*,
*::before,
*::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

:root {
  --font: "Oakes Grotesk", "Helvetica Neue", Arial, system-ui, sans-serif;
  --color-text: #454545;
  --color-muted: #636363;
  --color-line: #dedede;
  --color-soft: #f3f3f6;
  --color-dark: #27313a;
  --brand-blue: #005fc4;
  --brand-blue-deep: #123f7a;
  --page-inline: 20px;
  --nav-inline: 20px;
  --section-v: 60px;
  --text-display: 64px;
  --text-h2: 28px;
  --text-h3: 20px;
  --text-h4: 15px;
  --text-body: 13px;
  --text-small: 11px;
  --ease: cubic-bezier(0.4, 0, 0.2, 1);
}

@media (min-width: 480px) {
  :root {
    --text-display: 100px;
    --text-h2: 32px;
    --text-h3: 20px;
    --text-h4: 16px;
    --text-body: 13px;
    --text-small: 12px;
    --page-inline: 40px;
    --nav-inline: 40px;
    --section-v: 80px;
  }
}

@media (min-width: 768px) {
  :root {
    --text-display: 18vw;
    --text-h2: 40px;
    --text-h3: 22px;
    --text-h4: 18px;
    --text-body: 13px;
    --text-small: 12px;
    --page-inline: 10vw;
    --nav-inline: 60px;
    --section-v: 160px;
  }
}

@media (min-width: 1860px) {
  :root {
    --text-display: 20vw;
    --text-h2: 48px;
    --text-h3: 24px;
    --text-h4: 20px;
    --text-body: 14px;
    --page-inline: 20vw;
    --nav-inline: 120px;
  }
}

html {
  min-height: 100%;
  font-family: var(--font);
  color: var(--color-text);
  background: #fff;
  font-feature-settings: "calt" 0, "liga" 0;
  -webkit-font-smoothing: antialiased;
  scroll-behavior: smooth;
}

body {
  min-width: 320px;
  overflow-x: hidden;
}

section {
  scroll-margin-top: 96px;
}

button,
input {
  font: inherit;
}

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

h2 {
  color: var(--color-text);
  font-size: var(--text-h2);
  font-weight: 300;
  line-height: 1.22;
}

h3 {
  color: var(--color-text);
  font-size: var(--text-h3);
  font-weight: 300;
  line-height: 1.22;
}

h4,
p {
  color: var(--color-muted);
  font-weight: 300;
  line-height: 1.45;
}

p {
  font-size: var(--text-body);
}

.loading-overlay {
  position: fixed;
  inset: 0;
  z-index: 9999;
  display: flex;
  align-items: center;
  justify-content: center;
  background: #fff;
  transition: opacity 0.35s var(--ease), visibility 0.35s var(--ease);
}

.loading-overlay.is-hidden {
  opacity: 0;
  visibility: hidden;
  pointer-events: none;
}

.loading-logo {
  width: 110px;
  height: auto;
  display: block;
  animation: loading-breathe 2.4s ease-in-out infinite;
}

@keyframes loading-breathe {
  0%,
  100% {
    opacity: 1;
    transform: scale(1);
  }
  50% {
    opacity: 0.35;
    transform: scale(0.97);
  }
}

.site-nav {
  position: fixed;
  top: 0;
  inset-inline: 0;
  z-index: 100;
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 82px;
  padding: 18px var(--nav-inline) 0;
}

.brand-mark,
.nav-actions {
  flex: 1;
}

.brand-mark {
  display: inline-flex;
  align-items: center;
  gap: 9px;
  width: fit-content;
  color: #29292b;
}

.brand-icon {
  display: block;
  flex: none;
  width: 42px;
  height: 64px;
  overflow: hidden;
  border-radius: 12px;
}

.brand-icon img {
  display: block;
  width: auto;
  height: 64px;
  max-width: none;
  transform: translateX(-2px);
  transform-origin: left center;
}

.brand-type {
  display: flex;
  flex-direction: column;
  gap: 4px;
  line-height: 1;
}

.brand-type span {
  font-size: 27px;
  font-weight: 600;
  letter-spacing: 0.13em;
}

.brand-type small {
  font-size: 9px;
  font-weight: 600;
  letter-spacing: 0.19em;
}

.nav-center {
  display: flex;
  align-items: center;
  gap: clamp(20px, 3vw, 40px);
  padding: 8px 20px;
  border-radius: 20px;
  background: rgba(255, 255, 255, 0.48);
  backdrop-filter: blur(16px);
}

.nav-center a,
.lang-btn {
  color: var(--color-text);
  white-space: nowrap;
  font-size: var(--text-small);
  font-weight: 400;
  line-height: 1.2;
  transition: opacity 0.2s var(--ease), transform 0.2s var(--ease);
}

.nav-center a:not(.active) {
  opacity: 0.62;
}

.nav-actions {
  display: flex;
  justify-content: flex-end;
  align-items: center;
  gap: 6px;
}

.lang-btn {
  appearance: none;
  border: 0;
  border-radius: 100px;
  background: rgba(255, 255, 255, 0.56);
  cursor: pointer;
  padding: 8px 13px;
}

.lang-btn.is-active {
  color: #fff;
  background: var(--color-dark);
}

.hero {
  position: relative;
  height: 460vh;
}

.hero-sticky {
  position: sticky;
  top: 0;
  height: 100vh;
  overflow: hidden;
  background: linear-gradient(#f3f3f6, #fff);
}

.hero-backdrop {
  position: absolute;
  top: 50%;
  left: 50%;
  z-index: 0;
  width: 100%;
  color: transparent;
  background: linear-gradient(180deg, var(--brand-blue-deep) 0%, var(--brand-blue) 44%, #dceaff 100%);
  background-clip: text;
  -webkit-background-clip: text;
  opacity: calc(0.62 * var(--hero-backdrop-opacity, 1));
  text-align: center;
  font-size: var(--text-display);
  font-weight: 500;
  line-height: 1;
  white-space: nowrap;
  transform: translate(-50%, -54%);
}

.model-wrap {
  position: absolute;
  inset: 0;
  z-index: 3;
}

.mobile-product-video {
  display: none;
}

#productCanvas {
  display: block;
  width: 100%;
  height: 100%;
  touch-action: pan-y;
}

@media (max-width: 699px) {
  .mobile-product-video {
    display: block;
    position: absolute;
    inset: 0;
    width: 100%;
    height: 100%;
    background: #f6f6f8;
    object-fit: contain;
    object-position: center;
  }

  #productCanvas,
  .model-status {
    display: none;
  }
}

.hero-sticky.mobile-hero-finished {
  --hero-copy-opacity: 1;
  --hero-backdrop-opacity: 0;
}

.model-status {
  position: absolute;
  top: 24px;
  right: 24px;
  color: rgba(69, 69, 69, 0.65);
  font-size: var(--text-small);
  opacity: 0;
  transition: opacity 0.25s var(--ease);
}

.model-status.is-visible {
  opacity: 1;
}

.hero-copy {
  position: absolute;
  inset: 0;
  z-index: 5;
  display: flex;
  flex-direction: column;
  justify-content: flex-end;
  align-items: flex-start;
  gap: clamp(18px, 3.5vw, 50px);
  padding: 0 var(--page-inline) var(--section-v);
  opacity: var(--hero-copy-opacity, 0);
  pointer-events: none;
  transform: translateY(calc(36px * (1 - var(--hero-copy-opacity, 0))));
  transition: opacity 0.12s linear, transform 0.12s linear;
}

.hero-copy h2 {
  display: flex;
  align-items: flex-start;
  gap: clamp(8px, 1.5vw, 15px);
  font-size: clamp(28px, 4.2vw, 58px);
  font-weight: 400;
  line-height: 1.22;
}

.hero-copy h2 span:last-child {
  color: transparent;
  background: linear-gradient(180deg, var(--brand-blue-deep) 0%, var(--brand-blue) 58%, #8ec4ff 100%);
  background-clip: text;
  -webkit-background-clip: text;
}

.hero-copy h2 span:first-child {
  color: var(--brand-blue-deep);
}

.hero-copy p {
  max-width: 360px;
  font-size: var(--text-h4);
  line-height: 1.3;
}

.intro-section {
  position: relative;
  min-height: 330vh;
  padding: 10vh var(--page-inline) 104vh;
  background:
    linear-gradient(180deg, #fff 0%, #fff 74%, rgba(247, 248, 250, 0.82) 100%);
}

.intro-section::after {
  content: "";
  position: absolute;
  right: 0;
  bottom: -1px;
  left: 0;
  height: clamp(160px, 26vh, 320px);
  pointer-events: none;
  background: linear-gradient(180deg, rgba(255, 255, 255, 0), #f7f8fa 84%);
}

.intro-inner {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  justify-content: center;
  max-width: 1280px;
  margin: 0 auto;
}

.reading-sticky {
  position: sticky;
  top: 20vh;
  min-height: 58vh;
  opacity: calc(1 - var(--reading-exit-progress, 0));
  transform: translate3d(0, calc(var(--reading-exit-progress, 0) * -70px), 0);
  transition: opacity 0.16s linear, transform 0.16s linear;
  will-change: opacity, transform;
}

.reading-sticky.is-fixed {
  position: fixed;
  top: 20vh;
  left: var(--reading-left);
  z-index: 2;
  width: var(--reading-width);
  pointer-events: none;
}

.reading-text {
  max-width: 1180px;
  color: #d5d5d5;
  font-size: clamp(34px, 4vw, 72px);
  font-weight: 300;
  line-height: 1.26;
  text-align: left;
}

:lang(zh-CN) .reading-text {
  max-width: 1260px;
  font-size: clamp(32px, 3.45vw, 60px);
  line-height: 1.34;
}

.reading-text .reading-token {
  color: #d5d5d5;
  transition: color 0.18s linear;
}

.reading-text .reading-token.is-read {
  color: #484848;
}

.reading-text .reading-token.is-read.is-blue-target {
  color: var(--brand-blue);
}

.reading-break {
  display: block;
  height: 0.52em;
}

.product-section {
  display: flex;
  flex-direction: column;
  gap: 16px;
  width: 100%;
  min-height: 96vh;
  margin-top: -10vh;
  padding: calc(100px + 10vh) var(--page-inline) var(--section-v);
  background: var(--color-soft);
}

.product-frame {
  position: relative;
  flex: 1;
  min-height: 620px;
  overflow: hidden;
  border-radius: 30px;
  background: #fff;
}

.product-media {
  position: absolute;
  inset: 0;
  background:
    radial-gradient(circle at 50% 46%, rgba(255, 255, 255, 0.95), rgba(242, 243, 246, 0.5) 36%, transparent 58%),
    linear-gradient(135deg, #f8f8fa, #eceef2);
}

.product-media img,
.brochure-visual img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
}

.product-media img {
  opacity: 0.9;
  filter: saturate(0.9) contrast(0.95);
}

.product-orbit {
  position: absolute;
  top: 50%;
  left: 50%;
  width: min(54vw, 620px);
  aspect-ratio: 1;
  transform: translate(-50%, -50%);
}

.product-orbit span {
  position: absolute;
  inset: 12%;
  border: 1px solid rgba(69, 69, 69, 0.12);
  border-radius: 50%;
}

.product-orbit span:nth-child(2) {
  inset: 24%;
}

.product-orbit span:nth-child(3) {
  inset: 36%;
}

.product-label {
  position: absolute;
  top: 50%;
  z-index: 2;
  color: #fff;
  background: rgba(255, 255, 255, 0.25);
  border: 1px solid rgba(255, 255, 255, 0.45);
  border-radius: 100px;
  padding: 8px 24px;
  font-size: var(--text-h4);
  font-weight: 400;
  backdrop-filter: blur(18px);
}

.label-left {
  left: 8%;
}

.label-right {
  right: 8%;
}

.unit-toggle {
  display: none;
  align-self: center;
  gap: 4px;
  padding: 4px;
  border-radius: 100px;
  background: rgba(232, 232, 237, 0.72);
}

.unit-toggle button {
  appearance: none;
  border: 0;
  border-radius: 100px;
  color: #1d1d1f;
  background: transparent;
  cursor: pointer;
  padding: 10px 20px;
  font-size: 15px;
  font-weight: 500;
}

.unit-toggle .is-active {
  color: #fff;
  background: #1d1d1f;
}

.feature-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  padding: 0 var(--page-inline) var(--section-v);
  background: linear-gradient(var(--color-soft), #fff);
}

.feature-grid article {
  display: flex;
  flex-direction: column;
  gap: 1.4vw;
  min-width: 0;
  padding-bottom: 20px;
}

.feature-grid article:nth-child(2) {
  border-inline: 1px solid var(--color-line);
  padding-inline: 2vw;
}

.feature-grid article:first-child {
  padding-right: 2vw;
}

.feature-grid article:last-child {
  padding-left: 2vw;
}

.feature-grid h2 {
  color: #bebebe;
}

.feature-grid p {
  line-height: 1.6;
}

.water-section {
  min-height: 100vh;
  padding: calc(var(--section-v) * 0.8) var(--page-inline) var(--section-v);
  background: linear-gradient(#fff, var(--color-soft));
}

.water-panel {
  display: grid;
  grid-template-columns: 0.9fr 1.1fr;
  align-items: center;
  gap: clamp(24px, 3vw, 48px);
  min-height: 70vh;
}

.water-visual {
  position: relative;
  min-height: 520px;
}

.brochure-visual {
  overflow: hidden;
  border-radius: 30px;
  background: #fff;
  box-shadow: inset 0 0 0 1px rgba(0, 0, 0, 0.04);
}

.water-visual span {
  position: absolute;
  left: 8%;
  width: 50%;
  aspect-ratio: 1;
  border-radius: 50%;
  background: linear-gradient(145deg, rgba(220, 224, 232, 0.8), rgba(255, 255, 255, 0.2));
  filter: blur(0.2px);
}

.water-visual span:nth-child(1) {
  top: 6%;
  transform: scale(0.8);
}

.water-visual span:nth-child(2) {
  top: 28%;
  left: 20%;
  transform: scale(1.02);
}

.water-visual span:nth-child(3) {
  top: 52%;
  left: 6%;
  transform: scale(0.72);
}

.water-copy {
  display: flex;
  flex-direction: column;
  gap: 24px;
  max-width: 520px;
  text-align: left;
}

.closer-section {
  display: flex;
  flex-direction: column;
  justify-content: center;
  min-height: 100vh;
  padding: 90px 0 56px;
  background: linear-gradient(#fff, var(--color-soft));
}

.closer-section header {
  padding: 0 var(--page-inline) clamp(20px, 3vh, 40px);
  text-align: center;
}

.closer-section header h2 {
  color: #1d1d1f;
  font-size: clamp(32px, 4vw, 56px);
  font-weight: 400;
  line-height: 1.06;
}

.closer-viewer {
  display: flex;
  min-height: clamp(480px, 70vh, 840px);
  overflow: hidden;
  background: var(--color-soft);
}

.closer-media {
  position: relative;
  flex: 1;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: clamp(20px, 4vw, 70px);
}

.ceramic-card {
  position: relative;
  display: flex;
  flex-direction: column;
  justify-content: flex-end;
  width: min(72%, 520px);
  aspect-ratio: 1;
  padding: 32px;
  overflow: hidden;
  border-radius: 28px;
  background: #1f3a5c;
}

.ceramic-disc {
  position: absolute;
  top: 16%;
  left: 50%;
  width: 58%;
  aspect-ratio: 1;
  border-radius: 50%;
  background:
    radial-gradient(circle at 45% 28%, #fff 0 5%, transparent 6%),
    radial-gradient(circle at 45% 40%, #f7f6f2, #d3d1ca 58%, #a8a9a7 100%);
  box-shadow: inset 0 0 20px rgba(255, 255, 255, 0.8), 0 50px 70px rgba(0, 0, 0, 0.28);
  transform: translateX(-50%);
}

.ceramic-card p {
  position: relative;
  z-index: 1;
  color: rgba(255, 255, 255, 0.86);
}

.closer-list {
  display: flex;
  flex-direction: column;
  justify-content: center;
  width: min(38vw, 520px);
  padding: 24px 90px 24px 24px;
  list-style: none;
}

.closer-list li {
  border-bottom: 1px solid rgba(69, 69, 69, 0.16);
}

.closer-list button {
  display: flex;
  align-items: center;
  gap: 12px;
  width: 100%;
  min-height: 58px;
  appearance: none;
  border: 0;
  color: #1d1d1f;
  background: transparent;
  cursor: pointer;
  text-align: left;
  font-size: 15px;
}

.plus-icon {
  position: relative;
  flex: none;
  width: 24px;
  height: 24px;
  border: 1px solid currentColor;
  border-radius: 50%;
}

.plus-icon::before,
.plus-icon::after {
  content: "";
  position: absolute;
  top: 50%;
  left: 50%;
  width: 9px;
  height: 1px;
  background: currentColor;
  transform: translate(-50%, -50%);
}

.plus-icon::after {
  transform: translate(-50%, -50%) rotate(90deg);
}

.closer-list p {
  display: none;
  padding: 0 0 22px 36px;
  line-height: 1.55;
}

.closer-list .is-open + p {
  display: block;
}

.specs-section {
  display: flex;
  flex-direction: column;
  align-items: stretch;
  gap: clamp(34px, 5vw, 72px);
  padding: 120px var(--page-inline) 76px;
  background: #fff;
}

.specs-left {
  width: min(100%, 1280px);
  margin: 0 auto;
  padding-right: 0;
}

.specs-table {
  display: flex;
  flex-direction: column;
  width: min(100%, 1280px);
  margin: 0 auto;
}

.spec-row {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  column-gap: clamp(16px, 3vw, 40px);
  border-top: 1px solid var(--color-line);
  padding-block: clamp(12px, 1.5vw, 22px);
}

.spec-row:last-child {
  border-bottom: 1px solid var(--color-line);
}

.spec-row h3 {
  line-height: 1;
}

.spec-row p {
  font-size: 15px;
  line-height: 1.4;
}

.split-section {
  position: relative;
  padding: var(--section-v) var(--page-inline);
  background: var(--color-soft);
}

.split-inner {
  display: flex;
  min-height: 70vh;
  overflow: hidden;
  border-radius: 30px;
  background: #fff;
  box-shadow: inset 0 0 0 1px rgba(0, 0, 0, 0.04);
}

.split-inner > div:first-child {
  display: flex;
  flex: 1;
  flex-direction: column;
  justify-content: space-between;
  padding: clamp(24px, 4vw, 60px);
}

.split-inner p {
  max-width: 430px;
  padding-left: 20px;
  border-left: 1px solid var(--color-line);
}

.split-media {
  flex: 1;
  margin: 12px;
  border-radius: 18px;
  background:
    radial-gradient(circle at 52% 30%, #fff 0 5%, transparent 6%),
    radial-gradient(circle at 52% 44%, #f7f6f2, #d2d1cb 50%, #9fa2a4 100%);
}

.brochure-thermal {
  background: url("./assets/images/brochure-thermal.jpg") center / cover no-repeat;
}

.section-heading {
  display: flex;
  flex-direction: column;
  gap: 18px;
  max-width: 860px;
}

.section-heading > p,
.company-copy > p {
  color: #9a9a9a;
  font-size: clamp(15px, 1.1vw, 20px);
  letter-spacing: 0;
  text-transform: uppercase;
}

.section-heading h2,
.company-copy h2 {
  color: #424242;
  font-size: clamp(38px, 5.8vw, 92px);
  font-weight: 300;
  line-height: 1.02;
}

.company-copy h2 {
  font-size: clamp(34px, 4vw, 64px);
  line-height: 1.08;
}

.product-section {
  gap: clamp(42px, 6vw, 90px);
  min-height: auto;
  margin-top: -10vh;
  padding: calc(130px + 10vh) var(--page-inline) 130px;
  background: linear-gradient(180deg, #f7f8fa 0%, #fff 18%, #f5f6f8 72%, #fff 100%);
}

.product-gallery {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: clamp(16px, 1.6vw, 26px);
  width: min(100%, 1280px);
  margin: 0 auto;
}

.product-card {
  position: relative;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  min-height: 560px;
  overflow: hidden;
  border: 1px solid rgba(39, 49, 58, 0.08);
  border-radius: 28px;
  background:
    radial-gradient(circle at 50% 30%, rgba(255, 255, 255, 0.94), rgba(244, 246, 249, 0.46) 48%, rgba(232, 235, 240, 0.9)),
    #f5f6f8;
  padding: clamp(22px, 2vw, 34px);
  box-shadow: 0 30px 90px -64px rgba(39, 49, 58, 0.52);
  min-width: 0;
}

.product-card-large {
  grid-column: span 1;
}

.product-card img {
  width: 100%;
  height: min(42vh, 340px);
  object-fit: cover;
  object-position: center center;
  border-radius: 22px;
  filter: saturate(0.96);
  box-shadow: 0 24px 46px -34px rgba(20, 25, 30, 0.75);
}

.product-card img.product-image-zenith {
  object-position: 53% 58%;
}

.product-card img.product-image-precision {
  object-position: 50% 62%;
}

.product-card h3 {
  display: flex;
  align-items: baseline;
  gap: 12px;
  margin: 26px 0 8px;
  color: #414141;
  font-size: clamp(30px, 3.2vw, 54px);
  letter-spacing: 0;
  line-height: 0.94;
}

.product-card h3 span {
  color: rgba(65, 65, 65, 0.54);
  font-size: clamp(13px, 1vw, 16px);
  font-weight: 500;
  letter-spacing: 0;
  line-height: 1.2;
  white-space: nowrap;
}

.product-card p {
  max-width: 460px;
  color: rgba(65, 65, 65, 0.64);
}

.thermal-section {
  padding: 112px var(--page-inline);
  background: #fff;
}

.thermal-layout {
  display: grid;
  grid-template-columns: minmax(320px, 0.95fr) minmax(420px, 0.88fr);
  gap: clamp(26px, 4vw, 58px);
  align-items: stretch;
  width: min(100%, 1280px);
  margin: 0 auto;
}

.thermal-copy {
  display: flex;
  flex-direction: column;
  justify-content: flex-start;
  gap: clamp(14px, 1.35vw, 20px);
  max-width: 690px;
}

:lang(en) .thermal-copy {
  justify-content: space-between;
}

:lang(zh-CN) .thermal-copy p:first-of-type {
  margin-top: auto;
}

.thermal-heading {
  gap: 14px;
  max-width: 680px;
  margin-bottom: clamp(8px, 1vw, 16px);
}

.thermal-heading h2 {
  font-size: clamp(34px, 4.7vw, 74px);
}

.thermal-copy p {
  font-size: clamp(15px, 1.12vw, 18px);
  line-height: 1.72;
}

.thermal-figures {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(12px, 1.2vw, 18px);
  justify-self: end;
  width: min(100%, 610px);
}

.thermal-figure {
  overflow: hidden;
  border: 1px solid rgba(39, 49, 58, 0.08);
  border-radius: 22px;
  background: #fff;
  box-shadow: 0 28px 80px -60px rgba(39, 49, 58, 0.42);
}

.thermal-figure img {
  display: block;
  width: 100%;
  height: auto;
  max-height: 272px;
  object-fit: contain;
}

.thermal-figure:nth-child(2) img {
  max-height: 318px;
}

.thermal-photo {
  min-height: min(62vw, 640px);
  border-radius: 30px;
  background:
    linear-gradient(90deg, rgba(255, 255, 255, 0.16), rgba(255, 255, 255, 0.76)),
    url("./assets/images/brochure-thermal.jpg") left center / cover no-repeat;
  box-shadow: inset 0 0 0 1px rgba(39, 49, 58, 0.08);
}

.principle-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: clamp(18px, 2vw, 28px);
  width: min(100%, 1080px);
  margin-top: 28px;
  margin-inline: auto;
}

.principle-card {
  display: flex;
  flex-direction: column;
  gap: 22px;
  min-height: 420px;
  border: 1px solid rgba(39, 49, 58, 0.08);
  border-radius: 28px;
  background: #f6f7f9;
  padding: clamp(22px, 3vw, 42px);
}

.principle-card h3 {
  color: #343434;
  font-size: clamp(22px, 2.4vw, 38px);
}

.spray-diagram {
  position: relative;
  min-height: 230px;
  overflow: hidden;
  border-radius: 22px;
  background: linear-gradient(135deg, #edf1f5, #ffffff);
}

.spray-nozzle {
  position: absolute;
  top: 42%;
  left: 8%;
  width: 30%;
  height: 34px;
  border-radius: 18px 6px 6px 18px;
  background: linear-gradient(90deg, #b9c2cb, #eef2f6 58%, #8996a2);
  transform: translateY(-50%);
}

.spray-nozzle::before,
.spray-nozzle::after {
  content: "";
  position: absolute;
  right: 18%;
  width: 64%;
  height: 1px;
  background: rgba(39, 49, 58, 0.34);
}

.spray-nozzle::before {
  top: -28px;
}

.spray-nozzle::after {
  bottom: -28px;
}

.spray-flame {
  position: absolute;
  top: 42%;
  left: 34%;
  width: 42%;
  height: 86px;
  border-radius: 0 100% 100% 0;
  background:
    radial-gradient(ellipse at 18% 50%, #ffffff 0 14%, transparent 15%),
    linear-gradient(90deg, #1f78a9, #28a8d8 30%, #f0c54a 62%, rgba(240, 116, 71, 0.16));
  clip-path: polygon(0 16%, 100% 50%, 0 84%);
  filter: drop-shadow(0 8px 18px rgba(40, 168, 216, 0.22));
  transform: translateY(-50%);
}

.spray-substrate {
  position: absolute;
  top: 18%;
  right: 10%;
  width: 42px;
  height: 64%;
  border-radius: 9px;
  background: linear-gradient(90deg, #dfe3e8, #ffffff 40%, #aeb8c2);
  box-shadow: inset 8px 0 0 rgba(31, 120, 169, 0.2);
}

.spray-diagram span,
.coating-diagram span {
  position: absolute;
  z-index: 2;
  color: #6d747a;
  font-size: 11px;
}

.gas-label {
  top: 38px;
  left: 13%;
}

.powder-label {
  bottom: 34px;
  left: 32%;
}

.substrate-label {
  right: 8%;
  bottom: 28px;
}

.coating-diagram {
  position: relative;
  display: flex;
  flex-direction: column;
  justify-content: center;
  min-height: 230px;
  overflow: hidden;
  border-radius: 22px;
  background: linear-gradient(135deg, #ffffff, #eef2f6);
  padding: 40px;
}

.coating-diagram i {
  display: block;
  height: 42px;
  border-radius: 12px;
}

.coating-diagram i:nth-of-type(1) {
  background: linear-gradient(90deg, #1f78a9, #42b8df);
}

.coating-diagram i:nth-of-type(2) {
  height: 26px;
  margin-top: 8px;
  background: linear-gradient(90deg, #f0c54a, #f4df91);
}

.coating-diagram i:nth-of-type(3) {
  height: 78px;
  margin-top: 8px;
  background: linear-gradient(90deg, #c8d0d8, #f9fbfc);
}

.coating-diagram span:nth-child(1) {
  top: 52px;
  left: 56px;
}

.coating-diagram span:nth-child(2) {
  top: 104px;
  left: 56px;
}

.coating-diagram span:nth-child(3) {
  bottom: 64px;
  left: 56px;
}

.company-section {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
  gap: clamp(32px, 5vw, 76px);
  align-items: start;
  padding: 130px var(--page-inline);
  background: linear-gradient(#fff, #f5f6f8);
}

.company-visual {
  overflow: hidden;
  border-radius: 30px;
  background: #fff;
  box-shadow: inset 0 0 0 1px rgba(39, 49, 58, 0.06);
}

.company-visual img {
  display: block;
  width: 100%;
  height: 100%;
  min-height: 420px;
  object-fit: cover;
  object-position: 76% center;
}

:lang(en) .company-visual img {
  min-height: 620px;
}

.company-copy {
  display: flex;
  flex-direction: column;
  justify-content: flex-start;
  gap: 22px;
  max-width: 660px;
  padding-top: 2px;
}

.company-copy h4 {
  color: rgba(65, 65, 65, 0.74);
  font-size: clamp(16px, 1.22vw, 20px);
  font-weight: 300;
  line-height: 1.72;
}

.cta-section {
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: auto;
  padding: 74px var(--page-inline) 110px;
  background: #fff;
  text-align: center;
}

.cta-section > div {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 22px;
  width: min(100%, 900px);
}

.contact-card {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 18px;
  width: min(100%, 820px);
  border: 1px solid var(--color-line);
  border-radius: 28px;
  background: #fff;
  padding: clamp(34px, 4.8vw, 64px);
  box-shadow: 0 24px 70px -44px rgba(39, 49, 58, 0.38);
  text-align: left;
}

.contact-card p:first-child {
  color: var(--color-text);
  font-size: clamp(18px, 1.7vw, 28px);
  font-weight: 400;
}

.contact-card p {
  width: 100%;
  line-height: 1.65;
}

.contact-card strong {
  color: var(--color-text);
  font-weight: 500;
}

footer {
  padding: 80px var(--page-inline) 28px;
  color: rgba(255, 255, 255, 0.72);
  background: #1d1d1f;
}

.footer-inner {
  display: grid;
  grid-template-columns: 1fr repeat(3, minmax(120px, 180px));
  gap: 24px;
}

.footer-brand {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  width: fit-content;
  align-self: start;
}

.footer-logo-icon {
  display: block;
  flex: none;
  width: 50px;
  height: 76px;
  overflow: hidden;
  border-radius: 14px;
}

.footer-logo-icon img {
  display: block;
  width: auto;
  height: 100%;
  max-width: none;
  transform: translateX(-2px);
  transform-origin: left center;
}

.footer-logo-type {
  display: flex;
  flex-direction: column;
  gap: 4px;
  color: rgba(255, 255, 255, 0.88);
  line-height: 1;
}

.footer-logo-type span {
  font-size: 31px;
  font-weight: 600;
  letter-spacing: 0.1em;
}

.footer-logo-type small {
  color: rgba(255, 255, 255, 0.5);
  font-size: 10px;
  font-weight: 600;
  letter-spacing: 0.08em;
}

footer p {
  margin-bottom: 12px;
  color: rgba(255, 255, 255, 0.42);
  font-size: var(--text-small);
}

footer a {
  display: block;
  margin-bottom: 8px;
  font-size: var(--text-body);
}

.visually-hidden {
  position: absolute;
  width: 1px;
  height: 1px;
  overflow: hidden;
  clip: rect(0 0 0 0);
  white-space: nowrap;
}

[data-fade],
.product-card,
.thermal-layout,
.principle-card,
.company-section,
.spec-row,
.split-inner {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity 0.7s var(--ease), transform 0.7s var(--ease);
}

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

@media (max-width: 900px) {
  :root {
    --section-v: 80px;
  }

  .site-nav {
    padding-inline: 18px;
  }

  .brand-icon {
    width: 36px;
    height: 54px;
  }

  .brand-icon img {
    height: 54px;
  }

  .brand-type span {
    font-size: 23px;
  }

  .brand-type small {
    font-size: 8px;
  }

  .nav-center {
    gap: 16px;
    padding: 8px 14px;
  }

  .hero {
    height: 250vh;
  }

  .intro-section {
    min-height: 275vh;
    padding-inline: 24px;
  }

  .reading-sticky {
    top: 18vh;
    min-height: 50vh;
  }

  .reading-text {
    font-size: clamp(30px, 7vw, 48px);
    line-height: 1.32;
  }

  :lang(zh-CN) .reading-text {
    font-size: clamp(28px, 6vw, 42px);
  }

  .model-wrap {
    inset: 8vh 0 6vh;
  }

  .product-section {
    min-height: auto;
    margin-top: -9vh;
    padding-top: calc(70px + 9vh);
  }

  .product-gallery,
  .principle-grid,
  .thermal-layout,
  .company-section {
    grid-template-columns: 1fr;
  }

  .product-card-large {
    grid-column: span 1;
  }

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

  .thermal-section,
  .company-section {
    padding-block: 90px;
  }

  .thermal-figures {
    gap: 16px;
    justify-self: stretch;
    width: 100%;
  }

  .company-visual img {
    min-height: 420px;
  }

  .product-frame {
    min-height: 360px;
    aspect-ratio: 1;
  }

  .product-label {
    display: none;
  }

  .unit-toggle {
    display: inline-flex;
  }

  .feature-grid,
  .water-panel,
  .specs-section,
  .split-inner,
  .closer-viewer {
    display: flex;
    flex-direction: column;
  }

  .feature-grid article,
  .feature-grid article:first-child,
  .feature-grid article:last-child,
  .feature-grid article:nth-child(2) {
    gap: 16px;
    border-inline: 0;
    border-top: 1px solid var(--color-line);
    padding: 26px 0;
  }

  .water-visual {
    min-height: 320px;
  }

  .water-copy {
    max-width: none;
    margin: 0 auto;
    text-align: center;
  }

  .closer-list,
  .specs-left,
  .specs-table {
    width: 100%;
  }

  .closer-list {
    padding: 0 24px 32px;
  }

  .closer-media {
    min-height: 380px;
  }

  .specs-section {
    gap: 36px;
    padding-block: 86px 54px;
  }

  .spec-row {
    grid-template-columns: 1fr;
    gap: 8px;
  }

  .split-inner > div:first-child {
    gap: 80px;
  }

  .split-media {
    min-height: 360px;
  }

  .footer-inner {
    grid-template-columns: 1fr 1fr;
  }
}

@media (max-width: 560px) {
  .brand-mark,
  .nav-actions {
    flex: 0;
  }

  .brand-icon {
    width: 31px;
    height: 46px;
  }

  .brand-icon img {
    height: 46px;
  }

  .brand-type {
    gap: 3px;
  }

  .brand-type span {
    font-size: 19px;
  }

  .brand-type small {
    font-size: 7px;
  }

  .nav-center a {
    font-size: 11px;
  }

  .lang-btn {
    padding: 7px 10px;
    font-size: 10px;
  }

  .hero-copy {
    padding-bottom: 70px;
  }

  .hero-copy h2 {
    flex-direction: column;
    gap: 0;
  }

  .intro-section {
    min-height: 255vh;
    padding-inline: 20px;
  }

  .reading-sticky {
    top: 22vh;
  }

  .reading-text {
    font-size: 30px;
  }

  :lang(zh-CN) .reading-text {
    font-size: 28px;
  }

  .product-section,
  .thermal-section,
  .company-section {
    padding-inline: 20px;
  }

  .section-heading h2,
  .company-copy h2 {
    font-size: 36px;
  }

  .section-heading > p,
  .company-copy > p {
    font-size: 14px;
  }

  .product-card {
    min-height: 380px;
    border-radius: 22px;
  }

  .product-card img {
    height: 280px;
  }

  .principle-card {
    min-height: 360px;
    border-radius: 22px;
  }

}

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    scroll-behavior: auto !important;
    transition-duration: 0.001ms !important;
    animation-duration: 0.001ms !important;
  }
}