:root {
  --bg: #07111f;
  --bg-soft: #0b1728;
  --panel: rgba(255, 255, 255, 0.055);
  --panel-strong: rgba(255, 255, 255, 0.085);
  --text: #f4f7fb;
  --muted: #aeb9c9;
  --line: rgba(255, 255, 255, 0.12);
  --accent: #47a8ff;
  --accent-soft: rgba(71, 168, 255, 0.14);
  --max-width: 1180px;
  --radius: 24px;
  --shadow: 0 24px 80px rgba(0, 0, 0, 0.24);
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  color: var(--text);
  background:
    radial-gradient(circle at 15% 10%, rgba(34, 112, 186, 0.16), transparent 34rem),
    radial-gradient(circle at 85% 30%, rgba(20, 87, 147, 0.14), transparent 32rem),
    var(--bg);
  font-family:
    Inter, "Noto Sans JP", "Hiragino Kaku Gothic ProN", "Yu Gothic",
    system-ui, -apple-system, BlinkMacSystemFont, sans-serif;
  line-height: 1.75;
  letter-spacing: 0.02em;
}

a {
  color: inherit;
}

.container {
  width: min(calc(100% - 40px), var(--max-width));
  margin-inline: auto;
}

.skip-link {
  position: fixed;
  top: 12px;
  left: 12px;
  z-index: 9999;
  padding: 10px 14px;
  color: #07111f;
  background: #fff;
  border-radius: 8px;
  transform: translateY(-140%);
  transition: transform 0.2s ease;
}

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

.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
}

/* Header */
.site-header {
  position: fixed;
  inset: 0 0 auto;
  z-index: 1000;
  border-bottom: 1px solid transparent;
  transition:
    background-color 0.25s ease,
    border-color 0.25s ease,
    backdrop-filter 0.25s ease;
}

.site-header.is-scrolled {
  background: rgba(7, 17, 31, 0.82);
  border-color: var(--line);
  backdrop-filter: blur(18px);
}

.header-inner {
  min-height: 78px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 11px;
  color: var(--text);
  text-decoration: none;
}

.brand-mark {
  width: 34px;
  height: 34px;
  display: grid;
  place-items: center;
  color: #06101c;
  background: linear-gradient(135deg, #68beff, #267fd7);
  border-radius: 11px;
  font-weight: 900;
  box-shadow: 0 8px 30px rgba(37, 135, 232, 0.35);
}

.brand-name {
  font-size: 1.1rem;
  font-weight: 800;
  letter-spacing: 0.025em;
}

.brand-name sup {
  position: relative;
  top: -0.5em;
  margin-left: 0.3em;
  color: var(--accent);
  font-size: 0.38em;
  letter-spacing: 0.12em;
}

.global-nav {
  display: flex;
  align-items: center;
  gap: 28px;
}

.global-nav a {
  position: relative;
  color: #c9d2df;
  font-size: 0.86rem;
  text-decoration: none;
  transition: color 0.2s ease;
}

.global-nav a:hover,
.global-nav a:focus-visible {
  color: #fff;
}

.nav-contact {
  padding: 10px 18px;
  border: 1px solid var(--line);
  border-radius: 999px;
}

.nav-toggle {
  display: none;
  width: 44px;
  height: 44px;
  padding: 11px;
  background: transparent;
  border: 1px solid var(--line);
  border-radius: 12px;
}

.nav-toggle span:not(.sr-only) {
  display: block;
  width: 100%;
  height: 1px;
  margin: 5px 0;
  background: #fff;
}

/* Hero */
.hero {
  position: relative;
  min-height: 100svh;
  overflow: hidden;
  padding: 150px 0 56px;
  display: flex;
  flex-direction: column;
  justify-content: center;
}

.hero-grid {
  position: absolute;
  inset: 0;
  opacity: 0.27;
  background-image:
    linear-gradient(rgba(255,255,255,0.06) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255,255,255,0.06) 1px, transparent 1px);
  background-size: 70px 70px;
  mask-image: linear-gradient(to bottom, #000, transparent 92%);
}

.hero-glow {
  position: absolute;
  border-radius: 50%;
  filter: blur(3px);
  pointer-events: none;
}

.hero-glow-a {
  width: 480px;
  height: 480px;
  right: -160px;
  top: 120px;
  background: radial-gradient(circle, rgba(51, 150, 238, 0.23), transparent 68%);
}

.hero-glow-b {
  width: 360px;
  height: 360px;
  left: -170px;
  bottom: 40px;
  background: radial-gradient(circle, rgba(22, 93, 157, 0.18), transparent 72%);
}

.hero-inner {
  position: relative;
  z-index: 2;
  display: grid;
  grid-template-columns: minmax(0, 1.1fr) minmax(360px, 0.9fr);
  gap: 72px;
  align-items: center;
}

.eyebrow,
.section-label {
  margin: 0 0 18px;
  color: var(--accent);
  font-size: 0.72rem;
  font-weight: 800;
  letter-spacing: 0.22em;
}

.hero h1 {
  max-width: 800px;
  margin: 0;
  font-size: clamp(3rem, 6.6vw, 6.5rem);
  line-height: 1.05;
  letter-spacing: -0.045em;
}

.hero h1 span {
  color: transparent;
  background: linear-gradient(100deg, #fff 10%, #74c2ff 80%);
  -webkit-background-clip: text;
  background-clip: text;
}

.hero-lead {
  max-width: 710px;
  margin: 34px 0 0;
  color: var(--muted);
  font-size: clamp(1rem, 1.6vw, 1.15rem);
}

.hero-actions {
  display: flex;
  gap: 14px;
  margin-top: 42px;
}

.button {
  min-height: 52px;
  padding: 0 24px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border-radius: 999px;
  text-decoration: none;
  font-size: 0.92rem;
  font-weight: 800;
  transition:
    transform 0.2s ease,
    border-color 0.2s ease,
    background-color 0.2s ease;
}

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

.button-primary {
  color: #05101d;
  background: linear-gradient(135deg, #6ec4ff, #2f91ec);
  box-shadow: 0 14px 36px rgba(47, 145, 236, 0.24);
}

.button-secondary {
  border: 1px solid var(--line);
  background: rgba(255,255,255,0.035);
}

.hero-visual {
  position: relative;
  width: min(440px, 100%);
  aspect-ratio: 1;
  justify-self: end;
  display: grid;
  place-items: center;
}

.hero-visual::before {
  content: "";
  position: absolute;
  inset: 9%;
  border: 1px solid rgba(255,255,255,0.12);
  border-radius: 50%;
  box-shadow:
    inset 0 0 60px rgba(69,166,255,0.07),
    0 0 100px rgba(32,113,186,0.1);
}

.orbit {
  position: absolute;
  border: 1px solid rgba(92,181,255,0.25);
  border-radius: 50%;
  animation: rotate 22s linear infinite;
}

.orbit-one { inset: 0; }
.orbit-two {
  inset: 18%;
  animation-direction: reverse;
  animation-duration: 17s;
}

.core {
  position: relative;
  z-index: 2;
  width: 46%;
  aspect-ratio: 1;
  padding: 28px;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  text-align: center;
  background: linear-gradient(145deg, rgba(28,61,95,0.78), rgba(9,22,38,0.92));
  border: 1px solid rgba(108,193,255,0.28);
  border-radius: 50%;
  box-shadow: var(--shadow);
}

.core strong {
  margin: 4px 0;
  font-size: clamp(1.35rem, 3vw, 2.3rem);
  letter-spacing: -0.03em;
}

.core span {
  color: var(--muted);
  font-size: 0.64rem;
}

.core-small {
  color: var(--accent) !important;
  text-transform: uppercase;
  letter-spacing: 0.16em;
}

.node {
  position: absolute;
  z-index: 3;
  min-width: 78px;
  padding: 9px 14px;
  color: #dbe9f7;
  background: rgba(8,21,37,0.84);
  border: 1px solid rgba(255,255,255,0.15);
  border-radius: 999px;
  text-align: center;
  font-size: 0.72rem;
  font-weight: 800;
  backdrop-filter: blur(10px);
}

.node-a { top: 7%; left: 50%; transform: translateX(-50%); }
.node-b { top: 50%; right: -2%; transform: translateY(-50%); }
.node-c { bottom: 7%; left: 50%; transform: translateX(-50%); }
.node-d { top: 50%; left: -2%; transform: translateY(-50%); }

.hero-meta {
  position: relative;
  z-index: 2;
  margin-top: 76px;
  padding-top: 24px;
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 26px;
  border-top: 1px solid var(--line);
  color: #c0cad7;
  font-size: 0.77rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
}

.hero-meta span {
  margin-right: 10px;
  color: var(--accent);
}

/* Shared sections */
.section {
  padding: 130px 0;
}

.section h2 {
  margin: 0;
  font-size: clamp(2.2rem, 4.6vw, 4.7rem);
  line-height: 1.18;
  letter-spacing: -0.04em;
}

.split-layout {
  display: grid;
  grid-template-columns: minmax(0, 0.9fr) minmax(0, 1.1fr);
  gap: 100px;
}

.section-heading {
  max-width: 760px;
  margin-bottom: 54px;
}

.section-heading > p:last-child {
  color: var(--muted);
  margin: 20px 0 0;
}

.section-heading.compact {
  margin-bottom: 36px;
}

/* About */
.section-about {
  border-top: 1px solid var(--line);
  background: linear-gradient(180deg, rgba(255,255,255,0.018), transparent);
}

.about-copy {
  color: var(--muted);
  font-size: 1.04rem;
}

.about-copy p {
  margin: 0 0 28px;
}

/* Business */
.section-business {
  background: #081321;
  border-block: 1px solid var(--line);
}

.service-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 18px;
}

.service-card {
  position: relative;
  min-height: 370px;
  padding: 38px;
  overflow: hidden;
  background: linear-gradient(145deg, rgba(255,255,255,0.065), rgba(255,255,255,0.025));
  border: 1px solid var(--line);
  border-radius: var(--radius);
  transition:
    transform 0.25s ease,
    border-color 0.25s ease,
    background-color 0.25s ease;
}

.service-card:hover {
  transform: translateY(-5px);
  border-color: rgba(86,179,255,0.38);
  background-color: rgba(255,255,255,0.025);
}

.service-number {
  position: absolute;
  top: 28px;
  right: 32px;
  color: rgba(255,255,255,0.28);
  font-size: 0.74rem;
  letter-spacing: 0.12em;
}

.service-icon {
  width: 50px;
  height: 50px;
  margin-bottom: 52px;
  display: grid;
  place-items: center;
  color: var(--accent);
  background: var(--accent-soft);
  border: 1px solid rgba(80,176,255,0.2);
  border-radius: 14px;
  font-weight: 900;
}

.service-card h3 {
  margin: 0 0 14px;
  font-size: 1.5rem;
}

.service-card p {
  max-width: 570px;
  margin: 0;
  color: var(--muted);
}

.service-card ul {
  margin: 28px 0 0;
  padding: 0;
  display: flex;
  flex-wrap: wrap;
  gap: 9px;
  list-style: none;
}

.service-card li {
  padding: 6px 10px;
  color: #c7d4e1;
  background: rgba(255,255,255,0.04);
  border: 1px solid rgba(255,255,255,0.08);
  border-radius: 999px;
  font-size: 0.72rem;
}

/* Technology */
.section-technology {
  background:
    radial-gradient(circle at 80% 20%, rgba(43, 136, 222, 0.12), transparent 26rem),
    var(--bg);
  border-bottom: 1px solid var(--line);
}

.technology-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 14px;
}

.technology-item {
  min-height: 138px;
  padding: 24px;
  display: flex;
  flex-direction: column;
  justify-content: flex-end;
  background: linear-gradient(150deg, rgba(255,255,255,0.055), rgba(255,255,255,0.022));
  border: 1px solid var(--line);
  border-radius: 18px;
  transition:
    transform 0.2s ease,
    border-color 0.2s ease;
}

.technology-item:hover {
  transform: translateY(-3px);
  border-color: rgba(86,179,255,0.38);
}

.technology-item strong {
  font-size: 1.15rem;
}

.technology-item span {
  margin-top: 6px;
  color: var(--muted);
  font-size: 0.72rem;
}

/* Values */
.section-values {
  padding-block: 110px;
}

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

.value {
  padding: 44px 34px 48px;
}

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

.value > span {
  color: var(--accent);
  font-size: 0.72rem;
}

.value h3 {
  margin: 16px 0 12px;
  font-size: 1.8rem;
}

.value p {
  margin: 0;
  color: var(--muted);
}

/* Company */
.section-company {
  background: linear-gradient(180deg, #0a1727, #07111f);
  border-block: 1px solid var(--line);
}

.company-layout {
  align-items: start;
}

.company-intro {
  max-width: 430px;
  margin-top: 28px;
  color: var(--muted);
}

.company-table {
  margin: 0;
  border-top: 1px solid var(--line);
}

.company-table > div {
  display: grid;
  grid-template-columns: 150px 1fr;
  gap: 28px;
  padding: 24px 0;
  border-bottom: 1px solid var(--line);
}

.company-table dt {
  color: var(--muted);
  font-size: 0.85rem;
}

.company-table dd {
  margin: 0;
}

/* Contact */
.section-contact {
  padding-block: 120px;
}

.contact-panel {
  padding: 58px;
  display: grid;
  grid-template-columns: 1fr minmax(260px, 0.65fr);
  gap: 60px;
  align-items: end;
  background:
    linear-gradient(130deg, rgba(31,104,166,0.24), rgba(255,255,255,0.03)),
    var(--bg-soft);
  border: 1px solid rgba(87,180,255,0.26);
  border-radius: 32px;
  box-shadow: var(--shadow);
}

.contact-panel h2 {
  font-size: clamp(2.1rem, 4.5vw, 4.2rem);
}

.contact-panel p:not(.section-label) {
  margin: 24px 0 0;
  color: var(--muted);
}

.contact-status {
  padding: 28px;
  display: flex;
  flex-direction: column;
  gap: 6px;
  background: rgba(255,255,255,0.04);
  border: 1px solid var(--line);
  border-radius: 20px;
}

.contact-status span {
  color: var(--accent);
  font-size: 0.68rem;
  font-weight: 900;
  letter-spacing: 0.16em;
}

.contact-status strong {
  font-size: 1.6rem;
}

.contact-status small {
  color: var(--muted);
}

/* Privacy */
.section-privacy {
  padding: 0 0 100px;
}

.privacy-content details {
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}

.privacy-content summary {
  padding: 24px 2px;
  cursor: pointer;
  font-weight: 800;
}

.privacy-content details > div {
  max-width: 860px;
  padding: 2px 0 28px;
  color: var(--muted);
  font-size: 0.9rem;
}

.privacy-content details p {
  margin: 0 0 14px;
}

/* Footer */
.site-footer {
  padding: 34px 0;
  border-top: 1px solid var(--line);
}

.footer-inner {
  display: grid;
  grid-template-columns: auto 1fr auto;
  gap: 30px;
  align-items: center;
}

.footer-brand .brand-mark {
  width: 30px;
  height: 30px;
  border-radius: 9px;
}

.footer-links {
  display: flex;
  justify-content: center;
  gap: 22px;
}

.footer-links a {
  color: var(--muted);
  font-size: 0.78rem;
  text-decoration: none;
}

.footer-links a:hover {
  color: #fff;
}

.footer-inner p {
  margin: 0;
  color: var(--muted);
  font-size: 0.76rem;
}

/* Reveal animation */
[data-reveal] {
  opacity: 0;
  transform: translateY(22px);
  transition:
    opacity 0.72s ease,
    transform 0.72s ease;
}

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

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

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

  *,
  *::before,
  *::after {
    animation-duration: 0.001ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.001ms !important;
  }

  [data-reveal] {
    opacity: 1;
    transform: none;
  }
}

@media (max-width: 960px) {
  .technology-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (max-width: 900px) {
  .hero {
    padding-top: 126px;
  }

  .hero-inner {
    grid-template-columns: 1fr;
    gap: 48px;
  }

  .hero-visual {
    width: min(430px, 90vw);
    justify-self: center;
  }

  .hero-meta {
    grid-template-columns: 1fr;
    gap: 10px;
  }

  .split-layout,
  .contact-panel {
    grid-template-columns: 1fr;
    gap: 44px;
  }

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

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

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

  .footer-inner {
    grid-template-columns: 1fr;
    justify-items: start;
  }

  .footer-links {
    justify-content: flex-start;
    flex-wrap: wrap;
  }
}

@media (max-width: 720px) {
  .container {
    width: min(calc(100% - 28px), var(--max-width));
  }

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

  .nav-toggle {
    display: block;
  }

  .global-nav {
    position: fixed;
    inset: 70px 14px auto;
    padding: 18px;
    display: none;
    flex-direction: column;
    align-items: stretch;
    gap: 6px;
    background: rgba(8,20,35,0.96);
    border: 1px solid var(--line);
    border-radius: 18px;
    box-shadow: var(--shadow);
    backdrop-filter: blur(20px);
  }

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

  .global-nav a {
    padding: 12px 10px;
  }

  .nav-contact {
    text-align: center;
  }

  .hero {
    min-height: auto;
    padding: 120px 0 46px;
  }

  .hero h1 {
    font-size: clamp(2.75rem, 15vw, 4.6rem);
  }

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

  .hero-visual {
    width: min(340px, 90vw);
  }

  .node {
    min-width: 65px;
    padding: 7px 10px;
    font-size: 0.64rem;
  }

  .section {
    padding: 88px 0;
  }

  .service-card {
    min-height: auto;
    padding: 30px 24px;
  }

  .service-icon {
    margin-bottom: 38px;
  }

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

  .company-table > div {
    grid-template-columns: 1fr;
    gap: 5px;
    padding: 20px 0;
  }

  .contact-panel {
    padding: 34px 24px;
    border-radius: 24px;
  }
}