:root {
  --bg: #ffffff;
  --bg-soft: #f7f2e8;
  --bg-deep: #fffaf1;
  --gold: #c99a3a;
  --gold-dark: #a77a1e;
  --gold-light: #e8d7b0;
  --navy: #1e2a3a;
  --text: #314055;
  --muted: #66707f;
  --line: rgba(30, 42, 58, 0.1);
  --shadow: 0 22px 60px rgba(28, 22, 10, 0.08);
  --radius-lg: 28px;
  --radius-md: 18px;
  --radius-sm: 12px;
  --container: min(1180px, calc(100% - 40px));
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: "Noto Sans JP", system-ui, -apple-system, BlinkMacSystemFont, sans-serif;
  color: var(--text);
  background: linear-gradient(180deg, #fffefb 0%, #ffffff 32%, #fffdf8 100%);
  line-height: 1.8;
}

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

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

.skip-link {
  position: absolute;
  left: -9999px;
  top: auto;
}

.skip-link:focus {
  left: 16px;
  top: 16px;
  background: #fff;
  border: 2px solid var(--gold);
  border-radius: 999px;
  padding: 10px 14px;
  z-index: 10000;
}

.container {
  width: var(--container);
  margin: 0 auto;
}

.narrow {
  max-width: 980px;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 1000;
  backdrop-filter: blur(16px);
  background: rgba(255, 255, 255, 0.88);
  border-bottom: 1px solid rgba(201, 154, 58, 0.15);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 18px;
  min-height: 84px;
}

.brand {
  display: flex;
  align-items: center;
  gap: 14px;
  min-width: 0;
}

.brand img {
  width: 200px;
  height: auto;
}

.brand span {
  font-size: 0.9rem;
  color: var(--navy);
  font-weight: 700;
  letter-spacing: 0.01em;
}

.global-nav {
  display: flex;
  align-items: center;
  gap: 18px;
}

.global-nav a {
  color: var(--navy);
  font-size: 0.95rem;
  font-weight: 500;
}

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

.nav-cta {
  padding: 12px 18px;
  border-radius: 999px;
  background: linear-gradient(135deg, var(--gold) 0%, #d6b066 100%);
  color: #fff !important;
  box-shadow: 0 12px 24px rgba(201, 154, 58, 0.28);
}

.menu-toggle {
  display: none;
  border: 1px solid rgba(167, 122, 30, 0.18);
  background: #fff;
  color: var(--navy);
  border-radius: 999px;
  padding: 10px 14px;
  font-weight: 700;
}

.hero {
  padding: 72px 0 36px;
  position: relative;
  overflow: hidden;
}

.hero::before,
.hero::after {
  content: "";
  position: absolute;
  border-radius: 50%;
  filter: blur(10px);
  pointer-events: none;
}

.hero::before {
  width: 520px;
  height: 520px;
  top: -200px;
  right: -120px;
  background: radial-gradient(circle, rgba(232, 215, 176, 0.38) 0%, rgba(232, 215, 176, 0) 72%);
}

.hero::after {
  width: 420px;
  height: 420px;
  bottom: -160px;
  left: -160px;
  background: radial-gradient(circle, rgba(201, 154, 58, 0.16) 0%, rgba(201, 154, 58, 0) 70%);
}

.hero-grid {
  display: grid;
  grid-template-columns: minmax(0, 1.08fr) minmax(420px, 0.92fr);
  gap: 44px;
  align-items: center;
}

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  margin: 0 0 14px;
  color: var(--gold-dark);
  font-weight: 800;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  font-size: 0.8rem;
}

.eyebrow::before {
  content: "";
  width: 34px;
  height: 1px;
  background: linear-gradient(90deg, var(--gold), transparent);
}

.hero h1 {
  margin: 0;
  font-size: clamp(2rem, 3.8vw, 4rem);
  line-height: 1.18;
  color: var(--navy);
  letter-spacing: -0.03em;
}

.lead {
  font-size: 1.08rem;
  color: var(--text);
  margin: 22px 0 0;
}

.hero-actions,
.cta-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  margin-top: 28px;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 15px 22px;
  border-radius: 999px;
  font-weight: 800;
  transition: transform 0.25s ease, box-shadow 0.25s ease, background 0.25s ease;
}

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

.btn-primary {
  background: linear-gradient(135deg, var(--gold-dark) 0%, var(--gold) 100%);
  color: #fff;
  box-shadow: 0 18px 32px rgba(201, 154, 58, 0.26);
}

.btn-secondary {
  background: #fff;
  color: var(--navy);
  border: 1px solid rgba(30, 42, 58, 0.12);
}

.btn.full {
  width: 100%;
}

.hero-points {
  list-style: none;
  margin: 24px 0 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 12px;
}

.hero-points li {
  background: rgba(255, 255, 255, 0.86);
  border: 1px solid rgba(201, 154, 58, 0.16);
  border-radius: 16px;
  padding: 14px 16px 14px 42px;
  position: relative;
  box-shadow: var(--shadow);
  font-weight: 500;
}

.hero-points li::before {
  content: "";
  position: absolute;
  width: 12px;
  height: 12px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--gold) 0%, var(--gold-dark) 100%);
  left: 18px;
  top: 22px;
  box-shadow: 0 0 0 6px rgba(201, 154, 58, 0.14);
}

.hero-visual-card {
  position: relative;
  background: linear-gradient(180deg, rgba(255,255,255,0.98) 0%, rgba(247,242,232,0.96) 100%);
  padding: 18px;
  border-radius: 32px;
  border: 1px solid rgba(201, 154, 58, 0.18);
  box-shadow: 0 32px 64px rgba(32, 22, 4, 0.12);
}

.hero-visual {
  width: 100%;
  border-radius: 24px;
}

.hero-kpis {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 12px;
  margin-top: 14px;
}

.hero-kpis div {
  background: #fff;
  border-radius: 20px;
  padding: 14px 14px 12px;
  border: 1px solid rgba(30, 42, 58, 0.08);
}

.hero-kpis strong {
  display: block;
  color: var(--gold-dark);
  font-size: 1.18rem;
}

.hero-kpis span {
  display: block;
  font-size: 0.83rem;
  color: var(--muted);
  line-height: 1.5;
  margin-top: 4px;
}

.trust-strip {
  padding: 0 0 16px;
}

.trust-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 16px;
}

.trust-item {
  background: #fff;
  border: 1px solid rgba(30, 42, 58, 0.08);
  border-radius: 20px;
  padding: 18px 20px;
  box-shadow: var(--shadow);
}

.trust-item span {
  display: block;
  color: var(--muted);
  font-size: 0.82rem;
  margin-bottom: 6px;
}

.trust-item strong {
  color: var(--navy);
  font-size: 1rem;
}

.section {
  padding: 92px 0;
}

.section.alt {
  background: linear-gradient(180deg, rgba(247,242,232,0.55) 0%, rgba(255,255,255,0.96) 100%);
}

.section-heading {
  max-width: 940px;
  margin: 0 auto 36px;
  text-align: center;
}

.section-heading.left {
  margin-left: 0;
  text-align: left;
}

.section-heading h2 {
  margin: 0;
  color: var(--navy);
  font-size: clamp(1.7rem, 2.9vw, 3rem);
  line-height: 1.24;
}

.section-heading p {
  margin: 16px 0 0;
  color: var(--text);
  font-size: 1.02rem;
}

.inline-source {
  color: var(--gold-dark);
  font-weight: 700;
}

.feature-grid,
.insight-grid,
.usecase-grid,
.service-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 20px;
}

.feature-card,
.insight-card,
.usecase-card,
.service-card,
.flow-card,
.kpi-note,
.faq-item,
.related-link,
.source-links a {
  background: rgba(255, 255, 255, 0.92);
  border: 1px solid rgba(30, 42, 58, 0.08);
  border-radius: 24px;
  box-shadow: var(--shadow);
}

.feature-card,
.insight-card,
.usecase-card,
.service-card {
  padding: 26px 24px;
}

.feature-grid .feature-card:first-child {
  grid-column: span 2;
}

.feature-card h3,
.insight-card h3,
.usecase-card h3,
.service-card h3,
.kpi-note h3,
.timeline-item h3,
.flow-card h3,
.faq-question,
.cta-box h2,
.footer-brand,
.related-link {
  color: var(--navy);
}

.feature-card h3,
.insight-card h3,
.usecase-card h3,
.service-card h3,
.timeline-item h3,
.flow-card h3,
.kpi-note h3 {
  margin: 0 0 10px;
  font-size: 1.2rem;
  line-height: 1.45;
}

.feature-card p,
.insight-card p,
.usecase-card p,
.service-card p,
.timeline-item p,
.flow-card p,
.kpi-note p,
.cta-box p,
.footer-grid p {
  margin: 0;
  color: var(--text);
}

.timeline {
  position: relative;
  display: grid;
  gap: 18px;
}

.timeline-item {
  display: grid;
  grid-template-columns: 150px minmax(0, 1fr);
  gap: 22px;
  align-items: start;
  padding: 26px;
  background: rgba(255, 255, 255, 0.94);
  border: 1px solid rgba(30, 42, 58, 0.08);
  border-radius: 24px;
  box-shadow: var(--shadow);
}

.timeline-step {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 48px;
  padding: 10px 16px;
  border-radius: 999px;
  background: linear-gradient(135deg, rgba(201,154,58,0.16) 0%, rgba(201,154,58,0.08) 100%);
  color: var(--gold-dark);
  font-size: 0.88rem;
  font-weight: 800;
}

.flow-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 18px;
}

.flow-card {
  padding: 24px 22px;
  position: relative;
  overflow: hidden;
}

.flow-card span {
  display: inline-flex;
  width: 46px;
  height: 46px;
  align-items: center;
  justify-content: center;
  border-radius: 50%;
  font-weight: 800;
  color: #fff;
  background: linear-gradient(135deg, var(--gold-dark) 0%, var(--gold) 100%);
  box-shadow: 0 12px 26px rgba(201, 154, 58, 0.26);
  margin-bottom: 16px;
}

.kpi-layout {
  display: grid;
  grid-template-columns: minmax(0, 1.2fr) minmax(320px, 0.8fr);
  gap: 24px;
  align-items: start;
}

.check-list {
  margin: 0;
  padding: 0;
  list-style: none;
  display: grid;
  gap: 12px;
}

.check-list li {
  background: rgba(255,255,255,0.9);
  border: 1px solid rgba(30, 42, 58, 0.08);
  border-radius: 18px;
  padding: 16px 18px 16px 48px;
  position: relative;
  box-shadow: var(--shadow);
  font-weight: 600;
}

.check-list li::before {
  content: "✓";
  position: absolute;
  left: 18px;
  top: 14px;
  width: 22px;
  height: 22px;
  border-radius: 50%;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  background: rgba(201, 154, 58, 0.14);
  color: var(--gold-dark);
  font-weight: 800;
}

.kpi-note {
  padding: 24px;
  position: sticky;
  top: 110px;
}

.sources-section .source-links {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 14px;
}

.source-links a {
  padding: 16px 18px;
  color: var(--navy);
  font-weight: 600;
  transition: transform 0.2s ease, border-color 0.2s ease;
}

.source-links a:hover,
.source-links a:focus-visible,
.related-link:hover,
.related-link:focus-visible {
  transform: translateY(-2px);
  border-color: rgba(201, 154, 58, 0.34);
}

.faq-list {
  display: grid;
  gap: 16px;
}

.faq-item {
  overflow: hidden;
}

.faq-question {
  width: 100%;
  background: none;
  border: none;
  text-align: left;
  padding: 24px 62px 24px 24px;
  font: inherit;
  font-size: 1.05rem;
  font-weight: 700;
  position: relative;
  cursor: pointer;
}

.faq-question::after,
.faq-question::before {
  content: "";
  position: absolute;
  top: 50%;
  right: 24px;
  width: 16px;
  height: 2px;
  background: var(--gold-dark);
  transition: transform 0.2s ease;
}

.faq-question::before {
  transform: translateY(-50%) rotate(90deg);
}

.faq-question::after {
  transform: translateY(-50%);
}

.faq-item.is-open .faq-question::before {
  transform: translateY(-50%) rotate(0deg);
}

.faq-answer {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.3s ease;
}

.faq-item.is-open .faq-answer {
  max-height: 240px;
}

.faq-answer p {
  padding: 0 24px 24px;
  margin: 0;
}

.cta-section {
  padding-top: 28px;
}

.cta-box {
  background: linear-gradient(135deg, #fffdf8 0%, #f7f2e8 100%);
  border: 1px solid rgba(201, 154, 58, 0.18);
  border-radius: 32px;
  padding: 34px;
  display: grid;
  grid-template-columns: minmax(0, 1.2fr) auto;
  gap: 22px;
  align-items: center;
  box-shadow: 0 28px 60px rgba(201, 154, 58, 0.12);
}

.cta-box h2 {
  margin: 0 0 12px;
  font-size: clamp(1.5rem, 2.6vw, 2.6rem);
}

.related-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 14px;
}

.related-link {
  padding: 16px 18px;
  font-weight: 700;
  transition: transform 0.2s ease, border-color 0.2s ease, background 0.2s ease;
}

.related-link.current {
  background: linear-gradient(135deg, rgba(201,154,58,0.12) 0%, rgba(255,255,255,1) 100%);
  border-color: rgba(201, 154, 58, 0.4);
}

.site-footer {
  padding: 34px 0 110px;
  background: linear-gradient(180deg, rgba(255,255,255,0) 0%, rgba(247,242,232,0.78) 100%);
}

.footer-grid {
  display: flex;
  justify-content: space-between;
  gap: 24px;
  align-items: flex-start;
  border-top: 1px solid rgba(30, 42, 58, 0.08);
  padding-top: 28px;
}

.footer-brand {
  display: inline-block;
  font-weight: 800;
  margin-bottom: 10px;
}

.footer-links {
  display: grid;
  gap: 10px;
}

.footer-links a {
  color: var(--navy);
  font-weight: 600;
}

.floating-cta {
  position: fixed;
  right: 16px;
  bottom: 16px;
  z-index: 990;
  padding: 14px 18px;
  border-radius: 999px;
  background: linear-gradient(135deg, var(--gold-dark) 0%, var(--gold) 100%);
  color: #fff;
  font-weight: 800;
  box-shadow: 0 16px 28px rgba(201, 154, 58, 0.3);
}

@media (max-width: 1100px) {
  .hero-grid,
  .kpi-layout,
  .cta-box {
    grid-template-columns: 1fr;
  }

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

  .feature-grid,
  .insight-grid,
  .usecase-grid,
  .service-grid,
  .related-grid,
  .sources-section .source-links {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .feature-grid .feature-card:first-child {
    grid-column: auto;
  }

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

@media (max-width: 920px) {
  .menu-toggle {
    display: inline-flex;
    align-items: center;
    justify-content: center;
  }

  .global-nav {
    position: absolute;
    left: 20px;
    right: 20px;
    top: calc(100% + 10px);
    background: rgba(255,255,255,0.98);
    border: 1px solid rgba(30, 42, 58, 0.08);
    border-radius: 22px;
    box-shadow: var(--shadow);
    padding: 18px;
    flex-direction: column;
    align-items: stretch;
    gap: 12px;
    opacity: 0;
    visibility: hidden;
    pointer-events: none;
    transform: translateY(-8px);
    transition: opacity 0.2s ease, transform 0.2s ease, visibility 0.2s ease;
  }

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

  .brand span {
    display: none;
  }

  .trust-grid,
  .feature-grid,
  .insight-grid,
  .usecase-grid,
  .service-grid,
  .related-grid,
  .sources-section .source-links,
  .flow-grid {
    grid-template-columns: 1fr;
  }

  .timeline-item {
    grid-template-columns: 1fr;
  }

  .hero-grid {
    gap: 28px;
  }

  .hero-visual-card {
    padding: 14px;
  }

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

  .footer-grid {
    flex-direction: column;
  }
}

@media (max-width: 640px) {
  .header-inner {
    min-height: 76px;
  }

  .brand img {
    width: 162px;
  }

  .hero {
    padding-top: 40px;
  }

  .section {
    padding: 72px 0;
  }

  .cta-box,
  .feature-card,
  .insight-card,
  .usecase-card,
  .service-card,
  .flow-card,
  .timeline-item,
  .trust-item,
  .kpi-note,
  .related-link,
  .source-links a,
  .faq-question {
    border-radius: 20px;
  }

  .cta-box {
    padding: 24px;
  }

  .hero h1 {
    font-size: 2rem;
  }

  .lead,
  .section-heading p,
  .feature-card p,
  .insight-card p,
  .usecase-card p,
  .service-card p,
  .timeline-item p,
  .flow-card p,
  .kpi-note p,
  .faq-answer p,
  .cta-box p {
    font-size: 0.96rem;
  }

  .floating-cta {
    left: 16px;
    right: 16px;
    text-align: center;
  }
}

.reveal {
  opacity: 0;
  transform: translateY(20px);
  transition: opacity 0.5s ease, transform 0.5s ease;
}

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