/* ===== CHAIN corporate site — R4 (flat / rounded / light) ===== */
:root{
  --navy:#2A3B4F;--deep:#1E2B3B;--blue:#6893C4;--sky:#A9C4E6;--yellow:#F6C544;
  --bg:#F3F5F8;--fg:#1E2B3B;--mute:#66768A;--line:#E1E6ED;--card:#FFFFFF;--soft:#E8EDF4;
  --r:28px;--r-s:16px;--ease:cubic-bezier(.2,.7,.2,1)
}
*{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth}
body{font-family:"Noto Sans JP",system-ui,-apple-system,sans-serif;background:var(--bg);color:var(--fg);line-height:1.9;-webkit-font-smoothing:antialiased;overflow-x:hidden}
img{max-width:100%;height:auto;display:block}
a{color:inherit;text-decoration:none}
.en{font-family:"Michroma",sans-serif;letter-spacing:.14em}
.jp-h{font-family:"Zen Maru Gothic","Zen Kaku Gothic New","Noto Sans JP",sans-serif;font-weight:700;letter-spacing:.02em}
.wrap{max-width:1200px;margin:0 auto;padding:0 5vw}
.wrap.narrow{max-width:800px}
.label{font-size:11px;color:var(--blue);display:flex;align-items:center;gap:12px;margin-bottom:18px}.label::before{content:"";width:28px;height:1px;background:var(--blue)}
h2{font-size:clamp(26px,3.4vw,42px);line-height:1.4}
h3{line-height:1.5}
.section{padding:clamp(64px,8vw,110px) 0}
.sec-head{display:flex;align-items:flex-end;justify-content:space-between;gap:24px;margin-bottom:40px;flex-wrap:wrap}
.sec-head p{color:var(--mute);font-size:15px;max-width:520px;margin-top:12px}
.sr{opacity:0;transform:translateY(24px);transition:opacity 1s var(--ease),transform 1s var(--ease)}.sr.in{opacity:1;transform:none}
.sp{display:none}
/* buttons */
.btn{display:inline-flex;align-items:center;gap:12px;padding:16px 28px;border-radius:999px;font-size:14px;font-weight:700;letter-spacing:.04em;transition:transform .35s var(--ease),background .3s,color .3s,box-shadow .3s;cursor:pointer;border:0;font-family:inherit}
.btn:hover{transform:translateY(-2px)}
.btn.primary{background:var(--navy);color:#fff}
.btn.yellow{background:var(--yellow);color:var(--deep)}
.btn.white{background:#fff;color:var(--navy)}
.btn.ghost{border:2px solid rgba(255,255,255,.5);color:#fff;background:transparent}
.outline{display:inline-block;border:2px solid var(--line);border-radius:999px;padding:12px 24px;font-size:13px;font-weight:700;letter-spacing:.06em;transition:background .3s,color .3s,border-color .3s;background:#fff}.outline:hover{background:var(--navy);color:#fff;border-color:var(--navy)}
/* ===== header (floating pill) ===== */
.site-header{position:fixed;top:14px;left:14px;right:14px;z-index:50;display:flex;align-items:center;justify-content:space-between;padding:10px 12px 10px 20px;background:rgba(255,255,255,.88);backdrop-filter:blur(10px);border-radius:999px;box-shadow:0 8px 30px rgba(30,43,59,.08)}
.brand img{height:22px;width:auto}
.brand .dark{display:block}.brand .light{display:none}
.nav{display:flex;gap:6px;font-size:13px;font-weight:700;align-items:center}
.nav a{padding:9px 14px;border-radius:999px;transition:background .3s}
.nav a:hover{background:var(--soft)}
.nav-cta{background:var(--navy);color:#fff!important;padding:10px 20px!important}
.nav-cta:hover{background:var(--deep)!important}
.menu-btn{display:none;width:44px;height:44px;background:none;border:0;position:relative;cursor:pointer}
.menu-btn span{position:absolute;left:11px;right:11px;height:2px;background:var(--navy);transition:transform .4s,top .4s;border-radius:2px}
.menu-btn span:first-child{top:17px}.menu-btn span:last-child{top:26px}
.menu-btn[aria-expanded="true"] span:first-child{top:21px;transform:rotate(45deg)}.menu-btn[aria-expanded="true"] span:last-child{top:21px;transform:rotate(-45deg)}
.menu{position:fixed;inset:0;z-index:40;background:var(--navy);color:#fff;opacity:0;pointer-events:none;transition:opacity .4s}
.menu.open{opacity:1;pointer-events:auto}
.menu-inner{padding:110px 8vw 40px;display:flex;flex-direction:column;gap:6px;font-size:22px;font-weight:700}
.menu-inner a.sub{font-size:14px;font-weight:400;color:var(--sky);padding-left:16px}
.menu-tel{margin-top:30px;font-size:22px}.menu-tel small{display:block;font-size:12px;color:var(--sky);font-weight:400}
/* ===== framed hero ===== */
.frame-hero{margin:0;height:100vh;min-height:560px;border-radius:0;overflow:hidden;position:relative;color:#fff;background:var(--navy)}
.frame-hero .ph{position:absolute;inset:-16% 0;background:center/cover no-repeat;will-change:transform}
.frame-hero::after{content:"";position:absolute;inset:0;background:linear-gradient(180deg,rgba(30,43,59,.15) 0%,rgba(30,43,59,.05) 40%,rgba(30,43,59,.78) 100%)}
.frame-hero .inner{position:absolute;left:6vw;right:6vw;bottom:9vh;z-index:2}
.frame-hero h1{font-size:clamp(34px,5.4vw,74px);line-height:1.2}
.frame-hero .lead{margin-top:18px;font-size:clamp(14px,1.3vw,17px);max-width:560px;color:#EAF0F7}
.frame-hero .actions{display:flex;gap:14px;margin-top:30px;flex-wrap:wrap}
.lines .ln{display:block;overflow:hidden}
.lines .ln i{display:block;font-style:normal;transform:translateY(110%);transition:transform 1s var(--ease)}
.lines.in .ln i{transform:none}
.lines .ln:nth-child(2) i{transition-delay:.12s}.lines .ln:nth-child(3) i{transition-delay:.24s}
.frame-hero .tag{position:absolute;top:26px;right:26px;z-index:2;font-size:11px;letter-spacing:.16em;color:#fff;border:1px solid rgba(255,255,255,.5);border-radius:999px;padding:6px 14px;font-family:"Michroma"}
/* ===== tiles ===== */
.tiles{display:grid;grid-template-columns:repeat(3,1fr);gap:16px}
.tile{background:var(--card);border-radius:var(--r-s);padding:30px 28px 28px;display:flex;flex-direction:column;gap:10px;position:relative;transition:transform .5s var(--ease),box-shadow .5s;box-shadow:0 2px 0 rgba(30,43,59,.04)}
.tile:hover{transform:translateY(-4px);box-shadow:0 18px 40px rgba(30,43,59,.10)}
.tile .ic{width:46px;height:46px;border-radius:14px;background:var(--soft);display:grid;place-items:center;color:var(--navy)}
.tile .ic svg{width:22px;height:22px;stroke:currentColor;fill:none;stroke-width:2;stroke-linecap:round;stroke-linejoin:round}
.tile h3{font-size:19px;margin-top:6px}
.tile p{font-size:14px;color:var(--mute);line-height:1.7}
.tile .go{position:absolute;right:20px;top:24px;width:32px;height:32px;border-radius:50%;background:var(--soft);display:grid;place-items:center;font-size:14px;transition:background .3s,color .3s}
.tile:hover .go{background:var(--navy);color:#fff}
/* ===== navy block (story) ===== */
.block{margin:0 14px;border-radius:var(--r);background:var(--navy);color:#fff;padding:clamp(56px,7vw,100px) 0}
.block .label{color:var(--sky)}.block .label::before{background:var(--sky)}
.block .mute{color:#C9D6E6}
.story .cols{display:grid;grid-template-columns:1fr 1fr;gap:6vw}
.story .txt{padding:4vh 0}
.story h2{margin-bottom:6vh}
.step{min-height:56vh;display:flex;flex-direction:column;justify-content:center;opacity:.3;transition:opacity .6s}
.step.on{opacity:1}
.step .n{font-family:"Michroma";font-size:12px;color:var(--yellow);letter-spacing:.2em}
.step h3{font-size:clamp(22px,2.4vw,30px);margin:12px 0 8px}.step p{color:#C9D6E6;font-size:15px;max-width:420px}
.story .vis{position:sticky;top:0;height:100vh;display:grid;place-items:center}
.frame{position:relative;width:100%;aspect-ratio:4/5;max-height:76vh;overflow:hidden;border-radius:var(--r);background:#000}
.frame img{position:absolute;inset:0;width:100%;height:100%;object-fit:cover;opacity:0;transform:scale(1.06);transition:opacity 1s var(--ease),transform 1.4s var(--ease)}
.frame img.on{opacity:1;transform:scale(1)}
.frame .cap{position:absolute;left:20px;bottom:18px;font-size:11px;letter-spacing:.16em;color:#fff;z-index:2;font-family:"Michroma"}
/* ===== grow-to-full image ===== */
.grow{height:220vh;position:relative}
.grow .stick{position:sticky;top:0;height:100vh;display:grid;place-items:center;overflow:hidden}
.grow .pic{width:62vw;height:62vh;border-radius:var(--r);overflow:hidden;position:relative;will-change:width,height,border-radius}
.grow .pic img{width:100%;height:100%;object-fit:cover;transform:scale(1.1);will-change:transform}
.grow .cap{position:absolute;left:0;right:0;bottom:8vh;text-align:center;color:#fff;z-index:2;opacity:0;transition:opacity .6s}
.grow .cap h2{font-size:clamp(26px,3.8vw,50px);text-shadow:0 2px 30px rgba(0,0,0,.4)}
.grow .cap p{color:#EAF0F7;margin-top:8px;font-size:15px;text-shadow:0 1px 12px rgba(0,0,0,.5)}
.grow.full .cap{opacity:1}
.grow.diagram .pic{background:#18232F}.grow.diagram .pic img{object-fit:contain;transform:none}.grow.diagram .pic svg{width:100%;height:100%;display:block}.grow .hint{display:none}
/* ===== horizontal gallery ===== */
.hscroll{position:relative}
.hscroll .stick{position:sticky;top:0;height:100vh;overflow:hidden;display:flex;flex-direction:column;justify-content:center}
.hscroll .head{padding:0 5vw 26px;display:flex;justify-content:space-between;align-items:flex-end;gap:20px}
.hscroll .track{display:flex;gap:20px;padding:0 5vw;will-change:transform}
.hcard{flex:0 0 min(520px,72vw);background:var(--card);border-radius:var(--r-s);overflow:hidden;box-shadow:0 2px 0 rgba(30,43,59,.04)}
.hcard .th{aspect-ratio:4/3;overflow:hidden}.hcard img{width:100%;height:100%;object-fit:cover}
.hcard p{padding:16px 20px 20px;font-size:14px;color:var(--mute);line-height:1.7}
.hscroll .bar{position:absolute;left:5vw;right:5vw;bottom:5vh;height:3px;background:var(--line);border-radius:3px}
.hscroll .bar i{display:block;height:100%;width:0;background:var(--navy);border-radius:3px}
/* ===== news ===== */
.news{display:grid;gap:10px}
.news a{display:grid;grid-template-columns:110px 1fr auto;gap:22px;align-items:center;padding:20px 26px;background:var(--card);border-radius:var(--r-s);font-size:15px;transition:transform .4s var(--ease),box-shadow .4s}
.news a:hover{transform:translateX(6px);box-shadow:0 12px 30px rgba(30,43,59,.08)}
.news .d{font-family:"Michroma";font-size:11px;letter-spacing:.12em;color:var(--blue)}
.news .ar{width:32px;height:32px;border-radius:50%;background:var(--soft);display:grid;place-items:center;font-size:13px}
/* ===== contact block / footer ===== */
.cta-band{margin:0 14px 14px;border-radius:var(--r);background:var(--navy);color:#fff;padding:clamp(64px,8vw,120px) 0;text-align:center;position:relative;overflow:hidden}
.cta-band::before{content:"";position:absolute;width:520px;height:520px;border-radius:50%;background:var(--blue);opacity:.18;right:-160px;top:-200px}
.cta-band::after{content:"";position:absolute;width:320px;height:320px;border-radius:50%;background:var(--yellow);opacity:.14;left:-100px;bottom:-140px}
.cta-band .wrap{position:relative;z-index:1}
.cta-band h2{font-size:clamp(24px,3.2vw,40px)}
.cta-band p{color:#EAF0F7;margin:14px auto 30px;max-width:560px;font-size:15px}
.cta-actions{display:flex;gap:14px;justify-content:center;flex-wrap:wrap}
.site-footer{padding:40px 5vw 24px;font-size:13px;color:var(--mute)}
.foot-grid{display:grid;grid-template-columns:1.4fr 1fr 1fr;gap:32px;max-width:1200px;margin:0 auto}
.foot-brand img{height:22px;width:auto;margin-bottom:16px}
.foot-brand p{line-height:2}
.foot-col{display:flex;flex-direction:column;gap:6px}
.foot-col h4{font-size:11px;color:var(--blue);margin-bottom:8px;font-family:"Michroma";letter-spacing:.14em}
.foot-col a:hover{color:var(--navy)}
.copy{text-align:center;margin-top:36px;font-size:11px;letter-spacing:.08em}
/* ===== inner pages ===== */
.page-hero{margin:14px;border-radius:var(--r);background:var(--navy);color:#fff;padding:140px 0 70px;position:relative;overflow:hidden}
.page-hero::before{content:"";position:absolute;width:480px;height:480px;border-radius:50%;background:var(--blue);opacity:.2;right:-140px;top:-220px}
.page-hero .wrap{position:relative;z-index:1}
.page-hero h1{font-size:clamp(30px,4.2vw,54px);line-height:1.3}
.page-hero .lead{margin-top:16px;max-width:620px;color:#EAF0F7;font-size:15px}
.page-hero .meta{margin-top:12px;font-size:12px;color:var(--sky);letter-spacing:.1em}
.page-hero .label{color:var(--sky)}.page-hero .label::before{background:var(--sky)}
.crumb{font-size:11px;letter-spacing:.1em;color:var(--sky);margin-bottom:18px;font-family:"Michroma"}
.prose{font-size:15.5px}
.prose h2{font-size:clamp(22px,2.4vw,30px);margin:48px 0 18px}
.prose h3{font-size:19px;margin:32px 0 10px}
.prose p{margin:0 0 18px}
.prose ul,.prose ol{margin:0 0 18px 1.4em}.prose li{margin-bottom:6px}
.prose img{border-radius:var(--r-s);margin:22px 0}
.prose a{border-bottom:1px solid var(--blue)}
.prose blockquote{border-left:3px solid var(--blue);padding-left:16px;color:var(--mute);margin:20px 0}
.prose table{width:100%;border-collapse:collapse;margin:20px 0;font-size:14px}
.prose th,.prose td{border:1px solid var(--line);padding:10px 12px;text-align:left;vertical-align:top}
.prose th{background:var(--soft);font-weight:700}
.intro{display:grid;grid-template-columns:1fr 1fr;gap:5vw;align-items:center}
.intro .pic{aspect-ratio:4/3;border-radius:var(--r);overflow:hidden}.intro .pic img{width:100%;height:100%;object-fit:cover}
.intro h2{font-size:clamp(24px,2.8vw,36px)}.intro p{margin-top:16px;color:var(--mute);font-size:15px}
.feat{display:grid;grid-template-columns:repeat(3,1fr);gap:16px}
.feat div{background:var(--card);border-radius:var(--r-s);padding:30px 28px}
.feat .n{font-family:"Michroma";font-size:11px;color:var(--blue);letter-spacing:.2em}
.feat h3{font-size:18px;margin:10px 0 8px}.feat p{font-size:14px;color:var(--mute)}
.flow{display:grid;grid-template-columns:repeat(5,1fr);gap:12px;counter-reset:f}
.flow div{background:var(--card);border-radius:var(--r-s);padding:22px 20px;counter-increment:f}
.flow div::before{content:"0" counter(f);font-family:"Michroma";font-size:11px;color:var(--blue);letter-spacing:.2em;display:block;margin-bottom:8px}
.flow h3{font-size:15px}.flow p{font-size:13px;color:var(--mute);margin-top:6px}
.faq details{background:var(--card);border-radius:var(--r-s);padding:20px 26px;margin-bottom:10px}
.faq summary{cursor:pointer;font-weight:700;font-size:16px;list-style:none;display:flex;justify-content:space-between;gap:20px;align-items:center}
.faq summary::-webkit-details-marker{display:none}
.faq summary::after{content:"+";font-family:"Michroma";color:var(--blue);flex:none}
.faq details[open] summary::after{content:"−"}
.faq details p{margin-top:12px;color:var(--mute);font-size:14.5px}
.price-table{width:100%;border-collapse:separate;border-spacing:0 8px;font-size:14.5px}
.price-table th,.price-table td{background:var(--card);padding:18px 16px;text-align:left;vertical-align:top}
.price-table tr th:first-child{border-radius:var(--r-s) 0 0 var(--r-s);font-weight:700;width:30%}
.price-table tr td:last-child{border-radius:0 var(--r-s) var(--r-s) 0}
.price-table td.p{white-space:nowrap;font-weight:700;width:20%;color:var(--navy)}
.note{font-size:12.5px;color:var(--mute);margin-top:12px}
.svc-list{display:grid;gap:10px}
.svc-row{display:grid;grid-template-columns:70px 1.1fr 1.6fr auto;gap:24px;align-items:center;padding:26px 30px;background:var(--card);border-radius:var(--r-s);transition:transform .4s var(--ease),box-shadow .4s}
.svc-row:hover{transform:translateX(6px);box-shadow:0 12px 30px rgba(30,43,59,.08)}
.svc-row .num{font-family:"Michroma";font-size:12px;color:var(--blue);letter-spacing:.2em}
.svc-row h3{font-size:19px}.svc-row p{font-size:14px;color:var(--mute)}
.svc-row .arrow{width:40px;height:40px;border-radius:50%;background:var(--soft);display:grid;place-items:center}
.info-table{width:100%;border-collapse:collapse;font-size:15px}
.info-table th,.info-table td{border-bottom:1px solid var(--line);padding:16px 8px;text-align:left;vertical-align:top}
.info-table th{width:28%;font-weight:700;color:var(--mute)}
.values{display:grid;grid-template-columns:repeat(2,1fr);gap:16px}
.values div{background:var(--card);border-radius:var(--r-s);padding:32px 30px}
.values h3{font-size:19px;margin-bottom:8px}.values p{font-size:14px;color:var(--mute)}
.message{display:grid;grid-template-columns:1fr 1.4fr;gap:5vw;align-items:start}
.message .sig{margin-top:24px;font-weight:700}.message .sig small{display:block;color:var(--mute);font-weight:400;font-size:13px}
.map{aspect-ratio:16/7;border:0;width:100%;filter:grayscale(.2);border-radius:var(--r-s)}
.article-img{aspect-ratio:16/9;overflow:hidden;border-radius:var(--r);margin-bottom:40px;background:var(--soft)}
.article-img img{width:100%;height:100%;object-fit:cover}
.article-img:empty{display:none}
.back{margin-top:48px;font-size:13px;letter-spacing:.1em}
figure.diagram{margin:0;background:#18232F;border-radius:var(--r);overflow:hidden}
figure.diagram img,figure.diagram svg{width:100%;height:auto;display:block;aspect-ratio:16/9}
.posts{display:grid;grid-template-columns:repeat(3,1fr);gap:20px}
.post .th{aspect-ratio:16/10;overflow:hidden;border-radius:var(--r-s);background:var(--soft)}
.post .th img{width:100%;height:100%;object-fit:cover;transition:transform 1s}
.post:hover .th img{transform:scale(1.05)}
.post .d{font-family:"Michroma";font-size:10px;color:var(--blue);letter-spacing:.14em;margin-top:14px;display:block}
.post h3{font-size:15px;line-height:1.6;margin-top:6px;font-weight:700}
.cases{display:grid;grid-template-columns:repeat(2,1fr);gap:20px}
.case{background:var(--card);border-radius:var(--r-s);overflow:hidden;display:flex;flex-direction:column}
.case .pic{aspect-ratio:16/9;background:center/cover no-repeat}
.case .body{padding:26px 28px 30px}
.case .body .en{font-size:11px;color:var(--blue);display:block;margin-bottom:8px}
.case h3{font-size:18px}.case p{font-size:14px;color:var(--mute);margin-top:8px}
.case .tags{display:flex;gap:8px;flex-wrap:wrap;margin-top:14px}
.case .tags span{font-size:11px;letter-spacing:.06em;background:var(--soft);border-radius:999px;padding:4px 12px;color:var(--mute)}
.gal{columns:3;column-gap:16px}
.gal figure{break-inside:avoid;margin:0 0 16px;background:var(--card);border-radius:var(--r-s);overflow:hidden}
.gal img{width:100%;height:auto;display:block}
.gal figcaption{font-size:13px;color:var(--mute);padding:12px 16px 14px;line-height:1.7}
.form{display:grid;gap:18px;max-width:720px}
.form label{display:block;font-size:13px;font-weight:700;margin-bottom:6px}
.form label small{color:var(--blue);margin-left:8px;font-weight:400}
.form input,.form textarea,.form select{width:100%;border:2px solid var(--line);background:#fff;color:var(--fg);padding:14px 16px;font:inherit;font-size:15px;border-radius:14px}
.form input:focus,.form textarea:focus,.form select:focus{outline:0;border-color:var(--blue)}
.form textarea{min-height:170px;resize:vertical}
.form .check{display:flex;gap:10px;align-items:flex-start;font-size:13px;color:var(--mute)}.form .check input{width:auto;margin-top:6px}
.contact-side{background:var(--card);border-radius:var(--r);padding:32px}
.contact-side .tel{font-family:"Michroma";font-size:24px;letter-spacing:0;display:block;margin:6px 0 4px;color:var(--navy)}
.contact-side p{font-size:13.5px;color:var(--mute)}
.two{display:grid;grid-template-columns:1.4fr .8fr;gap:5vw;align-items:start}
.lenis.lenis-smooth{scroll-behavior:auto}
/* ===== responsive ===== */
@media (max-width:960px){
  .tiles{grid-template-columns:repeat(2,1fr)}.posts{grid-template-columns:repeat(2,1fr)}.feat{grid-template-columns:1fr}.flow{grid-template-columns:repeat(2,1fr)}
  .foot-grid{grid-template-columns:1fr 1fr}
  .story .cols,.two,.message{grid-template-columns:1fr}
  .story .vis{position:relative;height:auto;padding:0 0 30px}.step{min-height:0;padding:20px 0;opacity:1}
}
@media (max-width:760px){
  .sp{display:inline}
  .nav{display:none}.menu-btn{display:block}
  .site-header{top:10px;left:10px;right:10px;padding:8px 8px 8px 16px}
  .tiles,.posts,.cases,.values,.intro,.flow{grid-template-columns:1fr}
  .svc-row{grid-template-columns:1fr;gap:8px}.svc-row .arrow{display:none}
  .foot-grid{grid-template-columns:1fr}
  .frame-hero{margin:0;height:100vh;min-height:520px}
  .block,.cta-band,.page-hero{margin-left:10px;margin-right:10px}
  .page-hero{padding:110px 0 50px}
  .grow{height:auto}.grow .stick{position:relative;height:auto}.grow .pic{width:calc(100% - 20px);height:60vh;margin:0 auto}.grow .cap{opacity:1}
  .grow.diagram .pic{height:auto;overflow-x:auto;-webkit-overflow-scrolling:touch;border-radius:16px}.grow.diagram .pic img,.grow.diagram .pic svg{width:760px;max-width:none;height:auto;aspect-ratio:16/9}.grow .hint{display:block;text-align:center;font-size:12px;color:#5B6B7D;margin-top:10px}
  .hscroll .stick{position:relative;height:auto;padding:40px 0}.hscroll .track{overflow-x:auto;scroll-snap-type:x mandatory;-webkit-overflow-scrolling:touch;padding-bottom:10px}.hcard{scroll-snap-align:start;flex-basis:78vw}.hscroll .bar{display:none}
  .news a{grid-template-columns:1fr;gap:6px}.news .ar{display:none}
  .gal{columns:1}
  figure.diagram{overflow-x:auto}figure.diagram img,figure.diagram svg{min-width:760px}
}
@media (prefers-reduced-motion:reduce){.sr,.lines .ln i{opacity:1;transform:none}.frame-hero .ph{transform:none!important}}

/* ===== 2026-09-21 坂本フィードバック: 透明ヘッダー／背景の明暗切替／全画面図の保持／フッターをダークに ===== */
body{transition:background-color .9s ease,color .9s ease}
body.is-dark{background:#18232F;color:#EAF0F7}
.site-header{background:transparent;backdrop-filter:none;box-shadow:none;padding:14px 20px}
.site-header .brand,.site-header .nav a:not(.nav-cta),.site-header .menu-btn{mix-blend-mode:difference}
.site-header .nav a:not(.nav-cta){color:#fff}
.site-header .menu-btn span{background:#fff}
.site-header .nav a.nav-cta{background:var(--yellow);color:var(--navy);mix-blend-mode:normal}
.site-header .nav a.nav-cta:hover{background:#FFD35C}
.block.story{margin:0;border-radius:0;background:transparent;color:inherit}
.block.story .step p{color:inherit;opacity:.8}
.grow{height:320vh}
.grow.diagram .pic{background:#18232F;box-shadow:0 0 0 1px rgba(255,255,255,.14),0 30px 80px rgba(0,0,0,.35)}
.grow.diagram.full .pic{box-shadow:none}
.tile.sr{transform:translateY(40px) scale(.96);transition:opacity .9s var(--ease),transform .9s var(--ease),box-shadow .5s}
.tile.sr.in{transform:none}
.cta-band{margin:0;border-radius:var(--r) var(--r) 0 0;background:#1E2B3B}
.site-footer{background:#1E2B3B;color:#A9B8CB}
.site-footer a{color:#DCE6F2}.site-footer .foot-col a:hover{color:#fff}
@media (max-width:760px){
  .block.story{margin:0}.cta-band{margin:0}
  .site-header{padding:10px 14px}
}
/* ヒーロー動画（PCのみ・写真の上にフェードイン） */
.frame-hero .ph video{position:absolute;inset:0;width:100%;height:100%;object-fit:cover;opacity:0;transition:opacity 1.4s ease}
.frame-hero .ph video.on{opacity:1}

/* ===== 2026-09-21 第3弾: ヘッダー文字色は下地の明るさをJSで判定して切替（mix-blend-modeは環境差があるため廃止） ===== */
.site-header .brand,.site-header .nav a:not(.nav-cta),.site-header .menu-btn{mix-blend-mode:normal}
.site-header .brand .lc{display:none}
.site-header.logo-light .brand .lw{display:none}.site-header.logo-light .brand .lc{display:block}
.site-header .nav a:not(.nav-cta){color:#fff;transition:color .35s,background .3s}
.site-header .nav a:not(.nav-cta):hover{background:rgba(255,255,255,.16)}
.site-header.nav-light .nav a:not(.nav-cta){color:var(--navy)}
.site-header.nav-light .nav a:not(.nav-cta):hover{background:var(--soft)}
.site-header .nav a.nav-cta{color:var(--navy)!important;background:var(--yellow)}
.site-header .nav a.nav-cta:hover{background:#FFD35C!important}
.site-header .menu-btn span{background:#fff;transition:background .35s,transform .4s,top .4s}
.site-header.nav-light .menu-btn span{background:var(--navy)}
.site-header .menu-btn[aria-expanded="true"] span{background:#fff}
/* 白いカードは背景の明暗に関係なく文字色を固定 */
.tile{color:var(--fg)}.tile p{color:var(--mute)}.hcard{color:var(--fg)}
/* リード文が中途半端に折り返さないように幅を広げる */
.frame-hero .lead{max-width:none}
.page-hero .lead{max-width:none}
.cta-band p{max-width:760px}
.step p{max-width:520px}
.sec-head p{max-width:640px}
.lead,.sec-head p,.step p,.cta-band p,.tile p,.hcard p{text-wrap:pretty}

/* ===== 2026-09-21 第4弾: CTA帯＋フッターを一体化し、左下に大きなCHAINマークを薄く（見切れ） ===== */
.foot-wrap{position:relative;overflow:hidden;background:#1E2B3B;border-radius:var(--r) var(--r) 0 0;color:#fff}
.foot-wrap::before{content:"";position:absolute;left:-150px;bottom:-170px;width:680px;height:680px;background:url(../img/mark-white.png) center/contain no-repeat;opacity:.055;pointer-events:none}
.cta-band{background:transparent;border-radius:0;overflow:visible}
.cta-band::after{display:none}
.cta-band::before{right:-160px;top:-200px}
.site-footer{background:transparent;position:relative}
@media (max-width:760px){.foot-wrap::before{width:420px;height:420px;left:-120px;bottom:-120px}}

/* ===== 2026-09-22: フッター右上の青い円 → CHAINマーク（左下と同じ薄さ） ===== */
.cta-band::before{display:none}
.foot-wrap::after{content:"";position:absolute;right:-170px;top:-190px;width:620px;height:620px;background:url(../img/mark-white.png) center/contain no-repeat;opacity:.055;pointer-events:none;transform:rotate(180deg)}
@media (max-width:760px){.foot-wrap::after{width:380px;height:380px;right:-120px;top:-120px}}

/* ===== 2026-09-22: サービス6つの見せ方 3案（/lab/tiles-a|b|c/） ===== */
/* 案A: 横スライド（大きな写真カードが固定画面で横に流れる） */
.svc-strip .scard{flex:0 0 min(560px,58vw);aspect-ratio:4/3;border-radius:var(--r);position:relative;overflow:hidden;color:#fff;padding:28px 30px;display:flex;flex-direction:column;justify-content:flex-end;gap:6px;isolation:isolate;transition:transform .5s var(--ease)}
.svc-strip .scard::before{content:"";position:absolute;inset:0;background:var(--ph) center/cover;z-index:-2;transition:transform 1s var(--ease)}
.svc-strip .scard::after{content:"";position:absolute;inset:0;background:linear-gradient(180deg,rgba(30,43,59,.15) 0%,rgba(30,43,59,.35) 45%,rgba(30,43,59,.9) 100%);z-index:-1}
.svc-strip .scard:hover{transform:translateY(-8px)}.svc-strip .scard:hover::before{transform:scale(1.06)}
.svc-strip .scard .n{position:absolute;top:24px;left:30px;font-family:"Michroma";font-size:12px;letter-spacing:.2em;color:var(--yellow)}
.svc-strip .scard h3{font-size:clamp(22px,2.3vw,32px);line-height:1.25}
.svc-strip .scard p{color:#DCE6F2;font-size:15px}
.svc-strip .scard .go{position:absolute;right:24px;bottom:24px;width:46px;height:46px;border-radius:50%;background:var(--yellow);color:var(--navy);display:grid;place-items:center;font-weight:700}
/* 案B: 重なるカード（1枚ずつ上に重なり、背景色が明→暗へ変わる） */
.svc-stack{background:var(--tone,#F3F5F8);transition:background-color .8s ease;padding:clamp(56px,7vw,100px) 0 18vh}
.svc-stack .cards{max-width:1200px;margin:0 auto;padding:0 5vw}
.stk{position:sticky;top:96px;display:grid;grid-template-columns:1.05fr 1fr;min-height:62vh;background:#fff;color:var(--fg);border-radius:var(--r);overflow:hidden;margin-bottom:28px;box-shadow:0 24px 70px rgba(30,43,59,.2);transform-origin:top center;transition:transform .35s ease,box-shadow .35s}
.stk .t{padding:clamp(28px,4.5vw,64px);display:flex;flex-direction:column;justify-content:center;gap:12px}
.stk .n{font-family:"Michroma";font-size:12px;letter-spacing:.2em;color:var(--blue)}
.stk h3{font-size:clamp(26px,3.2vw,44px);line-height:1.2}
.stk p{color:var(--mute);font-size:16px}
.stk .more{margin-top:10px;font-weight:700;color:var(--navy)}
.stk .p{background:var(--ph) center/cover}
/* 案C: パララックス格子（列ごとに速度差、写真は触れると浮かび上がる） */
.svc-grid{position:relative;overflow:hidden}
.svc-grid::before{content:"";position:absolute;width:64vw;height:64vw;border-radius:50%;background:radial-gradient(closest-side,rgba(104,147,196,.22),transparent);left:-24vw;top:-18vw;pointer-events:none}
.svc-grid .wrap{position:relative}
.svc-grid .cols3{display:grid;grid-template-columns:repeat(3,1fr);gap:16px;align-items:start}
.svc-grid .col{display:flex;flex-direction:column;gap:16px;will-change:transform}
.svc-grid .col.mid{margin-top:56px}
.svc-grid .tile{overflow:hidden;isolation:isolate;min-height:230px;justify-content:flex-end;transition:color .4s,transform .5s var(--ease),box-shadow .5s}
.svc-grid .tile::before{content:"";position:absolute;inset:0;background:var(--ph) center/cover;opacity:0;transform:scale(1.08);transition:opacity .5s,transform 1s var(--ease);z-index:-2}
.svc-grid .tile::after{content:"";position:absolute;inset:0;background:linear-gradient(180deg,rgba(30,43,59,.25),rgba(30,43,59,.85));opacity:0;transition:opacity .5s;z-index:-1}
.svc-grid .tile:hover{color:#fff;transform:translateY(-6px)}.svc-grid .tile:hover::before{opacity:1;transform:scale(1)}.svc-grid .tile:hover::after{opacity:1}
.svc-grid .tile:hover p{color:#DCE6F2}.svc-grid .tile:hover .ic{color:var(--yellow)}
@media (max-width:760px){
  .svc-strip .scard{flex-basis:80vw}
  .stk{grid-template-columns:1fr;min-height:auto;top:80px}.stk .p{aspect-ratio:16/9;order:-1}
  .svc-grid .cols3{grid-template-columns:1fr}.svc-grid .col{transform:none!important}.svc-grid .col.mid{margin-top:0}
}

/* ===== 2026-09-23 決定: サービス6つはC案（写真はマウスオーバーで浮かび上がる・パララックスなし・下からスライド登場） ===== */
.svc-grid.no-blob::before{display:none}
.tile.sr{transform:translateY(64px)}
.tile.sr.in{transform:none}

/* ===== 2026-09-27 トップのヒーローを第2ラウンドの「ネイビー×網目（マウスで動く）」に戻す ===== */
.hero{position:relative;min-height:100vh;display:grid;place-items:center;overflow:hidden;background:#141E2B radial-gradient(120% 80% at 70% 20%,#233650 0%,#141E2B 45%,#0B1118 100%);color:#fff}
#net{position:absolute;inset:0;width:100%;height:100%}
.hero .inner{position:relative;z-index:2;width:90vw;max-width:1240px;padding:110px 0 80px}
.hero .kicker{display:flex;align-items:center;gap:14px;font-size:12px;color:var(--sky);margin-bottom:26px;letter-spacing:.14em;font-family:"Michroma"}
.hero .kicker::before{content:"";width:48px;height:1px;background:var(--sky)}
.hero h1{font-size:clamp(34px,5.4vw,74px);line-height:1.22;color:#fff}
.hero .em{color:var(--sky);position:relative;display:inline-block}
.hero .em::after{content:"";position:absolute;left:0;right:0;bottom:.08em;height:.18em;background:var(--blue);opacity:.35;z-index:-1;transform:scaleX(0);transform-origin:left;animation:ul 1.2s cubic-bezier(.2,.7,.2,1) 1.2s forwards}
@keyframes ul{to{transform:scaleX(1)}}
.hero .lead{margin-top:22px;max-width:640px;color:#EAF0F7;font-size:clamp(14px,1.2vw,17px);line-height:2}
.hero .actions{display:flex;gap:14px;margin-top:34px;flex-wrap:wrap}
.hero .btn.white{background:#fff;color:var(--navy)}
.hero .btn.white:hover{background:#EAF0F7}
.hero .btn.ghost{border:1px solid rgba(255,255,255,.55);color:#fff}
.hero .reveal{opacity:0;transform:translateY(18px);animation:up .9s var(--ease) forwards}
.hero .d1{animation-delay:.15s}.hero .d2{animation-delay:.3s}.hero .d3{animation-delay:.5s}.hero .d4{animation-delay:.65s}
@keyframes up{to{opacity:1;transform:none}}
.hero .scroll{position:absolute;left:5vw;bottom:22px;z-index:2;display:flex;align-items:center;gap:10px;color:var(--sky);font-size:11px;letter-spacing:.22em;font-family:"Michroma"}
.hero .scroll i{display:block;width:1px;height:56px;background:linear-gradient(var(--sky),transparent);animation:sc 2s infinite}
@keyframes sc{0%{transform:scaleY(0);transform-origin:top}50%{transform:scaleY(1);transform-origin:top}100%{transform:scaleY(0);transform-origin:bottom}}
@media (prefers-reduced-motion:reduce){.hero .reveal{opacity:1;transform:none;animation:none}.hero .em::after{transform:scaleX(1);animation:none}.hero .scroll i{animation:none}}
@media (max-width:760px){.hero{min-height:100svh}.hero .inner{padding:96px 0 70px}.hero h1{font-size:clamp(30px,8.6vw,40px)}}
.hero h1{font-family:"Noto Sans JP",system-ui,sans-serif;font-weight:900;letter-spacing:.01em}

/* ===== 2026-09-28 セクション頭の「動く目印」（ヒーローのSCROLLと同じ動き） ===== */
.tick{display:flex;align-items:center;gap:12px;font-family:"Michroma";font-size:11px;letter-spacing:.22em;color:var(--blue);margin-bottom:18px}
.tick i{display:block;width:1px;height:40px;background:linear-gradient(var(--blue),transparent);animation:sc 2s infinite}
.block.story .tick{color:var(--sky)}.block.story .tick i{background:linear-gradient(var(--sky),transparent)}
body.is-dark .tick{color:var(--sky)}body.is-dark .tick i{background:linear-gradient(var(--sky),transparent)}
@media (prefers-reduced-motion:reduce){.tick i{animation:none}}