.page-products {
  --grid-line: rgba(245, 247, 250, 0.08);
  --gold-soft-line: rgba(232, 184, 75, 0.5);
  --card-bg: linear-gradient(135deg, rgba(18, 26, 59, 0.92) 0%, rgba(10, 14, 39, 0.96) 100%);
}

.page-products .breadcrumb {
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 1.25rem var(--container-pad) 0;
}

.page-products .breadcrumb-list {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.5rem;
  list-style: none;
  margin: 0;
  padding: 0;
}

.page-products .breadcrumb-link {
  font-size: 0.8rem;
  color: var(--c-moon);
  text-decoration: none;
  transition: color 0.2s ease;
}

.page-products .breadcrumb-link:hover,
.page-products .breadcrumb-link:focus-visible {
  color: var(--c-gold);
}

.page-products .breadcrumb-sep {
  color: var(--c-galaxy);
  font-size: 0.8rem;
}

.page-products .breadcrumb-current {
  font-size: 0.8rem;
  color: var(--c-gold);
}

.page-products .overview {
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 2rem var(--container-pad) 0;
}

.page-products .overview-frame {
  position: relative;
  border: 1px solid var(--grid-line);
  background: var(--grad-stellar);
  overflow: hidden;
}

.page-products .overview-frame::before,
.page-products .overview-frame::after {
  content: "";
  position: absolute;
  width: 2.75rem;
  height: 2.75rem;
  border-color: var(--c-gold);
  border-style: solid;
  z-index: 2;
  pointer-events: none;
}

.page-products .overview-frame::before {
  top: 0;
  left: 0;
  border-width: 2px 0 0 2px;
}

.page-products .overview-frame::after {
  bottom: 0;
  right: 0;
  border-width: 0 2px 2px 0;
}

.page-products .overview-copy {
  padding: 2.25rem 1.5rem;
  position: relative;
  z-index: 1;
}

.page-products .expo-tag {
  display: inline-block;
  margin: 0 0 1rem;
  padding: 0.35rem 0.8rem;
  border: 1px solid var(--gold-soft-line);
  color: var(--c-gold);
  font-size: 0.75rem;
  letter-spacing: 0.12em;
  line-height: 1.4;
  text-transform: uppercase;
}

.page-products .overview-copy h1 {
  margin: 0 0 1.25rem;
  font-family: var(--font-display);
  font-size: clamp(2rem, 4.5vw, 3.4rem);
  line-height: 1.15;
  letter-spacing: 0.01em;
  color: var(--c-pearl);
  max-width: 12em;
}

.page-products .overview-lede {
  margin: 0 0 1.5rem;
  max-width: 36rem;
  font-size: 1rem;
  line-height: 1.75;
  color: var(--c-moon);
}

.page-products .overview-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem 0.75rem;
  margin-bottom: 1.75rem;
}

.page-products .overview-meta-item {
  padding: 0.3rem 0.75rem;
  border: 1px solid var(--grid-line);
  background: rgba(18, 26, 59, 0.6);
  color: var(--c-pearl);
  font-size: 0.75rem;
  letter-spacing: 0.05em;
}

.page-products .overview-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
}

.page-products .btn {
  display: inline-flex;
  align-items: center;
  padding: 0.75rem 1.25rem;
  border: 1px solid transparent;
  font-size: 0.875rem;
  text-decoration: none;
  line-height: 1;
  cursor: pointer;
  transition: border-color 0.25s ease, background-color 0.25s ease, color 0.25s ease;
}

.page-products .btn-primary {
  background: var(--c-gold);
  color: var(--c-deep);
  font-weight: 600;
  border-color: var(--c-gold);
}

.page-products .btn-primary:hover,
.page-products .btn-primary:focus-visible {
  background: var(--c-gold-soft);
  border-color: var(--c-gold-soft);
}

.page-products .btn-ghost {
  background: transparent;
  color: var(--c-pearl);
  border-color: var(--c-galaxy);
}

.page-products .btn-ghost:hover,
.page-products .btn-ghost:focus-visible {
  color: var(--c-gold);
  border-color: var(--gold-soft-line);
}

.page-products .overview-visual {
  border-top: 1px solid var(--grid-line);
  background: var(--c-nebula);
}

.page-products .media-frame {
  position: relative;
  overflow: hidden;
  line-height: 0;
}

.page-products .media-frame img {
  width: 100%;
  max-width: 100%;
  height: auto;
  object-fit: cover;
}

.page-products .media-caption {
  display: block;
  padding: 0.65rem 0.85rem;
  background: rgba(10, 14, 39, 0.85);
  border-top: 1px solid var(--grid-line);
  color: var(--c-moon);
  font-size: 0.75rem;
  line-height: 1.5;
  letter-spacing: 0.03em;
}

.page-products .overview-index {
  margin-top: 1.5rem;
}

.page-products .overview-index .idx-item {
  position: relative;
  display: grid;
  grid-template-columns: 2.5rem 1fr;
  gap: 0.4rem 0.75rem;
  padding: 1.1rem 2rem 1.1rem 0;
  border-bottom: 1px solid var(--grid-line);
  text-decoration: none;
  align-items: start;
  transition: background-color 0.25s ease, padding-left 0.25s ease;
}

.page-products .overview-index .idx-item:hover,
.page-products .overview-index .idx-item:focus-visible {
  background-color: rgba(232, 184, 75, 0.04);
  padding-left: 0.4rem;
}

.page-products .overview-index .idx-item::after {
  content: "→";
  position: absolute;
  right: 0.4rem;
  top: 50%;
  transform: translateY(-50%);
  color: var(--c-gold);
  opacity: 0.45;
  transition: opacity 0.25s ease, transform 0.25s ease;
}

.page-products .overview-index .idx-item:hover::after,
.page-products .overview-index .idx-item:focus-visible::after {
  opacity: 1;
  transform: translateY(-50%) translateX(3px);
}

.page-products .overview-index .idx-num {
  font-family: var(--font-display);
  font-size: 0.75rem;
  letter-spacing: 0.12em;
  color: var(--c-gold);
  line-height: 1.6;
}

.page-products .overview-index .idx-name {
  font-size: 1rem;
  font-weight: 600;
  line-height: 1.4;
  color: var(--c-pearl);
}

.page-products .overview-index .idx-route {
  grid-column: 2;
  font-size: 0.75rem;
  line-height: 1.5;
  color: var(--c-moon);
  letter-spacing: 0.03em;
}

.page-products .section {
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 3.5rem var(--container-pad);
}

.page-products .section-head {
  position: relative;
  display: flex;
  gap: 1rem;
  margin-bottom: 2rem;
  padding-bottom: 1.25rem;
  border-bottom: 1px solid var(--grid-line);
}

.page-products .section-head::before {
  content: "";
  position: absolute;
  bottom: -1px;
  left: 0;
  width: 3rem;
  height: 2px;
  background: var(--grad-gold);
  z-index: 2;
}

.page-products .section-index {
  flex-shrink: 0;
  padding-top: 0.4rem;
  font-family: var(--font-display);
  font-size: 0.875rem;
  letter-spacing: 0.14em;
  color: var(--c-gold);
}

.page-products .section-head h2 {
  margin: 0 0 0.4rem;
  font-family: var(--font-display);
  font-size: var(--t-h2);
  line-height: 1.3;
  color: var(--c-pearl);
}

.page-products .section-desc {
  margin: 0;
  max-width: 42rem;
  font-size: 0.95rem;
  line-height: 1.7;
  color: var(--c-moon);
}

.page-products .feature-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1rem;
  margin: 0 0 2.5rem;
}

.page-products .f-card {
  position: relative;
  border: 1px solid var(--grid-line);
  background: var(--card-bg);
  overflow: hidden;
  transition: border-color 0.3s var(--ease-out), background-color 0.3s var(--ease-out), transform 0.3s var(--ease-out);
  cursor: default;
}

.page-products .f-card::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  height: 2px;
  width: 0;
  background: var(--grad-gold);
  transition: width 0.35s var(--ease-out);
  z-index: 2;
}

.page-products .f-card::after {
  content: "";
  position: absolute;
  right: 0;
  bottom: 0;
  width: 1rem;
  height: 1rem;
  border-right: 1px solid var(--gold-soft-line);
  border-bottom: 1px solid var(--gold-soft-line);
  opacity: 0.55;
  transition: opacity 0.3s ease;
  pointer-events: none;
}

.page-products .f-card:hover,
.page-products .f-card:focus-within {
  border-color: var(--gold-soft-line);
  background-color: rgba(28, 43, 74, 0.5);
  transform: translateY(-2px);
}

.page-products .f-card:hover::before,
.page-products .f-card:focus-within::before {
  width: 100%;
}

.page-products .f-card:hover::after,
.page-products .f-card:focus-within::after {
  opacity: 1;
}

.page-products .f-card:focus-visible {
  outline: 2px solid var(--c-gold);
  outline-offset: 2px;
}

.page-products .f-card-head {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  padding: 1.25rem 1.25rem 0.75rem;
}

.page-products .f-card-sn {
  font-family: var(--font-display);
  font-size: 0.7rem;
  line-height: 1;
  color: var(--c-gold);
  border: 1px solid var(--gold-soft-line);
  padding: 0.3rem 0.45rem;
  flex-shrink: 0;
}

.page-products .f-card-icon {
  flex-shrink: 0;
  width: 24px;
  height: 24px;
  opacity: 0.85;
  transition: opacity 0.3s ease;
}

.page-products .f-card:hover .f-card-icon,
.page-products .f-card:focus-within .f-card-icon {
  opacity: 1;
}

.page-products .f-card:hover .f-card-icon rect,
.page-products .f-card:hover .f-card-icon circle,
.page-products .f-card:hover .f-card-icon path,
.page-products .f-card:focus-within .f-card-icon rect,
.page-products .f-card:focus-within .f-card-icon circle,
.page-products .f-card:focus-within .f-card-icon path {
  stroke: var(--c-gold-soft);
}

.page-products .f-card-title {
  flex: 1;
  margin: 0;
  font-family: var(--font-display);
  font-size: 1.15rem;
  color: var(--c-pearl);
  line-height: 1.4;
}

.page-products .f-card-arrow {
  flex-shrink: 0;
  font-size: 1.1rem;
  color: var(--c-gold);
  opacity: 0.55;
  transition: opacity 0.25s ease, transform 0.25s ease;
}

.page-products .f-card:hover .f-card-arrow,
.page-products .f-card:focus-within .f-card-arrow {
  opacity: 1;
  transform: translateX(3px);
}

.page-products .f-card-summary {
  margin: 0 1.25rem;
  color: var(--c-moon);
  font-size: 0.875rem;
  line-height: 1.65;
}

.page-products .f-card-detail {
  max-height: 0;
  margin: 0;
  padding: 0 1.25rem;
  overflow: hidden;
  border-top: 1px solid transparent;
  opacity: 0;
  transition: max-height 0.35s var(--ease-out), opacity 0.3s ease, padding-top 0.3s ease, padding-bottom 0.3s ease, margin-top 0.3s ease, border-color 0.3s ease;
}

.page-products .f-card:hover .f-card-detail,
.page-products .f-card:focus-within .f-card-detail {
  max-height: 320px;
  margin-top: 0.75rem;
  padding-top: 0.75rem;
  padding-bottom: 1.25rem;
  border-top-color: var(--gold-soft-line);
  opacity: 1;
}

.page-products .f-card-detail p {
  margin: 0;
  color: var(--c-pearl);
  font-size: 0.85rem;
  line-height: 1.7;
}

.page-products .feature-visual {
  max-width: 560px;
  margin: 0 auto;
}

.page-products .scenario-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1rem;
  margin-bottom: 2.5rem;
}

.page-products .scenario-item {
  position: relative;
  padding: 1.4rem 1.4rem 1.4rem 2.2rem;
  border: 1px solid var(--grid-line);
  background: rgba(18, 26, 59, 0.55);
  transition: border-color 0.25s ease, background-color 0.25s ease;
}

.page-products .scenario-item::before {
  content: "";
  position: absolute;
  left: 0;
  top: 1.25rem;
  width: 0.5rem;
  height: 0.5rem;
  background: var(--c-gold);
  transform: translateX(-50%);
  box-shadow: 0 0 0 3px rgba(232, 184, 75, 0.15);
}

.page-products .scenario-item:hover,
.page-products .scenario-item:focus-within {
  border-color: var(--gold-soft-line);
  background-color: rgba(28, 43, 74, 0.4);
}

.page-products .scenario-sn {
  display: inline-block;
  margin-bottom: 0.5rem;
  font-family: var(--font-display);
  font-size: 0.7rem;
  letter-spacing: 0.12em;
  color: var(--c-gold);
}

.page-products .scenario-item h3 {
  margin: 0 0 0.6rem;
  font-family: var(--font-display);
  font-size: 1.05rem;
  color: var(--c-pearl);
}

.page-products .scenario-item p {
  margin: 0;
  color: var(--c-moon);
  font-size: 0.9rem;
  line-height: 1.7;
}

.page-products .scenario-visual {
  max-width: 560px;
  margin: 0 auto;
}

.page-products .version-cover {
  margin-bottom: 1.5rem;
}

.page-products .version-list {
  border-top: 1px solid var(--grid-line);
}

.page-products .version-row {
  display: grid;
  grid-template-columns: 3.25rem 1fr;
  gap: 0.25rem 1rem;
  padding: 1.4rem 0;
  border-bottom: 1px solid var(--grid-line);
  transition: background-color 0.25s ease;
}

.page-products .version-row:hover {
  background: rgba(232, 184, 75, 0.03);
}

.page-products .version-code {
  font-family: var(--font-display);
  font-size: 0.8rem;
  letter-spacing: 0.1em;
  color: var(--c-gold);
  padding-top: 0.2rem;
}

.page-products .version-name {
  font-family: var(--font-display);
  font-size: 1rem;
  font-weight: 600;
  color: var(--c-pearl);
}

.page-products .version-desc {
  grid-column: 2;
  color: var(--c-moon);
  font-size: 0.875rem;
  line-height: 1.6;
}

.page-products .sync-visual {
  margin-top: 1.5rem;
}

.page-products .section-cta {
  padding-top: 0.5rem;
  padding-bottom: 4rem;
}

.page-products .cta-panel {
  position: relative;
  border: 1px solid var(--gold-soft-line);
  background: var(--grad-stellar);
  padding: 2.5rem 1.5rem;
  text-align: center;
  overflow: hidden;
}

.page-products .cta-panel::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 2px;
  background: var(--grad-gold);
}

.page-products .cta-panel .expo-tag {
  display: inline-block;
}

.page-products .cta-panel h2 {
  margin: 0 0 1.5rem;
  font-family: var(--font-display);
  font-size: var(--t-h3);
  color: var(--c-pearl);
}

.page-products .cta-links {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  justify-content: center;
}

.page-products a:focus-visible {
  outline: 2px solid var(--c-gold);
  outline-offset: 2px;
}

@media (min-width: 860px) {
  .page-products .overview-frame {
    display: grid;
    grid-template-columns: 1.05fr 0.95fr;
  }

  .page-products .overview-copy {
    padding: 3.5rem;
    border-right: 1px solid var(--grid-line);
  }

  .page-products .overview-visual {
    border-top: 0;
  }

  .page-products .overview-visual .media-frame {
    height: 100%;
    min-height: 340px;
  }

  .page-products .overview-visual .media-frame img {
    position: absolute;
    inset: 0;
    width: 100%;
    height: 100%;
    object-fit: cover;
  }

  .page-products .overview-visual .media-caption {
    position: relative;
    z-index: 1;
  }

  .page-products .overview-index .idx-item {
    grid-template-columns: 4rem 11rem 1fr;
    align-items: center;
    padding-top: 1.25rem;
    padding-bottom: 1.25rem;
    padding-left: 0.5rem;
  }

  .page-products .overview-index .idx-route {
    grid-column: 3;
  }

  .page-products .feature-grid {
    grid-template-columns: 1fr 1fr;
    gap: 1.5rem;
  }

  .page-products .scenario-grid {
    grid-template-columns: 1fr 1fr;
    gap: 1.5rem;
  }

  .page-products .version-row {
    grid-template-columns: 4rem 10rem 1fr;
    align-items: start;
    gap: 0.5rem 1rem;
  }

  .page-products .version-desc {
    grid-column: 3;
  }

  .page-products .feature-visual,
  .page-products .scenario-visual {
    max-width: 600px;
  }
}

@media (min-width: 1280px) {
  .page-products .overview-copy {
    padding: 4rem;
  }

  .page-products .section {
    padding-left: calc(var(--container-pad) * 0.75);
    padding-right: calc(var(--container-pad) * 0.75);
  }
}