:root {
  --ink: #172522;
  --ink-2: #233a35;
  --paper: #f3f4ef;
  --white: #fff;
  --mist: #dfe5df;
  --line: #c8d0c9;
  --copper: #c7633e;
  --copper-light: #efb188;
  --lime: #c6dd66;
  --blue: #5d89a6;
  --muted: #66736d;
  --shadow: 0 22px 55px rgba(17, 34, 30, .12);
  --shell: min(1240px, calc(100vw - 48px));
  --radius: 6px;
  font-synthesis: none;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; scroll-padding-top: 82px; }
body { margin: 0; color: var(--ink); background: var(--paper); font-family: Inter, Arial, Helvetica, sans-serif; line-height: 1.65; }
body.menu-open { overflow: hidden; }
img { display: block; max-width: 100%; }
a { color: inherit; text-decoration: none; }
button, input, textarea { font: inherit; }
button { color: inherit; }
p, h1, h2, h3, h4, figure, dl, dd { margin: 0; }
h1, h2, h3 { font-family: Georgia, "Times New Roman", serif; font-weight: 500; line-height: 1.05; letter-spacing: 0; }
p { color: var(--muted); }
.shell { width: var(--shell); margin-inline: auto; }
.section { padding: 112px 0; }
.skip-link { position: fixed; top: 8px; left: 8px; z-index: 1000; transform: translateY(-150%); padding: 10px 14px; background: var(--lime); color: var(--ink); }
.skip-link:focus { transform: translateY(0); }
.chapter { font: 700 11px/1.3 Inter, Arial, sans-serif; letter-spacing: 1.8px; color: var(--copper); text-transform: uppercase; }
.section-heading { display: grid; grid-template-columns: 180px minmax(0, 1fr) minmax(260px, .55fr); gap: 38px; align-items: start; margin-bottom: 60px; }
.section-heading h2 { font-size: clamp(40px, 5vw, 68px); max-width: 760px; }
.section-heading > p:last-child { padding-top: 8px; font-size: 16px; }
.section-heading.inverted h2, .section-heading.inverted p { color: #f4f6f1; }
.section-heading.inverted .chapter { color: var(--lime); }
.button { min-height: 48px; display: inline-flex; align-items: center; justify-content: center; padding: 0 20px; border: 1px solid transparent; border-radius: 2px; font-size: 13px; font-weight: 800; text-transform: uppercase; letter-spacing: .7px; cursor: pointer; transition: .25s ease; }
.button-light { background: var(--paper); color: var(--ink); }
.button-light:hover { background: var(--lime); }
.button-dark { background: var(--ink); color: #fff; }
.button-dark:hover { background: var(--copper); }
.button-outline { background: transparent; border-color: var(--ink); color: var(--ink); }
.button-outline:hover { background: var(--ink); color: white; }

.site-header { position: fixed; inset: 0 0 auto; z-index: 100; color: white; border-bottom: 1px solid rgba(255,255,255,.2); transition: background .25s ease, color .25s ease, box-shadow .25s ease; }
.site-header.scrolled { color: var(--ink); background: rgba(243,244,239,.96); backdrop-filter: blur(15px); box-shadow: 0 8px 28px rgba(16,31,27,.09); border-color: var(--line); }
.header-inner { width: min(1380px, calc(100vw - 32px)); height: 78px; margin: auto; display: flex; align-items: center; gap: 30px; }
.brand { display: flex; align-items: center; gap: 13px; flex: 0 0 auto; }
.brand img { width: 132px; height: auto; padding: 5px 7px; background: #fff; }
.brand span { display: grid; padding-left: 12px; border-left: 1px solid currentColor; }
.brand b { font-size: 10px; letter-spacing: 1.3px; }
.brand small { font: italic 13px Georgia, serif; }
.main-nav { display: flex; align-items: center; justify-content: center; gap: 26px; margin-left: auto; }
.main-nav a { font-size: 12px; font-weight: 700; }
.main-nav a:hover { color: var(--copper-light); }
.scrolled .main-nav a:hover { color: var(--copper); }
.header-contact { margin-left: auto; padding: 10px 14px; border-bottom: 2px solid var(--lime); font-size: 12px; font-weight: 800; text-transform: uppercase; }
.menu-button { display: none; width: 42px; height: 42px; padding: 0; background: none; border: 0; cursor: pointer; }
.menu-button span { display: block; width: 22px; height: 2px; margin: 5px auto; background: currentColor; }

.hero { position: relative; min-height: min(900px, 94vh); color: white; overflow: hidden; }
.hero-media, .hero-shade { position: absolute; inset: 0; width: 100%; height: 100%; }
.hero-media { object-fit: cover; object-position: 66% center; }
.hero-shade { background: linear-gradient(90deg, rgba(9,23,20,.92) 0%, rgba(9,23,20,.74) 38%, rgba(9,23,20,.14) 75%), linear-gradient(0deg, rgba(9,23,20,.55), transparent 48%); }
.hero-content { position: relative; z-index: 2; width: min(1380px, calc(100vw - 64px)); margin: auto; padding-top: clamp(190px, 24vh, 270px); }
.edition { color: var(--lime); font-size: 11px; font-weight: 800; letter-spacing: 2px; }
.hero h1 { max-width: 820px; margin-top: 24px; font-size: clamp(64px, 9vw, 142px); color: white; }
.hero-lead { max-width: 700px; margin-top: 26px; color: rgba(255,255,255,.82); font-size: clamp(17px, 2vw, 22px); line-height: 1.55; }
.hero-actions { display: flex; align-items: center; gap: 30px; margin-top: 38px; }
.text-button { display: flex; align-items: center; gap: 12px; padding: 0; border: 0; background: none; color: white; font-weight: 700; cursor: pointer; }
.text-button span { display: grid; place-items: center; width: 46px; height: 46px; border: 1px solid rgba(255,255,255,.55); border-radius: 50%; font-size: 10px; }
.hero-index { position: absolute; z-index: 2; left: 50%; bottom: 0; width: min(1380px, calc(100vw - 64px)); transform: translateX(-50%); display: grid; grid-template-columns: repeat(4, 1fr); background: rgba(15,35,30,.88); backdrop-filter: blur(12px); border-top: 1px solid rgba(255,255,255,.22); }
.hero-index div { padding: 18px 24px; border-right: 1px solid rgba(255,255,255,.16); }
.hero-index div:last-child { border: 0; }
.hero-index dt { color: rgba(255,255,255,.55); font-size: 10px; text-transform: uppercase; letter-spacing: 1px; }
.hero-index dd { margin-top: 2px; font: 500 24px Georgia, serif; }

.intro-band { padding: 78px 0; background: var(--white); border-bottom: 1px solid var(--line); }
.intro-grid { display: grid; grid-template-columns: 180px minmax(0, 1fr) 280px; gap: 42px; align-items: start; }
.intro-grid h2 { max-width: 850px; font-size: clamp(34px, 4vw, 54px); }
.intro-grid > div p { max-width: 800px; margin-top: 28px; font-size: 17px; }
.margin-note { padding-left: 22px; border-left: 3px solid var(--copper); }
.margin-note b { font-size: 12px; text-transform: uppercase; letter-spacing: 1px; }
.margin-note p { margin-top: 10px; font-size: 13px; }

.geology { background: #f6f6f2; }
.distribution-layout { display: grid; grid-template-columns: .8fr 1.2fr; gap: 24px; }
.mineral-portrait { display: grid; grid-template-rows: 390px auto; background: var(--white); box-shadow: var(--shadow); }
.mineral-portrait img { width: 100%; height: 100%; object-fit: cover; }
.mineral-portrait > div { padding: 24px; }
.mineral-portrait span, .field-title span { display: block; color: var(--copper); font-size: 10px; font-weight: 800; letter-spacing: 1px; text-transform: uppercase; }
.mineral-portrait b { display: block; margin: 4px 0 8px; font: 500 24px Georgia, serif; }
.world-field { min-height: 544px; display: grid; grid-template-columns: repeat(2, 1fr); grid-template-rows: auto repeat(3, 1fr); gap: 1px; background: var(--line); border: 1px solid var(--line); }
.field-title { grid-column: 1 / -1; display: flex; align-items: center; justify-content: space-between; padding: 18px 22px; background: var(--ink); color: white; }
.field-title b { font: 500 22px Georgia, serif; }
.region { position: relative; padding: 24px 24px 24px 58px; background: var(--paper); overflow: hidden; }
.region::after { content: ""; position: absolute; width: 120px; height: 120px; right: -55px; bottom: -70px; border: 1px solid rgba(23,37,34,.14); border-radius: 50%; box-shadow: 0 0 0 20px rgba(23,37,34,.025), 0 0 0 40px rgba(23,37,34,.02); }
.region i { position: absolute; left: 24px; top: 28px; width: 16px; height: 16px; border: 4px solid var(--copper); border-radius: 50%; }
.region b { display: block; font-size: 14px; }
.region span { display: block; margin-top: 7px; color: var(--muted); font-size: 13px; line-height: 1.5; }
.r5 { grid-column: 1 / -1; }
.data-caution { display: grid; grid-template-columns: 180px 1fr; gap: 42px; margin-top: 24px; padding: 22px 24px; background: #e5e9df; border-left: 4px solid var(--blue); }
.data-caution b { text-transform: uppercase; font-size: 11px; letter-spacing: 1px; }
.data-caution p { font-size: 13px; }

.process { background: var(--ink); color: white; }
.process-line { list-style: none; display: grid; grid-template-columns: repeat(6, 1fr); padding: 0; margin: 0; border-top: 1px solid rgba(255,255,255,.24); }
.process-line li { position: relative; min-height: 310px; padding: 20px 18px 24px; border-right: 1px solid rgba(255,255,255,.18); }
.process-line li::before { content: ""; position: absolute; left: 0; top: -4px; width: 8px; height: 8px; background: var(--lime); border-radius: 50%; }
.process-line li > span { color: var(--copper-light); font: italic 20px Georgia, serif; }
.process-line b { display: block; margin-top: 46px; font: 500 24px Georgia, serif; }
.process-line p { margin-top: 13px; color: rgba(255,255,255,.62); font-size: 13px; }
.process-line small { position: absolute; bottom: 22px; left: 18px; right: 18px; color: var(--lime); font-size: 9px; letter-spacing: .7px; }
.process-notes { display: grid; grid-template-columns: repeat(3, 1fr); gap: 1px; margin-top: 48px; background: rgba(255,255,255,.16); }
.process-notes div { padding: 26px; background: var(--ink-2); }
.process-notes b { font: 500 19px Georgia, serif; }
.process-notes p { margin-top: 10px; color: rgba(255,255,255,.58); font-size: 13px; }

.fineness { background: var(--white); }
.size-ruler { display: grid; grid-template-columns: repeat(6, 1fr); gap: 12px; }
.ruler-axis, .ruler-track { grid-column: 1 / -1; display: grid; grid-template-columns: repeat(6, 1fr); }
.ruler-axis span { color: var(--muted); font-size: 11px; }
.ruler-axis span:not(:first-child) { text-align: center; }
.ruler-axis span:last-child { text-align: right; }
.ruler-track { position: relative; height: 34px; align-items: center; border-top: 2px solid var(--ink); }
.ruler-track i { width: 1px; height: 15px; background: var(--ink); }
.ruler-track i:last-child { justify-self: end; }
.size-ruler article { grid-column: calc(var(--start) + 1) / span var(--span); min-height: 260px; padding: 24px; background: #eef0e8; border-top: 5px solid var(--copper); }
.size-ruler article:nth-of-type(2) { border-color: var(--blue); }
.size-ruler article:nth-of-type(3) { border-color: #6f8f57; }
.size-ruler article:nth-of-type(4) { border-color: var(--ink); }
.size-ruler article > b { font-size: 11px; text-transform: uppercase; letter-spacing: 1px; }
.size-ruler h3 { margin-top: 24px; font-size: 25px; }
.size-ruler p { margin-top: 14px; font-size: 13px; }
.application-table-wrap, .table-wrap { margin-top: 60px; overflow-x: auto; border: 1px solid var(--line); }
table { width: 100%; border-collapse: collapse; min-width: 820px; background: white; }
th, td { padding: 17px 18px; border-bottom: 1px solid var(--line); text-align: left; vertical-align: top; }
th { background: var(--ink); color: white; font-size: 11px; text-transform: uppercase; letter-spacing: .8px; }
td { font-size: 13px; color: var(--muted); }
td:first-child { color: var(--ink); font-weight: 800; }

.selection { background: #e9ede6; }
.mill-matrix { border: 1px solid var(--ink); }
.matrix-row { display: grid; grid-template-columns: 180px repeat(3, 1fr); }
.matrix-row > * { padding: 18px; border-right: 1px solid var(--line); border-bottom: 1px solid var(--line); }
.matrix-row > *:last-child { border-right: 0; }
.matrix-row:last-child > * { border-bottom: 0; }
.matrix-row span { color: var(--ink); font-size: 12px; font-weight: 800; text-transform: uppercase; }
.matrix-row p { font-size: 13px; }
.matrix-head { background: var(--ink); color: white; }
.matrix-head > * { border-color: rgba(255,255,255,.2); }
.matrix-head span { color: var(--lime); }
.matrix-head b { font: 500 19px Georgia, serif; }
.decision-strip { display: flex; align-items: center; justify-content: space-between; gap: 30px; margin-top: 28px; padding: 24px 28px; background: var(--white); box-shadow: var(--shadow); }
.decision-strip p { font-size: 14px; }
.decision-strip a { flex: 0 0 auto; color: var(--copper); font-weight: 800; border-bottom: 1px solid; }

.crgm { background: #f8f8f4; }
.product-intro { display: grid; grid-template-columns: .82fr 1.18fr; gap: 68px; align-items: center; }
.product-intro h2 { margin-top: 20px; font-size: clamp(44px, 5vw, 72px); }
.product-intro > div > p:not(.chapter) { margin-top: 26px; font-size: 16px; }
.plain-list { padding: 0; margin: 30px 0 0; list-style: none; border-top: 1px solid var(--line); }
.plain-list li { padding: 11px 0; border-bottom: 1px solid var(--line); font-size: 13px; font-weight: 700; }
.plain-list li::before { content: "+"; margin-right: 12px; color: var(--copper); }
.product-figure { position: relative; min-height: 640px; background: #e2e7df; overflow: hidden; box-shadow: var(--shadow); }
.product-figure img { width: 100%; height: 640px; object-fit: contain; mix-blend-mode: multiply; }
.product-figure figcaption { position: absolute; left: 20px; right: 20px; bottom: 20px; padding: 14px 18px; background: rgba(23,37,34,.9); color: white; }
.product-figure figcaption span { display: block; color: var(--lime); font-size: 10px; text-transform: uppercase; }
.product-figure figcaption b { font: 500 18px Georgia, serif; }
.principle-layout { display: grid; grid-template-columns: .75fr 1.25fr; gap: 60px; align-items: center; margin-top: 120px; }
.principle-copy h3 { margin-top: 20px; font-size: clamp(35px, 4vw, 54px); }
.principle-copy p:not(.chapter) { margin-top: 22px; }
.principle-diagram { position: relative; min-height: 540px; background: var(--ink); border-radius: var(--radius); overflow: hidden; box-shadow: var(--shadow); }
.principle-diagram::before { content: ""; position: absolute; inset: 14%; border: 1px dashed rgba(255,255,255,.18); border-radius: 50%; }
.unit { position: absolute; width: 190px; min-height: 112px; padding: 18px; background: #f3f4ef; color: var(--ink); border-top: 4px solid var(--copper); box-shadow: 0 16px 30px rgba(0,0,0,.2); }
.unit small { color: var(--copper); font-weight: 800; }
.unit b, .unit span { display: block; }
.unit b { margin-top: 6px; font: 500 18px Georgia, serif; }
.unit span { margin-top: 5px; color: var(--muted); font-size: 11px; }
.u-classifier { left: 38%; top: 55px; }
.u-collector { right: 30px; top: 220px; }
.u-feed { left: 28px; bottom: 70px; }
.u-grind { left: 41%; bottom: 42px; }
.air-loop, .return-line { position: absolute; color: var(--lime); font-size: 10px; text-transform: uppercase; letter-spacing: 1px; }
.air-loop { right: 34px; top: 70px; }
.return-line { left: 31%; top: 250px; width: 35%; padding-top: 7px; border-top: 1px solid var(--copper-light); }
.advantage-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 1px; margin-top: 100px; background: var(--line); border: 1px solid var(--line); }
.advantage-grid article { min-height: 270px; padding: 26px; background: white; }
.advantage-grid span { color: var(--copper); font: italic 24px Georgia, serif; }
.advantage-grid h3 { margin-top: 30px; font-size: 26px; }
.advantage-grid p { margin-top: 14px; font-size: 13px; }

.models { background: var(--ink); color: white; }
.models .section-heading h2, .models .section-heading > p { color: white; }
.models .section-heading .chapter { color: var(--lime); }
.model-tabs { display: flex; border-bottom: 1px solid rgba(255,255,255,.2); }
.model-tabs button { min-width: 160px; padding: 16px 24px; border: 0; border-top: 3px solid transparent; background: transparent; color: rgba(255,255,255,.55); cursor: pointer; font-weight: 800; }
.model-tabs button[aria-selected="true"] { color: white; border-top-color: var(--lime); background: var(--ink-2); }
.model-readout { display: grid; grid-template-columns: repeat(4, 1fr); background: var(--ink-2); }
.model-readout div { padding: 24px; border-right: 1px solid rgba(255,255,255,.14); }
.model-readout span { display: block; color: rgba(255,255,255,.52); font-size: 10px; text-transform: uppercase; letter-spacing: 1px; }
.model-readout b { display: block; margin-top: 7px; font: 500 25px Georgia, serif; }
.models .table-wrap { border-color: rgba(255,255,255,.2); }
.models table { background: transparent; }
.models th { background: #0c1714; }
.models td { color: rgba(255,255,255,.66); border-color: rgba(255,255,255,.14); }
.models td:first-child { color: white; }
.spec-note { margin-top: 14px; color: rgba(255,255,255,.45); font-size: 12px; }

.materials { background: #eef1eb; }
.material-gallery { display: grid; grid-template-columns: repeat(6, 1fr); gap: 12px; }
.material-gallery figure { position: relative; min-width: 0; height: 390px; overflow: hidden; background: var(--ink); }
.material-gallery img { width: 100%; height: 100%; object-fit: cover; opacity: .82; transition: transform .45s ease, opacity .3s ease; }
.material-gallery figure:hover img { transform: scale(1.045); opacity: .95; }
.material-gallery figcaption { position: absolute; inset: auto 0 0; padding: 45px 14px 16px; color: white; background: linear-gradient(transparent, rgba(12,23,20,.95)); }
.material-gallery b, .material-gallery span { display: block; }
.material-gallery b { font: 500 20px Georgia, serif; }
.material-gallery span { color: rgba(255,255,255,.62); font-size: 10px; line-height: 1.35; }

.cases { background: var(--white); }
.case-layout { display: grid; grid-template-columns: .7fr 1.3fr; gap: 58px; align-items: start; }
.case-copy { position: sticky; top: 110px; }
.case-copy h2 { margin-top: 20px; font-size: clamp(40px, 4vw, 62px); }
.case-copy > p:not(.chapter) { margin-top: 24px; }
.case-copy dl { margin: 35px 0; border-top: 1px solid var(--line); }
.case-copy dl div { display: grid; grid-template-columns: 42px 1fr; gap: 14px; padding: 13px 0; border-bottom: 1px solid var(--line); }
.case-copy dt { color: var(--copper); font: italic 18px Georgia, serif; }
.case-copy dd b, .case-copy dd span { display: block; }
.case-copy dd span { color: var(--muted); font-size: 12px; }
.case-mosaic { display: grid; grid-template-columns: repeat(2, 1fr); gap: 16px; }
.case-mosaic figure { position: relative; min-height: 330px; overflow: hidden; }
.case-mosaic .case-large { grid-column: 1 / -1; min-height: 520px; }
.case-mosaic img { width: 100%; height: 100%; object-fit: cover; }
.case-mosaic figcaption { position: absolute; bottom: 0; left: 0; padding: 9px 13px; background: var(--ink); color: white; font-size: 11px; }

.spares { background: #31433e; color: white; }
.parts-layout { display: grid; grid-template-columns: .75fr 1.25fr; gap: 54px; }
.parts-list > div { padding: 18px 0; border-top: 1px solid rgba(255,255,255,.18); }
.parts-list b { font: 500 20px Georgia, serif; }
.parts-list p { margin-top: 6px; color: rgba(255,255,255,.55); font-size: 13px; }
.parts-assurance { margin-top: 28px; padding: 20px; color: var(--ink) !important; background: var(--lime); }
.parts-gallery { display: grid; grid-template-columns: repeat(2, 1fr); gap: 12px; }
.parts-gallery figure { position: relative; min-height: 240px; background: #eef1eb; overflow: hidden; }
.parts-gallery img { width: 100%; height: 100%; object-fit: contain; mix-blend-mode: multiply; }
.parts-gallery figcaption { position: absolute; right: 0; bottom: 0; padding: 7px 11px; background: var(--ink); font-size: 11px; }

.company { background: #f4f4ef; }
.company-lead { display: grid; grid-template-columns: 1.3fr .7fr; gap: 80px; align-items: end; }
.company-lead h2 { margin-top: 20px; font-size: clamp(45px, 5.4vw, 76px); }
.company-lead > p { padding-bottom: 10px; font-size: 16px; }
.company-gallery { display: grid; grid-template-columns: 1.1fr 1.35fr .8fr; gap: 14px; margin-top: 60px; }
.company-gallery figure { position: relative; min-height: 460px; overflow: hidden; }
.company-gallery img { width: 100%; height: 100%; object-fit: cover; }
.company-gallery figcaption { position: absolute; inset: auto 14px 14px; padding: 12px 14px; background: rgba(23,37,34,.9); color: white; }
.company-gallery figcaption span, .company-gallery figcaption b { display: block; }
.company-gallery figcaption span { color: var(--lime); font-size: 9px; text-transform: uppercase; letter-spacing: 1px; }
.company-gallery figcaption b { font: 500 16px Georgia, serif; }
.factory-strip { display: grid; grid-template-columns: repeat(5, 1fr); gap: 8px; margin-top: 8px; }
.factory-strip img { width: 100%; height: 150px; object-fit: cover; }
.cert-layout { display: grid; grid-template-columns: .7fr 1.3fr; gap: 60px; margin-top: 100px; }
.cert-copy h3 { margin-top: 20px; font-size: 38px; }
.cert-copy p:not(.chapter) { margin-top: 20px; }
.cert-gallery { display: grid; grid-template-columns: repeat(4, 1fr); gap: 12px; }
.cert-gallery figure { padding: 12px; background: white; box-shadow: 0 10px 35px rgba(20,35,31,.08); }
.cert-gallery img { width: 100%; height: 230px; object-fit: contain; }
.cert-gallery figcaption { padding-top: 8px; font-size: 10px; text-align: center; }

.service { background: var(--white); }
.service-grid { display: grid; grid-template-columns: .78fr 1.22fr; gap: 70px; }
.service-grid .section-heading { display: block; margin: 0; }
.service-grid .section-heading h2 { margin-top: 20px; }
.service-grid .section-heading > p:last-child { margin-top: 24px; }
.service-steps { list-style: none; padding: 0; margin: 0; border-top: 1px solid var(--ink); }
.service-steps li { display: grid; grid-template-columns: 190px 1fr; gap: 20px; padding: 18px 0; border-bottom: 1px solid var(--line); }
.service-steps b { font-size: 12px; text-transform: uppercase; }
.service-steps span { color: var(--muted); font-size: 13px; }
.visitor-heading { display: flex; justify-content: space-between; align-items: end; gap: 30px; margin-top: 100px; }
.visitor-heading h3 { max-width: 700px; font-size: 40px; }
.visitor-reel { display: grid; grid-template-columns: repeat(5, 1fr); gap: 9px; margin-top: 30px; }
.visitor-reel figure { position: relative; height: 270px; overflow: hidden; }
.visitor-reel img { width: 100%; height: 100%; object-fit: cover; }
.visitor-reel figcaption { position: absolute; left: 8px; bottom: 8px; padding: 5px 8px; background: var(--paper); color: var(--ink); font-size: 10px; font-weight: 800; }

.faq { background: #e8ece4; }
.faq-layout { display: grid; grid-template-columns: .55fr 1.45fr; gap: 80px; }
.faq-intro { position: sticky; top: 110px; align-self: start; }
.faq-intro h2 { margin-top: 20px; font-size: clamp(42px, 4vw, 60px); }
.faq-intro > p:last-child { margin-top: 20px; }
.faq-list { border-top: 1px solid var(--ink); }
.faq-list details { border-bottom: 1px solid #aeb9b0; }
.faq-list summary { position: relative; list-style: none; padding: 20px 50px 20px 0; font-weight: 800; cursor: pointer; }
.faq-list summary::-webkit-details-marker { display: none; }
.faq-list summary::after { content: "+"; position: absolute; right: 8px; top: 16px; font: 500 24px Georgia, serif; color: var(--copper); }
.faq-list details[open] summary::after { content: "-"; }
.faq-list details p { max-width: 800px; padding: 0 50px 22px 0; font-size: 14px; }

.contact { background: var(--copper); color: var(--ink); }
.contact-layout { display: grid; grid-template-columns: .8fr 1.2fr; gap: 70px; }
.contact-copy h2 { margin-top: 20px; color: var(--ink); font-size: clamp(45px, 5vw, 70px); }
.contact-copy > p:not(.chapter) { margin-top: 24px; color: rgba(23,37,34,.75); }
.contact .chapter { color: var(--ink); }
.contact-points { display: grid; gap: 1px; margin-top: 40px; background: rgba(23,37,34,.24); }
.contact-points a, .contact-points address { display: grid; padding: 14px 16px; background: rgba(255,255,255,.16); font-style: normal; }
.contact-points span { font-size: 9px; font-weight: 800; text-transform: uppercase; letter-spacing: 1px; }
.contact-points b { font-size: 13px; }
.inquiry-form { padding: 34px; background: var(--paper); box-shadow: var(--shadow); }
.form-row { display: grid; grid-template-columns: repeat(2, 1fr); gap: 16px; }
.inquiry-form label { display: grid; gap: 7px; margin-bottom: 16px; font-size: 11px; font-weight: 800; text-transform: uppercase; letter-spacing: .5px; }
.inquiry-form input, .inquiry-form textarea { width: 100%; border: 1px solid var(--line); border-radius: 0; padding: 13px 14px; background: white; color: var(--ink); outline: none; text-transform: none; }
.inquiry-form input:focus, .inquiry-form textarea:focus { border-color: var(--copper); box-shadow: 0 0 0 2px rgba(199,99,62,.15); }
.form-actions { display: flex; gap: 12px; }
.inquiry-form small { display: block; margin-top: 16px; color: var(--muted); font-size: 10px; }

.sources { padding: 70px 0; background: #dfe5dd; }
.sources-layout { display: grid; grid-template-columns: .6fr 1.4fr; gap: 70px; }
.sources h2 { margin-top: 15px; font-size: 42px; }
.sources ul { padding: 0; margin: 0; list-style: none; border-top: 1px solid var(--ink); }
.sources li { display: grid; grid-template-columns: .8fr 1.2fr; gap: 18px; padding: 13px 0; border-bottom: 1px solid #aeb9b0; }
.sources a { font-weight: 800; font-size: 12px; text-decoration: underline; text-decoration-color: var(--copper); text-underline-offset: 3px; }
.sources span { color: var(--muted); font-size: 12px; }

.site-footer { padding: 75px 0 20px; background: #101c19; color: white; }
.footer-grid { display: grid; grid-template-columns: 1.4fr repeat(3, 1fr); gap: 60px; }
.footer-brand img { width: 154px; padding: 6px 8px; background: #fff; }
.footer-brand p { max-width: 310px; margin-top: 18px; color: rgba(255,255,255,.45); font-size: 12px; }
.footer-grid > div:not(.footer-brand) { display: grid; align-content: start; gap: 8px; }
.footer-grid b { margin-bottom: 7px; color: var(--lime); font-size: 11px; text-transform: uppercase; letter-spacing: 1px; }
.footer-grid a { color: rgba(255,255,255,.62); font-size: 12px; }
.footer-grid a:hover { color: white; }
.footer-bottom { display: flex; gap: 25px; padding-top: 22px; margin-top: 55px; border-top: 1px solid rgba(255,255,255,.14); color: rgba(255,255,255,.38); font-size: 10px; }
.footer-bottom a:first-of-type { margin-left: auto; }

.whatsapp { position: fixed; z-index: 90; right: 22px; bottom: 22px; display: flex; align-items: center; gap: 9px; padding: 8px 14px 8px 8px; border-radius: 28px; background: #1f9d61; color: white; box-shadow: 0 12px 30px rgba(0,0,0,.22); }
.whatsapp span { display: grid; place-items: center; width: 34px; height: 34px; border: 1px solid rgba(255,255,255,.5); border-radius: 50%; font-size: 10px; font-weight: 900; }
.whatsapp b { font-size: 12px; }
.video-dialog { width: min(980px, calc(100vw - 32px)); padding: 0; border: 0; border-radius: var(--radius); background: #09120f; color: white; box-shadow: 0 25px 80px rgba(0,0,0,.5); }
.video-dialog::backdrop { background: rgba(7,15,13,.82); backdrop-filter: blur(6px); }
.video-stage { position: relative; background: black; }
.video-dialog video { width: 100%; max-height: 72vh; display: block; background: black; }
.video-dialog > button { position: absolute; z-index: 2; top: 10px; right: 10px; border: 0; padding: 8px 11px; background: rgba(9,18,15,.84); color: white; cursor: pointer; font-size: 11px; }
.video-dialog > div { display: grid; gap: 2px; padding: 16px 20px; }
.video-dialog > div b { font: 500 19px Georgia, serif; }
.video-dialog > div span { color: rgba(255,255,255,.5); font-size: 11px; }

@media (max-width: 1080px) {
  .main-nav { gap: 15px; }
  .main-nav a:nth-child(2), .main-nav a:nth-child(5) { display: none; }
  .section-heading { grid-template-columns: 130px 1fr; }
  .section-heading > p:last-child { grid-column: 2; }
  .intro-grid { grid-template-columns: 130px 1fr; }
  .margin-note { grid-column: 2; }
  .process-line { grid-template-columns: repeat(3, 1fr); }
  .process-line li { border-bottom: 1px solid rgba(255,255,255,.18); }
  .material-gallery { grid-template-columns: repeat(3, 1fr); }
  .material-gallery figure { height: 320px; }
  .company-gallery { grid-template-columns: 1fr 1fr; }
  .company-gallery .machine { grid-column: 1 / -1; min-height: 340px; }
  .factory-strip { grid-template-columns: repeat(3, 1fr); }
  .cert-gallery { grid-template-columns: repeat(2, 1fr); }
  .visitor-reel { grid-template-columns: repeat(3, 1fr); }
}

@media (max-width: 800px) {
  :root { --shell: min(100% - 30px, 720px); }
  .section { padding: 82px 0; }
  .header-inner { height: 68px; width: calc(100vw - 24px); }
  .brand img { width: 112px; }
  .brand span, .header-contact { display: none; }
  .menu-button { display: block; margin-left: auto; }
  .main-nav { position: fixed; inset: 68px 0 auto; display: none; padding: 14px 15px 24px; background: var(--paper); color: var(--ink); box-shadow: var(--shadow); }
  .main-nav.open { display: grid; }
  .main-nav a, .main-nav a:nth-child(2), .main-nav a:nth-child(5) { display: block; padding: 11px 0; border-bottom: 1px solid var(--line); }
  .hero { min-height: 760px; }
  .hero-content { width: calc(100vw - 30px); padding-top: 165px; }
  .hero h1 { font-size: clamp(58px, 19vw, 92px); }
  .hero-shade { background: linear-gradient(90deg, rgba(9,23,20,.9), rgba(9,23,20,.35)), linear-gradient(0deg, rgba(9,23,20,.8), transparent 60%); }
  .hero-index { width: 100%; grid-template-columns: repeat(2, 1fr); }
  .hero-index div { padding: 12px 15px; border-top: 1px solid rgba(255,255,255,.14); }
  .hero-index dd { font-size: 18px; }
  .section-heading, .intro-grid, .distribution-layout, .product-intro, .principle-layout, .case-layout, .parts-layout, .company-lead, .cert-layout, .service-grid, .faq-layout, .contact-layout, .sources-layout { grid-template-columns: 1fr; gap: 34px; }
  .section-heading > p:last-child, .margin-note { grid-column: auto; }
  .section-heading { margin-bottom: 40px; }
  .section-heading h2 { font-size: 42px; }
  .process-line { grid-template-columns: repeat(2, 1fr); }
  .process-notes, .advantage-grid { grid-template-columns: 1fr; }
  .size-ruler { display: block; }
  .ruler-axis, .ruler-track { display: none; }
  .size-ruler article { margin-bottom: 10px; min-height: auto; }
  .matrix-row { grid-template-columns: 120px repeat(3, minmax(190px, 1fr)); }
  .mill-matrix { overflow-x: auto; }
  .decision-strip { align-items: flex-start; flex-direction: column; }
  .product-figure, .product-figure img { min-height: 450px; height: 450px; }
  .principle-diagram { min-height: 650px; }
  .u-classifier { left: 20px; top: 40px; }
  .u-collector { right: 20px; top: 210px; }
  .u-feed { left: 20px; bottom: 160px; }
  .u-grind { right: 20px; left: auto; bottom: 30px; }
  .return-line { top: 360px; }
  .model-readout { grid-template-columns: repeat(2, 1fr); }
  .material-gallery { grid-template-columns: repeat(2, 1fr); }
  .case-copy, .faq-intro { position: static; }
  .company-gallery { grid-template-columns: 1fr; }
  .company-gallery .machine { grid-column: auto; }
  .factory-strip, .visitor-reel { grid-template-columns: repeat(2, 1fr); }
  .footer-grid { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 520px) {
  .section { padding: 68px 0; }
  .hero-actions, .form-actions { align-items: stretch; flex-direction: column; }
  .hero-actions { align-items: flex-start; gap: 18px; }
  .hero-lead { font-size: 16px; }
  .intro-band { padding: 58px 0; }
  .world-field { grid-template-columns: 1fr; }
  .field-title, .r5 { grid-column: auto; }
  .data-caution { grid-template-columns: 1fr; gap: 8px; }
  .process-line { grid-template-columns: 1fr; }
  .process-line li { min-height: 245px; }
  .process-line b { margin-top: 25px; }
  .model-tabs button { min-width: 0; flex: 1; padding-inline: 8px; }
  .model-readout { grid-template-columns: 1fr; }
  .material-gallery, .parts-gallery, .company-gallery, .factory-strip, .cert-gallery, .visitor-reel, .footer-grid, .form-row { grid-template-columns: 1fr; }
  .material-gallery figure { height: 300px; }
  .case-mosaic { grid-template-columns: 1fr; }
  .case-mosaic .case-large { grid-column: auto; min-height: 360px; }
  .case-mosaic figure { min-height: 300px; }
  .company-gallery figure { min-height: 340px; }
  .factory-strip img { height: 210px; }
  .service-steps li, .sources li { grid-template-columns: 1fr; gap: 4px; }
  .visitor-heading { display: block; }
  .visitor-heading h3 { margin-top: 15px; font-size: 34px; }
  .inquiry-form { padding: 22px 18px; }
  .footer-bottom { flex-wrap: wrap; }
  .footer-bottom a:first-of-type { margin-left: 0; }
  .whatsapp { right: 12px; bottom: 12px; padding-right: 8px; }
  .whatsapp b { display: none; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { transition-duration: .01ms !important; animation-duration: .01ms !important; }
}