:root {
  --ink: #08203a;
  --ink-soft: #243a54;
  /* Deepened primary: the old teal is pulled darker and bluer so the whole
     site reads as a deep-blue engineering brand rather than teal. */
  --blue: #0c5f8f;
  --cyan: #0e6f9e;
  --ice: rgb(8 30 52 / 5%);
  --mist: rgb(8 30 52 / 9%);
  --line: #bcd4ea;
  /* Tinted surface — replaces pure white per user preference ("我不喜欢白色").
     Every former #ffffff panel now uses this light sky-blue wash. */
  --surface: #e4f0fa;
  --white: #eef4fb;
  /* Engineering grid that sits across the whole page background. */
  --grid: #b3d2ec;
  /* Dark-blue divider drawn between major page sections. */
  --divider: #0a3f6e;
  /* Sky-blue page background — clearly blue, not white. Each page section then
     gets its own tint (below) so the bands read as distinct colour blocks. */
  --tint-about: #d7ebf9;
  --tint-tech: #e1eef9;
  --tint-products: #c8e1f3;
  --tint-contact: #dfecf8;
  --tint-enquiry: #d2e5f4;
  --bg-page:
    radial-gradient(1100px 760px at 84% -10%, rgb(70 160 210 / 16%), transparent 60%),
    radial-gradient(1000px 760px at -8% 12%, rgb(150 200 230 / 14%), transparent 58%),
    radial-gradient(1100px 820px at 50% 122%, rgb(40 130 185 / 15%), transparent 60%),
    linear-gradient(180deg, #cfe8f8 0%, #bcdcf0 50%, #cfe8f8 100%),
    linear-gradient(var(--grid) 1px, transparent 1px),
    linear-gradient(90deg, var(--grid) 1px, transparent 1px);
  --muted: #48647f;
  --navy: #06182c;
  --page-width: 1380px;
  --font-sans: "Segoe UI", -apple-system, BlinkMacSystemFont, Roboto, "Helvetica Neue", Arial, sans-serif;
  --font-mono: Consolas, ui-monospace, "SF Mono", Menlo, "Roboto Mono", monospace;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
  background-color: #bfe0f0;
  background-image: var(--bg-page);
  background-size: 100% 100%, 100% 100%, 100% 100%, 100% 100%, 40px 40px, 40px 40px;
  background-attachment: fixed;
}

body {
  margin: 0;
  min-width: 320px;
  overflow-x: hidden;
  color: var(--ink);
  background: transparent;
  font-family: var(--font-sans);
  -webkit-font-smoothing: antialiased;
}

a,
button {
  -webkit-tap-highlight-color: transparent;
}

a:focus-visible,
button:focus-visible {
  outline: 2px solid var(--blue);
  outline-offset: 4px;
}

.skip-link {
  position: fixed;
  z-index: 100;
  top: 10px;
  left: 10px;
  padding: 10px 14px;
  color: var(--white);
  background: var(--ink);
  transform: translateY(-150%);
}

.skip-link:focus {
  transform: translateY(0);
}

.container {
  width: min(calc(100% - 72px), var(--page-width));
  margin-inline: auto;
}

.site-header {
  position: sticky;
  z-index: 50;
  top: 0;
  background: rgb(213 232 246 / 0.86);
  border-bottom: 1px solid var(--line);
  backdrop-filter: blur(16px);
}

.header-inner {
  display: grid;
  grid-template-columns: minmax(220px, 1fr) auto minmax(220px, 1fr);
  align-items: center;
  height: 76px;
}

.brand {
  display: inline-flex;
  flex-direction: column;
  width: max-content;
  color: var(--ink);
  text-decoration: none;
}

.brand img {
  display: block;
  width: 154px;
  height: 54px;
  object-fit: contain;
  object-position: center;
  mix-blend-mode: multiply;
}

.brand-cn {
  font-size: 17px;
  font-weight: 800;
  line-height: 1;
}

.brand-en {
  margin-top: 5px;
  color: #4f647c;
  font: 8px/1.2 var(--font-mono);
}

.site-menu {
  display: flex;
  gap: 32px;
  align-items: center;
}

.site-menu a {
  position: relative;
  color: var(--muted);
  font-size: 14px;
  font-weight: 600;
  text-decoration: none;
}

.product-menu {
  position: relative;
}

.product-menu-trigger {
  display: flex;
  gap: 8px;
  align-items: center;
  padding: 0;
  color: var(--muted);
  background: transparent;
  border: 0;
  font: inherit;
  font-size: 14px;
  font-weight: 600;
  cursor: pointer;
}

.product-menu-trigger::after {
  width: 6px;
  height: 6px;
  border-right: 1px solid currentcolor;
  border-bottom: 1px solid currentcolor;
  content: "";
  transform: translateY(-2px) rotate(45deg);
  transition: transform 180ms ease;
}

.product-menu.is-open .product-menu-trigger,
.product-menu-trigger:hover,
.product-menu-trigger:focus-visible {
  color: var(--blue);
}

.product-menu.is-open .product-menu-trigger::after {
  transform: translateY(2px) rotate(225deg);
}

.product-submenu {
  position: absolute;
  top: calc(100% + 20px);
  left: 50%;
  display: grid;
  width: 300px;
  padding: 8px;
  visibility: hidden;
  background: var(--surface);
  border: 1px solid var(--line);
  box-shadow: 0 20px 44px rgb(4 20 48 / 12%);
  opacity: 0;
  transform: translate(-50%, -8px);
  transition: opacity 180ms ease, transform 180ms ease, visibility 180ms;
}

.product-menu.is-open .product-submenu {
  visibility: visible;
  opacity: 1;
  transform: translate(-50%, 0);
}

.product-submenu a {
  display: grid;
  gap: 4px;
  padding: 15px 16px;
  color: var(--navy);
  border-bottom: 1px solid var(--line);
}

.product-submenu a:last-child { border-bottom: 0; }
.product-submenu a::after { display: none; }
.product-submenu a:hover,
.product-submenu a:focus-visible { background: var(--blue); }
.product-submenu strong { font-size: 15px; }
.product-submenu span { color: #4f647c; font-size: 12px; font-weight: 400; }
.product-submenu a:hover span,
.product-submenu a:focus-visible span { color: var(--navy); }

.site-menu a::after {
  position: absolute;
  right: 0;
  bottom: -9px;
  left: 0;
  height: 1px;
  background: var(--blue);
  content: "";
  transform: scaleX(0);
  transform-origin: right;
  transition: transform 220ms ease;
}

.site-menu a:hover::after,
.site-menu a:focus-visible::after {
  transform: scaleX(1);
  transform-origin: left;
}

.header-action {
  justify-self: end;
  padding: 13px 17px;
  color: var(--white);
  background: var(--blue);
  font-size: 13px;
  font-weight: 700;
  text-decoration: none;
  transition: background 180ms ease, transform 180ms ease;
}

.header-action:hover {
  background: #2f81e6;
}

.header-action:active,
.button:active {
  transform: translateY(1px);
}

.menu-toggle {
  display: none;
}

.hero {
  position: relative;
  min-height: 92vh;
  display: flex;
  flex-direction: column;
  border-bottom: 2px solid var(--divider);
  overflow: hidden;
  background:
    radial-gradient(840px 480px at 82% -4%, rgb(120 196 224 / 26%), transparent 62%),
    radial-gradient(1150px 660px at 4% 104%, rgb(40 130 185 / 14%), transparent 60%),
    linear-gradient(180deg, #d9eefb 0%, #c4ddf0 60%, #d9eefb 100%);
}

/* faint engineering grid, fading out toward the edges */
.hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgb(7 27 60 / 5%) 1px, transparent 1px),
    linear-gradient(90deg, rgb(7 27 60 / 5%) 1px, transparent 1px);
  background-size: 54px 54px;
  -webkit-mask-image: radial-gradient(80% 74% at 50% 44%, #000 24%, transparent 100%);
  mask-image: radial-gradient(80% 74% at 50% 44%, #000 24%, transparent 100%);
  pointer-events: none;
}

.hero-headline {
  position: relative;
  z-index: 3;
  display: flex;
  justify-content: center;
  padding: clamp(52px, 10vh, 104px) 24px 0;
  pointer-events: none;
}

.eyebrow,
.section-index,
.technology-index,
.technology-sequence,
.visual-meta,
.machine-caption {
  margin: 0;
  color: var(--blue);
  font: 12px/1.4 var(--font-mono);
  letter-spacing: 0.04em;
}

.section-index {
  font-size: 18px;
  font-weight: 600;
  letter-spacing: 0.16em;
}

.eyebrow {
  margin-bottom: 28px;
}

.hero h1 {
  max-width: 18em;
  margin: 0 auto;
  color: var(--ink);
  font-size: clamp(40px, 4.8vw, 64px);
  font-weight: 400;
  line-height: 1.05;
  letter-spacing: -0.02em;
  text-align: center;
}

.hero h1 strong {
  display: inline-block;
  color: var(--blue);
  font-weight: 400;
  white-space: nowrap;
}

.hero-lede {
  max-width: 560px;
  margin: 34px 0 0;
  color: #324861;
  font-size: 19px;
  line-height: 1.75;
}

.hero-actions {
  display: flex;
  gap: 18px;
  align-items: center;
  margin-top: 34px;
}

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 46px;
  padding: 0 20px;
  font-size: 14px;
  font-weight: 700;
  text-decoration: none;
  white-space: nowrap;
  transition: background 180ms ease, transform 180ms ease;
}

.button-primary {
  color: var(--white);
  background: var(--blue);
}

.button-primary:hover {
  background: #155fcf;
}

.text-link {
  color: var(--ink);
  font-size: 14px;
  font-weight: 700;
  text-underline-offset: 6px;
}

.text-link span {
  display: inline-block;
  margin-left: 5px;
  color: var(--blue);
  transition: transform 180ms ease;
}

.text-link:hover span {
  transform: translate(3px, 3px);
}

.hero .text-link {
  color: var(--ink);
}

.hero .text-link span {
  color: var(--blue);
}

.hero-visual {
  position: relative;
  min-height: 610px;
  overflow: hidden;
  background: radial-gradient(circle at 51% 51%, #eaf6ff 0 9%, #cfe6f8 27%, transparent 58%);
  animation: visual-breathe 8s ease-in-out infinite;
}

.visual-meta {
  position: absolute;
  z-index: 4;
  top: 28px;
  right: 0;
  color: #4f647c;
}

.sensor-field {
  position: absolute;
  inset: 3% -7% 8% 1%;
}

.ambient-glow {
  position: absolute;
  top: 25%;
  left: 32%;
  width: 310px;
  height: 310px;
  border-radius: 50%;
  background: radial-gradient(circle, rgb(92 214 255 / 48%), rgb(89 144 255 / 17%) 44%, transparent 69%);
  filter: blur(15px);
  animation: glow-pulse 5s ease-in-out infinite;
}

.orbit {
  position: absolute;
  border: 1px solid rgb(49 128 237 / 47%);
  border-radius: 50%;
  transform-origin: 50% 50%;
  animation: orbit-drift 14s linear infinite;
}

.orbit-a {
  top: 23%;
  left: 3%;
  width: 88%;
  height: 43%;
  transform: rotate(-13deg);
}

.orbit-b {
  top: 11%;
  left: 21%;
  width: 59%;
  height: 68%;
  transform: rotate(-12deg);
  opacity: 0.62;
  animation-duration: 19s;
  animation-direction: reverse;
}

.orbit-c {
  top: 36%;
  left: 0;
  width: 97%;
  height: 25%;
  transform: rotate(8deg);
  opacity: 0.42;
  animation-duration: 11s;
}

.sensor-core {
  position: absolute;
  top: 32%;
  left: 42%;
  width: 190px;
  height: 190px;
  border: 1px solid rgb(255 255 255 / 70%);
  border-radius: 49% 51% 45% 55%;
  background: linear-gradient(145deg, #ffffff 3%, #bfd5e8 55%, #526985 100%);
  box-shadow: 0 40px 95px rgb(10 96 104 / 22%);
  transform: rotate(-10deg);
  animation: core-float 6s ease-in-out infinite;
}

.sensor-core span {
  position: absolute;
  top: 50%;
  left: 50%;
  width: 76px;
  height: 76px;
  border-radius: 50%;
  background: radial-gradient(circle, #fff 0 10%, #7fd0d4 12% 24%, #0e6a71 26% 41%, #07142c 43% 58%, #d7e8f7 60%);
  transform: translate(-50%, -50%);
  animation: core-scan 2.8s ease-in-out infinite;
}

.vector {
  position: absolute;
  z-index: 3;
  height: 2px;
  background: var(--blue);
  transform: rotate(-10deg);
}

.vector-a {
  top: 58%;
  left: 31%;
  width: 38%;
}

.vector-b {
  top: 64%;
  left: 54%;
  width: 30%;
  background: var(--cyan);
}

.decision-route {
  position: absolute;
  right: 0;
  bottom: 72px;
  width: 68%;
  height: 70px;
  border-top: 1px solid var(--blue);
  transform: skewY(-7deg);
}

.route-node {
  position: absolute;
  top: -5px;
  width: 9px;
  height: 9px;
  border-radius: 50%;
  background: var(--blue);
  box-shadow: 0 0 0 6px rgb(10 96 104 / 12%);
  animation: node-pulse 2.4s ease-in-out infinite;
}

.node-one { left: 18%; }
.node-two { left: 55%; }
.node-three { left: 89%; }
.node-two { animation-delay: 0.35s; }
.node-three { animation-delay: 0.7s; }

.route-label {
  position: absolute;
  top: 17px;
  color: #4f647c;
  font: 10px var(--font-mono);
}

.label-one { left: 14%; }
.label-two { left: 49%; }
.label-three { left: 86%; }

.section {
  padding-block: 108px;
}

.about {
  background: var(--tint-about);
  border-bottom: 2px solid var(--divider);
}

.about .section-heading {
  margin-bottom: 48px;
  text-align: center;
}

/* The original left column was sized for the Chinese heading "让机器感知环境，"
   — seven characters. The English clause "Machines that read the ground," is
   764px, roughly 1.9x wider, so inside a 510px column the intended two lines
   shattered into four with 55% / 58% fill. Give the heading the full measure and
   cap it just past its longest clause so both lines stay intact. */
.about .section-heading h2 {
  max-width: 22em;
  margin-inline: auto;
  text-align: center;
}

.section-heading h2,
.contact h2 {
  margin: 24px 0 0;
  font-size: clamp(36px, 4vw, 58px);
  font-weight: 400;
  line-height: 1.02;
  letter-spacing: -0.021em;
  text-align: center;
}

.section-heading h2 strong {
  color: var(--blue);
  font-weight: 400;
}

/* Measured sweep: at the full 1368px the columns run 76 characters per line and
   leave a 36% orphan last line. 1250px puts both paragraphs at 69 characters and
   three lines, and sits inside the stable 1220-1280 band — a neighbouring value
   such as 1210 balances better but flips to a four-line paragraph if any browser
   measures the text a fraction wider. */
.about-copy {
  display: grid;
  grid-template-columns: 1fr;
  gap: 28px;
  max-width: 840px;
  margin-inline: auto;
  align-content: start;
  text-align: center;
}

.about-copy h3 {
  margin: 0 0 20px;
  font: 12px var(--font-mono);
}

.about-copy p,
.platform-copy > p:last-child {
  margin: 0;
  color: #4f647c;
  font-size: 17px;
  line-height: 1.9;
}

.about-copy p {
  text-align: center;
}

.technology {
  background: var(--tint-tech);
  border-bottom: 2px solid var(--divider);
}

.technology-head {
  display: block;
  margin-bottom: 42px;
  text-align: center;
}

.technology-head h2 {
  margin: 20px 0 0;
  font-size: clamp(30px, 3.1vw, 46px);
  font-weight: 400;
  letter-spacing: -0.021em;
}

.technology-sequence {
  color: #4f647c;
}

.technology-grid {
  display: grid;
  /* Three equal columns — the user wants the three photos rendered the same
     size (the old 0.9/1.18/0.9 split made the middle image wider). */
  grid-template-columns: repeat(3, 1fr);
  gap: 12px;
}

.technology-item {
  position: relative;
  min-height: 390px;
  overflow: hidden;
  padding: 30px;
  background: var(--surface);
  border: 1px solid var(--line);
}

.technology-featured {
  color: var(--white);
  background: linear-gradient(145deg, var(--navy), #124389);
  border-color: #124389;
}

/* Smaller frame + contain fit, so the whole machine is visible instead of
   being cropped (user: 把图片缩小，这一整个产品都能够看清楚). */
.technology-media {
  aspect-ratio: 4 / 3;
  overflow: hidden;
  margin-bottom: 26px;
  padding: 16px;
  background: var(--ice);
  border: 1px solid var(--line);
}

.technology-media img {
  width: 100%;
  height: 100%;
  object-fit: contain;
  padding: 18px;
  display: block;
  transition: transform 700ms cubic-bezier(.2, .7, .2, 1);
}

.technology-item:hover .technology-media img {
  transform: scale(1.04);
}

.technology-item h3 {
  margin: 0 0 14px;
  font-size: 24px;
  letter-spacing: -0.015em;
  text-align: center;
}

.technology-item > p:last-child {
  max-width: 440px;
  margin: 0 auto;
  color: #4f647c;
  font-size: 19px;
  line-height: 1.85;
  text-align: center;
}

.technology-featured > p:last-child {
  color: #c5d9f2;
}

.products {
  padding-bottom: 0;
  overflow: hidden;
  background: var(--tint-products);
  border-bottom: 2px solid var(--divider);
}

.products-intro {
  display: grid;
  grid-template-columns: 1fr;
  gap: 22px;
  justify-items: center;
  text-align: center;
  max-width: 920px;
  margin-inline: auto;
  padding-bottom: 84px;
}

.products-intro h2 {
  margin: 0;
  font-size: clamp(38px, 4.2vw, 60px);
  font-weight: 400;
  line-height: 1.04;
  letter-spacing: -0.021em;
  text-align: center;
}

.products-intro h2 strong {
  color: var(--blue);
  font-weight: 400;
}

.products-intro > p:last-child {
  max-width: 640px;
  margin: 0 auto;
  text-align: center;
  color: #4f647c;
  font-size: 17px;
  line-height: 1.8;
}

/* Two equal columns: product copy on the left, the machine cutout on the right
   (user: 字在左边，产品在右边，一半一半). */
.product-story {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 40px;
  width: min(calc(100% - 72px), var(--page-width));
  margin: 0 auto 120px;
  /* stretch so the machine panel is exactly as tall as the copy/spec panel
     (user: 图片稍微大一点点，和表格一样大) */
  align-items: stretch;
}

.product-media {
  position: relative;
  min-width: 0;
  min-height: 420px;
  overflow: hidden;
  background: transparent;
  display: block;
}

.product-story .reveal {
  transition-delay: 0ms;
}

.product-media-wide {
  min-height: 0;
}

.product-media-detail {
  min-height: 0;
}

.product-media img {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
  transition: transform 900ms cubic-bezier(.2, .7, .2, 1);
}

.product-media:hover img {
  transform: scale(1.025);
}

.product-story-shennong-steed-ii .product-media-wide img {
  object-position: 55% center;
}

.product-story-shennong-steed-ii .product-media-detail img {
  object-position: 60% center;
}

/* The Rider scene photos place the machine on the right of the frame; pan the
   crop toward it so the cover crop reveals more of the vehicle, not the
   operator (user: 把车多露出来一点). */
.product-story-rider-light .product-media-wide img {
  object-position: 92% center;
}

.product-story-rider-heavy .product-media-wide img {
  object-position: 90% center;
}

.product-photo-meta {
  position: absolute;
  right: 20px;
  bottom: 18px;
  margin: 0;
  padding: 8px 10px;
  color: var(--navy);
  background: rgb(234 241 245 / 90%);
  font: 11px/1.2 var(--font-mono);
}

.product-content {
  display: flex;
  min-height: 0;
  padding: 44px 40px;
  flex-direction: column;
  color: var(--ink);
  background: var(--surface);
  border: 1px solid var(--line);
  box-shadow: 0 18px 40px rgb(7 27 60 / 8%);
  text-align: center;
}

.product-content h3,
.product-content .product-type,
.product-content .product-summary {
  text-align: center;
}

.product-features li {
  display: block;
  text-align: center;
  padding: 13px 0;
}

.product-features span {
  display: block;
  margin: 0 0 4px;
}

.product-specs dt,
.product-specs dd {
  text-align: center;
}

.story-spec {
  display: grid;
  grid-template-columns: 1fr;
  margin: 22px 0 6px;
  padding-top: 18px;
  border-top: 1px solid var(--line);
}
.story-spec div {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 10px;
  padding: 11px 0;
  border-bottom: 1px solid var(--line);
}
.story-spec dt { margin: 0; color: var(--muted); font: 13px var(--font-mono); text-align: left; }
.story-spec dd { margin: 0; font: 16px var(--font-sans); font-weight: 600; color: var(--ink); text-align: right; }

.product-link {
  justify-content: center;
  gap: 8px;
}

/* Right-hand machine panel for the 50/50 product story. The product photo is a
   cutout, so it floats on the light surface with a soft shadow (user: 把产品的图
   抠出来，图再放大一点). */
.product-figure {
  position: relative;
  min-height: 430px;
  background: var(--surface);
  border: 1px solid var(--line);
  box-shadow: 0 18px 40px rgb(7 27 60 / 8%);
}

/* The cutout is absolutely positioned inside the panel: it fills whatever height
   the row gets from the copy/spec card beside it (user: 图片和表格一样大) and
   never inflates the row with its own intrinsic height, which is what happened
   when it was a flow child with height:100% (the Rider stories became 1000px+
   tall with an empty text card). */
.product-figure img.is-cutout {
  position: absolute;
  inset: 26px;
  /* replaced elements size to their intrinsic pixels with auto width/height,
     so the box has to be given explicitly for object-fit to do anything */
  width: calc(100% - 52px);
  height: calc(100% - 52px);
  object-fit: contain;
  filter: drop-shadow(0 20px 18px rgb(8 30 52 / 16%));
}

.product-order {
  margin: 0;
  color: var(--blue);
  font: 12px/1.4 var(--font-mono);
}

.product-content h3 {
  margin: 28px 0 10px;
  font-size: clamp(30px, 2.9vw, 42px);
  font-weight: 400;
  line-height: 1.02;
  letter-spacing: -0.021em;
}

.product-type {
  margin: 0;
  color: #44597a;
  font-size: 16px;
}

.product-summary {
  margin: 22px 0 0;
  color: #324861;
  font-size: 16px;
  line-height: 1.7;
}

.product-features {
  display: grid;
  gap: 0;
  margin: auto 0 0;
  padding: 0;
  list-style: none;
  border-top: 1px solid rgba(7 27 60 / 12%);
}

.product-features li {
  display: grid;
  grid-template-columns: 34px 1fr;
  gap: 12px;
  padding: 12px 0;
  color: #2e4159;
  border-bottom: 1px solid rgba(7 27 60 / 12%);
  font-size: 16px;
  line-height: 1.5;
}

.product-features span {
  color: var(--blue);
  font: 12px var(--font-mono);
}

.product-link {
  display: inline-flex;
  justify-content: space-between;
  align-items: center;
  margin-top: 20px;
  padding-top: 16px;
  /* Was var(--white) — invisible on the light .product-content panel. */
  color: var(--ink);
  border-top: 1px solid rgba(7 27 60 / 12%);
  font-size: 16px;
  font-weight: 700;
  text-decoration: none;
}

.product-link span { color: var(--blue); transition: transform 180ms ease; }
.product-link:hover span { transform: translate(3px, -3px); }

.product-specs {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1px;
  margin: 18px 0 0;
  background: rgba(7 27 60 / 12%);
}

.product-specs div {
  padding: 11px 8px;
  background: var(--surface);
}

.product-specs dt {
  color: #4f647c;
  font-size: 13px;
}

.product-specs dd {
  margin: 7px 0 0;
  color: var(--ink);
  font: 16px var(--font-mono);
}

.product-future {
  padding-block: 100px;
  color: var(--ink);
  background: transparent;
}

.product-future-inner {
  display: grid;
  grid-template-columns: 1fr;
  gap: 24px;
  justify-items: center;
  text-align: center;
  max-width: 860px;
  margin-inline: auto;
}

.product-future h2 {
  margin: 0;
  font-size: clamp(32px, 3.6vw, 52px);
  font-weight: 400;
  line-height: 1.06;
  letter-spacing: -0.021em;
  text-align: center;
}

.product-future-inner > p:last-child {
  margin: 0 auto;
  max-width: 640px;
  text-align: center;
  color: #44597a;
  font-size: 16px;
  line-height: 1.8;
}

.button-light {
  width: max-content;
  margin-top: 28px;
  color: #ffffff;
  background: var(--navy);
  border: 1px solid var(--navy);
}

.platform {
  color: var(--white);
  background: var(--navy);
}

.platform-layout {
  display: grid;
  grid-template-columns: 0.72fr 1.28fr;
  gap: 7%;
  align-items: center;
}

.section-index-light {
  color: var(--cyan);
}

.platform-copy h2 {
  margin: 24px 0 28px;
  font-size: clamp(46px, 5.3vw, 76px);
  font-weight: 400;
  line-height: 0.95;
}

.platform-copy > p:last-child {
  color: #324861;
}

.platform-machine {
  position: relative;
  min-height: 480px;
  overflow: hidden;
  background: linear-gradient(145deg, rgb(255 255 255 / 4%), rgb(10 96 104 / 12%));
  border: 1px solid rgb(104 182 192 / 18%);
}

.machine-body {
  position: absolute;
  top: 25%;
  left: 13%;
  width: 74%;
  height: 42%;
  background: linear-gradient(145deg, #b5c5d2 0 16%, #63798b 16% 62%, #17283a 62%);
  clip-path: polygon(8% 18%, 72% 0, 100% 19%, 95% 70%, 76% 82%, 26% 100%, 0 75%);
  filter: drop-shadow(0 40px 40px rgb(0 0 0 / 28%));
  animation: machine-hover 7s ease-in-out infinite;
}

.machine-window {
  position: absolute;
  top: 18%;
  left: 24%;
  width: 43%;
  height: 38%;
  border: 13px solid rgba(255 255 255 / 12%);
  border-bottom-color: #0b2138;
  background: #123154;
  transform: skew(-12deg);
}

.machine-line {
  position: absolute;
  top: 69%;
  left: 10%;
  width: 80%;
  height: 3px;
  background: var(--blue);
  box-shadow: 0 16px 0 #25394a;
}

.machine-track {
  position: absolute;
  bottom: 5%;
  width: 31%;
  height: 11%;
  background: #0b1722;
}

.track-left { left: 14%; }
.track-right { right: 13%; }

.terrain-lines {
  position: absolute;
  right: -5%;
  bottom: 12%;
  left: -5%;
  height: 95px;
  border-top: 1px solid var(--blue);
  border-bottom: 1px solid rgb(104 182 192 / 24%);
  transform: skewY(-5deg);
  animation: terrain-scan 4.5s ease-in-out infinite;
}

.machine-caption {
  position: absolute;
  right: 22px;
  bottom: 20px;
  color: #8fb4df;
}

.platform-points {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  margin-top: 70px;
  border-top: 1px solid rgb(104 182 192 / 19%);
}

.platform-points article {
  min-height: 170px;
  padding: 30px 30px 0 0;
  border-right: 1px solid rgb(104 182 192 / 19%);
}

.platform-points article:not(:first-child) {
  padding-left: 30px;
}

.platform-points article:last-child {
  border-right: 0;
}

.platform-points span {
  color: var(--cyan);
  font: 10px var(--font-mono);
}

.platform-points h3 {
  margin: 24px 0 12px;
  font-size: 22px;
}

.platform-points p {
  max-width: 320px;
  margin: 0;
  color: #324861;
  font-size: 15px;
  line-height: 1.7;
}

.contact {
  display: grid;
  grid-template-columns: 1fr;
  gap: 40px;
  justify-items: center;
  text-align: center;
  max-width: 860px;
  margin-inline: auto;
  /* No separate panel — the contact band blends into the page sky-blue. */
  background: transparent;
  border-bottom: 2px solid var(--divider);
}

.contact-copy {
  align-self: start;
}

.contact .contact-copy h2 {
  font-size: clamp(34px, 3.4vw, 52px);
}

.contact-copy p {
  margin: 30px auto 0;
  max-width: 36em;
  text-align: center;
  color: var(--muted);
  font-size: 17px;
  line-height: 1.9;
}

.contact-location {
  display: flex;
  justify-content: center;
  gap: 18px;
  margin-top: 36px;
  padding-top: 20px;
  color: var(--blue);
  border-top: 1px solid var(--line);
  font: 10px var(--font-mono);
}

.contact-phone {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 6px;
  margin-top: 28px;
  padding: 22px 0;
  color: var(--ink);
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
  text-decoration: none;
}

.contact-phone span {
  color: var(--muted);
  font-size: 14px;
}

.contact-phone strong {
  color: var(--blue);
  font: 24px/1 var(--font-mono);
}

/* "腰斩" — the contact channels are split into two equal left/right halves,
   separated by a thin centre rule, so the band reads as a clean split rather
   than one centred block. */
.contact-split {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0 56px;
  width: 100%;
  max-width: 820px;
  margin: 4px auto 0;
}

.contact-col {
  display: flex;
  flex-direction: column;
  align-items: center;
}

.contact-col + .contact-col {
  border-left: 1px solid var(--line);
}

.contact-split .contact-phone,
.contact-split .contact-email,
.contact-split .contact-address,
.contact-split .contact-location {
  border: 0;
  margin: 0;
  padding: 14px 0;
}

.site-footer {
  background: var(--navy);
  border-top: 2px solid var(--divider);
}

.footer-inner {
  display: grid;
  grid-template-columns: 1fr auto 1fr;
  align-items: center;
  min-height: 104px;
  color: #9fbcd8;
  font: 11px var(--font-mono);
}

.footer-inner > div {
  display: flex;
  flex-direction: column;
  gap: 5px;
}

.footer-inner strong {
  color: #eaf3fb;
  font-family: inherit;
  font-size: 13px;
}

.footer-inner > p:last-child {
  justify-self: end;
}

.system-status {
  display: flex;
  gap: 9px;
  align-items: center;
}

.system-status i {
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--blue);
  box-shadow: 0 0 0 5px rgb(10 96 104 / 12%);
}

.reveal {
  opacity: 0;
  transform: translateY(22px);
  transition: opacity 650ms ease, transform 650ms ease;
}

.reveal.is-visible {
  opacity: 1;
  transform: translateY(0);
}

.reveal:nth-child(2) { transition-delay: 90ms; }
.reveal:nth-child(3) { transition-delay: 180ms; }

@keyframes visual-breathe { 0%, 100% { background-position: 50% 51%; } 50% { background-position: 53% 48%; } }
@keyframes glow-pulse { 0%, 100% { opacity: .72; transform: scale(.94); } 50% { opacity: 1; transform: scale(1.08); } }
@keyframes orbit-drift { from { rotate: 0deg; } to { rotate: 360deg; } }
@keyframes core-float { 0%, 100% { translate: 0 0; } 50% { translate: 0 -10px; } }
@keyframes core-scan { 0%, 100% { filter: brightness(1); } 50% { filter: brightness(1.35); } }
@keyframes node-pulse { 0%, 100% { box-shadow: 0 0 0 5px rgb(10 96 104 / 12%); } 50% { box-shadow: 0 0 0 10px rgb(10 96 104 / 0%); } }
@keyframes machine-hover { 0%, 100% { translate: 0 0; } 50% { translate: 0 -8px; } }
@keyframes terrain-scan { 0%, 100% { opacity: .45; translate: -2% 0; } 50% { opacity: 1; translate: 2% -7px; } }

@media (max-width: 1040px) {
  .header-inner {
    grid-template-columns: minmax(190px, 1fr) auto minmax(160px, 1fr);
  }

  .site-menu {
    gap: 20px;
  }

  .sensor-core {
    left: 39%;
  }

  .technology-item {
    padding: 24px;
  }

  /* Keep the three equal columns on tablet so the right photo stays visible;
     only tighten the heights so the narrower slabs do not run too tall. */
  .product-media-wide,
  .product-media-detail,
  .product-content { min-height: 460px; }
}

@media (max-width: 860px) {
  .container {
    width: min(calc(100% - 40px), var(--page-width));
  }

  .header-inner {
    grid-template-columns: 1fr auto;
    height: 68px;
  }

  .header-action {
    display: none;
  }

  .menu-toggle {
    position: relative;
    z-index: 53;
    display: grid;
    width: 42px;
    height: 42px;
    padding: 0;
    place-items: center;
    background: transparent;
    border: 1px solid var(--line);
  }

  .menu-toggle span {
    position: absolute;
    width: 18px;
    height: 1px;
    background: var(--ink);
    transition: transform 200ms ease, top 200ms ease;
  }

  .menu-toggle span:first-child { top: 16px; }
  .menu-toggle span:last-child { top: 24px; }
  .menu-toggle[aria-expanded="true"] span:first-child { top: 20px; transform: rotate(45deg); }
  .menu-toggle[aria-expanded="true"] span:last-child { top: 20px; transform: rotate(-45deg); }

  .site-menu {
    position: fixed;
    z-index: 52;
    top: 68px;
    right: 0;
    left: 0;
    display: grid;
    gap: 0;
    padding: 10px 20px 24px;
    background: var(--ice);
    border-bottom: 1px solid var(--line);
    opacity: 0;
    pointer-events: none;
    transform: translateY(-12px);
    transition: opacity 200ms ease, transform 200ms ease;
  }

  .site-menu.is-open {
    opacity: 1;
    pointer-events: auto;
    transform: translateY(0);
  }

  .site-menu a {
    padding: 16px 0;
    border-bottom: 1px solid var(--line);
    font-size: 16px;
  }

  .product-menu-trigger {
    justify-content: space-between;
    width: 100%;
    padding: 16px 0;
    border-bottom: 1px solid var(--line);
    font-size: 16px;
  }

  .product-submenu {
    position: static;
    width: 100%;
    max-height: 0;
    padding: 0;
    visibility: visible;
    overflow: hidden;
    box-shadow: none;
    opacity: 1;
    transform: none;
    transition: max-height 220ms ease;
  }

  .product-menu.is-open .product-submenu {
    max-height: 180px;
    transform: none;
  }

  .product-submenu a { padding: 14px 18px; border-color: rgb(255 255 255 / 12%); }

  .hero {
    min-height: 80vh;
  }

  .hero h1 {
    font-size: clamp(34px, 8.4vw, 52px);
  }

  .hero h1 strong {
    white-space: normal;
  }

  .sensor-field {
    inset: 0 -10% 7% -6%;
  }

  .sensor-core {
    top: 31%;
    left: 39%;
    width: 160px;
    height: 160px;
  }

  .about,
  .contact,
  .platform-layout,
  .products-intro,
  .product-future-inner {
    grid-template-columns: 1fr;
  }

  .products-intro {
    gap: 24px;
  }

  .product-story {
    grid-template-columns: 1fr;
    width: min(calc(100% - 40px), var(--page-width));
  }

  .product-content {
    min-height: 0;
  }

  .product-figure {
    min-height: 420px;
  }

  .product-future-inner {
    gap: 24px;
  }

  /* The heading is stacked above the copy now, so it owns the gap. */
  .about .section-heading {
    margin-bottom: 40px;
  }

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

  .technology-item {
    min-height: 320px;
  }

  .technology-symbol {
    margin-block: 30px;
  }

  .platform-copy {
    max-width: 650px;
  }

  .platform-machine {
    margin-top: 55px;
  }

  .contact-split {
    grid-template-columns: 1fr;
    gap: 36px 0;
  }

  .contact-col + .contact-col {
    border-left: 0;
    padding-top: 36px;
    border-top: 1px solid var(--line);
  }
}

@media (max-width: 600px) {
  .container {
    width: min(calc(100% - 36px), var(--page-width));
  }

  .brand-cn {
    font-size: 15px;
  }

  .brand-en {
    font-size: 7px;
  }

  .hero-copy {
    padding-top: 0;
  }

  .eyebrow {
    max-width: 240px;
    line-height: 1.5;
  }

  .hero h1 {
    font-size: clamp(35px, 10.6vw, 47px);
    line-height: 1.02;
  }

  .hero-lede {
    font-size: 17px;
  }

  .hero-actions {
    align-items: flex-start;
    flex-direction: column;
  }

  .visual-meta {
    top: 20px;
    font-size: 11px;
  }

  .sensor-core {
    top: 34%;
    left: 37%;
    width: 135px;
    height: 135px;
  }

  .sensor-core span {
    width: 58px;
    height: 58px;
  }

  .decision-route {
    bottom: 36px;
    width: 92%;
  }

  .section {
    padding-block: 76px;
  }

  .products {
    padding-bottom: 0;
  }

  .products-intro {
    padding-bottom: 56px;
  }

  .products-intro h2 {
    font-size: 34px;
  }

  .product-story {
    width: min(calc(100% - 36px), var(--page-width));
    margin-bottom: 76px;
  }

  .product-media-wide {
    min-height: 360px;
  }

  .product-content {
    min-height: 0;
    padding: 30px 24px;
  }

  .product-content h3 {
    margin-top: 40px;
    font-size: 31px;
  }

  .product-specs {
    grid-template-columns: repeat(2, 1fr);
  }

  .product-future {
    padding-block: 76px;
  }

  .contact-phone {
    align-items: center;
    flex-direction: column;
    gap: 14px;
  }

  .section-heading h2,
  .contact h2 {
    font-size: 32px;
  }

  .about-copy {
    grid-template-columns: 1fr;
    gap: 36px;
  }

  .technology-head {
    display: block;
  }

  .technology-sequence {
    margin-top: 18px;
  }

  .technology-item {
    min-height: 300px;
  }

  .platform-machine {
    min-height: 350px;
  }

  .machine-body {
    top: 28%;
    left: 4%;
    width: 92%;
  }

  .machine-window {
    border-width: 9px;
  }

  .machine-caption {
    right: 14px;
    bottom: 15px;
    left: 14px;
    font-size: 11px;
  }

  .platform-points {
    grid-template-columns: 1fr;
  }

  .platform-points article,
  .platform-points article:not(:first-child) {
    min-height: auto;
    padding: 28px 0;
    border-right: 0;
    border-bottom: 1px solid rgb(104 182 192 / 19%);
  }

  .platform-points article:last-child {
    border-bottom: 0;
  }

  .contact-location {
    align-items: flex-start;
    flex-direction: column;
    gap: 10px;
  }

  .footer-inner {
    grid-template-columns: 1fr;
    gap: 20px;
    padding-block: 30px;
  }

  .footer-inner > p:last-child {
    justify-self: start;
  }
}

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

  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    scroll-behavior: auto !important;
    transition-duration: 0.01ms !important;
  }

  .reveal {
    opacity: 1;
    transform: none;
  }
}