:root {
  --ink: #202422;
  --muted: #667069;
  --concrete: #eceeea;
  --line: #d7dbd6;
  --paper: #f9faf7;
  --white: #fff;
  --green: #1f4b3a;
  --green-light: #d8e2dc;
  --max: 1180px;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; overflow-x: hidden; }
body { margin: 0; color: var(--ink); background: var(--paper); font-family: "Yu Gothic", "Hiragino Kaku Gothic ProN", "Noto Sans JP", sans-serif; line-height: 1.8; overflow-x: hidden; }
img { display: block; width: 100%; height: 100%; object-fit: cover; }
a { color: inherit; text-decoration: none; }
button { font: inherit; }
.skip-link { position: fixed; left: 1rem; top: -5rem; z-index: 200; padding: .7rem 1rem; background: var(--ink); color: white; }
.skip-link:focus { top: 1rem; }
.eyebrow { margin: 0 0 1rem; color: var(--green); font: 700 .72rem/1.2 Arial, sans-serif; letter-spacing: .22em; }
.pc-only { display: inline; }

.site-header { position: fixed; inset: 0 0 auto; z-index: 100; background: rgba(249,250,247,.92); border-bottom: 1px solid rgba(32,36,34,.1); backdrop-filter: blur(14px); }
.header-inner { max-width: 1280px; height: 82px; margin: auto; padding: 0 4vw; display: flex; align-items: center; justify-content: space-between; }
.brand { display: inline-flex; align-items: center; gap: .8rem; }
.brand-mark { display: grid; place-items: center; width: 42px; height: 42px; color: white; background: var(--green); font: 700 1.25rem/1 "Yu Mincho", serif; }
.brand-copy { display: grid; line-height: 1.1; }
.brand-copy strong { font-size: 1rem; letter-spacing: .08em; }
.brand-copy small { margin-top: .35rem; font: 600 .58rem/1 Arial, sans-serif; letter-spacing: .2em; color: var(--muted); }
.site-nav { display: flex; align-items: center; gap: 2rem; font-weight: 700; font-size: .8rem; }
.site-nav a:not(.nav-cta) { position: relative; }
.site-nav a:not(.nav-cta)::after { content: ""; position: absolute; left: 0; bottom: -.45rem; width: 0; height: 1px; background: var(--green); transition: width .25s ease; }
.site-nav a:hover::after { width: 100%; }
.nav-cta { padding: .7rem 1.2rem; border: 1px solid var(--green); color: var(--green); }
.menu-button { display: none; padding: .5rem; border: 0; background: transparent; }
.menu-button span { display: block; width: 25px; height: 2px; margin: 5px 0; background: var(--ink); transition: .25s; }

.hero { max-width: 1440px; min-height: 760px; margin: auto; padding: 142px 5vw 70px; display: grid; grid-template-columns: .88fr 1.12fr; align-items: center; gap: clamp(3rem, 7vw, 8rem); }
.hero-copy { padding-left: clamp(0rem, 4vw, 3.5rem); }
.hero h1 { margin: 0; font-family: "Yu Mincho", "Hiragino Mincho ProN", serif; font-size: clamp(3.2rem, 4vw, 4.8rem); font-weight: 500; line-height: 1.13; letter-spacing: -.04em; }
.hero h1 span { color: var(--green); }
.hero-lead { margin: 2rem 0 2.2rem; font-weight: 600; font-size: clamp(.95rem, 1.3vw, 1.08rem); }
.hero-actions { display: flex; align-items: center; gap: 1.8rem; flex-wrap: wrap; }
.button { display: inline-flex; align-items: center; justify-content: center; gap: 1.4rem; min-height: 58px; padding: .9rem 1.7rem; border: 1px solid transparent; font-weight: 700; font-size: .9rem; transition: transform .2s ease, background .2s ease; }
.button:hover { transform: translateY(-2px); }
.button-primary { color: white; background: var(--green); }
.button-primary:hover { background: #173b2e; }
.button-light { color: var(--green); background: white; }
.text-link { border-bottom: 1px solid var(--ink); font-size: .86rem; font-weight: 700; }
.hero-facts { display: flex; gap: 2.4rem; margin-top: 3.2rem; padding-top: 1.2rem; border-top: 1px solid var(--line); }
.hero-facts div { display: grid; }
.hero-facts strong { font: 500 1.55rem/1.3 "Yu Mincho", serif; }
.hero-facts span { color: var(--muted); font-size: .72rem; }
.hero-visual { position: relative; height: min(68vw, 610px); min-height: 520px; }
.hero-main, .hero-sub { position: absolute; margin: 0; overflow: hidden; background: var(--concrete); }
.hero-main { inset: 0 12% 0 6%; }
.hero-sub { width: 37%; height: 48%; right: 0; bottom: -4%; border: 8px solid var(--paper); }
.hero-main img { filter: saturate(.82) contrast(1.02); }
.hero-label { position: absolute; left: -2%; bottom: 3%; margin: 0; color: white; font: 700 clamp(1.3rem, 2vw, 2rem)/1.05 Arial, sans-serif; letter-spacing: .12em; writing-mode: vertical-rl; }

.section { max-width: var(--max); margin: 0 auto; padding: 120px 4vw; }
.section-heading { max-width: 720px; margin-bottom: 3.5rem; }
.section h2, .partners h2, .contact h2 { margin: 0; font-family: "Yu Mincho", "Hiragino Mincho ProN", serif; font-size: clamp(2.2rem, 4.4vw, 4.2rem); font-weight: 500; line-height: 1.3; letter-spacing: -.02em; }
.section-heading > p:last-child { max-width: 620px; margin: 1.3rem 0 0; color: var(--muted); }
.service-grid { display: grid; grid-template-columns: repeat(4, 1fr); border-top: 1px solid var(--line); border-left: 1px solid var(--line); }
.service-card { min-height: 275px; padding: 2rem 1.5rem; border-right: 1px solid var(--line); border-bottom: 1px solid var(--line); transition: background .25s ease, color .25s ease; }
.service-card:hover { color: white; background: var(--green); }
.service-number { color: #8b948e; font: 700 .72rem/1 Arial, sans-serif; letter-spacing: .15em; }
.service-card:hover .service-number { color: var(--green-light); }
.service-card h3 { margin: 4.8rem 0 .8rem; font-size: 1.08rem; }
.service-card p { margin: 0; color: var(--muted); font-size: .84rem; line-height: 1.9; }
.service-card:hover p { color: rgba(255,255,255,.75); }

.works { max-width: none; padding-inline: 0; background: var(--ink); color: white; }
.works-head { max-width: var(--max); margin: 0 auto 3.6rem; padding: 0 4vw; display: grid; grid-template-columns: 1.5fr .7fr; align-items: end; gap: 3rem; }
.works .eyebrow { color: #9ab4a7; }
.works-head > p { margin: 0; color: #b8bfba; font-size: .9rem; }
.works-grid { max-width: 1320px; margin: auto; padding: 0 3vw; display: grid; grid-template-columns: repeat(4, 1fr); grid-auto-rows: 390px; gap: 1px; background: #4a504c; }
.work-card { position: relative; margin: 0; overflow: hidden; background: #333; }
.work-card img { transition: transform .6s ease, filter .6s ease; filter: saturate(.8); }
.work-card:hover img { transform: scale(1.035); filter: saturate(1); }
.work-card figcaption { position: absolute; inset: auto 0 0; padding: 2.5rem 1.2rem 1.2rem; display: flex; gap: .7rem; align-items: center; color: white; background: linear-gradient(transparent, rgba(0,0,0,.75)); font-weight: 700; font-size: .82rem; }
.work-card figcaption span { color: #aec5b9; font-size: .65rem; }
.work-wide { grid-column: span 2; }

.about { display: grid; grid-template-columns: .9fr 1.1fr; align-items: center; gap: clamp(3rem, 8vw, 7rem); }
.about-image { position: relative; height: 620px; }
.about-image::before { content: ""; position: absolute; inset: -24px 34px 34px -24px; z-index: -1; background: var(--concrete); }
.about-image span { position: absolute; left: -1rem; bottom: 2rem; padding: .7rem 1rem; color: white; background: var(--green); font: 700 .67rem/1 Arial, sans-serif; letter-spacing: .18em; }
.about-copy > p:not(.eyebrow) { margin: 2rem 0; color: var(--muted); }
.about-list { margin: 2.3rem 0 0; border-top: 1px solid var(--line); }
.about-list div { display: grid; grid-template-columns: 6rem 1fr; padding: 1rem 0; border-bottom: 1px solid var(--line); }
.about-list dt { color: var(--muted); font-size: .76rem; }
.about-list dd { margin: 0; font-weight: 700; }

.partners { position: relative; padding: 120px 6vw; overflow: hidden; color: white; background: var(--ink); }
.partners-inner { position: relative; z-index: 1; max-width: 780px; margin: auto; text-align: center; }
.partners .eyebrow { color: #a9c1b5; }
.partners p:not(.eyebrow) { max-width: 580px; margin: 1.6rem auto 2.2rem; color: #c9cfcb; }
.partners-pattern { position: absolute; inset: -50%; opacity: .12; background-image: repeating-linear-gradient(120deg, transparent 0 30px, #a8b4ad 31px 32px); transform: rotate(-4deg); }

.contact { padding: 130px 5vw; background: var(--concrete); }
.contact-inner { max-width: 900px; margin: auto; text-align: center; }
.contact-inner > p:not(.eyebrow) { margin: 1.5rem 0 2rem; color: var(--muted); }
.site-footer { padding: 50px 5vw 30px; display: grid; grid-template-columns: 1fr auto; gap: 1rem 2rem; align-items: center; color: var(--muted); border-top: 1px solid var(--line); font-size: .72rem; }
.footer-brand { color: var(--ink); }
.proposal { grid-column: 1 / -1; margin: 1.5rem 0 0; padding-top: 1.5rem; border-top: 1px solid var(--line); text-align: center; letter-spacing: .18em; }

.reveal { opacity: 0; transform: translateY(24px); transition: opacity .7s ease, transform .7s ease; }
.reveal.is-visible { opacity: 1; transform: none; }

@media (max-width: 980px) {
  .site-nav { position: fixed; inset: 82px 0 auto; padding: 2rem 6vw; display: grid; gap: 0; background: var(--paper); border-bottom: 1px solid var(--line); opacity: 0; visibility: hidden; transform: translateY(-10px); transition: .25s; }
  .site-nav.is-open { opacity: 1; visibility: visible; transform: none; }
  .site-nav a { padding: 1rem 0; border-bottom: 1px solid var(--line); }
  .site-nav .nav-cta { margin-top: 1rem; padding: .9rem 1rem; text-align: center; }
  .menu-button { display: block; }
  .hero { min-height: auto; grid-template-columns: 1fr; padding-top: 130px; }
  .hero-copy { padding: 0 4vw; }
  .hero-visual { height: 640px; }
  .hero-main { inset: 0 20% 0 4%; }
  .service-grid { grid-template-columns: repeat(2, 1fr); }
  .works-grid { grid-template-columns: repeat(2, 1fr); }
  .works-head { grid-template-columns: 1fr; }
}

@media (max-width: 680px) {
  .header-inner { height: 70px; padding: 0 5vw; }
  .brand-mark { width: 38px; height: 38px; }
  .site-nav { top: 70px; }
  .hero { padding: 112px 5vw 76px; gap: 3.2rem; }
  .hero-copy { padding: 0; }
  .hero h1 { font-size: clamp(2.7rem, 12vw, 3.4rem); }
  .hero-lead { margin: 1.5rem 0 2rem; }
  .pc-only { display: none; }
  .hero-actions { align-items: stretch; flex-direction: column; gap: 1rem; }
  .hero .button { width: 100%; }
  .text-link { align-self: flex-start; }
  .hero-facts { gap: 1.5rem; }
  .hero-visual { height: 460px; min-height: 0; }
  .hero-main { inset: 0 14% 0 0; }
  .hero-sub { width: 44%; height: 43%; right: -2%; border-width: 6px; }
  .section { padding: 86px 5vw; }
  .section-heading { margin-bottom: 2.4rem; }
  .section h2, .partners h2, .contact h2 { font-size: clamp(2rem, 10vw, 3rem); }
  .service-grid { grid-template-columns: 1fr; }
  .service-card { min-height: 230px; }
  .service-card h3 { margin-top: 3.4rem; }
  .works { padding-inline: 0; }
  .works-head { margin-bottom: 2.5rem; padding: 0 5vw; }
  .works-grid { padding: 0; grid-template-columns: 1fr 1fr; grid-auto-rows: 275px; }
  .work-wide { grid-column: span 2; }
  .work-card figcaption { padding: 2rem .8rem .9rem; font-size: .73rem; }
  .about { grid-template-columns: 1fr; gap: 4rem; }
  .about-image { height: 460px; }
  .about-image::before { inset: -16px 24px 24px -16px; }
  .partners, .contact { padding: 90px 5vw; }
  .site-footer { grid-template-columns: 1fr; text-align: center; }
  .footer-brand { justify-self: center; }
}

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