:root {
  --brand-blue: #18538c;
  --brand-blue-deep: #103c69;
  --brand-gold: #c1974f;
  --brand-ice: #f8fbfd;
  --brand-soft: #eef5fa;
  --ink: #172836;
  --muted: #5a6b79;
  --line: #d6e0e8;
  --paper: #ffffff;
  --danger: #9b3535;
  --shell: min(1180px, calc(100% - 40px));
  color: var(--ink);
  background: var(--brand-ice);
  font-family: "PingFang SC", "Microsoft YaHei", system-ui, sans-serif;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
html.menu-open { overflow: hidden; }
body { margin: 0; color: var(--ink); background: var(--paper); line-height: 1.75; }
body, button, input, textarea { font: inherit; letter-spacing: 0; }
img { display: block; max-width: 100%; }
a { color: inherit; text-decoration: none; }
button, a { -webkit-tap-highlight-color: transparent; }
:focus-visible { outline: 3px solid rgba(193, 151, 79, .5); outline-offset: 3px; }
.shell { width: var(--shell); margin-inline: auto; }
.sr-only { position: absolute; width: 1px; height: 1px; padding: 0; margin: -1px; overflow: hidden; clip: rect(0, 0, 0, 0); white-space: nowrap; border: 0; }
.skip-link { position: fixed; z-index: 100; left: 16px; top: -60px; padding: 10px 14px; color: #fff; background: var(--brand-blue-deep); }
.skip-link:focus { top: 12px; }

.site-header { position: sticky; z-index: 30; top: 0; background: rgba(248, 251, 253, .96); border-bottom: 1px solid var(--line); }
.header-inner { min-height: 78px; display: flex; align-items: center; justify-content: space-between; gap: 30px; }
.brand { flex: 0 0 auto; }
.brand img { width: 154px; height: auto; }
.site-nav { display: flex; align-items: center; gap: 26px; font-size: 15px; }
.site-nav a { position: relative; padding: 26px 0 23px; color: #354b5e; white-space: nowrap; }
.site-nav a::after { content: ""; position: absolute; right: 0; bottom: 18px; left: 0; height: 2px; background: transparent; }
.site-nav a:hover, .site-nav a[aria-current="page"] { color: var(--brand-blue); }
.site-nav a[aria-current="page"]::after { background: var(--brand-gold); }
.menu-toggle { display: none; width: 44px; height: 44px; padding: 10px; border: 0; background: transparent; cursor: pointer; }
.menu-toggle > span:not(.sr-only) { display: block; width: 22px; height: 2px; margin: 4px auto; background: var(--brand-blue-deep); transition: transform .2s ease, opacity .2s ease; }

.eyebrow { margin: 0 0 11px; color: var(--brand-blue); font-size: 13px; font-weight: 700; }
h1, h2, h3 { margin: 0; font-weight: 650; line-height: 1.25; text-wrap: balance; }
h1 { font-size: 58px; }
h2 { font-size: 40px; }
h3 { font-size: 21px; }
p { margin: 0 0 18px; }

.hero { overflow: hidden; background: var(--brand-ice); border-bottom: 1px solid var(--line); }
.hero-inner { width: min(1500px, calc(100% - 40px)); display: grid; grid-template-columns: minmax(340px, 410px) minmax(0, 1fr); gap: clamp(36px, 8.6vw, 161px); align-items: center; min-height: 656px; padding-block: 0; }
.hero-copy { width: 100%; max-width: 410px; min-width: 0; padding-block: 16px; transform: translateX(max(0px, calc((100vw - 1500px) / 4))); }
.hero-wordmark { width: min(350px, 100%); height: auto; margin: 0 0 36px; }
.hero-copy h1 { max-width: 390px; margin: 0 0 16px; color: var(--brand-blue-deep); font-size: 40px; line-height: 1.28; }
.hero-summary { max-width: 390px; margin: 0; color: var(--muted); font-size: 16px; line-height: 1.7; }
.hero-actions { display: flex; flex-wrap: wrap; gap: 12px; margin: 30px 0 0; }
.button { min-height: 46px; display: inline-flex; align-items: center; justify-content: center; padding: 10px 18px; border: 1px solid transparent; border-radius: 4px; font-weight: 650; cursor: pointer; text-align: center; }
.button.primary { color: #fff; background: var(--brand-blue); }
.button.primary:hover { background: var(--brand-blue-deep); }
.button.secondary { color: var(--brand-blue-deep); border-color: #9db2c4; background: var(--paper); }
.button.secondary:hover { border-color: var(--brand-gold); color: var(--brand-blue); }
.hero-facts { display: grid; grid-template-columns: minmax(120px, .7fr) minmax(0, 1.3fr); gap: 18px; margin: 0; padding-top: 20px; border-top: 1px solid #c8d7e3; }
.hero-facts div { min-width: 0; }
.hero-facts dt { color: var(--muted); font-size: 12px; }
.hero-facts dd { margin: 3px 0 0; font-size: 14px; font-weight: 650; overflow-wrap: break-word; }
.hero-showcase { width: calc(100% + max(20px, (100vw - 1500px) / 2)); min-width: 0; }
.hero-product-stage { aspect-ratio: 1133 / 663; overflow: hidden; background: transparent; }
.hero-product-visual { width: 100%; height: 100%; display: block; }
.hero-product-visual img { width: 100%; height: 100%; object-fit: contain; object-position: right center; }

.proof-strip { color: #fff; background: var(--brand-blue-deep); border-top: 3px solid var(--brand-gold); }
.proof-grid { display: grid; grid-template-columns: repeat(3, 1fr); }
.proof-grid > div { min-width: 0; padding: 22px 28px; border-left: 1px solid rgba(255, 255, 255, .16); }
.proof-grid > div:last-child { border-right: 1px solid rgba(255, 255, 255, .16); }
.proof-grid strong, .proof-grid span { display: block; }
.proof-grid strong { margin-bottom: 4px; color: #eed7ad; font-size: 13px; }
.proof-grid span { font-size: 14px; }

.band { padding-block: 72px; }
.muted-band, .editorial-band { background: var(--brand-soft); }
.section-heading { max-width: 780px; margin-bottom: 40px; }
.section-heading h2 { margin-bottom: 14px; }
.section-heading > p:last-child { color: var(--muted); font-size: 17px; }
.section-heading-split { max-width: none; display: grid; grid-template-columns: minmax(260px, .85fr) minmax(0, 1.15fr); gap: 84px; align-items: end; }
.section-heading-split > p, .section-heading-split > div:last-child p { margin: 0; color: var(--muted); font-size: 17px; }
.section-heading-split > div:last-child p + p { margin-top: 16px; }
.split-heading { max-width: none; display: flex; align-items: end; justify-content: space-between; gap: 24px; }
.split-heading .text-link { margin-bottom: 8px; }
.product-index-band .section-heading { max-width: none; padding-left: 27px; }
.product-index-band .section-heading > p:last-child { max-width: 780px; }

.product-grid { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 20px; }
.product-card { min-width: 0; display: grid; grid-template-columns: minmax(180px, .92fr) minmax(0, 1.08fr); overflow: hidden; border: 1px solid var(--line); border-radius: 6px; background: var(--paper); }
.product-media { min-height: 350px; display: grid; place-items: center; padding: 22px; background: var(--brand-ice); overflow: hidden; }
.product-media img { width: 100%; height: 100%; object-fit: contain; transition: transform .3s ease; }
.product-card:hover .product-media img { transform: scale(1.025); }
.product-card-copy { min-width: 0; display: flex; flex: 1; flex-direction: column; padding: 28px 24px; }
.product-card h3 { margin-bottom: 12px; font-size: 20px; overflow-wrap: break-word; }
.product-card-copy > p:not(.eyebrow) { color: var(--muted); }
.compact-facts { margin: auto 0 18px; padding-top: 12px; border-top: 1px solid var(--line); }
.compact-facts div { display: grid; grid-template-columns: auto minmax(0, 1fr); gap: 16px; }
.compact-facts div + div { margin-top: 8px; padding-top: 8px; border-top: 1px solid var(--line); }
.compact-facts dt { color: var(--muted); }
.compact-facts dd { margin: 0; text-align: right; font-weight: 650; overflow-wrap: break-word; }
.text-link { display: inline-flex; align-items: center; gap: 8px; color: var(--brand-blue); font-weight: 650; }
.text-link:hover { color: var(--brand-blue-deep); }

.fact-band { color: #fff; background: var(--brand-blue); }
.fact-band .eyebrow { color: #f0d6a7; }
.fact-layout { display: grid; grid-template-columns: minmax(260px, .82fr) minmax(0, 1.18fr); gap: 84px; align-items: start; }
.fact-copy { max-width: 700px; font-size: 17px; }
.fact-copy p { margin-bottom: 22px; }
.fact-band .text-link { color: #fff; }

.about-intro { margin-bottom: 0; }
.about-stat-band { border-block: 1px solid var(--line); }
.about-stat-grid { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); }
.about-stat { min-width: 0; padding: 30px; border-left: 1px solid var(--line); }
.about-stat:last-child { border-right: 1px solid var(--line); }
.about-stat strong, .about-stat span { display: block; }
.about-stat strong { color: var(--brand-blue-deep); font-size: 34px; line-height: 1.25; overflow-wrap: break-word; }
.about-stat span { margin-top: 8px; color: var(--muted); font-size: 14px; }
.principle-grid { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); border-block: 1px solid var(--line); }
.principle-grid article { min-width: 0; padding: 28px 30px; border-left: 1px solid var(--line); }
.principle-grid article:last-child { border-right: 1px solid var(--line); }
.principle-grid span { display: block; margin-bottom: 24px; color: var(--brand-gold); font-size: 14px; font-weight: 700; }
.principle-grid h3 { margin-bottom: 12px; color: var(--brand-blue-deep); }
.principle-grid p { margin: 0; color: var(--muted); }

.article-grid { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 30px; }
.article-card { min-width: 0; }
.article-card-media { aspect-ratio: 16 / 10; display: grid; place-items: center; overflow: hidden; background: var(--paper); border-top: 3px solid var(--brand-gold); }
.article-card-media img { width: 100%; height: 100%; padding: 18px; object-fit: contain; transition: transform .3s ease; }
.article-card:hover .article-card-media img { transform: scale(1.025); }
.article-card-copy { display: flex; flex-direction: column; padding-top: 20px; }
.article-card h3 { min-height: 3.1em; margin-bottom: 14px; font-size: 23px; overflow-wrap: break-word; }
.article-card > p:not(.eyebrow) { color: var(--muted); }
.article-card-copy > p:not(.eyebrow) { color: var(--muted); }
.article-index { grid-template-columns: 1fr; gap: 0; }
.article-index-band > .section-heading { max-width: none; }
.article-index .article-card { display: grid; grid-template-columns: minmax(320px, .82fr) minmax(0, 1.18fr); gap: 48px; align-items: center; padding-block: 34px; border-top: 1px solid var(--line); }
.article-index .article-card:last-child { border-bottom: 1px solid var(--line); }
.article-index .article-card-media { border-top: 0; background: var(--brand-ice); }
.article-index .article-card-copy { min-height: 0; padding: 8px 0; }
.article-index .article-card h3 { min-height: 0; margin-bottom: 14px; font-size: 28px; }
.article-index .article-card-copy > p:not(.eyebrow) { max-width: 650px; margin-bottom: 0; }
.article-card-copy .text-link { margin-top: auto; }
.article-index .article-card-copy .text-link { margin-top: 24px; }

.faq-preview { border-top: 1px solid var(--line); }
.faq-preview .section-heading { max-width: none; }
.faq-list { border-top: 1px solid var(--line); }
.faq-list details { border-bottom: 1px solid var(--line); }
.faq-list summary { position: relative; padding: 22px 44px 22px 0; font-size: 18px; font-weight: 650; cursor: pointer; list-style: none; }
.faq-list summary::-webkit-details-marker { display: none; }
.faq-list summary::after { content: "+"; position: absolute; top: 16px; right: 8px; color: var(--brand-gold); font-size: 26px; font-weight: 400; }
.faq-list details[open] summary::after { content: "−"; }
.faq-list details p { max-width: 840px; padding: 0 44px 22px 0; color: var(--muted); }
.faq-list.large { max-width: 920px; }
.faq-preview-grid { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 0 42px; border-top: 0; }
.faq-preview-grid details { border-top: 1px solid var(--line); }
.section-action { margin-top: 32px; }

.page-hero { padding-block: 68px 54px; background: var(--brand-ice); border-bottom: 1px solid var(--line); }
.page-hero .shell { padding-left: 24px; border-left: 3px solid var(--brand-gold); }
.page-hero h1 { max-width: 920px; margin-bottom: 18px; color: var(--brand-blue-deep); font-size: 50px; overflow-wrap: break-word; }
.page-hero p:last-child { max-width: 780px; margin: 0; color: var(--muted); font-size: 18px; }
.breadcrumb { display: flex; flex-wrap: wrap; gap: 9px; padding-block: 20px; color: var(--muted); font-size: 14px; }
.breadcrumb a:hover { color: var(--brand-blue); }

.product-hero { padding: 20px 0 68px; }
.product-hero-grid { display: grid; grid-template-columns: minmax(360px, .95fr) minmax(0, 1.05fr); gap: 66px; align-items: center; }
.product-gallery { min-width: 0; }
.product-detail-media { aspect-ratio: 1 / 1; display: grid; place-items: center; padding: 38px; background: var(--brand-ice); }
.product-detail-media img { width: 100%; height: 100%; object-fit: contain; }
.product-gallery-thumbnails { display: grid; grid-template-columns: repeat(auto-fit, 84px); justify-content: start; gap: 10px; margin-top: 10px; }
.product-gallery-thumbnail { aspect-ratio: 1 / 1; min-width: 0; padding: 7px; overflow: hidden; border: 1px solid var(--line); border-radius: 3px; background: var(--paper); cursor: pointer; }
.product-gallery-thumbnail[aria-pressed="true"] { border-color: var(--brand-blue); box-shadow: inset 0 0 0 1px var(--brand-blue); }
.product-gallery-thumbnail img { width: 100%; height: 100%; object-fit: contain; }
.product-intro { min-width: 0; }
.product-intro h1 { margin-bottom: 20px; color: var(--brand-blue-deep); font-size: 48px; overflow-wrap: break-word; }
.product-summary { color: var(--muted); font-size: 19px; }
.product-quick-points { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); margin: 24px 0 0; padding: 17px 0; border-block: 1px solid var(--line); list-style: none; }
.product-quick-points li { min-width: 0; padding: 0 14px; color: var(--brand-blue-deep); font-size: 14px; font-weight: 700; text-align: center; }
.product-quick-points li + li { border-left: 1px solid var(--line); }
.registration-facts { margin: 26px 0 0; border-top: 1px solid var(--line); }
.registration-facts > div { display: grid; grid-template-columns: 150px minmax(0, 1fr); gap: 18px; padding: 14px 0; border-bottom: 1px solid var(--line); }
.registration-facts dt { color: var(--muted); }
.registration-facts dd { margin: 0; font-weight: 650; overflow-wrap: break-word; }
.certificate-link { margin-top: 20px; }
.product-highlight-strip { background: var(--brand-blue); border-top: 3px solid var(--brand-gold); color: #fff; }
.product-highlight-grid { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); margin-block: 0; }
.product-highlight-grid > div { min-width: 0; padding: 24px 28px; border-left: 1px solid rgba(255, 255, 255, .18); }
.product-highlight-grid > div:last-child { border-right: 1px solid rgba(255, 255, 255, .18); }
.product-highlight-grid dt { color: #eed7ad; font-size: 13px; font-weight: 700; }
.product-highlight-grid dd { margin: 4px 0 0; font-size: 14px; overflow-wrap: break-word; }
.detail-band { background: var(--brand-soft); }
.product-chapters { border-top: 1px solid var(--line); }
.product-chapter { display: grid; grid-template-columns: 70px 220px minmax(0, 1fr); gap: 30px; align-items: start; padding: 32px 0; border-bottom: 1px solid var(--line); }
.product-chapter-number { color: var(--brand-gold); font-size: 14px; font-weight: 700; }
.product-chapter h3 { color: var(--brand-blue-deep); font-size: 27px; }
.product-chapter p { margin: 0; color: #374b5a; }
.product-boundary-band { color: #fff; background: var(--brand-blue-deep); border-top: 3px solid var(--brand-gold); }
.product-boundary-layout { display: grid; grid-template-columns: minmax(260px, .85fr) minmax(0, 1.15fr); gap: 84px; }
.product-boundary-layout .eyebrow { color: #f0d6a7; }
.product-boundary-layout ul { margin: 0; padding-left: 22px; }
.product-boundary-layout li + li { margin-top: 12px; }
.related-products-band { background: var(--paper); border-top: 1px solid var(--line); }
.related-product-grid { display: grid; grid-template-columns: repeat(5, minmax(0, 1fr)); gap: 14px; }
.related-product-tile { min-width: 0; display: flex; flex-direction: column; overflow: hidden; color: inherit; background: var(--paper); }
.related-product-media { aspect-ratio: 4 / 3; display: grid; place-items: center; padding: 16px; overflow: hidden; background: var(--brand-ice); }
.related-product-media img { width: 100%; height: 100%; object-fit: contain; transition: transform .3s ease; }
.related-product-tile:hover .related-product-media img { transform: scale(1.025); }
.related-product-copy { display: flex; flex: 1; flex-direction: column; padding: 18px; }
.related-product-copy strong { color: var(--brand-blue-deep); font-size: 17px; line-height: 1.45; overflow-wrap: break-word; }
.related-product-link { margin-top: auto; padding-top: 18px; color: var(--brand-blue); font-size: 14px; font-weight: 650; }

.product-hero-story { padding-top: 8px; }
.product-hero-story .product-detail-media { min-height: 540px; border: 0; background: #f5f8fb; }
.product-story-band { padding-block: 78px; background: #f7fafc; border-bottom: 1px solid var(--line); }
.product-story-heading { margin-bottom: 48px; }
.product-story-grid { display: grid; grid-template-columns: minmax(0, 1.05fr) minmax(380px, .95fr); gap: 74px; align-items: center; }
.product-story-media { display: grid; grid-template-rows: minmax(0, 1fr) auto; place-items: center; gap: 16px; margin: 0; padding: 28px; overflow: hidden; background: var(--paper); }
.product-story-media img { width: 100%; height: auto; aspect-ratio: 4 / 3; object-fit: contain; }
.product-story-media figcaption { width: 100%; padding-top: 12px; border-top: 1px solid var(--line); color: var(--muted); font-size: 13px; text-align: center; }
.product-feature-list { border-top: 1px solid var(--line); }
.product-feature-list article { display: grid; grid-template-columns: 48px minmax(0, 1fr); gap: 22px; padding: 30px 0; border-bottom: 1px solid var(--line); }
.product-feature-list article > span, .product-use-steps > li > span { color: var(--brand-gold); font-size: 13px; font-weight: 700; }
.product-feature-list h3 { margin-bottom: 8px; color: var(--brand-blue-deep); font-size: 27px; }
.product-feature-list p { margin: 0; color: var(--muted); }
.product-technical-facts { display: grid; grid-template-columns: minmax(260px, .72fr) minmax(0, 1.28fr); gap: 72px; align-items: start; margin-top: 76px; padding: 38px 0; border-top: 1px solid var(--line); border-bottom: 1px solid var(--line); }
.product-technical-facts h2 { margin-bottom: 8px; color: var(--brand-blue-deep); font-size: 31px; }
.product-technical-facts > div > p:last-child { margin: 0; color: var(--muted); font-size: 14px; }
.product-technical-facts dl { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); margin: 0; }
.product-technical-facts dl > div { min-width: 0; padding: 4px 24px; border-left: 1px solid var(--line); }
.product-technical-facts dt { color: var(--muted); font-size: 13px; }
.product-technical-facts dd { margin: 7px 0 0; color: var(--brand-blue-deep); font-size: 18px; font-weight: 700; overflow-wrap: break-word; }

.product-use-grid { display: grid; grid-template-columns: minmax(260px, .72fr) minmax(0, 1.28fr); gap: 72px; align-items: start; margin-top: 92px; padding-top: 58px; border-top: 1px solid var(--line); }
.product-use-grid h2 { max-width: 430px; color: var(--brand-blue-deep); font-size: 31px; }
.product-use-grid > div > p:last-child { margin-top: 16px; color: var(--muted); }
.product-use-steps { display: grid; grid-template-columns: repeat(auto-fit, minmax(145px, 1fr)); margin: 0; padding: 0; border-top: 3px solid var(--brand-gold); list-style: none; }
.product-use-steps li { min-width: 0; padding: 24px 20px 0; }
.product-use-steps li:first-child { padding-left: 0; }
.product-use-steps li + li { border-left: 1px solid var(--line); }
.product-use-steps h3 { margin: 9px 0 8px; color: var(--brand-blue-deep); font-size: 19px; }
.product-use-steps p { margin: 0; color: var(--muted); font-size: 14px; }
.product-specifications { display: grid; grid-template-columns: minmax(300px, .85fr) minmax(0, 1.15fr); gap: 72px; align-items: end; margin-top: 76px; padding-top: 42px; border-top: 1px solid var(--line); }
.product-specifications h2 { margin-bottom: 8px; color: var(--brand-blue-deep); font-size: 31px; }
.product-specifications p { margin: 0; color: var(--muted); }
.product-specifications ul { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 0; margin: 0; padding: 0; border-top: 1px solid var(--line); list-style: none; }
.product-specifications li { padding: 15px 12px; border-bottom: 1px solid var(--line); color: var(--brand-blue-deep); font-weight: 700; text-align: center; }

.product-resources-band { background: var(--paper); }
.product-resource-grid { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 22px; }
.product-resource { min-width: 0; display: grid; grid-template-columns: 180px minmax(0, 1fr); align-items: center; overflow: hidden; border-block: 1px solid var(--line); background: var(--paper); }
.product-resource > a { aspect-ratio: 760 / 1077; height: 230px; display: grid; place-items: center; padding: 10px; background: #f3f6f8; }
.product-resource img { width: 100%; height: 100%; object-fit: contain; }
.product-resource > div { min-width: 0; padding: 24px; }
.product-resource h3 { margin-bottom: 20px; overflow-wrap: break-word; }
.product-faq-band { background: var(--brand-soft); }
.product-faq-layout, .faq-group { display: grid; grid-template-columns: minmax(240px, .72fr) minmax(0, 1.28fr); gap: 72px; align-items: start; }
.product-faq-layout > div:first-child > p:last-child { margin-top: 16px; color: var(--muted); }
.faq-index { display: flex; flex-wrap: wrap; gap: 10px; padding-block: 24px; }
.faq-index a { padding: 8px 12px; border: 1px solid var(--line); border-radius: 3px; color: var(--brand-blue-deep); font-size: 14px; }
.faq-index a:hover { border-color: var(--brand-gold); color: var(--brand-blue); }
.faq-general-band { padding-top: 58px; background: var(--brand-soft); }
.faq-product-group { scroll-margin-top: 78px; }
.faq-product-group:nth-of-type(even) { background: var(--brand-soft); }
.faq-group .faq-list.large { max-width: none; }
.faq-group > div:first-child .text-link { margin-top: 22px; }

.document-grid { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 20px; }
.qualification-document { min-width: 0; display: flex; flex-direction: column; overflow: hidden; border: 1px solid var(--line); border-radius: 6px; background: var(--paper); }
.document-media { aspect-ratio: 760 / 1077; display: grid; place-items: center; padding: 14px; background: #f3f6f8; overflow: hidden; }
.document-media img { width: 100%; height: 100%; object-fit: contain; transition: transform .25s ease; }
.document-media:hover img { transform: scale(1.018); }
.document-copy { display: flex; flex: 1; flex-direction: column; padding: 20px; }
.document-copy h3 { margin-bottom: 12px; font-size: 20px; overflow-wrap: break-word; }
.document-copy p:not(.eyebrow) { color: var(--muted); font-size: 14px; }
.document-copy .text-link { margin-top: auto; }
.inspection-reports-band { border-bottom: 1px solid var(--line); }
.inspection-report-grid { margin-top: 42px; }
.inspection-report-meta { margin: 0 0 20px; border-top: 1px solid var(--line); }
.inspection-report-meta > div { display: grid; grid-template-columns: 84px minmax(0, 1fr); gap: 12px; padding: 9px 0; border-bottom: 1px solid var(--line); font-size: 13px; }
.inspection-report-meta dt { color: var(--muted); }
.inspection-report-meta dd { margin: 0; font-weight: 650; overflow-wrap: break-word; }
.table-wrap { overflow-x: auto; }
table { width: 100%; border-collapse: collapse; background: var(--paper); }
th, td { padding: 16px; border-bottom: 1px solid var(--line); text-align: left; vertical-align: top; }
thead th { color: #fff; background: var(--brand-blue-deep); font-size: 14px; }
tbody th { min-width: 240px; font-weight: 650; }
tbody th a { color: var(--brand-blue); }
.table-note { margin-top: 18px; color: var(--muted); font-size: 14px; }

.article-page { padding-bottom: 88px; }
.article-header { max-width: 1000px; padding-top: 54px; padding-bottom: 38px; }
.article-header h1 { max-width: 100%; margin-bottom: 20px; color: var(--brand-blue-deep); font-size: 36px; line-height: 1.3; white-space: nowrap; }
.article-header h1.is-long { font-size: 34px; }
.article-header h1.is-very-long { font-size: 32px; }
.article-summary { max-width: 760px; color: var(--muted); font-size: 20px; }
.article-meta { display: flex; flex-wrap: wrap; gap: 10px 24px; padding-top: 18px; border-top: 1px solid var(--line); color: var(--muted); font-size: 14px; }
.article-cover { max-width: 1000px; aspect-ratio: 16 / 9; display: grid; place-items: center; margin-bottom: 60px; overflow: hidden; background: var(--brand-ice); }
.article-cover img { width: 100%; height: 100%; padding: 36px; object-fit: contain; }
.article-layout { max-width: 1000px; }
.article-body { width: 100%; min-width: 0; font-size: 17px; }
.article-body h2 { margin: 46px 0 18px; color: var(--brand-blue-deep); font-size: 31px; }
.article-body h3 { margin: 32px 0 14px; font-size: 24px; }
.article-body h4 { margin: 28px 0 12px; font-size: 20px; }
.article-body p, .article-body li { color: #354955; }
.article-body a { color: var(--brand-blue); text-decoration: underline; text-underline-offset: 3px; }
.article-body blockquote { margin: 30px 0; padding: 22px 24px; border-left: 4px solid var(--brand-gold); background: var(--brand-soft); }
.article-body figure { margin: 34px 0; }
.article-body figure img { width: 100%; height: auto; }
.article-body figcaption { margin-top: 8px; color: var(--muted); font-size: 14px; }
.article-body table { max-width: 100%; display: block; margin: 30px 0; overflow-x: auto; font-size: 15px; }
.article-pagination { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 40px; margin-top: 68px; padding-top: 28px; border-top: 1px solid var(--line); }
.article-pagination-link { min-width: 0; color: var(--brand-blue-deep); }
.article-pagination-link.next { grid-column: 2; text-align: right; }
.article-pagination-link span { display: block; margin-bottom: 8px; color: var(--brand-gold); font-size: 13px; font-weight: 650; }
.article-pagination-link strong { display: block; overflow: hidden; font-size: 17px; text-overflow: ellipsis; white-space: nowrap; }
.article-pagination-link:hover strong { color: var(--brand-blue); }

.about-intro-grid { display: grid; grid-template-columns: minmax(0, .9fr) minmax(480px, 1.1fr); gap: 70px; align-items: center; }
.about-intro-grid h2 { margin-bottom: 24px; color: var(--brand-blue-deep); }
.about-intro-grid p:last-child { margin: 0; color: var(--muted); }
.about-visual { aspect-ratio: 19 / 14; margin: 0; overflow: hidden; background: var(--brand-ice); }
.about-visual img { width: 100%; height: 100%; object-fit: cover; }

.not-found { min-height: 64svh; display: grid; place-items: center; text-align: center; }
.not-found .shell { max-width: 620px; }
.not-found h1 { margin-bottom: 18px; color: var(--brand-blue-deep); }
.not-found .hero-actions { justify-content: center; }

.site-footer { color: #dce8f1; background: var(--brand-blue-deep); border-top: 4px solid var(--brand-gold); }
.footer-grid { display: grid; grid-template-columns: minmax(280px, 1.35fr) minmax(220px, 1fr) minmax(160px, .65fr); gap: 72px; padding-block: 52px; }
.footer-wordmark { display: inline-block; margin-bottom: 16px; color: #fff; font-family: "Songti SC", SimSun, serif; font-size: 31px; font-weight: 700; }
.site-footer h2 { margin-bottom: 15px; color: #fff; font-size: 17px; }
.site-footer p { color: #bed0de; font-size: 14px; }
.site-footer nav { display: flex; flex-direction: column; align-items: flex-start; gap: 9px; }
.site-footer nav a { color: #dce8f1; font-size: 14px; overflow-wrap: break-word; }
.site-footer nav a:hover { color: #fff; }
.footer-bottom { display: flex; flex-direction: column; align-items: flex-start; gap: 10px; padding-block: 20px 24px; border-top: 1px solid rgba(255, 255, 255, .14); color: #9fb7c8; font-size: 13px; }
.site-footer .footer-notice { max-width: 920px; margin: 0; color: #9fb7c8; font-size: 13px; line-height: 1.7; }
.footer-record { color: #bed0de; }
.footer-record:hover { color: #fff; }

@media (max-width: 1020px) {
  .site-nav { gap: 18px; }
  .hero-inner { grid-template-columns: minmax(0, .9fr) minmax(430px, 1.1fr); gap: 34px; }
  .hero-copy { transform: none; }
  .hero-showcase { width: 100%; }
  .fact-layout { gap: 48px; }
  .product-hero-grid { gap: 42px; }
  .product-story-grid { gap: 48px; }
  .product-use-grid, .product-specifications { gap: 44px; }
  .related-product-grid { grid-template-columns: repeat(3, minmax(0, 1fr)); }
  .article-header h1 { font-size: 32px; }
  .article-header h1.is-long { font-size: 30px; }
  .article-header h1.is-very-long { font-size: 27px; }
}

@media (max-width: 900px) {
  .hero-inner, .product-hero-grid, .product-story-grid, .about-intro-grid { grid-template-columns: 1fr; }
  .hero-inner { min-height: 0; gap: 36px; padding-block: 56px; }
  .hero-product-stage { aspect-ratio: 19 / 14; }
  .hero-product-visual img { object-fit: cover; object-position: center; }
  .hero-copy { max-width: 680px; }
  .hero-showcase { width: 100%; }
  .product-grid { grid-template-columns: 1fr; }
  .product-card { grid-template-columns: minmax(220px, .8fr) minmax(0, 1.2fr); }
  .product-media { min-height: 320px; }
  .product-hero-grid, .product-story-grid { gap: 40px; }
  .product-hero-story .product-detail-media { min-height: 0; }
  .product-resource-grid { grid-template-columns: 1fr; }
  .document-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .article-index .article-card { grid-template-columns: minmax(260px, .8fr) minmax(0, 1.2fr); gap: 32px; }
  .footer-grid { grid-template-columns: minmax(0, 1fr) minmax(180px, .7fr) minmax(160px, .6fr); gap: 36px; }
}

@media (max-width: 760px) {
  :root { --shell: min(100% - 28px, 680px); }
  .header-inner { min-height: 66px; }
  .brand img { width: 128px; }
  .menu-toggle { display: block; }
  .site-nav { position: fixed; top: 66px; right: 0; left: 0; height: calc(100svh - 66px); display: none; flex-direction: column; align-items: stretch; gap: 0; padding: 16px 22px 28px; overflow-y: auto; background: var(--brand-ice); border-bottom: 1px solid var(--line); box-shadow: 0 18px 26px rgba(16, 60, 105, .12); }
  .site-nav.open { display: flex; }
  .site-nav a { padding: 17px 8px; border-bottom: 1px solid var(--line); font-size: 18px; }
  .site-nav a::after { display: none; }
  .menu-toggle[aria-expanded="true"] > span:nth-child(1) { transform: translateY(6px) rotate(45deg); }
  .menu-toggle[aria-expanded="true"] > span:nth-child(2) { opacity: 0; }
  .menu-toggle[aria-expanded="true"] > span:nth-child(3) { transform: translateY(-6px) rotate(-45deg); }
  h1 { font-size: 40px; }
  h2 { font-size: 32px; }
  .hero-inner { grid-template-columns: 1fr; gap: 26px; min-height: 0; padding-block: 40px 24px; }
  .hero-copy { padding-block: 0; }
  .hero-wordmark { display: none; }
  .hero-copy h1 { margin-bottom: 16px; font-size: 34px; }
  .hero-summary { font-size: 15px; line-height: 1.7; }
  .hero-actions { margin: 24px 0 0; }
  .hero-actions .button { flex: 1 1 150px; }
  .hero-facts { display: none; }
  .proof-grid { grid-template-columns: 1fr; }
  .proof-grid > div, .proof-grid > div:last-child { padding: 17px 0; border: 0; border-bottom: 1px solid rgba(255, 255, 255, .15); }
  .band { padding-block: 52px; }
  .product-grid, .article-grid, .document-grid { grid-template-columns: 1fr; }
  .product-card { grid-template-columns: 1fr; }
  .product-media { min-height: 0; aspect-ratio: 4 / 3; }
  .product-card h3, .article-card h3 { min-height: 0; }
  .article-index .article-card { grid-template-columns: 1fr; gap: 0; padding-block: 0 38px; border-top: 0; }
  .article-index .article-card + .article-card { padding-top: 38px; border-top: 1px solid var(--line); }
  .article-index .article-card-media { margin-bottom: 22px; }
  .article-index .article-card-copy { padding: 0; }
  .article-index .article-card h3 { font-size: 24px; }
  .article-index .article-card:last-child { border-bottom: 0; }
  .split-heading { display: block; }
  .section-heading-split { grid-template-columns: 1fr; gap: 20px; }
  .faq-preview-grid { grid-template-columns: 1fr; gap: 0; }
  .fact-layout { grid-template-columns: 1fr; gap: 26px; }
  .about-stat-grid, .principle-grid { grid-template-columns: 1fr; }
  .about-stat, .about-stat:last-child, .principle-grid article, .principle-grid article:last-child { padding-inline: 0; border-right: 0; border-left: 0; border-bottom: 1px solid var(--line); }
  .about-stat:last-child, .principle-grid article:last-child { border-bottom: 0; }
  .page-hero { padding-block: 54px 42px; }
  .page-hero .shell { padding-left: 18px; }
  .page-hero h1 { font-size: 40px; }
  .page-hero p:last-child { font-size: 16px; }
  .product-index-band .section-heading { padding-left: 21px; }
  .product-hero-grid { grid-template-columns: 1fr; gap: 32px; }
  .product-detail-media { padding: 22px; }
  .product-gallery-thumbnails { grid-template-columns: repeat(auto-fit, 72px); }
  .product-hero-story .product-detail-media { min-height: 0; }
  .product-quick-points { grid-template-columns: 1fr; padding: 0; }
  .product-quick-points li { padding: 10px 0; text-align: left; }
  .product-quick-points li + li { border-top: 1px solid var(--line); border-left: 0; }
  .product-highlight-grid { grid-template-columns: 1fr; }
  .product-highlight-grid > div, .product-highlight-grid > div:last-child { padding: 17px 0; border-right: 0; border-left: 0; border-bottom: 1px solid rgba(255, 255, 255, .18); }
  .product-highlight-grid > div:last-child { border-bottom: 0; }
  .product-intro h1 { font-size: 31px; }
  .product-story-band { padding-block: 54px; }
  .product-story-grid, .product-technical-facts, .product-use-grid, .product-specifications, .product-faq-layout, .faq-group { grid-template-columns: 1fr; gap: 32px; }
  .product-story-heading { margin-bottom: 32px; }
  .product-story-media { min-height: 0; padding: 24px; }
  .product-story-media img { height: auto; aspect-ratio: 4 / 3; }
  .product-feature-list h3 { font-size: 23px; }
  .product-technical-facts { margin-top: 48px; padding-block: 32px; }
  .product-technical-facts dl { grid-template-columns: 1fr; }
  .product-technical-facts dl > div { padding: 14px 0; border-top: 1px solid var(--line); border-left: 0; }
  .product-use-grid { margin-top: 58px; padding-top: 42px; }
  .product-use-steps { grid-template-columns: 1fr; }
  .product-use-steps li, .product-use-steps li:first-child { padding: 20px 0; }
  .product-use-steps li + li { border-top: 1px solid var(--line); border-left: 0; }
  .product-specifications { margin-top: 48px; padding-top: 36px; }
  .product-specifications ul { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .product-resource-grid { grid-template-columns: 1fr; }
  .product-resource { grid-template-columns: 130px minmax(0, 1fr); }
  .product-resource > a { height: 180px; }
  .product-resource > div { padding: 20px; }
  .product-chapter { grid-template-columns: 42px minmax(0, 1fr); gap: 10px 18px; }
  .product-chapter p { grid-column: 2; }
  .product-boundary-layout { grid-template-columns: 1fr; gap: 26px; }
  .registration-facts > div { grid-template-columns: 116px minmax(0, 1fr); }
  .related-product-grid { grid-template-columns: repeat(5, minmax(180px, 1fr)); gap: 12px; margin-inline: 0; padding-inline: 14px; overflow-x: auto; scroll-snap-type: x proximity; }
  .related-product-tile { scroll-snap-align: start; }
  .related-product-media { padding: 10px; }
  .related-product-copy { padding: 14px; }
  .related-product-copy strong { font-size: 15px; }
  .article-header h1 { font-size: 20px; }
  .article-header h1.is-long { font-size: 16px; }
  .article-header h1.is-very-long { font-size: 14px; }
  .article-cover { aspect-ratio: 4 / 3; margin-bottom: 42px; }
  .article-cover img { padding: 22px; }
  .article-body { font-size: 16px; }
  .article-pagination { grid-template-columns: 1fr; gap: 0; margin-top: 52px; }
  .article-pagination-link { padding-block: 18px; }
  .article-pagination-link.next { grid-column: 1; border-top: 1px solid var(--line); text-align: left; }
  .registration-table thead { display: none; }
  .registration-table, .registration-table tbody, .registration-table tr, .registration-table th, .registration-table td { display: block; width: 100%; }
  .registration-table tbody { display: grid; gap: 14px; }
  .registration-table tr { padding: 18px; border: 1px solid var(--line); background: var(--paper); }
  .registration-table tbody th { min-width: 0; padding: 0 0 14px; border-bottom: 1px solid var(--line); }
  .registration-table td { display: grid; grid-template-columns: 88px minmax(0, 1fr); gap: 12px; padding: 10px 0; font-size: 14px; }
  .registration-table td::before { content: attr(data-label); color: var(--muted); }
  .footer-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 36px 24px; padding-block: 46px; }
  .footer-grid > div:first-child { grid-column: 1 / -1; }
}

@media (max-width: 420px) {
  .hero-actions .button { flex-basis: 100%; }
  .registration-facts > div { grid-template-columns: 1fr; gap: 3px; }
  .document-copy { padding: 18px; }
  .product-resource { grid-template-columns: 1fr; }
  .product-resource > a { width: 100%; height: 210px; }
}

@media (max-width: 400px) {
  .article-header h1 { font-size: 15px; }
  .article-header h1.is-long { font-size: 13px; }
  .article-header h1.is-very-long { font-size: 10px; }
}

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