.page-products {
  --products-gap: 2rem;
  --products-radius: 12px;
  --products-card-bg: var(--glass-light);
  --products-card-border: var(--glass-medium);
  --products-transition: 0.4s cubic-bezier(0.25, 0.46, 0.45, 0.94);
  position: relative;
  display: flex;
  flex-direction: column;
  gap: 0;
  width: 100%;
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 1.25rem 3rem;
  color: var(--text-primary);
  font-family: var(--font-body);
}

/* ---------- breadcrumb ---------- */
.page-products .breadcrumb {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  padding: 1rem 0 0.5rem;
  font-size: 0.85rem;
  font-family: var(--font-mono);
  color: var(--neutral-gray);
  letter-spacing: 0.02em;
}
.page-products .breadcrumb-link {
  color: var(--accent-blue);
  text-decoration: none;
  transition: color var(--transition-speed);
}
.page-products .breadcrumb-link:hover {
  color: var(--accent-green);
  text-decoration: underline;
}
.page-products .breadcrumb-sep {
  color: var(--neutral-gray);
  font-weight: 300;
}
.page-products .breadcrumb-current {
  color: var(--text-secondary);
  font-weight: 500;
}

/* ---------- hero ---------- */
.page-products .products-hero {
  position: relative;
  display: flex;
  flex-direction: column;
  align-items: center;
  padding: 2.5rem 1rem 3rem;
  margin-bottom: var(--products-gap);
  border-radius: var(--products-radius);
  overflow: hidden;
  min-height: 520px;
}
.page-products .hero-bg-img {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center top;
  z-index: 0;
}
.page-products .hero-overlay {
  position: absolute;
  inset: 0;
  z-index: 1;
  background: linear-gradient(135deg, rgba(13,13,13,0.85) 20%, rgba(13,13,13,0.4) 80%);
}
.page-products .hero-content {
  position: relative;
  z-index: 2;
  text-align: center;
  max-width: 720px;
  margin-bottom: 2rem;
}
.page-products .hero-heading {
  font-family: var(--font-heading);
  font-size: clamp(2.2rem, 6vw, 3.8rem);
  font-weight: 800;
  letter-spacing: -0.02em;
  margin: 0 0 0.75rem;
  background: linear-gradient(135deg, var(--accent-green), var(--accent-blue));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  line-height: 1.15;
}
.page-products .hero-desc {
  font-size: clamp(1rem, 2vw, 1.2rem);
  color: var(--text-secondary);
  max-width: 560px;
  margin: 0 auto 1.5rem;
  line-height: 1.7;
}
.page-products .hero-metrics {
  display: flex;
  justify-content: center;
  gap: 2rem;
  flex-wrap: wrap;
}
.page-products .metric-item {
  display: flex;
  align-items: center;
  gap: 0.4rem;
  font-size: 0.95rem;
  color: var(--text-secondary);
  font-family: var(--font-body);
}
.page-products .metric-num {
  font-size: 1.4rem;
  font-weight: 700;
  color: var(--accent-green);
  font-family: var(--font-mono);
}

/* ---------- func cards grid ---------- */
.page-products .products-grid {
  position: relative;
  z-index: 2;
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 1.5rem;
  width: 100%;
  max-width: 1000px;
  margin-top: 1rem;
}
.page-products .func-card {
  background: var(--glass-light);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border: 1px solid var(--glass-medium);
  border-radius: var(--products-radius);
  overflow: hidden;
  transition: border-color var(--products-transition), box-shadow var(--products-transition);
  list-style: none;
}
.page-products .func-card::-webkit-details-marker {
  display: none;
}
.page-products .func-card:hover {
  border-color: var(--accent-green);
  box-shadow: 0 0 24px rgba(57, 255, 20, 0.08);
}
.page-products .func-card-summary {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.6rem 0.8rem;
  padding: 1.5rem 1.25rem;
  cursor: pointer;
  user-select: none;
  position: relative;
}
.page-products .func-card-summary::-webkit-details-marker {
  display: none;
}
.page-products .func-card-icon {
  flex-shrink: 0;
  width: 36px;
  height: 36px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: rgba(57, 255, 20, 0.08);
  border-radius: 8px;
}
.page-products .func-card-title {
  font-family: var(--font-heading);
  font-size: 1.15rem;
  font-weight: 700;
  color: var(--text-primary);
  flex: 1 1 auto;
  min-width: 100px;
}
.page-products .func-card-brief {
  font-size: 0.85rem;
  color: var(--neutral-gray);
  font-family: var(--font-mono);
  width: 100%;
  order: 1;
  padding-left: 0.2rem;
}
.page-products .func-card-toggle {
  margin-left: auto;
  font-size: 1.6rem;
  font-weight: 300;
  color: var(--accent-green);
  font-family: var(--font-mono);
  line-height: 1;
  transition: transform var(--products-transition);
  flex-shrink: 0;
}
.page-products .func-card[open] .func-card-toggle {
  transform: rotate(45deg);
  color: var(--accent-blue);
}
.page-products .func-card-detail {
  padding: 0 1.25rem 1.5rem;
  border-top: 1px solid var(--glass-medium);
  animation: slideDown 0.3s ease;
}
@keyframes slideDown {
  from { opacity: 0; max-height: 0; }
  to { opacity: 1; max-height: 400px; }
}
.page-products .func-card-detail p {
  color: var(--text-secondary);
  font-size: 0.95rem;
  line-height: 1.7;
  margin: 1rem 0 0.75rem;
}
.page-products .func-detail-list {
  list-style: none;
  padding: 0;
  margin: 0;
  display: flex;
  flex-direction: column;
  gap: 0.4rem;
}
.page-products .func-detail-list li {
  font-size: 0.9rem;
  color: var(--text-secondary);
  padding-left: 1.2rem;
  position: relative;
  font-family: var(--font-mono);
}
.page-products .func-detail-list li::before {
  content: ">";
  position: absolute;
  left: 0;
  color: var(--accent-green);
  font-weight: 700;
}

/* ---------- versions section ---------- */
.page-products .products-versions {
  padding: 3rem 0;
  margin-bottom: var(--products-gap);
}
.page-products .section-title {
  font-family: var(--font-heading);
  font-size: clamp(1.6rem, 4vw, 2.4rem);
  font-weight: 800;
  color: var(--text-primary);
  margin: 0 0 0.5rem;
  letter-spacing: -0.01em;
}
.page-products .section-title.light {
  color: var(--text-primary);
}
.page-products .section-desc {
  font-size: 1rem;
  color: var(--neutral-gray);
  margin: 0 0 1.5rem;
  max-width: 600px;
  font-family: var(--font-body);
}
.page-products .version-filters {
  display: flex;
  gap: 0.75rem;
  margin-bottom: 2rem;
  flex-wrap: wrap;
}
.page-products .filter-label {
  display: inline-flex;
  cursor: pointer;
}
.page-products .filter-radio {
  position: absolute;
  opacity: 0;
  width: 0;
  height: 0;
  pointer-events: none;
}
.page-products .filter-btn {
  display: inline-block;
  padding: 0.5rem 1.2rem;
  border-radius: 100px;
  border: 1px solid var(--glass-medium);
  background: transparent;
  color: var(--text-secondary);
  font-family: var(--font-mono);
  font-size: 0.85rem;
  transition: all var(--transition-speed);
  cursor: pointer;
  user-select: none;
}
.page-products .filter-radio:checked + .filter-btn {
  background: var(--accent-green);
  color: var(--bg-primary);
  border-color: var(--accent-green);
  font-weight: 600;
  box-shadow: 0 0 20px rgba(57, 255, 20, 0.25);
}
.page-products .filter-btn:hover {
  border-color: var(--accent-blue);
  color: var(--accent-blue);
}
.page-products .version-cards-scroll {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 1.5rem;
  width: 100%;
  overflow-x: visible;
}
.page-products .version-card {
  background: var(--glass-light);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  border: 1px solid var(--glass-medium);
  border-radius: var(--products-radius);
  padding: 1.5rem;
  transition: all var(--products-transition);
  position: relative;
  display: flex;
  flex-direction: column;
  gap: 1rem;
}
.page-products .version-card:hover {
  border-color: var(--accent-blue);
  transform: translateY(-4px);
  box-shadow: 0 12px 40px rgba(0, 191, 255, 0.08);
}
.page-products .version-card-header {
  display: flex;
  align-items: center;
  gap: 0.75rem;
}
.page-products .version-badge {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  font-weight: 600;
  padding: 0.25rem 0.7rem;
  border-radius: 4px;
  text-transform: uppercase;
  letter-spacing: 0.06em;
}
.page-products .version-badge.green {
  background: rgba(57, 255, 20, 0.15);
  color: var(--accent-green);
  border: 1px solid rgba(57, 255, 20, 0.3);
}
.page-products .version-badge.blue {
  background: rgba(0, 191, 255, 0.12);
  color: var(--accent-blue);
  border: 1px solid rgba(0, 191, 255, 0.25);
}
.page-products .version-badge.gray {
  background: rgba(140, 140, 140, 0.15);
  color: var(--neutral-gray);
  border: 1px solid rgba(140, 140, 140, 0.2);
}
.page-products .version-name {
  font-family: var(--font-heading);
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--text-primary);
  margin: 0;
}
.page-products .version-card-img {
  width: 100%;
  height: auto;
  max-height: 180px;
  object-fit: cover;
  border-radius: 8px;
  border: 1px solid var(--glass-medium);
}
.page-products .version-features {
  list-style: none;
  padding: 0;
  margin: 0;
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}
.page-products .version-features li {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  font-size: 0.9rem;
  color: var(--text-secondary);
  font-family: var(--font-body);
}
.page-products .feature-dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--accent-green);
  flex-shrink: 0;
}
.page-products .version-tag {
  align-self: flex-start;
  font-family: var(--font-mono);
  font-size: 0.7rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  padding: 0.2rem 0.8rem;
  border-radius: 4px;
  background: rgba(57, 255, 20, 0.12);
  color: var(--accent-green);
  border: 1px solid rgba(57, 255, 20, 0.25);
}

/* filter visibility logic */
.page-products .filter-radio[value="v76"]:checked ~ .version-cards-scroll .version-card:not([data-version="v76"]),
.page-products .filter-radio[value="pro"]:checked ~ .version-cards-scroll .version-card:not([data-version="pro"]),
.page-products .filter-radio[value="standard"]:checked ~ .version-cards-scroll .version-card:not([data-version="standard"]) {
  opacity: 0.35;
  filter: grayscale(0.6);
  transform: scale(0.97);
  pointer-events: none;
}
.page-products .filter-radio[value="v76"]:checked ~ .version-cards-scroll [data-version="v76"],
.page-products .filter-radio[value="pro"]:checked ~ .version-cards-scroll [data-version="pro"],
.page-products .filter-radio[value="standard"]:checked ~ .version-cards-scroll [data-version="standard"] {
  border-color: var(--accent-green);
  box-shadow: 0 0 30px rgba(57, 255, 20, 0.12);
}

/* ---------- features section ---------- */
.page-products .products-features {
  padding: 2rem 0 3rem;
  margin-bottom: var(--products-gap);
}
.page-products .features-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 2rem;
  margin-top: 1.5rem;
}
@media (min-width: 768px) {
  .page-products .features-grid {
    grid-template-columns: 1fr 1fr;
  }
}
.page-products .feature-card {
  display: flex;
  flex-direction: column;
  background: var(--glass-light);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  border: 1px solid var(--glass-medium);
  border-radius: var(--products-radius);
  overflow: hidden;
  transition: border-color var(--products-transition), box-shadow var(--products-transition);
}
.page-products .feature-card:hover {
  border-color: var(--accent-blue);
  box-shadow: 0 8px 32px rgba(0, 191, 255, 0.06);
}
.page-products .feature-card-content {
  padding: 1.5rem 1.5rem 0.5rem;
  order: 1;
}
.page-products .feature-card-title {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  font-family: var(--font-heading);
  font-size: 1.2rem;
  font-weight: 700;
  color: var(--text-primary);
  margin: 0 0 0.75rem;
}
.page-products .feature-card-icon {
  flex-shrink: 0;
}
.page-products .feature-card-desc {
  font-size: 0.95rem;
  color: var(--text-secondary);
  line-height: 1.7;
  margin: 0 0 0.75rem;
}
.page-products .feature-card-list {
  list-style: none;
  padding: 0;
  margin: 0 0 1rem;
  display: flex;
  flex-direction: column;
  gap: 0.35rem;
}
.page-products .feature-card-list li {
  font-size: 0.88rem;
  color: var(--text-secondary);
  padding-left: 1.2rem;
  position: relative;
  font-family: var(--font-mono);
}
.page-products .feature-card-list li::before {
  content: ">";
  position: absolute;
  left: 0;
  color: var(--accent-blue);
  font-weight: 700;
}
.page-products .feature-card-img {
  width: 100%;
  height: auto;
  max-height: 220px;
  object-fit: cover;
  object-position: center;
  order: 2;
  border-top: 1px solid var(--glass-medium);
}
@media (min-width: 768px) {
  .page-products .feature-card {
    flex-direction: column;
  }
  .page-products .feature-card-img {
    max-height: 200px;
  }
}

/* ---------- latest section ---------- */
.page-products .products-latest {
  position: relative;
  display: flex;
  flex-direction: column;
  align-items: center;
  padding: 3rem 1.5rem;
  border-radius: var(--products-radius);
  overflow: hidden;
  margin-top: 1.5rem;
  min-height: 280px;
}
.page-products .latest-bg-img {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center;
  z-index: 0;
}
.page-products .latest-overlay {
  position: absolute;
  inset: 0;
  z-index: 1;
  background: linear-gradient(135deg, rgba(13,13,13,0.9) 40%, rgba(0,191,255,0.15) 100%);
}
.page-products .latest-content {
  position: relative;
  z-index: 2;
  text-align: center;
  max-width: 640px;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.75rem;
}
.page-products .latest-desc {
  font-size: 1.05rem;
  color: var(--text-secondary);
  line-height: 1.7;
  margin: 0;
}
.page-products .latest-highlights {
  list-style: none;
  padding: 0;
  margin: 0.5rem 0 1rem;
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 0.6rem 1.5rem;
}
.page-products .latest-highlights li {
  display: flex;
  align-items: center;
  gap: 0.35rem;
  font-size: 0.95rem;
  color: var(--text-secondary);
  font-family: var(--font-mono);
}
.page-products .highlight-icon {
  color: var(--accent-green);
  font-size: 0.75rem;
}
.page-products .download-btn {
  margin-top: 0.75rem;
  padding: 0.75rem 2.5rem;
  font-family: var(--font-mono);
  font-size: 1rem;
  font-weight: 600;
  border: none;
  border-radius: 100px;
  background: var(--accent-green);
  color: var(--bg-primary);
  cursor: pointer;
  transition: all var(--products-transition);
  letter-spacing: 0.02em;
  position: relative;
  overflow: hidden;
}
.page-products .download-btn:hover {
  background: var(--accent-blue);
  color: var(--text-primary);
  transform: scale(1.04);
  box-shadow: 0 0 40px rgba(0, 191, 255, 0.3);
}
.page-products .download-btn:active {
  transform: scale(0.97);
}

/* ---------- glass-card shared ---------- */
.page-products .glass-card {
  background: var(--glass-light);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border: 1px solid var(--glass-medium);
}

/* ---------- responsive ---------- */
@media (max-width: 639px) {
  .page-products {
    padding: 0 0.75rem 2rem;
  }
  .page-products .products-hero {
    padding: 1.5rem 0.75rem 2rem;
    min-height: auto;
  }
  .page-products .hero-metrics {
    gap: 1rem;
  }
  .page-products .products-grid {
    grid-template-columns: 1fr;
    gap: 1rem;
  }
  .page-products .func-card-summary {
    padding: 1rem 0.9rem;
  }
  .page-products .func-card-detail {
    padding: 0 0.9rem 1.2rem;
  }
  .page-products .version-cards-scroll {
    display: flex;
    flex-direction: column;
    gap: 1rem;
  }
  .page-products .version-card {
    padding: 1.1rem;
  }
  .page-products .version-card-img {
    max-height: 140px;
  }
  .page-products .features-grid {
    gap: 1.25rem;
  }
  .page-products .feature-card-content {
    padding: 1rem 1rem 0.25rem;
  }
  .page-products .feature-card-img {
    max-height: 160px;
  }
  .page-products .products-latest {
    padding: 2rem 1rem;
  }
  .page-products .latest-highlights {
    flex-direction: column;
    align-items: center;
    gap: 0.4rem;
  }
  .page-products .download-btn {
    width: 100%;
    max-width: 320px;
    padding: 0.7rem 1.5rem;
    font-size: 0.95rem;
  }
}

@media (min-width: 640px) and (max-width: 1023px) {
  .page-products .products-hero {
    padding: 2rem 1.5rem 2.5rem;
  }
  .page-products .version-cards-scroll {
    grid-template-columns: repeat(2, 1fr);
  }
  .page-products .features-grid {
    grid-template-columns: 1fr;
    max-width: 600px;
    margin-left: auto;
    margin-right: auto;
  }
  .page-products .feature-card-img {
    max-height: 200px;
  }
}

@media (min-width: 1024px) {
  .page-products .version-cards-scroll {
    grid-template-columns: repeat(3, 1fr);
  }
  .page-products .version-card:hover {
    transform: translateY(-6px);
  }
  .page-products .features-grid {
    grid-template-columns: 1fr 1fr;
  }
}