.page-products {
  --axis-w: 236px;
  --node-pad: clamp(24px, 4vw, 40px);
}

.page-products img {
  max-width: 100%;
  height: auto;
}

.page-products .breadcrumbs {
  max-width: var(--shell-max);
  margin: 0 auto;
  padding: calc(var(--header-h) + 10px) var(--gutter) 0;
}

/* ---------- 首屏 ---------- */
.page-products .feature-hero {
  padding-block: clamp(20px, 4vw, 40px) clamp(28px, 5vw, 52px);
}

.page-products .hero-grid {
  display: grid;
  gap: clamp(22px, 4vw, 44px);
}

.page-products .hero-copy {
  display: flex;
  flex-direction: column;
  gap: clamp(14px, 2vw, 20px);
}

.page-products .display-title {
  letter-spacing: -0.015em;
}

.page-products .hero-index {
  list-style: none;
  margin: 2px 0 0;
  padding: 0;
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.page-products .hero-index a {
  display: inline-flex;
  align-items: center;
  padding: 7px 13px;
  border-radius: var(--pill);
  border: 1px solid var(--line);
  background: var(--surface);
  color: var(--gray);
  font-size: 13px;
  text-decoration: none;
  transition: color 0.2s var(--ease), border-color 0.2s var(--ease);
}

.page-products .hero-index a:hover,
.page-products .hero-index a:focus-visible {
  color: var(--teal);
  border-color: var(--line-strong);
}

.page-products .hero-panel {
  padding: clamp(18px, 3vw, 28px);
  display: flex;
  flex-direction: column;
  gap: 14px;
}

.page-products .panel-caption {
  margin: 0;
  font-size: 12px;
  letter-spacing: 0.18em;
  color: var(--gray);
}

.page-products .tree-svg {
  width: 100%;
  height: auto;
  display: block;
}

.page-products .tree-line {
  fill: none;
  stroke: rgba(61, 245, 212, 0.34);
  stroke-width: 2;
  stroke-dasharray: 4 7;
}

.page-products .tree-dot {
  stroke: none;
}

.page-products .tree-dot--teal {
  fill: var(--teal);
}

.page-products .tree-dot--gold {
  fill: var(--gold);
}

.page-products .tree-dot--brick {
  fill: var(--brick);
}

.page-products .tree-dot--volt {
  fill: var(--volt);
}

.page-products .tree-label {
  fill: var(--mist);
  font-family: var(--font-head);
  font-size: 13px;
  letter-spacing: 0.02em;
}

.page-products .hero-metrics {
  list-style: none;
  margin: 0;
  padding: 15px 0 0;
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 12px;
  border-top: 1px solid var(--line-soft);
}

.page-products .hero-metrics li {
  display: flex;
  flex-direction: column;
  gap: 2px;
  min-width: 0;
}

.page-products .hero-metrics .data-num {
  font-size: clamp(22px, 3vw, 30px);
}

.page-products .hero-metrics .data-unit {
  font-size: 12px;
  color: var(--gray);
}

/* ---------- 左轴 + 画布 ---------- */
.page-products .skill-shell {
  display: grid;
  gap: clamp(20px, 4vw, 44px);
  padding-block: clamp(20px, 3vw, 34px) clamp(40px, 6vw, 78px);
}

.page-products .skill-axis {
  display: flex;
  flex-direction: column;
  gap: 22px;
}

.page-products .axis-title {
  margin: 0 0 10px;
  font-size: 12px;
  letter-spacing: 0.18em;
  color: var(--gray);
}

.page-products .chapter-nav {
  display: flex;
  flex-direction: column;
  gap: 2px;
}

.page-products .chapter-link {
  display: block;
  padding: 8px 12px;
  border-radius: var(--radius-sm);
  font-size: 14px;
  white-space: nowrap;
}

.page-products .dim-pills {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.page-products .dim-pill {
  padding: 6px 12px;
  border-radius: var(--pill);
  border: 1px solid var(--line);
  background: var(--surface);
  color: var(--mist);
  font-size: 13px;
}

.page-products .dim-pill--on {
  border-color: var(--line-strong);
  background: var(--teal);
  color: var(--ink-900);
}

.page-products .axis-note {
  margin: 10px 0 0;
  font-size: 12px;
  line-height: 1.7;
  color: var(--gray);
}

/* ---------- 功能节点 ---------- */
.page-products .node {
  position: relative;
  padding: var(--node-pad) 0;
  border-top: 1px solid var(--line-soft);
}

.page-products .node:first-child {
  border-top: 0;
  padding-top: clamp(8px, 2vw, 18px);
}

.page-products .node-head {
  display: flex;
  align-items: baseline;
  flex-wrap: wrap;
  gap: 14px;
  margin-bottom: 14px;
}

.page-products .node-index {
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: 0.16em;
  color: var(--teal);
}

.page-products .section-title {
  margin: 0;
}

.page-products .node-text {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.page-products .node-grid {
  display: grid;
  gap: clamp(18px, 3vw, 32px);
}

.page-products .node > .media-frame {
  margin-top: clamp(18px, 3vw, 28px);
}

.page-products .node-details {
  margin-top: clamp(16px, 2.5vw, 24px);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--surface-deep);
}

.page-products .node-details summary {
  list-style: none;
  cursor: pointer;
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 13px 16px;
  font-family: var(--font-head);
  font-size: 14px;
  color: var(--teal);
  border-radius: var(--radius);
}

.page-products .node-details summary::-webkit-details-marker {
  display: none;
}

.page-products .node-details summary::before {
  content: "+";
  font-family: var(--font-mono);
  font-size: 16px;
  line-height: 1;
  color: var(--teal);
}

.page-products .node-details[open] summary::before {
  content: "–";
}

.page-products .node-details summary:focus-visible {
  outline: 2px solid var(--volt);
  outline-offset: 2px;
}

.page-products .detail-body {
  padding: 0 16px 16px;
}

.page-products .detail-list {
  margin: 0;
  padding-left: 18px;
  display: flex;
  flex-direction: column;
  gap: 8px;
  font-family: var(--font-body);
  font-size: 15px;
  line-height: 1.8;
  color: var(--gray);
}

.page-products .detail-list strong {
  color: var(--mist);
  font-family: var(--font-head);
}

/* ---------- 变更对照带 ---------- */
.page-products .compare-strip {
  margin-top: clamp(18px, 3vw, 26px);
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
  border: 1px solid var(--line-soft);
  border-radius: var(--radius);
  background: var(--surface-deep);
}

.page-products .compare-strip:focus-visible {
  outline: 2px solid var(--volt);
  outline-offset: 3px;
}

.page-products .compare-table {
  width: 100%;
  min-width: 620px;
  border-collapse: collapse;
  font-size: 14px;
}

.page-products .compare-caption {
  padding: 12px 16px;
  text-align: left;
  font-size: 12px;
  letter-spacing: 0.1em;
  color: var(--gray);
}

.page-products .compare-table th,
.page-products .compare-table td {
  padding: 11px 16px;
  text-align: left;
  border-top: 1px solid var(--line-soft);
}

.page-products .compare-table thead th {
  border-top: 0;
  font-weight: 500;
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--gray);
}

.page-products .compare-table tbody th {
  font-family: var(--font-head);
  font-weight: 600;
  color: var(--mist);
  white-space: nowrap;
}

.page-products .compare-table tbody td {
  font-family: var(--font-body);
  color: var(--gray);
}

.page-products .compare-table tbody tr:nth-child(odd) {
  background: var(--surface);
}

/* ---------- 设备线框 ---------- */
.page-products .device-grid {
  list-style: none;
  margin: clamp(18px, 3vw, 26px) 0 0;
  padding: 0;
  display: grid;
  gap: 14px;
}

.page-products .device-frame {
  display: flex;
  flex-direction: column;
  gap: 10px;
  padding: 16px;
  border: 1px solid var(--line-strong);
  border-radius: var(--radius);
  background: var(--surface);
}

.page-products .device-name {
  margin: 0;
  font-family: var(--font-head);
  font-size: 15px;
  letter-spacing: 0.04em;
  color: var(--mist);
}

.page-products .device-screen {
  display: block;
  border: 1px dashed var(--line-strong);
  border-radius: var(--radius-sm);
  background: linear-gradient(160deg, rgba(61, 245, 212, 0.12), rgba(91, 140, 255, 0.06));
}

.page-products .device-screen--phone {
  height: 92px;
}

.page-products .device-screen--tablet {
  height: 76px;
}

.page-products .device-screen--desktop {
  height: 60px;
}

.page-products .device-note {
  margin: 0;
  font-family: var(--font-body);
  font-size: 13px;
  line-height: 1.75;
  color: var(--gray);
}

/* ---------- 三步路径 ---------- */
.page-products .entry-steps {
  list-style: none;
  margin: clamp(18px, 3vw, 26px) 0 0;
  padding: 0;
  display: grid;
  gap: 18px;
}

.page-products .entry-steps li {
  position: relative;
  padding-left: 44px;
}

.page-products .step-num {
  position: absolute;
  left: 0;
  top: -1px;
  width: 28px;
  height: 28px;
  display: grid;
  place-items: center;
  border-radius: 50%;
  background: var(--teal);
  color: var(--ink-900);
  font-family: var(--font-mono);
  font-size: 14px;
}

.page-products .entry-steps p {
  margin: 0;
  font-family: var(--font-body);
  font-size: 15px;
  line-height: 1.8;
  color: var(--gray);
}

.page-products .entry-steps a {
  color: var(--volt);
}

/* ---------- 适用场景 ---------- */
.page-products .scenario-list {
  list-style: none;
  margin: clamp(18px, 3vw, 26px) 0 0;
  padding: 0;
  display: grid;
  gap: 1px;
  background: var(--line-soft);
}

.page-products .scenario-list li {
  padding: 18px 16px 18px 20px;
  border-left: 2px solid rgba(61, 245, 212, 0.3);
  background: var(--bg);
}

.page-products .scenario-title {
  margin: 0 0 6px;
  font-family: var(--font-head);
  font-size: 17px;
  letter-spacing: 0.02em;
  color: var(--mist);
}

.page-products .scenario-list p {
  margin: 0;
  font-family: var(--font-body);
  font-size: 15px;
  line-height: 1.8;
  color: var(--gray);
}

/* ---------- 收尾 ---------- */
.page-products .closing {
  padding-block: clamp(32px, 6vw, 70px);
}

.page-products .closing-grid {
  display: grid;
  gap: clamp(18px, 3vw, 28px);
}

.page-products .closing-panel,
.page-products .closing-cta {
  display: flex;
  flex-direction: column;
  gap: 14px;
  padding: clamp(20px, 3vw, 32px);
}

.page-products .closing-cta .prose {
  margin: 0;
}

.page-products .closing-cta .btn-row {
  margin-top: auto;
}

/* ---------- 响应式 ---------- */
@media (max-width: 1023px) {
  .page-products .chapter-nav {
    flex-direction: row;
    overflow-x: auto;
    gap: 6px;
    padding-bottom: 8px;
  }

  .page-products .chapter-link {
    border: 1px solid var(--line);
    border-radius: var(--pill);
    background: var(--surface);
  }
}

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

@media (min-width: 780px) {
  .page-products .scenario-list {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .page-products .entry-steps {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 24px;
  }
}

@media (min-width: 880px) {
  .page-products .node-grid {
    grid-template-columns: minmax(0, 1.1fr) minmax(0, 0.9fr);
    align-items: start;
  }
}

@media (min-width: 900px) {
  .page-products .closing-grid {
    grid-template-columns: minmax(0, 1.08fr) minmax(0, 0.92fr);
    align-items: stretch;
  }
}

@media (min-width: 960px) {
  .page-products .hero-grid {
    grid-template-columns: minmax(0, 1.06fr) minmax(0, 0.94fr);
    align-items: start;
  }
}

@media (min-width: 1024px) {
  .page-products .skill-shell {
    grid-template-columns: var(--axis-w) minmax(0, 1fr);
    align-items: start;
  }

  .page-products .skill-axis {
    position: sticky;
    top: calc(var(--header-h) + 22px);
  }

  .page-products .node {
    padding-left: 36px;
  }

  .page-products .node::before {
    content: "";
    position: absolute;
    left: 6px;
    top: 0;
    bottom: 0;
    width: 2px;
    background: linear-gradient(180deg, rgba(61, 245, 212, 0.04), rgba(61, 245, 212, 0.34) 18%, rgba(61, 245, 212, 0.05));
  }

  .page-products .node::after {
    content: "";
    position: absolute;
    left: 0;
    top: 44px;
    width: 14px;
    height: 14px;
    border-radius: 50%;
    border: 2px solid var(--teal);
    background: var(--ink-800);
  }

  .page-products .node:first-child::after {
    top: 22px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-products .hero-index a {
    transition: none;
  }
}