:root{
  --paper:#F5F0E8;
  --paper-2:#ECE5DA;
  --ivory:#FCFAF6;
  --ink:#183847;
  --navy:#143D59;
  --navy-deep:#0B2636;
  --turquoise:#2EC4B6;
  --sand:#CDBA9D;
  --warm:#D7C5AB;
  --muted:#6D777A;
  --white:#FFFFFF;
  --line:rgba(20,61,89,.13);
  --line-light:rgba(255,255,255,.15);
  --shadow:0 30px 90px rgba(29,49,58,.14);
  --radius:30px;
  --max:1280px;
  --pad:clamp(20px,5vw,76px);
  --ease:cubic-bezier(.2,.72,.2,1);
}
*{box-sizing:border-box}
html{scroll-behavior:smooth;background:var(--paper)}
body{
  margin:0;
  overflow-x:hidden;
  color:var(--ink);
  background:var(--paper);
  font-family:"Aptos","Segoe UI",Inter,system-ui,-apple-system,sans-serif;
}
body::after{
  content:"";
  position:fixed;
  inset:0;
  z-index:300;
  pointer-events:none;
  opacity:.018;
  background-image:url("data:image/svg+xml,%3Csvg viewBox='0 0 180 180' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='.72' numOctaves='3' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)' opacity='.45'/%3E%3C/svg%3E");
}
img{display:block;max-width:100%}
button,a{font:inherit}
a{color:inherit}
.serif{font-family:"Iowan Old Style","Palatino Linotype",Palatino,Georgia,serif;letter-spacing:-.038em}
.accent{color:var(--turquoise)}
.eyebrow{
  margin:0 0 1rem;
  color:var(--turquoise);
  font-size:.75rem;
  font-weight:850;
  letter-spacing:.18em;
  text-transform:uppercase;
}
.huge{
  margin:0;
  max-width:1180px;
  color:var(--navy);
  font-size:clamp(3.4rem,8vw,9rem);
  font-weight:520;
  line-height:.88;
  letter-spacing:-.078em;
}
.title{
  margin:0;
  max-width:1080px;
  color:var(--navy);
  font-size:clamp(2.55rem,5.7vw,6.2rem);
  font-weight:520;
  line-height:.96;
  letter-spacing:-.062em;
}
.subtitle{
  margin:1.45rem 0 0;
  max-width:820px;
  color:var(--muted);
  font-size:clamp(1.05rem,1.55vw,1.45rem);
  line-height:1.62;
}
.dark .huge,.dark .title{color:var(--white)}
.dark .subtitle{color:rgba(255,255,255,.72)}
.section{
  position:relative;
  min-height:100svh;
  display:flex;
  align-items:center;
  overflow:hidden;
  isolation:isolate;
  padding:clamp(100px,10vw,160px) var(--pad);
  border-top:1px solid var(--line);
  background:
    radial-gradient(circle at 85% 10%,rgba(46,196,182,.055),transparent 28rem),
    linear-gradient(180deg,var(--ivory),var(--paper));
}
.section.dark{
  color:var(--white);
  border-color:var(--line-light);
  background:
    radial-gradient(circle at 80% 20%,rgba(46,196,182,.14),transparent 31rem),
    linear-gradient(135deg,var(--navy-deep),var(--navy));
}
.section.sand{
  background:
    radial-gradient(circle at 16% 18%,rgba(255,255,255,.7),transparent 30rem),
    linear-gradient(135deg,#EFE6D8,#DCCCB7);
}
.section-inner{position:relative;z-index:2;width:min(100%,var(--max));margin-inline:auto}
.narrow{max-width:940px}
.center{text-align:center;margin-inline:auto}
[data-reveal]{
  opacity:0;
  transform:translateY(34px);
  transition:opacity .95s var(--ease),transform .95s var(--ease);
}
[data-reveal="left"]{transform:translateX(-44px)}
[data-reveal="right"]{transform:translateX(44px)}
.in-view [data-reveal]{opacity:1;transform:none}
.delay-1{transition-delay:.12s}.delay-2{transition-delay:.25s}.delay-3{transition-delay:.4s}.delay-4{transition-delay:.55s}
.progress{position:fixed;top:0;left:0;z-index:260;width:100%;height:3px;background:rgba(20,61,89,.08)}
.progress span{display:block;width:0;height:100%;background:var(--turquoise)}
.slide-index{
  position:absolute;
  top:34px;
  left:var(--pad);
  z-index:3;
  color:rgba(20,61,89,.46);
  font-size:.72rem;
  font-weight:800;
  letter-spacing:.16em;
}
.dark .slide-index{color:rgba(255,255,255,.45)}
.split{display:grid;grid-template-columns:1fr 1fr;gap:clamp(2.5rem,7vw,7rem);align-items:center}
.image-frame{
  position:relative;
  min-height:clamp(430px,55vw,720px);
  overflow:hidden;
  border-radius:var(--radius);
  background:#D9E0DF;
  box-shadow:var(--shadow);
}
.image-frame img{position:absolute;inset:0;width:100%;height:100%;object-fit:cover;transform:scale(1.025);transition:transform 7s ease}
.in-view .image-frame img{transform:scale(1)}
.image-frame::after{content:"";position:absolute;inset:0;border:1px solid rgba(255,255,255,.45);border-radius:inherit;pointer-events:none}
.manifesto{display:grid;gap:.95rem;margin-top:clamp(2.7rem,5vw,5rem)}
.manifesto p{margin:0;color:var(--navy);font-size:clamp(1.55rem,2.6vw,3rem);line-height:1.08;letter-spacing:-.04em}
.keyword{color:inherit;transition:color .8s var(--ease)}
.in-view .keyword{color:var(--turquoise);transition-delay:1.1s}
.quote{
  margin:2rem 0 0;
  padding-left:1.3rem;
  border-left:3px solid var(--turquoise);
  font-family:"Iowan Old Style",Georgia,serif;
  font-size:clamp(1.45rem,2.4vw,2.55rem);
  line-height:1.25;
  letter-spacing:-.03em;
}
.card{
  border:1px solid var(--line);
  border-radius:24px;
  background:rgba(255,255,255,.5);
  backdrop-filter:blur(10px);
}
.dark .card{border-color:rgba(255,255,255,.13);background:rgba(255,255,255,.055)}

/* Landing */
#intro{
  position:fixed;inset:0;z-index:240;min-height:100svh;
  display:grid;place-items:center;
  background:
    radial-gradient(circle at 50% 24%,rgba(46,196,182,.11),transparent 31rem),
    linear-gradient(180deg,#FBF8F2,#EFE6D8);
  transition:opacity 1s var(--ease),visibility 1s;
}
body.started #intro{opacity:0;visibility:hidden;pointer-events:none}
.intro-grid{
  width:min(100%,1320px);min-height:100svh;
  padding:clamp(26px,5vw,72px);
  display:grid;grid-template-rows:auto 1fr auto;gap:2rem;
}
.brand-lockup{
  display:flex;
  justify-content:center;
  align-items:center;
  gap:1rem;
  color:var(--navy);
  font-size:.76rem;
  font-weight:850;
  letter-spacing:.19em;
  text-transform:uppercase
}
.brand-lockup span{opacity:.45;font-size:1.05rem}
.brand-lockup strong{white-space:nowrap}
.niu-logo-card{
  overflow:hidden;
  border:1px solid rgba(20,61,89,.09);
  border-radius:18px;
  background:#F7F3EE;
  box-shadow:0 14px 38px rgba(20,61,89,.08)
}
.niu-logo-card img{width:100%;height:100%;object-fit:contain}
.intro-niu-logo{width:clamp(118px,15vw,182px);aspect-ratio:1.44/1}
.section-niu-logo{width:min(100%,290px);aspect-ratio:1.44/1;margin-bottom:1.4rem}
.niu-name{margin-top:.4rem}
.intro-center{display:grid;place-items:center;text-align:center}
.intro-title{
  margin:0;color:var(--navy);
  font-size:clamp(3.8rem,9.7vw,10.8rem);
  font-weight:520;line-height:.82;letter-spacing:-.085em;
  animation:introReveal 1.65s .15s var(--ease) both;
}
.intro-title small{
  display:block;margin-top:1.65rem;color:#7E807C;
  font-family:"Aptos","Segoe UI",sans-serif;font-size:.8rem;
  font-weight:850;letter-spacing:.31em;text-transform:uppercase
}
@keyframes introReveal{from{opacity:0;transform:translateY(38px);filter:blur(10px)}to{opacity:1;transform:none;filter:none}}
.start{text-align:center}
.start button{
  min-height:52px;padding:.8rem 1.6rem;color:var(--navy);background:transparent;
  border:1px solid var(--turquoise);border-radius:999px;cursor:pointer;
  font-size:.82rem;font-weight:850;letter-spacing:.1em;text-transform:uppercase;transition:.3s var(--ease)
}
.start button:hover,.start button:focus-visible{color:var(--white);background:var(--turquoise);outline:none;transform:translateY(-2px)}
.start p{margin:.8rem 0 0;color:#8C8D89;font-size:.78rem}

/* Fixed tools */
.utility-nav{
  position:fixed;top:18px;right:18px;z-index:210;
  display:flex;gap:.55rem;opacity:0;transform:translateY(-10px);pointer-events:none;
  transition:.45s var(--ease)
}
body.started .utility-nav{opacity:1;transform:none;pointer-events:auto}
.utility-btn,.explore-toggle{
  min-height:42px;padding:.65rem .9rem;border-radius:999px;cursor:pointer;
  font-size:.74rem;font-weight:800;letter-spacing:.035em;transition:.25s var(--ease);
  backdrop-filter:blur(16px)
}
.utility-btn.clinical{
  color:var(--navy);background:rgba(252,250,246,.86);border:1px solid rgba(20,61,89,.22)
}
.utility-btn.value{
  color:var(--white);background:rgba(20,61,89,.9);border:1px solid rgba(255,255,255,.12)
}
.utility-btn:hover{transform:translateY(-2px);border-color:var(--turquoise)}
.explore-toggle{display:none;color:var(--white);background:rgba(20,61,89,.92);border:1px solid rgba(255,255,255,.14)}
.mobile-explore{
  display:none;position:fixed;top:68px;right:18px;z-index:209;width:min(310px,calc(100vw - 36px));
  padding:.55rem;border:1px solid rgba(255,255,255,.13);border-radius:20px;background:rgba(11,38,54,.95);
  box-shadow:0 20px 60px rgba(0,0,0,.22);backdrop-filter:blur(18px)
}
.mobile-explore.open{display:grid;gap:.45rem}
.mobile-explore button{width:100%;text-align:left}
.audio-toggle{
  position:fixed;right:18px;bottom:18px;z-index:210;
  display:flex;align-items:center;gap:.6rem;padding:.7rem .95rem;
  color:var(--white);border:1px solid rgba(255,255,255,.14);border-radius:999px;
  background:rgba(11,38,54,.86);backdrop-filter:blur(16px);cursor:pointer;
  opacity:0;transform:translateY(10px);pointer-events:none;transition:.45s var(--ease)
}
body.started .audio-toggle{opacity:1;transform:none;pointer-events:auto}
.bars{height:14px;display:flex;gap:2px;align-items:end}
.bars i{width:2px;height:5px;background:var(--turquoise);animation:bars 1s infinite alternate}
.bars i:nth-child(2){height:12px;animation-delay:.2s}.bars i:nth-child(3){height:8px;animation-delay:.38s}
body.muted .bars i{animation:none;height:2px}
@keyframes bars{to{height:14px}}

/* Modal pages */
.modal{
  position:fixed;inset:0;z-index:280;display:none;background:rgba(8,25,34,.76);backdrop-filter:blur(10px)
}
.modal.open{display:block;animation:modalIn .35s var(--ease)}
@keyframes modalIn{from{opacity:0}to{opacity:1}}
.modal-shell{position:absolute;inset:clamp(10px,2vw,24px);overflow:hidden;border-radius:26px;background:var(--ivory);box-shadow:0 40px 120px rgba(0,0,0,.4)}
.modal iframe{width:100%;height:100%;border:0;background:var(--ivory)}
.modal-close{
  position:absolute;top:18px;right:18px;z-index:4;width:46px;height:46px;
  display:grid;place-items:center;color:var(--navy);background:rgba(252,250,246,.92);
  border:1px solid rgba(20,61,89,.15);border-radius:50%;font-size:1.25rem;cursor:pointer;box-shadow:0 8px 28px rgba(0,0,0,.12)
}
body.modal-open{overflow:hidden}

/* Individual slides */
#s02{align-items:flex-start;padding-top:clamp(110px,11vw,165px);background:var(--ivory)}
.hospital-question{margin-bottom:clamp(2.8rem,5vw,4.5rem)}
.hospital-wide{position:relative;width:min(100%,1130px);aspect-ratio:16/8.6;margin-inline:auto;overflow:hidden;border-radius:30px;box-shadow:var(--shadow)}
.hospital-wide img{width:100%;height:100%;object-fit:cover;transform:scale(1.025);transition:transform 7s ease}
.in-view .hospital-wide img{transform:scale(1)}
.two-lines{display:grid;gap:1.2rem}
.visual-title{max-width:1190px;margin-bottom:clamp(2.8rem,5vw,4.8rem)}
.visual-grid{display:grid;grid-template-columns:repeat(12,minmax(0,1fr));gap:1rem}
.visual-card{position:relative;min-height:320px;overflow:hidden;border-radius:24px;background:#102E40}
.visual-card:nth-child(1),.visual-card:nth-child(2){grid-column:span 6;min-height:410px}
.visual-card:nth-child(3),.visual-card:nth-child(4){grid-column:span 6;min-height:345px}
.visual-card img{position:absolute;inset:0;width:100%;height:100%;object-fit:cover;transition:transform 1.2s var(--ease)}
.visual-card:hover img{transform:scale(1.035)}
.visual-card::after{content:"";position:absolute;inset:0;background:linear-gradient(180deg,transparent 40%,rgba(5,23,34,.78))}
.visual-card strong{position:absolute;z-index:2;left:1.35rem;bottom:1.25rem;color:var(--white);font-size:clamp(1.3rem,2vw,2rem);letter-spacing:-.04em}
.sound-statement{display:grid;gap:.85rem}
.sound-statement .huge{font-size:clamp(3.35rem,7.4vw,8rem)}
.transform-section{
  background:
    radial-gradient(circle at 50% 50%,rgba(46,196,182,.2),transparent 31rem),
    linear-gradient(155deg,#D8D0C4 0%,#143D59 70%,#0B2636 100%);
}
.transform-section::before,.transform-section::after{
  content:"";position:absolute;aspect-ratio:1;border:1px solid rgba(255,255,255,.13);border-radius:50%;animation:orbit 18s linear infinite
}
.transform-section::before{width:min(90vw,930px)}.transform-section::after{width:min(64vw,640px);animation-duration:12s;animation-direction:reverse}
@keyframes orbit{to{transform:rotate(360deg)}}
.soundcare-word{font-size:clamp(4.2rem,12vw,13rem);letter-spacing:-.09em}
.zpai-grid{display:grid;grid-template-columns:.95fr 1.05fr;gap:clamp(2.4rem,7vw,7rem);align-items:center}
.zpai-visual{position:relative;min-height:590px;overflow:hidden;border-radius:28px;background:var(--navy-deep);box-shadow:var(--shadow)}
.zpai-visual img{position:absolute;inset:0;width:100%;height:100%;object-fit:cover;opacity:.52;filter:saturate(.72) contrast(1.05)}
.zpai-visual::after{content:"";position:absolute;inset:0;background:linear-gradient(145deg,rgba(11,38,54,.18),rgba(11,38,54,.9))}
.zpai-logo-panel{
  position:absolute;
  z-index:2;
  left:clamp(24px,4vw,54px);
  right:clamp(24px,4vw,54px);
  bottom:clamp(24px,4vw,54px);
  min-height:150px;
  display:grid;
  place-items:center;
  padding:clamp(24px,4vw,44px);
  border:1px solid rgba(255,255,255,.13);
  border-radius:24px;
  background:rgba(5,15,20,.88);
  box-shadow:0 24px 60px rgba(0,0,0,.25);
  backdrop-filter:blur(12px)
}
.zpai-logo-panel img{
  width:min(100%,520px);
  max-height:120px;
  object-fit:contain
}
.about-grid{display:grid;grid-template-columns:.82fr 1.18fr;gap:clamp(2.5rem,7vw,7rem);align-items:center}
.portrait{min-height:720px}
.about-copy h2{margin:0;color:var(--navy);font-family:"Iowan Old Style",Georgia,serif;font-size:clamp(3.2rem,6vw,6.7rem);line-height:.9;letter-spacing:-.065em}
.about-copy p{color:var(--muted);font-size:clamp(1rem,1.3vw,1.2rem);line-height:1.68}
.definition{display:grid;grid-template-columns:.8fr 1.2fr;gap:clamp(2.4rem,7vw,7rem);align-items:start}
.definition-copy{font-size:clamp(1.08rem,1.45vw,1.35rem);line-height:1.7;color:rgba(255,255,255,.76)}
.definition-list{display:grid;grid-template-columns:1fr 1fr;gap:.75rem;margin-top:1.7rem}
.definition-list span{padding:1rem;border:1px solid rgba(255,255,255,.13);border-radius:16px;background:rgba(255,255,255,.055)}
.spaces-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:1rem;margin-top:clamp(2.5rem,5vw,4.5rem)}
.space-card{position:relative;padding:1.5rem 1.5rem 1.7rem;overflow:hidden;border:1px solid rgba(255,255,255,.13);border-radius:24px;background:rgba(255,255,255,.06)}
.space-card::before{content:"";position:absolute;top:0;left:0;width:86px;height:3px;background:var(--turquoise)}
.space-card h3{margin:0;color:var(--white);font-size:clamp(1.45rem,2vw,2rem);letter-spacing:-.04em}
.space-card p{margin:.75rem 0 0;color:rgba(255,255,255,.72);line-height:1.58}
.benefit-title{margin-bottom:clamp(2.5rem,5vw,4.4rem)}
.benefit-title strong{font-family:"Aptos","Segoe UI",sans-serif;font-weight:900;letter-spacing:-.045em}
.benefit-grid{display:grid;grid-template-columns:repeat(12,minmax(0,1fr));gap:1rem}
.benefit{
  position:relative;min-height:240px;padding:1.45rem;overflow:hidden;border:1px solid var(--line);border-radius:24px;
  background:linear-gradient(145deg,rgba(255,255,255,.88),rgba(239,230,216,.68));box-shadow:0 15px 45px rgba(20,61,89,.07)
}
.benefit:nth-child(1),.benefit:nth-child(4){grid-column:span 7}
.benefit:nth-child(2),.benefit:nth-child(3){grid-column:span 5}
.benefit::after{content:"";position:absolute;width:150px;height:150px;right:-70px;bottom:-75px;border-radius:50%;border:1px solid rgba(46,196,182,.32)}
.benefit span{color:var(--turquoise);font-size:.72rem;font-weight:850;letter-spacing:.16em}
.benefit h3{margin:2.3rem 0 0;color:var(--navy);font-family:"Iowan Old Style",Georgia,serif;font-size:clamp(1.45rem,2.3vw,2.5rem);font-weight:500;line-height:1.12;letter-spacing:-.04em}
.dark .benefit{border-color:rgba(255,255,255,.12);background:linear-gradient(145deg,rgba(255,255,255,.08),rgba(255,255,255,.035));box-shadow:none}
.dark .benefit h3{color:var(--white)}
.closing-tight{display:grid;gap:.45rem}
.final-actions{display:flex;justify-content:center;flex-wrap:wrap;gap:.75rem;margin-top:2rem}
.final-actions button{min-height:48px;padding:.8rem 1.15rem;border-radius:999px;cursor:pointer;font-weight:800}
.final-actions .clinical{color:var(--navy);background:var(--ivory);border:1px solid var(--turquoise)}
.final-actions .value{color:var(--white);background:var(--navy);border:1px solid rgba(255,255,255,.18)}
.contact-links{display:flex;justify-content:center;flex-wrap:wrap;gap:.8rem;margin-top:2.1rem}
.contact-links a{text-decoration:none;padding:.7rem 1rem;border:1px solid rgba(255,255,255,.14);border-radius:999px;color:rgba(255,255,255,.78)}
@media(max-width:940px){
  .section{min-height:auto;padding-top:110px;padding-bottom:110px}
  #s01,#s02,#s03,#s06,#s07,#s08,#s17,#s18,#s21,#s22{min-height:100svh}
  .split,.zpai-grid,.about-grid,.definition{grid-template-columns:1fr}
  .portrait{min-height:600px}
  .definition-list{grid-template-columns:1fr 1fr}
}
@media(max-width:720px){
  .utility-nav .utility-btn{display:none}.explore-toggle{display:block}
  .visual-card:nth-child(n),.benefit:nth-child(n){grid-column:span 12}
  .visual-card:nth-child(n){min-height:300px}
  .spaces-grid,.definition-list{grid-template-columns:1fr}
  .image-frame,.portrait{min-height:470px}
  .modal-shell{inset:0;border-radius:0}.modal-close{top:12px;right:12px}
}
@media(prefers-reduced-motion:reduce){
  html{scroll-behavior:auto}
  *,*::before,*::after{animation:none!important;transition-duration:.01ms!important}
}

.portrait img{object-position:center top}
@media(max-width:720px){
  .brand-lockup{gap:.65rem;letter-spacing:.11em}
  .intro-niu-logo{width:112px;border-radius:14px}
  .brand-lockup strong{font-size:.66rem}
  .section-niu-logo{width:220px}
  .zpai-logo-panel{min-height:115px;padding:22px}
}