:root {
  --bg: #f7fbfb;
  --surface: #ffffff;
  --ink: #082836;
  --muted: #617682;
  --line: rgba(8, 40, 54, 0.12);
  --brand: #149aa2;
  --brand-deep: #0c5f8f;
  --accent: #31c7bb;
  --dark: #062635;
  --shadow: 0 28px 80px rgba(5, 49, 66, 0.14);
  --header-h: 76px;
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Microsoft YaHei", sans-serif;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  color: var(--ink);
  background: var(--bg);
  font-size: 16px;
  line-height: 1.7;
  overflow-x: hidden;
}

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

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

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

.skip-link {
  position: fixed;
  top: 12px;
  left: 12px;
  z-index: 100;
  transform: translateY(-140%);
  padding: 10px 14px;
  color: #fff;
  background: var(--dark);
  border-radius: 999px;
  transition: transform 0.2s ease;
}

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

.site-header {
  position: fixed;
  inset: 0 0 auto 0;
  z-index: 50;
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: var(--header-h);
  padding: 0 clamp(22px, 4vw, 72px);
  color: var(--ink);
  transition: background 0.35s ease, box-shadow 0.35s ease, backdrop-filter 0.35s ease;
}

.site-header.is-scrolled,
.site-header.is-open {
  background: rgba(247, 251, 251, 0.88);
  box-shadow: 0 18px 48px rgba(4, 34, 45, 0.08);
  backdrop-filter: blur(18px);
}

.brand {
  display: flex;
  align-items: center;
  width: min(206px, 44vw);
}

.brand img {
  width: 100%;
  height: auto;
}

.site-nav {
  display: flex;
  align-items: center;
  gap: clamp(18px, 2.4vw, 34px);
  font-size: 0.92rem;
  letter-spacing: 0.04em;
}

.site-nav a {
  position: relative;
  color: rgba(8, 40, 54, 0.76);
  transition: color 0.25s ease;
}

.site-nav a::after {
  position: absolute;
  right: 0;
  bottom: -8px;
  left: 0;
  height: 1px;
  content: "";
  background: currentColor;
  transform: scaleX(0);
  transform-origin: right;
  transition: transform 0.25s ease;
}

.site-nav a:hover,
.site-nav a.is-active {
  color: var(--brand-deep);
}

.site-nav a:hover::after,
.site-nav a.is-active::after {
  transform: scaleX(1);
  transform-origin: left;
}

.nav-toggle {
  display: none;
  width: 44px;
  height: 44px;
  padding: 0;
  background: transparent;
  border: 0;
}

.nav-toggle span {
  display: block;
  width: 24px;
  height: 1px;
  margin: 7px auto;
  background: var(--ink);
  transition: transform 0.25s ease;
}

.site-header.is-open .nav-toggle span:first-child {
  transform: translateY(4px) rotate(38deg);
}

.site-header.is-open .nav-toggle span:last-child {
  transform: translateY(-4px) rotate(-38deg);
}

.hero {
  position: relative;
  display: grid;
  grid-template-columns: minmax(28px, 0.55fr) minmax(320px, 620px) minmax(360px, 780px) minmax(28px, 0.35fr);
  align-items: center;
  min-height: 100svh;
  padding-top: var(--header-h);
  overflow: hidden;
  background:
    radial-gradient(circle at 82% 22%, rgba(49, 199, 187, 0.3), transparent 30%),
    radial-gradient(circle at 7% 82%, rgba(12, 95, 143, 0.13), transparent 34%),
    linear-gradient(135deg, #ffffff 0%, #ecf7f8 58%, #dff1f2 100%);
}

.hero::before {
  position: absolute;
  inset: 0;
  content: "";
  opacity: 0.32;
  background-image:
    linear-gradient(rgba(8, 40, 54, 0.06) 1px, transparent 1px),
    linear-gradient(90deg, rgba(8, 40, 54, 0.05) 1px, transparent 1px);
  background-size: 84px 84px;
  mask-image: linear-gradient(90deg, transparent 0%, #000 45%, #000 100%);
}

.hero-orbit {
  position: absolute;
  width: min(72vw, 920px);
  aspect-ratio: 1;
  right: -12vw;
  top: 8vh;
  border: 1px solid rgba(20, 154, 162, 0.18);
  border-radius: 50%;
  animation: orbitPulse 7s ease-in-out infinite;
}

.hero-orbit::before,
.hero-orbit::after {
  position: absolute;
  inset: 12%;
  content: "";
  border: 1px solid rgba(12, 95, 143, 0.14);
  border-radius: 50%;
}

.hero-orbit::after {
  inset: 27%;
}

.hero-copy {
  position: relative;
  z-index: 2;
  grid-column: 2;
  max-width: 620px;
}

.eyebrow,
.section-kicker {
  margin: 0 0 18px;
  color: var(--brand-deep);
  font-size: 0.78rem;
  font-weight: 700;
  letter-spacing: 0.18em;
  text-transform: uppercase;
}

.hero h1,
.section-heading h2,
.technology-copy h2,
.contact-inner h2 {
  margin: 0;
  color: var(--ink);
  font-weight: 700;
  line-height: 1.05;
  letter-spacing: -0.055em;
}

.hero h1 {
  max-width: 11em;
  font-size: clamp(3rem, 5.35vw, 5.95rem);
}

.hero h1 span {
  display: block;
  white-space: nowrap;
}

.hero-intro {
  max-width: 620px;
  margin: 28px 0 0;
  color: rgba(8, 40, 54, 0.72);
  font-size: clamp(1.05rem, 1.4vw, 1.28rem);
}

.hero-actions,
.contact-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  margin-top: 34px;
}

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 48px;
  padding: 0 22px;
  border: 1px solid rgba(8, 40, 54, 0.16);
  border-radius: 999px;
  font-size: 0.94rem;
  font-weight: 700;
  letter-spacing: 0.02em;
  transition: transform 0.25s ease, border-color 0.25s ease, background 0.25s ease, color 0.25s ease;
}

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

.button-primary {
  color: #fff;
  background: linear-gradient(135deg, var(--brand), var(--brand-deep));
  border-color: transparent;
  box-shadow: 0 18px 42px rgba(12, 95, 143, 0.24);
}

.button-ghost {
  color: var(--brand-deep);
  background: rgba(255, 255, 255, 0.62);
}

.button-ghost:hover {
  border-color: rgba(12, 95, 143, 0.38);
  background: #fff;
}

.hero-signature {
  display: flex;
  flex-wrap: wrap;
  gap: 10px 18px;
  max-width: 600px;
  margin-top: 44px;
  padding-top: 20px;
  color: rgba(8, 40, 54, 0.58);
  border-top: 1px solid rgba(8, 40, 54, 0.12);
  font-size: 0.82rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

.hero-visual {
  position: relative;
  z-index: 1;
  grid-column: 3 / 5;
  align-self: end;
  margin-right: -6vw;
  transform: translate3d(calc(var(--mx, 0) * 1px), calc(var(--my, 0) * 1px), 0);
  transition: transform 0.4s ease-out;
}

.hero-visual::before {
  position: absolute;
  right: 14%;
  bottom: 10%;
  left: 8%;
  height: 18%;
  content: "";
  background: radial-gradient(ellipse, rgba(5, 49, 66, 0.2), transparent 68%);
  filter: blur(8px);
}

.hero-visual img {
  position: relative;
  width: min(68vw, 980px);
  margin-left: auto;
  filter: drop-shadow(0 38px 64px rgba(6, 38, 53, 0.2));
  animation: productFloat 5.8s ease-in-out infinite;
}

.section {
  padding: clamp(84px, 9vw, 150px) clamp(22px, 5vw, 84px);
}

.section-heading {
  max-width: 980px;
  margin: 0 auto clamp(46px, 6vw, 80px);
}

.section-heading h2,
.technology-copy h2,
.contact-inner h2 {
  max-width: 12.5em;
  font-size: clamp(2.35rem, 5vw, 5rem);
}

.section-heading p:not(.section-kicker),
.technology-copy p,
.contact-inner p {
  max-width: 720px;
  margin: 22px 0 0;
  color: var(--muted);
  font-size: clamp(1rem, 1.5vw, 1.18rem);
}

.product-stage {
  display: grid;
  grid-template-columns: minmax(280px, 1fr) minmax(320px, 0.9fr);
  gap: clamp(34px, 6vw, 96px);
  align-items: center;
  max-width: 1260px;
  margin: 0 auto;
}

.product-media {
  position: relative;
  min-height: 460px;
}

.product-media::before {
  position: absolute;
  inset: 8% 4% auto auto;
  width: 72%;
  aspect-ratio: 1;
  content: "";
  background: linear-gradient(135deg, rgba(49, 199, 187, 0.2), rgba(12, 95, 143, 0.05));
  border-radius: 50%;
}

.product-media img {
  position: relative;
  width: min(100%, 680px);
  filter: drop-shadow(var(--shadow));
}

.product-points {
  border-top: 1px solid var(--line);
}

.product-points article,
.capability-list li,
.tech-list li {
  border-bottom: 1px solid var(--line);
}

.product-points article {
  display: grid;
  grid-template-columns: 58px 1fr;
  gap: 18px;
  padding: 28px 0;
}

.product-points span,
.capability-list span {
  color: var(--brand);
  font-size: 0.82rem;
  font-weight: 800;
  letter-spacing: 0.12em;
}

.product-points h3,
.capability-list h3,
.scenario-rows h3 {
  margin: 0;
  color: var(--ink);
  font-size: clamp(1.25rem, 2vw, 1.8rem);
  line-height: 1.2;
  letter-spacing: -0.03em;
}

.product-points p,
.capability-list p,
.scenario-rows p {
  margin: 10px 0 0;
  color: var(--muted);
}

.product-points p {
  grid-column: 2;
}

.capability-section {
  background: #fff;
}

.capability-list {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  max-width: 1260px;
  margin: 0 auto;
  padding: 0;
  border-top: 1px solid var(--line);
  list-style: none;
}

.capability-list li {
  min-height: 260px;
  padding: 34px clamp(18px, 3vw, 42px) 40px 0;
}

.capability-list li:not(:nth-child(3n)) {
  border-right: 1px solid var(--line);
  padding-left: clamp(18px, 3vw, 42px);
}

.capability-list li:nth-child(3n + 1) {
  padding-left: 0;
}

.capability-list h3 {
  margin-top: 40px;
}

.scenarios-section {
  position: relative;
  color: #eafafa;
  background:
    radial-gradient(circle at 8% 12%, rgba(49, 199, 187, 0.28), transparent 26%),
    linear-gradient(135deg, #041c29 0%, #063147 55%, #0a5360 100%);
  overflow: hidden;
}

.scenarios-section::before {
  position: absolute;
  inset: 0;
  content: "";
  opacity: 0.26;
  background-image: radial-gradient(circle at center, rgba(255, 255, 255, 0.22) 0 1px, transparent 1.5px);
  background-size: 34px 34px;
}

.scenarios-section .section-heading,
.scenario-rows {
  position: relative;
  z-index: 1;
}

.scenarios-section h2,
.scenarios-section .section-kicker {
  color: #fff;
}

.scenarios-section .section-heading p,
.scenario-rows p {
  color: rgba(234, 250, 250, 0.72);
}

.scenario-rows {
  max-width: 1260px;
  margin: 0 auto;
  border-top: 1px solid rgba(255, 255, 255, 0.2);
}

.scenario-rows article {
  display: grid;
  grid-template-columns: minmax(130px, 0.24fr) minmax(220px, 0.42fr) minmax(260px, 0.7fr);
  gap: 24px;
  align-items: baseline;
  padding: clamp(28px, 4vw, 46px) 0;
  border-bottom: 1px solid rgba(255, 255, 255, 0.18);
}

.scenario-rows span {
  color: rgba(49, 199, 187, 0.88);
  font-size: 0.78rem;
  font-weight: 800;
  letter-spacing: 0.16em;
  text-transform: uppercase;
}

.scenario-rows h3 {
  color: #fff;
}

.technology-section {
  display: grid;
  grid-template-columns: minmax(280px, 0.82fr) minmax(340px, 1fr);
  gap: clamp(34px, 7vw, 110px);
  align-items: center;
  background: linear-gradient(180deg, #f7fbfb 0%, #eef7f8 100%);
}

.technology-visual {
  position: sticky;
  top: 110px;
  align-self: start;
}

.technology-visual img {
  width: min(100%, 560px);
  margin: 0 auto;
  filter: drop-shadow(0 34px 70px rgba(6, 38, 53, 0.16));
}

.tech-list {
  margin: 42px 0 0;
  padding: 0;
  border-top: 1px solid var(--line);
  list-style: none;
}

.tech-list li {
  display: grid;
  grid-template-columns: 170px 1fr;
  gap: 24px;
  padding: 22px 0;
}

.tech-list strong {
  color: var(--ink);
  font-size: 1.02rem;
}

.tech-list span,
.coding-line {
  color: var(--muted);
}

.coding-line {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 30px;
}

.coding-line span {
  padding: 7px 12px;
  color: #0b5965;
  background: rgba(49, 199, 187, 0.12);
  border-radius: 999px;
  font-size: 0.84rem;
}

.research-section {
  background: #fff;
}

.research-layout {
  display: grid;
  grid-template-columns: minmax(320px, 0.9fr) minmax(320px, 1fr);
  gap: clamp(34px, 7vw, 96px);
  max-width: 1260px;
  margin: 0 auto;
}

.research-statement {
  color: var(--ink);
  font-size: clamp(1.32rem, 2.3vw, 2.22rem);
  line-height: 1.38;
  letter-spacing: -0.045em;
}

.research-statement p {
  margin: 0;
}

.research-metrics {
  display: grid;
  gap: 0;
  border-top: 1px solid var(--line);
}

.research-metrics div {
  display: grid;
  grid-template-columns: minmax(280px, 0.42fr) 1fr;
  gap: 24px;
  padding: 28px 0;
  border-bottom: 1px solid var(--line);
}

.research-metrics strong {
  color: var(--brand-deep);
  font-size: clamp(2rem, 3.2vw, 3.1rem);
  line-height: 1;
  letter-spacing: -0.06em;
  white-space: nowrap;
}

.research-metrics span {
  color: var(--muted);
}

.contact-section {
  padding: clamp(84px, 10vw, 170px) clamp(22px, 5vw, 84px);
  background:
    radial-gradient(circle at 76% 12%, rgba(49, 199, 187, 0.2), transparent 28%),
    linear-gradient(135deg, #e9f8f8 0%, #ffffff 72%);
}

.contact-inner {
  max-width: 1040px;
  margin: 0 auto;
}

.contact-inner address {
  max-width: 720px;
  margin-top: 30px;
  color: rgba(8, 40, 54, 0.62);
  font-style: normal;
}

.site-footer {
  display: flex;
  flex-wrap: wrap;
  gap: 18px 28px;
  align-items: center;
  justify-content: space-between;
  padding: 30px clamp(22px, 5vw, 84px);
  color: rgba(8, 40, 54, 0.58);
  background: #fff;
  border-top: 1px solid var(--line);
  font-size: 0.9rem;
}

.site-footer img {
  width: 150px;
}

.reveal {
  opacity: 0;
  transform: translateY(28px);
  transition: opacity 0.7s ease, transform 0.7s ease;
}

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

@keyframes productFloat {
  0%,
  100% {
    transform: translateY(0) rotate(-1deg);
  }
  50% {
    transform: translateY(-18px) rotate(0.5deg);
  }
}

@keyframes orbitPulse {
  0%,
  100% {
    transform: scale(1);
    opacity: 0.9;
  }
  50% {
    transform: scale(1.04);
    opacity: 0.55;
  }
}

@media (max-width: 1060px) {
  .hero {
    grid-template-columns: minmax(22px, 1fr) minmax(280px, 680px) minmax(22px, 1fr);
    align-content: center;
    min-height: auto;
    padding-bottom: 68px;
  }

  .hero-copy {
    grid-column: 2;
    padding-top: 56px;
  }

  .hero h1 {
    font-size: clamp(3rem, 7vw, 4.9rem);
  }

  .hero-visual {
    grid-column: 2 / 4;
    margin: -28px -16vw 0 0;
  }

  .hero-visual img {
    width: min(104vw, 780px);
  }

  .product-stage,
  .technology-section,
  .research-layout {
    grid-template-columns: 1fr;
  }

  .technology-visual {
    position: relative;
    top: auto;
  }

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

  .capability-list li,
  .capability-list li:not(:nth-child(3n)),
  .capability-list li:nth-child(3n + 1) {
    padding-left: clamp(18px, 3vw, 34px);
    padding-right: clamp(18px, 3vw, 34px);
    border-right: 0;
  }

  .capability-list li:nth-child(odd) {
    border-right: 1px solid var(--line);
  }
}

@media (max-width: 760px) {
  :root {
    --header-h: 68px;
  }

  .site-header {
    padding: 0 18px;
  }

  .brand {
    width: 170px;
  }

  .nav-toggle {
    display: block;
  }

  .site-nav {
    position: absolute;
    top: var(--header-h);
    right: 14px;
    left: 14px;
    display: grid;
    gap: 0;
    padding: 12px;
    background: rgba(255, 255, 255, 0.94);
    border: 1px solid rgba(8, 40, 54, 0.08);
    border-radius: 24px;
    box-shadow: 0 24px 60px rgba(4, 34, 45, 0.14);
    transform: translateY(-12px);
    opacity: 0;
    pointer-events: none;
    transition: opacity 0.25s ease, transform 0.25s ease;
    backdrop-filter: blur(20px);
  }

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

  .site-nav a {
    padding: 13px 14px;
    color: var(--ink);
  }

  .site-nav a::after {
    display: none;
  }

  .hero {
    padding-bottom: 54px;
    overflow: hidden;
  }

  .hero-copy {
    padding-top: 28px;
    min-width: 0;
  }

  .hero h1 {
    max-width: 100%;
    font-size: clamp(2.55rem, 11.5vw, 3.35rem);
    letter-spacing: -0.06em;
  }

  .hero h1 span {
    white-space: normal;
  }

  .hero-intro {
    font-size: 0.98rem;
  }

  .hero-actions {
    gap: 10px;
  }

  .hero-actions .button {
    min-height: 44px;
    padding: 0 18px;
    font-size: 0.88rem;
  }

  .hero-signature {
    margin-top: 30px;
  }

  .hero-visual {
    margin: -4px -26vw 0 0;
  }

  .section {
    padding: 74px 20px;
  }

  .product-media {
    min-height: auto;
  }

  .product-points article,
  .tech-list li,
  .research-metrics div,
  .scenario-rows article {
    grid-template-columns: 1fr;
    gap: 10px;
  }

  .product-points p {
    grid-column: auto;
  }

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

  .capability-list li,
  .capability-list li:nth-child(odd) {
    min-height: auto;
    border-right: 0;
  }

  .capability-list h3 {
    margin-top: 26px;
  }

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

  .site-footer {
    align-items: flex-start;
    flex-direction: column;
  }
}

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.001ms !important;
    animation-iteration-count: 1 !important;
    scroll-behavior: auto !important;
    transition-duration: 0.001ms !important;
  }
}