:root {
  --bg: #180808;
  --bg-soft: #220d0d;
  --bg-panel: #2a1111;
  --bg-panel-strong: #341616;
  --line: rgba(217, 75, 61, 0.18);
  --line-strong: #5b2727;
  --text: #fff8f4;
  --text-soft: #e7d3cf;
  --muted: #ad8e8c;
  --gold: #d94b3d;
  --gold-strong: #f07163;
  --jade: #8d5c55;
  --clay: #d97b6a;
  --white: #fff9f5;
  --font-body: "PingFang SC", "Microsoft YaHei", "Segoe UI", sans-serif;
  --font-display: "Noto Serif SC", "Songti SC", "STSong", "Georgia", serif;
  --container: 1180px;
  --header-height: 76px;
  --radius: 8px;
  --shadow: 0 20px 60px rgba(0, 0, 0, 0.24);
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
  scroll-padding-top: calc(var(--header-height) + 18px);
}

body {
  margin: 0;
  min-width: 320px;
  background: var(--bg);
  color: var(--text);
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.75;
  text-rendering: optimizeLegibility;
}

body.menu-locked {
  overflow: hidden;
}

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

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

button,
input,
textarea {
  color: inherit;
  font: inherit;
}

button {
  cursor: pointer;
}

svg {
  display: block;
  flex: 0 0 auto;
}

.button svg,
.header-cta svg,
.mobile-cta svg,
.desktop-nav svg,
.contact-info-icon svg,
.vision-icon svg,
.dialog-icon svg {
  fill: none;
  stroke: currentColor;
  stroke-linecap: round;
  stroke-linejoin: round;
  stroke-width: 1.8;
}

.container {
  width: min(var(--container), calc(100% - 48px));
  margin: 0 auto;
}

.skip-link {
  position: fixed;
  top: 10px;
  left: 10px;
  z-index: 1000;
  padding: 10px 14px;
  border-radius: var(--radius);
  background: var(--gold);
  color: var(--bg);
  font-weight: 600;
  transform: translateY(-160%);
  transition: transform 180ms ease;
}

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

.site-header {
  position: fixed;
  inset: 0 0 auto;
  z-index: 100;
  height: var(--header-height);
  border-bottom: 1px solid rgba(217, 75, 61, 0.14);
  background: rgba(12, 17, 16, 0.9);
  backdrop-filter: blur(16px);
  transition: box-shadow 180ms ease, background 180ms ease;
}

.site-header.is-scrolled {
  background: rgba(12, 17, 16, 0.97);
  box-shadow: 0 12px 34px rgba(0, 0, 0, 0.2);
}

.header-inner {
  display: flex;
  height: var(--header-height);
  align-items: center;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  min-width: max-content;
}

.brand-mark {
  width: 42px;
  height: 42px;
  border-radius: var(--radius);
  box-shadow: 0 8px 26px rgba(0, 0, 0, 0.2);
  background-image: url("assets/company-logo.jpg");
  background-position: center;
  background-size: cover;
  border-radius: 50%;
  overflow: hidden;
}

.brand-mark rect,
.brand-mark path,
.brand-mark circle {
  display: none;
}

.brand-copy {
  display: grid;
  line-height: 1.15;
}

.brand-copy strong {
  font-family: var(--font-display);
  font-size: 18px;
  font-weight: 600;
}

.brand-copy small {
  margin-top: 4px;
  color: var(--muted);
  font-size: 9px;
  line-height: 1;
}

.desktop-nav {
  display: flex;
  height: 100%;
  align-items: stretch;
  gap: 36px;
  margin-left: 54px;
}

.desktop-nav a {
  position: relative;
  display: flex;
  align-items: center;
  color: var(--text-soft);
  font-size: 15px;
  transition: color 180ms ease;
}

.desktop-nav a::after {
  position: absolute;
  right: 0;
  bottom: 0;
  left: 0;
  height: 2px;
  background: var(--gold);
  content: "";
  opacity: 0;
  transform: scaleX(0.4);
  transition: opacity 180ms ease, transform 180ms ease;
}

.desktop-nav a:hover,
.desktop-nav a.is-active {
  color: var(--gold-strong);
}

.desktop-nav a:hover::after,
.desktop-nav a.is-active::after {
  opacity: 1;
  transform: scaleX(1);
}

.header-cta {
  margin-left: auto;
}

.language-switcher {
  position: relative;
  margin-left: 12px;
}

.lang-toggle {
  display: inline-flex;
  height: 40px;
  align-items: center;
  gap: 6px;
  padding: 0 10px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: transparent;
  color: var(--text-soft);
  font-size: 12px;
  font-weight: 600;
  line-height: 1;
}

.lang-toggle:hover {
  border-color: var(--gold);
  color: var(--gold-strong);
}

.lang-toggle svg {
  width: 14px;
  height: 14px;
  fill: none;
  stroke: currentColor;
  stroke-linecap: round;
  stroke-linejoin: round;
  stroke-width: 1.8;
}

.language-menu {
  position: absolute;
  top: calc(100% + 8px);
  right: 0;
  z-index: 130;
  display: grid;
  min-width: 150px;
  padding: 6px;
  border: 1px solid var(--line-strong);
  border-radius: var(--radius);
  background: #2a1111;
  box-shadow: 0 18px 50px rgba(0, 0, 0, 0.36);
  opacity: 0;
  pointer-events: none;
  transform: translateY(-6px);
  transition: opacity 160ms ease, transform 160ms ease;
}

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

.language-option {
  width: 100%;
  padding: 9px 10px;
  border: 0;
  border-radius: 6px;
  background: transparent;
  color: var(--text-soft);
  font-size: 13px;
  text-align: left;
}

.language-option:hover,
.language-option.is-active {
  background: rgba(217, 75, 61, 0.1);
  color: var(--gold-strong);
}

.button {
  display: inline-flex;
  min-height: 48px;
  align-items: center;
  justify-content: center;
  gap: 10px;
  padding: 0 22px;
  border: 1px solid transparent;
  border-radius: var(--radius);
  font-size: 15px;
  font-weight: 600;
  line-height: 1;
  white-space: nowrap;
  transition: transform 180ms ease, border-color 180ms ease, background 180ms ease, color 180ms ease;
}

.button svg {
  width: 18px;
  height: 18px;
}

.button:hover {
  transform: translateY(-2px);
}

.button-gold {
  background: var(--gold);
  color: var(--bg);
}

.button-gold:hover {
  background: var(--gold-strong);
}

.button-outline {
  border-color: rgba(217, 75, 61, 0.48);
  background: transparent;
  color: var(--gold-strong);
}

.button-outline:hover {
  border-color: var(--gold);
  background: rgba(217, 75, 61, 0.08);
}

.menu-toggle {
  display: none;
  width: 44px;
  height: 44px;
  margin-left: auto;
  padding: 10px;
  border: 0;
  background: transparent;
}

.menu-toggle span {
  display: block;
  width: 24px;
  height: 1.5px;
  margin: 6px auto;
  background: var(--text);
  transition: transform 180ms ease, opacity 180ms ease;
}

.menu-toggle[aria-expanded="true"] span:nth-child(1) {
  transform: translateY(7.5px) rotate(45deg);
}

.menu-toggle[aria-expanded="true"] span:nth-child(2) {
  opacity: 0;
}

.menu-toggle[aria-expanded="true"] span:nth-child(3) {
  transform: translateY(-7.5px) rotate(-45deg);
}

.mobile-nav {
  position: fixed;
  top: var(--header-height);
  right: 0;
  left: 0;
  display: grid;
  padding: 18px 24px 28px;
  border-bottom: 1px solid var(--line);
  background: rgba(12, 17, 16, 0.98);
  opacity: 0;
  pointer-events: none;
  transform: translateY(-12px);
  transition: opacity 180ms ease, transform 180ms ease;
}

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

.mobile-nav a:not(.button) {
  padding: 13px 2px;
  border-bottom: 1px solid rgba(217, 75, 61, 0.1);
  color: var(--text-soft);
}

.mobile-nav a:not(.button).is-active {
  color: var(--gold-strong);
}

.mobile-cta {
  width: 100%;
  margin-top: 18px;
}

.hero,
.page-hero {
  position: relative;
  overflow: hidden;
}

.hero-media {
  position: absolute;
  inset: 0;
}

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

.hero-shade {
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, rgba(12, 17, 16, 0.52) 0%, rgba(12, 17, 16, 0.26) 46%, rgba(12, 17, 16, 0.92) 100%);
}

.home-hero {
  display: flex;
  min-height: min(880px, 100svh);
  align-items: center;
  padding: 150px 0 110px;
}

.hero-content {
  position: relative;
  z-index: 2;
  width: 100%;
  max-width: 980px;
  margin: 0 auto;
  text-align: center;
}

.hero-eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  margin: 0 0 26px;
  color: var(--gold);
  font-size: 12px;
  font-weight: 500;
}

.hero-eyebrow::before,
.hero-eyebrow::after {
  width: 28px;
  height: 1px;
  background: var(--gold);
  content: "";
  opacity: 0.7;
}

.hero h1,
.page-hero h1 {
  margin: 0;
  font-family: var(--font-display);
  font-size: 64px;
  font-weight: 500;
  line-height: 1.2;
}

.home-hero h1 {
  font-size: 80px;
  line-height: 1.08;
}

.home-hero h1 span {
  display: block;
  margin-top: 16px;
  color: var(--gold-strong);
}

.hero-subtitle {
  margin: 30px 0 0;
  color: var(--muted);
  font-size: 16px;
  font-weight: 400;
}

.hero-intro-lines {
  display: grid;
  max-width: 620px;
  gap: 4px;
  margin: 18px auto 0;
  color: var(--text-soft);
  font-size: 15px;
}

.hero-intro-lines span + span {
  color: var(--muted);
}

.hero-button {
  min-width: 180px;
  margin-top: 40px;
}

.scroll-cue {
  position: absolute;
  bottom: 24px;
  left: 50%;
  z-index: 3;
  display: grid;
  width: 30px;
  height: 48px;
  place-items: start center;
  border: 1px solid rgba(217, 75, 61, 0.55);
  border-radius: 18px;
  transform: translateX(-50%);
}

.scroll-cue span {
  width: 2px;
  height: 10px;
  margin-top: 9px;
  border-radius: 2px;
  background: var(--gold);
  animation: scroll-drop 1.8s ease-in-out infinite;
}

@keyframes scroll-drop {
  0%,
  100% {
    opacity: 0.3;
    transform: translateY(-3px);
  }

  45% {
    opacity: 1;
    transform: translateY(12px);
  }
}

.home-section,
.product-section,
.about-intro-section,
.about-values-section,
.contact-main-section,
.contact-details-section {
  padding: 140px 0;
}

.philosophy-section,
.vision-section,
.demo-section,
.contact-details-section {
  border-top: 1px solid rgba(217, 75, 61, 0.1);
  border-bottom: 1px solid rgba(217, 75, 61, 0.1);
  background: var(--bg-soft);
}

.philosophy-grid {
  display: grid;
  grid-template-columns: 220px minmax(0, 1fr);
  gap: 116px;
  align-items: center;
}

.philosophy-mark,
.contact-hero-mark {
  display: grid;
  justify-items: center;
}

.philosophy-mark span,
.contact-hero-mark span {
  display: grid;
  width: 104px;
  height: 104px;
  place-items: center;
  border: 1px solid rgba(217, 75, 61, 0.46);
  background: rgba(20, 29, 27, 0.82);
  color: var(--gold-strong);
  font-family: var(--font-display);
  font-size: 48px;
  line-height: 1;
}

.philosophy-mark i,
.contact-hero-mark i {
  width: 1px;
  height: 48px;
  margin: 10px 0;
  background: linear-gradient(var(--gold), var(--jade));
}

.eyebrow {
  margin: 0 0 16px;
  color: var(--gold);
  font-size: 13px;
  font-weight: 600;
}

h2 {
  margin: 0;
  font-family: var(--font-display);
  font-size: 42px;
  font-weight: 500;
  line-height: 1.3;
}

.lead {
  color: var(--text-soft);
  font-size: 20px;
  line-height: 1.75;
}

.philosophy-copy h2 {
  font-size: 54px;
  line-height: 1.22;
}

.philosophy-copy .lead {
  max-width: 640px;
  margin-top: 30px;
  font-size: 22px;
  line-height: 1.75;
}

.philosophy-copy > p:last-child,
.about-intro-copy > p:last-child {
  color: var(--muted);
}

.product-preview-grid {
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  gap: 108px;
  align-items: center;
}

.product-preview-media {
  position: relative;
  aspect-ratio: 4 / 3;
  border: 1px solid var(--line-strong);
  border-radius: var(--radius);
  background: var(--bg-panel);
  overflow: hidden;
  box-shadow: var(--shadow);
}

.product-preview-media img,
.capability-media img,
.about-intro-visual img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.preview-badge {
  position: absolute;
  right: 18px;
  bottom: 18px;
  display: inline-flex;
  align-items: center;
  gap: 9px;
  padding: 9px 12px;
  border: 1px solid rgba(217, 75, 61, 0.4);
  border-radius: var(--radius);
  background: rgba(12, 17, 16, 0.86);
  color: var(--gold-strong);
  font-size: 13px;
  backdrop-filter: blur(8px);
}

.preview-badge span {
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--jade);
  box-shadow: 0 0 0 4px rgba(217, 123, 106, 0.15);
}

.product-tagline {
  margin: 16px 0 0;
  color: var(--gold);
  font-size: 20px;
  font-weight: 500;
}

.product-preview-copy > p:not(.eyebrow, .product-tagline) {
  max-width: 440px;
  margin: 22px 0 34px;
  color: var(--muted);
  font-size: 16px;
}

.product-preview-copy h2 {
  font-size: 58px;
  line-height: 1.15;
}

.section-heading {
  display: flex;
  align-items: end;
  justify-content: space-between;
  gap: 60px;
  margin-bottom: 76px;
}

.section-heading > div {
  max-width: 700px;
}

.section-heading > p {
  max-width: 460px;
  margin: 0 0 5px;
  color: var(--muted);
}

.section-heading.center {
  display: grid;
  max-width: 660px;
  margin-right: auto;
  margin-left: auto;
  text-align: center;
}

.section-heading.center > p {
  max-width: 640px;
  margin: 0 auto;
}

.vision-section .section-heading h2 {
  font-size: 48px;
}

.vision-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 0;
}

.vision-item {
  position: relative;
  min-height: 190px;
  padding: 30px 46px 14px 0;
  border: 0;
  border-top: 1px solid rgba(217, 75, 61, 0.34);
  background: transparent;
  transition: border-color 180ms ease;
}

.vision-item + .vision-item {
  padding-left: 46px;
  border-left: 1px solid rgba(217, 75, 61, 0.18);
}

.vision-item:hover {
  border-top-color: rgba(217, 75, 61, 0.74);
}

.vision-index {
  position: absolute;
  top: 30px;
  right: 0;
  color: rgba(217, 75, 61, 0.54);
  font-family: var(--font-display);
  font-size: 14px;
  line-height: 1;
}

.vision-icon {
  display: grid;
  width: 50px;
  height: 50px;
  margin-bottom: 72px;
  place-items: center;
  border: 1px solid rgba(217, 75, 61, 0.32);
  border-radius: var(--radius);
  color: var(--gold);
}

.vision-icon svg {
  width: 24px;
  height: 24px;
}

.vision-item h3 {
  margin: 52px 0 10px;
  font-family: var(--font-display);
  font-size: 22px;
  font-weight: 500;
}

.vision-item p {
  max-width: 220px;
  margin: 0;
  color: var(--muted);
  font-size: 14px;
}

.page-hero {
  display: flex;
  min-height: 590px;
  align-items: center;
  padding: 150px 0 90px;
}

.page-hero-shade {
  background: linear-gradient(180deg, rgba(12, 17, 16, 0.72) 0%, rgba(12, 17, 16, 0.58) 48%, rgba(12, 17, 16, 0.86) 100%);
}

.page-hero-content {
  position: relative;
  z-index: 2;
  max-width: 780px;
}

.page-hero-content h1 {
  font-size: 60px;
}

.page-hero-tagline {
  margin: 22px 0 0;
  color: var(--gold);
  font-size: 24px;
  font-weight: 500;
}

.page-hero-summary {
  max-width: 650px;
  margin: 22px 0 0;
  color: var(--text-soft);
  font-size: 17px;
}

.page-hero-content .button {
  margin-top: 34px;
}

.capabilities-section {
  padding-bottom: 64px;
}

.capability-list {
  display: grid;
}

.capability-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 82px;
  align-items: center;
  padding: 70px 0;
  border-top: 1px solid var(--line);
}

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

.capability-media {
  aspect-ratio: 4 / 3;
  border: 1px solid var(--line-strong);
  border-radius: var(--radius);
  background: var(--bg-panel);
  overflow: hidden;
  box-shadow: var(--shadow);
}

.capability-index {
  display: block;
  margin-bottom: 22px;
  color: var(--gold);
  font-family: var(--font-display);
  font-size: 18px;
}

.capability-copy h3 {
  margin: 0;
  font-family: var(--font-display);
  font-size: 32px;
  font-weight: 500;
}

.capability-title {
  margin: 10px 0 0;
  color: var(--gold-strong);
  font-size: 17px;
}

.capability-copy > p:not(.capability-title) {
  margin: 24px 0 0;
  color: var(--text-soft);
}

.capability-points {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 14px;
  margin: 26px 0 0;
  padding: 0;
  list-style: none;
}

.capability-points li {
  position: relative;
  padding-left: 20px;
  color: var(--text-soft);
  font-size: 14px;
}

.capability-points li::before {
  position: absolute;
  top: 0.76em;
  left: 0;
  width: 8px;
  height: 1px;
  background: var(--gold);
  content: "";
}

.demo-frame {
  position: relative;
  height: 660px;
  border: 1px solid var(--line-strong);
  border-radius: var(--radius);
  background: var(--bg-panel);
  overflow: hidden;
}

.demo-iframe {
  display: block;
  width: 100%;
  height: 100%;
  border: 0;
  background: var(--bg-panel);
}

.demo-frame > img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.demo-placeholder {
  position: absolute;
  inset: 0;
  display: grid;
  place-content: center;
  justify-items: center;
  background: rgba(11, 16, 15, 0.56);
  text-align: center;
}

.demo-pulse {
  position: relative;
  width: 18px;
  height: 18px;
  margin-bottom: 20px;
  border: 1px solid var(--jade);
  border-radius: 50%;
}

.demo-pulse::after {
  position: absolute;
  inset: -6px;
  border: 1px solid rgba(217, 123, 106, 0.32);
  border-radius: 50%;
  content: "";
  animation: demo-pulse 2s ease-out infinite;
}

@keyframes demo-pulse {
  from {
    opacity: 0.8;
    transform: scale(0.7);
  }

  to {
    opacity: 0;
    transform: scale(1.5);
  }
}

.demo-placeholder strong {
  font-family: var(--font-display);
  font-size: 28px;
  font-weight: 500;
}

.demo-placeholder p {
  margin: 8px 0 0;
  color: var(--text-soft);
}

.cta-section,
.about-cta-section {
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
  background: var(--bg-soft);
}

.cta-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 50px;
  padding: 66px 0;
}

.cta-inner h2 {
  max-width: 740px;
}

.about-intro-grid {
  display: grid;
  grid-template-columns: 1.05fr 0.95fr;
  gap: 82px;
  align-items: center;
}

.about-intro-copy h2,
.about-value-card h2,
.contact-info h2,
.contact-details-section h2 {
  margin-bottom: 24px;
}

.about-intro-copy .lead {
  margin-bottom: 26px;
}

.about-intro-visual {
  position: relative;
  aspect-ratio: 4 / 3;
  border: 1px solid var(--line-strong);
  border-radius: var(--radius);
  background: var(--bg-panel);
  overflow: hidden;
  box-shadow: var(--shadow);
}

.about-visual-caption {
  position: absolute;
  right: 18px;
  bottom: 18px;
  left: 18px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 18px;
  padding: 14px 16px;
  border: 1px solid rgba(217, 75, 61, 0.36);
  border-radius: var(--radius);
  background: rgba(12, 17, 16, 0.86);
  backdrop-filter: blur(8px);
}

.about-visual-caption span {
  color: var(--gold);
  font-family: var(--font-display);
  font-size: 20px;
}

.about-visual-caption p {
  margin: 0;
  color: var(--text-soft);
  font-size: 13px;
}

.about-values-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 18px;
}

.about-value-card {
  display: grid;
  grid-template-columns: 120px 1fr;
  gap: 34px;
  min-height: 320px;
  padding: 40px 36px;
  border: 1px solid var(--line-strong);
  border-radius: var(--radius);
  background: var(--bg-panel);
}

.value-symbol {
  display: grid;
  width: 88px;
  height: 88px;
  place-items: center;
  border: 1px solid rgba(217, 75, 61, 0.42);
  color: var(--gold-strong);
  font-family: var(--font-display);
  font-size: 42px;
  line-height: 1;
}

.about-value-card h2 {
  font-size: 32px;
}

.about-value-card p:last-child {
  margin: 0;
  color: var(--muted);
}

.contact-hero {
  position: relative;
  padding: 150px 0 92px;
  border-bottom: 1px solid var(--line);
  background:
    linear-gradient(rgba(217, 75, 61, 0.04) 1px, transparent 1px),
    linear-gradient(90deg, rgba(217, 75, 61, 0.04) 1px, transparent 1px),
    var(--bg);
  background-size: 48px 48px;
}

.contact-hero-inner {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 240px;
  gap: 80px;
  align-items: center;
}

.contact-hero-copy h1 {
  margin: 0;
  font-family: var(--font-display);
  font-size: 52px;
  font-weight: 500;
  line-height: 1.3;
}

.contact-hero-copy > p:last-child {
  max-width: 700px;
  margin: 22px 0 0;
  color: var(--text-soft);
  font-size: 17px;
}

.contact-hero-mark span {
  width: 88px;
  height: 88px;
  font-size: 40px;
}

.contact-hero-mark i {
  height: 36px;
}

.contact-grid {
  display: grid;
  grid-template-columns: 0.8fr 1.2fr;
  gap: 82px;
  align-items: start;
}

.contact-info-list {
  display: grid;
  margin-top: 42px;
}

.contact-info-item {
  display: flex;
  align-items: center;
  gap: 18px;
  padding: 22px 0;
  border-top: 1px solid var(--line);
}

.contact-info-item:last-child {
  border-bottom: 1px solid var(--line);
}

.contact-info-icon {
  display: grid;
  width: 44px;
  height: 44px;
  flex: 0 0 44px;
  place-items: center;
  border: 1px solid rgba(217, 75, 61, 0.3);
  border-radius: var(--radius);
  color: var(--gold);
}

.contact-info-icon svg {
  width: 20px;
  height: 20px;
}

.contact-info-item div {
  display: grid;
  min-width: 0;
}

.contact-info-item small {
  color: var(--muted);
  font-size: 12px;
}

.contact-info-item strong {
  overflow-wrap: anywhere;
  color: var(--text-soft);
  font-size: 15px;
  font-weight: 500;
}

.contact-form-wrap {
  border: 1px solid var(--line-strong);
  border-radius: var(--radius);
  background: var(--bg-panel);
  box-shadow: var(--shadow);
}

.contact-form {
  display: grid;
  gap: 22px;
  padding: 38px;
}

.form-heading {
  padding-bottom: 22px;
  border-bottom: 1px solid var(--line);
}

.form-heading span {
  font-family: var(--font-display);
  font-size: 24px;
  font-weight: 500;
}

.form-heading p {
  margin: 6px 0 0;
  color: var(--muted);
  font-size: 13px;
}

.field {
  display: grid;
  gap: 9px;
}

.field > span {
  color: var(--text-soft);
  font-size: 13px;
  font-weight: 500;
}

.field input,
.field textarea {
  width: 100%;
  padding: 13px 15px;
  border: 1px solid var(--line-strong);
  border-radius: var(--radius);
  outline: none;
  background: var(--bg);
  color: var(--text);
  resize: vertical;
  transition: border-color 180ms ease, box-shadow 180ms ease;
}

.field input::placeholder,
.field textarea::placeholder {
  color: #69736f;
}

.field input:focus,
.field textarea:focus {
  border-color: var(--gold);
  box-shadow: 0 0 0 3px rgba(217, 75, 61, 0.1);
}

.submit-button {
  width: 100%;
  margin-top: 4px;
}

.contact-details-grid {
  display: grid;
  grid-template-columns: 0.9fr 1.1fr;
  gap: 80px;
  align-items: start;
}

.contact-placeholders {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 0;
}

.contact-placeholders > div {
  padding: 4px 22px;
  border-left: 1px solid var(--line);
}

.contact-placeholders > div:first-child {
  padding-left: 0;
  border-left: 0;
}

.contact-placeholders span {
  color: var(--gold);
  font-size: 12px;
}

.contact-placeholders p {
  margin: 8px 0 0;
  color: var(--text-soft);
  font-size: 14px;
}

.success-dialog {
  width: min(420px, calc(100% - 40px));
  padding: 0;
  border: 1px solid var(--line-strong);
  border-radius: var(--radius);
  background: var(--bg-panel);
  color: var(--text);
  box-shadow: 0 30px 100px rgba(0, 0, 0, 0.5);
}

.success-dialog::backdrop {
  background: rgba(4, 7, 6, 0.72);
  backdrop-filter: blur(5px);
}

.dialog-inner {
  display: grid;
  justify-items: center;
  padding: 46px 30px 34px;
  text-align: center;
}

.dialog-icon {
  display: grid;
  width: 56px;
  height: 56px;
  margin-bottom: 22px;
  place-items: center;
  border: 1px solid rgba(217, 123, 106, 0.5);
  border-radius: 50%;
  color: var(--jade);
}

.dialog-icon svg {
  width: 26px;
  height: 26px;
}

.dialog-inner h2 {
  font-size: 28px;
}

.dialog-inner p {
  margin: 10px 0 26px;
  color: var(--muted);
}

.dialog-close {
  min-width: 120px;
}

.site-footer {
  padding: 76px 0 26px;
  border-top: 1px solid var(--line);
  background: #120505;
}

.footer-main {
  display: grid;
  grid-template-columns: 1.2fr 1fr 0.8fr;
  gap: 70px;
  padding-bottom: 60px;
}

.brand-footer {
  margin-bottom: 22px;
}

.footer-brand > p {
  margin: 7px 0 0;
  color: var(--muted);
  font-size: 13px;
}

.footer-links {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 40px;
}

.footer-links h3,
.footer-contact h3 {
  margin: 0 0 18px;
  color: var(--gold);
  font-family: var(--font-display);
  font-size: 16px;
  font-weight: 500;
}

.footer-links div,
.footer-contact {
  display: grid;
  align-content: start;
}

.footer-links a,
.footer-contact a {
  width: fit-content;
  margin: 6px 0;
  color: var(--muted);
  font-size: 14px;
  transition: color 180ms ease;
}

.footer-links a:hover,
.footer-contact a:hover {
  color: var(--gold-strong);
}

.footer-contact p {
  margin: 7px 0 0;
  color: var(--muted);
  font-size: 14px;
}

.footer-bottom {
  display: flex;
  justify-content: space-between;
  gap: 24px;
  padding-top: 22px;
  border-top: 1px solid rgba(217, 75, 61, 0.1);
  color: #6d7874;
  font-size: 12px;
}

.js .reveal {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity 650ms ease, transform 650ms ease;
}

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

@media (max-width: 980px) {
  :root {
    --header-height: 70px;
  }

  .desktop-nav,
  .header-cta {
    display: none;
  }

  .menu-toggle {
    display: block;
  }

  .language-switcher {
    margin-left: auto;
  }

  .menu-toggle {
    margin-left: 12px;
  }

  .home-hero {
    min-height: min(860px, calc(100svh - 40px));
  }

  .hero h1,
  .page-hero h1 {
    font-size: 54px;
  }

  .philosophy-grid {
    grid-template-columns: 1fr;
    gap: 54px;
  }

  .philosophy-mark {
    grid-template-columns: 104px 1px 104px;
    justify-content: center;
  }

  .philosophy-mark i {
    width: 48px;
    height: 1px;
    margin: 0 10px;
    align-self: center;
  }

  .product-preview-grid,
  .about-intro-grid,
  .contact-grid,
  .contact-details-grid {
    grid-template-columns: 1fr;
  }

  .product-preview-media {
    max-width: 720px;
  }

  .section-heading {
    align-items: start;
    flex-direction: column;
    gap: 24px;
  }

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

  .vision-item {
    min-height: auto;
    padding-right: 0;
  }

  .vision-item + .vision-item {
    padding-left: 0;
    border-left: 0;
  }

  .vision-icon {
    margin-bottom: 40px;
  }

  .capability-row {
    grid-template-columns: 1fr;
    gap: 38px;
    padding: 56px 0;
  }

  .capability-row.reverse .capability-media {
    order: 0;
  }

  .capability-row .capability-media {
    max-width: 760px;
  }

  .cta-inner {
    align-items: flex-start;
    flex-direction: column;
  }

  .about-values-grid {
    grid-template-columns: 1fr;
  }

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

  .contact-hero-mark {
    display: none;
  }

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

@media (max-width: 680px) {
  .container {
    width: min(100% - 32px, var(--container));
  }

  .home-section,
  .product-section,
  .about-intro-section,
  .about-values-section,
  .contact-main-section,
  .contact-details-section {
    padding: 96px 0;
  }

  .hero h1,
  .page-hero h1 {
    font-size: 38px;
  }

  .hero-subtitle {
    font-size: 14px;
  }

  .hero-intro-lines {
    gap: 8px;
    font-size: 14px;
  }

  .hero-button {
    width: 100%;
  }

  .scroll-cue {
    display: none;
  }

  h2 {
    font-size: 30px;
  }

  .lead {
    font-size: 17px;
  }

  .philosophy-copy h2,
  .product-preview-copy h2,
  .vision-section .section-heading h2 {
    font-size: 34px;
  }

  .philosophy-copy .lead {
    margin-top: 22px;
    font-size: 18px;
  }

  .philosophy-grid {
    gap: 38px;
  }

  .philosophy-mark span {
    width: 76px;
    height: 76px;
    font-size: 36px;
  }

  .product-preview-grid,
  .about-intro-grid,
  .contact-grid,
  .contact-details-grid {
    gap: 48px;
  }

  .preview-badge {
    right: 12px;
    bottom: 12px;
  }

  .vision-grid {
    gap: 0;
  }

  .vision-item {
    padding: 24px 0 12px;
  }

  .vision-item + .vision-item {
    padding-left: 0;
    border-left: 0;
  }

  .vision-item h3 {
    margin-top: 42px;
  }

  .page-hero {
    min-height: 500px;
    padding-top: 124px;
  }

  .page-hero-content h1 {
    font-size: 44px;
  }

  .page-hero-tagline {
    font-size: 20px;
  }

  .page-hero-summary {
    font-size: 15px;
  }

  .section-heading {
    margin-bottom: 46px;
  }

  .capability-row {
    gap: 30px;
    padding: 44px 0;
  }

  .capability-copy h3 {
    font-size: 27px;
  }

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

  .demo-frame {
    height: 560px;
  }

  .demo-placeholder strong {
    font-size: 23px;
  }

  .cta-inner {
    gap: 34px;
    padding: 54px 0;
  }

  .about-value-card {
    grid-template-columns: 1fr;
    gap: 24px;
    padding: 30px 26px;
  }

  .value-symbol {
    width: 72px;
    height: 72px;
    font-size: 34px;
  }

  .contact-hero {
    padding-top: 122px;
  }

  .contact-hero-copy h1 {
    font-size: 38px;
  }

  .contact-form {
    padding: 26px 20px;
  }

  .contact-placeholders {
    grid-template-columns: 1fr;
    gap: 18px;
  }

  .contact-placeholders > div,
  .contact-placeholders > div:first-child {
    padding: 0;
    border-left: 0;
  }

  .footer-main {
    grid-template-columns: 1fr;
    gap: 44px;
  }

  .footer-bottom {
    align-items: flex-start;
    flex-direction: column;
    gap: 8px;
  }
}

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

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

/* Logo version: elegant red-gold light theme */
:root {
  --bg: #160808;
  --bg-soft: #21100b;
  --bg-panel: #2a1410;
  --bg-panel-strong: #352019;
  --line: rgba(212, 169, 95, 0.18);
  --line-strong: #6b4932;
  --text: #fffaf2;
  --text-soft: #eadfd0;
  --muted: #c1aa9b;
  --gold: #d4a95f;
  --gold-strong: #f1cf8b;
  --jade: #6f8f7a;
  --clay: #b95d4b;
  --white: #fffaf2;
}

body {
  background: linear-gradient(135deg, #1a0908 0%, #24120d 46%, #0e0606 100%);
  background-attachment: fixed;
}

.site-header {
  border-bottom: 1px solid rgba(212, 169, 95, 0.2);
  background: rgba(22, 8, 8, 0.9);
  box-shadow: 0 1px 0 rgba(255, 235, 200, 0.04);
}

.site-header.is-scrolled {
  background: rgba(22, 8, 8, 0.97);
  box-shadow: 0 14px 42px rgba(0, 0, 0, 0.28);
}

.brand-mark {
  border: 2px solid rgba(212, 169, 95, 0.58);
  padding: 2px;
  box-shadow: 0 10px 34px rgba(0, 0, 0, 0.28);
}

.button-gold {
  border-color: rgba(255, 224, 166, 0.45);
  background: linear-gradient(135deg, #efd18f 0%, #c99348 100%);
  color: #1c0907;
  box-shadow: 0 10px 28px rgba(201, 147, 72, 0.18);
}

.button-gold:hover {
  background: linear-gradient(135deg, #f7dfa8 0%, #d6a054 100%);
}

.button-outline {
  border-color: rgba(212, 169, 95, 0.48);
  color: #efcf8b;
}

.hero-shade {
  background: linear-gradient(180deg, rgba(18, 8, 7, 0.52) 0%, rgba(40, 20, 12, 0.2) 44%, rgba(12, 5, 4, 0.94) 100%);
}

.page-hero-shade {
  background: linear-gradient(180deg, rgba(18, 8, 7, 0.74) 0%, rgba(40, 20, 12, 0.5) 48%, rgba(12, 5, 4, 0.9) 100%);
}

.philosophy-section,
.vision-section,
.demo-section,
.contact-details-section,
.cta-section,
.about-cta-section {
  background: linear-gradient(180deg, rgba(34, 16, 11, 0.86), rgba(24, 11, 8, 0.9));
}

.solution-card,
.vision-item,
.about-value-card,
.contact-form-wrap,
.success-dialog {
  border-color: rgba(212, 169, 95, 0.24);
  background: linear-gradient(150deg, rgba(42, 20, 16, 0.96), rgba(28, 12, 10, 0.96));
}

.solution-card:hover,
.vision-item:hover {
  border-color: rgba(212, 169, 95, 0.62);
  box-shadow: 0 18px 48px rgba(0, 0, 0, 0.18);
}

.product-preview-media,
.capability-media,
.about-intro-visual,
.demo-frame {
  border-color: rgba(212, 169, 95, 0.28);
  box-shadow: 0 24px 70px rgba(0, 0, 0, 0.28);
}

.site-footer {
  background: linear-gradient(180deg, #170908 0%, #0b0504 100%);
}

.field input,
.field textarea {
  border-color: rgba(212, 169, 95, 0.26);
  background: rgba(20, 9, 8, 0.94);
}

.field input:focus,
.field textarea:focus {
  border-color: #d4a95f;
  box-shadow: 0 0 0 3px rgba(212, 169, 95, 0.12);
}

/* Larger, tighter brand icon and subtle site watermark */
.brand-mark {
  width: 54px;
  height: 54px;
  padding: 1px;
  border-width: 1px;
  background-size: 135% 135%;
}

.brand-footer .brand-mark {
  width: 60px;
  height: 60px;
}

body::after {
  position: fixed;
  right: 24px;
  bottom: 22px;
  z-index: 1;
  width: 180px;
  height: 180px;
  background-image: url("assets/company-logo.jpg");
  background-position: center;
  background-size: contain;
  background-repeat: no-repeat;
  content: "";
  opacity: 0.05;
  pointer-events: none;
  mix-blend-mode: screen;
  filter: grayscale(1);
}

.site-header,
main,
.site-footer {
  position: relative;
  z-index: 2;
}

/* Premium Forbidden City red and warm gold redesign */
:root {
  --bg: #f7eee3;
  --bg-soft: #f0e1d2;
  --bg-panel: #fffaf4;
  --bg-panel-strong: #f8ead9;
  --line: rgba(139, 47, 42, 0.14);
  --line-strong: #e2c9a8;
  --text: #3a1b17;
  --text-soft: #6e4b42;
  --muted: #9b796c;
  --gold: #b98b4b;
  --gold-strong: #8d6130;
  --jade: #6f8f7a;
  --clay: #a8232e;
  --white: #fffaf4;
}

body {
  background:
    linear-gradient(180deg, rgba(255, 255, 255, 0.28), transparent 30%),
    linear-gradient(135deg, #f8f0e7 0%, #f3e4d4 46%, #efe0cf 100%);
  background-attachment: fixed;
  color: var(--text);
}

.site-header {
  border-bottom: 1px solid rgba(139, 47, 42, 0.14);
  background: rgba(255, 251, 246, 0.92);
  box-shadow: 0 1px 0 rgba(139, 47, 42, 0.05);
}

.site-header.is-scrolled {
  background: rgba(255, 251, 246, 0.98);
  box-shadow: 0 12px 34px rgba(115, 64, 48, 0.12);
}

.desktop-nav a,
.mobile-nav a:not(.button) {
  color: var(--text-soft);
}

.desktop-nav a:hover,
.desktop-nav a.is-active,
.mobile-nav a:not(.button).is-active {
  color: var(--clay);
}

.desktop-nav a::after {
  background: var(--clay);
}

.brand-copy strong {
  color: #431d19;
}

.brand-copy small {
  color: var(--muted);
}

.lang-toggle,
.language-menu,
.mobile-nav {
  border-color: var(--line);
  background: rgba(255, 251, 246, 0.98);
}

.language-menu {
  background: #fffaf4;
  box-shadow: 0 20px 54px rgba(101, 53, 42, 0.16);
}

.language-option {
  color: var(--text-soft);
}

.language-option:hover,
.language-option.is-active {
  background: rgba(168, 35, 46, 0.08);
  color: var(--clay);
}

.button-gold {
  border-color: #b9232e;
  background: linear-gradient(135deg, #d54b4b 0%, #9f2028 100%);
  color: #fffaf2;
  box-shadow: 0 12px 28px rgba(138, 35, 39, 0.2);
}

.button-gold:hover {
  background: linear-gradient(135deg, #e15b59 0%, #b22a31 100%);
}

.button-outline {
  border-color: rgba(168, 35, 46, 0.5);
  color: var(--clay);
}

.button-outline:hover {
  border-color: var(--clay);
  background: rgba(168, 35, 46, 0.07);
}

.hero-shade {
  background: linear-gradient(180deg, rgba(84, 23, 24, 0.5) 0%, rgba(112, 48, 38, 0.2) 44%, rgba(76, 20, 21, 0.82) 100%);
}

.page-hero-shade {
  background: linear-gradient(180deg, rgba(84, 23, 24, 0.68) 0%, rgba(112, 48, 38, 0.44) 48%, rgba(76, 20, 21, 0.84) 100%);
}

.hero h1,
.page-hero h1 {
  color: #fff8ef;
}

.hero-subtitle,
.hero-intro-lines {
  color: rgba(255, 248, 239, 0.86);
}

.hero-eyebrow,
.eyebrow {
  color: #d9a04f;
}

.philosophy-section,
.vision-section,
.demo-section,
.contact-details-section,
.cta-section,
.about-cta-section {
  border-color: rgba(139, 47, 42, 0.12);
  background: rgba(255, 250, 244, 0.58);
}

.philosophy-mark span,
.contact-hero-mark span,
.value-symbol {
  border-color: rgba(139, 47, 42, 0.28);
  background: #fffaf4;
  color: #8f2930;
}

.solution-card,
.vision-item,
.about-value-card,
.contact-form-wrap,
.success-dialog {
  border-color: #e2c9a8;
  background: #fffaf4;
  box-shadow: 0 16px 46px rgba(109, 65, 53, 0.08);
}

.vision-item {
  border-color: rgba(139, 47, 42, 0.22);
}

.vision-index {
  color: rgba(168, 35, 46, 0.34);
}

.product-preview-media,
.capability-media,
.about-intro-visual,
.demo-frame {
  border-color: #e2c9a8;
  box-shadow: 0 24px 70px rgba(109, 65, 53, 0.12);
}

.preview-badge,
.about-visual-caption {
  border-color: rgba(139, 47, 42, 0.24);
  background: rgba(255, 250, 244, 0.92);
}

.field input,
.field textarea {
  border-color: #e0c7a8;
  background: #fffaf4;
  color: var(--text);
}

.field input:focus,
.field textarea:focus {
  border-color: #a8232e;
  box-shadow: 0 0 0 3px rgba(168, 35, 46, 0.08);
}

.site-footer {
  border-top-color: rgba(139, 47, 42, 0.16);
  background: linear-gradient(180deg, #7d2023 0%, #5b1619 100%);
  color: #fff8ef;
}

.site-footer a,
.site-footer p,
.footer-bottom {
  color: rgba(255, 248, 239, 0.78);
}

.footer-links h3,
.footer-contact h3 {
  color: #e8c179;
}

.footer-bottom {
  border-top-color: rgba(255, 248, 239, 0.14);
}

.scroll-cue {
  border-color: rgba(232, 193, 121, 0.7);
}

.scroll-cue span {
  background: #e8c179;
}

/* Language switcher interaction fix */
.site-header,
.header-inner,
.header-cta,
.language-switcher,
.lang-toggle,
.menu-toggle {
  position: relative;
}

.language-switcher {
  z-index: 300;
  margin-left: 10px;
  pointer-events: auto;
}

.lang-toggle {
  z-index: 301;
  pointer-events: auto;
}

.language-menu {
  z-index: 310;
  pointer-events: auto;
}

.language-switcher.is-open .language-menu {
  pointer-events: auto;
}

@media (max-width: 980px) {
  .language-switcher {
    margin-right: 4px;
    margin-left: auto;
  }

  .menu-toggle {
    margin-left: 6px;
  }
}

/* Floating right-side language menu */
.language-switcher {
  position: static;
}

.language-menu {
  position: fixed;
  top: calc(var(--header-height) + 10px);
  right: 20px;
  left: auto;
  width: 176px;
  z-index: 1200;
  border: 1px solid rgba(139, 47, 42, 0.22);
  border-radius: 12px;
  background: rgba(255, 250, 244, 0.98);
  box-shadow: 0 24px 70px rgba(75, 31, 27, 0.24);
}

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

@media (max-width: 680px) {
  .language-menu {
    right: 12px;
  }
}

/* 联系表单：提交反馈 —— 提交失败必须有地方说话，否则用户只看到「点了没反应」。
   颜色走 --clay 而不是写死红：新版主色本身就偏红，再叠一层纯红会分不出层级。 */
.form-error {
  margin: 0;
  padding: 12px 14px;
  border-radius: var(--radius);
  border: 1px solid rgba(217, 123, 106, 0.45);
  background: rgba(217, 123, 106, 0.14);
  color: var(--text-soft);
  font-size: 0.92rem;
  line-height: 1.6;
}

.field-optional {
  /* 括号是内容的一部分：中文「邮箱选填」挨在一起还看得过去，英文变成
     「Emailoptional」就明显是个 bug。用伪元素而不是写进 HTML —— 那段文字要被
     i18n 按中文原文当 key 翻译，掺进括号就查不到词条了。 */
  margin-left: 6px;
  font-style: normal;
  font-size: 0.78rem;
  color: var(--muted);
}

.field-optional::before {
  content: "（";
}

.field-optional::after {
  content: "）";
}

html[lang="en"] .field-optional::before,
html[lang="de"] .field-optional::before,
html[lang="es"] .field-optional::before,
html[lang="ru"] .field-optional::before {
  content: " (";
}

html[lang="en"] .field-optional::after,
html[lang="de"] .field-optional::after,
html[lang="es"] .field-optional::after,
html[lang="ru"] .field-optional::after {
  content: ")";
}

/* 提交中：按钮变灰且不可点。后端按手机号每天限 3 次，连点会把配额打光 */
.submit-button.is-loading,
.submit-button[disabled] {
  opacity: 0.6;
  cursor: not-allowed;
}

.submit-button.is-loading span::after {
  content: "…";
}