.page-products {
  --chapter-number-size: 5rem;
  --chapter-gap: 3rem;
  --chapter-padding: 2rem;
  --card-bg: rgba(255, 255, 255, 0.03);
  --card-radius: 12px;
  --card-shadow: 0 8px 32px rgba(0, 0, 0, 0.3);
  --accent-gradient: linear-gradient(135deg, var(--primary-red), var(--accent-orange));
  --stats-bar-width: 100%;
  width: 100%;
  max-width: var(--content-max);
  margin: 0 auto;
  padding: 1.5rem 1rem 3rem;
  color: var(--text-primary);
  font-family: var(--font-body);
  background: var(--dark-bg);
  min-height: 100vh;
  box-sizing: border-box;
}
.page-products .breadcrumb {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-size: 0.875rem;
  color: var(--text-secondary);
  margin-bottom: 1.5rem;
  flex-wrap: wrap;
}
.page-products .breadcrumb a {
  color: var(--text-secondary);
  text-decoration: none;
  transition: color 0.2s;
  font-weight: 500;
}
.page-products .breadcrumb a:hover,
.page-products .breadcrumb a:focus-visible {
  color: var(--primary-red);
}
.page-products .breadcrumb .sep {
  color: var(--primary-red);
  font-weight: 700;
  user-select: none;
}
.page-products .page-header {
  margin-bottom: 2.5rem;
}
.page-products .page-header h1 {
  font-family: var(--font-heading);
  font-size: 2.2rem;
  font-weight: 800;
  font-style: italic;
  letter-spacing: -0.02em;
  margin: 0 0 0.75rem;
  background: var(--accent-gradient);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  line-height: 1.1;
}
.page-products .page-subtitle {
  font-size: 1rem;
  color: var(--text-secondary);
  max-width: 680px;
  line-height: 1.6;
  margin: 0;
}
.page-products .chapters {
  display: flex;
  flex-direction: column;
  gap: var(--chapter-gap);
}
.page-products .chapter {
  display: flex;
  flex-direction: column;
  gap: 1rem;
  background: var(--card-bg);
  border-radius: var(--card-radius);
  box-shadow: var(--card-shadow);
  padding: var(--chapter-padding);
  border: 1px solid var(--border-subtle);
  transition: border-color 0.3s, box-shadow 0.3s;
  position: relative;
}
.page-products .chapter:hover {
  border-color: rgba(230, 57, 70, 0.25);
  box-shadow: 0 8px 40px rgba(230, 57, 70, 0.08);
}
.page-products .chapter-number {
  font-family: var(--font-heading);
  font-size: var(--chapter-number-size);
  font-weight: 900;
  line-height: 1;
  color: var(--primary-red);
  opacity: 0.4;
  user-select: none;
  letter-spacing: -0.05em;
  flex-shrink: 0;
  position: relative;
  top: -0.25rem;
}
.page-products .chapter-body {
  display: flex;
  flex-direction: column;
  gap: 1rem;
  flex: 1;
}
.page-products .chapter-body h2 {
  font-family: var(--font-heading);
  font-size: 1.5rem;
  font-weight: 700;
  font-style: italic;
  margin: 0;
  color: var(--text-primary);
  letter-spacing: -0.01em;
}
.page-products .chapter-desc {
  font-size: 1rem;
  line-height: 1.7;
  color: var(--text-secondary);
  margin: 0;
  max-width: 680px;
}
.page-products .chapter-img {
  max-width: 100%;
  height: auto;
  border-radius: 8px;
  border: 1px solid var(--border-subtle);
  background: var(--metallic-silver);
  object-fit: cover;
  display: block;
  margin: 0.5rem 0;
}
.page-products .stats-visual {
  display: flex;
  flex-direction: column;
  gap: 1.25rem;
  margin: 0.5rem 0;
}
.page-products .stats-chart {
  width: 100%;
  max-width: 320px;
  height: auto;
  background: rgba(11, 12, 16, 0.6);
  border-radius: 8px;
  padding: 0.5rem;
  box-sizing: border-box;
  border: 1px solid var(--border-subtle);
  display: block;
}
.page-products .stats-img {
  max-width: 100%;
  height: auto;
  border-radius: 8px;
  border: 1px solid var(--border-subtle);
}
.page-products .timeline-visual {
  display: flex;
  flex-direction: column;
  gap: 1.25rem;
  margin: 0.5rem 0;
}
.page-products .timeline-svg {
  width: 100%;
  max-width: 600px;
  height: auto;
  background: rgba(11, 12, 16, 0.6);
  border-radius: 8px;
  padding: 0.75rem 0.5rem;
  box-sizing: border-box;
  border: 1px solid var(--border-subtle);
  display: block;
  overflow: visible;
}
.page-products .timeline-img {
  max-width: 100%;
  height: auto;
  border-radius: 8px;
  border: 1px solid var(--border-subtle);
}
.page-products .favorite-visual {
  display: flex;
  align-items: center;
  gap: 1.5rem;
  flex-wrap: wrap;
  margin: 0.5rem 0;
}
.page-products .favorite-icon {
  max-width: 200px;
  height: auto;
  border-radius: 50%;
  border: 2px solid var(--primary-red);
  object-fit: cover;
  flex-shrink: 0;
}
.page-products .favorite-note {
  font-size: 0.95rem;
  color: var(--text-secondary);
  font-style: italic;
  margin: 0;
  flex: 1;
  min-width: 160px;
}
.page-products .v3-img {
  max-width: 100%;
  height: auto;
  border-radius: 8px;
  border: 1px solid var(--border-subtle);
  background: var(--metallic-silver);
}
.page-products .chapter-expand {
  margin-top: 0.5rem;
  border-top: 1px solid var(--border-subtle);
  padding-top: 1rem;
}
.page-products .chapter-toggle {
  background: none;
  border: none;
  color: var(--primary-red);
  font-family: var(--font-body);
  font-size: 0.95rem;
  font-weight: 600;
  cursor: pointer;
  padding: 0.25rem 0;
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  transition: color 0.2s, gap 0.2s;
  letter-spacing: 0.02em;
}
.page-products .chapter-toggle::before {
  content: '▾';
  font-size: 0.8rem;
  transition: transform 0.3s;
  display: inline-block;
}
.page-products .chapter-toggle:hover,
.page-products .chapter-toggle:focus-visible {
  color: var(--accent-orange);
  gap: 0.6rem;
}
.page-products .chapter-toggle[aria-expanded="true"]::before {
  transform: rotate(180deg);
}
.page-products .chapter-detail {
  overflow: hidden;
  max-height: 0;
  transition: max-height 0.4s ease, padding 0.3s ease;
  padding-top: 0;
  padding-bottom: 0;
}
.page-products [data-expandable][data-open] .chapter-detail {
  max-height: 500px;
  padding-top: 0.75rem;
  padding-bottom: 0.25rem;
}
.page-products .chapter-detail ul {
  list-style: none;
  padding: 0;
  margin: 0;
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}
.page-products .chapter-detail li {
  position: relative;
  padding-left: 1.25rem;
  font-size: 0.95rem;
  color: var(--text-secondary);
  line-height: 1.6;
}
.page-products .chapter-detail li::before {
  content: '◆';
  position: absolute;
  left: 0;
  top: 0;
  color: var(--primary-red);
  font-size: 0.6rem;
  line-height: 1.8;
}
.page-products .section-cta {
  margin-top: 3rem;
  padding: 1.5rem 0;
  border-top: 1px solid var(--border-subtle);
  text-align: center;
}
.page-products .section-cta p {
  font-size: 1rem;
  color: var(--text-secondary);
  margin: 0;
}
.page-products .section-cta a {
  color: var(--primary-red);
  text-decoration: none;
  font-weight: 600;
  transition: color 0.2s, border-bottom 0.2s;
  border-bottom: 1px solid transparent;
}
.page-products .section-cta a:hover,
.page-products .section-cta a:focus-visible {
  color: var(--accent-orange);
  border-bottom-color: var(--accent-orange);
}

@media (min-width: 768px) {
  .page-products {
    padding: 2rem 2rem 4rem;
  }
  .page-products .page-header h1 {
    font-size: 2.8rem;
  }
  .page-products .page-subtitle {
    font-size: 1.05rem;
  }
  .page-products .chapter {
    padding: 2.5rem;
  }
  .page-products .chapter-number {
    font-size: 6rem;
    opacity: 0.5;
  }
  .page-products .stats-visual {
    flex-direction: row;
    align-items: flex-start;
  }
  .page-products .stats-chart {
    max-width: 280px;
    flex-shrink: 0;
  }
  .page-products .stats-img {
    flex: 1;
    max-width: calc(100% - 300px);
  }
  .page-products .timeline-visual {
    flex-direction: row;
    align-items: flex-start;
  }
  .page-products .timeline-svg {
    max-width: 480px;
    flex-shrink: 0;
  }
  .page-products .timeline-img {
    flex: 1;
    max-width: calc(100% - 500px);
  }
  .page-products .favorite-icon {
    max-width: 160px;
  }
}
@media (min-width: 1024px) {
  .page-products {
    padding: 2.5rem 3rem 5rem;
  }
  .page-products .page-header h1 {
    font-size: 3.2rem;
  }
  .page-products .chapter {
    flex-direction: row;
    align-items: flex-start;
    gap: 2rem;
    padding: 3rem;
  }
  .page-products .chapter:nth-child(even) {
    flex-direction: row-reverse;
  }
  .page-products .chapter:nth-child(even) .chapter-body {
    text-align: right;
  }
  .page-products .chapter:nth-child(even) .chapter-desc {
    margin-left: auto;
  }
  .page-products .chapter:nth-child(even) .chapter-expand .chapter-detail ul {
    align-items: flex-end;
  }
  .page-products .chapter:nth-child(even) .chapter-expand .chapter-detail li {
    padding-left: 0;
    padding-right: 1.25rem;
    text-align: right;
  }
  .page-products .chapter:nth-child(even) .chapter-expand .chapter-detail li::before {
    left: auto;
    right: 0;
  }
  .page-products .chapter:nth-child(even) .stats-visual {
    flex-direction: row-reverse;
  }
  .page-products .chapter:nth-child(even) .timeline-visual {
    flex-direction: row-reverse;
  }
  .page-products .chapter:nth-child(even) .favorite-visual {
    flex-direction: row-reverse;
  }
  .page-products .chapter-number {
    font-size: 7rem;
    opacity: 0.6;
    line-height: 0.85;
    min-width: 100px;
  }
  .page-products .chapter-body h2 {
    font-size: 1.75rem;
  }
  .page-products .chapter-desc {
    font-size: 1.05rem;
    max-width: 600px;
  }
  .page-products .stats-chart {
    max-width: 320px;
  }
  .page-products .timeline-svg {
    max-width: 520px;
  }
  .page-products .favorite-icon {
    max-width: 180px;
  }
  .page-products .v3-img {
    max-width: 85%;
  }
  .page-products .section-cta p {
    font-size: 1.05rem;
  }
}