/* B案：建築ブランド型・ダーク */
:root{
  --bg:#0e0e0e;--bg-2:#161615;--ink:#f2efe9;--mute:#9a968e;--line:#2a2927;--acc:#b08a5a;--acc-2:#d6b98a;
  --serif:"Shippori Mincho B1","Noto Serif JP",serif;--sans:"Zen Kaku Gothic New",system-ui,sans-serif;--en:"Inter",system-ui,sans-serif;
  --w:1240px;
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{margin:0;background:var(--bg);color:var(--ink);font-family:var(--sans);font-size:15px;line-height:2;-webkit-font-smoothing:antialiased;letter-spacing:.02em}
img{max-width:100%;display:block}
a{color:inherit}
.wrap{max-width:var(--w);margin:0 auto;padding:0 32px}
@media (max-width:700px){.wrap{padding:0 20px}}
h1,h2,h3{font-family:var(--serif);font-weight:500;margin:0;line-height:1.35}
.en{font-family:var(--en);letter-spacing:.32em;font-size:11px;color:var(--acc);text-transform:uppercase}
.sec{padding:140px 0}
@media (max-width:700px){.sec{padding:90px 0}}
.lab{display:flex;align-items:center;gap:16px;margin-bottom:28px}
.lab:before{content:"";width:40px;height:1px;background:var(--acc)}
.h2{font-size:44px;letter-spacing:.04em}
.h2 small{display:block;font-family:var(--sans);font-size:14px;color:var(--mute);letter-spacing:.1em;margin-top:12px;font-weight:400}
@media (max-width:700px){.h2{font-size:30px}}
.lead{color:var(--mute);max-width:640px}
.btn{display:inline-flex;align-items:center;gap:14px;text-decoration:none;font-family:var(--en);letter-spacing:.2em;font-size:12px;text-transform:uppercase;padding:14px 0;border-bottom:1px solid var(--acc);transition:.3s}
.btn:after{content:"→";transition:.3s}
.btn:hover{color:var(--acc-2)}
.btn:hover:after{transform:translateX(6px)}
.btn.box{border:1px solid var(--ink);padding:16px 34px}
.btn.box:hover{background:var(--ink);color:var(--bg)}

/* header */
.hd{position:fixed;top:0;left:0;right:0;z-index:50;transition:.4s;padding:22px 0}
.hd.scrolled{background:rgba(14,14,14,.85);backdrop-filter:blur(12px);padding:14px 0;border-bottom:1px solid var(--line)}
.hd .wrap{display:flex;align-items:center;justify-content:space-between}
.logo{text-decoration:none;display:flex;align-items:baseline;gap:12px}
.logo b{font-family:var(--en);font-weight:500;letter-spacing:.5em;font-size:20px}
.logo small{font-size:10px;color:var(--mute);letter-spacing:.2em}
.nav{display:flex;gap:36px}
.nav a{text-decoration:none;font-family:var(--en);font-size:11px;letter-spacing:.24em;text-transform:uppercase;color:var(--ink);opacity:.8}
.nav a:hover{opacity:1;color:var(--acc-2)}
.burger{display:none;background:none;border:0;width:44px;height:44px;cursor:pointer}
.burger span{display:block;width:26px;height:1px;background:var(--ink);margin:7px auto}
@media (max-width:860px){
  .nav{display:none}.burger{display:block}
  .nav.open{display:flex;position:fixed;inset:0;background:var(--bg);flex-direction:column;justify-content:center;align-items:center;gap:30px;z-index:-1;padding-top:60px}
  .nav.open a{font-size:14px}
}

/* hero */
.hero{position:relative;min-height:100vh;display:flex;align-items:flex-end;overflow:hidden}
.hero-bg{position:absolute;inset:0;background:url(https://images.unsplash.com/photo-1545324418-cc1a3fa10c00?w=2200&q=70) center/cover;filter:grayscale(.2) contrast(1.05);transform:scale(1.04);animation:kb 18s ease-out forwards}
@keyframes kb{to{transform:scale(1)}}
.hero:after{content:"";position:absolute;inset:0;background:linear-gradient(180deg,rgba(14,14,14,.35) 0%,rgba(14,14,14,.15) 40%,rgba(14,14,14,.92) 100%)}
.hero .wrap{position:relative;z-index:1;padding-bottom:90px;width:100%}
.hero .en{display:block;margin-bottom:26px}
.hero h1{font-size:clamp(44px,7vw,104px);letter-spacing:.06em;line-height:1.15}
.hero h1 .thin{font-weight:400;color:var(--acc-2)}
.hero p{max-width:560px;color:#d9d5cc;margin:30px 0 40px}
.hero-foot{display:flex;justify-content:space-between;align-items:flex-end;gap:30px;flex-wrap:wrap}
.scroll{font-family:var(--en);font-size:10px;letter-spacing:.3em;color:var(--mute);display:flex;align-items:center;gap:12px}
.scroll:after{content:"";width:1px;height:48px;background:var(--mute);animation:sc 2s infinite}
@keyframes sc{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}}
.vert{position:absolute;right:32px;top:50%;transform:translateY(-50%);writing-mode:vertical-rl;font-family:var(--en);font-size:10px;letter-spacing:.4em;color:var(--mute);z-index:1}
@media (max-width:700px){.vert{display:none}}

/* statement */
.state{border-top:1px solid var(--line);border-bottom:1px solid var(--line)}
.state .wrap{display:grid;grid-template-columns:1fr 1fr;gap:60px;padding-top:120px;padding-bottom:120px}
.state h2{font-size:34px;letter-spacing:.06em}
.state p{color:var(--mute)}
@media (max-width:860px){.state .wrap{grid-template-columns:1fr;gap:30px;padding-top:80px;padding-bottom:80px}.state h2{font-size:26px}}

/* numbered features */
.feat{display:grid;grid-template-columns:1fr 1fr;gap:80px;align-items:center;padding:70px 0}
.feat+.feat{border-top:1px solid var(--line)}
.feat.rev .f-img{order:2}
.f-img{overflow:hidden}
.f-img img{width:100%;aspect-ratio:5/4;object-fit:cover;filter:grayscale(.1);transition:1.2s}
.feat:hover .f-img img{transform:scale(1.03)}
.f-n{font-family:var(--en);font-size:64px;font-weight:200;color:var(--acc);line-height:1;margin-bottom:24px}
.feat h3{font-size:30px;letter-spacing:.04em;margin-bottom:20px}
.feat p{color:var(--mute)}
.feat ul{list-style:none;margin:22px 0 0;padding:0;border-top:1px solid var(--line)}
.feat li{padding:12px 0;border-bottom:1px solid var(--line);font-size:14px;display:flex;gap:16px}
.feat li:before{content:"—";color:var(--acc)}
@media (max-width:860px){.feat{grid-template-columns:1fr;gap:30px}.feat.rev .f-img{order:0}.feat h3{font-size:24px}}
.note{font-size:12px;color:var(--mute)}

/* works */
.works{display:grid;grid-template-columns:repeat(3,1fr);gap:40px 28px}
.work{transition:.3s}
.work-link{text-decoration:none;display:block}
.work-fig{margin:0;aspect-ratio:4/5;overflow:hidden;background:var(--bg-2);position:relative}
.work-fig img{width:100%;height:100%;object-fit:cover;filter:grayscale(.15);transition:1s}
.work-fig:after{content:"";position:absolute;inset:0;background:linear-gradient(180deg,transparent 60%,rgba(14,14,14,.6));opacity:0;transition:.5s}
.work:hover .work-fig img{transform:scale(1.05);filter:grayscale(0)}
.work:hover .work-fig:after{opacity:1}
.work-meta{display:flex;justify-content:space-between;font-family:var(--en);font-size:10px;letter-spacing:.24em;color:var(--acc);margin:18px 0 8px;text-transform:uppercase}
.work-title{font-size:19px;letter-spacing:.04em}
.work-loc{margin:6px 0 0;font-size:13px;color:var(--mute)}
.work-empty{grid-column:1/-1;color:var(--mute)}
@media (max-width:860px){.works{grid-template-columns:1fr 1fr;gap:28px 16px}}
@media (max-width:560px){.works{grid-template-columns:1fr}}

/* compare */
.cmp{width:100%;border-collapse:collapse;font-size:14px}
.cmp th,.cmp td{padding:22px 16px;border-bottom:1px solid var(--line);text-align:left;vertical-align:top}
.cmp thead th{font-family:var(--en);font-size:10px;letter-spacing:.3em;color:var(--mute);text-transform:uppercase;font-weight:400}
.cmp thead th.hl{color:var(--acc)}
.cmp tbody th{font-family:var(--serif);font-weight:500;font-size:17px;width:28%}
.cmp td{color:var(--mute)}
.cmp td.hl{color:var(--ink)}

/* flow */
.flow{display:grid;grid-template-columns:repeat(4,1fr);gap:0}
.flow div{padding:36px 28px 36px 0;border-top:1px solid var(--line);position:relative}
.flow .s{font-family:var(--en);font-size:11px;letter-spacing:.3em;color:var(--acc)}
.flow h4{font-family:var(--serif);font-weight:500;font-size:22px;margin:14px 0 8px}
.flow p{font-size:13px;color:var(--mute);margin:0}
@media (max-width:760px){.flow{grid-template-columns:1fr 1fr}}

/* company */
.co{display:grid;grid-template-columns:1fr 1fr;gap:80px}
.co table{width:100%;border-collapse:collapse}
.co th,.co td{padding:16px 0;border-bottom:1px solid var(--line);text-align:left;vertical-align:top;font-size:14px}
.co th{width:28%;color:var(--mute);font-weight:400;font-family:var(--en);font-size:10px;letter-spacing:.24em;text-transform:uppercase;padding-top:20px}
.shop{padding:28px 0;border-bottom:1px solid var(--line)}
.shop h4{font-family:var(--serif);font-weight:500;font-size:22px;margin:0 0 8px}
.shop p{margin:0;font-size:14px;color:var(--mute)}
.shop .tel{font-family:var(--en);font-size:26px;color:var(--ink);letter-spacing:.06em;font-weight:300;margin-top:8px}
.shop a{font-size:12px;color:var(--acc)}
@media (max-width:860px){.co{grid-template-columns:1fr;gap:30px}}

/* cta */
.cta{position:relative;padding:160px 0;text-align:center;overflow:hidden}
.cta:before{content:"";position:absolute;inset:0;background:url(https://images.unsplash.com/photo-1486406146926-c627a92ad1ab?w=2000&q=60) center/cover;opacity:.22;filter:grayscale(1)}
.cta .wrap{position:relative}
.cta h2{font-size:40px;letter-spacing:.06em;margin-bottom:16px}
.cta p{color:var(--mute);margin-bottom:40px}
.cta .tel{font-family:var(--en);font-weight:200;font-size:44px;letter-spacing:.08em;text-decoration:none;display:block;margin-bottom:30px}
@media (max-width:700px){.cta{padding:100px 0}.cta h2{font-size:28px}.cta .tel{font-size:32px}}

/* footer */
.ft{border-top:1px solid var(--line);padding:60px 0 100px;color:var(--mute);font-size:12px}
.ft .wrap{display:flex;justify-content:space-between;flex-wrap:wrap;gap:20px;align-items:flex-end}
.ft .big{font-family:var(--en);font-size:clamp(48px,10vw,140px);font-weight:200;letter-spacing:.2em;color:var(--ink);line-height:1;width:100%;opacity:.9}
.ft nav a{text-decoration:none;color:var(--mute);margin-right:24px;font-family:var(--en);letter-spacing:.2em;font-size:10px;text-transform:uppercase}

/* sub hero */
.phero{padding:200px 0 90px;border-bottom:1px solid var(--line)}
.phero h1{font-size:clamp(40px,6vw,80px);letter-spacing:.06em;margin-top:20px}
@media (max-width:700px){.phero{padding:140px 0 60px}}

/* pillars */
.pil{display:grid;grid-template-columns:repeat(3,1fr);gap:40px}
.pil div{border-top:1px solid var(--acc);padding-top:26px}
.pil .n{font-family:var(--en);font-size:12px;letter-spacing:.3em;color:var(--acc);margin-bottom:14px}
.pil h3{font-size:24px;margin-bottom:12px}
.pil p{color:var(--mute);font-size:14px;margin:0}
@media (max-width:760px){.pil{grid-template-columns:1fr}}

/* modal */
.wd-modal{position:fixed;inset:0;z-index:100}
.wd-backdrop{position:absolute;inset:0;background:rgba(0,0,0,.85)}
.wd-panel{position:absolute;left:50%;top:4%;transform:translateX(-50%);width:min(1000px,94vw);max-height:92vh;overflow:auto;background:var(--bg-2);border:1px solid var(--line)}
.wd-close{position:absolute;right:14px;top:14px;width:44px;height:44px;border:1px solid var(--line);background:var(--bg);color:var(--ink);font-size:22px;cursor:pointer;z-index:1}
.wd-fig{margin:0}
.wd-fig img{width:100%;aspect-ratio:16/9;object-fit:cover}
.wd-body{padding:40px 48px 56px}
.wd-meta{display:flex;gap:22px;font-family:var(--en);font-size:10px;letter-spacing:.24em;color:var(--acc);text-transform:uppercase;margin-bottom:14px}
.wd-title{font-size:32px;letter-spacing:.04em;margin-bottom:14px}
.wd-summary{color:var(--ink)}
.wd-text p{color:var(--mute)}
@media (max-width:600px){.wd-body{padding:24px}}

/* reveal */
.rv{opacity:0;transform:translateY(24px);transition:1s cubic-bezier(.2,.7,.2,1)}
.rv.in{opacity:1;transform:none}

/* SP bar */
.sbar{display:none;position:fixed;left:0;right:0;bottom:0;z-index:60;background:rgba(14,14,14,.92);backdrop-filter:blur(10px);border-top:1px solid var(--line);padding:10px 16px;gap:10px}
.sbar a{flex:1;text-align:center;text-decoration:none;font-family:var(--en);font-size:11px;letter-spacing:.2em;padding:12px;border:1px solid var(--line)}
.sbar a.f{background:var(--ink);color:var(--bg);border-color:var(--ink)}
@media (max-width:760px){.sbar{display:flex}}