/* ============================================
   株式会社山王総合研究所 - サイト共通スタイル Ver1.1
   ============================================ */
:root{
  --navy:#0a1220;
  --navy2:#101c30;
  --gold:#c8a35f;
  --gold-light:#e2c78f;
  --white:#f5f2ec;
  --gray:#8a93a3;
  --line:rgba(200,163,95,.25);
}
*{margin:0;padding:0;box-sizing:border-box}
html{scroll-behavior:smooth}
@media(prefers-reduced-motion:reduce){
  html{scroll-behavior:auto}
  *,*::before,*::after{animation-duration:.01ms!important;animation-iteration-count:1!important;transition-duration:.01ms!important}
}
/* アクセシビリティ: キーボードフォーカスを明示 */
:focus-visible{outline:2px solid var(--gold);outline-offset:3px}
.skip-link{
  position:absolute;left:-9999px;top:0;z-index:9998;
  background:var(--gold);color:var(--navy);padding:10px 20px;font-size:13px;letter-spacing:.1em;
}
.skip-link:focus{left:0}
body{
  font-family:'Zen Kaku Gothic New',sans-serif;
  background:var(--navy);
  color:var(--white);
  line-height:1.9;
  overflow-x:hidden;
  -webkit-font-smoothing:antialiased;
}
::selection{background:var(--gold);color:var(--navy)}
img{max-width:100%;display:block}
a{color:inherit;text-decoration:none}
.en{font-family:'Marcellus',serif;letter-spacing:.08em}
.serif{font-family:'Shippori Mincho',serif}

/* ---------- Loader ---------- */
#loader{
  position:fixed;inset:0;background:var(--navy);z-index:9999;
  display:flex;align-items:center;justify-content:center;flex-direction:column;gap:24px;
  transition:opacity .8s ease,visibility .8s;
}
#loader.done{opacity:0;visibility:hidden}
#loader .mark{
  font-family:'Marcellus',serif;font-size:clamp(28px,4vw,44px);color:var(--gold);
  letter-spacing:.3em;animation:pulse 1.6s ease-in-out infinite;
}
#loader .bar{width:160px;height:1px;background:rgba(255,255,255,.1);overflow:hidden}
#loader .bar i{display:block;height:100%;width:40%;background:var(--gold);animation:load 1.2s ease-in-out infinite}
@keyframes load{0%{transform:translateX(-100%)}100%{transform:translateX(400%)}}
@keyframes pulse{0%,100%{opacity:.6}50%{opacity:1}}

/* ---------- Header ---------- */
header{
  position:fixed;top:0;left:0;right:0;z-index:100;
  display:flex;align-items:center;justify-content:space-between;
  padding:22px clamp(20px,4vw,56px);
  transition:background .4s,padding .4s,box-shadow .4s;
}
header.scrolled{
  background:rgba(10,18,32,.92);backdrop-filter:blur(12px);
  padding:14px clamp(20px,4vw,56px);
  box-shadow:0 1px 0 var(--line);
}
.logo{display:flex;align-items:center;gap:14px}
.logo svg{height:38px;width:auto;display:block}
nav.pc{display:flex;gap:36px}
nav.pc a{
  font-family:'Marcellus',serif;font-size:13px;letter-spacing:.18em;
  position:relative;padding:4px 0;color:var(--white);opacity:.85;transition:opacity .3s;
}
nav.pc a::after{
  content:'';position:absolute;left:0;bottom:0;width:100%;height:1px;
  background:var(--gold);transform:scaleX(0);transform-origin:right;transition:transform .4s cubic-bezier(.22,1,.36,1);
}
nav.pc a:hover{opacity:1}
nav.pc a:hover::after{transform:scaleX(1);transform-origin:left}
nav.pc a.lang{color:var(--gold);opacity:1;display:inline-flex;align-items:center;gap:6px}
nav.pc a.lang::before{content:'';width:14px;height:1px;background:var(--line)}
nav.pc a.cta{
  border:1px solid var(--gold);padding:8px 22px;color:var(--gold);
  transition:background .3s,color .3s;
}
nav.pc a.cta:hover{background:var(--gold);color:var(--navy)}
nav.pc a.cta::after{display:none}

/* hamburger */
#burger{
  display:none;width:44px;height:44px;background:none;border:none;cursor:pointer;
  flex-direction:column;align-items:center;justify-content:center;gap:7px;z-index:210;
}
#burger i{display:block;width:26px;height:1px;background:var(--white);transition:.4s}
#burger.open i:nth-child(1){transform:translateY(4px) rotate(45deg)}
#burger.open i:nth-child(2){transform:translateY(-4px) rotate(-45deg)}
#mnav{
  position:fixed;inset:0;background:rgba(10,18,32,.97);backdrop-filter:blur(16px);z-index:200;
  display:flex;flex-direction:column;align-items:center;justify-content:center;gap:8px;
  opacity:0;visibility:hidden;transition:.5s;
}
#mnav.open{opacity:1;visibility:visible}
#mnav a{font-family:'Marcellus',serif;font-size:26px;letter-spacing:.2em;padding:12px;color:var(--white)}
#mnav a small{display:block;font-family:'Zen Kaku Gothic New';font-size:11px;color:var(--gold);text-align:center;letter-spacing:.3em}

/* ---------- Hero ---------- */
.hero{
  position:relative;min-height:100svh;display:flex;align-items:center;
  padding:0 clamp(20px,6vw,80px);
}
.hero-bg{
  position:absolute;inset:0;z-index:0;overflow:hidden;
}
.hero-bg::before{
  content:'';position:absolute;inset:0;
  background:url('../img/top01.jpg') center/cover no-repeat;
  animation:heroZoom 18s ease-out forwards;
}
.hero-bg::after{
  content:'';position:absolute;inset:0;
  background:linear-gradient(100deg,rgba(10,18,32,.96) 20%,rgba(10,18,32,.72) 55%,rgba(10,18,32,.45));
}
@keyframes heroZoom{from{transform:scale(1.12)}to{transform:scale(1)}}
.hero-inner{position:relative;z-index:2;max-width:1200px;width:100%;margin:0 auto}
.hero .kicker{
  display:inline-flex;align-items:center;gap:14px;color:var(--gold);
  font-size:12px;letter-spacing:.4em;margin-bottom:28px;
}
.hero .kicker::before{content:'';width:48px;height:1px;background:var(--gold)}
.hero h1{
  font-family:'Marcellus',serif;font-weight:400;
  font-size:clamp(44px,8.5vw,110px);line-height:1.08;letter-spacing:.02em;
}
.hero h1 .gold{color:var(--gold)}
.hero .lead{
  margin-top:32px;max-width:560px;font-size:clamp(14px,1.4vw,17px);
  color:#cfd6e0;font-weight:300;
}
.hero .lead strong{color:var(--white);font-weight:500}
.hero-actions{margin-top:44px;display:flex;gap:20px;flex-wrap:wrap}
.btn{
  display:inline-flex;align-items:center;gap:14px;
  font-family:'Marcellus',serif;font-size:14px;letter-spacing:.2em;
  padding:16px 36px;border:1px solid var(--gold);color:var(--gold);
  position:relative;overflow:hidden;transition:color .4s;
}
.btn::before{
  content:'';position:absolute;inset:0;background:var(--gold);
  transform:translateX(-101%);transition:transform .4s cubic-bezier(.22,1,.36,1);z-index:-1;
}
.btn:hover{color:var(--navy)}
.btn:hover::before{transform:translateX(0)}
.btn.ghost{border-color:rgba(245,242,236,.35);color:var(--white)}
.btn.ghost::before{background:var(--white)}
.btn .arrow{transition:transform .3s}
.btn:hover .arrow{transform:translateX(6px)}
.hero-scroll{
  position:absolute;bottom:0;left:clamp(20px,6vw,80px);z-index:2;
  display:flex;flex-direction:column;align-items:center;gap:12px;
  font-size:10px;letter-spacing:.3em;color:var(--gray);writing-mode:vertical-rl;
  padding-bottom:0;
}
.hero-scroll::after{
  content:'';width:1px;height:72px;background:linear-gradient(var(--gold),transparent);
  animation:scrollLine 2s ease-in-out infinite;
}
@keyframes scrollLine{0%{transform:scaleY(0);transform-origin:top}50%{transform:scaleY(1);transform-origin:top}51%{transform-origin:bottom}100%{transform:scaleY(0);transform-origin:bottom}}
.hero-num{
  position:absolute;right:clamp(16px,4vw,56px);bottom:40px;z-index:2;text-align:right;
  font-family:'Marcellus',serif;color:rgba(245,242,236,.25);font-size:13px;letter-spacing:.25em;
}
.hero-num b{color:var(--gold);font-weight:400}

/* ---------- Marquee ---------- */
.marquee{
  border-top:1px solid var(--line);border-bottom:1px solid var(--line);
  overflow:hidden;padding:20px 0;background:var(--navy2);
}
.marquee .track{display:flex;width:max-content;animation:marq 30s linear infinite}
.marquee span{
  font-family:'Marcellus',serif;font-size:clamp(18px,2.4vw,28px);letter-spacing:.15em;
  color:transparent;-webkit-text-stroke:1px rgba(200,163,95,.5);
  padding:0 40px;white-space:nowrap;
}
.marquee span.fill{color:var(--gold);-webkit-text-stroke:0}
@keyframes marq{to{transform:translateX(-50%)}}

/* ---------- Sections ---------- */
section{padding:clamp(90px,12vw,160px) clamp(20px,6vw,80px);position:relative}
.wrap{max-width:1200px;margin:0 auto}
.sec-head{margin-bottom:clamp(48px,6vw,80px)}
.sec-head .num{
  font-family:'Marcellus',serif;color:var(--gold);font-size:14px;letter-spacing:.3em;
  display:flex;align-items:center;gap:16px;margin-bottom:16px;
}
.sec-head .num::after{content:'';width:64px;height:1px;background:var(--line)}
.sec-head h2{
  font-family:'Marcellus',serif;font-weight:400;
  font-size:clamp(36px,6vw,72px);line-height:1.1;letter-spacing:.02em;
}
.sec-head .jp{color:var(--gray);font-size:13px;letter-spacing:.35em;margin-top:12px}
.bg-word{
  position:absolute;top:60px;right:-10px;z-index:0;pointer-events:none;
  font-family:'Marcellus',serif;font-size:clamp(80px,16vw,220px);line-height:1;
  color:transparent;-webkit-text-stroke:1px rgba(245,242,236,.05);white-space:nowrap;
}

/* reveal */
.rv{opacity:0;transform:translateY(40px);transition:opacity 1s cubic-bezier(.22,1,.36,1),transform 1s cubic-bezier(.22,1,.36,1)}
.rv.show{opacity:1;transform:none}
.rv-d1{transition-delay:.12s}.rv-d2{transition-delay:.24s}.rv-d3{transition-delay:.36s}

/* ---------- Mission ---------- */
#mission{background:var(--navy)}
#mission .grid{display:grid;grid-template-columns:1.1fr .9fr;gap:clamp(40px,6vw,90px);align-items:center}
#mission h3{
  font-family:'Shippori Mincho',serif;font-weight:500;
  font-size:clamp(24px,3.2vw,40px);line-height:1.7;letter-spacing:.06em;
}
#mission h3 em{font-style:normal;color:var(--gold)}
#mission p{color:#b9c1cd;font-weight:300;margin-top:28px;font-size:15px}
.stats{display:grid;grid-template-columns:repeat(3,1fr);gap:1px;background:var(--line);border:1px solid var(--line);margin-top:8px}
.stat{background:var(--navy2);padding:32px 16px;text-align:center}
.stat .v{font-family:'Marcellus',serif;font-size:clamp(30px,3.4vw,44px);color:var(--gold);line-height:1}
.stat .v small{font-size:.45em;letter-spacing:.1em}
.stat .l{font-size:11px;letter-spacing:.2em;color:var(--gray);margin-top:12px}

/* ---------- Business ---------- */
#business{background:var(--navy2)}
.biz-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:1px;background:var(--line);border:1px solid var(--line)}
.biz{
  background:var(--navy2);padding:clamp(32px,3.4vw,56px) clamp(24px,2.6vw,44px);
  position:relative;overflow:hidden;transition:background .5s;
}
.biz::before{
  content:'';position:absolute;top:0;left:0;width:100%;height:2px;
  background:var(--gold);transform:scaleX(0);transform-origin:left;transition:transform .6s cubic-bezier(.22,1,.36,1);
}
.biz:hover{background:#15233c}
.biz:hover::before{transform:scaleX(1)}
.biz .no{font-family:'Marcellus',serif;color:rgba(200,163,95,.4);font-size:15px;letter-spacing:.2em}
.biz .icon{
  width:64px;height:64px;margin:28px 0 24px;
  display:flex;align-items:center;justify-content:center;
  border:1px solid var(--line);border-radius:50%;
  transition:border-color .4s,transform .4s;
}
.biz:hover .icon{border-color:var(--gold);transform:translateY(-4px)}
.biz h3{font-size:19px;font-weight:500;letter-spacing:.08em;margin-bottom:6px}
.biz .sub{font-family:'Marcellus',serif;font-size:11px;letter-spacing:.2em;color:var(--gold);margin-bottom:18px}
.biz p{font-size:13.5px;color:#a9b2bf;font-weight:300}
.biz-lead{max-width:760px;color:#b9c1cd;font-weight:300;margin-bottom:clamp(40px,5vw,64px);font-size:15px}
.biz-lead strong{color:var(--white);font-weight:500}

/* ---------- Works ---------- */
#works .case{
  display:grid;grid-template-columns:1fr 1fr;gap:0;
  border:1px solid var(--line);background:var(--navy2);
}
#works .visual{position:relative;min-height:380px;overflow:hidden}
#works .visual img{position:absolute;inset:0;width:100%;height:100%;object-fit:cover;transition:transform 1.2s cubic-bezier(.22,1,.36,1)}
#works .case:hover .visual img{transform:scale(1.06)}
#works .case + .case{margin-top:clamp(40px,5vw,72px)}
#works .case2 .visual{order:2}
#works .case2 .body{order:1}
#works .visual .tag{
  position:absolute;top:24px;left:24px;z-index:2;
  background:var(--gold);color:var(--navy);font-family:'Marcellus',serif;
  font-size:12px;letter-spacing:.2em;padding:8px 18px;
}
#works .body{padding:clamp(32px,4vw,64px)}
#works .body h3{font-family:'Shippori Mincho',serif;font-size:clamp(19px,2vw,25px);font-weight:600;line-height:1.6;letter-spacing:.04em}
#works .body .row{margin-top:32px}
#works .body .row + .row{margin-top:28px;padding-top:28px;border-top:1px dashed rgba(200,163,95,.2)}
#works .body h4{
  display:flex;align-items:center;gap:12px;
  font-family:'Marcellus',serif;font-weight:400;font-size:12px;letter-spacing:.25em;color:var(--gold);margin-bottom:12px;
}
#works .body h4::before{content:'';width:20px;height:1px;background:var(--gold)}
#works .body p{font-size:14px;color:#b9c1cd;font-weight:300}
#works .result{
  margin-top:32px;display:inline-flex;align-items:baseline;gap:14px;
  border:1px solid var(--line);padding:14px 24px;
}
#works .result b{font-family:'Marcellus',serif;color:var(--gold);font-size:22px;font-weight:400;letter-spacing:.05em}
#works .result span{font-size:12px;color:var(--gray);letter-spacing:.15em}

/* ---------- Company ---------- */
#company{background:var(--navy2)}
#company .grid{display:grid;grid-template-columns:1fr 1.2fr;gap:clamp(40px,6vw,90px)}
.profile{width:100%;border-collapse:collapse}
.profile th,.profile td{
  padding:22px 8px;border-bottom:1px solid rgba(245,242,236,.08);
  font-size:14px;text-align:left;vertical-align:top;font-weight:300;
}
.profile th{
  width:110px;color:var(--gold);font-family:'Marcellus',serif;font-weight:400;
  font-size:12px;letter-spacing:.2em;padding-top:26px;
}
.profile td{color:#d4dae3}
.profile td small{display:block;color:var(--gray);font-size:12px}
.map{
  border:1px solid var(--line);height:100%;min-height:360px;position:relative;overflow:hidden;
}
.map iframe{width:100%;height:100%;border:0;filter:grayscale(1) invert(.92) contrast(.9)}
.addr{
  margin-top:20px;font-size:13px;color:var(--gray);letter-spacing:.05em;
  display:flex;align-items:center;gap:10px;
}
.addr::before{content:'';width:8px;height:8px;border:1px solid var(--gold);transform:rotate(45deg);flex-shrink:0}

/* ---------- News ---------- */
#news .item{
  display:flex;gap:clamp(20px,4vw,56px);align-items:baseline;
  padding:28px 8px;border-bottom:1px solid rgba(245,242,236,.08);
  transition:background .3s,padding-left .3s;flex-wrap:wrap;
}
#news .item:first-of-type{border-top:1px solid rgba(245,242,236,.08)}
#news .item:hover{background:rgba(200,163,95,.04);padding-left:20px}
#news .date{font-family:'Marcellus',serif;color:var(--gold);font-size:13px;letter-spacing:.15em;white-space:nowrap}
#news .cat{
  font-size:10px;letter-spacing:.2em;color:var(--gray);
  border:1px solid rgba(245,242,236,.2);padding:3px 12px;white-space:nowrap;
}
#news .ttl{font-size:14.5px;font-weight:300;color:#d4dae3}

/* ---------- Contact ---------- */
#contact{
  background:
    radial-gradient(ellipse 70% 90% at 50% 120%,rgba(200,163,95,.14),transparent 60%),
    var(--navy);
  text-align:center;
}
#contact h2{
  font-family:'Marcellus',serif;font-weight:400;
  font-size:clamp(40px,8vw,96px);letter-spacing:.04em;line-height:1.1;
}
#contact .jp{color:var(--gold);font-size:12px;letter-spacing:.4em;margin-top:16px}
#contact p{max-width:520px;margin:32px auto 0;color:#b9c1cd;font-weight:300;font-size:15px}
#contact .btn{margin-top:48px;padding:20px 64px;font-size:15px}

/* contact form */
.cform{max-width:640px;margin:56px auto 0;text-align:left}
.cform .field{margin-bottom:26px}
.cform label{
  display:flex;align-items:center;gap:10px;
  font-size:12px;letter-spacing:.2em;color:var(--gold);margin-bottom:10px;
  font-family:'Marcellus',serif;
}
.cform label .req{
  font-family:'Zen Kaku Gothic New';font-size:10px;color:var(--navy);
  background:var(--gold);padding:1px 8px;letter-spacing:.1em;
}
.cform input[type=text],.cform input[type=email],.cform textarea{
  width:100%;background:rgba(245,242,236,.04);border:1px solid rgba(200,163,95,.3);
  color:var(--white);padding:14px 18px;font-size:15px;font-family:inherit;
  transition:border-color .3s,background .3s;border-radius:0;
}
.cform input:focus,.cform textarea:focus{
  outline:none;border-color:var(--gold);background:rgba(245,242,236,.07);
}
.cform textarea{min-height:160px;resize:vertical}
.cform .quiz{display:flex;align-items:center;gap:16px;flex-wrap:wrap}
.cform .quiz .q{
  font-family:'Marcellus',serif;font-size:18px;color:var(--white);letter-spacing:.1em;
  border:1px dashed rgba(200,163,95,.4);padding:10px 20px;
}
.cform .quiz input{width:110px}
/* honeypot: hidden from humans, visible to bots */
.hp-field{position:absolute;left:-9999px;top:auto;width:1px;height:1px;overflow:hidden}
.cform button.btn{width:100%;justify-content:center;cursor:pointer;background:none;margin-top:8px}
.cform button.btn:disabled{opacity:.4;cursor:not-allowed}
#form-msg{margin-top:24px;font-size:14px;letter-spacing:.05em;display:none;padding:16px;border:1px solid var(--line)}
#form-msg.ok{display:block;color:var(--gold-light);border-color:var(--gold)}
#form-msg.ng{display:block;color:#e08a8a;border-color:rgba(224,138,138,.4)}
.cform .note{font-size:11px;color:var(--gray);margin-top:16px;text-align:center;letter-spacing:.05em}

/* ---------- Footer ---------- */
footer{
  border-top:1px solid var(--line);padding:56px clamp(20px,6vw,80px) 40px;
  background:var(--navy);
}
.foot{max-width:1200px;margin:0 auto;display:flex;justify-content:space-between;align-items:flex-end;gap:32px;flex-wrap:wrap}
.foot .logo img{height:30px}
.foot address{font-style:normal;font-size:12px;color:var(--gray);margin-top:16px;letter-spacing:.05em}
.foot nav{display:flex;gap:24px;flex-wrap:wrap}
.foot nav a{font-family:'Marcellus',serif;font-size:11px;letter-spacing:.2em;color:var(--gray);transition:color .3s}
.foot nav a:hover{color:var(--gold)}
.copy{max-width:1200px;margin:40px auto 0;padding-top:24px;border-top:1px solid rgba(245,242,236,.06);
  font-size:11px;color:#8b93a4;letter-spacing:.1em;display:flex;justify-content:space-between;flex-wrap:wrap;gap:8px}

/* to top */
#totop{
  position:fixed;right:24px;bottom:24px;z-index:90;width:52px;height:52px;
  border:1px solid var(--gold);background:rgba(10,18,32,.8);backdrop-filter:blur(8px);
  color:var(--gold);cursor:pointer;font-size:18px;
  opacity:0;visibility:hidden;transition:.4s;
}
#totop.show{opacity:1;visibility:visible}
#totop:hover{background:var(--gold);color:var(--navy)}

/* ---------- Responsive ---------- */
@media(min-width:900px){.logo span{display:block}}
@media(max-width:900px){
  nav.pc{display:none}
  #burger{display:flex}
  #mission .grid,#company .grid{grid-template-columns:1fr}
  .biz-grid{grid-template-columns:1fr}
  #works .case{grid-template-columns:1fr}
  #works .visual{min-height:260px}
  #works .case2 .visual{order:1}
  #works .case2 .body{order:2}
  .hero-scroll{display:none}
  .stats{grid-template-columns:repeat(3,1fr)}
}