.service-nav {
  position: sticky;
  top: 80px;
  z-index: 20;
  background: rgba(255,255,255,0.96);
  border-bottom: 1px solid var(--color-border-light);
  backdrop-filter: blur(10px);
}

.service-nav .container {
  display: flex;
  gap: var(--space-2);
  overflow-x: auto;
  padding: 14px 0;
}

.service-nav a,
.filter-tag {
  white-space: nowrap;
  border: 1px solid var(--color-border);
  background: var(--color-bg-primary);
  color: var(--color-text-secondary);
  border-radius: var(--radius-full);
  padding: 9px 16px;
  font-size: var(--text-sm);
  transition: all 0.3s ease;
}

.service-nav a:hover,
.filter-tag:hover,
.filter-tag.active {
  border-color: var(--color-accent);
  background: var(--color-accent-10);
  color: var(--color-accent-dark);
}

.service-section {
  display: grid;
  grid-template-columns: 0.9fr 1.1fr;
  gap: var(--space-12);
  align-items: center;
  padding: var(--space-20) 0;
  border-bottom: 1px solid var(--color-border-light);
  scroll-margin-top: 150px;
}

.service-section:nth-child(even) .image-frame {
  order: 2;
}

.service-section .image-frame {
  aspect-ratio: 800 / 520;
}

.service-section h2 {
  margin: var(--space-4) 0;
  font-size: var(--text-3xl);
}

.detail-layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 340px;
  gap: var(--space-12);
  align-items: start;
}

.detail-aside {
  position: sticky;
  top: 112px;
  display: grid;
  gap: var(--space-4);
  padding: var(--space-6);
  background: var(--color-bg-secondary);
  border: 1px solid var(--color-border-light);
  border-radius: var(--radius-md);
}

.detail-content {
  display: grid;
  gap: var(--space-10);
}