:root {
  --white: #ffffff;
  --offwhite: #f7f7f5;
  --mist: #eef1f5;
  --ink: #101114;
  --navy: #06185b;
  --text: #2d3036;
  --muted: #71757c;
  --line: #d8dade;
  --font: "Hiragino Kaku Gothic ProN", "Yu Gothic", "Noto Sans JP", sans-serif;
  --ease: cubic-bezier(.22, .65, .18, 1);
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  color: var(--text);
  background: var(--white);
  font-family: var(--font);
  font-size: 16px;
  line-height: 1.9;
  -webkit-font-smoothing: antialiased;
}
body.menu-open { overflow: hidden; }
a { color: inherit; text-decoration: none; }
button { color: inherit; font: inherit; }
img { display: block; max-width: 100%; }
::selection { color: #fff; background: var(--navy); }

.skip-link {
  position: fixed;
  left: 12px;
  top: 12px;
  z-index: 1000;
  padding: 8px 14px;
  color: #fff;
  background: var(--navy);
  transform: translateY(-160%);
}
.skip-link:focus { transform: none; }

.site-header {
  position: fixed;
  inset: 0 0 auto;
  z-index: 100;
  height: 82px;
  display: flex;
  align-items: center;
  padding: 0 clamp(28px, 5.5vw, 84px);
  background: rgba(255,255,255,.97);
  border-bottom: 1px solid transparent;
  transition: height .3s var(--ease), border-color .3s;
}
.site-header.scrolled { height: 70px; border-color: var(--line); }
.logo { position: relative; z-index: 1; width: 178px; flex: 0 0 auto; }
.logo img { width: 100%; height: auto; }
.nav-panel { flex: 1; display: flex; justify-content: flex-end; align-items: center; gap: clamp(22px, 3.4vw, 54px); }
.global-nav { display: flex; gap: clamp(20px, 2.7vw, 42px); }
.global-nav a { position: relative; color: var(--ink); font-size: .8rem; font-weight: 700; letter-spacing: .02em; }
.global-nav a::after { content: ""; position: absolute; left: 0; right: 100%; bottom: -7px; height: 1px; background: var(--navy); transition: right .25s var(--ease); }
.global-nav a:hover::after { right: 0; }
.header-actions { display: flex; align-items: center; gap: 10px; }
.lang-button { padding: 8px 0; border: 0; background: transparent; font-size: .62rem; letter-spacing: .08em; }
.lang-button > * + * { margin-left: 7px; }
.lang-button > :not([aria-current]) { opacity: .35; transition: opacity .2s; }
.lang-button a:hover { opacity: 1; }
.header-material { min-width: 88px; padding: 9px 14px; color: var(--navy); border: 1px solid var(--line); text-align: center; font-size: .72rem; font-weight: 700; transition: border-color .25s, background .25s; }
.header-material:hover { border-color: var(--navy); background: var(--pale); }
.header-contact { min-width: 140px; padding: 10px 20px; color: var(--navy); border: 1px solid var(--navy); border-radius: 99px; text-align: center; font-size: .76rem; font-weight: 700; transition: color .25s, background .25s; }
.header-contact:hover { color: #fff; background: var(--navy); }
.menu-button { display: none; }

.hero { position: relative; min-height: 790px; height: 100svh; max-height: 980px; overflow: hidden; color: #fff; }
.hero-image { width: 100%; height: 100%; object-fit: cover; object-position: center 46%; }
.hero-shade { position: absolute; inset: 0; background: linear-gradient(90deg, rgba(4,8,20,.78) 0%, rgba(4,8,20,.47) 46%, rgba(4,8,20,.12) 78%); }
.hero-content { position: absolute; left: clamp(38px, 7vw, 108px); bottom: clamp(78px, 11vh, 128px); max-width: 900px; }
.hero-label { margin: 0 0 24px; font-size: .75rem; font-weight: 700; letter-spacing: .11em; text-transform: uppercase; }
.hero h1 { margin: 0; font-size: clamp(3rem, 5.5vw, 5.5rem); line-height: 1.28; letter-spacing: .01em; font-weight: 700; }
.hero-lead { max-width: 620px; margin: 27px 0 32px; font-size: clamp(.95rem, 1.3vw, 1.1rem); letter-spacing: .02em; }
.hero-link { min-width: 230px; display: inline-flex; justify-content: space-between; align-items: center; gap: 38px; padding: 16px 19px; color: var(--ink); background: #fff; font-size: .78rem; font-weight: 700; }
.hero-link i, .text-link i, .outline-link i, .contact-inner a i { font-style: normal; transition: transform .25s; }
.hero-link:hover i, .text-link:hover i, .outline-link:hover i, .contact-inner a:hover i { transform: translateX(5px); }
.scroll-link { position: absolute; right: clamp(27px, 4vw, 64px); bottom: 50px; display: flex; align-items: center; gap: 12px; font-size: .65rem; letter-spacing: .08em; writing-mode: vertical-rl; }
.scroll-link i { position: relative; width: 1px; height: 60px; margin-top: 8px; background: rgba(255,255,255,.55); }

.about-section, .audience-section, .method-section, .insights-section { padding: clamp(72px, 9vw, 120px) clamp(28px, 7vw, 108px); }
.section-label { display: flex; align-items: center; gap: 18px; color: var(--muted); font-size: .69rem; font-weight: 700; letter-spacing: .06em; text-transform: uppercase; }
.section-label span:first-child { color: var(--navy); }
.about-grid { display: grid; grid-template-columns: 1.08fr .92fr; gap: clamp(60px, 12vw, 190px); align-items: start; margin-top: 78px; }
.about-grid h2, .section-title h2, .opri-copy h2, .contact-inner h2 { margin: 0; color: var(--ink); font-size: clamp(1.7rem, 2.9vw, 2.6rem); line-height: 1.55; letter-spacing: .005em; font-weight: 700; }
.about-copy { max-width: 570px; padding-top: 8px; }
.about-copy > p:first-child { margin: 0; color: #4b4f56; font-size: .94rem; }
.position { margin: 31px 0 29px; color: var(--navy); font-weight: 700; }
.text-link { display: inline-flex; align-items: center; gap: 50px; padding-bottom: 4px; border-bottom: 1px solid currentColor; font-size: .76rem; font-weight: 700; }

.audience-section { background: var(--mist); }
.section-title { display: flex; align-items: flex-end; justify-content: space-between; gap: 50px; margin-bottom: 52px; }
.section-title .section-label { align-self: flex-start; padding-top: 15px; }
.section-title h2 { max-width: 760px; }
.section-lead { margin: 18px 0 0; max-width: 640px; color: #4b4f56; font-size: .95rem; line-height: 2; }
.audience-row { display: grid; grid-template-columns: 1fr 1fr; align-items: stretch; max-width: 1280px; margin: 0 auto 64px; background: #fff; }
.audience-row:last-child { margin-bottom: 0; }
.audience-image { min-height: 480px; overflow: hidden; }
.audience-image img { width: 100%; height: 100%; object-fit: cover; filter: saturate(.18) contrast(.93); transition: transform .9s var(--ease), filter .45s; }
.audience-row:hover .audience-image img { transform: scale(1.025); filter: saturate(.35) contrast(.96); }
.audience-copy { display: flex; flex-direction: column; justify-content: center; padding: clamp(42px, 6vw, 90px); }
.audience-number { color: var(--navy); font-size: .68rem; font-weight: 700; }
.audience-type { margin: 13px 0 28px; color: var(--muted); font-size: .72rem; letter-spacing: .05em; text-transform: uppercase; }
.audience-copy h3 { margin: 0 0 25px; color: var(--ink); font-size: clamp(1.8rem, 2.7vw, 2.8rem); line-height: 1.45; }
.audience-copy > p:not(.audience-type) { margin: 0 0 30px; color: #555961; font-size: .9rem; }
.audience-copy .text-link { align-self: flex-start; }
.audience-row-reverse .audience-image { grid-column: 2; grid-row: 1; }
.audience-row-reverse .audience-copy { grid-column: 1; grid-row: 1; }
.public-service-strip { max-width: 1280px; display: grid; grid-template-columns: minmax(260px,.85fr) minmax(340px,1.15fr) auto; gap: clamp(35px,6vw,90px); align-items: start; margin: -30px auto 0; padding: 38px 0 8px; border-top: 1px solid var(--ink); }
.public-service-strip > div > span { display: block; margin-bottom: 13px; color: var(--muted); font-size: .67rem; font-weight: 700; letter-spacing: .07em; text-transform: uppercase; }
.public-service-strip h3 { margin: 0; color: var(--ink); font-size: clamp(1.25rem,2vw,1.7rem); line-height: 1.55; }
.public-service-strip > p { margin: 0; color: #555961; font-size: .88rem; }
.public-service-strip .text-link { align-self: start; white-space: nowrap; }

.method-section { background: #fff; }
.method-list { max-width: 1280px; display: grid; grid-template-columns: repeat(4, 1fr); margin: 0 auto; padding: 0; border-top: 1px solid var(--ink); list-style: none; }
.method-list li { padding: 26px 28px 30px 0; border-bottom: 1px solid var(--line); }
.method-list li + li { padding-left: 28px; border-left: 1px solid var(--line); }
.method-list li > span { color: var(--navy); font-size: .68rem; font-weight: 700; }
.method-list h3 { margin: 22px 0 12px; color: var(--ink); font-size: 1.22rem; }
.method-list p { margin: 0; color: #4b4f56; font-size: .88rem; line-height: 1.95; }
.outline-link { min-width: 250px; display: flex; justify-content: space-between; align-items: center; gap: 40px; width: fit-content; margin: 50px 0 0 auto; padding: 15px 18px; border: 1px solid var(--ink); font-size: .75rem; font-weight: 700; }
.outline-link:hover { color: #fff; background: var(--ink); }

.insights-section { color: #fff; background: var(--navy); }
.insights-section .section-label { color: rgba(255,255,255,.55); }
.insights-section .section-label span:first-child { color: #fff; }
.insights-head { display: grid; grid-template-columns: .42fr 1fr auto; gap: 50px; align-items: end; margin-bottom: 82px; }
.insights-head h2 { margin: 0; font-size: clamp(2rem, 3.8vw, 3.8rem); line-height: 1.42; }
.insights-head .text-link { white-space: nowrap; }
.insights-list { border-top: 1px solid rgba(255,255,255,.45); }
.insight-item { display: grid; grid-template-columns: 180px 1fr 30px; gap: 45px; align-items: center; padding: 36px 4px; border-bottom: 1px solid rgba(255,255,255,.22); transition: padding .3s var(--ease), background .3s; }
.insight-item:hover { padding-left: 18px; padding-right: 18px; background: rgba(255,255,255,.06); }
.insight-meta { display: flex; flex-direction: column; gap: 6px; color: rgba(255,255,255,.55); font-size: .67rem; }
.insight-meta span { color: #fff; font-weight: 700; }
.insight-item h3 { margin: 0; font-size: clamp(1rem, 1.55vw, 1.35rem); line-height: 1.65; }
.insight-item > i { justify-self: end; font-style: normal; }

.opri-section { display: grid; grid-template-columns: 1fr 1fr; min-height: 680px; background: var(--offwhite); }
.opri-image { overflow: hidden; }
.opri-image img { width: 100%; height: 100%; object-fit: cover; filter: grayscale(.88) contrast(.88); }
.opri-copy { display: flex; flex-direction: column; justify-content: center; padding: clamp(55px, 8vw, 120px); }
.opri-kicker { margin: 0 0 34px; color: var(--navy); font-size: .69rem; font-weight: 700; letter-spacing: .05em; text-transform: uppercase; }
.opri-copy h2 { font-size: clamp(2rem, 3.55vw, 3.6rem); }
.opri-copy > p:not(.opri-kicker) { max-width: 550px; margin: 32px 0; color: #565a61; font-size: .9rem; }
.opri-copy .text-link { align-self: flex-start; }

.contact-section { min-height: 600px; display: grid; place-items: center; padding: 90px 30px; color: #fff; background: var(--ink); text-align: center; }
.contact-inner > p { margin: 0 0 30px; font-size: .72rem; letter-spacing: .1em; text-transform: uppercase; }
.contact-inner h2 { color: #fff; font-size: clamp(2.2rem, 4vw, 4rem); }
.contact-inner > a { min-width: 260px; display: inline-flex; align-items: center; justify-content: space-between; gap: 60px; margin-top: 50px; padding: 18px 21px; color: var(--ink); background: #fff; font-size: .78rem; font-weight: 700; }

.footer { display: grid; grid-template-columns: 1fr .7fr 1fr; gap: 60px; padding: 76px clamp(28px, 7vw, 108px) 26px; color: #fff; background: #08090c; }
.footer-brand img { width: 170px; padding: 5px 10px; background: #fff; }
.footer-brand p { margin: 25px 0 0; color: rgba(255,255,255,.48); font-size: .8rem; }
.footer-nav { display: grid; grid-template-columns: 1fr 1fr; align-content: start; gap: 8px 25px; }
.footer-nav a { color: rgba(255,255,255,.72); font-size: .72rem; }
.footer-info { color: rgba(255,255,255,.62); font-size: .72rem; }
.footer-info p { margin: 0 0 13px; }
.footer-info a { border-bottom: 1px solid rgba(255,255,255,.35); }
.footer-bottom { grid-column: 1 / -1; display: flex; gap: 34px; padding-top: 23px; color: rgba(255,255,255,.38); border-top: 1px solid rgba(255,255,255,.16); font-size: .62rem; }
html[lang="en"] .hero h1, html[lang="en"] .about-grid h2, html[lang="en"] .section-title h2, html[lang="en"] .contact-inner h2 { letter-spacing: -.025em; }
.footer-bottom span { margin-right: auto; }

.fade { opacity: 0; transform: translateY(14px); transition: opacity .75s var(--ease), transform .75s var(--ease); }
.fade.visible { opacity: 1; transform: none; }

@media (max-width: 1040px) {
  .site-header { padding: 0 28px; }
  .logo { width: 155px; }
  .nav-panel { gap: 30px; }
  .global-nav { gap: 22px; }
  .global-nav a { font-size: .72rem; }
  .header-contact { min-width: 122px; padding-inline: 14px; }
  .about-grid { gap: 70px; }
  .audience-copy { padding: 48px; }
  .method-list li, .method-list li + li { padding-left: 20px; padding-right: 20px; }
  .insights-head { grid-template-columns: 1fr auto; }
  .insights-head .section-label { grid-column: 1 / -1; }
}

@media (max-width: 820px) {
  .site-header { height: 70px; justify-content: space-between; }
  .menu-button { width: 50px; height: 50px; display: block; position: relative; margin-right: -12px; border: 0; background: transparent; cursor: pointer; }
  .menu-button span { position: absolute; left: 13px; width: 24px; height: 1px; background: var(--ink); transition: top .25s, transform .25s; }
  .menu-button span:first-child { top: 20px; }
  .menu-button span:last-child { top: 29px; }
  .menu-open .menu-button span:first-child { top: 25px; transform: rotate(45deg); }
  .menu-open .menu-button span:last-child { top: 25px; transform: rotate(-45deg); }
  .nav-panel { position: fixed; inset: 70px 0 0; display: flex; flex-direction: column; align-items: stretch; justify-content: center; gap: 35px; padding: 35px; background: #fff; visibility: hidden; opacity: 0; transform: translateY(-12px); transition: opacity .3s, transform .3s, visibility .3s; }
  .menu-open .nav-panel { visibility: visible; opacity: 1; transform: none; }
  .global-nav { flex-direction: column; gap: 0; }
  .global-nav a { display: flex; align-items: center; justify-content: space-between; min-height: 60px; border-bottom: 1px solid var(--line); font-size: 1.18rem; }
  .global-nav a::after { content: "→"; position: static; width: auto; height: auto; background: none; }
  .header-actions { align-items: stretch; }
  .lang-button { flex: .8; border: 1px solid var(--line); }
  .header-material { flex: 1; display: grid; place-items: center; }
  .header-contact { flex: 1.45; display: grid; place-items: center; border-radius: 0; }
  .hero { min-height: 720px; height: 100svh; }
  .hero-content { left: 30px; right: 30px; bottom: 78px; }
  .about-grid { grid-template-columns: 1fr; gap: 45px; }
  .section-title { display: block; }
  .section-title .section-label { margin-bottom: 45px; }
  .audience-row { grid-template-columns: 1fr; }
  .audience-image { min-height: 390px; }
  .audience-row-reverse .audience-image, .audience-row-reverse .audience-copy { grid-column: auto; grid-row: auto; }
  .audience-row-reverse .audience-image { grid-row: 1; }
  .public-service-strip { grid-template-columns: 1fr 1.2fr; }
  .public-service-strip .text-link { grid-column: 2; }
  .method-list { grid-template-columns: 1fr 1fr; }
  .method-list li:nth-child(odd) { border-left: 0; }
  .method-list li { min-height: 0; }
  .insight-item { grid-template-columns: 120px 1fr 20px; gap: 25px; }
  .opri-section { grid-template-columns: 1fr; }
  .opri-image { min-height: 430px; }
  .footer { grid-template-columns: 1fr 1fr; }
  .footer-info { grid-column: 1 / -1; }
}

@media (max-width: 560px) {
  body { font-size: 15px; }
  .site-header { padding: 0 18px; }
  .logo { width: 145px; }
  .hero { min-height: 690px; }
  .hero-shade { background: linear-gradient(90deg, rgba(4,8,20,.77), rgba(4,8,20,.24)); }
  .hero-content { left: 22px; right: 22px; bottom: 66px; }
  .hero-label { margin-bottom: 18px; font-size: .65rem; }
  .hero h1 { font-size: clamp(2.45rem, 11.7vw, 3.4rem); line-height: 1.35; }
  .hero-lead { margin: 22px 0 28px; font-size: .85rem; }
  .hero-link { min-width: 215px; padding: 14px 17px; }
  .scroll-link { display: none; }
  .about-section, .audience-section, .method-section, .insights-section { padding: 88px 20px; }
  .about-grid { margin-top: 48px; }
  .about-grid h2, .section-title h2, .opri-copy h2, .contact-inner h2 { font-size: clamp(2rem, 9vw, 3rem); line-height: 1.52; }
  .audience-section { padding-left: 0; padding-right: 0; }
  .audience-section > .section-title { padding: 0 20px; }
  .audience-row { margin-bottom: 50px; }
  .audience-image { min-height: 270px; }
  .audience-copy { padding: 38px 24px 44px; }
  .audience-copy h3 { font-size: 1.75rem; }
  .public-service-strip { grid-template-columns: 1fr; gap: 22px; margin: -5px 20px 0; padding-top: 32px; }
  .public-service-strip .text-link { grid-column: 1; white-space: normal; }
  .method-list { grid-template-columns: 1fr; }
  .method-list li, .method-list li + li { min-height: auto; padding: 24px 0 30px; border-left: 0; }
  .method-list h3 { margin: 20px 0 12px; }
  .outline-link { width: 100%; min-width: 0; }
  .insights-head { grid-template-columns: 1fr; gap: 30px; margin-bottom: 55px; }
  .insights-head .section-label { grid-column: auto; }
  .insights-head .text-link { justify-self: start; }
  .insight-item { grid-template-columns: 1fr 20px; gap: 20px; padding: 27px 0; }
  .insight-meta { grid-column: 1 / -1; flex-direction: row; justify-content: space-between; }
  .insight-item h3 { font-size: 1rem; }
  .opri-image { min-height: 290px; }
  .opri-copy { padding: 72px 20px 82px; }
  .contact-section { min-height: 540px; }
  .contact-inner h2 br { display: none; }
  .footer { grid-template-columns: 1fr; gap: 40px; padding: 64px 20px 24px; }
  .footer-info { grid-column: auto; }
  .footer-bottom { flex-direction: column; gap: 10px; }
  .footer-bottom span { margin-right: 0; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { animation-duration: .01ms !important; transition-duration: .01ms !important; }
  .fade { opacity: 1; transform: none; }
}