:root {
  --navy: #08243c;
  --navy-2: #0d3453;
  --blue: #155d8b;
  --orange: #ef7d20;
  --orange-dark: #ca6010;
  --teal: #187568;
  --ink: #132330;
  --body: #40515d;
  --muted: #6a7882;
  --line: #dce3e7;
  --soft: #f3f6f8;
  --soft-blue: #eaf1f5;
  --white: #fff;
  --shadow: 0 14px 40px rgba(8, 36, 60, .1);
  --shadow-sm: 0 8px 24px rgba(8, 36, 60, .08);
  --radius: 6px;
  --container: 1220px;
  --section: 104px;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; scroll-padding-top: 84px; }
body {
  margin: 0;
  color: var(--ink);
  background: var(--white);
  font-family: Arial, "Helvetica Neue", sans-serif;
  font-size: 16px;
  line-height: 1.65;
  letter-spacing: 0;
  overflow-x: hidden;
}
body.menu-open { overflow: hidden; }
img { display: block; max-width: 100%; }
a { color: inherit; text-decoration: none; }
button, input, select, textarea { font: inherit; letter-spacing: 0; }
button { cursor: pointer; }
sub { font-size: .65em; }

.skip-link { position: fixed; left: 14px; top: -60px; z-index: 3000; padding: 10px 14px; background: var(--orange); color: #fff; }
.skip-link:focus { top: 14px; }
.container { width: min(var(--container), calc(100% - 48px)); margin: 0 auto; }
.section { padding: var(--section) 0; }
.section-label { margin: 0 0 12px; color: var(--orange-dark); font-size: .77rem; font-weight: 800; text-transform: uppercase; letter-spacing: .12em; }
.section-heading { max-width: 760px; margin-bottom: 48px; }
.section-heading.centered { margin-inline: auto; text-align: center; }
.section-heading h2, .contact-copy h2, .company-intro h2, .selector-copy h2, .sources-grid h2 {
  margin: 0;
  color: var(--navy);
  font-size: clamp(2rem, 3.5vw, 3.25rem);
  line-height: 1.12;
  letter-spacing: 0;
}
.section-heading > p:last-child { color: var(--body); font-size: 1.05rem; }
.section-intro { color: var(--body); font-size: 1.1rem; }

.site-header { position: fixed; inset: 0 0 auto; z-index: 1000; color: #fff; transition: background .25s ease, box-shadow .25s ease, color .25s ease; }
.site-header.scrolled, .site-header.open { color: var(--navy); background: rgba(255,255,255,.97); box-shadow: 0 6px 24px rgba(8,36,60,.1); backdrop-filter: blur(14px); }
.nav-shell { width: min(1320px, calc(100% - 40px)); height: 78px; margin: 0 auto; display: flex; align-items: center; justify-content: space-between; }
.brand { display: flex; align-items: center; width: 168px; height: 44px; overflow: hidden; }
.brand img { width: 168px; height: auto; }
.site-header:not(.scrolled):not(.open) .brand img { filter: brightness(0) invert(1); }
.main-nav { display: flex; align-items: center; gap: 28px; }
.main-nav a { position: relative; padding: 28px 0 24px; font-size: .9rem; font-weight: 700; }
.main-nav a:not(.nav-cta)::after { content: ""; position: absolute; left: 0; right: 100%; bottom: 19px; height: 2px; background: var(--orange); transition: right .25s ease; }
.main-nav a:hover::after, .main-nav a.active::after { right: 0; }
.main-nav .nav-cta { padding: 11px 18px; color: #fff; background: var(--orange); border-radius: 4px; }
.main-nav .nav-cta:hover { background: var(--orange-dark); }
.menu-toggle { display: none; width: 42px; height: 42px; padding: 9px; border: 0; background: transparent; }
.menu-toggle span { display: block; width: 24px; height: 2px; margin: 5px 0; background: currentColor; transition: transform .2s ease, opacity .2s ease; }

.hero { position: relative; min-height: 88vh; display: flex; align-items: center; color: #fff; isolation: isolate; }
.hero-media { position: absolute; inset: 0; z-index: -3; background: url("asset/hero-line.webp") center 42% / cover no-repeat; }
.hero-overlay { position: absolute; inset: 0; z-index: -2; background: linear-gradient(90deg, rgba(4,23,38,.94) 0%, rgba(4,23,38,.84) 42%, rgba(4,23,38,.36) 72%, rgba(4,23,38,.22) 100%); }
.hero::after { content: ""; position: absolute; inset: auto 0 0; height: 110px; z-index: -1; background: linear-gradient(to top, rgba(4,23,38,.42), transparent); }
.hero-inner { padding-top: 102px; padding-bottom: 78px; }
.hero-copy { max-width: 760px; }
.hero h1 { max-width: 730px; margin: 0 0 24px; font-size: clamp(2.8rem, 6.5vw, 5.75rem); line-height: .98; font-weight: 800; letter-spacing: 0; }
.hero-copy > p { max-width: 690px; margin: 0; color: rgba(255,255,255,.86); font-size: 1.15rem; }
.hero-actions { display: flex; flex-wrap: wrap; gap: 12px; margin: 34px 0 42px; }
.button { min-height: 48px; display: inline-flex; align-items: center; justify-content: center; padding: 12px 22px; border: 1px solid transparent; border-radius: 4px; font-weight: 800; transition: transform .2s ease, background .2s ease, border-color .2s ease; }
.button:hover { transform: translateY(-2px); }
.button-primary { color: #fff; background: var(--orange); border-color: var(--orange); }
.button-primary:hover { background: var(--orange-dark); border-color: var(--orange-dark); }
.button-ghost { color: #fff; border-color: rgba(255,255,255,.65); background: rgba(255,255,255,.08); }
.button-ghost:hover { background: rgba(255,255,255,.16); }
.button-secondary { color: #fff; background: var(--teal); border-color: var(--teal); }
.hero-facts { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); max-width: 720px; margin: 0; padding-top: 24px; border-top: 1px solid rgba(255,255,255,.24); }
.hero-facts div { padding-right: 20px; }
.hero-facts dt { font-size: 1.45rem; font-weight: 800; }
.hero-facts dd { margin: 2px 0 0; color: rgba(255,255,255,.7); font-size: .84rem; }
.hero .hero-note { max-width: 720px; margin-top: 16px; color: rgba(255,255,255,.6); font-size: .76rem; }
.hero-scroll { position: absolute; right: max(24px, calc((100vw - var(--container)) / 2)); bottom: 24px; font-size: .76rem; font-weight: 800; text-transform: uppercase; letter-spacing: .1em; }
.hero-scroll span { padding-left: 8px; color: var(--orange); }

.overview { padding: 78px 0; border-bottom: 1px solid var(--line); }
.overview-grid { display: grid; grid-template-columns: 1fr 1fr; column-gap: 70px; row-gap: 46px; align-items: start; }
.overview-grid .section-heading { margin: 0; }
.overview-copy p { margin-top: 0; color: var(--body); font-size: 1.03rem; }
.overview-metrics { grid-column: 1/-1; display: grid; grid-template-columns: repeat(4, 1fr); border-top: 1px solid var(--line); }
.overview-metrics div { padding: 26px 28px 0 0; border-right: 1px solid var(--line); }
.overview-metrics div + div { padding-left: 28px; }
.overview-metrics div:last-child { border-right: 0; }
.overview-metrics strong { display: block; color: var(--navy); font-size: 1.7rem; line-height: 1.2; }
.overview-metrics span { color: var(--muted); font-size: .88rem; }

.mineral-section { background: var(--soft); }
.property-strip { display: grid; grid-template-columns: repeat(5, 1fr); margin: 8px 0 64px; background: var(--white); border: 1px solid var(--line); box-shadow: var(--shadow-sm); }
.property-strip div { min-width: 0; padding: 22px 20px; border-right: 1px solid var(--line); }
.property-strip div:last-child { border-right: 0; }
.property-strip span, .product-facts dt { display: block; margin-bottom: 3px; color: var(--muted); font-size: .76rem; text-transform: uppercase; font-weight: 700; }
.property-strip strong { color: var(--navy); font-size: 1.02rem; overflow-wrap: anywhere; }
.knowledge-grid { display: grid; grid-template-columns: 1.05fr .95fr; gap: 64px; align-items: center; }
.knowledge-copy h3, .fineness-title h3, .region-intro h3, .spec-heading h3, .parts-group h3, .cert-copy h3, .video-layout h3 { margin: 0 0 22px; color: var(--navy); font-size: 1.65rem; line-height: 1.2; }
.quality-list { border-top: 1px solid var(--line); }
.quality-list > div { display: grid; grid-template-columns: 150px 1fr; gap: 22px; padding: 15px 0; border-bottom: 1px solid var(--line); }
.quality-list b { color: var(--navy); }
.quality-list p { margin: 0; color: var(--body); }
.quality-figure { margin: 0; }
.quality-figure img { width: 100%; aspect-ratio: 4/3; object-fit: cover; border-radius: var(--radius); box-shadow: var(--shadow); }
figcaption { color: var(--muted); font-size: .82rem; }
.quality-figure figcaption, .principle-grid figcaption { padding: 12px 0 0; }

.fineness-block { margin-top: 88px; padding: 44px; background: var(--navy); color: #fff; box-shadow: var(--shadow); border-radius: var(--radius); }
.fineness-title { display: flex; align-items: end; justify-content: space-between; gap: 30px; }
.fineness-title h3 { color: #fff; margin: 0; }
.fineness-title p { max-width: 520px; margin: 0; color: rgba(255,255,255,.68); font-size: .88rem; }
.chart-wrap { position: relative; height: 350px; margin-top: 30px; }
#finenessChart { display: block; width: 100%; height: 100%; }
.mesh-key { display: flex; flex-wrap: wrap; gap: 10px 22px; padding-top: 18px; border-top: 1px solid rgba(255,255,255,.16); color: rgba(255,255,255,.62); font-size: .77rem; }
.applications-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 18px; margin-top: 64px; }
.application-card { overflow: hidden; background: #fff; border: 1px solid var(--line); border-radius: var(--radius); box-shadow: var(--shadow-sm); }
.application-card img { width: 100%; aspect-ratio: 4/3; object-fit: cover; }
.application-card div { padding: 20px; }
.application-card span, .case-card span { color: var(--orange-dark); font-size: .74rem; font-weight: 800; text-transform: uppercase; }
.application-card h3, .case-card h3 { margin: 6px 0 8px; color: var(--navy); font-size: 1.1rem; line-height: 1.28; }
.application-card p, .case-card p { margin: 0; color: var(--body); font-size: .88rem; }
.region-band { display: grid; grid-template-columns: .78fr 1.22fr; gap: 70px; margin-top: 76px; padding-top: 56px; border-top: 1px solid var(--line); }
.region-intro p { color: var(--body); }
.region-list { border-top: 1px solid var(--line); }
.region-list div { display: grid; grid-template-columns: 150px 1fr; gap: 24px; padding: 16px 0; border-bottom: 1px solid var(--line); }
.region-list b { color: var(--navy); }
.region-list span { color: var(--body); }

.process-section { background: #fff; }
.process-rail { margin: 0; padding: 0; list-style: none; border-top: 1px solid var(--line); }
.process-rail li { display: grid; grid-template-columns: 110px 1fr; gap: 32px; padding: 28px 0; border-bottom: 1px solid var(--line); }
.process-rail > li > span { color: var(--orange); font-size: 2rem; font-weight: 800; line-height: 1; }
.process-rail h3 { display: inline-block; width: 220px; margin: 0; color: var(--navy); font-size: 1.15rem; vertical-align: top; }
.process-rail p { display: inline-block; width: calc(100% - 240px); margin: 0; color: var(--body); vertical-align: top; }
.process-note { margin-top: 32px; padding: 20px 24px; color: #fff; background: var(--teal); border-left: 5px solid #55b6a8; }

.selector-section { color: #fff; background: linear-gradient(120deg, var(--navy) 0%, var(--navy-2) 58%, #125e6a 100%); }
.selector-grid { display: grid; grid-template-columns: 1.1fr .9fr; gap: 72px; align-items: center; }
.selector-copy h2 { color: #fff; }
.selector-copy > p { color: rgba(255,255,255,.72); }
.selector-form { display: grid; grid-template-columns: 1fr 1fr auto; gap: 12px; margin-top: 30px; align-items: end; }
.selector-form label { color: rgba(255,255,255,.7); font-size: .78rem; font-weight: 700; }
.selector-form select { width: 100%; height: 50px; margin-top: 7px; padding: 0 34px 0 12px; color: var(--ink); background: #fff; border: 1px solid transparent; border-radius: 4px; }
.selector-result { padding: 40px; color: var(--ink); background: #fff; border-top: 5px solid var(--orange); box-shadow: 0 22px 54px rgba(0,0,0,.2); border-radius: var(--radius); }
.result-label { color: var(--muted); font-size: .74rem; font-weight: 800; text-transform: uppercase; }
.selector-result h3 { margin: 8px 0 14px; color: var(--navy); font-size: 2rem; line-height: 1.12; }
.selector-result p { color: var(--body); }
.selector-result a, .text-link { color: var(--orange-dark); font-weight: 800; border-bottom: 1px solid currentColor; }

.mills-section { padding-bottom: 70px; }
.comparison-table-wrap, .table-scroll { width: 100%; overflow-x: auto; border: 1px solid var(--line); }
.comparison-table, .spec-table { width: 100%; border-collapse: collapse; background: #fff; }
.comparison-table { min-width: 760px; }
.comparison-table th, .comparison-table td { padding: 17px 22px; border-bottom: 1px solid var(--line); text-align: left; }
.comparison-table thead th { color: #fff; background: var(--navy); }
.comparison-table tbody th { width: 22%; color: var(--navy); background: var(--soft); }
.comparison-table tbody td { width: 39%; color: var(--body); }
.comparison-table tbody td:last-child { background: rgba(24,117,104,.045); }

.product-section { padding-top: 80px; }
.product-alt { background: var(--soft); }
.product-hero { display: grid; grid-template-columns: .9fr 1.1fr; gap: 80px; align-items: center; }
.product-hero.reverse { grid-template-columns: 1.1fr .9fr; }
.product-hero.reverse .product-image { grid-column: 2; }
.product-hero.reverse .product-copy { grid-column: 1; grid-row: 1; }
.product-image { min-height: 520px; display: grid; place-items: center; overflow: hidden; background: var(--soft-blue); border-radius: var(--radius); }
.product-alt .product-image { background: #fff; }
.product-image img { width: 100%; height: 520px; object-fit: cover; }
.product-image.raymond-image img { object-fit: contain; padding: 50px; }
.product-copy h2 { margin: 0 0 22px; color: var(--navy); font-size: clamp(2.1rem, 4vw, 3.45rem); line-height: 1.08; letter-spacing: 0; }
.product-copy > p { color: var(--body); font-size: 1.03rem; }
.product-facts { display: grid; grid-template-columns: repeat(3, 1fr); margin: 28px 0 26px; border-top: 1px solid var(--line); border-bottom: 1px solid var(--line); }
.product-facts div { padding: 18px 16px 18px 0; }
.product-facts dd { margin: 0; color: var(--navy); font-weight: 800; font-size: .9rem; }
.principle-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 64px; align-items: center; margin-top: 88px; }
.principle-grid.reverse figure { grid-column: 1; grid-row: 1; }
.principle-grid.reverse > div { grid-column: 2; }
.principle-grid h3 { margin: 0 0 20px; color: var(--navy); font-size: 1.8rem; line-height: 1.2; }
.principle-grid p { color: var(--body); }
.principle-grid figure { margin: 0; }
.principle-grid img { width: 100%; aspect-ratio: 4/3; object-fit: cover; border-radius: var(--radius); box-shadow: var(--shadow); }
.feature-rail { display: grid; grid-template-columns: repeat(5, 1fr); gap: 0; margin-top: 80px; border-top: 1px solid var(--line); border-bottom: 1px solid var(--line); }
.feature-rail > div { padding: 24px 18px; border-right: 1px solid var(--line); }
.feature-rail > div:last-child { border-right: 0; }
.feature-rail span { color: var(--orange); font-size: .76rem; font-weight: 800; }
.feature-rail h3 { margin: 7px 0 8px; color: var(--navy); font-size: 1rem; }
.feature-rail p { margin: 0; color: var(--muted); font-size: .83rem; }
.spec-block { margin-top: 80px; }
.spec-heading { display: flex; justify-content: space-between; gap: 50px; align-items: end; margin-bottom: 22px; }
.spec-heading h3 { margin: 0; }
.spec-heading p { max-width: 560px; margin: 0; color: var(--muted); font-size: .86rem; }
.spec-table { min-width: 960px; font-size: .86rem; }
.spec-table th, .spec-table td { padding: 13px 15px; border-right: 1px solid var(--line); border-bottom: 1px solid var(--line); text-align: center; white-space: nowrap; }
.spec-table thead th { color: #fff; background: var(--navy); }
.spec-table tbody th { color: var(--navy); background: var(--soft); }
.spec-table tbody tr:hover td { background: #f8fbfc; }
.video-layout { display: grid; grid-template-columns: 1.25fr .75fr; gap: 54px; margin-top: 80px; align-items: center; }
.video-frame { position: relative; overflow: hidden; background: #000; border-radius: var(--radius); box-shadow: var(--shadow); }
.video-frame video { display: block; width: 100%; aspect-ratio: 16/9; object-fit: cover; }
.video-watermark { position: absolute; right: 14px; top: 14px; display: flex; align-items: center; gap: 8px; padding: 6px 9px; color: #fff; background: rgba(8,36,60,.76); pointer-events: none; }
.video-watermark img { width: 56px; filter: brightness(0) invert(1); }
.video-watermark span { font-size: .7rem; font-weight: 800; }

.material-section { border-top: 1px solid var(--line); }
.material-grid { display: grid; grid-template-columns: repeat(6, 1fr); gap: 14px; }
.material-grid figure { margin: 0; overflow: hidden; background: #fff; border: 1px solid var(--line); border-radius: var(--radius); }
.material-grid img { width: 100%; aspect-ratio: 1/1; object-fit: cover; }
.material-grid figcaption { padding: 13px; }
.material-grid b, .material-grid span { display: block; }
.material-grid b { color: var(--navy); font-size: .9rem; }
.material-grid span { font-size: .73rem; }

.cases-section { background: var(--soft); }
.case-tabs, .faq-tabs { display: flex; justify-content: center; margin-bottom: 34px; }
.case-tab, .faq-tab { min-height: 44px; padding: 9px 20px; color: var(--navy); background: #fff; border: 1px solid var(--line); font-weight: 800; }
.case-tab + .case-tab, .faq-tab + .faq-tab { border-left: 0; }
.case-tab.active, .faq-tab.active { color: #fff; background: var(--navy); border-color: var(--navy); }
.case-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; }
.case-card { overflow: hidden; background: #fff; border: 1px solid var(--line); border-radius: var(--radius); box-shadow: var(--shadow-sm); }
.case-card[hidden] { display: none; }
.case-card img { width: 100%; aspect-ratio: 4/3; object-fit: cover; }
.case-card div { padding: 22px; }

.parts-section { background: #fff; }
.parts-columns { display: grid; grid-template-columns: 1fr 1fr; gap: 56px; }
.parts-group { padding-top: 22px; border-top: 3px solid var(--navy); }
.parts-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 12px; }
.parts-grid figure { margin: 0; overflow: hidden; border: 1px solid var(--line); border-radius: var(--radius); }
.parts-grid img { width: 100%; aspect-ratio: 1/1; object-fit: cover; }
.parts-grid figcaption { padding: 10px; color: var(--navy); font-weight: 800; text-align: center; }
.parts-group > p { color: var(--body); font-size: .88rem; }
.parts-benefits { display: grid; grid-template-columns: repeat(5, 1fr); margin-top: 50px; color: #fff; background: var(--navy); }
.parts-benefits span { padding: 18px 14px; border-right: 1px solid rgba(255,255,255,.14); text-align: center; font-size: .85rem; font-weight: 800; }

.company-section { background: var(--soft); }
.company-intro { display: grid; grid-template-columns: 1fr 1fr; gap: 72px; margin-bottom: 58px; }
.company-intro p { color: var(--body); }
.factory-gallery { display: grid; grid-template-columns: 1.4fr .8fr .8fr; grid-template-rows: 220px 220px; gap: 14px; }
.factory-gallery figure { position: relative; margin: 0; overflow: hidden; border-radius: var(--radius); }
.factory-gallery .factory-main { grid-row: 1/3; }
.factory-gallery figure:last-child { grid-column: 2/4; }
.factory-gallery img { width: 100%; height: 100%; object-fit: cover; }
.factory-gallery figcaption { position: absolute; inset: auto 0 0; padding: 30px 14px 12px; color: #fff; background: linear-gradient(to top, rgba(0,0,0,.68), transparent); }
.cert-layout { display: grid; grid-template-columns: .65fr 1.35fr; gap: 60px; align-items: center; margin-top: 72px; }
.cert-copy p { color: var(--body); }
.cert-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 12px; }
.cert-card { min-width: 0; padding: 0; color: var(--navy); background: #fff; border: 1px solid var(--line); border-radius: var(--radius); overflow: hidden; text-align: left; }
.cert-card img { width: 100%; aspect-ratio: 4/3; object-fit: contain; padding: 12px; }
.cert-card span { display: block; min-height: 56px; padding: 12px; border-top: 1px solid var(--line); font-size: .78rem; font-weight: 800; }

.service-section { color: #fff; background: var(--navy); }
.service-section .section-label { color: #f6a45f; }
.service-section .section-heading h2 { color: #fff; }
.service-timeline { display: grid; grid-template-columns: repeat(6, 1fr); margin: 0; padding: 0; list-style: none; border-top: 1px solid rgba(255,255,255,.18); }
.service-timeline li { padding: 26px 18px 0; border-right: 1px solid rgba(255,255,255,.12); }
.service-timeline li:last-child { border-right: 0; }
.service-timeline span { color: var(--orange); font-weight: 800; }
.service-timeline h3 { margin: 12px 0 8px; font-size: 1rem; }
.service-timeline p { margin: 0; color: rgba(255,255,255,.62); font-size: .82rem; }

.faq-section { background: #fff; }
.faq-panel { width: min(900px, 100%); margin: 0 auto; }
.faq-panel[hidden] { display: none; }
.faq-panel details { border-top: 1px solid var(--line); }
.faq-panel details:last-child { border-bottom: 1px solid var(--line); }
.faq-panel summary { position: relative; padding: 20px 48px 20px 0; color: var(--navy); font-weight: 800; list-style: none; cursor: pointer; }
.faq-panel summary::-webkit-details-marker { display: none; }
.faq-panel summary::after { content: "+"; position: absolute; right: 4px; top: 14px; color: var(--orange); font-size: 1.6rem; font-weight: 400; }
.faq-panel details[open] summary::after { content: "−"; }
.faq-panel p { margin: 0; padding: 0 48px 22px 0; color: var(--body); }

.sources-section { background: var(--soft); border-top: 1px solid var(--line); }
.sources-grid { display: grid; grid-template-columns: .8fr 1.2fr; gap: 72px; }
.sources-grid > div > p:last-child { color: var(--body); }
.sources-grid ol { margin: 0; padding-left: 22px; }
.sources-grid li { padding: 11px 0 11px 8px; border-bottom: 1px solid var(--line); }
.sources-grid a { color: var(--blue); font-weight: 800; text-decoration: underline; text-underline-offset: 3px; }
.sources-grid li span { display: block; color: var(--muted); font-size: .82rem; }

.contact-section { padding: 100px 0; color: #fff; background: linear-gradient(125deg, #0b2d48, #145c75); }
.contact-grid { display: grid; grid-template-columns: .8fr 1.2fr; gap: 72px; align-items: start; }
.contact-copy h2 { color: #fff; }
.contact-copy > p { color: rgba(255,255,255,.72); }
.contact-details { margin-top: 32px; border-top: 1px solid rgba(255,255,255,.18); }
.contact-details > * { display: block; padding: 15px 0; border-bottom: 1px solid rgba(255,255,255,.18); }
.contact-details span { display: block; color: rgba(255,255,255,.55); font-size: .73rem; text-transform: uppercase; font-weight: 800; }
.contact-details strong { display: block; margin-top: 3px; font-size: .92rem; line-height: 1.5; }
.inquiry-form { padding: 34px; color: var(--ink); background: #fff; border-radius: var(--radius); box-shadow: 0 20px 54px rgba(0,0,0,.2); }
.form-row { display: grid; grid-template-columns: 1fr 1fr; gap: 14px; }
.inquiry-form label { display: block; margin-bottom: 13px; color: var(--navy); font-size: .78rem; font-weight: 800; }
.inquiry-form input, .inquiry-form textarea { width: 100%; margin-top: 6px; padding: 12px; color: var(--ink); background: #fbfcfd; border: 1px solid #cfd9df; border-radius: 3px; outline: none; }
.inquiry-form input { height: 46px; }
.inquiry-form textarea { resize: vertical; }
.inquiry-form input:focus, .inquiry-form textarea:focus, .selector-form select:focus { border-color: var(--blue); box-shadow: 0 0 0 3px rgba(21,93,139,.13); }
.inquiry-form .invalid { border-color: #bd2c32; }
.form-actions { display: flex; flex-wrap: wrap; gap: 10px; margin-top: 8px; }
.form-status { min-height: 24px; margin: 12px 0 0; color: var(--teal); font-size: .82rem; }

.site-footer { padding: 64px 0 22px; color: rgba(255,255,255,.7); background: #061a2a; }
.footer-grid { display: grid; grid-template-columns: 1.3fr 1fr 1fr 1fr; gap: 52px; }
.footer-brand img { filter: brightness(0) invert(1); margin-bottom: 18px; }
.footer-brand p { max-width: 310px; }
.footer-grid h2 { margin: 0 0 16px; color: #fff; font-size: .9rem; }
.footer-grid a { display: block; margin: 8px 0; font-size: .84rem; }
.footer-grid a:hover { color: #fff; }
.footer-bottom { display: flex; justify-content: space-between; gap: 20px; margin-top: 48px; padding-top: 20px; border-top: 1px solid rgba(255,255,255,.12); font-size: .75rem; }

.whatsapp-float { position: fixed; right: 22px; bottom: 22px; z-index: 900; width: 56px; height: 56px; display: grid; place-items: center; color: #fff; background: #1fae62; border-radius: 50%; box-shadow: 0 10px 28px rgba(0,0,0,.24); }
.whatsapp-float svg { width: 30px; height: 30px; }
.lightbox { width: min(760px, calc(100% - 34px)); max-height: 88vh; padding: 18px; border: 0; border-radius: var(--radius); box-shadow: var(--shadow); }
.lightbox::backdrop { background: rgba(1,12,20,.8); }
.lightbox img { max-height: 80vh; margin: auto; object-fit: contain; }
.lightbox-close { position: absolute; right: 10px; top: 8px; z-index: 1; width: 38px; height: 38px; padding: 0; color: #fff; background: var(--navy); border: 0; border-radius: 50%; font-size: 1.6rem; line-height: 1; }

.reveal { opacity: 0; transform: translateY(18px); transition: opacity .55s ease, transform .55s ease; }
.reveal.visible { opacity: 1; transform: none; }

@media (max-width: 1060px) {
  :root { --section: 88px; }
  .main-nav { gap: 18px; }
  .main-nav a { font-size: .82rem; }
  .property-strip { grid-template-columns: repeat(3, 1fr); }
  .property-strip div:nth-child(3) { border-right: 0; }
  .property-strip div:nth-child(n+4) { border-top: 1px solid var(--line); }
  .applications-grid { grid-template-columns: repeat(2, 1fr); }
  .feature-rail { grid-template-columns: repeat(3, 1fr); }
  .feature-rail > div:nth-child(3) { border-right: 0; }
  .feature-rail > div:nth-child(n+4) { border-top: 1px solid var(--line); }
  .material-grid { grid-template-columns: repeat(3, 1fr); }
  .service-timeline { grid-template-columns: repeat(3, 1fr); row-gap: 34px; }
  .service-timeline li:nth-child(3) { border-right: 0; }
  .footer-grid { grid-template-columns: 1.3fr 1fr 1fr; }
  .footer-grid > div:last-child { grid-column: 2; }
}

@media (min-width: 861px) and (max-height: 760px) {
  .hero { min-height: 82vh; }
  .hero-inner { padding-top: 84px; padding-bottom: 30px; }
  .hero h1 { max-width: 650px; margin-bottom: 16px; font-size: 4.15rem; }
  .hero-copy > p { font-size: 1rem; }
  .hero-actions { margin: 24px 0 28px; }
  .hero-facts { padding-top: 16px; }
  .hero-facts dt { font-size: 1.16rem; }
  .hero .hero-note { margin-top: 10px; font-size: .7rem; }
  .overview { padding-top: 40px; }
}

@media (max-width: 860px) {
  .container { width: min(100% - 34px, var(--container)); }
  .menu-toggle { display: block; }
  .site-header:not(.scrolled):not(.open) .menu-toggle { color: #fff; }
  .main-nav { position: fixed; inset: 78px 0 auto; max-height: 0; display: block; overflow: hidden; background: #fff; box-shadow: 0 18px 35px rgba(8,36,60,.14); transition: max-height .28s ease; }
  .main-nav.open { max-height: calc(100vh - 78px); overflow-y: auto; }
  .main-nav a { display: block; padding: 15px 24px; color: var(--navy); border-top: 1px solid var(--line); }
  .main-nav a::after { display: none; }
  .main-nav .nav-cta { margin: 14px 20px 22px; padding: 13px 18px; text-align: center; }
  .menu-toggle[aria-expanded="true"] span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
  .menu-toggle[aria-expanded="true"] span:nth-child(2) { opacity: 0; }
  .menu-toggle[aria-expanded="true"] span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }
  .hero { min-height: 84vh; }
  .hero-overlay { background: linear-gradient(90deg, rgba(4,23,38,.94), rgba(4,23,38,.62)); }
  .hero-scroll { display: none; }
  .overview-grid, .knowledge-grid, .region-band, .selector-grid, .product-hero, .product-hero.reverse, .principle-grid, .video-layout, .company-intro, .cert-layout, .sources-grid, .contact-grid { grid-template-columns: 1fr; gap: 42px; }
  .product-hero.reverse .product-image, .product-hero.reverse .product-copy, .principle-grid.reverse figure, .principle-grid.reverse > div { grid-column: auto; grid-row: auto; }
  .overview-metrics { grid-template-columns: repeat(2, 1fr); }
  .overview-metrics div:nth-child(2) { border-right: 0; }
  .overview-metrics div:nth-child(n+3) { margin-top: 22px; padding-top: 22px; border-top: 1px solid var(--line); }
  .process-rail h3, .process-rail p { display: block; width: auto; }
  .process-rail h3 { margin-bottom: 6px; }
  .selector-form { grid-template-columns: 1fr 1fr; }
  .selector-form .button { grid-column: 1/-1; }
  .product-image { min-height: 420px; }
  .product-image img { height: 420px; }
  .case-grid { grid-template-columns: repeat(2, 1fr); }
  .parts-columns { grid-template-columns: 1fr; }
  .cert-grid { grid-template-columns: repeat(4, 1fr); }
  .factory-gallery { grid-template-columns: 1fr 1fr; grid-template-rows: 300px 220px 220px; }
  .factory-gallery .factory-main { grid-column: 1/3; grid-row: 1; }
  .factory-gallery figure:last-child { grid-column: 1/3; }
  .footer-grid { grid-template-columns: 1fr 1fr; }
  .footer-grid > div:last-child { grid-column: auto; }
}

@media (max-width: 620px) {
  :root { --section: 72px; }
  .container { width: min(100% - 28px, var(--container)); }
  .nav-shell { width: calc(100% - 28px); height: 70px; }
  .main-nav { top: 70px; }
  .brand, .brand img { width: 142px; }
  .hero { min-height: 86vh; }
  .hero-inner { padding-top: 84px; padding-bottom: 22px; }
  .hero h1 { margin-bottom: 14px; font-size: 2.5rem; line-height: 1.01; }
  .hero-copy > p { font-size: .92rem; line-height: 1.55; }
  .hero-actions { align-items: stretch; gap: 8px; margin: 22px 0 24px; }
  .hero-actions .button { width: 100%; }
  .hero-facts { grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 8px; padding-top: 14px; }
  .hero-facts div { display: block; min-width: 0; padding-right: 0; }
  .hero-facts dt { white-space: nowrap; font-size: .79rem; }
  .hero-facts dd { margin-top: 3px; font-size: .63rem; line-height: 1.3; }
  .hero .hero-note { margin-top: 9px; font-size: .61rem; line-height: 1.35; }
  .overview { padding-top: 32px; }
  .overview-metrics, .property-strip { grid-template-columns: 1fr; }
  .overview-metrics div, .overview-metrics div + div, .property-strip div { padding: 17px 0; border-right: 0; border-bottom: 1px solid var(--line); }
  .overview-metrics div:nth-child(n+3) { margin-top: 0; }
  .quality-list > div, .region-list div { grid-template-columns: 1fr; gap: 4px; }
  .fineness-block { margin-inline: -14px; padding: 28px 18px; border-radius: 0; }
  .fineness-title { display: block; }
  .fineness-title p { margin-top: 10px; }
  .chart-wrap { height: 430px; }
  .applications-grid { grid-template-columns: 1fr; }
  .process-rail li { grid-template-columns: 52px 1fr; gap: 14px; }
  .process-rail > li > span { font-size: 1.4rem; }
  .selector-form { grid-template-columns: 1fr; }
  .selector-form .button { grid-column: auto; }
  .selector-result { padding: 26px 22px; }
  .product-image { min-height: 330px; }
  .product-image img { height: 330px; }
  .product-image.raymond-image img { padding: 24px; }
  .product-facts { grid-template-columns: 1fr; }
  .product-facts div { padding: 12px 0; border-bottom: 1px solid var(--line); }
  .product-facts div:last-child { border-bottom: 0; }
  .feature-rail { grid-template-columns: 1fr; }
  .feature-rail > div { border-right: 0; border-top: 1px solid var(--line); }
  .feature-rail > div:first-child { border-top: 0; }
  .spec-heading { display: block; }
  .spec-heading p { margin-top: 10px; }
  .material-grid, .case-grid { grid-template-columns: repeat(2, 1fr); }
  .case-tabs, .faq-tabs { display: grid; grid-template-columns: 1fr 1fr; }
  .case-tab, .faq-tab { padding-inline: 10px; font-size: .82rem; }
  .parts-grid { grid-template-columns: repeat(3, minmax(0, 1fr)); }
  .parts-grid figcaption { padding: 8px 2px; font-size: .68rem; }
  .parts-benefits { grid-template-columns: 1fr; }
  .parts-benefits span { border-right: 0; border-bottom: 1px solid rgba(255,255,255,.14); }
  .factory-gallery { display: grid; grid-template-columns: 1fr; grid-template-rows: repeat(4, 230px); }
  .factory-gallery .factory-main, .factory-gallery figure:last-child { grid-column: auto; grid-row: auto; }
  .cert-grid { grid-template-columns: repeat(2, 1fr); }
  .service-timeline { grid-template-columns: 1fr 1fr; }
  .service-timeline li { border-right: 0; }
  .form-row { grid-template-columns: 1fr; gap: 0; }
  .inquiry-form { padding: 24px 18px; }
  .form-actions .button { width: 100%; }
  .footer-grid { grid-template-columns: 1fr; }
  .footer-bottom { display: block; }
  .footer-bottom span { display: block; margin-top: 8px; }
  .whatsapp-float { right: 14px; bottom: 14px; width: 48px; height: 48px; }
  .whatsapp-float svg { width: 27px; height: 27px; }
}

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