:root {
  --page: #ededed;
  --ink: #050505;
  --muted: #6e6e6e;
  --line: rgba(0, 0, 0, 0.12);
  --soft: #f7f7f5;
  --warm: #c9aaa4;
  --stone: #a6a6a3;
  --sand: #bdb392;
  --blue: #053bd8;
  --radius: 22px;
  --max: 1180px;
  --wide-max: 1728px;
  --content-max: 1580px;
  --gutter: clamp(22px, 4vw, 56px);
  --center-gutter: max(var(--gutter), calc((100vw - var(--max)) / 2));
  --frame-x: max(var(--gutter), calc((100vw - var(--wide-max)) / 2));
  --rail-start: max(var(--gutter), calc((100vw - var(--content-max)) / 2));
  --rail-arrow-side: max(34px, calc((100vw - var(--content-max)) / 2 + 20px));
  --arrow-bg: rgba(0, 0, 0, 0.3);
  --arrow-bg-active: rgba(0, 0, 0, 0.46);
  --arrow-shadow: 0 12px 28px rgba(0, 0, 0, 0.1);
  --section-y: clamp(104px, 8.2vw, 150px);
  --section-y-tight: clamp(72px, 6vw, 108px);
  --panel-gap: clamp(72px, 8vw, 132px);
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  background: #050505;
  color: var(--ink);
  font-family: "Helvetica Neue", Arial, "PingFang SC", "Microsoft YaHei", sans-serif;
  font-size: 16px;
  line-height: 1.15;
}

main {
  background: var(--page);
}

html.motion-ready {
  scroll-behavior: auto;
}

body.modal-open {
  overflow: hidden;
}

a {
  color: inherit;
  text-decoration: none;
}

img {
  display: block;
  max-width: 100%;
}

.scroll-progress {
  position: fixed;
  left: 0;
  top: 0;
  z-index: 60;
  width: 100%;
  height: 2px;
  transform: scaleX(0);
  transform-origin: left center;
  background: var(--blue);
  pointer-events: none;
}

button,
select {
  font: inherit;
}

.site-nav {
  position: fixed;
  inset: 0 0 auto 0;
  z-index: 20;
  display: grid;
  grid-template-columns: 1fr auto 1fr;
  align-items: center;
  gap: 28px;
  width: 100%;
  padding: 24px var(--gutter);
  color: #fff;
  transition: color 0.25s ease;
}

.site-nav.nav-on-light {
  color: var(--ink);
}

.brand {
  --brand-logo-width: 108px;
  --brand-logo-height: 32px;
  --brand-gap: 12px;
  display: flex;
  align-items: center;
  justify-self: start;
  gap: var(--brand-gap);
  font-size: 19px;
  font-weight: 700;
  line-height: 1;
  white-space: nowrap;
  width: max-content;
}

.brand-mark,
.brand-word {
  display: block;
  width: var(--brand-logo-width);
  height: var(--brand-logo-height);
  object-fit: contain;
  transition: filter 0.25s ease;
}

.site-nav.nav-on-light .brand-mark,
.site-nav.nav-on-light .brand-word {
  filter: invert(1);
}

.brand-divider {
  display: inline-block;
  width: 1px;
  height: var(--brand-logo-height);
  background: currentColor;
  opacity: 0.45;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 4px;
  padding: 5px;
  border: 1px solid rgba(255, 255, 255, 0.18);
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.12);
  box-shadow: 0 14px 30px rgba(0, 0, 0, 0.08);
  backdrop-filter: blur(14px);
  font-size: 13px;
}

.site-nav.nav-on-light .nav-links {
  border-color: rgba(0, 0, 0, 0.1);
  background: rgba(255, 255, 255, 0.86);
}

.nav-links a {
  display: inline-flex;
  align-items: center;
  min-height: 32px;
  padding: 0 15px;
  border-radius: 999px;
  transition: background-color 0.22s ease, color 0.22s ease;
}

.nav-links a:hover,
.nav-links a:focus-visible {
  background: rgba(255, 255, 255, 0.2);
  outline: 0;
}

.site-nav.nav-on-light .nav-links a:hover,
.site-nav.nav-on-light .nav-links a:focus-visible {
  background: rgba(0, 0, 0, 0.08);
}

.nav-actions {
  display: flex;
  justify-content: flex-end;
  align-items: center;
  gap: 10px;
}

.icon-btn,
.circle-arrow {
  display: inline-grid;
  place-items: center;
  width: 34px;
  height: 34px;
  border: 1px solid currentColor;
  border-radius: 999px;
  background: transparent;
  color: inherit;
  cursor: pointer;
}

.pill {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 34px;
  padding: 0 18px;
  border: 1px solid transparent;
  border-radius: 999px;
  background: #fff;
  color: #050505;
  font-size: 12px;
  font-weight: 700;
  white-space: nowrap;
}

.pill.outline {
  border-color: color-mix(in srgb, currentColor 45%, transparent);
  background: rgba(255, 255, 255, 0.55);
  color: currentColor;
}

.pill.blue {
  background: var(--blue);
  color: #fff;
}

.hero {
  position: relative;
  min-height: 720px;
  height: 100vh;
  overflow: hidden;
  background: #101822;
}

.hero-media {
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: 50% 56%;
  will-change: transform;
  display: block;
}

.hero::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, rgba(0, 0, 0, 0.08), rgba(0, 0, 0, 0.42));
}

.hero-copy {
  position: absolute;
  left: var(--gutter);
  bottom: 58px;
  z-index: 2;
  max-width: 360px;
  color: #fff;
  will-change: transform, opacity;
}

.eyebrow {
  margin: 0 0 28px;
  font-size: 16px;
  font-weight: 700;
}

.hero h1 {
  margin: 0;
  font-size: 42px;
  line-height: 1.45;
  letter-spacing: 0.02em;
}

.scroll-dot {
  position: absolute;
  right: var(--gutter);
  bottom: 58px;
  z-index: 3;
  border-color: rgba(255, 255, 255, 0.36);
  background: rgba(0, 0, 0, 0.24);
  color: #fff;
}

.section {
  position: relative;
  isolation: isolate;
  padding: var(--section-y) var(--gutter);
  scroll-margin-top: 94px;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  justify-content: center;
}

#features {
  scroll-margin-top: clamp(62px, 7.5vh, 96px);
}

#configure {
  scroll-margin-top: clamp(82px, 9.5vh, 118px);
  min-height: auto;
  padding-top: clamp(74px, 7vw, 118px);
  padding-bottom: clamp(84px, 8vw, 132px);
}

.section.tight {
  padding-top: var(--section-y-tight);
  min-height: auto;
  display: block;
}

.section-title {
  max-width: var(--max);
  margin: 0 auto 42px;
  font-size: 30px;
  line-height: 1;
}

.section-kicker {
  max-width: 620px;
  margin: 14px 0 0;
  color: var(--muted);
  font-size: 15px;
  line-height: 1.35;
}

.brand-position {
  min-height: 72vh;
  background: #f7f7f5;
}

.position-grid {
  width: min(100%, var(--max));
  margin: 0 auto;
  display: grid;
  grid-template-columns: minmax(0, 0.92fr) minmax(320px, 0.78fr);
  gap: clamp(38px, 6vw, 92px);
  align-items: center;
}

.position-copy h2 {
  margin: 0 0 24px;
  max-width: 720px;
  font-size: clamp(38px, 5vw, 72px);
  line-height: 0.98;
}

.position-copy p:last-child {
  max-width: 640px;
  margin: 0;
  color: #303030;
  font-size: clamp(18px, 1.5vw, 24px);
  line-height: 1.25;
}

.keyword-panel {
  display: grid;
  gap: 10px;
}

.keyword-panel span {
  display: flex;
  align-items: center;
  min-height: 68px;
  border: 1px solid var(--line);
  border-radius: 14px;
  background: #fff;
  padding: 18px 22px;
  font-size: clamp(18px, 1.6vw, 26px);
  font-weight: 700;
  line-height: 1.05;
}

.cert-row {
  width: min(100%, var(--max));
  margin: clamp(42px, 5vw, 72px) auto 0;
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.cert-row span {
  min-height: 34px;
  display: inline-flex;
  align-items: center;
  border: 1px solid var(--line);
  border-radius: 999px;
  background: #fff;
  padding: 0 14px;
  color: #444;
  font-size: 12px;
  font-weight: 700;
}

.rail-head {
  max-width: none;
  margin: 0 0 34px;
  display: flex;
  align-items: end;
  justify-content: space-between;
  gap: 24px;
}

.rail-head .section-title {
  margin: 0;
}

.rail-actions {
  display: flex;
  align-items: center;
  gap: 8px;
}

.carousel-stage {
  position: relative;
  width: 100%;
}

.carousel-stage > .rail {
  position: relative;
  z-index: 1;
}

.carousel-stage > .rail-actions {
  position: absolute;
  left: 0;
  right: 0;
  height: 0;
  z-index: 10;
  display: block;
  pointer-events: none;
  overflow: visible;
}

.carousel-stage > .rail-actions .circle-arrow {
  position: absolute;
  top: 0;
  transform: translateY(-50%);
  pointer-events: auto;
}

.rail-floater {
  position: absolute;
  right: var(--gutter);
  top: 50%;
  z-index: 4;
  transform: translateY(-50%);
}

.rail-actions .circle-arrow,
.rail-wrap > .circle-arrow {
  background: rgba(255, 255, 255, 0.76);
  border-color: rgba(0, 0, 0, 0.12);
  box-shadow: 0 8px 22px rgba(0, 0, 0, 0.12);
}

.rail-wrap > .circle-arrow {
  position: absolute;
  right: 32px;
  margin-top: -360px;
}

.rail-wrap {
  max-width: none;
  overflow: hidden;
  position: relative;
}

.rail {
  display: grid;
  grid-auto-flow: column;
  grid-auto-columns: minmax(660px, 72vw);
  gap: 18px;
  width: calc(100% + (var(--gutter) * 2));
  margin-left: calc(var(--gutter) * -1);
  margin-right: calc(var(--gutter) * -1);
  overflow-x: auto;
  padding: 0 var(--gutter) 18px;
  scroll-snap-type: x mandatory;
  scrollbar-width: none;
  cursor: grab;
}

.rail.is-dragging {
  cursor: grabbing;
  user-select: none;
  scroll-snap-type: none;
}

.rail.is-dragging * {
  pointer-events: none;
}

#collectionRail {
  grid-auto-columns: min(1180px, calc(100vw - (var(--gutter) * 2)));
}

#collectionRail .model-card {
  min-height: 650px;
  scroll-snap-align: center;
}

.rail::-webkit-scrollbar {
  display: none;
}

.model-card {
  position: relative;
  min-height: 600px;
  display: grid;
  grid-template-columns: 42% 58%;
  gap: 20px;
  align-items: center;
  scroll-snap-align: start;
  overflow: hidden;
  padding: 0 4px;
}

.model-letter {
  position: absolute;
  left: -14px;
  bottom: -90px;
  z-index: 0;
  color: #fff;
  font-size: 320px;
  font-weight: 800;
  line-height: 0.8;
  pointer-events: none;
}

.model-copy {
  position: relative;
  z-index: 2;
  align-self: start;
  padding: 44px 0 0;
}

.model-copy h2 {
  margin: 0 0 28px;
  font-size: 20px;
}

.model-copy p {
  max-width: 300px;
  margin: 0 0 26px;
  font-size: 19px;
  line-height: 1.12;
}

.model-copy ul {
  display: grid;
  gap: 13px;
  margin: 0 0 26px;
  padding: 0 0 0 14px;
  font-size: 13px;
  line-height: 1.25;
}

.model-image {
  position: relative;
  z-index: 2;
  display: grid;
  place-items: center;
  height: 560px;
  cursor: grab;
  touch-action: pan-y;
  user-select: none;
}

.model-image img {
  max-height: 520px;
  width: auto;
  object-fit: contain;
  transition: opacity 0.18s ease, transform 0.35s cubic-bezier(0.22, 1, 0.36, 1);
  will-change: opacity, transform;
}

.model-image:active,
.preview-box:active {
  cursor: grabbing;
}

.model-image.is-spinning img {
  opacity: 0;
  transform: translateX(var(--spin-shift, 0px)) rotateY(var(--spin-angle, 0deg)) scale(0.985);
}

.spin-orbit-controls {
  position: absolute;
  left: 50%;
  bottom: 20px;
  z-index: 5;
  display: inline-grid;
  grid-template-columns: 34px auto 34px;
  align-items: center;
  gap: 10px;
  transform: translateX(-50%);
  color: #050505;
}

.spin-orbit-controls.preview-controls {
  bottom: 40px;
}

.spin-arrow {
  display: grid;
  place-items: center;
  width: 34px;
  height: 34px;
  border: 0;
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.88);
  box-shadow: 0 8px 22px rgba(0, 0, 0, 0.12);
  color: inherit;
  cursor: pointer;
  transition: transform 0.18s ease, background-color 0.18s ease, box-shadow 0.18s ease;
}

.spin-arrow:hover,
.spin-arrow:focus-visible {
  background: #fff;
  box-shadow: 0 10px 28px rgba(0, 0, 0, 0.16);
  transform: translateY(-1px);
}

.spin-pips {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  min-height: 24px;
  padding: 0 9px;
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.66);
}

.spin-pip {
  width: 6px;
  height: 6px;
  border: 0;
  border-radius: 999px;
  background: rgba(5, 5, 5, 0.24);
  cursor: pointer;
}

.spin-pip.active {
  width: 18px;
  background: #050505;
}

.model-image::after,
.preview-box::after {
  content: "";
  position: absolute;
  left: 50%;
  bottom: 72px;
  width: min(220px, 42%);
  height: 24px;
  z-index: -1;
  border-radius: 999px;
  background: rgba(0, 0, 0, 0.1);
  filter: blur(16px);
  transform: translateX(-50%);
  opacity: 0.65;
  pointer-events: none;
}

.preview-box::after {
  bottom: 70px;
  z-index: 0;
}

.model-card .spin-orbit-controls {
  opacity: 0;
  transform: translate(-50%, 8px);
  pointer-events: none;
  transition: opacity 0.22s ease, transform 0.22s ease;
}

.model-card.is-centered .spin-orbit-controls,
.model-card:hover .spin-orbit-controls,
.model-card:focus-within .spin-orbit-controls {
  opacity: 1;
  transform: translate(-50%, 0);
  pointer-events: auto;
}

.warm {
  width: min(calc(100% - (var(--gutter) * 2)), 1320px);
  margin: var(--panel-gap) auto;
  padding: clamp(70px, 6.5vw, 112px) clamp(34px, 5vw, 72px);
  overflow: hidden;
  border-radius: 24px;
  background: var(--warm);
  color: #fff;
}

.warm .rail-head,
.warm .feature-rail {
  max-width: none;
}

.feature-rail {
  display: grid;
  grid-auto-flow: row;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 18px;
  width: auto;
  max-width: var(--max);
  margin: 0 auto;
  padding: 0;
  overflow: visible;
}

.feature-card {
  position: relative;
  height: 420px;
  overflow: hidden;
  border-radius: 18px;
  scroll-snap-align: start;
  background: #777;
  color: #fff;
}

#features .rail-head {
  max-width: var(--max);
  margin-left: auto;
  margin-right: auto;
}

#features .rail-actions {
  display: none;
}

.feature-card,
.project-card,
.tech-card {
  --lift: 0px;
  --tilt-x: 0deg;
  --tilt-y: 0deg;
  --reveal-y: 0px;
  --reveal-scale: 1;
  transform: perspective(900px) translate3d(0, calc(var(--reveal-y) + var(--lift)), 0) rotateX(var(--tilt-x)) rotateY(var(--tilt-y)) scale(var(--reveal-scale));
  transform-style: preserve-3d;
  transition: transform 0.28s ease, filter 0.25s ease, opacity 0.75s ease;
  will-change: transform, opacity;
}

.feature-card:hover,
.project-card:hover,
.tech-card:hover {
  --lift: -4px;
}

.feature-card img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.feature-card::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, rgba(0, 0, 0, 0.06), rgba(0, 0, 0, 0.62));
}

.feature-copy {
  position: absolute;
  left: 24px;
  right: 24px;
  bottom: 22px;
  z-index: 2;
}

.feature-copy h3 {
  margin: 0 0 12px;
  font-size: 25px;
  line-height: 0.98;
}

.feature-copy p {
  margin: 0 0 18px;
  font-size: 13px;
  font-weight: 700;
}

.tiny-pill {
  display: inline-flex;
  align-items: center;
  min-height: 28px;
  padding: 0 13px;
  border-radius: 999px;
  background: #fff;
  color: #050505;
  font-size: 11px;
  font-weight: 700;
}

button.tiny-pill {
  border: 0;
  cursor: pointer;
}

.config-shell {
  width: min(100%, var(--max));
  max-width: var(--max);
  margin: 0 auto;
  border-radius: var(--radius);
  background: #fff;
  padding: 58px;
  min-height: 650px;
}

.config-shell h2 {
  margin: 0;
  font-size: 32px;
}

.config-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 310px;
  gap: 70px;
  margin-top: 42px;
}

.preview-stage {
  display: grid;
  align-content: space-between;
  min-height: 430px;
}

.hint {
  margin: 0;
  font-size: 12px;
  color: var(--muted);
}

.preview-box {
  position: relative;
  display: grid;
  place-items: center;
  height: 430px;
  cursor: grab;
  user-select: none;
  touch-action: pan-y;
  overflow: hidden;
  border-radius: 18px;
  background:
    radial-gradient(circle at 48% 78%, rgba(0, 0, 0, 0.08), transparent 34%),
    linear-gradient(180deg, #fafafa 0%, #f0efec 100%);
}

.preview-box:active {
  cursor: grabbing;
}

.preview-box img {
  max-height: 430px;
  object-fit: contain;
  border-radius: 14px;
  transition: opacity 0.18s ease, transform 0.35s cubic-bezier(0.22, 1, 0.36, 1);
  will-change: opacity, transform;
}

.preview-box.is-spinning img {
  opacity: 0;
  transform: translateX(var(--spin-shift, 0px)) rotateY(var(--spin-angle, 0deg)) scale(0.985);
}

.config-3d-stage {
  position: absolute;
  inset: 0;
  overflow: hidden;
}

.config-3d-stage canvas {
  display: block;
  width: 100%;
  height: 100%;
  outline: 0;
  touch-action: none;
}

.model-loading {
  position: absolute;
  left: 50%;
  top: 50%;
  transform: translate(-50%, -50%);
  color: var(--muted);
  font-size: 12px;
  pointer-events: none;
  transition: opacity 0.18s ease;
}

.config-3d-stage.is-loaded .model-loading {
  opacity: 0;
}

.rotation-hint {
  position: absolute;
  left: 50%;
  bottom: 12px;
  transform: translateX(-50%);
  display: inline-flex;
  align-items: center;
  gap: 10px;
  color: var(--muted);
  font-size: 12px;
  pointer-events: none;
}

.rotation-hint::before,
.rotation-hint::after {
  content: "";
  width: 32px;
  height: 1px;
  background: rgba(0, 0, 0, 0.2);
}

.config-summary {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(136px, 1fr));
  gap: 10px;
}

.summary-chip {
  min-height: 64px;
  display: grid;
  align-content: center;
  gap: 5px;
  border-radius: 12px;
  background: #fff;
  padding: 12px;
  font-size: 12px;
}

.summary-chip span {
  color: var(--muted);
}

.summary-chip strong {
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.config-panel {
  display: grid;
  gap: 22px;
  align-content: start;
}

.control-group label {
  display: block;
  margin-bottom: 10px;
  font-size: 12px;
  color: var(--muted);
}

.segmented {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.segmented button,
.select-like {
  min-height: 30px;
  padding: 0 14px;
  border: 1px solid rgba(0, 0, 0, 0.1);
  border-radius: 999px;
  background: #fff;
  color: #888;
  font-size: 12px;
  cursor: pointer;
}

.segmented button.active {
  background: #777;
  color: #fff;
  border-color: #777;
}

.segmented button:disabled {
  cursor: not-allowed;
  opacity: 0.42;
  background: #f7f7f7;
}

.segmented button:hover {
  border-color: rgba(0, 0, 0, 0.25);
}

.swatch {
  display: inline-flex;
  align-items: center;
  gap: 7px;
}

.swatch::before {
  content: "";
  width: 18px;
  height: 18px;
  border-radius: 999px;
  border: 1px solid rgba(0, 0, 0, 0.2);
  background: var(--swatch);
}

.swatch-grid {
  display: grid;
  grid-template-columns: repeat(8, minmax(0, 1fr));
  gap: 8px;
}

.swatch-dot {
  position: relative;
  width: 100%;
  aspect-ratio: 1 / 1;
  min-height: 28px;
  border-radius: 999px;
  border: 1px solid rgba(0, 0, 0, 0.18);
  background: var(--swatch);
  cursor: pointer;
  padding: 0;
  transition: transform 0.18s ease, box-shadow 0.18s ease;
}

.swatch-dot:hover {
  transform: scale(1.08);
}

.swatch-dot.active {
  box-shadow: 0 0 0 2px #fff, 0 0 0 4px var(--ink);
}

.segmented-wrap {
  flex-wrap: wrap;
}

.select-like {
  display: flex;
  align-items: center;
  justify-content: space-between;
  width: 100%;
  min-height: 36px;
  color: #777;
}

.quote-card {
  position: relative;
  max-width: var(--max);
  margin: 0 auto;
  min-height: 340px;
  display: grid;
  place-items: center;
  border-radius: var(--radius);
  background: #d5d2cc;
  text-align: center;
  padding: 48px 80px;
}

.trust-row {
  display: flex;
  justify-content: center;
  align-items: center;
  gap: 42px;
  margin-bottom: 44px;
  color: rgba(0, 0, 0, 0.28);
  font-size: 20px;
  font-weight: 800;
}

.quote-card blockquote {
  max-width: 780px;
  margin: 0 auto 18px;
  font-size: 28px;
  line-height: 1.08;
  transition: opacity 0.18s ease;
}

.quote-controls {
  position: absolute;
  right: 32px;
  top: 50%;
  transform: translateY(-50%);
  display: grid;
  gap: 8px;
}

#applications {
  --project-card-h: 440px;
  --project-card-half: calc(var(--project-card-h) / 2);
}

.project-rail {
  --project-card-width: clamp(430px, 34vw, 560px);
  grid-auto-columns: var(--project-card-width);
  gap: 22px;
  padding-left: calc((100vw - var(--project-card-width)) / 2);
  padding-right: calc((100vw - var(--project-card-width)) / 2);
}

#applications .rail-head {
  position: relative;
}

#applications .rail-actions {
  top: var(--project-card-half);
  z-index: 10;
  display: block;
}

#applications .rail-actions .circle-arrow {
  width: 46px;
  height: 46px;
  border: 0;
  background: rgba(112, 112, 112, 0.88);
  color: #fff;
  opacity: 1;
  pointer-events: auto;
}

#applications .rail-actions .circle-arrow:first-child {
  left: clamp(120px, 15vw, 330px);
}

#applications .rail-actions .circle-arrow:last-child {
  right: clamp(120px, 15vw, 330px);
}

#applications .rail-actions .circle-arrow:hover,
#applications .rail-actions .circle-arrow:focus-visible,
#applications .rail-actions .circle-arrow:active,
#applications .rail-actions .circle-arrow.is-active {
  background: rgba(112, 112, 112, 0.98);
  opacity: 1;
}

.project-card {
  position: relative;
  height: var(--project-card-h);
  overflow: hidden;
  border-radius: 18px;
  scroll-snap-align: start;
  background: #ddd;
  border: 0;
  padding: 0;
  cursor: pointer;
  text-align: left;
}

#projectRail .project-card {
  scroll-snap-align: center;
}

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

.project-card strong {
  position: absolute;
  left: 20px;
  bottom: 18px;
  z-index: 2;
  padding: 8px 12px;
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.86);
  font-size: 13px;
}

.project-card::after {
  content: attr(data-view-label);
  position: absolute;
  right: 18px;
  bottom: 18px;
  z-index: 2;
  display: grid;
  place-items: center;
  width: 34px;
  height: 34px;
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.9);
  color: #050505;
  font-size: 10px;
  font-weight: 700;
  opacity: 0;
  transform: translateX(8px);
  transition: opacity 0.2s ease, transform 0.2s ease;
}

.project-card:hover::after,
.project-card:focus-visible::after {
  opacity: 1;
  transform: translateX(0);
}

.tech-panel {
  max-width: var(--max);
  margin: 0 auto;
  padding: 82px 60px 70px;
  border-radius: var(--radius);
  background: var(--stone);
  color: #fff;
}

.tech-head {
  display: grid;
  grid-template-columns: 0.9fr 1fr;
  gap: 80px;
  margin-bottom: 90px;
}

.tech-head h2 {
  margin: 0;
  font-size: 42px;
}

.tech-head p {
  margin: 0;
  font-size: 46px;
  font-weight: 700;
  line-height: 1.02;
}

.tech-cards {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 18px;
}

.tech-cards-grid {
  grid-template-columns: repeat(4, minmax(0, 1fr));
}

@media (max-width: 980px) {
  .tech-cards-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (max-width: 560px) {
  .tech-cards-grid {
    grid-template-columns: 1fr;
  }
}

.tech-card {
  position: relative;
  min-height: 270px;
  overflow: hidden;
  border-radius: 12px;
  background: #8b8b88;
  border: 0;
  color: #fff;
  cursor: pointer;
  padding: 0;
  text-align: left;
}

.tech-card img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.tech-card::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, rgba(0, 0, 0, 0.05), rgba(0, 0, 0, 0.54));
}

.tech-card h3 {
  position: absolute;
  left: 20px;
  right: 20px;
  bottom: 48px;
  z-index: 2;
  margin: 0;
  font-size: 25px;
  line-height: 1;
}

.tech-card .tiny-pill {
  position: absolute;
  left: 20px;
  bottom: 18px;
  z-index: 2;
}

.spec-rail {
  display: grid;
  grid-auto-flow: row;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 34px;
  width: auto;
  margin: 0;
  overflow: visible;
  padding: 0;
}

.spec-rail::-webkit-scrollbar {
  display: none;
}

.spec-tabs {
  max-width: none;
  margin: -18px 0 36px;
  display: flex;
  gap: 8px;
  overflow-x: auto;
  scrollbar-width: none;
}

#specs .rail-actions {
  display: none;
}

.spec-tabs::-webkit-scrollbar {
  display: none;
}

.spec-tabs button {
  min-width: 92px;
  min-height: 34px;
  border: 1px solid rgba(0, 0, 0, 0.12);
  border-radius: 999px;
  background: #fff;
  color: var(--muted);
  cursor: pointer;
  font-size: 12px;
}

.spec-tabs button.active {
  background: #050505;
  color: #fff;
}

.spec-card {
  scroll-snap-align: start;
}

.spec-title {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 50px;
}

.spec-icon {
  width: 32px;
  height: 58px;
  border: 3px solid #111;
  position: relative;
}

.spec-icon::after {
  content: "";
  position: absolute;
  left: 50%;
  top: 0;
  bottom: 0;
  width: 2px;
  background: #111;
}

.spec-title h2 {
  margin: 0;
  font-size: clamp(32px, 2.85vw, 52px);
  line-height: 0.9;
}

.spec-block h3 {
  margin: 0 0 22px;
  font-size: 14px;
}

.spec-block + .spec-block {
  margin-top: 34px;
}

.spec-logistics h3 {
  color: #424242;
}

.spec-table {
  display: grid;
  border-top: 1px solid var(--line);
}

.spec-row {
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  gap: 22px;
  min-height: 42px;
  align-items: center;
  border-bottom: 1px solid var(--line);
  font-size: 13px;
}

.spec-row span:first-child {
  color: var(--muted);
}

.spec-row span:last-child {
  font-weight: 700;
}

.spec-actions {
  display: flex;
  gap: 10px;
  margin-top: 28px;
}

.spec-actions .pill {
  border-color: #050505;
  background: transparent;
  font-weight: 500;
}

.detail-modal {
  position: fixed;
  inset: 0;
  z-index: 50;
  display: grid;
  place-items: center;
  padding: 28px;
  background: rgba(0, 0, 0, 0.48);
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.2s ease;
}

.detail-modal.open {
  opacity: 1;
  pointer-events: auto;
}

.detail-dialog {
  width: min(980px, 100%);
  max-height: min(720px, 92vh);
  display: grid;
  grid-template-columns: 1fr 0.9fr;
  overflow: hidden;
  border-radius: 22px;
  background: #f3f3f1;
  box-shadow: 0 24px 90px rgba(0, 0, 0, 0.28);
  transform: translateY(12px);
  transition: transform 0.2s ease;
}

.detail-modal.open .detail-dialog {
  transform: translateY(0);
}

.detail-media {
  min-height: 460px;
  background: #d7d6d1;
}

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

.detail-copy {
  display: grid;
  align-content: center;
  gap: 24px;
  padding: 54px;
}

.detail-copy h2 {
  margin: 0;
  font-size: 46px;
  line-height: 0.96;
}

.detail-copy p {
  margin: 0;
  color: #303030;
  line-height: 1.35;
}

.detail-copy ul {
  display: grid;
  gap: 11px;
  margin: 0;
  padding-left: 17px;
  color: #303030;
}

.modal-close {
  position: absolute;
  top: 22px;
  right: 22px;
  z-index: 2;
  background: #fff;
  color: #050505;
}

.drawer-row {
  display: flex;
  align-items: center;
  gap: 10px;
  flex-wrap: wrap;
}

.reveal-item {
  opacity: 0;
  --reveal-y: 54px;
  --reveal-scale: 0.985;
  transform: translate3d(0, var(--reveal-y), 0) scale(var(--reveal-scale));
  transition: opacity 0.85s cubic-bezier(0.22, 1, 0.36, 1), transform 1s cubic-bezier(0.22, 1, 0.36, 1);
  transition-delay: var(--reveal-delay, 0ms);
  will-change: opacity, transform;
}

.feature-card.reveal-item,
.project-card.reveal-item,
.tech-card.reveal-item {
  opacity: 0;
  --reveal-y: 42px;
  --reveal-scale: 0.985;
  transform: perspective(900px) translate3d(0, calc(var(--reveal-y) + var(--lift)), 0) rotateX(var(--tilt-x)) rotateY(var(--tilt-y)) scale(var(--reveal-scale));
}

.reveal-item.is-visible,
.feature-card.reveal-item.is-visible,
.project-card.reveal-item.is-visible,
.tech-card.reveal-item.is-visible {
  opacity: 1;
  --reveal-y: 0px;
  --reveal-scale: 1;
}

.section.kinetic-band {
  transition: background-color 0.5s ease;
}

.model-letter,
.spec-icon {
  will-change: transform;
}

@media (prefers-reduced-motion: reduce) {
  html.motion-ready {
    scroll-behavior: smooth;
  }

  .reveal-item,
  .feature-card,
  .project-card,
  .tech-card {
    opacity: 1;
    transform: none;
    transition: none;
  }

  .hero-media,
  .hero-copy {
    transform: none !important;
  }
}

.sustain {
  padding-bottom: clamp(80px, 8vw, 140px);
}

.sustain-intro {
  max-width: var(--max);
  margin: 0 auto clamp(36px, 4vw, 60px);
  display: grid;
  gap: 14px;
}

.sustain-intro .eyebrow {
  margin: 0;
  font-size: 13px;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: rgba(0, 0, 0, 0.55);
}

.sustain-intro h2 {
  margin: 0;
  font-size: clamp(34px, 4.2vw, 60px);
  line-height: 1.02;
  letter-spacing: -0.01em;
}

.sustain-intro p {
  margin: 0;
  max-width: 640px;
  font-size: clamp(17px, 1.4vw, 20px);
  line-height: 1.45;
  color: rgba(0, 0, 0, 0.62);
}

.sustain-grid {
  max-width: var(--max);
  margin: 0 auto;
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: clamp(18px, 1.6vw, 24px);
}

.sustain-item {
  display: flex;
  flex-direction: column;
  background: #fff;
  border: 1px solid var(--line);
  border-radius: 18px;
  overflow: hidden;
  transition: transform 0.25s ease, box-shadow 0.25s ease;
}

.sustain-item:hover {
  transform: translateY(-2px);
  box-shadow: 0 14px 36px rgba(0, 0, 0, 0.08);
}

.sustain-media {
  width: 100%;
  height: clamp(160px, 16vw, 220px);
  overflow: hidden;
  background: var(--soft);
}

.sustain-media img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
}

.sustain-copy {
  padding: 24px 26px 28px;
  display: grid;
  gap: 12px;
  flex: 1;
}

.sustain-copy h3 {
  margin: 0;
  font-size: clamp(20px, 1.8vw, 24px);
  line-height: 1.15;
  font-weight: 600;
}

.sustain-copy p {
  margin: 0;
  font-size: 14px;
  line-height: 1.55;
  color: rgba(0, 0, 0, 0.66);
}

@media (max-width: 980px) {
  .sustain-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (max-width: 640px) {
  .sustain-grid {
    grid-template-columns: 1fr;
  }
  .sustain-media {
    height: 180px;
  }
}

.cta {
  max-width: none;
  padding: clamp(72px, 7vw, 128px) var(--gutter) clamp(88px, 8vw, 144px);
  display: grid;
  gap: clamp(66px, 7vw, 108px);
}

.cta-main,
.cta-secondary {
  width: min(100%, var(--wide-max));
  max-width: none;
  margin: 0 auto;
  overflow: hidden;
  border-radius: clamp(24px, 2.6vw, 42px);
}

.cta-main {
  position: relative;
  display: grid;
  place-items: center;
  min-height: clamp(440px, 44vw, 780px);
  color: #fff;
  text-align: center;
  isolation: isolate;
}

.cta-main::after {
  content: "";
  position: absolute;
  inset: 0;
  z-index: 1;
  background: rgba(0, 0, 0, 0.2);
}

.cta-main > img {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center;
  filter: saturate(0.92);
}

.cta-main-content {
  position: relative;
  z-index: 2;
  display: grid;
  justify-items: center;
  gap: clamp(24px, 2.2vw, 40px);
  padding: clamp(42px, 7vw, 110px);
}

.cta-main h2 {
  margin: 0;
  max-width: 1200px;
  font-size: 116px;
  line-height: 0.94;
  letter-spacing: 0;
}

.cta-secondary {
  display: grid;
  grid-template-columns: minmax(0, 0.88fr) minmax(0, 1.12fr);
  min-height: clamp(360px, 34vw, 620px);
  background: var(--sand);
  color: #050505;
}

.cta-secondary-media {
  min-height: inherit;
  background: #f1f0eb;
}

.cta-secondary-media img {
  width: 100%;
  height: 100%;
  min-height: inherit;
  object-fit: cover;
  object-position: 48% 58%;
}

.cta-secondary-copy {
  display: grid;
  align-content: center;
  justify-items: start;
  padding: clamp(46px, 7vw, 150px);
}

.cta-secondary h3 {
  margin: 0 0 clamp(28px, 3vw, 52px);
  max-width: 820px;
  font-size: 70px;
  line-height: 1.03;
  letter-spacing: 0;
}

.cta-secondary .pill {
  background: #050505;
  color: #fff;
}

.footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
  max-width: var(--max);
  margin: 0 auto;
  padding: 0 0 42px;
  color: rgba(255, 255, 255, 0.78);
  font-size: 12px;
}

.footer a,
.footer span {
  color: inherit;
}

.footer a:hover,
.footer a:focus-visible {
  color: #fff;
}

.footer-links,
.footer-contact {
  display: flex;
  align-items: center;
  gap: 24px;
}

.language-link {
  border-bottom: 1px solid currentColor;
}

@media (max-width: 980px) {
  .site-nav {
    grid-template-columns: 1fr auto;
    padding: 18px 22px;
  }

  .nav-links {
    display: none;
  }

  .nav-actions .pill.outline {
    display: none;
  }

  .hero {
    min-height: 640px;
  }

  .hero-copy {
    left: 24px;
    right: 24px;
    bottom: 42px;
  }

  .hero h1 {
    font-size: 36px;
  }

  .section {
    padding: 74px 22px;
    scroll-margin-top: 76px;
  }

  .warm {
    width: calc(100% - 36px);
    margin: 58px auto;
    border-radius: 18px;
    min-height: auto;
    padding: 58px 18px 70px;
  }

  .section-title {
    font-size: 28px;
  }

  .brand-position {
    min-height: auto;
  }

  .position-grid {
    grid-template-columns: 1fr;
  }

  .keyword-panel span {
    min-height: 58px;
  }

  .rail,
  .feature-rail,
  .project-rail,
  .spec-rail {
    padding-left: var(--gutter);
    padding-right: var(--gutter);
  }

  #featureRail {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    width: auto;
    padding: 0;
  }

  #projectRail {
    --project-card-width: 78vw;
  }

  #specs .spec-rail {
    grid-template-columns: 1fr;
    padding: 0;
  }

  .rail-floater {
    right: 22px;
  }

  .rail-head {
    align-items: flex-start;
    margin-bottom: 28px;
  }

  .rail,
  .spec-rail {
    grid-auto-columns: 86vw;
  }

  .model-card {
    grid-template-columns: 1fr;
    min-height: 690px;
  }

  .model-copy {
    padding-top: 18px;
  }

  .model-image {
    height: 350px;
  }

  .model-image img {
    max-height: 330px;
  }

  .model-letter {
    font-size: 220px;
    bottom: 80px;
  }

  .config-shell {
    padding: 32px 22px;
  }

  .config-grid,
  .tech-head,
  .sustain-grid {
    grid-template-columns: 1fr;
    gap: 36px;
  }

  .config-grid {
    margin-top: 28px;
  }

  .preview-stage {
    min-height: auto;
  }

  .preview-box {
    height: 340px;
  }

  .preview-box img {
    max-height: 340px;
  }

  .config-summary {
    grid-template-columns: 1fr;
  }

  .quote-card {
    padding: 44px 24px;
  }

  .quote-card blockquote {
    font-size: 24px;
  }

  .quote-controls {
    position: static;
    transform: none;
    display: flex;
    justify-content: center;
    margin-top: 30px;
  }

  .trust-row {
    flex-wrap: wrap;
    gap: 20px;
    margin-bottom: 30px;
    font-size: 16px;
  }

  .tech-panel {
    padding: 48px 22px;
  }

  .tech-head {
    margin-bottom: 42px;
  }

  .tech-head h2 {
    font-size: 34px;
  }

  .tech-head p {
    font-size: 34px;
  }

  .tech-cards {
    grid-template-columns: 1fr;
  }

  .spec-title h2 {
    font-size: 46px;
  }

  .detail-dialog {
    grid-template-columns: 1fr;
    overflow-y: auto;
  }

  .detail-media {
    min-height: 280px;
  }

  .detail-copy {
    padding: 34px 26px;
  }

  .detail-copy h2 {
    font-size: 34px;
  }

  .cta {
    padding: 68px 18px 86px;
    gap: 58px;
  }

  .cta-main {
    min-height: 420px;
  }

  .cta-main h2 {
    font-size: 58px;
  }

  .cta-main-content {
    padding: 36px 24px;
  }

  .cta-secondary {
    grid-template-columns: 1fr;
    min-height: auto;
  }

  .cta-secondary-media {
    min-height: 280px;
  }

  .cta-secondary-copy {
    padding: 42px 28px 52px;
  }

  .cta-secondary h3 {
    font-size: 42px;
  }

  .footer,
  .footer-links,
  .footer-contact {
    align-items: flex-start;
    flex-direction: column;
  }
}

@media (max-width: 560px) {
  .brand {
    font-size: 18px;
  }

  .nav-actions .icon-btn {
    display: none;
  }

  .pill.blue {
    padding: 0 14px;
  }

  .hero h1 {
    font-size: 34px;
  }

  .position-copy h2 {
    font-size: 36px;
  }

  .position-copy p:last-child {
    font-size: 17px;
  }

  .cert-row {
    gap: 8px;
  }

  .feature-rail,
  .project-rail {
    grid-auto-columns: 78vw;
  }

  #featureRail {
    grid-template-columns: 1fr;
  }

  .spec-rail {
    grid-auto-columns: 88vw;
  }

  .spec-row {
    grid-template-columns: 1fr;
    gap: 6px;
    padding: 12px 0;
  }
}

#collection.sequence-showcase-ready {
  position: relative;
  --collection-object-height: min(calc(100vh - 140px), 720px);
  height: 100vh;
  min-height: 760px;
  overflow: hidden;
  padding: 0;
  background: var(--page);
  scroll-margin-top: 0;
}

#collection.sequence-showcase-ready #collectionRail {
  display: flex;
  align-items: center;
  gap: 0;
  width: max-content;
  height: 100%;
  margin: 0;
  overflow: visible;
  padding: 0 max(74px, calc(50vw - 790px)) 0;
  scroll-snap-type: none;
  scrollbar-width: none;
  transition: none;
  will-change: transform;
}

#collection.sequence-showcase-ready #collectionRail .model-card {
  position: relative;
  display: block;
  flex: 0 0 auto;
  width: auto;
  min-height: 0;
  height: var(--collection-object-height);
  overflow: visible;
  padding: 0;
  scroll-snap-align: none;
}

#collection.sequence-showcase-ready #collectionRail .model-card:not(:last-child) {
  margin-right: 60px;
}

#collection.sequence-showcase-ready #collectionRail .model-card:first-child {
  margin-right: 40px;
}

#collection.sequence-showcase-ready #collectionRail .model-card:nth-child(2) {
  margin-right: 24px;
}

#collection.sequence-showcase-ready #collectionRail .model-card:nth-child(3) {
  margin-right: 36px;
}

#collection.sequence-showcase-ready .model-copy {
  position: absolute;
  left: 0;
  top: 10px;
  z-index: 10;
  width: 405px;
  max-width: 405px;
  padding: 0;
}

#collection.sequence-showcase-ready .model-copy h2 {
  margin: 0 0 28px;
  font-size: 21px;
  line-height: 1.05;
  font-weight: 800;
}

#collection.sequence-showcase-ready .model-copy p {
  max-width: 340px;
  margin: 0 0 28px;
  font-size: clamp(20px, 1.25vw, 24px);
  line-height: 1.12;
}

#collection.sequence-showcase-ready .model-copy ul {
  display: grid;
  gap: 14px;
  margin: 0 0 28px;
  padding: 0 0 0 15px;
  font-size: 14px;
  line-height: 1.38;
}

#collection.sequence-showcase-ready .model-copy .pill {
  min-height: 36px;
  padding: 0 22px;
}

#collection.sequence-showcase-ready .model-letter {
  position: absolute;
  left: -0.06em;
  bottom: calc(4% + 0.102em);
  z-index: 0;
  color: #fff;
  font-size: clamp(150px, 17vw, 315px);
  font-weight: 900;
  letter-spacing: 0.06em;
  line-height: 0.68;
  white-space: nowrap;
  user-select: none;
}

#collection.sequence-showcase-ready #collectionRail .model-card:not(:first-child) .model-letter {
  bottom: calc(4% + 0.066em);
}

#collection.sequence-showcase-ready .model-image {
  position: relative;
  z-index: 5;
  display: flex;
  align-items: center;
  justify-content: flex-start;
  height: 100%;
  min-height: 0;
  margin: 0;
  padding-left: 405px;
  cursor: grab;
  touch-action: pan-y;
}

#collection.sequence-showcase-ready .model-card:not(:first-child) .model-image {
  padding-left: 440px;
}

#collection.sequence-showcase-ready .model-image::after,
#collection.sequence-showcase-ready .model-image > img,
#collection.sequence-showcase-ready .model-image .spin-orbit-controls {
  display: none;
}

#collection.sequence-showcase-ready .frame-sequence,
#collection.sequence-showcase-ready .frame-sequence canvas {
  display: block;
  width: auto;
  backface-visibility: hidden;
}

/* 各规格素材里产品在 frame 中占比不同(S1≈78%/M2≈82%/L4≈71%/XL6≈68%),
   用 transform 缩放补偿,让 4 个产品在网页中视觉高度统一,底部对齐 */
#collection.sequence-showcase-ready .frame-sequence {
  height: 91%;
  transform-origin: center bottom;
  transform: translateY(-4.4%);
  transition: transform 0.45s ease;
}

#collection.sequence-showcase-ready .frame-sequence canvas {
  height: 100%;
  transform: translateZ(0);
}

/* 临时对齐辅助线 — 红色虚线显示 L4 顶/底基线,对齐完告诉我删掉
   位置基于实际卡片高度 (--collection-object-height) 计算,在 section 垂直中心做偏移 */
#collection.sequence-showcase-ready::before,
#collection.sequence-showcase-ready::after {
  content: "";
  position: absolute;
  display: none;
  left: 0;
  right: 0;
  height: 0;
  border-top: 1.5px dashed rgba(220, 38, 38, 0.75);
  pointer-events: none;
  z-index: 200;
}
/* 底部辅助线 — 4 个产品脚底基线(从现位置略上移) */
#collection.sequence-showcase-ready::after {
  top: calc(50% + var(--collection-object-height) * 0.46);
}
/* 顶部辅助线 — 对齐到卡片顶部的 ZOOM S1/M2/L4/XL6 文字行 */
#collection.sequence-showcase-ready::before {
  top: calc(50% - var(--collection-object-height) * 0.45);
}

#collection.sequence-showcase-ready .model-image {
  align-items: flex-end;
  overflow: visible;
}

#collection.sequence-showcase-ready .rail-floater {
  position: absolute;
  inset: 0;
  z-index: 12;
  display: block;
  transform: none;
  pointer-events: none;
}

#collection.sequence-showcase-ready .rail-floater .circle-arrow {
  position: absolute;
  top: 50%;
  transform: translateY(-50%);
  width: 48px;
  height: 48px;
  border: 0;
  background: rgba(112, 112, 112, 0.46);
  color: #fff;
  box-shadow: 0 12px 28px rgba(0, 0, 0, 0.1);
  opacity: 0.72;
  pointer-events: auto;
  transition: opacity 0.28s ease, background-color 0.28s ease, transform 0.28s ease;
}

#collection.sequence-showcase-ready .rail-floater .circle-arrow:hover,
#collection.sequence-showcase-ready .rail-floater .circle-arrow:focus-visible,
#collection.sequence-showcase-ready .rail-floater .circle-arrow:active,
#collection.sequence-showcase-ready .rail-floater .circle-arrow.is-active {
  background: rgba(112, 112, 112, 0.88);
  opacity: 1;
}

#collection.sequence-showcase-ready .rail-floater .circle-arrow:first-child {
  left: max(34px, calc((100vw - 1580px) / 2 + 74px));
}

#collection.sequence-showcase-ready .rail-floater .circle-arrow:last-child {
  right: max(34px, calc((100vw - 1580px) / 2 + 74px));
}

#collection.sequence-showcase-ready .rail-floater .circle-arrow.is-disabled {
  opacity: 0;
  pointer-events: none;
  transform: translateY(-50%) scale(0.92);
}

@media (max-width: 980px) {
  #collection.sequence-showcase-ready {
    height: auto;
    min-height: 650px;
  }

  #collection.sequence-showcase-ready #collectionRail {
    padding: 86px 34px 44px;
  }

  #collection.sequence-showcase-ready #collectionRail .model-card {
    flex-basis: 86vw;
    width: 86vw;
    min-height: 590px;
  }

  #collection.sequence-showcase-ready #collectionRail .model-card:not(:last-child) {
    margin-right: 80px;
  }

  #collection.sequence-showcase-ready .model-copy {
    position: relative;
    top: auto;
    width: min(520px, 75vw);
    margin-bottom: 28px;
    opacity: 0;
    visibility: hidden;
    transition: opacity 0.35s ease, visibility 0.35s ease;
  }

  #collection.sequence-showcase-ready .model-card.is-centered .model-copy {
    opacity: 1;
    visibility: visible;
  }

  #collection.sequence-showcase-ready .model-copy p {
    max-width: none;
  }

  #collection.sequence-showcase-ready .model-letter {
    bottom: calc(4% + 0.102em);
    font-size: clamp(150px, 42vw, 300px);
  }

  #collection.sequence-showcase-ready #collectionRail .model-card:not(:first-child) .model-letter {
    bottom: calc(4% + 0.066em);
  }

  #collection.sequence-showcase-ready .model-image {
    height: 405px;
    min-height: 405px;
    padding-left: clamp(90px, 16vw, 150px);
  }
}

@media (max-width: 560px) {
  #collection.sequence-showcase-ready {
    min-height: 590px;
  }

  #collection.sequence-showcase-ready #collectionRail {
    padding-left: 20px;
    padding-right: 20px;
  }

  #collection.sequence-showcase-ready #collectionRail .model-card {
    flex-basis: 88vw;
    width: 88vw;
  }

  #collection.sequence-showcase-ready #collectionRail .model-card:not(:last-child) {
    margin-right: 36px;
  }

  #collection.sequence-showcase-ready .model-copy {
    width: 82vw;
  }

  #collection.sequence-showcase-ready .model-copy p {
    font-size: 19px;
  }

  #collection.sequence-showcase-ready .model-copy ul {
    font-size: 13px;
  }

  #collection.sequence-showcase-ready .model-letter {
    bottom: calc(4% + 0.102em);
    font-size: 210px;
  }

  #collection.sequence-showcase-ready #collectionRail .model-card:not(:first-child) .model-letter {
    bottom: calc(4% + 0.066em);
  }

  #collection.sequence-showcase-ready .model-image {
    height: 320px;
    min-height: 320px;
    padding-left: 78px;
  }

  #collection.sequence-showcase-ready .rail-floater .circle-arrow {
    width: 40px;
    height: 40px;
  }

  #collection.sequence-showcase-ready .rail-floater .circle-arrow:first-child {
    left: 16px;
  }

  #collection.sequence-showcase-ready .rail-floater .circle-arrow:last-child {
    right: 16px;
  }
}

#features.warm {
  --feature-title-y: clamp(96px, 6.5vw, 132px);
  --feature-title-h: clamp(32px, 2.35vw, 48px);
  --feature-card-h: clamp(440px, 26vw, 560px);
  --feature-card-half: calc(var(--feature-card-h) / 2);
  --feature-arrow-y: calc(var(--feature-title-y) + var(--feature-title-h) + 44px + var(--feature-card-half));
  --feature-title-side-pad: calc(var(--rail-arrow-side) + 72px);
  --feature-bottom-y: clamp(88px, 6vw, 124px);
  width: 100%;
  min-height: auto;
  margin: clamp(22px, 3.8vw, 58px) 0 clamp(22px, 3vw, 44px);
  padding: var(--feature-title-y) 0 var(--feature-bottom-y);
  overflow: hidden;
  border-radius: 0;
  background: var(--warm);
}

#features .rail-head {
  display: grid;
  width: 100%;
  max-width: none;
  margin: 0 0 44px;
  padding-left: var(--feature-title-side-pad);
  padding-right: var(--feature-title-side-pad);
  align-items: center;
  justify-content: center;
  text-align: center;
}

#features .rail-head .section-title {
  max-width: none;
  width: 100%;
  margin: 0;
  font-size: var(--feature-title-h);
  line-height: 1;
  text-align: center;
  white-space: nowrap;
}

#features .rail-actions {
  top: var(--feature-card-half);
  z-index: 40;
  display: block;
}

#features #featureRail {
  display: grid;
  grid-auto-flow: column;
  grid-auto-columns: clamp(300px, 18.55vw, 380px);
  grid-template-columns: none;
  gap: 20px;
  width: 100%;
  max-width: none;
  margin: 0;
  overflow-x: auto;
  overflow-y: hidden;
  padding: 0 max(28vw, var(--gutter)) 26px max(var(--gutter), calc(50vw - 500px));
  scroll-padding-left: max(var(--gutter), calc(50vw - 500px));
  scroll-snap-type: x mandatory;
}

#features .feature-card {
  height: var(--feature-card-h);
  border-radius: 20px;
  scroll-snap-align: start;
}

#features .feature-copy {
  left: 24px;
  right: 24px;
  bottom: 24px;
}

#features .feature-copy h3 {
  font-size: clamp(24px, 1.45vw, 31px);
}

#features .feature-copy p {
  min-height: 32px;
}

#features .rail-actions .circle-arrow {
  z-index: 41;
  display: grid;
  width: 46px;
  height: 46px;
  border: 0;
  background: rgba(112, 112, 112, 0.88);
  color: #fff;
  opacity: 1;
  pointer-events: auto;
  transition: opacity 0.28s ease, background-color 0.28s ease, transform 0.28s ease;
}

#features .rail-actions .circle-arrow:first-child {
  left: clamp(120px, 15vw, 330px);
}

#features .rail-actions .circle-arrow:last-child {
  right: clamp(120px, 15vw, 330px);
  visibility: visible;
}

#features .rail-actions .circle-arrow:hover,
#features .rail-actions .circle-arrow:focus-visible,
#features .rail-actions .circle-arrow:active,
#features .rail-actions .circle-arrow.is-active {
  background: rgba(112, 112, 112, 0.88);
  opacity: 1;
}

#features .rail-actions .circle-arrow.is-disabled {
  opacity: 0;
  pointer-events: none;
  transform: translateY(-50%) scale(0.92);
}

@media (max-width: 980px) {
  #features.warm {
    --feature-title-y: 76px;
    --feature-title-h: 30px;
    --feature-card-h: 430px;
    --feature-card-half: 215px;
    width: 100%;
    margin: 44px 0 32px;
    min-height: auto;
    padding: var(--feature-title-y) 0 82px;
    border-radius: 0;
  }

  #features .rail-head {
    padding-left: var(--gutter);
    padding-right: var(--gutter);
  }

  #features #featureRail {
    grid-auto-columns: min(72vw, 330px);
    padding-left: var(--gutter);
    padding-right: max(24vw, var(--gutter));
    scroll-padding-left: var(--gutter);
  }

  #features .feature-card {
    height: var(--feature-card-h);
  }

  #features .rail-actions {
    transform: none;
  }
}

@media (max-width: 560px) {
  #features.warm {
    --feature-title-h: 18px;
    --feature-title-side-pad: calc(var(--rail-arrow-side) + 24px);
    --feature-card-h: 390px;
    --feature-card-half: 195px;
  }

  #features #featureRail {
    grid-auto-columns: 78vw;
  }

  #features .feature-card {
    height: var(--feature-card-h);
  }

  #features .rail-actions .circle-arrow:first-child {
    left: 18px;
  }

  #features .rail-actions .circle-arrow:last-child {
    right: 18px;
  }
}

/* Shared rail polish: one visual system for arrows and one alignment grid. */
#applications .rail-head {
  padding-left: var(--rail-start);
  padding-right: var(--rail-start);
}

#features .rail-head {
  padding-left: var(--feature-title-side-pad);
  padding-right: var(--feature-title-side-pad);
}

#applications .rail-head {
  padding-left: max(0px, calc(var(--rail-start) - var(--gutter)));
  padding-right: max(0px, calc(var(--rail-start) - var(--gutter)));
}

#features #featureRail {
  padding-left: var(--rail-start);
  padding-right: max(28vw, var(--rail-start));
  scroll-padding-left: var(--rail-start);
}

.project-rail {
  padding-left: var(--rail-start);
  padding-right: max(24vw, var(--rail-start));
  scroll-padding-left: var(--rail-start);
}

#projectRail .project-card {
  scroll-snap-align: start;
}

#features .rail-actions .circle-arrow,
#applications .rail-actions .circle-arrow,
#collection.sequence-showcase-ready .rail-floater .circle-arrow,
.quote-controls .circle-arrow {
  width: 48px;
  height: 48px;
  border: 0;
  background: var(--arrow-bg);
  color: #fff;
  box-shadow: var(--arrow-shadow);
  opacity: 1;
  pointer-events: auto;
  transition: opacity 0.28s ease, background-color 0.28s ease, transform 0.28s ease;
}

#features .rail-actions .circle-arrow:first-child,
#applications .rail-actions .circle-arrow:first-child,
#collection.sequence-showcase-ready .rail-floater .circle-arrow:first-child {
  left: var(--rail-arrow-side);
}

#features .rail-actions .circle-arrow:last-child,
#applications .rail-actions .circle-arrow:last-child,
#collection.sequence-showcase-ready .rail-floater .circle-arrow:last-child {
  right: var(--rail-arrow-side);
}

#features .rail-actions .circle-arrow:hover,
#features .rail-actions .circle-arrow:focus-visible,
#features .rail-actions .circle-arrow:active,
#features .rail-actions .circle-arrow.is-active,
#applications .rail-actions .circle-arrow:hover,
#applications .rail-actions .circle-arrow:focus-visible,
#applications .rail-actions .circle-arrow:active,
#applications .rail-actions .circle-arrow.is-active,
#collection.sequence-showcase-ready .rail-floater .circle-arrow:hover,
#collection.sequence-showcase-ready .rail-floater .circle-arrow:focus-visible,
#collection.sequence-showcase-ready .rail-floater .circle-arrow:active,
#collection.sequence-showcase-ready .rail-floater .circle-arrow.is-active,
.quote-controls .circle-arrow:hover,
.quote-controls .circle-arrow:focus-visible,
.quote-controls .circle-arrow:active,
.quote-controls .circle-arrow.is-active {
  background: var(--arrow-bg-active);
  opacity: 1;
}

#features .rail-actions .circle-arrow.is-disabled,
#applications .rail-actions .circle-arrow.is-disabled,
#collection.sequence-showcase-ready .rail-floater .circle-arrow.is-disabled {
  opacity: 0;
  pointer-events: none;
  transform: translateY(-50%) scale(0.92);
}

.section.tight {
  padding-left: 0;
  padding-right: 0;
}

.quote-card {
  width: min(calc(100% - var(--frame-x) - var(--frame-x)), var(--wide-max));
  max-width: none;
}

.quote-controls {
  position: absolute;
  inset: 0;
  display: block;
  margin: 0;
  transform: none;
  pointer-events: none;
}

.quote-controls .circle-arrow {
  position: absolute;
  top: 50%;
  transform: translateY(-50%);
}

.quote-controls .circle-arrow[data-quote-direction="prev"] {
  left: max(24px, calc((100% - var(--content-max)) / 2 + 20px));
}

.quote-controls .circle-arrow[data-quote-direction="next"] {
  right: max(24px, calc((100% - var(--content-max)) / 2 + 20px));
}

.quote-controls .circle-arrow.is-disabled {
  opacity: 0;
  pointer-events: none;
  transform: translateY(-50%) scale(0.92);
}

@media (max-width: 980px) {
  :root {
    --rail-start: var(--gutter);
    --rail-arrow-side: 22px;
  }

  #features .rail-head {
    padding-left: var(--feature-title-side-pad);
    padding-right: var(--feature-title-side-pad);
  }

  #applications .rail-head {
    padding-left: var(--gutter);
    padding-right: var(--gutter);
  }

  #features #featureRail,
  .project-rail {
    padding-left: var(--gutter);
    padding-right: max(24vw, var(--gutter));
    scroll-padding-left: var(--gutter);
  }

  .quote-card {
    width: calc(100% - var(--gutter) - var(--gutter));
  }

  .quote-controls .circle-arrow {
    width: 42px;
    height: 42px;
  }
}

@media (max-width: 560px) {
  :root {
    --rail-arrow-side: 18px;
  }

  .quote-card {
    padding-left: 58px;
    padding-right: 58px;
  }

  .quote-controls .circle-arrow[data-quote-direction="prev"] {
    left: 14px;
  }

  .quote-controls .circle-arrow[data-quote-direction="next"] {
    right: 14px;
  }

  #features .rail-actions .circle-arrow,
  #applications .rail-actions .circle-arrow,
  #collection.sequence-showcase-ready .rail-floater .circle-arrow {
    width: 40px;
    height: 40px;
  }
}

/* ===== Contact page (PPT last page style) ===== */
.contact-page {
  background: #050505;
  color: #fff;
  padding-left: 0;
  padding-right: 0;
}

.contact-page .contact-grid {
  width: 100%;
  max-width: var(--max);
  margin: 0 auto;
  padding: 0 var(--gutter);
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 1.2fr);
  grid-template-areas:
    "headline info"
    "qrs info";
  column-gap: clamp(40px, 6vw, 96px);
  row-gap: clamp(36px, 5vw, 64px);
  align-items: start;
}

.contact-headline {
  grid-area: headline;
  display: flex;
  flex-direction: column;
  gap: 14px;
}

.contact-headline .eyebrow {
  margin: 0;
  font-size: 14px;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  opacity: 0.72;
}

.contact-headline h2 {
  margin: 0;
  font-size: clamp(48px, 6.6vw, 96px);
  line-height: 0.96;
  letter-spacing: 0.02em;
  font-weight: 300;
}

.contact-website {
  margin-top: 24px;
  display: inline-block;
  font-size: clamp(18px, 1.6vw, 22px);
  font-weight: 500;
  color: #fff;
  text-decoration: none;
  border-bottom: 1px solid rgba(255, 255, 255, 0.4);
  padding-bottom: 4px;
  width: max-content;
  transition: border-color 0.25s ease, opacity 0.25s ease;
}

.contact-website:hover,
.contact-website:focus-visible {
  border-color: #fff;
  opacity: 0.9;
}

.contact-info {
  grid-area: info;
  display: grid;
  gap: 0;
}

.contact-block {
  padding: 28px 0;
  border-top: 1px solid rgba(255, 255, 255, 0.22);
}

.contact-block:first-child {
  border-top: none;
  padding-top: 0;
}

.contact-block h3 {
  margin: 0 0 18px;
  font-size: clamp(22px, 2vw, 28px);
  font-weight: 500;
  letter-spacing: 0.01em;
}

.contact-line {
  margin: 8px 0;
  font-size: clamp(15px, 1.05vw, 17px);
  line-height: 1.55;
  color: rgba(255, 255, 255, 0.82);
}

.contact-line a {
  color: #fff;
  text-decoration: none;
  border-bottom: 1px solid rgba(255, 255, 255, 0.3);
  padding-bottom: 2px;
  transition: border-color 0.2s ease;
}

.contact-line a:hover,
.contact-line a:focus-visible {
  border-color: #fff;
}

.contact-qrs {
  grid-area: qrs;
  display: flex;
  flex-wrap: wrap;
  gap: 24px;
}

.contact-qr {
  margin: 0;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 12px;
}

.contact-qr img {
  width: clamp(120px, 13vw, 168px);
  height: clamp(120px, 13vw, 168px);
  background: #fff;
  padding: 8px;
  border-radius: 8px;
  object-fit: contain;
  display: block;
}

.contact-qr figcaption {
  font-size: 13px;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  opacity: 0.78;
}

@media (max-width: 900px) {
  .contact-page .contact-grid {
    grid-template-columns: 1fr;
    grid-template-areas:
      "headline"
      "info"
      "qrs";
    row-gap: clamp(28px, 5vw, 56px);
  }

  .contact-qrs {
    justify-content: flex-start;
  }
}