@charset "UTF-8";
/* =========================================================
   R株式会社 — 共通スタイル
   重厚・格式：濃紺 × ゴールド、明朝体主体
   ========================================================= */

:root{
  --navy:#0f1b2d;
  --navy-2:#16263d;
  --navy-3:#1d3350;
  --gold:#c9a86a;
  --gold-d:#b3915288;
  --ink:#1c2431;
  --ink-soft:#3a4552;
  --paper:#f7f5f1;
  --paper-2:#efece5;
  --white:#ffffff;
  --line:rgba(15,27,45,.12);
  --line-l:rgba(255,255,255,.14);
  --serif:"Shippori Mincho","Noto Serif JP",'Hiragino Mincho ProN','游明朝','Yu Mincho',serif;
  --sans:"Noto Sans JP",'Hiragino Kaku Gothic ProN','游ゴシック','Yu Gothic',sans-serif;
  --wrap:1120px;
  --pad:clamp(20px,5vw,64px);
}

*{box-sizing:border-box;}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%;}
body{
  margin:0;
  font-family:var(--serif);
  color:var(--ink);
  background:var(--paper);
  line-height:1.9;
  font-size:16px;
  letter-spacing:.04em;
  font-feature-settings:"palt";
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block;}
a{color:var(--navy);text-decoration:none;transition:color .25s;}
a:hover{color:var(--gold);}

.wrap{max-width:var(--wrap);margin:0 auto;padding-inline:var(--pad);}
.en{font-family:var(--sans);letter-spacing:.28em;text-transform:uppercase;font-weight:500;}

/* ---------- Header ---------- */
.site-header{
  position:sticky;top:0;z-index:100;
  background:rgba(15,27,45,.94);
  backdrop-filter:saturate(140%) blur(8px);
  border-bottom:1px solid var(--line-l);
}
.header-inner{
  max-width:var(--wrap);margin:0 auto;padding:0 var(--pad);
  display:flex;align-items:center;justify-content:space-between;
  height:78px;
}
.brand{display:flex;align-items:baseline;gap:12px;color:#fff;}
.brand .mark{
  font-size:26px;font-weight:600;letter-spacing:.08em;color:#fff;
}
.brand .mark b{color:var(--gold);font-weight:600;}
.brand .sub{
  font-family:var(--sans);font-size:10px;letter-spacing:.24em;
  color:rgba(255,255,255,.55);text-transform:uppercase;
}
.nav{display:flex;align-items:center;gap:38px;}
.nav a{
  color:rgba(255,255,255,.82);font-family:var(--sans);
  font-size:14px;letter-spacing:.14em;position:relative;padding:6px 0;
}
.nav a .n-en{display:block;font-size:9px;letter-spacing:.22em;color:var(--gold);margin-bottom:2px;}
.nav a:hover,.nav a[aria-current="page"]{color:#fff;}
.nav a[aria-current="page"]::after,.nav a:hover::after{
  content:"";position:absolute;left:0;right:0;bottom:-2px;height:1px;background:var(--gold);
}
.nav .contact-btn{
  border:1px solid var(--gold);border-radius:0;
  padding:11px 22px;color:var(--gold);
}
.nav .contact-btn:hover{background:var(--gold);color:var(--navy);}
.nav .contact-btn::after{display:none;}
.nav .contact-btn .n-en{color:inherit;}

.nav-toggle{display:none;}
.hamburger{display:none;}

/* ---------- Hero ---------- */
.hero{
  position:relative;background:var(--navy);color:#fff;overflow:hidden;
  padding:clamp(90px,16vh,190px) 0 clamp(80px,13vh,150px);
}
.hero::before{
  content:"";position:absolute;inset:0;
  background:
    radial-gradient(120% 90% at 85% 0%,rgba(201,168,106,.10),transparent 55%),
    linear-gradient(180deg,var(--navy),var(--navy-2));
}
.hero .wrap{position:relative;}
.hero .kicker{
  font-family:var(--sans);font-size:12px;letter-spacing:.34em;
  color:var(--gold);margin:0 0 30px;
}
.hero h1{
  font-size:clamp(30px,5.4vw,60px);font-weight:600;line-height:1.55;
  margin:0;letter-spacing:.06em;
}
.hero h1 .thin{color:rgba(255,255,255,.75);}
.hero .lead{
  margin:34px 0 0;max-width:44em;color:rgba(255,255,255,.78);
  font-size:clamp(15px,1.7vw,18px);
}
.hero-rule{width:64px;height:2px;background:var(--gold);margin:0 0 40px;}

/* ---------- Page header (下層ページ) ---------- */
.page-hero{
  background:var(--navy);color:#fff;padding:clamp(70px,11vh,120px) 0 clamp(56px,8vh,90px);
  position:relative;overflow:hidden;
}
.page-hero::before{
  content:"";position:absolute;inset:0;
  background:radial-gradient(110% 120% at 90% -10%,rgba(201,168,106,.10),transparent 55%);
}
.page-hero .wrap{position:relative;}
.page-hero .en{color:var(--gold);font-size:12px;letter-spacing:.32em;display:block;margin-bottom:18px;}
.page-hero h1{font-size:clamp(28px,4.4vw,46px);font-weight:600;margin:0;letter-spacing:.08em;}
.page-hero p{margin:22px 0 0;color:rgba(255,255,255,.75);max-width:40em;}
.crumbs{font-family:var(--sans);font-size:12px;letter-spacing:.1em;color:rgba(255,255,255,.55);margin-bottom:26px;}
.crumbs a{color:rgba(255,255,255,.7);}
.crumbs a:hover{color:var(--gold);}

/* ---------- Sections ---------- */
section{padding:clamp(64px,10vw,120px) 0;}
.sec-head{margin-bottom:clamp(38px,5vw,60px);}
.sec-head .en{color:var(--gold);font-size:12px;letter-spacing:.3em;display:block;margin-bottom:14px;}
.sec-head h2{
  font-size:clamp(24px,3.4vw,36px);font-weight:600;margin:0;letter-spacing:.07em;line-height:1.5;
}
.sec-head .desc{margin:20px 0 0;color:var(--ink-soft);max-width:42em;}
.alt{background:var(--paper-2);}
.dark{background:var(--navy);color:#fff;}
.dark .sec-head h2{color:#fff;}
.dark .sec-head .desc{color:rgba(255,255,255,.72);}

/* ---------- Placeholder image ---------- */
.ph{
  position:relative;background:
    repeating-linear-gradient(135deg,var(--paper-2),var(--paper-2) 11px,#e6e2d8 11px,#e6e2d8 22px);
  border:1px solid var(--line);
  display:flex;align-items:center;justify-content:center;
  color:#8a8578;font-family:var(--sans);font-size:11px;letter-spacing:.18em;
  text-transform:uppercase;min-height:220px;
}
.ph.dark-ph{
  background:repeating-linear-gradient(135deg,var(--navy-2),var(--navy-2) 11px,var(--navy-3) 11px,var(--navy-3) 22px);
  border-color:var(--line-l);color:rgba(255,255,255,.5);
}
.ph span{background:rgba(247,245,241,.85);padding:6px 14px;border:1px solid var(--line);}
.ph.dark-ph span{background:rgba(15,27,45,.7);border-color:var(--line-l);}
.img-frame{border:1px solid var(--line);overflow:hidden;background:var(--paper-2);}
.img-frame img{width:100%;height:100%;object-fit:cover;display:block;}

/* ---------- Philosophy / lead block ---------- */
.lead-block{max-width:800px;}
.lead-block .big{
  font-size:clamp(20px,2.8vw,30px);line-height:2;font-weight:500;letter-spacing:.08em;margin:0 0 28px;
}
.lead-block p{color:var(--ink-soft);margin:0 0 20px;}

/* ---------- Service cards ---------- */
.svc-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:1px;background:var(--line);border:1px solid var(--line);}
.svc-grid .card{
  background:var(--paper);padding:clamp(30px,3.4vw,44px);display:flex;flex-direction:column;
  transition:background .3s;
}
.svc-grid .card:hover{background:var(--white);}
.svc-grid .no{font-family:var(--sans);font-size:12px;letter-spacing:.2em;color:var(--gold);margin-bottom:22px;}
.svc-grid .card h3{font-size:22px;font-weight:600;margin:0 0 6px;letter-spacing:.06em;}
.svc-grid .card .h-en{font-family:var(--sans);font-size:11px;letter-spacing:.2em;color:#9a9382;text-transform:uppercase;margin-bottom:20px;}
.svc-grid .card p{color:var(--ink-soft);font-size:15px;margin:0;flex:1;}
.svc-grid .card .more{margin-top:24px;font-family:var(--sans);font-size:12px;letter-spacing:.14em;color:var(--navy);}
.svc-grid .card .more::after{content:" →";color:var(--gold);}

/* ---------- Service detail (交互レイアウト) ---------- */
.svc-row{display:grid;grid-template-columns:1fr 1fr;gap:clamp(30px,5vw,70px);align-items:center;margin-bottom:clamp(56px,8vw,96px);}
.svc-row:last-child{margin-bottom:0;}
.svc-row:nth-child(even) .svc-txt{order:2;}
.svc-row .svc-txt .no{font-family:var(--sans);font-size:13px;letter-spacing:.24em;color:var(--gold);margin-bottom:18px;}
.svc-row .svc-txt h3{font-size:clamp(22px,2.8vw,30px);font-weight:600;margin:0 0 8px;letter-spacing:.06em;}
.svc-row .svc-txt .h-en{font-family:var(--sans);font-size:11px;letter-spacing:.2em;color:#9a9382;text-transform:uppercase;margin-bottom:24px;}
.svc-row .svc-txt p{color:var(--ink-soft);margin:0 0 18px;}
.svc-row .svc-img{align-self:stretch;}
.svc-row .svc-img .img-frame{aspect-ratio:3/2;min-height:0;height:100%;width:100%;}
.svc-row ul{margin:22px 0 0;padding:0;list-style:none;}
.svc-row ul li{position:relative;padding-left:20px;color:var(--ink-soft);font-size:15px;margin-bottom:10px;}
.svc-row ul li::before{content:"";position:absolute;left:0;top:14px;width:8px;height:1px;background:var(--gold);}

/* ---------- 事業内容（定款）リスト ---------- */
.purpose{max-width:820px;}
.purpose ol{counter-reset:p;list-style:none;margin:0;padding:0;}
.purpose ol li{
  counter-increment:p;position:relative;padding:26px 0 26px 64px;border-top:1px solid var(--line);
}
.purpose ol li:last-child{border-bottom:1px solid var(--line);}
.purpose ol li::before{
  content:counter(p,decimal-leading-zero);position:absolute;left:0;top:24px;
  font-family:var(--sans);font-size:14px;letter-spacing:.1em;color:var(--gold);
}

/* ---------- 会社概要テーブル ---------- */
.info-table{width:100%;border-collapse:collapse;}
.info-table th,.info-table td{text-align:left;padding:24px 4px;border-bottom:1px solid var(--line);vertical-align:top;}
.info-table th{
  width:200px;font-weight:500;color:var(--navy);font-size:15px;letter-spacing:.08em;
}
.info-table td{color:var(--ink-soft);}
.info-table td .en-l{display:block;font-family:var(--sans);font-size:10px;letter-spacing:.2em;color:#a9a292;margin-top:6px;text-transform:uppercase;}

/* ---------- Contact ---------- */
.contact-card{
  max-width:760px;margin:0 auto;text-align:center;background:var(--white);
  border:1px solid var(--line);padding:clamp(40px,6vw,72px);
}
.contact-card .en{color:var(--gold);font-size:12px;letter-spacing:.3em;margin-bottom:20px;}
.contact-card h2{font-size:clamp(22px,3vw,30px);font-weight:600;margin:0 0 16px;letter-spacing:.06em;}
.contact-card p{color:var(--ink-soft);margin:0 auto 34px;max-width:34em;}
.mail{
  display:inline-block;font-size:clamp(20px,3vw,30px);letter-spacing:.06em;
  color:var(--navy);border-bottom:2px solid var(--gold);padding-bottom:6px;font-family:var(--sans);
}
.mail:hover{color:var(--gold);}
.contact-note{margin-top:26px;font-family:var(--sans);font-size:13px;color:#9a9382;letter-spacing:.06em;}

/* ---------- CTA band ---------- */
.cta{background:var(--navy);color:#fff;text-align:center;}
.cta .en{color:var(--gold);font-size:12px;letter-spacing:.3em;display:block;margin-bottom:18px;}
.cta h2{font-size:clamp(22px,3.2vw,34px);font-weight:600;margin:0 0 30px;letter-spacing:.07em;}
.btn{
  display:inline-block;font-family:var(--sans);font-size:14px;letter-spacing:.16em;
  border:1px solid var(--gold);color:var(--gold);padding:15px 40px;
}
.btn:hover{background:var(--gold);color:var(--navy);}

/* ---------- Footer ---------- */
.site-footer{background:#0a1320;color:rgba(255,255,255,.7);padding:clamp(56px,7vw,80px) 0 30px;font-family:var(--sans);}
.footer-top{display:grid;grid-template-columns:1.4fr 1fr 1fr;gap:40px;padding-bottom:44px;border-bottom:1px solid var(--line-l);}
.footer-brand .mark{font-family:var(--serif);font-size:24px;color:#fff;letter-spacing:.08em;}
.footer-brand .mark b{color:var(--gold);}
.footer-brand address{font-style:normal;font-size:13px;line-height:2;color:rgba(255,255,255,.6);margin-top:18px;letter-spacing:.06em;}
.footer-brand address a{color:var(--gold);}
.footer-brand address a:hover{color:#fff;}
.footer-col h4{font-size:11px;letter-spacing:.2em;color:var(--gold);text-transform:uppercase;margin:0 0 20px;font-weight:500;}
.footer-col ul{list-style:none;margin:0;padding:0;}
.footer-col ul li{margin-bottom:13px;}
.footer-col a{color:rgba(255,255,255,.7);font-size:14px;letter-spacing:.06em;}
.footer-col a:hover{color:var(--gold);}
.footer-bottom{padding-top:26px;display:flex;justify-content:space-between;flex-wrap:wrap;gap:12px;font-size:12px;letter-spacing:.08em;color:rgba(255,255,255,.45);}

/* ---------- Responsive ---------- */
@media(max-width:860px){
  .header-inner{height:64px;}
  .hamburger{
    display:flex;flex-direction:column;justify-content:center;gap:6px;
    width:44px;height:44px;cursor:pointer;
  }
  .hamburger span{display:block;height:1.5px;background:#fff;transition:.3s;}
  .nav{
    position:fixed;inset:64px 0 auto 0;flex-direction:column;gap:0;align-items:stretch;
    background:var(--navy);border-top:1px solid var(--line-l);
    max-height:0;overflow:hidden;transition:max-height .4s ease;
  }
  .nav a{padding:20px var(--pad);border-bottom:1px solid var(--line-l);}
  .nav a::after{display:none;}
  .nav a .n-en{display:inline;margin-right:10px;}
  .nav .contact-btn{border:none;color:var(--gold);}
  .nav .contact-btn:hover{background:var(--navy-2);}
  .nav-toggle:checked ~ .nav{max-height:400px;}
  .nav-toggle:checked ~ .hamburger span:nth-child(1){transform:translateY(7.5px) rotate(45deg);}
  .nav-toggle:checked ~ .hamburger span:nth-child(2){opacity:0;}
  .nav-toggle:checked ~ .hamburger span:nth-child(3){transform:translateY(-7.5px) rotate(-45deg);}

  .svc-grid{grid-template-columns:1fr;}
  .svc-row{grid-template-columns:1fr;gap:26px;}
  .svc-row:nth-child(even) .svc-txt{order:0;}
  .svc-row .svc-img{order:-1;}
  .footer-top{grid-template-columns:1fr;gap:34px;}
  .info-table th{width:130px;font-size:14px;}
  .info-table th,.info-table td{padding:18px 2px;font-size:14px;}
}
@media(max-width:480px){
  .brand .sub{display:none;}
  .purpose ol li{padding-left:52px;}
}