
}

.breadcrumb a { color: var(--accent); transition: color var(--transition); }
.breadcrumb a:hover { color: var(--accent-hover); }
.breadcrumb span { color: var(--text-secondary); }

.page-hero h1 {
  font-size: 48px;
  font-weight: 800;
  line-height: 1.15;
  margin-bottom: 16px;
}

.page-hero p {
  font-size: 16px;
  color: var(--text-secondary);
  max-width: 600px;
  line-height: 1.7;
}

/* --- Page Layout (Sidebar) --- */
.page-layout {
  display: grid;
  grid-template-columns: 280px 1fr;
  gap: 48px;
  align-items: start;
}

/* --- Sidebar --- */
.sidebar {
  position: sticky;
  top: 100px;
}

.sidebar-block {
  background: var(--bg-secondary);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 24px;
  margin-bottom: 20px;
}

.sidebar-block h4 {
  font-size: 14px;
  font-weight: 700;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  margin-bottom: 16px;
}

.sidebar-nav a {
  display: block;
  font-size: 14px;
  color: var(--text-secondary);
  padding: 10px 0;
  border-bottom: 1px solid var(--border);
  transition: color var(--transition);
}

.sidebar-nav a:last-child { border-bottom: none; }
.sidebar-nav a:hover { color: var(--text-primary); }
.sidebar-nav a.active { color: var(--accent); font-weight: 600; }

/* Sidebar contact */
.sidebar-contact p {
  font-size: 13px;
  color: var(--text-secondary);
  margin-bottom: 8px;
  line-height: 1.6;
}

.sidebar-contact strong {
  color: var(--text-primary);
  font-weight: 600;
}

/* --- Product Detail --- */
.product-detail-hero {
  padding: 160px 0 60px;
  background: var(--bg-primary);
}

.product-gallery {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 24px;
  margin-bottom: 48px;
}

.product-gallery-main {
  aspect-ratio: 4/3;
  background: var(--bg-secondary);
  border-radius: 8px;
  overflow: hidden;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 80px;
  color: var(--border);
}

.product-gallery-thumbs {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 12px;
}

.product-gallery-thumb {
  aspect-ratio: 4/3;
  background: var(--bg-secondary);
  border-radius: 6px;
  border: 1px solid var(--border);
  transition: border-color var(--transition);
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 32px;
  color: var(--border);
}

.product-gallery-thumb:hover { border-color: var(--accent); }

/* Product info */
.product-header {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  gap: 24px;
  margin-bottom: 36px;
  flex-wrap: wrap;
}

.product-header h1 {
  font-size: 36px;
  font-weight: 800;
  line-height: 1.2;
}

.product-header-cta {
  display: flex;
  gap: 12px;
  flex-shrink: 0;
}

/* Tabs */
.product-tabs {
  display: flex;
  gap: 0;
  border-bottom: 1px solid var(--border);
  margin-bottom: 36px;
  overflow-x: auto;
}

.product-tab {
  font-size: 14px;
  font-weight: 600;
  color: var(--text-secondary);
  padding: 14px 24px;
  background: none;
  border: none;
  cursor: pointer;
  border-bottom: 2px solid transparent;
  transition: all var(--transition);
  white-space: nowrap;
  font-family: var(--font);
}

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

/* Specs table */
.specs-table {
  width: 100%;
  border-collapse: collapse;
  margin-bottom: 40px;
}

.specs-table th,
.specs-table td {
  padding: 14px 20px;
  text-align: left;
  border-bottom: 1px solid var(--border);
}

.specs-table th {
  font-size: 13px;
  font-weight: 600;
  color: var(--text-secondary);
  letter-spacing: 0.04em;
  text-transform: uppercase;
  background: var(--bg-tertiary);
  width: 200px;
}

.specs-table td {
  font-size: 15px;
}

/* Feature list */
.feature-list {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 20px;
  margin-bottom: 40px;
}

.feature-item {
  display: flex;
  gap: 14px;
  padding: 20px;
  background: var(--bg-secondary);
  border: 1px solid var(--border);
  border-radius: 8px;
}

.feature-item-icon {
  font-size: 24px;
  flex-shrink: 0;
  width: 44px; height: 44px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: rgba(245,166,35,0.1);
  border-radius: 6px;
  color: var(--accent);
}

.feature-item-icon::before {
  content: '';
  display: block;
  width: 10px;
  height: 10px;
  background: var(--accent);
  transform: rotate(45deg);
  border-radius: 2px;
}

.feature-item-content h4 {
  font-size: 15px;
  font-weight: 700;
  margin-bottom: 6px;
}

.feature-item-content p {
  font-size: 13px;
  color: var(--text-secondary);
  line-height: 1.6;
}

/* --- Case detail --- */
.case-header-meta {
  display: flex;
  gap: 32px;
  flex-wrap: wrap;
  margin-top: 20px;
}

.case-meta-item {
  font-size: 13px;
  color: var(--text-secondary);
}

.case-meta-item strong {
  display: block;
  font-size: 16px;
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: 4px;
}

.case-meta-item .accent { color: var(--accent); }

/* --- About --- */
.about-stats-banner {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 40px;
  padding: 60px 0;
  text-align: center;
}

.about-stat-number {
  font-size: 42px;
  font-weight: 800;
  color: var(--accent);
  line-height: 1;
  margin-bottom: 8px;
}

.about-stat-label {
  font-size: 13px;
  color: var(--text-secondary);
  letter-spacing: 0.04em;
}

.timeline {
  position: relative;
  padding-left: 32px;
  border-left: 2px solid var(--border);
}

.timeline-item {
  position: relative;
  margin-bottom: 40px;
  padding-left: 32px;
}

.timeline-item::before {
  content: '';
  position: absolute;
  left: -39px;
  top: 6px;
  width: 12px; height: 12px;
  background: var(--accent);
  border-radius: 50%;
  border: 3px solid var(--bg-primary);
}

.timeline-year {
  font-size: 14px;
  font-weight: 700;
  color: var(--accent);
  margin-bottom: 8px;
}

.timeline-content h4 {
  font-size: 17px;
  font-weight: 700;
  margin-bottom: 8px;
}

.timeline-content p {
  font-size: 14px;
  color: var(--text-secondary);
  line-height: 1.7;
}

/* --- News --- */
.news-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.news-card {
  background: var(--bg-secondary);
  border: 1px solid var(--border);
  border-radius: 8px;
  overflow: hidden;
  transition: all var(--transition);
}

.news-card:hover {
  border-color: var(--accent);
  transform: translateY(-4px);
}

.news-card-img {
  width: 100%;
  aspect-ratio: 16/10;
  background: linear-gradient(135deg, #1A1A2E 0%, #16213E 100%);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 40px;
  color: var(--border);
}

.news-card-img::before {
  content: '';
  display: block;
  width: 20px;
  height: 20px;
  background: var(--accent);
  transform: rotate(45deg);
  border-radius: 3px;
  opacity: 0.6;
}

.news-card-body { padding: 24px; }

.news-card-date {
  font-size: 12px;
  color: var(--accent);
  font-weight: 600;
  letter-spacing: 0.06em;
  margin-bottom: 10px;
}

.news-card h3 {
  font-size: 18px;
  font-weight: 700;
  margin-bottom: 10px;
  line-height: 1.4;
}

.news-card p {
  font-size: 14px;
  color: var(--text-secondary);
  line-height: 1.6;
}

/* --- Contact page --- */
.contact-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 48px;
}

.contact-info-card {
  background: var(--bg-secondary);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 32px;
  margin-bottom: 20px;
  transition: border-color var(--transition);
}

.contact-info-card:hover { border-color: var(--accent); }

.contact-info-card .icon {
  font-size: 24px;
  color: var(--accent);
  margin-bottom: 12px;
}

.contact-info-card h4 {
  font-size: 16px;
  font-weight: 700;
  margin-bottom: 8px;
}

.contact-info-card p {
  font-size: 14px;
  color: var(--text-secondary);
  line-height: 1.6;
}

/* --- Certification cards --- */
.cert-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
}

.cert-card {
  background: var(--bg-secondary);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 32px 24px;
  text-align: center;
  transition: all var(--transition);
}

.cert-card:hover { border-color: var(--accent); }

.cert-icon {
  font-size: 48px;
  margin-bottom: 16px;
  width: 80px; height: 80px;
  display: flex;
  align-items: center;
  justify-content: center;
  margin-left: auto; margin-right: auto;
  background: rgba(245,166,35,0.08);
  border-radius: 8px;
}

.cert-icon::before {
  content: '';
  display: block;
  width: 18px;
  height: 18px;
  background: var(--accent);
  transform: rotate(45deg);
  border-radius: 3px;
}

.cert-card h4 {
  font-size: 15px;
  font-weight: 700;
  margin-bottom: 8px;
}

.cert-card p {
  font-size: 13px;
  color: var(--text-secondary);
}

/* Image placeholder */
.img-placeholder {
  width: 100%;
  background: var(--bg-tertiary);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--border);
  font-size: 48px;
  border-radius: 8px;
  flex-direction: column;
  gap: 12px;
}

.img-placeholder::before {
  content: '';
  display: block;
  width: 24px;
  height: 24px;
  background: var(--accent);
  transform: rotate(45deg);
  border-radius: 4px;
  opacity: 0.5;
}

/* Tab panels */
.tab-panel { display: none; }
.tab-panel.active { display: block; }

/* --- Responsive --- */
@media (max-width: 1024px) {
  .page-layout { grid-template-columns: 1fr; }
  .sidebar { position: static; }
  .product-gallery { grid-template-columns: 1fr; }
  .contact-grid { grid-template-columns: 1fr; }
  .cert-grid { grid-template-columns: repeat(2, 1fr); }
  .about-stats-banner { grid-template-columns: repeat(2, 1fr); }
  .news-grid { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 768px) {
  .page-hero { padding: 140px 0 60px; }
  .page-hero h1 { font-size: 32px; }
  .feature-list { grid-template-columns: 1fr; }
  .product-header { flex-direction: column; }
  .cert-grid { grid-template-columns: 1fr; }
  .about-stats-banner { grid-template-columns: repeat(2, 1fr); gap: 24px; }
  .news-grid { grid-template-columns: 1fr; }
  .case-header-meta { gap: 16px; }
}