:root {
  --void: #030910;
  --abyss: #071422;
  --hull: #0c2438;
  --steel: #163554;
  --signal: #00d2ff;
  --signal-dim: rgba(0, 210, 255, 0.45);
  --signal-soft: rgba(0, 210, 255, 0.12);
  --foam: #e7f7ff;
  --mute: #8aa0b5;
  --line: rgba(0, 210, 255, 0.18);
  --ok: #3dffb5;
  --font-display: "Chakra Petch", "Segoe UI", sans-serif;
  --font-body: "Figtree", "Segoe UI", sans-serif;
  --font-mono: "IBM Plex Mono", ui-monospace, monospace;
  --header-h: 4.5rem;
  --ease: cubic-bezier(0.22, 1, 0.36, 1);
  --max: 1120px;
}

*,
*::before,
*::after {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  min-height: 100vh;
  color: var(--foam);
  font-family: var(--font-body);
  background: var(--void);
  line-height: 1.55;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}

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

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

h1,
h2,
h3,
.hero-brand {
  font-family: var(--font-display);
  margin: 0;
  letter-spacing: 0.02em;
  line-height: 1.08;
}

p {
  margin: 0;
}

.mono {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--signal);
}

/* Ambient layer */
.ambient {
  position: fixed;
  inset: 0;
  z-index: 0;
  pointer-events: none;
}

.ambient-grid {
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(0, 210, 255, 0.035) 1px, transparent 1px),
    linear-gradient(90deg, rgba(0, 210, 255, 0.035) 1px, transparent 1px);
  background-size: 72px 72px;
  mask-image: radial-gradient(ellipse at center, black 20%, transparent 75%);
}

.ambient-glow {
  position: absolute;
  width: 55vw;
  height: 55vw;
  right: -15%;
  top: -10%;
  background: radial-gradient(circle, rgba(0, 140, 200, 0.18), transparent 68%);
  filter: blur(10px);
}

.site-header,
main,
.site-footer {
  position: relative;
  z-index: 1;
}

/* Header */
.site-header {
  position: fixed;
  inset: 0 0 auto;
  height: var(--header-h);
  z-index: 40;
  border-bottom: 1px solid transparent;
  transition: background 0.35s var(--ease), border-color 0.35s var(--ease), backdrop-filter 0.35s var(--ease);
}

.site-header.is-scrolled {
  background: rgba(3, 9, 16, 0.82);
  backdrop-filter: blur(16px);
  border-bottom-color: var(--line);
}

.header-inner {
  max-width: var(--max);
  margin: 0 auto;
  padding: 0 1.25rem;
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
}

.header-right {
  display: flex;
  align-items: center;
  gap: 0.85rem;
}

.visually-hidden {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

.lang-switch select {
  appearance: none;
  -webkit-appearance: none;
  min-width: 4.75rem;
  height: 2.2rem;
  padding: 0 1.65rem 0 0.7rem;
  border: 1px solid var(--line);
  background:
    var(--abyss)
    url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='10' height='6' viewBox='0 0 10 6'%3E%3Cpath fill='%2300d2ff' d='M0 0l5 6 5-6z'/%3E%3C/svg%3E")
    no-repeat right 0.55rem center;
  color: var(--foam);
  font-family: "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Noto Sans SC", "Microsoft YaHei", "Malgun Gothic", "Apple SD Gothic Neo", "Hiragino Sans", "Noto Sans JP", system-ui, sans-serif;
  font-size: 0.8rem;
  font-weight: 600;
  letter-spacing: 0.04em;
  line-height: 1.2;
  cursor: pointer;
}

.lang-switch select:focus {
  outline: 1px solid var(--signal);
  outline-offset: 1px;
}

.lang-switch select option {
  background: #071422;
  color: #e7f7ff;
  font-family: "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Noto Sans SC", "Microsoft YaHei", "Malgun Gothic", "Apple SD Gothic Neo", "Hiragino Sans", "Noto Sans JP", system-ui, sans-serif;
  font-size: 0.85rem;
  font-weight: 600;
}

.brand {
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

.brand-mark-wrap {
  width: 2.55rem;
  height: 2.55rem;
  display: grid;
  place-items: center;
  background: transparent;
}

.brand-mark-wrap img {
  width: 2.35rem;
  height: 2.35rem;
  object-fit: contain;
}

.brand-text {
  display: flex;
  flex-direction: column;
  gap: 0.15rem;
}

.brand-text strong {
  font-family: var(--font-display);
  font-size: 1.05rem;
  font-weight: 650;
  letter-spacing: 0.06em;
  text-transform: uppercase;
}

.brand-text small {
  font-family: var(--font-mono);
  font-size: 0.62rem;
  letter-spacing: 0.12em;
  color: var(--signal);
}

.nav {
  display: flex;
  align-items: center;
  gap: 1.35rem;
}

.nav a {
  font-size: 0.9rem;
  font-weight: 500;
  color: rgba(231, 247, 255, 0.72);
  transition: color 0.2s ease;
}

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

.nav-cta {
  padding: 0.45rem 0.9rem;
  border: 1px solid var(--signal-dim);
  color: var(--signal) !important;
}

.nav-cta:hover {
  background: var(--signal-soft);
}

.nav-toggle {
  display: none;
  width: 2.5rem;
  height: 2.5rem;
  border: 1px solid var(--line);
  background: transparent;
  cursor: pointer;
}

.nav-toggle span {
  display: block;
  width: 1.1rem;
  height: 2px;
  margin: 0.28rem auto;
  background: var(--foam);
  transition: transform 0.25s var(--ease);
}

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

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

/* Hero */
.hero {
  position: relative;
  min-height: 100vh;
  min-height: 100dvh;
  display: grid;
  align-items: center;
  isolation: isolate;
}

.hero-stage {
  position: absolute;
  inset: 0;
  z-index: -1;
  overflow: hidden;
}

.hero-photo {
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: 55% 38%;
  transform: scale(1.06);
  animation: ken 22s var(--ease) forwards;
  filter: saturate(1.1) contrast(1.12) brightness(1.25);
}

@keyframes ken {
  to {
    transform: scale(1);
  }
}

.hero-veil {
  position: absolute;
  inset: 0;
  background:
    linear-gradient(105deg, rgba(3, 9, 16, 0.86) 0%, rgba(3, 12, 24, 0.52) 50%, rgba(3, 14, 28, 0.22) 100%),
    linear-gradient(to top, rgba(3, 9, 16, 0.9) 0%, rgba(3, 9, 16, 0.2) 48%, transparent 72%);
}

.hero-scan {
  position: absolute;
  inset: 0;
  background: repeating-linear-gradient(
    to bottom,
    transparent 0,
    transparent 3px,
    rgba(0, 210, 255, 0.035) 3px,
    rgba(0, 210, 255, 0.035) 4px
  );
  mix-blend-mode: screen;
  opacity: 0.45;
  pointer-events: none;
}

.hero-radar {
  position: absolute;
  right: -2%;
  top: 48%;
  width: min(48vw, 520px);
  transform: translateY(-50%);
  opacity: 0.55;
  stroke: var(--signal);
  fill: none;
  stroke-width: 1.25;
}

.radar-sweep {
  fill: rgba(0, 210, 255, 0.12);
  stroke: none;
  transform-origin: 200px 200px;
  animation: sweep 6s linear infinite;
}

@keyframes sweep {
  to {
    transform: rotate(360deg);
  }
}

.hero-content {
  max-width: var(--max);
  width: 100%;
  margin: 0 auto;
  padding: calc(var(--header-h) + 2rem) 1.25rem 3.5rem;
}

.hero-status {
  display: inline-flex;
  align-items: center;
  gap: 0.55rem;
  margin-bottom: 1.25rem;
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--ok);
  animation: rise 0.8s var(--ease) both;
}

.pulse-dot {
  width: 0.5rem;
  height: 0.5rem;
  border-radius: 50%;
  background: var(--ok);
  box-shadow: 0 0 0 0 rgba(61, 255, 181, 0.55);
  animation: ping 1.8s ease-out infinite;
}

@keyframes ping {
  70%,
  100% {
    box-shadow: 0 0 0 10px transparent;
  }
}

.hero-title-block {
  display: flex;
  align-items: flex-start;
  gap: 1.1rem;
  animation: rise 0.8s 0.08s var(--ease) both;
}

.hero-crest {
  width: 4.75rem;
  height: 4.75rem;
  object-fit: contain;
  flex-shrink: 0;
  filter: drop-shadow(0 0 18px rgba(0, 210, 255, 0.35));
  animation: crest-glow 3.6s ease-in-out infinite;
}

@keyframes crest-glow {
  0%,
  100% {
    filter: drop-shadow(0 0 12px rgba(0, 210, 255, 0.25));
  }
  50% {
    filter: drop-shadow(0 0 26px rgba(0, 210, 255, 0.55));
  }
}

.hero-brand {
  font-size: clamp(2.4rem, 6vw, 4.2rem);
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  color: #fff;
}

.hero-brand em {
  font-style: normal;
  color: var(--signal);
}

.hero h1 {
  margin-top: 0.45rem;
  max-width: 22ch;
  font-size: clamp(1.15rem, 2.3vw, 1.55rem);
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: rgba(231, 247, 255, 0.92);
  text-shadow: 0 2px 18px rgba(0, 0, 0, 0.45);
}

.hero-lead {
  max-width: 34rem;
  margin-top: 1.1rem;
  color: rgba(231, 247, 255, 0.78);
  font-size: 1.05rem;
  animation: rise 0.8s 0.16s var(--ease) both;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.8rem;
  margin-top: 1.5rem;
  animation: rise 0.8s 0.24s var(--ease) both;
}

.hero-meta {
  list-style: none;
  display: flex;
  flex-wrap: wrap;
  gap: 1.25rem 1.75rem;
  margin: 2rem 0 0;
  padding: 1rem 0 0;
  border-top: 1px solid var(--line);
  animation: rise 0.8s 0.3s var(--ease) both;
}

.hero-meta li {
  font-family: var(--font-mono);
  font-size: 0.78rem;
  letter-spacing: 0.08em;
  color: var(--foam);
}

.hero-meta span {
  display: block;
  margin-bottom: 0.2rem;
  color: var(--mute);
  font-size: 0.65rem;
}

@keyframes rise {
  from {
    opacity: 0;
    transform: translateY(18px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 2.9rem;
  padding: 0.7rem 1.25rem;
  font-family: var(--font-display);
  font-size: 0.95rem;
  font-weight: 600;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  border: 1px solid transparent;
  transition: transform 0.2s var(--ease), background 0.2s ease, border-color 0.2s ease, color 0.2s ease, box-shadow 0.2s ease;
}

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

.btn-primary {
  background: linear-gradient(120deg, #0090c8, var(--signal));
  color: #031018;
  box-shadow: 0 0 24px rgba(0, 210, 255, 0.25);
}

.btn-primary:hover {
  box-shadow: 0 0 32px rgba(0, 210, 255, 0.4);
}

.btn-ghost {
  border-color: rgba(231, 247, 255, 0.28);
  color: var(--foam);
  background: rgba(7, 20, 34, 0.35);
}

.btn-ghost:hover {
  border-color: var(--signal);
  color: var(--signal);
  background: var(--signal-soft);
}

/* Sections shared */
.section {
  max-width: var(--max);
  margin: 0 auto;
  padding: 5rem 1.25rem;
}

.section-bar {
  display: flex;
  justify-content: space-between;
  gap: 1rem;
  margin-bottom: 1.25rem;
  padding-bottom: 0.75rem;
  border-bottom: 1px solid var(--line);
}

.section-head h2 {
  font-size: clamp(1.85rem, 3.8vw, 2.75rem);
  text-transform: uppercase;
  max-width: 16ch;
}

.section-head p {
  margin-top: 0.75rem;
  max-width: 36rem;
  color: var(--mute);
  font-size: 1.05rem;
}

/* Capabilities */
.capabilities {
  background:
    linear-gradient(180deg, transparent, rgba(0, 210, 255, 0.03) 40%, transparent);
}

.cap-rail {
  list-style: none;
  margin: 2.5rem 0 0;
  padding: 0;
  display: grid;
  gap: 0;
  border-top: 1px solid var(--line);
}

.cap-item {
  position: relative;
  padding: 1.75rem 0 1.75rem 1.25rem;
  border-bottom: 1px solid var(--line);
  border-left: 2px solid transparent;
  transition: border-color 0.25s ease, background 0.25s ease;
}

.cap-item::before {
  content: "";
  position: absolute;
  left: -5px;
  top: 2rem;
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--signal);
  box-shadow: 0 0 12px var(--signal);
  opacity: 0.55;
}

.cap-item:hover {
  border-left-color: var(--signal);
  background: linear-gradient(90deg, var(--signal-soft), transparent 55%);
}

.cap-code {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.14em;
  color: var(--signal);
  margin-bottom: 0.55rem;
}

.cap-item h3 {
  font-size: clamp(1.35rem, 2.2vw, 1.7rem);
  text-transform: uppercase;
  margin-bottom: 0.55rem;
}

.cap-item p {
  max-width: 42rem;
  color: var(--mute);
}

/* Engine */
.engine {
  max-width: none;
  padding: 0;
}

.engine-frame {
  max-width: none;
  margin: 0;
  padding: 5rem 0;
  background:
    radial-gradient(ellipse at 80% 0%, rgba(0, 210, 255, 0.12), transparent 50%),
    linear-gradient(180deg, #06101c, #0a1c30 50%, #06101c);
  border-block: 1px solid var(--line);
}

.engine-frame > .section-bar,
.engine-frame > .section-head,
.module-grid {
  max-width: var(--max);
  margin-left: auto;
  margin-right: auto;
  padding-left: 1.25rem;
  padding-right: 1.25rem;
}

.module-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1px;
  margin-top: 2.5rem;
  background: var(--line);
  border: 1px solid var(--line);
}

.module {
  background: rgba(3, 9, 16, 0.72);
  padding: 1.5rem 1.35rem 1.75rem;
  transition: background 0.25s ease;
}

.module:hover {
  background: rgba(0, 210, 255, 0.06);
}

.module header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 1rem;
}

.module-id {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.12em;
  color: var(--mute);
}

.module-state {
  font-family: var(--font-mono);
  font-size: 0.65rem;
  letter-spacing: 0.14em;
  color: var(--ok);
}

.module h3 {
  font-size: 1.2rem;
  text-transform: uppercase;
  margin-bottom: 0.7rem;
  min-height: 3.2em;
}

.module p {
  color: var(--mute);
  font-size: 0.98rem;
}

/* About */
.about-panel {
  display: grid;
  grid-template-columns: 0.9fr 1.1fr;
  gap: 2.5rem;
  align-items: center;
  padding: 2rem;
  border: 1px solid var(--line);
  background:
    linear-gradient(135deg, rgba(0, 210, 255, 0.05), transparent 45%),
    rgba(7, 20, 34, 0.65);
}

.about-visual {
  position: relative;
  display: grid;
  place-items: center;
  min-height: 260px;
}

.about-visual img {
  width: 9rem;
  position: relative;
  z-index: 1;
  filter: drop-shadow(0 0 20px rgba(0, 210, 255, 0.35));
}

.orbit {
  position: absolute;
  inset: 12%;
  border: 1px dashed var(--line);
  border-radius: 50%;
  animation: spin 28s linear infinite;
}

.orbit span {
  position: absolute;
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--signal);
  box-shadow: 0 0 10px var(--signal);
}

.orbit span:nth-child(1) {
  top: 0;
  left: 50%;
  transform: translate(-50%, -50%);
}

.orbit span:nth-child(2) {
  right: 8%;
  top: 62%;
}

.orbit span:nth-child(3) {
  left: 10%;
  top: 40%;
  background: #4d8dff;
}

@keyframes spin {
  to {
    transform: rotate(360deg);
  }
}

.about-copy .mono {
  display: inline-block;
  margin-bottom: 0.85rem;
}

.about-copy h2 {
  font-size: clamp(1.7rem, 3.2vw, 2.35rem);
  text-transform: uppercase;
  margin-bottom: 1rem;
}

.about-copy p {
  color: var(--mute);
  margin-bottom: 0.9rem;
  max-width: 38rem;
}

/* Contact */
.contact {
  padding-top: 1rem;
  padding-bottom: 5rem;
}

.contact-deck {
  text-align: center;
  padding: 3rem 1.5rem;
  border: 1px solid var(--line);
  background:
    radial-gradient(ellipse at center, rgba(0, 210, 255, 0.1), transparent 60%),
    rgba(7, 20, 34, 0.8);
}

.contact-deck h2 {
  margin: 0.85rem auto 0.7rem;
  font-size: clamp(1.8rem, 3.5vw, 2.6rem);
  text-transform: uppercase;
}

.contact-deck > p {
  color: var(--mute);
  max-width: 32rem;
  margin: 0 auto;
}

.contact-actions {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 0.8rem;
  margin-top: 1.6rem;
}

.contact-ports {
  margin-top: 1.5rem;
  color: var(--mute) !important;
}

/* Footer */
.site-footer {
  border-top: 1px solid var(--line);
  background: #02070e;
  padding: 1.75rem 1.25rem;
}

.footer-inner {
  max-width: var(--max);
  margin: 0 auto;
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  align-items: center;
  gap: 1rem;
}

.footer-brand {
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

.footer-brand img {
  width: 2rem;
  height: 2rem;
  object-fit: contain;
}

.footer-brand strong {
  display: block;
  font-family: var(--font-display);
  letter-spacing: 0.05em;
  text-transform: uppercase;
  font-size: 0.95rem;
}

.footer-brand span {
  display: block;
  font-size: 0.78rem;
  color: var(--mute);
  max-width: 28rem;
}

.footer-inner > .mono {
  color: var(--mute);
}

/* Reveal */
.reveal {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity 0.7s var(--ease), transform 0.7s var(--ease);
}

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

/* Responsive */
@media (max-width: 920px) {
  .module-grid {
    grid-template-columns: 1fr;
  }

  .module h3 {
    min-height: 0;
  }

  .about-panel {
    grid-template-columns: 1fr;
  }

  .hero-radar {
    opacity: 0.18;
    right: -20%;
  }
}

@media (max-width: 760px) {
  .nav-toggle {
    display: block;
  }

  .nav {
    display: none;
    position: fixed;
    inset: var(--header-h) 0 auto;
    left: 0;
    right: 0;
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    padding: 0.5rem 1.25rem 1rem;
    background: rgba(3, 9, 16, 0.96);
    border-bottom: 1px solid var(--line);
    z-index: 45;
  }

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

  .nav a {
    padding: 0.85rem 0;
    border-bottom: 1px solid rgba(0, 210, 255, 0.1);
  }

  .nav-cta {
    margin-top: 0.5rem;
    text-align: center;
  }

  .hero-title-block {
    flex-direction: column;
    gap: 0.85rem;
  }

  .hero-crest {
    width: 3.75rem;
    height: 3.75rem;
  }

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

  .about-panel {
    padding: 1.25rem;
  }
}

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

  *,
  *::before,
  *::after {
    animation: none !important;
    transition: none !important;
  }

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