:root{
  --brand:#173D31;
  --text:#2A2F2B;
  --muted:#5C6961;
  --bg:#F3EEE7;
  --surface:#FFFCFA;
  --soft:#EBE6DC;
  --border:#D9D6CE;
  --accent:#846548;
  --on-brand:#F3EEE7;
  --serif:"Noto Serif SC","Songti SC","Source Han Serif SC","STSong",serif;
  --sans:-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Hiragino Sans GB","Microsoft YaHei","Noto Sans CJK SC",sans-serif;
  --ease:cubic-bezier(.19,1,.22,1);
  --pad-inline:clamp(20px,5vw,64px);
  --sec-pad:clamp(64px,9vw,128px);
  --max:1280px;
}
*,*::before,*::after{box-sizing:border-box}
html{scroll-behavior:smooth;scroll-padding-top:96px}
body{
  margin:0;
  background:var(--bg);
  color:var(--text);
  font-family:var(--sans);
  font-size:17px;
  line-height:1.75;
  font-variant-numeric:tabular-nums;
  -webkit-text-size-adjust:100%;
}
img{max-width:100%;display:block}
a{color:inherit;text-decoration:none}
button,input,select,textarea{font:inherit;color:inherit}
.skip{
  position:absolute;left:-9999px;top:0;z-index:200;
  background:var(--brand);color:#fff;padding:10px 16px;
}
.skip:focus{left:8px;top:8px}
:focus-visible{outline:2px solid var(--brand);outline-offset:3px}

/* preview banner */
.banner{
  position:relative;z-index:60;
  background:var(--brand);color:var(--on-brand);
  font-size:13px;letter-spacing:.06em;line-height:1.5;
  text-align:center;padding:8px var(--pad-inline);
}

/* container */
.container{
  width:100%;
  max-width:var(--max);
  margin:0 auto;
  padding-inline:var(--pad-inline);
}

/* transparent nav → solid on scroll */
.site-header{
  position:sticky;top:0;z-index:50;
  background:transparent;
  border-bottom:1px solid transparent;
  transition:background .4s var(--ease),border-color .4s var(--ease),backdrop-filter .4s;
}
.site-header.is-solid{
  background:rgba(243,238,231,.96);
  border-bottom-color:var(--border);
  backdrop-filter:saturate(140%) blur(8px);
  -webkit-backdrop-filter:saturate(140%) blur(8px);
}
.site-header .bar{
  display:flex;align-items:center;justify-content:space-between;
  gap:24px;min-height:72px;
}
.brand{
  font-family:var(--serif);font-weight:400;font-size:18px;
  letter-spacing:.12em;color:var(--brand);
  white-space:nowrap;
}
.nav-desktop{display:flex;align-items:center;gap:8px}
.nav-desktop ul{
  list-style:none;margin:0;padding:0;
  display:flex;align-items:center;gap:4px;
}
.nav-desktop a{
  display:inline-flex;align-items:center;min-height:44px;
  padding:0 14px;font-size:14px;letter-spacing:.06em;
  color:var(--text);opacity:.7;transition:opacity .3s;
}
.nav-desktop a:hover,
.nav-desktop a.is-active,
.nav-desktop a[aria-current="true"]{opacity:1}
.btn{
  display:inline-flex;align-items:center;justify-content:center;
  min-height:44px;padding:0 22px;
  border:1px solid var(--brand);
  background:var(--brand);color:var(--on-brand);
  font-size:14px;letter-spacing:.08em;cursor:pointer;
  transition:background .4s var(--ease),color .4s var(--ease),border-color .4s;
}
.btn:hover{background:transparent;color:var(--brand)}
.btn.outline{
  background:transparent;color:var(--brand);
}
.btn.outline:hover{background:var(--brand);color:var(--on-brand)}
.btn.ghost{
  background:transparent;color:var(--brand);border-color:var(--border);
}
.btn.ghost:hover{border-color:var(--brand);background:var(--brand);color:var(--on-brand)}
.btn.sm{min-height:40px;padding:0 16px;font-size:13px}
.btn.on-dark{
  border-color:var(--on-brand);background:transparent;color:var(--on-brand);
}
.btn.on-dark:hover{background:var(--on-brand);color:var(--brand)}

.menu-toggle{
  display:none;align-items:center;justify-content:center;
  width:44px;height:44px;border:1px solid var(--border);
  background:transparent;cursor:pointer;padding:0;
}
.menu-toggle span,
.menu-toggle span::before,
.menu-toggle span::after{
  display:block;width:18px;height:1px;background:var(--brand);
  position:relative;transition:transform .3s,opacity .3s;
}
.menu-toggle span::before,
.menu-toggle span::after{content:"";position:absolute;left:0}
.menu-toggle span::before{top:-6px}
.menu-toggle span::after{top:6px}
body.menu-open .menu-toggle span{background:transparent}
body.menu-open .menu-toggle span::before{top:0;transform:rotate(45deg)}
body.menu-open .menu-toggle span::after{top:0;transform:rotate(-45deg)}

/* mobile fullscreen overlay */
.nav-mobile{
  display:none;position:fixed;inset:0;z-index:55;
  background:var(--bg);padding:96px var(--pad-inline) 48px;
  flex-direction:column;gap:8px;
}
body.menu-open .nav-mobile{display:flex}
.nav-mobile a{
  display:flex;align-items:center;min-height:56px;
  font-family:var(--serif);font-size:28px;font-weight:300;
  letter-spacing:.08em;border-bottom:1px solid var(--border);
  opacity:.7;transition:opacity .3s;
}
.nav-mobile a:hover{opacity:1}
.nav-mobile .btn{margin-top:24px;align-self:flex-start}

/* typography */
.eyebrow{
  margin:0 0 16px;
  font-family:var(--sans);font-size:.75rem;font-weight:500;
  letter-spacing:.24em;text-transform:uppercase;color:var(--muted);
}
h1,h2,h3,.serif{font-family:var(--serif);font-weight:300;color:var(--brand);margin:0}
h1{
  font-size:clamp(2rem,1.2rem + 3vw,3.75rem);
  letter-spacing:.04em;line-height:1.2;font-weight:300;
}
h2{
  font-size:clamp(1.75rem,1.1rem + 2vw,2.75rem);
  letter-spacing:.04em;line-height:1.25;font-weight:300;
}
h3{
  font-size:clamp(1.15rem,1rem + .5vw,1.35rem);
  letter-spacing:.03em;line-height:1.4;font-weight:400;
}
.lead{margin:16px 0 0;color:var(--muted);font-size:17px;max-width:42ch;line-height:1.7}
.sec-pad{padding-block:var(--sec-pad)}
.sec-head{max-width:720px;margin-bottom:clamp(40px,6vw,72px)}
.sec-head p{margin:16px 0 0;color:var(--muted);font-size:16px}

/* reveal */
.reveal{
  opacity:0;transform:translateY(28px);
  transition:opacity .8s var(--ease),transform .8s var(--ease);
}
.reveal.is-in{opacity:1;transform:none}

/* media frame with fallback gradient */
.media{
  position:relative;overflow:hidden;
  background:
    linear-gradient(160deg,rgba(23,61,49,.55) 0%,rgba(243,238,231,.35) 55%,rgba(23,61,49,.75) 100%),
    linear-gradient(180deg,#c9c2b4 0%,#8a9a88 50%,#173D31 100%);
}
.media img{
  width:100%;height:100%;object-fit:cover;
  transition:transform .6s var(--ease);
}
.media:hover img{transform:scale(1.04)}
.ph-tag{
  position:absolute;right:12px;top:12px;z-index:2;
  background:rgba(243,238,231,.92);color:var(--text);
  border:1px solid var(--border);
  font-size:11px;letter-spacing:.06em;line-height:1.4;
  padding:5px 10px;pointer-events:none;
}
.ratio-169{aspect-ratio:16/9}
.ratio-45{aspect-ratio:4/5}
.ratio-32{aspect-ratio:3/2}
.ratio-43{aspect-ratio:4/3}

/* ========== 1 HERO ========== */
#hero{
  position:relative;
  min-height:clamp(560px,88svh,820px);
  display:flex;align-items:flex-end;
  color:var(--on-brand);
  overflow:hidden;
}
.hero-bg{
  position:absolute;inset:0;z-index:0;
  background:
    linear-gradient(180deg,rgba(23,61,49,.25) 0%,rgba(23,61,49,.55) 45%,rgba(23,61,49,.88) 100%),
    linear-gradient(135deg,#2a4a3c 0%,#173D31 50%,#0f241c 100%);
}
.hero-bg img{
  width:100%;height:100%;object-fit:cover;
  opacity:.85;
}
.hero-bg::after{
  content:"";position:absolute;inset:0;
  background:linear-gradient(180deg,rgba(23,61,49,.15) 0%,rgba(23,61,49,.45) 40%,rgba(23,61,49,.92) 100%);
  pointer-events:none;
}
.hero-content{
  position:relative;z-index:1;width:100%;
  padding-block:clamp(48px,8vw,96px);
}
.hero-content .inner{max-width:640px}
.hero-content .eyebrow{color:rgba(243,238,231,.75)}
.hero-content h1{color:#fff;text-shadow:0 1px 24px rgba(0,0,0,.25)}
.hero-content .lead{color:rgba(243,238,231,.85);max-width:36ch}
.hero-cta{display:flex;flex-wrap:wrap;gap:12px;margin-top:32px}
.hero-note{
  margin:28px 0 0;font-size:13px;letter-spacing:.04em;
  color:rgba(243,238,231,.55);
}

/* ========== 2 MANIFESTO ========== */
#manifesto{
  text-align:center;
  padding-block:clamp(80px,12vw,160px);
}
#manifesto .quote{
  font-family:var(--serif);font-weight:300;
  font-size:clamp(1.5rem,1rem + 2.2vw,2.5rem);
  letter-spacing:.06em;line-height:1.45;
  color:var(--brand);max-width:18em;margin:0 auto;
}
#manifesto .sub{
  margin:28px auto 0;max-width:36em;
  color:var(--muted);font-size:16px;line-height:1.8;
}

/* ========== 3 USE CASES ========== */
#use-cases .note-tag{
  display:inline-block;margin-bottom:12px;
  font-size:12px;letter-spacing:.14em;color:var(--accent);
  border-bottom:1px solid var(--accent);padding-bottom:2px;
}
.use-grid{
  list-style:none;margin:0;padding:0;
  display:grid;grid-template-columns:repeat(3,1fr);
  gap:0;border-top:1px solid var(--border);
}
.use-grid li{
  padding:36px 28px 36px 0;
  border-bottom:1px solid var(--border);
  border-right:1px solid var(--border);
}
.use-grid li:nth-child(3n){border-right:0;padding-right:0}
.use-grid .n{
  display:block;font-family:var(--serif);font-weight:300;
  font-size:13px;letter-spacing:.2em;color:var(--muted);margin-bottom:16px;
}
.use-grid h3{margin-bottom:10px}
.use-grid p{margin:0;color:var(--muted);font-size:15px;line-height:1.7;max-width:28ch}
.use-grid .media{margin-bottom:20px;max-width:100%}

/* ========== 4 NURSERY SPECS ========== */
#nursery-specs{background:var(--surface);border-block:1px solid var(--border)}
.spec-layout{
  display:grid;grid-template-columns:minmax(280px,5fr) minmax(0,7fr);
  gap:clamp(32px,5vw,64px);align-items:start;
}
.spec-sticky{
  position:sticky;top:100px;
}
.spec-sticky .media{width:100%}
.spec-list{display:flex;flex-direction:column;gap:0}
.spec-item{
  display:grid;grid-template-columns:1fr;gap:8px;
  padding:28px 0;border-bottom:1px solid var(--border);
}
.spec-item:first-child{border-top:1px solid var(--border)}
.spec-item-head{
  display:flex;justify-content:space-between;align-items:baseline;gap:16px;
}
.spec-item h3{font-size:1.2rem}
.spec-meta{
  display:grid;grid-template-columns:repeat(3,1fr);gap:12px 24px;
  margin-top:12px;font-size:14px;
}
.spec-meta dt{color:var(--muted);font-size:12px;letter-spacing:.08em;margin:0 0 4px}
.spec-meta dd{margin:0;font-weight:500}
.spec-meta dd.tbc{color:var(--accent);font-weight:400}
.spec-item .fields{
  margin:12px 0 0;font-size:14px;
  display:grid;grid-template-columns:1fr 1fr;gap:0 24px;
}
.spec-item .fields div{
  display:flex;justify-content:space-between;gap:12px;
  padding:8px 0;border-bottom:1px solid var(--soft);
}
.spec-item .fields dt{color:var(--muted);margin:0}
.spec-item .fields dd{margin:0;text-align:right}
.spec-item .fields dd.tbc{color:var(--accent)}
.spec-actions{margin-top:16px;display:flex;gap:10px;flex-wrap:wrap}
.callout{
  margin-top:40px;padding:20px 0 0;
  border-top:1px solid var(--border);
  font-size:14px;color:var(--muted);line-height:1.7;
}

/* ========== 5 IMAGE BAND ========== */
#image-band{
  position:relative;min-height:clamp(360px,50vw,560px);
  display:flex;align-items:center;justify-content:center;
  color:var(--on-brand);text-align:center;overflow:hidden;
}
.band-bg{
  position:absolute;inset:0;
  background:
    linear-gradient(180deg,rgba(23,61,49,.55) 0%,rgba(23,61,49,.7) 100%),
    linear-gradient(135deg,#173D31,#2a4a3c);
}
.band-bg img{width:100%;height:100%;object-fit:cover;opacity:.7}
.band-bg::after{
  content:"";position:absolute;inset:0;
  background:rgba(23,61,49,.55);
}
.band-content{
  position:relative;z-index:1;
  padding:var(--sec-pad) var(--pad-inline);max-width:720px;
}
.band-content p{
  font-family:var(--serif);font-weight:300;
  font-size:clamp(1.35rem,.9rem + 1.8vw,2rem);
  letter-spacing:.08em;line-height:1.5;margin:0;color:#fff;
}

/* ========== 6 CASES ========== */
.case-empty{
  border:1px solid var(--border);
  padding:clamp(40px,6vw,72px);
  text-align:center;background:var(--surface);
}
.case-empty h3{margin-bottom:12px}
.case-empty > p{margin:0 auto 32px;color:var(--muted);max-width:40ch}
.checklist{
  list-style:none;margin:0 auto;padding:0;max-width:640px;text-align:left;
  counter-reset:ck;
}
.checklist li{
  counter-increment:ck;
  display:grid;grid-template-columns:48px 1fr;gap:16px;
  align-items:start;padding:16px 0;
  border-bottom:1px solid var(--border);
  font-size:15px;line-height:1.6;
}
.checklist li::before{
  content:counter(ck,decimal-leading-zero);
  font-family:var(--serif);font-weight:300;
  font-size:14px;letter-spacing:.12em;color:var(--muted);padding-top:2px;
}
.case-slots{
  display:grid;grid-template-columns:1fr 1fr;gap:24px;margin-top:48px;
}
.case-slot{
  border:1px solid var(--border);background:var(--surface);
}
.case-slot .body{padding:20px 20px 24px}
.case-slot h3{font-size:1.1rem;margin-bottom:8px}
.case-slot p{margin:0;font-size:14px;color:var(--muted)}

/* ========== 7 COOPERATION ========== */
#cooperation{background:var(--bg)}
.steps{
  list-style:none;margin:0;padding:0;
  display:grid;grid-template-columns:repeat(4,1fr);gap:0;
  counter-reset:st;
}
.steps li{
  counter-increment:st;
  padding:0 28px 0 0;border-top:1px solid var(--border);padding-top:28px;
}
.steps li:last-child{padding-right:0}
.steps li::before{
  content:"0" counter(st);
  display:block;font-family:var(--serif);font-weight:300;
  font-size:clamp(2rem,1.5rem + 1.5vw,3rem);
  letter-spacing:.04em;color:var(--brand);line-height:1;margin-bottom:20px;
}
.steps h3{margin-bottom:10px}
.steps p{margin:0;color:var(--muted);font-size:15px;line-height:1.7;max-width:28ch}
.resp{
  margin-top:clamp(48px,7vw,80px);
  border:1px solid var(--border);padding:28px 32px;
  background:var(--surface);
}
.resp h3{margin-bottom:8px}
.resp-note{margin:0 0 20px;font-size:14px;color:var(--muted)}
.resp table{width:100%;border-collapse:collapse;font-size:15px}
.resp th,.resp td{
  text-align:left;padding:14px 8px;vertical-align:top;
  border-bottom:1px solid var(--border);
}
.resp tr:last-child th,.resp tr:last-child td{border-bottom:0}
.resp th{
  font-weight:500;letter-spacing:.06em;color:var(--brand);
  white-space:nowrap;width:1%;padding-right:32px;font-size:13px;
}
.resp td{color:var(--muted)}

/* ========== 8 INQUIRY ========== */
#inquiry{background:var(--surface);border-block:1px solid var(--border)}
.inq-wrap{max-width:720px;margin:0 auto}
.warn{
  border:1px solid var(--border);border-left:2px solid var(--brand);
  padding:14px 18px;font-size:14px;line-height:1.65;margin:0 0 28px;
  color:var(--text);background:var(--bg);
}
.stepline{
  list-style:none;margin:0 0 28px;padding:0;
  display:flex;flex-wrap:wrap;gap:6px 4px;
  font-size:12px;letter-spacing:.06em;color:var(--muted);
}
.stepline li{display:inline-flex;align-items:center}
.stepline li+li::before{content:"—";margin:0 10px;opacity:.5}
.panel{
  border:1px solid var(--border);background:var(--bg);
  padding:clamp(24px,4vw,40px);
}
.panel + .panel{margin-top:24px}
.panel h3{
  font-family:var(--sans);font-weight:500;font-size:15px;
  letter-spacing:.1em;margin-bottom:20px;color:var(--brand);
}
.row{display:grid;grid-template-columns:1fr 1fr;gap:16px}
.field{display:flex;flex-direction:column;gap:6px;margin-bottom:16px}
label{font-size:13px;letter-spacing:.06em;font-weight:500;color:var(--muted)}
input,select,textarea{
  min-height:48px;padding:10px 14px;
  border:1px solid var(--border);border-radius:0;
  background:var(--surface);width:100%;
  transition:border-color .3s;
}
input:focus,select:focus,textarea:focus{
  outline:none;border-color:var(--brand);
}
textarea{min-height:200px;line-height:1.65;resize:vertical}
.qty{display:grid;grid-template-columns:1fr 100px;gap:8px}
fieldset{
  border:1px solid var(--border);padding:20px 20px 4px;margin:0 0 16px;
}
legend{
  font-size:13px;letter-spacing:.1em;padding:0 8px;color:var(--brand);font-weight:500;
}
.items{list-style:none;margin:0 0 16px;padding:0}
.items li{
  display:flex;justify-content:space-between;align-items:center;gap:12px;
  padding:12px 0;border-bottom:1px solid var(--border);
  font-size:14px;line-height:1.5;
}
.items li.empty{color:var(--muted);justify-content:flex-start;border:0}
.btn-row{display:flex;gap:12px;flex-wrap:wrap}
.status{min-height:24px;font-size:14px;margin:12px 0 0;color:var(--brand)}
.status.err{color:#8a3a1a}
.copy-hint{
  font-size:13px;color:var(--muted);margin:12px 0 0;
  line-height:1.6;
  white-space:normal;
  word-break:keep-all;
  overflow-wrap:break-word;
}

/* ========== 9 FOOTER ========== */
footer{
  background:var(--brand);color:rgba(243,238,231,.75);
  padding:clamp(56px,8vw,96px) 0 40px;font-size:14px;
}
footer .foot-tagline{
  font-family:var(--serif);font-weight:300;
  font-size:clamp(1.25rem,1rem + 1vw,1.75rem);
  letter-spacing:.06em;line-height:1.4;color:#fff;margin:0 0 32px;
  max-width:18em;
}
footer .foot-meta{
  display:grid;grid-template-columns:repeat(3,1fr);gap:24px;
  padding-top:32px;border-top:1px solid rgba(243,238,231,.2);
}
footer dl{margin:0}
footer dt{
  font-size:11px;letter-spacing:.16em;text-transform:uppercase;
  color:rgba(243,238,231,.45);margin-bottom:6px;
}
footer dd{margin:0 0 16px;color:rgba(243,238,231,.8)}
footer .copy{
  margin-top:40px;padding-top:20px;
  border-top:1px solid rgba(243,238,231,.15);
  font-size:13px;letter-spacing:.04em;
  color:rgba(243,238,231,.5);
}

/* about section (short, within flow) */
#about .about-grid{
  display:grid;grid-template-columns:1fr 1fr;gap:clamp(32px,5vw,64px);
  align-items:start;
}
#about .about-text p{margin:0 0 16px;color:var(--muted);font-size:16px;line-height:1.8}
#about .about-text p:last-child{margin-bottom:0}

/* responsive */
@media (max-width:1100px){
  .use-grid{grid-template-columns:1fr 1fr}
  .use-grid li:nth-child(3n){border-right:1px solid var(--border);padding-right:28px}
  .use-grid li:nth-child(2n){border-right:0;padding-right:0}
  .steps{grid-template-columns:1fr 1fr;gap:40px 32px}
  .spec-layout{grid-template-columns:1fr}
  .spec-sticky{position:static}
  footer .foot-meta{grid-template-columns:1fr 1fr}
}
@media (max-width:860px){
  .nav-desktop{display:none}
  .menu-toggle{display:inline-flex}
  .site-header.is-solid,
  .site-header{background:rgba(243,238,231,.96);border-bottom-color:var(--border)}
  .case-slots,#about .about-grid{grid-template-columns:1fr}
  .row{grid-template-columns:1fr}
  .spec-item .fields{grid-template-columns:1fr}
  .spec-meta{grid-template-columns:1fr 1fr}
}
@media (max-width:640px){
  body{font-size:16px}
  .use-grid{grid-template-columns:1fr}
  .use-grid li,
  .use-grid li:nth-child(3n),
  .use-grid li:nth-child(2n){
    border-right:0;padding-right:0;
  }
  .steps{grid-template-columns:1fr;gap:32px}
  .hero-cta .btn{flex:1 1 100%}
  .resp{padding:20px}
  .resp th,.resp td{display:block;width:auto;padding:4px 0}
  .resp th{padding-top:14px}
  .resp td{padding-bottom:14px}
  .resp tr{display:block;border-bottom:1px solid var(--border)}
  .resp tr:last-child{border-bottom:0}
  .resp th,.resp td{border:0}
  footer .foot-meta{grid-template-columns:1fr}
  .nav-mobile a{font-size:24px}
  /* ensure hero text contrast on mobile */
  .hero-content h1{text-shadow:0 2px 20px rgba(0,0,0,.45)}
  .hero-bg::after{
    background:linear-gradient(180deg,rgba(23,61,49,.35) 0%,rgba(23,61,49,.75) 50%,rgba(23,61,49,.95) 100%);
  }
}
@media (prefers-reduced-motion:reduce){
  html{scroll-behavior:auto}
  .reveal{opacity:1;transform:none;transition:none}
  .media img,.btn,.site-header{transition:none!important}
  .media:hover img{transform:none}
}