:root {
  --ink: #20362f;
  --ink-soft: #53645e;
  --paper: #f7f3e8;
  --paper-deep: #eee8da;
  --white: #fffdf8;
  --lake: #8db9b6;
  --lake-deep: #397f79;
  --sun: #ec9d63;
  --green: #2e6a54;
  --line: rgba(32, 54, 47, 0.17);
  --shadow: 0 22px 60px rgba(43, 63, 55, 0.1);
  --radius: 30px;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  color: var(--ink);
  background: var(--paper);
  font-family: "Yu Gothic", "Hiragino Kaku Gothic ProN", "Noto Sans JP", sans-serif;
  line-height: 1.85;
  letter-spacing: 0.025em;
}
body.menu-open { overflow: hidden; }
a { color: inherit; text-decoration: none; }
button { font: inherit; }

.skip-link {
  position: fixed;
  top: 8px;
  left: 8px;
  z-index: 999;
  padding: 10px 16px;
  transform: translateY(-150%);
  background: var(--ink);
  color: white;
  border-radius: 8px;
}
.skip-link:focus { transform: translateY(0); }
.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;
}

.site-header {
  position: fixed;
  inset: 0 0 auto;
  z-index: 100;
  border-bottom: 1px solid transparent;
  transition: background 0.25s ease, border-color 0.25s ease, backdrop-filter 0.25s ease;
}
.site-header.scrolled {
  background: rgba(247, 243, 232, 0.9);
  border-color: var(--line);
  backdrop-filter: blur(14px);
}
.header-inner {
  width: min(1180px, calc(100% - 48px));
  height: 86px;
  margin: auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
}
.brand {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  font-family: "Yu Mincho", "Hiragino Mincho ProN", serif;
  font-size: 1.24rem;
  font-weight: 700;
  letter-spacing: 0.09em;
}
.brand-mark {
  position: relative;
  width: 31px;
  height: 31px;
  display: inline-block;
  border-radius: 50%;
  background: var(--sun);
  overflow: hidden;
}
.brand-mark span {
  position: absolute;
  left: -4px;
  width: 39px;
  height: 9px;
  border: 2px solid var(--paper);
  border-color: var(--paper) transparent transparent;
  border-radius: 50%;
}
.brand-mark span:nth-child(1) { top: 13px; }
.brand-mark span:nth-child(2) { top: 18px; }
.brand-mark span:nth-child(3) { top: 23px; }
.desktop-nav { display: flex; align-items: center; gap: 30px; font-size: 0.88rem; font-weight: 600; }
.desktop-nav a { transition: color 0.2s ease; }
.desktop-nav a:hover { color: var(--lake-deep); }
.desktop-nav .nav-cta {
  padding: 10px 19px;
  border: 1px solid var(--ink);
  border-radius: 999px;
}
.menu-button, .mobile-nav { display: none; }

.hero {
  min-height: 760px;
  height: min(940px, 100svh);
  position: relative;
  display: grid;
  align-items: center;
  overflow: hidden;
  padding-top: 86px;
}
.hero-inner {
  width: min(1180px, calc(100% - 48px));
  margin: auto;
  display: grid;
  grid-template-columns: 1.02fr 0.98fr;
  align-items: center;
  gap: 4vw;
}
.eyebrow {
  margin: 0 0 22px;
  color: var(--lake-deep);
  font-size: 0.72rem;
  font-weight: 800;
  letter-spacing: 0.22em;
}
.hero h1, .section h2 {
  margin: 0;
  font-family: "Yu Mincho", "Hiragino Mincho ProN", serif;
  font-weight: 600;
  letter-spacing: 0.04em;
  line-height: 1.42;
}
.hero h1 { font-size: clamp(2.7rem, 5vw, 5rem); }
.hero h1 span { color: var(--lake-deep); background: linear-gradient(transparent 70%, rgba(141, 185, 182, 0.25) 0); }
.hero-lead { max-width: 580px; margin: 30px 0; color: var(--ink-soft); font-size: 1.05rem; }
.hero-actions { display: flex; flex-wrap: wrap; gap: 12px; }
.button {
  min-height: 56px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 18px;
  padding: 14px 24px;
  border-radius: 999px;
  font-weight: 700;
  font-size: 0.93rem;
  transition: transform 0.2s ease, box-shadow 0.2s ease, background 0.2s ease;
}
.button:hover { transform: translateY(-2px); box-shadow: 0 12px 25px rgba(32, 54, 47, 0.12); }
.button-primary { background: var(--green); color: #fff; }
.button-secondary { border: 1px solid var(--ink); }
.availability-note { margin: 18px 0 0; color: var(--ink-soft); font-size: 0.78rem; }

.hero-visual {
  position: relative;
  aspect-ratio: 1 / 1.02;
  max-height: 620px;
  border-radius: 48% 48% 50% 45%;
  overflow: hidden;
  background: #d7e6df;
  box-shadow: var(--shadow);
}
.sun { position: absolute; width: 17%; aspect-ratio: 1; border-radius: 50%; background: var(--sun); top: 14%; right: 17%; }
.land { position: absolute; left: -10%; width: 120%; border-radius: 50% 50% 0 0; }
.land-back { height: 32%; bottom: 35%; background: #abcab9; clip-path: polygon(0 60%, 14% 42%, 27% 68%, 46% 20%, 64% 65%, 79% 31%, 100% 58%, 100% 100%, 0 100%); }
.land-front { height: 28%; bottom: 30%; background: #699780; clip-path: polygon(0 64%, 18% 35%, 36% 70%, 55% 28%, 70% 62%, 88% 20%, 100% 47%, 100% 100%, 0 100%); }
.lake { position: absolute; inset: 58% 0 0; background: var(--lake); }
.lake span { position: absolute; height: 1px; background: rgba(255,255,255,.7); }
.lake span:nth-child(1) { width: 46%; top: 18%; left: 8%; }
.lake span:nth-child(2) { width: 60%; top: 38%; right: 5%; }
.lake span:nth-child(3) { width: 38%; top: 62%; left: 18%; }
.people { position: absolute; left: 12%; right: 12%; bottom: 20%; height: 24%; }
.person { position: absolute; bottom: 0; width: 6%; height: 58%; border-radius: 999px 999px 8px 8px; background: var(--ink); }
.person::before { content: ""; position: absolute; left: 50%; top: -31%; width: 110%; aspect-ratio: 1; transform: translateX(-50%); border-radius: 50%; background: inherit; }
.person::after { content: ""; position: absolute; width: 260%; height: 16%; border-radius: 999px; top: 19%; left: -77%; background: inherit; transform: rotate(-9deg); }
.p1 { left: 20%; height: 50%; background: #e7e2d5; }
.p2 { left: 48%; height: 66%; }
.p3 { right: 18%; height: 56%; background: #f5d0a8; }
.p3::after { transform: rotate(8deg); }
.visual-label { position: absolute; right: 6%; bottom: 5%; margin: 0; padding: 8px 14px; border-radius: 999px; background: rgba(255,255,255,.8); font-size: .75rem; font-weight: 700; backdrop-filter: blur(8px); }
.visual-label span { color: var(--lake-deep); }
.hero-decor { position: absolute; border-radius: 50%; pointer-events: none; }
.hero-decor-a { width: 420px; height: 420px; left: -250px; top: 24%; border: 1px solid rgba(57,127,121,.15); }
.hero-decor-b { width: 160px; height: 160px; right: -40px; bottom: 4%; background: rgba(236,157,99,.09); }
.scroll-cue { position: absolute; left: 50%; bottom: 28px; display: flex; flex-direction: column; align-items: center; gap: 7px; font-size: .62rem; letter-spacing: .2em; transform: translateX(-50%); }
.scroll-cue i { display: block; width: 1px; height: 34px; background: var(--ink); opacity: .5; }

.section { padding: 130px 0; }
.section-inner { width: min(1120px, calc(100% - 48px)); margin: auto; }
.section h2 { font-size: clamp(2.2rem, 4.2vw, 4rem); }
.intro { background: var(--white); }
.intro-grid { display: grid; grid-template-columns: .9fr 1.1fr; gap: 10vw; align-items: start; }
.intro-copy { padding-top: 58px; }
.intro-copy > p { color: var(--ink-soft); }
.intro-copy .large-copy { margin-top: 0; color: var(--ink); font-family: "Yu Mincho", "Hiragino Mincho ProN", serif; font-size: 1.55rem; line-height: 1.8; }
.profile-line { margin: 44px 0 0; border-top: 1px solid var(--line); }
.profile-line div { display: grid; grid-template-columns: 120px 1fr; padding: 15px 0; border-bottom: 1px solid var(--line); }
.profile-line dt { color: var(--ink-soft); font-size: .8rem; }
.profile-line dd { margin: 0; font-weight: 700; }

.activities { background: #e5efea; }
.activities-header { display: grid; grid-template-columns: 1fr .62fr; gap: 8vw; align-items: end; margin-bottom: 64px; }
.activities-header > p { margin: 0 0 10px; color: var(--ink-soft); }
.activity-list { border-top: 1px solid var(--line); }
.activity-card { display: grid; grid-template-columns: 52px 120px 1fr; gap: 24px; align-items: center; padding: 36px 18px 36px 0; border-bottom: 1px solid var(--line); }
.activity-number { align-self: start; color: var(--lake-deep); font-size: .72rem; font-weight: 800; }
.activity-icon { position: relative; width: 92px; height: 92px; border-radius: 50%; background: rgba(255,255,255,.6); }
.activity-icon span, .activity-icon::before, .activity-icon::after { content: ""; position: absolute; display: block; }
.icon-racket span { width: 31px; height: 41px; border: 2px solid var(--green); border-radius: 50%; top: 20px; left: 26px; transform: rotate(-28deg); }
.icon-racket::before { width: 2px; height: 28px; background: var(--green); top: 54px; left: 54px; transform: rotate(-28deg); }
.icon-racket::after { width: 13px; height: 10px; border: 2px solid var(--sun); border-width: 0 2px 2px; top: 29px; right: 19px; transform: rotate(22deg); }
.icon-board span { width: 46px; height: 46px; border: 2px solid var(--green); top: 23px; left: 23px; background: linear-gradient(90deg, transparent 48%, var(--green) 49%, var(--green) 51%, transparent 52%), linear-gradient(transparent 48%, var(--green) 49%, var(--green) 51%, transparent 52%); }
.icon-board::before { width: 9px; height: 9px; border-radius: 2px; background: var(--sun); top: 33px; left: 33px; }
.icon-board::after { width: 9px; height: 9px; border-radius: 2px; background: var(--green); bottom: 33px; right: 33px; }
.icon-talk span { width: 45px; height: 30px; border: 2px solid var(--green); border-radius: 50%; top: 25px; left: 18px; }
.icon-talk span::after { content: ""; position: absolute; left: 5px; bottom: -10px; width: 12px; height: 12px; border-left: 2px solid var(--green); transform: skew(-25deg); }
.icon-talk::before { width: 35px; height: 25px; border: 2px solid var(--sun); border-radius: 50%; right: 16px; bottom: 20px; }
.activity-type { margin: 0 0 5px; color: var(--lake-deep); font-size: .68rem; font-weight: 800; letter-spacing: .15em; }
.activity-card h3 { margin: 0; font-family: "Yu Mincho", "Hiragino Mincho ProN", serif; font-size: 1.5rem; }
.activity-card p:last-child { margin: 5px 0 0; color: var(--ink-soft); }
.seminar-note { margin-top: 54px; display: grid; grid-template-columns: 140px 1fr auto; gap: 28px; align-items: center; padding: 28px 32px; border-radius: 18px; background: var(--white); box-shadow: 0 14px 35px rgba(32,54,47,.07); }
.seminar-label { align-self: start; color: var(--sun); font-size: .72rem; font-weight: 800; }
.seminar-note h3 { margin: 0 0 5px; font-size: 1.1rem; }
.seminar-note p { margin: 0; color: var(--ink-soft); font-size: .88rem; }
.seminar-note a { white-space: nowrap; font-size: .84rem; font-weight: 700; border-bottom: 1px solid; }

.photo-story { background: var(--white); }
.photo-grid { display: grid; grid-template-columns: 1.1fr .9fr; gap: 8vw; align-items: center; }
.photo-placeholder { margin: 0; position: relative; aspect-ratio: 1.28; border-radius: var(--radius); overflow: hidden; background: #cbded6; }
.photo-pattern { position: absolute; inset: 0; overflow: hidden; }
.photo-pattern span { position: absolute; border-radius: 50%; border: 1px solid rgba(255,255,255,.55); }
.photo-pattern span:nth-child(1) { width: 70%; aspect-ratio: 1; left: -20%; top: 15%; }
.photo-pattern span:nth-child(2) { width: 55%; aspect-ratio: 1; right: -12%; bottom: -16%; background: rgba(57,127,121,.18); }
.photo-pattern span:nth-child(3) { width: 18%; aspect-ratio: 1; top: 18%; right: 22%; background: var(--sun); border: 0; }
.photo-pattern span:nth-child(4) { width: 80%; height: 1px; left: 10%; bottom: 25%; background: rgba(255,255,255,.8); border: 0; }
.photo-placeholder figcaption { position: absolute; left: 24px; bottom: 20px; padding: 7px 13px; border-radius: 999px; background: rgba(255,255,255,.78); color: var(--ink-soft); font-size: .72rem; }
.photo-copy p:last-child { margin: 28px 0 0; color: var(--ink-soft); }

.collaboration { background: var(--ink); color: var(--paper); }
.collaboration .eyebrow { color: #9dc9c3; }
.collaboration-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 9vw; }
.collaboration-title > p:last-child { margin: 30px 0 0; color: #c6d0cc; }
.collaboration-options { padding: 36px; border: 1px solid rgba(255,255,255,.18); border-radius: var(--radius); background: rgba(255,255,255,.035); }
.collaboration-options h3 { margin: 0 0 12px; font-size: 1rem; }
.collaboration-options ul { margin: 0; padding: 0; list-style: none; }
.collaboration-options li { display: grid; grid-template-columns: 40px 1fr; align-items: center; padding: 18px 0; border-bottom: 1px solid rgba(255,255,255,.15); }
.collaboration-options li span { color: #9dc9c3; font-size: .72rem; }
.collaboration-options li p { margin: 0; }
.condition-note { margin: 22px 0; color: #aebdb7; font-size: .8rem; }
.text-link { display: inline-flex; gap: 18px; align-items: center; padding-bottom: 4px; border-bottom: 1px solid #fff; font-weight: 700; }

.contact { background: var(--paper-deep); }
.contact-heading { text-align: center; margin-bottom: 50px; }
.contact-heading .eyebrow { margin-bottom: 12px; }
.contact-heading p:last-child { color: var(--ink-soft); }
.contact-cards { display: grid; grid-template-columns: 1fr 1fr; gap: 22px; }
.contact-card { padding: 46px; border-radius: var(--radius); background: var(--white); box-shadow: var(--shadow); }
.contact-card.partner { background: #dfeae4; }
.contact-kicker { margin: 0 0 18px; color: var(--lake-deep); font-size: .68rem; font-weight: 800; letter-spacing: .16em; }
.contact-card h3 { margin: 0; font-family: "Yu Mincho", "Hiragino Mincho ProN", serif; font-size: 1.8rem; }
.contact-card > p:not(.contact-kicker) { min-height: 88px; color: var(--ink-soft); }
.contact-card .button { width: 100%; margin-top: 10px; }
.button-line { background: #3a785d; color: white; }
.button-mail { background: var(--ink); color: white; }
.contact-card small { display: block; margin-top: 14px; color: var(--ink-soft); font-size: .72rem; text-align: center; }

.site-footer { padding: 70px 0 28px; background: #172923; color: #e7ece9; }
.footer-inner, .footer-bottom { width: min(1120px, calc(100% - 48px)); margin: auto; }
.footer-inner { display: flex; justify-content: space-between; gap: 40px; }
.footer-brand .brand-mark span { border-top-color: #172923; }
.footer-inner > div:first-child > p { color: #93a69f; font-size: .82rem; }
.footer-info { display: grid; align-content: start; gap: 6px; font-size: .82rem; }
.footer-info p { margin: 0; }
.footer-info p span { display: inline-block; min-width: 60px; color: #93a69f; }
.footer-info a { text-decoration: underline; text-underline-offset: 4px; }
.footer-bottom { margin-top: 56px; padding-top: 20px; display: flex; justify-content: space-between; border-top: 1px solid rgba(255,255,255,.12); color: #879a93; font-size: .68rem; }
.mobile-actions { display: none; }

.reveal { opacity: 0; transform: translateY(20px); transition: opacity .7s ease, transform .7s ease; }
.reveal.is-visible { opacity: 1; transform: translateY(0); }

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

@media (max-width: 860px) {
  .desktop-nav { display: none; }
  .menu-button { width: 44px; height: 44px; display: grid; place-content: center; gap: 7px; border: 0; background: transparent; cursor: pointer; }
  .menu-button span:not(.sr-only) { width: 25px; height: 2px; background: var(--ink); transition: transform .2s ease; }
  .menu-button[aria-expanded="true"] span:nth-child(2) { transform: translateY(4.5px) rotate(45deg); }
  .menu-button[aria-expanded="true"] span:nth-child(3) { transform: translateY(-4.5px) rotate(-45deg); }
  .mobile-nav { position: fixed; inset: 78px 0 auto; padding: 24px; display: grid; gap: 5px; background: var(--paper); border-top: 1px solid var(--line); border-bottom: 1px solid var(--line); box-shadow: 0 20px 30px rgba(32,54,47,.08); }
  .mobile-nav[hidden] { display: none; }
  .mobile-nav a { padding: 12px 0; border-bottom: 1px solid var(--line); font-weight: 700; }
  .hero { height: auto; min-height: 0; padding: 140px 0 85px; }
  .hero-inner { grid-template-columns: 1fr; gap: 55px; }
  .hero-visual { width: min(100%, 580px); margin: auto; aspect-ratio: 1.12; }
  .scroll-cue { display: none; }
  .intro-grid, .activities-header, .photo-grid, .collaboration-grid { grid-template-columns: 1fr; gap: 48px; }
  .intro-copy { padding-top: 0; }
  .activities-header { align-items: start; }
  .seminar-note { grid-template-columns: 1fr; gap: 12px; }
  .photo-copy { order: -1; }
}

@media (max-width: 620px) {
  body { padding-bottom: 66px; }
  .header-inner, .hero-inner, .section-inner, .footer-inner, .footer-bottom { width: min(100% - 36px, 1120px); }
  .header-inner { height: 76px; }
  .brand { font-size: 1.07rem; }
  .hero { padding-top: 122px; }
  .hero h1 { font-size: clamp(2.45rem, 11vw, 3.4rem); }
  .hero-lead { font-size: .94rem; }
  .hero-actions { display: grid; }
  .button { width: 100%; }
  .section { padding: 90px 0; }
  .section h2 { font-size: clamp(2rem, 9vw, 2.8rem); }
  .activity-card { grid-template-columns: 35px 68px 1fr; gap: 12px; padding-right: 0; }
  .activity-icon { width: 62px; height: 62px; transform: scale(.73); transform-origin: center; }
  .activity-card h3 { font-size: 1.15rem; }
  .activity-card p:last-child { font-size: .81rem; line-height: 1.65; }
  .seminar-note { padding: 24px; }
  .collaboration-options, .contact-card { padding: 28px 24px; }
  .contact-cards { grid-template-columns: 1fr; }
  .contact-card > p:not(.contact-kicker) { min-height: 0; }
  .footer-inner { display: grid; }
  .footer-bottom { margin-top: 40px; }
  .mobile-actions { position: fixed; left: 0; right: 0; bottom: 0; z-index: 90; display: grid; grid-template-columns: 1fr 1fr; padding: 8px; background: rgba(247,243,232,.94); border-top: 1px solid var(--line); backdrop-filter: blur(14px); }
  .mobile-actions a { display: grid; place-items: center; min-height: 48px; font-size: .8rem; font-weight: 800; }
  .mobile-actions a:first-child { background: var(--green); color: white; border-radius: 999px; }
}