/* V3.44: shared reading scale, compact spacing and localized buying guides. */
:root { --sans: Arial, "Helvetica Neue", "Microsoft YaHei", "Noto Sans", sans-serif; --content-gutter: max(24px, calc((100vw - 1120px) / 2)); }
html { scroll-padding-top: 114px; }
body { font-size: 16px; line-height: 1.6; }
.reveal { opacity: 1; transform: none; transition: none; }
.top-contact { height: 32px; padding-inline: var(--content-gutter); font-size: 12px; gap: 20px; }
.nav-shell { height: 108px; padding-inline: var(--content-gutter); grid-template-columns: minmax(0,1fr) 84px minmax(0,1fr); }
.site-header.sticky .nav-shell { height: 100px; }
.nav-left, .nav-right { height: 64px; gap: clamp(12px,1.5vw,24px); }
.nav-left a, .nav-right a { padding-block: 22px; font-size: 14px; line-height: 1.2; }
.logo { width: 76px; height: 76px; }
.site-header.sticky .logo { width: 68px; height: 68px; }
.lang-switch { right: var(--content-gutter); bottom: 7px; gap: 5px; }
.lang-switch [data-lang] { width: 32px; min-height: 28px; }
.hero { min-height: min(700px, 82svh); padding: 160px 24px 56px; }
.hero .hero-content { width: min(900px,100%); padding-top: 0; }
.hero-kicker { font-size: 13px; margin-bottom: 18px; letter-spacing: .6px; }
html[lang] .hero h1 :is(span,b) { font-size: clamp(32px,3.6vw,48px); line-height: 1.18; letter-spacing: .015em; white-space: normal; }
.hero-copy { max-width: 660px; font: 16px/1.65 var(--sans); margin: 20px auto 24px; }
.hero-actions { gap: 12px; }
.outline-button, .solid-button { min-height: 46px; font-size: 14px; gap: 18px; }
.hero-index { font-size: 12px; bottom: 25px; }
.hero-proof { margin-top: 26px; }
.hero-proof div { min-height: 68px; padding: 12px 16px; }
.hero-proof strong { font-size: 22px; }
.hero-proof span { font-size: 12px; margin-top: 5px; }
.section { padding: 64px var(--content-gutter); }
.section-label { margin-bottom: 26px; gap: 10px; }
.section-label span, .section-label b { font-size: 13px; }
.section-heading { grid-template-columns: minmax(0,1fr) minmax(0,.9fr); gap: 32px; margin-bottom: 28px; }
html[lang] :is(.section h2,.capacity-copy h2,.quote-banner h2,.contact-title h2) { font-size: 30px; line-height: 1.25; letter-spacing: 0; }
html[lang] :is(.section h2,.capacity-copy h2,.quote-banner h2,.contact-title h2) :is(span,b) { font-size: clamp(26px,2.6vw,36px); line-height: 1.25; letter-spacing: 0; white-space: normal; }
.section-heading > p, .editorial-title p, .capacity-copy > p, .quality-intro p { font: 16px/1.7 var(--sans); }
.editorial-title p { max-width: 58ch; }
.company-grid { gap: 32px 48px; }
.editorial-title h2 { margin-bottom: 20px; }
.company-image img { height: 400px; }
.company-image figcaption, .company-quote cite { font-size: 12px; }
.company-quote { padding: 26px; margin-top: -60px; }
.company-quote p { font: 18px/1.65 var(--sans); margin-bottom: 15px; }
.text-link { font-size: 13px; margin-top: 10px; }
.metric-row { margin-top: 36px; }
.metric-row div { min-height: 100px; padding: 20px; }
.metric-row strong { font-size: 32px; }
.metric-row span { font-size: 13px; margin-top: 6px; }
.product-row { min-height: 100px; grid-template-columns: 44px minmax(0,1.1fr) minmax(0,1fr) 36px; gap: 20px; }
.product-row .number { font-size: 14px; }
.product-row h3 { font-size: clamp(20px,1.8vw,25px); }
.product-row p, .product-row small { font-size: 14px; line-height: 1.6; }
.application-card:nth-child(n), .reference-card:nth-child(n) { min-height: 280px; padding: 24px; }
.application-card h3, .reference-card h3 { font-size: 21px; }
.application-card small, .reference-card small { font-size: 13px; }
.application-card p, .reference-card p { font-size: 14px; }
.capacity-copy { padding: 32px; }
.quality-grid { gap: 42px; }
.quality-checklist strong { font-size: 17px; }
.quality-checklist em, .process-list span, .grade-table span { font-size: 15px; }
.process-list b { font-size: 14px; }
.grade-table b { font-size: 25px; }
.buying-facts div { min-height: 106px; padding: 20px; }
.buying-facts small { font-size: 12px; }
.buying-facts b { font-size: 17px; }
.service-grid article { min-height: 210px; padding: 22px; }
.service-grid h3 { font-size: 19px; margin: 34px 0 12px; }
.service-grid span, .service-grid p { font: 15px/1.65 var(--sans); }
.industry-card { padding: 24px; min-height: 240px; }
.industry-card small { font-size: 13px; }
.industry-card h3 { font-size: 20px; margin: 28px 0 12px; }
.industry-card p { font-size: 15px; }
.contact-section { padding: 64px var(--content-gutter); gap: 44px; grid-template-columns: minmax(0,.92fr) minmax(0,1.08fr); }
.contact-address { margin-top: 30px; }
.contact-address small { font-size: 12px; }
.contact-address b { font-size: 15px; line-height: 1.5; }
.quote-form { padding-top: 12px; min-width: 0; }
.form-intro { font-size: 15px; margin-bottom: 20px; padding-bottom: 16px; }
.form-row { gap: 16px; }
.quote-form label { margin-bottom: 16px; }
.quote-form label > span { font-size: 13px; margin-bottom: 5px; }
.quote-form :is(input,select,textarea) { font-size: 16px; padding-block: 10px; min-height: 44px; }
.footer-main p, .footer-main small, .footer-logo span { font-size: 14px; }
.footer-bottom { font-size: 12px; }
.modal-copy > p { font-size: 16px; }
.modal-copy h2 { font-size: 30px; }
.product-intro { padding: 165px var(--content-gutter) 48px; }
.product-intro-grid { max-width: 1120px; gap: 36px; }
.product-intro h1 { font-size: clamp(28px,3vw,42px); }
.product-lead { font-size: 17px; }
.product-info-grid { gap: 24px; }
/* Scoped cards also style the existing Vietnamese resource index. */
.link-grid { display: grid; grid-template-columns: repeat(3,minmax(0,1fr)); gap: 12px; }
.link-grid a { min-width: 0; min-height: 68px; display: flex; align-items: center; justify-content: space-between; gap: 12px; padding: 16px 18px; border: 1px solid #dce4df; border-radius: 8px; background: #fff; color: #123b2d; text-decoration: none; font-size: 15px; line-height: 1.5; overflow-wrap: anywhere; transition: border-color .15s, background .15s; }
.link-grid a:hover { background: #f0f5f1; border-color: #8aaa98; }
.link-grid a:focus-visible { outline: 3px solid #bd8c55; outline-offset: 3px; }
.link-grid a span[aria-hidden] { flex: 0 0 auto; color: #8a633b; }
[data-seo-growth] { border-top: 1px solid #d9e1db; }
[data-seo-growth] h2 { margin-bottom: 12px; }
[data-seo-growth] .seo-section-context { max-width: 64ch; color: #5e685f; font-size: 15px; line-height: 1.65; margin-bottom: 24px; }
.buying-guide-page .guide-header, .buying-guide-page main, .buying-guide-page footer { max-width: 1120px; margin: auto; padding: 28px 24px; }
.guide-header nav { display: flex; gap: 20px; align-items: center; flex-wrap: wrap; font-size: 14px; }
.guide-header h1 { font-size: clamp(26px,3vw,38px); line-height: 1.3; margin: 28px 0 12px; }
.guide-header > p { color: #5e685f; max-width: 65ch; margin: 0; }
.guide-language-links { display: flex; gap: 6px; flex-wrap: wrap; }
.guide-language-links a { min-height: 36px; padding: 7px 10px; border: 1px solid #dce4df; border-radius: 5px; text-decoration: none; }
.guide-language-links a[aria-current] { background: #123b2d; color: #fff; }
.guide-articles { margin-top: 32px; display: grid; grid-template-columns: repeat(2,minmax(0,1fr)); gap: 20px; }
.guide-articles article { background: #fff; border: 1px solid #dce4df; border-radius: 8px; padding: 24px; scroll-margin-top: 20px; }
.guide-articles h2 { font-size: 20px; margin: 0 0 12px; line-height: 1.4; }
.guide-articles p { margin: 0; font-size: 16px; line-height: 1.7; }
.guide-articles article:first-child { grid-column: 1/-1; }
.guide-cta { display: inline-flex; min-height: 44px; align-items: center; padding: 10px 18px; background: #123b2d; color: #fff; border-radius: 6px; text-decoration: none; }
@media (min-width: 821px) and (max-width: 1100px) {
 .nav-left a, .nav-right a { font-size: 12px; }
 .nav-left, .nav-right { gap: 12px; }
 .contact-section, .quality-grid { gap: 28px; }
}
@media (max-width: 820px) {
 :root { --content-gutter: 20px; }
 html { scroll-padding-top: 122px; }
 .top-contact, .site-header.sticky .top-contact { height: 28px; padding-inline: 12px; font-size: 11px; gap: 8px; }
 .nav-shell, .site-header.sticky .nav-shell { height: 84px; padding-inline: 12px; }
 .logo, .site-header.sticky .logo { width: 52px; height: 52px; }
 .lang-switch { left: 50%; right: auto; bottom: 4px; gap: 4px; }
 .lang-switch [data-lang] { min-height: 30px; width: 31px; flex-basis: 31px; }
 .nav-left { top: 84px; height: auto; max-height: calc(100dvh - 112px); overflow-y: auto; }
 .nav-left > a { font-size: 14px; padding: 9px 10px; min-height: 44px; }
 .nav-left.open { height: auto; }
 .hero { min-height: 0; padding: 146px 20px 66px; }
 .hero .hero-content { width: 100%; }
 html[lang] .hero h1 :is(span,b) { font-size: clamp(28px,6.7vw,36px); letter-spacing: 0; }
 .hero h1 { text-align: center; margin-inline: auto; }
 .hero-copy { font-size: 15px; margin-block: 18px 22px; }
 .hero-kicker { font-size: 12px; }
 .hero-proof { margin-top: 22px; }
 .hero-proof div { min-height: 62px; padding: 10px; }
 .hero-proof strong { font-size: 20px; }
 .hero-proof span { font-size: 11px; }
 .hero-index { bottom: 22px; font-size: 11px; }
 .section { padding-block: 42px; }
 .section-label { margin-bottom: 18px; }
 .section-heading { display: block; margin-bottom: 24px; }
 .section-heading > p { margin-top: 14px; }
 html[lang] :is(.section h2,.capacity-copy h2,.quote-banner h2,.contact-title h2) { font-size: 26px; }
 html[lang] :is(.section h2,.capacity-copy h2,.quote-banner h2,.contact-title h2) :is(span,b) { font-size: clamp(24px,5.5vw,30px); line-height: 1.3; }
 .section-heading > p, .editorial-title p, .capacity-copy > p, .quality-intro p { font-size: 15px; }
 .company-grid { gap: 24px; }
 .company-image img { height: 300px; }
 .company-quote { padding: 22px; margin: -34px 10px 0; }
 .company-quote p { font-size: 16px; }
 .metric-row { margin-top: 28px; }
 .metric-row div { padding: 16px; min-height: 92px; }
 .metric-row strong { font-size: 27px; }
 .metric-row span { font-size: 12px; }
 .product-row { min-height: 88px; grid-template-columns: 28px minmax(0,1fr) 28px; gap: 12px; }
 .product-row h3 { font-size: 21px; }
 .product-row .number { font-size: 13px; }
 .application-card:nth-child(n), .reference-card:nth-child(n) { min-height: 250px; }
 .capacity-photo { height: 280px; }
 .capacity-copy { padding: 28px 20px; }
 .quality-grid { gap: 26px; }
 .service-grid article { min-height: 180px; padding: 20px; }
 .buying-facts div { min-height: 92px; padding: 16px 12px; }
 .contact-section { grid-template-columns: minmax(0,1fr); padding-block: 42px; gap: 28px; }
 .contact-address { margin-top: 22px; }
 .quote-form { padding-top: 0; }
 .quote-form input, .quote-form select, .quote-form textarea { font-size: 16px; }
 .product-intro { padding-top: 140px; }
 .product-intro h1 { font-size: 30px; }
 .product-lead { font-size: 16px; }
 .link-grid { grid-template-columns: repeat(2,minmax(0,1fr)); gap: 10px; }
 .link-grid a { font-size: 14px; min-height: 64px; padding: 14px; }
 .mobile-cta a { min-height: 44px; font-size: 13px; }
 .floating-video { width: 96px; right: 14px; }
 .floating-video-close { width: 40px; height: 40px; font-size: 26px; }
 .buying-guide-page .guide-header, .buying-guide-page main, .buying-guide-page footer { padding: 22px 20px; }
 .guide-articles { gap: 14px; }
 .guide-articles article { padding: 20px; }
}
@media (max-width: 600px) {
 .link-grid, .guide-articles, .industry-grid, .service-grid { grid-template-columns: minmax(0,1fr); }
 .application-grid, .reference-mosaic { grid-template-columns: minmax(0,1fr); }
 .application-card:nth-child(n), .reference-card:nth-child(n) { grid-column: auto; min-height: 240px; }
 .industry-card { min-height: 0; padding: 22px; }
 .industry-card h3 { margin-top: 18px; }
 .service-grid article:nth-child(n) { border-right: 0; border-bottom: 1px solid var(--line); padding: 20px; min-height: 0; }
 .service-grid article:last-child { border-bottom: 0; }
 .service-grid h3 { margin-top: 18px; }
 .company-image img { height: 250px; }
 .guide-articles article:first-child { grid-column: auto; }
 .guide-articles h2 { font-size: 19px; }
}
@media (max-width: 480px) {
 .form-row { grid-template-columns: minmax(0,1fr); gap: 0; }
 .hero-actions { flex-direction: column; align-items: stretch; }
 .hero-actions > a { width: 100%; justify-content: center; }
 .top-contact-name { display: none; }
 .top-contact { flex-wrap: nowrap; }
 .floating-video { width: 84px; }
}