:root {
  --ink: #0a1520;
  --ink-2: #152433;
  --navy: #081421;
  --navy-soft: #0d1e2d;
  --navy-panel: #102638;
  --paper: #f4f7f8;
  --white: #ffffff;
  --muted: #5f6f7e;
  --line: rgba(10, 21, 32, 0.14);
  --line-dark: rgba(255, 255, 255, 0.14);
  --accent: #36e0c2;
  --accent-2: #70aefc;
  --accent-dark: #0aa88c;
  --max-width: 1180px;
  --header-height: 84px;
  --shadow: 0 30px 80px rgba(6, 18, 29, 0.18);
  --font-sans: "Noto Sans JP", "Yu Gothic", "Hiragino Kaku Gothic ProN", "Meiryo", sans-serif;
  --font-en: "Arial", "Helvetica Neue", sans-serif;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
  scroll-padding-top: calc(var(--header-height) + 24px);
}

body {
  margin: 0;
  color: var(--ink);
  background: var(--paper);
  font-family: var(--font-sans);
  font-size: 16px;
  line-height: 1.85;
  letter-spacing: 0.035em;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

body.menu-open {
  overflow: hidden;
}

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

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

button,
input,
textarea,
select {
  font: inherit;
}

p,
h1,
h2,
h3 {
  margin-top: 0;
}

button {
  color: inherit;
}

::selection {
  color: var(--navy);
  background: var(--accent);
}

.container {
  width: min(calc(100% - 48px), var(--max-width));
  margin-inline: auto;
}

.narrow-container {
  width: min(calc(100% - 48px), 820px);
}

.skip-link {
  position: fixed;
  top: 12px;
  left: 12px;
  z-index: 9999;
  padding: 10px 14px;
  color: var(--navy);
  background: var(--accent);
  transform: translateY(-150%);
  transition: transform 0.2s ease;
}

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

/* Header */
.site-header {
  position: absolute;
  top: 0;
  left: 0;
  z-index: 1000;
  width: 100%;
  color: var(--white);
  transition: background 0.25s ease, box-shadow 0.25s ease, transform 0.25s ease;
}

.site-header.is-fixed,
.site-header-solid {
  position: fixed;
  color: var(--white);
  background: rgba(8, 20, 33, 0.94);
  box-shadow: 0 12px 32px rgba(0, 0, 0, 0.16);
  backdrop-filter: blur(14px);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  min-height: var(--header-height);
  gap: 28px;
}

.brand {
  display: inline-flex;
  align-items: center;
  min-width: 0;
  gap: 13px;
}

.brand-mark {
  display: grid;
  flex: 0 0 auto;
  width: 45px;
  height: 45px;
  place-items: center;
  border: 1px solid rgba(255, 255, 255, 0.38);
  border-radius: 4px;
  color: var(--accent);
  font-family: var(--font-en);
  font-size: 20px;
  font-weight: 800;
  line-height: 1;
  letter-spacing: -0.08em;
}

.brand-copy {
  display: flex;
  min-width: 0;
  flex-direction: column;
  line-height: 1.25;
}

.brand-copy strong {
  color: var(--white);
  font-size: 14px;
  font-weight: 700;
  letter-spacing: 0.11em;
  white-space: nowrap;
}

.brand-copy small {
  margin-top: 5px;
  color: rgba(255, 255, 255, 0.55);
  font-family: var(--font-en);
  font-size: 8px;
  font-weight: 700;
  letter-spacing: 0.19em;
  white-space: nowrap;
}

.global-nav {
  display: flex;
  align-items: center;
  margin-left: auto;
  gap: 24px;
}

.global-nav a {
  position: relative;
  padding: 30px 0;
  color: rgba(255, 255, 255, 0.78);
  font-size: 12px;
  font-weight: 650;
  letter-spacing: 0.09em;
  transition: color 0.2s ease;
}

.global-nav a::after {
  position: absolute;
  right: 0;
  bottom: 22px;
  left: 0;
  height: 1px;
  background: var(--accent);
  content: "";
  transform: scaleX(0);
  transform-origin: right center;
  transition: transform 0.25s ease;
}

.global-nav a:hover,
.global-nav a:focus-visible {
  color: var(--white);
}

.global-nav a:hover::after,
.global-nav a:focus-visible::after {
  transform: scaleX(1);
  transform-origin: left center;
}

.global-nav .nav-contact {
  padding: 12px 18px;
  border: 1px solid rgba(255, 255, 255, 0.26);
  border-radius: 3px;
  color: var(--white);
}

.global-nav .nav-contact::after {
  display: none;
}

.global-nav .nav-contact:hover,
.global-nav .nav-contact:focus-visible {
  border-color: var(--accent);
  color: var(--navy);
  background: var(--accent);
}

.menu-button {
  display: none;
  align-items: center;
  padding: 8px 0;
  border: 0;
  background: transparent;
  cursor: pointer;
  gap: 10px;
}

.menu-label {
  font-family: var(--font-en);
  font-size: 10px;
  font-weight: 700;
  letter-spacing: 0.16em;
}

.menu-lines {
  display: flex;
  width: 25px;
  flex-direction: column;
  gap: 7px;
}

.menu-lines i {
  display: block;
  width: 100%;
  height: 1px;
  background: currentColor;
  transition: transform 0.2s ease;
}

.menu-button[aria-expanded="true"] .menu-lines i:first-child {
  transform: translateY(4px) rotate(45deg);
}

.menu-button[aria-expanded="true"] .menu-lines i:last-child {
  transform: translateY(-4px) rotate(-45deg);
}

/* Hero */
.hero {
  position: relative;
  min-height: 860px;
  overflow: hidden;
  color: var(--white);
  background:
    linear-gradient(115deg, rgba(8, 20, 33, 0.99) 0%, rgba(8, 20, 33, 0.97) 46%, rgba(11, 31, 45, 0.93) 100%),
    var(--navy);
  isolation: isolate;
}

.hero::before {
  position: absolute;
  top: 0;
  left: 0;
  z-index: -1;
  width: 100%;
  height: 100%;
  background: linear-gradient(90deg, transparent 0 49.9%, rgba(255, 255, 255, 0.05) 50%, transparent 50.1%);
  content: "";
}

.hero-grid {
  position: absolute;
  inset: 0;
  z-index: -3;
  opacity: 0.16;
  background-image:
    linear-gradient(rgba(255, 255, 255, 0.14) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255, 255, 255, 0.14) 1px, transparent 1px);
  background-position: center;
  background-size: 82px 82px;
  mask-image: linear-gradient(to bottom, #000 0%, rgba(0, 0, 0, 0.85) 62%, transparent 100%);
}

.hero-glow {
  position: absolute;
  z-index: -2;
  border-radius: 50%;
  filter: blur(10px);
  pointer-events: none;
}

.hero-glow-a {
  top: -210px;
  right: -120px;
  width: 650px;
  height: 650px;
  background: radial-gradient(circle, rgba(54, 224, 194, 0.17), transparent 68%);
}

.hero-glow-b {
  bottom: 40px;
  left: 36%;
  width: 430px;
  height: 430px;
  background: radial-gradient(circle, rgba(112, 174, 252, 0.13), transparent 70%);
}

.hero-inner {
  display: grid;
  min-height: 725px;
  padding-top: calc(var(--header-height) + 75px);
  align-items: center;
  grid-template-columns: minmax(0, 1.18fr) minmax(390px, 0.82fr);
  gap: 70px;
}

.eyebrow,
.section-number {
  margin-bottom: 24px;
  color: var(--accent-dark);
  font-family: var(--font-en);
  font-size: 11px;
  font-weight: 800;
  letter-spacing: 0.24em;
}

.hero .eyebrow {
  color: var(--accent);
}

.hero h1 {
  margin-bottom: 27px;
  color: var(--white);
  font-size: clamp(42px, 4.55vw, 62px);
  font-weight: 650;
  line-height: 1.28;
  letter-spacing: 0.015em;
}

.hero h1 .hero-line {
  display: block;
  color: var(--white);
  white-space: nowrap;
}

.hero h1 em {
  position: relative;
  color: var(--white);
  font-style: normal;
  white-space: nowrap;
}

.hero h1 em::after {
  position: absolute;
  right: 0;
  bottom: -8px;
  left: 0;
  height: 5px;
  background: linear-gradient(90deg, var(--accent), rgba(54, 224, 194, 0));
  content: "";
}

.hero-lead {
  max-width: 680px;
  margin-bottom: 34px;
  color: rgba(255, 255, 255, 0.7);
  font-size: 16px;
  line-height: 2.05;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

.button {
  display: inline-flex;
  min-height: 54px;
  align-items: center;
  justify-content: space-between;
  padding: 0 21px;
  border: 1px solid transparent;
  border-radius: 2px;
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.1em;
  transition: transform 0.2s ease, background 0.2s ease, border-color 0.2s ease, color 0.2s ease;
  gap: 40px;
}

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

.button-primary {
  color: var(--navy);
  background: var(--accent);
}

.button-primary:hover,
.button-primary:focus-visible {
  background: #70f0da;
}

.button-ghost {
  border-color: rgba(255, 255, 255, 0.3);
  color: var(--white);
  background: transparent;
}

.button-ghost:hover,
.button-ghost:focus-visible {
  border-color: var(--white);
  background: rgba(255, 255, 255, 0.08);
}

.hero-visual {
  position: relative;
  width: min(100%, 460px);
  aspect-ratio: 1;
  justify-self: end;
}

.orbit {
  position: absolute;
  top: 50%;
  left: 50%;
  border: 1px solid rgba(255, 255, 255, 0.18);
  border-radius: 50%;
  transform: translate(-50%, -50%);
}

.orbit::before,
.orbit::after {
  position: absolute;
  border-radius: 50%;
  background: var(--accent);
  box-shadow: 0 0 22px rgba(54, 224, 194, 0.8);
  content: "";
}

.orbit-outer {
  width: 88%;
  height: 88%;
  animation: rotate 28s linear infinite;
}

.orbit-outer::before {
  top: 25%;
  left: 1.5%;
  width: 7px;
  height: 7px;
}

.orbit-outer::after {
  right: 14%;
  bottom: 12%;
  width: 4px;
  height: 4px;
}

.orbit-inner {
  width: 58%;
  height: 58%;
  border-style: dashed;
  animation: rotate-reverse 22s linear infinite;
}

.orbit-inner::before {
  top: -3px;
  left: 52%;
  width: 6px;
  height: 6px;
}

.orbit-inner::after {
  right: -3px;
  bottom: 42%;
  width: 6px;
  height: 6px;
  background: var(--accent-2);
  box-shadow: 0 0 22px rgba(112, 174, 252, 0.8);
}

.core {
  position: absolute;
  top: 50%;
  left: 50%;
  display: flex;
  width: 190px;
  height: 190px;
  align-items: center;
  justify-content: center;
  border: 1px solid rgba(255, 255, 255, 0.12);
  border-radius: 50%;
  background: radial-gradient(circle at 42% 35%, rgba(54, 224, 194, 0.14), rgba(8, 20, 33, 0.7) 62%);
  box-shadow: 0 0 70px rgba(54, 224, 194, 0.08), inset 0 0 40px rgba(255, 255, 255, 0.04);
  transform: translate(-50%, -50%);
  flex-direction: column;
  text-align: center;
}

.core small {
  color: rgba(255, 255, 255, 0.45);
  font-family: var(--font-en);
  font-size: 9px;
  letter-spacing: 0.2em;
}

.core strong {
  margin: 9px 0 5px;
  color: var(--white);
  font-family: var(--font-en);
  font-size: 21px;
  letter-spacing: 0.12em;
}

.core span {
  color: var(--accent);
  font-family: var(--font-en);
  font-size: 8px;
  font-weight: 700;
  letter-spacing: 0.17em;
}

.orbit-label {
  position: absolute;
  display: flex;
  align-items: center;
  padding: 9px 12px;
  border: 1px solid rgba(255, 255, 255, 0.13);
  border-radius: 2px;
  color: rgba(255, 255, 255, 0.68);
  background: rgba(7, 19, 31, 0.62);
  backdrop-filter: blur(8px);
  font-family: var(--font-en);
  font-size: 8px;
  font-weight: 700;
  letter-spacing: 0.12em;
  gap: 9px;
}

.orbit-label b {
  color: var(--accent);
  font-size: 8px;
}

.label-1 {
  top: 11%;
  left: 7%;
}

.label-2 {
  top: 20%;
  right: -1%;
}

.label-3 {
  right: 5%;
  bottom: 16%;
}

.label-4 {
  bottom: 5%;
  left: 2%;
}

.focus-strip {
  display: grid;
  min-height: 118px;
  border-top: 1px solid rgba(255, 255, 255, 0.14);
  grid-template-columns: repeat(4, 1fr);
}

.focus-strip > div {
  position: relative;
  display: grid;
  padding: 26px 30px 25px 20px;
  border-right: 1px solid rgba(255, 255, 255, 0.11);
  align-content: center;
  grid-template-columns: 28px 1fr;
  column-gap: 15px;
}

.focus-strip > div:last-child {
  border-right: 0;
}

.focus-strip span {
  grid-row: 1 / span 2;
  color: var(--accent);
  font-family: var(--font-en);
  font-size: 9px;
  font-weight: 700;
  letter-spacing: 0.1em;
}

.focus-strip strong {
  color: var(--white);
  font-size: 14px;
  font-weight: 650;
  letter-spacing: 0.08em;
}

.focus-strip small {
  color: rgba(255, 255, 255, 0.35);
  font-family: var(--font-en);
  font-size: 8px;
  text-transform: uppercase;
  letter-spacing: 0.17em;
}

@keyframes rotate {
  to { transform: translate(-50%, -50%) rotate(360deg); }
}

@keyframes rotate-reverse {
  to { transform: translate(-50%, -50%) rotate(-360deg); }
}

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

.split-layout {
  display: grid;
  grid-template-columns: minmax(300px, 0.78fr) minmax(0, 1.22fr);
  gap: 90px;
}

.section-heading h2 {
  margin-bottom: 0;
  color: var(--ink);
  font-size: clamp(32px, 4vw, 52px);
  font-weight: 620;
  line-height: 1.45;
  letter-spacing: 0.025em;
}

.heading-row {
  display: flex;
  align-items: end;
  justify-content: space-between;
  margin-bottom: 58px;
  gap: 50px;
}

.heading-note {
  max-width: 530px;
  margin: 0 0 7px;
  color: var(--muted);
  font-size: 14px;
}

.section-about {
  background: var(--white);
}

.about-copy {
  padding-top: 42px;
}

.about-copy p {
  color: var(--muted);
  font-size: 15px;
}

.about-copy .lead-copy {
  margin-bottom: 26px;
  color: var(--ink);
  font-size: clamp(20px, 2vw, 27px);
  font-weight: 560;
  line-height: 1.8;
  letter-spacing: 0.035em;
}

.about-principle {
  display: grid;
  margin-top: 45px;
  padding: 28px 30px;
  border-left: 3px solid var(--accent-dark);
  background: #eef4f4;
  gap: 8px;
}

.about-principle span {
  color: var(--accent-dark);
  font-family: var(--font-en);
  font-size: 9px;
  font-weight: 800;
  letter-spacing: 0.2em;
}

.about-principle strong {
  color: var(--ink);
  font-size: 16px;
  font-weight: 650;
}

/* Business */
.section-dark {
  position: relative;
  color: var(--white);
  background: var(--navy);
}

.section-dark::before {
  position: absolute;
  inset: 0;
  opacity: 0.12;
  background-image:
    linear-gradient(rgba(255, 255, 255, 0.08) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255, 255, 255, 0.08) 1px, transparent 1px);
  background-size: 100px 100px;
  content: "";
  pointer-events: none;
}

.section-dark .container {
  position: relative;
}

.section-dark .section-heading h2 {
  color: var(--white);
}

.section-dark .section-number {
  color: var(--accent);
}

.section-dark .heading-note {
  color: rgba(255, 255, 255, 0.53);
}

.service-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  background: rgba(255, 255, 255, 0.13);
}

.service-card {
  min-height: 425px;
  padding: 42px;
  background: rgba(8, 20, 33, 0.92);
  transition: background 0.25s ease, transform 0.25s ease;
}

.service-card:hover {
  z-index: 1;
  background: var(--navy-panel);
  transform: translateY(-3px);
}

.service-top {
  display: flex;
  align-items: start;
  justify-content: space-between;
  margin-bottom: 44px;
}

.service-no {
  color: var(--accent);
  font-family: var(--font-en);
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.16em;
}

.service-top svg {
  width: 45px;
  height: 45px;
  fill: none;
  stroke: rgba(255, 255, 255, 0.55);
  stroke-linecap: round;
  stroke-linejoin: round;
  stroke-width: 1.3;
}

.service-card h3 {
  margin-bottom: 18px;
  color: var(--white);
  font-size: 21px;
  font-weight: 620;
  line-height: 1.5;
}

.service-card p {
  margin-bottom: 25px;
  color: rgba(255, 255, 255, 0.58);
  font-size: 13px;
  line-height: 1.9;
}

.service-card ul {
  display: flex;
  flex-wrap: wrap;
  margin: 0;
  padding: 0;
  list-style: none;
  gap: 7px;
}

.service-card li {
  padding: 6px 9px;
  border: 1px solid rgba(255, 255, 255, 0.14);
  color: rgba(255, 255, 255, 0.68);
  font-size: 9px;
  letter-spacing: 0.08em;
}

/* Strengths */
.section-strengths {
  background: var(--white);
}

.strength-list {
  border-top: 1px solid var(--line);
}

.strength-item {
  display: grid;
  min-height: 180px;
  align-items: center;
  padding: 32px 0;
  border-bottom: 1px solid var(--line);
  grid-template-columns: 95px minmax(0, 1fr) 190px;
  gap: 30px;
}

.strength-index {
  display: grid;
  width: 54px;
  height: 54px;
  place-items: center;
  border: 1px solid var(--line);
  border-radius: 50%;
  color: var(--accent-dark);
  font-family: var(--font-en);
  font-size: 15px;
  font-weight: 800;
}

.strength-item h3 {
  margin-bottom: 9px;
  font-size: 22px;
  font-weight: 650;
}

.strength-item p {
  max-width: 740px;
  margin-bottom: 0;
  color: var(--muted);
  font-size: 13px;
}

.strength-en {
  color: #cbd4d9;
  font-family: var(--font-en);
  font-size: 10px;
  font-weight: 800;
  text-align: right;
  letter-spacing: 0.18em;
}

/* Research */
.section-research {
  background: #eaf0f2;
}

.research-layout {
  display: grid;
  grid-template-columns: minmax(260px, 0.74fr) minmax(0, 1.26fr);
  gap: 92px;
}

.research-heading {
  position: sticky;
  top: calc(var(--header-height) + 35px);
  align-self: start;
}

.research-heading p:last-child {
  margin-top: 26px;
  color: var(--muted);
  font-size: 14px;
}

.research-list {
  display: grid;
  gap: 12px;
}

.research-item {
  display: grid;
  min-height: 145px;
  align-items: center;
  padding: 30px 34px;
  border-left: 3px solid transparent;
  background: var(--white);
  box-shadow: 0 12px 30px rgba(16, 36, 51, 0.04);
  grid-template-columns: 58px 1fr;
  gap: 20px;
  transition: border-color 0.2s ease, transform 0.2s ease, box-shadow 0.2s ease;
}

.research-item:hover {
  border-left-color: var(--accent-dark);
  box-shadow: 0 18px 45px rgba(16, 36, 51, 0.09);
  transform: translateX(4px);
}

.research-item > span {
  color: var(--accent-dark);
  font-family: var(--font-en);
  font-size: 11px;
  font-weight: 800;
  letter-spacing: 0.12em;
}

.research-item h3 {
  margin-bottom: 8px;
  font-size: 19px;
  font-weight: 650;
}

.research-item p {
  margin-bottom: 0;
  color: var(--muted);
  font-size: 13px;
  line-height: 1.8;
}

/* Collaboration */
.collaboration-section {
  position: relative;
  overflow: hidden;
  padding: 95px 0;
  color: var(--white);
  background: linear-gradient(115deg, #0ca88d 0%, #087d82 56%, #0a4c69 100%);
}

.collaboration-section::before {
  position: absolute;
  top: -180px;
  right: -100px;
  width: 520px;
  height: 520px;
  border: 1px solid rgba(255, 255, 255, 0.15);
  border-radius: 50%;
  content: "";
}

.collaboration-section::after {
  position: absolute;
  right: 145px;
  bottom: -230px;
  width: 410px;
  height: 410px;
  border: 1px solid rgba(255, 255, 255, 0.12);
  border-radius: 50%;
  content: "";
}

.collaboration-inner {
  position: relative;
  z-index: 1;
  display: grid;
  align-items: center;
  grid-template-columns: 1fr 0.8fr;
  gap: 90px;
}

.collaboration-section .section-number {
  color: rgba(255, 255, 255, 0.7);
}

.collaboration-section h2 {
  margin-bottom: 0;
  font-size: clamp(31px, 4vw, 50px);
  font-weight: 620;
  line-height: 1.45;
}

.collaboration-copy p {
  margin-bottom: 29px;
  color: rgba(255, 255, 255, 0.78);
  font-size: 14px;
}

.button-light {
  min-width: 225px;
  color: var(--navy);
  background: var(--white);
}

.button-light:hover,
.button-light:focus-visible {
  background: #ecfffb;
}

/* Company */
.section-company {
  background: var(--white);
}

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

.company-note {
  max-width: 320px;
  margin-top: 24px;
  color: var(--muted);
  font-size: 11px;
  line-height: 1.8;
}

.company-table-wrap {
  border-top: 2px solid var(--ink);
}

.company-table {
  width: 100%;
  border-collapse: collapse;
}

.company-table th,
.company-table td {
  padding: 24px 4px;
  border-bottom: 1px solid var(--line);
  vertical-align: top;
  text-align: left;
}

.company-table th {
  width: 150px;
  color: var(--muted);
  font-size: 11px;
  font-weight: 650;
  letter-spacing: 0.08em;
}

.company-table td {
  color: var(--ink);
  font-size: 14px;
}

.placeholder {
  margin-left: 5px;
  color: #a75a4c;
  font-size: 11px;
}

/* Contact */
.section-contact {
  color: var(--white);
  background: var(--navy);
}

.contact-inner {
  display: grid;
  align-items: start;
  grid-template-columns: minmax(280px, 0.78fr) minmax(0, 1.22fr);
  gap: 90px;
}

.section-contact .section-number {
  color: var(--accent);
}

.contact-heading h2 {
  margin-bottom: 0;
  font-size: clamp(36px, 4.6vw, 60px);
  font-weight: 620;
  line-height: 1.4;
}

.contact-copy > p:first-child {
  max-width: 650px;
  margin-bottom: 30px;
  color: rgba(255, 255, 255, 0.62);
  font-size: 14px;
}

.contact-mail {
  display: grid;
  min-height: 92px;
  align-items: center;
  padding: 22px 26px;
  border: 1px solid rgba(255, 255, 255, 0.2);
  grid-template-columns: 80px 1fr 24px;
  gap: 15px;
  transition: border-color 0.2s ease, background 0.2s ease;
}

.contact-mail:hover,
.contact-mail:focus-visible {
  border-color: var(--accent);
  background: rgba(54, 224, 194, 0.05);
}

.contact-mail small {
  color: var(--accent);
  font-family: var(--font-en);
  font-size: 9px;
  font-weight: 800;
  letter-spacing: 0.18em;
}

.contact-mail strong {
  overflow: hidden;
  color: var(--white);
  font-family: var(--font-en);
  font-size: clamp(18px, 2.4vw, 27px);
  font-weight: 500;
  text-overflow: ellipsis;
  white-space: nowrap;
  letter-spacing: 0.04em;
}

.contact-mail > span {
  color: var(--accent);
  font-size: 18px;
}

.contact-caution {
  margin: 11px 0 0;
  color: #efc2b9;
  font-size: 10px;
}

/* Footer */
.site-footer {
  padding: 50px 0 32px;
  color: var(--white);
  background: #050e17;
}

.footer-inner {
  display: grid;
  align-items: center;
  grid-template-columns: 1fr auto;
  gap: 25px 45px;
}

.footer-brand {
  display: flex;
  align-items: center;
  gap: 13px;
}

.footer-brand > div {
  display: flex;
  flex-direction: column;
  line-height: 1.3;
}

.footer-brand strong {
  font-size: 13px;
  letter-spacing: 0.09em;
}

.footer-brand small {
  margin-top: 5px;
  color: rgba(255, 255, 255, 0.38);
  font-family: var(--font-en);
  font-size: 8px;
  letter-spacing: 0.17em;
}

.footer-links {
  display: flex;
  flex-wrap: wrap;
  justify-content: flex-end;
  gap: 18px;
}

.footer-links a {
  color: rgba(255, 255, 255, 0.52);
  font-size: 10px;
  transition: color 0.2s ease;
}

.footer-links a:hover,
.footer-links a:focus-visible {
  color: var(--accent);
}

.copyright {
  margin: 20px 0 0;
  color: rgba(255, 255, 255, 0.28);
  font-family: var(--font-en);
  font-size: 8px;
  letter-spacing: 0.12em;
  grid-column: 1 / -1;
}

/* Subpage / privacy */
.subpage {
  background: var(--white);
}

.subpage .site-header {
  position: fixed;
}

.subpage-back {
  display: inline-flex;
  align-items: center;
  color: rgba(255, 255, 255, 0.75);
  font-size: 11px;
  font-weight: 700;
  gap: 10px;
}

.subpage-back:hover,
.subpage-back:focus-visible {
  color: var(--accent);
}

.subpage-hero {
  padding: 190px 0 85px;
  color: var(--white);
  background:
    linear-gradient(115deg, rgba(8, 20, 33, 0.99), rgba(10, 46, 61, 0.94)),
    var(--navy);
}

.subpage-hero .section-number {
  color: var(--accent);
}

.subpage-hero h1 {
  margin-bottom: 12px;
  font-size: clamp(36px, 5vw, 58px);
  font-weight: 620;
  line-height: 1.35;
}

.subpage-hero p:last-child {
  margin-bottom: 0;
  color: rgba(255, 255, 255, 0.55);
  font-size: 13px;
}

.privacy-content {
  padding: 100px 0 120px;
}

.privacy-content > .container > p:first-child {
  margin-bottom: 60px;
  font-size: 15px;
}

.privacy-content section {
  margin-top: 48px;
  padding-top: 30px;
  border-top: 1px solid var(--line);
}

.privacy-content h2 {
  margin-bottom: 18px;
  font-size: 20px;
  font-weight: 650;
}

.privacy-content p,
.privacy-content li {
  color: var(--muted);
  font-size: 14px;
}

.privacy-content ul {
  padding-left: 1.35em;
}

.privacy-date {
  margin-top: 62px;
  text-align: right;
}

.legal-note {
  margin-top: 30px;
  padding: 20px 22px;
  border-left: 3px solid #c27b6e;
  color: #7d493f !important;
  background: #fbf4f2;
  font-size: 11px !important;
}

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

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

.service-card:nth-child(2),
.research-item:nth-child(2) {
  transition-delay: 0.08s;
}

.service-card:nth-child(3),
.research-item:nth-child(3) {
  transition-delay: 0.16s;
}

.service-card:nth-child(4),
.research-item:nth-child(4) {
  transition-delay: 0.24s;
}

/* Focus */
a:focus-visible,
button:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 4px;
}

/* Responsive */
@media (max-width: 980px) {
  :root {
    --header-height: 74px;
  }

  .container {
    width: min(calc(100% - 36px), var(--max-width));
  }

  .narrow-container {
    width: min(calc(100% - 36px), 820px);
  }

  .brand-copy strong {
    font-size: 12px;
  }

  .brand-copy small {
    display: none;
  }

  .menu-button {
    display: inline-flex;
  }

  .global-nav {
    position: fixed;
    top: var(--header-height);
    right: 0;
    bottom: 0;
    left: 0;
    display: grid;
    visibility: hidden;
    margin: 0;
    padding: 34px 28px 90px;
    align-content: start;
    gap: 0;
    opacity: 0;
    background: rgba(8, 20, 33, 0.98);
    transform: translateY(-12px);
    transition: opacity 0.2s ease, visibility 0.2s ease, transform 0.2s ease;
  }

  .global-nav.is-open {
    visibility: visible;
    opacity: 1;
    transform: translateY(0);
  }

  .global-nav a {
    padding: 19px 2px;
    border-bottom: 1px solid rgba(255, 255, 255, 0.11);
    font-size: 14px;
  }

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

  .global-nav .nav-contact {
    margin-top: 24px;
    padding: 17px 18px;
    text-align: center;
  }

  .hero {
    min-height: auto;
  }

  .hero-inner {
    min-height: 760px;
    padding-top: calc(var(--header-height) + 70px);
    padding-bottom: 55px;
    grid-template-columns: 1fr;
    gap: 25px;
  }

  .hero-copy {
    max-width: 760px;
  }

  .hero-visual {
    position: absolute;
    right: -160px;
    bottom: 85px;
    z-index: -1;
    width: 490px;
    opacity: 0.32;
  }

  .focus-strip {
    min-height: 190px;
    grid-template-columns: repeat(2, 1fr);
  }

  .focus-strip > div:nth-child(2) {
    border-right: 0;
  }

  .focus-strip > div:nth-child(-n+2) {
    border-bottom: 1px solid rgba(255, 255, 255, 0.11);
  }

  .section {
    padding: 100px 0;
  }

  .split-layout,
  .research-layout,
  .contact-inner {
    grid-template-columns: 1fr;
    gap: 45px;
  }

  .about-copy {
    padding-top: 0;
  }

  .research-heading {
    position: static;
  }

  .collaboration-inner {
    grid-template-columns: 1fr;
    gap: 35px;
  }

  .strength-item {
    grid-template-columns: 70px minmax(0, 1fr);
  }

  .strength-en {
    display: none;
  }

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

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

@media (max-width: 680px) {
  body {
    font-size: 15px;
  }

  .container,
  .narrow-container {
    width: min(calc(100% - 30px), var(--max-width));
  }

  .brand-mark {
    width: 39px;
    height: 39px;
    font-size: 17px;
  }

  .brand-copy strong {
    font-size: 11px;
    letter-spacing: 0.07em;
  }

  .hero-inner {
    min-height: 690px;
    padding-top: calc(var(--header-height) + 50px);
    padding-bottom: 46px;
  }

  .hero h1 {
    font-size: 32px;
    line-height: 1.45;
  }

  .hero h1 .hero-line {
    white-space: nowrap;
  }

  .hero-lead {
    font-size: 14px;
    line-height: 1.95;
  }

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

  .button {
    width: 100%;
  }

  .hero-visual {
    right: -240px;
    bottom: 90px;
    width: 500px;
  }

  .focus-strip {
    grid-template-columns: 1fr;
  }

  .focus-strip > div {
    min-height: 87px;
    border-right: 0;
    border-bottom: 1px solid rgba(255, 255, 255, 0.11);
  }

  .focus-strip > div:last-child {
    border-bottom: 0;
  }

  .section {
    padding: 78px 0;
  }

  .section-heading h2 {
    font-size: 31px;
  }

  .heading-row {
    display: block;
    margin-bottom: 38px;
  }

  .heading-note {
    margin-top: 20px;
  }

  .about-copy .lead-copy {
    font-size: 19px;
  }

  .about-principle {
    padding: 23px 21px;
  }

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

  .service-card {
    min-height: auto;
    padding: 32px 25px 35px;
  }

  .service-top {
    margin-bottom: 31px;
  }

  .strength-item {
    padding: 28px 0;
    grid-template-columns: 1fr;
    gap: 18px;
  }

  .strength-index {
    width: 43px;
    height: 43px;
  }

  .strength-item h3 {
    font-size: 19px;
  }

  .research-item {
    padding: 25px 22px;
    grid-template-columns: 42px 1fr;
  }

  .research-item h3 {
    font-size: 17px;
  }

  .collaboration-section {
    padding: 75px 0;
  }

  .collaboration-section h2 {
    font-size: 31px;
  }

  .company-table th,
  .company-table td {
    display: block;
    width: 100%;
    padding: 0;
    border: 0;
  }

  .company-table tr {
    display: block;
    padding: 20px 2px;
    border-bottom: 1px solid var(--line);
  }

  .company-table th {
    margin-bottom: 7px;
  }

  .contact-mail {
    grid-template-columns: 1fr 22px;
  }

  .contact-mail small {
    grid-column: 1 / -1;
  }

  .contact-mail strong {
    font-size: 17px;
  }

  .footer-links {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
  }

  .subpage-back {
    font-size: 9px;
  }

  .subpage-hero {
    padding: 150px 0 65px;
  }

  .privacy-content {
    padding: 70px 0 90px;
  }
}

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

  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    scroll-behavior: auto !important;
    transition-duration: 0.01ms !important;
  }

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

/* 404 */
.error-page {
  color: var(--white);
  background: var(--navy);
}

.error-main {
  position: relative;
  display: grid;
  min-height: 100vh;
  overflow: hidden;
  place-items: center;
  background: radial-gradient(circle at 75% 25%, rgba(54, 224, 194, 0.13), transparent 36%), var(--navy);
}

.error-grid {
  position: absolute;
  inset: 0;
  opacity: 0.12;
  background-image:
    linear-gradient(rgba(255, 255, 255, 0.12) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255, 255, 255, 0.12) 1px, transparent 1px);
  background-size: 80px 80px;
}

.error-content {
  position: relative;
  z-index: 1;
  padding-block: 70px;
}

.error-code {
  margin: 90px 0 5px;
  color: var(--accent);
  font-family: var(--font-en);
  font-size: clamp(82px, 16vw, 170px);
  font-weight: 800;
  line-height: 1;
  letter-spacing: -0.06em;
}

.error-content h1 {
  margin-bottom: 16px;
  font-size: clamp(27px, 4vw, 43px);
  font-weight: 620;
}

.error-content > p:not(.error-code) {
  margin-bottom: 32px;
  color: rgba(255, 255, 255, 0.58);
}

.error-content .button {
  width: fit-content;
}