:root {
  --red: #df1713;
  --red-deep: #bb0e0a;
  --brand-red: #e5161d;
  --brand-red-hover: #c91017;
  --cta-dark-red-start: #5f090e;
  --cta-dark-red-mid: #96171c;
  --cta-dark-red-end: #650a10;
  --surface-warm: #f4f1ec;
  --surface-warm-light: #f8f6f2;
  --text-primary: #151515;
  --text-secondary: #66625e;
  --border-light: rgba(20,20,20,.06);
  --yellow: #f2c23a;
  --ink: #111315;
  --paper: #f1efeb;
  --paper-soft: #f7f5f1;
  --line: #d5d2cc;
  --muted: #6c6b68;
  --dark: #101214;
  --product-dark: #0b0e11;
  --container: 1280px;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; scroll-padding-top: 88px; -webkit-text-size-adjust: 100%; text-size-adjust: 100%; }
body { margin: 0; background: var(--paper); color: var(--ink); font-family: "Microsoft YaHei", "PingFang SC", "Noto Sans SC", Arial, sans-serif; -webkit-font-smoothing: antialiased; }
body.menu-open { overflow: hidden; }
img { display: block; max-width: 100%; }
a { color: inherit; text-decoration: none; }
button, a { -webkit-tap-highlight-color: transparent; }
a:focus-visible, button:focus-visible { outline: 3px solid var(--yellow); outline-offset: 4px; }
section { scroll-margin-top: 88px; }
.container { width: min(calc(100% - 64px), var(--container)); margin-inline: auto; }
.skip-link { position: fixed; top: -80px; left: 16px; z-index: 999; padding: 12px 18px; background: var(--yellow); color: var(--ink); font-weight: 800; }
.skip-link:focus { top: 16px; }

.site-header { position: sticky; top: 0; z-index: 100; background: #fff; border-bottom: 1px solid #e3e3e1; transition: box-shadow .2s ease; }
.site-header.is-scrolled { box-shadow: 0 12px 40px rgba(10,12,14,.12); }
.header-inner { width: min(calc(100% - 64px), 1360px); min-height: 88px; margin-inline: auto; display: flex; align-items: center; justify-content: space-between; gap: 48px; }
.brand { min-width: 0; display: flex; align-items: center; gap: 18px; }
.brand > img { width: 170px; height: 48px; object-fit: contain; }
.brand-copy { display: flex; flex-direction: column; gap: 5px; padding-left: 18px; border-left: 1px solid #dededb; }
.brand-copy strong { white-space: nowrap; font-size: 15px; }
.brand-copy small { color: #8a8a87; font-family: Arial, sans-serif; font-size: 8px; letter-spacing: .02em; }
.site-nav { align-self: stretch; display: flex; align-items: stretch; gap: 8px; }
.site-nav a { position: relative; min-width: 94px; display: grid; place-items: center; padding: 0 16px; font-size: 16px; font-weight: 800; }
.site-nav a::after { position: absolute; right: 16px; bottom: 0; left: 16px; height: 3px; background: var(--red); content: ""; transform: scaleX(0); transition: transform .18s ease; }
.site-nav a:hover::after, .site-nav a.is-active::after { transform: scaleX(1); }
.menu-toggle { display: none; min-height: 44px; padding: 0; border: 0; background: transparent; color: var(--ink); font: inherit; font-size: 15px; font-weight: 800; }

.eyebrow { margin: 0 0 24px; font-family: Arial, sans-serif; font-size: 11px; font-weight: 900; letter-spacing: .24em; }
.eyebrow-yellow { color: var(--yellow); }
.eyebrow-red { color: var(--red); }
.button { min-height: 56px; display: inline-flex; align-items: center; justify-content: center; padding: 0 32px; border: 1px solid currentColor; font-size: 14px; font-weight: 800; transition: background .18s ease, color .18s ease, border-color .18s ease; }
.button-red { border-color: var(--red); background: var(--red); color: #fff; }
.button-red:hover { border-color: var(--red-deep); background: var(--red-deep); }
.button-dark-outline { border-color: rgba(255,255,255,.35); color: #fff; }
.button-dark-outline:hover { border-color: #fff; background: #fff; color: var(--dark); }
.button-light { border-color: #fff; background: #fff; color: var(--red-deep); }
.button-light:hover { border-color: var(--yellow); background: var(--yellow); color: var(--ink); }

.hero { position: relative; min-height: 550px; overflow: hidden; background: var(--dark); color: #fff; }
.hero-grid { position: absolute; inset: 0; width: 100%; height: 100%; object-fit: cover; opacity: .8; }
.hero-image { position: absolute; inset: 0 0 0 auto; width: 44%; margin: 0; overflow: hidden; }
.hero-image img { width: 100%; height: 100%; object-fit: cover; object-position: 55% center; filter: brightness(.5) saturate(.82); }
.hero-inner { position: relative; z-index: 2; width: min(calc(100% - 64px), 1500px); min-height: 550px; margin-inline: auto; display: flex; align-items: center; }
.hero-copy { width: min(790px, 61%); margin-left: 31%; padding: 72px 0 66px; }
.hero h1 { margin: 0; font-size: clamp(64px, 5.2vw, 102px); font-weight: 900; line-height: .96; letter-spacing: -.06em; }
.hero h1 > span, .hero h1 > em { display: block; }
.hero h1 em > span { display: inline; }
.hero h1 em { margin-top: 18px; color: transparent; font-style: normal; -webkit-text-stroke: 1.5px rgba(255,255,255,.86); }
.hero-intro { max-width: 720px; margin: 34px 0 0; color: #c5c5c4; font-size: 15px; line-height: 1.95; }
.hero-actions, .statement-actions { display: flex; flex-wrap: wrap; gap: 16px; margin-top: 38px; }

.category-rail { position: relative; z-index: 3; background: var(--red); color: #fff; }
.category-inner { width: min(100%, 1360px); min-height: 86px; margin-inline: auto; display: grid; grid-template-columns: repeat(6, 1fr); }
.category-inner > * { min-width: 0; display: flex; align-items: center; justify-content: center; padding: 0 20px; border-right: 1px solid rgba(255,255,255,.2); color: rgba(255,255,255,.94); font-size: clamp(18px, 1.08vw, 20px); font-weight: 800; letter-spacing: .025em; text-shadow: 0 2px 10px rgba(76,0,4,.18); }
.category-inner > *:first-child { border-left: 1px solid rgba(255,255,255,.18); }
.category-label { position: relative; flex-direction: column; align-items: flex-start; justify-content: center; gap: 5px; padding-left: 54px; color: #151515; background: transparent; font-size: clamp(21px, 1.22vw, 23px); font-weight: 900; letter-spacing: -.02em; text-align: left; text-shadow: none; }
.category-label strong { font: inherit; line-height: 1.05; }
.category-label > span { display: none; }
.category-label::before { color: rgba(21,21,21,.62); content: "CORE PRODUCTS"; font-family: Arial, sans-serif; font-size: 9px; font-weight: 900; letter-spacing: .2em; line-height: 1; pointer-events: none; }
.category-label::after { width: 44px; height: 3px; background: #151515; content: ""; pointer-events: none; }
.category-inner a { transition: background .18s ease, color .18s ease, letter-spacing .18s ease; }
.category-inner a:hover { color: #fff; background: var(--red-deep); letter-spacing: .055em; }

.product-section { padding: 112px 0 118px; background: var(--paper); }
.section-heading { display: grid; grid-template-columns: minmax(0, 1fr) 360px; align-items: end; gap: 90px; margin-bottom: 56px; }
.section-heading h2, .about-heading h2, .contact h2 { margin: 0; font-size: clamp(44px, 4vw, 66px); line-height: 1.12; letter-spacing: -.045em; }
.section-heading > p { margin: 0 0 8px; color: var(--muted); font-size: 14px; line-height: 1.9; }
.product-heading h2 { max-width: 760px; }
.product-grid { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); border-top: 1px solid var(--line); border-left: 1px solid var(--line); }
.product-card { min-height: 350px; display: flex; flex-direction: column; padding: 40px; background: #fff; border-right: 1px solid var(--line); border-bottom: 1px solid var(--line); transition: transform .18s ease, box-shadow .18s ease; }
.product-card:hover { position: relative; z-index: 1; transform: translateY(-4px); box-shadow: 0 22px 54px rgba(17,19,21,.1); }
.product-card-featured { position: relative; isolation: isolate; overflow: hidden; grid-column: span 2; background: var(--product-dark) url("assets/images/products/cable-accessories-optimized.jpg") right center / auto 112% no-repeat; color: #fff; }
.product-card-featured::before { position: absolute; inset: 0; z-index: 0; background: linear-gradient(90deg, rgba(11,14,17,.99) 0%, rgba(11,14,17,.96) 43%, rgba(11,14,17,.55) 58%, rgba(11,14,17,.08) 82%); content: ""; }
.product-card-featured > * { position: relative; z-index: 1; }
.product-code { display: flex; justify-content: flex-start; gap: 22px; padding-bottom: 24px; border-bottom: 1px solid rgba(120,120,120,.35); }
.product-code small { color: #8c8c8a; font-size: 10px; }
.product-card-featured .product-code, .product-card-tubing .product-code, .product-card-joint .product-code, .product-card-branch .product-code, .product-card-equipment .product-code { justify-content: flex-start; align-items: center; gap: 18px; }
.product-card-featured .product-code small, .product-card-tubing .product-code small, .product-card-joint .product-code small, .product-card-branch .product-code small, .product-card-equipment .product-code small { padding: 7px 12px; color: #fff; border: 1px solid rgba(232,24,20,.58); border-radius: 999px; background: rgba(232,24,20,.17); box-shadow: 0 0 18px rgba(232,24,20,.2); font-size: 12px; font-weight: 800; letter-spacing: .06em; text-shadow: 0 1px 6px rgba(0,0,0,.9); }
.product-card h3 { max-width: 660px; margin: 46px 0 18px; font-size: clamp(28px, 2.5vw, 44px); line-height: 1.18; }
.product-card p { max-width: 700px; margin: 0; color: #777; font-size: 13px; line-height: 1.9; }
.product-card-featured p { color: #a8a9aa; }
.product-card-featured h3, .product-card-featured p { max-width: 54%; }
.product-card a { width: max-content; margin-top: auto; padding-top: 34px; color: var(--red); border-bottom: 1px solid currentColor; font-size: 12px; font-weight: 800; }
.product-card-featured a { color: var(--yellow); }
.product-card-tubing { position: relative; isolation: isolate; overflow: hidden; padding: 40px; background: var(--product-dark); color: #fff; }
.product-card-tubing::before { display: none; }
.product-card-tubing > * { position: relative; z-index: 1; }
.tubing-visual { position: relative; height: 148px; margin: 18px -22px 0; overflow: hidden; border-bottom: 1px solid rgba(255,255,255,.08); }
.tubing-visual img { position: absolute; top: 0; height: 100%; min-width: 0; min-height: 0; max-width: none; max-height: 100%; display: block; object-fit: contain; filter: none; }
.tubing-visual-rolls { left: 8%; z-index: 2; width: 44%; object-position: left center; }
.tubing-visual-straight { right: 6%; z-index: 1; width: 64%; object-position: right center; }
.product-card-tubing h3 { max-width: 100%; margin: 18px 0 10px; font-size: clamp(25px, 2vw, 32px); line-height: 1.14; }
.product-card-tubing p { max-width: 100%; color: #c3c4c5; font-size: 12px; line-height: 1.7; text-shadow: none; }
.product-card-tubing a { color: var(--yellow); }
.product-card-tubing a { padding-top: 16px; }
.product-card-joint { position: relative; isolation: isolate; overflow: hidden; background: var(--product-dark); color: #fff; }
.product-card-joint .joint-visual { height: 150px; margin: 18px -22px 0; overflow: hidden; border-bottom: 1px solid rgba(255,255,255,.08); }
.product-card-joint .joint-visual img { width: 100%; height: 100%; display: block; object-fit: cover; object-position: center; transform: scale(.86); transform-origin: center; filter: none; mix-blend-mode: lighten; }
.product-card-joint h3 { margin: 20px 0 10px; font-size: clamp(24px, 2vw, 31px); line-height: 1.16; }
.product-card-joint p { color: #c3c4c5; font-size: 12px; line-height: 1.7; }
.product-card-joint a { padding-top: 18px; color: var(--yellow); }
.product-card-branch { position: relative; isolation: isolate; overflow: hidden; background: var(--product-dark); color: #fff; }
.product-card-branch .branch-visual { height: 150px; margin: 18px -22px 0; overflow: hidden; border-bottom: 1px solid rgba(255,255,255,.08); }
.product-card-branch .branch-visual img { width: 100%; height: 100%; display: block; object-fit: contain; object-position: center; transform: scale(1.06); transform-origin: center; filter: none; mix-blend-mode: lighten; }
.product-card-branch h3 { margin: 20px 0 10px; font-size: clamp(24px, 2vw, 31px); line-height: 1.16; }
.product-card-branch p { color: #c3c4c5; font-size: 12px; line-height: 1.7; }
.product-card-branch a { padding-top: 18px; color: var(--yellow); }
.product-card-equipment { position: relative; isolation: isolate; overflow: hidden; background: var(--product-dark); color: #fff; }
.product-card-equipment .equipment-visual { height: 150px; margin: 18px -22px 0; overflow: hidden; border-bottom: 1px solid rgba(255,255,255,.08); }
.product-card-equipment .equipment-visual img { width: 100%; height: 100%; display: block; object-fit: cover; object-position: center 52%; transform: scale(.86); transform-origin: center; filter: none; mix-blend-mode: lighten; }
.product-card-equipment h3 { margin: 20px 0 10px; font-size: clamp(24px, 2vw, 31px); line-height: 1.16; }
.product-card-equipment p { color: #c3c4c5; font-size: 12px; line-height: 1.7; }
.product-card-equipment a { padding-top: 18px; color: var(--yellow); }

.statement { position: relative; min-height: 690px; display: flex; align-items: center; overflow: hidden; background: var(--dark); color: #fff; }
.statement::after { content: ""; position: absolute; inset: 0; background: linear-gradient(90deg, rgba(9,11,13,.98) 0%, rgba(9,11,13,.9) 31%, rgba(9,11,13,.64) 52%, rgba(9,11,13,.16) 78%, rgba(9,11,13,.08) 100%); }
.statement-visual { position: absolute; inset: 0; width: 100%; height: 100%; object-fit: cover; object-position: center; opacity: .88; }
.statement-inner { position: relative; z-index: 1; padding-left: 18%; }
.statement h2 { margin: 0; font-size: clamp(62px, 6.6vw, 112px); line-height: .94; letter-spacing: -.055em; }
.statement h2 > span, .statement h2 > em { display: block; }
.statement h2 em > span { display: inline; }
.statement h2 em { margin-top: 20px; color: transparent; font-style: normal; -webkit-text-stroke: 1.5px rgba(255,255,255,.82); }
.statement-inner > p:not(.eyebrow) { max-width: 760px; margin: 34px 0 0; color: #bcbdbd; font-size: 15px; line-height: 1.95; }

.applications { position: relative; overflow: hidden; padding: 118px 0 126px; background: var(--dark) url("assets/images/industrial-grid-dark-optimized.jpg") center / cover no-repeat; color: #fff; }
.applications::before { position: absolute; inset: 0; background: rgba(9,11,13,.78); content: ""; }
.applications-inner { position: relative; z-index: 1; display: grid; grid-template-columns: minmax(0, 1.3fr) minmax(280px, .7fr); gap: 38px 90px; }
.applications-copy h2 { max-width: 760px; margin: 0; font-size: clamp(45px, 4.2vw, 70px); line-height: 1.12; letter-spacing: -.045em; }
.applications-copy > p:last-child { max-width: 670px; margin: 30px 0 0; color: #c3c4c4; font-size: 16px; line-height: 1.95; }
.applications-note { align-self: end; margin: 0 0 8px; padding-left: 28px; border-left: 3px solid var(--red); color: #c3c4c4; font-size: 16px; line-height: 1.85; }
.application-gallery { grid-column: 1 / -1; display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); margin-top: 22px; border-top: 1px solid rgba(255,255,255,.24); border-left: 1px solid rgba(255,255,255,.24); }
.application-card { position: relative; min-height: 520px; overflow: hidden; border-right: 1px solid rgba(255,255,255,.24); border-bottom: 1px solid rgba(255,255,255,.24); background: #17191b; }
.application-card::after { position: absolute; inset: 0; background: linear-gradient(180deg, rgba(8,10,12,.04) 28%, rgba(8,10,12,.92) 100%); content: ""; transition: background .28s ease; }
.application-card img { width: 100%; height: 100%; object-fit: cover; object-position: center; transition: transform .48s cubic-bezier(.2,.65,.25,1), filter .3s ease; }
.application-card-content { position: absolute; right: 0; bottom: 0; left: 0; z-index: 1; padding: 34px 30px 32px; }
.application-card-content > span { color: var(--yellow); font-family: Arial, sans-serif; font-size: 11px; font-weight: 900; letter-spacing: .18em; }
.application-card h3 { margin: 15px 0 12px; font-size: 32px; line-height: 1.2; }
.application-card p { margin: 0; color: #d1d2d2; font-size: 15px; line-height: 1.75; }
.application-card:hover img { transform: scale(1.045); filter: saturate(1.08) contrast(1.04); }
.application-card:hover::after { background: linear-gradient(180deg, rgba(8,10,12,.02) 18%, rgba(116,10,8,.9) 100%); }

.home-cta { padding: 62px 0; background: linear-gradient(110deg, var(--cta-dark-red-start) 0%, #7d1016 38%, var(--cta-dark-red-mid) 62%, var(--cta-dark-red-end) 100%); color: #fff; }
.home-cta-inner { display: flex; align-items: center; justify-content: space-between; gap: 64px; }
.home-cta .eyebrow { margin-bottom: 16px; color: #f0c84b; }
.home-cta h2 { max-width: 780px; margin: 0; font-size: clamp(34px, 3.4vw, 54px); line-height: 1.18; letter-spacing: -.04em; }
.home-cta-actions { display: flex; flex-wrap: wrap; justify-content: flex-end; gap: 14px; }
.home-cta .button { transition: background .2s ease, color .2s ease, border-color .2s ease, transform .2s ease; }
.home-cta .button-light { border-color: #fff; background: #fff; color: #c9151c; }
.home-cta .button-light:hover { border-color: #f3f1ee; background: #f3f1ee; color: #a90f15; transform: translateY(-1px); }
.home-cta .button-dark-outline { border-color: rgba(255,255,255,.38); background: transparent; color: #fff; }
.home-cta .button-dark-outline:hover { border-color: rgba(255,255,255,.7); background: rgba(255,255,255,.1); color: #fff; transform: translateY(-1px); }

.catalog-hero { position: relative; min-height: 430px; display: flex; align-items: center; overflow: hidden; background: var(--dark) url("assets/images/industrial-grid-dark-optimized.jpg") center / cover no-repeat; color: #fff; }
.catalog-hero::before { position: absolute; inset: 0; background: linear-gradient(90deg, rgba(8,10,12,.98) 0%, rgba(8,10,12,.82) 54%, rgba(115,11,9,.48) 100%); content: ""; }
.catalog-hero::after { position: absolute; top: 0; right: 8%; width: 25%; height: 100%; border-right: 1px solid rgba(255,255,255,.12); border-left: 1px solid rgba(255,255,255,.12); content: ""; transform: skewX(-18deg); }
.catalog-hero-inner { position: relative; z-index: 1; padding-block: 78px; }
.catalog-hero h1 { max-width: 900px; margin: 0; font-size: clamp(62px, 7vw, 108px); line-height: .95; letter-spacing: -.06em; }
.catalog-hero-inner > p:last-child { max-width: 720px; margin: 30px 0 0; color: #c7c8c9; font-size: 17px; line-height: 1.9; }
.catalog { padding: 108px 0 120px; background: var(--paper); }
.catalog-heading { margin-bottom: 54px; }
.catalog-heading h2 { max-width: 880px; margin: 0; font-size: clamp(44px, 4.4vw, 70px); line-height: 1.1; letter-spacing: -.045em; }
.catalog-list { border-top: 1px solid var(--line); }
.catalog-item { min-height: 480px; display: grid; grid-template-columns: .88fr 1.12fr; border-right: 1px solid var(--line); border-bottom: 1px solid var(--line); border-left: 1px solid var(--line); background: #fff; scroll-margin-top: 156px; }
.catalog-item:nth-child(even) { grid-template-columns: 1.12fr .88fr; }
.catalog-item:nth-child(even) .catalog-item-copy { order: 2; }
.catalog-item-copy { position: relative; display: flex; flex-direction: column; align-items: flex-start; padding: 52px 54px 48px; }
.catalog-item-copy::before { position: absolute; top: -1px; left: 54px; width: 82px; height: 4px; background: var(--red); content: ""; }
.catalog-item-copy > span { color: var(--red); font-family: Arial, sans-serif; font-size: 11px; font-weight: 900; letter-spacing: .2em; }
.catalog-item h2 { margin: 34px 0 20px; font-size: clamp(36px, 3.2vw, 54px); line-height: 1.08; letter-spacing: -.04em; }
.catalog-item-copy > p { max-width: 580px; margin: 0; color: #65696d; font-size: 15px; line-height: 1.9; }
.catalog-item ul { display: flex; flex-wrap: wrap; gap: 8px; margin: 28px 0 0; padding: 0; list-style: none; }
.catalog-item li { padding: 7px 11px; border: 1px solid #ddd9d2; color: #555b60; font-size: 12px; font-weight: 700; }
.catalog-item a { margin-top: auto; padding-top: 34px; color: var(--red); border-bottom: 1px solid currentColor; font-size: 13px; font-weight: 800; }
.catalog-item figure { min-height: 420px; margin: 0; overflow: hidden; background: var(--product-dark); }
.catalog-item figure img { width: 100%; height: 100%; object-fit: cover; transition: transform .4s ease; }
.catalog-item:first-child figure img { object-fit: contain; }
.catalog-item:hover figure img { transform: scale(1.025); }

.page-hero { position: relative; min-height: 430px; display: flex; align-items: center; overflow: hidden; background: var(--dark); color: #fff; }
.page-hero > img { position: absolute; inset: 0; width: 100%; height: 100%; object-fit: cover; opacity: .9; }
.page-hero-about::after, .page-hero-contact::after { position: absolute; inset: 0; background: rgba(8,10,12,.18); content: ""; }
.page-hero-inner { position: relative; z-index: 1; padding-top: 30px; }
.page-hero h1 { margin: 0; font-size: clamp(62px, 7vw, 108px); line-height: .95; letter-spacing: -.06em; }
.page-hero-inner > p:last-child { max-width: 760px; margin: 32px 0 0; color: #c4c5c5; font-size: 18px; line-height: 1.9; }
.page-subnav { position: sticky; top: 88px; z-index: 70; background: #fff; border-bottom: 1px solid #e2e2df; }
.page-subnav-inner { min-height: 68px; display: flex; align-items: stretch; }
.page-subnav a { min-width: 150px; display: grid; place-items: center; padding: 0 22px; border-right: 1px solid #e2e2df; font-size: 16px; font-weight: 800; }
.page-subnav a:first-child { border-left: 1px solid #e2e2df; }
.page-subnav a:hover { background: #fff4f3; color: var(--red); }
.about-page-section { scroll-margin-top: 156px; }

.certifications { padding: 118px 0; background: #fff; scroll-margin-top: 156px; }
.certification-heading { margin-bottom: 48px; }
.certification-grid { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); border-top: 1px solid var(--line); border-left: 1px solid var(--line); }
.certificate-card { min-width: 0; display: flex; flex-direction: column; background: var(--paper-soft); border-right: 1px solid var(--line); border-bottom: 1px solid var(--line); transition: transform .18s ease, box-shadow .18s ease; }
.certificate-card:hover { position: relative; z-index: 1; transform: translateY(-4px); box-shadow: 0 24px 52px rgba(17,19,21,.11); }
.certificate-card figure { height: 390px; display: flex; align-items: center; justify-content: center; margin: 0; padding: 26px; overflow: hidden; background: #eceae5; }
.certificate-card img { width: 100%; height: 100%; object-fit: contain; }
.certificate-card > div { min-height: 170px; padding: 28px 30px 32px; background: #fff; }
.certificate-card span { color: var(--red); font-family: Arial, sans-serif; font-size: 11px; font-weight: 900; letter-spacing: .14em; }
.certificate-card h3 { margin: 0 0 9px; font-size: 22px; line-height: 1.35; }
.certificate-card p { margin: 0; color: var(--muted); font-size: 15px; line-height: 1.7; }

.testing-section { padding: 118px 0; background: var(--dark); color: #fff; scroll-margin-top: 156px; }
.testing-inner { display: grid; grid-template-columns: .8fr 1.2fr; gap: 100px; align-items: start; }
.testing-heading h2 { margin: 0; font-size: clamp(44px, 4.4vw, 72px); line-height: 1.1; letter-spacing: -.045em; }
.testing-heading > p:last-child { max-width: 520px; margin: 30px 0 0; color: #afb1b2; font-size: 17px; line-height: 1.9; }
.testing-grid { display: grid; grid-template-columns: 1fr 1fr; border-top: 1px solid rgba(255,255,255,.2); border-left: 1px solid rgba(255,255,255,.2); }
.testing-grid article { min-height: 340px; display: flex; flex-direction: column; padding: 42px; border-right: 1px solid rgba(255,255,255,.2); border-bottom: 1px solid rgba(255,255,255,.2); }
.testing-grid span { color: var(--yellow); font-family: Arial, sans-serif; font-size: 11px; font-weight: 900; letter-spacing: .14em; }
.testing-grid h3 { margin: auto 0 20px; font-size: 28px; }
.testing-grid p { margin: 0; color: #b5b7b8; font-size: 16px; line-height: 1.85; }
.testing-report-card { position: relative; min-height: 660px !important; overflow: hidden; padding: 0 !important; background: radial-gradient(circle at 24% 12%, rgba(255,255,255,.12), transparent 31%), linear-gradient(145deg, #2c2e32 0%, #121416 44%, #090a0c 100%); }
.testing-report-card::before { content: ""; position: absolute; inset: -15% 35% 18% -20%; transform: skewX(-18deg); background: linear-gradient(110deg, transparent 12%, rgba(255,255,255,.13) 48%, transparent 75%); pointer-events: none; }
.testing-report-copy { position: relative; z-index: 2; padding: 42px 42px 10px; }
.testing-report-copy h3 { margin: 0 0 6px; font-size: 34px; }
.testing-report-copy strong { display: block; color: #f1f2f2; font-size: 22px; line-height: 1.45; }
.testing-report-copy strong::after { content: ""; display: block; width: 58px; height: 5px; margin-top: 18px; border-radius: 3px; background: var(--red); }
.testing-report-copy p { max-width: 520px; margin-top: 18px; font-size: 15px; line-height: 1.75; }
.testing-report-stage { position: relative; z-index: 2; display: flex; flex: 1; flex-direction: column; align-items: center; justify-content: flex-end; min-height: 410px; padding: 24px 28px 30px; color: inherit; }
.testing-report-stage::before { content: ""; position: absolute; right: 10%; bottom: 18px; left: 10%; height: 54px; border: 1px solid rgba(255,255,255,.08); border-top-color: rgba(255,255,255,.18); background: linear-gradient(180deg, #272a2d 0%, #111315 100%); box-shadow: 0 22px 42px rgba(0,0,0,.58); }
.testing-report-frame { position: relative; z-index: 1; width: min(68%, 280px); aspect-ratio: 768 / 1058; margin: 0 0 28px; padding: 10px; background: linear-gradient(135deg, #31353a, #0a0c0e 48%, #3b3e42); border: 2px solid #4d5156; box-shadow: 0 18px 38px rgba(0,0,0,.65), 0 0 0 2px #050607, inset 0 0 0 1px rgba(255,255,255,.14); transition: transform .22s ease, box-shadow .22s ease; }
.testing-report-frame::before { content: ""; position: absolute; inset: 9px; z-index: 1; pointer-events: none; box-shadow: inset 0 0 18px rgba(0,0,0,.22); }
.testing-report-frame img { display: block; width: 100%; height: 100%; object-fit: contain; background: #fff; }
.testing-report-stage:hover .testing-report-frame { transform: translateY(-5px); box-shadow: 0 24px 48px rgba(0,0,0,.72), 0 0 0 2px #050607, inset 0 0 0 1px rgba(255,255,255,.14); }
.testing-report-hint { position: relative; z-index: 2; color: #d5d6d7 !important; font-size: 12px !important; letter-spacing: .08em !important; }

.page-cta { padding: 70px 0; border-top: 1px solid var(--border-light); background: linear-gradient(90deg, #f3f0eb 0%, var(--surface-warm-light) 55%, #f5f2ed 100%); color: var(--text-primary); }
.page-cta-inner { display: flex; align-items: center; justify-content: space-between; gap: 64px; }
.page-cta .eyebrow { margin-bottom: 16px; color: #d71920; }
.page-cta h2 { margin: 0; font-size: clamp(34px, 3.3vw, 52px); line-height: 1.18; }
.page-cta p:not(.eyebrow) { margin: 18px 0 0; color: var(--text-secondary); font-size: 17px; }
.page-cta .button-light { border-color: var(--brand-red); background: var(--brand-red); color: #fff; box-shadow: 0 8px 20px rgba(196,16,23,.16); transition: background .2s ease, border-color .2s ease, transform .2s ease, box-shadow .2s ease; }
.page-cta .button-light:hover { border-color: var(--brand-red-hover); background: var(--brand-red-hover); color: #fff; transform: translateY(-1px); }

.contact-page-section { border-top: 0; }
.contact-guidance { position: relative; overflow: hidden; padding: 92px 0 64px; background: radial-gradient(circle at 10% 12%, rgba(223,23,19,.045), transparent 30%), linear-gradient(135deg, #fff 0%, #fafafa 58%, #f4f4f3 100%); color: var(--ink); }
.contact-guidance::before { position: absolute; top: 34px; left: max(32px, calc((100% - var(--container)) / 2 - 8px)); color: rgba(17,19,21,.025); font-family: Arial, sans-serif; font-size: clamp(76px, 8vw, 132px); font-weight: 900; letter-spacing: -.06em; content: "INFORMATION"; }
.contact-guidance-inner { position: relative; z-index: 1; display: grid; grid-template-columns: minmax(320px, .72fr) minmax(0, 1.72fr); gap: 38px; align-items: start; }
.contact-guidance-heading { padding: 34px 8px 0 0; }
.contact-guidance-heading .eyebrow { margin-bottom: 38px; }
.contact-guidance h2 { margin: 0; font-size: clamp(48px, 4vw, 64px); line-height: 1.15; letter-spacing: -.045em; }
.contact-guidance h2 span { display: inline-block; margin-top: 8px; color: var(--red); }
.contact-guidance-heading > p { margin: 30px 0 0; color: #4f5256; font-size: 18px; line-height: 1.85; }
.contact-guidance-heading > .eyebrow-red { color: var(--red); }
.guidance-values { display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); max-width: 560px; margin-top: 42px; }
.guidance-value { position: relative; min-width: 0; display: flex; flex-direction: column; align-items: center; gap: 11px; padding: 0 15px; color: #282b2e; }
.guidance-value + .guidance-value { border-left: 1px solid #dedbd6; }
.guidance-value svg { width: 46px; height: 46px; flex: 0 0 auto; stroke: currentColor; }
.guidance-value:nth-child(1) svg path:last-child,
.guidance-value:nth-child(2) svg circle:last-child,
.guidance-value:nth-child(3) svg path:last-child,
.guidance-value:nth-child(4) svg path:nth-of-type(5) { stroke: var(--red); stroke-width: 2.5; }
.guidance-value span { color: #4a4d50; font-size: 15px; font-weight: 700; line-height: 1.3; white-space: nowrap; }
.contact-guidance-cards { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 14px; }
.contact-guidance-card { position: relative; min-height: 500px; display: flex; flex-direction: column; overflow: hidden; padding: 30px 26px 26px; border: 1px solid #e7e5e1; border-radius: 12px; background: rgba(255,255,255,.92); box-shadow: 0 18px 46px rgba(21,25,28,.09); transition: transform .24s ease, box-shadow .24s ease; }
.contact-guidance-card:hover { transform: translateY(-4px); box-shadow: 0 24px 58px rgba(21,25,28,.13); }
.guidance-card-number { position: relative; z-index: 2; width: 58px; height: 58px; display: grid; place-items: center; margin-bottom: 46px; border-radius: 50%; background: linear-gradient(145deg, #e91b17, #c90e0a); color: #fff; box-shadow: 0 10px 22px rgba(223,23,19,.2); font-family: Arial, sans-serif; font-size: 24px; font-weight: 900; }
.guidance-card-mark { position: absolute; top: 34px; right: 20px; color: #eeeeec; font-family: Arial, sans-serif; font-size: 28px; font-weight: 900; letter-spacing: -.04em; writing-mode: vertical-rl; }
.contact-guidance-card h3 { position: relative; margin: 0; padding-bottom: 16px; font-size: 23px; line-height: 1.35; }
.contact-guidance-card h3::after { position: absolute; bottom: 0; left: 0; width: 34px; height: 3px; background: var(--red); content: ""; }
.guidance-card-lead { margin: 17px 0 0; color: #777873; font-size: 14px; line-height: 1.7; }
.contact-guidance-card ul { margin: 20px 0 22px; padding-left: 1.25em; }
.contact-guidance-card li { margin: 0 0 11px; padding-left: 4px; color: #27292b; font-size: 14px; font-weight: 700; line-height: 1.55; }
.contact-guidance-card li::marker { color: var(--red); }
.guidance-card-note { margin: auto 0 0; padding: 17px 18px; border-radius: 8px; background: #f4f3f1; color: #55575a; font-size: 12px; line-height: 1.65; }
.guidance-card-note strong { display: block; margin-bottom: 4px; color: var(--ink); font-size: 13px; }
.guidance-support { grid-column: 1 / -1; min-height: 98px; display: grid; grid-template-columns: minmax(0, 1.4fr) auto minmax(360px, 1fr); align-items: center; gap: 32px; margin-top: 38px; padding: 18px 24px; border: 1px solid #e7e5e1; border-radius: 12px; background: rgba(255,255,255,.86); box-shadow: 0 12px 36px rgba(21,25,28,.06); }
.guidance-support-copy { display: grid; grid-template-columns: auto 1fr; align-items: center; gap: 24px; }
.guidance-support-copy strong { white-space: nowrap; font-size: 23px; }
.guidance-support-copy p { margin: 0; color: #626462; font-size: 13px; line-height: 1.65; }
.guidance-support-button { min-height: 58px; display: inline-flex; align-items: center; justify-content: center; gap: 28px; padding: 0 34px; border-radius: 8px; background: var(--red); color: #fff; box-shadow: 0 10px 22px rgba(223,23,19,.18); font-size: 17px; font-weight: 900; transition: background .18s ease, transform .18s ease; }
.guidance-support-button:hover { background: var(--red-deep); transform: translateY(-2px); }
.guidance-support-button span { font-size: 24px; line-height: 1; }
.guidance-support-points { display: grid; grid-template-columns: repeat(3, 1fr); }
.guidance-support-points div { padding: 2px 16px; border-left: 1px solid #e0ded9; }
.guidance-support-points strong, .guidance-support-points span { display: block; }
.guidance-support-points strong { margin-bottom: 5px; font-size: 13px; }
.guidance-support-points span { color: #777873; font-size: 11px; }

.about { padding: 118px 0; background: var(--paper); }
.about-heading { display: grid; grid-template-columns: .5fr 1.5fr; gap: 90px; align-items: start; padding-bottom: 58px; border-bottom: 1px solid var(--line); }
.about-heading h2 { max-width: 800px; }
.about-layout { display: grid; grid-template-columns: .92fr 1.08fr; gap: 70px; align-items: stretch; padding-top: 58px; }
.about-copy > p { margin: 0 0 26px; color: #575858; font-family: "Microsoft YaHei", "PingFang SC", sans-serif; font-size: 18px; line-height: 1.95; }
.about-copy > p:first-child { color: #252626; font-size: 19px; font-weight: 650; }
.about-principle { position: relative; margin: 36px 0 30px; padding: 28px 32px 30px; overflow: hidden; border-top: 4px solid var(--red); background: linear-gradient(135deg, rgba(232,24,20,.1), rgba(232,24,20,.025) 62%), linear-gradient(rgba(25,26,27,.035) 1px, transparent 1px), linear-gradient(90deg, rgba(25,26,27,.035) 1px, transparent 1px); background-size: auto, 24px 24px, 24px 24px; box-shadow: inset 0 0 0 1px rgba(232,24,20,.14); }
.about-copy .about-principle:last-child { margin-bottom: 0; }
.about-principle::after { position: absolute; right: 18px; bottom: -36px; color: rgba(232,24,20,.09); font-family: Georgia, serif; font-size: 150px; line-height: 1; content: "”"; }
.about-principle > span { position: relative; z-index: 1; display: block; margin-bottom: 18px; color: var(--red); font-family: Arial, sans-serif; font-size: 11px; font-weight: 900; letter-spacing: .14em; }
.about-principle > p { position: relative; z-index: 1; margin: 0; color: #151617; font-family: "Microsoft YaHei", "PingFang SC", sans-serif; font-size: clamp(22px, 1.7vw, 29px); font-weight: 900; line-height: 1.58; letter-spacing: -.02em; }
.about-facts { display: grid; grid-template-columns: 1fr 1fr; border-top: 1px solid var(--line); border-left: 1px solid var(--line); }
.about-facts article { min-height: 150px; padding: 30px; border-right: 1px solid var(--line); border-bottom: 1px solid var(--line); }
.about-facts span, .about-facts strong { display: block; }
.about-facts span { margin-bottom: 20px; color: var(--red); font-size: 15px; font-weight: 800; }
.about-facts strong { font-size: 20px; line-height: 1.55; }
.factory-visual { position: relative; min-height: 0; margin: 0; overflow: hidden; background: #ddd; }
.factory-visual img { position: absolute; inset: 0; width: 100%; height: 100%; object-fit: cover; object-position: center top; }

.contact { padding: 104px 0; background: #f6f5f2; color: var(--ink); border-top: 8px solid var(--red); }
.contact-inner { display: block; }
.contact-heading { display: grid; grid-template-columns: 1fr 1fr; align-items: end; gap: 70px; padding-bottom: 34px; border-bottom: 1px solid #d8dadd; }
.contact-heading .eyebrow { grid-column: 1 / -1; margin-bottom: -42px; }
.contact-heading h2 { margin: 0; font-size: clamp(46px, 4vw, 68px); line-height: 1.08; }
.contact-heading > p:last-child { max-width: 560px; margin: 0; color: #545b61; font-size: 18px; line-height: 1.85; }
.contact-layout { display: grid; grid-template-columns: 1.15fr .85fr; gap: 48px; margin-top: 48px; }
.contact-details { display: grid; grid-template-columns: 1fr 1fr; border-top: 1px solid #d3d6d9; border-left: 1px solid #d3d6d9; background: #fff; }
.contact-details > * { min-width: 0; min-height: 132px; display: grid; grid-template-columns: 56px minmax(0, 1fr); align-items: center; gap: 28px; padding: 28px 34px; border-right: 1px solid #d3d6d9; border-bottom: 1px solid #d3d6d9; }
.contact-details a { transition: background .18s ease, color .18s ease; }
.contact-details a:hover { background: #fff5f4; }
.contact-detail-icon { width: 56px; height: 56px; display: grid; place-items: center; border: 1.5px solid #f04444; border-radius: 50%; color: #ee2b2b; }
.contact-detail-icon svg { width: 28px; height: 28px; stroke: currentColor; }
.contact-detail-copy { min-width: 0; display: flex; flex-direction: column; gap: 7px; }
.contact-detail-copy > span { color: var(--red); font-size: 14px; font-weight: 800; letter-spacing: .04em; }
.contact-details strong { color: #2b2f33; font-size: 18px; line-height: 1.55; }
.company-qr { min-height: 254px; display: flex; align-items: center; justify-content: center; padding: 18px; border: 1px solid #d3d6d9; background: #fff; text-align: center; }
.company-qr-image { width: auto; height: 235px; max-width: 100%; object-fit: contain; }
.company-qr-copy span, .company-qr-copy strong { display: block; }
.company-qr-copy span { color: var(--red); font-size: 12px; font-weight: 800; letter-spacing: .12em; }
.company-qr-copy strong { margin-top: 18px; font-size: 24px; }
.company-qr-copy p { margin: 16px 0 0; color: #62686d; font-size: 14px; line-height: 1.7; }

.site-footer { padding: 62px 0 24px; background: #fff; color: var(--ink); border-top: 4px solid var(--red); }
.footer-grid { display: grid; grid-template-columns: 1.4fr .7fr .7fr 1fr; gap: 60px; padding-bottom: 48px; }
.footer-grid > div:not(.footer-brand) { display: flex; flex-direction: column; align-items: flex-start; gap: 12px; }
.footer-grid strong { margin-bottom: 7px; font-size: 20px; }
.footer-grid a, .footer-grid p { margin: 0; color: #4f565c; font-size: 17px; line-height: 1.75; }
.footer-grid a:hover { color: var(--red); }
.footer-brand img { display: block; width: 184px; height: auto; margin-bottom: 24px; object-fit: contain; }
.footer-brand > strong { display: block; margin-bottom: 9px; font-size: 22px; }
.footer-contact span { display: block; margin-bottom: 2px; color: #7b8187; font-size: 14px; font-weight: 700; letter-spacing: .04em; }
.footer-bottom { display: flex; justify-content: space-between; gap: 24px; padding-top: 20px; border-top: 1px solid #e3e5e7; }
.footer-bottom p { margin: 0; color: #666d73; font-size: 14px; }

.quick-contact-stack { position: fixed; right: 28px; bottom: 22px; z-index: 80; display: flex; flex-direction: column; align-items: stretch; gap: 10px; }
.quick-contact-qr { align-self: flex-end; width: 112px; padding: 7px 8px 6px; border: 1px solid #e1e3e5; background: #fff; box-shadow: 0 12px 32px rgba(0,0,0,.16); text-align: center; }
.quick-contact-qr img { display: block; width: 94px; height: auto; margin: 0 auto; }
.quick-contact-qr span { display: block; margin-top: 5px; color: #555b60; font-size: 11px; font-weight: 700; letter-spacing: .06em; }
.quick-contact { min-height: 50px; display: flex; align-items: center; gap: 14px; padding: 0 20px; background: var(--yellow); color: var(--ink); box-shadow: 0 12px 32px rgba(0,0,0,.2); }
.quick-contact span { font-size: 11px; }
.quick-contact strong { font-size: 14px; }

@media (max-width: 1180px) {
  .header-inner { gap: 24px; }
  .brand-copy small { display: none; }
  .site-nav a { min-width: 84px; padding-inline: 10px; }
  .site-nav a::after { right: 10px; left: 10px; }
  .hero-copy { margin-left: 25%; width: 66%; }
  .section-heading { gap: 50px; }
  .statement-inner { padding-left: 10%; }
  .application-gallery { grid-template-columns: 1fr 1fr; }
  .application-card { min-height: 500px; }
  .testing-inner { gap: 54px; }
  .contact-guidance-inner { grid-template-columns: 1fr; gap: 30px; }
  .contact-guidance-heading { max-width: 720px; padding-top: 8px; }
  .guidance-values { max-width: 560px; }
  .certificate-card figure { height: 330px; }
}

@media (max-width: 900px) {
  html { scroll-padding-top: 72px; }
  section { scroll-margin-top: 72px; }
  .container { width: min(calc(100% - 40px), var(--container)); }
  .header-inner { width: calc(100% - 40px); min-height: 72px; }
  .brand > img { width: 142px; height: 40px; }
  .brand-copy { display: none; }
  .menu-toggle { display: block; }
  .site-nav { position: fixed; inset: 72px 0 0; display: flex; flex-direction: column; align-items: stretch; gap: 0; padding: 22px 24px; background: #fff; transform: translateX(100%); transition: transform .22s ease; }
  .site-nav.is-open { transform: translateX(0); }
  .site-nav a { min-height: 64px; display: flex; align-items: center; justify-content: flex-start; padding: 0; border-bottom: 1px solid #e4e4e2; font-size: 19px; }
  .site-nav a::after { right: auto; left: 0; width: 36px; }
  .page-subnav { top: 72px; overflow-x: auto; }
  .page-subnav-inner { width: max-content; min-width: 100%; }
  .page-subnav a { min-width: 150px; min-height: 64px; }

  .catalog-item, .catalog-item:nth-child(even) { grid-template-columns: 1fr 1fr; }
  .catalog-item:nth-child(even) .catalog-item-copy { order: 0; }
  .catalog-item-copy { padding: 42px 36px; }
  .catalog-item-copy::before { left: 36px; }

  .hero, .hero-inner { min-height: 690px; }
  .hero-image { width: 64%; opacity: .34; }
  .hero-copy { width: 88%; margin-left: 5%; padding: 88px 0 72px; }
  .hero h1 { font-size: clamp(52px, 8vw, 72px); }
  .hero-intro { max-width: 620px; }
  .category-inner { width: max-content; min-width: 100%; grid-template-columns: repeat(6, minmax(170px, auto)); }
  .category-rail { overflow-x: auto; }
  .category-inner > * { min-height: 78px; font-size: 17px; }
  .category-label { gap: 4px; padding-left: 34px; font-size: 20px; }
  .category-label::before { font-size: 8px; letter-spacing: .16em; }
  .category-label::after { width: 36px; }

  .section-heading, .applications-inner { grid-template-columns: 1fr; }
  .section-heading { gap: 28px; }
  .product-grid { grid-template-columns: 1fr 1fr; }
  .product-card-featured { grid-column: span 2; }
  .statement-inner { padding-left: 6%; }
  .applications-inner { gap: 36px; }
  .applications-note { max-width: 720px; }
  .application-gallery { grid-template-columns: 1fr 1fr; margin-top: 12px; }
  .application-card { min-height: 500px; }
  .home-cta-inner, .page-cta-inner { align-items: flex-start; flex-direction: column; }
  .home-cta-actions { justify-content: flex-start; }
  .about-heading { grid-template-columns: 1fr; gap: 24px; }
  .about-layout { grid-template-columns: 1fr; }
  .factory-visual { min-height: 0; aspect-ratio: 4 / 5; }
  .certification-grid { grid-template-columns: 1fr 1fr; }
  .testing-inner, .contact-guidance-inner { grid-template-columns: 1fr; }
  .contact-guidance-heading { max-width: 720px; padding-top: 8px; }
  .guidance-values { max-width: 560px; }
  .guidance-support { grid-template-columns: 1fr auto; }
  .guidance-support-points { grid-column: 1 / -1; }
  .testing-grid { max-width: 760px; }
  .contact-heading { gap: 36px; }
  .contact-layout { grid-template-columns: 1fr; }
  .footer-grid { grid-template-columns: 1.2fr 1fr 1fr; }
  .footer-contact { grid-column: 2 / -1; }
}

@media (max-width: 620px) {
  .container { width: min(calc(100% - 32px), var(--container)); }
  .header-inner { width: calc(100% - 32px); }
  .brand > img { width: 136px; }
  .hero, .hero-inner { min-height: 720px; }
  .hero-image { inset: 0; width: 100%; opacity: .22; }
  .hero-copy { width: 100%; margin: 0; padding: 92px 0 58px; }
  .eyebrow { margin-bottom: 20px; font-size: 10px; }
  .hero h1 { font-size: clamp(40px, 11.5vw, 50px); line-height: 1.12; letter-spacing: -.02em; }
  .hero h1 em { margin-top: 16px; color: #e2e3e4; font-size: .86em; font-weight: 700; line-height: 1.28; letter-spacing: 0; -webkit-text-stroke: 0 transparent; }
  .hero h1 em > span { display: block; }
  .hero-intro { margin-top: 28px; font-size: 14px; line-height: 1.85; }
  .hero-actions, .statement-actions { display: grid; grid-template-columns: 1fr; }
  .button { width: 100%; }
  .page-hero { min-height: 390px; }
  .page-hero h1 { font-size: 58px; }
  .page-hero-inner > p:last-child { font-size: 16px; }

  .category-rail { overflow: hidden; }
  .category-inner { width: 100%; min-width: 0; min-height: 78px; grid-template-columns: 1fr; }
  .category-inner > * { min-height: 78px; }
  .category-inner > a:not(.category-label) { display: none; }
  .category-label { width: 100%; flex-direction: row; align-items: center; justify-content: space-between; gap: 18px; padding: 0 24px; border: 0; }
  .category-label::before, .category-label::after { display: none; }
  .category-label > span { display: block; color: rgba(21,21,21,.72); font-size: 12px; font-weight: 800; letter-spacing: .02em; }

  .catalog-hero { min-height: 360px; }
  .catalog-hero-inner { padding-block: 66px; }
  .catalog-hero h1 { font-size: 52px; line-height: 1; }
  .catalog-hero-inner > p:last-child { margin-top: 24px; font-size: 15px; line-height: 1.8; }
  .catalog-subnav { overflow: hidden; }
  .catalog-subnav .page-subnav-inner { width: 100%; min-width: 0; display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); }
  .catalog-subnav .page-subnav-inner a { min-width: 0; min-height: 50px; padding: 0 6px; border-bottom: 1px solid #e2e2df; font-size: 13px; }
  .catalog { padding: 78px 0 88px; }
  .catalog-heading { margin-bottom: 38px; }
  .catalog-heading h2 { font-size: 39px; }
  .catalog-item, .catalog-item:nth-child(even) { min-height: 0; grid-template-columns: 1fr; }
  .catalog-item-copy, .catalog-item:nth-child(even) .catalog-item-copy { order: 2; padding: 34px 26px 36px; }
  .catalog-item-copy::before { left: 26px; width: 64px; }
  .catalog-item h2 { margin: 24px 0 16px; font-size: 34px; }
  .catalog-item-copy > p { font-size: 14px; line-height: 1.82; }
  .catalog-item ul { margin-top: 22px; }
  .catalog-item a { padding-top: 28px; }
  .catalog-item figure { min-height: 0; aspect-ratio: 4 / 3; }

  .product-section, .about { padding: 84px 0; }
  .section-heading h2, .about-heading h2, .contact h2 { font-size: 40px; }
  .product-grid { grid-template-columns: 1fr; }
  .product-card-featured { grid-column: span 1; }
  .product-card-featured { background-position: right center; background-size: auto 100%; }
  .product-card-featured .product-code, .product-card-tubing .product-code, .product-card-joint .product-code, .product-card-branch .product-code, .product-card-equipment .product-code { gap: 10px; }
  .product-card-featured .product-code small, .product-card-tubing .product-code small, .product-card-joint .product-code small, .product-card-branch .product-code small, .product-card-equipment .product-code small { padding: 6px 9px; font-size: 10px; letter-spacing: .02em; }
  .tubing-visual { height: 170px; margin: 20px -8px 0; }
  .product-card-joint .joint-visual { height: 178px; margin: 20px -8px 0; }
  .product-card-branch .branch-visual { height: 178px; margin: 20px -8px 0; }
  .product-card-equipment .equipment-visual { height: 178px; margin: 20px -8px 0; }
  .product-card-tubing h3, .product-card-tubing p { max-width: 100%; }
  .product-card-featured::before { background: linear-gradient(90deg, rgba(11,14,17,.98) 0%, rgba(11,14,17,.9) 72%, rgba(11,14,17,.34) 100%); }
  .product-card-featured h3, .product-card-featured p { max-width: 78%; }
  .product-card { min-height: 340px; padding: 30px 26px; }
  .product-card h3 { font-size: 30px; }

  .statement { min-height: 0; display: block; }
  .statement::after { display: none; }
  .statement-visual { position: relative; inset: auto; display: block; width: 100%; height: auto; object-fit: contain; object-position: center; opacity: 1; }
  .statement-inner { padding: 42px 0 50px; }
  .statement h2 { font-size: clamp(38px, 10.5vw, 44px); line-height: 1.12; letter-spacing: -.02em; }
  .statement h2 em { margin-top: 16px; color: #e2e3e4; font-size: .86em; font-weight: 700; line-height: 1.28; letter-spacing: 0; -webkit-text-stroke: 0 transparent; }
  .statement h2 em > span { display: block; }
  .statement-inner > p:not(.eyebrow) { margin-top: 24px; font-size: 14px; line-height: 1.8; }
  .statement-actions { grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 10px; margin-top: 28px; }
  .statement-actions .button { min-height: 52px; padding: 0 10px; font-size: 13px; }
  .applications { padding: 88px 0; }
  .applications-copy h2 { font-size: 40px; }
  .applications-copy > p:last-child, .applications-note { font-size: 15px; }
  .application-gallery { grid-template-columns: 1fr; }
  .application-card { min-height: 460px; }
  .application-card-content { padding: 30px 26px; }
  .application-card h3 { font-size: 30px; }
  .home-cta { padding: 52px 0; }
  .home-cta h2 { font-size: 34px; }
  .home-cta-actions { width: 100%; }
  .about-layout { padding-top: 42px; }
  .about-copy > p { font-size: 17px; line-height: 1.9; }
  .about-copy > p:first-child { font-size: 18px; }
  .about-principle { margin: 30px 0 26px; padding: 24px 22px 26px; }
  .about-principle > p { font-size: 22px; line-height: 1.58; }
  .about-facts { grid-template-columns: 1fr; }
  .about-facts article { min-height: 138px; padding: 26px; }
  .about-facts span { font-size: 14px; }
  .about-facts strong { font-size: 18px; }
  .factory-visual { min-height: 420px; aspect-ratio: auto; background: #d8d8d6 url("assets/images/zglt-factory-yard-mobile-20260905.jpg") center top / cover no-repeat; }
  .factory-visual img { position: relative; inset: auto; width: 100%; height: auto; min-height: 420px; object-fit: cover; object-position: center top; }
  .certifications, .testing-section { padding: 84px 0; }
  .contact-guidance { padding: 76px 0 48px; }
  .certification-grid { grid-template-columns: 1fr; }
  .certificate-card figure { height: 390px; }
  .certificate-card > div { min-height: 150px; }
  .testing-grid { grid-template-columns: 1fr; }
  .testing-grid article { min-height: 270px; padding: 32px 26px; }
  .testing-report-card { min-height: 620px !important; }
  .testing-report-copy { padding: 32px 26px 6px; }
  .testing-report-copy h3 { margin-top: 22px; font-size: 30px; }
  .testing-report-copy strong { font-size: 20px; }
  .testing-report-stage { min-height: 390px; padding-inline: 20px; }
  .testing-report-frame { width: min(58%, 250px); }
  .testing-heading h2, .contact-guidance h2 { font-size: 40px; }
  .testing-heading > p:last-child { font-size: 16px; }
  .page-cta { padding: 58px 0; }
  .page-cta-inner { gap: 32px; }
  .page-cta h2 { font-size: 34px; }
  .contact-guidance-cards { grid-template-columns: 1fr; }
  .guidance-values { width: min(100%, 480px); margin-top: 34px; }
  .guidance-value { gap: 8px; padding-inline: 5px; }
  .guidance-value svg { width: 38px; height: 38px; }
  .guidance-value span { font-size: 12px; }
  .contact-guidance-card { min-height: 0; padding: 26px 22px 22px; }
  .guidance-card-number { width: 52px; height: 52px; margin-bottom: 32px; font-size: 21px; }
  .guidance-support { grid-template-columns: 1fr; margin-top: 12px; padding: 22px 18px; }
  .guidance-support-copy { grid-template-columns: 1fr; gap: 8px; }
  .guidance-support-button { width: 100%; }
  .guidance-support-points { grid-column: auto; grid-template-columns: 1fr; gap: 14px; }
  .guidance-support-points div { padding: 0 0 0 14px; }
  .contact { padding: 78px 0; }
  .contact-heading { grid-template-columns: 1fr; align-items: start; gap: 18px; }
  .contact-heading .eyebrow { grid-column: auto; margin-bottom: 0; }
  .contact-heading > p:last-child { font-size: 16px; }
  .contact-layout { margin-top: 32px; gap: 24px; }
  .contact-details { grid-template-columns: 1fr; }
  .contact-details > * { min-height: 112px; grid-template-columns: 48px minmax(0, 1fr); gap: 18px; padding: 22px 20px; }
  .contact-detail-icon { width: 48px; height: 48px; }
  .contact-detail-icon svg { width: 24px; height: 24px; }
  .contact-details strong { font-size: 16px; }
  .company-qr { min-height: 210px; padding: 24px; }
  .company-qr-image { width: min(100%, 280px); height: auto; }
  .footer-grid { grid-template-columns: 1fr 1fr; gap: 38px 24px; }
  .footer-brand, .footer-contact { grid-column: 1 / -1; }
  .footer-grid strong { font-size: 18px; }
  .footer-grid a, .footer-grid p { font-size: 16px; }
  .footer-brand > strong { font-size: 20px; }
  .footer-contact span { font-size: 13px; }
  .footer-bottom p { font-size: 13px; }
  .footer-bottom { flex-direction: column; }
  .quick-contact-stack { right: 14px; bottom: max(14px, env(safe-area-inset-bottom)); }
  .quick-contact-qr { display: none; }
  .quick-contact { width: 52px; min-height: 52px; justify-content: center; gap: 0; padding: 0; border-radius: 50%; }
  .quick-contact span { font-size: 13px; font-weight: 900; }
  .quick-contact strong { display: none; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { transition-duration: .01ms !important; animation-duration: .01ms !important; animation-iteration-count: 1 !important; }
}