:root {
  --ink: #07131f;
  --ink-soft: #0d1d2b;
  --steel: #607080;
  --mist: #eef1f2;
  --paper: #f7f7f4;
  --white: #ffffff;
  --orange: #ff7623;
  --orange-dark: #df5810;
  --line: rgba(7, 19, 31, .09);
  --container: 1200px;
  --shadow: 0 28px 80px rgba(7, 19, 31, .13);
}

*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; scroll-padding-top: 84px; }
body {
  margin: 0;
  color: var(--ink);
  background: var(--paper);
  font-family: "Estedad", Tahoma, Arial, sans-serif;
  font-feature-settings: "ss01", "ss02";
  line-height: 1.85;
  overflow-x: hidden;
}
body.menu-open { overflow: hidden; }
a { color: inherit; text-decoration: none; }
img { display: block; max-width: 100%; }
button, input, textarea { font: inherit; }
svg { width: 1.25rem; fill: none; stroke: currentColor; stroke-width: 1.7; stroke-linecap: round; stroke-linejoin: round; }
.container { width: min(calc(100% - 2.5rem), var(--container)); margin-inline: auto; }
.skip-link { position: fixed; top: -100px; right: 1rem; z-index: 1000; padding: .7rem 1rem; color: #fff; background: var(--orange); border-radius: 0 0 .5rem .5rem; }
.skip-link:focus { top: 0; }
.section { padding: 7.5rem 0; }

.site-header { height: min(82svh, 790px); min-height: 680px; position: relative; display: flex; flex-direction: column; isolation: isolate; color: #fff; background: var(--ink); }
.hero-media { position: absolute; inset: 0; z-index: -4; background: url("../assets/img/hero-furnace.png") center/cover no-repeat; }
.hero-media::after { content: ""; position: absolute; inset: 0; background: linear-gradient(90deg, rgba(4, 13, 22, .12) 0%, rgba(4, 13, 22, .66) 48%, rgba(4, 13, 22, .98) 100%), linear-gradient(0deg, rgba(4, 13, 22, .7), transparent 52%); }
.hero-glow { position: absolute; inset: 0; z-index: -3; background: radial-gradient(circle at 22% 54%, rgba(255, 118, 35, .22), transparent 27%); }
.hero-grid { position: absolute; inset: 84px 0 0; z-index: -2; opacity: .17; background-image: linear-gradient(rgba(255,255,255,.12) 1px, transparent 1px), linear-gradient(90deg, rgba(255,255,255,.12) 1px, transparent 1px); background-size: 82px 82px; mask-image: linear-gradient(90deg, transparent 10%, #000 100%); }

.site-nav { height: 84px; position: absolute; inset: 0 0 auto; z-index: 100; display: flex; align-items: center; border-bottom: 1px solid rgba(255,255,255,.14); transition: background .3s, height .3s, box-shadow .3s; }
.site-nav.is-fixed { position: fixed; height: 72px; background: rgba(5, 16, 26, .93); box-shadow: 0 10px 30px rgba(0,0,0,.18); backdrop-filter: blur(16px); }
.nav-inner { display: flex; align-items: center; gap: 3.2rem; }
.brand { display: inline-flex; align-items: center; gap: .85rem; min-width: max-content; color: #fff; }
.brand-mark { position: relative; width: 44px; height: 44px; display: inline-flex; align-items: center; justify-content: center; transform: skew(-10deg); }
.brand-mark::before { content: ""; position: absolute; inset: 3px 10px; border: 2px solid var(--orange); border-top-width: 5px; border-bottom: 0; }
.brand-mark i { position: absolute; display: block; width: 3px; height: 30px; background: #fff; transform: rotate(30deg); }
.brand-mark i:nth-child(2) { height: 22px; transform: translateX(8px) rotate(-30deg); background: var(--orange); }
.brand-mark i:nth-child(3) { width: 18px; height: 3px; transform: translateY(6px); background: #fff; }
.brand-copy { line-height: 1.25; }
.brand-copy strong { display: block; font-size: 1.02rem; font-weight: 850; }
.brand-copy small { display: block; margin-top: .3rem; color: #aab6be; font-size: .64rem; letter-spacing: .1em; direction: ltr; }
.main-menu { display: flex; align-items: center; gap: 2rem; }
.main-menu a { position: relative; color: #cbd4da; font-size: .78rem; font-weight: 600; transition: color .25s; }
.main-menu a::after { content: ""; position: absolute; right: 0; bottom: -.7rem; width: 0; height: 2px; background: var(--orange); transition: width .25s; }
.main-menu a:hover, .main-menu a.active { color: #fff; }
.main-menu a:hover::after, .main-menu a.active::after { width: 1.6rem; }
.nav-cta { margin-right: auto; display: inline-flex; align-items: center; gap: .65rem; min-width: max-content; padding: .7rem 1.1rem; border: 0; border-radius: .65rem .65rem .65rem .15rem; color: #fff; background: rgba(255,118,35,.12); box-shadow: inset 0 0 0 1px rgba(255,118,35,.68); font-size: .69rem; font-weight: 750; transition: background .25s, box-shadow .25s, transform .25s; }
.nav-cta:hover { background: var(--orange); box-shadow: 0 10px 30px rgba(255,118,35,.24); transform: translateY(-2px); }
.nav-cta svg { width: 1rem; transform: rotate(180deg); }
.menu-toggle { display: none; width: 44px; height: 44px; padding: 10px; border: 0; background: transparent; color: #fff; cursor: pointer; }
.menu-toggle span { display: block; height: 2px; margin: 5px 0; background: currentColor; transition: transform .25s, opacity .25s; }

.hero-layout { flex: 1; min-height: 0; padding-top: 7rem; padding-bottom: 5.25rem; display: flex; align-items: center; }
.hero-copy { width: min(100%, 690px); position: relative; }
.hero-copy::before { content: ""; position: absolute; top: -2.2rem; right: -1.7rem; width: 76px; height: 76px; border-top: 1px solid rgba(255,118,35,.65); border-right: 1px solid rgba(255,118,35,.65); opacity: .7; }
.eyebrow { display: flex; align-items: center; gap: .75rem; margin-bottom: 1rem; color: #d9e0e5; font-size: .73rem; font-weight: 700; letter-spacing: .02em; }
.eyebrow span { width: 2.5rem; height: 2px; background: var(--orange); box-shadow: 0 0 18px var(--orange); }
.hero-copy h1 { margin: 0; max-width: 690px; font-size: clamp(3.1rem, 5.7vw, 5.35rem); line-height: 1.15; letter-spacing: -.065em; font-weight: 900; text-wrap: balance; text-shadow: 0 18px 45px rgba(0,0,0,.24); }
.hero-copy h1 em, .section-heading h2 em, .section-copy h2 em, .contact-copy h2 em { color: var(--orange); font-style: normal; }
.hero-copy > p { max-width: 570px; margin: 1.4rem 0 0; color: #d3dce2; font-size: .92rem; line-height: 2.05; font-weight: 450; }
.hero-actions { display: flex; flex-wrap: wrap; gap: .8rem; margin-top: 1.85rem; }
.btn { min-height: 52px; display: inline-flex; align-items: center; justify-content: center; gap: .8rem; padding: .78rem 1.5rem; border: 0; border-radius: .75rem .75rem .75rem .15rem; font-size: .75rem; font-weight: 800; transition: transform .25s, background .25s, box-shadow .25s; }
.btn:hover { transform: translateY(-2px); }
.btn-primary { color: #fff; background: linear-gradient(135deg, #ff8538, var(--orange)); box-shadow: 0 16px 36px rgba(255,118,35,.24); }
.btn-primary:hover { background: var(--orange-dark); }
.btn-primary svg { width: 1rem; transform: rotate(180deg); }
.btn-ghost { color: #fff; background: rgba(255,255,255,.055); box-shadow: inset 0 0 0 1px rgba(255,255,255,.34); backdrop-filter: blur(8px); }
.btn-ghost:hover { background: rgba(255,255,255,.12); box-shadow: inset 0 0 0 1px rgba(255,255,255,.7); }
.hero-footer { position: absolute; right: 50%; bottom: 4.7rem; transform: translateX(50%); display: flex; justify-content: space-between; align-items: flex-end; }
.location-chip { display: flex; align-items: center; gap: .75rem; color: #fff; font-size: .76rem; }
.location-chip svg { color: var(--orange); }
.location-chip small { display: block; color: #a8b4bc; font-size: .64rem; }
.scroll-hint { display: flex; flex-direction: column; align-items: center; gap: .5rem; color: #a9b5bd; font-size: .58rem; }
.scroll-hint i { display: block; width: 1px; height: 2.6rem; background: linear-gradient(var(--orange), transparent); }

.trust-strip { position: relative; z-index: 5; height: 96px; background: var(--paper); }
.trust-grid { min-height: 128px; display: grid; grid-template-columns: repeat(4, 1fr); position: relative; top: -32px; overflow: hidden; background: rgba(255,255,255,.97); border-radius: 1.35rem .35rem 1.35rem 1.35rem; box-shadow: 0 24px 70px rgba(7,19,31,.12); }
.trust-item { min-height: 128px; position: relative; display: flex; align-items: center; gap: 1rem; padding: 1.55rem 1.35rem; }
.trust-item:not(:last-child)::after { content: ""; position: absolute; left: 0; top: 27%; width: 1px; height: 46%; background: linear-gradient(transparent, rgba(7,19,31,.14), transparent); }
.trust-icon { width: 50px; height: 50px; flex: 0 0 auto; display: grid; place-items: center; color: #fff; background: linear-gradient(145deg, #ff8a42, var(--orange)); border-radius: 1rem .3rem 1rem 1rem; box-shadow: 0 12px 24px rgba(255,118,35,.18); }
.trust-icon svg { width: 1.55rem; }
.trust-item strong, .trust-item small { display: block; }
.trust-item strong { font-size: .96rem; line-height: 1.7; font-weight: 850; }
.trust-item small { margin-top: .25rem; color: #526574; font-size: .8rem; line-height: 1.8; }

.about { position: relative; overflow: hidden; background: var(--paper); }
.about::before { content: "FERROALLOY"; position: absolute; left: -2rem; bottom: -2.5rem; color: rgba(7,19,31,.035); font-size: clamp(5rem, 12vw, 11rem); line-height: 1; font-weight: 900; letter-spacing: .04em; direction: ltr; }
.about-grid { display: grid; grid-template-columns: .95fr 1.05fr; align-items: center; gap: 7rem; }
.about-visual { position: relative; min-height: 560px; }
.image-frame { overflow: hidden; background: #d9dddf; border-radius: 1.8rem .4rem 1.8rem 1.8rem; box-shadow: var(--shadow); }
.image-frame img { width: 100%; height: 100%; object-fit: cover; transition: transform .8s ease; }
.image-frame:hover img { transform: scale(1.025); }
.image-main { position: absolute; top: 0; right: 0; width: 84%; height: 420px; }
.image-detail { position: absolute; left: 0; bottom: 0; width: 54%; height: 250px; border: 10px solid var(--paper); border-radius: 1.4rem .25rem 1.4rem 1.4rem; }
.visual-stamp { position: absolute; right: 4%; bottom: 3.2rem; width: 145px; height: 145px; display: flex; flex-direction: column; justify-content: center; padding: 1.2rem; color: #fff; background: linear-gradient(145deg, #102434, var(--ink)); border: 0; border-radius: 1.3rem .3rem 1.3rem 1.3rem; box-shadow: var(--shadow); direction: ltr; }
.visual-stamp::before { content: ""; position: absolute; top: 1rem; right: 1rem; width: 26px; height: 3px; border-radius: 2px; background: var(--orange); }
.visual-stamp span { color: var(--orange); font-size: .83rem; font-weight: 900; letter-spacing: .14em; }
.visual-stamp small { margin-top: .55rem; color: #aeb9c0; font-size: .55rem; line-height: 1.5; letter-spacing: .12em; }
.visual-index { position: absolute; top: -4rem; left: 0; color: rgba(7,19,31,.06); font-size: 8rem; line-height: 1; font-weight: 900; direction: ltr; }
.section-label { display: flex; align-items: center; gap: .8rem; margin-bottom: 1.1rem; }
.section-label::before { content: ""; width: 2.4rem; height: 2px; background: var(--orange); }
.section-label span { color: var(--ink); font-size: .76rem; font-weight: 850; }
.section-label small { color: #9aa5ad; font-size: .55rem; font-weight: 700; letter-spacing: .14em; direction: ltr; }
.section-copy h2, .section-heading h2, .contact-copy h2 { margin: 0; font-size: clamp(2.35rem, 4vw, 3.85rem); line-height: 1.35; letter-spacing: -.055em; font-weight: 900; text-wrap: balance; }
.section-copy .lead { margin: 1.6rem 0 .9rem; color: #243747; font-size: 1rem; font-weight: 600; line-height: 2; }
.section-copy > p:not(.lead) { margin: 0; color: var(--steel); font-size: .84rem; }
.about-values { display: grid; grid-template-columns: 1fr 1fr; gap: .75rem; margin: 2rem 0; padding: 0; border: 0; }
.about-values > div { display: flex; align-items: center; gap: .8rem; padding: 1rem; background: #fff; border-radius: 1rem .25rem 1rem 1rem; box-shadow: 0 12px 35px rgba(7,19,31,.055); }
.about-values > div > b { color: var(--orange); font-size: 1.48rem; line-height: 1; direction: ltr; }
.about-values strong, .about-values small { display: block; }
.about-values strong { font-size: .96rem; line-height: 1.7; }
.about-values small { color: #526574; font-size: .8rem; line-height: 1.8; }
.text-link { display: inline-flex; align-items: center; gap: .65rem; padding: .65rem 0 .45rem; position: relative; font-size: .9rem; font-weight: 850; }
.text-link::after { content: ""; position: absolute; right: 0; bottom: 0; width: 52%; height: 2px; border-radius: 2px; background: var(--orange); transition: width .25s; }
.text-link:hover::after { width: 100%; }
.text-link svg { width: 1rem; color: var(--orange); transform: rotate(180deg); }

.products { position: relative; overflow: hidden; color: #fff; background: var(--ink); }
.products::before { content: ""; position: absolute; inset: 0; background: radial-gradient(circle at 0 15%, rgba(255,118,35,.12), transparent 30%), linear-gradient(135deg, transparent 48%, rgba(255,255,255,.02) 48%); }
.products .container { position: relative; }
.section-heading { display: flex; align-items: end; justify-content: space-between; gap: 3rem; margin-bottom: 3.2rem; }
.section-heading > p { max-width: 390px; margin: 0 0 .5rem; color: #99a7b1; font-size: .8rem; }
.section-label-light span { color: #fff; }
.product-grid { display: grid; grid-template-columns: 1.3fr .7fr; gap: 1.25rem; }
.product-card { min-height: 510px; position: relative; overflow: hidden; border: 0; border-radius: 1.6rem .4rem 1.6rem 1.6rem; box-shadow: 0 30px 75px rgba(0,0,0,.22); }
.product-card-featured > img { position: absolute; inset: 0; width: 100%; height: 100%; object-fit: cover; }
.product-overlay { position: absolute; inset: 0; background: linear-gradient(0deg, rgba(5,15,24,.98) 0%, rgba(5,15,24,.18) 70%), linear-gradient(90deg, transparent, rgba(5,15,24,.3)); }
.product-number { position: absolute; top: 1.6rem; left: 1.8rem; z-index: 2; color: rgba(255,255,255,.68); font-size: .8rem; letter-spacing: .12em; direction: ltr; }
.product-content { position: absolute; right: 0; bottom: 0; left: 0; z-index: 2; padding: 2.15rem; }
.product-content > span { color: var(--orange); font-size: .86rem; font-weight: 850; }
.product-content h3 { margin: .3rem 0 .7rem; font-size: clamp(1.6rem, 2.5vw, 2.3rem); line-height: 1.45; letter-spacing: -.04em; }
.product-content p { max-width: 620px; margin: 0 0 1.2rem; color: #d4dce1; font-size: .96rem; line-height: 2; }
.product-content a { display: inline-flex; align-items: center; gap: .65rem; color: #fff; font-size: .9rem; font-weight: 850; }
.product-content a svg { width: 1rem; color: var(--orange); transform: rotate(180deg); transition: transform .25s; }
.product-content a:hover svg { transform: rotate(180deg) translateX(4px); }
.product-card-secondary { background: linear-gradient(145deg, #142a3b, #091721); }
.product-card-secondary::before { content: ""; position: absolute; inset: 0; background: radial-gradient(circle at 40% 15%, rgba(255,118,35,.16), transparent 26%); }
.product-pattern { position: absolute; inset: 0; opacity: .13; background-image: linear-gradient(30deg, transparent 47%, #fff 48%, #fff 49%, transparent 50%), linear-gradient(150deg, transparent 47%, #fff 48%, #fff 49%, transparent 50%); background-size: 38px 66px; }
.product-card-secondary .product-content { top: 50%; bottom: auto; transform: translateY(-43%); }
.product-content ul { margin: 1.25rem 0 1.65rem; padding: 0; list-style: none; }
.product-content li { position: relative; padding: .55rem 1.25rem .55rem 0; color: #d1d9de; border-bottom: 1px solid rgba(255,255,255,.09); font-size: .88rem; line-height: 1.8; }
.product-content li::before { content: ""; position: absolute; right: 0; top: 1rem; width: 5px; height: 5px; background: var(--orange); }

.process { background: var(--mist); }
.section-heading-dark > p { color: var(--steel); }
.process-grid { position: relative; display: grid; grid-template-columns: repeat(4, 1fr); gap: 1rem; }
.process-grid::before { content: ""; position: absolute; top: 3.1rem; right: 9%; left: 9%; height: 1px; background: linear-gradient(90deg, transparent, rgba(255,118,35,.55), transparent); }
.process-card { min-height: 286px; position: relative; z-index: 1; overflow: hidden; padding: 2rem 1.55rem 1.7rem; background: rgba(255,255,255,.88); border: 0; border-radius: 1.25rem .3rem 1.25rem 1.25rem; box-shadow: 0 15px 45px rgba(7,19,31,.055); transition: transform .3s, box-shadow .3s, background .3s; }
.process-card::after { content: ""; position: absolute; right: 0; top: 0; width: 4px; height: 0; border-radius: 0 0 0 4px; background: var(--orange); transition: height .35s; }
.process-card:hover { transform: translateY(-8px); background: #fff; box-shadow: 0 24px 55px rgba(7,19,31,.1); }
.process-card:hover::after { height: 100%; }
.process-icon { width: 62px; height: 62px; display: grid; place-items: center; margin-bottom: 1.7rem; color: #fff; background: linear-gradient(145deg, #ff8c47, var(--orange)); border: 0; border-radius: 1rem .25rem 1rem 1rem; box-shadow: 0 14px 30px rgba(255,118,35,.2); }
.process-icon svg { width: 1.7rem; }
.process-card > span { display: block; color: #84929d; font-size: .68rem; font-weight: 700; }
.process-card h3 { margin: .35rem 0 .65rem; font-size: 1.12rem; line-height: 1.7; font-weight: 850; letter-spacing: -.025em; }
.process-card p { margin: 0; color: #526574; font-size: .78rem; line-height: 2; }

.contact { min-height: 590px; position: relative; isolation: isolate; display: flex; align-items: center; color: #fff; background: var(--ink); overflow: hidden; }
.contact-backdrop { position: absolute; inset: 0; z-index: -2; background: url("../assets/img/hero-furnace.png") center/cover no-repeat; }
.contact-backdrop::after { content: ""; position: absolute; inset: 0; background: linear-gradient(90deg, rgba(5,15,24,.75), rgba(5,15,24,.96) 55%, rgba(5,15,24,.98)); }
.contact::after { content: ""; position: absolute; width: 500px; height: 500px; left: -180px; bottom: -250px; z-index: -1; border: 1px solid rgba(255,118,35,.3); border-radius: 50%; box-shadow: 0 0 0 70px rgba(255,118,35,.035), 0 0 0 140px rgba(255,118,35,.025); }
.contact-inner { display: grid; grid-template-columns: .9fr 1.1fr; align-items: center; gap: 6rem; padding-block: 6rem; }
.contact-copy > p { max-width: 480px; margin: 1.3rem 0 2rem; color: #b9c4cb; font-size: .82rem; }
.contact-cards { display: grid; gap: .85rem; }
.contact-card { min-height: 96px; position: relative; overflow: hidden; display: grid; grid-template-columns: auto 1fr auto; align-items: center; gap: 1rem; padding: 1.1rem 1.25rem; border: 0; border-radius: 1.2rem .3rem 1.2rem 1.2rem; background: linear-gradient(110deg, rgba(255,255,255,.11), rgba(255,255,255,.045)); box-shadow: inset 0 0 0 1px rgba(255,255,255,.1), 0 18px 45px rgba(0,0,0,.12); backdrop-filter: blur(10px); transition: background .25s, box-shadow .25s, transform .25s; }
.contact-card::after { content: ""; position: absolute; left: 0; top: 0; width: 3px; height: 100%; background: linear-gradient(transparent, var(--orange), transparent); opacity: 0; transition: opacity .25s; }
.contact-card:hover { transform: translateX(-6px); background: linear-gradient(110deg, rgba(255,255,255,.15), rgba(255,255,255,.07)); box-shadow: inset 0 0 0 1px rgba(255,118,35,.28), 0 22px 50px rgba(0,0,0,.18); }
.contact-card:hover::after { opacity: 1; }
.contact-icon { width: 50px; height: 50px; display: grid; place-items: center; color: #fff; background: linear-gradient(145deg, #ff8a42, var(--orange)); border-radius: 1rem .25rem 1rem 1rem; box-shadow: 0 10px 25px rgba(255,118,35,.18); }
.contact-icon svg { width: 1.4rem; }
.contact-card small, .contact-card b { display: block; }
.contact-card small { color: #bcc6cc; font-size: .84rem; line-height: 1.7; font-weight: 600; }
.contact-card b { margin-top: .12rem; color: #fff; font-size: 1.02rem; line-height: 1.7; font-weight: 750; text-align: right; }
.contact-card > i { color: var(--orange); font-size: 1.1rem; font-style: normal; }

.site-footer { color: #c7d0d7; background: #050f18; border-top: 1px solid rgba(255,255,255,.1); }
.footer-main { display: grid; grid-template-columns: 1.5fr .7fr 1.25fr .75fr; gap: 3.5rem; padding: 3.8rem 0 3rem; }
.footer-about > p { margin: 1rem 0 0; color: #a4b0b8; font-size: .88rem; }
.footer-group { display: flex; flex-direction: column; align-items: flex-start; gap: .55rem; }
.footer-group > strong { margin-bottom: .5rem; color: #fff; font-size: 1rem; line-height: 1.7; }
.footer-group a, .footer-group span, .footer-group p { margin: 0; color: #aab5bc; font-size: .84rem; line-height: 2; transition: color .25s; }
.footer-group a:hover { color: var(--orange); }
.footer-address p { line-height: 2.1; }
.footer-bottom { min-height: 76px; display: flex; align-items: center; justify-content: space-between; gap: 2rem; border-top: 1px solid rgba(255,255,255,.09); color: #8c9aa3; font-size: .78rem; }
.footer-en { direction: ltr; letter-spacing: .1em; font-size: .72rem; }
.back-to-top { position: fixed; left: 1.25rem; bottom: 1.25rem; z-index: 90; width: 44px; height: 44px; display: grid; place-items: center; border: 0; border-radius: 0; color: #fff; background: var(--orange); box-shadow: 0 12px 30px rgba(255,118,35,.28); cursor: pointer; opacity: 0; visibility: hidden; transform: translateY(10px); transition: opacity .25s, visibility .25s, transform .25s; }
.back-to-top.visible { opacity: 1; visibility: visible; transform: none; }
.reveal { opacity: 0; transform: translateY(24px); transition: opacity .75s ease, transform .75s ease; }
.reveal.is-visible { opacity: 1; transform: none; }

@media (max-width: 1050px) {
  .nav-inner { gap: 1.5rem; }
  .main-menu { gap: 1.15rem; }
  .nav-cta { display: none; }
  .hero-layout { display: flex; }
  .about-grid { gap: 4rem; }
  .footer-main { gap: 2rem; }
}

@media (max-width: 820px) {
  .section { padding: 5.5rem 0; }
  .site-nav, .site-nav.is-fixed { height: 72px; }
  .menu-toggle { display: block; margin-right: auto; position: relative; z-index: 2; }
  .menu-toggle.is-open span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
  .menu-toggle.is-open span:nth-child(2) { opacity: 0; }
  .menu-toggle.is-open span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }
  .main-menu { position: fixed; inset: 0; z-index: 1; display: flex; flex-direction: column; align-items: flex-start; justify-content: center; gap: 1.5rem; padding: 5rem 2rem; background: rgba(5,15,24,.98); visibility: hidden; opacity: 0; transform: translateY(-10px); transition: opacity .25s, visibility .25s, transform .25s; }
  .main-menu.open { visibility: visible; opacity: 1; transform: none; }
  .main-menu a { font-size: 1.25rem; }
  .hero-grid { inset-block-start: 72px; }
  .site-header { height: auto; min-height: 700px; }
  .hero-layout { min-height: 700px; align-content: center; padding-top: 8rem; padding-bottom: 7rem; }
  .hero-copy { margin-top: auto; }
  .hero-copy h1 { font-size: clamp(3rem, 11vw, 5rem); }
  .trust-grid { grid-template-columns: 1fr 1fr; }
  .trust-strip { height: auto; padding: 1.25rem 0; }
  .trust-grid { top: 0; }
  .trust-item:nth-child(2)::after { display: none; }
  .trust-item:nth-child(-n+2) { border-bottom: 1px solid rgba(7,19,31,.06); }
  .about-grid { grid-template-columns: 1fr; gap: 4.5rem; }
  .about-visual { min-height: 510px; max-width: 600px; }
  .product-grid { grid-template-columns: 1fr; }
  .product-card { min-height: 470px; }
  .product-card-secondary { min-height: 410px; }
  .process-grid { grid-template-columns: 1fr 1fr; }
  .process-grid::before { display: none; }
  .contact-inner { grid-template-columns: 1fr; gap: 3rem; }
  .footer-main { grid-template-columns: 1fr 1fr; }
}

@media (max-width: 560px) {
  .container { width: min(calc(100% - 1.5rem), var(--container)); }
  .brand-mark { width: 38px; height: 38px; }
  .brand-copy strong { font-size: .82rem; }
  .brand-copy small { font-size: .5rem; }
  .hero-media { background-position: 40% center; }
  .hero-media::after { background: linear-gradient(90deg, rgba(4,13,22,.32), rgba(4,13,22,.9) 58%, rgba(4,13,22,.98)); }
  .site-header { min-height: 680px; }
  .hero-layout { min-height: 680px; padding-top: 7.5rem; padding-bottom: 6.5rem; }
  .hero-copy h1 { font-size: clamp(2.8rem, 15vw, 4rem); }
  .hero-copy > p { font-size: .85rem; }
  .hero-actions { align-items: stretch; }
  .hero-actions .btn { flex: 1 1 100%; }
  .hero-footer { bottom: 2.2rem; }
  .scroll-hint { display: none; }
  .trust-grid { grid-template-columns: 1fr; padding-block: .35rem; border-radius: 1rem .25rem 1rem 1rem; }
  .trust-item, .trust-item:nth-child(2) { min-height: 92px; }
  .trust-item::after, .trust-item:nth-child(2)::after { display: block; top: auto; right: 1.3rem; bottom: 0; left: 1.3rem; width: auto; height: 1px; background: linear-gradient(90deg, transparent, rgba(7,19,31,.1), transparent); }
  .trust-item:last-child::after { display: none; }
  .section { padding: 4.5rem 0; }
  .about-visual { min-height: 410px; }
  .image-main { width: 92%; height: 320px; }
  .image-detail { width: 58%; height: 175px; border-width: 7px; }
  .visual-stamp { width: 118px; height: 118px; bottom: 1.8rem; padding: .9rem; }
  .visual-index { display: none; }
  .section-copy h2, .section-heading h2, .contact-copy h2 { font-size: 2.25rem; }
  .about-values { grid-template-columns: 1fr; }
  .section-heading { display: block; margin-bottom: 2.2rem; }
  .section-heading > p { margin-top: 1rem; }
  .product-card { min-height: 440px; }
  .product-card-secondary { min-height: 400px; }
  .product-content { padding: 1.4rem; }
  .process-grid { grid-template-columns: 1fr; }
  .process-card { min-height: 245px; }
  .contact-inner { padding-block: 4.5rem; }
  .contact-card { grid-template-columns: auto 1fr; }
  .contact-card > i { display: none; }
  .contact-card small { font-size: .78rem; }
  .contact-card b { font-size: .88rem; overflow-wrap: anywhere; }
  .footer-main { grid-template-columns: 1fr; gap: 2.4rem; }
  .footer-bottom { align-items: flex-start; flex-direction: column; justify-content: center; padding-block: 1rem; }
  .footer-en { display: none; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { scroll-behavior: auto !important; animation-duration: .01ms !important; transition-duration: .01ms !important; }
  .reveal { opacity: 1; transform: none; }
}