:root{
  --bg:#f7f3ed;
  --paper:#fffdf9;
  --paper-soft:#fbf7f1;
  --ink:#20242b;
  --muted:#616973;
  --line:#e8dfd2;
  --accent:#8f735d;
  --accent-dark:#735843;
  --accent-soft:#f2e7de;
  --green:#899b88;
  --shadow-sm:0 10px 24px rgba(52,55,60,.05);
  --shadow-md:0 18px 42px rgba(52,55,60,.08);
  --radius-xl:30px;
  --radius-lg:22px;
  --radius-md:16px;
  --container:1140px;
  --body-font:"Hiragino Sans","Yu Gothic","Meiryo",sans-serif;
  --display-font:"Hiragino Mincho ProN","Yu Mincho","Hiragino Mincho Pro","MS PMincho",serif;
  --button-font:"Hiragino Kaku Gothic ProN","Yu Gothic","Meiryo",sans-serif;
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{
  margin:0;
  background:
    radial-gradient(circle at 100% 0%, rgba(143,115,93,.12), transparent 22%),
    radial-gradient(circle at 0% 40%, rgba(137,155,136,.06), transparent 18%),
    var(--bg);
  color:var(--ink);
  font-family:var(--body-font);
  font-size:16px;
  line-height:1.8;
  -webkit-font-smoothing:antialiased;
  text-rendering:optimizeLegibility;
}
img{max-width:100%;display:block}
a{color:inherit;text-decoration:none}
.container{width:min(calc(100% - 34px), var(--container));margin:0 auto}
.section{padding:82px 0}
.section-sm{padding:54px 0}
.grid{display:grid;gap:24px}
.grid.two{grid-template-columns:repeat(2,minmax(0,1fr))}
.grid.three{grid-template-columns:repeat(3,minmax(0,1fr))}
.grid.four{grid-template-columns:repeat(4,minmax(0,1fr))}
h1,h2,h3,h4{margin:0 0 14px;color:var(--ink)}
h1,h2,.display{font-family:var(--display-font);letter-spacing:.02em}
h1{font-size:clamp(40px,5.4vw,62px);line-height:1.16}
h2{font-size:clamp(30px,4vw,42px);line-height:1.28}
h3{font-family:var(--body-font);font-size:19px;line-height:1.52}
p{margin:0 0 14px;color:var(--muted)}
.lead{font-size:18px;line-height:1.9;color:#4d5560}
.small{font-size:14px;color:#7a746c}
.kicker{
  display:inline-flex;align-items:center;gap:10px;
  padding:8px 14px;border-radius:999px;
  background:rgba(255,255,255,.85);
  border:1px solid rgba(143,115,93,.14);
  color:var(--accent-dark);
  font-size:12px;font-weight:700;letter-spacing:.08em;
}
.kicker::before{content:"";width:7px;height:7px;border-radius:50%;background:var(--green)}
.badge{
  display:inline-flex;align-items:center;gap:8px;
  padding:7px 11px;border-radius:999px;
  background:var(--accent-soft);
  border:1px solid #ead9cb;
  color:var(--accent-dark);
  font-size:12px;font-weight:700;
}
.btn-row{display:flex;flex-wrap:wrap;gap:12px}
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  min-height:46px;padding:0 18px;border-radius:999px;border:1px solid transparent;
  font-family:var(--button-font);font-size:14px;font-weight:700;line-height:1;
  transition:.22s ease;box-shadow:var(--shadow-sm);white-space:nowrap;
}
.btn:hover{transform:translateY(-1px)}
.btn-primary{background:linear-gradient(135deg,var(--accent-dark),var(--accent));color:#fff}
.btn-secondary{background:#fff;border-color:var(--line);color:#334352}
.btn-outline{background:transparent;border-color:rgba(255,255,255,.34);color:#fff}
.arrow::after{content:"→";font-size:16px}

.site-header{
  position:sticky;top:0;z-index:50;
  background:rgba(247,243,237,.92);
  backdrop-filter:blur(16px);
  border-bottom:1px solid rgba(231,223,210,.92);
}
.header-inner{display:flex;align-items:center;justify-content:space-between;gap:16px;min-height:68px}
.brand{display:flex;align-items:center;gap:12px;font-size:16px;font-weight:700;color:#38424d}
.brand-mark{
  width:36px;height:36px;border-radius:12px;display:grid;place-items:center;
  background:linear-gradient(135deg,var(--accent-dark),var(--accent));color:#fff;
  font-family:var(--display-font);font-size:16px;box-shadow:var(--shadow-sm);
}
.header-nav{display:flex;align-items:center;gap:20px}
.header-nav a{font-family:var(--button-font);font-size:14px;color:#5a6470}
.header-nav a.active,.header-nav a:hover{color:var(--accent-dark)}
.header-actions{display:flex;align-items:center;gap:10px}
.menu-toggle{
  display:none;width:42px;height:42px;border-radius:12px;border:1px solid var(--line);
  background:#fff;align-items:center;justify-content:center;cursor:pointer;position:relative;box-shadow:var(--shadow-sm)
}
.menu-toggle span,.menu-toggle::before,.menu-toggle::after{
  content:"";display:block;width:18px;height:2px;background:#4c5865;border-radius:2px;position:absolute;transition:.24s ease
}
.menu-toggle::before{transform:translateY(-6px)}
.menu-toggle::after{transform:translateY(6px)}
.mobile-menu{display:none;border-top:1px solid rgba(231,223,210,.92);background:rgba(247,243,237,.96)}
.mobile-menu.open{display:block}
.mobile-menu .inner{padding:14px 0 18px;display:grid;gap:10px}
.mobile-menu a{
  background:#fff;border:1px solid var(--line);border-radius:14px;padding:13px 14px;
  color:#324252;font-weight:700;font-size:14px;box-shadow:var(--shadow-sm)
}

.hero{padding:34px 0 62px}
.hero-grid{display:grid;grid-template-columns:1.08fr .92fr;gap:40px;align-items:center}
.hero-copy{padding:10px 0}
.hero-copy .lead{max-width:62ch}
.pill-row{display:flex;flex-wrap:wrap;gap:10px;margin-top:20px}
.pill{padding:9px 13px;border-radius:999px;background:#fff;border:1px solid var(--line);font-size:13px;color:#5c6570}
.hero-stage{
  background:linear-gradient(180deg,#fbfaf7,#f2ebe1);
  border:1px solid rgba(231,223,210,.94);
  border-radius:28px;padding:18px;box-shadow:var(--shadow-md)
}
.stage-grid{display:grid;grid-template-columns:1.02fr .88fr;gap:16px}
.panel{
  background:#fff;border:1px solid rgba(231,223,210,.94);border-radius:20px;padding:16px;
  box-shadow:0 8px 16px rgba(52,55,60,.03)
}
.hero-main{display:flex;flex-direction:column;justify-content:space-between;min-height:380px}
.hero-main img{height:240px;object-fit:contain}
.stage-side{display:grid;gap:16px}
.section-head{display:flex;justify-content:space-between;align-items:end;gap:20px;margin-bottom:26px}
.section-head p{max-width:58ch}
.card{
  background:#fff;border:1px solid var(--line);border-radius:24px;padding:24px;box-shadow:var(--shadow-md)
}
.card.soft{background:linear-gradient(180deg,#fff,#faf6ef)}
.mini-card,.guide-card,.faq-card,.voice-card{min-height:180px;display:flex;flex-direction:column;justify-content:space-between}
.product-card{
  display:grid;grid-template-columns:300px 1fr;background:#fff;border:1px solid var(--line);border-radius:26px;overflow:hidden;box-shadow:var(--shadow-md)
}
.product-media{background:linear-gradient(180deg,#faf7f1,#f1ebdf);padding:22px;display:grid;place-items:center}
.product-media img{max-height:240px;object-fit:contain}
.product-body{padding:24px;display:flex;flex-direction:column;justify-content:space-between}
.product-body h3{font-family:var(--display-font);font-size:32px;line-height:1.32;margin-top:12px}
.points{display:grid;grid-template-columns:1fr 1fr;gap:8px 18px;margin:18px 0 0;padding:0}
.points li{list-style:none;position:relative;padding-left:16px;font-size:15px;color:#4d5864}
.points li::before{content:"";position:absolute;left:0;top:10px;width:6px;height:6px;border-radius:50%;background:var(--accent)}
.split{display:grid;grid-template-columns:.9fr 1.1fr;gap:24px;align-items:stretch}
.split-media{min-height:360px;border-radius:26px;overflow:hidden;border:1px solid var(--line);box-shadow:var(--shadow-md)}
.split-media img{width:100%;height:100%;object-fit:cover}
.split-panel{
  background:linear-gradient(180deg,#fff,#f8f4ec);border:1px solid var(--line);border-radius:26px;padding:28px;box-shadow:var(--shadow-md)
}
.steps{display:grid;gap:14px}
.step{
  display:grid;grid-template-columns:54px 1fr;gap:14px;align-items:start;background:#fff;border:1px solid var(--line);border-radius:18px;padding:14px
}
.step .num{
  width:40px;height:40px;border-radius:50%;display:grid;place-items:center;
  background:var(--accent-soft);color:var(--accent-dark);font-weight:700
}
.usage-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:16px}
.usage-card{background:#fff;border:1px solid var(--line);border-radius:20px;overflow:hidden;box-shadow:var(--shadow-sm)}
.usage-card img{width:100%;height:200px;object-fit:cover}
.usage-card .body{padding:16px}
.faq-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:16px}
.cta-panel{
  background:linear-gradient(135deg,#7b624f,#927660 64%,#a68871);
  color:#fff;border-radius:28px;padding:28px;box-shadow:0 18px 38px rgba(115,88,67,.18)
}
.cta-panel p{color:rgba(255,255,255,.86)}
.cta-grid{display:grid;grid-template-columns:1.04fr .96fr;gap:20px;align-items:center}
.cta-list{display:grid;gap:10px}
.cta-row{
  display:flex;justify-content:space-between;align-items:center;gap:12px;
  background:rgba(255,255,255,.08);border:1px solid rgba(255,255,255,.16);
  padding:12px 14px;border-radius:14px
}
.cta-row strong{font-size:15px}
.page-hero{padding:28px 0 20px}
.page-hero .inner{
  background:linear-gradient(180deg,#fbfaf7,#f2ece2);
  border:1px solid rgba(231,223,210,.94);border-radius:24px;padding:24px;box-shadow:var(--shadow-md)
}
.breadcrumbs{display:flex;gap:10px;flex-wrap:wrap;font-size:13px;color:#7b756d;margin-bottom:14px}
.site-footer{margin-top:62px;padding:24px 0 28px;border-top:1px solid rgba(231,223,210,.92)}
.footer-main{display:flex;justify-content:space-between;align-items:flex-start;gap:18px}
.footer-brand{max-width:360px}
.footer-brand strong{display:block;font-family:var(--display-font);font-size:22px;margin-bottom:10px}
.footer-mini-nav{display:flex;flex-wrap:wrap;gap:8px 14px;font-size:13px;color:#5a6674}
.footer-mini-nav a:hover{color:var(--accent-dark)}
.copy{margin-top:16px;padding-top:16px;border-top:1px solid rgba(231,223,210,.92);font-size:13px;color:#7c766f}
.fade-up{opacity:0;transform:translateY(18px);transition:.72s ease}
.fade-up.in{opacity:1;transform:none}
@media (max-width:1024px){
  .grid.three,.grid.four,.faq-grid,.usage-grid{grid-template-columns:1fr 1fr}
  .hero-grid,.split,.cta-grid,.product-card,.grid.two{grid-template-columns:1fr}
  .stage-grid{grid-template-columns:1fr}
}
@media (max-width:760px){
  .container{width:min(calc(100% - 18px), var(--container))}
  .section{padding:42px 0}
  .section-sm{padding:30px 0}
  .hero{padding:18px 0 32px}
  h1{font-size:32px;line-height:1.18}
  h2{font-size:26px;line-height:1.3}
  h3{font-size:18px}
  .lead{font-size:16px;line-height:1.82}
  .header-nav,.header-actions .btn{display:none}
  .menu-toggle{display:flex}
  .header-inner{min-height:60px}
  .brand{font-size:14px}
  .brand-mark{width:32px;height:32px;font-size:14px}
  .btn{min-height:42px;padding:0 16px;font-size:13px}
  .btn-row{gap:10px}
  .hero-stage,.card,.split-panel,.cta-panel,.page-hero .inner,.product-card,.split-media,.usage-card{border-radius:20px}
  .hero-stage{padding:14px}
  .panel{padding:14px}
  .hero-main{min-height:auto}
  .hero-main img{height:158px}
  .section-head{flex-direction:column;align-items:start;gap:6px;margin-bottom:18px}
  .grid.three,.grid.four,.faq-grid,.usage-grid{grid-template-columns:1fr}
  .product-card,.split,.grid.two{grid-template-columns:1fr}
  .product-media{padding:18px}
  .product-media img{max-height:170px}
  .product-body,.split-panel{padding:18px}
  .product-body h3{font-size:28px}
  .points{grid-template-columns:1fr;gap:6px;margin-top:14px}
  .step{grid-template-columns:44px 1fr}
  .step .num{width:34px;height:34px}
  .split-media{min-height:220px}
  .usage-card img{height:180px}
  .cta-panel{padding:20px}
  .cta-row strong{font-size:14px}
  .footer-main{flex-direction:column;gap:12px}
}


/* 2026 premium visual system */
body{background:linear-gradient(180deg,var(--paper-soft) 0,var(--bg) 38%,var(--paper-soft) 100%);letter-spacing:.015em}
.site-header{background:rgba(255,255,255,.84);backdrop-filter:blur(18px) saturate(1.25);-webkit-backdrop-filter:blur(18px) saturate(1.25);border-bottom:1px solid rgba(255,255,255,.7)}
.brand{gap:12px}.brand-mark{display:grid;place-items:center;width:44px;height:44px;border-radius:50%;box-shadow:0 8px 22px rgba(0,0,0,.12);font-family:var(--display-font);font-size:15px;letter-spacing:.05em}
.header-nav a{position:relative;padding:27px 3px 24px}.header-nav a::after{content:"";position:absolute;left:50%;right:50%;bottom:16px;height:2px;background:var(--accent);transition:.25s}.header-nav a:hover::after,.header-nav a.active::after{left:3px;right:3px}
.hero{position:relative;overflow:hidden;padding:58px 0 86px}.hero::before{content:"";position:absolute;width:520px;height:520px;border-radius:50%;top:-260px;right:-100px;background:var(--accent-soft);filter:blur(4px);opacity:.85}.hero::after{content:"";position:absolute;width:340px;height:340px;border:1px solid var(--line);border-radius:50%;bottom:-210px;left:-120px}
.hero-grid{position:relative;z-index:1;gap:64px}.hero-copy h1{font-size:clamp(42px,5vw,72px);line-height:1.25;letter-spacing:.04em}.hero-copy .lead{font-size:16px;line-height:2}.hero-stage{transform:rotate(1.2deg);box-shadow:0 35px 90px rgba(31,42,45,.14);border:1px solid rgba(255,255,255,.9)}
.panel,.card,.product-card,.use-card,.shop-card{border:1px solid rgba(255,255,255,.9);box-shadow:0 16px 48px rgba(31,42,45,.075);transition:transform .35s ease,box-shadow .35s ease}.card:hover,.product-card:hover,.use-card:hover,.shop-card:hover{transform:translateY(-6px);box-shadow:0 24px 65px rgba(31,42,45,.13)}
.section{padding:110px 0}.section-sm{padding:72px 0}.section-head{margin-bottom:48px}.section-head h2,.split-panel h2,.page-hero h1{font-size:clamp(32px,4vw,52px);line-height:1.38}.kicker{letter-spacing:.18em;text-transform:uppercase}.btn{min-height:48px;padding:13px 22px;border-radius:999px;box-shadow:none}.btn-primary{box-shadow:0 10px 25px color-mix(in srgb,var(--accent) 24%,transparent)}
.product-media{background:radial-gradient(circle at 50% 42%,#fff 0,var(--accent-soft) 68%,transparent 69%)}
.page-hero{padding:70px 0 46px}.page-hero .inner{padding:46px 50px;background:linear-gradient(135deg,var(--paper),var(--accent-soft));border:1px solid rgba(255,255,255,.85);box-shadow:0 22px 60px rgba(31,42,45,.08)}
.site-footer--premium{position:relative;margin-top:100px;padding:78px 0 28px;border:0;background:#172725;color:rgba(255,255,255,.74);overflow:hidden}.site-footer--premium::before{content:"";position:absolute;inset:0;background:radial-gradient(circle at 8% 20%,rgba(255,255,255,.08),transparent 32%),linear-gradient(120deg,transparent 62%,rgba(255,255,255,.035));pointer-events:none}.footer-shell{position:relative}.footer__grid{display:grid;grid-template-columns:1.45fr .8fr .8fr;gap:70px;padding-bottom:58px}.footer__brand{max-width:440px}.footer-logo{display:inline-flex;align-items:center;gap:15px;color:#fff;margin-bottom:22px}.footer-logo__mark{display:grid;place-items:center;width:54px;height:54px;border:1px solid rgba(255,255,255,.35);border-radius:50%;font-family:var(--display-font);font-size:17px}.footer-logo strong{display:block;font-family:var(--display-font);font-size:25px;letter-spacing:.08em}.footer-logo small{display:block;margin-top:4px;font-size:9px;letter-spacing:.25em;color:rgba(255,255,255,.52)}.footer__brand p{line-height:1.9}.footer__heading{margin-bottom:20px;color:#fff;font-size:11px;font-weight:800;letter-spacing:.18em}.footer__links{display:grid;gap:12px}.footer__links a{color:rgba(255,255,255,.7);font-size:13px;transition:.2s}.footer__links a:hover{color:#fff;transform:translateX(3px)}.footer-cta{display:flex;align-items:center;justify-content:space-between;max-width:260px;margin-top:25px;padding:14px 18px;border:1px solid rgba(255,255,255,.26);border-radius:999px;color:#fff}.footer__bottom{display:flex;justify-content:space-between;gap:20px;padding-top:24px;border-top:1px solid rgba(255,255,255,.14);font-size:11px;color:rgba(255,255,255,.48)}
.floating-buy{position:fixed;right:24px;bottom:24px;z-index:40;display:flex;align-items:center;gap:18px;padding:14px 15px 14px 21px;border-radius:999px;background:var(--accent-dark);color:#fff;box-shadow:0 18px 45px rgba(0,0,0,.22);font-size:13px;font-weight:700}.floating-buy b{display:grid;place-items:center;width:30px;height:30px;border-radius:50%;background:rgba(255,255,255,.16)}
.brand-biopaste{--bg:#edf6f4;--paper-soft:#f7fbfa;--accent:#147d78;--accent-dark:#0b5553;--accent-soft:#dcefeb;--line:#cfe3df}.brand-biopaste .site-footer--premium{background:#0d3535}.brand-biopaste .brand-mark{background:linear-gradient(145deg,#258f88,#0d5f5b);color:#fff}.brand-biopaste .kicker{color:#0e716c}.brand-biopaste .hero-main{background:linear-gradient(150deg,#fff 0,#dff1ed 100%)}
.brand-shoukanosio{--bg:#f4efe8;--paper-soft:#fbf8f3;--accent:#a96542;--accent-dark:#603e31;--accent-soft:#efe0d2;--line:#e5d5c6}.brand-shoukanosio .site-footer--premium{background:#302722}.brand-shoukanosio .brand-mark{background:linear-gradient(145deg,#b9805c,#73513e);color:#fff}.brand-shoukanosio .kicker{color:#98603f}.brand-shoukanosio .hero-main{background:linear-gradient(150deg,#fffdfa 0,#efe0d2 100%)}
@media(max-width:900px){.footer__grid{grid-template-columns:1fr 1fr;gap:45px}.footer__brand{grid-column:1/-1}.hero-stage{transform:none}.floating-buy{right:14px;bottom:14px}.section{padding:82px 0}}
@media(max-width:620px){.footer__grid{grid-template-columns:1fr;gap:34px}.footer__brand{grid-column:auto}.footer__bottom{flex-direction:column}.site-footer--premium{padding-top:58px}.hero-copy h1{font-size:38px}.page-hero .inner{padding:34px 24px}.floating-buy span{display:none}.floating-buy{padding:10px}}
@media(prefers-reduced-motion:reduce){.hero-stage,.card,.product-card,.use-card,.shop-card{transition:none!important;transform:none!important}}

/* Review adjustment: brighten and crop/zoom the developer photo so the face and product read more clearly. */
.developer-photo img{
  transform:scale(1.22);
  transform-origin:50% 46%;
  object-position:50% 46%;
  filter:brightness(1.13) contrast(1.03);
}
@media(max-width:760px){
  .developer-photo img{transform:scale(1.18);transform-origin:50% 44%;object-position:50% 44%;}
}