:root {
  --ink: #171a1e;
  --navy: #14375a;
  --deep: #172128;
  --dark: #12191d;
  --gold: #b99a68;
  --line: #d8d3ca;
  --paper: #f7f5f1;
  --white: #ffffff;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  color: var(--ink);
  background: var(--paper);
  font-family: "Yu Mincho", "Hiragino Mincho ProN", "Times New Roman", serif;
  line-height: 1.8;
  letter-spacing: 0;
}

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

.site-header {
  position: sticky;
  top: 0;
  z-index: 20;
  display: grid;
  grid-template-columns: minmax(250px, 1fr) 190px 74px;
  align-items: stretch;
  height: 74px;
  background: rgba(250, 249, 247, 0.96);
  border-bottom: 1px solid rgba(35, 32, 28, 0.08);
}

.nav-toggle {
  position: absolute;
  width: 1px;
  height: 1px;
  opacity: 0;
  pointer-events: none;
}

.menu-button {
  position: relative;
  z-index: 32;
  grid-column: 3;
  grid-row: 1;
  display: grid;
  place-items: center;
  width: 74px;
  height: 74px;
  cursor: pointer;
  border-left: 1px solid rgba(35, 32, 28, 0.08);
}

.menu-button span {
  grid-area: 1 / 1;
  width: 25px;
  height: 1px;
  background: var(--ink);
  transition: transform 0.24s ease, opacity 0.18s ease;
}

.menu-button span:nth-child(1) {
  transform: translateY(-8px);
}

.menu-button span:nth-child(3) {
  transform: translateY(8px);
}

.nav-toggle:checked + .menu-button span:nth-child(1) {
  transform: rotate(38deg);
}

.nav-toggle:checked + .menu-button span:nth-child(2) {
  opacity: 0;
}

.nav-toggle:checked + .menu-button span:nth-child(3) {
  transform: rotate(-38deg);
}

.brand {
  grid-column: 1;
  grid-row: 1;
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 0 34px;
  font-size: 16px;
  white-space: nowrap;
}

.brand strong {
  font-size: 18px;
  font-weight: 500;
  letter-spacing: 0.24em;
}

.global-nav {
  position: fixed;
  top: 74px;
  right: 0;
  z-index: 31;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: flex-start;
  gap: 0;
  width: min(390px, calc(100vw - 64px));
  height: calc(100vh - 74px);
  padding: 34px 46px;
  color: var(--ink);
  background: rgba(250, 249, 247, 0.98);
  border-left: 1px solid rgba(35, 32, 28, 0.12);
  box-shadow: -28px 0 60px rgba(19, 25, 28, 0.16);
  font-size: 13px;
  white-space: nowrap;
  transform: translateX(102%);
  transition: transform 0.28s ease;
}

.global-nav a {
  position: relative;
  display: inline-flex;
  align-items: center;
  justify-content: space-between;
  width: 100%;
  min-height: 58px;
  border-bottom: 1px solid rgba(35, 32, 28, 0.1);
  font-size: 15px;
}

.global-nav a::after {
  position: absolute;
  right: 0;
  left: auto;
  bottom: 18px;
  width: 0;
  height: 1px;
  content: "";
  background: var(--ink);
  transition: width 0.2s ease;
}

.global-nav a:hover::after,
.global-nav .is-current::after {
  width: 38px;
}

.nav-toggle:checked ~ .global-nav {
  transform: translateX(0);
}

.nav-backdrop {
  position: fixed;
  inset: 74px 0 0;
  z-index: 30;
  pointer-events: none;
  background: rgba(18, 25, 29, 0);
  opacity: 0;
  transition: opacity 0.24s ease, background 0.24s ease;
}

.nav-toggle:checked ~ .nav-backdrop {
  pointer-events: auto;
  background: rgba(18, 25, 29, 0.34);
  opacity: 1;
}

.header-contact {
  grid-column: 2;
  grid-row: 1;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 12px;
  color: var(--white);
  background: #161d21;
  font-size: 13px;
}

.header-contact:hover,
.header-contact.is-contact-current {
  background: #0f171b;
}

svg {
  fill: none;
  stroke: currentColor;
  stroke-width: 1.7;
  stroke-linecap: round;
  stroke-linejoin: round;
}

.header-contact svg {
  width: 18px;
  height: 18px;
}

.hero {
  position: relative;
  display: grid;
  grid-template-columns: minmax(520px, 50.5%) 1fr;
  min-height: 397px;
  overflow: hidden;
  background:
    linear-gradient(90deg, rgba(250, 248, 244, 0.98) 0%, rgba(250, 248, 244, 0.98) 44%, rgba(250, 248, 244, 0.2) 61%),
    var(--paper);
}

.hero-copy {
  position: relative;
  z-index: 2;
  display: flex;
  align-items: center;
  padding: 58px 7vw 62px 8.6vw;
}

.copy-rule {
  position: relative;
  padding-left: 24px;
}

.copy-rule::before {
  position: absolute;
  top: 3px;
  left: 0;
  width: 1px;
  height: 210px;
  content: "";
  background: #bfb8ad;
}

.eyebrow,
.section-en {
  margin: 0 0 12px;
  color: var(--gold);
  font-size: 13px;
  letter-spacing: 0.42em;
  line-height: 1.4;
}

.hero h1 {
  margin: 0 0 24px;
  font-size: clamp(34px, 4.1vw, 58px);
  font-weight: 400;
  line-height: 1.35;
}

.lead {
  margin: 0 0 20px;
  font-size: 14px;
}

.founded {
  position: relative;
  display: inline-block;
  margin: 0;
  padding-bottom: 6px;
  color: #4f4a43;
  font-size: 13px;
  letter-spacing: 0.08em;
}

.founded::after {
  position: absolute;
  left: 0;
  bottom: 0;
  width: 104px;
  height: 1px;
  content: "";
  background: var(--gold);
}

.hero-image {
  position: absolute;
  inset: 0 0 0 auto;
  width: 50.3%;
  background: url("assets/hero-office.png") center / cover no-repeat;
}

.side-label {
  position: absolute;
  z-index: 3;
  writing-mode: vertical-rl;
  color: #222;
  font-size: 11px;
  letter-spacing: 0.22em;
  line-height: 1;
}

.hero-scroll {
  left: 25px;
  bottom: 50px;
}

.hero-scroll::after {
  display: block;
  width: 1px;
  height: 62px;
  margin: 25px auto 0;
  content: "";
  background: #8f8a82;
}

.services {
  position: relative;
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  min-height: 238px;
  background: #fbfaf8;
  border-top: 1px solid rgba(33, 33, 33, 0.08);
  border-bottom: 1px solid rgba(33, 33, 33, 0.08);
}

.services-label {
  left: 24px;
  top: 70px;
}

.services-label::before {
  display: block;
  width: 1px;
  height: 58px;
  margin: 0 auto 28px;
  content: "";
  background: #bfb8ad;
}

.service-card {
  min-height: 238px;
  padding: 34px clamp(28px, 4vw, 76px);
}

.service-card + .service-card {
  border-left: 1px solid #cfc7bc;
}

.service-inner {
  max-width: 420px;
  margin: 0 auto;
}

.service-icon {
  width: 48px;
  height: 48px;
  color: var(--navy);
  margin-bottom: 8px;
}

.service-kicker {
  margin: 0 0 4px;
  color: #6d6a66;
  font-size: 12px;
}

.service-card h3 {
  margin: 0 0 13px;
  font-size: clamp(22px, 2vw, 28px);
  font-weight: 400;
  line-height: 1.35;
}

.service-card p:not(.service-kicker) {
  margin: 0 0 15px;
  color: #55504a;
  font-size: 13px;
}

.text-link,
.about-link {
  position: relative;
  display: inline-flex;
  align-items: center;
  gap: 18px;
  padding-bottom: 5px;
  font-size: 13px;
}

.text-link::after,
.about-link::after,
.cta-button::after {
  content: "→";
  color: var(--gold);
  font-size: 20px;
  line-height: 1;
}

.text-link::before,
.about-link::before {
  position: absolute;
  left: 0;
  bottom: 0;
  width: 100%;
  height: 1px;
  content: "";
  background: var(--gold);
}

.about-company {
  display: grid;
  grid-template-columns: 55% 45%;
  min-height: 264px;
}

.about-panel {
  position: relative;
  display: flex;
  align-items: center;
  min-height: 264px;
  color: var(--white);
  background:
    linear-gradient(90deg, rgba(16, 20, 22, 0.68), rgba(16, 20, 22, 0.38)),
    url("assets/about-office.png") center / cover no-repeat;
}

.about-panel::before {
  position: absolute;
  inset: 0;
  content: "";
  background: linear-gradient(90deg, rgba(0, 0, 0, 0.12), rgba(0, 0, 0, 0.18));
}

.about-content {
  position: relative;
  z-index: 1;
  max-width: 620px;
  padding: 34px 48px 34px 8.8vw;
}

.about-content h2 {
  margin: 0 0 13px;
  font-size: clamp(24px, 2.7vw, 34px);
  font-weight: 400;
  line-height: 1.55;
}

.about-content p:not(.section-en) {
  margin: 0 0 15px;
  font-size: 13px;
}

.about-link {
  color: var(--white);
}

.company-panel {
  display: flex;
  align-items: center;
  min-height: 264px;
  padding: 30px clamp(44px, 6vw, 88px);
  color: var(--white);
  background:
    radial-gradient(circle at 100% 15%, rgba(70, 88, 90, 0.22), transparent 38%),
    linear-gradient(135deg, #172025, #111719 70%);
}

.company-list {
  width: 100%;
  margin: 0;
}

.company-list div {
  display: grid;
  grid-template-columns: 150px 1fr;
  align-items: center;
  min-height: 58px;
  border-bottom: 1px solid rgba(255, 255, 255, 0.22);
}

.company-list dt {
  display: flex;
  align-items: center;
  gap: 18px;
  color: rgba(255, 255, 255, 0.86);
  font-size: 13px;
}

.company-list dd {
  margin: 0;
  font-size: 13px;
}

.company-list svg {
  width: 23px;
  height: 23px;
  color: rgba(255, 255, 255, 0.9);
}

.contact-cta {
  display: grid;
  grid-template-columns: 72px minmax(320px, 1fr) 244px;
  align-items: center;
  gap: 34px;
  min-height: 107px;
  padding: 22px 13.8vw 22px 18.2vw;
  color: var(--white);
  background:
    linear-gradient(115deg, rgba(16, 51, 83, 0.97), rgba(31, 66, 96, 0.95)),
    #17395d;
}

.cta-icon {
  display: grid;
  place-items: center;
  width: 72px;
  height: 72px;
  border: 1px solid var(--gold);
  border-radius: 50%;
}

.cta-icon svg {
  width: 34px;
  height: 34px;
}

.cta-text h2 {
  margin: 0 0 4px;
  font-size: 21px;
  font-weight: 400;
  line-height: 1.45;
}

.cta-text p {
  margin: 0;
  font-size: 13px;
  color: rgba(255, 255, 255, 0.82);
}

.cta-button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 18px;
  min-height: 54px;
  border: 1px solid rgba(255, 255, 255, 0.75);
  font-size: 13px;
}

.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;
}

.page-hero {
  position: relative;
  min-height: 300px;
  padding: 82px 8.6vw 74px;
  overflow: hidden;
  background:
    linear-gradient(90deg, rgba(248, 246, 241, 0.98), rgba(248, 246, 241, 0.88) 48%, rgba(248, 246, 241, 0.45)),
    url("assets/hero-office.png") right center / 52% auto no-repeat,
    var(--paper);
  border-bottom: 1px solid rgba(33, 33, 33, 0.09);
}

.page-hero::before {
  position: absolute;
  left: 7vw;
  top: 82px;
  width: 1px;
  height: 158px;
  content: "";
  background: #bfb8ad;
}

.page-hero > * {
  position: relative;
  z-index: 1;
  max-width: 620px;
  margin-left: 24px;
}

.page-hero h1 {
  margin: 0 0 18px;
  font-size: clamp(34px, 4vw, 54px);
  font-weight: 400;
  line-height: 1.35;
}

.page-hero p:last-child {
  margin-top: 0;
  font-size: 14px;
}

.split-section {
  display: grid;
  grid-template-columns: minmax(260px, 38%) 1fr;
  gap: clamp(34px, 7vw, 96px);
  padding: 72px 8.6vw;
  background: #fbfaf8;
  border-bottom: 1px solid rgba(33, 33, 33, 0.08);
}

.split-section h2,
.service-detail h2,
.archive-grid h2,
.news-list h2,
.values-section h3 {
  margin: 0;
  font-weight: 400;
  line-height: 1.55;
}

.split-section h2 {
  font-size: clamp(25px, 2.8vw, 38px);
}

.body-copy p {
  margin: 0 0 18px;
  color: #514d47;
  font-size: 14px;
}

.values-section,
.archive-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  background: #f6f3ee;
}

.values-section article,
.archive-grid article {
  min-height: 230px;
  padding: 46px clamp(28px, 4.5vw, 74px);
  border-top: 1px solid rgba(33, 33, 33, 0.08);
}

.values-section article + article,
.archive-grid article + article {
  border-left: 1px solid #cfc7bc;
}

.values-section span,
.archive-grid span {
  display: inline-block;
  margin-bottom: 18px;
  color: var(--gold);
  font-size: 13px;
  letter-spacing: 0.18em;
}

.values-section h3,
.archive-grid h2 {
  margin-bottom: 12px;
  font-size: clamp(21px, 2vw, 28px);
}

.values-section p,
.archive-grid p {
  margin: 0;
  color: #55504a;
  font-size: 13px;
}

.service-detail-list {
  background: #fbfaf8;
}

.service-detail {
  display: grid;
  grid-template-columns: minmax(220px, 31%) 1fr;
  gap: clamp(28px, 6vw, 84px);
  padding: 58px 8.6vw;
  border-bottom: 1px solid #d5cec4;
}

.service-detail h2 {
  grid-column: 1;
  font-size: clamp(26px, 3vw, 40px);
}

.service-detail p:not(.section-en) {
  grid-column: 2;
  grid-row: 1 / span 2;
  align-self: center;
  margin: 0;
  color: #514d47;
  font-size: 14px;
}

.news-list {
  padding: 42px 8.6vw 80px;
  background: #fbfaf8;
}

.news-list article {
  display: grid;
  grid-template-columns: 150px 1fr;
  gap: 24px;
  align-items: center;
  padding: 24px 0;
  border-bottom: 1px solid #d5cec4;
}

.news-list time {
  color: var(--gold);
  font-size: 13px;
  letter-spacing: 0.08em;
}

.news-list h2 {
  font-size: 18px;
}

.contact-form-section {
  padding: 64px 8.6vw 86px;
  background: #fbfaf8;
}

.contact-form {
  max-width: 850px;
  margin: 0 auto;
}

.contact-form label {
  display: grid;
  grid-template-columns: 180px 1fr;
  gap: 28px;
  align-items: start;
  padding: 18px 0;
  border-bottom: 1px solid #d5cec4;
  color: #3f3b36;
  font-size: 14px;
}

.contact-form input,
.contact-form select,
.contact-form textarea {
  width: 100%;
  border: 1px solid #cfc7bc;
  background: #fff;
  padding: 12px 14px;
  color: var(--ink);
  font: inherit;
}

.contact-form textarea {
  resize: vertical;
}

.contact-form button {
  display: block;
  min-width: 220px;
  min-height: 54px;
  margin: 34px 0 0 auto;
  border: 1px solid var(--navy);
  color: #fff;
  background: var(--navy);
  font: inherit;
  cursor: pointer;
}

.detail-section {
  padding: 70px 8.6vw;
  background: #fbfaf8;
  border-bottom: 1px solid rgba(33, 33, 33, 0.08);
}

.detail-section > h2,
.process-section > h2,
.contact-lead-section h2 {
  margin: 0 0 30px;
  font-size: clamp(25px, 2.8vw, 38px);
  font-weight: 400;
  line-height: 1.55;
}

.info-table {
  max-width: 920px;
  margin: 0;
  border-top: 1px solid #d5cec4;
}

.info-table div {
  display: grid;
  grid-template-columns: 190px 1fr;
  gap: 34px;
  padding: 19px 0;
  border-bottom: 1px solid #d5cec4;
}

.info-table dt {
  color: var(--gold);
  font-size: 13px;
}

.info-table dd {
  margin: 0;
  color: #47433e;
  font-size: 14px;
}

.feature-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  border-top: 1px solid #d5cec4;
  border-left: 1px solid #d5cec4;
}

.feature-grid article {
  min-height: 185px;
  padding: 28px;
  border-right: 1px solid #d5cec4;
  border-bottom: 1px solid #d5cec4;
}

.feature-grid h3 {
  margin: 0 0 12px;
  font-size: 19px;
  font-weight: 400;
  line-height: 1.55;
}

.feature-grid p {
  margin: 0;
  color: #55504a;
  font-size: 13px;
}

.process-section {
  padding: 70px 8.6vw;
  background: #f6f3ee;
  border-bottom: 1px solid rgba(33, 33, 33, 0.08);
}

.process-section ol {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 0;
  margin: 0;
  padding: 0;
  list-style: none;
  border-top: 1px solid #d5cec4;
  border-left: 1px solid #d5cec4;
}

.process-section li {
  min-height: 190px;
  padding: 28px;
  border-right: 1px solid #d5cec4;
  border-bottom: 1px solid #d5cec4;
}

.process-section span {
  display: block;
  margin-bottom: 16px;
  color: var(--gold);
  font-size: 13px;
  letter-spacing: 0.2em;
}

.process-section strong {
  display: block;
  margin-bottom: 10px;
  font-size: 19px;
  font-weight: 400;
}

.process-section p {
  margin: 0;
  color: #55504a;
  font-size: 13px;
}

.page-contact-band {
  display: grid;
  grid-template-columns: minmax(260px, 1fr) 260px;
  align-items: center;
  gap: 34px;
  padding: 38px 8.6vw;
  color: #fff;
  background:
    linear-gradient(115deg, rgba(16, 51, 83, 0.97), rgba(31, 66, 96, 0.95)),
    #17395d;
}

.page-contact-band p {
  margin: 0;
  font-size: clamp(18px, 2vw, 25px);
  line-height: 1.65;
}

.contact-lead-section {
  display: grid;
  grid-template-columns: minmax(260px, 38%) 1fr;
  gap: clamp(34px, 7vw, 96px);
  padding: 64px 8.6vw;
  background: #fbfaf8;
  border-bottom: 1px solid rgba(33, 33, 33, 0.08);
}

.contact-lead-section ul {
  margin: 0;
  padding: 0;
  list-style: none;
  border-top: 1px solid #d5cec4;
}

.contact-lead-section li {
  position: relative;
  padding: 18px 0 18px 28px;
  border-bottom: 1px solid #d5cec4;
  color: #47433e;
  font-size: 14px;
}

.contact-lead-section li::before {
  position: absolute;
  left: 0;
  top: 26px;
  width: 9px;
  height: 9px;
  content: "";
  border: 1px solid var(--gold);
  transform: rotate(45deg);
}

.mail-note {
  max-width: 850px;
  margin: 18px auto 0;
  color: #6a665f;
  font-size: 12px;
}

@media (max-width: 1080px) {
  .site-header {
    grid-template-columns: 1fr 74px 64px;
  }

  .brand {
    padding: 0 20px;
  }

  .menu-button {
    width: 64px;
    height: 74px;
  }

  .header-contact {
    width: 74px;
  }

  .header-contact span {
    display: none;
  }

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

  .hero-image {
    width: 58%;
    opacity: 0.55;
  }

  .services,
  .about-company,
  .values-section,
  .archive-grid {
    grid-template-columns: 1fr;
  }

  .service-card + .service-card {
    border-left: 0;
    border-top: 1px solid #cfc7bc;
  }

  .contact-cta {
    grid-template-columns: 64px 1fr;
    padding: 24px 7vw;
  }

  .cta-button {
    grid-column: 2;
    width: 244px;
  }

  .page-hero {
    background-size: cover;
  }

  .split-section,
  .service-detail,
  .contact-lead-section {
    grid-template-columns: 1fr;
  }

  .service-detail p:not(.section-en) {
    grid-column: auto;
    grid-row: auto;
  }

  .values-section article + article,
  .archive-grid article + article {
    border-left: 0;
  }

  .feature-grid,
  .process-section ol {
    grid-template-columns: repeat(2, 1fr);
  }

  .page-contact-band {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 680px) {
  .site-header {
    height: 64px;
    grid-template-columns: 1fr 70px 60px;
  }

  .brand {
    padding: 0 10px;
    font-size: 13px;
  }

  .brand strong {
    font-size: 15px;
    letter-spacing: 0.16em;
  }

  .menu-button {
    width: 60px;
    height: 64px;
  }

  .global-nav {
    top: 64px;
    height: calc(100vh - 64px);
    width: min(330px, calc(100vw - 46px));
    padding: 28px 32px;
  }

  .nav-backdrop {
    inset: 64px 0 0;
  }

  .header-contact {
    width: 70px;
  }

  .hero {
    min-height: 520px;
  }

  .hero-copy {
    align-items: flex-end;
    padding: 46px 24px 58px 58px;
  }

  .hero-image {
    inset: 0;
    width: 100%;
    opacity: 0.34;
  }

  .hero h1 {
    font-size: 34px;
  }

  .copy-rule::before {
    height: 250px;
  }

  .services-label,
  .hero-scroll {
    left: 18px;
  }

  .service-card {
    padding: 34px 34px 34px 58px;
  }

  .about-content,
  .company-panel {
    padding: 34px 28px 34px 42px;
  }

  .company-list div {
    grid-template-columns: 1fr;
    gap: 4px;
    padding: 14px 0;
  }

  .contact-cta {
    grid-template-columns: 58px 1fr;
    gap: 18px;
  }

  .cta-icon {
    width: 58px;
    height: 58px;
  }

  .cta-button {
    grid-column: 1 / -1;
    width: 100%;
  }

  .page-hero {
    min-height: 340px;
    padding: 64px 26px 58px 54px;
  }

  .page-hero::before {
    left: 30px;
    top: 64px;
  }

  .page-hero > * {
    margin-left: 0;
  }

  .split-section,
  .service-detail,
  .contact-form-section,
  .contact-lead-section,
  .detail-section,
  .process-section,
  .news-list,
  .page-contact-band {
    padding-left: 30px;
    padding-right: 30px;
  }

  .contact-form label,
  .news-list article,
  .info-table div {
    grid-template-columns: 1fr;
    gap: 8px;
  }

  .feature-grid,
  .process-section ol {
    grid-template-columns: 1fr;
  }
}