:root {
  --background: #ffffff;
  --surface: #f5f8fb;
  --surface-strong: #eaf0f5;
  --text: #0c2237;
  --muted: #5a6a79;
  --border: #d7e0e8;
  --accent: #183852;
  --accent-dark: #0a2238;
  --teal: #2c8b93;
  --max: 1280px;
  --header-height: 92px;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  background: var(--background);
  color: var(--text);
  font-family: -apple-system, BlinkMacSystemFont, "Hiragino Sans", "Yu Gothic", "YuGothic", "Meiryo", sans-serif;
  font-size: 16px;
  line-height: 1.75;
  overflow-x: hidden;
}

body.menu-open {
  overflow: hidden;
}

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

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

a:focus-visible,
button:focus-visible {
  outline: 2px solid var(--teal);
  outline-offset: 4px;
}

.skip-link {
  position: fixed;
  left: 16px;
  top: 12px;
  z-index: 100;
  transform: translateY(-160%);
  background: var(--accent);
  color: white;
  padding: 10px 14px;
}

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

.site-header {
  position: sticky;
  top: 0;
  z-index: 20;
  min-height: var(--header-height);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 32px;
  padding: 16px clamp(24px, 4.4vw, 72px);
  border-bottom: 1px solid var(--border);
  background: rgba(255, 255, 255, 0.94);
  backdrop-filter: blur(14px);
}

.brand {
  flex: 0 0 auto;
}

.brand img {
  width: clamp(230px, 22vw, 340px);
  height: auto;
}

.site-nav {
  display: flex;
  align-items: center;
  justify-content: flex-end;
  gap: clamp(18px, 2vw, 32px);
  color: var(--text);
  font-size: 14px;
  font-weight: 700;
  white-space: nowrap;
}

.site-nav a {
  position: relative;
  padding: 8px 0;
}

.site-nav a::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  height: 1px;
  transform: scaleX(0);
  transform-origin: left;
  background: var(--accent);
  transition: transform 180ms ease;
}

.site-nav a:hover::after,
.site-nav a:focus-visible::after {
  transform: scaleX(1);
}

.site-nav .nav-contact {
  min-height: 48px;
  display: inline-flex;
  align-items: center;
  padding: 0 22px;
  background: var(--accent);
  color: white;
}

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

.menu-button {
  display: none;
  align-items: center;
  gap: 8px;
  border: 1px solid var(--border);
  background: white;
  color: var(--text);
  min-height: 44px;
  padding: 0 12px;
  font: inherit;
  font-size: 12px;
  font-weight: 700;
  cursor: pointer;
}

.menu-button span {
  display: block;
  width: 18px;
  height: 2px;
  background: var(--accent);
}

.menu-button b {
  font-size: 12px;
}

.mobile-only-break {
  display: none;
}

.section {
  padding: clamp(72px, 9vw, 128px) clamp(22px, 4.5vw, 72px);
}

.section-inner {
  width: min(100%, var(--max));
  margin: 0 auto;
}

.hero {
  min-height: calc(100vh - var(--header-height));
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(360px, 1fr);
  align-items: center;
  gap: clamp(44px, 7vw, 96px);
  padding-top: clamp(72px, 9vw, 116px);
  border-bottom: 1px solid var(--border);
}

.hero-copy {
  max-width: 690px;
  min-width: 0;
}

.eyebrow {
  margin: 0 0 20px;
  color: var(--accent);
  font-size: 12px;
  font-weight: 800;
  letter-spacing: 0;
  text-transform: uppercase;
}

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

h1 {
  margin-bottom: 28px;
  font-size: clamp(40px, 3.6vw, 52px);
  font-weight: 500;
  line-height: 1.25;
  letter-spacing: 0;
}

h2 {
  margin-bottom: 22px;
  font-size: clamp(30px, 3.1vw, 48px);
  font-weight: 650;
  line-height: 1.35;
  letter-spacing: 0;
}

h3 {
  margin-bottom: 10px;
  font-size: 18px;
  line-height: 1.45;
  letter-spacing: 0;
}

.hero-lead {
  max-width: 680px;
  margin-bottom: 34px;
  color: var(--muted);
  font-size: 19px;
  line-height: 2;
  overflow-wrap: anywhere;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
}

.rule-link {
  min-height: 48px;
  display: inline-flex;
  align-items: center;
  gap: 34px;
  padding: 0 22px;
  border: 1px solid var(--accent);
  color: var(--text);
  font-weight: 700;
  transition: background 180ms ease, color 180ms ease;
}

.rule-link::after {
  content: "";
  width: 28px;
  height: 1px;
  background: currentColor;
}

.rule-link:hover {
  background: var(--accent);
  color: white;
}

.rule-link.secondary {
  border-color: var(--border);
}

.hero-mark {
  position: relative;
  min-height: 520px;
  overflow: hidden;
}

.hero-mark img {
  position: absolute;
  width: min(540px, 42vw);
  max-width: none;
  right: 0;
  top: 50%;
  transform: translateY(-50%);
}

.role-band,
.process-section,
.materials-section {
  background: linear-gradient(180deg, var(--surface), #ffffff);
  border-bottom: 1px solid var(--border);
}

.role-band {
  padding: clamp(72px, 8vw, 112px) clamp(22px, 4.5vw, 72px);
}

.role-layout {
  display: grid;
  grid-template-columns: minmax(280px, 0.72fr) minmax(0, 1.28fr);
  gap: clamp(44px, 7vw, 92px);
  align-items: start;
}

.section-heading {
  max-width: 520px;
}

.section-heading.wide {
  max-width: 850px;
}

.section-heading p,
.split-intro > p,
.contact-layout p {
  color: var(--muted);
  overflow-wrap: anywhere;
}

.role-columns {
  display: grid;
  grid-template-columns: repeat(5, minmax(0, 1fr));
  border-left: 1px solid var(--border);
}

.role-item {
  min-width: 0;
  padding: 20px 24px 10px;
  border-right: 1px solid var(--border);
  text-align: center;
}

.role-item p {
  margin-bottom: 0;
  color: var(--muted);
  font-size: 13px;
  line-height: 1.85;
}

.line-icon {
  width: 56px;
  height: 52px;
  margin: 0 auto 18px;
  display: grid;
  align-content: center;
  gap: 7px;
}

.line-icon span {
  display: block;
  height: 4px;
  background: var(--accent);
}

.line-icon span:nth-child(1) { width: 44px; }
.line-icon span:nth-child(2) { width: 32px; }
.line-icon span:nth-child(3) { width: 48px; }

.line-icon.people span:nth-child(1) { width: 24px; margin-left: 12px; }
.line-icon.people span:nth-child(2) { width: 48px; }
.line-icon.people span:nth-child(3) { width: 34px; margin-left: 8px; }

.line-icon.globe span:nth-child(1) { width: 48px; }
.line-icon.globe span:nth-child(2) { width: 24px; margin-left: 16px; }
.line-icon.globe span:nth-child(3) { width: 48px; }

.line-icon.shield span:nth-child(1) { width: 38px; margin-left: 7px; }
.line-icon.shield span:nth-child(2) { width: 50px; }
.line-icon.shield span:nth-child(3) { width: 26px; margin-left: 14px; }

.line-icon.node span:nth-child(1) { width: 20px; margin-left: 18px; }
.line-icon.node span:nth-child(2) { width: 44px; margin-left: 4px; }
.line-icon.node span:nth-child(3) { width: 32px; margin-left: 12px; }

.split-intro {
  display: grid;
  grid-template-columns: minmax(0, 0.95fr) minmax(280px, 0.65fr);
  gap: 48px;
  align-items: end;
  margin-bottom: 36px;
}

.split-intro.no-side-copy {
  grid-template-columns: minmax(0, 0.95fr);
}

.field-grid,
.principle-grid,
.business-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  border-top: 1px solid var(--border);
  border-left: 1px solid var(--border);
}

.field-grid article,
.principle-grid article,
.business-grid article {
  min-width: 0;
  padding: 28px;
  border-right: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
  background: white;
}

.field-grid span,
.business-grid span {
  display: inline-block;
  margin-bottom: 18px;
  color: var(--teal);
  font-weight: 800;
  font-size: 13px;
}

.field-grid p,
.principle-grid p,
.business-grid p {
  margin-bottom: 0;
  color: var(--muted);
  font-size: 14px;
}

.business-section {
  background: linear-gradient(180deg, #ffffff, var(--surface));
  border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
}

.business-grid {
  grid-template-columns: repeat(3, minmax(0, 1fr));
}

.capability-tree {
  display: grid;
  grid-template-columns: minmax(260px, 0.58fr) minmax(0, 1.42fr);
  gap: clamp(36px, 5vw, 72px);
  margin-top: 54px;
  padding-top: 40px;
  border-top: 1px solid var(--border);
}

.tree-root {
  min-width: 0;
}

.tree-root p:last-child {
  color: var(--muted);
}

.tree-columns {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 0;
  border-top: 1px solid var(--border);
  border-left: 1px solid var(--border);
  background: white;
}

.tree-columns > div {
  min-width: 0;
  padding: 24px;
  border-right: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
}

.tree-columns h4 {
  margin: 0 0 18px;
  color: var(--accent);
  font-size: 15px;
  line-height: 1.6;
}

.tree-columns ul {
  margin: 0;
  padding-left: 1.1em;
  color: var(--muted);
  font-size: 13px;
  line-height: 1.85;
}

.tree-columns li + li {
  margin-top: 8px;
}

.process {
  list-style: none;
  display: grid;
  grid-template-columns: repeat(5, minmax(0, 1fr));
  gap: 0;
  padding: 42px 0 0;
  margin: 0;
  counter-reset: process;
}

.process li {
  position: relative;
  min-width: 0;
  padding: 0 24px 24px 0;
}

.process li::before {
  content: "";
  display: block;
  height: 12px;
  margin: 0 22px 28px 0;
  background: var(--accent);
}

.process li:not(:last-child)::after {
  content: "";
  position: absolute;
  top: 5px;
  right: 16px;
  width: 28px;
  height: 1px;
  background: var(--teal);
}

.process-number {
  color: var(--teal);
  font-size: 22px;
  font-weight: 800;
}

.process p {
  color: var(--muted);
  font-size: 14px;
  margin-bottom: 0;
}

.reimei-section {
  background: var(--accent-dark);
  color: white;
}

.reimei-section .eyebrow,
.reimei-section .section-heading p {
  color: #d4e3ee;
}

.reimei-layout {
  display: grid;
  grid-template-columns: minmax(360px, 0.95fr) minmax(0, 1.05fr);
  gap: clamp(44px, 7vw, 96px);
  align-items: center;
}

.reimei-map {
  position: relative;
  min-height: 520px;
  border: 1px solid rgba(255, 255, 255, 0.22);
  background:
    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: 78px 78px;
}

.orbit {
  position: absolute;
  display: grid;
  place-items: center;
  text-align: center;
  border: 1px solid rgba(255, 255, 255, 0.28);
  background: rgba(255, 255, 255, 0.08);
  color: white;
}

.orbit.center {
  left: 50%;
  top: 50%;
  width: 210px;
  min-height: 150px;
  transform: translate(-50%, -50%);
  padding: 22px;
}

.orbit.center strong {
  display: block;
  font-size: 20px;
}

.orbit.center span {
  color: #d4e3ee;
  font-size: 12px;
}

.orbit.item {
  min-width: 150px;
  min-height: 54px;
  padding: 10px 14px;
  font-weight: 700;
  font-size: 14px;
}

.item-a { left: 8%; top: 13%; }
.item-b { right: 8%; top: 15%; }
.item-c { left: 7%; bottom: 16%; }
.item-d { right: 6%; bottom: 15%; }
.item-e { left: 50%; bottom: 6%; transform: translateX(-50%); }

.principle-list {
  padding: 0;
  margin: 28px 0 0;
  list-style: none;
}

.principle-list li {
  padding: 14px 0;
  border-top: 1px solid rgba(255, 255, 255, 0.2);
}

.principle-list.compact li {
  color: #eff7fc;
}

.materials-layout {
  display: grid;
  grid-template-columns: minmax(260px, 0.68fr) minmax(0, 1.32fr);
  gap: clamp(40px, 6vw, 80px);
  align-items: start;
}

.materials-table {
  border-top: 1px solid var(--border);
}

.materials-table div {
  display: grid;
  grid-template-columns: 190px minmax(0, 1fr);
  gap: 24px;
  padding: 22px 0;
  border-bottom: 1px solid var(--border);
}

.materials-table span {
  font-weight: 800;
  color: var(--accent);
}

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

.principles-section {
  background: #fff;
}

.principle-grid {
  grid-template-columns: repeat(5, minmax(0, 1fr));
}

.contact-section {
  background: var(--surface);
  border-top: 1px solid var(--border);
}

.contact-layout {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 32px;
}

.contact-layout > div {
  max-width: 720px;
}

.contact-button {
  min-height: 56px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0 30px;
  background: var(--accent);
  color: white;
  font-weight: 800;
  white-space: nowrap;
}

.company-section {
  background: #fff;
  border-top: 1px solid var(--border);
}

.company-layout {
  display: grid;
  grid-template-columns: minmax(280px, 0.65fr) minmax(0, 1.35fr);
  gap: clamp(40px, 6vw, 84px);
  align-items: start;
}

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

.company-list div {
  display: grid;
  grid-template-columns: 132px minmax(0, 1fr);
  gap: 22px;
  padding: 20px 0;
  border-bottom: 1px solid var(--border);
}

.company-list dt {
  color: var(--muted);
  font-size: 13px;
  font-weight: 800;
}

.company-list dd {
  margin: 0;
  font-weight: 700;
  overflow-wrap: anywhere;
}

.map-panel {
  min-width: 0;
  border: 1px solid var(--border);
  background: var(--surface);
}

.map-panel iframe {
  display: block;
  width: 100%;
  min-height: 420px;
  border: 0;
}

.site-footer {
  padding: 40px clamp(22px, 4.5vw, 72px);
  border-top: 1px solid var(--border);
  background: #ffffff;
  color: var(--muted);
}

.footer-inner {
  width: min(100%, var(--max));
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
}

.footer-inner img {
  width: 250px;
  opacity: 0.96;
}

.footer-inner p {
  margin: 0;
  font-size: 13px;
}

@media (max-width: 1160px) {
  .site-nav {
    gap: 18px;
    font-size: 13px;
  }

  .role-columns {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .field-grid,
  .principle-grid,
  .business-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

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

  .process {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    row-gap: 28px;
  }

  .process li::after {
    display: none;
  }
}

@media (max-width: 880px) {
  :root {
    --header-height: 82px;
  }

  .site-header {
    padding: 18px 22px;
    gap: 16px;
  }

  .menu-button {
    display: inline-flex;
    flex-direction: column;
    justify-content: center;
    position: fixed;
    right: 22px;
    top: 18px;
    z-index: 60;
    width: 48px;
    padding: 0;
    gap: 4px;
    border-color: var(--accent);
    background: var(--accent);
  }

  .menu-button b {
    display: none;
  }

  .menu-button span {
    background: white;
  }

  .site-nav {
    position: fixed;
    left: 0;
    right: 0;
    top: var(--header-height);
    display: none;
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    padding: 12px 22px 26px;
    background: white;
    border-bottom: 1px solid var(--border);
    box-shadow: 0 24px 40px rgba(12, 34, 55, 0.1);
  }

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

  .site-nav a {
    padding: 14px 0;
    border-bottom: 1px solid var(--border);
  }

  .site-nav .nav-contact {
    margin-top: 14px;
    justify-content: center;
    border-bottom: 0;
  }

  .hero,
  .role-layout,
  .split-intro,
  .reimei-layout,
  .materials-layout,
  .company-layout {
    grid-template-columns: 1fr;
  }

  .hero {
    min-height: auto;
  }

  .hero-mark {
    min-height: 400px;
  }

  .hero-mark img {
    width: min(400px, 80vw);
    right: 0;
  }

  .contact-layout,
  .footer-inner {
    align-items: flex-start;
    flex-direction: column;
  }
}

@media (max-width: 640px) {
  .site-header {
    padding: 16px 14px;
  }

  .menu-button {
    right: 14px;
    top: 16px;
  }

  .brand img {
    width: min(212px, 62vw);
  }

  h1 {
    font-size: 33px;
  }

  h2 {
    font-size: 25px;
  }

  .mobile-only-break {
    display: block;
  }

  .hero-lead {
    font-size: 16px;
    line-height: 1.9;
    word-break: break-all;
  }

  .hero-lead,
  .hero-copy,
  .hero-actions,
  .section-heading,
  .split-intro,
  .role-item,
  .field-grid article,
  .business-grid article,
  .principle-grid article,
  .materials-table,
  .capability-tree,
  .tree-root,
  .tree-columns,
  .tree-columns > div,
  .contact-layout > div,
  .company-info,
  .company-list,
  .map-panel {
    width: 100%;
    max-width: 276px;
  }

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

  .rule-link {
    width: 100%;
    justify-content: space-between;
  }

  .hero-mark {
    min-height: 300px;
    width: 100%;
    max-width: 276px;
    overflow: hidden;
  }

  .hero-mark img {
    width: 276px;
    right: 0;
  }

  .section-heading p,
  .split-intro > p,
  .field-grid p,
  .business-grid p,
  .role-item p,
  .materials-table p,
  .tree-columns,
  .tree-columns p,
  .tree-columns li,
  .contact-layout p {
    word-break: break-all;
  }

  .role-columns,
  .field-grid,
  .business-grid,
  .principle-grid,
  .process {
    grid-template-columns: 1fr;
  }

  .role-columns {
    border-top: 1px solid var(--border);
  }

  .role-item {
    text-align: left;
    border-bottom: 1px solid var(--border);
  }

  .line-icon {
    margin-left: 0;
  }

  .materials-table div {
    grid-template-columns: 1fr;
    gap: 6px;
  }

  .company-list div {
    grid-template-columns: 1fr;
    gap: 6px;
  }

  .map-panel iframe {
    min-height: 320px;
  }

  .reimei-map {
    min-height: 620px;
  }

  .orbit.center {
    width: 190px;
  }

  .orbit.item {
    min-width: 132px;
    font-size: 12px;
  }

  .item-a { left: 5%; top: 8%; }
  .item-b { right: 5%; top: 20%; }
  .item-c { left: 5%; bottom: 24%; }
  .item-d { right: 5%; bottom: 12%; }
  .item-e { bottom: 3%; }
}

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