@import url('../assets/quan-fonts-full.css');

:root{
  --ink:#111315;--white:#FFFFFF;--mist:#F3F4F2;--gray:#62686C;--line:#D5D8DC;--ctl:#72787F;--yellow:#E8ED3B;
  --pale:#8A9094;--dark-sub:#BFC6CA;
  --max:1200px;--pad:40px;
  --jp:"Zen Kaku Gothic Antique",sans-serif;--en:"Quan Continuum",Inter,sans-serif;--ui:Inter,"Zen Kaku Gothic Antique",sans-serif;
  --fb:180ms;
}
@media (prefers-reduced-motion:reduce){:root{--fb:0ms}html{scroll-behavior:auto!important}}
*{box-sizing:border-box}
html{scroll-behavior:smooth;scroll-padding-top:24px}
body{margin:0;background:var(--white);color:var(--ink);font:400 18px/1.8 var(--jp);letter-spacing:0;-webkit-font-smoothing:antialiased;font-synthesis:none}
h1,h2,h3,h4,p,figure,ol,ul{margin:0}
h1,h2,h3,h4{font-weight:900;line-height:1.35;text-wrap:balance;word-break:auto-phrase}
ol,ul{padding:0;list-style:none}
img,svg{display:block;max-width:100%}
a{color:inherit}
a:focus-visible,button:focus-visible,summary:focus-visible{outline:2px solid var(--ink);outline-offset:2px;box-shadow:0 0 0 4px var(--white)}
.dark a:focus-visible{outline-color:var(--yellow);box-shadow:none}
.wrap{max-width:calc(var(--max) + var(--pad)*2);margin:0 auto;padding:0 var(--pad)}
.skip{position:absolute;left:16px;top:-80px;z-index:50;background:var(--yellow);color:var(--ink);padding:12px 16px;text-decoration:none;font-weight:900}
.skip:focus{top:12px}
.num{font-family:var(--ui);font-variant-numeric:tabular-nums}
.label{display:flex;align-items:center;gap:12px;font:500 12px/1.4 var(--ui);letter-spacing:.14em;color:var(--gray);text-transform:uppercase;margin-bottom:24px}
.label .sq{width:9px;height:9px;background:var(--yellow);flex:none}
.label .en{font-family:var(--en);font-size:15px;letter-spacing:.06em;text-transform:none;color:var(--ink)}
.dark .label,.dark .label .en{color:var(--dark-sub)}
.section{padding:120px 0}
.section h2{font-size:40px;line-height:1.35;max-width:24em}
.lead{font-size:18px;line-height:1.85;max-width:36em;margin-top:24px}
.small{font-size:14px;line-height:1.7;color:var(--gray)}
.src{font-size:12px;line-height:1.6;color:var(--gray);margin-top:12px}
.btn{display:inline-flex;align-items:center;justify-content:center;gap:12px;min-height:48px;padding:12px 24px;border-radius:4px;border:1px solid var(--ink);background:var(--ink);color:var(--white);text-decoration:none;font-weight:900;font-size:16px;line-height:1.4;transition:background var(--fb),color var(--fb),border-color var(--fb)}
.btn:hover{background:#2A2E31}
.btn-yellow{background:var(--yellow);border-color:var(--yellow);color:var(--ink)}
.btn-yellow:hover{background:#D9DE2A;border-color:#D9DE2A}
.btn-ghost{background:transparent;color:var(--white);border-color:#72787F}
.btn-ghost:hover{background:#1E2124;border-color:#A7ADB1}
.btn .ar{font-family:var(--ui);font-weight:500}

/* header */
.site-header{position:absolute;top:0;left:0;right:0;z-index:10;color:var(--white)}
.site-header .wrap{height:88px;display:flex;align-items:center;justify-content:space-between;gap:24px}
.brand-tag{display:flex;align-items:center;gap:12px;font:500 12px/1 var(--ui);letter-spacing:.14em;text-decoration:none;white-space:nowrap}
.brand-tag .sq{width:9px;height:9px;background:var(--yellow)}
.gnav{display:flex;align-items:center;gap:28px;font-size:14px;font-weight:400}
.gnav a{text-decoration:none;opacity:.86;min-height:48px;display:flex;align-items:center;transition:opacity var(--fb)}
.gnav a:hover{opacity:1}
.gnav .gnav-cta{opacity:1;border:1px solid #72787F;border-radius:4px;padding:0 18px;font-weight:900}

/* hero */
.hero{position:relative;background:var(--ink);color:var(--white);min-height:clamp(760px,100svh,960px);overflow:hidden}
/* ロゴは上、コピーは下。中身が高い画面でも重ならないよう、絶対配置ではなく縦の並びで組む */
.hero .wrap{position:relative;z-index:2;display:flex;flex-direction:column;min-height:inherit;padding-top:132px;padding-bottom:72px}
.hero-wordmark{width:clamp(320px,44vw,640px);height:auto}
.hero-copy{margin-top:auto;padding-top:56px;max-width:500px}
.hero-copy .label{color:var(--dark-sub);margin-bottom:20px}
.hero h1{font-size:64px;line-height:1.35}
.hero-sub{margin-top:24px;color:var(--dark-sub);font-size:17px;line-height:1.9;max-width:31em}
.hero-cta{display:flex;flex-wrap:wrap;gap:16px;margin-top:32px}
/* 波の左端は本文の右、黄色点は画面内、右端は画面外へ（KV構図）。点はSVG幅の71.1%地点 */
.hero-wave{position:absolute;z-index:1;width:min(82vw,1300px);max-width:none;height:auto;left:calc((100vw - 1280px)/2 + 460px);top:12%;pointer-events:none}

/* services strip */
.services{padding:72px 0 88px;border-bottom:1px solid var(--line)}
.services-head{display:flex;justify-content:space-between;align-items:flex-end;gap:24px;margin-bottom:32px}
.services-head h2{font-size:28px}
.services-head p{font-size:15px;color:var(--gray);margin-top:8px}
.svc-grid{display:grid;grid-template-columns:repeat(5,1fr);gap:16px}
.svc{position:relative;display:flex;flex-direction:column;gap:6px;min-height:168px;padding:20px 20px 18px;border:1px solid var(--line);border-radius:8px;text-decoration:none;background:var(--white);transition:border-color var(--fb),background var(--fb)}
.svc:hover{border-color:var(--ink)}
.svc .grp{font-size:12px;color:var(--gray);line-height:1.4}
.svc .en{font:600 12px/1.3 var(--ui);letter-spacing:.12em}
.svc .jp{font-size:19px;font-weight:900;line-height:1.35}
.svc .ds{font-size:13.5px;line-height:1.65;color:#3E4447}
.svc .go{margin-top:auto;font:500 13px var(--ui);display:flex;justify-content:space-between;align-items:center;padding-top:8px}
.svc .go i{width:8px;height:8px;background:var(--yellow);opacity:0;transition:opacity var(--fb)}
.svc:hover .go i{opacity:1}
.svc-zoo{background:var(--ink);border-color:var(--ink);color:var(--white)}
.svc-zoo:hover{background:#24282B}
.svc-zoo .grp,.svc-zoo .ds{color:var(--dark-sub)}

/* second view + contrast */
.view-grid{display:grid;grid-template-columns:1.05fr 1fr;gap:64px;align-items:center}
.view-grid h2{font-size:44px;line-height:1.4}
.view-figure img{width:100%;height:auto;border-radius:8px}
.view-figure figcaption{display:flex;justify-content:space-between;gap:16px;margin-top:12px;font:500 11px/1.5 var(--ui);letter-spacing:.12em;color:var(--gray)}
.view-figure figcaption span:last-child{font-family:var(--jp);letter-spacing:0;font-size:13px}
.vs{margin-top:88px;border-top:2px solid var(--ink)}
.vs-row{display:grid;grid-template-columns:150px minmax(0,1fr) minmax(0,1.45fr);gap:32px;padding:24px 0;border-bottom:1px solid var(--line);align-items:start}
.vs-head{padding:16px 0}
.vs-head span{font-size:13px;font-weight:900;color:var(--pale)}
.vs-head .r{display:flex;align-items:center;gap:10px;color:var(--ink)}
.vs-head .r i{width:9px;height:9px;background:var(--yellow);outline:1px solid var(--ink)}
.vs .k{font-size:13px;color:var(--gray);padding-top:4px}
.vs .l{font-size:15px;line-height:1.75;color:var(--pale)}
.vs .r h3{font-size:21px;line-height:1.55}
.vs .r p{font-size:15px;line-height:1.8;color:#3E4447;margin-top:6px}
.fact{display:grid;grid-template-columns:auto 1fr;gap:32px;align-items:center;margin-top:48px;padding:28px 32px;background:var(--mist);border-radius:8px}
.fact .big{font:600 64px/1 var(--ui);letter-spacing:-.02em}
.fact .big small{font-size:28px}
.fact p{font-size:16px;line-height:1.8}

/* perspective */
.persp{background:var(--white);border-top:1px solid var(--line)}
.thesis-list{margin-top:56px;border-top:1px solid var(--ink)}
.thesis{display:grid;grid-template-columns:180px minmax(0,1fr);gap:40px;padding:48px 0;border-bottom:1px solid var(--line)}
.thesis .tn{font:600 52px/1 var(--ui)}
.thesis .tn span{display:block;margin-top:14px;font:400 15px/1.3 var(--en);letter-spacing:.06em;color:var(--gray)}
.thesis h3{font-size:30px;line-height:1.45}
.thesis p{margin-top:18px;font-size:17px;line-height:1.95;max-width:38em}

/* human x ai */
.loop-wrap{margin-top:56px;display:grid;grid-template-columns:1.25fr 1fr;gap:56px;align-items:center}
.loop-wrap svg{width:100%;height:auto}
.loop-text h3{font-size:26px}
.loop-text p{margin-top:16px;font-size:16.5px;line-height:1.9}
.duo{display:grid;grid-template-columns:1fr 1fr;gap:24px;margin-top:56px}
.duo > div{border-top:2px solid var(--ink);padding-top:20px}
.duo .big{font:600 56px/1 var(--ui)}
.duo .big small{font-size:22px;font-family:var(--jp);font-weight:900;margin-left:4px}
.duo p{margin-top:12px;font-size:16px;line-height:1.8}

/* companies */
.companies{background:var(--mist)}
.ice{margin-top:56px;background:var(--white);border-radius:8px;padding:40px}
.ice svg{width:100%;max-width:900px;margin:0 auto;height:auto}
.steps{margin-top:64px;display:grid;gap:0;counter-reset:s;border-top:1px solid var(--ink)}
.step{display:grid;grid-template-columns:72px minmax(0,1fr);gap:24px;padding:32px 0;border-bottom:1px solid var(--line)}
.step::before{counter-increment:s;content:counter(s);width:44px;height:44px;display:flex;align-items:center;justify-content:center;background:var(--yellow);font:700 20px var(--ui)}
.step h3{font-size:24px}
.step p{margin-top:10px;font-size:16.5px;line-height:1.9;max-width:44em}
.phases{margin-top:56px;display:grid;grid-template-columns:repeat(4,1fr);border:1px solid var(--ink);background:var(--white);border-radius:8px;overflow:hidden}
.phase{padding:24px;border-right:1px solid var(--line)}
.phase:last-child{border-right:0}
.phase .tn{font:600 12px var(--ui);letter-spacing:.1em;color:var(--gray)}
.phase h4{font-size:19px;margin:8px 0 8px}
.phase p{font-size:14px;line-height:1.75;color:#3E4447}

/* how */
.layers{margin-top:56px;display:grid;gap:12px}
.layer{display:grid;grid-template-columns:240px minmax(0,1fr);border:1px solid var(--ink);border-radius:8px;overflow:hidden}
.layer .ln{background:var(--ink);color:var(--white);padding:24px;font-size:20px;font-weight:900;line-height:1.4}
.layer .ln span{display:block;font:400 14px var(--en);letter-spacing:.06em;color:var(--dark-sub);margin-bottom:6px}
.layer .ld{padding:24px 28px;font-size:16.5px;line-height:1.85}
.field{margin-top:24px;border-left:4px solid var(--yellow);background:var(--mist);padding:28px 32px;border-radius:0 8px 8px 0}
.field h3{font-size:22px}
.field ul{margin-top:14px;display:grid;gap:8px}
.field li{font-size:16px;line-height:1.8;padding-left:20px;position:relative}
.field li::before{content:"";position:absolute;left:0;top:.75em;width:8px;height:1px;background:var(--ink)}

/* proof */
.proof{background:var(--mist)}
.proof-grid{display:grid;grid-template-columns:1fr 1fr;gap:24px;margin-top:48px}
.proof-card{background:var(--white);border-radius:8px;padding:32px}
.proof-card h3{font-size:20px;display:flex;align-items:center;gap:10px}
.proof-card h3 i{width:9px;height:9px;background:var(--ink)}
.proof-card.next h3 i{background:var(--yellow);outline:1px solid var(--ink)}
.proof-card ul{margin-top:16px;display:grid;gap:12px}
.proof-card li{font-size:15.5px;line-height:1.8;padding-left:18px;position:relative}
.proof-card li::before{content:"";position:absolute;left:0;top:.8em;width:7px;height:1px;background:var(--ink)}
.places{display:grid;grid-template-columns:repeat(3,1fr);gap:24px;margin-top:56px}
.place{border-top:2px solid var(--ink);padding-top:18px}
.place h4{font-size:19px}
.place p{margin-top:10px;font-size:15px;line-height:1.8}

/* company */
.company-grid{display:grid;grid-template-columns:1fr 1fr;gap:64px;align-items:center}
.company-grid img{width:100%;height:auto;border-radius:8px}
.vm{display:grid;grid-template-columns:1fr 1fr;gap:24px;margin-top:64px}
.vm > div{border:1px solid var(--line);border-radius:8px;padding:32px}
.vm .en{font:400 15px var(--en);letter-spacing:.08em;color:var(--gray)}
.vm h3{font-size:24px;margin-top:8px}
.vm p{margin-top:12px;font-size:15.5px;line-height:1.85}
.name-note{margin-top:48px;display:grid;grid-template-columns:120px minmax(0,1fr);gap:32px;align-items:start}
.name-note img{width:96px;height:auto}
.name-note h3{font-size:22px}
.name-note p{margin-top:10px;font-size:16px;line-height:1.9;max-width:44em}

/* contact */
.contact{background:var(--ink);color:var(--white);position:relative;overflow:hidden}
.contact .wave-bg{position:absolute;right:-18%;bottom:-30%;width:min(90vw,1100px);opacity:.35;pointer-events:none}
.contact .wrap{position:relative}
.contact h2{font-size:44px;color:var(--white)}
.contact .lead{color:var(--dark-sub)}
.contact .hero-cta{margin-top:40px}

/* footer */
.site-footer{background:var(--ink);color:var(--dark-sub);border-top:1px solid #2A2E31;padding:40px 0}
.site-footer .wrap{display:flex;justify-content:space-between;align-items:center;gap:24px;flex-wrap:wrap}
.site-footer img{width:120px;height:auto}
.site-footer nav{display:flex;gap:24px;font-size:13px;flex-wrap:wrap}
.site-footer nav a{text-decoration:none;min-height:48px;display:flex;align-items:center}
.site-footer small{font:400 12px var(--ui)}

/* responsive */
@media (max-width:1180px){
  .hero-wave{width:96vw;left:36vw;top:1%}
  .hero-copy{max-width:440px}
  .hero h1{font-size:52px}
}
@media (max-width:1023px){
  :root{--pad:24px}
  .gnav a:not(.gnav-cta){display:none}
  .svc-grid{grid-template-columns:repeat(2,1fr)}
  .view-grid,.loop-wrap,.company-grid{grid-template-columns:1fr;gap:40px}
  .phases{grid-template-columns:1fr 1fr}
  .phase:nth-child(2){border-right:0}
  .phase:nth-child(-n+2){border-bottom:1px solid var(--line)}
}
@media (max-width:767px){
  :root{--pad:20px}
  body{font-size:16px}
  .section{padding:72px 0}
  .section h2,.view-grid h2,.contact h2{font-size:28px}
  .lead{font-size:16px}
  .site-header .wrap{height:72px}
  .hero{min-height:0}
  .hero .wrap{min-height:0;padding-top:120px;padding-bottom:0}
  .hero-wordmark{width:min(78vw,340px)}
  .hero-copy{margin-top:0;padding-top:56px;max-width:none}
  .hero h1{font-size:40px}
  .hero-sub{font-size:15.5px}
  .hero-cta .btn{width:100%}
  .hero-wave{position:relative;left:0;top:0;width:170vw;margin:16px 0 -16% -10vw}
  .services{padding:56px 0}
  .services-head{flex-direction:column;align-items:flex-start}
  .svc-grid{grid-template-columns:1fr}
  .svc{min-height:0}
  .vs{margin-top:56px}
  .vs-head{display:none}
  .vs-row{grid-template-columns:1fr;gap:8px;padding:20px 0}
  .vs .l::before{content:"よく語られるAI活用：";font-weight:900}
  .vs .r h3{font-size:18px}
  .fact{grid-template-columns:1fr;gap:12px;padding:24px}
  .fact .big{font-size:48px}
  .thesis{grid-template-columns:1fr;gap:16px;padding:36px 0}
  .thesis .tn{font-size:36px}
  .thesis h3{font-size:22px}
  .thesis p{font-size:16px}
  .duo{grid-template-columns:1fr}
  .ice{padding:16px}
  .step{grid-template-columns:52px minmax(0,1fr);gap:16px}
  .step h3{font-size:19px}
  .step p{font-size:15.5px}
  .phases{grid-template-columns:1fr}
  .phase{border-right:0;border-bottom:1px solid var(--line)}
  .layer{grid-template-columns:1fr}
  .layer .ln{padding:18px 20px}
  .layer .ld{padding:18px 20px;font-size:15.5px}
  .field{padding:22px 20px}
  .proof-grid,.places,.vm{grid-template-columns:1fr}
  .proof-card,.vm > div{padding:24px}
  .name-note{grid-template-columns:1fr;gap:16px}
}