.page-products {
  --feat-soft: #C9D8CC;
  --feat-card: #12402F;
  --feat-panel-soft: rgba(22, 81, 62, .42);
  --feat-ink-soft: #2A4438;
  --feat-line-light: #C7D4C4;
  background: var(--pit-deep);
  color: var(--paper);
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.8;
  padding-bottom: clamp(48px, 7vw, 96px);
}

.page-products h1,
.page-products h2,
.page-products h3 {
  font-family: var(--font-display);
  font-weight: 800;
  letter-spacing: .03em;
  line-height: 1.18;
  margin: 0;
}

.page-products h2 {
  font-size: clamp(24px, 3.4vw, 32px);
  color: var(--paper);
}

.page-products p {
  margin: 0;
  font-size: 16px;
  line-height: 1.85;
}

.page-products .eyebrow {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .18em;
  color: var(--mint);
  text-transform: uppercase;
  margin: 0 0 10px;
}

.page-products .feat-inline {
  color: var(--mint);
  text-decoration: underline;
  text-underline-offset: 3px;
  transition: color var(--dur) var(--ease);
}

.page-products .feat-inline:hover,
.page-products .feat-inline:focus-visible {
  color: var(--lime);
}

.page-products .feat-crumb {
  padding-top: clamp(14px, 2.4vw, 26px);
}

/* ---------- 首屏 ---------- */
.page-products .feat-hero {
  padding-block: clamp(18px, 3.4vw, 40px) clamp(36px, 6vw, 76px);
}

.page-products .feat-hero__inner {
  display: grid;
  gap: clamp(26px, 4vw, 44px);
}

.page-products .feat-hero__lead h1 {
  font-size: clamp(30px, 5.4vw, 52px);
  margin: 0 0 18px;
  color: var(--paper);
}

.page-products .feat-hero__mark {
  color: var(--lime);
  position: relative;
  white-space: nowrap;
}

.page-products .feat-hero__mark::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: -.08em;
  height: 3px;
  border-radius: var(--radius-pill);
  background: var(--lime);
  opacity: .78;
}

.page-products .feat-hero__sub {
  color: var(--feat-soft);
  max-width: 34em;
}

.page-products .feat-hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: clamp(20px, 3vw, 30px);
}

.page-products .feat-hero__facts {
  list-style: none;
  margin: clamp(22px, 3vw, 32px) 0 0;
  padding: 0;
  display: flex;
  flex-wrap: wrap;
  gap: 8px 20px;
}

.page-products .feat-hero__facts li {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 13px;
  color: var(--mist);
  letter-spacing: .04em;
}

.page-products .feat-hero__facts li::before {
  content: "";
  width: 6px;
  height: 6px;
  border-radius: 2px;
  background: var(--mint);
  flex: none;
}

.page-products .feat-board {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 10px;
}

.page-products .feat-board__cell {
  background: var(--panel);
  border: 1px solid var(--tick);
  border-radius: var(--radius-md);
  padding: clamp(14px, 2vw, 20px);
  display: flex;
  flex-direction: column;
  gap: 6px;
  min-width: 0;
}

.page-products .feat-board__cell--wide {
  grid-column: 1 / -1;
  background: transparent;
  border-style: dashed;
}

.page-products .feat-board__num {
  font-family: var(--font-mono);
  font-weight: 600;
  font-size: clamp(26px, 3.8vw, 40px);
  line-height: 1;
  color: var(--lime);
  letter-spacing: .02em;
}

.page-products .feat-board__cell--amber .feat-board__num {
  color: var(--amber);
}

.page-products .feat-board__cap {
  font-size: 12.5px;
  color: var(--mist);
  letter-spacing: .06em;
  line-height: 1.5;
}

.page-products .feat-board__note {
  font-family: var(--font-mono);
  font-size: 12.5px;
  letter-spacing: .1em;
  color: var(--feat-soft);
  line-height: 1.7;
}

/* ---------- 路径区 ---------- */
.page-products .feat-path {
  padding-block: clamp(34px, 5.4vw, 68px);
  border-top: 1px solid var(--tick);
}

.page-products .feat-path__head {
  max-width: 46em;
  margin-bottom: clamp(22px, 3.4vw, 36px);
}

.page-products .feat-path__lede {
  color: var(--feat-soft);
  margin-top: 12px;
  max-width: 40em;
}

.page-products .feat-path__grid {
  display: grid;
  gap: clamp(20px, 3vw, 40px);
}

.page-products .feat-path__index {
  border: 1px solid var(--tick);
  border-radius: var(--radius-md);
  background: var(--feat-panel-soft);
  padding: 12px;
  min-width: 0;
}

.page-products .feat-path__index-title {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .2em;
  color: var(--mist);
  padding: 2px 6px 10px;
}

.page-products .feat-path__index-list {
  list-style: none;
  margin: 0;
  padding: 0 0 2px;
  display: flex;
  gap: 8px;
  overflow-x: auto;
  scrollbar-width: thin;
}

.page-products .feat-path__index-link {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  white-space: nowrap;
  padding: 8px 14px;
  border-radius: var(--radius-pill);
  border: 1px solid var(--tick);
  color: var(--feat-soft);
  font-size: 13.5px;
  text-decoration: none;
  transition: border-color var(--dur) var(--ease), color var(--dur) var(--ease), background var(--dur) var(--ease);
}

.page-products .feat-path__index-link:hover,
.page-products .feat-path__index-link:focus-visible {
  border-color: var(--mint);
  color: var(--paper);
  background: var(--panel);
}

.page-products .feat-path__num {
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--lime);
  letter-spacing: .08em;
}

.page-products .feat-tree {
  position: relative;
  min-width: 0;
}

.page-products .feat-tree__svg {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  opacity: .45;
  pointer-events: none;
}

.page-products .feat-tree__nodes {
  list-style: none;
  margin: 0;
  padding: 0;
  position: relative;
  display: grid;
  gap: 10px;
}

.page-products .feat-tree__node a {
  display: grid;
  grid-template-columns: auto auto minmax(0, 1fr) auto;
  align-items: center;
  gap: 10px;
  padding: 13px 16px;
  border-radius: var(--radius-md);
  background: var(--panel);
  border: 1px solid var(--tick);
  color: var(--paper);
  text-decoration: none;
  transition: border-color var(--dur) var(--ease), background var(--dur) var(--ease), transform var(--dur) var(--ease);
}

.page-products .feat-tree__node a:hover,
.page-products .feat-tree__node a:focus-visible {
  border-color: var(--mint);
  background: var(--feat-card);
  transform: translateX(3px);
}

.page-products .feat-tree__dot {
  width: 9px;
  height: 9px;
  border-radius: 50%;
  background: var(--mint);
  flex: none;
  transition: background var(--dur) var(--ease), box-shadow var(--dur) var(--ease);
}

.page-products .feat-tree__node a:hover .feat-tree__dot,
.page-products .feat-tree__node a:focus-visible .feat-tree__dot {
  background: var(--lime);
  box-shadow: 0 0 0 4px rgba(198, 255, 61, .18);
}

.page-products .feat-tree__key {
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--mist);
  letter-spacing: .08em;
}

.page-products .feat-tree__name {
  font-size: 15px;
  line-height: 1.55;
}

.page-products .feat-tree__hint {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .06em;
  color: var(--mist);
  border: 1px solid var(--tick);
  border-radius: var(--radius-pill);
  padding: 1px 8px;
  white-space: nowrap;
}

/* ---------- 能力章节 ---------- */
.page-products .feat-cap {
  padding-block: clamp(36px, 6vw, 74px);
  border-top: 1px solid var(--tick);
}

.page-products .feat-cap__head {
  display: flex;
  gap: clamp(12px, 2vw, 22px);
  align-items: flex-start;
  margin-bottom: clamp(20px, 3vw, 32px);
}

.page-products .feat-cap__key {
  font-family: var(--font-mono);
  font-weight: 600;
  font-size: clamp(24px, 3.4vw, 34px);
  line-height: 1;
  color: var(--lime);
  letter-spacing: .04em;
  flex: none;
  padding-top: 4px;
}

.page-products .feat-cap__lede {
  color: var(--feat-soft);
  margin-top: 10px;
  max-width: 36em;
}

.page-products .feat-cap__body {
  display: grid;
  gap: clamp(22px, 3.4vw, 44px);
  min-width: 0;
}

.page-products .feat-cap__text {
  min-width: 0;
  max-width: 42em;
}

.page-products .feat-cap__text p + p {
  margin-top: 1em;
}

.page-products .feat-cap__text p {
  color: var(--feat-soft);
}

.page-products .feat-cap__text p:first-child {
  color: var(--paper);
}

.page-products .feat-cap__media {
  margin: 0;
  border-radius: var(--radius-lg);
  overflow: hidden;
  border: 1px solid var(--tick);
  background: var(--feat-card);
  min-width: 0;
}

.page-products .feat-cap__media img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  object-fit: cover;
}

.page-products .feat-cap__media figcaption {
  font-size: 12.5px;
  line-height: 1.7;
  color: var(--mist);
  padding: 12px 16px 14px;
  border-top: 1px solid var(--tick);
}

.page-products .feat-cap__media--tall {
  max-width: 320px;
}

.page-products .feat-steps {
  list-style: none;
  margin: 0 0 1.2em;
  padding: 0;
  display: grid;
  gap: 10px;
}

.page-products .feat-steps li {
  border-left: 2px solid var(--tick);
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
  background: var(--feat-panel-soft);
  padding: 12px 16px;
  font-size: 15px;
  color: var(--feat-soft);
  line-height: 1.75;
}

.page-products .feat-steps strong {
  display: inline-block;
  color: var(--lime);
  font-weight: 600;
  margin-right: 8px;
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: .08em;
}

.page-products .feat-metrics {
  list-style: none;
  margin: 0 0 1.2em;
  padding: 0;
  display: grid;
  gap: 8px;
  grid-template-columns: 1fr;
}

.page-products .feat-metrics li {
  background: var(--panel);
  border: 1px solid var(--tick);
  border-radius: var(--radius-sm);
  padding: 11px 14px;
}

.page-products .feat-metrics b {
  display: block;
  font-family: var(--font-mono);
  font-size: 12.5px;
  font-weight: 600;
  letter-spacing: .1em;
  color: var(--lime);
  margin-bottom: 3px;
}

.page-products .feat-metrics span {
  display: block;
  font-size: 14px;
  line-height: 1.65;
  color: var(--feat-soft);
}

.page-products .feat-diff {
  border: 1px solid var(--tick);
  border-radius: var(--radius-md);
  background: var(--feat-panel-soft);
  padding: 14px 16px;
  display: grid;
  gap: 12px;
  margin: 1.2em 0;
}

.page-products .feat-diff__row {
  display: grid;
  grid-template-columns: 4.6em minmax(0, 1fr) minmax(0, 1fr);
  gap: 10px;
  align-items: center;
}

.page-products .feat-diff__row > span:first-child {
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: .06em;
  color: var(--mist);
}

.page-products .feat-diff__bar {
  height: 8px;
  border-radius: var(--radius-pill);
  background: linear-gradient(90deg, rgba(123, 224, 195, .22), var(--mint));
}

.page-products .feat-diff__bar--b {
  background: linear-gradient(90deg, rgba(255, 107, 53, .22), var(--amber));
}

.page-products .feat-diff__bar--a-up {
  background: linear-gradient(90deg, rgba(198, 255, 61, .2), var(--lime));
}

.page-products .feat-diff__bar--b-up {
  background: linear-gradient(90deg, rgba(255, 107, 53, .18), var(--amber));
}

.page-products .feat-diff__bar--b-down {
  background: linear-gradient(90deg, var(--amber), rgba(255, 107, 53, .16));
}

/* ---------- 浅色反转区 ---------- */
.page-products .feat-cap--light {
  background: var(--light-zone);
  border-top: 0;
  border-radius: var(--radius-lg);
  color: var(--ink);
  margin-block: clamp(24px, 4vw, 48px);
}

.page-products .feat-cap--light h2 {
  color: var(--ink);
}

.page-products .feat-cap--light .feat-cap__key {
  color: #1F7A5C;
}

.page-products .feat-cap--light .feat-cap__lede {
  color: var(--feat-ink-soft);
}

.page-products .feat-cap--light .feat-cap__text p {
  color: var(--feat-ink-soft);
}

.page-products .feat-cap--light .feat-cap__text p:first-child {
  color: var(--ink);
}

.page-products .feat-cap--light .feat-cap__media {
  border-color: var(--feat-line-light);
  background: #DCE5D6;
}

.page-products .feat-cap--light .feat-cap__media figcaption {
  border-top-color: var(--feat-line-light);
  color: #4A6156;
}

.page-products .feat-shelf {
  list-style: none;
  margin: 1.2em 0 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 10px;
}

.page-products .feat-shelf__item {
  background: #FFFFFF;
  border: 1px solid var(--feat-line-light);
  border-radius: var(--radius-sm);
  padding: 10px 12px;
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 8px;
  font-size: 13px;
  line-height: 1.55;
  color: #20463A;
  min-width: 0;
}

.page-products .feat-shelf__item--wide {
  grid-column: 1 / -1;
}

.page-products .feat-shelf__flag {
  font-family: var(--font-mono);
  font-size: 10.5px;
  letter-spacing: .04em;
  color: #1F7A5C;
  border: 1px dashed #1F7A5C;
  border-radius: var(--radius-pill);
  padding: 1px 7px;
  white-space: nowrap;
  flex: none;
}

/* ---------- 尾段入口 ---------- */
.page-products .feat-next {
  padding-block: clamp(34px, 5.4vw, 70px);
  border-top: 1px solid var(--tick);
}

.page-products .feat-next__list {
  list-style: none;
  margin: clamp(20px, 3vw, 30px) 0 0;
  padding: 0;
  display: grid;
  gap: 10px;
}

.page-products .feat-next__list a {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 14px;
  padding: 16px 18px;
  border: 1px solid var(--tick);
  border-radius: var(--radius-md);
  background: var(--feat-panel-soft);
  color: var(--paper);
  text-decoration: none;
  font-size: 15px;
  line-height: 1.5;
  transition: border-color var(--dur) var(--ease), background var(--dur) var(--ease);
}

.page-products .feat-next__list a::after {
  content: "→";
  font-family: var(--font-mono);
  color: var(--mist);
  flex: none;
  transition: color var(--dur) var(--ease), transform var(--dur) var(--ease);
}

.page-products .feat-next__list a:hover,
.page-products .feat-next__list a:focus-visible {
  border-color: var(--mint);
  background: var(--panel);
}

.page-products .feat-next__list a:hover::after,
.page-products .feat-next__list a:focus-visible::after {
  color: var(--lime);
  transform: translateX(3px);
}

/* ---------- 响应式 ---------- */
@media (min-width: 560px) {
  .page-products .feat-metrics {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (min-width: 760px) {
  .page-products .feat-next__list {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .page-products .feat-tree__node:nth-child(2) { margin-left: 6%; }
  .page-products .feat-tree__node:nth-child(3) { margin-left: 12%; }
  .page-products .feat-tree__node:nth-child(4) { margin-left: 18%; }
  .page-products .feat-tree__node:nth-child(5) { margin-left: 24%; }
  .page-products .feat-tree__node:nth-child(6) { margin-left: 30%; }
}

@media (min-width: 860px) {
  .page-products .feat-cap__body {
    grid-template-columns: minmax(0, 1.05fr) minmax(0, .95fr);
    align-items: start;
  }

  .page-products .feat-cap__body--flip .feat-cap__text {
    order: 2;
  }

  .page-products .feat-cap__body--flip .feat-cap__media {
    order: 1;
  }
}

@media (min-width: 900px) {
  .page-products .feat-path__grid {
    grid-template-columns: 210px minmax(0, 1fr);
    align-items: start;
  }

  .page-products .feat-path__index {
    position: sticky;
    top: 120px;
  }

  .page-products .feat-path__index-list {
    flex-direction: column;
    overflow: visible;
  }

  .page-products .feat-path__index-link {
    border-radius: var(--radius-sm);
    white-space: normal;
  }
}

@media (min-width: 960px) {
  .page-products .feat-hero__inner {
    grid-template-columns: minmax(0, 1.08fr) minmax(0, .92fr);
    align-items: end;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-products .feat-tree__node a,
  .page-products .feat-next__list a,
  .page-products .feat-next__list a::after,
  .page-products .feat-inline {
    transition: color var(--dur) var(--ease), background var(--dur) var(--ease), border-color var(--dur) var(--ease);
  }

  .page-products .feat-tree__node a:hover,
  .page-products .feat-tree__node a:focus-visible {
    transform: none;
  }
}