:root{
  --ink:#141414;
  --gray:#8a8a8a;
  --hair:#dcdcdc;
  --bg:#ffffff;
  --soft:#fafafa;
  --accent:#16323f;
  --line:#06c755;
  --jp:'Zen Kaku Gothic New',sans-serif;
  --en:'Inter',sans-serif;
}
*{margin:0;padding:0;box-sizing:border-box}
html{scroll-behavior:smooth}
body{background:var(--bg);color:var(--ink);font-family:var(--jp);font-weight:300;line-height:1.9;letter-spacing:.06em;font-feature-settings:"palt";max-width:100%;overflow-x:hidden}
img{max-width:100%;display:block}
a{color:inherit;text-decoration:none}
a:focus-visible,button:focus-visible{outline:2px solid var(--accent);outline-offset:3px}
.en{font-family:var(--en)}
.rail{display:none}
.mente-nav{position:fixed;top:0;left:0;right:0;z-index:40;background:linear-gradient(#fff 68%,rgba(255,255,255,.86) 88%,transparent);border-bottom:1px solid rgba(220,220,220,.72)}
.mente-nav-inner{display:flex;flex-wrap:wrap;align-items:center;gap:12px 18px;padding:16px 5vw 18px}
.brand-lockup{margin-right:auto;min-width:220px}
.brand-lockup .jp{font-size:16px;font-weight:400;letter-spacing:.12em;line-height:1.3}
.brand-lockup .sub{margin-top:4px;font-family:var(--en);font-size:9px;letter-spacing:.28em;color:var(--gray)}
.nav-links{display:flex;flex-wrap:wrap;gap:12px 18px;font-family:var(--en);font-size:10px;letter-spacing:.28em;color:var(--gray)}
.nav-links a:hover,.nav-links a.active{color:var(--ink)}
.nav-actions{display:flex;gap:8px;align-items:center;margin-left:auto}
.mini-action{display:inline-flex;align-items:center;justify-content:center;min-height:34px;border:1px solid var(--hair);padding:8px 12px;font-size:11px;letter-spacing:.12em;color:var(--ink);background:#fff}
.mini-action.line{border-color:var(--line);color:#fff;background:var(--line)}
main{padding-top:142px}
section{padding:88px 6vw}
.container{max-width:1080px;margin:0 auto}
.narrow{max-width:760px}
.crumb{font-family:var(--en);font-size:10px;letter-spacing:.36em;color:var(--gray);margin-bottom:38px}
.crumb a:hover{color:var(--ink)}
.sec-label{font-family:var(--en);font-size:11px;letter-spacing:.42em;color:var(--gray);margin-bottom:40px;display:flex;align-items:center;gap:18px;line-height:1.4}
.sec-label::after{content:"";height:1px;flex:0 1 56px;background:var(--hair)}
.page-head{padding:0 6vw 72px}
.page-head .en-title{font-family:var(--en);font-weight:300;font-size:42px;letter-spacing:.06em;line-height:1.1}
.page-head .jp-title{font-size:14px;letter-spacing:.28em;color:var(--gray);margin-top:20px}
.page-head::after{content:"";display:block;width:64px;height:1px;background:var(--ink);margin-top:40px}
.hero{min-height:calc(100svh - 64px);display:flex;align-items:center;position:relative;padding:128px 6vw 92px;overflow:hidden}
.grid-bg{position:absolute;inset:0;pointer-events:none;background-image:linear-gradient(var(--hair) 1px,transparent 1px),linear-gradient(90deg,var(--hair) 1px,transparent 1px);background-size:96px 96px;opacity:.22;mask-image:radial-gradient(ellipse at 74% 26%,#000 0%,transparent 68%)}
.hero-content{position:relative;z-index:1;max-width:760px}
.eyebrow{font-family:var(--en);font-size:10px;letter-spacing:.38em;color:var(--gray);margin-bottom:32px}
h1,.section-heading{font-weight:300;font-size:34px;line-height:1.72;letter-spacing:.1em}
h1 strong,.section-heading strong{font-weight:500}
.lead{margin-top:32px;max-width:42em;color:#444;font-size:14px}
.hero-actions,.action-row{display:flex;flex-direction:column;gap:12px;margin-top:40px}
.btn{display:inline-flex;align-items:center;justify-content:center;min-height:54px;border:1px solid var(--ink);padding:16px 28px;font-size:12px;letter-spacing:.22em;transition:background .25s,color .25s,border-color .25s}
.btn:hover{background:var(--ink);color:#fff}
.btn.line{border-color:var(--line);background:var(--line);color:#fff}
.btn.line:hover{background:#05b84f;border-color:#05b84f}
.btn.subtle{border-color:var(--hair);color:var(--gray)}
.split{display:grid;gap:48px}
.text p{font-size:14px;color:#444;margin-bottom:1.6em;max-width:42em}
.link-grid,.strength-grid{display:grid;border-top:1px solid var(--hair)}
.link-panel,.strength-item{display:block;border-bottom:1px solid var(--hair);padding:30px 0;position:relative}
.link-panel .label,.strength-item .num,.service-row .label,.case-meta,.check-num{font-family:var(--en);font-size:10px;letter-spacing:.32em;color:var(--gray)}
.link-panel h2,.strength-item h3{font-size:18px;font-weight:500;letter-spacing:.12em;margin:14px 0 8px}
.link-panel p,.strength-item p,.service-row p,.case p,.checklist li span{font-size:13px;color:#555}
.link-panel .arrow{position:absolute;right:2px;top:34px;font-family:var(--en);font-size:18px;color:var(--gray);transition:transform .25s}
.link-panel:hover .arrow{transform:translateX(6px);color:var(--ink)}
.band{background:var(--soft);border-top:1px solid var(--hair);border-bottom:1px solid var(--hair)}
.service-list{border-top:1px solid var(--hair)}
.service-row{display:grid;gap:16px;border-bottom:1px solid var(--hair);padding:32px 0}
.service-row h2{font-size:18px;font-weight:500;letter-spacing:.12em}
.works-list{display:grid;gap:56px}
.case{border-top:1px solid var(--hair);padding-top:26px}
.case-visual{aspect-ratio:4/3;background:linear-gradient(135deg,#f3f3f3,#dedede);border:1px solid var(--hair);position:relative;margin-bottom:22px}
.case-visual::after{content:"PHOTO";position:absolute;inset:0;display:grid;place-items:center;font-family:var(--en);font-size:10px;letter-spacing:.38em;color:#aaa}
.case h2{font-size:20px;font-weight:500;letter-spacing:.1em;margin:12px 0 12px}
.spec-line{display:flex;flex-wrap:wrap;gap:8px 18px;margin-top:16px;font-size:12px;color:var(--gray)}
.checklist{border-top:1px solid var(--hair);list-style:none;counter-reset:item}
.checklist li{counter-increment:item;display:grid;grid-template-columns:44px 1fr;gap:14px;padding:22px 0;border-bottom:1px solid var(--hair)}
.checklist li::before{content:"";width:18px;height:18px;border:1px solid var(--accent);margin-top:.44em}
.checklist strong{display:block;font-size:15px;font-weight:500;letter-spacing:.1em;margin-bottom:4px}
.company-list{border-top:1px solid var(--hair)}
.company-list div{display:grid;gap:4px;padding:20px 0;border-bottom:1px solid var(--hair);font-size:13.5px}
.company-list dt{color:var(--gray);letter-spacing:.2em;font-size:12px}
.company-list a{border-bottom:1px solid var(--hair)}
.contact-strip{border-top:1px solid var(--hair);padding:72px 6vw;text-align:left}
.contact-strip h2{font-size:24px;font-weight:300;line-height:1.8;letter-spacing:.12em}
.contact-strip p{margin-top:18px;color:#444;font-size:14px}
.contact-strip .tel{font-family:var(--en);letter-spacing:.16em;color:var(--gray);margin-top:16px}
.placeholder-note{font-size:12px;color:var(--gray);margin-top:12px}
.footer{border-top:1px solid var(--hair);padding:34px 6vw 44px;color:var(--gray);font-size:11px;letter-spacing:.16em}
.footer-inner{display:flex;flex-direction:column;gap:16px;max-width:1080px;margin:0 auto}
.footer .links{display:flex;flex-wrap:wrap;gap:14px 22px;font-family:var(--en);font-size:10px;letter-spacing:.24em}
.footer a:hover{color:var(--ink)}
.reveal{opacity:0;transform:translateY(28px);transition:opacity .9s ease,transform .9s ease}
.reveal.on{opacity:1;transform:none}
@media (prefers-reduced-motion:reduce){.reveal{opacity:1;transform:none;transition:none}}
@media (min-width:640px){
  .hero-actions,.action-row{flex-direction:row;flex-wrap:wrap}
  .link-grid,.strength-grid{grid-template-columns:repeat(3,1fr);border-left:1px solid var(--hair)}
  .link-panel,.strength-item{border-right:1px solid var(--hair);padding:36px 28px}
  .service-row{grid-template-columns:170px 1fr}
  .works-list{grid-template-columns:repeat(2,1fr);gap:72px 28px}
  .company-list div{grid-template-columns:180px 1fr}
}
@media (min-width:881px){
  .rail{position:fixed;left:0;top:0;bottom:0;width:72px;border-right:1px solid var(--hair);display:flex;flex-direction:column;align-items:center;justify-content:space-between;padding:32px 0;background:var(--bg);z-index:50}
  .rail .logo{display:block;width:26px}
  .rail .logo img{width:100%;height:auto}
  .rail .scroll-label{writing-mode:vertical-rl;font-size:10px;letter-spacing:.4em;color:var(--gray);font-family:var(--en)}
  .rail .line{width:1px;height:64px;background:var(--ink);margin-top:14px;animation:drop 2.4s ease-in-out infinite}
  @keyframes drop{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}}
  .mente-nav{left:72px;border-bottom:none}
  .mente-nav-inner{padding:24px 48px;gap:24px}
  .nav-links{gap:30px}
  main{margin-left:72px;padding-top:0}
  .hero{min-height:100vh;padding:150px 8vw 90px}
  h1,.section-heading{font-size:56px;line-height:1.62}
  .lead{font-size:15px}
  section{padding:128px 8vw}
  .page-head{padding:160px 8vw 80px}
  .page-head .en-title{font-size:76px}
  .split{grid-template-columns:1fr 1fr;gap:80px}
  .contact-strip{padding:96px 8vw}
  .contact-strip h2{font-size:30px}
  .footer{margin-left:72px;padding:40px 8vw}
  .footer-inner{flex-direction:row;justify-content:space-between;align-items:flex-start}
}
@media (min-width:1080px){
  .works-list{grid-template-columns:repeat(3,1fr)}
}