:root {
  --navy-950: #05111f;
  --navy-900: #071526;
  --navy-800: #0c2037;
  --navy-700: #12375c;
  --cyan-500: #22b6d7;
  --cyan-300: #75dcf0;
  --steel-100: #f3f7fa;
  --steel-200: #dce7ee;
  --steel-500: #7f94a6;
  --ink: #172437;
  --muted: #607181;
  --white: #ffffff;
  --line: rgba(127, 148, 166, 0.24);
  --shadow: 0 24px 70px rgba(5, 17, 31, 0.14);
  --max: 1360px;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  color: var(--ink);
  font-family:
    "Inter", "PingFang SC", "Microsoft YaHei", "Noto Sans CJK SC", system-ui,
    sans-serif;
  background: var(--white);
  line-height: 1.65;
}

img {
  display: block;
  width: 100%;
  height: auto;
}

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

.site-header {
  position: fixed;
  inset: 0 0 auto;
  z-index: 20;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  padding: 18px clamp(20px, 5vw, 64px);
  color: var(--white);
  transition:
    background 180ms ease,
    box-shadow 180ms ease,
    padding 180ms ease;
}

.site-header.is-solid {
  padding-block: 12px;
  background: rgba(5, 17, 31, 0.92);
  box-shadow: 0 10px 30px rgba(5, 17, 31, 0.22);
  backdrop-filter: blur(16px);
}

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

.brand-mark {
  display: grid;
  width: 42px;
  height: 42px;
  place-items: center;
  border: 1px solid rgba(255, 255, 255, 0.36);
  background: linear-gradient(135deg, rgba(34, 182, 215, 0.88), rgba(255, 255, 255, 0.1));
  border-radius: 8px;
  color: var(--white);
  font-size: 15px;
  font-weight: 800;
  letter-spacing: 0;
}

.brand strong,
.brand em {
  display: block;
  white-space: nowrap;
}

.brand strong {
  font-size: 17px;
  letter-spacing: 0;
}

.brand em {
  color: rgba(255, 255, 255, 0.68);
  font-size: 11px;
  font-style: normal;
  letter-spacing: 0.12em;
}

.nav {
  display: flex;
  align-items: center;
  gap: 24px;
  color: rgba(255, 255, 255, 0.82);
  font-size: 14px;
}

.nav a {
  transition: color 160ms ease;
}

.nav a:hover {
  color: var(--white);
}

.nav-cta {
  padding: 9px 15px;
  border: 1px solid rgba(255, 255, 255, 0.28);
  border-radius: 8px;
}

.nav-toggle {
  display: none;
  width: 42px;
  height: 42px;
  padding: 0;
  border: 1px solid rgba(255, 255, 255, 0.3);
  background: rgba(255, 255, 255, 0.08);
  border-radius: 8px;
}

.nav-toggle span {
  display: block;
  width: 18px;
  height: 2px;
  margin: 5px auto;
  background: var(--white);
}

.hero {
  position: relative;
  min-height: 100vh;
  overflow: hidden;
  color: var(--white);
  background: var(--navy-950);
}

.hero-slides,
.hero-image {
  position: absolute;
  inset: 0;
}

.hero-image {
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center right;
  opacity: 0;
  transform: scale(1.02);
  transition:
    opacity 700ms ease,
    transform 1500ms ease;
}

.hero-image.is-active {
  opacity: 1;
  transform: scale(1);
}

.hero-shade {
  position: absolute;
  inset: 0;
  background:
    linear-gradient(90deg, rgba(5, 17, 31, 0.98) 0%, rgba(5, 17, 31, 0.82) 38%, rgba(5, 17, 31, 0.16) 78%),
    linear-gradient(180deg, rgba(5, 17, 31, 0.54) 0%, rgba(5, 17, 31, 0.08) 48%, rgba(5, 17, 31, 0.72) 100%);
}

.hero-content {
  position: relative;
  z-index: 1;
  width: min(var(--max), calc(100% - 40px));
  min-height: 100vh;
  margin: 0 auto;
  padding: 138px 0 72px;
  display: flex;
  flex-direction: column;
  justify-content: center;
}

.eyebrow,
.section-kicker {
  margin: 0 0 14px;
  color: var(--cyan-300);
  font-size: 12px;
  font-weight: 800;
  letter-spacing: 0.16em;
  text-transform: uppercase;
}

.hero h1 {
  max-width: 860px;
  margin: 0;
  font-size: clamp(48px, 6.6vw, 88px);
  line-height: 1.04;
  letter-spacing: 0;
}

.hero-lead {
  max-width: 720px;
  margin: 28px 0 0;
  color: rgba(255, 255, 255, 0.84);
  font-size: clamp(18px, 2vw, 23px);
}

.hero-badges {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  max-width: 820px;
  margin-top: 28px;
}

.hero-badges span {
  padding: 9px 13px;
  border: 1px solid rgba(117, 220, 240, 0.28);
  border-radius: 8px;
  background: rgba(5, 17, 31, 0.36);
  color: rgba(255, 255, 255, 0.84);
  font-size: 13px;
  font-weight: 800;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  margin-top: 38px;
}

.hero-dots {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-top: 28px;
}

.hero-dots button {
  width: 34px;
  height: 4px;
  padding: 0;
  border: 0;
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.32);
  cursor: pointer;
  transition:
    width 180ms ease,
    background 180ms ease;
}

.hero-dots button.is-active {
  width: 54px;
  background: var(--cyan-500);
}

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 48px;
  padding: 12px 20px;
  border-radius: 8px;
  font-weight: 800;
  transition:
    transform 160ms ease,
    border-color 160ms ease,
    background 160ms ease;
}

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

.button.primary {
  background: var(--cyan-500);
  color: var(--navy-950);
}

.button.ghost {
  border: 1px solid rgba(255, 255, 255, 0.34);
  color: var(--white);
}

.hero-metrics {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 1px;
  width: min(900px, 100%);
  margin-top: 46px;
  overflow: hidden;
  border: 1px solid rgba(255, 255, 255, 0.18);
  border-radius: 8px;
  background: rgba(255, 255, 255, 0.08);
  backdrop-filter: blur(14px);
}

.hero-metrics span {
  padding: 19px 20px;
  background: rgba(5, 17, 31, 0.32);
  color: rgba(255, 255, 255, 0.86);
  font-size: 14px;
  font-weight: 700;
  text-align: center;
}

.section {
  padding: clamp(82px, 10vw, 124px) clamp(20px, 5vw, 64px);
}

.section > * {
  width: min(var(--max), 100%);
  margin-inline: auto;
}

.intro-grid {
  display: grid;
  grid-template-columns: minmax(0, 0.95fr) minmax(0, 1.05fr);
  gap: clamp(32px, 6vw, 78px);
  align-items: start;
}

h2 {
  margin: 0;
  color: var(--navy-900);
  font-size: clamp(30px, 4vw, 48px);
  line-height: 1.18;
  letter-spacing: 0;
}

h3 {
  margin: 0;
  color: var(--navy-900);
  font-size: 20px;
  line-height: 1.35;
}

p {
  margin: 0;
}

.intro-copy {
  display: grid;
  gap: 18px;
  color: var(--muted);
  font-size: 17px;
}

.band {
  background:
    linear-gradient(180deg, var(--steel-100), #ffffff 70%),
    var(--steel-100);
}

.section-heading {
  display: grid;
  gap: 14px;
  max-width: 900px;
  margin: 0 auto 42px;
  text-align: center;
}

.section-heading.align-left {
  margin-inline: 0 auto;
  text-align: left;
}

.section-heading p:last-child {
  color: var(--muted);
  font-size: 17px;
}

.business-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 20px;
}

.business-card {
  min-height: 300px;
  padding: 30px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: rgba(255, 255, 255, 0.92);
  box-shadow: 0 18px 44px rgba(5, 17, 31, 0.08);
}

.card-index {
  display: block;
  margin-bottom: 28px;
  color: var(--cyan-500);
  font-size: 13px;
  font-weight: 900;
}

.business-card p {
  margin-top: 16px;
  color: var(--muted);
  font-size: 15px;
}

.card-tags,
.scope-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.card-tags {
  margin-top: 22px;
}

.card-tags span,
.scope-tags span {
  padding: 6px 10px;
  border: 1px solid rgba(34, 182, 215, 0.18);
  border-radius: 8px;
  background: rgba(34, 182, 215, 0.08);
  color: var(--navy-700);
  font-size: 12px;
  font-weight: 800;
}

.capability {
  background:
    radial-gradient(circle at 78% 18%, rgba(34, 182, 215, 0.12), transparent 32%),
    var(--white);
}

.capability-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 1px;
  overflow: hidden;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--line);
  box-shadow: var(--shadow);
}

.capability-grid article {
  min-height: 260px;
  padding: 30px;
  background: var(--white);
}

.capability-grid span,
.process-steps span {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 38px;
  height: 38px;
  margin-bottom: 28px;
  border-radius: 8px;
  background: rgba(34, 182, 215, 0.1);
  color: var(--cyan-500);
  font-weight: 900;
}

.capability-grid p {
  margin-top: 14px;
  color: var(--muted);
  font-size: 15px;
}

.split {
  display: grid;
  grid-template-columns: minmax(0, 1.12fr) minmax(0, 0.88fr);
  gap: clamp(30px, 5vw, 64px);
  align-items: center;
}

.split > * {
  width: auto;
  margin: 0;
}

.split-media,
.application-image {
  overflow: hidden;
  border-radius: 8px;
  box-shadow: var(--shadow);
}

.split-media img {
  aspect-ratio: 16 / 10;
  height: 100%;
  object-fit: cover;
}

.split-content {
  display: grid;
  gap: 22px;
}

.split-content p:not(.section-kicker) {
  color: var(--muted);
  font-size: 17px;
}

.check-list {
  display: grid;
  gap: 12px;
  margin: 8px 0 0;
  padding: 0;
  list-style: none;
}

.check-list li {
  position: relative;
  padding-left: 28px;
  color: var(--ink);
  font-weight: 700;
}

.check-list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.74em;
  width: 10px;
  height: 10px;
  border: 2px solid var(--cyan-500);
  border-radius: 50%;
}

.process {
  background:
    linear-gradient(180deg, var(--steel-100), #ffffff 72%),
    var(--steel-100);
}

.process-steps {
  position: relative;
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 20px;
}

.process-steps::before {
  content: "";
  position: absolute;
  left: 8%;
  right: 8%;
  top: 49px;
  height: 1px;
  background: linear-gradient(90deg, rgba(34, 182, 215, 0), rgba(34, 182, 215, 0.55), rgba(34, 182, 215, 0));
}

.process-steps article {
  position: relative;
  padding: 28px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: rgba(255, 255, 255, 0.92);
  box-shadow: 0 14px 36px rgba(5, 17, 31, 0.06);
}

.process-steps p {
  margin-top: 12px;
  color: var(--muted);
  font-size: 15px;
}

.applications {
  background: var(--navy-950);
  color: var(--white);
}

.applications h2,
.applications h3 {
  color: var(--white);
}

.applications .section-heading p:last-child,
.application-list p {
  color: rgba(255, 255, 255, 0.68);
}

.application-layout {
  display: grid;
  grid-template-columns: minmax(0, 1.15fr) minmax(320px, 0.85fr);
  gap: 22px;
  align-items: stretch;
}

.application-image img {
  height: 100%;
  min-height: 420px;
  object-fit: cover;
}

.application-list {
  display: grid;
  gap: 14px;
}

.application-list article {
  padding: 26px;
  border: 1px solid rgba(255, 255, 255, 0.12);
  border-radius: 8px;
  background: rgba(255, 255, 255, 0.06);
}

.application-list p {
  margin-top: 12px;
}

.scope {
  background:
    linear-gradient(135deg, rgba(34, 182, 215, 0.1), rgba(255, 255, 255, 0) 45%),
    var(--steel-100);
}

.scope-panel {
  padding: clamp(30px, 5vw, 54px);
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--white);
  box-shadow: 0 16px 54px rgba(5, 17, 31, 0.08);
}

.scope-tags {
  margin-top: 24px;
}

.scope-text {
  margin-top: 26px;
  color: var(--muted);
  font-size: 17px;
}

.contact {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 390px;
  gap: clamp(28px, 6vw, 84px);
  align-items: center;
  background: var(--white);
}

.contact > * {
  width: auto;
  margin: 0;
}

.contact-copy {
  max-width: 720px;
}

.contact-copy p:last-child {
  margin-top: 20px;
  color: var(--muted);
  font-size: 17px;
}

.contact-card {
  display: grid;
  gap: 12px;
  padding: 28px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: linear-gradient(160deg, var(--navy-900), var(--navy-700));
  color: var(--white);
}

.contact-card span {
  color: var(--cyan-300);
  font-size: 12px;
  font-weight: 900;
  letter-spacing: 0.16em;
  text-transform: uppercase;
}

.contact-card strong {
  font-size: 22px;
  line-height: 1.35;
}

.contact-list {
  display: grid;
  gap: 12px;
  margin: 10px 0 0;
}

.contact-list div {
  display: grid;
  grid-template-columns: 48px minmax(0, 1fr);
  gap: 12px;
  padding-top: 12px;
  border-top: 1px solid rgba(255, 255, 255, 0.14);
}

.contact-list dt,
.contact-list dd {
  margin: 0;
}

.contact-list dt {
  color: rgba(117, 220, 240, 0.92);
  font-weight: 800;
}

.contact-list dd {
  color: rgba(255, 255, 255, 0.82);
}

.contact-card a {
  margin-top: 14px;
  color: rgba(255, 255, 255, 0.78);
  font-weight: 700;
}

.footer {
  display: flex;
  justify-content: space-between;
  gap: 20px;
  padding: 28px clamp(20px, 5vw, 64px);
  background: var(--navy-950);
  color: rgba(255, 255, 255, 0.58);
  font-size: 14px;
}

@media (max-width: 980px) {
  .nav-toggle {
    display: block;
  }

  .nav {
    position: absolute;
    inset: 72px 20px auto;
    display: none;
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    padding: 12px;
    border: 1px solid rgba(255, 255, 255, 0.14);
    border-radius: 8px;
    background: rgba(5, 17, 31, 0.96);
    box-shadow: 0 18px 46px rgba(5, 17, 31, 0.32);
  }

  .nav.is-open {
    display: flex;
  }

  .nav a {
    padding: 13px 12px;
  }

  .nav-cta {
    border-color: rgba(255, 255, 255, 0.18);
  }

  .hero-shade {
    background:
      linear-gradient(90deg, rgba(5, 17, 31, 0.94), rgba(5, 17, 31, 0.54)),
      linear-gradient(180deg, rgba(5, 17, 31, 0.5), rgba(5, 17, 31, 0.78));
  }

  .hero-metrics,
  .business-grid,
  .capability-grid,
  .process-steps {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .process-steps::before {
    display: none;
  }

  .intro-grid,
  .split,
  .application-layout,
  .contact {
    grid-template-columns: 1fr;
  }

  .business-card {
    min-height: 250px;
  }

  .application-image img {
    min-height: 320px;
  }
}

@media (min-width: 1600px) {
  :root {
    --max: 1560px;
  }

  .site-header {
    padding: 24px clamp(72px, 5.5vw, 140px);
  }

  .site-header.is-solid {
    padding-block: 16px;
  }

  .brand-mark {
    width: 48px;
    height: 48px;
    font-size: 17px;
  }

  .brand strong {
    font-size: 19px;
  }

  .brand em {
    font-size: 12px;
  }

  .nav {
    gap: 34px;
    font-size: 15px;
  }

  .nav-cta {
    padding: 11px 18px;
  }

  .hero-content {
    padding-top: 150px;
  }

  .hero h1 {
    max-width: 980px;
    font-size: clamp(76px, 5.1vw, 116px);
  }

  .hero-lead {
    max-width: 840px;
    font-size: 24px;
  }

  .hero-badges span {
    padding: 10px 15px;
    font-size: 14px;
  }

  .button {
    min-height: 54px;
    padding: 14px 24px;
    font-size: 16px;
  }

  .hero-metrics {
    width: min(1080px, 100%);
  }

  .hero-metrics span {
    padding: 22px 24px;
    font-size: 15px;
  }

  .section {
    padding-block: clamp(104px, 8vw, 150px);
  }

  .section-heading {
    max-width: 980px;
    margin-bottom: 54px;
  }

  h2 {
    font-size: clamp(42px, 2.8vw, 60px);
  }

  h3 {
    font-size: 22px;
  }

  .intro-copy,
  .section-heading p:last-child,
  .split-content p:not(.section-kicker),
  .scope-text,
  .contact-copy p:last-child {
    font-size: 18px;
  }

  .business-grid,
  .process-steps {
    gap: 24px;
  }

  .business-card {
    min-height: 320px;
    padding: 34px;
  }

  .capability-grid article {
    min-height: 280px;
    padding: 34px;
  }

  .split {
    gap: 86px;
  }

  .application-layout {
    grid-template-columns: minmax(0, 1.12fr) minmax(420px, 0.88fr);
    gap: 30px;
  }

  .application-image img {
    min-height: 480px;
  }

  .contact {
    grid-template-columns: minmax(0, 1fr) 430px;
  }
}

@media (min-width: 2200px) {
  :root {
    --max: 1720px;
  }

  .site-header {
    padding-inline: clamp(100px, 8vw, 210px);
  }

  .hero h1 {
    max-width: 1080px;
    font-size: 122px;
  }

  .hero-lead {
    max-width: 920px;
    font-size: 26px;
  }

  .hero-metrics {
    width: min(1180px, 100%);
  }
}

@media (max-width: 640px) {
  .site-header {
    padding: 12px 16px;
  }

  .brand-mark {
    width: 38px;
    height: 38px;
  }

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

  .brand em {
    font-size: 10px;
  }

  .hero-content {
    width: min(100% - 32px, var(--max));
    padding-top: 108px;
  }

  .hero h1 {
    font-size: 39px;
    line-height: 1.12;
  }

  .hero-lead {
    font-size: 16px;
  }

  .hero-badges {
    margin-top: 22px;
  }

  .hero-badges span {
    width: 100%;
    padding: 8px 11px;
    font-size: 12px;
  }

  .hero-actions {
    flex-direction: column;
  }

  .button {
    width: 100%;
  }

  .hero-dots {
    justify-content: center;
    margin-top: 22px;
  }

  .hero-metrics,
  .business-grid,
  .capability-grid,
  .process-steps {
    grid-template-columns: 1fr;
  }

  .hero-metrics {
    margin-top: 34px;
  }

  .section {
    padding: 68px 16px;
  }

  h2 {
    font-size: 29px;
  }

  .business-card,
  .capability-grid article,
  .process-steps article,
  .application-list article,
  .scope-panel,
  .contact-card {
    padding: 22px;
  }

  .business-card,
  .capability-grid article {
    min-height: auto;
  }

  .card-index,
  .capability-grid span,
  .process-steps span {
    margin-bottom: 18px;
  }

  .contact-list div {
    grid-template-columns: 42px minmax(0, 1fr);
  }

  .footer {
    flex-direction: column;
    padding: 24px 16px;
  }
}