/* ALPHA OPTRON — English corporate site. Theme «glass & light»: pearl white, deep violet ink, one violet accent,
   iridescence only where light hits glass (hero glare, card sheen). Mobile-first; wider screens via min-width.
   Same page skeleton as phytonia-20261106 (build.py · worker · admin), new look. */
:root {
  --ink: #15122b;
  --ink-2: #4f4b66;
  --ink-3: #8f8ba6;
  --pearl: #f7f6fb;
  --pearl-2: #eeecf6;
  --line: #e6e3f0;
  --accent: #6b5cf6;
  --accent-2: #9d93ff;
  --night: #0e0c1d;
  --iris: conic-gradient(from 200deg at 50% 50%, #ffd9ec, #d7d2ff, #c6f3ee, #fff3c9, #ffd9ec);
  --display: "Syne", "Pretendard Variable", -apple-system, sans-serif;
  --serif: "Instrument Serif", Georgia, serif;
  --body: "Pretendard Variable", Pretendard, -apple-system, "Segoe UI", sans-serif;
  --pad: clamp(20px, 5vw, 80px);
  --max: 1360px;
  --ease: cubic-bezier(.2, .7, .2, 1);
  --mx: 50%; --my: 40%;
}
* { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; scroll-padding-top: 80px; -webkit-text-size-adjust: 100%; }
body { font-family: var(--body); color: var(--ink); background: var(--pearl); font-size: 16px; line-height: 1.65; word-break: keep-all; overflow-wrap: break-word; -webkit-font-smoothing: antialiased; overflow-x: hidden; }
a { color: inherit; text-decoration: none; }
button { font: inherit; color: inherit; background: none; border: 0; cursor: pointer; }
img { display: block; max-width: 100%; height: auto; }
[hidden] { display: none !important; }
.wrap { max-width: var(--max); margin: 0 auto; padding: 0 var(--pad); }
.sr { position: absolute; left: -9999px; }
.sr:focus { left: 12px; top: 12px; z-index: 99; background: #fff; padding: 8px 12px; }
:focus-visible { outline: 2px solid var(--accent); outline-offset: 3px; }
::selection { background: #d9d4ff; }

/* type */
.eyebrow { display: inline-flex; align-items: center; gap: 10px; font: 700 11.5px/1 var(--display); letter-spacing: .22em; text-transform: uppercase; color: var(--accent); margin-bottom: 20px; }
.eyebrow::before { content: ""; width: 8px; height: 8px; border-radius: 50%; background: var(--iris); box-shadow: 0 0 0 3px rgba(107, 92, 246, .12); }
.h2 { font: 700 clamp(32px, 7vw, 66px)/1.02 var(--display); letter-spacing: -0.04em; }
.h2 em, .serif { font-family: var(--serif); font-style: italic; font-weight: 400; letter-spacing: -0.01em; color: var(--accent); }
.lead { font-size: clamp(16.5px, 1.45vw, 19px); color: var(--ink-2); max-width: 38em; }
p + p { margin-top: 1em; }
.iris-text { background: linear-gradient(100deg, var(--ink) 20%, var(--accent) 45%, #36c5bd 60%, var(--ink) 80%); background-size: 250% 100%; -webkit-background-clip: text; background-clip: text; color: transparent; animation: irisMove 9s ease-in-out infinite; }
@keyframes irisMove { 0%, 100% { background-position: 0 0; } 50% { background-position: 100% 0; } }

/* buttons */
.btn { display: inline-flex; align-items: center; gap: 12px; min-height: 54px; padding: 0 28px; border-radius: 999px; font: 700 14.5px var(--display); letter-spacing: .01em; position: relative; overflow: hidden; isolation: isolate; transition: transform .35s var(--ease), box-shadow .35s, background .3s, color .3s; }
.btn i { font-style: normal; transition: transform .35s var(--ease); }
.btn:hover { transform: translateY(-2px); }
.btn:hover i { transform: translateX(4px); }
.btn::after { content: ""; position: absolute; inset: 0; z-index: -1; background: linear-gradient(110deg, transparent 30%, rgba(255, 255, 255, .55) 48%, transparent 66%); transform: translateX(-120%); transition: transform .9s var(--ease); }
.btn:hover::after { transform: translateX(120%); }
.btn-fill { background: var(--ink); color: #fff; box-shadow: 0 16px 34px -18px rgba(21, 18, 43, .7); }
.btn-ghost { border: 1px solid currentColor; }
.btn-white { background: #fff; color: var(--ink); }
.link { display: inline-flex; align-items: center; gap: 10px; font: 700 14px var(--display); padding-bottom: 6px; border-bottom: 1px solid currentColor; }
.link i { font-style: normal; transition: transform .35s var(--ease); }
.link:hover i { transform: translateX(5px); }

/* header — frosted pearl bar */
.hd { position: fixed; inset: 12px 12px auto; z-index: 50; height: 60px; display: flex; align-items: center; gap: 22px; padding: 0 12px 0 22px; border-radius: 999px; background: rgba(255, 255, 255, .72); backdrop-filter: blur(16px) saturate(1.4); -webkit-backdrop-filter: blur(16px) saturate(1.4); border: 1px solid rgba(255, 255, 255, .7); box-shadow: 0 10px 30px -20px rgba(21, 18, 43, .4); transition: inset .35s, box-shadow .35s; }
.hd.is-solid { box-shadow: 0 14px 36px -18px rgba(21, 18, 43, .45); }
.logo { display: flex; align-items: center; gap: 10px; margin-right: auto; line-height: 1; }
.logo svg { width: 26px; height: 26px; flex: none; }
.logo b { font: 800 16px var(--display); letter-spacing: .2em; }
.logo small { display: none; }
.nav { display: none; gap: clamp(22px, 2.6vw, 40px); font: 600 14px var(--display); }
.nav a { position: relative; padding: 8px 0; color: var(--ink-2); transition: color .3s; }
.nav a:hover, .nav a[aria-current="page"] { color: var(--ink); }
.nav a::after { content: ""; position: absolute; left: 50%; bottom: 0; width: 5px; height: 5px; margin-left: -2.5px; border-radius: 50%; background: var(--accent); transform: scale(0); transition: transform .3s var(--ease); }
.nav a:hover::after, .nav a[aria-current="page"]::after { transform: scale(1); }
.hd-lang { display: none; font: 700 11.5px var(--display); letter-spacing: .14em; padding: 9px 14px; border-radius: 999px; background: var(--ink); color: #fff; }
.burger { width: 44px; height: 44px; display: grid; place-content: center; gap: 6px; border-radius: 50%; background: var(--ink); }
.burger i { display: block; width: 18px; height: 1.5px; background: #fff; transition: transform .35s var(--ease), opacity .3s; }
.menu { position: fixed; inset: 0; z-index: 49; background: var(--night); color: #fff; padding: 110px var(--pad) 40px; display: flex; flex-direction: column; gap: 4px; opacity: 0; visibility: hidden; transition: opacity .4s, visibility .4s; overflow: hidden; }
.menu::before { content: ""; position: absolute; right: -30vw; top: -20vw; width: 80vw; aspect-ratio: 1; border-radius: 50%; background: var(--iris); filter: blur(80px); opacity: .25; }
.menu a { position: relative; font: 700 clamp(36px, 10vw, 64px)/1.15 var(--display); letter-spacing: -0.035em; opacity: 0; transform: translateY(16px); transition: opacity .5s, transform .5s var(--ease); }
.menu .menu-foot { position: relative; margin-top: auto; font-size: 14px; opacity: .7; line-height: 1.8; }
body.menu-open { overflow: hidden; }
body.menu-open .menu { opacity: 1; visibility: visible; }
body.menu-open .menu a { opacity: 1; transform: none; }
body.menu-open .menu a:nth-child(2) { transition-delay: .05s; }
body.menu-open .menu a:nth-child(3) { transition-delay: .1s; }
body.menu-open .menu a:nth-child(4) { transition-delay: .15s; }
body.menu-open .menu a:nth-child(5) { transition-delay: .2s; }
body.menu-open .menu a:nth-child(6) { transition-delay: .25s; }
body.menu-open .hd { background: rgba(255, 255, 255, .1); border-color: rgba(255, 255, 255, .15); color: #fff; }
body.menu-open .burger { background: #fff; }
body.menu-open .burger i { background: var(--ink); }
body.menu-open .burger i:nth-child(1) { transform: translateY(7.5px) rotate(45deg); }
body.menu-open .burger i:nth-child(2) { opacity: 0; }
body.menu-open .burger i:nth-child(3) { transform: translateY(-7.5px) rotate(-45deg); }

/* hero — pearl light field + glass card that catches the pointer */
.hero { position: relative; min-height: 100svh; overflow: hidden; display: grid; align-items: center; padding: 108px 0 56px;
  background: radial-gradient(40% 45% at var(--mx) var(--my), rgba(157, 147, 255, .28), transparent 70%), radial-gradient(50% 50% at 90% 10%, rgba(198, 243, 238, .55), transparent 70%), radial-gradient(45% 45% at 5% 90%, rgba(255, 217, 236, .6), transparent 70%), var(--pearl); }
.hero::before { content: ""; position: absolute; inset: 0; background: var(--img) center/cover no-repeat; opacity: .16; mix-blend-mode: multiply; pointer-events: none; }
.hero-in { position: relative; z-index: 2; width: 100%; max-width: var(--max); margin: 0 auto; padding: 0 var(--pad); display: grid; gap: 40px; }
.hero-title { font: 800 clamp(48px, 14vw, 172px)/.9 var(--display); letter-spacing: -0.055em; margin: 6px 0 26px; }
.hero-title span { display: block; overflow: hidden; padding-bottom: .05em; }
.hero-title span > b { display: block; font-weight: inherit; animation: rise 1.15s var(--ease) both; }
.hero-title span:nth-child(2) > b { animation-delay: .1s; }
.hero-title span:nth-child(3) > b { animation-delay: .2s; }
.hero-title em { font-family: var(--serif); font-style: italic; font-weight: 400; letter-spacing: -0.03em; }
@keyframes rise { from { transform: translateY(110%); } to { transform: none; } }
.hero-sub { font-size: clamp(16.5px, 1.5vw, 20px); color: var(--ink-2); max-width: 31em; margin-bottom: 30px; animation: fade 1s .45s both; }
.hero-cta { display: flex; flex-wrap: wrap; gap: 12px; animation: fade 1s .6s both; }
@keyframes fade { from { opacity: 0; transform: translateY(14px); } }
.glass { position: relative; justify-self: center; width: min(86vw, 460px); aspect-ratio: 4 / 5; border-radius: 34px; overflow: hidden; background: rgba(255, 255, 255, .55); border: 1px solid rgba(255, 255, 255, .9); box-shadow: 0 50px 90px -50px rgba(21, 18, 43, .55), inset 0 1px 0 rgba(255, 255, 255, .9); transform: perspective(1000px) rotateX(var(--rx, 0deg)) rotateY(var(--ry, 0deg)); transition: transform .5s var(--ease); animation: fade 1.2s .3s both; }
.glass img { position: absolute; inset: 0; width: 100%; height: 100%; object-fit: contain; padding: 9%; mix-blend-mode: multiply; transition: transform 1.2s var(--ease); }
.glass::before { content: ""; position: absolute; inset: -40%; background: var(--iris); opacity: .35; filter: blur(40px); animation: spin 18s linear infinite; z-index: -1; }
.glass::after { content: ""; position: absolute; inset: 0; background: radial-gradient(240px circle at var(--gx, 70%) var(--gy, 20%), rgba(255, 255, 255, .85), transparent 60%), linear-gradient(115deg, transparent 35%, rgba(255, 255, 255, .5) 47%, transparent 58%); mix-blend-mode: soft-light; pointer-events: none; }
.glass-tag { position: absolute; left: 18px; bottom: 18px; z-index: 2; padding: 8px 14px; border-radius: 999px; background: rgba(255, 255, 255, .85); font: 700 11.5px var(--display); letter-spacing: .1em; text-transform: uppercase; }
@keyframes spin { to { transform: rotate(360deg); } }
.hero-note { position: absolute; right: var(--pad); bottom: 22px; z-index: 3; font-size: 10.5px; color: var(--ink-3); }

/* marquee */
.marq { overflow: hidden; border-block: 1px solid var(--line); background: #fff; }
.marq-in { display: flex; width: max-content; animation: marq 38s linear infinite; }
.marq span { display: inline-flex; align-items: center; gap: 28px; padding: 20px 28px 20px 0; font: 700 clamp(18px, 2.2vw, 28px) var(--display); letter-spacing: -0.02em; white-space: nowrap; }
.marq span::after { content: "✦"; font-size: .6em; color: var(--accent); }
@keyframes marq { to { transform: translateX(-50%); } }

/* sub-page hero */
.ph { position: relative; min-height: 58svh; display: flex; align-items: flex-end; overflow: hidden; background: radial-gradient(45% 60% at 85% 20%, rgba(198, 243, 238, .6), transparent 70%), radial-gradient(45% 60% at 10% 100%, rgba(255, 217, 236, .65), transparent 70%), var(--pearl); }
.ph-bg { position: absolute; inset: 0; background: var(--img) center/cover no-repeat; opacity: .18; mix-blend-mode: multiply; }
.ph-in { position: relative; z-index: 2; width: 100%; max-width: var(--max); margin: 0 auto; padding: 130px var(--pad) 60px; }
.ph h1 { font: 800 clamp(46px, 12vw, 140px)/.92 var(--display); letter-spacing: -0.055em; }
.ph h1 em { font-family: var(--serif); font-style: italic; font-weight: 400; color: var(--accent); }
.ph p { margin-top: 20px; max-width: 34em; color: var(--ink-2); font-size: clamp(16px, 1.4vw, 19px); }
.crumb { font: 700 11.5px var(--display); letter-spacing: .16em; text-transform: uppercase; color: var(--ink-3); margin-bottom: 18px; }
.crumb a:hover { color: var(--ink); }

/* sections */
.sec { padding: clamp(84px, 11vw, 160px) 0; }
.sec.white { background: #fff; }
.sec.night { background: var(--night); color: #fff; }
.sec.night .lead { color: rgba(255, 255, 255, .72); }
.sec.night .eyebrow { color: var(--accent-2); }
.sec.night .h2 em { color: var(--accent-2); }
.sec-head { display: grid; gap: 20px; margin-bottom: clamp(40px, 6vw, 72px); }

/* statement */
.statement { font: 700 clamp(28px, 5.4vw, 64px)/1.12 var(--display); letter-spacing: -0.04em; max-width: 18em; }
.statement em { font-family: var(--serif); font-style: italic; font-weight: 400; color: var(--accent); }
.facts { display: grid; grid-template-columns: 1fr 1fr; gap: 12px; margin-top: 48px; }
.fact { padding: 22px; border-radius: 22px; background: #fff; border: 1px solid var(--line); }
.fact small { display: block; font: 700 10.5px var(--display); letter-spacing: .2em; text-transform: uppercase; color: var(--ink-3); margin-bottom: 10px; }
.fact b { font: 700 clamp(22px, 2.6vw, 34px)/1.05 var(--display); letter-spacing: -0.03em; }

/* bento — product lines */
.bento { display: grid; gap: 14px; }
.tile { position: relative; overflow: hidden; border-radius: 28px; min-height: 360px; padding: 28px; display: flex; flex-direction: column; justify-content: flex-end; background: #fff; border: 1px solid var(--line); isolation: isolate; transition: transform .5s var(--ease), box-shadow .5s; }
.tile:hover { transform: translateY(-4px); box-shadow: 0 34px 60px -40px rgba(21, 18, 43, .5); }
.tile-img { position: absolute; inset: 0 0 34% 0; display: grid; place-items: center; z-index: -1; }
.tile-img img { max-height: 92%; width: auto; max-width: 78%; object-fit: contain; mix-blend-mode: multiply; transition: transform 1s var(--ease); }
.tile:hover .tile-img img { transform: scale(1.06) rotate(-2deg); }
.tile::before { content: ""; position: absolute; inset: 0; z-index: -2; background: radial-gradient(70% 60% at 50% 30%, var(--tint, #efeafe), #fff 75%); }
.tile::after { content: ""; position: absolute; inset: 0; z-index: 1; background: linear-gradient(115deg, transparent 40%, rgba(255, 255, 255, .7) 50%, transparent 60%); transform: translateX(-100%); transition: transform 1.1s var(--ease); pointer-events: none; }
.tile:hover::after { transform: translateX(100%); }
.tile small { font: 700 11px var(--display); letter-spacing: .2em; text-transform: uppercase; color: var(--accent); }
.tile b { font: 700 clamp(26px, 3vw, 40px)/1.02 var(--display); letter-spacing: -0.035em; margin-top: 8px; }
.tile span { color: var(--ink-2); font-size: 15px; margin-top: 8px; max-width: 26em; }
.tile .go { position: absolute; top: 20px; right: 20px; width: 46px; height: 46px; border-radius: 50%; background: var(--ink); color: #fff; display: grid; place-items: center; font-style: normal; transition: transform .45s var(--ease); z-index: 2; }
.tile:hover .go { transform: rotate(-45deg); }
.tile.dark { background: var(--night); color: #fff; border-color: transparent; }
.tile.dark::before { background: radial-gradient(70% 60% at 50% 30%, #3a2f7a, var(--night) 75%); }
.tile.dark span { color: rgba(255, 255, 255, .72); }
.tile.dark small { color: var(--accent-2); }
.tile.dark .tile-img img { mix-blend-mode: normal; border-radius: 18px; }
.tile.dark .go { background: #fff; color: var(--ink); }

/* steps */
.steps { display: grid; gap: 14px; counter-reset: s; }
.step { position: relative; padding: 30px 26px 28px; border-radius: 24px; background: #fff; border: 1px solid var(--line); display: grid; gap: 12px; transition: transform .45s var(--ease), border-color .45s; overflow: hidden; }
.step:hover { transform: translateY(-3px); border-color: #cfc8fb; }
.step span { font: 700 13px var(--display); letter-spacing: .14em; color: var(--accent); }
.step b { font: 700 23px/1.15 var(--display); letter-spacing: -0.025em; }
.step p { font-size: 15px; color: var(--ink-2); }
.sec.night .step { background: rgba(255, 255, 255, .05); border-color: rgba(255, 255, 255, .1); }
.sec.night .step p { color: rgba(255, 255, 255, .7); }
.sec.night .step span { color: var(--accent-2); }

/* products rail + cards */
.rail-head { display: flex; align-items: flex-end; justify-content: space-between; gap: 20px; flex-wrap: wrap; }
.rail-ctrl { display: none; gap: 8px; }
.rail-ctrl button { width: 54px; height: 54px; border-radius: 50%; border: 1px solid var(--line); background: #fff; font-size: 18px; transition: background .3s, color .3s, border-color .3s; }
.rail-ctrl button:hover { background: var(--ink); border-color: var(--ink); color: #fff; }
.rail { display: grid; grid-auto-flow: column; grid-auto-columns: 74%; gap: 14px; overflow-x: auto; scroll-snap-type: x mandatory; scroll-padding-inline: var(--pad); padding: 4px var(--pad) 16px; scrollbar-width: none; margin-top: 40px; }
.rail::-webkit-scrollbar { display: none; }
.card { scroll-snap-align: start; position: relative; display: flex; flex-direction: column; background: #fff; border-radius: 24px; overflow: hidden; border: 1px solid var(--line); transition: transform .45s var(--ease), box-shadow .45s; isolation: isolate; }
.card:hover { transform: translateY(-5px); box-shadow: 0 30px 60px -36px rgba(21, 18, 43, .45); }
.card-img { aspect-ratio: 1; display: grid; place-items: center; overflow: hidden; background: radial-gradient(70% 70% at 50% 40%, #f3f0ff, #fff 80%); position: relative; }
.card-img::after { content: ""; position: absolute; inset: 0; background: linear-gradient(115deg, transparent 38%, rgba(255, 255, 255, .8) 50%, transparent 62%); transform: translateX(-110%); transition: transform 1s var(--ease); }
.card:hover .card-img::after { transform: translateX(110%); }
.card-img img { width: 84%; height: 84%; object-fit: contain; mix-blend-mode: multiply; transition: transform .8s var(--ease); }
.card:hover .card-img img { transform: scale(1.05); }
.card-tx { padding: 18px 20px 22px; display: grid; gap: 5px; }
.card-tx small { font: 700 10.5px var(--display); letter-spacing: .18em; text-transform: uppercase; color: var(--accent); }
.card-tx b { font: 700 16.5px/1.3 var(--display); letter-spacing: -0.015em; }
.card-tx span { font-size: 13.5px; color: var(--ink-3); }

.tabs { display: flex; gap: 8px; overflow-x: auto; scrollbar-width: none; max-width: var(--max); margin: 0 auto 32px; padding: 14px var(--pad); position: sticky; top: 80px; z-index: 5; }
.tabs::-webkit-scrollbar { display: none; }
.tab { flex: none; min-height: 44px; padding: 0 20px; border-radius: 999px; border: 1px solid var(--line); background: rgba(255, 255, 255, .85); backdrop-filter: blur(10px); font: 700 13.5px var(--display); transition: background .3s, color .3s, border-color .3s; }
.tab[aria-selected="true"] { background: var(--ink); color: #fff; border-color: var(--ink); }
.grid { display: grid; grid-template-columns: 1fr 1fr; gap: 12px; }
.grid .card[hidden] { display: none; }
.grid .card-tx { padding: 14px 14px 18px; }
.grid .card-tx b { font-size: 15px; }
.brand-row { display: grid; gap: 26px; padding: clamp(48px, 7vw, 90px) 0; border-top: 1px solid var(--line); }
.brand-row h2 { font: 800 clamp(36px, 6vw, 76px)/.95 var(--display); letter-spacing: -0.045em; }
.brand-row h2 small { display: block; font: 700 12px var(--display); letter-spacing: .2em; color: var(--ink-3); margin-top: 14px; text-transform: uppercase; }

/* product detail */
.pd { display: grid; gap: 40px; }
.pd-img { position: relative; border-radius: 30px; aspect-ratio: 1; display: grid; place-items: center; overflow: hidden; background: radial-gradient(70% 70% at 50% 40%, #f1edff, #fff 80%); border: 1px solid var(--line); }
.pd-img img { width: 80%; height: 80%; object-fit: contain; mix-blend-mode: multiply; }
.pd-tx h1 { font: 700 clamp(30px, 4.6vw, 54px)/1.04 var(--display); letter-spacing: -0.04em; margin-bottom: 18px; }
.spec { margin-top: 30px; border-top: 1px solid var(--ink); }
.spec div { display: grid; grid-template-columns: 120px 1fr; gap: 16px; padding: 15px 0; border-bottom: 1px solid var(--line); font-size: 15px; }
.spec dt { font: 700 10.5px var(--display); letter-spacing: .18em; text-transform: uppercase; color: var(--ink-3); padding-top: 4px; }
.points { margin-top: 24px; display: grid; gap: 10px; list-style: none; }
.points li { position: relative; padding-left: 24px; color: var(--ink-2); }
.points li::before { content: "✦"; position: absolute; left: 0; top: 0; color: var(--accent); font-size: 12px; }

/* split */
.split { display: grid; gap: 36px; align-items: center; }
.split-img { border-radius: 30px; overflow: hidden; aspect-ratio: 4 / 5; background: var(--pearl-2) var(--img) center/cover; position: relative; }
.split-img::after { content: ""; position: absolute; inset: 0; background: linear-gradient(115deg, transparent 40%, rgba(255, 255, 255, .35) 50%, transparent 60%); }

/* band */
.band { position: relative; overflow: hidden; background: var(--night); color: #fff; padding: clamp(96px, 12vw, 180px) 0; }
.band::before { content: ""; position: absolute; left: 50%; top: 50%; width: min(120vw, 1200px); aspect-ratio: 1; transform: translate(-50%, -50%); border-radius: 50%; background: var(--iris); filter: blur(120px); opacity: .22; animation: spin 30s linear infinite; }
.band .wrap { position: relative; }
.band .eyebrow { color: var(--accent-2); }
.band-t { font: 700 clamp(34px, 6.4vw, 84px)/1.02 var(--display); letter-spacing: -0.045em; margin-bottom: 36px; max-width: 13em; }
.band-t em { font-family: var(--serif); font-style: italic; font-weight: 400; color: var(--accent-2); }
.band-cta { display: flex; flex-wrap: wrap; gap: 12px; }
.band .btn-ghost { color: #fff; }

/* contact */
.contact-grid { display: grid; gap: 12px; }
.ct { display: grid; gap: 8px; align-content: end; min-height: 180px; padding: 28px; border-radius: 26px; border: 1px solid var(--line); background: #fff; position: relative; transition: background .35s, color .35s, transform .35s var(--ease); overflow: hidden; }
.ct small { font: 700 10.5px var(--display); letter-spacing: .2em; text-transform: uppercase; color: var(--accent); }
.ct b { font: 700 clamp(20px, 2.1vw, 28px)/1.15 var(--display); letter-spacing: -0.025em; overflow-wrap: anywhere; }
.ct span { color: var(--ink-2); font-size: 14.5px; }
.ct i { position: absolute; top: 22px; right: 24px; font-style: normal; font-size: 20px; transition: transform .35s var(--ease); }
a.ct:hover { background: var(--ink); color: #fff; transform: translateY(-3px); }
a.ct:hover small { color: var(--accent-2); }
a.ct:hover span { color: rgba(255, 255, 255, .72); }
a.ct:hover i { transform: rotate(-45deg); }
.ct-main { background: var(--night); color: #fff; border-color: transparent; }
.ct-main::before { content: ""; position: absolute; right: -30%; top: -40%; width: 80%; aspect-ratio: 1; border-radius: 50%; background: var(--iris); filter: blur(60px); opacity: .35; }
.ct-main > * { position: relative; }
.ct-main small { color: var(--accent-2); }
.ct-main span { color: rgba(255, 255, 255, .72); }

/* faq */
.faq { border-top: 1px solid var(--ink); }
.faq details { border-bottom: 1px solid var(--line); }
.faq summary { list-style: none; cursor: pointer; display: grid; grid-template-columns: 1fr 38px; gap: 16px; align-items: center; padding: 22px 0; font: 700 clamp(16.5px, 1.6vw, 19px)/1.4 var(--display); letter-spacing: -0.015em; }
.faq summary::-webkit-details-marker { display: none; }
.faq summary::after { content: "+"; width: 38px; height: 38px; border-radius: 50%; border: 1px solid var(--line); display: grid; place-items: center; font-weight: 400; transition: transform .35s var(--ease), background .3s, color .3s; }
.faq details[open] summary::after { transform: rotate(45deg); background: var(--ink); color: #fff; }
.faq details p { padding: 0 52px 24px 0; color: var(--ink-2); }
.profile { border-top: 1px solid var(--ink); }
.profile div { display: grid; grid-template-columns: 1fr; gap: 4px; padding: 18px 0; border-bottom: 1px solid var(--line); }
.profile dt { font: 700 10.5px var(--display); letter-spacing: .2em; text-transform: uppercase; color: var(--ink-3); }
.profile dd { font-size: 16px; }

/* news · inquiry form · popup */
.nlist { list-style: none; border-top: 1px solid var(--ink); margin-top: 36px; }
.nlist a { display: grid; grid-template-columns: 1fr 24px; gap: 4px 16px; align-items: center; padding: 22px 4px; border-bottom: 1px solid var(--line); transition: background .3s, padding .3s; }
.nlist a:hover { background: #fff; padding-left: 14px; }
.nlist time { grid-column: 1; font: 700 12px var(--display); letter-spacing: .08em; color: var(--ink-3); }
.nlist b { grid-column: 1; font: 700 clamp(17px, 1.7vw, 21px)/1.35 var(--display); letter-spacing: -0.015em; }
.nlist span { grid-row: 1 / 3; grid-column: 2; color: var(--accent); }
.nlist .pin { font-style: normal; font-size: 10.5px; letter-spacing: .14em; text-transform: uppercase; color: #fff; background: var(--accent); border-radius: 999px; padding: 3px 9px; margin-right: 10px; vertical-align: 3px; }
.art { max-width: 760px; font-size: 17.5px; color: var(--ink-2); }
.art p + p { margin-top: 1.1em; }
.iform { display: grid; gap: 16px; }
.iform label { display: grid; gap: 7px; font: 700 11.5px var(--display); letter-spacing: .14em; text-transform: uppercase; color: var(--ink-2); }
.iform input, .iform select, .iform textarea { font: 400 16px var(--body); color: var(--ink); padding: 14px 16px; border: 1px solid var(--line); border-radius: 16px; background: #fff; text-transform: none; letter-spacing: 0; width: 100%; }
.iform input:focus, .iform select:focus, .iform textarea:focus { outline: none; border-color: var(--accent); box-shadow: 0 0 0 4px rgba(107, 92, 246, .14); }
.iform .check { display: flex; gap: 10px; align-items: flex-start; font: 400 14px/1.5 var(--body); letter-spacing: 0; text-transform: none; }
.iform .check input { width: 18px; height: 18px; margin-top: 2px; flex: none; }
.iform .btn { justify-self: start; border: 0; cursor: pointer; }
.iform .hp { position: absolute; left: -9999px; width: 1px; height: 1px; }
.row2 { display: grid; gap: 16px; }
.form-ok { margin-top: 22px; padding: 16px 20px; border-radius: 16px; background: #ece9ff; color: var(--accent); font-weight: 700; }
.pop { position: fixed; inset: 0; z-index: 80; display: grid; place-items: center; padding: 20px; background: rgba(14, 12, 29, .5); animation: fade .4s ease; }
.pop + .pop { background: transparent; }
.pop-box { width: min(440px, 100%); max-height: 86svh; overflow: auto; background: #fff; border-radius: 26px; box-shadow: 0 40px 80px -30px rgba(0, 0, 0, .5); }
.pop-box img { width: 100%; height: auto; }
.pop-tx { padding: 24px 24px 8px; display: grid; gap: 10px; }
.pop-tx b { font: 700 22px/1.25 var(--display); letter-spacing: -0.02em; }
.pop-tx p { color: var(--ink-2); font-size: 15px; }
.pop-tx .btn { justify-self: start; margin-top: 6px; }
.pop-ft { display: flex; border-top: 1px solid var(--line); margin-top: 16px; }
.pop-ft button { flex: 1; min-height: 52px; font: 600 13.5px var(--display); color: var(--ink-2); }
.pop-ft button + button { border-left: 1px solid var(--line); color: var(--ink); }

/* footer */
.ft { background: var(--night); color: #a7a3bd; padding: 80px 0 40px; font-size: 14px; position: relative; overflow: hidden; }
.ft-word { font: 800 clamp(64px, 17vw, 260px)/.85 var(--display); letter-spacing: -0.06em; color: transparent; -webkit-text-stroke: 1px rgba(255, 255, 255, .14); white-space: nowrap; margin-top: 50px; }
.ft-top { display: grid; gap: 40px; padding-bottom: 40px; border-bottom: 1px solid rgba(255, 255, 255, .08); }
.ft .logo { color: #fff; }
.ft-cols { display: grid; grid-template-columns: 1fr 1fr; gap: 28px; }
.ft-cols b { display: block; color: #fff; font: 700 11px var(--display); letter-spacing: .2em; text-transform: uppercase; margin-bottom: 14px; }
.ft-cols a { display: block; padding: 4px 0; }
.ft-cols a:hover { color: #fff; }
.ft-info { margin-top: 28px; line-height: 1.9; font-size: 13px; }
.ft-copy { margin-top: 14px; font-size: 12px; opacity: .6; }

/* reveal */
.js .rv { opacity: 0; transform: translateY(34px); transition: opacity .95s ease, transform .95s var(--ease); }
.js .rv.in { opacity: 1; transform: none; }

@media (min-width: 640px) {
  .rail { grid-auto-columns: 42%; gap: 18px; }
  .grid { grid-template-columns: repeat(3, 1fr); gap: 16px; }
  .contact-grid { grid-template-columns: 1fr 1fr; }
  .ct-main { grid-column: 1 / -1; }
  .steps { grid-template-columns: 1fr 1fr; }
  .bento { grid-template-columns: 1fr 1fr; }
  .facts { grid-template-columns: repeat(4, 1fr); }
  .ft-cols { grid-template-columns: repeat(3, 1fr); }
  .profile div { grid-template-columns: 200px 1fr; }
  .row2 { grid-template-columns: 1fr 1fr; }
}
@media (min-width: 1024px) {
  .hd { inset: 18px 28px auto; height: 64px; padding-left: 26px; }
  .nav { display: flex; }
  .hd-lang { display: inline-block; }
  .burger { display: none; }
  .hero-in { grid-template-columns: 1.25fr 1fr; align-items: center; }
  .hero-title { font-size: clamp(80px, 8.4vw, 150px); }
  .glass { width: min(34vw, 480px); }
  .bento { grid-template-columns: repeat(6, 1fr); grid-auto-rows: 300px; }
  .tile { min-height: 0; }
  .tile.w4 { grid-column: span 4; grid-row: span 2; }
  .tile.w2 { grid-column: span 2; }
  .tile.w3 { grid-column: span 3; }
  .tile.w6 { grid-column: span 6; }
  .rail { grid-auto-columns: calc((100% - 2 * var(--pad) - 54px) / 4); }
  .rail-ctrl { display: flex; }
  .grid { grid-template-columns: repeat(4, 1fr); gap: 20px; }
  .grid .card-tx { padding: 18px 20px 22px; }
  .grid .card-tx b { font-size: 16.5px; }
  .brand-row { grid-template-columns: 1fr 2.4fr; gap: 60px; }
  .brand-row .grid { grid-template-columns: repeat(3, 1fr); }
  .pd { grid-template-columns: 1fr 1fr; gap: 80px; align-items: start; }
  .pd-img { position: sticky; top: 110px; }
  .steps { grid-template-columns: repeat(var(--n, 3), 1fr); }
  .split { grid-template-columns: 1fr 1fr; gap: 90px; }
  .split.rev .split-img { order: 2; }
  .contact-grid { grid-template-columns: 1.4fr 1fr 1fr; }
  .ct-main { grid-column: auto; grid-row: span 2; min-height: 372px; }
  .ft-top { grid-template-columns: 1fr 1.6fr; }
  .tabs { top: 90px; }
  .faq-wrap { display: grid; grid-template-columns: 1fr 1.6fr; gap: 80px; }
}
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { animation: none !important; transition: none !important; scroll-behavior: auto !important; }
  .js .rv { opacity: 1; transform: none; }
}
.pd-tx .hero-cta .btn-ghost { color: var(--ink); }

/* technology diagram — diffuse vs specular reflection */
.optic { margin: 0; padding: clamp(18px, 3vw, 30px); border-radius: 28px; background: rgba(255, 255, 255, .04); border: 1px solid rgba(255, 255, 255, .1); }
.optic svg { width: 100%; height: auto; overflow: visible; }
.optic .o-t { font: 700 15px var(--display); fill: #fff; letter-spacing: .02em; }
.optic .o-s { font: 500 13px var(--body); fill: rgba(255, 255, 255, .62); }
.optic .o-surf { fill: none; stroke: #fff; stroke-width: 3; stroke-linejoin: round; stroke-linecap: round; }
.optic .o-ray path { fill: none; stroke: url(#ray); stroke-width: 2.2; stroke-linecap: round; stroke-dasharray: 260; stroke-dashoffset: 260; }
.optic.in .o-ray path { animation: ray 1.6s var(--ease) forwards; }
.optic.in .o-ray path:nth-child(2) { animation-delay: .25s; } .optic.in .o-ray path:nth-child(3) { animation-delay: .35s; } .optic.in .o-ray path:nth-child(4) { animation-delay: .45s; } .optic.in .o-ray path:nth-child(5) { animation-delay: .55s; }
.optic .o-hi { stroke-width: 4; filter: drop-shadow(0 0 6px #9d93ff); }
@keyframes ray { to { stroke-dashoffset: 0; } }
.optic figcaption { margin-top: 14px; font-size: 14px; color: rgba(255, 255, 255, .72); }
@media (prefers-reduced-motion: reduce) { .optic .o-ray path { stroke-dashoffset: 0; } }

/* photo fills — hero glass card, bento tiles, banner-shaped product images */
.glass img { object-fit: cover; padding: 0; mix-blend-mode: normal; }
.glass:hover img { transform: scale(1.04); }
.tile-img { inset: 0; }
.tile-img img { width: 100%; height: 100%; max-width: none; max-height: none; object-fit: cover; mix-blend-mode: normal; }
.tile:hover .tile-img img { transform: scale(1.05); }
.tile::before { z-index: 0; background: linear-gradient(0deg, rgba(255, 255, 255, .97) 0%, rgba(255, 255, 255, .9) 32%, rgba(255, 255, 255, 0) 62%); }
.tile.dark::before { background: linear-gradient(0deg, rgba(14, 12, 29, .96) 0%, rgba(14, 12, 29, .82) 34%, rgba(14, 12, 29, .05) 66%); }
.tile.dark .tile-img img { border-radius: 0; }
.tile > small, .tile > b, .tile > span:not(.tile-img) { position: relative; z-index: 1; }
.card-img img.cover { width: 100%; height: 100%; object-fit: cover; mix-blend-mode: normal; }
.pd-img img.cover { width: 100%; height: 100%; object-fit: cover; mix-blend-mode: normal; }

.tile-img { background: var(--pearl-2) center/cover no-repeat; transition: transform 1.2s var(--ease); }
.tile:hover .tile-img { transform: scale(1.05); }
.tile > .tile-img { max-width: none; margin: 0; }
.brand-row .grid { align-items: start; }
.logo b { white-space: nowrap; }
@media (max-width: 639px) { .logo b { font-size: 13.5px; letter-spacing: .14em; } }