/* =========================================================
   SEISHIN MOLD — Premium Corporate Theme  (2026 Renewal)
   ========================================================= */

:root{
  --ink:#0a1420;
  --navy:#0e1e30;
  --navy-2:#12253c;
  --gold:#c9a15e;
  --gold-light:#e7cd97;
  --gold-dark:#a8813f;
  --paper:#f6f7f9;
  --white:#ffffff;
  --text:#22303e;
  --muted:#6f7d8b;
  --line:#e3e7ec;
  --line-dark:rgba(255,255,255,.12);
  --font-sans:'Noto Sans JP','Hiragino Kaku Gothic ProN','Yu Gothic',sans-serif;
  --font-mincho:'Shippori Mincho','Hiragino Mincho ProN','Yu Mincho',serif;
  --container:1180px;
  --radius:4px;
  --shadow-soft:0 18px 50px rgba(10,20,32,.10);
  --shadow-lift:0 26px 70px rgba(10,20,32,.16);
}

*,*::before,*::after{box-sizing:border-box;}
html{scroll-behavior:smooth;}
body{
  margin:0;
  font-family:var(--font-sans);
  font-weight:400;
  color:var(--text);
  background:var(--white);
  line-height:1.9;
  letter-spacing:.02em;
  -webkit-font-smoothing:antialiased;
  overflow-x:hidden;
}
img{max-width:100%;display:block;}
a{color:inherit;text-decoration:none;}
ul{margin:0;padding:0;list-style:none;}
h1,h2,h3,h4{margin:0;font-weight:600;line-height:1.5;}
p{margin:0 0 1em;}
.container{max-width:var(--container);margin:0 auto;padding:0 24px;}

/* ---------- Typography helpers ---------- */
.sec{padding:110px 0;}
.sec-tight{padding:80px 0;}
.sec-label{
  display:flex;align-items:center;gap:14px;
  font-size:12px;letter-spacing:.42em;text-transform:uppercase;
  color:var(--gold-dark);font-weight:700;margin-bottom:14px;
}
.sec-label::before{content:"";width:44px;height:1px;background:var(--gold);}
.sec-title{
  font-family:var(--font-mincho);
  font-size:clamp(26px,3.4vw,38px);
  letter-spacing:.08em;
  color:var(--ink);
  margin-bottom:28px;
}
.sec-title .thin{font-weight:500;}
.lead{font-size:16px;color:var(--text);max-width:860px;}

/* About Us: 左文右图 */
.intro-grid{
  display:grid;grid-template-columns:1.55fr 1fr;gap:60px;
  align-items:center;margin-top:10px;
}
.intro-visual{position:relative;margin:24px 26px 64px 0;}
.intro-visual img{
  width:100%;height:400px;object-fit:cover;object-position:74% center;
  border-radius:2px;box-shadow:var(--shadow-lift);display:block;
}
.intro-visual::after{
  content:"";position:absolute;top:22px;left:-22px;right:22px;bottom:-22px;
  border:1px solid var(--gold);border-radius:2px;z-index:-1;
}
.intro-facts{
  position:absolute;left:30px;bottom:-38px;
  background:#fff;border:1px solid var(--line);border-top:2px solid var(--gold);
  box-shadow:var(--shadow-lift);padding:20px 24px;display:grid;gap:11px;min-width:250px;
}
.fact{display:flex;gap:16px;font-size:13px;align-items:baseline;}
.fact .k{
  color:var(--gold-dark);font-weight:700;font-size:11px;
  letter-spacing:.14em;flex:0 0 auto;
}
.fact .v{color:var(--text);letter-spacing:.02em;}
.gold{color:var(--gold-dark);}

/* ---------- Buttons ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:10px;
  padding:15px 38px;font-size:14px;letter-spacing:.14em;font-weight:500;
  border-radius:2px;transition:all .35s ease;border:1px solid transparent;
  cursor:pointer;font-family:var(--font-sans);
}
.btn-gold{background:linear-gradient(135deg,var(--gold) 0%,var(--gold-dark) 100%);color:#fff;box-shadow:0 10px 26px rgba(168,129,63,.35);}
.btn-gold:hover{transform:translateY(-2px);box-shadow:0 16px 34px rgba(168,129,63,.45);}
.btn-ghost{border-color:rgba(255,255,255,.45);color:#fff;}
.btn-ghost:hover{background:rgba(255,255,255,.12);border-color:#fff;}
.btn-dark{background:var(--ink);color:#fff;}
.btn-dark:hover{background:var(--navy-2);transform:translateY(-2px);}
.btn .arr{transition:transform .35s ease;}
.btn:hover .arr{transform:translateX(5px);}

/* =========================================================
   HEADER
   ========================================================= */
.site-header{
  position:fixed;top:0;left:0;right:0;z-index:1000;
  padding:22px 0;
  transition:background .4s ease,padding .4s ease,box-shadow .4s ease;
}
.site-header.scrolled{
  background:rgba(10,20,32,.94);
  -webkit-backdrop-filter:blur(12px);backdrop-filter:blur(12px);
  padding:12px 0;box-shadow:0 6px 30px rgba(0,0,0,.25);
}
.header-inner{display:flex;align-items:center;justify-content:space-between;gap:24px;}

.brand{display:flex;align-items:center;gap:14px;min-width:0;}
.brand-mark{width:54px;height:46px;flex:0 0 54px;}
.brand-mark img{width:100%;height:100%;object-fit:contain;object-position:left center;display:block;}
.brand-text{display:flex;flex-direction:column;line-height:1.3;}
.brand-jp{
  font-family:var(--font-mincho);font-size:21px;font-weight:600;color:#fff;letter-spacing:.12em;white-space:nowrap;
}
.brand-en{font-size:9.5px;letter-spacing:.34em;color:var(--gold);text-transform:uppercase;white-space:nowrap;}

.main-nav > ul{display:flex;align-items:center;gap:6px;}
.main-nav a{
  display:block;padding:10px 18px;color:rgba(255,255,255,.88);
  font-size:14.5px;letter-spacing:.1em;position:relative;transition:color .3s;
}
.main-nav > ul > li > a::after{
  content:"";position:absolute;left:18px;right:18px;bottom:4px;height:1px;
  background:var(--gold);transform:scaleX(0);transform-origin:left;transition:transform .35s ease;
}
.main-nav > ul > li > a:hover::after,
.main-nav > ul > li > a.active::after{transform:scaleX(1);}
.main-nav > ul > li > a:hover,
.main-nav > ul > li > a.active{color:#fff;}

.nav-cta{
  border:1px solid var(--gold);color:var(--gold-light) !important;margin-left:10px;
  transition:background .3s,color .3s;
}
.nav-cta:hover{background:var(--gold);color:#fff !important;}
.nav-cta::after{display:none;}

/* Language switcher in nav */
.nav-lang{margin-left:18px;padding-left:18px;border-left:1px solid rgba(255,255,255,.18);}
.nav-lang > a{
  display:inline-flex !important;align-items:center;gap:8px;font-size:12.5px;
  letter-spacing:.14em;color:rgba(255,255,255,.72) !important;padding:8px 14px !important;
  border:1px solid rgba(255,255,255,.28);border-radius:2px;transition:all .3s ease;
}
.nav-lang > a::after{display:none;}
.nav-lang > a:hover{
  color:var(--gold-light) !important;border-color:var(--gold);background:rgba(201,161,94,.12);
}
.nav-lang .globe{
  width:20px;height:20px;display:inline-flex;align-items:center;justify-content:center;
  background:var(--gold);color:#101c2a;font-size:11px;border-radius:2px;flex:0 0 20px;
}

/* Dropdown */
.has-drop{position:relative;}
.has-drop > a .caret{display:inline-block;margin-left:6px;transition:transform .3s;font-size:10px;}
.has-drop:hover .caret{transform:rotate(180deg);}
.drop{
  position:absolute;top:calc(100% + 14px);left:50%;transform:translate(-50%,10px);
  min-width:250px;background:#fff;border-top:2px solid var(--gold);
  box-shadow:var(--shadow-lift);padding:8px 0;
  opacity:0;visibility:hidden;transition:all .35s ease;
}
.drop ul{display:block;}
.drop li{margin:0;}
.has-drop:hover .drop{opacity:1;visibility:visible;transform:translate(-50%,0);}
.drop a{
  display:block;color:var(--text) !important;font-size:13.5px;letter-spacing:.08em;
  white-space:nowrap;padding:11px 22px;
  border-left:2px solid transparent;transition:all .25s;
}
.drop a:hover,.drop a.active{background:var(--paper);border-left-color:var(--gold);color:var(--ink) !important;padding-left:28px;}

/* Hamburger */
.nav-toggle{
  display:none;background:none;border:0;width:44px;height:44px;cursor:pointer;
  flex-direction:column;justify-content:center;gap:6px;align-items:center;z-index:1100;
}
.nav-toggle span{display:block;width:26px;height:2px;background:#fff;transition:all .35s ease;}
.nav-toggle.open span:nth-child(1){transform:translateY(8px) rotate(45deg);}
.nav-toggle.open span:nth-child(2){opacity:0;}
.nav-toggle.open span:nth-child(3){transform:translateY(-8px) rotate(-45deg);}

/* =========================================================
   HERO (HOME)
   ========================================================= */
.hero{
  position:relative;min-height:100vh;display:flex;align-items:center;
  padding:150px 0 120px;color:#fff;overflow:hidden;
}
.hero-bg{position:absolute;inset:0;z-index:0;background:#0a1420;}
.hero-photo{
  position:absolute;inset:0;width:100%;height:100%;object-fit:cover;
  object-position:72% center;opacity:.92;
}
.hero-veil{
  position:absolute;inset:0;
  background:
    radial-gradient(1100px 520px at 82% -8%, rgba(201,161,94,.10), transparent 62%),
    linear-gradient(90deg, rgba(7,15,25,.97) 0%, rgba(7,15,25,.86) 30%, rgba(7,15,25,.52) 58%, rgba(7,15,25,.14) 84%, rgba(7,15,25,0) 100%),
    linear-gradient(180deg, rgba(7,15,25,.62) 0%, rgba(7,15,25,0) 26%, rgba(7,15,25,0) 66%, rgba(10,20,32,.92) 100%);
}
.hero-bg::after{
  content:"";position:absolute;inset:0;opacity:.5;
  background-image:
    linear-gradient(rgba(255,255,255,.05) 1px,transparent 1px),
    linear-gradient(90deg,rgba(255,255,255,.05) 1px,transparent 1px);
  background-size:58px 58px;
  -webkit-mask-image:radial-gradient(ellipse 70% 60% at 68% 40%,#000 0%,transparent 75%);
  mask-image:radial-gradient(ellipse 70% 60% at 68% 40%,#000 0%,transparent 75%);
}
.hero-inner{
  position:relative;z-index:2;width:100%;
  display:flex;justify-content:space-between;align-items:flex-end;gap:40px;
}
.hero-text{max-width:690px;}
.hero-en{
  font-size:12px;letter-spacing:.5em;color:var(--gold);text-transform:uppercase;
  margin-bottom:26px;display:flex;align-items:center;gap:16px;font-weight:700;
}
.hero-en::before{content:"";width:52px;height:1px;background:var(--gold);}
.hero h1{
  font-family:var(--font-mincho);
  font-size:clamp(30px,4.6vw,52px);font-weight:600;line-height:1.62;letter-spacing:.06em;
  margin-bottom:22px;
}
.hero-sub{
  font-size:clamp(15px,1.6vw,19px);color:rgba(255,255,255,.82);
  letter-spacing:.16em;margin-bottom:44px;font-weight:300;
}
.hero-btns{display:flex;gap:18px;flex-wrap:wrap;}

.hero-side{
  position:relative;display:flex;flex-direction:column;align-items:flex-end;
  gap:28px;padding-bottom:10px;flex-shrink:0;
}
.hero-vert{
  writing-mode:vertical-rl;font-size:10px;letter-spacing:.52em;
  color:rgba(255,255,255,.42);text-transform:uppercase;font-weight:600;
}
.hero-badge{
  background:linear-gradient(135deg,var(--gold),var(--gold-dark));
  color:#fff;padding:16px 26px;font-size:13px;letter-spacing:.18em;line-height:1.7;
  box-shadow:0 18px 40px rgba(168,129,63,.4);border-radius:2px;text-align:center;
  animation:floatY 6s ease-in-out infinite;
}
@keyframes floatY{0%,100%{transform:translateY(0);}50%{transform:translateY(-10px);}}

.scroll-hint{
  position:absolute;left:50%;bottom:34px;transform:translateX(-50%);z-index:3;
  color:rgba(255,255,255,.65);font-size:10px;letter-spacing:.4em;text-align:center;
}
.scroll-hint::after{
  content:"";display:block;width:1px;height:46px;margin:10px auto 0;
  background:linear-gradient(var(--gold),transparent);
  animation:drip 2s ease-in-out infinite;
}
@keyframes drip{0%{transform:scaleY(0);transform-origin:top;}55%{transform:scaleY(1);transform-origin:top;}56%{transform-origin:bottom;}100%{transform:scaleY(0);transform-origin:bottom;}}

/* ---------- Page hero (sub pages) ---------- */
.page-hero{
  position:relative;padding:190px 0 92px;color:#fff;overflow:hidden;
}
.page-hero .hero-bg{z-index:0;}
.page-hero .hero-bg::after{opacity:.04;}
.page-hero-inner{position:relative;z-index:2;}
.ph-en{
  font-size:11px;letter-spacing:.5em;color:var(--gold);text-transform:uppercase;
  font-weight:700;margin-bottom:14px;
}
.ph-title{
  font-family:var(--font-mincho);font-size:clamp(28px,4vw,42px);
  letter-spacing:.1em;margin-bottom:20px;
}
.breadcrumb{
  display:flex;align-items:center;gap:10px;font-size:12.5px;color:rgba(255,255,255,.55);letter-spacing:.1em;
}
.breadcrumb a{color:rgba(255,255,255,.75);transition:color .3s;}
.breadcrumb a:hover{color:var(--gold-light);}
.breadcrumb .sep{color:rgba(255,255,255,.3);}

/* =========================================================
   HOME SECTIONS
   ========================================================= */
/* Intro */
.pillars{display:grid;grid-template-columns:repeat(3,1fr);gap:26px;margin-top:64px;}
.pillar{
  background:#fff;border:1px solid var(--line);padding:44px 34px;position:relative;
  transition:transform .4s ease,box-shadow .4s ease,border-color .4s;
}
.pillar::before{
  content:"";position:absolute;top:0;left:0;width:0;height:2px;background:var(--gold);
  transition:width .5s ease;
}
.pillar:hover{transform:translateY(-8px);box-shadow:var(--shadow-lift);border-color:transparent;}
.pillar:hover::before{width:100%;}
.pillar-num{
  font-family:var(--font-mincho);font-size:44px;color:rgba(201,161,94,.35);
  line-height:1;margin-bottom:20px;font-weight:600;
}
.pillar h3{font-family:var(--font-mincho);font-size:20px;letter-spacing:.1em;margin-bottom:14px;color:var(--ink);}
.pillar p{font-size:14px;color:var(--muted);margin:0;line-height:2;}

/* Services (dark band) */
.sec-dark{background:var(--ink);color:#fff;position:relative;overflow:hidden;}
.sec-dark .sec-label{color:var(--gold);}
.sec-dark .sec-title{color:#fff;}
.sec-dark::before{
  content:"";position:absolute;inset:0;
  background-image:
    linear-gradient(rgba(255,255,255,.035) 1px,transparent 1px),
    linear-gradient(90deg,rgba(255,255,255,.035) 1px,transparent 1px);
  background-size:58px 58px;
  -webkit-mask-image:radial-gradient(ellipse 70% 80% at 50% 0%,#000,transparent 80%);
  mask-image:radial-gradient(ellipse 70% 80% at 50% 0%,#000,transparent 80%);
  pointer-events:none;
}
.svc-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:22px;margin-top:52px;position:relative;z-index:1;}
.svc-card{
  background:rgba(255,255,255,.045);border:1px solid var(--line-dark);
  overflow:hidden;display:flex;flex-direction:column;
  transition:transform .45s ease,background .45s,border-color .45s;backdrop-filter:blur(2px);
}
.svc-card:hover{transform:translateY(-10px);background:rgba(255,255,255,.08);border-color:rgba(201,161,94,.55);}
.svc-thumb{overflow:hidden;aspect-ratio:4/3;}
.svc-thumb img{width:100%;height:100%;object-fit:cover;transition:transform .8s ease;}
.svc-card:hover .svc-thumb img{transform:scale(1.08);}
.svc-body{padding:26px 24px 30px;display:flex;flex-direction:column;flex:1;}
.svc-num{font-size:11px;letter-spacing:.34em;color:var(--gold);margin-bottom:10px;}
.svc-body h3{font-family:var(--font-mincho);font-size:19px;letter-spacing:.1em;margin-bottom:12px;}
.svc-body p{font-size:13px;color:rgba(255,255,255,.62);flex:1;margin-bottom:18px;}
.svc-link{
  font-size:12px;letter-spacing:.22em;color:var(--gold-light);
  display:inline-flex;align-items:center;gap:8px;transition:gap .3s;
}
.svc-card:hover .svc-link{gap:14px;}

/* Fields band */
.fields-grid{display:grid;grid-template-columns:.9fr 1.1fr;gap:70px;align-items:center;}
.fields-visual{position:relative;padding-bottom:56px;}
.fields-visual .fv-a{width:80%;border-radius:2px;box-shadow:var(--shadow-lift);position:relative;z-index:1;}
.fields-visual .fv-b{
  position:absolute;right:0;bottom:0;width:50%;z-index:2;
  border:8px solid #fff;border-radius:2px;box-shadow:var(--shadow-lift);
}
.fields-visual::after{
  content:"";position:absolute;top:22px;left:-22px;width:60%;height:70%;
  border:1px solid var(--gold);border-radius:2px;z-index:0;
}
.field-item{display:flex;gap:22px;padding:26px 0;border-bottom:1px solid var(--line);}
.field-item:first-child{padding-top:0;}
.field-item:last-child{border-bottom:0;padding-bottom:0;}
.field-idx{
  font-family:var(--font-mincho);color:var(--gold-dark);font-size:15px;font-weight:600;
  flex:0 0 auto;padding-top:2px;
}
.field-item h4{font-size:16.5px;letter-spacing:.08em;margin-bottom:6px;color:var(--ink);}
.field-item p{font-size:13.5px;color:var(--muted);margin:0;}

/* ---------- Spec tables / rich content blocks ---------- */
.tbl-wrap{overflow-x:auto;-webkit-overflow-scrolling:touch;}
.tbl{width:100%;border-collapse:collapse;background:#fff;min-width:620px;}
.tbl th,.tbl td{
  border:1px solid var(--line);padding:15px 22px;text-align:left;
  font-size:13.5px;line-height:1.95;vertical-align:top;
}
.tbl th{
  background:var(--paper);font-weight:600;color:var(--ink);
  letter-spacing:.1em;position:relative;width:190px;
}
.tbl th::before{content:"";position:absolute;left:0;top:0;bottom:0;width:3px;background:var(--gold);}
.tbl thead th{
  background:var(--ink);color:#fff;font-size:12.5px;letter-spacing:.16em;
  width:auto;white-space:nowrap;
}
.tbl thead th::before{display:none;}
.tbl tbody tr:hover td{background:#fbfcfd;}
.tbl td strong{color:var(--ink);}

.sub-title{
  font-family:var(--font-mincho);font-size:19px;color:var(--ink);letter-spacing:.1em;
  margin:0 0 8px;display:flex;align-items:center;gap:12px;font-weight:600;
}
.sub-title::before{content:"";width:8px;height:8px;background:var(--gold);transform:rotate(45deg);flex:0 0 8px;}
.sub-title .en{font-family:var(--font-sans);font-size:11px;letter-spacing:.3em;color:var(--muted);font-weight:400;}
.block-intro{font-size:14px;color:var(--muted);margin:0 0 24px;line-height:2;}
.sec-gap{margin-bottom:52px;}

.note-box{
  background:var(--paper);border:1px solid var(--line);border-left:3px solid var(--gold);
  padding:22px 28px;font-size:13.5px;color:var(--text);margin:0 0 44px;line-height:2.1;
}
.note-box strong{color:var(--ink);}

/* Process / spec step cards */
.steps-grid{
  display:grid;grid-template-columns:repeat(auto-fit,minmax(230px,1fr));gap:22px;margin-bottom:52px;
}
.step-c{
  background:#fff;border:1px solid var(--line);padding:28px 26px;
  transition:transform .4s ease,box-shadow .4s ease;
}
.step-c:hover{transform:translateY(-6px);box-shadow:var(--shadow-soft);}
.step-c .no{
  font-family:var(--font-mincho);color:var(--gold-dark);font-size:13px;
  letter-spacing:.24em;margin-bottom:10px;display:block;
}
.step-c h4{font-size:16px;color:var(--ink);margin-bottom:8px;letter-spacing:.08em;}
.step-c p{font-size:13px;color:var(--muted);margin:0;line-height:2;}

/* Defect & solution cards */
.defect-grid{
  display:grid;grid-template-columns:repeat(auto-fit,minmax(320px,1fr));gap:20px;margin-bottom:52px;
}
.defect-c{
  background:#fff;border:1px solid var(--line);padding:26px 30px;
  transition:transform .4s ease,box-shadow .4s ease;
}
.defect-c:hover{transform:translateY(-5px);box-shadow:var(--shadow-soft);}
.defect-c h4{
  font-size:16px;color:var(--ink);margin-bottom:2px;
  display:flex;align-items:center;gap:12px;letter-spacing:.08em;
}
.defect-c h4::before{content:"";width:8px;height:8px;background:var(--gold);transform:rotate(45deg);flex:0 0 8px;}
.defect-c .cause{font-size:11.5px;letter-spacing:.14em;color:var(--gold-dark);margin-bottom:10px;display:block;}
.defect-c p{font-size:13.5px;color:var(--muted);margin:0;}

/* Strengths (home) */
.strengths{
  display:grid;grid-template-columns:repeat(auto-fit,minmax(240px,1fr));gap:22px;margin-top:56px;
}
.st-item{
  background:#fff;border:1px solid var(--line);padding:36px 28px;position:relative;overflow:hidden;
  transition:transform .4s ease,box-shadow .4s ease;
}
.st-item::after{
  content:"";position:absolute;top:-34px;right:-34px;width:78px;height:78px;border-radius:50%;
  background:radial-gradient(circle,rgba(201,161,94,.16),transparent 70%);
}
.st-item:hover{transform:translateY(-8px);box-shadow:var(--shadow-lift);}
.st-item .no{
  font-family:var(--font-mincho);font-size:34px;color:rgba(201,161,94,.42);
  line-height:1;margin-bottom:18px;display:block;font-weight:600;
}
.st-item h4{font-family:var(--font-mincho);font-size:17.5px;letter-spacing:.1em;color:var(--ink);margin-bottom:10px;}
.st-item p{font-size:13px;color:var(--muted);margin:0;line-height:2;}

/* Product CTA note */
.prod-note{
  background:var(--ink);color:#fff;padding:38px 42px;margin-bottom:52px;position:relative;overflow:hidden;
}
.prod-note::before{
  content:"";position:absolute;inset:0;
  background-image:
    linear-gradient(rgba(255,255,255,.04) 1px,transparent 1px),
    linear-gradient(90deg,rgba(255,255,255,.04) 1px,transparent 1px);
  background-size:44px 44px;
  -webkit-mask-image:radial-gradient(ellipse at 100% 0%,#000,transparent 75%);
  mask-image:radial-gradient(ellipse at 100% 0%,#000,transparent 75%);
}
.prod-note > *{position:relative;}
.prod-note h4{font-family:var(--font-mincho);font-size:19px;letter-spacing:.1em;margin-bottom:12px;}
.prod-note p{font-size:13.5px;color:rgba(255,255,255,.72);margin:0;line-height:2.1;}

/* News */
.news-list{border-top:1px solid var(--line);}
.news-item{
  display:flex;align-items:baseline;gap:30px;padding:24px 6px;
  border-bottom:1px solid var(--line);transition:background .3s,padding .3s;
}
.news-item:hover{background:var(--paper);padding-left:16px;}
.news-date{
  font-family:var(--font-mincho);color:var(--gold-dark);font-size:15px;
  letter-spacing:.12em;flex:0 0 auto;
}
.news-body{font-size:14.5px;color:var(--text);}

/* CTA band */
.cta-band{
  position:relative;color:#fff;overflow:hidden;
  background:
    radial-gradient(800px 400px at 20% 0%,rgba(201,161,94,.16),transparent 60%),
    linear-gradient(90deg, rgba(11,22,35,.98) 0%, rgba(11,22,35,.92) 52%, rgba(11,22,35,.62) 100%),
    url("../images/ai/mold_part.jpg") right center/cover no-repeat,
    linear-gradient(140deg,#0d1c2c,#0a1420);
}
.cta-band::before{
  content:"";position:absolute;inset:0;
  background-image:
    linear-gradient(rgba(255,255,255,.04) 1px,transparent 1px),
    linear-gradient(90deg,rgba(255,255,255,.04) 1px,transparent 1px);
  background-size:58px 58px;
  -webkit-mask-image:radial-gradient(ellipse at 80% 50%,#000,transparent 75%);
  mask-image:radial-gradient(ellipse at 80% 50%,#000,transparent 75%);
}
.cta-inner{
  position:relative;z-index:1;display:flex;align-items:center;
  justify-content:space-between;gap:40px;padding:84px 0;flex-wrap:wrap;
}
.cta-inner h2{font-family:var(--font-mincho);font-size:clamp(24px,3vw,34px);letter-spacing:.1em;margin-bottom:10px;}
.cta-inner p{color:rgba(255,255,255,.7);font-size:14.5px;margin:0;letter-spacing:.08em;}

/* =========================================================
   ABOUT
   ========================================================= */
.company-table{width:100%;border-collapse:collapse;background:#fff;}
.company-table th,.company-table td{
  border:1px solid var(--line);padding:20px 28px;vertical-align:top;text-align:left;
}
.company-table th{
  width:220px;background:var(--paper);font-weight:600;color:var(--ink);
  font-size:14.5px;letter-spacing:.14em;position:relative;
}
.company-table th::before{
  content:"";position:absolute;left:0;top:0;bottom:0;width:3px;background:var(--gold);
}
.company-table td{font-size:14.5px;line-height:2;}
.about-note{background:#fff;border:1px solid var(--line);padding:40px 44px;}
.about-note ol{margin:0;padding-left:0;list-style:none;counter-reset:item;}
.about-note li{
  counter-increment:item;display:flex;gap:18px;padding:14px 0;font-size:14.5px;line-height:2;
  border-bottom:1px dashed var(--line);
}
.about-note li:last-child{border-bottom:0;}
.about-note li::before{
  content:"0" counter(item);font-family:var(--font-mincho);color:var(--gold-dark);
  font-weight:600;flex:0 0 auto;
}
.map-wrap{
  background:var(--paper);border:1px solid var(--line);padding:40px;
  display:flex;align-items:center;justify-content:space-between;gap:30px;flex-wrap:wrap;
}
.map-wrap h3{font-family:var(--font-mincho);font-size:19px;letter-spacing:.1em;color:var(--ink);}

/* =========================================================
   PRODUCTS
   ========================================================= */
.svc-head{
  display:flex;align-items:baseline;gap:20px;margin-bottom:12px;flex-wrap:wrap;
}
.svc-head h3{
  font-family:var(--font-mincho);font-size:24px;letter-spacing:.1em;color:var(--ink);
  display:flex;align-items:center;gap:14px;
}
.svc-head h3::before{content:"";width:8px;height:8px;background:var(--gold);transform:rotate(45deg);}
.svc-head .en{font-size:11px;letter-spacing:.36em;color:var(--muted);text-transform:uppercase;}
.svc-desc{max-width:820px;color:var(--text);font-size:15px;margin-bottom:44px;}
.gallery{
  display:grid;gap:20px;margin-bottom:70px;
  grid-template-columns:repeat(auto-fill,minmax(250px,1fr));
}
.gallery.g2{grid-template-columns:repeat(auto-fill,minmax(360px,1fr));}
.g-item{
  background:#fff;border:1px solid var(--line);overflow:hidden;position:relative;
  transition:transform .4s ease,box-shadow .4s ease;
}
.g-item:hover{transform:translateY(-6px);box-shadow:var(--shadow-lift);}
.g-item img{width:100%;aspect-ratio:4/3;object-fit:cover;transition:transform .8s ease;}
.g-item:hover img{transform:scale(1.06);}
.g-item::after{
  content:"";position:absolute;left:0;bottom:0;width:100%;height:3px;
  background:linear-gradient(90deg,var(--gold),var(--gold-dark));
  transform:scaleX(0);transform-origin:left;transition:transform .45s ease;
}
.g-item:hover::after{transform:scaleX(1);}
.product-block{margin-bottom:80px;}
.product-block:last-child{margin-bottom:0;}

/* =========================================================
   PROCESS
   ========================================================= */
.flow{position:relative;margin-top:64px;}
.flow-line{
  position:absolute;top:34px;left:4%;right:4%;height:1px;
  background:linear-gradient(90deg,transparent,var(--gold) 8%,var(--gold) 92%,transparent);
}
.flow-steps{display:grid;grid-template-columns:repeat(9,1fr);gap:6px;position:relative;}
.flow-step{text-align:center;padding:0 4px;}
.flow-dot{
  width:68px;height:68px;margin:0 auto 20px;border-radius:50%;
  background:#fff;border:1px solid var(--gold);
  display:flex;align-items:center;justify-content:center;
  font-family:var(--font-mincho);font-size:15px;color:var(--gold-dark);font-weight:600;
  transition:all .4s ease;position:relative;z-index:1;
}
.flow-step:hover .flow-dot{
  background:var(--gold);color:#fff;transform:scale(1.12);
  box-shadow:0 14px 32px rgba(168,129,63,.4);
}
.flow-step h4{font-size:13.5px;letter-spacing:.06em;color:var(--ink);line-height:1.6;}
.flow-step p{font-size:11.5px;color:var(--muted);margin-top:4px;line-height:1.7;}

.support-band{background:var(--paper);border:1px solid var(--line);}
.support-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:24px;}
.support-card{
  background:#fff;padding:38px 30px;text-align:center;border:1px solid var(--line);
  transition:transform .4s,box-shadow .4s;position:relative;overflow:hidden;
}
.support-card::after{
  content:"";position:absolute;top:-30px;right:-30px;width:80px;height:80px;border-radius:50%;
  background:radial-gradient(circle,rgba(201,161,94,.18),transparent 70%);
}
.support-card:hover{transform:translateY(-6px);box-shadow:var(--shadow-lift);}
.support-card .ic{font-family:var(--font-mincho);font-size:30px;color:var(--gold-dark);margin-bottom:16px;display:block;}
.support-card h4{font-size:16px;letter-spacing:.14em;color:var(--ink);margin-bottom:8px;}
.support-card p{font-size:13px;color:var(--muted);margin:0;}

/* =========================================================
   CONTACT
   ========================================================= */
.contact-grid{display:grid;grid-template-columns:.95fr 1.05fr;gap:56px;align-items:start;}
.info-card{
  background:var(--ink);color:#fff;padding:48px 44px;position:relative;overflow:hidden;
}
.info-card::before{
  content:"";position:absolute;inset:0;
  background-image:
    linear-gradient(rgba(255,255,255,.04) 1px,transparent 1px),
    linear-gradient(90deg,rgba(255,255,255,.04) 1px,transparent 1px);
  background-size:44px 44px;
  -webkit-mask-image:radial-gradient(ellipse at 100% 0%,#000,transparent 75%);
  mask-image:radial-gradient(ellipse at 100% 0%,#000,transparent 75%);
}
.info-card > *{position:relative;}
.info-card h3{
  font-family:var(--font-mincho);font-size:22px;letter-spacing:.12em;margin-bottom:30px;
  display:flex;align-items:center;gap:14px;
}
.info-card h3::before{content:"";width:10px;height:10px;background:var(--gold);transform:rotate(45deg);}
.info-row{padding:18px 0;border-bottom:1px solid var(--line-dark);}
.info-row:last-child{border-bottom:0;}
.info-row .lbl{font-size:11px;letter-spacing:.34em;color:var(--gold);margin-bottom:6px;text-transform:uppercase;}
.info-row .val{font-size:15px;line-height:1.9;}
.info-row .val a:hover{color:var(--gold-light);}

.form-card{background:#fff;border:1px solid var(--line);padding:48px 44px;}
.form-card h3{
  font-family:var(--font-mincho);font-size:22px;letter-spacing:.12em;color:var(--ink);margin-bottom:8px;
}
.form-note{font-size:13px;color:var(--muted);margin-bottom:30px;}
.form-grid{display:grid;grid-template-columns:1fr 1fr;gap:20px;}
.form-field{display:flex;flex-direction:column;gap:8px;}
.form-field.full{grid-column:1/-1;}
.form-field label{font-size:13px;font-weight:600;letter-spacing:.1em;color:var(--ink);}
.form-field label .req{
  color:#fff;background:var(--gold-dark);font-size:10px;padding:2px 8px;
  margin-left:8px;letter-spacing:.1em;border-radius:2px;vertical-align:1px;
}
.form-field input,.form-field textarea{
  border:1px solid var(--line);background:var(--paper);padding:14px 16px;
  font-family:var(--font-sans);font-size:14.5px;color:var(--text);
  transition:border-color .3s,background .3s;border-radius:2px;resize:vertical;
}
.form-field input:focus,.form-field textarea:focus{
  outline:none;border-color:var(--gold);background:#fff;
}
.form-actions{grid-column:1/-1;margin-top:8px;}

/* =========================================================
   FOOTER
   ========================================================= */
.site-footer{background:var(--ink);color:rgba(255,255,255,.75);position:relative;overflow:hidden;}
.site-footer::before{
  content:"";position:absolute;inset:0;
  background-image:
    linear-gradient(rgba(255,255,255,.03) 1px,transparent 1px),
    linear-gradient(90deg,rgba(255,255,255,.03) 1px,transparent 1px);
  background-size:58px 58px;
  -webkit-mask-image:radial-gradient(ellipse at 15% 0%,#000,transparent 70%);
  mask-image:radial-gradient(ellipse at 15% 0%,#000,transparent 70%);
}
.footer-main{
  position:relative;display:grid;grid-template-columns:1.3fr .7fr 1fr;
  gap:56px;padding:80px 0 60px;
}
.f-brand .brand-jp{font-size:23px;}
.f-brand p{font-size:13.5px;color:rgba(255,255,255,.55);margin-top:20px;line-height:2.1;max-width:360px;}
.f-title{
  font-size:12px;letter-spacing:.36em;color:var(--gold);text-transform:uppercase;
  font-weight:700;margin-bottom:24px;
}
.f-links li{margin-bottom:12px;}
.f-links a{font-size:13.5px;color:rgba(255,255,255,.7);transition:color .3s,padding-left .3s;position:relative;}
.f-links a::before{
  content:"—";color:var(--gold);margin-right:10px;font-size:11px;opacity:0;transition:opacity .3s;
}
.f-links a:hover{color:#fff;padding-left:4px;}
.f-links a:hover::before{opacity:1;}
.f-contact li{
  display:flex;gap:14px;font-size:13.5px;margin-bottom:16px;line-height:1.8;
  color:rgba(255,255,255,.7);
}
.f-contact .lbl{color:var(--gold);font-size:11px;letter-spacing:.2em;flex:0 0 52px;padding-top:2px;}
.footer-bottom{
  position:relative;border-top:1px solid var(--line-dark);padding:26px 0;
  display:flex;align-items:center;justify-content:space-between;gap:16px;flex-wrap:wrap;
}
.footer-bottom p{margin:0;font-size:12px;color:rgba(255,255,255,.4);letter-spacing:.14em;}
.f-lang{display:flex;gap:12px;align-items:center;}
.f-lang img{width:26px;opacity:.75;transition:opacity .3s;}
.f-lang img:hover{opacity:1;}
.f-lang .lang-switch{
  display:inline-flex;align-items:center;gap:10px;font-size:12px;letter-spacing:.18em;
  color:rgba(255,255,255,.7);padding:6px 14px;border:1px solid var(--line-dark);
  border-radius:2px;transition:all .3s ease;
}
.f-lang .lang-switch:hover{color:var(--gold-light);border-color:var(--gold);background:rgba(201,161,94,.1);}

/* ---------- Back to top ---------- */
.to-top{
  position:fixed;right:30px;bottom:30px;z-index:900;width:48px;height:48px;
  background:var(--gold);color:#fff;display:flex;align-items:center;justify-content:center;
  border-radius:2px;box-shadow:0 12px 30px rgba(168,129,63,.4);
  opacity:0;visibility:hidden;transform:translateY(14px);transition:all .4s ease;
  font-size:16px;
}
.to-top.show{opacity:1;visibility:visible;transform:translateY(0);}
.to-top:hover{background:var(--gold-dark);}

/* ---------- Reveal animation ---------- */
.reveal{opacity:0;transform:translateY(36px);transition:opacity .9s ease,transform .9s ease;}
.reveal.in{opacity:1;transform:none;}
.reveal-d1{transition-delay:.12s;}
.reveal-d2{transition-delay:.24s;}
.reveal-d3{transition-delay:.36s;}

/* =========================================================
   RESPONSIVE
   ========================================================= */
@media (max-width:1080px){
  .intro-grid{grid-template-columns:1fr;gap:24px;}
  .intro-visual{max-width:540px;margin:24px 26px 64px 0;}
  .hero-inner{flex-direction:column;align-items:flex-start;gap:48px;}
  .hero-text{max-width:100%;}
  .hero-side{flex-direction:row-reverse;align-items:center;gap:20px;padding-bottom:0;}
  .hero-vert{writing-mode:horizontal-tb;letter-spacing:.4em;}
  .svc-grid{grid-template-columns:repeat(2,1fr);}
  .flow-steps{grid-template-columns:repeat(3,1fr);gap:34px 16px;}
  .flow-line{display:none;}
  .fields-grid{grid-template-columns:1fr;gap:48px;}
  .contact-grid{grid-template-columns:1fr;}
  .footer-main{grid-template-columns:1fr 1fr;}
}
@media (max-width:760px){
  .sec{padding:76px 0;}
  .main-nav{
    position:fixed;inset:0;background:rgba(10,20,32,.98);
    -webkit-backdrop-filter:blur(14px);backdrop-filter:blur(14px);
    display:flex;align-items:center;justify-content:center;
    opacity:0;visibility:hidden;transition:all .4s ease;z-index:1050;
  }
  .main-nav.open{opacity:1;visibility:visible;}
  .main-nav ul{flex-direction:column;gap:8px;text-align:center;}
  .main-nav a{font-size:17px;padding:13px 30px;}
  .drop{
    position:static;opacity:1;visibility:visible;transform:none;
    background:transparent;box-shadow:none;border-top:0;padding:0;
    min-width:0;
  }
  .drop a{color:rgba(255,255,255,.6) !important;font-size:14px;padding:8px 30px;border-left:0;}
  .drop a:hover{background:transparent;padding-left:30px;color:var(--gold-light) !important;}
  .nav-toggle{display:flex;}
  .pillars{grid-template-columns:1fr;}
  .svc-grid{grid-template-columns:1fr;}
  .support-grid{grid-template-columns:repeat(2,1fr);}
  .company-table th,.company-table td{display:block;width:100%;padding:14px 18px;}
  .company-table th{width:100%;}
  .flow-steps{grid-template-columns:repeat(2,1fr);}
  .footer-main{grid-template-columns:1fr;gap:40px;padding:60px 0 44px;}
  .hero{padding:120px 0 90px;min-height:auto;}
  .hero-photo{object-position:66% center;}
  .hero-side{gap:14px;}
  .hero-badge{white-space:nowrap;padding:14px 20px;letter-spacing:.14em;}
  .hero-sub{letter-spacing:.04em;}
  .form-grid{grid-template-columns:1fr;}
  .form-card,.info-card{padding:34px 26px;}
  .news-item{flex-direction:column;gap:4px;}
  .brand-jp{font-size:17px;}
  .brand-en{font-size:8px;}
  .to-top{right:18px;bottom:18px;}
  .scroll-hint{display:none;}
}