:root {
  color-scheme: dark;
  --ink: #f4f7fb;
  --muted: #9cacbd;
  --muted-strong: #c5ced8;
  --navy-950: #030b14;
  --navy-900: #04101d;
  --navy-850: #061524;
  --navy-800: #071b30;
  --line: rgba(167, 193, 219, 0.2);
  --line-strong: rgba(167, 193, 219, 0.36);
  --blue: #1897ff;
  --teal: #50d4ce;
  --warm: #dcc5a3;
  --max-width: 1440px;
  --side: clamp(24px, 5vw, 78px);
  font-family: "Noto Sans SC", "PingFang SC", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
  background: var(--navy-950);
  color: var(--ink);
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
  scroll-padding-top: 88px;
}

body {
  margin: 0;
  min-width: 320px;
  min-height: 100vh;
  background: var(--navy-950);
  color: var(--ink);
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

a {
  color: inherit;
}

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

img {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.skip-link {
  position: fixed;
  z-index: 100;
  top: 12px;
  left: 12px;
  padding: 10px 14px;
  background: var(--ink);
  color: var(--navy-950);
  transform: translateY(-160%);
}

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

.site-header {
  position: fixed;
  z-index: 50;
  inset: 0 0 auto;
  min-height: 88px;
  padding: 0 var(--side);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 36px;
  background: rgba(3, 11, 20, 0.94);
  border-bottom: 1px solid var(--line);
  backdrop-filter: blur(16px);
}

.brand {
  display: flex;
  flex-direction: column;
  gap: 3px;
  text-decoration: none;
  white-space: nowrap;
}

.brand strong {
  font-size: 17px;
  letter-spacing: 0.06em;
  font-weight: 620;
}

.brand span {
  color: var(--muted);
  font-size: 10px;
  letter-spacing: 0.13em;
}

.site-nav {
  display: flex;
  align-items: stretch;
  align-self: stretch;
  gap: clamp(20px, 3vw, 52px);
}

.site-nav a {
  position: relative;
  min-width: 48px;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 2px;
  text-decoration: none;
  color: var(--muted-strong);
  transition: color 180ms ease;
}

.site-nav a::after {
  content: "";
  position: absolute;
  bottom: -1px;
  left: 50%;
  width: 0;
  height: 2px;
  background: var(--blue);
  transform: translateX(-50%);
  transition: width 180ms ease;
}

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

.site-nav a:hover::after,
.site-nav a:focus-visible::after,
.site-nav a.active::after {
  width: 28px;
}

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

.site-nav small {
  color: var(--muted);
  font-size: 9px;
}

.menu-button {
  display: none;
}

main {
  max-width: var(--max-width);
  margin: 0 auto;
  border-inline: 1px solid var(--line);
}

.hero {
  min-height: 700px;
  padding-top: 88px;
  display: grid;
  grid-template-columns: 41% 59%;
  background: var(--navy-900);
  border-bottom: 1px solid var(--line);
}

.hero-copy {
  position: relative;
  z-index: 2;
  padding: clamp(80px, 8vw, 118px) clamp(36px, 5vw, 72px) 56px var(--side);
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  border-right: 1px solid var(--line-strong);
}

.eyebrow {
  margin: 0 0 24px;
  color: var(--blue);
  font-size: 11px;
  font-weight: 650;
  letter-spacing: 0.2em;
}

.eyebrow.warm {
  color: var(--warm);
}

.hero h1 {
  margin: 0;
  font-size: clamp(44px, 4.2vw, 68px);
  line-height: 1.24;
  letter-spacing: 0.025em;
  font-weight: 570;
}

.accent-line {
  width: 34px;
  height: 3px;
  margin: 30px 0;
  background: var(--blue);
}

.hero-en {
  margin: 0 0 44px;
  color: var(--muted-strong);
  font-size: clamp(18px, 1.7vw, 24px);
  line-height: 1.35;
  font-weight: 300;
}

.hero-summary {
  margin: 0 0 12px;
  color: var(--muted-strong);
  font-size: 15px;
  line-height: 1.9;
}

.hero-summary.en {
  max-width: 420px;
  margin-bottom: 34px;
  color: var(--muted);
  font-size: 13px;
  line-height: 1.7;
}

.text-link {
  display: inline-flex;
  gap: 8px;
  padding: 10px 0;
  border-bottom: 1px solid var(--blue);
  color: var(--ink);
  text-decoration: none;
  font-size: 13px;
}

.text-link span {
  color: var(--muted);
}

.hero-visual {
  min-width: 0;
  overflow: hidden;
}

.hero-visual img {
  object-position: 57% center;
}

.services {
  padding: 56px var(--side) 64px;
  background: var(--navy-800);
  color: var(--ink);
}

.section-heading {
  display: flex;
  align-items: baseline;
  gap: 28px;
  margin-bottom: 38px;
}

.section-heading .eyebrow {
  margin: 0 auto 0 0;
  color: var(--blue);
}

.section-heading h2 {
  margin: 0;
  font-size: clamp(24px, 2.4vw, 34px);
  font-weight: 600;
}

.section-heading > p:last-child {
  margin: 0;
  color: var(--muted);
  font-size: 13px;
}

.service-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  border-top: 1px solid var(--line-strong);
  border-bottom: 1px solid var(--line-strong);
}

.service {
  position: relative;
  min-height: 256px;
  padding: 34px clamp(28px, 3vw, 48px) 32px;
}

.service + .service {
  border-left: 1px solid var(--line-strong);
}

.service-number {
  display: block;
  margin-bottom: 26px;
  color: var(--blue);
  font-size: 14px;
  font-weight: 650;
  letter-spacing: 0.12em;
}

.service h3 {
  margin: 0 0 4px;
  font-size: 21px;
  font-weight: 650;
}

.service p {
  margin: 18px 0 0;
  color: var(--muted-strong);
  font-size: 13px;
  line-height: 1.75;
}

.service .service-en {
  margin: 0;
  color: var(--muted);
  font-size: 12px;
}

.service p.en {
  margin-top: 8px;
  color: #8798a9;
  font-size: 12px;
}

.product {
  position: relative;
  height: 620px;
  min-height: 590px;
  display: grid;
  grid-template-columns: 43% 57%;
  overflow: hidden;
  background: var(--navy-950);
  border-bottom: 1px solid var(--line);
}

.product-visual {
  grid-column: 1 / -1;
  grid-row: 1;
  min-width: 0;
}

.product-visual img {
  object-position: center;
}

.product-copy {
  position: relative;
  z-index: 2;
  grid-column: 1;
  grid-row: 1;
  padding: 68px 50px 56px var(--side);
  background: rgba(3, 11, 20, 0.88);
  border-right: 1px solid var(--line-strong);
}

.product h2 {
  margin: 0 0 28px;
  font-size: clamp(36px, 3.2vw, 46px);
  line-height: 1.08;
  letter-spacing: -0.02em;
  font-weight: 480;
}

.product h2 span {
  color: var(--muted-strong);
  font-size: 0.64em;
  font-weight: 300;
}

.product-intro {
  margin-bottom: 28px;
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.product-intro strong {
  font-size: 21px;
  font-weight: 560;
}

.product-intro span {
  color: var(--muted);
  font-size: 14px;
}

.product-copy > p:not(.eyebrow):not(.visual-note) {
  max-width: 470px;
  margin: 0 0 12px;
  color: var(--muted-strong);
  font-size: 14px;
  line-height: 1.85;
}

.product-copy > p.en {
  color: var(--muted);
  font-size: 12px;
  line-height: 1.7;
}

.product-meta {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 9px 20px;
  width: fit-content;
  margin-top: 32px;
  padding-top: 20px;
  border-top: 1px solid var(--line-strong);
}

.product-meta span {
  color: var(--muted);
  font-size: 9px;
  letter-spacing: 0.14em;
}

.product-meta strong {
  color: var(--ink);
  font-size: 11px;
  font-weight: 500;
}

.visual-note {
  margin: 24px 0 0;
  color: #718294;
  font-size: 10px;
}

.company {
  padding: 58px var(--side);
  background: var(--navy-800);
  border-bottom: 1px solid var(--line);
}

.company-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
}

.company-copy {
  padding: 0 clamp(36px, 5vw, 76px) 0 0;
}

.company-copy + .company-copy {
  padding: 0 0 0 clamp(36px, 5vw, 76px);
  border-left: 1px solid var(--line-strong);
}

.company-copy h2 {
  margin: 0 0 24px;
  font-size: 28px;
  font-weight: 560;
}

.company-copy.en h2 {
  color: var(--blue);
  font-weight: 350;
}

.company-copy p:not(.eyebrow) {
  max-width: 540px;
  margin: 0;
  color: var(--muted-strong);
  font-size: 14px;
  line-height: 2;
}

.company-copy.en p {
  color: var(--muted);
  font-size: 13px;
  line-height: 1.9;
}

.contact {
  display: grid;
  grid-template-columns: 38% 62%;
  min-height: 304px;
  padding: 50px var(--side);
  background: var(--navy-950);
}

.contact-brand {
  padding: 22px clamp(32px, 4vw, 68px) 0 0;
  border-right: 1px solid var(--line-strong);
}

.contact-brand h2 {
  margin: 0 0 8px;
  font-size: 20px;
  font-weight: 580;
  letter-spacing: 0.04em;
}

.contact-brand p {
  margin: 0;
  color: var(--muted);
  font-size: 10px;
  letter-spacing: 0.12em;
}

.contact-details {
  padding-left: clamp(32px, 5vw, 78px);
}

.contact-details .eyebrow {
  margin-bottom: 14px;
}

address {
  font-style: normal;
}

.contact-row {
  display: grid;
  grid-template-columns: 110px 1fr;
  gap: 24px;
  padding: 18px 0;
  border-top: 1px solid var(--line);
}

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

.contact-row > span {
  color: var(--muted);
  font-size: 11px;
}

.contact-row p {
  margin: 0;
  color: var(--muted-strong);
  font-size: 13px;
  line-height: 1.65;
}

.contact-row a {
  color: inherit;
  text-decoration-color: rgba(24, 151, 255, 0.7);
  text-underline-offset: 4px;
}

.contact-row a:hover,
.contact-row a:focus-visible {
  color: var(--ink);
  text-decoration-color: var(--blue);
}

.contact-row small {
  color: var(--muted);
  font-size: 11px;
}

.contact-row.compact {
  grid-template-columns: 110px 1fr;
  padding: 14px 0;
}

.site-footer {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 24px var(--side) 28px;
  display: flex;
  justify-content: space-between;
  gap: 20px;
  border: 1px solid var(--line);
  border-top: 0;
  color: #718294;
  background: var(--navy-950);
}

.site-footer p {
  margin: 0;
  font-size: 9px;
  letter-spacing: 0.08em;
}

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

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

@media (max-width: 980px) {
  .site-header {
    min-height: 76px;
  }

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

  .menu-button {
    display: block;
    padding: 10px 0;
    border: 0;
    background: transparent;
    color: var(--ink);
    font: inherit;
    font-size: 13px;
  }

  .menu-button span {
    color: var(--muted);
  }

  .site-nav {
    position: absolute;
    inset: 76px 0 auto;
    padding: 14px var(--side) 20px;
    display: none;
    align-items: stretch;
    background: var(--navy-950);
    border-bottom: 1px solid var(--line-strong);
  }

  .site-nav.open {
    display: grid;
    grid-template-columns: repeat(5, 1fr);
  }

  .site-nav a {
    min-height: 58px;
    border-left: 1px solid var(--line);
  }

  .site-nav a:last-child {
    border-right: 1px solid var(--line);
  }

  .hero {
    min-height: 700px;
    padding-top: 76px;
    grid-template-columns: 48% 52%;
  }

  .hero-copy {
    padding-top: 88px;
  }

  .hero-summary {
    font-size: 13px;
  }

  .service {
    padding-inline: 26px;
  }

  .product {
    grid-template-columns: 50% 50%;
  }
}

@media (max-width: 720px) {
  :root {
    --side: 22px;
  }

  html {
    scroll-padding-top: 70px;
  }

  .site-header {
    min-height: 70px;
  }

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

  .brand span {
    font-size: 8px;
  }

  .site-nav {
    inset: 70px 0 auto;
    grid-template-columns: 1fr !important;
    padding-block: 8px 16px;
  }

  .site-nav a {
    min-height: 48px;
    flex-direction: row;
    gap: 8px;
    border-left: 0;
    border-bottom: 1px solid var(--line);
  }

  .site-nav a:last-child {
    border-right: 0;
  }

  .hero {
    min-height: auto;
    padding-top: 70px;
    display: flex;
    flex-direction: column;
  }

  .hero-copy {
    min-height: 560px;
    padding: 72px var(--side) 54px;
    border-right: 0;
  }

  .hero h1 {
    font-size: clamp(38px, 10.8vw, 46px);
  }

  .hero-en {
    margin-bottom: 34px;
  }

  .hero-visual {
    height: 340px;
    border-top: 1px solid var(--line-strong);
  }

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

  .desktop-only {
    display: none;
  }

  .services {
    padding-block: 56px 64px;
  }

  .section-heading {
    display: block;
    margin-bottom: 34px;
  }

  .section-heading .eyebrow {
    margin-bottom: 16px;
  }

  .section-heading h2 {
    margin-bottom: 8px;
  }

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

  .service {
    min-height: auto;
    padding: 34px 0;
  }

  .service + .service {
    border-left: 0;
    border-top: 1px solid var(--line-strong);
  }

  .service-number {
    margin-bottom: 14px;
  }

  .product {
    height: auto;
    min-height: auto;
    display: flex;
    flex-direction: column-reverse;
  }

  .product-copy {
    padding: 62px var(--side) 54px;
    background: var(--navy-950);
    border-right: 0;
  }

  .product-visual {
    height: 420px;
    border-bottom: 1px solid var(--line-strong);
  }

  .product-visual img {
    object-position: 62% center;
  }

  .company {
    padding-block: 58px;
  }

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

  .company-copy {
    padding: 0 0 34px;
  }

  .company-copy + .company-copy {
    padding: 34px 0 0;
    border-top: 1px solid var(--line-strong);
    border-left: 0;
  }

  .contact {
    grid-template-columns: 1fr;
    padding-block: 52px;
  }

  .contact-brand {
    padding: 0 0 38px;
    border-right: 0;
    border-bottom: 1px solid var(--line-strong);
  }

  .contact-details {
    padding: 38px 0 0;
  }

  .contact-row,
  .contact-row.compact {
    grid-template-columns: 1fr;
    gap: 8px;
  }

  .site-footer {
    flex-direction: column;
  }
}

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

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