/* SERYUB — global stylesheet */
:root {
  --ink: #0b0d14;
  --ink-2: #394150;
  --ink-3: #6b7280;
  --line: #e4e7ee;
  --bg: #fff;
  --bg-soft: #f4f6fa;
  --bg-dark: #070a12;
  --accent: #2f6bff;
  --accent-2: #12d6b8;
  --radius: 22px;
  --radius-sm: 14px;
  --shadow: 0 30px 60px -30px rgba(15, 30, 80, .28);
  --max: 1240px;
  --gutter: clamp(16px, 4vw, 40px);
  --font: "Inter", "Noto Sans JP", system-ui, -apple-system, "Segoe UI", sans-serif;
  --ease: cubic-bezier(.2, .7, .2, 1);
}
*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; scroll-padding-top: 80px; }
body { margin: 0; font-family: var(--font); color: var(--ink); background: var(--bg); line-height: 1.85; letter-spacing: .02em; -webkit-font-smoothing: antialiased; overflow-x: hidden; }
img { max-width: 100%; display: block; }
a { color: inherit; text-decoration: none; }
button { font: inherit; cursor: pointer; }
h1, h2, h3, h4 { margin: 0; line-height: 1.35; font-weight: 700; }
p { margin: 0; }
.wrap { width: 100%; max-width: var(--max); margin: 0 auto; padding: 0 var(--gutter); }
.eyebrow { display: inline-block; font-size: 13px; font-weight: 600; letter-spacing: .16em; text-transform: uppercase; color: var(--accent); }
.grad-text { background: linear-gradient(100deg, var(--accent) 0%, #7a5cff 50%, var(--accent-2) 100%); -webkit-background-clip: text; background-clip: text; color: transparent; }

/* buttons */
.btn { display: inline-flex; align-items: center; justify-content: center; gap: 10px; height: 50px; padding: 0 26px; border-radius: 999px; font-weight: 600; font-size: 15px; border: 1px solid transparent; transition: transform .3s var(--ease), background .3s, box-shadow .3s; white-space: nowrap; }
.btn:hover { transform: translateY(-2px); }
.btn-primary { background: var(--ink); color: #fff; box-shadow: 0 12px 30px -12px rgba(0,0,0,.5); }
.btn-accent { background: linear-gradient(100deg, var(--accent), #6a5cff); color: #fff; box-shadow: 0 14px 30px -12px rgba(47,107,255,.7); }
.btn-ghost { border-color: rgba(11,13,20,.18); background: rgba(255,255,255,.6); backdrop-filter: blur(8px); }
.btn-ghost:hover { border-color: var(--ink); }
.btn-light { background: #fff; color: var(--ink); }
.btn-outline-light { border-color: rgba(255,255,255,.35); color: #fff; }
.btn svg { width: 18px; height: 18px; }
.link-arrow { display: inline-flex; gap: 6px; font-weight: 600; color: var(--accent); }
.link-arrow::after { content: "→"; transition: transform .3s var(--ease); }
a:hover > .link-arrow::after, .link-arrow:hover::after { transform: translateX(4px); }

/* header */
.site-header { position: fixed; inset: 0 0 auto 0; z-index: 50; transition: background .4s, box-shadow .4s; }
.site-header.scrolled, .site-header.solid { background: rgba(255,255,255,.8); backdrop-filter: saturate(180%) blur(18px); -webkit-backdrop-filter: saturate(180%) blur(18px); box-shadow: 0 1px 0 rgba(0,0,0,.06); }
.nav { display: flex; align-items: center; justify-content: space-between; height: 68px; gap: 24px; }
.logo { display: inline-flex; align-items: center; gap: 10px; font-weight: 800; font-size: 19px; letter-spacing: .16em; }
.logo img { width: 30px; height: 30px; }
.nav-links { display: flex; gap: 30px; font-size: 14px; font-weight: 500; }
.nav-links a { opacity: .78; transition: opacity .2s; }
.nav-links a:hover { opacity: 1; }
.nav-right { display: flex; align-items: center; gap: 12px; }
.nav-cta { height: 38px; padding: 0 18px; font-size: 13px; }
.menu-btn { display: none; width: 42px; height: 42px; border: 0; background: none; color: inherit; padding: 0; }
.menu-btn span { display: block; width: 20px; height: 1.6px; background: currentColor; margin: 5px auto; }
.mobile-nav { position: fixed; inset: 68px 0 auto 0; background: rgba(255,255,255,.97); backdrop-filter: blur(16px); padding: 12px var(--gutter) 28px; display: none; flex-direction: column; z-index: 49; box-shadow: 0 20px 40px -20px rgba(0,0,0,.25); }
.mobile-nav a { padding: 14px 0; border-bottom: 1px solid var(--line); font-weight: 600; }
.mobile-nav .btn { margin-top: 18px; border-bottom: 0; color: #fff; }
.mobile-nav.open { display: flex; }

/* hero */
.hero { position: relative; overflow: hidden; padding: 140px 0 60px; background: radial-gradient(1200px 600px at 85% 10%, rgba(47,107,255,.15), transparent 60%), radial-gradient(900px 500px at 10% 90%, rgba(18,214,184,.13), transparent 60%), linear-gradient(180deg, #fbfcff 0%, #f1f4fa 100%); }
.hero-grid { display: grid; grid-template-columns: 1.02fr 1fr; align-items: center; gap: 40px; }
.hero h1 { font-size: clamp(30px, 4.2vw, 56px); font-weight: 800; margin: 18px 0 22px; line-height: 1.3; }
.nb { white-space: nowrap; }
.hero .lead { font-size: clamp(16px, 1.5vw, 19px); color: var(--ink-2); max-width: 540px; }
.hero-actions { display: flex; flex-wrap: wrap; gap: 12px; margin-top: 34px; }
.hero-visual { position: relative; }
.hero-visual img.product-shot { width: 100%; aspect-ratio: 5 / 4; object-fit: contain; border-radius: 28px; mix-blend-mode: multiply; animation: float 7s ease-in-out infinite; }
.hero-carousel { position: relative; touch-action: pan-y; }
.slides { display: grid; }
.slide { grid-area: 1 / 1; position: relative; pointer-events: none; opacity: 0; visibility: hidden; transform: translateX(24px); transition: opacity .7s var(--ease), transform .7s var(--ease), visibility 0s .7s; }
.slide.is-active { pointer-events: auto; opacity: 1; visibility: visible; transform: none; transition: opacity .7s var(--ease), transform .7s var(--ease); }
.slide .float-chip .link-arrow { display: flex; margin-top: 4px; font-size: 12px; }
.car-btn { position: absolute; top: 45%; width: 42px; height: 42px; border-radius: 50%; border: 1px solid var(--line); background: rgba(255,255,255,.85); backdrop-filter: blur(8px); font-size: 22px; line-height: 1; color: var(--ink); box-shadow: var(--shadow); opacity: 0; transition: opacity .3s; z-index: 2; }
.car-prev { left: -8px; } .car-next { right: -8px; }
.hero-carousel:hover .car-btn, .car-btn:focus-visible { opacity: 1; }
.car-dots { display: flex; justify-content: center; gap: 8px; margin-top: 18px; }
.car-dots button { width: 8px; height: 8px; padding: 0; border: 0; border-radius: 999px; background: rgba(11,13,20,.2); transition: width .4s var(--ease), background .4s; }
.car-dots button.active { width: 28px; background: var(--accent); }
@media (hover: none) { .car-btn { opacity: 1; } }
@media (max-width: 600px) { .car-btn { display: none; } }
.float-chip { position: absolute; background: rgba(255,255,255,.85); backdrop-filter: blur(12px); border: 1px solid rgba(255,255,255,.9); border-radius: 16px; padding: 12px 16px; box-shadow: var(--shadow); font-size: 13px; line-height: 1.5; }
.float-chip b { display: block; font-size: 18px; }
.float-chip.c1 { left: -2%; top: 14%; animation: float 6s ease-in-out infinite reverse; }
.float-chip.c2 { right: 0; bottom: 12%; animation: float 8s ease-in-out infinite; }
@keyframes float { 0%,100% { transform: translateY(0); } 50% { transform: translateY(-12px); } }
.hero-stats { display: grid; grid-template-columns: repeat(4, 1fr); gap: 1px; margin-top: 70px; background: var(--line); border-radius: var(--radius); overflow: hidden; border: 1px solid var(--line); }
.hero-stats div { background: rgba(255,255,255,.88); padding: 22px 24px; }
.hero-stats b { display: block; font-size: 22px; }
.hero-stats span { font-size: 13px; color: var(--ink-3); }

/* marquee */
.marquee { background: var(--ink); color: #fff; overflow: hidden; padding: 18px 0; }
.marquee-track { display: flex; gap: 56px; width: max-content; animation: marquee 38s linear infinite; font-weight: 600; font-size: 15px; }
.marquee-track span { display: inline-flex; align-items: center; gap: 56px; }
.marquee-track span::after { content: "✦"; color: var(--accent-2); }
@keyframes marquee { to { transform: translateX(-50%); } }

/* sections */
.section { padding: clamp(80px, 11vw, 140px) 0; position: relative; }
.section-soft { background: var(--bg-soft); }
.section-head { max-width: 760px; margin-bottom: 56px; }
.section-head.center { margin-left: auto; margin-right: auto; text-align: center; }
.section-head h2 { font-size: clamp(28px, 3.6vw, 46px); margin-top: 14px; }
.section-head p { margin-top: 18px; color: var(--ink-2); font-size: 17px; }

/* cards */
.lineup { display: grid; grid-template-columns: repeat(auto-fit, minmax(270px, 1fr)); gap: 22px; }
.card { display: flex; flex-direction: column; background: #fff; border-radius: var(--radius); overflow: hidden; border: 1px solid var(--line); transition: transform .5s var(--ease), box-shadow .5s var(--ease); }
.card:hover { transform: translateY(-6px); box-shadow: var(--shadow); }
.card-media { aspect-ratio: 1; background: #fff; display: grid; place-items: center; padding: 18px; }
.card-media img { width: 100%; height: 100%; object-fit: contain; transition: transform .7s var(--ease); }
.card:hover .card-media img { transform: scale(1.05); }
.card-body { display: flex; flex-direction: column; gap: 10px; padding: 8px 24px 24px; flex: 1; }
.card-series { font-size: 12px; font-weight: 700; letter-spacing: .14em; text-transform: uppercase; color: var(--accent); }
.card h3 { font-size: 22px; }
.card p { color: var(--ink-2); font-size: 14px; }
.chips { display: flex; flex-wrap: wrap; gap: 6px; }
.chip { font-size: 12px; padding: 3px 10px; border-radius: 999px; background: var(--bg-soft); color: var(--ink-2); }
.card-foot { margin-top: auto; padding-top: 14px; display: flex; align-items: flex-end; justify-content: space-between; gap: 10px; border-top: 1px solid var(--line); }
.price { font-size: 22px; font-weight: 800; letter-spacing: 0; }
.price small { display: block; font-size: 11px; font-weight: 500; color: var(--ink-3); }
.price-na { font-size: 14px; font-weight: 600; color: var(--ink-2); }

/* dark showcase */
.showcase-dark { background: var(--bg-dark); color: #fff; overflow: hidden; }
.showcase-dark .section-head p { color: rgba(255,255,255,.7); }
.glow { position: absolute; border-radius: 50%; filter: blur(90px); opacity: .5; pointer-events: none; }
.glow.g1 { width: 480px; height: 480px; background: var(--accent); top: -120px; right: -80px; }
.glow.g2 { width: 420px; height: 420px; background: var(--accent-2); bottom: -140px; left: -100px; opacity: .3; }
.showcase-banner { border-radius: var(--radius); overflow: hidden; border: 1px solid rgba(255,255,255,.1); }
.showcase-banner img { width: 100%; }
.stat-row { display: grid; grid-template-columns: repeat(4, 1fr); gap: 20px; margin-top: 40px; }
.stat-row div { padding: 24px; border-radius: var(--radius-sm); background: rgba(255,255,255,.06); border: 1px solid rgba(255,255,255,.1); }
.stat-row b { display: block; font-size: 26px; background: linear-gradient(100deg, #fff, var(--accent-2)); -webkit-background-clip: text; background-clip: text; color: transparent; }
.stat-row span { font-size: 13px; color: rgba(255,255,255,.65); }

/* compare */
.table-scroll { overflow-x: auto; border-radius: var(--radius); border: 1px solid var(--line); background: #fff; }
.compare { width: 100%; min-width: 760px; border-collapse: collapse; font-size: 14px; }
.compare th, .compare td { padding: 16px 20px; text-align: left; border-bottom: 1px solid var(--line); vertical-align: top; }
.compare thead th { background: var(--bg-soft); font-size: 16px; }
.compare tbody th { color: var(--ink-3); font-weight: 600; white-space: nowrap; width: 150px; }
.compare tr:last-child > * { border-bottom: 0; }

/* brand / values */
.values { display: grid; grid-template-columns: repeat(auto-fit, minmax(240px, 1fr)); gap: 22px; }
.value { padding: 30px; border-radius: var(--radius); background: #fff; border: 1px solid var(--line); }
.value i { display: grid; place-items: center; width: 46px; height: 46px; border-radius: 14px; background: linear-gradient(135deg, rgba(47,107,255,.14), rgba(18,214,184,.18)); color: var(--accent); margin-bottom: 18px; font-style: normal; font-weight: 800; }
.value h3 { font-size: 18px; margin-bottom: 8px; }
.value p { color: var(--ink-2); font-size: 14px; }

/* faq */
.faq { max-width: 860px; margin: 0 auto; }
.faq details { border-bottom: 1px solid var(--line); padding: 20px 0; }
.faq summary { cursor: pointer; font-weight: 600; list-style: none; display: flex; justify-content: space-between; gap: 16px; }
.faq summary::after { content: "+"; font-size: 22px; line-height: 1; color: var(--accent); }
.faq details[open] summary::after { content: "−"; }
.faq details p { margin-top: 12px; color: var(--ink-2); font-size: 15px; }

/* cta */
.cta { background: linear-gradient(120deg, #0b1230, #0e2a4a 60%, #0b3a3a); color: #fff; border-radius: 32px; padding: clamp(40px, 6vw, 80px); text-align: center; position: relative; overflow: hidden; }
.cta h2 { font-size: clamp(26px, 3.4vw, 42px); }
.cta p { margin: 16px auto 32px; max-width: 560px; color: rgba(255,255,255,.75); }
.cta-actions { display: flex; flex-wrap: wrap; gap: 12px; justify-content: center; }

/* footer */
.site-footer { background: var(--bg-dark); color: rgba(255,255,255,.7); padding: 60px 0 36px; font-size: 14px; }
.foot-grid { display: grid; grid-template-columns: 1.4fr 1fr 1fr; gap: 40px; }
.site-footer .logo { color: #fff; }
.site-footer h4 { color: #fff; font-size: 14px; margin-bottom: 14px; }
.site-footer ul { list-style: none; margin: 0; padding: 0; display: grid; gap: 8px; }
.site-footer a:hover { color: #fff; }
.copy { margin-top: 40px; padding-top: 24px; border-top: 1px solid rgba(255,255,255,.1); font-size: 12px; }

/* product page */
.crumbs { padding-top: 96px; font-size: 13px; color: var(--ink-3); }
.crumbs a:hover { color: var(--ink); }
.pdp { display: grid; grid-template-columns: 1.1fr 1fr; gap: clamp(28px, 4vw, 64px); padding-block: 24px 60px; align-items: start; }
.gallery { position: sticky; top: 90px; }
.gallery-main { aspect-ratio: 1; border-radius: var(--radius); border: 1px solid var(--line); background: #fff; display: grid; place-items: center; padding: 20px; }
.gallery-main img { width: 100%; height: 100%; object-fit: contain; transition: opacity .2s; }
.thumbs { display: grid; grid-template-columns: repeat(auto-fill, minmax(64px, 1fr)); gap: 10px; margin-top: 12px; }
.thumbs button { aspect-ratio: 1; padding: 4px; border-radius: 12px; border: 1px solid var(--line); background: #fff; }
.thumbs button.active { border-color: var(--accent); box-shadow: 0 0 0 2px rgba(47,107,255,.25); }
.thumbs img { width: 100%; height: 100%; object-fit: contain; }
.pdp-info h1 { font-size: clamp(28px, 3.4vw, 42px); margin: 10px 0 12px; }
.pdp-info .lead { color: var(--ink-2); }
.pdp-price { margin: 24px 0 6px; font-size: 36px; font-weight: 800; letter-spacing: 0; }
.pdp-note { font-size: 12px; color: var(--ink-3); }
.opt-label { margin: 26px 0 10px; font-size: 13px; font-weight: 600; color: var(--ink-3); }
.variant-list { display: flex; flex-wrap: wrap; gap: 10px; }
.variant-list button { padding: 10px 18px; border-radius: 14px; border: 1px solid var(--line); background: #fff; font-weight: 600; font-size: 14px; }
.variant-list button.active { border-color: var(--accent); background: rgba(47,107,255,.06); color: var(--accent); }
.buy-row { display: flex; flex-wrap: wrap; gap: 12px; margin-top: 30px; }
.trust { display: grid; grid-template-columns: repeat(3, 1fr); gap: 10px; margin-top: 28px; }
.trust div { padding: 14px; border-radius: var(--radius-sm); background: var(--bg-soft); font-size: 12px; color: var(--ink-2); line-height: 1.5; }
.trust b { display: block; font-size: 14px; color: var(--ink); }
.hl-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 16px; }
.hl-grid div { padding: 24px; border-radius: var(--radius-sm); background: var(--bg-soft); }
.hl-grid b { display: block; font-size: 24px; }
.hl-grid span { font-size: 13px; color: var(--ink-3); }
.bullets { display: grid; gap: 14px; max-width: 900px; }
.bullets li { list-style: none; padding: 18px 22px; border-radius: var(--radius-sm); background: #fff; border: 1px solid var(--line); font-size: 15px; color: var(--ink-2); }
.bullets b { display: block; color: var(--ink); margin-bottom: 4px; }
.bullets { padding: 0; margin: 0; }
.banner-stack { display: grid; gap: 16px; }
.banner-stack img { width: 100%; border-radius: var(--radius-sm); }
.spec-table { width: 100%; border-collapse: collapse; background: #fff; border-radius: var(--radius); overflow: hidden; border: 1px solid var(--line); }
.spec-table th, .spec-table td { padding: 16px 22px; text-align: left; border-bottom: 1px solid var(--line); font-size: 14px; vertical-align: top; }
.spec-table th { width: 200px; background: var(--bg-soft); color: var(--ink-3); font-weight: 600; }
.spec-table tr:last-child > * { border-bottom: 0; }
.sub-title { font-size: clamp(22px, 2.6vw, 30px); margin-bottom: 28px; }
.pdp-block { padding-block: 50px; }
.sticky-buy { display: none; }

/* reveal */
.js .reveal { opacity: 0; transform: translateY(26px); transition: opacity .9s var(--ease), transform .9s var(--ease); }
.js .reveal.in { opacity: 1; transform: none; }
.d1 { transition-delay: .1s !important; } .d2 { transition-delay: .2s !important; } .d3 { transition-delay: .3s !important; }

@media (max-width: 900px) {
  .nav-links, .nav-cta { display: none; }
  .menu-btn { display: block; }
  .hero { padding-top: 110px; }
  .hero-grid, .pdp { grid-template-columns: 1fr; }
  .gallery { position: static; }
  .hero-stats, .stat-row, .hl-grid { grid-template-columns: repeat(2, 1fr); }
  .foot-grid { grid-template-columns: 1fr; }
  .trust { grid-template-columns: 1fr; }
  .spec-table th { width: 120px; padding: 14px; }
  .spec-table td { padding: 14px; }
  .sticky-buy { display: flex; position: fixed; inset: auto 0 0 0; z-index: 40; gap: 12px; align-items: center; justify-content: space-between; padding: 12px var(--gutter); background: rgba(255,255,255,.92); backdrop-filter: blur(14px); border-top: 1px solid var(--line); }
  .sticky-buy .btn { height: 44px; padding: 0 20px; }
  .sticky-buy .price { font-size: 18px; white-space: nowrap; }
  body.has-sticky { padding-bottom: 72px; }
}
@media (prefers-reduced-motion: reduce) {
  * { animation: none !important; transition: none !important; }
  .js .reveal { opacity: 1; transform: none; }
}