/* ============================================================
   合同会社リードアーチ — Shared Design System
   ============================================================ */
:root{
  --navy:#0e2340;
  --navy-2:#16345c;
  --navy-3:#1f4675;
  --ink:#1a2632;
  --muted:#5c6b7a;
  --line:#e3e8ee;
  --bg:#ffffff;
  --bg-soft:#f5f7fa;
  --bg-soft-2:#eef2f7;
  --gold:#c2a15a;
  --gold-soft:#d8c390;
  --white:#ffffff;
  --shadow:0 18px 50px -20px rgba(14,35,64,.28);
  --shadow-sm:0 8px 24px -14px rgba(14,35,64,.30);
  --radius:14px;
  --maxw:1200px;
}
*{margin:0;padding:0;box-sizing:border-box}
html{scroll-behavior:smooth}
body{
  font-family:"Noto Sans JP",system-ui,sans-serif;
  color:var(--ink);background:var(--bg);line-height:1.9;font-weight:400;
  -webkit-font-smoothing:antialiased;font-feature-settings:"palt";overflow-x:hidden;
}
a{color:inherit;text-decoration:none}
img{max-width:100%;display:block}
.wrap{max-width:var(--maxw);margin:0 auto;padding:0 28px}
.serif{font-family:"Noto Serif JP",serif}
.en{font-family:"Cormorant Garamond",serif;letter-spacing:.06em}

/* ---- section labels ---- */
.eyebrow{display:inline-flex;align-items:center;gap:10px;font-size:.78rem;letter-spacing:.22em;font-weight:700;color:var(--gold);text-transform:uppercase;margin-bottom:18px}
.eyebrow::before{content:"";width:34px;height:1px;background:var(--gold)}
.eyebrow.c{justify-content:center}
.eyebrow.c::before{display:none}
.sec-title{font-size:clamp(1.7rem,3.4vw,2.5rem);font-weight:700;line-height:1.42;color:var(--navy);letter-spacing:.02em;margin-bottom:22px}
.sec-title .accent{color:var(--gold)}
.lead{color:var(--muted);font-size:1.02rem;max-width:640px}
.head-center{text-align:center;max-width:740px;margin:0 auto 64px}
.head-center .lead{margin:0 auto}

/* ---- buttons ---- */
.btn{display:inline-flex;align-items:center;gap:10px;padding:16px 34px;border-radius:44px;font-weight:700;font-size:.98rem;transition:transform .25s,box-shadow .25s,background .25s,color .25s;letter-spacing:.02em;cursor:pointer}
.btn-primary{background:var(--gold);color:var(--navy);box-shadow:0 16px 34px -14px rgba(194,161,90,.7)}
.btn-primary:hover{transform:translateY(-3px);box-shadow:0 22px 40px -14px rgba(194,161,90,.8)}
.btn-ghost{border:1px solid rgba(255,255,255,.4);color:var(--white)}
.btn-ghost:hover{background:rgba(255,255,255,.1);transform:translateY(-3px)}
.btn-dark{background:var(--navy);color:#fff}
.btn-dark:hover{background:var(--navy-2);transform:translateY(-3px)}
.btn-outline{border:1.5px solid var(--navy);color:var(--navy)}
.btn-outline:hover{background:var(--navy);color:#fff;transform:translateY(-3px)}
.btn svg{width:18px;height:18px}

/* ---- header ---- */
header{position:fixed;top:0;left:0;right:0;z-index:100;background:transparent;transition:background .4s,box-shadow .4s,padding .4s;padding:22px 0}
header.solid,header.scrolled{background:rgba(255,255,255,.94);backdrop-filter:blur(12px);box-shadow:0 1px 0 var(--line);padding:14px 0}
.nav{display:flex;align-items:center;justify-content:space-between}
.brand{display:flex;align-items:center;gap:13px;color:var(--white);transition:color .4s}
header.solid .brand,header.scrolled .brand{color:var(--navy)}
.brand .logo-mark{width:44px;height:44px;flex:none}
.brand .logo-mark svg{width:100%;height:100%;display:block}
.brand-text{display:flex;flex-direction:column;line-height:1.25}
.brand-text .bn{font-weight:700;font-size:1.06rem;letter-spacing:.04em}
.brand-text .bs{font-size:.62rem;letter-spacing:.28em;opacity:.7;font-weight:500}
/* real logo image in header */
.brand .logo-img{height:46px;width:auto;display:block;transition:height .4s}
header.solid .brand .logo-img,header.scrolled .brand .logo-img{height:40px}
.brand .logo-light{display:none}
header:not(.solid):not(.scrolled) .brand .logo-dark{display:none}
header:not(.solid):not(.scrolled) .brand .logo-light{display:block}
@media(max-width:640px){.brand .logo-img{height:38px}header.solid .brand .logo-img,header.scrolled .brand .logo-img{height:34px}}
.menu{display:flex;align-items:center;gap:32px}
.menu a{color:rgba(255,255,255,.9);font-size:.9rem;font-weight:500;letter-spacing:.03em;transition:color .3s;position:relative}
header.solid .menu a,header.scrolled .menu a{color:var(--ink)}
.menu a:hover{color:var(--gold)}
.menu a.active{color:var(--gold)}
.menu a:not(.nav-cta)::after{content:"";position:absolute;left:0;bottom:-6px;width:0;height:1.5px;background:var(--gold);transition:width .3s}
.menu a:not(.nav-cta):hover::after,.menu a.active:not(.nav-cta)::after{width:100%}
.nav-cta{background:var(--gold);color:var(--navy)!important;padding:11px 24px;border-radius:40px;font-weight:700;font-size:.86rem;transition:transform .25s,box-shadow .25s}
.nav-cta:hover{transform:translateY(-2px);box-shadow:0 12px 22px -10px rgba(194,161,90,.7)}
.burger{display:none;flex-direction:column;gap:5px;cursor:pointer;padding:6px}
.burger span{width:26px;height:2px;background:var(--white);transition:.3s}
header.solid .burger span,header.scrolled .burger span{background:var(--navy)}

/* ---- page hero (sub pages) ---- */
.page-hero{position:relative;padding:180px 0 90px;background:linear-gradient(135deg,#0b1c33 0%,#0e2340 50%,#16345c 100%);color:#fff;overflow:hidden}
.page-hero .grid-bg{position:absolute;inset:0;opacity:.5;background-image:linear-gradient(rgba(255,255,255,.04) 1px,transparent 1px),linear-gradient(90deg,rgba(255,255,255,.04) 1px,transparent 1px);background-size:60px 60px;mask-image:radial-gradient(circle at 75% 30%,black,transparent 75%)}
.page-hero .arch{position:absolute;right:-4%;top:50%;transform:translateY(-50%);width:min(46vw,540px);opacity:.85;pointer-events:none}
.page-hero-inner{position:relative;z-index:2;max-width:720px}
.breadcrumb{display:flex;gap:10px;align-items:center;font-size:.8rem;color:rgba(255,255,255,.6);margin-bottom:22px;letter-spacing:.04em}
.breadcrumb a:hover{color:var(--gold-soft)}
.breadcrumb span{opacity:.5}
.page-hero .en-label{font-family:"Cormorant Garamond",serif;font-size:1.1rem;letter-spacing:.24em;color:var(--gold-soft);margin-bottom:12px;text-transform:uppercase}
.page-hero h1{font-size:clamp(2rem,4.6vw,3.2rem);font-weight:700;line-height:1.4;letter-spacing:.02em;margin-bottom:20px}
.page-hero p{color:rgba(255,255,255,.82);font-size:1.05rem;font-weight:300;max-width:600px}

/* ---- generic ---- */
section.block{padding:110px 0}
.bg-soft{background:var(--bg-soft)}
.bg-navy{background:var(--navy);color:#fff}

/* ---- footer ---- */
footer{background:var(--navy);color:rgba(255,255,255,.72);padding:66px 0 30px}
.foot-top{display:grid;grid-template-columns:1.5fr 1fr 1fr 1.2fr;gap:40px;padding-bottom:42px;border-bottom:1px solid rgba(255,255,255,.12)}
.foot-brand .brand{color:#fff;margin-bottom:20px}
.foot-brand .brand .logo-img{height:52px}
.foot-brand p{font-size:.88rem;color:rgba(255,255,255,.6);max-width:320px}
.foot-col h5{color:#fff;font-size:.8rem;letter-spacing:.1em;margin-bottom:18px;font-weight:700}
.foot-col a{display:block;font-size:.9rem;margin-bottom:12px;color:rgba(255,255,255,.66);transition:.3s}
.foot-col a:hover{color:var(--gold-soft);padding-left:4px}
.foot-contact p{font-size:.86rem;color:rgba(255,255,255,.66);margin-bottom:10px;display:flex;gap:10px;align-items:flex-start}
.foot-contact p svg{width:16px;height:16px;flex:none;margin-top:4px;color:var(--gold-soft)}
.foot-bottom{display:flex;justify-content:space-between;align-items:center;padding-top:24px;flex-wrap:wrap;gap:12px}
.foot-bottom .cp{font-size:.8rem;color:rgba(255,255,255,.5)}
.foot-bottom .en{font-size:.8rem;letter-spacing:.14em;color:rgba(255,255,255,.4)}

/* ---- reveal ---- */
.reveal{opacity:0;transform:translateY(30px);transition:opacity .8s cubic-bezier(.2,.7,.3,1),transform .8s cubic-bezier(.2,.7,.3,1)}
.reveal.in{opacity:1;transform:none}
.reveal.d1{transition-delay:.08s}.reveal.d2{transition-delay:.16s}.reveal.d3{transition-delay:.24s}.reveal.d4{transition-delay:.32s}

/* ---- CTA band (shared) ---- */
.cta{background:linear-gradient(135deg,#0e2340,#1f4675);color:#fff;text-align:center;padding:100px 0;position:relative;overflow:hidden}
.cta .arch2{position:absolute;left:50%;top:50%;transform:translate(-50%,-50%);width:640px;opacity:.12;pointer-events:none}
.cta-inner{position:relative;z-index:2;max-width:720px;margin:0 auto}
.cta h2{font-size:clamp(1.8rem,3.6vw,2.6rem);font-weight:700;line-height:1.5;margin-bottom:22px}
.cta h2 .hl{color:var(--gold-soft)}
.cta p{color:rgba(255,255,255,.82);margin-bottom:40px;font-size:1.05rem;font-weight:300}
.cta-actions{display:flex;gap:16px;justify-content:center;flex-wrap:wrap}
/* CTA with photo background */
.cta.has-photo{background:#0b1c33}
.cta.has-photo .cta-photo{position:absolute;inset:0;z-index:0;background-size:cover;background-position:center 32%}
.cta.has-photo .cta-shade{position:absolute;inset:0;z-index:1;background:linear-gradient(180deg,rgba(10,23,43,.42) 0%,rgba(8,18,36,.55) 100%),radial-gradient(ellipse 70% 60% at 50% 45%,rgba(7,16,32,.45) 0%,rgba(7,16,32,0) 100%)}
.cta.has-photo .arch2{z-index:1;opacity:.1}
.cta.has-photo .cta-inner{z-index:2}
.cta.has-photo .cta-inner h2,.cta.has-photo .cta-inner p{text-shadow:0 2px 20px rgba(4,10,22,.8),0 1px 4px rgba(4,10,22,.6)}
/* page-hero with photo background */
.page-hero.has-bg .ph-photo{position:absolute;inset:0;z-index:0;background-size:cover;background-position:center}
.page-hero.has-bg::after{content:"";position:absolute;inset:0;z-index:1;background:linear-gradient(100deg,rgba(9,22,42,.9) 0%,rgba(12,30,56,.78) 55%,rgba(14,35,64,.62) 100%)}
.page-hero.has-bg .grid-bg{display:none}
.page-hero.has-bg .arch{z-index:1;opacity:.5}
.page-hero.has-bg .page-hero-inner{position:relative;z-index:2}

/* ---- photo band (shared) ---- */
.photo-band{position:relative;padding:130px 0;color:#fff;overflow:hidden;background:var(--navy)}
.photo-band .pb-img{position:absolute;inset:0;background-size:cover;background-position:center 30%}
.photo-band .pb-overlay{position:absolute;inset:0;background:linear-gradient(105deg,rgba(11,28,51,.94) 0%,rgba(14,35,64,.86) 40%,rgba(14,35,64,.5) 100%)}
.photo-band .wrap{position:relative;z-index:2;max-width:720px}
.photo-band .eyebrow{color:var(--gold-soft)}
.photo-band .eyebrow::before{background:var(--gold-soft)}
.photo-band h2{font-size:clamp(1.6rem,3.2vw,2.4rem);font-weight:700;line-height:1.55;margin-bottom:22px}
.photo-band h2 .hl{color:var(--gold-soft)}
.photo-band p{color:rgba(255,255,255,.85);font-size:1.05rem;font-weight:300;margin-bottom:16px}

/* ---- subtle arch texture ---- */
.arch-tex{position:relative}
.arch-tex::before{content:"";position:absolute;inset:0;background:url(img/arch-pattern.png) center top/1100px auto repeat;opacity:.5;pointer-events:none;mask-image:linear-gradient(180deg,transparent,black 30%,black 70%,transparent)}
.arch-tex>*{position:relative;z-index:1}

/* ---- responsive base ---- */
@media(max-width:960px){
  .menu{display:none}
  .burger{display:flex}
  .menu.open{display:flex;flex-direction:column;position:absolute;top:100%;left:0;right:0;background:rgba(255,255,255,.98);backdrop-filter:blur(12px);padding:26px 28px;gap:20px;box-shadow:var(--shadow-sm)}
  .menu.open a{color:var(--ink)}
  .menu.open .nav-cta{color:var(--navy)!important;text-align:center}
  .foot-top{grid-template-columns:1fr 1fr}
  .page-hero .arch{opacity:.3;right:-24%}
}
@media(max-width:640px){
  .wrap{padding:0 20px}
  section.block{padding:74px 0}
  .page-hero{padding:150px 0 70px}
  .foot-top{grid-template-columns:1fr}
  .cta-actions .btn{width:100%;justify-content:center}
  .photo-band{padding:74px 0}
  .cta{padding:74px 0}
  .photo-band h2{font-size:1.5rem}
}