:root {
  --ink: #080b0e;
  --ink-soft: #11161a;
  --paper: #f4f7f7;
  --white: #ffffff;
  --muted: #8e989e;
  --line: rgba(8, 11, 14, 0.14);
  --line-light: rgba(255, 255, 255, 0.16);
  --mint: #26d5c5;
  --blue: #4b8dff;
  --yellow: #e5c65b;
  --coral: #ef776a;
  --shell: 1240px;
  --radius: 6px;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
  scroll-padding-top: 78px;
}

body {
  margin: 0;
  color: var(--ink);
  background: var(--paper);
  font-family: Inter, "PingFang SC", "Microsoft YaHei", Arial, sans-serif;
  font-size: 16px;
  line-height: 1.6;
  letter-spacing: 0;
  overflow-x: hidden;
}

body.menu-open,
body.dialog-open {
  overflow: hidden;
}

button,
input,
textarea,
select {
  color: inherit;
  font: inherit;
  letter-spacing: 0;
}

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

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

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

button {
  border: 0;
}

.shell {
  width: min(calc(100% - 64px), var(--shell));
  margin: 0 auto;
}

.scroll-progress {
  position: fixed;
  inset: 0 0 auto;
  z-index: 100;
  height: 2px;
  pointer-events: none;
}

.scroll-progress span {
  display: block;
  width: 0;
  height: 100%;
  background: var(--mint);
}

.site-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 90;
  display: grid;
  grid-template-columns: 1fr auto 1fr;
  align-items: center;
  height: 78px;
  padding: 0 34px;
  color: var(--white);
  border-bottom: 1px solid rgba(255, 255, 255, 0.14);
  transition: background-color 220ms ease, border-color 220ms ease, height 220ms ease;
}

.site-header.is-scrolled,
.site-header.menu-active {
  height: 68px;
  background: rgba(8, 11, 14, 0.94);
  border-color: var(--line-light);
  backdrop-filter: blur(18px);
}

.brand {
  justify-self: start;
  display: inline-flex;
  align-items: center;
  gap: 12px;
  min-width: 0;
}

.brand > img {
  width: 48px;
  height: 30px;
  object-fit: contain;
}

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

.brand-copy strong {
  font-size: 18px;
  font-weight: 700;
}

.brand-copy small {
  margin-top: 4px;
  color: rgba(255, 255, 255, 0.58);
  font-size: 9px;
}

.desktop-nav {
  display: flex;
  align-items: center;
  gap: 36px;
}

.desktop-nav a {
  position: relative;
  color: rgba(255, 255, 255, 0.76);
  font-size: 14px;
  transition: color 180ms ease;
}

.desktop-nav a::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: -10px;
  height: 1px;
  background: var(--mint);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform 180ms ease;
}

.desktop-nav a:hover,
.desktop-nav a:focus-visible,
.desktop-nav a.is-active {
  color: var(--white);
}

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

.header-cta {
  justify-self: end;
  display: inline-flex;
  align-items: center;
  gap: 9px;
  min-height: 38px;
  padding: 0 4px 0 14px;
  font-size: 14px;
}

.header-cta svg {
  width: 32px;
  height: 32px;
  padding: 8px;
  color: var(--ink);
  background: var(--mint);
  border-radius: 50%;
  transition: transform 180ms ease;
}

.header-cta:hover svg {
  transform: translate(2px, -2px);
}

.icon-button {
  display: inline-grid;
  width: 42px;
  height: 42px;
  place-items: center;
  padding: 0;
  color: inherit;
  background: transparent;
  border: 1px solid currentColor;
  border-radius: 50%;
  cursor: pointer;
}

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

.menu-toggle,
.mobile-nav {
  display: none;
}

.hero {
  position: relative;
  height: calc(100svh - 44px);
  min-height: 680px;
  max-height: 880px;
  overflow: hidden;
  color: var(--white);
  background: #0b1117;
}

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

.hero-media {
  object-fit: cover;
  object-position: center 45%;
  filter: brightness(0.44) saturate(0.78) contrast(1.06);
  transform: scale(1.01);
}

.hero-shade {
  background: rgba(6, 10, 14, 0.28);
}

.hero-grid {
  left: 50%;
  width: min(calc(100% - 64px), var(--shell));
  height: 100%;
  border-inline: 1px solid rgba(255, 255, 255, 0.1);
  transform: translateX(-50%);
}

.hero-grid::before,
.hero-grid::after {
  content: "";
  position: absolute;
  top: 0;
  bottom: 0;
  width: 1px;
  background: rgba(255, 255, 255, 0.06);
}

.hero-grid::before {
  left: 33.33%;
}

.hero-grid::after {
  right: 33.33%;
}

.hero-content {
  position: relative;
  z-index: 2;
  display: flex;
  height: 100%;
  align-items: flex-end;
  justify-content: space-between;
  gap: 48px;
  padding-bottom: 112px;
}

.hero-copy {
  width: min(900px, calc(100% - 290px));
  flex: 1 1 auto;
}

.eyebrow {
  display: flex;
  align-items: center;
  gap: 18px;
  margin-bottom: 24px;
  font-size: 11px;
  font-weight: 700;
}

.eyebrow span:first-child {
  color: var(--mint);
}

.eyebrow span + span {
  position: relative;
  padding-left: 18px;
  color: rgba(255, 255, 255, 0.66);
}

.eyebrow span + span::before {
  content: "";
  position: absolute;
  left: 0;
  top: 50%;
  width: 4px;
  height: 4px;
  background: rgba(255, 255, 255, 0.45);
  border-radius: 50%;
  transform: translateY(-50%);
}

.hero h1 {
  max-width: none;
  margin: 0;
  font-size: 52px;
  font-weight: 650;
  line-height: 1.14;
  letter-spacing: 0;
  white-space: nowrap;
}

.hero-lead {
  margin: 24px 0 6px;
  font-size: 26px;
  font-weight: 500;
  line-height: 1.4;
}

.hero-description {
  max-width: 690px;
  margin: 0;
  color: rgba(255, 255, 255, 0.68);
  font-size: 16px;
}

.hero-actions {
  display: flex;
  gap: 12px;
  margin-top: 34px;
}

.button {
  display: inline-flex;
  min-height: 48px;
  align-items: center;
  justify-content: center;
  gap: 10px;
  padding: 0 22px;
  border: 1px solid transparent;
  border-radius: 3px;
  font-size: 14px;
  font-weight: 650;
  cursor: pointer;
  transition: transform 180ms ease, background-color 180ms ease, color 180ms ease, border-color 180ms ease;
}

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

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

.button-primary {
  color: var(--ink);
  background: var(--mint);
}

.button-primary:hover {
  background: #6ce9dc;
}

.button-ghost {
  color: var(--white);
  background: rgba(8, 11, 14, 0.32);
  border-color: rgba(255, 255, 255, 0.36);
}

.button-ghost:hover {
  background: rgba(8, 11, 14, 0.62);
  border-color: rgba(255, 255, 255, 0.7);
}

.button-dark {
  color: var(--white);
  background: var(--ink);
}

.hero-signal {
  display: flex;
  align-items: center;
  gap: 12px;
  min-width: 245px;
  padding: 18px 0;
  border-top: 1px solid rgba(255, 255, 255, 0.36);
  border-bottom: 1px solid rgba(255, 255, 255, 0.14);
}

.signal-pulse {
  position: relative;
  width: 12px;
  height: 12px;
  flex: 0 0 12px;
  background: var(--mint);
  border: 3px solid rgba(38, 213, 197, 0.32);
  border-radius: 50%;
  background-clip: padding-box;
  animation: signal 1.8s ease-out infinite;
}

.hero-signal div {
  display: grid;
}

.hero-signal small {
  color: rgba(255, 255, 255, 0.5);
  font-size: 9px;
}

.hero-signal strong {
  margin-top: 3px;
  font-size: 12px;
  font-weight: 500;
}

.scroll-cue {
  position: absolute;
  right: 30px;
  bottom: 32px;
  z-index: 2;
  display: flex;
  align-items: center;
  gap: 10px;
  color: rgba(255, 255, 255, 0.65);
  font-size: 9px;
  writing-mode: vertical-rl;
}

.scroll-cue svg {
  width: 16px;
  height: 16px;
}

.fact-band {
  color: var(--white);
  background: var(--ink);
  border-top: 1px solid rgba(255, 255, 255, 0.12);
}

.fact-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
}

.fact {
  display: grid;
  min-height: 150px;
  align-content: center;
  padding: 26px 34px;
  border-left: 1px solid var(--line-light);
}

.fact:last-child {
  border-right: 1px solid var(--line-light);
}

.fact strong {
  color: var(--mint);
  font-size: 36px;
  font-weight: 600;
  line-height: 1;
}

.fact span {
  margin-top: 12px;
  color: rgba(255, 255, 255, 0.56);
  font-size: 13px;
}

.section {
  padding: 124px 0;
}

.section-dark {
  color: var(--white);
  background: #0d1215;
}

.section-heading {
  display: grid;
  grid-template-columns: minmax(0, 1.25fr) minmax(300px, 0.75fr);
  gap: 80px;
  align-items: end;
  margin-bottom: 70px;
}

.section-index {
  display: block;
  margin-bottom: 22px;
  color: var(--mint);
  font-size: 11px;
  font-weight: 750;
}

.section-heading h2,
.about-copy h2,
.cooperation-intro h2 {
  margin: 0;
  font-size: 46px;
  font-weight: 620;
  line-height: 1.23;
  letter-spacing: 0;
}

.section-heading > p {
  margin: 0;
  color: rgba(255, 255, 255, 0.56);
  font-size: 15px;
}

.business-list {
  border-bottom: 1px solid var(--line-light);
}

.business-item {
  position: relative;
  display: grid;
  grid-template-columns: 48px 54px minmax(300px, 1fr) minmax(280px, 0.7fr);
  gap: 26px;
  align-items: center;
  min-height: 158px;
  padding: 24px 18px 24px 0;
  border-top: 1px solid var(--line-light);
  overflow: hidden;
  transition: background-color 220ms ease, padding 220ms ease;
}

.business-item::before {
  content: "";
  position: absolute;
  inset: 0 auto 0 0;
  width: 3px;
  background: var(--mint);
  transform: scaleY(0);
  transition: transform 220ms ease;
}

.business-item[data-accent="blue"]::before {
  background: var(--blue);
}

.business-item[data-accent="yellow"]::before {
  background: var(--yellow);
}

.business-item[data-accent="coral"]::before {
  background: var(--coral);
}

.business-item:hover {
  padding-left: 20px;
  background: rgba(255, 255, 255, 0.035);
}

.business-item:hover::before {
  transform: scaleY(1);
}

.business-number {
  align-self: start;
  padding-top: 10px;
  color: rgba(255, 255, 255, 0.35);
  font-size: 11px;
}

.business-icon {
  display: grid;
  width: 50px;
  height: 50px;
  place-items: center;
  color: var(--mint);
  border: 1px solid currentColor;
  border-radius: 50%;
}

[data-accent="blue"] .business-icon {
  color: var(--blue);
}

[data-accent="yellow"] .business-icon {
  color: var(--yellow);
}

[data-accent="coral"] .business-icon {
  color: var(--coral);
}

.business-icon svg {
  width: 22px;
  height: 22px;
}

.business-main h3 {
  margin: 0 0 8px;
  font-size: 23px;
  font-weight: 580;
}

.business-main p {
  max-width: 620px;
  margin: 0;
  color: rgba(255, 255, 255, 0.52);
  font-size: 14px;
}

.business-tags {
  display: flex;
  flex-wrap: wrap;
  justify-content: flex-end;
  gap: 8px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.business-tags li {
  min-width: 78px;
  padding: 7px 10px;
  color: rgba(255, 255, 255, 0.66);
  border: 1px solid var(--line-light);
  border-radius: 2px;
  font-size: 11px;
  text-align: center;
}

.product-section {
  background: #eef2f3;
}

.product-heading > p,
.process-heading > p {
  color: #677177;
}

.product-stage {
  overflow: hidden;
  color: var(--white);
  background: #0a0e12;
  border: 1px solid rgba(8, 11, 14, 0.18);
  border-radius: var(--radius);
  box-shadow: 0 34px 72px rgba(10, 20, 27, 0.18);
}

.product-toolbar {
  display: grid;
  grid-template-columns: 1fr auto 1fr;
  align-items: center;
  min-height: 68px;
  padding: 0 24px;
  border-bottom: 1px solid rgba(255, 255, 255, 0.12);
}

.product-title {
  display: flex;
  align-items: center;
  gap: 9px;
}

.product-title strong {
  font-size: 13px;
  font-weight: 560;
}

.live-dot {
  width: 7px;
  height: 7px;
  background: var(--mint);
  border-radius: 50%;
  box-shadow: 0 0 0 5px rgba(38, 213, 197, 0.12);
}

.product-tabs,
.case-controls {
  display: inline-flex;
  padding: 4px;
  background: rgba(255, 255, 255, 0.07);
  border: 1px solid rgba(255, 255, 255, 0.1);
  border-radius: 4px;
}

.product-tabs button,
.case-controls button {
  min-height: 34px;
  padding: 0 16px;
  color: rgba(255, 255, 255, 0.52);
  background: transparent;
  border-radius: 2px;
  font-size: 12px;
  cursor: pointer;
}

.product-tabs button[aria-selected="true"],
.case-controls button.is-active {
  color: var(--ink);
  background: var(--mint);
}

.product-status {
  justify-self: end;
  color: rgba(255, 255, 255, 0.34);
  font-size: 9px;
}

.product-viewport {
  position: relative;
  width: 100%;
  aspect-ratio: 1919 / 885;
  overflow: hidden;
  background: #e9edf1;
}

.product-viewport img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: top left;
  opacity: 1;
  transition: opacity 180ms ease, transform 360ms ease;
}

.product-viewport img.is-switching {
  opacity: 0;
  transform: scale(0.995);
}

.product-caption {
  display: grid;
  grid-template-columns: 1fr minmax(300px, 0.7fr);
  gap: 60px;
  align-items: end;
  padding: 28px 32px 32px;
}

.product-caption span {
  color: var(--mint);
  font-size: 10px;
}

.product-caption h3 {
  margin: 6px 0 0;
  font-size: 24px;
  font-weight: 560;
}

.product-caption p {
  margin: 0;
  color: rgba(255, 255, 255, 0.5);
  font-size: 13px;
}

.case-section {
  color: var(--white);
  background: #111b1d;
}

.case-heading {
  margin-bottom: 34px;
}

.case-controls {
  margin-bottom: 28px;
}

.case-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  border-top: 1px solid var(--line-light);
  border-left: 1px solid var(--line-light);
}

.case-subheading {
  display: flex;
  align-items: end;
  justify-content: space-between;
  gap: 28px;
  margin-top: 64px;
  margin-bottom: 22px;
  padding-top: 28px;
  border-top: 1px solid var(--line-light);
}

.case-subheading div {
  display: grid;
}

.case-subheading span {
  color: var(--mint);
  font-size: 9px;
  font-weight: 700;
}

.case-subheading strong {
  margin-top: 6px;
  font-size: 24px;
  font-weight: 580;
}

.case-subheading p {
  margin: 0;
  color: rgba(255, 255, 255, 0.42);
  font-size: 12px;
}

.scenario-grid .case-card {
  min-height: 250px;
}

.case-card {
  position: relative;
  display: flex;
  min-height: 270px;
  flex-direction: column;
  justify-content: flex-end;
  padding: 26px;
  border-right: 1px solid var(--line-light);
  border-bottom: 1px solid var(--line-light);
  overflow: hidden;
  transition: background-color 220ms ease;
}

.case-card::before {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  height: 3px;
  background: var(--mint);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform 220ms ease;
}

.case-card:hover {
  background: rgba(255, 255, 255, 0.045);
}

.case-card:hover::before {
  transform: scaleX(1);
}

.case-card.is-hidden {
  display: none;
}

.case-top {
  position: absolute;
  top: 22px;
  left: 26px;
  right: 26px;
  display: flex;
  justify-content: space-between;
  color: rgba(255, 255, 255, 0.36);
  font-size: 9px;
}

.case-card > svg {
  position: absolute;
  top: 74px;
  left: 26px;
  width: 40px;
  height: 40px;
  color: var(--mint);
  stroke-width: 1.3;
}

.case-card:nth-child(4n + 2) > svg {
  color: var(--blue);
}

.case-card:nth-child(4n + 3) > svg {
  color: var(--yellow);
}

.case-card:nth-child(4n) > svg {
  color: var(--coral);
}

.case-card h3 {
  margin: 0;
  font-size: 19px;
  font-weight: 560;
  line-height: 1.45;
}

.case-card p {
  margin: 10px 0 0;
  color: rgba(255, 255, 255, 0.44);
  font-size: 12px;
}

.about-section {
  background: var(--paper);
}

.about-media {
  position: relative;
  height: 520px;
  overflow: hidden;
  background: #17191a;
}

.about-media > img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: 44% center;
  filter: brightness(0.58) saturate(0.7);
}

.about-statement {
  position: absolute;
  left: max(32px, calc((100vw - var(--shell)) / 2));
  bottom: 64px;
  color: var(--white);
}

.about-statement span {
  color: var(--mint);
  font-size: 11px;
  font-weight: 700;
}

.about-statement strong {
  display: block;
  margin-top: 16px;
  font-size: 42px;
  font-weight: 560;
  line-height: 1.3;
}

.about-content {
  display: grid;
  grid-template-columns: 0.9fr 1.1fr;
  gap: 100px;
  padding-top: 106px;
  padding-bottom: 116px;
}

.about-copy p {
  margin: 28px 0 0;
  color: #657077;
  font-size: 15px;
}

.values-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  border-top: 1px solid var(--line);
  border-left: 1px solid var(--line);
}

.value {
  min-height: 205px;
  padding: 28px;
  border-right: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}

.value span {
  color: var(--mint);
  font-size: 10px;
  font-weight: 700;
}

.value h3 {
  margin: 30px 0 8px;
  font-size: 20px;
  font-weight: 620;
}

.value p {
  margin: 0;
  color: #6f797e;
  font-size: 13px;
}

.process-section {
  background: #e6ebec;
  border-top: 1px solid var(--line);
}

.process-list {
  display: grid;
  grid-template-columns: repeat(6, 1fr);
  margin: 0;
  padding: 0;
  border-top: 1px solid var(--line);
  border-left: 1px solid var(--line);
  list-style: none;
}

.process-list li {
  position: relative;
  min-height: 270px;
  padding: 24px 22px;
  border-right: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}

.process-list li > span {
  color: #8b959a;
  font-size: 10px;
}

.process-list svg {
  display: block;
  width: 32px;
  height: 32px;
  margin-top: 52px;
  color: #1d7c75;
  stroke-width: 1.4;
}

.process-list h3 {
  margin: 20px 0 8px;
  font-size: 17px;
  font-weight: 620;
}

.process-list p {
  margin: 0;
  color: #727d82;
  font-size: 12px;
}

.cooperation-section {
  padding: 126px 0;
  color: var(--white);
  background: #070a0d;
}

.cooperation-grid {
  display: grid;
  grid-template-columns: minmax(340px, 0.8fr) minmax(520px, 1.2fr);
  gap: 110px;
  align-items: start;
}

.cooperation-intro > p {
  max-width: 520px;
  margin: 28px 0 0;
  color: rgba(255, 255, 255, 0.5);
  font-size: 14px;
}

.contact-channel {
  display: flex;
  align-items: center;
  gap: 24px;
  margin-top: 46px;
  padding-top: 30px;
  border-top: 1px solid var(--line-light);
}

.qr-frame {
  position: relative;
  width: 176px;
  height: 176px;
  flex: 0 0 176px;
  padding: 10px;
  overflow: hidden;
  background: var(--white);
  border-radius: 4px;
}

.qr-frame > img:first-child {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: contain;
}

.contact-channel > div:last-child {
  display: grid;
}

.contact-channel span {
  color: var(--mint);
  font-size: 11px;
}

.contact-channel strong {
  margin-top: 6px;
  font-size: 17px;
  font-weight: 560;
}

.contact-channel small {
  margin-top: 4px;
  color: rgba(255, 255, 255, 0.34);
  font-size: 10px;
}

.location-line {
  display: flex;
  align-items: center;
  gap: 9px;
  margin-top: 26px;
  color: rgba(255, 255, 255, 0.5);
  font-size: 12px;
}

.location-line svg {
  width: 16px;
  height: 16px;
  color: var(--mint);
}

.location-line em {
  margin-left: auto;
  font-style: normal;
}

.project-form {
  display: grid;
  gap: 24px;
  padding: 40px;
  background: #11161a;
  border: 1px solid var(--line-light);
  border-radius: var(--radius);
}

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

.project-form > label,
.form-row > label {
  display: grid;
  gap: 9px;
}

.project-form label > span {
  color: rgba(255, 255, 255, 0.58);
  font-size: 12px;
}

.project-form input,
.project-form select,
.project-form textarea {
  width: 100%;
  border: 1px solid rgba(255, 255, 255, 0.15);
  border-radius: 3px;
  outline: 0;
  background: #0a0e11;
  transition: border-color 160ms ease, box-shadow 160ms ease;
}

.project-form input,
.project-form select {
  height: 48px;
  padding: 0 14px;
}

.project-form textarea {
  min-height: 128px;
  padding: 13px 14px;
  resize: vertical;
}

.project-form input:focus,
.project-form select:focus,
.project-form textarea:focus {
  border-color: var(--mint);
  box-shadow: 0 0 0 3px rgba(38, 213, 197, 0.1);
}

.project-form input::placeholder,
.project-form textarea::placeholder {
  color: rgba(255, 255, 255, 0.28);
}

.radio-group {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 8px;
}

.radio-group label {
  position: relative;
  cursor: pointer;
}

.radio-group input {
  position: absolute;
  width: 1px;
  height: 1px;
  opacity: 0;
}

.radio-group span {
  display: grid;
  min-height: 42px;
  place-items: center;
  padding: 0 8px;
  color: rgba(255, 255, 255, 0.5);
  border: 1px solid rgba(255, 255, 255, 0.15);
  border-radius: 3px;
  font-size: 11px;
  text-align: center;
}

.radio-group input:checked + span {
  color: var(--ink);
  background: var(--mint);
  border-color: var(--mint);
}

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

.site-footer {
  color: var(--white);
  background: #070a0d;
  border-top: 1px solid var(--line-light);
}

.footer-main,
.footer-bottom {
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.footer-main {
  min-height: 128px;
}

.footer-brand {
  display: flex;
  align-items: center;
  gap: 14px;
}

.footer-brand img {
  width: 50px;
  height: 32px;
  object-fit: contain;
}

.footer-brand div {
  display: grid;
}

.footer-brand strong {
  font-size: 17px;
}

.footer-brand span {
  color: rgba(255, 255, 255, 0.38);
  font-size: 10px;
}

.footer-links {
  display: flex;
  gap: 30px;
  color: rgba(255, 255, 255, 0.52);
  font-size: 12px;
}

.footer-links a:hover {
  color: var(--mint);
}

.footer-bottom {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto minmax(0, 1fr);
  min-height: 64px;
  color: rgba(255, 255, 255, 0.3);
  border-top: 1px solid rgba(255, 255, 255, 0.08);
  font-size: 10px;
}

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

.beian-link {
  justify-self: center;
  color: inherit;
  text-decoration: none;
  transition: color 180ms ease;
}

.beian-link:hover,
.beian-link:focus-visible {
  color: var(--mint);
}

.brief-dialog {
  width: min(620px, calc(100% - 32px));
  max-height: calc(100svh - 48px);
  padding: 40px;
  color: var(--ink);
  background: var(--paper);
  border: 0;
  border-radius: var(--radius);
  box-shadow: 0 28px 90px rgba(0, 0, 0, 0.46);
}

.brief-dialog::backdrop {
  background: rgba(2, 5, 7, 0.78);
  backdrop-filter: blur(8px);
}

.brief-dialog .dialog-close {
  position: absolute;
  top: 18px;
  right: 18px;
  width: 38px;
  height: 38px;
}

.brief-dialog h2 {
  margin: 0;
  font-size: 30px;
}

.brief-dialog pre {
  max-height: 320px;
  margin: 24px 0;
  padding: 18px;
  overflow: auto;
  white-space: pre-wrap;
  color: #2c353a;
  background: #e7ecec;
  border: 1px solid var(--line);
  border-radius: 3px;
  font-family: inherit;
  font-size: 13px;
  line-height: 1.8;
}

.dialog-actions {
  display: flex;
  gap: 10px;
}

.toast {
  position: fixed;
  left: 50%;
  bottom: 28px;
  z-index: 120;
  padding: 11px 18px;
  color: var(--ink);
  background: var(--mint);
  border-radius: 3px;
  font-size: 12px;
  font-weight: 650;
  opacity: 0;
  pointer-events: none;
  transform: translate(-50%, 12px);
  transition: opacity 180ms ease, transform 180ms ease;
}

.toast.is-visible {
  opacity: 1;
  transform: translate(-50%, 0);
}

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

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

@keyframes signal {
  0% { box-shadow: 0 0 0 0 rgba(38, 213, 197, 0.4); }
  65% { box-shadow: 0 0 0 9px rgba(38, 213, 197, 0); }
  100% { box-shadow: 0 0 0 0 rgba(38, 213, 197, 0); }
}

@media (max-width: 1100px) {
  .site-header {
    grid-template-columns: 1fr auto;
  }

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

  .menu-toggle {
    display: inline-grid;
    justify-self: end;
  }

  .mobile-nav {
    position: absolute;
    top: 68px;
    left: 0;
    right: 0;
    display: grid;
    padding: 22px 32px 30px;
    background: #080b0e;
    border-bottom: 1px solid var(--line-light);
    opacity: 0;
    pointer-events: none;
    transform: translateY(-12px);
    transition: opacity 180ms ease, transform 180ms ease;
  }

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

  .mobile-nav a {
    padding: 13px 0;
    color: rgba(255, 255, 255, 0.75);
    border-bottom: 1px solid rgba(255, 255, 255, 0.09);
  }

  .hero h1 {
    font-size: 46px;
  }

  .hero-signal {
    display: none;
  }

  .hero-copy {
    width: 100%;
  }

  .business-item {
    grid-template-columns: 42px 50px 1fr;
  }

  .business-tags {
    grid-column: 3;
    justify-content: flex-start;
  }

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

  .about-content {
    gap: 60px;
  }

  .process-list {
    grid-template-columns: repeat(3, 1fr);
  }

  .cooperation-grid {
    gap: 64px;
  }
}

@media (max-width: 820px) {
  .shell {
    width: min(calc(100% - 40px), var(--shell));
  }

  .site-header {
    height: 68px;
    padding: 0 20px;
  }

  .hero {
    height: calc(100svh - 32px);
    min-height: 660px;
  }

  .hero-grid {
    width: calc(100% - 40px);
  }

  .hero-content {
    padding-bottom: 86px;
  }

  .hero-copy {
    width: 100%;
  }

  .hero h1 {
    max-width: none;
    font-size: 40px;
  }

  .hero-lead {
    font-size: 22px;
  }

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

  .fact:nth-child(3) {
    border-top: 1px solid var(--line-light);
  }

  .fact:nth-child(4) {
    border-top: 1px solid var(--line-light);
  }

  .section {
    padding: 92px 0;
  }

  .section-heading {
    grid-template-columns: 1fr;
    gap: 28px;
    margin-bottom: 50px;
  }

  .section-heading h2,
  .about-copy h2,
  .cooperation-intro h2 {
    font-size: 38px;
  }

  .product-toolbar {
    grid-template-columns: 1fr auto;
  }

  .product-status {
    display: none;
  }

  .product-caption {
    grid-template-columns: 1fr;
    gap: 18px;
  }

  .about-content,
  .cooperation-grid {
    grid-template-columns: 1fr;
  }

  .about-content {
    gap: 52px;
  }

  .cooperation-grid {
    gap: 54px;
  }
}

@media (max-width: 600px) {
  .shell {
    width: calc(100% - 28px);
  }

  .brand-copy strong {
    font-size: 16px;
  }

  .brand-copy small {
    display: none;
  }

  .hero {
    min-height: 700px;
  }

  .hero-media {
    object-position: 62% center;
  }

  .hero-grid {
    width: calc(100% - 28px);
  }

  .hero-grid::before {
    left: 50%;
  }

  .hero-grid::after {
    display: none;
  }

  .hero-content {
    padding-bottom: 76px;
  }

  .eyebrow {
    align-items: flex-start;
    flex-direction: column;
    gap: 5px;
  }

  .eyebrow span + span {
    padding-left: 0;
  }

  .eyebrow span + span::before {
    display: none;
  }

  .hero h1 {
    font-size: 22px;
    line-height: 1.22;
  }

  .hero-lead {
    margin-top: 20px;
    font-size: 19px;
  }

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

  .hero-actions {
    align-items: stretch;
    flex-direction: column;
    width: min(100%, 300px);
    margin-top: 28px;
  }

  .scroll-cue {
    right: 8px;
  }

  .fact {
    min-height: 126px;
    padding: 22px 16px;
  }

  .fact strong {
    font-size: 30px;
  }

  .section {
    padding: 78px 0;
  }

  .section-heading h2,
  .about-copy h2,
  .cooperation-intro h2 {
    font-size: 32px;
  }

  .business-item {
    grid-template-columns: 38px 1fr;
    gap: 16px;
    padding: 26px 0;
  }

  .business-item:hover {
    padding-left: 8px;
  }

  .business-icon {
    grid-column: 1;
    grid-row: 2;
    width: 38px;
    height: 38px;
  }

  .business-icon svg {
    width: 18px;
    height: 18px;
  }

  .business-main {
    grid-column: 2;
    grid-row: 1 / span 2;
  }

  .business-main h3 {
    font-size: 20px;
  }

  .business-tags {
    grid-column: 2;
    gap: 5px;
  }

  .business-tags li {
    min-width: auto;
  }

  .product-stage {
    width: calc(100% + 28px);
    margin-left: -14px;
    border-inline: 0;
    border-radius: 0;
  }

  .product-toolbar {
    grid-template-columns: 1fr;
    gap: 12px;
    padding: 14px;
  }

  .product-tabs {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
  }

  .product-tabs button {
    padding: 0 7px;
  }

  .product-viewport {
    aspect-ratio: 16 / 9;
  }

  .product-caption {
    padding: 22px 18px 26px;
  }

  .product-caption h3 {
    font-size: 20px;
  }

  .case-controls {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    width: 100%;
  }

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

  .case-subheading {
    align-items: flex-start;
    flex-direction: column;
    gap: 8px;
    margin-top: 48px;
  }

  .case-card {
    min-height: 240px;
  }

  .about-media {
    height: 440px;
  }

  .about-statement {
    left: 20px;
    bottom: 40px;
  }

  .about-statement strong {
    font-size: 32px;
  }

  .about-content {
    padding-top: 74px;
    padding-bottom: 80px;
  }

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

  .value {
    min-height: 174px;
  }

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

  .process-list li {
    min-height: 230px;
    padding: 20px 16px;
  }

  .process-list svg {
    margin-top: 34px;
  }

  .cooperation-section {
    padding: 84px 0;
  }

  .contact-channel {
    align-items: flex-start;
  }

  .qr-frame {
    width: 148px;
    height: 148px;
    flex-basis: 148px;
  }

  .location-line {
    flex-wrap: wrap;
  }

  .location-line em {
    width: 100%;
    margin-left: 25px;
  }

  .project-form {
    gap: 20px;
    padding: 24px 18px;
  }

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

  .radio-group {
    grid-template-columns: 1fr;
  }

  .footer-main,
  .footer-bottom {
    align-items: flex-start;
    flex-direction: column;
  }

  .footer-main {
    gap: 28px;
    padding-top: 34px;
    padding-bottom: 34px;
  }

  .footer-links {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    width: 100%;
    gap: 12px 28px;
  }

  .footer-bottom {
    display: flex;
    min-height: 92px;
    justify-content: center;
    gap: 4px;
  }

  .footer-bottom .beian-link {
    align-self: center;
  }

  .brief-dialog {
    padding: 34px 20px 22px;
  }

  .dialog-actions {
    align-items: stretch;
    flex-direction: column;
  }
}

@media (min-width: 360px) and (max-width: 600px) {
  .hero h1 {
    font-size: 24px;
  }
}

@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;
  }

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