:root {
  color-scheme: dark;
  --bg: #0b0f12;
  --bg-soft: #11171b;
  --bg-raised: #182025;
  --text: #f2f0e9;
  --muted: #a7afb4;
  --line: rgba(198, 204, 208, 0.22);
  --accent: #d58738;
  --accent-bright: #efa24e;
  --max: 1240px;
  --header: 72px;
  font-family: "Microsoft YaHei UI", "PingFang SC", "Noto Sans CJK SC", Arial, sans-serif;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
  scroll-padding-top: calc(var(--header) + 20px);
}

body {
  margin: 0;
  min-width: 320px;
  overflow-x: hidden;
  background: var(--bg);
  color: var(--text);
  font-size: 16px;
  line-height: 1.7;
  text-rendering: optimizeLegibility;
}

body.menu-open {
  overflow: hidden;
}

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

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

button,
input,
textarea {
  font: inherit;
}

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

:focus-visible {
  outline: 2px solid var(--accent-bright);
  outline-offset: 4px;
}

.skip-link {
  position: fixed;
  z-index: 100;
  top: 12px;
  left: 12px;
  padding: 10px 14px;
  transform: translateY(-160%);
  background: var(--accent);
  color: #0b0f12;
  font-weight: 700;
}

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

.section-shell {
  width: min(calc(100% - 64px), var(--max));
  margin-inline: auto;
}

.site-header {
  position: fixed;
  z-index: 50;
  top: 0;
  left: 0;
  display: flex;
  align-items: center;
  justify-content: space-between;
  width: 100%;
  height: var(--header);
  padding: 0 max(32px, calc((100vw - var(--max)) / 2));
  border-bottom: 1px solid var(--line);
  background: rgba(11, 15, 18, 0.9);
  backdrop-filter: blur(18px);
}

.brand,
.footer-brand {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  min-width: 0;
}

.brand {
  min-height: 44px;
}

.brand-mark {
  position: relative;
  display: inline-block;
  flex: 0 0 30px;
  width: 30px;
  height: 30px;
  border: 2px solid var(--text);
  border-radius: 50%;
}

.brand-mark::after {
  position: absolute;
  top: 13px;
  left: 20px;
  width: 15px;
  height: 2px;
  background: var(--accent);
  content: "";
  transform: rotate(-24deg);
  transform-origin: left center;
}

.brand-mark span {
  position: absolute;
  inset: 5px;
  border: 1px solid var(--muted);
  border-radius: 50%;
}

.brand-name {
  overflow: hidden;
  font-size: 15px;
  font-weight: 700;
  letter-spacing: 0.03em;
  white-space: nowrap;
  text-overflow: ellipsis;
}

.site-nav {
  display: flex;
  align-items: center;
  gap: 30px;
}

.site-nav a {
  position: relative;
  display: inline-flex;
  align-items: center;
  min-height: 44px;
  color: var(--muted);
  font-size: 14px;
  transition: color 180ms ease;
}

.site-nav a::after {
  position: absolute;
  right: 0;
  bottom: 4px;
  left: 0;
  height: 1px;
  background: var(--accent);
  content: "";
  transform: scaleX(0);
  transform-origin: left;
  transition: transform 180ms ease;
}

.site-nav a:hover,
.site-nav a:focus-visible {
  color: var(--text);
}

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

.menu-toggle {
  display: none;
}

.hero {
  position: relative;
  display: grid;
  align-items: end;
  min-height: 780px;
  padding: calc(var(--header) + 96px) max(32px, calc((100vw - var(--max)) / 2)) 92px;
  isolation: isolate;
}

.hero-media,
.hero-shade {
  position: absolute;
  z-index: -2;
  inset: 0;
  width: 100%;
  height: 100%;
}

.hero-media {
  object-fit: cover;
  object-position: 57% center;
}

.hero-shade {
  z-index: -1;
  background:
    linear-gradient(90deg, rgba(7, 10, 12, 0.97) 0%, rgba(7, 10, 12, 0.8) 35%, rgba(7, 10, 12, 0.08) 70%),
    linear-gradient(0deg, rgba(7, 10, 12, 0.75) 0%, transparent 42%);
}

.hero::after {
  position: absolute;
  right: max(32px, calc((100vw - var(--max)) / 2));
  bottom: 90px;
  width: min(34vw, 460px);
  height: 1px;
  background: linear-gradient(90deg, var(--accent), transparent);
  content: "";
}

.hero-scale {
  position: absolute;
  top: calc(var(--header) + 38px);
  right: max(32px, calc((100vw - var(--max)) / 2));
  display: grid;
  grid-template-columns: repeat(3, 88px);
  color: rgba(242, 240, 233, 0.62);
  font-size: 11px;
  letter-spacing: 0.15em;
}

.hero-scale span {
  padding-top: 8px;
  border-top: 1px solid rgba(242, 240, 233, 0.35);
}

.hero-content {
  width: min(760px, 68vw);
}

.kicker {
  margin: 0 0 20px;
  color: var(--accent-bright);
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 0.18em;
}

h1,
h2,
h3,
p {
  overflow-wrap: anywhere;
}

h1,
h2,
h3 {
  margin-top: 0;
  font-weight: 650;
  line-height: 1.14;
}

h1 {
  margin-bottom: 28px;
  font-size: clamp(48px, 6vw, 86px);
  letter-spacing: -0.055em;
}

h2 {
  margin-bottom: 24px;
  font-size: clamp(36px, 4.4vw, 64px);
  letter-spacing: -0.045em;
}

h3 {
  margin-bottom: 20px;
  font-size: clamp(30px, 3.2vw, 48px);
  letter-spacing: -0.035em;
}

.hero-copy {
  max-width: 580px;
  margin: 0 0 36px;
  color: #d2d6d8;
  font-size: 18px;
}

.primary-link {
  display: inline-flex;
  align-items: center;
  justify-content: space-between;
  width: 210px;
  min-height: 52px;
  padding: 0 18px;
  border: 1px solid var(--accent);
  color: var(--text);
  font-weight: 700;
  transition: background 180ms ease, color 180ms ease;
}

.primary-link:hover,
.primary-link:focus-visible {
  background: var(--accent);
  color: #0b0f12;
}

.section-heading {
  max-width: 820px;
}

.positioning {
  padding-top: 150px;
  padding-bottom: 160px;
}

.positioning-grid {
  display: grid;
  grid-template-columns: 0.82fr 1.18fr;
  gap: 8vw;
  align-items: end;
  margin-top: 70px;
}

.positioning-copy {
  padding-bottom: 12px;
}

.positioning-copy p {
  color: var(--muted);
}

.positioning-copy .lead {
  margin-top: 0;
  color: var(--text);
  font-size: 21px;
}

.fact-lines {
  margin: 46px 0 0;
}

.fact-lines div {
  display: grid;
  grid-template-columns: 92px 1fr;
  gap: 20px;
  padding: 17px 0;
  border-top: 1px solid var(--line);
}

.fact-lines dt {
  color: var(--accent-bright);
  font-size: 13px;
}

.fact-lines dd {
  margin: 0;
  color: #c7cdd0;
}

.material-figure {
  margin: 0;
}

.material-figure img {
  width: 100%;
  aspect-ratio: 1.3;
  object-fit: cover;
}

.material-figure figcaption {
  padding-top: 14px;
  color: var(--muted);
  font-size: 13px;
  text-align: right;
}

.process {
  border-top: 1px solid var(--line);
  background: var(--bg-soft);
}

.process-intro {
  display: grid;
  grid-template-columns: 1fr 380px;
  gap: 8vw;
  align-items: end;
  padding-top: 140px;
  padding-bottom: 100px;
}

.section-note {
  margin: 0 0 22px;
  color: var(--muted);
}

.process-flow {
  margin: 0;
  padding: 0;
  list-style: none;
}

.process-step {
  position: relative;
  display: grid;
  grid-template-columns: 80px 0.74fr 1.26fr;
  gap: 44px;
  align-items: center;
  min-height: 660px;
  padding-top: 88px;
  padding-bottom: 88px;
  border-top: 1px solid var(--line);
}

.process-step.reverse {
  grid-template-columns: 80px 1.26fr 0.74fr;
}

.process-step.reverse .step-copy {
  grid-column: 3;
}

.process-step.reverse .step-media {
  grid-column: 2;
  grid-row: 1;
}

.step-number {
  align-self: start;
  padding-top: 10px;
  color: var(--accent-bright);
  font-size: 13px;
  letter-spacing: 0.16em;
}

.step-copy p {
  max-width: 420px;
  margin-bottom: 44px;
  color: var(--muted);
}

.step-copy span {
  color: #69747a;
  font-size: 12px;
  letter-spacing: 0.2em;
  text-transform: uppercase;
}

.step-media {
  margin: 0;
  overflow: hidden;
}

.step-media img {
  width: 100%;
  aspect-ratio: 1.45;
  object-fit: cover;
  transition: transform 700ms cubic-bezier(0.2, 0.65, 0.3, 1);
}

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

.innovation {
  display: grid;
  grid-template-columns: 1.08fr 0.92fr;
  gap: 9vw;
  align-items: center;
  min-height: 830px;
  padding-top: 140px;
  padding-bottom: 140px;
}

.innovation-media {
  margin: 0;
}

.innovation-media img {
  width: 100%;
  aspect-ratio: 0.95;
  object-fit: cover;
}

.innovation-copy > p:not(.kicker) {
  color: var(--muted);
  font-size: 18px;
}

.evidence-line {
  margin-top: 54px;
  padding-top: 22px;
  border-top: 1px solid var(--line);
}

.evidence-line span {
  display: block;
  margin-bottom: 14px;
  color: var(--accent-bright);
  font-size: 13px;
  font-weight: 700;
}

.evidence-line p {
  margin: 0;
  color: #c7cdd0;
}

.responsibility {
  position: relative;
  display: flex;
  align-items: flex-end;
  min-height: 760px;
  isolation: isolate;
}

.responsibility-media,
.responsibility-shade {
  position: absolute;
  z-index: -2;
  inset: 0;
  width: 100%;
  height: 100%;
}

.responsibility-media {
  object-fit: cover;
  object-position: center;
}

.responsibility-shade {
  z-index: -1;
  background: linear-gradient(90deg, rgba(7, 10, 12, 0.96) 0%, rgba(7, 10, 12, 0.74) 46%, rgba(7, 10, 12, 0.18) 78%);
}

.responsibility-content {
  padding-top: 120px;
  padding-bottom: 110px;
}

.responsibility-content h2,
.responsibility-content p {
  max-width: 680px;
}

.responsibility-content > p:last-child {
  color: #d2d6d8;
  font-size: 18px;
}

.contact {
  display: grid;
  grid-template-columns: 0.8fr 1.2fr;
  gap: 9vw;
  padding-top: 150px;
  padding-bottom: 150px;
}

.contact-heading p:last-child {
  max-width: 460px;
  color: var(--muted);
}

.contact-form {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 30px 24px;
  align-self: start;
}

.form-row {
  display: grid;
  gap: 10px;
}

.form-row-wide {
  grid-column: 1 / -1;
}

.form-row label {
  color: #c7cdd0;
  font-size: 14px;
}

.form-row input,
.form-row textarea {
  width: 100%;
  min-height: 52px;
  padding: 12px 0;
  border: 0;
  border-bottom: 1px solid #526069;
  border-radius: 0;
  background: transparent;
  color: var(--text);
  resize: vertical;
}

.form-row input:focus,
.form-row textarea:focus {
  border-bottom-color: var(--accent-bright);
  outline: 2px solid var(--accent-bright);
  outline-offset: 3px;
}

.form-actions {
  display: grid;
  grid-template-columns: 180px 1fr;
  gap: 22px;
  align-items: center;
  margin-top: 10px;
}

.form-actions button {
  min-height: 52px;
  border: 1px solid var(--accent);
  border-radius: 0;
  background: var(--accent);
  color: #0b0f12;
  font-weight: 750;
  cursor: pointer;
  transition: background 180ms ease, color 180ms ease;
}

.form-actions button:hover,
.form-actions button:focus-visible {
  background: transparent;
  color: var(--text);
}

.form-status {
  min-height: 28px;
  margin: 0;
  color: var(--accent-bright);
  font-size: 14px;
}

.site-footer {
  display: grid;
  grid-template-columns: 1fr auto auto;
  gap: 36px;
  align-items: center;
  min-height: 130px;
  padding: 24px max(32px, calc((100vw - var(--max)) / 2));
  border-top: 1px solid var(--line);
  color: var(--muted);
  font-size: 13px;
}

.footer-brand strong {
  color: var(--text);
  font-size: 14px;
}

.site-footer p {
  margin: 0;
}

.site-footer a {
  display: inline-flex;
  align-items: center;
  min-height: 44px;
  color: var(--text);
}

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

.reveal.is-visible {
  opacity: 1;
  transform: none;
}

@media (max-width: 1080px) {
  .site-nav {
    gap: 18px;
  }

  .site-nav a {
    font-size: 13px;
  }

  .positioning-grid,
  .innovation,
  .contact {
    gap: 6vw;
  }

  .process-step {
    grid-template-columns: 56px 0.82fr 1.18fr;
    gap: 28px;
  }

  .process-step.reverse {
    grid-template-columns: 56px 1.18fr 0.82fr;
  }
}

@media (max-width: 840px) {
  :root {
    --header: 64px;
  }

  .section-shell {
    width: min(calc(100% - 40px), var(--max));
  }

  .site-header {
    padding-inline: 20px;
  }

  .brand-name {
    max-width: calc(100vw - 142px);
  }

  .menu-toggle {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 10px;
    min-width: 64px;
    min-height: 44px;
    padding: 0;
    border: 0;
    background: transparent;
    color: var(--text);
    cursor: pointer;
  }

  .menu-label {
    font-size: 13px;
  }

  .menu-lines {
    display: grid;
    gap: 6px;
    width: 20px;
  }

  .menu-lines i {
    display: block;
    width: 100%;
    height: 1px;
    background: currentColor;
    transition: transform 180ms ease;
  }

  .menu-toggle[aria-expanded="true"] .menu-lines i:first-child {
    transform: translateY(3.5px) rotate(45deg);
  }

  .menu-toggle[aria-expanded="true"] .menu-lines i:last-child {
    transform: translateY(-3.5px) rotate(-45deg);
  }

  .site-nav {
    position: absolute;
    top: 100%;
    right: 0;
    left: 0;
    display: grid;
    align-content: start;
    gap: 0;
    height: calc(100vh - var(--header));
    overflow-y: auto;
    padding: 28px 20px;
    visibility: hidden;
    background: var(--bg);
    opacity: 0;
    transform: translateY(-12px);
    transition: opacity 180ms ease, transform 180ms ease, visibility 180ms;
  }

  .site-nav.is-open {
    visibility: visible;
    opacity: 1;
    transform: translateY(0);
  }

  .site-nav a {
    min-height: 58px;
    border-bottom: 1px solid var(--line);
    color: var(--text);
    font-size: 18px;
  }

  .hero {
    min-height: 720px;
    padding: calc(var(--header) + 80px) 20px 64px;
  }

  .hero-content {
    width: min(700px, 90vw);
  }

  .hero-shade {
    background:
      linear-gradient(90deg, rgba(7, 10, 12, 0.94) 0%, rgba(7, 10, 12, 0.58) 65%, rgba(7, 10, 12, 0.18) 100%),
      linear-gradient(0deg, rgba(7, 10, 12, 0.82) 0%, transparent 52%);
  }

  .hero-scale,
  .hero::after {
    right: 20px;
  }

  .positioning-grid,
  .process-intro,
  .innovation,
  .contact {
    grid-template-columns: 1fr;
  }

  .positioning-grid {
    gap: 54px;
  }

  .process-intro {
    gap: 24px;
  }

  .section-note {
    max-width: 560px;
  }

  .process-step,
  .process-step.reverse {
    grid-template-columns: 46px 1fr;
    gap: 20px;
    min-height: 0;
  }

  .process-step .step-copy,
  .process-step.reverse .step-copy {
    grid-column: 2;
    grid-row: 1;
  }

  .process-step .step-media,
  .process-step.reverse .step-media {
    grid-column: 1 / -1;
    grid-row: 2;
  }

  .innovation {
    min-height: 0;
  }

  .innovation-media {
    order: 2;
  }

  .contact {
    gap: 66px;
  }
}

@media (max-width: 560px) {
  .section-shell {
    width: min(calc(100% - 32px), var(--max));
  }

  .brand-name {
    font-size: 13px;
  }

  .brand-mark {
    flex-basis: 27px;
    width: 27px;
    height: 27px;
  }

  .brand-mark::after {
    top: 12px;
    left: 18px;
    width: 13px;
  }

  .hero {
    min-height: 680px;
    padding-inline: 16px;
  }

  .hero-media {
    object-position: 66% center;
  }

  .hero-scale {
    display: none;
  }

  h1 {
    font-size: clamp(38px, 11vw, 52px);
  }

  h2 {
    font-size: clamp(32px, 9vw, 44px);
  }

  h3 {
    font-size: 32px;
  }

  .hero-copy,
  .positioning-copy .lead,
  .innovation-copy > p:not(.kicker),
  .responsibility-content > p:last-child {
    font-size: 16px;
  }

  .positioning,
  .process-intro,
  .innovation,
  .contact {
    padding-top: 100px;
    padding-bottom: 100px;
  }

  .positioning-grid {
    margin-top: 48px;
  }

  .fact-lines div {
    grid-template-columns: 1fr;
    gap: 4px;
  }

  .process-step,
  .process-step.reverse {
    grid-template-columns: 34px 1fr;
    padding-top: 66px;
    padding-bottom: 66px;
  }

  .step-copy p {
    margin-bottom: 28px;
  }

  .step-media img {
    aspect-ratio: 1.05;
  }

  .innovation {
    gap: 56px;
  }

  .innovation-media img {
    aspect-ratio: 1.08;
  }

  .responsibility {
    min-height: 680px;
  }

  .responsibility-shade {
    background: linear-gradient(0deg, rgba(7, 10, 12, 0.95) 0%, rgba(7, 10, 12, 0.55) 72%, rgba(7, 10, 12, 0.28) 100%);
  }

  .responsibility-content {
    padding-top: 90px;
    padding-bottom: 74px;
  }

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

  .form-row-wide {
    grid-column: auto;
  }

  .form-actions {
    grid-template-columns: 1fr;
  }

  .form-actions button {
    width: 100%;
  }

  .site-footer {
    grid-template-columns: 1fr;
    gap: 10px;
    padding: 38px 16px;
  }

  .site-footer a {
    width: max-content;
  }
}

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

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

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