:root {
  --ink: #102538;
  --muted: #557084;
  --blue: #0069c8;
  --blue-dark: #004a94;
  --blue-pale: #e9f4ff;
  --orange: #f57c00;
  --orange-dark: #c85f00;
  --paper: #ffffff;
  --wash: #f4f8fb;
  --line: #d6e2ea;
  --success: #08783e;
  --shadow: 0 18px 50px rgba(16, 37, 56, .12);
  --radius: 22px;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  color: var(--ink);
  background: var(--paper);
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", Arial, sans-serif;
  font-size: 16px;
  line-height: 1.65;
  text-rendering: optimizeLegibility;
  overflow-wrap: break-word;
  -webkit-text-size-adjust: 100%;
}
img { display: block; max-width: 100%; height: auto; }
p { text-wrap: pretty; }
a { color: inherit; }
button, input, textarea { font: inherit; }
.container { width: min(1160px, calc(100% - 40px)); margin-inline: auto; }
.skip-link { position: fixed; left: 16px; top: -80px; z-index: 999; padding: 12px 16px; background: var(--ink); color: white; border-radius: 8px; }
.skip-link:focus { top: 16px; }

.topline { background: var(--ink); color: #dceaf4; font-size: .9rem; }
.topline .container { display: flex; justify-content: space-between; gap: 18px; padding: 7px 0; }
.topline a { color: white; font-weight: 800; text-decoration: none; }
.site-header { position: sticky; top: 0; z-index: 50; background: rgba(255,255,255,.96); border-bottom: 1px solid var(--line); backdrop-filter: blur(14px); }
.nav { min-height: 74px; display: flex; align-items: center; justify-content: space-between; gap: 24px; }
.brand { display: inline-flex; align-items: center; gap: 12px; text-decoration: none; font-weight: 950; line-height: 1.05; letter-spacing: -.02em; }
.brand-mark { display: grid; place-items: center; flex: 0 0 auto; width: 58px; aspect-ratio: 1; overflow: hidden; border: 1px solid #dbeeff; border-radius: 50%; background: white; box-shadow: 0 8px 22px rgba(0,105,200,.14); }
.brand-mark img { width: 100%; height: 100%; object-fit: contain; }
.brand small { display: block; margin-top: 4px; color: var(--muted); font-size: .72rem; font-weight: 750; letter-spacing: .06em; }
.nav-links { display: flex; align-items: center; gap: 24px; }
.nav-links a { font-size: .94rem; font-weight: 750; text-decoration: none; }
.nav-links a:hover, .nav-links a[aria-current="page"] { color: var(--blue); }
.nav-call { padding: 11px 16px; border-radius: 999px; background: var(--orange); color: white !important; box-shadow: 0 8px 20px rgba(245,124,0,.25); }
.menu-button { display: none; width: 44px; height: 44px; border: 1px solid var(--line); border-radius: 12px; background: white; color: var(--ink); font-size: 1.35rem; cursor: pointer; }

.hero { overflow: hidden; background: radial-gradient(circle at 80% 20%, #d8efff 0, rgba(216,239,255,0) 36%), linear-gradient(180deg, #f8fcff 0%, #fff 100%); }
.hero-grid { display: grid; grid-template-columns: 1.05fr .95fr; align-items: center; gap: 58px; min-height: 650px; padding: 72px 0 62px; }
.eyebrow { display: inline-flex; align-items: center; gap: 9px; margin: 0 0 18px; color: var(--blue-dark); font-size: .78rem; font-weight: 900; letter-spacing: .12em; text-transform: uppercase; }
.eyebrow::before { content: ""; width: 28px; height: 3px; border-radius: 99px; background: var(--orange); }
h1, h2, h3 { margin: 0; line-height: 1.14; letter-spacing: -.035em; text-wrap: balance; }
h1 { max-width: 760px; font-size: clamp(2.55rem, 5.1vw, 4.7rem); }
h1 .accent { color: var(--blue); }
.hero-lede { max-width: 650px; margin: 24px 0 0; color: var(--muted); font-size: clamp(1.06rem, 2vw, 1.22rem); }
.actions { display: flex; flex-wrap: wrap; gap: 12px; margin-top: 30px; }
.button { display: inline-flex; align-items: center; justify-content: center; gap: 9px; min-height: 50px; padding: 0 20px; border: 2px solid transparent; border-radius: 13px; font-weight: 900; text-decoration: none; transition: transform .18s ease, box-shadow .18s ease, background .18s ease; }
.button:hover { transform: translateY(-2px); }
.button-primary { background: var(--orange); color: white; box-shadow: 0 12px 26px rgba(245,124,0,.26); }
.button-primary:hover { background: var(--orange-dark); }
.button-secondary { border-color: var(--blue); color: var(--blue-dark); background: white; }
.hero-notes { display: flex; flex-wrap: wrap; gap: 14px 22px; margin: 25px 0 0; padding: 0; list-style: none; color: #35556d; font-size: .94rem; font-weight: 750; }
.hero-notes li::before { content: "✓"; margin-right: 7px; color: var(--success); font-weight: 950; }
.product-stage { position: relative; padding: 28px 22px 10px; }
.product-stage::before { content: ""; position: absolute; inset: 13% 3% 4%; border-radius: 42% 58% 48% 52%; background: linear-gradient(145deg, #d7edff, #f2f8fc); transform: rotate(-4deg); }
.product-stage img { position: relative; width: 100%; border-radius: 20px; filter: drop-shadow(0 26px 30px rgba(0,54,98,.18)); }
.floating-spec { position: absolute; z-index: 2; right: 0; bottom: 18px; max-width: 210px; padding: 16px 18px; border: 1px solid rgba(255,255,255,.85); border-radius: 16px; background: rgba(255,255,255,.92); box-shadow: var(--shadow); backdrop-filter: blur(8px); }
.floating-spec strong { display: block; color: var(--blue-dark); font-size: 1.35rem; }
.floating-spec span { color: var(--muted); font-size: .84rem; }

.factbar { border-block: 1px solid var(--line); background: var(--wash); }
.facts { display: grid; grid-template-columns: repeat(4, 1fr); }
.fact { padding: 24px; border-right: 1px solid var(--line); }
.fact:first-child { border-left: 1px solid var(--line); }
.fact strong { display: block; color: var(--blue-dark); font-size: 1.12rem; }
.fact span { display: block; margin-top: 4px; color: var(--muted); font-size: .88rem; }

.section { padding: 94px 0; }
.section-muted { background: var(--wash); }
.section-dark { background: var(--ink); color: white; }
.section-head { display: grid; grid-template-columns: .85fr 1.15fr; gap: 70px; align-items: end; margin-bottom: 40px; }
.hero-grid > *, .feature-split > *, .spec-panel > *, .proof-grid > *, .section-head > * { min-width: 0; }
.section-head h2 { font-size: clamp(2rem, 4vw, 3.2rem); }
.section-head p { margin: 0; color: var(--muted); font-size: 1.05rem; }
.section-dark .section-head p { color: #b9cad6; }
.answer-box { padding: 26px 30px; border-left: 5px solid var(--orange); border-radius: 0 18px 18px 0; background: var(--blue-pale); }
.answer-box p { margin: 0; font-size: 1.12rem; }
.answer-box p + p { margin-top: 12px; }
.comparison-panel { margin: 0 0 38px; padding: 30px; border: 1px solid var(--line); border-radius: var(--radius); background: var(--wash); box-shadow: 0 8px 28px rgba(16,37,56,.06); }
.comparison-panel h3 { max-width: 900px; font-size: clamp(1.55rem, 3vw, 2.25rem); }
.comparison-lede { max-width: 920px; margin: 14px 0 24px; color: var(--muted); }
.comparison-lede strong { color: var(--ink); }
.comparison-table-home { width: 100%; border-collapse: collapse; background: white; }
.comparison-table-home th, .comparison-table-home td { padding: 15px 16px; border: 1px solid var(--line); text-align: left; vertical-align: top; }
.comparison-table-home th { background: var(--blue-dark); color: white; }
.comparison-table-home th:first-child { width: 20%; }
.comparison-table-home td:first-child { color: var(--ink); font-weight: 850; }
.comparison-table-home td { color: var(--muted); }

.card-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; }
.card { display: flex; flex-direction: column; min-height: 100%; padding: 26px; border: 1px solid var(--line); border-radius: var(--radius); background: white; box-shadow: 0 8px 28px rgba(16,37,56,.06); }
.card-icon { display: grid; place-items: center; width: 48px; height: 48px; margin-bottom: 22px; border-radius: 14px; background: var(--blue-pale); color: var(--blue); font-size: 1.35rem; font-weight: 950; }
.card h3 { font-size: 1.3rem; }
.card p { margin: 12px 0 20px; color: var(--muted); }
.card a { margin-top: auto; color: var(--blue-dark); font-weight: 900; text-decoration-thickness: 2px; text-underline-offset: 4px; }

.feature-split { display: grid; grid-template-columns: 1fr 1fr; align-items: center; gap: 68px; }
.feature-media { overflow: hidden; border-radius: 26px; background: #eef4f7; box-shadow: var(--shadow); }
.feature-media img { width: 100%; aspect-ratio: 4 / 3; object-fit: cover; background: white; }
.feature-copy h2 { font-size: clamp(2rem, 4vw, 3.15rem); }
.feature-copy > p { color: var(--muted); }
.check-list { display: grid; gap: 16px; margin: 28px 0 0; padding: 0; list-style: none; }
.check-list li { display: grid; grid-template-columns: 30px 1fr; gap: 12px; }
.check-list li::before { content: "✓"; display: grid; place-items: center; width: 28px; height: 28px; border-radius: 50%; background: #e5f7ed; color: var(--success); font-weight: 950; }
.check-list strong { display: block; }
.check-list span { color: var(--muted); font-size: .94rem; }

.spec-panel { display: grid; grid-template-columns: 1.05fr .95fr; gap: 32px; align-items: stretch; }
.spec-visual { display: flex; flex-direction: column; align-items: center; justify-content: center; gap: 12px; margin: 0; padding: 30px; border-radius: 26px; background: linear-gradient(145deg, #f8fbfd, #e8f2f8); }
.spec-visual img { width: 100%; height: min(620px, 100%); object-fit: cover; object-position: center; border-radius: 18px; }
.spec-visual figcaption { width: 100%; color: var(--muted); font-size: .86rem; line-height: 1.55; text-align: left; }
.spec-content { padding: 34px; border-radius: 26px; background: white; color: var(--ink); }
.spec-content h2 { font-size: 2.1rem; }
.spec-table { width: 100%; margin-top: 22px; border-collapse: collapse; }
.spec-table th, .spec-table td { padding: 13px 0; border-bottom: 1px solid var(--line); text-align: left; vertical-align: top; }
.spec-table th { width: 45%; color: var(--muted); font-weight: 700; }
.spec-table td { font-weight: 850; }
.fineprint { color: var(--muted); font-size: .86rem; }

.proof-grid { display: grid; grid-template-columns: 1.15fr .85fr; gap: 22px; }
.proof-image { overflow: hidden; min-height: 460px; border-radius: 26px; }
.proof-image img { width: 100%; height: 100%; object-fit: cover; }
.proof-copy { display: flex; flex-direction: column; justify-content: center; padding: 42px; border-radius: 26px; background: var(--blue); color: white; }
.proof-copy h2 { font-size: clamp(2rem, 4vw, 3rem); }
.proof-copy p { color: #dceeff; }
.proof-points { display: grid; gap: 14px; margin-top: 16px; }
.proof-point { padding-top: 14px; border-top: 1px solid rgba(255,255,255,.22); }
.proof-point strong { display: block; }
.proof-point span { color: #dceeff; font-size: .91rem; }

.steps { display: grid; grid-template-columns: repeat(4, 1fr); gap: 18px; counter-reset: step; }
.step { counter-increment: step; padding: 24px; border-top: 4px solid var(--blue); border-radius: 0 0 18px 18px; background: white; }
.step::before { content: "0" counter(step); display: block; margin-bottom: 22px; color: var(--orange); font-size: 1.65rem; font-weight: 950; }
.step h3 { font-size: 1.1rem; }
.step p { margin-bottom: 0; color: var(--muted); font-size: .92rem; }

.faq { width: min(900px, calc(100% - 40px)); margin: 0 auto; }
.faq h2 { margin-bottom: 28px; font-size: clamp(2rem, 4vw, 3rem); }
details { border-top: 1px solid var(--line); }
details:last-child { border-bottom: 1px solid var(--line); }
summary { position: relative; padding: 22px 44px 22px 0; cursor: pointer; font-size: 1.06rem; font-weight: 850; list-style: none; }
summary::-webkit-details-marker { display: none; }
summary::after { content: "+"; position: absolute; right: 8px; top: 18px; color: var(--blue); font-size: 1.45rem; }
details[open] summary::after { content: "–"; }
details p { max-width: 780px; margin: -5px 0 22px; color: var(--muted); }

.cta-band { padding: 62px 0; background: linear-gradient(115deg, var(--blue-dark), var(--blue)); color: white; }
.cta-grid { display: flex; align-items: center; justify-content: space-between; gap: 32px; }
.cta-grid h2 { font-size: clamp(1.9rem, 4vw, 3rem); }
.cta-grid p { margin: 10px 0 0; color: #dceeff; }
.cta-grid .button { flex: 0 0 auto; background: white; color: var(--blue-dark); }

.breadcrumbs { padding: 18px 0; color: var(--muted); font-size: .86rem; }
.breadcrumbs ol { display: flex; flex-wrap: wrap; gap: 8px; margin: 0; padding: 0; list-style: none; }
.breadcrumbs li:not(:last-child)::after { content: "/"; margin-left: 8px; color: #9aabb7; }
.page-hero { padding: 62px 0 72px; background: linear-gradient(180deg, #eef7ff, white); }
.page-hero .container { display: grid; grid-template-columns: 1fr .72fr; gap: 50px; align-items: center; }
.page-hero h1 { font-size: clamp(2.45rem, 5vw, 4.2rem); }
.page-hero p { color: var(--muted); font-size: 1.12rem; }
.article { display: grid; grid-template-columns: 250px minmax(0, 760px); gap: 60px; justify-content: center; }
.toc { position: sticky; top: 110px; align-self: start; padding: 22px; border: 1px solid var(--line); border-radius: 16px; background: var(--wash); }
.toc strong { display: block; margin-bottom: 10px; }
.toc a { display: block; padding: 6px 0; color: var(--muted); font-size: .9rem; text-decoration: none; }
.toc a:hover { color: var(--blue); }
.prose h2 { margin: 48px 0 16px; font-size: 2rem; scroll-margin-top: 110px; }
.prose h2:first-child { margin-top: 0; }
.prose h3 { margin: 28px 0 12px; font-size: 1.3rem; }
.prose p, .prose li { color: #35556d; }
.prose table { width: 100%; margin: 24px 0; border-collapse: collapse; }
.prose th, .prose td { padding: 13px; border: 1px solid var(--line); text-align: left; vertical-align: top; }
.prose th { background: var(--wash); color: var(--ink); }
.prose .callout { margin: 26px 0; padding: 22px 24px; border-radius: 16px; background: var(--blue-pale); color: var(--ink); }
.prose .callout-warning { border-left: 5px solid var(--orange); background: #fff4e8; }
.article-faq { margin: 18px 0 42px; }
.article-faq details { padding: 0 18px; border: 1px solid var(--line); border-bottom: 0; background: white; }
.article-faq details:first-child { border-radius: 16px 16px 0 0; }
.article-faq details:last-child { border-bottom: 1px solid var(--line); border-radius: 0 0 16px 16px; }
.article-faq details p { margin-top: 0; }
.role-list li { margin-bottom: 10px; }
.video-showcase { margin: 24px 0 36px; }
.video-showcase--short { max-width: 390px; }
.video-grid { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 22px; margin: 24px 0 36px; align-items: start; }
.video-card { overflow: hidden; border: 1px solid var(--line); border-radius: 20px; background: white; box-shadow: 0 12px 34px rgba(16,37,56,.09); }
.video-card h3 { padding: 18px 20px 0; font-size: 1.15rem; }
.video-frame { position: relative; width: 100%; aspect-ratio: 16 / 9; overflow: hidden; background: #07131d; }
.video-frame--short { aspect-ratio: 9 / 16; }
.video-frame iframe { position: absolute; inset: 0; width: 100%; height: 100%; border: 0; }
.video-load { position: absolute; inset: 0; width: 100%; height: 100%; padding: 0; overflow: hidden; border: 0; background: #07131d; cursor: pointer; }
.video-load img { width: 100%; height: 100%; object-fit: cover; opacity: .88; transition: transform .2s ease, opacity .2s ease; }
.video-load:hover img, .video-load:focus-visible img { opacity: 1; transform: scale(1.02); }
.video-load:focus-visible { outline: 4px solid #ff8a00; outline-offset: -4px; }
.video-play { position: absolute; left: 50%; top: 50%; display: grid; width: 64px; height: 48px; place-items: center; border-radius: 14px; background: rgba(226, 36, 28, .96); color: white; box-shadow: 0 9px 24px rgba(0,0,0,.3); font-size: 1.35rem; transform: translate(-50%, -50%); }
.video-grid-single { grid-template-columns: minmax(0, 640px); }
.additional-videos { margin: -10px 0 34px; padding: 18px 20px; border: 1px solid var(--line); border-radius: 14px; background: var(--wash); }
.additional-videos ul { display: grid; gap: 9px; margin: 10px 0 0; padding-left: 20px; }
.additional-videos a { color: var(--blue-dark); font-weight: 750; text-underline-offset: 3px; }
.additional-videos .playlist-link { display: inline-flex; width: 100%; min-height: 48px; align-items: center; justify-content: center; margin-top: 18px; padding: 12px 18px; border-radius: 10px; background: var(--blue); color: white; text-align: center; text-decoration: none; }
.additional-videos .playlist-link:hover { background: var(--blue-dark); color: white; }
.video-caption { margin: 0; padding: 14px 18px 18px; color: var(--muted); font-size: .92rem; }
.comparison-table th:first-child { width: 24%; }
.comparison-table .highlight-row td { border-color: #f4a340; background: #fff4e8; color: var(--ink); font-weight: 850; }
.criteria-list { display: grid; gap: 14px; margin: 24px 0 30px; padding: 0; list-style: none; counter-reset: criterion; }
.criteria-list > li { position: relative; min-width: 0; padding: 24px 24px 22px 74px; border: 1px solid var(--line); border-radius: 16px; background: white; counter-increment: criterion; }
.criteria-list > li::before { content: counter(criterion); position: absolute; top: 22px; left: 22px; display: grid; width: 36px; height: 36px; place-items: center; border-radius: 50%; background: var(--blue); color: white; font-weight: 950; }
.criteria-list h3 { margin: 0 0 8px; color: var(--ink); }
.criteria-list p { margin: 0; }

.site-footer { padding: 58px 0 92px; background: #0a1a28; color: #b9cad6; }
.footer-grid { display: grid; grid-template-columns: 1.2fr .8fr .9fr; gap: 48px; }
.site-footer h2, .site-footer h3 { color: white; }
.site-footer h2 { font-size: 1.35rem; }
.site-footer h3 { font-size: 1rem; }
.site-footer a { color: #e7f4ff; }
.footer-links { display: grid; gap: 8px; }
.footer-links a { text-decoration: none; }
.footer-contact-links { display: grid; gap: 10px; margin-top: 14px; }
.footer-contact-link { display: inline-flex; align-items: center; width: fit-content; min-height: 42px; padding: 8px 13px; border: 1px solid rgba(255,255,255,.2); border-radius: 11px; background: rgba(255,255,255,.06); font-weight: 800; text-decoration: none; }
.footer-contact-link:hover { border-color: rgba(255,255,255,.48); background: rgba(255,255,255,.11); }
.footer-fanpage { grid-column: 1 / 2; min-width: 0; margin-top: 8px; }
.footer-fanpage p { max-width: 430px; margin: 0 0 14px; }
.footer-fanpage-frame { display: block; max-width: 100%; overflow: hidden; border: 0; border-radius: 16px; background: white; }
.footer-fanpage-link { display: inline-flex; margin-top: 10px; font-weight: 800; text-underline-offset: 4px; }
.footer-map { grid-column: 2 / -1; margin-top: 8px; }
.footer-map h3 { margin-bottom: 14px; }
.footer-map iframe { width: 100%; height: 430px; border: 0; border-radius: 18px; background: #dfe9ef; }
.footer-map-link { display: inline-flex; margin-top: 10px; font-weight: 800; text-underline-offset: 4px; }
.copyright { margin-top: 40px; padding-top: 22px; border-top: 1px solid rgba(255,255,255,.12); font-size: .86rem; }
.mobile-cta { display: none; }
.floating-zalo { position: fixed; z-index: 70; right: 20px; bottom: 22px; display: grid; place-items: center; width: 64px; height: 64px; border: 3px solid white; border-radius: 50%; background: #0877e8; color: white; box-shadow: 0 10px 28px rgba(0,74,160,.38); font-size: .92rem; font-weight: 950; letter-spacing: -.04em; text-decoration: none; transition: transform .2s ease, box-shadow .2s ease; }
.floating-zalo::after { content: ''; position: absolute; right: 2px; bottom: 1px; width: 14px; height: 14px; border-right: 3px solid white; border-bottom: 3px solid white; border-radius: 0 0 12px 0; background: #0877e8; transform: rotate(28deg); }
.floating-zalo span { position: relative; z-index: 1; }
.floating-zalo:hover, .floating-zalo:focus-visible { color: white; transform: translateY(-3px) scale(1.04); box-shadow: 0 14px 34px rgba(0,74,160,.46); }
.floating-zalo:focus-visible { outline: 3px solid #ff8a00; outline-offset: 3px; }
.content-meta { margin: 0 0 18px; color: var(--muted); font-size: .86rem; font-weight: 700; }

@media (max-width: 900px) {
  .menu-button { display: inline-grid; place-items: center; }
  .nav-links { display: none; position: absolute; inset: 74px 20px auto; padding: 12px; border: 1px solid var(--line); border-radius: 16px; background: white; box-shadow: var(--shadow); }
  .nav-links.open { display: grid; }
  .nav-links a { display: flex; align-items: center; min-height: 46px; padding: 0 10px; border-radius: 10px; }
  .nav-links .nav-call { justify-content: center; margin-top: 4px; }
  .topline .container { justify-content: center; text-align: center; }
  .topline span:last-child { display: none; }
  .hero-grid, .page-hero .container, .feature-split, .spec-panel, .proof-grid, .section-head { grid-template-columns: 1fr; }
  .hero-grid { min-height: auto; padding: 54px 0 44px; gap: 22px; }
  .hero-copy { text-align: left; }
  .product-stage { max-width: 680px; margin: 0 auto; }
  .section-head { gap: 18px; }
  .facts, .steps { grid-template-columns: repeat(2, 1fr); }
  .card-grid { grid-template-columns: 1fr; }
  .article { grid-template-columns: 1fr; }
  .toc { position: static; }
  .video-grid { grid-template-columns: 1fr; }
  .video-grid .video-card:has(.video-frame--short) { max-width: 390px; }
  .footer-grid { grid-template-columns: 1fr 1fr; }
  .footer-fanpage, .footer-map { grid-column: 1 / -1; }
  .footer-map iframe { height: 270px; }
}

@media (max-width: 620px) {
  body { padding-bottom: calc(72px + env(safe-area-inset-bottom)); }
  main { overflow-x: clip; }
  .container { width: min(100% - 24px, 1160px); }
  .topline { font-size: .8rem; }
  .topline .container { padding: 5px 0; }
  .brand small { display: none; }
  .brand { gap: 9px; font-size: .98rem; }
  .brand-mark { width: 50px; }
  .nav { min-height: 62px; }
  .nav-links { inset: 62px 12px auto; }
  .hero-grid { display: flex; flex-direction: column; gap: 0; padding: 28px 0 34px; }
  .hero-copy { display: contents; }
  .hero-copy > .eyebrow { order: 1; margin-bottom: 10px; }
  .hero-copy > h1 { order: 2; }
  .hero-grid > .product-stage { order: 3; }
  .hero-copy > .hero-lede { order: 4; }
  .hero-copy > .actions { order: 5; }
  .hero-copy > .hero-notes { order: 6; }
  h1 { font-size: clamp(2.05rem, 10.5vw, 2.75rem); }
  .hero-lede { margin-top: 14px; font-size: 1rem; line-height: 1.58; }
  .product-stage { width: 100%; max-width: 520px; padding: 12px 0 0; }
  .product-stage img { border-radius: 16px; }
  .floating-spec { max-width: none; margin: -2px 0 0; padding: 10px 13px; border-radius: 12px; box-shadow: none; background: var(--blue-pale); }
  .floating-spec strong { display: inline; margin-right: 6px; font-size: 1rem; }
  .floating-spec span { font-size: .78rem; }
  .actions { display: grid; grid-template-columns: 1fr; width: 100%; gap: 9px; margin-top: 20px; }
  .button { width: 100%; min-height: 52px; padding: 0 16px; }
  .hero-notes { display: grid; grid-template-columns: 1fr 1fr; width: 100%; gap: 8px; margin-top: 16px; font-size: .82rem; }
  .hero-notes li { padding: 8px 9px; border: 1px solid var(--line); border-radius: 10px; background: white; }
  .hero-notes li:last-child { grid-column: 1 / -1; }
  .section { padding: 50px 0; }
  .section-head { margin-bottom: 28px; }
  .section-head h2, .feature-copy h2, .proof-copy h2, .faq h2, .cta-grid h2 { font-size: clamp(1.75rem, 8.5vw, 2.25rem); }
  .facts { grid-template-columns: 1fr 1fr; }
  .fact { padding: 18px 14px; }
  .fact:nth-child(odd) { border-left: 1px solid var(--line); }
  .fact:nth-child(n+3) { grid-column: 1 / -1; border-top: 1px solid var(--line); border-left: 1px solid var(--line); }
  .card { padding: 22px 20px; border-radius: 18px; }
  .steps, .footer-grid { grid-template-columns: 1fr; }
  .step { padding: 22px 20px; }
  .footer-map iframe { height: 230px; }
  .proof-image { min-height: 330px; }
  .proof-copy { padding: 30px 24px; }
  .feature-media, .proof-image, .proof-copy, .spec-visual, .spec-content { border-radius: 18px; }
  .spec-visual { padding: 16px; }
  .spec-visual img { height: auto; aspect-ratio: 4 / 5; }
  .spec-content { padding: 24px 20px; }
  .spec-content h2 { font-size: 1.8rem; }
  .spec-table tr { display: block; border-bottom: 1px solid var(--line); }
  .spec-table tr:last-child { border-bottom: 0; }
  .spec-table th, .spec-table td { display: block; width: 100%; border-bottom: 0; }
  .spec-table th { padding: 12px 0 2px; font-size: .82rem; letter-spacing: .035em; text-transform: uppercase; }
  .spec-table td { padding: 0 0 12px; }
  .answer-box { padding: 20px 18px; border-left-width: 4px; }
  .comparison-panel { padding: 22px 16px; }
  .comparison-table-home, .comparison-table-home tbody, .comparison-table-home tr, .comparison-table-home td { display: block; width: 100%; }
  .comparison-table-home thead { display: none; }
  .comparison-table-home tr { margin-top: 14px; overflow: hidden; border: 1px solid var(--line); border-radius: 14px; background: white; }
  .comparison-table-home tr:first-child { margin-top: 0; }
  .comparison-table-home td { display: grid; grid-template-columns: minmax(105px, .72fr) 1.28fr; gap: 12px; border: 0; border-top: 1px solid var(--line); font-size: .92rem; }
  .comparison-table-home td:first-child { border-top: 0; background: var(--blue-pale); }
  .comparison-table-home td::before { content: attr(data-label); color: var(--ink); font-size: .78rem; font-weight: 900; line-height: 1.35; text-align: left; text-transform: uppercase; }
  .faq { width: min(100% - 24px, 900px); }
  summary { min-height: 56px; padding: 18px 42px 18px 0; line-height: 1.45; }
  summary::after { top: 14px; }
  .cta-grid { display: block; }
  .cta-grid .button { margin-top: 22px; }
  .page-hero { padding: 28px 0 42px; }
  .page-hero .container { display: flex; flex-direction: column; gap: 0; }
  .page-hero .container > div:not(.product-stage) { display: contents; }
  .page-hero .eyebrow { order: 1; margin-bottom: 10px; }
  .page-hero h1 { order: 2; font-size: clamp(2rem, 10vw, 2.7rem); }
  .page-hero img, .page-hero .product-stage { order: 3; width: 100%; max-height: 280px; margin: 16px 0 0; object-fit: contain; border-radius: 16px; background: white; }
  .page-hero .product-stage { max-height: none; padding: 0; }
  .page-hero .product-stage img { max-height: 280px; margin: 0; }
  .page-hero .container > div > p:not(.eyebrow) { order: 4; margin-top: 16px; font-size: 1rem; }
  .page-hero .actions { order: 5; }
  .article { gap: 30px; }
  .toc { display: flex; gap: 8px; margin-inline: -12px; padding: 2px 12px 10px; overflow-x: auto; overscroll-behavior-inline: contain; scrollbar-width: none; }
  .toc::-webkit-scrollbar { display: none; }
  .toc strong { display: none; }
  .toc a { flex: 0 0 auto; min-height: 42px; padding: 9px 13px; border: 1px solid var(--line); border-radius: 999px; background: var(--wash); color: var(--ink); white-space: nowrap; }
  .prose h2 { margin-top: 38px; font-size: 1.65rem; }
  .prose h3 { font-size: 1.2rem; }
  .prose { min-width: 0; }
  .prose ul:not(.criteria-list), .prose ol:not(.criteria-list) { padding-left: 1.25rem; }
  .prose li { text-wrap: pretty; }
  .prose ul:not(.criteria-list) > li + li, .prose ol:not(.criteria-list) > li + li { margin-top: .5rem; }
  .prose .callout { padding: 18px; }
  .criteria-list > li { padding: 20px 16px 18px 60px; }
  .criteria-list > li::before { top: 18px; left: 14px; width: 34px; height: 34px; }
  .prose table { display: block; width: 100%; overflow-x: auto; overscroll-behavior-inline: contain; scrollbar-width: thin; -webkit-overflow-scrolling: touch; }
  .prose table th, .prose table td { min-width: 150px; padding: 11px; font-size: .9rem; }
  .article-faq details { padding-inline: 14px; }
  .productivity-table, .productivity-table tbody, .productivity-table tr, .productivity-table td { display: block; width: 100%; }
  .productivity-table thead { display: none; }
  .prose .productivity-table { overflow: visible; }
  .productivity-table tr { margin-top: 14px; overflow: hidden; border: 1px solid var(--line); border-radius: 14px; background: white; }
  .productivity-table td { min-width: 0; border: 0; border-top: 1px solid var(--line); }
  .productivity-table td:first-child { border-top: 0; background: var(--blue-pale); }
  .productivity-table td::before { content: attr(data-label); display: block; margin-bottom: 5px; color: var(--ink); font-size: .76rem; font-weight: 900; text-transform: uppercase; }
  .hero-lede,
  .page-hero .container > div > p:not(.eyebrow),
  .answer-box p,
  .comparison-lede,
  .comparison-table-home td,
  .card p,
  .feature-copy > p,
  .check-list span,
  .proof-copy > p,
  .proof-point span,
  .section-head > p,
  details p,
  .prose p:not(.content-meta),
  .prose li,
  .prose td,
  .prose .callout,
  .video-caption,
  .cta-grid p {
    text-align: justify;
    text-align-last: left;
    text-justify: inter-word;
    line-height: 1.7;
  }
  .video-showcase--short, .video-grid .video-card:has(.video-frame--short) { max-width: 340px; margin-inline: auto; }
  .site-footer { padding-bottom: 34px; }
  .floating-zalo { right: 14px; bottom: calc(78px + env(safe-area-inset-bottom)); width: 58px; height: 58px; font-size: .84rem; }
  .mobile-cta { position: fixed; z-index: 60; left: 10px; right: 10px; bottom: calc(8px + env(safe-area-inset-bottom)); display: inline-flex; align-items: center; justify-content: center; min-height: 56px; gap: 8px; padding: 12px 18px; border: 1px solid rgba(255,255,255,.75); border-radius: 15px; background: var(--orange); color: white; box-shadow: 0 12px 30px rgba(0,0,0,.28); font-weight: 950; text-decoration: 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; }
}

/* Knowledge hub and long-form technical articles */
.knowledge-hub-hero { padding: 82px 0 72px; background: radial-gradient(circle at 88% 18%, rgba(0,105,200,.16), transparent 34%), linear-gradient(135deg, #eef7ff, #fff); }
.knowledge-hub-hero .container { max-width: 900px; margin-left: max(20px, calc((100vw - 1160px) / 2)); }
.knowledge-hub-hero h1 { max-width: 900px; font-size: clamp(2.5rem, 5vw, 4.4rem); line-height: 1.08; text-wrap: balance; }
.knowledge-hub-hero p:not(.eyebrow) { max-width: 760px; color: var(--muted); font-size: 1.16rem; }
.knowledge-hero-actions { display: flex; flex-wrap: wrap; gap: 12px; margin-top: 28px; }
.knowledge-list-heading { margin-bottom: 30px; }
.knowledge-list-heading h2 { margin: 0; font-size: clamp(2rem, 4vw, 3.1rem); }
.knowledge-grid { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 26px; }
.knowledge-card { display: grid; grid-template-columns: 210px minmax(0, 1fr); min-width: 0; overflow: hidden; border: 1px solid var(--line); border-radius: 20px; background: white; box-shadow: 0 12px 34px rgba(16,37,56,.08); }
.knowledge-card-media { min-height: 100%; overflow: hidden; background: var(--blue-pale); }
.knowledge-card-media img { width: 100%; height: 100%; min-height: 270px; object-fit: cover; transition: transform .25s ease; }
.knowledge-card:hover .knowledge-card-media img { transform: scale(1.025); }
.knowledge-card-body { padding: 23px 22px; }
.knowledge-kicker { margin: 0 0 8px; color: var(--blue); font-size: .77rem; font-weight: 900; letter-spacing: .045em; text-transform: uppercase; }
.knowledge-card h2 { margin: 0 0 10px; font-size: 1.3rem; line-height: 1.28; }
.knowledge-card h2 a, .text-link { text-decoration: none; }
.knowledge-card h2 a:hover, .text-link:hover { color: var(--blue); }
.knowledge-card-body > p:not(.knowledge-kicker) { margin: 0 0 16px; color: var(--muted); font-size: .93rem; }
.text-link { color: var(--blue-dark); font-weight: 850; }
.knowledge-home-more { margin: 28px 0 0; }
.knowledge-article-hero img { width: 100%; max-height: 430px; border-radius: 22px; object-fit: cover; box-shadow: var(--shadow); }
.article-intro { margin: 0 0 32px; padding: 20px 22px; border-left: 5px solid var(--blue); background: var(--wash); color: var(--ink) !important; font-size: 1.08rem; font-weight: 650; }
.article-figure { margin: 30px 0; overflow: hidden; border: 1px solid var(--line); border-radius: 18px; background: var(--wash); }
.article-figure img { width: 100%; max-height: 560px; object-fit: cover; }
.article-figure figcaption { padding: 12px 16px; color: var(--muted); font-size: .88rem; }
.article-comparison { font-size: .94rem; }
.compact-criteria { grid-template-columns: repeat(2, minmax(0, 1fr)); }
.cost-formula { margin: 24px 0; padding: 22px; border: 1px solid #abd5fa; border-radius: 16px; background: var(--blue-pale); color: var(--blue-dark); font-size: 1.08rem; font-weight: 900; text-align: center; }
.article-video-section { scroll-margin-top: 100px; }
.article-video-section .video-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
.article-video-section .video-card h3 { font-size: 1.02rem; }
.related-grid { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 18px; }
.related-card { padding: 24px; border: 1px solid var(--line); border-radius: 18px; background: white; }
.related-card p { margin: 0 0 8px; color: var(--blue); font-size: .78rem; font-weight: 900; text-transform: uppercase; }
.related-card h3 { margin: 0 0 14px; font-size: 1.12rem; }
.related-card h3 a, .related-card > a { text-decoration: none; }
.related-card > a { color: var(--blue-dark); font-weight: 850; }

@media (max-width: 1100px) {
  .knowledge-card { grid-template-columns: 160px minmax(0, 1fr); }
}

@media (max-width: 900px) {
  .knowledge-grid { grid-template-columns: 1fr; }
  .knowledge-card { grid-template-columns: 220px minmax(0, 1fr); }
  .related-grid { grid-template-columns: 1fr; }
}

@media (max-width: 620px) {
  .knowledge-hub-hero { padding: 46px 0 42px; }
  .knowledge-hub-hero .container { margin-inline: auto; }
  .knowledge-hub-hero h1 { font-size: clamp(2rem, 8.5vw, 2.55rem); line-height: 1.12; }
  .knowledge-hero-actions { display: grid; }
  .knowledge-card { grid-template-columns: 1fr; }
  .knowledge-card-media { aspect-ratio: 4 / 3; }
  .knowledge-card-media img { height: 100%; min-height: 0; max-height: none; }
  .knowledge-card-body { padding: 20px 18px 22px; }
  .compact-criteria { grid-template-columns: 1fr; }
  .article-video-section .video-grid { grid-template-columns: 1fr; }
  .article-figure img { max-height: 380px; }
}

@media (max-width: 640px) {
  .knowledge-article-hero h1 {
    font-size: clamp(2rem, 9vw, 2.55rem);
    line-height: 1.14;
    letter-spacing: -.035em;
    text-wrap: balance;
  }
  .knowledge-article-hero + .section .prose h2 {
    max-width: 100%;
    margin-top: 32px;
    margin-bottom: 12px;
    font-size: clamp(1.4rem, 6.3vw, 1.55rem);
    line-height: 1.28;
    letter-spacing: -.025em;
    text-wrap: balance;
  }
  .knowledge-article-hero + .section .prose h3 {
    line-height: 1.35;
    letter-spacing: -.015em;
    text-wrap: balance;
  }
  .knowledge-card h2,
  .related-card h3,
  .article-video-section .video-card h3 {
    line-height: 1.32;
    text-wrap: balance;
  }
  .knowledge-article-hero h1,
  .knowledge-article-hero + .section .prose h2,
  .knowledge-article-hero + .section .prose h3,
  .knowledge-card h2,
  .related-card h3,
  .article-video-section .video-card h3 {
    word-break: normal;
    overflow-wrap: normal;
    hyphens: none;
  }
  .knowledge-article-hero + .section .prose p:not(.content-meta),
  .knowledge-article-hero + .section .prose li,
  .knowledge-article-hero + .section .prose td,
  .knowledge-article-hero + .section .prose .callout {
    text-align: justify;
    text-align-last: left;
    text-justify: inter-word;
  }
}