:root{
  --night:#05070c;
  --ink:#0a0d14;
  --cream:#f4ecdd;
  --cream-2:rgba(244,236,221,.66);
  --cream-3:rgba(244,236,221,.42);
  --gold:#c9a35e;
  --gold-soft:#dcc290;
  --gold-deep:#a8814a;
  --line:rgba(244,236,221,.14);
  --line-2:rgba(244,236,221,.08);
  --font-en:'Cormorant Garamond',serif;
  --font-jp:'Shippori Mincho',serif;
  --ease:cubic-bezier(.22,1,.28,1);
  --grad-1:linear-gradient(180deg,#05070c 0%,#0c1424 40%,#142038 100%);
  --grad-3:linear-gradient(180deg,#1a2848 0%,#3a2858 35%,#6a3848 70%,#a84838 100%);
}

*{margin:0;padding:0;box-sizing:border-box}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%}
body{
  font-family:var(--font-jp);color:var(--cream);background:var(--night);
  line-height:1.95;letter-spacing:.03em;-webkit-font-smoothing:antialiased;
}
[data-lang="ja"] .en-only{display:none!important}
[data-lang="en"] .jp-only{display:none!important}
::selection{background:rgba(201,163,94,.32);color:#fff}
.skip-link{position:fixed;z-index:1000;left:1rem;top:1rem;transform:translateY(-180%);padding:.75rem 1rem;background:var(--cream);color:var(--ink);font-family:var(--font-jp);text-decoration:none;transition:transform .2s var(--ease)}
.skip-link:focus{transform:translateY(0)}
:focus-visible{outline:2px solid var(--gold-soft);outline-offset:4px}

#sky{position:fixed;inset:0;z-index:-3;background:var(--grad-3)}
#grain{
  position:fixed;inset:0;z-index:-1;pointer-events:none;opacity:.045;
  background-image:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='160' height='160'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='3'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)'/%3E%3C/svg%3E");
}
#vignette{position:fixed;inset:0;z-index:-1;pointer-events:none;
  background:radial-gradient(120% 80% at 50% 38%,transparent 52%,rgba(5,7,12,.5) 100%)}

header{
  position:fixed;top:0;left:0;right:0;z-index:200;
  display:flex;align-items:center;justify-content:space-between;gap:1rem;
  padding:1.35rem clamp(1.2rem,4vw,3.2rem);transition:background .6s ease,padding .6s ease,backdrop-filter .6s;
}
header.scrolled{background:rgba(5,7,12,.58);backdrop-filter:blur(14px);padding-top:.95rem;padding-bottom:.95rem;border-bottom:1px solid var(--line-2)}
.brand{font-family:var(--font-en);font-size:clamp(.88rem,1.8vw,1.05rem);letter-spacing:.34em;text-transform:uppercase;color:var(--cream);text-decoration:none;flex-shrink:0}
.brand small{display:block;font-family:var(--font-jp);font-size:.52em;letter-spacing:.46em;color:var(--gold-soft);opacity:.85;margin-top:.35em}
.nav-links{display:flex;align-items:center;gap:clamp(.75rem,2vw,1.35rem);margin-left:auto;margin-right:clamp(.4rem,1.5vw,1rem)}
.nav-links a{
  font-family:var(--font-jp);font-size:clamp(.78rem,1.5vw,.86rem);letter-spacing:.1em;
  color:var(--cream-2);text-decoration:none;transition:color .3s;white-space:nowrap;
  display:inline-block;padding:.7em .1em;margin:-.7em -.1em;/* タップ領域拡大(視覚サイズは不変) */
}
[data-lang="en"] .nav-links a{font-family:var(--font-en);letter-spacing:.16em;text-transform:uppercase;font-size:clamp(.72rem,1.4vw,.8rem)}
.nav-links a:hover,.nav-links a.active{color:var(--gold-soft)}
.nav-right{display:flex;align-items:center;gap:clamp(.85rem,2.5vw,1.8rem);flex-shrink:0}
.lang-toggle{display:flex;align-items:center;gap:.45rem;font-family:var(--font-en);font-size:.78rem;letter-spacing:.14em}
.lang-toggle a{min-width:44px;min-height:44px;display:inline-flex;align-items:center;justify-content:center;color:var(--cream);opacity:.68;text-decoration:none;border:1px solid transparent;transition:opacity .3s,border-color .3s}
.lang-toggle a[aria-current="page"]{opacity:1;border-color:var(--gold)}
.lang-toggle span{opacity:.35}
.btn-top{
  font-family:var(--font-en);font-style:italic;font-size:.9rem;letter-spacing:.12em;color:var(--cream);
  text-decoration:none;border:1px solid var(--line);padding:.8em 1.25em;border-radius:1px;transition:all .4s var(--ease);white-space:nowrap;
  min-height:44px;display:inline-flex;align-items:center;
}
.btn-top:hover{background:var(--cream);color:var(--ink);border-color:var(--cream)}

.page-hero{
  padding:clamp(7rem,18vh,10rem) clamp(1.4rem,5vw,4.5rem) clamp(3rem,8vh,4.5rem);
  text-align:center;max-width:52rem;margin:0 auto;
}
.page-hero .kicker{font-family:var(--font-en);text-transform:uppercase;letter-spacing:.42em;font-size:.64rem;color:var(--gold);margin-bottom:1.1rem}
.page-hero h1{font-family:var(--font-en);font-weight:300;font-style:italic;font-size:clamp(2.2rem,6vw,3.8rem);line-height:1.15;margin-bottom:1rem}
[data-lang="ja"] .page-hero h1{font-family:var(--font-jp);font-style:normal;letter-spacing:.06em}
.page-hero .lead{font-family:var(--font-jp);font-weight:300;font-size:clamp(.92rem,1.8vw,1.04rem);line-height:2.15;color:var(--cream-2);text-wrap:pretty}
[data-lang="en"] .page-hero .lead{font-family:var(--font-en);font-style:italic;letter-spacing:.02em;line-height:1.85}

.page-main{max-width:760px;margin:0 auto;padding:0 clamp(1.4rem,5vw,4.5rem) clamp(5rem,12vh,8rem)}

.route-card{
  display:grid;grid-template-columns:1fr auto 1fr;align-items:center;gap:1rem;
  margin:0 0 clamp(2.8rem,6vh,4rem);padding:1.6rem 1.4rem;
  border:1px solid var(--line);background:rgba(5,7,12,.45);
}
.route-card .node{text-align:center}
.route-card .node b{display:block;font-family:var(--font-en);font-size:clamp(1.4rem,4vw,2rem);letter-spacing:.12em;color:var(--cream)}
.route-card .node span{display:block;font-family:var(--font-jp);font-size:.78rem;color:var(--cream-2);margin-top:.35em;letter-spacing:.08em}
.route-card .arrow{font-family:var(--font-en);font-style:italic;font-size:.82rem;color:var(--gold-soft);text-align:center;line-height:1.55;padding:0 .4rem}
.route-card .arrow em{display:block;font-style:normal;font-size:.68rem;letter-spacing:.14em;color:var(--cream-3);margin-top:.25em}

.jump-nav{margin-bottom:clamp(2.4rem,5vh,3.2rem);padding:1.2rem 1.3rem;border:1px solid var(--line-2);background:rgba(5,7,12,.35)}
.jump-nav p{font-family:var(--font-jp);font-size:.82rem;color:var(--gold-soft);margin-bottom:.85em;letter-spacing:.06em}
[data-lang="en"] .jump-nav p{font-family:var(--font-en);font-style:italic;letter-spacing:.04em}
.jump-nav ol{padding-left:1.2rem;display:grid;gap:.45em}
.jump-nav a{font-family:var(--font-jp);font-size:.88rem;color:var(--cream-2);text-decoration:none;border-bottom:1px solid transparent;transition:color .3s,border-color .3s}
.jump-nav a:hover{color:var(--gold-soft);border-color:var(--gold-deep)}
[data-lang="en"] .jump-nav a{font-family:var(--font-en);font-size:.9rem}

.content-block{margin-bottom:clamp(2.6rem,6vh,3.6rem);padding-top:.5rem}
.content-block h2{
  font-family:var(--font-en);font-weight:300;font-size:clamp(1.35rem,3vw,1.75rem);
  letter-spacing:.04em;color:var(--cream);margin-bottom:1rem;padding-bottom:.65rem;
  border-bottom:1px solid var(--line);
}
[data-lang="ja"] .content-block h2{font-family:var(--font-jp);letter-spacing:.08em;font-weight:500}
.content-block p,.content-block li{font-family:var(--font-jp);font-weight:300;font-size:clamp(.88rem,1.6vw,.96rem);line-height:2.05;color:var(--cream-2)}
[data-lang="en"] .content-block p,[data-lang="en"] .content-block li{font-family:var(--font-en);line-height:1.85;letter-spacing:.02em}
.content-block ul{margin:.8rem 0 0 1.1rem;display:grid;gap:.55em}
.content-block .sub{margin-top:1rem;padding-left:1rem;border-left:1px solid var(--line)}
.content-block .sub h3{font-family:var(--font-jp);font-size:.95rem;color:var(--cream);margin-bottom:.55em;font-weight:500}
[data-lang="en"] .content-block .sub h3{font-family:var(--font-en);font-style:italic;font-weight:400}
.note{
  margin-top:1rem;padding:.95rem 1.1rem;border-left:2px solid var(--gold-deep);
  background:rgba(201,163,94,.08);font-size:.84rem;line-height:1.9;color:var(--cream-2);
}
.note strong{color:var(--gold-soft);font-weight:500}
.ext-link{
  display:inline-block;margin-top:1rem;font-family:var(--font-en);font-style:italic;
  font-size:.92rem;color:var(--gold-soft);text-decoration:none;border-bottom:1px solid var(--gold-deep);padding-bottom:2px;
}
.ext-link:hover{color:var(--cream)}

.faq-group{margin-bottom:clamp(2.4rem,5vh,3.2rem)}
.faq-group h2{
  font-family:var(--font-jp);font-size:clamp(.95rem,2vw,1.05rem);letter-spacing:.14em;
  color:var(--gold-soft);text-align:center;margin-bottom:1.2rem;font-weight:500;
}
[data-lang="en"] .faq-group h2{font-family:var(--font-en);font-style:italic;letter-spacing:.08em;font-weight:400}
.faq-item{border-top:1px solid var(--line-2)}
.faq-item:last-child{border-bottom:1px solid var(--line-2)}
.faq-q{
  width:100%;display:flex;align-items:flex-start;justify-content:space-between;gap:1rem;
  padding:1.15rem 0;background:none;border:none;color:var(--cream);cursor:pointer;text-align:left;
  font-family:var(--font-jp);font-size:clamp(.9rem,1.7vw,.98rem);line-height:1.75;font-weight:500;
}
[data-lang="en"] .faq-q{font-family:var(--font-en);font-weight:400;letter-spacing:.02em;line-height:1.55}
.faq-q .mark{flex-shrink:0;font-family:var(--font-en);font-style:italic;color:var(--gold-soft);transition:transform .35s var(--ease);margin-top:.1em}
.faq-item.open .faq-q .mark{transform:rotate(45deg)}
.faq-a{
  max-height:0;overflow:hidden;transition:max-height .45s var(--ease),opacity .35s ease,padding .35s ease;
  opacity:0;padding:0 0 0 1.1rem;border-left:1px solid var(--line);
}
.faq-item.open .faq-a{max-height:800px;opacity:1;padding:0 0 1.15rem 1.1rem;margin-bottom:.35rem}
.faq-a p{font-family:var(--font-jp);font-weight:300;font-size:clamp(.86rem,1.55vw,.94rem);line-height:2;color:var(--cream-2)}
[data-lang="en"] .faq-a p{font-family:var(--font-en);line-height:1.82;letter-spacing:.02em}

.page-cta{
  margin-top:3rem;padding:2rem 1.4rem;text-align:center;
  border:1px solid var(--line);background:rgba(5,7,12,.42);
}
.page-cta p{font-family:var(--font-jp);font-size:.92rem;color:var(--cream-2);margin-bottom:1rem;line-height:1.95}
[data-lang="en"] .page-cta p{font-family:var(--font-en);font-style:italic}
.page-cta .btn-top{display:inline-block}

footer{padding:clamp(3rem,8vh,5rem) clamp(1.4rem,5vw,4.5rem) 2.5rem;border-top:1px solid var(--line-2);background:rgba(5,7,12,.72);display:grid;gap:1.6rem}
@media(min-width:760px){footer{grid-template-columns:1fr auto;align-items:end}}
.f-brand{font-family:var(--font-en);letter-spacing:.32em;text-transform:uppercase;font-size:1rem}
.f-brand small{display:block;font-family:var(--font-jp);font-size:.56em;letter-spacing:.4em;color:var(--gold-soft);margin-top:.55em}
.f-info{font-family:var(--font-jp);font-size:.82rem;line-height:2.05;color:var(--cream-2)}
.f-info a{color:var(--gold-soft);text-decoration:none}
.f-copy{grid-column:1/-1;font-family:var(--font-en);font-size:.64rem;letter-spacing:.22em;text-transform:uppercase;color:var(--cream-3);text-align:center;border-top:1px solid var(--line-2);padding-top:1.6rem}

.reveal{opacity:0;transform:translateY(22px);transition:opacity .9s var(--ease),transform .9s var(--ease)}
.reveal.in{opacity:1;transform:none}

@media(max-width:640px){
  .btn-top{display:none}
  header{padding:1rem 1.15rem}
  .brand{font-size:.8rem;letter-spacing:.26em}
  .nav-links{gap:.65rem}
  .nav-links a{font-size:.72rem}
  .route-card{grid-template-columns:1fr;gap:.6rem;text-align:center}
  .route-card .arrow{padding:.35rem 0}
}