:root {
  --navy: #071923;
  --navy-2: #0b2631;
  --ink: #102630;
  --teal: #1fd5c1;
  --teal-dark: #009b8c;
  --paper: #f7faf9;
  --white: #ffffff;
  --muted: #66777d;
  --line: #d8e1df;
  --font-jp: "Noto Sans JP", sans-serif;
  --font-en: "DM Sans", sans-serif;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body { margin: 0; color: var(--ink); background: var(--paper); font-family: var(--font-jp); font-size: 16px; line-height: 1.8; -webkit-font-smoothing: antialiased; }
a { color: inherit; text-decoration: none; }
img { display: block; max-width: 100%; }
.skip-link { position: fixed; left: 1rem; top: -5rem; z-index: 100; padding: .7rem 1rem; background: white; color: var(--ink); }
.skip-link:focus { top: 1rem; }

.site-header { position: fixed; inset: 0 0 auto; z-index: 20; height: 82px; padding: 0 clamp(1.25rem, 4vw, 4.5rem); display: flex; align-items: center; justify-content: space-between; color: white; border-bottom: 1px solid rgba(255,255,255,.16); transition: background .3s, height .3s; }
.site-header.scrolled { height: 68px; background: rgba(7,25,35,.96); backdrop-filter: blur(12px); }
.brand { display: inline-flex; align-items: center; flex: 0 0 auto; }
.brand-logo-frame { width: 13.4rem; height: 2.65rem; display: block; position: relative; overflow: hidden; }
.brand-logo { width: 13.4rem; max-width: none; height: auto; position: absolute; left: 0; top: 50%; transform: translateY(-50%); }
nav { display: flex; gap: clamp(1.2rem, 2.5vw, 2.7rem); margin-left: auto; margin-right: 2.5rem; }
nav a { font-size: .82rem; font-weight: 500; letter-spacing: .04em; opacity: .82; }
nav a:hover, nav a:focus-visible { opacity: 1; color: var(--teal); }
.header-cta { padding: .62rem 1.05rem; border: 1px solid rgba(255,255,255,.5); font-size: .82rem; font-weight: 600; }
.header-cta:hover, .header-cta:focus-visible { background: white; color: var(--navy); }

.hero { min-height: 800px; height: 100svh; position: relative; display: flex; align-items: center; overflow: hidden; color: white; background: var(--navy); }
.hero-image { position: absolute; inset: 0; width: 100%; height: 100%; object-fit: cover; object-position: 58% center; }
.hero-shade { position: absolute; inset: 0; background: linear-gradient(90deg, rgba(3,15,23,.98) 0%, rgba(3,15,23,.87) 38%, rgba(3,15,23,.32) 70%, rgba(3,15,23,.06) 100%), linear-gradient(0deg, rgba(3,15,23,.65), transparent 35%); }
.hero-content { position: relative; z-index: 2; width: min(760px, 84vw); margin-left: clamp(1.25rem, 8vw, 9rem); padding-top: 4rem; }
.eyebrow, .section-kicker { margin: 0 0 1.8rem; color: rgba(255,255,255,.68); font: 600 .72rem/1 var(--font-en); letter-spacing: .2em; }
.eyebrow.teal { color: var(--teal); }
.hero h1 { margin: 0; font-size: clamp(3.25rem, 6.3vw, 6.8rem); line-height: 1.11; letter-spacing: -.07em; font-weight: 600; }
.hero h1 span { color: var(--teal); }
.hero-lead { max-width: 660px; margin: 2.2rem 0 0; font-size: clamp(1rem, 1.3vw, 1.2rem); line-height: 1.9; color: rgba(255,255,255,.84); }
.hero-actions { display: flex; align-items: center; gap: 2.2rem; margin-top: 2.5rem; }
.button { min-height: 50px; padding: .85rem 1.35rem; display: inline-flex; align-items: center; justify-content: space-between; gap: 2.5rem; font-size: .9rem; font-weight: 600; transition: transform .2s, background .2s; }
.button:hover, .button:focus-visible { transform: translateY(-2px); }
.button-primary { background: var(--teal); color: var(--navy); }
.button-primary:hover { background: #4de1d1; }
.button-dark { background: var(--navy); color: white; }
.text-link { font-size: .9rem; border-bottom: 1px solid rgba(255,255,255,.45); padding-bottom: .25rem; }
.hero-note { display: flex; align-items: center; gap: .6rem; margin-top: 2.2rem; font-size: .78rem; color: rgba(255,255,255,.62); }
.hero-note span, .platform-status span { width: 7px; height: 7px; display: inline-block; background: var(--teal); border-radius: 50%; box-shadow: 0 0 0 4px rgba(31,213,193,.12); }
.hero-index { position: absolute; z-index: 2; right: clamp(1.25rem, 4vw, 4.5rem); bottom: 2rem; display: flex; gap: 1.5rem; font: 500 .68rem/1 var(--font-en); letter-spacing: .14em; color: rgba(255,255,255,.56); }

.trust-strip { display: grid; grid-template-columns: repeat(4, 1fr); border-bottom: 1px solid var(--line); background: white; }
.trust-strip > div { min-height: 144px; padding: 1.8rem clamp(1.2rem, 3vw, 3.4rem); display: grid; align-content: center; border-right: 1px solid var(--line); }
.trust-strip > div:last-child { border-right: 0; }
.trust-label { color: var(--teal-dark); font: 600 .65rem/1 var(--font-en); letter-spacing: .17em; }
.trust-strip strong { margin: .65rem 0 .15rem; font: 600 clamp(1.35rem, 2vw, 2rem)/1.2 var(--font-en); letter-spacing: -.04em; }
.trust-strip div > span:last-child { font-size: .76rem; color: var(--muted); }

.section { padding: clamp(5rem, 10vw, 9.5rem) clamp(1.25rem, 7.5vw, 8.5rem); }
.section-kicker { color: var(--teal-dark); margin-bottom: 3.4rem; }
.intro-grid { display: grid; grid-template-columns: 1.05fr 1fr; gap: 9vw; }
h2 { margin: 0; font-size: clamp(2.35rem, 4.6vw, 4.8rem); line-height: 1.25; letter-spacing: -.065em; font-weight: 600; }
.intro-grid > div:last-child { max-width: 650px; }
.intro-grid p { color: var(--muted); }
.intro-grid .large-copy { margin-top: 0; color: var(--ink); font-size: clamp(1.15rem, 1.7vw, 1.45rem); line-height: 1.85; }

.structure { margin-top: 6rem; display: grid; grid-template-columns: 1fr 150px 1fr 150px 1fr; align-items: stretch; }
.structure-party { padding: 2.2rem; border-top: 3px solid var(--ink); background: white; min-height: 300px; }
.structure-party.iae { color: white; background: var(--navy); border-top-color: var(--teal); }
.structure-party p { margin: 0 0 2.3rem; color: var(--teal-dark); font: 600 .68rem/1 var(--font-en); letter-spacing: .15em; }
.structure-party h3 { margin: 0 0 1.2rem; font-size: 1.45rem; }
.structure-party ul { list-style: none; margin: 0; padding: 0; }
.structure-party li { padding: .55rem 0; border-top: 1px solid var(--line); font-size: .84rem; color: var(--muted); }
.structure-party.iae li { border-color: rgba(255,255,255,.15); color: rgba(255,255,255,.67); }
.flow-pair { min-width: 0; padding: 2rem 0; display: grid; grid-template-rows: 1fr 1fr; gap: 1.35rem; align-content: center; text-align: center; }
.flow-row { min-width: 0; display: flex; flex-direction: column; align-items: center; gap: .42rem; }
.flow-row b { font-size: .72rem; line-height: 1.35; }
.flow-row small { color: var(--muted); font: 500 .56rem/1.25 var(--font-en); white-space: nowrap; }
.flow-arrow { position: relative; display: block; width: 100%; height: 1px; background: var(--teal-dark); }
.flow-arrow::before, .flow-arrow::after { content: ""; position: absolute; top: 50%; width: 0; height: 0; transform: translateY(-50%); }
.to-left .flow-arrow::before { left: 0; border-top: 4px solid transparent; border-bottom: 4px solid transparent; border-right: 7px solid var(--teal-dark); }
.to-right .flow-arrow::after { right: 0; border-top: 4px solid transparent; border-bottom: 4px solid transparent; border-left: 7px solid var(--teal-dark); }
.structure-note { margin: 1.5rem 0 0; font-size: .76rem; color: var(--muted); }

.dark-section { background: var(--navy); color: white; }
.dark-section .section-kicker { color: var(--teal); }
.dark-heading { display: grid; grid-template-columns: 1.2fr .8fr; align-items: end; gap: 8vw; }
.dark-heading h2 span { color: var(--teal); }
.dark-heading p { max-width: 540px; margin: 0; color: rgba(255,255,255,.62); }
.principles { display: grid; grid-template-columns: repeat(3, 1fr); margin-top: 6rem; border-top: 1px solid rgba(255,255,255,.17); }
.principles article { padding: 2.1rem 2.2rem 3rem 0; border-right: 1px solid rgba(255,255,255,.17); }
.principles article:not(:first-child) { padding-left: 2.2rem; }
.principles article:last-child { border-right: 0; }
.principles span { color: var(--teal); font: 500 .72rem/1 var(--font-en); }
.principles h3 { margin: 2.6rem 0 1.2rem; font-size: 1.25rem; }
.principles p { margin: 0; color: rgba(255,255,255,.58); font-size: .9rem; }
.platform-panel { margin-top: 6rem; display: grid; grid-template-columns: .8fr 1.2fr; gap: 5vw; padding: clamp(2rem, 5vw, 5rem); background: var(--navy-2); border: 1px solid rgba(255,255,255,.1); }
.platform-copy h3 { margin: 0 0 1.3rem; font: 600 clamp(3.2rem, 6vw, 5.8rem)/1 var(--font-en); letter-spacing: -.07em; }
.platform-copy > p:not(.eyebrow) { color: rgba(255,255,255,.63); max-width: 470px; }
.platform-status { margin-top: 2rem; display: flex; align-items: center; gap: .8rem; color: rgba(255,255,255,.45); font: 500 .63rem/1.5 var(--font-en); letter-spacing: .11em; }
.signal-chart { align-self: center; min-width: 0; padding: 1.4rem; background: #081c25; border: 1px solid rgba(255,255,255,.08); }
.chart-top, .chart-axis { display: flex; justify-content: space-between; color: rgba(255,255,255,.35); font: 500 .6rem/1 var(--font-en); letter-spacing: .12em; }
.signal-chart svg { width: 100%; margin: 1.2rem 0 .4rem; overflow: visible; }
.gridline { stroke: rgba(255,255,255,.07); stroke-width: 1; }
.area { fill: url(#area); }
.curve { fill: none; stroke: var(--teal); stroke-width: 3; }
.baseline { stroke: rgba(255,255,255,.17); stroke-width: 1; }
.signal-chart circle { fill: var(--teal); }

.fit-section { background: white; }
.fit-grid { display: grid; grid-template-columns: .8fr 1.2fr; gap: 9vw; }
.fit-grid > div > p { max-width: 520px; margin: 2rem 0; color: var(--muted); }
.checklist { list-style: none; margin: 0; padding: 0; border-top: 1px solid var(--line); }
.checklist li { padding: 1.35rem .2rem; display: grid; grid-template-columns: 60px 1fr; gap: 1rem; border-bottom: 1px solid var(--line); }
.checklist li > span { color: var(--teal-dark); font: 500 .73rem/1.5 var(--font-en); }
.checklist div { display: flex; justify-content: space-between; align-items: baseline; gap: 2rem; }
.checklist strong { font-size: 1rem; }
.checklist small { color: var(--muted); font-size: .76rem; text-align: right; }

.process-section { background: #e9f0ef; }
.process-heading, .team-heading { display: flex; justify-content: space-between; align-items: end; gap: 3rem; }
.process-heading p, .team-heading p { width: min(460px, 42%); margin: 0; color: var(--muted); }
.process { counter-reset: step; list-style: none; padding: 0; margin: 5rem 0 0; display: grid; grid-template-columns: repeat(5, 1fr); border-top: 1px solid #aab9b6; }
.process li { position: relative; padding: 2.2rem 1.4rem 0 0; border-right: 1px solid #c5d0ce; min-height: 190px; }
.process li:not(:first-child) { padding-left: 1.4rem; }
.process li:last-child { border-right: 0; }
.process li::before { content: ""; position: absolute; top: -5px; left: -1px; width: 9px; height: 9px; border-radius: 50%; background: var(--teal-dark); }
.process li span { color: var(--teal-dark); font: 500 .72rem/1 var(--font-en); }
.process h3 { margin: 2rem 0 .7rem; font-size: 1rem; }
.process p { margin: 0; color: var(--muted); font-size: .78rem; }

.expertise-section { background: var(--paper); }
.expertise-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 1px; margin-top: 5rem; background: var(--line); border: 1px solid var(--line); }
.expertise-card { min-height: 470px; padding: clamp(1.8rem, 3.4vw, 3.4rem); background: white; }
.expertise-card.featured { color: white; background: var(--navy); }
.expertise-card > span { color: var(--teal-dark); font: 600 .66rem/1 var(--font-en); letter-spacing: .14em; }
.expertise-card.featured > span { color: var(--teal); }
.expertise-card h3 { margin: 4rem 0 1.4rem; font-size: clamp(1.35rem, 2vw, 1.8rem); }
.expertise-card p { color: var(--muted); font-size: .9rem; }
.expertise-card.featured p { color: rgba(255,255,255,.62); }
.expertise-card ul { list-style: none; margin: 2rem 0 0; padding: 0; }
.expertise-card li { padding: .55rem 0; border-top: 1px solid var(--line); color: var(--muted); font-size: .78rem; }
.expertise-card.featured li { color: rgba(255,255,255,.68); border-color: rgba(255,255,255,.16); }

.company-section { color: white; background: var(--navy-2); }
.company-section .section-kicker { color: var(--teal); }
.company-grid { display: grid; grid-template-columns: .8fr 1.2fr; gap: 9vw; }
.company-grid > div p { max-width: 500px; color: rgba(255,255,255,.56); }
.company-grid > div .company-note { margin-top: 2rem; padding-top: 1.6rem; border-top: 1px solid rgba(255,255,255,.15); font-size: .82rem; }
.company-grid dl { margin: 0; border-top: 1px solid rgba(255,255,255,.2); }
.company-grid dl div { padding: 1.25rem 0; display: grid; grid-template-columns: 140px 1fr; border-bottom: 1px solid rgba(255,255,255,.15); }
.company-grid dt { color: rgba(255,255,255,.45); font-size: .76rem; }
.company-grid dd { margin: 0; font-size: .9rem; }
.company-grid dd small { color: rgba(255,255,255,.45); font-family: var(--font-en); }

.faq-section { background: white; }
.faq-grid { display: grid; grid-template-columns: .7fr 1.3fr; gap: 9vw; }
.faqs { border-top: 1px solid var(--ink); }
.faqs details { border-bottom: 1px solid var(--line); }
.faqs summary { list-style: none; cursor: pointer; position: relative; padding: 1.7rem 3rem 1.7rem 0; font-weight: 600; }
.faqs summary::-webkit-details-marker { display: none; }
.faqs summary span::before, .faqs summary span::after { content: ""; position: absolute; right: .5rem; top: 50%; width: 14px; height: 1px; background: var(--teal-dark); }
.faqs summary span::after { transform: rotate(90deg); transition: transform .2s; }
.faqs details[open] summary span::after { transform: rotate(0); }
.faqs details p { margin: -0.5rem 3rem 1.8rem 0; color: var(--muted); font-size: .9rem; }

.contact-section { padding: clamp(4rem, 8vw, 7.5rem) clamp(1.25rem, 7.5vw, 8.5rem); display: grid; grid-template-columns: 1.1fr .9fr; gap: 8vw; align-items: end; color: white; background: linear-gradient(120deg, #08232c, #071923 72%); }
.contact-section h2 { font-size: clamp(2.4rem, 4.2vw, 4.3rem); }
.contact-side p { max-width: 520px; margin: 0 0 2rem; color: rgba(255,255,255,.62); }
.contact-note { padding: 1.5rem; border: 1px solid rgba(255,255,255,.18); display: grid; gap: .35rem; }
.contact-note span { color: var(--teal); font: 600 .64rem/1 var(--font-en); letter-spacing: .14em; }
.contact-note strong { font-size: .95rem; }
.contact-note small { color: rgba(255,255,255,.5); font-size: .75rem; }
footer { min-height: 110px; padding: 0 clamp(1.25rem, 7.5vw, 8.5rem); display: flex; align-items: center; justify-content: space-between; gap: 2rem; color: rgba(255,255,255,.52); background: #031117; font: 400 .72rem/1.5 var(--font-en); }
.footer-brand { color: white; }

:focus-visible { outline: 2px solid var(--teal); outline-offset: 4px; }
@media (max-width: 1020px) {
  nav { display: none; }
  .hero { min-height: 720px; }
  .hero-content { margin-left: clamp(1.25rem, 6vw, 4rem); }
  .trust-strip { grid-template-columns: repeat(2, 1fr); }
  .trust-strip > div:nth-child(2) { border-right: 0; }
  .trust-strip > div:nth-child(-n+2) { border-bottom: 1px solid var(--line); }
  .intro-grid, .dark-heading, .fit-grid, .company-grid, .faq-grid, .contact-section { grid-template-columns: 1fr; }
  .structure { grid-template-columns: 1fr; }
  .structure .markets { grid-column: auto; margin-top: 0; min-height: auto; }
  .structure .markets ul { display: grid; grid-template-columns: repeat(3, 1fr); gap: 1rem; }
  .flow-pair { min-height: 150px; padding: 1rem 10%; grid-template-columns: 1fr 1fr; grid-template-rows: none; gap: 2rem; }
  .flow-row { justify-content: center; }
  .flow-arrow { width: 1px; height: 64px; }
  .flow-arrow::before, .flow-arrow::after { content: none; }
  .mobile-up .flow-arrow::before { content: ""; left: 50%; top: 0; transform: translate(-50%, 0); border-left: 4px solid transparent; border-right: 4px solid transparent; border-bottom: 7px solid var(--teal-dark); }
  .mobile-down .flow-arrow::after { content: ""; left: 50%; right: auto; top: auto; bottom: 0; transform: translate(-50%, 0); border-left: 4px solid transparent; border-right: 4px solid transparent; border-top: 7px solid var(--teal-dark); }
  .platform-panel { grid-template-columns: 1fr; }
  .fit-grid, .company-grid { gap: 4rem; }
  .process-heading, .team-heading { align-items: flex-start; flex-direction: column; }
  .process-heading p, .team-heading p { width: min(600px, 100%); }
  .process { grid-template-columns: repeat(3, 1fr); }
  .process li:nth-child(3) { border-right: 0; }
  .process li:nth-child(n+4) { border-top: 1px solid #aab9b6; }
  .expertise-grid { grid-template-columns: 1fr; }
  .expertise-card { min-height: auto; }
}

@media (max-width: 680px) {
  body { font-size: 16px; }
  .site-header { height: 68px; padding: 0 1rem; }
  .site-header .brand-logo-frame { width: 11rem; height: 2.4rem; }
  .site-header .brand-logo { width: 11rem; }
  .header-cta { padding: .55rem .75rem; }
  .hero { height: auto; min-height: 760px; align-items: flex-end; }
  .hero-image { object-position: 66% center; }
  .hero-shade { background: linear-gradient(0deg, rgba(3,15,23,.99) 0%, rgba(3,15,23,.86) 57%, rgba(3,15,23,.3) 100%); }
  .hero-content { width: auto; margin: 0; padding: 8rem 1.25rem 5rem; }
  .hero h1 { font-size: clamp(2.8rem, 13vw, 4.2rem); }
  .hero-lead { line-height: 1.75; }
  .hero-actions { align-items: stretch; flex-direction: column; gap: 1.25rem; }
  .button { width: 100%; }
  .text-link { align-self: flex-start; }
  .hero-index { display: none; }
  .trust-strip { grid-template-columns: 1fr; }
  .trust-strip > div { min-height: 118px; border-right: 0; border-bottom: 1px solid var(--line); }
  .section { padding: 5rem 1.25rem; }
  .section-kicker { margin-bottom: 2rem; }
  h2 { font-size: clamp(2.2rem, 11vw, 3.4rem); }
  .intro-grid { gap: 2.5rem; }
  .structure { margin-top: 3.5rem; grid-template-columns: 1fr; }
  .flow-pair { padding-inline: 0; gap: 1rem; }
  .flow-row b { font-size: .7rem; }
  .flow-row small { font-size: .53rem; }
  .structure .markets { grid-column: auto; margin-top: 0; }
  .structure .markets ul { grid-template-columns: 1fr; gap: 0; }
  .principles { grid-template-columns: 1fr; margin-top: 3.5rem; }
  .principles article, .principles article:not(:first-child) { padding: 2rem 0; border-right: 0; border-bottom: 1px solid rgba(255,255,255,.17); }
  .principles h3 { margin-top: 1rem; }
  .platform-panel { margin: 3.5rem -1.25rem -5rem; padding: 3rem 1.25rem; border-left: 0; border-right: 0; }
  .signal-chart { padding: .8rem; }
  .checklist div { display: block; }
  .checklist small { display: block; text-align: left; margin-top: .25rem; }
  .process { grid-template-columns: 1fr; margin-top: 3.5rem; }
  .process li, .process li:not(:first-child) { min-height: auto; padding: 1.6rem 0 1.6rem 2.6rem; border-right: 0; border-bottom: 1px solid #c5d0ce; border-top: 0; }
  .process li::before { top: 2.2rem; left: 0; }
  .process h3 { margin: .5rem 0 .35rem; }
  .expertise-card { padding: 2rem 1.5rem; }
  .expertise-card h3 { margin-top: 2.5rem; }
  .company-grid dl div { grid-template-columns: 100px 1fr; }
  .faq-grid { gap: 2.5rem; }
  .contact-section { padding: 4.5rem 1.25rem; }
  footer { padding: 2rem 1.25rem; flex-wrap: wrap; }
  footer p { order: 3; width: 100%; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { transition-duration: .01ms !important; }
}