:root {
  --ink:       #1c1410;
  --ink-mid:   #3d2e22;
  --gold:      #b8912a;
  --gold-lt:   #d4aa48;
  --gold-pale: rgba(184,145,42,.1);
  --cream:     #faf7f2;
  --cream-dk:  #f0ebe0;
  --warm-gray: #e8e0d4;
  --text:      #2a1f14;
  --text-mid:  #5a4a38;
  --text-lt:   #8a7a68;
  --navy:      #1a3a5c;
  --accent:    #8b2020;
  --white:     #ffffff;
}
*,*::before,*::after{margin:0;padding:0;box-sizing:border-box;}
html{scroll-behavior:smooth;}
body{
  font-family:'Noto Sans JP',sans-serif;
  font-weight:300; color:var(--text);
  background:var(--cream); overflow-x:hidden;
  font-size:16px; line-height:1;
}

/* ══ NAV ══ */
nav{
  position:fixed;top:0;left:0;right:0;z-index:900;
  background:#ffffff;
  backdrop-filter:blur(12px);
  border-bottom:1px solid rgba(184,145,42,.15);
  display:flex;align-items:center;
  padding:0 5%; gap:1.5rem;
  height:88px;
}
.nav-logo{display:flex;align-items:center;gap:14px;text-decoration:none;}
.nav-logo img{width:72px;height:72px;object-fit:contain;}
.nav-logo-text{display:flex;flex-direction:column;gap:4px;}
.nav-logo-ja{
  font-family:'Zen Old Mincho',serif;
  font-size:1.6rem;font-weight:700;
  color:var(--ink);letter-spacing:.15em;line-height:1;
}
.nav-logo-en{font-size:.6rem;color:var(--text-lt);letter-spacing:.3em;font-weight:300;}
.nav-links{display:flex;align-items:center;gap:1.8rem;margin-left:auto;}
.nav-links a{
  font-size:.78rem;letter-spacing:.1em;
  color:var(--text-mid);text-decoration:none;
  transition:color .3s;font-weight:400;
  white-space:nowrap;
}
.nav-links a:hover{color:var(--gold);}

/* ══ HERO SLIDER ══ */
#hero{
  padding-top:88px;
  position:relative;overflow:hidden;
  height:100vh;
}
.hero-slides{width:100%;height:100%;position:relative;}
.hero-slide{
  position:absolute;inset:0;
  opacity:0;transition:opacity 1.2s ease;
  display:flex;align-items:center;justify-content:center;
}
.hero-slide.active{opacity:1;}
.hero-slide-bg{
  position:absolute;inset:0;
  background-size:cover;background-position:center;
  transform:scale(1.05);
  transition:transform 8s ease;
}
.hero-slide.active .hero-slide-bg{transform:scale(1);}
.hero-slide-overlay{
  position:absolute;inset:0;
  background:linear-gradient(to bottom, rgba(28,20,16,.35) 0%, rgba(28,20,16,.55) 100%);
}
.hero-copy{
  position:relative;z-index:2;
  text-align:center;
  opacity:0;transform:translateY(20px);
  transition:opacity 1s .4s ease, transform 1s .4s ease;
}
.hero-slide.active .hero-copy{opacity:1;transform:translateY(0);}
.hero-copy-ja{
  font-family:'Zen Old Mincho',serif;
  font-size:clamp(2rem,5vw,4rem);
  color:#fff;letter-spacing:.15em;
  text-shadow:0 2px 20px rgba(0,0,0,.3);
  line-height:1.6;
}
.hero-copy-en{
  font-family:'Cormorant Garamond',serif;
  font-style:italic;font-size:clamp(.9rem,2vw,1.3rem);
  color:rgba(255,255,255,.65);letter-spacing:.25em;
  margin-top:.8rem;
}
.hero-copy-line{
  width:60px;height:1px;
  background:var(--gold-lt);
  margin:.8rem auto;opacity:.8;
}
.hero-dots{
  position:absolute;bottom:2rem;left:50%;
  transform:translateX(-50%);
  display:flex;gap:.6rem;z-index:3;
}
.hero-dot{
  width:8px;height:8px;border-radius:50%;
  background:rgba(255,255,255,.4);border:none;cursor:pointer;
  transition:all .3s;padding:0;
}
.hero-dot.active{background:var(--gold-lt);width:24px;border-radius:4px;}
.hero-scroll{
  position:absolute;bottom:2.5rem;right:5%;
  display:flex;flex-direction:column;align-items:center;gap:.5rem;
  z-index:3;
}
.hero-scroll-text{font-size:.58rem;letter-spacing:.3em;color:rgba(255,255,255,.4);}
.hero-scroll-bar{
  width:1px;height:40px;
  background:linear-gradient(to bottom,rgba(255,255,255,.3),transparent);
  position:relative;overflow:hidden;
}
.hero-scroll-bar::after{
  content:'';position:absolute;top:-100%;left:0;
  width:100%;height:100%;
  background:rgba(255,255,255,.6);
  animation:scroll-drop 2s infinite;
}
@keyframes scroll-drop{to{top:100%;}}

/* ══ SECTION BASE ══ */
.sec{padding:100px 8%;}
.sec-center{text-align:center;}
.sec-label{
  font-size:.65rem;letter-spacing:.5em;
  color:var(--gold);display:block;margin-bottom:.7rem;
  font-family:'Cormorant Garamond',serif;font-style:italic;
}
.sec-title{
  font-family:'Zen Old Mincho',serif;
  font-size:clamp(1.6rem,3vw,2.4rem);
  font-weight:400;line-height:1.4;
  color:var(--ink);margin-bottom:.6rem;
  letter-spacing:.08em;
}
.sec-title.on-dark{color:#fff;}
.sec-lead{
  font-size:.92rem;color:var(--text-mid);
  line-height:2.2;margin-bottom:3.5rem;
  max-width:640px;
}
.sec-lead.center{margin-left:auto;margin-right:auto;}
.gold-rule{
  width:48px;height:1px;
  background:var(--gold);
  margin:.8rem 0 2.5rem;
}
.gold-rule.center{margin-left:auto;margin-right:auto;}

/* ══ GREETING ══ */
#greeting{background:var(--cream);}
.greeting-layout{
  display:grid;grid-template-columns:1fr 1fr;
  gap:6rem;align-items:center;
  max-width:1100px;
}
.greeting-text p{
  font-size:.95rem;color:var(--text-mid);
  line-height:2.4;margin-bottom:1.5rem;font-weight:300;
}
.greeting-text strong{color:var(--ink);font-weight:500;}
.greeting-img{
  aspect-ratio:3/4;border-radius:4px;overflow:hidden;
  box-shadow:0 20px 60px rgba(28,20,16,.15);
  position:relative;
}
.greeting-img img{width:100%;height:100%;object-fit:contain;background:#c8c4b0;}
.greeting-img::after{
  content:'';position:absolute;
  bottom:-12px;right:-12px;
  width:60%;height:60%;
  border:1px solid rgba(184,145,42,.3);
  border-radius:2px;
  pointer-events:none;
}

/* ══ STRENGTHS ══ */
#strengths{background:var(--ink);position:relative;overflow:hidden;}
#strengths::before{
  content:'';position:absolute;inset:0;
  background-image:url("data:image/svg+xml,%3Csvg width='60' height='60' viewBox='0 0 60 60' xmlns='http://www.w3.org/2000/svg'%3E%3Cpath d='M30 0L60 30L30 60L0 30Z' fill='none' stroke='rgba(184,145,42,0.06)' stroke-width='0.5'/%3E%3C/svg%3E");
}
.str-grid{
  display:grid;grid-template-columns:repeat(4,1fr);
  gap:1px;background:rgba(184,145,42,.1);
  position:relative;z-index:1;
  max-width:calc(100% + 9rem);
  margin-left:-4.5rem;
  margin-right:-4.5rem;
}
.str-card{
  background:rgba(255,255,255,.02);
  padding:2.8rem 2rem;
  transition:background .4s;position:relative;overflow:hidden;
}
.str-card::before{
  content:'';position:absolute;top:0;left:0;
  width:100%;height:2px;
  background:var(--gold);
  transform:scaleX(0);transform-origin:left;
  transition:transform .4s;
}
.str-card:hover{background:rgba(184,145,42,.06);}
.str-card:hover::before{transform:scaleX(1);}
.str-num{
  font-family:'Cormorant Garamond',serif;
  font-size:.7rem;color:var(--gold);
  letter-spacing:.3em;margin-bottom:1.2rem;
}
.str-icon{font-size:1.8rem;margin-bottom:1rem;display:block;}
.str-name{
  font-family:'Noto Serif JP',serif;
  font-size:1rem;color:#fff;
  margin-bottom:.8rem;font-weight:400;line-height:1.4;
}
.str-desc{font-size:.82rem;color:rgba(255,255,255,.5);line-height:2;font-weight:300;}

/* ══ BUSINESS ══ */
#business{background:var(--cream-dk);}
.biz-icons{
  display:grid;grid-template-columns:repeat(3,1fr);
  gap:1.5rem;margin-bottom:5rem;
}
.biz-icon-card{
  background:var(--white);
  border:1px solid var(--warm-gray);
  padding:2rem 1.5rem;text-align:center;
  cursor:pointer;transition:all .3s;
  position:relative;
}
.biz-icon-card::after{
  content:'';position:absolute;
  bottom:0;left:0;width:0;height:2px;
  background:var(--gold);transition:width .4s;
}
.biz-icon-card:hover,.biz-icon-card.active{
  border-color:var(--gold);
  box-shadow:0 8px 30px rgba(28,20,16,.1);
}
.biz-icon-card:hover::after,.biz-icon-card.active::after{width:100%;}
.biz-icon-img{font-size:2.5rem;margin-bottom:1rem;display:block;}
.biz-icon-name{
  font-family:'Noto Serif JP',serif;
  font-size:.9rem;color:var(--ink);font-weight:400;line-height:1.4;
}
.biz-panels{}
.biz-panel{
  display:none;
  grid-template-columns:1fr 1fr;
  gap:5rem;align-items:center;
  animation:panel-in .5s ease both;
}
.biz-panel.active{display:grid;}
@keyframes panel-in{
  from{opacity:0;transform:translateY(16px);}
  to{opacity:1;transform:translateY(0);}
}
.biz-panel-text h3{
  font-family:'Zen Old Mincho',serif;
  font-size:1.4rem;color:var(--ink);
  margin-bottom:1rem;font-weight:400;
}
.biz-panel-text p{
  font-size:.9rem;color:var(--text-mid);
  line-height:2.3;margin-bottom:1rem;
}
.biz-panel-list{list-style:none;margin-bottom:1.5rem;}
.biz-panel-list li{
  font-size:.85rem;color:var(--text);
  padding:.5rem 0;
  border-bottom:1px solid var(--warm-gray);
  display:flex;align-items:center;gap:.6rem;
}
.biz-panel-list li::before{content:'―';color:var(--gold);font-size:.7rem;}
.biz-panel-img{
  aspect-ratio:4/3;border-radius:4px;overflow:hidden;
  box-shadow:0 16px 48px rgba(28,20,16,.12);
}
.biz-panel-img img{width:100%;height:100%;object-fit:cover;}
.ec-links{display:flex;gap:.7rem;margin-top:1rem;flex-wrap:wrap;}
.ec-btn{
  display:inline-flex;align-items:center;gap:.4rem;
  padding:.5rem 1rem;font-size:.72rem;font-weight:400;
  text-decoration:none;border-radius:2px;transition:opacity .3s;
}
.ec-btn:hover{opacity:.85;}
.ec-amazon{background:#FF9900;color:#111;}
.ec-rakuten{background:#BF0000;color:#fff;}

/* ══ OEM FLOW ══ */
#oem-flow{background:var(--ink-mid);position:relative;overflow:hidden;}
#oem-flow::before{
  content:'';position:absolute;inset:0;
  background-image:url("data:image/svg+xml,%3Csvg width='80' height='80' viewBox='0 0 80 80' xmlns='http://www.w3.org/2000/svg'%3E%3Ccircle cx='40' cy='40' r='38' fill='none' stroke='rgba(184,145,42,0.05)' stroke-width='0.5'/%3E%3Ccircle cx='40' cy='40' r='20' fill='none' stroke='rgba(184,145,42,0.04)' stroke-width='0.5'/%3E%3C/svg%3E");
}
.flow-steps{
  display:flex;align-items:flex-start;
  position:relative;z-index:1;margin-top:3rem;
}
.flow-step{flex:1;text-align:center;position:relative;}
.flow-step:not(:last-child)::after{
  content:'›';position:absolute;
  right:-8px;top:20px;
  font-size:1.2rem;color:rgba(255,255,255,.2);
  z-index:1;
}
.flow-num{
  font-family:'Cormorant Garamond',serif;
  font-size:.65rem;letter-spacing:.2em;
  color:rgba(255,255,255,.35);margin-bottom:.5rem;
}
.flow-dot{
  width:48px;height:48px;border-radius:50%;
  background:rgba(255,255,255,.05);
  border:1px solid rgba(184,145,42,.3);
  display:flex;align-items:center;justify-content:center;
  margin:0 auto .7rem;font-size:1.2rem;
  transition:all .3s;
}
.flow-step:hover .flow-dot{
  background:rgba(184,145,42,.2);
  border-color:var(--gold-lt);
}
.flow-label{
  font-size:.78rem;color:rgba(255,255,255,.7);
  line-height:1.7;font-weight:300;
}

/* ══ COMPANY ══ */
#company{background:var(--cream);}
.company-table-wrap{
  max-width:700px;
  margin:0 auto;
}
.company-table{width:100%;border-collapse:collapse;}
.company-table tr{border-bottom:1px solid var(--warm-gray);}
.company-table th{
  font-family:'Noto Serif JP',serif;
  font-size:.78rem;font-weight:400;color:var(--gold);
  text-align:left;padding:.9rem 1rem .9rem 0;
  vertical-align:top;width:32%;
  white-space:nowrap;letter-spacing:.06em;
}
.company-table td{
  font-size:.88rem;color:var(--text);
  padding:.9rem 0;line-height:1.9;vertical-align:top;
}
.company-table a{color:var(--navy);text-decoration:none;font-size:.8rem;}
.company-table a:hover{text-decoration:underline;}

/* ══ GALLERY ══ */
#gallery{background:var(--cream-dk);}
.gallery-grid{
  display:grid;
  grid-template-columns:repeat(5,1fr);
  gap:6px;
}
.gallery-item{
  aspect-ratio:1/1;overflow:hidden;
  position:relative;cursor:pointer;
}
.gallery-item img{
  width:100%;height:100%;object-fit:cover;
  transition:transform .6s ease;
}
.gallery-item:hover img{transform:scale(1.08);}
.gallery-overlay{
  position:absolute;inset:0;
  background:rgba(28,20,16,.5);
  opacity:0;transition:opacity .3s;
  display:flex;align-items:center;justify-content:center;
}
.gallery-item:hover .gallery-overlay{opacity:0;}
.gallery-overlay span{
  font-size:.7rem;letter-spacing:.2em;color:#fff;
  border:1px solid rgba(255,255,255,.5);
  padding:.4rem .9rem;
}

/* ══ CONTACT ══ */
#contact{background:var(--ink);position:relative;overflow:hidden;}
#contact::before{
  content:'';position:absolute;inset:0;
  background-image:url("data:image/svg+xml,%3Csvg width='60' height='60' viewBox='0 0 60 60' xmlns='http://www.w3.org/2000/svg'%3E%3Cpath d='M30 0L60 30L30 60L0 30Z' fill='none' stroke='rgba(184,145,42,0.05)' stroke-width='0.5'/%3E%3C/svg%3E");
}
.contact-inner{
  max-width:640px;margin:0 auto;
  position:relative;z-index:1;
}
.contact-form{display:flex;flex-direction:column;gap:1.2rem;margin-top:2rem;}
.form-row{display:grid;grid-template-columns:1fr 1fr;gap:1.2rem;}
.form-group{display:flex;flex-direction:column;gap:.4rem;}
.form-label{
  font-size:.72rem;letter-spacing:.1em;
  color:rgba(255,255,255,.5);font-weight:300;
}
.form-label span{color:var(--gold);margin-left:.3rem;font-size:.65rem;}
.form-input,.form-textarea{
  background:rgba(255,255,255,.06);
  border:1px solid rgba(184,145,42,.2);
  border-radius:2px;
  padding:.8rem 1rem;
  font-size:.85rem;color:#fff;
  font-family:'Noto Sans JP',sans-serif;
  font-weight:300;outline:none;
  transition:border-color .3s;
  width:100%;
}
.form-input::placeholder,.form-textarea::placeholder{color:rgba(255,255,255,.2);}
.form-input:focus,.form-textarea:focus{
  border-color:var(--gold);
  background:rgba(255,255,255,.08);
}
.form-textarea{height:140px;resize:vertical;}
.form-privacy{
  display:flex;align-items:flex-start;gap:.7rem;
  font-size:.75rem;color:rgba(255,255,255,.4);
  line-height:1.7;cursor:pointer;
}
.form-privacy input{margin-top:3px;accent-color:var(--gold);flex-shrink:0;}
.form-submit{
  background:var(--gold);
  color:var(--ink);
  border:none;padding:1rem 2.5rem;
  font-size:.82rem;font-weight:500;letter-spacing:.15em;
  font-family:'Noto Sans JP',sans-serif;
  cursor:pointer;transition:background .3s;
  align-self:center;margin-top:.5rem;
}
.form-submit:hover{background:var(--gold-lt);}

/* ══ FOOTER ══ */
footer{
  background:#ffffff;
  padding:2.5rem 8%;
  display:flex;align-items:center;justify-content:space-between;
  border-top:1px solid rgba(184,145,42,.2);
}
.footer-logo{display:flex;align-items:center;gap:10px;}
.footer-logo-en-bottom{display:block;font-size:.6rem;color:var(--text-lt);letter-spacing:.2em;margin-top:3px;}
.footer-logo img{width:72px;height:72px;object-fit:contain;}
.footer-logo-text-wrap{display:flex;flex-direction:column;gap:3px;}
.footer-logo-ja{
  font-family:'Zen Old Mincho',serif;
  font-size:1.6rem;font-weight:700;color:var(--ink);letter-spacing:.15em;line-height:1;
}
footer small{font-size:.62rem;color:var(--text-lt);letter-spacing:.1em;}

/* ══ PRINT ══ */
@media print{
  *{-webkit-print-color-adjust:exact!important;print-color-adjust:exact!important;}
  nav,.hero-scroll{display:none!important;}
  @page{margin:15mm 12mm;}
  #hero{min-height:auto;page-break-after:always;padding:40px 7%;}
  .sec{padding:32px 7%;}
  .biz-panel{display:grid!important;margin-bottom:2rem;}
  .gallery-grid{grid-template-columns:repeat(4,1fr);}
}

/* ══ REVEAL ══ */
.reveal{opacity:0;transform:translateY(18px);transition:opacity .85s ease,transform .85s ease;}
.reveal.in{opacity:1;transform:none;}
.d1{transition-delay:.08s}.d2{transition-delay:.16s}.d3{transition-delay:.24s}
.d4{transition-delay:.32s}.d5{transition-delay:.4s}.d6{transition-delay:.48s}
.d7{transition-delay:.56s}

/* ══ RESPONSIVE ══ */
@media(max-width:960px){
  .str-grid{grid-template-columns:1fr 1fr;}
  .biz-icons{grid-template-columns:1fr 1fr 1fr;}
  .biz-panel{grid-template-columns:1fr;gap:2rem;}
  .greeting-layout{grid-template-columns:1fr;gap:3rem;}
  .gallery-grid{grid-template-columns:repeat(3,1fr);}
  .flow-steps{flex-wrap:wrap;gap:1.5rem;}
  .flow-step{flex:0 0 calc(33% - 1rem);}
  .flow-step::after{display:none;}
  .nav-links{display:none;}
  .form-row{grid-template-columns:1fr;}
}
@media(max-width:600px){
  .str-grid{grid-template-columns:1fr;}
  .biz-icons{grid-template-columns:1fr 1fr 1fr;}
  .gallery-grid{grid-template-columns:1fr 1fr;}
}