/*
Theme Name: Huijie
Theme URI: http://localhost:8080
Author: Huijie Electronics
Description: Industrial B2B product catalog theme for Huijie Electronics.
Version: 2.3.0
Text Domain: huijie
*/

:root {
    --color-bg: #F6F7F9;
    --color-surface: #FFFFFF;
    --color-accent: #D9480F;
    --color-text: #14181D;
    --color-text-2: #3A3F47;
    --color-muted: #6B7280;
    --color-border: #E5E7EB;
    --color-whatsapp: #25D366;
    --color-error: #B42318;
    --color-error-bg: #FEF3F2;
    --shadow-card: 0 1px 2px rgba(16, 24, 40, .06);
    --font-heading: 'Archivo', Arial, sans-serif;
    --font-body: 'Inter', Arial, sans-serif;
    --font-model: 'SFMono-Regular', Consolas, 'Liberation Mono', monospace;
    --radius-card: 8px;
    --radius-button: 4px;
    --space-1: 8px;
    --space-2: 16px;
    --space-3: 24px;
    --space-4: 32px;
    --space-5: 40px;
    --space-6: 48px;
    --space-8: 64px;
    --space-10: 80px;
    --max-width: 1280px;
}

*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body { margin: 0; color: var(--color-text); background: var(--color-bg); font-family: var(--font-body); font-size: 16px; line-height: 1.6; letter-spacing: 0; }
body.drawer-open { overflow: hidden; }
img { display: block; max-width: 100%; }
a { color: inherit; text-decoration: none; }
button, input, select, textarea { color: inherit; font: inherit; letter-spacing: 0; }
button, select { cursor: pointer; }
h1, h2, h3, h4, p, figure, dl, dd { margin-top: 0; }
h1, h2, h3, h4 { color: var(--color-text); font-family: var(--font-heading); line-height: 1.08; letter-spacing: 0; }
h1 { font-size: 64px; font-weight: 700; }
h2 { font-size: 42px; font-weight: 600; }
h3 { font-size: 20px; font-weight: 600; }
p { color: var(--color-text-2); }
.container { width: min(calc(100% - 48px), var(--max-width)); margin-inline: auto; }
.screen-reader-text { position: absolute; width: 1px; height: 1px; padding: 0; overflow: hidden; clip: rect(0, 0, 0, 0); white-space: nowrap; border: 0; }
.skip-link { position: fixed; top: -100px; left: var(--space-2); z-index: 1000; padding: 12px 18px; color: var(--color-surface); background: var(--color-text); }
.skip-link:focus { top: var(--space-2); }
.eyebrow { margin-bottom: 12px; color: var(--color-accent); font-family: var(--font-heading); font-size: 12px; font-weight: 700; text-transform: uppercase; }

.site-header { position: sticky; top: 0; z-index: 100; background: rgba(255, 255, 255, .96); border-bottom: 1px solid var(--color-border); backdrop-filter: blur(14px); }
.site-header__bar { min-height: 80px; display: grid; grid-template-columns: 220px minmax(0, 1fr) auto; align-items: center; gap: var(--space-3); }
.brand { display: inline-flex; align-items: center; gap: 12px; width: fit-content; }
.brand__mark { width: 42px; height: 42px; display: grid; place-items: center; color: var(--color-surface); background: var(--color-accent); border-radius: var(--radius-button); font-family: var(--font-heading); font-size: 14px; font-weight: 700; }
.brand__copy { display: grid; line-height: 1; }
.brand__copy strong { font-family: var(--font-heading); font-size: 15px; }
.brand__copy small { margin-top: 5px; color: var(--color-muted); font-size: 10px; text-transform: uppercase; }
.site-nav__list { display: flex; align-items: center; justify-content: center; gap: 4px; margin: 0; padding: 0; list-style: none; }
.site-nav__list a { display: block; padding: 11px 13px; color: var(--color-text-2); font-size: 14px; font-weight: 500; border-bottom: 2px solid transparent; }
.site-nav__list a:hover, .site-nav__list a:focus-visible, .site-nav__list .current-menu-item > a { color: var(--color-text); border-bottom-color: var(--color-accent); }
.nav-toggle { display: none; width: 44px; height: 44px; padding: 9px; border: 1px solid var(--color-border); border-radius: var(--radius-button); background: var(--color-surface); }
.nav-toggle > span:not(.screen-reader-text) { display: block; height: 2px; margin: 5px 0; background: var(--color-text); }
.header-inquiry { min-height: 40px; display: inline-flex; align-items: center; gap: 10px; padding: 8px 10px 8px 14px; color: var(--color-text); background: var(--color-surface); border: 1px solid var(--color-border); border-radius: var(--radius-button); }
.header-inquiry strong { min-width: 24px; height: 24px; display: grid; place-items: center; color: var(--color-surface); background: var(--color-accent); border-radius: 50%; font-size: 11px; }

.home-hero { position: relative; min-height: 700px; display: flex; align-items: stretch; overflow: hidden; background: var(--color-bg); border-bottom: 1px solid var(--color-border); }
.home-hero__background, .home-hero__overlay { position: absolute; inset: 0; width: 100%; height: 100%; }
.home-hero__background { object-fit: cover; opacity: .12; }
.home-hero__overlay { background: rgba(246, 247, 249, .78); }
.home-hero__content { position: relative; z-index: 1; display: grid; grid-template-columns: minmax(0, 1.1fr) minmax(360px, .9fr); align-items: center; gap: var(--space-8); padding-block: var(--space-10); }
.home-hero__copy { max-width: 720px; }
.home-hero__copy h1 { margin-bottom: var(--space-3); }
.home-hero__lead { max-width: 680px; margin-bottom: var(--space-4); font-size: 20px; }
.button-row { display: flex; flex-wrap: wrap; gap: 12px; }
.button-row--center { justify-content: center; }
.hero-proof { display: flex; gap: 0; margin: var(--space-6) 0 0; border-top: 1px solid var(--color-border); }
.hero-proof div { min-width: 150px; padding: var(--space-2) var(--space-3) 0 0; }
.hero-proof dt { color: var(--color-muted); font-size: 11px; text-transform: uppercase; }
.hero-proof dd { color: var(--color-text); font-family: var(--font-heading); font-size: 22px; font-weight: 600; }
.home-hero__product { position: relative; align-self: end; min-height: 520px; display: grid; place-items: center; }
.home-hero__product img { width: 100%; height: 500px; object-fit: contain; }
.home-hero__product span { position: absolute; right: 0; bottom: 0; padding: 8px 12px; color: var(--color-text); background: var(--color-surface); border: 1px solid var(--color-border); border-radius: var(--radius-button); font-family: var(--font-model); font-size: 12px; box-shadow: var(--shadow-card); }

.section { padding-block: 96px; }
.section-heading { max-width: 760px; margin-bottom: var(--space-6); }
.section-heading h2 { margin-bottom: var(--space-2); }
.section-heading--split { max-width: none; display: flex; align-items: end; justify-content: space-between; gap: var(--space-4); }
.section-heading--split > div { max-width: 760px; }
.section-heading--split > p { max-width: 440px; margin-bottom: 4px; }

.category-band { background: var(--color-bg); }
.category-band h2, .category-band .category-card__meta strong { color: var(--color-text); }
.category-band p, .category-band .btn-tertiary { color: var(--color-text-2); }
.category-grid { display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); gap: var(--space-2); }
.category-card { position: relative; min-height: 330px; display: grid; grid-template-rows: 1fr auto; overflow: hidden; background: var(--color-surface); border: 1px solid var(--color-border); border-radius: var(--radius-card); box-shadow: var(--shadow-card); }
.category-card:first-child { grid-column: span 2; }
.category-card img { width: 100%; height: 250px; object-fit: contain; padding: var(--space-3); transition: transform .2s ease; }
.category-card:hover img { transform: scale(1.04); }
.category-card__index { position: absolute; top: var(--space-2); left: var(--space-2); z-index: 2; color: var(--color-muted); font-family: var(--font-model); font-size: 11px; }
.category-card__meta { display: flex; align-items: end; justify-content: space-between; gap: var(--space-2); padding: var(--space-2); border-top: 1px solid var(--color-border); }
.category-card__meta strong { font-family: var(--font-heading); }
.category-card__meta small { color: var(--color-muted); }

.hot-sale { background: var(--color-bg); }
.product-rail { display: grid; grid-auto-flow: column; grid-auto-columns: minmax(290px, 330px); gap: var(--space-2); overflow-x: auto; padding-bottom: var(--space-3); scroll-snap-type: x mandatory; }
.product-rail > * { scroll-snap-align: start; }

.engineering-story { background: var(--color-surface); }
.engineering-story__grid { display: grid; grid-template-columns: minmax(0, .9fr) minmax(480px, 1.1fr); gap: var(--space-10); align-items: center; }
.engineering-story__copy > p:not(.eyebrow) { max-width: 600px; }
.factory-stats { display: grid; grid-template-columns: repeat(2, 1fr); margin: var(--space-6) 0 0; border-top: 1px solid var(--color-border); border-left: 1px solid var(--color-border); }
.factory-stats div { min-height: 120px; padding: var(--space-3); border-right: 1px solid var(--color-border); border-bottom: 1px solid var(--color-border); }
.factory-stats dt { color: var(--color-muted); font-size: 11px; text-transform: uppercase; }
.factory-stats dd { margin-top: 8px; color: var(--color-text); font-family: var(--font-heading); font-size: 28px; }
.engineering-story__media { margin: 0; }
.engineering-story__media img { width: 100%; aspect-ratio: 4 / 3; object-fit: cover; border-radius: var(--radius-card); }
.engineering-story__media figcaption { padding-top: 10px; color: var(--color-muted); font-size: 12px; }

.oem-strip { padding-block: var(--space-6); background: var(--color-surface); border-block: 1px solid var(--color-border); }
.oem-strip .eyebrow { color: var(--color-accent); }
.oem-strip h2 { color: var(--color-text); }
.oem-strip__content { display: grid; grid-template-columns: 1fr 1fr auto; align-items: center; gap: var(--space-6); }
.oem-strip__content h2 { margin: 0; font-size: 30px; }
.oem-strip__content ul { display: grid; grid-template-columns: 1fr 1fr; gap: 8px 24px; margin: 0; padding: 0; color: var(--color-text-2); list-style: none; }
.oem-strip__content li::before { content: '+'; margin-right: 8px; font-weight: 700; }
.oem-strip .btn-primary { color: var(--color-surface); background: var(--color-accent); border-color: var(--color-accent); }

.proof-wall { background: var(--color-bg); }
.proof-wall__grid { display: grid; grid-template-columns: minmax(320px, .75fr) minmax(0, 1.25fr); gap: var(--space-10); align-items: center; }
.certificate-list { display: flex; flex-wrap: wrap; gap: 8px; margin-top: var(--space-4); }
.certificate-list span { padding: 8px 12px; color: var(--color-text-2); background: var(--color-surface); border: 1px solid var(--color-border); border-radius: var(--radius-button); font-size: 12px; }
.certificate-images { display: grid; grid-template-columns: repeat(3, 1fr); gap: var(--space-2); }
.certificate-images img { width: 100%; aspect-ratio: 3 / 4; object-fit: cover; background: var(--color-surface); border: 1px solid var(--color-border); border-radius: var(--radius-card); box-shadow: var(--shadow-card); }

.b2b-cta { border-top: 1px solid var(--color-border); border-bottom: 1px solid var(--color-border); background: var(--color-surface); }
.b2b-cta__inner { max-width: 840px; margin-inline: auto; text-align: center; }
.b2b-cta__inner > p:not(.eyebrow) { max-width: 680px; margin-inline: auto; }

.archive-hero, .page-hero { padding-block: var(--space-10); background: var(--color-surface); border-bottom: 1px solid var(--color-border); }
.archive-hero--category { padding-bottom: var(--space-8); }
.archive-hero__heading { display: grid; grid-template-columns: 1fr minmax(300px, .65fr); gap: var(--space-8); align-items: end; }
.archive-hero__heading h1 { margin-bottom: 0; }
.archive-hero__heading p { margin-bottom: 6px; }
.archive-hero__count { margin: var(--space-5) 0 0; color: var(--color-muted); }
.archive-hero__count strong { margin-right: 8px; color: var(--color-text); font-family: var(--font-heading); font-size: 24px; }
.archive-body { padding-block: var(--space-5) var(--space-10); }
.term-filter { display: flex; flex-wrap: wrap; gap: 8px; margin-bottom: var(--space-5); }
.term-filter a { display: inline-flex; gap: 8px; align-items: center; padding: 8px 12px; color: var(--color-text-2); background: var(--color-surface); border: 1px solid var(--color-border); border-radius: var(--radius-button); font-size: 12px; }
.term-filter a:hover, .term-filter a.is-active { color: var(--color-surface); background: var(--color-accent); border-color: var(--color-accent); }
.term-filter span { color: var(--color-muted); }
.product-grid { display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); gap: var(--space-3) var(--space-2); }
.navigation.pagination { margin-top: var(--space-6); }
.nav-links { display: flex; justify-content: center; gap: 6px; }
.page-numbers { width: 42px; height: 42px; display: grid; place-items: center; color: var(--color-text-2); background: var(--color-surface); border: 1px solid var(--color-border); }
.page-numbers.current { color: var(--color-surface); background: var(--color-accent); border-color: var(--color-accent); }
.category-seo { padding-block: var(--space-10); background: var(--color-surface); border-top: 1px solid var(--color-border); }
.category-seo__inner { max-width: 820px; }
.category-seo__inner p { max-width: 720px; }
.category-faq { background: var(--color-bg); border-top: 1px solid var(--color-border); }
.category-faq__inner { max-width: 920px; }
.category-faq .section-heading { margin-bottom: var(--space-3); }

.single-product { padding-block: var(--space-4) var(--space-10); }
.single-product__layout { display: grid; grid-template-columns: minmax(0, 1.15fr) minmax(360px, .85fr); gap: var(--space-8); align-items: start; }
.product-gallery__main { aspect-ratio: 1 / 1; display: grid; place-items: center; overflow: hidden; background: var(--color-surface); border: 1px solid var(--color-border); border-radius: var(--radius-card); box-shadow: var(--shadow-card); }
.product-gallery__main img { width: 100%; height: 100%; object-fit: contain; padding: var(--space-4); }
.product-gallery__thumbs { display: grid; grid-template-columns: repeat(6, 1fr); gap: 8px; margin-top: 8px; }
.product-gallery__thumbs button { aspect-ratio: 1; overflow: hidden; padding: 0; background: var(--color-surface); border: 1px solid var(--color-border); border-radius: var(--radius-button); }
.product-gallery__thumbs button[aria-current='true'] { border-color: var(--color-accent); }
.product-gallery__thumbs img { width: 100%; height: 100%; object-fit: cover; }
.single-product__summary { position: sticky; top: 112px; padding-top: var(--space-2); }
.single-product__summary h1 { margin-bottom: var(--space-2); font-family: var(--font-model); font-size: 52px; }
.single-product__lead { margin-bottom: var(--space-3); font-size: 18px; }
.badge-row { display: flex; gap: 8px; margin-bottom: var(--space-3); }
.pdp-actions { display: grid; grid-template-columns: 1fr 1fr; gap: 10px; margin: var(--space-4) 0 var(--space-2); }
.single-product__contact { margin-top: var(--space-2); color: var(--color-muted); font-size: 12px; }
.product-tabs { margin-top: var(--space-10); border-top: 1px solid var(--color-border); }
.product-tabs__list { display: flex; gap: var(--space-4); overflow-x: auto; border-bottom: 1px solid var(--color-border); }
.product-tabs__list button { padding: var(--space-3) 0; color: var(--color-muted); background: transparent; border: 0; border-bottom: 2px solid transparent; font-family: var(--font-heading); font-weight: 600; }
.product-tabs__list button[aria-selected='true'] { color: var(--color-text); border-bottom-color: var(--color-accent); }
.product-tabs__panel { max-width: 900px; padding-block: var(--space-5); }
.product-description { margin-top: var(--space-5); color: var(--color-text-2); }
.faq-list details { padding-block: var(--space-3); border-bottom: 1px solid var(--color-border); }
.faq-list summary { color: var(--color-text); font-family: var(--font-heading); font-weight: 600; }
.faq-list p { margin: var(--space-2) 0 0; }
.related-products { padding-top: var(--space-10); }
.mobile-product-cta { display: none; }

.page-hero--compact { padding-block: var(--space-8); }
.page-hero__content { position: relative; z-index: 2; }
.page-hero h1 { max-width: 860px; }
.page-hero p:not(.eyebrow) { max-width: 720px; }
.inquiry-workspace { padding-top: var(--space-8); }
.inquiry-workspace__grid { display: grid; grid-template-columns: minmax(0, .9fr) minmax(460px, 1.1fr); gap: var(--space-8); align-items: start; }
.inquiry-list-panel > header { display: grid; grid-template-columns: 1fr auto; align-items: end; margin-bottom: var(--space-4); padding-bottom: var(--space-3); border-bottom: 1px solid var(--color-border); }
.inquiry-list-panel > header .eyebrow { grid-column: 1 / -1; }
.inquiry-list-panel > header h2 { margin: 0; }
.inquiry-list-panel > header > span { color: var(--color-muted); }
.inquiry-page-empty { padding: var(--space-8) var(--space-4); text-align: center; background: var(--color-surface); border: 1px solid var(--color-border); border-radius: var(--radius-card); box-shadow: var(--shadow-card); }
.inquiry-page-items { display: grid; gap: 12px; }
.inquiry-form-panel { padding-left: var(--space-8); border-left: 1px solid var(--color-border); }
.whatsapp-alternative { display: flex; justify-content: space-between; gap: var(--space-2); margin-top: var(--space-4); padding-top: var(--space-3); border-top: 1px solid var(--color-border); }
.whatsapp-alternative span { color: var(--color-muted); }
.whatsapp-alternative strong { color: var(--color-whatsapp); }
.inquiry-success { padding: var(--space-5); background: var(--color-surface); border: 1px solid var(--color-border); border-radius: var(--radius-card); box-shadow: var(--shadow-card); }

.oem-hero { position: relative; min-height: 650px; display: flex; align-items: center; overflow: hidden; background: var(--color-bg); }
.oem-hero > img { position: absolute; inset: 0; width: 100%; height: 100%; object-fit: cover; opacity: .12; }
.oem-hero::after { content: ''; position: absolute; inset: 0; background: rgba(246, 247, 249, .78); }
.oem-hero .page-hero__content { padding-block: var(--space-10); }
.oem-hero h1 { max-width: 780px; }
.oem-hero .button-row { margin-top: var(--space-4); }
.process-list { display: grid; grid-template-columns: repeat(5, 1fr); margin: 0; padding: 0; list-style: none; border-top: 1px solid var(--color-border); border-left: 1px solid var(--color-border); }
.process-list li { min-height: 290px; padding: var(--space-3); background: var(--color-surface); border-right: 1px solid var(--color-border); border-bottom: 1px solid var(--color-border); }
.process-list > li > span { color: var(--color-accent); font-family: var(--font-model); font-size: 12px; }
.process-list h3 { margin-top: var(--space-8); }
.process-list p { font-size: 14px; }
.customization { background: var(--color-bg); }
.customization h2, .customization h3 { color: var(--color-text); }
.customization p { color: var(--color-text-2); }
.customization__grid { display: grid; grid-template-columns: .8fr 1.2fr; gap: var(--space-10); align-items: start; }
.option-matrix { display: grid; grid-template-columns: 1fr 1fr; border-top: 1px solid var(--color-border); border-left: 1px solid var(--color-border); box-shadow: var(--shadow-card); }
.option-matrix article { min-height: 220px; padding: var(--space-3); background: var(--color-surface); border-right: 1px solid var(--color-border); border-bottom: 1px solid var(--color-border); }
.option-matrix span { color: var(--color-muted); font-family: var(--font-model); font-size: 11px; }
.option-matrix h3 { margin-top: var(--space-6); }
.commercial-band { padding-block: var(--space-10); background: var(--color-surface); border-block: 1px solid var(--color-border); }
.commercial-band .eyebrow { color: var(--color-accent); }
.commercial-band h2, .commercial-band dt, .commercial-band dd { color: var(--color-text); }
.commercial-terms { display: grid; grid-template-columns: repeat(3, 1fr); border-top: 1px solid var(--color-border); border-left: 1px solid var(--color-border); }
.commercial-terms div { min-height: 180px; padding: var(--space-3); border-right: 1px solid var(--color-border); border-bottom: 1px solid var(--color-border); }
.commercial-terms dt { font-family: var(--font-heading); font-size: 20px; font-weight: 600; }
.commercial-terms dd { margin-top: var(--space-4); }
.oem-certifications { background: var(--color-surface); }

.page-main { min-height: 65vh; padding-block: var(--space-10); }
.prose-page { max-width: 900px; }
.prose-page header { margin-bottom: var(--space-6); }
.entry-content { color: var(--color-text-2); font-size: 18px; }
.empty-state { padding: var(--space-10) 0; text-align: center; }
.contact-page__layout { display: grid; grid-template-columns: .8fr 1.2fr; gap: var(--space-10); }
.contact-list { border-top: 1px solid var(--color-border); }
.contact-list > * { min-height: 92px; display: grid; grid-template-columns: 170px 1fr; align-items: center; padding: var(--space-2) 0; border-bottom: 1px solid var(--color-border); }
.contact-list span { color: var(--color-muted); font-size: 11px; text-transform: uppercase; }
.contact-list strong { overflow-wrap: anywhere; font-weight: 500; }

.site-footer { padding: var(--space-10) 0 var(--space-3); background: var(--color-surface); border-top: 1px solid var(--color-border); }
.site-footer__grid { display: grid; grid-template-columns: 1.1fr .9fr 1fr; gap: var(--space-10); }
.brand--footer { margin-bottom: var(--space-3); }
.site-footer h2 { font-size: 15px; }
.site-footer ul { margin: 0; padding: 0; list-style: none; columns: 2; }
.site-footer li { margin-bottom: 8px; color: var(--color-text-2); font-size: 13px; }
.site-footer p, .site-footer address { color: var(--color-muted); font-size: 13px; font-style: normal; }
.site-footer__bottom { display: flex; justify-content: space-between; gap: var(--space-3); margin-top: var(--space-8); padding-top: var(--space-3); border-top: 1px solid var(--color-border); font-size: 12px; }
.site-footer__bottom p { margin: 0; }
.site-footer__bottom div { display: flex; gap: var(--space-3); }
.whatsapp-float { position: fixed; right: var(--space-3); bottom: var(--space-3); z-index: 90; min-height: 48px; display: flex; align-items: center; gap: 10px; padding: 7px 14px 7px 7px; color: var(--color-text); background: var(--color-whatsapp); border-radius: 24px; font-size: 13px; font-weight: 700; box-shadow: var(--shadow-card); }
.whatsapp-float__icon { width: 34px; height: 34px; display: grid; place-items: center; color: var(--color-surface); background: #0F7B3C; border-radius: 50%; font-size: 10px; }

@media (max-width: 1100px) {
    h1 { font-size: 52px; }
    h2 { font-size: 36px; }
    .site-header__bar { grid-template-columns: 180px minmax(0, 1fr) auto; gap: 8px; }
    .site-nav__list a { padding-inline: 8px; font-size: 12px; }
    .home-hero__content { grid-template-columns: 1fr .75fr; gap: var(--space-4); }
    .category-grid, .product-grid { grid-template-columns: repeat(3, minmax(0, 1fr)); }
    .category-card:first-child { grid-column: span 1; }
    .engineering-story__grid, .proof-wall__grid { gap: var(--space-6); }
    .process-list { grid-template-columns: repeat(3, 1fr); }
    .inquiry-workspace__grid { gap: var(--space-5); }
    .inquiry-form-panel { padding-left: var(--space-5); }
}

@media (max-width: 820px) {
    h1 { font-size: 44px; }
    h2 { font-size: 32px; }
    .container { width: min(calc(100% - 32px), var(--max-width)); }
    .site-header__bar { min-height: 72px; grid-template-columns: 1fr auto auto; }
    .nav-toggle { display: block; order: 2; }
    .header-inquiry { order: 3; }
    .site-nav { position: absolute; top: 72px; left: 0; right: 0; display: none; padding: var(--space-2); background: var(--color-surface); border-bottom: 1px solid var(--color-border); }
    .site-nav.is-open { display: block; }
    .site-nav__list { display: block; }
    .site-nav__list a { padding: 12px 0; border-bottom: 1px solid var(--color-border); }
    .home-hero { min-height: 760px; }
    .home-hero__content { grid-template-columns: 1fr; padding-block: var(--space-8); }
    .home-hero__product { position: absolute; right: -5%; bottom: 16px; width: 44%; min-height: 330px; opacity: .72; }
    .home-hero__product img { height: 320px; }
    .hero-proof { width: 70%; }
    .section { padding-block: var(--space-10); }
    .category-grid, .product-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
    .engineering-story__grid, .proof-wall__grid, .customization__grid, .inquiry-workspace__grid, .single-product__layout, .contact-page__layout { grid-template-columns: 1fr; gap: var(--space-6); }
    .oem-strip__content { grid-template-columns: 1fr; gap: var(--space-3); }
    .archive-hero__heading { grid-template-columns: 1fr; gap: var(--space-3); }
    .single-product__summary { position: static; }
    .inquiry-form-panel { padding: var(--space-6) 0 0; border-top: 1px solid var(--color-border); border-left: 0; }
    .process-list { grid-template-columns: repeat(2, 1fr); }
    .site-footer__grid { grid-template-columns: 1fr 1fr; }
    .site-footer__grid > div:first-child { grid-column: 1 / -1; }
}

@media (max-width: 600px) {
    h1 { font-size: 38px; }
    h2 { font-size: 28px; }
    .brand__copy small { display: none; }
    .header-inquiry > span { display: none; }
    .header-inquiry { padding: 7px; }
    .home-hero { min-height: 720px; }
    .home-hero__lead { font-size: 16px; }
    .home-hero__product { right: -12%; width: 58%; }
    .hero-proof { width: 100%; }
    .hero-proof div { min-width: 0; flex: 1; padding-right: 8px; }
    .hero-proof dd { font-size: 17px; }
    .section-heading--split { display: block; }
    .section-heading--split > * + * { margin-top: var(--space-2); }
    .category-grid, .product-grid { grid-template-columns: 1fr; }
    .category-card { min-height: 320px; }
    .product-rail { grid-auto-columns: 84%; }
    .factory-stats { grid-template-columns: 1fr 1fr; }
    .certificate-images { grid-template-columns: 1fr; }
    .certificate-images img { aspect-ratio: 16 / 9; }
    .pdp-actions { grid-template-columns: 1fr; }
    .single-product__summary h1 { font-size: 38px; }
    .product-gallery__thumbs { grid-template-columns: repeat(4, 1fr); }
    .product-tabs__list { gap: var(--space-3); }
    .process-list, .option-matrix, .commercial-terms { grid-template-columns: 1fr; }
    .process-list li { min-height: 210px; }
    .site-footer__grid { grid-template-columns: 1fr; }
    .site-footer__grid > div:first-child { grid-column: auto; }
    .whatsapp-float { display: none; }
    .mobile-product-cta { position: fixed; left: 0; right: 0; bottom: 0; z-index: 80; min-height: 72px; display: grid; grid-template-columns: 1fr auto; align-items: center; gap: 12px; padding: 10px var(--space-2); background: var(--color-surface); border-top: 1px solid var(--color-border); box-shadow: 0 -1px 2px rgba(16, 24, 40, .06); }
    .mobile-product-cta > span { display: grid; min-width: 0; }
    .mobile-product-cta strong { overflow: hidden; font-family: var(--font-model); font-size: 13px; text-overflow: ellipsis; white-space: nowrap; }
    .mobile-product-cta small { color: var(--color-muted); font-size: 10px; }
}