/* v4-backdrop-rose — layout.css（demo-kit v4）
   固定背景写真・アーチの窓（About）・各節の構図・ヘッダー・問い合わせ・フッター・スマホ。
   出所: P005 阿部労務事務所（2026-09-27 改良版）。**案件ごとに編集しない。**
   色は case.css の :root トークンから作る（color-mix）。読み込み順は layout.css → case.css。
   demo-kit 共通の base.css は読み込まない（P005 は base.css を使わずに組まれ、.hero/.section/.portrait-slot などが衝突するため） */
*{box-sizing:border-box}
html{background:var(--paper);color:var(--ink);font-family:var(--jp);scroll-behavior:smooth}
body{margin:0;overflow-x:hidden}
button,a{font:inherit}
button{cursor:pointer}
.photo-underlay{position:fixed;z-index:0;inset:0;overflow:hidden;background:color-mix(in srgb,var(--tint) 93%,black);pointer-events:none;opacity:0;transition:opacity .2s ease}
.underlay-shot{position:absolute;inset:0;margin:0;overflow:hidden;opacity:0;visibility:hidden}
.underlay-shot.is-active{opacity:1;visibility:visible}
.underlay-shot img{display:block;width:100%;height:100%;object-fit:cover;filter:saturate(.9) contrast(1.04);transform:none}
.underlay-shot::after{content:"";position:absolute;inset:0;background:color-mix(in srgb,var(--moss) 5.5%,transparent)}
.editorial-photo.has-photo::before,.editorial-photo.has-photo::after{display:none}
.editorial-photo.has-photo img{display:block;width:100%;height:100%;object-fit:cover;filter:saturate(.94) contrast(1.02)}
.site{position:relative;z-index:2;width:100%;overflow:clip;background:transparent;
  font-feature-settings:"palt";line-break:strict;}
.demo-note{display:flex;justify-content:center;gap:10px;padding:8px 20px;background:var(--coral);color:#fff;font-size:12px;letter-spacing:.05em}
.demo-note b{font-weight:800}
.demo-note .note-photo{font-style:normal;display:inline-block}
.site-header{position:sticky;z-index:20;top:0;margin-bottom:-92px;height:92px;padding:0 64px;display:flex;align-items:center;justify-content:space-between;border-bottom:1px solid rgba(255,255,255,.34);background:color-mix(in srgb,color-mix(in srgb,var(--ground-deep) 65%,var(--coral)) 55%,transparent);backdrop-filter:blur(12px);-webkit-backdrop-filter:blur(12px)}
.brand{text-decoration:none;color:#fff;display:grid;gap:4px;font-weight:800;font-size:22px;letter-spacing:.04em;text-shadow:0 1px 12px rgba(0,0,0,.18)}
.brand small{font:700 10px var(--en);letter-spacing:.18em;color:color-mix(in srgb,var(--paper) 90%,var(--coral))}
.nav{display:flex;align-items:center;gap:30px}
.nav button,.nav a{border:0;background:none;color:#fff;font-size:13px;font-weight:700;text-shadow:0 1px 10px rgba(0,0,0,.2);text-decoration:none}
.nav .nav-cta{padding:14px 20px;border-radius:999px;background:var(--coral);color:#fff}
.menu{display:none;border:0;background:var(--moss);color:#fff;border-radius:999px;padding:12px 16px;font-weight:700}
.hero{position:relative;min-height:760px;background:color-mix(in srgb,var(--ground) 75%,var(--paper-deep));isolation:isolate;overflow:hidden}
.hero::after{content:"";position:absolute;z-index:1;inset:0;background:linear-gradient(90deg,color-mix(in srgb,color-mix(in srgb,var(--moss) 16%,var(--ground-deep)) 60%,transparent) 0%,color-mix(in srgb,color-mix(in srgb,var(--moss) 16%,var(--ground-deep)) 24%,transparent) 48%,color-mix(in srgb,color-mix(in srgb,var(--moss) 16%,var(--ground-deep)) 8%,transparent) 72%),linear-gradient(0deg,color-mix(in srgb,var(--ground-deep) 42%,transparent),transparent 48%);pointer-events:none}
.hero-copy{position:absolute;z-index:3;left:92px;bottom:94px;max-width:620px;color:#fff}
.eyebrow{margin:0 0 20px;font:800 12px var(--en);letter-spacing:.18em;color:var(--moss);text-transform:uppercase}
.hero .eyebrow{margin-bottom:15px;color:color-mix(in srgb,var(--paper-deep) 80%,white);text-shadow:0 1px 14px rgba(0,0,0,.28)}
.hero h1{margin:0;font-size:68px;line-height:1.32;letter-spacing:.015em;font-weight:700;text-shadow:0 2px 22px rgba(0,0,0,.32)}
.hero-lead{margin:18px 0 0;font-size:13px;line-height:1.8;color:var(--paper);text-shadow:0 1px 12px rgba(0,0,0,.32)}
.hero-art{position:absolute;inset:0;z-index:0;background:color-mix(in srgb,var(--ground) 75%,var(--paper-deep))}
.hero-slides{position:absolute;inset:0;overflow:hidden}
.hero-slide{position:absolute;z-index:0;inset:0;margin:0;opacity:0;visibility:hidden;transition:opacity 1.2s cubic-bezier(.45,0,.2,1),visibility 0s linear 1.2s;will-change:opacity}
.hero-slide.is-active{z-index:1;opacity:1;visibility:visible;transition:opacity 1.2s cubic-bezier(.45,0,.2,1),visibility 0s}
.hero-slide.is-leaving{z-index:2;opacity:0;visibility:visible;transition:opacity 1.2s cubic-bezier(.45,0,.2,1),visibility 0s linear 1.2s}
.hero-slide img{width:100%;height:100%;object-fit:cover;display:block;transform:scale(1.28);will-change:transform}
.hero-slide.is-active img,.hero-slide.is-leaving img{animation:heroZoomOut 5.8s cubic-bezier(.2,.55,.3,1) forwards}
@keyframes heroZoomOut{from{transform:scale(1.28)}to{transform:scale(1.01)}}
.slide-controls{position:absolute;z-index:4;right:38px;bottom:42px;display:flex;gap:7px}
.slide-controls button{width:34px;height:34px;border:1px solid rgba(255,255,255,.72);border-radius:50%;background:rgba(45,53,50,.34);color:#fff;font:700 10px var(--en)}
.slide-controls button[aria-pressed="true"]{background:#fff;color:var(--moss)}
.news-ribbon{display:grid;grid-template-columns:250px 1fr auto;align-items:stretch;background:var(--moss);color:#fff}
.news-label{padding:28px 42px;background:color-mix(in srgb,var(--moss) 81%,black)}
.news-label span{display:block;font:800 11px var(--en);letter-spacing:.16em;color:color-mix(in srgb,var(--moss) 3%,var(--paper-deep))}
.news-label h2{display:block;margin:6px 0 0;font-size:20px;line-height:1.4}
.news-items{display:grid;grid-template-columns:repeat(3,1fr)}
.news-item{padding:26px 30px;border-left:1px solid rgba(255,255,255,.18)}
.news-item small{display:block;margin-bottom:8px;color:var(--paper-deep);font-size:10px}
.news-item p{margin:0;font-size:13px;font-weight:700}
.news-cms{display:flex;align-items:center;padding:24px 34px;background:var(--ochre);color:#2d2921;font-size:12px;font-weight:800;line-height:1.6}
.section{position:relative;isolation:isolate;overflow:hidden;margin:48px 0 0;padding:136px 92px}
.section>*{position:relative;z-index:2}
.section::after{content:var(--section-no);position:absolute;z-index:0;right:38px;top:10px;font:800 240px/.9 var(--en);letter-spacing:-.08em;color:color-mix(in srgb,var(--moss) 6%,transparent);pointer-events:none}
.section-head{display:grid;grid-template-columns:170px 1fr;gap:48px;margin-bottom:72px;align-items:start}
.section-head .num{padding-top:17px;font:800 12px var(--en);letter-spacing:.18em;color:var(--coral)}
.section-head h2{position:relative;margin:0;font-size:64px;line-height:1.16;letter-spacing:-.035em}
.section-head p{grid-column:2;margin:14px 0 0;max-width:700px;color:var(--muted);line-height:1.9}
.questions{--section-no:"02";background:var(--white)}
.questions::before{content:"";position:absolute;z-index:0;width:620px;height:620px;right:-250px;top:120px;border:1px solid color-mix(in srgb,var(--moss) 18%,transparent);border-radius:50%;box-shadow:0 0 0 90px color-mix(in srgb,color-mix(in srgb,var(--coral) 67%,var(--on-ground)) 5%,transparent),0 0 0 180px color-mix(in srgb,color-mix(in srgb,var(--coral) 67%,var(--on-ground)) 3%,transparent)}
.questions-layout{display:grid;grid-template-columns:minmax(0,.9fr) minmax(0,1.1fr);gap:88px;align-items:start}
.questions .section-head{display:block;margin:0}
.questions .section-head .num{display:block;margin:0 0 28px;padding:0}
.questions .section-head h2{font-size:72px;line-height:1.12}
.questions .section-head p{margin:30px 0 0;max-width:520px}
.questions .editorial-photo{height:260px;max-width:440px;margin:56px 0 0}
.question-grid{border-top:1px solid var(--line)}
.question-card{padding:31px 0;border-bottom:1px solid var(--line);display:grid;grid-template-columns:58px 1fr;column-gap:22px;align-items:start}
.question-card .item-no{grid-row:1 / span 3;padding-top:4px;font:700 13px var(--en);letter-spacing:.14em;color:var(--coral)}
.question-card small{font:800 11px var(--en);letter-spacing:.12em;color:var(--moss)}
.question-card h3{margin:10px 0 9px;font-size:23px;line-height:1.55}
.question-card p{margin:0;color:var(--muted);line-height:1.8;font-size:14px}
.pathway{--section-no:"03";background:var(--tint)}
.pathway::before{content:"";position:absolute;z-index:0;right:-8%;top:0;width:54%;height:100%;background:color-mix(in srgb,color-mix(in srgb,var(--coral) 67%,var(--on-ground)) 12%,transparent);clip-path:polygon(100% 0,100% 100%,0 100%)}
.path{display:grid;grid-template-columns:1fr 120px 1fr;align-items:stretch}
.path-card{padding:44px;border-radius:32px;background:var(--white);border:1px solid color-mix(in srgb,var(--moss) 17%,transparent)}
.path-card .step{display:inline-flex;width:44px;height:44px;align-items:center;justify-content:center;border-radius:50%;background:var(--moss);color:#fff;font:800 13px var(--en)}
.path-card h3{margin:28px 0 14px;font-size:30px;line-height:1.45}
.path-card p{margin:0;color:var(--muted);line-height:1.9}
.path-card ul{margin:26px 0 0;padding:0;list-style:none;display:grid;gap:10px}
.path-card li{padding-top:10px;border-top:1px solid var(--line);font-size:13px;font-weight:700}
.path-arrow{display:flex;align-items:center;justify-content:center;color:var(--coral);font:700 42px var(--en)}
.path-caption{margin:28px auto 0;max-width:760px;text-align:center;color:var(--moss);font-weight:800;line-height:1.8}
.neutral{--section-no:"04";background-color:var(--white);background-image:linear-gradient(color-mix(in srgb,var(--moss) 5%,transparent) 1px,transparent 1px),linear-gradient(90deg,color-mix(in srgb,var(--moss) 5%,transparent) 1px,transparent 1px);background-size:32px 32px}
.neutral-grid{display:grid;grid-template-columns:1fr 1fr;gap:20px}
.neutral-card{padding:42px;border-radius:var(--radius);border:1px solid var(--line)}
.neutral-card.accent{background:color-mix(in srgb,var(--on-ground) 15%,var(--paper));border-color:color-mix(in srgb,var(--tint) 77%,var(--coral))}
.neutral-card h3{margin:0 0 18px;font-size:25px;line-height:1.5}
.neutral-card p{margin:0;color:var(--muted);line-height:1.9}
.neutral-card .tag{display:inline-block;margin-top:26px;padding:9px 12px;border-radius:999px;background:var(--paper-deep);color:var(--moss);font-size:11px;font-weight:800}
.editorial-photo{position:relative;height:380px;margin:0 0 64px;border-radius:2px 56px 2px 2px;overflow:hidden;background:linear-gradient(135deg,color-mix(in srgb,var(--tint) 89%,var(--coral)),var(--paper) 58%,color-mix(in srgb,var(--moss) 23%,var(--on-ground)));box-shadow:var(--shadow)}
.editorial-photo::before{content:"";position:absolute;inset:0;background:linear-gradient(115deg,transparent 0 58%,color-mix(in srgb,var(--moss) 20%,transparent) 58% 72%,transparent 72%),radial-gradient(circle at 18% 80%,rgba(255,255,255,.86),transparent 28%)}
.editorial-photo::after{content:"PHOTO";position:absolute;right:34px;bottom:-20px;font:800 120px/1 var(--en);letter-spacing:-.05em;color:rgba(255,255,255,.24)}
.contact{margin-top:96px;padding:100px 92px;background:transparent;color:#fff;display:grid;grid-template-columns:1fr 1fr;gap:80px;align-items:end;text-shadow:0 2px 18px color-mix(in srgb,color-mix(in srgb,var(--ground) 62%,black) 44%,transparent)}
.contact>div:first-child{padding:38px 42px;border:1px solid rgba(255,255,255,.34);border-radius:28px;background:color-mix(in srgb,color-mix(in srgb,var(--ground-deep) 66%,var(--moss)) 74%,transparent)}
.contact .eyebrow{color:var(--on-ground)}
.contact h2{margin:0;font-size:48px;line-height:1.4}
.contact p{line-height:1.8}
.contact-box{padding:34px;border-radius:28px;background:color-mix(in srgb,color-mix(in srgb,var(--ground-deep) 66%,var(--moss)) 74%,transparent);border:1px solid rgba(255,255,255,.34)}
.contact-box .phone{margin:6px 0 16px;font:700 36px var(--en)}
.contact-box a{display:inline-flex;margin-top:12px;padding:15px 20px;border-radius:999px;background:var(--white);color:var(--coral);text-decoration:none;font-weight:800}
.footer{padding:34px 92px;background:color-mix(in srgb,var(--ground) 77%,var(--ink));color:color-mix(in srgb,var(--moss) 15%,var(--paper));font-size:11px;display:flex;justify-content:space-between}
.pending{display:inline-block;margin-top:12px;padding:7px 9px;background:var(--paper-deep);color:color-mix(in srgb,var(--coral) 50%,var(--ground-deep));border-radius:8px;font-size:11px;font-weight:800}
.toast{position:fixed;z-index:100;left:50%;bottom:22px;transform:translateX(-50%);padding:14px 18px;border-radius:999px;background:#202522;color:#fff;box-shadow:0 12px 40px rgba(0,0,0,.3);font-size:13px}
@media(min-width:761px) and (max-width:1180px){
  .section{padding:104px 48px}
  .section-head{grid-template-columns:1fr;gap:18px;margin-bottom:56px}
  .section-head p{grid-column:1}
  .section-head h2{font-size:clamp(40px,5vw,56px)}
  .questions-layout{grid-template-columns:1fr;gap:56px}
  .questions .section-head h2{font-size:clamp(44px,5.6vw,64px)}
  .path{grid-template-columns:1fr;gap:20px}
  .path-arrow{transform:rotate(90deg);height:40px}
  .hero h1{font-size:clamp(44px,6vw,64px)}
  .contact{padding:88px 48px;grid-template-columns:1fr;gap:28px}
}
h1,h2,h3{word-break:auto-phrase}
@media(max-width:760px){
  .demo-note{font-size:10px;display:block;text-align:center;line-height:1.7;line-break:strict}
  .demo-note b,.demo-note span{display:block}
  .site-header{height:72px;padding:0 20px}
  .brand{font-size:17px}
  .nav{display:none}
  .menu{display:block}
  .hero{min-height:620px}
  .hero-copy{left:24px;right:24px;bottom:76px}
  .hero-art{position:absolute;inset:0}
  .hero h1{font-size:36px;line-height:1.4}
  .hero-lead{font-size:11px;line-height:1.7}
  .slide-controls{right:auto;left:20px;bottom:20px}
  .news-ribbon{display:block}
  .news-label{padding:22px 24px}
  .news-items{display:block}
  .news-item{padding:18px 24px;border-left:0;border-top:1px solid rgba(255,255,255,.18)}
  .news-cms{padding:16px 24px}
  .section{margin:26px 0 0;padding:72px 24px}
  .section-head{display:block;margin-bottom:34px}
  .section::after{right:-14px;top:20px;font-size:104px}
  .section-head .num{padding-top:0;margin-bottom:18px;display:block}
  .section-head h2{font-size:42px;line-height:1.2}
  .section-head p{margin-top:12px}
  .editorial-photo{height:310px;margin-bottom:36px;border-radius:2px 34px 2px 2px}
  .editorial-photo::after{right:8px;bottom:-8px;font-size:66px}
  .questions-layout{grid-template-columns:1fr;gap:48px}
  .questions .section-head h2{font-size:46px}
  .questions .editorial-photo{height:200px;margin:36px 0 0}
  .question-grid,.neutral-grid{grid-template-columns:1fr}
  .question-card{grid-template-columns:42px 1fr;column-gap:14px;padding:24px 0}
  .question-card h3{font-size:20px}
  .path{grid-template-columns:1fr}
  .path-arrow{height:70px;transform:rotate(90deg)}
  .path-card{padding:28px}
  .path-card h3{font-size:24px}
  .contact{margin-top:64px;padding:72px 24px;grid-template-columns:1fr;gap:24px}
  .contact>div:first-child{padding:28px 24px}
  .contact h2{font-size:34px}
  .contact-box .phone{font-size:28px}
  .footer{padding:28px 24px;display:grid;gap:8px}
}
@media(prefers-reduced-motion:reduce){
  .hero-slide,.hero-slide.is-active,.hero-slide.is-leaving,.underlay-shot,.underlay-shot.is-active{transition:none}
  .hero-slide img,.hero-slide.is-active img,.hero-slide.is-leaving img{animation:none;transform:scale(1.04)}
}
.underlay-shot{transition:opacity .9s ease,visibility .9s}
.underlay-about img{object-position:22% center}
.about-d{--section-no:"";margin-top:0;padding:0;background:transparent;color:#fff;overflow:hidden}
.about-d::after{content:none}
.about-d-inner{position:relative;z-index:1;padding:120px 92px 110px}
.about-d-line,.about-d-roles{position:relative;z-index:2}
.about-d-stage{position:relative;display:grid;grid-template-columns:minmax(0,1fr) 400px;gap:0;align-items:end}
.about-d-window{position:relative;z-index:1;min-height:860px;padding:250px 76px 64px;display:flex;flex-direction:column;justify-content:flex-end;
  border-radius:480px 480px 6px 6px;
  background:linear-gradient(180deg,color-mix(in srgb,var(--ground-deep) 8%,transparent) 0%,color-mix(in srgb,var(--ground-deep) 22%,transparent) 42%,color-mix(in srgb,var(--ground-deep) 72%,transparent) 100%);
  box-shadow:0 0 0 2400px var(--ground)}
.about-d-window::before{content:"";position:absolute;inset:18px;border:1px solid rgba(255,255,255,.5);border-radius:462px 462px 2px 2px;pointer-events:none}
.about-d-window::after{content:"";position:absolute;left:-26px;right:26px;top:-26px;bottom:26px;border:1px solid color-mix(in srgb,var(--on-ground) 34%,transparent);border-radius:480px 480px 6px 6px;pointer-events:none}
.about-d-head{position:absolute;left:0;right:0;top:120px;text-align:center}
.about-d-head .num{display:block;font:800 11px var(--en);letter-spacing:.24em;color:#fff}
.about-d-head h2{margin:10px 0 0;font-size:15px;font-weight:700;letter-spacing:.16em;color:#fff;text-shadow:0 1px 14px color-mix(in srgb,color-mix(in srgb,var(--moss) 25%,black) 50%,transparent)}
.about-d-quote{margin:0;padding:0}
.about-d-quote p{margin:0;font-size:clamp(38px,4.3vw,64px);line-height:1.22;font-weight:700;text-shadow:0 4px 30px color-mix(in srgb,color-mix(in srgb,var(--moss) 25%,black) 45%,transparent)}
.about-d-quote .ln{display:block;overflow:hidden;padding-bottom:.06em}
.about-d-quote .ln>span{display:inline-block;white-space:nowrap;transform:translateY(105%);transition:transform 1.1s cubic-bezier(.2,.7,.1,1)}
.about-d-quote .ln:nth-child(2)>span{transition-delay:.14s}
.about-d-quote .ln:nth-child(3)>span{transition-delay:.28s}
.about-d-window.is-in .ln>span{transform:none}
.about-d-quote footer{margin-top:22px;font-size:12px;line-height:1.7;color:color-mix(in srgb,var(--coral) 8%,var(--tint));opacity:0;transition:opacity 1s .7s}
.about-d-name{margin:36px 0 0;padding-top:26px;border-top:1px solid rgba(255,255,255,.42);font-size:40px;font-weight:700;letter-spacing:.18em;line-height:1.25;opacity:0;transition:opacity 1s .9s}
.about-d-name small{display:block;margin-bottom:6px;font-size:12px;letter-spacing:.2em;color:var(--on-ground)}
.about-d-window.is-in footer,.about-d-window.is-in .about-d-name{opacity:1}
.about-d-portrait{position:relative;z-index:2;margin:0 0 0 -56px;opacity:0;transform:translateY(30px);transition:opacity 1s .4s,transform 1s .4s}
.about-d-portrait.is-in{opacity:1;transform:none}
.portrait-slot{position:relative;aspect-ratio:4/5;border-radius:4px 4px 180px 4px;overflow:hidden;background:linear-gradient(160deg,color-mix(in srgb,var(--paper-deep) 80%,white) 0%,color-mix(in srgb,var(--coral) 13%,var(--paper-deep)) 100%);box-shadow:0 30px 60px color-mix(in srgb,color-mix(in srgb,var(--moss) 18%,black) 35%,transparent);display:flex;flex-direction:column;align-items:center;justify-content:center;color:var(--moss)}
.portrait-slot img{position:absolute;inset:0;width:100%;height:100%;object-fit:cover}
.portrait-mono{font:800 72px/1 var(--en);letter-spacing:.12em;color:color-mix(in srgb,var(--moss) 28%,transparent)}
.portrait-note{margin-top:18px;font-size:13px;line-height:1.8;font-weight:700;text-align:center;color:var(--moss)}
.about-d-portrait figcaption{margin:30px 0 0 92px;font-size:14px;line-height:2.05;color:color-mix(in srgb,var(--coral) 12%,var(--paper))}
.about-d-line{list-style:none;margin:110px 0 0;padding:34px 0 0;display:grid;grid-template-columns:repeat(var(--points,5),1fr);position:relative;opacity:0;transition:opacity 1s .2s}
.about-d-line::before{content:"";position:absolute;left:0;top:0;height:1px;width:100%;background:rgba(255,255,255,.45);transform-origin:left;transform:scaleX(0);transition:transform 1.6s cubic-bezier(.3,.6,.1,1)}
.about-d-line.is-in{opacity:1}
.about-d-line.is-in::before{transform:none}
.about-d-line li{position:relative;padding-right:24px}
.about-d-line li::before{content:"";position:absolute;left:0;top:-40px;width:11px;height:11px;border-radius:50%;background:var(--on-ground);box-shadow:0 0 0 6px color-mix(in srgb,var(--on-ground) 16%,transparent)}
.about-d-line b{display:block;font:800 34px/1 var(--en)}
.about-d-line li:first-child b{font-size:15px;letter-spacing:.22em;padding:11px 0 8px}
.about-d-line span{display:block;margin-top:12px;font-size:13px;line-height:1.75;color:color-mix(in srgb,var(--coral) 12%,var(--paper))}
.about-d-roles{display:grid;grid-template-columns:repeat(3,1fr);gap:16px;margin:56px 0 0;opacity:0;transition:opacity 1s .5s}
.about-d-roles.is-in{opacity:1}
.about-d-roles div{padding:22px 24px;border-radius:18px;background:rgba(255,255,255,.07);border:1px solid rgba(255,255,255,.2)}
.about-d-roles dt{font-size:11px;font-weight:800;letter-spacing:.16em;color:var(--on-ground)}
.about-d-roles dd{margin:8px 0 0;font-size:13px;line-height:1.8;font-weight:700}
@media(max-width:1180px){
  .about-d-inner{padding:100px 48px 90px}
  .about-d-stage{grid-template-columns:1fr}
  .about-d-portrait{margin:-90px 0 0;display:grid;grid-template-columns:1fr minmax(0,340px);gap:40px;align-items:end}
  .about-d-portrait figcaption{order:-1;margin:0 0 8px}
  .about-d-window{padding-bottom:120px}
  .about-d-roles{grid-template-columns:1fr}
}
@media(max-width:760px){
  .about-d-inner{padding:72px 20px 72px}
  .about-d-window{min-height:600px;padding:190px 28px 84px;border-radius:220px 220px 4px 4px}
  .about-d-window::before{inset:10px;border-radius:210px 210px 2px 2px}
  .about-d-window::after{left:-10px;right:10px;top:-10px;bottom:10px;border-radius:220px 220px 4px 4px}
  .about-d-head{top:92px}
  .about-d-quote p{font-size:clamp(28px,8vw,36px)}
  .about-d-name{font-size:28px;margin-top:24px;padding-top:18px}
  .about-d-portrait{margin:-44px 0 0 auto;width:62%;display:block}
  .portrait-slot{border-radius:4px 4px 110px 4px}
  .portrait-mono{font-size:48px}
  .portrait-note{font-size:11px}
  .about-d-portrait figcaption{margin:24px 0 0 -61%;width:161%}
  .about-d-line{grid-template-columns:1fr;margin-top:64px;padding:0 0 0 28px}
  .about-d-line::before{width:1px;height:100%;transform-origin:top;transform:scaleY(0)}
  .about-d-line li{padding:0 0 26px}
  .about-d-line li::before{left:-33px;top:6px}
  .about-d-line b{font-size:26px}
  .about-d-roles{margin-top:28px}
}
@media(prefers-reduced-motion:reduce){
  .about-d [data-reveal],.about-d [data-reveal] *,.about-d-line::before{transition:none!important;transform:none!important;opacity:1!important}
}
.section+.section{margin-top:clamp(220px,42vh,440px)}
.contact{margin-top:clamp(220px,42vh,440px)}
@media(max-width:760px){
  .section+.section{margin-top:clamp(150px,30vh,260px)}
  .contact{margin-top:clamp(150px,30vh,260px)}
}
/* 背景を切り替える節は、画面の高さ以上にする。
   backdrop.js は、節が画面を覆って背景が見えていない間にだけ写真を切り替えるため。
   ヘッダーの分（92px／スマホ72px）だけ、覆っている時間に余裕ができる。
   大きな画面で中身より高くなったときは、中身を縦の中央に置く */
[data-underlay]:not([data-underlay-early]){min-height:100vh;display:flex;flex-direction:column;justify-content:center}
/* 縦に中央寄せするための flex で、子の幅が中身に縮まないようにする（.path-caption の max-width＋auto余白を保つ） */
[data-underlay]:not([data-underlay-early])>*{width:100%}
.site-header{transition:background .4s ease}
.site-header.is-scrolled{background:color-mix(in srgb,var(--ground) 92%,transparent)}
@media(max-width:760px){
  .site-header{margin-bottom:-72px}
}
/* スマホのメニュー（demo.js が .menu-toggle と #navigation の開閉を受け持つ） */
@media(max-width:760px){
  .nav.is-open{display:flex;position:absolute;top:100%;left:0;right:0;flex-direction:column;align-items:stretch;gap:0;padding:8px 20px 20px;background:var(--ground);box-shadow:0 20px 40px color-mix(in srgb,var(--ground-deep) 35%,transparent)}
  .nav.is-open>*{padding:15px 2px;text-align:left;border-bottom:1px solid rgba(255,255,255,.16)}
  .nav.is-open .nav-cta{margin-top:14px;text-align:center;border-bottom:0}
}