.page-products {
  --prod-panel: rgba(12, 36, 56, 0.55);
  --prod-panel-deep: rgba(4, 16, 28, 0.5);
  --prod-line-strong: #1E3A52;
  color: var(--paper);
}

.page-products .prod-caption {
  margin: 10px 0 0;
  font-size: 0.8rem;
  line-height: 1.6;
  color: var(--muted-dim);
}

/* ---------- hero ---------- */
.page-products .prod-hero {
  position: relative;
  padding: 22px 0 46px;
  border-bottom: 1px solid var(--prod-line-strong);
  background:
    radial-gradient(120% 90% at 88% 0%, rgba(56, 242, 208, 0.10), transparent 62%),
    linear-gradient(180deg, rgba(12, 36, 56, 0.85) 0%, rgba(7, 26, 43, 0) 78%);
}

.page-products .prod-hero__grid {
  display: grid;
  gap: 30px;
  margin-top: 22px;
}

.page-products .prod-hero__title {
  margin: 12px 0 16px;
  font-family: var(--font-display);
  font-size: clamp(1.95rem, 7.4vw, 3.3rem);
  font-weight: 900;
  line-height: 1.08;
  letter-spacing: -0.02em;
  color: var(--paper);
  overflow-wrap: anywhere;
}

.page-products .prod-hero__desc {
  margin: 0;
  max-width: 48ch;
  font-size: 0.98rem;
  line-height: 1.8;
  color: var(--muted);
}

.page-products .prod-hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 24px;
}

.page-products .prod-hero__actions .btn {
  flex: 1 1 180px;
  text-align: center;
}

.page-products .prod-hero__meta {
  display: grid;
  grid-template-columns: 1fr;
  gap: 10px;
  margin: 26px 0 0;
  padding: 0;
  list-style: none;
}

.page-products .prod-hero__meta li {
  display: grid;
  gap: 3px;
  padding: 12px 14px;
  border: 1px solid var(--prod-line-strong);
  border-left: 3px solid var(--cyan);
  background: var(--prod-panel-deep);
}

.page-products .prod-hero__meta .mono {
  font-family: var(--font-mono);
  font-size: 1.02rem;
  font-variant-numeric: tabular-nums;
  color: var(--cyan);
  letter-spacing: 0.02em;
}

.page-products .prod-hero__meta span:last-child {
  font-size: 0.84rem;
  color: var(--muted);
}

.page-products .prod-hero__device .media {
  box-shadow: var(--shadow-hard);
}

/* ---------- section shell ---------- */
.page-products .prod-section {
  padding: 48px 0;
  border-bottom: 1px solid rgba(30, 58, 82, 0.6);
}

.page-products .prod-section__head {
  max-width: 64ch;
  margin-bottom: 26px;
}

.page-products .prod-section__index {
  display: inline-block;
  margin-bottom: 14px;
  padding: 4px 10px;
  border: 1px solid var(--prod-line-strong);
  font-family: var(--font-mono);
  font-size: 0.74rem;
  letter-spacing: 0.14em;
  color: var(--orange);
  background: var(--prod-panel-deep);
}

.page-products .prod-section__title {
  margin: 0 0 12px;
  font-family: var(--font-display);
  font-size: clamp(1.45rem, 4.6vw, 2.1rem);
  font-weight: 800;
  line-height: 1.2;
  letter-spacing: -0.01em;
  color: var(--paper);
}

.page-products .prod-section__lead {
  margin: 0;
  font-size: 0.95rem;
  line-height: 1.78;
  color: var(--muted);
}

/* ---------- 01 spec board ---------- */
.page-products .spec-board {
  border: 1px solid var(--prod-line-strong);
  border-top: 4px solid var(--cyan);
  background: var(--prod-panel);
  box-shadow: var(--shadow-deep);
}

.page-products .spec-row {
  display: grid;
  gap: 6px;
  padding: 16px 16px 18px;
  border-bottom: 1px solid rgba(30, 58, 82, 0.6);
}

.page-products .spec-row:last-child {
  border-bottom: 0;
}

.page-products .spec-key {
  font-family: var(--font-mono);
  font-size: 0.76rem;
  letter-spacing: 0.12em;
  color: var(--cyan);
}

.page-products .spec-val {
  margin: 0;
  font-size: 0.92rem;
  line-height: 1.75;
  color: var(--muted);
}

.page-products .spec-val strong {
  color: var(--paper);
  font-weight: 600;
}

/* ---------- 02 version axis ---------- */
.page-products .axis-layout {
  display: grid;
  gap: 26px;
}

.page-products .axis-rail {
  padding-left: 18px;
  border-left: 2px solid var(--prod-line-strong);
}

.page-products .axis-node {
  position: relative;
  padding-bottom: 22px;
}

.page-products .axis-node:last-child {
  padding-bottom: 0;
}

.page-products .axis-node::before {
  content: "";
  position: absolute;
  left: -25px;
  top: 5px;
  width: 10px;
  height: 10px;
  background: var(--prod-line-strong);
}

.page-products .axis-node--current::before {
  background: var(--cyan);
  box-shadow: 0 0 0 4px rgba(56, 242, 208, 0.16);
}

.page-products .axis-node__num {
  display: block;
  font-family: var(--font-mono);
  font-size: 1.02rem;
  font-weight: 600;
  font-variant-numeric: tabular-nums;
  color: var(--muted);
}

.page-products .axis-node--current .axis-node__num {
  color: var(--cyan);
}

.page-products .axis-node__label {
  display: block;
  margin-top: 3px;
  font-size: 0.82rem;
  line-height: 1.55;
  color: var(--muted-dim);
}

.page-products .axis-body {
  display: grid;
  gap: 16px;
  min-width: 0;
}

.page-products .axis-block {
  padding: 16px;
  border: 1px solid var(--prod-line-strong);
  border-left: 4px solid var(--orange);
  background: var(--prod-panel);
}

.page-products .axis-block__title {
  margin: 0 0 13px;
  font-family: var(--font-display);
  font-size: 1rem;
  font-weight: 700;
  letter-spacing: 0.02em;
  color: var(--paper);
}

.page-products .diff-grid {
  display: grid;
  gap: 10px;
}

.page-products .diff-col {
  padding: 13px 14px;
  border: 1px solid var(--prod-line-strong);
  background: var(--prod-panel-deep);
}

.page-products .diff-col--new {
  border-color: rgba(56, 242, 208, 0.45);
  background: rgba(56, 242, 208, 0.07);
}

.page-products .diff-tag {
  display: inline-block;
  margin-bottom: 9px;
  padding: 2px 7px;
  border: 1px solid var(--prod-line-strong);
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.12em;
  color: var(--muted-dim);
}

.page-products .diff-col--new .diff-tag {
  border-color: rgba(56, 242, 208, 0.5);
  color: var(--cyan);
}

.page-products .diff-col p {
  margin: 0;
  font-size: 0.88rem;
  line-height: 1.7;
  color: var(--muted);
}

.page-products .diff-col--new p {
  color: var(--paper);
}

.page-products .axis-body .media {
  margin-top: 6px;
  box-shadow: var(--shadow-hard);
}

/* ---------- 03 install path ---------- */
.page-products .install-layout {
  display: grid;
  gap: 26px;
}

.page-products .install-steps {
  min-width: 0;
}

.page-products .device-panel {
  margin-bottom: 12px;
  border: 1px solid var(--prod-line-strong);
  background: var(--prod-panel);
}

.page-products .device-panel[open] {
  border-color: rgba(56, 242, 208, 0.4);
}

.page-products .device-panel__summary {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 10px;
  padding: 14px 16px;
  list-style: none;
  cursor: pointer;
  font-family: var(--font-display);
  font-size: 0.98rem;
  font-weight: 700;
  color: var(--paper);
}

.page-products .device-panel__summary::-webkit-details-marker {
  display: none;
}

.page-products .device-panel__summary::after {
  content: "+";
  margin-left: auto;
  font-family: var(--font-mono);
  font-size: 1.1rem;
  color: var(--cyan);
}

.page-products .device-panel[open] .device-panel__summary::after {
  content: "–";
}

.page-products .device-panel__name {
  min-width: 0;
  overflow-wrap: anywhere;
}

.page-products .device-panel__body {
  padding: 4px 16px 20px;
  border-top: 1px solid rgba(30, 58, 82, 0.6);
}

.page-products .step-list {
  position: relative;
  display: grid;
  gap: 18px;
  margin: 16px 0 0;
  padding: 0;
  list-style: none;
}

.page-products .step {
  position: relative;
  display: grid;
  grid-template-columns: 42px minmax(0, 1fr);
  gap: 13px;
}

.page-products .step::before {
  content: "";
  position: absolute;
  left: 20px;
  top: 42px;
  bottom: -18px;
  width: 2px;
  background: linear-gradient(180deg, rgba(56, 242, 208, 0.45), rgba(30, 58, 82, 0.15));
}

.page-products .step:last-child::before {
  display: none;
}

.page-products .step__num {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 42px;
  height: 34px;
  border: 1px solid rgba(56, 242, 208, 0.5);
  background: var(--prod-panel-deep);
  font-family: var(--font-mono);
  font-size: 0.85rem;
  font-variant-numeric: tabular-nums;
  color: var(--cyan);
}

.page-products .step__body {
  min-width: 0;
  padding-top: 2px;
}

.page-products .step__title {
  margin: 0 0 5px;
  font-family: var(--font-display);
  font-size: 0.95rem;
  font-weight: 700;
  color: var(--paper);
}

.page-products .step__text {
  margin: 0;
  font-size: 0.9rem;
  line-height: 1.72;
  color: var(--muted);
}

.page-products .install-visual .media {
  box-shadow: var(--shadow-hard);
}

/* ---------- 04 reading ---------- */
.page-products .reading-grid {
  gap: 14px;
}

.page-products .reading-card {
  padding: 18px;
  border: 1px solid var(--prod-line-strong);
  border-bottom: 4px solid var(--prod-line-strong);
  background: var(--prod-panel);
}

.page-products .reading-card:nth-child(1) {
  border-bottom-color: var(--cyan);
}

.page-products .reading-card:nth-child(2) {
  border-bottom-color: var(--orange);
}

.page-products .reading-card:nth-child(3) {
  border-bottom-color: var(--green);
}

.page-products .reading-card--link {
  border-bottom-color: var(--muted-dim);
}

.page-products .reading-card__title {
  margin: 0 0 9px;
  font-family: var(--font-display);
  font-size: 0.98rem;
  font-weight: 700;
  color: var(--paper);
}

.page-products .reading-card p {
  margin: 0;
  font-size: 0.9rem;
  line-height: 1.75;
  color: var(--muted);
}

.page-products .reading-card .btn {
  margin-top: 14px;
  display: inline-block;
}

/* ---------- 05 checklists ---------- */
.page-products .checklist-layout {
  display: grid;
  gap: 26px;
}

.page-products .checklist-groups {
  min-width: 0;
}

.page-products .list-group {
  margin-bottom: 12px;
  border: 1px solid var(--prod-line-strong);
  background: var(--prod-panel);
}

.page-products .list-group[open] {
  border-left: 4px solid var(--orange);
}

.page-products .list-group__summary {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 9px;
  padding: 13px 15px;
  list-style: none;
  cursor: pointer;
  font-size: 0.94rem;
  font-weight: 600;
  color: var(--paper);
}

.page-products .list-group__summary::-webkit-details-marker {
  display: none;
}

.page-products .list-group__summary > span:first-child {
  min-width: 0;
  overflow-wrap: anywhere;
}

.page-products .list-group__body {
  padding: 14px 15px 16px;
  border-top: 1px solid rgba(30, 58, 82, 0.6);
}

.page-products .list-group__body p {
  margin: 0;
  font-size: 0.9rem;
  line-height: 1.78;
  color: var(--muted);
}

.page-products .checklist-more {
  margin: 18px 0 0;
  font-size: 0.9rem;
  line-height: 1.8;
  color: var(--muted);
}

.page-products .checklist-more a {
  color: var(--cyan);
  text-decoration: underline;
  text-underline-offset: 3px;
}

.page-products .checklist-visual .media {
  box-shadow: var(--shadow-hard);
}

/* ---------- 06 switch ---------- */
.page-products .switch-layout {
  display: grid;
  gap: 26px;
}

.page-products .switch-copy {
  min-width: 0;
}

.page-products .switch-item {
  padding: 0 0 16px 16px;
  border-left: 2px solid var(--prod-line-strong);
  margin-bottom: 16px;
}

.page-products .switch-item:last-of-type {
  margin-bottom: 0;
}

.page-products .switch-item__title {
  margin: 0 0 6px;
  font-family: var(--font-display);
  font-size: 0.98rem;
  font-weight: 700;
  color: var(--paper);
}

.page-products .switch-item p {
  margin: 0;
  font-size: 0.9rem;
  line-height: 1.75;
  color: var(--muted);
}

.page-products .prep-box {
  margin-top: 22px;
  padding: 18px 16px;
  border: 2px solid var(--prod-line-strong);
  background: var(--prod-panel-deep);
  box-shadow: var(--shadow-hard);
}

.page-products .prep-box__title {
  margin: 0 0 12px;
  font-family: var(--font-mono);
  font-size: 0.8rem;
  font-weight: 600;
  letter-spacing: 0.12em;
  color: var(--orange);
}

.page-products .prep-list {
  margin: 0;
  padding: 0;
  list-style: none;
  display: grid;
  gap: 10px;
}

.page-products .prep-list li {
  display: grid;
  grid-template-columns: 34px minmax(0, 1fr);
  gap: 10px;
  font-size: 0.89rem;
  line-height: 1.7;
  color: var(--muted);
}

.page-products .prep-list .mono {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  color: var(--cyan);
  font-variant-numeric: tabular-nums;
}

.page-products .prep-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 16px;
}

.page-products .prep-actions .btn {
  flex: 1 1 160px;
  text-align: center;
}

.page-products .switch-visual .media {
  box-shadow: var(--shadow-hard);
}

/* ---------- closing cta ---------- */
.page-products .prod-cta {
  display: grid;
  gap: 18px;
  margin: 44px 0 52px;
  padding: 24px 18px;
  border: 2px solid var(--cyan);
  background: linear-gradient(120deg, rgba(56, 242, 208, 0.12), rgba(255, 106, 61, 0.09) 70%, rgba(7, 26, 43, 0));
  box-shadow: var(--shadow-hard);
}

.page-products .prod-cta__title {
  margin: 0 0 8px;
  font-family: var(--font-display);
  font-size: clamp(1.2rem, 4vw, 1.6rem);
  font-weight: 800;
  line-height: 1.28;
  color: var(--paper);
}

.page-products .prod-cta__text {
  margin: 0;
  font-size: 0.9rem;
  line-height: 1.75;
  color: var(--muted);
}

.page-products .prod-cta__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.page-products .prod-cta__actions .btn {
  flex: 1 1 160px;
  text-align: center;
}

/* ---------- responsive ---------- */
@media (min-width: 620px) {
  .page-products .prod-hero__meta {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

  .page-products .diff-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (min-width: 760px) {
  .page-products .spec-row {
    grid-template-columns: 170px minmax(0, 1fr);
    align-items: baseline;
    gap: 18px;
    padding: 18px 22px;
  }

  .page-products .prod-hero__actions .btn,
  .page-products .prep-actions .btn,
  .page-products .prod-cta__actions .btn {
    flex: 0 0 auto;
  }

  .page-products .prod-cta {
    grid-template-columns: minmax(0, 1fr) auto;
    align-items: center;
    padding: 28px 26px;
  }
}

@media (min-width: 960px) {
  .page-products .prod-hero {
    padding: 26px 0 58px;
  }

  .page-products .prod-hero__grid {
    grid-template-columns: minmax(0, 1.08fr) minmax(0, 0.88fr);
    align-items: end;
    gap: 44px;
  }

  .page-products .prod-section {
    padding: 64px 0;
  }

  .page-products .axis-layout {
    grid-template-columns: 214px minmax(0, 1fr);
    gap: 38px;
    align-items: start;
  }

  .page-products .axis-rail {
    position: sticky;
    top: 108px;
  }

  .page-products .axis-body .media {
    margin-top: 10px;
  }

  .page-products .install-layout {
    grid-template-columns: minmax(0, 1.15fr) minmax(0, 0.85fr);
    gap: 38px;
    align-items: start;
  }

  .page-products .install-visual {
    position: sticky;
    top: 108px;
  }

  .page-products .checklist-layout {
    grid-template-columns: minmax(0, 1.1fr) minmax(0, 0.9fr);
    gap: 38px;
    align-items: start;
  }

  .page-products .switch-layout {
    grid-template-columns: minmax(0, 1.05fr) minmax(0, 0.95fr);
    gap: 38px;
    align-items: start;
  }

  .page-products .reading-grid {
    gap: 18px;
  }
}
<<<END>>>