/* V3 inner pages and multi-level navigation. */

.changhe-site-v3:not(.changhe-home-v3) {
  background: var(--v3-paper);
  color: var(--v3-ink);
}

.changhe-site-v3 .v3-header__inner {
  position: relative;
}

.v3-menu-item__top {
  display: flex;
  align-items: center;
  gap: 3px;
}

.v3-submenu-toggle {
  display: inline-flex;
  width: 20px;
  height: 32px;
  align-items: center;
  justify-content: center;
  padding: 0;
  border: 0;
  background: transparent;
  color: rgba(255, 255, 255, 0.58);
  cursor: pointer;
  font-size: 0.8rem;
  transition: color 160ms ease, transform 160ms ease;
}

.v3-menu-item--has-children:hover .v3-submenu-toggle,
.v3-menu-item--has-children:focus-within .v3-submenu-toggle {
  color: var(--v3-orange);
  transform: rotate(180deg);
}

.v3-mega {
  position: absolute;
  top: calc(100% + 1px);
  right: 0;
  left: 0;
  display: grid;
  visibility: hidden;
  gap: 42px;
  padding: 34px 36px 38px;
  background: rgba(16, 16, 17, 0.985);
  box-shadow: 0 28px 60px rgba(0, 0, 0, 0.28);
  opacity: 0;
  transform: translateY(12px);
  grid-template-columns: minmax(210px, 0.65fr) minmax(0, 1.7fr);
  transition: opacity 170ms ease, transform 170ms ease, visibility 170ms ease;
}

.v3-menu-item--has-children:hover > .v3-mega,
.v3-menu-item--has-children:focus-within > .v3-mega,
.v3-menu-item--has-children.is-submenu-open > .v3-mega {
  visibility: visible;
  opacity: 1;
  transform: translateY(0);
}

.v3-mega__intro {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  padding-right: 34px;
  border-right: 1px solid rgba(255, 255, 255, 0.15);
}

.v3-mega__intro small {
  color: var(--v3-orange);
  font-family: Arial, sans-serif;
  font-size: 0.62rem;
  font-weight: 700;
  letter-spacing: 0.15em;
}

.v3-mega__intro strong {
  margin-top: 14px;
  color: var(--v3-white);
  font-size: clamp(1.35rem, 1.8vw, 2rem);
  line-height: 1.2;
}

.v3-mega__intro > a {
  display: flex;
  width: 100%;
  align-items: center;
  justify-content: space-between;
  padding: 12px 0;
  margin-top: auto;
  border-top: 1px solid rgba(255, 255, 255, 0.2);
  border-bottom: 1px solid rgba(255, 255, 255, 0.2);
  color: var(--v3-white) !important;
  font-size: 0.76rem !important;
  text-decoration: none;
}

.v3-mega__links {
  display: grid;
  align-content: start;
  gap: 0 26px;
}

.v3-mega__links--2 {
  grid-template-columns: repeat(2, minmax(0, 1fr));
}

.v3-nav .v3-mega__links > a {
  display: grid;
  min-height: 48px;
  align-items: center;
  gap: 10px;
  padding: 10px 3px;
  border-bottom: 1px solid rgba(255, 255, 255, 0.12);
  color: rgba(255, 255, 255, 0.82);
  font-size: 0.78rem;
  text-decoration: none;
  grid-template-columns: 24px 1fr;
  transition: color 140ms ease, padding 140ms ease;
}

.v3-nav .v3-mega__links > a:hover {
  padding-inline: 10px 2px;
  color: var(--v3-white);
}

.v3-mega__links > a span {
  color: var(--v3-orange);
  font-family: Arial, sans-serif;
  font-size: 0.58rem;
}

.v3-nav .v3-mega a::after {
  display: none;
}

.v3-page {
  overflow: hidden;
  background: var(--v3-paper);
}

.v3-inner-hero {
  position: relative;
  min-height: 540px;
  overflow: hidden;
  isolation: isolate;
  background: var(--v3-black);
  color: var(--v3-white);
}

.v3-inner-hero__image,
.v3-inner-hero__veil {
  position: absolute;
  z-index: -2;
  inset: 0;
  width: 100%;
  height: 100%;
}

.v3-inner-hero__image {
  object-fit: cover;
  object-position: center 52%;
}

.v3-inner-hero__image--products {
  object-position: center 56%;
}

.v3-inner-hero--amphibious-series,
.v3-inner-hero--amphibious-series .v3-inner-hero__inner {
  min-height: 510px;
}

.v3-inner-hero--amphibious-series .v3-inner-hero__image {
  object-position: center 58%;
}

.v3-inner-hero--amphibious-series .v3-inner-hero__veil {
  background:
    linear-gradient(90deg, rgba(10, 10, 11, 0.88) 0%, rgba(10, 10, 11, 0.58) 46%, rgba(10, 10, 11, 0.12) 82%),
    linear-gradient(0deg, rgba(10, 10, 11, 0.7) 0%, transparent 54%);
}

.v3-inner-hero__image--missing {
  display: flex;
  align-items: center;
  justify-content: flex-end;
  padding: 9% 8%;
  background:
    linear-gradient(rgba(255, 107, 0, 0.09) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255, 107, 0, 0.09) 1px, transparent 1px),
    radial-gradient(circle at 76% 48%, rgba(255, 107, 0, 0.19), transparent 27%),
    #141416;
  background-size: 44px 44px, 44px 44px, auto, auto;
}

.v3-inner-hero__image--missing > span {
  display: flex;
  align-items: flex-end;
  flex-direction: column;
  gap: 10px;
  color: rgba(255, 255, 255, 0.54);
  text-align: right;
}

.v3-inner-hero__image--missing small {
  color: var(--v3-orange);
  font-family: Arial, sans-serif;
  font-size: 0.6rem;
  font-weight: 700;
  letter-spacing: 0.13em;
}

.v3-inner-hero__image--missing strong {
  color: var(--v3-white);
  font-size: clamp(1.5rem, 3vw, 2.8rem);
}

.v3-inner-hero__image--missing em {
  font-size: 0.72rem;
  font-style: normal;
}

.v3-inner-hero__veil {
  z-index: -1;
  background:
    linear-gradient(90deg, rgba(10, 10, 11, 0.9) 0%, rgba(10, 10, 11, 0.69) 44%, rgba(10, 10, 11, 0.2) 80%),
    linear-gradient(0deg, rgba(10, 10, 11, 0.76) 0%, transparent 54%);
}

.v3-inner-hero__inner {
  display: flex;
  min-height: 540px;
  flex-direction: column;
  padding-top: 116px;
}

.v3-breadcrumbs {
  display: flex;
  align-items: center;
  gap: 9px;
  color: rgba(255, 255, 255, 0.48);
  font-size: 0.7rem;
}

.v3-breadcrumbs a {
  color: inherit;
  text-decoration: none;
}

.v3-breadcrumbs a:hover {
  color: var(--v3-white);
}

.v3-inner-hero__copy {
  max-width: 990px;
  margin-top: auto;
  padding: 42px 0 44px;
}

.v3-inner-hero__copy h1 {
  max-width: 1050px;
  margin: 0;
  color: var(--v3-white);
  font-size: clamp(2.7rem, 5vw, 5.8rem);
  font-weight: 750;
  line-height: 1.04;
  letter-spacing: -0.055em;
}

.v3-inner-hero__copy > p:last-child {
  max-width: 760px;
  margin: 20px 0 0;
  color: rgba(255, 255, 255, 0.7);
  font-size: clamp(0.92rem, 1.2vw, 1.08rem);
  line-height: 1.8;
}

.v3-inner-hero__foot {
  display: flex;
  min-height: 62px;
  align-items: center;
  justify-content: space-between;
  gap: 28px;
  border-top: 1px solid rgba(255, 255, 255, 0.2);
  color: rgba(255, 255, 255, 0.57);
  font-size: 0.7rem;
}

.v3-inner-hero__foot span:first-child,
.v3-inner-hero__foot strong {
  color: var(--v3-orange);
  font-weight: 700;
}

.v3-page-section,
.v3-catalog-group {
  padding: clamp(66px, 5.7vw, 90px) 0;
  scroll-margin-top: 90px;
}

.v3-page-section {
  background: var(--v3-white);
}

.v3-page-section--intro,
.v3-catalog-group--paper,
.v3-related {
  background: var(--v3-paper);
}

.v3-page-section--dark {
  background: var(--v3-black);
  color: var(--v3-white);
}

.v3-product-directory {
  padding: clamp(64px, 5.5vw, 86px) 0;
  background: var(--v3-paper);
}

.v3-product-directory__head {
  display: grid;
  align-items: end;
  gap: 52px;
  padding-bottom: 34px;
  border-bottom: 1px solid var(--v3-line);
  grid-template-columns: minmax(0, 1.1fr) minmax(320px, 0.9fr);
}

.v3-product-directory__head h2 {
  margin: 15px 0 0;
  color: var(--v3-ink);
  font-size: clamp(2.2rem, 4vw, 4.5rem);
  line-height: 1.02;
  letter-spacing: -0.055em;
}

.v3-product-directory__head > p {
  max-width: 620px;
  margin: 0;
  color: var(--v3-text);
  font-size: 0.88rem;
  line-height: 1.8;
}

.v3-product-directory__grid {
  display: grid;
  gap: 1px;
  padding-top: 1px;
  background: var(--v3-line);
  grid-template-columns: repeat(2, minmax(0, 1fr));
}

.v3-product-directory__subhead {
  display: grid;
  align-items: end;
  gap: 24px 52px;
  padding: 48px 0 26px;
  border-bottom: 1px solid var(--v3-line);
  grid-template-columns: minmax(0, 0.85fr) minmax(280px, 1.15fr);
}

.v3-product-directory__subhead .v3-section-marker {
  grid-column: 1 / -1;
  margin-bottom: -6px;
}

.v3-product-directory__subhead h3 {
  margin: 0;
  color: var(--v3-ink);
  font-size: clamp(1.8rem, 3vw, 3.2rem);
  line-height: 1.08;
  letter-spacing: -0.045em;
}

.v3-product-directory__subhead > p:last-child {
  max-width: 620px;
  margin: 0;
  color: var(--v3-text);
  font-size: 0.82rem;
  line-height: 1.75;
}

.v3-product-directory__grid--support {
  grid-template-columns: repeat(2, minmax(0, 1fr));
}

.v3-product-directory__item {
  position: relative;
  display: grid;
  min-height: 194px;
  gap: 21px;
  padding: 28px 26px 58px;
  background: var(--v3-white);
  color: var(--v3-ink);
  text-decoration: none;
  grid-template-columns: 28px 1fr;
  transition: background 160ms ease, color 160ms ease;
}

.v3-product-directory__item > span,
.v3-product-directory__item small,
.v3-product-directory__item em {
  font-family: Arial, sans-serif;
  font-style: normal;
}

.v3-product-directory__item > span {
  color: var(--v3-orange-dark);
  font-size: 0.66rem;
  font-weight: 700;
}

.v3-product-directory__item small {
  display: block;
  color: var(--v3-muted);
  font-size: 0.58rem;
  font-weight: 700;
  letter-spacing: 0.1em;
}

.v3-product-directory__item strong {
  display: block;
  margin-top: 10px;
  font-size: clamp(1.24rem, 1.65vw, 1.7rem);
  line-height: 1.2;
}

.v3-product-directory__item p {
  margin: 13px 0 0;
  color: var(--v3-text);
  font-size: 0.76rem;
  line-height: 1.65;
}

.v3-product-directory__item-foot {
  position: absolute;
  right: 24px;
  bottom: 20px;
  left: 75px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 18px;
}

.v3-product-directory__item-foot em,
.v3-product-directory__item-foot b {
  color: var(--v3-muted);
  font-family: Arial, sans-serif;
  font-size: 0.62rem;
  font-weight: 700;
  font-style: normal;
}

.v3-product-directory__item-foot b {
  color: var(--v3-ink);
}

.v3-product-directory__item:hover {
  background: var(--v3-orange);
  color: var(--v3-black);
}

.v3-product-directory__item:hover > span,
.v3-product-directory__item:hover small,
.v3-product-directory__item:hover p,
.v3-product-directory__item:hover em,
.v3-product-directory__item:hover b {
  color: var(--v3-black);
}

.v3-product-directory__item--support {
  min-height: 174px;
  background: #f4f2ed;
}

.v3-custom-direction-card {
  scroll-margin-top: 110px;
}

.v3-custom-direction-card .v3-amphi-model-card__media {
  margin: 0;
}

.v3-custom-direction-card .v3-amphi-model-card__body {
  min-height: 238px;
}

.v3-custom-direction-card .v3-amphi-model-card__body > small {
  display: block;
  margin-top: 17px;
  color: var(--v3-muted);
  font-size: 0.65rem;
  line-height: 1.65;
}

.v3-custom-maturity {
  display: grid;
  gap: 1px;
  margin-top: 28px;
  background: #d7d4ce;
  grid-template-columns: repeat(4, minmax(0, 1fr));
}

.v3-custom-maturity article {
  min-height: 198px;
  padding: 24px;
  background: #f3f1ed;
}

.v3-custom-maturity article.is-current {
  background: var(--v3-black);
  color: var(--v3-white);
}

.v3-custom-maturity small,
.v3-custom-maturity em {
  display: block;
  color: var(--v3-orange-dark);
  font-family: Arial, sans-serif;
  font-size: 0.61rem;
  font-style: normal;
  letter-spacing: 0.08em;
}

.v3-custom-maturity strong {
  display: block;
  margin-top: 20px;
  font-size: 1.25rem;
}

.v3-custom-maturity p {
  min-height: 66px;
  margin: 12px 0 18px;
  color: var(--v3-muted);
  font-size: 0.76rem;
  line-height: 1.65;
}

.v3-custom-maturity article.is-current p {
  color: rgba(255, 255, 255, 0.62);
}

.v3-custom-direction-card .v3-evidence-placeholder--custom {
  display: flex;
  width: 100%;
  height: 100%;
  align-items: center;
  justify-content: center;
  flex-direction: column;
  gap: 10px;
  padding: 42px;
  background:
    linear-gradient(rgba(255, 107, 0, 0.08) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255, 107, 0, 0.08) 1px, transparent 1px),
    #19191b;
  background-size: 32px 32px;
  color: rgba(255, 255, 255, 0.72);
  text-align: center;
}

.v3-custom-direction-card .v3-evidence-placeholder--custom > small {
  position: static;
  min-width: 0;
  padding: 0;
  background: transparent;
  color: var(--v3-orange);
  font-family: Arial, sans-serif;
  font-size: 0.58rem;
  font-weight: 700;
  letter-spacing: 0.13em;
}

.v3-custom-direction-card .v3-evidence-placeholder--custom > strong {
  color: var(--v3-white);
  font-size: clamp(1.25rem, 2vw, 1.9rem);
}

.v3-custom-direction-card .v3-evidence-placeholder--custom > p {
  max-width: 420px;
  margin: 0;
  color: rgba(255, 255, 255, 0.52);
  font-size: 0.7rem;
  line-height: 1.65;
}

.v3-amphi-overview,
.v3-amphi-chooser,
.v3-amphi-models,
.v3-amphi-config,
.v3-platform-types,
.v3-amphi-media,
.v3-amphi-related,
.v3-amphi-action {
  padding: clamp(68px, 6vw, 96px) 0;
}

.v3-amphi-overview {
  background: var(--v3-white);
}

.v3-amphi-chooser {
  background: var(--v3-white);
}

.v3-amphi-scenario-grid {
  display: grid;
  gap: 2px;
  margin-top: 34px;
  background: var(--v3-line);
  grid-template-columns: repeat(2, minmax(0, 1fr));
}

.v3-amphi-scenario-grid > a {
  position: relative;
  display: block;
  aspect-ratio: 16 / 8.4;
  overflow: hidden;
  background: #1a1a1b;
  color: var(--v3-white);
  text-decoration: none;
}

.v3-amphi-scenario-grid img,
.v3-amphi-scenario-grid__veil {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
}

.v3-amphi-scenario-grid img {
  object-fit: cover;
  transition: transform 360ms ease;
}

.v3-amphi-scenario-grid > a:hover img {
  transform: scale(1.025);
}

.v3-amphi-scenario-grid__veil {
  background: linear-gradient(0deg, rgba(8, 8, 9, 0.88) 0%, rgba(8, 8, 9, 0.12) 70%);
}

.v3-amphi-scenario-grid small {
  position: absolute;
  top: 22px;
  left: 24px;
  color: var(--v3-orange);
  font-family: Arial, sans-serif;
  font-size: 0.61rem;
  font-weight: 700;
  letter-spacing: 0.1em;
}

.v3-amphi-scenario-grid > a > div {
  position: absolute;
  right: 24px;
  bottom: 22px;
  left: 24px;
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  gap: 18px;
}

.v3-amphi-scenario-grid strong {
  max-width: 70%;
  font-size: clamp(1.25rem, 2vw, 2rem);
  line-height: 1.25;
}

.v3-amphi-scenario-grid em {
  color: rgba(255, 255, 255, 0.78);
  font-size: 0.7rem;
  font-style: normal;
  white-space: nowrap;
}

.v3-amphi-scenario-grid b {
  margin-left: 8px;
  color: var(--v3-orange);
}

.v3-amphi-overview__grid,
.v3-amphi-section-head,
.v3-amphi-action__grid {
  display: grid;
  align-items: end;
  gap: clamp(44px, 7vw, 110px);
  grid-template-columns: minmax(0, 1.1fr) minmax(320px, 0.9fr);
}

.v3-amphi-overview h2,
.v3-amphi-section-head h2,
.v3-amphi-action h2 {
  margin: 15px 0 0;
  font-size: clamp(2.3rem, 4.5vw, 5rem);
  line-height: 1.02;
  letter-spacing: -0.055em;
}

.v3-amphi-overview__copy > p,
.v3-amphi-section-head > p,
.v3-amphi-action p {
  max-width: 650px;
  margin: 0;
  color: var(--v3-text);
  font-size: 0.86rem;
  line-height: 1.85;
}

.v3-amphi-overview__copy .v3-list-card__link {
  margin-top: 24px;
}

.v3-amphi-signals {
  display: grid;
  margin-top: 52px;
  border-top: 1px solid var(--v3-line);
  border-bottom: 1px solid var(--v3-line);
  grid-template-columns: repeat(4, minmax(0, 1fr));
}

.v3-amphi-signals > div {
  min-height: 150px;
  padding: 24px 22px;
  border-right: 1px solid var(--v3-line);
}

.v3-amphi-signals > div:last-child {
  border-right: 0;
}

.v3-amphi-signals span,
.v3-amphi-config__grid span,
.v3-amphi-related__grid span {
  display: block;
  margin-bottom: 27px;
  color: var(--v3-orange-dark);
  font-family: Arial, sans-serif;
  font-size: 0.64rem;
  font-weight: 700;
}

.v3-amphi-signals strong,
.v3-amphi-config__grid strong {
  display: block;
  color: var(--v3-ink);
  font-size: 1rem;
}

.v3-amphi-signals small {
  display: block;
  margin-top: 9px;
  color: var(--v3-muted);
  font-size: 0.72rem;
  line-height: 1.6;
}

.v3-amphi-models {
  scroll-margin-top: 88px;
  background: var(--v3-paper);
}

.v3-amphi-section-head {
  padding-bottom: 38px;
  border-bottom: 1px solid var(--v3-line);
}

.v3-amphi-section-head h2 {
  font-size: clamp(2.25rem, 4vw, 4.5rem);
}

.v3-amphi-model-nav {
  display: flex;
  gap: 0;
  margin: 26px 0 38px;
  overflow-x: auto;
  border-top: 1px solid var(--v3-line);
  border-bottom: 1px solid var(--v3-line);
  scrollbar-width: thin;
}

.v3-amphi-model-nav a {
  flex: 1 0 auto;
  min-width: 118px;
  padding: 15px 18px;
  border-right: 1px solid var(--v3-line);
  color: var(--v3-ink);
  font-family: Arial, sans-serif;
  font-size: 0.69rem;
  font-weight: 700;
  text-align: center;
  text-decoration: none;
}

.v3-amphi-model-nav a:hover {
  background: var(--v3-orange);
}

.v3-amphi-model-grid {
  display: grid;
  gap: 22px 14px;
  grid-template-columns: repeat(4, minmax(0, 1fr));
}

.v3-amphi-model-grid--3 {
  grid-template-columns: repeat(3, minmax(0, 1fr));
}

.v3-amphi-model-grid--2 {
  grid-template-columns: repeat(2, minmax(0, 1fr));
}

.v3-amphi-model-card {
  min-width: 0;
  background: var(--v3-white);
}

.v3-amphi-model-card__media {
  position: relative;
  display: block;
  aspect-ratio: 4 / 3;
  overflow: hidden;
  background: #dedbd5;
}

.v3-amphi-model-card__media img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 320ms ease;
}

.v3-amphi-model-card--river35 .v3-amphi-model-card__media img {
  object-position: center 54%;
}

.v3-amphi-model-card--river215 .v3-amphi-model-card__media img,
.v3-amphi-model-card--river250 .v3-amphi-model-card__media img {
  object-position: center 58%;
}

.v3-amphi-model-card--river300 .v3-amphi-model-card__media img {
  object-position: center 52%;
}

.v3-amphi-model-card:hover .v3-amphi-model-card__media img {
  transform: scale(1.025);
}

.v3-amphi-model-card__media span {
  position: absolute;
  top: 14px;
  left: 14px;
  min-width: 30px;
  padding: 7px 8px;
  background: rgba(15, 15, 16, 0.84);
  color: var(--v3-orange);
  font-family: Arial, sans-serif;
  font-size: 0.62rem;
  font-weight: 700;
  text-align: center;
}

.v3-amphi-model-card__body {
  padding: 19px 19px 17px;
}

.v3-amphi-model-card__body > div {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
}

.v3-amphi-model-card__body small,
.v3-amphi-model-card__body em {
  color: var(--v3-orange-dark);
  font-family: Arial, sans-serif;
  font-size: 0.6rem;
  font-style: normal;
  font-weight: 700;
}

.v3-amphi-model-card__body em {
  color: var(--v3-muted);
}

.v3-amphi-model-card h3 {
  margin: 14px 0 0;
  font-size: clamp(1.18rem, 1.55vw, 1.55rem);
  line-height: 1.25;
}

.v3-amphi-model-card h3 a {
  color: var(--v3-ink);
  text-decoration: none;
}

.v3-amphi-model-card p {
  min-height: 3.4em;
  margin: 10px 0 0;
  color: var(--v3-text);
  font-size: 0.74rem;
  line-height: 1.7;
}

/* Undercarriage series only: retain the shared visual system, clarify hierarchy. */
.v3-under-group + .v3-under-group {
  margin-top: 40px;
}

.v3-under-group__head {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 10px 20px;
  margin-bottom: 18px;
}

.v3-under-group__head h3 {
  margin: 0;
  font-size: 1.12rem;
}

.v3-under-group__head p {
  margin: 0;
  color: var(--v3-muted);
  font-size: 0.72rem;
}

.v3-under-products .v3-amphi-model-card {
  display: flex;
  flex-direction: column;
  scroll-margin-top: 100px;
}

.v3-under-products .v3-amphi-model-card__media img {
  object-fit: contain;
}

.v3-under-products .v3-amphi-model-card__body {
  display: flex;
  flex: 1;
  flex-direction: column;
}

.v3-under-products .v3-amphi-model-card h4 {
  min-height: 2.5em;
  margin: 14px 0 0;
  font-size: clamp(1.18rem, 1.55vw, 1.55rem);
  line-height: 1.25;
}

.v3-under-products .v3-amphi-model-card h4 a {
  color: var(--v3-ink);
  text-decoration: none;
}

.v3-under-products .v3-list-card__link {
  margin-top: auto;
  padding-top: 18px;
}

.v3-under-group--parts {
  padding-top: 26px;
  border-top: 1px solid var(--v3-line);
}

.v3-under-group--parts .v3-amphi-model-card {
  display: grid;
  grid-template-columns: 100px minmax(0, 1fr);
}

.v3-under-group--parts .v3-amphi-model-card__media {
  align-self: start;
  aspect-ratio: 1;
  margin-top: 16px;
  background: var(--v3-white);
}

.v3-under-group--parts .v3-amphi-model-card__media span {
  top: 0;
  left: 0;
  padding: 4px;
  min-width: 24px;
  font-size: 0.55rem;
}

.v3-under-group--parts .v3-amphi-model-card__body {
  padding: 16px;
}

.v3-under-group--parts .v3-amphi-model-card h4 {
  min-height: 0;
  margin-top: 0;
  font-size: 0.92rem;
  line-height: 1.4;
}

.v3-under-group--parts .v3-amphi-model-card p {
  min-height: 0;
  font-size: 0.68rem;
}

.v3-under-group--parts .v3-list-card__link {
  font-size: 0.68rem;
}

.v3-under-inputs {
  background: var(--v3-white);
}

.v3-under-inputs__grid {
  display: grid;
  gap: 14px;
  grid-template-columns: repeat(3, minmax(0, 1fr));
}

.v3-under-inputs__grid article {
  padding: 24px;
  background: var(--v3-paper);
}

.v3-under-inputs__grid span {
  color: var(--v3-orange-dark);
  font: 700 0.64rem Arial, sans-serif;
}

.v3-under-inputs__grid h3 {
  margin: 18px 0 10px;
  font-size: 1rem;
  line-height: 1.4;
}

.v3-under-inputs__grid p {
  margin: 0;
  color: var(--v3-text);
  font-size: 0.74rem;
  line-height: 1.7;
}

@media (max-width: 1100px) {
  .v3-under-group--parts .v3-amphi-model-grid {
    grid-template-columns: 1fr;
  }

  .v3-under-inputs__grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (max-width: 760px) {
  .v3-under-products .v3-amphi-model-grid {
    display: grid;
    grid-template-columns: 1fr;
    overflow: visible;
    padding-bottom: 0;
  }

  .v3-under-products .v3-amphi-model-card h4 {
    min-height: 0;
  }

  .v3-under-products .v3-amphi-model-card__body > div {
    flex-wrap: wrap;
  }

  .v3-under-inputs__grid {
    grid-template-columns: 1fr;
  }
}

.v3-amphi-config {
  background: var(--v3-black);
  color: var(--v3-white);
}

.v3-amphi-section-head--light {
  border-color: rgba(255, 255, 255, 0.16);
}

.v3-amphi-section-head--light h2 {
  color: var(--v3-white);
}

.v3-amphi-section-head--light > p {
  color: rgba(255, 255, 255, 0.58);
}

.v3-amphi-config__grid {
  display: grid;
  margin-top: 1px;
  background: rgba(255, 255, 255, 0.16);
  grid-template-columns: repeat(4, minmax(0, 1fr));
}

.v3-amphi-config__grid article {
  min-height: 230px;
  padding: 28px 24px;
  background: var(--v3-black);
  border-right: 1px solid rgba(255, 255, 255, 0.16);
}

.v3-amphi-config__grid article:last-child {
  border-right: 0;
}

.v3-amphi-config__grid strong {
  color: var(--v3-white);
  font-size: 1.18rem;
}

.v3-amphi-config__grid p {
  margin: 18px 0 0;
  color: rgba(255, 255, 255, 0.55);
  font-size: 0.75rem;
  line-height: 1.75;
}

.v3-amphi-config__note {
  padding-top: 19px;
  margin: 0;
  border-top: 1px solid rgba(255, 255, 255, 0.16);
  color: var(--v3-orange);
  font-size: 0.7rem;
}

.v3-amphi-config-visuals {
  display: grid;
  gap: 2px;
  margin-top: 34px;
  background: rgba(255, 255, 255, 0.15);
  grid-template-columns: repeat(3, minmax(0, 1fr));
}

.v3-amphi-config-visuals article {
  min-width: 0;
  background: #151516;
}

.v3-amphi-config-visuals figure {
  position: relative;
  margin: 0;
  overflow: hidden;
  background: #2a2a2b;
}

.v3-amphi-config-visuals img {
  display: block;
  width: 100%;
  aspect-ratio: 4 / 3;
  object-fit: cover;
  transition: transform 320ms ease;
}

.v3-amphi-config-visuals article:hover img {
  transform: scale(1.025);
}

.v3-amphi-config-visuals figure span {
  position: absolute;
  top: 14px;
  left: 14px;
  padding: 7px 9px;
  background: rgba(10, 10, 11, 0.84);
  color: var(--v3-orange);
  font-family: Arial, sans-serif;
  font-size: 0.62rem;
  font-weight: 700;
}

.v3-amphi-config-visuals article > div {
  min-height: 126px;
  padding: 21px 20px;
}

.v3-amphi-config-visuals strong {
  color: var(--v3-white);
  font-size: 1.12rem;
}

.v3-amphi-config-visuals p {
  margin: 10px 0 0;
  color: rgba(255, 255, 255, 0.56);
  font-size: 0.74rem;
  line-height: 1.65;
}

.v3-amphi-config__foot {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 28px;
  padding-top: 20px;
  margin-top: 1px;
  border-top: 1px solid rgba(255, 255, 255, 0.16);
}

.v3-amphi-config__foot p {
  margin: 0;
  color: rgba(255, 255, 255, 0.56);
  font-size: 0.72rem;
}

.v3-amphi-config__foot a {
  flex: 0 0 auto;
  color: var(--v3-orange);
  font-size: 0.7rem;
  font-weight: 700;
  text-decoration: none;
}

.v3-amphi-details__marker {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-bottom: 34px;
  margin-bottom: 44px;
  border-bottom: 1px solid var(--v3-line);
}

.v3-amphi-details__marker > span {
  color: var(--v3-muted);
  font-size: 0.72rem;
}

.v3-amphi-media {
  background: var(--v3-paper);
}

.v3-platform-types {
  background: var(--v3-white);
}

.v3-platform-type-grid {
  display: grid;
  gap: 2px;
  margin-top: 34px;
  background: var(--v3-line);
  grid-template-columns: repeat(3, minmax(0, 1fr));
}

.v3-platform-type-grid article {
  min-width: 0;
  background: var(--v3-paper);
}

.v3-platform-type-grid figure {
  position: relative;
  margin: 0;
  overflow: hidden;
  background: #d8d5cf;
}

.v3-platform-type-grid img {
  display: block;
  width: 100%;
  aspect-ratio: 4 / 3;
  object-fit: cover;
  transition: transform 320ms ease;
}

.v3-platform-type-grid article:hover img {
  transform: scale(1.02);
}

.v3-platform-type-grid figure span {
  position: absolute;
  right: 12px;
  bottom: 12px;
  padding: 7px 9px;
  background: rgba(15, 15, 16, 0.82);
  color: var(--v3-orange);
  font-family: Arial, sans-serif;
  font-size: 0.57rem;
  font-weight: 700;
  letter-spacing: 0.08em;
}

.v3-platform-type-grid article > div {
  min-height: 170px;
  padding: 21px 20px 22px;
}

.v3-platform-type-grid small {
  color: var(--v3-orange-dark);
  font-family: Arial, sans-serif;
  font-size: 0.6rem;
  font-weight: 700;
}

.v3-platform-type-grid h3 {
  margin: 13px 0 0;
  color: var(--v3-ink);
  font-size: clamp(1.08rem, 1.5vw, 1.42rem);
  line-height: 1.3;
}

.v3-platform-type-grid p {
  margin: 10px 0 0;
  color: var(--v3-text);
  font-size: 0.74rem;
  line-height: 1.7;
}

.v3-amphi-media__grid {
  display: grid;
  gap: 2px;
  margin-top: 34px;
  background: var(--v3-line);
  grid-template-columns: repeat(3, minmax(0, 1fr));
}

.v3-amphi-media__grid figure {
  position: relative;
  min-width: 0;
  margin: 0;
  overflow: hidden;
  background: #ddd9d2;
}

.v3-amphi-media__grid img {
  display: block;
  width: 100%;
  aspect-ratio: 4 / 3;
  object-fit: cover;
  transition: transform 320ms ease;
}

.v3-amphi-media__grid figure:hover img {
  transform: scale(1.02);
}

.v3-amphi-media__grid figcaption {
  position: absolute;
  right: 0;
  bottom: 0;
  left: 0;
  display: flex;
  justify-content: space-between;
  padding: 28px 15px 12px;
  background: linear-gradient(transparent, rgba(10, 10, 11, 0.82));
  color: rgba(255, 255, 255, 0.8);
  font-family: Arial, sans-serif;
  font-size: 0.61rem;
}

.v3-amphi-media__grid figcaption span {
  color: var(--v3-orange);
}

.v3-amphi-related {
  background: var(--v3-white);
}

.v3-amphi-related__grid {
  display: grid;
  margin-top: 34px;
  border-top: 1px solid var(--v3-line);
  border-bottom: 1px solid var(--v3-line);
  grid-template-columns: repeat(3, minmax(0, 1fr));
}

.v3-amphi-related__grid a {
  display: flex;
  min-height: 190px;
  flex-direction: column;
  padding: 25px 24px 20px;
  border-right: 1px solid var(--v3-line);
  color: var(--v3-ink);
  text-decoration: none;
  transition: background 160ms ease;
}

.v3-amphi-related__grid a:last-child {
  border-right: 0;
}

.v3-amphi-related__grid a:hover {
  background: var(--v3-paper);
}

.v3-amphi-related__grid strong {
  max-width: 310px;
  font-size: 1.17rem;
  line-height: 1.4;
}

.v3-amphi-related__grid em {
  padding-top: 17px;
  margin-top: auto;
  border-top: 1px solid var(--v3-line);
  color: var(--v3-orange-dark);
  font-size: 0.68rem;
  font-style: normal;
}

.v3-amphi-action {
  background: var(--v3-black);
  color: var(--v3-white);
}

.v3-amphi-action small {
  color: var(--v3-orange);
  font-family: Arial, sans-serif;
  font-size: 0.65rem;
  font-weight: 700;
  letter-spacing: 0.14em;
}

.v3-amphi-action h2 {
  color: var(--v3-white);
  font-size: clamp(2.2rem, 4vw, 4.5rem);
}

.v3-amphi-action p {
  margin-bottom: 24px;
  color: rgba(255, 255, 255, 0.58);
}

.v3-section-marker {
  margin: 0;
  color: var(--v3-orange-dark);
  font-family: Arial, sans-serif;
  font-size: 0.69rem;
  font-weight: 700;
  letter-spacing: 0.13em;
}

.v3-article-marker {
  display: grid;
  align-items: end;
  gap: 28px;
  padding-bottom: 34px;
  border-bottom: 1px solid var(--v3-line);
  grid-template-columns: minmax(150px, 0.45fr) minmax(0, 1.55fr);
}

.v3-article-marker > span {
  max-width: 690px;
  color: var(--v3-muted);
  font-size: 0.78rem;
  line-height: 1.75;
}

.v3-lead-layout {
  display: grid;
  align-items: start;
  gap: clamp(44px, 7vw, 110px);
  grid-template-columns: minmax(125px, 0.45fr) minmax(0, 1.8fr);
}

.v3-prose {
  min-width: 0;
  color: var(--v3-text);
  font-size: 0.98rem;
  line-height: 1.9;
}

.v3-prose > *:first-child {
  margin-top: 0;
}

.v3-prose > *:last-child {
  margin-bottom: 0;
}

.v3-prose--lead {
  max-width: 960px;
}

.v3-hub-principles,
.v3-library-topics,
.v3-project-policy {
  display: grid;
  margin-top: 52px;
  border-top: 1px solid var(--v3-line);
  border-bottom: 1px solid var(--v3-line);
}

.v3-hub-principles,
.v3-library-topics {
  grid-template-columns: repeat(4, minmax(0, 1fr));
}

.v3-project-policy {
  grid-template-columns: repeat(3, minmax(0, 1fr));
}

.v3-hub-principles > div,
.v3-library-topics > div,
.v3-project-policy > div {
  min-height: 132px;
  padding: 22px 20px;
  border-right: 1px solid var(--v3-line);
}

.v3-hub-principles > div:last-child,
.v3-library-topics > div:last-child,
.v3-project-policy > div:last-child {
  border-right: 0;
}

.v3-hub-principles span,
.v3-library-topics span,
.v3-project-policy span {
  display: block;
  margin-bottom: 24px;
  color: var(--v3-orange-dark);
  font-family: Arial, sans-serif;
  font-size: 0.62rem;
  font-weight: 700;
}

.v3-hub-principles strong,
.v3-library-topics strong,
.v3-project-policy strong {
  display: block;
  color: var(--v3-ink);
  font-size: 0.9rem;
  line-height: 1.45;
}

.v3-hub-principles small,
.v3-library-topics small {
  display: block;
  margin-top: 8px;
  color: var(--v3-muted);
  font-size: 0.68rem;
  line-height: 1.55;
}

.v3-prose h2 {
  padding-top: 48px;
  margin: 54px 0 20px;
  border-top: 1px solid var(--v3-line);
  color: var(--v3-ink);
  font-size: clamp(1.75rem, 2.8vw, 3rem);
  line-height: 1.2;
  letter-spacing: -0.035em;
}

.v3-prose h2:first-child {
  padding-top: 0;
  margin-top: 0;
  border-top: 0;
}

.v3-prose h3 {
  margin: 34px 0 12px;
  color: var(--v3-ink);
  font-size: 1.28rem;
}

.v3-prose p,
.v3-prose ul,
.v3-prose ol {
  margin: 0 0 20px;
}

.v3-prose ul,
.v3-prose ol {
  padding-left: 1.3rem;
}

.v3-prose li {
  margin: 8px 0;
}

.v3-prose a {
  color: var(--v3-orange-dark);
}

.v3-prose blockquote {
  padding: 24px 28px;
  margin: 30px 0;
  border-left: 4px solid var(--v3-orange);
  background: var(--v3-paper);
}

.v3-prose code {
  padding: 0.16em 0.36em;
  background: #ebe7e0;
  color: var(--v3-ink);
  font-size: 0.85em;
}

.v3-prose--legal {
  max-width: 850px;
}

.v3-prose--timeline {
  position: relative;
}

.v3-prose--timeline h2 {
  padding: 26px 0 0 28px;
  border-top: 0;
  border-left: 3px solid var(--v3-orange);
}

.v3-prose--timeline h2 + p,
.v3-prose--timeline h2 + ul {
  padding: 0 0 34px 31px;
  border-left: 1px solid var(--v3-line);
}

.v3-prose--faq h2 {
  padding: 24px 26px 0;
  margin-top: 22px;
  border: 1px solid var(--v3-line);
  border-bottom: 0;
  background: var(--v3-white);
  font-size: 1.35rem;
}

.v3-prose--faq h2 + p,
.v3-prose--faq h2 + ul,
.v3-prose--faq h2 + ol {
  padding: 12px 26px 25px;
  margin-bottom: 0;
  border: 1px solid var(--v3-line);
  border-top: 0;
  background: var(--v3-white);
}

.v3-base-media {
  display: grid;
  gap: 2px;
  padding-bottom: clamp(42px, 6vw, 78px);
  grid-template-columns: repeat(3, minmax(0, 1fr));
}

.v3-base-media figure {
  position: relative;
  min-width: 0;
  margin: 0;
  overflow: hidden;
  background: var(--v3-ink);
}

.v3-base-media img {
  display: block;
  width: 100%;
  aspect-ratio: 4 / 3;
  object-fit: cover;
  transition: transform 300ms ease;
}

.v3-base-media figure:hover img {
  transform: scale(1.025);
}

.v3-base-media figcaption {
  position: absolute;
  right: 0;
  bottom: 0;
  left: 0;
  display: flex;
  justify-content: space-between;
  padding: 30px 16px 12px;
  background: linear-gradient(transparent, rgba(5, 11, 15, 0.82));
  color: rgba(255, 255, 255, 0.8);
  font-family: Arial, sans-serif;
  font-size: 0.62rem;
  letter-spacing: 0.08em;
}

.v3-base-media figcaption span {
  color: var(--v3-orange);
}

.v3-prose .table-scroll {
  max-width: 100%;
  margin: 28px 0;
  overflow-x: auto;
  border-top: 2px solid var(--v3-ink);
}

.v3-prose table {
  width: 100%;
  min-width: 620px;
  border-collapse: collapse;
  background: var(--v3-white);
  font-size: 0.82rem;
}

.v3-prose th,
.v3-prose td {
  padding: 14px 15px;
  border-bottom: 1px solid var(--v3-line);
  text-align: left;
  vertical-align: top;
}

.v3-prose th {
  background: var(--v3-ink);
  color: var(--v3-white);
  font-weight: 700;
}

.v3-group-head {
  display: grid;
  align-items: end;
  gap: 28px;
  margin-bottom: 42px;
  grid-template-columns: 46px 1fr auto;
}

.v3-group-head > span {
  color: var(--v3-orange-dark);
  font-family: Arial, sans-serif;
  font-size: 0.7rem;
  font-weight: 700;
}

.v3-group-head small {
  color: var(--v3-muted);
  font-family: Arial, sans-serif;
  font-size: 0.63rem;
  font-weight: 700;
  letter-spacing: 0.14em;
}

.v3-group-head h2 {
  margin: 8px 0 0;
  color: var(--v3-ink);
  font-size: clamp(2rem, 3.3vw, 3.8rem);
  line-height: 1.12;
  letter-spacing: -0.045em;
}

.v3-group-head em {
  padding-bottom: 8px;
  color: var(--v3-muted);
  font-size: 0.72rem;
  font-style: normal;
}

.v3-group-head__copy p {
  max-width: 720px;
  margin: 14px 0 0;
  color: var(--v3-text);
  font-size: 0.78rem;
  line-height: 1.7;
}

.v3-group-head__actions {
  display: flex;
  align-items: flex-end;
  flex-direction: column;
  gap: 12px;
  padding-bottom: 8px;
}

.v3-group-head__actions em {
  padding-bottom: 0;
}

.v3-group-head__actions a {
  border-bottom: 1px solid var(--v3-ink);
  color: var(--v3-ink);
  font-size: 0.7rem;
  font-weight: 700;
  text-decoration: none;
}

.v3-group-head--light h2 {
  color: var(--v3-white);
}

.v3-group-head--light small,
.v3-group-head--light em {
  color: rgba(255, 255, 255, 0.5);
}

.v3-card-grid {
  display: grid;
  gap: 44px 18px;
}

.v3-card-grid--3 {
  grid-template-columns: repeat(3, minmax(0, 1fr));
}

.v3-card-grid--2 {
  grid-template-columns: repeat(2, minmax(0, 1fr));
}

.v3-list-card {
  min-width: 0;
}

.v3-list-card__media {
  position: relative;
  display: block;
  aspect-ratio: 4 / 3;
  overflow: hidden;
  background: #e6e2dc;
}

.v3-list-card__media img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 420ms ease;
}

.v3-list-card--river300 .v3-list-card__media img {
  object-position: 28% center;
}

.v3-list-card--rs60 .v3-list-card__media img {
  object-position: 43% center;
}

.v3-list-card__media--missing {
  display: grid;
  place-items: center;
  background:
    linear-gradient(135deg, rgba(16, 16, 17, 0.035) 25%, transparent 25%) 0 0 / 24px 24px,
    linear-gradient(315deg, rgba(16, 16, 17, 0.035) 25%, transparent 25%) 0 0 / 24px 24px,
    #e7e3dc;
}

.v3-list-card__missing-copy {
  padding: 30px;
  color: var(--v3-muted);
  text-align: center;
}

.v3-list-card__missing-copy small,
.v3-list-card__missing-copy strong {
  display: block;
}

.v3-list-card__missing-copy small {
  font-family: Arial, sans-serif;
  font-size: 0.56rem;
  font-weight: 700;
  letter-spacing: 0.12em;
}

.v3-list-card__missing-copy strong {
  margin-top: 10px;
  color: var(--v3-ink);
  font-size: 1.15rem;
}

.v3-list-card:hover .v3-list-card__media img {
  transform: scale(1.025);
}

.v3-list-card__tag,
.v3-concept-label {
  position: absolute;
  top: 16px;
  left: 16px;
  padding: 6px 8px;
  background: rgba(16, 16, 17, 0.82);
  color: var(--v3-white);
  font-family: Arial, sans-serif;
  font-size: 0.62rem;
  font-weight: 700;
  letter-spacing: 0.08em;
}

.v3-concept-label {
  top: auto;
  bottom: 16px;
  background: var(--v3-orange);
  color: var(--v3-black);
}

.v3-list-card__body {
  padding-top: 18px;
}

.v3-list-card__meta {
  color: var(--v3-orange-dark);
  font-family: Arial, sans-serif;
  font-size: 0.6rem;
  font-weight: 700;
  letter-spacing: 0.13em;
}

.v3-list-card h2 {
  margin: 8px 0 0;
  font-size: clamp(1.18rem, 1.55vw, 1.6rem);
  line-height: 1.3;
}

.v3-list-card h2 a {
  color: var(--v3-ink);
  text-decoration: none;
}

.v3-list-card p {
  display: -webkit-box;
  margin: 10px 0 0;
  overflow: hidden;
  color: var(--v3-text);
  font-size: 0.8rem;
  line-height: 1.7;
  -webkit-box-orient: vertical;
  -webkit-line-clamp: 3;
}

.v3-list-card__link {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 12px 0;
  margin-top: 15px;
  border-top: 1px solid var(--v3-line);
  border-bottom: 1px solid var(--v3-line);
  color: var(--v3-ink);
  font-size: 0.75rem;
  font-weight: 700;
  text-decoration: none;
}

.v3-list-card__link span {
  color: var(--v3-orange-dark);
}

.v3-page-section--dark .v3-list-card h2 a,
.v3-page-section--dark .v3-list-card__link {
  color: var(--v3-white);
}

.v3-page-section--dark .v3-list-card p {
  color: rgba(255, 255, 255, 0.6);
}

.v3-page-section--dark .v3-list-card__link {
  border-color: rgba(255, 255, 255, 0.18);
}

.v3-detail-summary {
  padding: 42px 0;
  background: var(--v3-white);
}

.v3-detail-summary__grid {
  display: grid;
  gap: clamp(44px, 7vw, 110px);
  grid-template-columns: minmax(125px, 0.45fr) minmax(0, 1.8fr);
}

.v3-detail-summary__grid > div > strong {
  display: block;
  max-width: 900px;
  color: var(--v3-ink);
  font-size: clamp(1.15rem, 2vw, 1.8rem);
  line-height: 1.55;
}

.v3-detail-facts {
  display: grid;
  gap: 0;
  margin-top: 32px;
  border-top: 1px solid var(--v3-line);
  border-bottom: 1px solid var(--v3-line);
  grid-template-columns: repeat(3, minmax(0, 1fr));
}

.v3-detail-facts span {
  display: flex;
  min-height: 84px;
  flex-direction: column;
  justify-content: center;
  padding: 14px 22px;
  border-right: 1px solid var(--v3-line);
  color: var(--v3-ink);
  font-size: 0.82rem;
}

.v3-detail-facts span:last-child {
  border-right: 0;
}

.v3-detail-facts small {
  margin-bottom: 5px;
  color: var(--v3-muted);
  font-size: 0.66rem;
}

.v3-product-showcase {
  padding: clamp(66px, 5.7vw, 90px) 0;
  background: var(--v3-black);
  color: var(--v3-white);
}

.v3-product-showcase__head {
  display: grid;
  align-items: end;
  gap: 52px;
  margin-bottom: 34px;
  grid-template-columns: minmax(0, 1.1fr) minmax(320px, 0.9fr);
}

.v3-product-showcase__head h2 {
  margin: 14px 0 0;
  color: var(--v3-white);
  font-size: clamp(2.2rem, 3.8vw, 4.2rem);
  line-height: 1.05;
  letter-spacing: -0.05em;
}

.v3-product-showcase__head > p {
  max-width: 610px;
  margin: 0;
  color: rgba(255, 255, 255, 0.58);
  font-size: 0.8rem;
  line-height: 1.75;
}

.v3-product-showcase__layout {
  display: grid;
  align-items: stretch;
  gap: 18px;
  grid-template-columns: minmax(0, 1.65fr) minmax(280px, 0.55fr);
}

.v3-product-gallery {
  display: grid;
  min-height: 540px;
  gap: 2px;
  background: rgba(255, 255, 255, 0.12);
  grid-template-columns: minmax(0, 1.8fr) minmax(220px, 0.72fr);
  grid-template-rows: repeat(2, minmax(0, 1fr));
}

.v3-product-gallery figure {
  position: relative;
  min-width: 0;
  margin: 0;
  overflow: hidden;
  background: #242426;
}

.v3-product-gallery__main {
  grid-row: 1 / 3;
}

.v3-product-gallery figure > a {
  position: absolute;
  inset: 0;
  display: block;
}

.v3-product-gallery figure img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 320ms ease;
}

.v3-product-gallery figure > a > span {
  position: absolute;
  z-index: 2;
  top: 16px;
  right: 16px;
  padding: 7px 9px;
  background: rgba(16, 16, 17, 0.78);
  color: var(--v3-white);
  font-size: 0.62rem;
  opacity: 0;
  transition: opacity 160ms ease;
}

.v3-product-gallery figure:hover img {
  transform: scale(1.018);
}

.v3-product-gallery figure:hover > a > span {
  opacity: 1;
}

.v3-product-gallery figcaption {
  position: absolute;
  z-index: 2;
  right: 0;
  bottom: 0;
  left: 0;
  display: flex;
  gap: 13px;
  padding: 30px 18px 15px;
  background: linear-gradient(0deg, rgba(10, 10, 11, 0.82), transparent);
  color: var(--v3-white);
  font-size: 0.72rem;
  pointer-events: none;
}

.v3-product-gallery figcaption small {
  color: var(--v3-orange);
  font-family: Arial, sans-serif;
}

.v3-product-gallery--count-1 {
  grid-template-columns: 1fr;
}

.v3-product-gallery--count-1 .v3-product-gallery__main {
  grid-row: 1 / 3;
}

.v3-product-gallery--count-2 {
  grid-template-columns: repeat(2, minmax(0, 1fr));
  grid-template-rows: 1fr;
}

.v3-product-gallery--count-2 .v3-product-gallery__main {
  grid-row: auto;
}

.v3-product-video-link {
  display: flex;
  min-height: 180px;
  flex-direction: column;
  justify-content: center;
  padding: 24px;
  background: var(--v3-orange);
  color: var(--v3-black);
  text-decoration: none;
}

.v3-product-video-link > span,
.v3-product-video-link em {
  font-family: Arial, sans-serif;
  font-size: 0.62rem;
  font-style: normal;
  font-weight: 700;
  letter-spacing: 0.1em;
}

.v3-product-video-link strong {
  margin: 12px 0 28px;
  font-size: 1.45rem;
}

.v3-product-download {
  display: flex;
  min-height: 540px;
  flex-direction: column;
  padding: 34px 30px 28px;
  background: var(--v3-paper);
  color: var(--v3-ink);
}

.v3-product-download > span {
  color: var(--v3-orange-dark);
  font-family: Arial, sans-serif;
  font-size: 0.62rem;
  font-weight: 700;
  letter-spacing: 0.13em;
}

.v3-product-download h2 {
  margin: 14px 0 13px;
  font-size: clamp(1.65rem, 2.2vw, 2.3rem);
  line-height: 1.15;
}

.v3-product-download > p,
.v3-product-download > small {
  margin: 0;
  color: var(--v3-text);
  font-size: 0.76rem;
  line-height: 1.7;
}

.v3-product-download__file {
  padding: 22px 0;
  margin: auto 0 22px;
  border-top: 2px solid var(--v3-ink);
  border-bottom: 1px solid var(--v3-line);
}

.v3-product-download__file small,
.v3-product-download__file strong {
  display: block;
}

.v3-product-download__file small {
  color: var(--v3-muted);
  font-family: Arial, sans-serif;
  font-size: 0.58rem;
  letter-spacing: 0.1em;
}

.v3-product-download__file strong {
  margin: 10px 0 22px;
  font-size: 1rem;
  line-height: 1.5;
}

.v3-product-download__file > a,
.v3-product-download__pending {
  display: flex;
  min-height: 46px;
  align-items: center;
  justify-content: space-between;
  padding: 11px 14px;
  background: var(--v3-orange);
  color: var(--v3-black);
  font-size: 0.76rem;
  font-weight: 750;
  text-decoration: none;
}

.v3-product-download__pending {
  background: #dfdbd5;
  color: #716d67;
}

.v3-solution-system {
  padding: clamp(70px, 6.5vw, 104px) 0;
  background: var(--v3-black);
  color: var(--v3-white);
}

.v3-solution-system__head,
.v3-project-evidence__head {
  display: grid;
  align-items: end;
  gap: clamp(36px, 7vw, 110px);
  margin-bottom: 42px;
  grid-template-columns: minmax(0, 1.2fr) minmax(300px, 0.8fr);
}

.v3-solution-system__head h2,
.v3-project-evidence__head h2 {
  margin: 14px 0 0;
  color: inherit;
  font-size: clamp(2.35rem, 4.5vw, 5rem);
  line-height: 1.02;
  letter-spacing: -0.055em;
}

.v3-solution-system__head > p,
.v3-project-evidence__head > p {
  margin: 0;
  color: rgba(255, 255, 255, 0.58);
  font-size: 0.82rem;
  line-height: 1.8;
}

.v3-solution-steps {
  display: grid;
  border-top: 1px solid rgba(255, 255, 255, 0.18);
  border-bottom: 1px solid rgba(255, 255, 255, 0.18);
  grid-template-columns: repeat(4, minmax(0, 1fr));
}

.v3-solution-steps article {
  min-height: 206px;
  padding: 24px 22px;
  border-right: 1px solid rgba(255, 255, 255, 0.18);
}

.v3-solution-steps article:last-child {
  border-right: 0;
}

.v3-solution-steps span {
  display: block;
  margin-bottom: 42px;
  color: var(--v3-orange);
  font-family: Arial, sans-serif;
  font-size: 0.66rem;
  font-weight: 700;
}

.v3-solution-steps strong {
  display: block;
  font-size: 1.15rem;
}

.v3-solution-steps p {
  margin: 12px 0 0;
  color: rgba(255, 255, 255, 0.58);
  font-size: 0.76rem;
  line-height: 1.7;
}

.v3-solution-media {
  display: grid;
  gap: 2px;
  margin-top: 38px;
  grid-template-columns: 1.35fr repeat(2, minmax(0, 0.82fr));
}

.v3-solution-media figure {
  position: relative;
  min-height: 310px;
  margin: 0;
  overflow: hidden;
  background: #242426;
}

.v3-solution-media img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.v3-solution-media figcaption,
.v3-project-gallery figcaption {
  position: absolute;
  right: 0;
  bottom: 0;
  left: 0;
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 44px 18px 16px;
  background: linear-gradient(0deg, rgba(12, 12, 13, 0.84), transparent);
  color: var(--v3-white);
  font-size: 0.72rem;
}

.v3-solution-media figcaption small,
.v3-project-gallery figcaption span {
  color: var(--v3-orange);
  font-family: Arial, sans-serif;
  font-size: 0.62rem;
  font-weight: 700;
}

.v3-media-note {
  margin: 14px 0 0;
  color: rgba(255, 255, 255, 0.46);
  font-size: 0.68rem;
}

.v3-project-evidence {
  padding: clamp(70px, 6.5vw, 104px) 0;
  background: #26272a;
  color: var(--v3-white);
}

.v3-project-gallery {
  display: grid;
  gap: 2px;
  grid-template-columns: repeat(2, minmax(0, 1fr));
}

.v3-project-gallery figure {
  position: relative;
  min-height: 430px;
  margin: 0;
  overflow: hidden;
  background: #1d1e20;
}

.v3-project-gallery img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.v3-project-gallery--count-1 {
  grid-template-columns: 1fr;
}

.v3-project-gallery-placeholder {
  display: flex;
  min-height: 340px;
  flex-direction: column;
  justify-content: flex-end;
  padding: clamp(34px, 5vw, 70px);
  border: 1px solid rgba(255, 255, 255, 0.18);
  background:
    linear-gradient(135deg, rgba(243, 125, 31, 0.12), transparent 45%),
    repeating-linear-gradient(90deg, transparent 0, transparent 79px, rgba(255, 255, 255, 0.045) 80px);
}

.v3-project-gallery-placeholder span {
  color: var(--v3-orange);
  font-family: Arial, sans-serif;
  font-size: 0.64rem;
  font-weight: 700;
  letter-spacing: 0.13em;
}

.v3-project-gallery-placeholder strong {
  max-width: 760px;
  margin-top: 18px;
  font-size: clamp(1.8rem, 3vw, 3.5rem);
  line-height: 1.15;
}

.v3-project-gallery-placeholder p {
  margin: 16px 0 0;
  color: rgba(255, 255, 255, 0.58);
}

.v3-project-boundary {
  display: grid;
  margin-top: 28px;
  border-top: 1px solid rgba(255, 255, 255, 0.18);
  border-bottom: 1px solid rgba(255, 255, 255, 0.18);
  grid-template-columns: repeat(3, minmax(0, 1fr));
}

.v3-project-boundary > div {
  min-height: 122px;
  padding: 22px 24px;
  border-right: 1px solid rgba(255, 255, 255, 0.18);
}

.v3-project-boundary > div:last-child {
  border-right: 0;
}

.v3-project-boundary small,
.v3-project-boundary strong {
  display: block;
}

.v3-project-boundary small {
  margin-bottom: 12px;
  color: var(--v3-orange);
  font-size: 0.66rem;
}

.v3-project-boundary strong {
  font-size: 0.86rem;
  line-height: 1.55;
}

.v3-knowledge-guide {
  padding: 26px 0;
  border-top: 1px solid var(--v3-line);
  border-bottom: 1px solid var(--v3-line);
  background: var(--v3-paper);
}

.v3-knowledge-guide__grid {
  display: grid;
  align-items: center;
  gap: 22px;
  grid-template-columns: 0.6fr 1fr 1fr auto;
}

.v3-knowledge-guide__grid > div {
  min-height: 64px;
  padding-left: 22px;
  border-left: 1px solid var(--v3-line);
}

.v3-knowledge-guide__grid small,
.v3-knowledge-guide__grid strong {
  display: block;
}

.v3-knowledge-guide__grid small {
  margin-bottom: 7px;
  color: var(--v3-muted);
  font-size: 0.64rem;
}

.v3-knowledge-guide__grid strong {
  color: var(--v3-ink);
  font-size: 0.82rem;
  line-height: 1.55;
}

.v3-knowledge-guide__grid > a {
  display: flex;
  min-width: 135px;
  min-height: 54px;
  align-items: center;
  justify-content: space-between;
  padding: 14px 16px;
  background: var(--v3-ink);
  color: var(--v3-white);
  font-size: 0.72rem;
  font-weight: 700;
  text-decoration: none;
}

.v3-article-layout {
  display: grid;
  align-items: start;
  gap: clamp(60px, 8vw, 120px);
  grid-template-columns: minmax(0, 1fr) minmax(290px, 340px);
}

.v3-detail-aside {
  position: sticky;
  top: 108px;
  padding: 34px 30px;
  background: var(--v3-paper);
}

.v3-detail-aside > span,
.v3-brief-form > span {
  color: var(--v3-orange-dark);
  font-family: Arial, sans-serif;
  font-size: 0.62rem;
  font-weight: 700;
  letter-spacing: 0.14em;
}

.v3-detail-aside h2 {
  margin: 14px 0 12px;
  color: var(--v3-ink);
  font-size: clamp(1.5rem, 2.1vw, 2.15rem);
  line-height: 1.2;
}

.v3-detail-aside p {
  margin: 0 0 24px;
  color: var(--v3-text);
  font-size: 0.8rem;
  line-height: 1.75;
}

.v3-detail-toc {
  display: grid;
  margin: 22px 0 26px;
  border-top: 2px solid var(--v3-ink);
}

.v3-detail-toc a {
  display: grid;
  gap: 11px;
  padding: 11px 0;
  border-bottom: 1px solid var(--v3-line);
  color: var(--v3-ink);
  font-size: 0.72rem;
  line-height: 1.45;
  text-decoration: none;
  grid-template-columns: 26px 1fr;
}

.v3-detail-toc a:hover {
  color: var(--v3-orange-dark);
}

.v3-detail-toc a span {
  color: var(--v3-orange-dark);
  font-family: Arial, sans-serif;
  font-size: 0.6rem;
  font-weight: 700;
}

.v3-aside-cta {
  padding-top: 24px;
  margin-top: 20px;
  border-top: 1px solid var(--v3-line);
}

.v3-aside-cta > strong {
  display: block;
  margin-bottom: 10px;
  color: var(--v3-ink);
  font-size: 0.92rem;
}

.v3-prose h2 {
  scroll-margin-top: 112px;
}

.v3-detail-aside .v3-button {
  width: 100%;
}

.v3-editor-meta {
  display: grid;
  margin: 30px 0 0;
  border-top: 1px solid var(--v3-line);
  grid-template-columns: 74px 1fr;
}

.v3-editor-meta dt,
.v3-editor-meta dd {
  padding: 10px 0;
  margin: 0;
  border-bottom: 1px solid var(--v3-line);
  font-size: 0.68rem;
}

.v3-editor-meta dt {
  color: var(--v3-muted);
}

.v3-editor-meta dd {
  color: var(--v3-text);
  overflow-wrap: anywhere;
}

.v3-brief-layout {
  display: grid;
  align-items: start;
  gap: clamp(60px, 8vw, 120px);
  grid-template-columns: minmax(0, 0.9fr) minmax(420px, 1.1fr);
}

.v3-brief-intro {
  position: sticky;
  top: 110px;
}

.v3-brief-intro h2,
.v3-brief-form h2 {
  margin: 18px 0 16px;
  color: var(--v3-ink);
  font-size: clamp(2rem, 3.3vw, 3.8rem);
  line-height: 1.12;
  letter-spacing: -0.045em;
}

.v3-brief-intro > p:not(.v3-section-marker) {
  color: var(--v3-text);
  line-height: 1.85;
}

.v3-brief-intro ol {
  padding: 0;
  margin: 34px 0 0;
  border-top: 2px solid var(--v3-ink);
  list-style: none;
}

.v3-brief-intro li {
  display: grid;
  gap: 15px;
  padding: 17px 0;
  border-bottom: 1px solid var(--v3-line);
  grid-template-columns: 34px 120px 1fr;
}

.v3-brief-intro li span {
  color: var(--v3-orange-dark);
  font-family: Arial, sans-serif;
  font-size: 0.66rem;
}

.v3-brief-intro li strong {
  font-size: 0.88rem;
}

.v3-brief-intro li small {
  color: var(--v3-muted);
}

.v3-brief-form {
  padding: clamp(30px, 4vw, 50px);
  background: var(--v3-white);
}

.changhe-site-v3 .changhe-form {
  display: grid;
  gap: 18px;
  grid-template-columns: repeat(2, minmax(0, 1fr));
}

.changhe-site-v3 .changhe-form__progress {
  display: grid;
  grid-column: 1 / -1;
  padding: 0;
  margin: 4px 0 18px;
  border-top: 1px solid var(--v3-line);
  border-bottom: 1px solid var(--v3-line);
  list-style: none;
  grid-template-columns: repeat(3, minmax(0, 1fr));
}

.changhe-site-v3 .changhe-form__progress li {
  display: grid;
  gap: 4px;
  min-height: 70px;
  padding: 14px 12px;
  border-right: 1px solid var(--v3-line);
  color: var(--v3-muted);
}

.changhe-site-v3 .changhe-form__progress li:last-child {
  border-right: 0;
}

.changhe-site-v3 .changhe-form__progress li[aria-current="step"] {
  background: var(--v3-black);
  color: var(--v3-white);
}

.changhe-site-v3 .changhe-form__progress span {
  color: var(--v3-orange-dark);
  font-family: Arial, sans-serif;
  font-size: 0.59rem;
  font-weight: 700;
}

.changhe-site-v3 .changhe-form__progress strong {
  font-size: 0.72rem;
}

.changhe-site-v3 .changhe-form__step {
  display: grid;
  gap: 18px;
  min-width: 0;
  padding: 0;
  margin: 0;
  border: 0;
  grid-column: 1 / -1;
  grid-template-columns: repeat(2, minmax(0, 1fr));
}

.changhe-site-v3 .changhe-form.is-enhanced .changhe-form__step[hidden] {
  display: none;
}

.changhe-site-v3 .changhe-form__step-head {
  grid-column: 1 / -1;
  padding-bottom: 15px;
  border-bottom: 1px solid var(--v3-line);
}

.changhe-site-v3 .changhe-form__step-head span {
  color: var(--v3-orange-dark);
  font-family: Arial, sans-serif;
  font-size: 0.61rem;
  font-weight: 700;
}

.changhe-site-v3 .changhe-form__step-head h3 {
  margin: 7px 0 0;
  color: var(--v3-ink);
  font-size: 1.25rem;
}

.changhe-site-v3 .changhe-form__step-head p {
  margin: 8px 0 0;
  color: var(--v3-muted);
  font-size: 0.7rem;
  line-height: 1.6;
}

.changhe-site-v3 .changhe-form__field {
  min-width: 0;
}

.changhe-site-v3 .changhe-form__field--full {
  grid-column: 1 / -1;
}

.changhe-site-v3 .changhe-form label {
  display: block;
  margin-bottom: 7px;
  color: var(--v3-ink);
  font-size: 0.76rem;
  font-weight: 700;
}

.changhe-site-v3 .changhe-form input:not([type="checkbox"]),
.changhe-site-v3 .changhe-form select,
.changhe-site-v3 .changhe-form textarea {
  width: 100%;
  min-height: 48px;
  padding: 11px 12px;
  border: 1px solid var(--v3-line);
  border-radius: 0;
  background: var(--v3-paper);
  color: var(--v3-ink);
}

.changhe-site-v3 .changhe-form textarea {
  min-height: 130px;
  resize: vertical;
}

.changhe-site-v3 .changhe-form small {
  display: block;
  margin-top: 6px;
  color: var(--v3-muted);
  font-size: 0.65rem;
}

.changhe-site-v3 .changhe-form button {
  width: 100%;
  min-height: 54px;
  border: 0;
  border-radius: 0;
  background: var(--v3-orange);
  color: var(--v3-black);
  cursor: pointer;
  font-weight: 750;
}

.changhe-site-v3 .changhe-form__actions {
  display: flex;
  gap: 10px;
  grid-column: 1 / -1;
}

.changhe-site-v3 .changhe-form__actions button {
  flex: 1;
}

.changhe-site-v3 .changhe-form__actions .changhe-form__back {
  border: 1px solid var(--v3-line);
  background: transparent;
  color: var(--v3-ink);
}

.v3-archive-hero {
  padding: 190px 0 90px;
  background:
    linear-gradient(120deg, rgba(246, 134, 36, 0.08), transparent 45%),
    var(--v3-black);
  color: var(--v3-white);
}

.v3-archive-hero h1 {
  margin: 0;
  color: var(--v3-white);
  font-size: clamp(3rem, 6vw, 6.4rem);
  line-height: 1.04;
  letter-spacing: -0.055em;
}

.v3-archive-hero__lead {
  max-width: 760px;
  margin-top: 22px;
  color: rgba(255, 255, 255, 0.65);
  line-height: 1.8;
}

.v3-pagination {
  margin-top: 50px;
}

.v3-pagination .nav-links {
  display: flex;
  gap: 8px;
}

.v3-pagination .page-numbers {
  display: inline-flex;
  min-width: 38px;
  min-height: 38px;
  align-items: center;
  justify-content: center;
  border: 1px solid var(--v3-line);
  color: var(--v3-ink);
  text-decoration: none;
}

.v3-pagination .current {
  border-color: var(--v3-orange);
  background: var(--v3-orange);
}

.v3-not-found {
  display: flex;
  min-height: 100svh;
  align-items: center;
  padding: 150px 0 100px;
  background: var(--v3-black);
  color: var(--v3-white);
}

.v3-not-found strong {
  display: block;
  color: var(--v3-orange);
  font-family: Arial, sans-serif;
  font-size: clamp(7rem, 20vw, 18rem);
  line-height: 0.8;
  letter-spacing: -0.08em;
}

.v3-not-found h1 {
  margin: 38px 0 12px;
  color: var(--v3-white);
  font-size: clamp(2.2rem, 4vw, 4.2rem);
}

.v3-not-found > .v3-shell > p:not(.v3-kicker) {
  color: rgba(255, 255, 255, 0.6);
}

@media (max-width: 1120px) {
  .v3-nav .site-nav__list {
    gap: 13px;
  }

  .v3-nav .site-nav__list > li > a,
  .v3-menu-item__top > a {
    font-size: 0.77rem;
  }

  .v3-submenu-toggle {
    width: 16px;
  }
}

@media (max-width: 1020px) {
  .v3-nav {
    max-height: calc(100svh - 72px);
    overflow-y: auto;
    overscroll-behavior: contain;
  }

  .v3-menu-item__top {
    display: grid;
    grid-template-columns: 1fr 44px;
  }

  .v3-menu-item__top > a {
    padding: 14px 0 !important;
  }

  .v3-submenu-toggle {
    width: 44px;
    height: 48px;
    color: var(--v3-white);
  }

  .v3-menu-item--has-children:hover .v3-submenu-toggle,
  .v3-menu-item--has-children:focus-within .v3-submenu-toggle {
    transform: none;
  }

  .v3-menu-item--has-children.is-submenu-open .v3-submenu-toggle {
    color: var(--v3-orange);
    transform: rotate(180deg);
  }

  .v3-mega {
    position: static;
    display: none;
    visibility: visible;
    padding: 0 0 15px 17px;
    background: transparent;
    box-shadow: none;
    opacity: 1;
    transform: none;
    grid-template-columns: 1fr;
  }

  .v3-menu-item--has-children:hover > .v3-mega,
  .v3-menu-item--has-children:focus-within > .v3-mega {
    display: none;
  }

  .v3-menu-item--has-children.is-submenu-open > .v3-mega {
    display: grid;
  }

  .v3-mega__intro {
    display: none;
  }

  .v3-mega__links--2 {
    grid-template-columns: 1fr;
  }

  .v3-nav .v3-mega__links > a {
    min-height: 42px;
    padding: 8px 0 !important;
    font-size: 0.76rem;
  }

  .v3-catalog-group {
    scroll-margin-top: 72px;
  }

  .v3-card-grid--3 {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .v3-product-directory__grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .v3-amphi-overview__grid,
  .v3-amphi-section-head,
  .v3-amphi-action__grid {
    gap: 34px;
    grid-template-columns: minmax(0, 1.05fr) minmax(280px, 0.95fr);
  }

  .v3-amphi-signals,
  .v3-amphi-config__grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .v3-custom-maturity {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .v3-amphi-signals > div:nth-child(2),
  .v3-amphi-config__grid article:nth-child(2) {
    border-right: 0;
  }

  .v3-amphi-signals > div:nth-child(-n + 2),
  .v3-amphi-config__grid article:nth-child(-n + 2) {
    border-bottom: 1px solid var(--v3-line);
  }

  .v3-amphi-config__grid article:nth-child(-n + 2) {
    border-bottom-color: rgba(255, 255, 255, 0.16);
  }

  .v3-amphi-model-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .v3-amphi-media__grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .v3-platform-type-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .v3-article-layout,
  .v3-brief-layout {
    gap: 54px;
    grid-template-columns: minmax(0, 1fr) minmax(290px, 0.7fr);
  }

  .v3-product-showcase__layout {
    grid-template-columns: minmax(0, 1fr) minmax(250px, 0.5fr);
  }

  .v3-solution-steps {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .v3-solution-steps article:nth-child(2) {
    border-right: 0;
  }

  .v3-solution-steps article:nth-child(-n + 2) {
    border-bottom: 1px solid rgba(255, 255, 255, 0.18);
  }

  .v3-knowledge-guide__grid {
    grid-template-columns: 0.7fr 1.3fr;
  }

  .v3-knowledge-guide__grid > a {
    grid-column: 2;
  }
}

@media (max-width: 760px) {
  .v3-inner-hero,
  .v3-inner-hero__inner {
    min-height: 500px;
  }

  .v3-inner-hero__inner {
    padding-top: 98px;
  }

  .v3-inner-hero__copy {
    padding: 36px 0 32px;
  }

  .v3-inner-hero__copy h1 {
    font-size: clamp(2.35rem, 11vw, 3.8rem);
    line-height: 1.08;
  }

  .v3-inner-hero--amphibious-series .v3-inner-hero__copy h1 {
    max-width: 9.4em;
    font-size: clamp(2rem, 9vw, 2.25rem);
    line-height: 1.12;
  }

  .v3-inner-hero__copy > p:last-child {
    margin-top: 15px;
    font-size: 0.86rem;
    line-height: 1.7;
  }

  .v3-inner-hero__foot {
    min-height: 56px;
    justify-content: flex-start;
  }

  .v3-inner-hero__foot span:nth-child(2),
  .v3-inner-hero__foot strong {
    display: none;
  }

  .v3-inner-hero__image--missing {
    align-items: flex-start;
    justify-content: flex-end;
    padding: 92px 20px 140px;
  }

  .v3-inner-hero__image--missing > span {
    align-items: flex-start;
    text-align: left;
  }

  .v3-page-section,
  .v3-catalog-group {
    padding: 62px 0;
  }

  .v3-product-directory {
    padding: 58px 0;
  }

  .v3-product-directory__head {
    gap: 20px;
    padding-bottom: 28px;
    grid-template-columns: 1fr;
  }

  .v3-product-directory__head h2 {
    font-size: 2.55rem;
  }

  .v3-product-directory__grid {
    grid-template-columns: 1fr;
  }

  .v3-product-directory__subhead {
    gap: 15px;
    padding-top: 40px;
    grid-template-columns: 1fr;
  }

  .v3-product-directory__subhead .v3-section-marker {
    grid-column: auto;
  }

  .v3-product-directory__item {
    min-height: 158px;
    padding: 23px 20px 56px;
  }

  .v3-product-directory__item-foot {
    right: 20px;
    bottom: 18px;
    left: 69px;
  }

  .v3-amphi-overview,
  .v3-amphi-chooser,
  .v3-amphi-models,
  .v3-amphi-config,
  .v3-platform-types,
  .v3-amphi-media,
  .v3-amphi-related,
  .v3-amphi-action {
    padding: 62px 0;
  }

  .v3-amphi-overview__grid,
  .v3-amphi-section-head,
  .v3-amphi-action__grid {
    align-items: start;
    gap: 24px;
    grid-template-columns: 1fr;
  }

  .v3-amphi-overview h2,
  .v3-amphi-section-head h2,
  .v3-amphi-action h2 {
    max-width: 100%;
    font-size: 2.05rem;
    line-height: 1.06;
    overflow-wrap: anywhere;
    word-break: break-all;
  }

  .v3-amphi-models .v3-amphi-section-head h2 {
    max-width: 9em;
    font-size: 2.18rem;
    overflow-wrap: anywhere;
  }

  .v3-amphi-signals,
  .v3-amphi-config__grid {
    margin-top: 34px;
    grid-template-columns: 1fr;
  }

  .v3-custom-maturity {
    margin-top: 22px;
    grid-template-columns: 1fr;
  }

  .v3-custom-maturity article {
    min-height: 0;
  }

  .v3-custom-maturity p {
    min-height: 0;
  }

  .v3-amphi-signals > div,
  .v3-amphi-signals > div:nth-child(2),
  .v3-amphi-config__grid article,
  .v3-amphi-config__grid article:nth-child(2) {
    min-height: 0;
    padding: 20px 18px;
    border-right: 0;
    border-bottom: 1px solid var(--v3-line);
  }

  .v3-amphi-config__grid article,
  .v3-amphi-config__grid article:nth-child(2) {
    border-bottom-color: rgba(255, 255, 255, 0.16);
  }

  .v3-amphi-signals > div:last-child,
  .v3-amphi-config__grid article:last-child {
    border-bottom: 0;
  }

  .v3-amphi-signals span,
  .v3-amphi-config__grid span {
    margin-bottom: 12px;
  }

  .v3-amphi-model-nav {
    margin: 22px 0 28px;
  }

  .v3-amphi-scenario-grid {
    display: flex;
    gap: 2px;
    overflow-x: auto;
    scroll-snap-type: x mandatory;
  }

  .v3-amphi-scenario-grid > a {
    flex: 0 0 min(86vw, 360px);
    aspect-ratio: 4 / 3;
    scroll-snap-align: start;
  }

  .v3-amphi-scenario-grid > a > div {
    right: 18px;
    bottom: 18px;
    left: 18px;
    display: block;
  }

  .v3-amphi-scenario-grid strong {
    display: block;
    max-width: none;
    font-size: 1.35rem;
  }

  .v3-amphi-scenario-grid em {
    display: block;
    margin-top: 8px;
  }

  .v3-amphi-config-visuals {
    display: flex;
    gap: 2px;
    overflow-x: auto;
    scroll-snap-type: x mandatory;
  }

  .v3-amphi-config-visuals article {
    flex: 0 0 min(82vw, 330px);
    scroll-snap-align: start;
  }

  .v3-amphi-config__foot {
    align-items: flex-start;
    flex-direction: column;
    gap: 14px;
  }

  .v3-amphi-model-grid {
    display: flex;
    gap: 12px;
    overflow-x: auto;
    padding: 0 0 13px;
    scroll-snap-type: x mandatory;
  }

  .v3-amphi-model-card {
    flex: 0 0 min(82vw, 330px);
    scroll-snap-align: start;
  }

  .v3-amphi-details__marker {
    display: grid;
    gap: 10px;
    margin-bottom: 34px;
  }

  .v3-amphi-media__grid {
    display: flex;
    gap: 2px;
    overflow-x: auto;
    scroll-snap-type: x mandatory;
  }

  .v3-platform-type-grid {
    display: flex;
    gap: 2px;
    overflow-x: auto;
    scroll-snap-type: x mandatory;
  }

  .v3-platform-type-grid article {
    flex: 0 0 min(82vw, 330px);
    scroll-snap-align: start;
  }

  .v3-platform-type-grid article > div {
    min-height: 164px;
  }

  .v3-amphi-media__grid figure {
    flex: 0 0 min(82vw, 330px);
    scroll-snap-align: start;
  }

  .v3-amphi-related__grid {
    grid-template-columns: 1fr;
  }

  .v3-amphi-related__grid a {
    min-height: 150px;
    border-right: 0;
    border-bottom: 1px solid var(--v3-line);
  }

  .v3-amphi-related__grid a:last-child {
    border-bottom: 0;
  }

  .v3-lead-layout,
  .v3-detail-summary__grid {
    gap: 28px;
    grid-template-columns: 1fr;
  }

  .v3-hub-principles,
  .v3-library-topics,
  .v3-project-policy {
    margin-top: 36px;
    grid-template-columns: 1fr;
  }

  .v3-hub-principles > div,
  .v3-library-topics > div,
  .v3-project-policy > div {
    min-height: 0;
    padding: 17px 0;
    border-right: 0;
    border-bottom: 1px solid var(--v3-line);
  }

  .v3-hub-principles > div:last-child,
  .v3-library-topics > div:last-child,
  .v3-project-policy > div:last-child {
    border-bottom: 0;
  }

  .v3-hub-principles span,
  .v3-library-topics span,
  .v3-project-policy span {
    margin-bottom: 9px;
  }

  .v3-prose {
    font-size: 0.9rem;
    line-height: 1.8;
  }

  .v3-prose h2 {
    padding-top: 35px;
    margin-top: 40px;
    font-size: 1.8rem;
  }

  .v3-group-head {
    gap: 13px;
    margin-bottom: 30px;
    grid-template-columns: 30px 1fr;
  }

  .v3-group-head em {
    display: none;
  }

  .v3-group-head h2 {
    font-size: 2.15rem;
  }

  .v3-group-head__actions {
    align-items: flex-start;
    grid-column: 2;
    padding: 0;
  }

  .v3-card-grid--3,
  .v3-card-grid--2 {
    grid-template-columns: 1fr;
  }

  .v3-card-grid {
    gap: 38px;
  }

  .v3-list-card__media {
    aspect-ratio: 16 / 10;
  }

  .v3-article-marker {
    gap: 10px;
    grid-template-columns: 1fr;
  }

  .v3-base-media {
    grid-template-columns: 1fr;
  }

  .v3-base-media figure:nth-child(n + 2) {
    display: none;
  }

  .v3-base-media img {
    aspect-ratio: 16 / 10;
  }

  .v3-detail-facts {
    grid-template-columns: 1fr;
  }

  .v3-detail-facts span {
    min-height: 68px;
    padding-inline: 0;
    border-right: 0;
    border-bottom: 1px solid var(--v3-line);
  }

  .v3-detail-facts span:last-child {
    border-bottom: 0;
  }

  .v3-product-showcase__head {
    gap: 20px;
    grid-template-columns: 1fr;
  }

  .v3-product-showcase__head h2 {
    font-size: 2.55rem;
  }

  .v3-product-showcase__layout {
    grid-template-columns: 1fr;
  }

  .v3-product-gallery {
    min-height: 0;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    grid-template-rows: auto;
  }

  .v3-product-gallery__main {
    aspect-ratio: 4 / 3;
    grid-column: 1 / 3;
    grid-row: auto;
  }

  .v3-product-gallery__secondary {
    aspect-ratio: 1 / 1;
  }

  .v3-product-gallery--count-1 .v3-product-gallery__main {
    grid-column: 1 / 3;
    grid-row: auto;
  }

  .v3-product-gallery--count-2 .v3-product-gallery__main {
    grid-column: auto;
  }

  .v3-product-download {
    min-height: 390px;
    padding: 28px 23px;
  }

  .v3-solution-system__head,
  .v3-project-evidence__head {
    gap: 20px;
    grid-template-columns: 1fr;
  }

  .v3-solution-system__head h2,
  .v3-project-evidence__head h2 {
    font-size: 2.7rem;
  }

  .v3-solution-steps {
    grid-template-columns: 1fr;
  }

  .v3-solution-steps article {
    min-height: 0;
    padding: 21px 0;
    border-right: 0;
    border-bottom: 1px solid rgba(255, 255, 255, 0.18);
  }

  .v3-solution-steps article:last-child {
    border-bottom: 0;
  }

  .v3-solution-steps span {
    margin-bottom: 18px;
  }

  .v3-solution-media {
    grid-template-columns: 1fr;
  }

  .v3-solution-media figure {
    min-height: 230px;
    aspect-ratio: 16 / 10;
  }

  .v3-project-gallery {
    grid-template-columns: 1fr;
  }

  .v3-project-gallery figure {
    min-height: 0;
    aspect-ratio: 4 / 3;
  }

  .v3-project-boundary {
    grid-template-columns: 1fr;
  }

  .v3-project-boundary > div {
    min-height: 0;
    padding: 18px 0;
    border-right: 0;
    border-bottom: 1px solid rgba(255, 255, 255, 0.18);
  }

  .v3-project-boundary > div:last-child {
    border-bottom: 0;
  }

  .v3-project-gallery-placeholder {
    min-height: 300px;
    padding: 28px 24px;
  }

  .v3-knowledge-guide__grid {
    gap: 18px;
    grid-template-columns: 1fr;
  }

  .v3-knowledge-guide__grid > div {
    min-height: 0;
    padding: 14px 0 0;
    border-top: 1px solid var(--v3-line);
    border-left: 0;
  }

  .v3-knowledge-guide__grid > a {
    grid-column: auto;
  }

  .v3-article-layout,
  .v3-brief-layout {
    grid-template-columns: 1fr;
  }

  .v3-detail-aside,
  .v3-brief-intro {
    position: static;
  }

  .v3-detail-aside {
    padding: 28px 24px;
  }

  .v3-brief-intro li {
    grid-template-columns: 28px 1fr;
  }

  .v3-brief-intro li small {
    grid-column: 2;
  }

  .v3-brief-form {
    padding: 28px 20px;
  }

  .changhe-site-v3 .changhe-form {
    grid-template-columns: 1fr;
  }

  .changhe-site-v3 .changhe-form__step {
    grid-template-columns: 1fr;
  }

  .changhe-site-v3 .changhe-form__progress li {
    min-height: 62px;
    padding: 12px 8px;
  }

  .changhe-site-v3 .changhe-form__progress strong {
    font-size: 0.66rem;
  }

  .v3-archive-hero {
    padding: 150px 0 70px;
  }

  .v3-archive-hero h1 {
    font-size: 3.2rem;
  }
}

@media (prefers-reduced-motion: reduce) {
  .v3-mega,
  .v3-list-card__media img,
  .v3-submenu-toggle {
    transition: none;
  }
}

/* Final review: amphibious series only; other series and the frozen home stay unchanged. */
.v3-amphi-series-final .v3-amphi-model-card,
.v3-amphi-series-final #amphi-configuration-brief {
  scroll-margin-top: 108px;
}

.v3-amphi-series-final .v3-amphi-model-nav a {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 12px;
  min-height: 48px;
}

.v3-amphi-series-final .v3-amphi-model-nav a span {
  color: var(--v3-orange-dark);
}

.v3-amphi-series-final .v3-amphi-model-nav a:focus-visible,
.v3-amphi-series-final .v3-amphi-config__consult:focus-visible {
  outline: 2px solid var(--v3-orange);
  outline-offset: -3px;
}

.v3-amphi-series-final .v3-amphi-model-card:target {
  outline: 2px solid var(--v3-orange);
  outline-offset: -2px;
}

.v3-amphi-series-final .v3-amphi-model-grid {
  grid-template-columns: repeat(8, minmax(0, 1fr));
  grid-auto-rows: 1fr;
}

.v3-amphi-series-final .v3-amphi-model-card {
  display: flex;
  flex-direction: column;
  grid-column: span 2;
}

.v3-amphi-series-final .v3-amphi-model-card:nth-child(5) {
  grid-column: 2 / span 2;
}

.v3-amphi-series-final .v3-amphi-model-card__media {
  flex: 0 0 auto;
}

.v3-amphi-series-final .v3-amphi-model-card__media img {
  display: block;
  object-fit: contain;
  object-position: center;
}

.v3-amphi-series-final .v3-amphi-model-card__body {
  display: flex;
  flex: 1;
  flex-direction: column;
}

.v3-amphi-series-final .v3-amphi-model-card__source {
  display: block;
  min-height: 2.8em;
  color: var(--v3-muted);
  font-size: 0.59rem;
  font-weight: 400;
  line-height: 1.4;
}

.v3-amphi-series-final .v3-amphi-model-card h3 {
  margin-top: 8px;
  font-family: Arial, sans-serif;
  font-size: clamp(1.3rem, 1.7vw, 1.7rem);
}

.v3-amphi-series-final .v3-amphi-model-card h3 small {
  display: block;
  margin-top: 8px;
  color: var(--v3-text);
  font-size: 0.74rem;
  font-weight: 400;
}

.v3-amphi-series-final .v3-amphi-model-facts {
  display: grid;
  gap: 0;
  margin: 22px 0 20px;
  font-size: 0.7rem;
  line-height: 1.6;
}

.v3-amphi-series-final .v3-amphi-model-facts > div {
  display: grid;
  align-items: start;
  gap: 8px;
  min-height: calc(1.6em + 21px);
  padding: 10px 0;
  border-top: 1px solid var(--v3-line);
  grid-template-columns: 4em minmax(0, 1fr);
}

.v3-amphi-series-final .v3-amphi-model-facts dt {
  color: var(--v3-muted);
}

.v3-amphi-series-final .v3-amphi-model-facts dd {
  min-width: 0;
  margin: 0;
  color: var(--v3-text);
  overflow-wrap: anywhere;
}

.v3-amphi-series-final .v3-amphi-model-card .v3-list-card__link {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-top: auto;
  min-height: 44px;
  border-top: 1px solid var(--v3-line);
}

.v3-amphi-series-final .v3-amphi-config__consult {
  max-width: 100%;
  padding: 14px 18px;
  border: 1px solid var(--v3-orange);
  line-height: 1.6;
}

.v3-amphi-series-final .v3-amphi-config__consult:hover {
  color: var(--v3-black);
  background: var(--v3-orange);
}

.v3-amphi-series-final .v3-amphi-input-hints {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin: 18px 0 24px;
  padding: 0;
  list-style: none;
}

.v3-amphi-series-final .v3-amphi-input-hints li {
  padding: 6px 12px;
  border: 1px solid var(--v3-line);
  font-size: 0.74rem;
}

.v3-footer--amphi-compact .v3-footer__top {
  grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
}

@media (max-width: 1020px) {
  .v3-amphi-series-final .v3-amphi-model-grid {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

  .v3-amphi-series-final .v3-amphi-model-card:nth-child(5) {
    grid-column: span 2;
  }

  .v3-amphi-series-final .v3-amphi-model-card:last-child {
    grid-column: 2 / span 2;
  }
}

@media (max-width: 760px) {
  .v3-amphi-series-final .v3-amphi-model-card,
  .v3-amphi-series-final #amphi-configuration-brief {
    scroll-margin-top: 82px;
  }

  .v3-amphi-series-final .v3-amphi-scenario-grid {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    overflow: visible;
  }

  .v3-amphi-series-final .v3-amphi-scenario-grid > a {
    aspect-ratio: 3 / 4;
  }

  .v3-amphi-series-final .v3-amphi-scenario-grid small {
    top: 14px;
    left: 12px;
    right: 12px;
    font-size: 0.5rem;
    line-height: 1.6;
  }

  .v3-amphi-series-final .v3-amphi-scenario-grid > a > div {
    right: 12px;
    bottom: 14px;
    left: 12px;
  }

  .v3-amphi-series-final .v3-amphi-scenario-grid strong {
    font-size: clamp(0.95rem, 4vw, 1.25rem);
    line-height: 1.35;
  }

  .v3-amphi-series-final .v3-amphi-scenario-grid em {
    font-size: 0.57rem;
    line-height: 1.6;
    white-space: normal;
  }

  .v3-amphi-series-final .v3-amphi-model-nav {
    display: grid;
    overflow: visible;
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

  .v3-amphi-series-final .v3-amphi-model-nav a {
    min-width: 0;
    padding: 10px 4px;
    gap: 4px;
    font-size: 0.61rem;
  }

  .v3-amphi-series-final .v3-amphi-model-nav a:nth-child(n + 5) {
    border-top: 1px solid var(--v3-line);
  }

  .v3-amphi-series-final .v3-amphi-model-grid {
    /* Preserve the existing compact mobile card carousel. */
    display: flex;
    align-items: stretch;
    scroll-padding-inline: 2px;
    padding-top: 2px;
  }

  .v3-amphi-series-final .v3-amphi-model-card__media {
    width: 100%;
  }

  .v3-footer--amphi-compact .v3-footer__top {
    grid-template-columns: 1fr;
  }
}