:root{
  --material-navy:#071c46;
  --material-blue:#1554d1;
  --material-pale:#eef4fd;
  --material-line:#dce6f3;
  --material-text:#263a55;
  --material-muted:#647289;
  --material-serif:"Noto Serif JP","Yu Mincho","Hiragino Mincho ProN",serif;
  --material-sans:"Noto Sans JP","Hiragino Kaku Gothic ProN","Yu Gothic",sans-serif;
  --material-latin:"Montserrat","Noto Sans JP",sans-serif;
}

.intro-slide.intro-slide--image{
  display:block;
  aspect-ratio:1672/941;
  min-height:0;
  overflow:hidden;
  background:#fff;
}

.intro-slide.intro-slide--image img{
  width:100%;
  height:100%;
  object-fit:contain;
  display:block;
  border:0;
  border-radius:0;
  box-shadow:none;
}

.intro-slide__zoom{
  display:block;
  width:100%;
  height:100%;
  cursor:zoom-in;
}

.intro-slides-zoom-note{
  margin:14px 0 0;
  color:#647289;
  font-family:var(--material-sans);
  font-size:.82rem;
  text-align:center;
  letter-spacing:.03em;
}

/* Portfolio material design contract:
   Noto Serif JP for the narrative title, Noto Sans JP for operational detail,
   Montserrat only for small English metadata. */
.intro-slides{
  padding:88px 0 82px;
  background:
    radial-gradient(circle at 16% 8%,rgba(215,229,251,.58),transparent 32%),
    #f8fafd;
}

.intro-slides-inner{max-width:1240px;}
.intro-slides-head{max-width:1050px;margin:0 auto 40px;}
.intro-slides-eyebrow{
  margin-bottom:14px;
  color:var(--material-blue);
  font-family:var(--material-latin);
  font-size:.76rem;
  font-weight:700;
  letter-spacing:.2em;
}

.intro-slides-title{
  color:var(--material-navy);
  font-family:var(--material-serif);
  font-size:clamp(2rem,2.4vw,2.2rem);
  font-weight:700;
  letter-spacing:.01em;
  line-height:1.55;
  text-wrap:balance;
}

.intro-slides-title-main{
  display:block;
  white-space:nowrap;
}

.intro-slides-title small{
  max-width:860px;
  margin:12px auto 0;
  color:#58687f;
  font-family:var(--material-sans);
  font-size:1rem;
  font-weight:400;
  letter-spacing:.035em;
  line-height:1.85;
}

.intro-slides-stage{
  overflow:hidden;
  border:1px solid #d7e2f0;
  border-radius:18px;
  background:#fff;
  box-shadow:0 20px 54px rgba(7,28,70,.11);
}

.intro-slides-track{align-items:stretch;background:#fff;}

.intro-slide.material-slide{
  display:grid;
  grid-template-columns:108px minmax(0,1fr);
  aspect-ratio:16/9;
  min-height:0;
  overflow:hidden;
  background:#fff;
  color:var(--material-navy);
  font-family:var(--material-sans);
}

.material-slide__rail{
  position:relative;
  display:flex;
  flex-direction:column;
  align-items:center;
  justify-content:flex-start;
  gap:14px;
  padding-top:34px;
  overflow:hidden;
  background:var(--material-navy);
  color:#fff;
}

.material-slide__rail::after{
  content:"";
  position:absolute;
  right:-42px;
  bottom:48px;
  width:112px;
  height:112px;
  border:1px solid rgba(255,255,255,.16);
  border-radius:50%;
}

.material-slide__rail span{
  position:relative;
  z-index:1;
  font-family:var(--material-serif);
  font-size:3.2rem;
  font-weight:700;
  letter-spacing:-.04em;
  line-height:1;
}

.material-slide__rail small{
  position:relative;
  z-index:1;
  color:#a9c9ff;
  font-family:var(--material-latin);
  font-size:.62rem;
  font-weight:700;
  letter-spacing:.16em;
  writing-mode:vertical-rl;
}

.material-slide__body{
  display:flex;
  flex-direction:column;
  min-width:0;
  padding:30px 34px 24px;
  background:
    linear-gradient(rgba(21,84,209,.025) 1px,transparent 1px),
    linear-gradient(90deg,rgba(21,84,209,.025) 1px,transparent 1px),
    #fff;
  background-size:32px 32px;
}

.material-slide__header{
  display:grid;
  grid-template-columns:minmax(0,1.2fr) minmax(250px,.8fr);
  gap:34px;
  align-items:end;
  padding-bottom:20px;
  border-bottom:1px solid var(--material-line);
}

.material-slide__kicker{
  margin:0 0 7px;
  color:var(--material-blue);
  font-family:var(--material-latin);
  font-size:.65rem;
  font-weight:700;
  letter-spacing:.18em;
  line-height:1.5;
}

.material-slide__header h3{
  margin:0;
  color:var(--material-navy);
  font-family:var(--material-serif);
  font-size:clamp(1.65rem,2.35vw,2.15rem);
  font-weight:700;
  letter-spacing:.01em;
  line-height:1.48;
}

.material-slide__header>p{
  margin:0;
  color:var(--material-text);
  font-size:.88rem;
  line-height:1.85;
  letter-spacing:.025em;
}

.material-slide__content{
  display:grid;
  grid-template-columns:minmax(0,1.28fr) minmax(300px,.72fr);
  gap:22px;
  margin-top:20px;
}

.material-work,
.material-ai{
  min-width:0;
}

.material-work h4,
.material-ai h4{
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:16px;
  margin:0 0 11px;
  color:var(--material-navy);
}

.material-work h4 span,
.material-ai h4 span{
  font-size:.9rem;
  font-weight:700;
  letter-spacing:.035em;
}

.material-work h4 small,
.material-ai h4 small{
  color:#7c8da5;
  font-family:var(--material-latin);
  font-size:.57rem;
  font-weight:700;
  letter-spacing:.14em;
}

.material-task-grid{
  display:grid;
  grid-template-columns:repeat(2,minmax(0,1fr));
  gap:10px;
}

.material-task{
  display:grid;
  grid-template-columns:32px minmax(0,1fr);
  gap:10px;
  min-height:82px;
  padding:13px;
  border:1px solid var(--material-line);
  border-radius:9px;
  background:rgba(255,255,255,.92);
}

.material-task>b{
  display:grid;
  place-items:center;
  width:30px;
  height:30px;
  border-radius:50%;
  background:var(--material-navy);
  color:#fff;
  font-family:var(--material-latin);
  font-size:.65rem;
  line-height:1;
}

.material-task strong{
  display:block;
  color:var(--material-navy);
  font-size:.85rem;
  line-height:1.55;
}

.material-task p{
  margin:4px 0 0;
  color:#52627a;
  font-size:.75rem;
  line-height:1.65;
}

.material-ai{
  padding:14px 15px;
  border:1px solid #c9d9f1;
  border-radius:10px;
  background:linear-gradient(145deg,#f5f8fe,#edf4fd);
}

.material-ai ul{
  display:grid;
  gap:0;
  margin:0;
  padding:0;
  list-style:none;
}

.material-ai li{
  display:grid;
  grid-template-columns:28px minmax(0,1fr);
  gap:9px;
  align-items:center;
  min-height:38px;
  padding:6px 0;
  border-bottom:1px solid rgba(21,84,209,.12);
}

.material-ai li b{
  color:var(--material-blue);
  font-family:var(--material-latin);
  font-size:.62rem;
}

.material-ai li span{
  color:#253b59;
  font-size:.75rem;
  font-weight:600;
  line-height:1.6;
}

.material-human{
  margin-top:10px;
  padding:10px 12px;
  border-left:3px solid var(--material-blue);
  background:#fff;
}

.material-human small{
  display:block;
  margin-bottom:3px;
  color:var(--material-blue);
  font-size:.59rem;
  font-weight:700;
  letter-spacing:.06em;
}

.material-human strong{
  display:block;
  color:var(--material-navy);
  font-size:.73rem;
  line-height:1.6;
}

.material-output{
  display:flex;
  align-items:center;
  gap:9px;
  margin-top:auto;
  padding-top:17px;
}

.material-output strong{
  margin-right:4px;
  color:var(--material-navy);
  font-size:.72rem;
}

.material-output span{
  display:inline-flex;
  align-items:center;
  min-height:30px;
  padding:0 10px;
  border:1px solid var(--material-line);
  border-radius:5px;
  background:#fff;
  color:#42546d;
  font-size:.68rem;
  font-weight:600;
}

.intro-slides-nav:focus-visible,
.intro-slides-dot:focus-visible{
  outline:3px solid rgba(21,84,209,.45);
  outline-offset:3px;
}

.intro-slides-dots{gap:0;margin-top:16px;}
.intro-slides-dot{
  position:relative;
  width:44px;
  height:44px;
  border-radius:50%;
  background:transparent;
}
.intro-slides-dot::after{
  content:"";
  position:absolute;
  inset:50% auto auto 50%;
  width:8px;
  height:8px;
  border-radius:50%;
  background:#cbd5e3;
  transform:translate(-50%,-50%);
  transition:background .2s,transform .2s;
}
.intro-slides-dot.is-active{background:transparent;transform:none;}
.intro-slides-dot.is-active::after{
  background:var(--material-blue);
  transform:translate(-50%,-50%) scale(1.35);
}

.intro-slides-cta{margin-top:12px;}
.intro-slides-cta a{
  min-height:48px;
  padding:0 25px;
  border-radius:6px;
  background:var(--material-navy);
  font-size:.84rem;
  font-weight:700;
  box-shadow:none;
}
.intro-slides-cta a:hover{box-shadow:0 10px 24px rgba(7,28,70,.18);}

@media(max-width:1024px){
  .intro-slides{padding:80px 0 76px;}
  .intro-slide.material-slide{grid-template-columns:88px minmax(0,1fr);aspect-ratio:auto;min-height:585px;}
  .material-slide__rail span{font-size:2.8rem;}
  .material-slide__body{padding:27px 28px 22px;}
  .material-slide__header{grid-template-columns:minmax(0,1.1fr) minmax(230px,.9fr);gap:25px;}
  .material-slide__header h3{font-size:1.75rem;}
  .material-slide__content{grid-template-columns:minmax(0,1.15fr) minmax(285px,.85fr);gap:16px;}
  .material-task{padding:11px;}
}

@media(max-width:820px){
  .intro-slides{padding:64px 0 60px;}
  .intro-slides-inner{padding:0 20px;}
  .intro-slides-head{margin-bottom:28px;text-align:left;}
  .intro-slides-eyebrow{font-size:.7rem;}
  .intro-slides-title{font-size:1.8rem;line-height:1.5;}
  .intro-slides-title-main{white-space:normal;}
  .intro-slides-title small{margin-top:10px;font-size:.94rem;line-height:1.8;}
  .intro-slides-stage{border-radius:14px;}
  .intro-slide.material-slide{display:block;min-height:0;}
  .material-slide__rail{
    flex-direction:row;
    justify-content:space-between;
    height:72px;
    padding:0 22px;
  }
  .material-slide__rail::after{right:42%;bottom:-62px;}
  .material-slide__rail span{font-size:2.25rem;}
  .material-slide__rail small{font-size:.62rem;writing-mode:horizontal-tb;}
  .material-slide__body{padding:24px 20px 26px;background-size:24px 24px;}
  .material-slide__header{grid-template-columns:1fr;gap:13px;padding-bottom:20px;}
  .material-slide__header h3{font-size:1.7rem;line-height:1.5;}
  .material-slide__header>p{font-size:.93rem;line-height:1.85;}
  .material-slide__content{grid-template-columns:1fr;gap:20px;margin-top:22px;}
  .material-work h4 span,.material-ai h4 span{font-size:.94rem;}
  .material-task-grid{grid-template-columns:1fr;gap:10px;}
  .material-task{grid-template-columns:36px minmax(0,1fr);min-height:0;padding:14px;}
  .material-task>b{width:34px;height:34px;font-size:.7rem;}
  .material-task strong{font-size:.91rem;line-height:1.6;}
  .material-task p{font-size:.82rem;line-height:1.75;}
  .material-ai{padding:16px;}
  .material-ai li{grid-template-columns:30px minmax(0,1fr);min-height:50px;padding:8px 0;}
  .material-ai li span{font-size:.84rem;line-height:1.7;}
  .material-human{margin-top:12px;padding:13px 14px;}
  .material-human small{font-size:.67rem;}
  .material-human strong{font-size:.82rem;line-height:1.7;}
  .material-output{flex-wrap:wrap;margin-top:20px;padding-top:18px;border-top:1px solid var(--material-line);}
  .material-output strong{width:100%;font-size:.8rem;}
  .material-output span{min-height:34px;font-size:.75rem;}
  .intro-slides-nav{display:none;}
  .intro-slides-dots{margin-top:10px;}
  .intro-slides-cta{margin-top:5px;}
}

@media(max-width:390px){
  .intro-slides-inner{padding:0 16px;}
  .intro-slides-title{font-size:1.65rem;}
  .material-slide__body{padding:22px 16px 24px;}
  .material-slide__header h3{font-size:1.56rem;}
}

@media(prefers-reduced-motion:reduce){
  .intro-slides-track{scroll-behavior:auto;}
  .intro-slides-dot::after,
  .intro-slides-nav,
  .intro-slides-cta a{transition:none!important;}
}