@import url("https://fonts.googleapis.com/css2?family=Noto+Sans+JP:wght@400;500;600;700&family=Inter:wght@500;600;700&display=swap");

:root {
  --navy: #0b1f3a;
  --navy-soft: #122b4d;
  --blue: #1677ff;
  --cyan: #19b5d8;
  --white: #ffffff;
  --mist: #f5f7fa;
  --ink: #263238;
  --muted: #64748b;
  --line: #dce4ed;
  --shadow: 0 24px 70px rgba(11, 31, 58, 0.12);
  --radius-lg: 28px;
  --radius-md: 18px;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  color: var(--ink);
  background: var(--white);
  font-family: "Noto Sans JP", "BIZ UDPGothic", system-ui, sans-serif;
  font-size: 16px;
  line-height: 1.85;
  -webkit-font-smoothing: antialiased;
}
a { color: inherit; }
button, a { -webkit-tap-highlight-color: transparent; }
.sr-only {
  position: absolute; width: 1px; height: 1px; padding: 0; margin: -1px;
  overflow: hidden; clip: rect(0, 0, 0, 0); white-space: nowrap; border: 0;
}
.skip-link { position: fixed; top: 10px; left: 10px; z-index: 1000; transform: translateY(-160%); padding: 10px 16px; background: var(--white); color: var(--navy); border-radius: 8px; }
.skip-link:focus { transform: none; }

.site-header {
  position: sticky; top: 0; z-index: 100;
  border-bottom: 1px solid rgba(220, 228, 237, 0.75);
  background: rgba(255, 255, 255, 0.92);
  backdrop-filter: blur(14px);
}
.header-inner { width: min(1180px, calc(100% - 48px)); height: 78px; margin: 0 auto; display: flex; align-items: center; justify-content: space-between; }
.brand { display: inline-flex; align-items: center; gap: 12px; color: var(--navy); font-family: Inter, "Noto Sans JP", sans-serif; font-size: 15px; font-weight: 700; letter-spacing: .13em; text-decoration: none; }
.brand-mark { width: 18px; height: 18px; border: 5px solid var(--navy); border-top-color: var(--cyan); border-right-color: var(--blue); transform: rotate(45deg); }
.primary-nav { display: flex; align-items: center; gap: 32px; }
.primary-nav a { color: #415166; font-size: 13px; font-weight: 600; text-decoration: none; transition: color .2s ease; }
.primary-nav a:hover, .primary-nav a:focus-visible { color: var(--blue); }
.primary-nav .nav-contact { padding: 10px 18px; color: var(--white); background: var(--navy); border-radius: 999px; }
.primary-nav .nav-contact:hover, .primary-nav .nav-contact:focus-visible { color: var(--white); background: var(--blue); }
.menu-button { display: none; width: 44px; height: 44px; padding: 11px; border: 0; background: transparent; }
.menu-button > span:not(.sr-only) { display: block; height: 2px; margin: 5px 0; background: var(--navy); }

.hero { position: relative; overflow: hidden; padding: 104px 0 0; background: linear-gradient(135deg, #f8fbff 0%, #fff 48%, #eef8fb 100%); }
.hero::before { content: ""; position: absolute; inset: 0; opacity: .35; background-image: linear-gradient(rgba(22,119,255,.06) 1px, transparent 1px), linear-gradient(90deg, rgba(22,119,255,.06) 1px, transparent 1px); background-size: 64px 64px; mask-image: linear-gradient(to bottom, black, transparent 90%); }
.hero-glow { position: absolute; width: 420px; height: 420px; border-radius: 50%; filter: blur(80px); opacity: .14; }
.hero-glow-one { top: -210px; right: 4%; background: var(--blue); }
.hero-glow-two { bottom: -220px; left: -80px; background: var(--cyan); }
.hero-inner { position: relative; width: min(1180px, calc(100% - 48px)); margin: 0 auto; display: grid; grid-template-columns: 1.05fr .95fr; gap: 70px; align-items: center; }
.eyebrow { margin: 0 0 18px; color: var(--blue); font-family: Inter, "Noto Sans JP", sans-serif; font-size: 12px; font-weight: 700; letter-spacing: .2em; }
.hero h1 { margin: 0; color: var(--navy); font-size: clamp(44px, 5.1vw, 74px); line-height: 1.24; letter-spacing: -.045em; }
.hero h1 span { position: relative; }
.hero h1 span::after { content: ""; position: absolute; left: 2px; right: 0; bottom: -8px; height: 4px; background: linear-gradient(90deg, var(--blue), var(--cyan)); border-radius: 999px; }
.hero-lead { max-width: 680px; margin: 36px 0 0; color: #40536a; font-size: 17px; line-height: 2; }
.hero-actions { display: flex; gap: 14px; margin-top: 34px; }
.button { display: inline-flex; min-height: 52px; padding: 0 26px; align-items: center; justify-content: center; border: 1px solid transparent; border-radius: 999px; font-size: 14px; font-weight: 700; text-decoration: none; transition: transform .2s ease, box-shadow .2s ease, background .2s ease; }
.button:hover, .button:focus-visible { transform: translateY(-2px); }
.button-primary { color: var(--white); background: var(--blue); box-shadow: 0 12px 28px rgba(22, 119, 255, .22); }
.button-primary:hover, .button-primary:focus-visible { background: #0968e5; }
.button-secondary { color: var(--navy); border-color: #bdc9d8; background: rgba(255,255,255,.7); }
.hero-note { margin: 22px 0 0; color: var(--muted); font-size: 12px; }
.hero-principle { max-width: 650px; margin: 20px 0 0; padding: 14px 16px; display: grid; gap: 3px; border-left: 3px solid var(--cyan); border-radius: 0 10px 10px 0; color: #4f6379; background: rgba(255,255,255,.62); font-size: 11px; line-height: 1.75; }
.hero-principle strong { color: var(--navy); font-size: 12px; }
.hero-principle span { display: block; }
.hero-model { position: relative; padding: 24px; border: 1px solid rgba(185, 205, 226, .7); border-radius: var(--radius-lg); background: rgba(255,255,255,.82); box-shadow: var(--shadow); backdrop-filter: blur(12px); }
.model-header { display: flex; justify-content: space-between; padding-bottom: 18px; border-bottom: 1px solid var(--line); color: #69798b; font-family: Inter, sans-serif; font-size: 10px; font-weight: 700; letter-spacing: .16em; }
.status { display: flex; align-items: center; gap: 7px; color: #27664a; letter-spacing: .03em; }
.status i { width: 8px; height: 8px; border-radius: 50%; background: #41b67a; box-shadow: 0 0 0 4px rgba(65,182,122,.12); }
.model-flow { display: grid; gap: 10px; margin: 18px 0; padding: 0; list-style: none; }
.model-flow li { display: grid; grid-template-columns: 42px 1fr; align-items: center; padding: 15px; border: 1px solid #e2e9f1; border-radius: 14px; background: #fbfdff; }
.model-flow li:nth-child(2) { margin-left: 16px; border-color: rgba(22,119,255,.25); }
.model-flow li:nth-child(3) { margin-left: 32px; border-color: rgba(25,181,216,.28); }
.step-no { color: var(--blue); font: 700 11px/1 Inter, sans-serif; }
.model-flow strong, .model-flow small { display: block; }
.model-flow strong { color: var(--navy); font-size: 14px; }
.model-flow small { margin-top: 2px; color: var(--muted); font-size: 10px; }
.model-result { display: flex; align-items: center; justify-content: center; gap: 18px; padding: 14px; color: #68798d; border-radius: 12px; background: var(--navy); font-size: 12px; }
.model-result b { color: var(--cyan); }
.model-result strong { color: var(--white); font-size: 14px; }
.hero-proof { position: relative; width: min(1180px, calc(100% - 48px)); margin: 92px auto 0; display: grid; grid-template-columns: repeat(3, 1fr); border-top: 1px solid var(--line); }
.hero-proof div { padding: 26px 28px; border-right: 1px solid var(--line); }
.hero-proof div:last-child { border: 0; }
.hero-proof b, .hero-proof span { display: block; }
.hero-proof b { color: var(--navy); font-family: Inter, "Noto Sans JP", sans-serif; font-size: 14px; }
.hero-proof span { margin-top: 4px; color: var(--muted); font-size: 11px; }

.section { padding: 120px 0; }
.section-inner { width: min(1120px, calc(100% - 48px)); margin: 0 auto; }
.section-heading { max-width: 540px; }
.section-heading.centered { max-width: 760px; margin: 0 auto 54px; text-align: center; }
.section-heading h2 { margin: 0; color: var(--navy); font-size: clamp(32px, 4vw, 48px); line-height: 1.4; letter-spacing: -.035em; }
.section-heading > p:last-child { margin: 24px 0 0; color: var(--muted); font-size: 15px; }
.challenges .section-inner { display: grid; grid-template-columns: .82fr 1.18fr; gap: 100px; }
.challenge-list { margin: 0; padding: 0; list-style: none; border-top: 1px solid var(--line); }
.challenge-list li { display: grid; grid-template-columns: 48px 1fr; gap: 14px; align-items: start; padding: 21px 0; border-bottom: 1px solid var(--line); }
.challenge-list span { padding-top: 4px; color: var(--blue); font: 700 11px/1.4 Inter, sans-serif; }
.challenge-list p { margin: 0; color: #34465b; font-size: 14px; font-weight: 500; line-height: 1.75; }
.transition-band { padding: 82px 24px; color: var(--white); background: var(--navy); text-align: center; }
.transition-band p { margin: 0 0 16px; color: #8eddf0; font-size: 12px; font-weight: 700; letter-spacing: .08em; }
.transition-band h2 { margin: 0; font-size: clamp(28px, 4vw, 43px); line-height: 1.5; letter-spacing: -.025em; }
.services { background: var(--mist); }
.service-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 18px; }
.service-card { position: relative; min-height: 320px; padding: 38px; overflow: hidden; border: 1px solid #e1e7ef; border-radius: var(--radius-md); background: var(--white); }
.service-card::after { content: ""; position: absolute; width: 130px; height: 130px; right: -65px; bottom: -65px; border: 22px solid rgba(22,119,255,.05); border-radius: 50%; }
.service-card-featured { color: var(--white); border-color: var(--navy); background: var(--navy); }
.service-card-featured::after { border-color: rgba(25,181,216,.17); }
.service-number { position: absolute; top: 32px; right: 34px; color: #c4cfda; font: 700 12px/1 Inter, sans-serif; }
.service-card-featured .service-number { color: #6b8aab; }
.service-label { margin: 0 0 20px; color: var(--blue); font: 700 10px/1.4 Inter, sans-serif; letter-spacing: .18em; }
.service-card-featured .service-label { color: var(--cyan); }
.service-card h3 { margin: 0; color: var(--navy); font-size: 25px; line-height: 1.5; }
.service-card-featured h3 { color: var(--white); }
.service-card > p:last-child { max-width: 460px; margin: 28px 0 0; color: var(--muted); font-size: 13px; }
.service-card-featured > p:last-child { color: #b8c7d9; }
.strengths { overflow: hidden; }
.strengths-layout { display: grid; grid-template-columns: .85fr 1.15fr; gap: 110px; align-items: start; }
.strengths .section-heading { position: sticky; top: 130px; }
.strength-list { border-top: 1px solid var(--line); }
.strength-list article { display: grid; grid-template-columns: 54px 1fr; gap: 14px; padding: 28px 0; border-bottom: 1px solid var(--line); }
.strength-list article > span { color: var(--cyan); font: 700 12px/1.6 Inter, sans-serif; }
.strength-list h3 { margin: 0; color: var(--navy); font-size: 17px; }
.strength-list p { margin: 10px 0 0; color: var(--muted); font-size: 13px; }
.process { background: #f9fbfd; }
.process-list { display: grid; grid-template-columns: repeat(5, 1fr); margin: 0; padding: 0; list-style: none; counter-reset: process; }
.process-list li { position: relative; min-height: 220px; padding: 24px 22px; border-left: 1px solid var(--line); }
.process-list li:last-child { border-right: 1px solid var(--line); }
.process-list li::after { content: ""; position: absolute; top: 38px; right: -4px; z-index: 2; width: 7px; height: 7px; border-top: 1px solid var(--blue); border-right: 1px solid var(--blue); transform: rotate(45deg); background: #f9fbfd; }
.process-list li:last-child::after { display: none; }
.process-list span, .process-list strong, .process-list small { display: block; }
.process-list span { margin-bottom: 50px; color: var(--blue); font: 700 12px/1 Inter, sans-serif; }
.process-list strong { color: var(--navy); font-size: 15px; line-height: 1.65; }
.process-list small { margin-top: 14px; color: var(--muted); font-size: 11px; line-height: 1.7; }
.profile { background: var(--white); }
.profile-layout { display: grid; grid-template-columns: .78fr 1.22fr; gap: 86px; align-items: center; }
.profile-visual { position: relative; min-height: 520px; overflow: hidden; border-radius: 28px; color: var(--white); background: var(--navy); box-shadow: var(--shadow); }
.profile-visual::after { content: ""; position: absolute; inset: 0; background: linear-gradient(to top, rgba(7,23,44,.7), transparent 38%); pointer-events: none; }
.profile-visual img { position: absolute; inset: 0; width: 100%; height: 100%; object-fit: cover; object-position: 50% 24%; }
.profile-image-label { position: absolute; left: 34px; bottom: 30px; z-index: 1; display: flex; align-items: center; gap: 9px; color: var(--white); font: 600 10px/1 Inter, sans-serif; letter-spacing: .14em; }
.profile-image-label span { width: 24px; height: 2px; background: var(--cyan); }
.profile-copy h2 { margin: 0; color: var(--navy); font: 700 clamp(32px, 4vw, 50px)/1.2 Inter, sans-serif; letter-spacing: -.03em; }
.profile-ja { margin: 12px 0 0; color: var(--muted); font-size: 12px; }
.profile-title { margin: 26px 0 0; color: var(--navy); font-size: 15px; font-weight: 700; line-height: 1.7; }
.profile-body { margin-top: 28px; padding-top: 24px; border-top: 1px solid var(--line); }
.profile-body p { margin: 0 0 14px; color: #536579; font-size: 13px; }
.expertise { display: flex; flex-wrap: wrap; gap: 8px; margin: 24px 0 0; padding: 0; list-style: none; }
.expertise li { padding: 7px 12px; color: #3d5875; border: 1px solid #d7e0ea; border-radius: 999px; background: #fbfdff; font-size: 10px; font-weight: 600; }
.contact { padding: 110px 24px; color: var(--white); background: linear-gradient(135deg, #0b1f3a, #102e50); text-align: center; }
.contact-inner { max-width: 760px; margin: 0 auto; }
.contact .eyebrow { color: var(--cyan); }
.contact h2 { margin: 0; font-size: clamp(32px, 4.4vw, 50px); line-height: 1.5; }
.contact p:not(.eyebrow) { margin: 26px auto 34px; color: #b9c9d9; font-size: 14px; }
.button-light { color: var(--navy); background: var(--white); }
.contact small { display: block; margin-top: 22px; color: #8ba2b9; font-size: 10px; }
.site-footer { padding: 52px max(24px, calc((100% - 1120px) / 2)); color: #bac8d6; background: #07172c; }
.footer-main { display: flex; align-items: center; gap: 32px; padding-bottom: 38px; border-bottom: 1px solid rgba(255,255,255,.1); }
.footer-brand { color: var(--white); }
.footer-brand .brand-mark { border-left-color: var(--white); border-bottom-color: var(--white); }
.footer-main > p { margin: 0 auto 0 0; color: #7890aa; font-size: 11px; }
.footer-main nav { display: flex; gap: 24px; }
.footer-main nav a { font-size: 11px; text-decoration: none; }
.footer-main nav a:hover, .footer-main nav a:focus-visible { color: var(--white); }
.footer-bottom { display: flex; justify-content: space-between; padding-top: 24px; font-size: 10px; }

.reveal { opacity: 0; transform: translateY(18px); transition: opacity .65s ease, transform .65s ease; }
.reveal.is-visible { opacity: 1; transform: none; }
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .reveal { opacity: 1; transform: none; transition: none; }
  .button { transition: none; }
}

@media (max-width: 900px) {
  .header-inner { width: min(100% - 36px, 760px); height: 70px; }
  .menu-button { display: block; }
  .primary-nav { position: absolute; top: 70px; left: 0; right: 0; display: none; padding: 20px 24px 28px; flex-direction: column; align-items: stretch; gap: 0; border-bottom: 1px solid var(--line); background: var(--white); box-shadow: 0 20px 35px rgba(11,31,58,.08); }
  .primary-nav.is-open { display: flex; }
  .primary-nav a { padding: 13px 0; }
  .primary-nav .nav-contact { margin-top: 8px; text-align: center; }
  .hero { padding-top: 78px; }
  .hero-inner { grid-template-columns: 1fr; gap: 54px; }
  .hero-model { max-width: 620px; }
  .hero-proof { margin-top: 72px; }
  .challenges .section-inner, .strengths-layout, .profile-layout { grid-template-columns: 1fr; gap: 54px; }
  .strengths .section-heading { position: static; }
  .process-list { grid-template-columns: 1fr 1fr; gap: 14px; }
  .process-list li, .process-list li:last-child { min-height: 190px; border: 1px solid var(--line); border-radius: 14px; }
  .process-list li::after { display: none; }
  .process-list span { margin-bottom: 30px; }
  .profile-visual { max-width: 520px; min-height: 560px; }
  .footer-main { align-items: flex-start; flex-wrap: wrap; }
  .footer-main > p { width: calc(100% - 250px); }
  .footer-main nav { width: 100%; flex-wrap: wrap; }
}

@media (max-width: 620px) {
  body { font-size: 15px; }
  .header-inner, .hero-inner, .hero-proof, .section-inner { width: min(100% - 36px, 520px); }
  .brand { gap: 10px; font-size: 12px; }
  .brand-mark { width: 15px; height: 15px; border-width: 4px; }
  .hero { padding-top: 64px; }
  .hero h1 { font-size: clamp(38px, 12vw, 50px); line-height: 1.32; }
  .hero-lead { font-size: 15px; line-height: 1.9; }
  .hero-actions { flex-direction: column; align-items: stretch; }
  .hero-note { font-size: 11px; }
  .hero-model { padding: 16px; border-radius: 20px; }
  .model-flow li:nth-child(2), .model-flow li:nth-child(3) { margin-left: 0; }
  .hero-proof { grid-template-columns: 1fr; padding: 18px 0; }
  .hero-proof div { padding: 14px 4px; border-right: 0; border-bottom: 1px solid var(--line); }
  .hero-proof div:last-child { border-bottom: 0; }
  .section { padding: 86px 0; }
  .section-heading.centered { text-align: left; }
  .section-heading h2 { font-size: 32px; }
  .challenges .section-inner { gap: 42px; }
  .service-grid { grid-template-columns: 1fr; }
  .service-card { min-height: auto; padding: 30px 26px; }
  .process-list { grid-template-columns: 1fr; }
  .process-list li { min-height: auto; padding: 24px; }
  .process-list span { margin-bottom: 18px; }
  .profile-visual { min-height: 430px; }
  .profile-image-label { left: 26px; bottom: 24px; }
  .contact { padding: 84px 24px; }
  .contact h2 { font-size: 31px; }
  .footer-main { display: block; }
  .footer-main > p { width: auto; margin: 14px 0 26px; }
  .footer-main nav { display: grid; grid-template-columns: 1fr 1fr; gap: 14px; }
  .footer-bottom { gap: 18px; flex-direction: column; }
}