:root {
    --ink: #13201d;
    --forest: #102a24;
    --forest-2: #193d35;
    --paper: #f3efe4;
    --paper-2: #faf8f2;
    --white: #ffffff;
    --line: #d8ddd8;
    --muted: #60706b;
    --accent: #d7802f;
    --accent-dark: #ae5e19;
    --zalo: #0866d9;
    --danger: #b3261e;
    --success: #26734d;
    --shadow: 0 24px 60px rgba(16, 42, 36, .12);
    --radius: 8px;
    --container: 1200px;
}

*, *::before, *::after { box-sizing: border-box; }
html { overflow-x: hidden; scroll-behavior: smooth; scroll-padding-top: 100px; }
body {
    margin: 0;
    color: var(--ink);
    background: var(--paper-2);
    font-family: Inter, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
    font-size: 16px;
    line-height: 1.65;
    -webkit-font-smoothing: antialiased;
}
body.menu-open { overflow: hidden; }
img { display: block; max-width: 100%; }
a { color: inherit; }
button, input, select, textarea { font: inherit; }
button, a { -webkit-tap-highlight-color: transparent; }
h1, h2, h3, p { margin-top: 0; }
h1, h2, h3 {
    color: var(--forest);
    font-weight: 750;
    letter-spacing: -.035em;
    line-height: 1.12;
}
h1 { margin-bottom: 24px; font-size: clamp(2.6rem, 5.6vw, 5.2rem); }
h2 { margin-bottom: 20px; font-size: clamp(2rem, 3.6vw, 3.35rem); }
h3 { margin-bottom: 12px; font-size: 1.35rem; }
p { margin-bottom: 20px; }

.container { width: min(calc(100% - 40px), var(--container)); margin-inline: auto; }
.narrow { max-width: 820px; }
.section { padding: 110px 0; }
.section-paper { background: var(--paper); }
.section-dark { color: rgba(255,255,255,.76); background: var(--forest); }
.section-dark h2, .section-dark h3 { color: var(--white); }
.lead { font-size: 1.16rem; color: #43534e; }
.muted { color: var(--muted); font-size: .92rem; }
.centered { margin-inline: auto; text-align: center; }
.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: 9999;
    top: 12px;
    left: 12px;
    padding: 10px 16px;
    color: var(--white);
    background: var(--forest);
    transform: translateY(-160%);
}
.skip-link:focus { transform: translateY(0); }

.eyebrow {
    margin-bottom: 18px;
    color: var(--accent-dark);
    font-size: .78rem;
    font-weight: 800;
    letter-spacing: .15em;
    line-height: 1.4;
    text-transform: uppercase;
}
.eyebrow-light { color: #f1bd88; }
.section-heading { margin-bottom: 52px; max-width: 700px; }
.section-heading > p:last-child { color: var(--muted); }
.section-heading.centered > p:last-child { max-width: 650px; margin-inline: auto; }
.split-heading { display: grid; grid-template-columns: 1.1fr .72fr; gap: 80px; align-items: end; max-width: none; }
.split-heading h2 { margin-bottom: 0; }

.button {
    display: inline-flex;
    min-height: 52px;
    align-items: center;
    justify-content: center;
    gap: 16px;
    padding: 13px 23px;
    border: 1px solid var(--forest);
    border-radius: 3px;
    color: var(--white);
    background: var(--forest);
    font-size: .94rem;
    font-weight: 750;
    line-height: 1.2;
    text-align: center;
    text-decoration: none;
    cursor: pointer;
    transition: color .2s ease, background .2s ease, border-color .2s ease, transform .2s ease;
}
.button:hover { background: var(--forest-2); transform: translateY(-2px); }
.button:focus-visible, .text-link:focus-visible, a:focus-visible, button:focus-visible, input:focus-visible, select:focus-visible, textarea:focus-visible, summary:focus-visible {
    outline: 3px solid #f0aa63;
    outline-offset: 3px;
}
.button-secondary { color: var(--forest); background: transparent; }
.button-secondary:hover { color: var(--white); }
.button-zalo { border-color: var(--zalo); background: var(--zalo); }
.button-zalo:hover { background: #0757b7; }
.button-light { color: var(--forest); border-color: var(--white); background: var(--white); }
.button-light:hover { color: var(--white); background: transparent; }
.button-outline-light { color: var(--white); border-color: rgba(255,255,255,.55); background: transparent; }
.button-outline-light:hover { color: var(--forest); background: var(--white); }
.button-small { min-height: 44px; padding: 10px 17px; }
.button-large { min-height: 60px; padding: 16px 28px; font-size: 1rem; }
.button-row { display: flex; flex-wrap: wrap; gap: 12px; }
.centered-row { justify-content: center; }
.text-link {
    display: inline-flex;
    align-items: center;
    gap: 14px;
    color: var(--forest);
    font-weight: 780;
    text-decoration: none;
}
.text-link span { transition: transform .2s ease; }
.text-link:hover span { transform: translateX(5px); }

.site-header {
    position: sticky;
    z-index: 1000;
    top: 0;
    border-bottom: 1px solid transparent;
    background: rgba(250, 248, 242, .94);
    backdrop-filter: blur(16px);
    transition: border-color .2s ease, box-shadow .2s ease;
}
.site-header.scrolled { border-color: var(--line); box-shadow: 0 8px 24px rgba(16, 42, 36, .05); }
.header-inner { display: flex; min-height: 86px; align-items: center; justify-content: space-between; gap: 28px; }
.brand { display: inline-flex; align-items: center; gap: 12px; color: var(--forest); text-decoration: none; }
.brand-icon { position: relative; display: block; width: 43px; height: 42px; }
.brand-icon i { position: absolute; display: block; width: 29px; height: 32px; border: 2px solid currentColor; background: var(--paper-2); transform: skewY(-7deg); }
.brand-icon i:nth-child(1) { top: 7px; left: 2px; opacity: .38; }
.brand-icon i:nth-child(2) { top: 3px; left: 7px; opacity: .65; }
.brand-icon i:nth-child(3) { top: 0; left: 12px; border-color: var(--accent-dark); }
.brand-copy { display: flex; flex-direction: column; font-size: .76rem; letter-spacing: .2em; line-height: 1.05; }
.brand-copy strong { font-size: .92rem; letter-spacing: .11em; }
.brand-copy span { color: var(--accent-dark); font-weight: 850; }
.primary-nav { display: flex; align-items: center; gap: 16px; }
.primary-nav > a:not(.button) { position: relative; font-size: .84rem; font-weight: 680; text-decoration: none; }
.primary-nav > a:not(.button)::after { position: absolute; right: 0; bottom: -8px; left: 0; height: 2px; background: var(--accent); content: ''; transform: scaleX(0); transition: transform .2s ease; }
.primary-nav > a:hover::after, .primary-nav > a.active::after { transform: scaleX(1); }
.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: 24px; height: 2px; margin: 5px auto; background: var(--forest); transition: transform .2s ease, opacity .2s ease; }

.hero { position: relative; overflow: hidden; padding: 70px 0 90px; background: var(--paper); }
.hero::before { position: absolute; top: -20%; left: -10%; width: 460px; height: 460px; border: 1px solid rgba(174,94,25,.15); border-radius: 50%; content: ''; }
.hero-grid { position: relative; display: grid; grid-template-columns: .92fr 1.08fr; gap: clamp(40px, 7vw, 100px); align-items: center; }
.hero-copy { padding: 50px 0; }
.hero-copy h1 { max-width: 700px; }
.hero-lead { max-width: 600px; margin-bottom: 32px; color: #475651; font-size: 1.2rem; }
.service-line { display: flex; max-width: 620px; margin: -10px 0 26px; padding-left: 16px; border-left: 3px solid var(--accent); flex-direction: column; gap: 3px; }
.service-line strong { color: var(--forest); font-size: .9rem; }
.service-line span { color: var(--muted); font-size: .88rem; }
.hero-actions { margin-bottom: 18px; }
.hero-contact-links { display: flex; flex-wrap: wrap; gap: 8px 24px; }
.hero-contact-links a { color: var(--accent-dark); font-size: .86rem; font-weight: 750; text-underline-offset: 4px; }
.hero-note { display: flex; max-width: 320px; align-items: center; justify-content: space-between; margin-top: 46px; padding-top: 18px; border-top: 1px solid #c8c2b4; }
.hero-note strong { font-size: .84rem; }
.hero-note span { color: var(--muted); font-size: .88rem; }
.hero-visual { position: relative; min-height: 610px; margin: 0; }
.hero-visual::before { position: absolute; z-index: 0; top: 30px; right: -30px; bottom: -30px; left: 30px; border: 1px solid rgba(16,42,36,.25); content: ''; }
.hero-visual img { position: relative; z-index: 1; width: 100%; height: 610px; object-fit: cover; filter: saturate(.68) sepia(.1); }
.hero-badge { position: absolute; z-index: 2; bottom: 0; left: -38px; display: flex; min-width: 220px; align-items: center; gap: 18px; padding: 20px; color: var(--white); background: var(--forest); box-shadow: var(--shadow); }
.hero-badge strong { color: #efb67d; font-size: 2rem; }
.hero-badge span { font-size: .82rem; line-height: 1.4; text-transform: uppercase; }

.trust-strip { color: var(--white); background: var(--forest); }
.trust-grid { display: grid; grid-template-columns: repeat(3, 1fr); }
.trust-grid > div { display: flex; min-height: 136px; align-items: center; gap: 20px; padding: 28px 32px; border-right: 1px solid rgba(255,255,255,.13); }
.trust-grid > div:first-child { border-left: 1px solid rgba(255,255,255,.13); }
.trust-grid p { margin: 0; color: rgba(255,255,255,.67); font-size: .85rem; line-height: 1.5; }
.trust-grid strong { color: var(--white); font-size: .96rem; }
.trust-number { color: #efb67d; font-family: Georgia, serif; font-size: 1.8rem; font-style: italic; }

.product-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 30px; }
.product-card { overflow: hidden; border: 1px solid var(--line); background: var(--white); transition: box-shadow .25s ease, transform .25s ease; }
.product-card:hover { box-shadow: var(--shadow); transform: translateY(-5px); }
.product-image { position: relative; display: block; overflow: hidden; height: 320px; background: #ddd6c5; }
.product-image img { width: 100%; height: 100%; object-fit: cover; filter: saturate(.65); transition: transform .5s ease; }
.product-card:hover .product-image img { transform: scale(1.035); }
.product-image > span, .product-detail-image > span { position: absolute; right: 18px; bottom: 18px; display: grid; width: 48px; height: 48px; place-items: center; color: var(--forest); background: var(--paper-2); font-weight: 850; }
.product-content { padding: 32px; }
.product-content h3 { font-size: 1.65rem; }
.product-content > p:not(.product-type) { min-height: 52px; color: var(--muted); }
.product-type { margin-bottom: 10px; color: var(--accent-dark); font-size: .72rem; font-weight: 850; letter-spacing: .14em; }
.product-facts { display: grid; gap: 7px; margin: 20px 0; padding: 0; color: #40514b; font-size: .84rem; list-style: none; }
.product-facts li { position: relative; padding-left: 20px; }
.product-facts li::before { position: absolute; top: .64em; left: 0; width: 8px; height: 8px; border: 2px solid var(--accent-dark); content: ''; transform: translateY(-50%) rotate(45deg); }
.product-facts-detail { margin-bottom: 25px; font-size: .95rem; font-weight: 700; }
.product-actions { display: flex; flex-wrap: wrap; justify-content: space-between; gap: 12px 20px; }
.text-link-zalo { color: var(--zalo); }

.process-layout { display: grid; grid-template-columns: .8fr 1.2fr; gap: 100px; }
.process-intro { position: sticky; top: 130px; align-self: start; }
.process-intro > p:not(.eyebrow) { color: rgba(255,255,255,.65); }
.process-list { margin: 0; padding: 0; list-style: none; }
.process-list li { display: grid; grid-template-columns: 72px 1fr; gap: 18px; padding: 30px 0; border-top: 1px solid rgba(255,255,255,.15); }
.process-list li:last-child { border-bottom: 1px solid rgba(255,255,255,.15); }
.process-list > li > span { color: #efb67d; font-family: Georgia, serif; font-size: 1.6rem; font-style: italic; }
.process-list h3 { margin-bottom: 7px; }
.process-list p { margin: 0; color: rgba(255,255,255,.64); }

.factory-grid { display: grid; grid-template-columns: 1.05fr .95fr; gap: 90px; align-items: center; }
.factory-image { position: relative; margin: 0; }
.factory-image::after { position: absolute; top: -24px; right: -24px; width: 45%; height: 45%; border-top: 1px solid var(--accent); border-right: 1px solid var(--accent); content: ''; }
.factory-image img { width: 100%; height: 610px; object-fit: cover; filter: saturate(.55); }
.check-list { display: grid; gap: 14px; margin: 30px 0 0; padding: 0; list-style: none; }
.check-list li { position: relative; padding-left: 34px; }
.check-list li::before { position: absolute; top: .28em; left: 0; display: grid; width: 20px; height: 20px; place-items: center; border: 1px solid #a5b1ac; border-radius: 50%; color: var(--success); content: '✓'; font-size: .72rem; font-weight: 800; }
.check-list.compact { gap: 8px; margin: 18px 0 24px; }

.application-grid { display: grid; grid-template-columns: repeat(4, 1fr); border-top: 1px solid #cfc8b8; border-left: 1px solid #cfc8b8; }
.application-grid article { min-height: 280px; padding: 30px; border-right: 1px solid #cfc8b8; border-bottom: 1px solid #cfc8b8; }
.application-grid span { display: inline-block; margin-bottom: 65px; color: var(--accent-dark); font-family: Georgia, serif; font-size: 1.6rem; font-style: italic; }
.application-grid p { margin: 0; color: var(--muted); font-size: .92rem; }

.commercial-grid { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 28px; }
.commercial-card { display: grid; grid-template-columns: minmax(180px, .8fr) minmax(0, 1.2fr); min-height: 330px; border: 1px solid var(--line); background: var(--white); overflow: hidden; }
.commercial-card > img { width: 100%; height: 100%; min-height: 330px; object-fit: cover; }
.commercial-card > div { display: flex; padding: 30px; flex-direction: column; }
.commercial-card h3 { margin: 6px 0 12px; font-size: 1.45rem; }
.commercial-card h3 a { text-decoration: none; }
.commercial-card p:not(.eyebrow) { color: var(--muted); }
.commercial-card .text-link { margin-top: auto; padding-top: 18px; }
.tag-list { display: flex; flex-wrap: wrap; gap: 7px; margin: 8px 0 0; padding: 0; list-style: none; }
.tag-list li { padding: 5px 9px; color: var(--forest); background: var(--paper); font-size: .72rem; font-weight: 700; }
.solution-link-grid { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 10px; margin-top: 28px; }
.solution-link-grid a { display: flex; min-height: 54px; padding: 13px 15px; align-items: center; justify-content: space-between; border: 1px solid var(--line); color: var(--forest); background: var(--white); font-size: .86rem; font-weight: 750; text-decoration: none; }
.solution-link-grid a:hover { border-color: var(--accent); transform: translateY(-2px); }
.benefit-grid { display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); gap: 1px; background: var(--line); border: 1px solid var(--line); }
.benefit-grid article { min-height: 280px; padding: 30px; background: var(--white); }
.benefit-grid span { display: block; margin-bottom: 46px; color: var(--accent-dark); font-family: Georgia, serif; font-size: 1.5rem; font-style: italic; }
.benefit-grid h3 { font-size: 1.2rem; }
.benefit-grid p { color: var(--muted); font-size: .88rem; }
.quote-data-list { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 10px; margin: 0 0 38px; padding: 0; list-style: none; }
.quote-data-list li { padding: 13px 16px 13px 42px; color: rgba(255,255,255,.84); border: 1px solid rgba(255,255,255,.15); background: rgba(255,255,255,.04); position: relative; }
.quote-data-list li::before { position: absolute; left: 16px; color: #efb67d; content: '✓'; }
.process-list-compact { gap: 0; }
.process-list-compact li { min-height: 115px; padding: 20px 0; }
.service-area-grid { display: grid; grid-template-columns: 1.25fr .75fr; gap: 80px; align-items: start; }
.area-list { display: flex; flex-wrap: wrap; gap: 10px; margin-top: 30px; }
.area-list a, .area-list span { padding: 10px 14px; border: 1px solid var(--line); color: var(--forest); background: var(--white); font-size: .86rem; font-weight: 750; text-decoration: none; }
.area-list a:hover { border-color: var(--accent); }
.service-contact-card { display: grid; gap: 10px; padding: 36px; color: rgba(255,255,255,.82); background: var(--forest); box-shadow: var(--shadow); }
.service-contact-card h3 { margin-bottom: 4px; color: var(--white); font-size: 1.75rem; }
.service-contact-card a { color: var(--white); font-weight: 750; overflow-wrap: anywhere; }

.special-cta { display: grid; grid-template-columns: 70px 1fr auto; gap: 34px; align-items: center; padding: 42px; border: 1px solid #cbd2ce; background: var(--white); box-shadow: 0 18px 45px rgba(16,42,36,.07); }
.special-cta h2 { max-width: 760px; margin: 0; font-size: clamp(1.35rem, 2.1vw, 2rem); }
.special-cta .eyebrow { margin-bottom: 8px; }
.special-icon { display: grid; width: 70px; height: 70px; place-items: center; border: 1px solid var(--accent); color: var(--accent-dark); font-size: 2rem; }

.faq-section { padding-top: 70px; }
.faq-grid { display: grid; grid-template-columns: .8fr 1.2fr; gap: 100px; }
.accordion details { border-top: 1px solid var(--line); }
.accordion details:last-child { border-bottom: 1px solid var(--line); }
.accordion summary { position: relative; padding: 24px 48px 24px 0; color: var(--forest); font-size: 1.1rem; font-weight: 750; cursor: pointer; list-style: none; }
.accordion summary::-webkit-details-marker { display: none; }
.accordion summary::after { position: absolute; top: 20px; right: 4px; color: var(--accent-dark); content: '+'; font-size: 1.55rem; font-weight: 400; }
.accordion details[open] summary::after { content: '−'; }
.accordion details p { padding-right: 50px; color: var(--muted); }
.closing-cta { padding: 75px 0; color: var(--white); background: var(--forest-2); }
.closing-grid { display: grid; grid-template-columns: 1fr auto; gap: 40px; align-items: center; }
.closing-grid h2 { margin: 0; color: var(--white); }

.page-hero { padding: 100px 0 90px; text-align: center; background: var(--paper); }
.page-hero h1 { font-size: clamp(2.7rem, 5vw, 4.6rem); }
.page-hero p:not(.eyebrow) { color: var(--muted); font-size: 1.18rem; }
.breadcrumb { padding: 14px 0; border-bottom: 1px solid var(--line); color: var(--muted); background: #fff; font-size: .78rem; }
.breadcrumb .container { display: flex; gap: 10px; align-items: center; overflow-wrap: anywhere; }
.breadcrumb a { color: var(--accent-dark); }
.catalog-hero { padding-top: 82px; }
.catalog-hero-grid { display: grid; grid-template-columns: .92fr 1.08fr; gap: 72px; align-items: center; text-align: left; }
.catalog-hero-visual { margin: 0; }
.catalog-hero-visual img { width: 100%; height: 430px; object-fit: cover; box-shadow: var(--shadow); }
.catalog-phone { display: inline-block; margin-top: 18px; color: var(--accent-dark); font-size: .9rem; font-weight: 750; text-underline-offset: 4px; }
.topic-grid { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 22px; }
.topic-grid article { display: flex; min-height: 290px; padding: 30px; border: 1px solid var(--line); background: var(--white); flex-direction: column; }
.topic-grid article h3 { margin: 7px 0 12px; font-size: 1.35rem; }
.topic-grid article h3 a { text-decoration: none; }
.topic-grid article p:not(.eyebrow) { color: var(--muted); }
.topic-grid article .text-link { margin-top: auto; padding-top: 18px; }
.topic-grid-featured { grid-template-columns: repeat(4, minmax(0, 1fr)); }
.product-catalog-grid article { padding: 0; overflow: hidden; }
.product-catalog-grid article > img { width: 100%; height: 190px; object-fit: cover; }
.product-catalog-grid article > div { display: flex; height: 100%; padding: 26px; flex-direction: column; }
.section-action { margin-top: 34px; text-align: center; }
.application-grid h3 a { color: inherit; text-decoration: none; }
.content-two-column { display: grid; grid-template-columns: minmax(0, 1fr) 360px; gap: 70px; align-items: start; }
.catalog-copy { max-width: none; }
.catalog-copy > h2:first-of-type { margin-top: 8px; }
.seo-content-grid { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 24px; }
.seo-content-grid article { padding: 32px; border: 1px solid var(--line); background: var(--white); }
.seo-content-grid h2 { font-size: 1.55rem; }
.seo-content-grid p { color: var(--muted); }
.commercial-link-grid { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 12px; }
.commercial-link-grid a { display: flex; min-height: 64px; align-items: center; justify-content: space-between; gap: 18px; padding: 16px 20px; border: 1px solid var(--line); color: var(--forest); background: var(--white); font-weight: 750; text-decoration: none; }
.commercial-link-grid a:hover { border-color: var(--accent); transform: translateY(-2px); }
.commercial-note { border-left-color: var(--accent-dark); background: #fff8ec; }
.evidence-note { margin-top: 42px; padding: 24px; border-left: 3px solid var(--accent); background: var(--paper); }
.evidence-note strong { color: var(--forest); }
.evidence-note p { margin-bottom: 0; }
.decision-card { position: sticky; top: 110px; }
.product-detail-list { display: grid; gap: 100px; }
.product-detail { display: grid; grid-template-columns: 1fr 1fr; gap: 80px; align-items: center; scroll-margin-top: 120px; }
.product-detail:nth-child(even) .product-detail-image { order: 2; }
.product-detail-image { position: relative; overflow: hidden; min-height: 470px; background: var(--paper); }
.product-detail-image img { width: 100%; height: 470px; object-fit: cover; filter: saturate(.65); }
.product-detail-copy h3 { margin-top: 28px; font-size: 1rem; letter-spacing: -.01em; }
.compact-cta { display: grid; grid-template-columns: 1fr auto; gap: 60px; align-items: center; }
.compact-cta h2 { max-width: 760px; margin: 0; font-size: clamp(1.75rem, 3vw, 2.8rem); }
.about-hero-grid { display: grid; grid-template-columns: .9fr 1.1fr; gap: 80px; align-items: center; text-align: left; }
.about-hero-grid figure { position: relative; margin: 0; }
.about-hero-grid img { width: 100%; height: 500px; object-fit: cover; filter: saturate(.55); }
.statement-grid { display: grid; grid-template-columns: 100px 1fr; gap: 80px 50px; max-width: 930px; }
.statement-number { margin: 0; color: var(--accent-dark); font-family: Georgia, serif; font-size: 2rem; font-style: italic; }
.contact-grid { display: grid; grid-template-columns: 1.1fr .9fr; gap: 60px; }
.contact-panel, .zalo-card { padding: 44px; border: 1px solid var(--line); background: var(--white); }
.contact-list { margin: 30px 0 0; }
.contact-list div { display: grid; grid-template-columns: 150px 1fr; gap: 20px; padding: 18px 0; border-top: 1px solid var(--line); }
.contact-list div:last-child { border-bottom: 1px solid var(--line); }
.contact-list dt { color: var(--muted); font-size: .85rem; }
.contact-list dd { margin: 0; font-weight: 680; overflow-wrap: anywhere; }
.contact-actions { margin-top: 28px; }
.zalo-card { color: var(--white); background: #0c5fc0; }
.zalo-card h2, .zalo-card .eyebrow { color: var(--white); }
.zalo-card blockquote { margin: 28px 0; padding: 24px; border-left: 2px solid rgba(255,255,255,.55); background: rgba(255,255,255,.08); font-size: 1.05rem; }
.zalo-card .button { margin: 4px 6px 4px 0; }
.zalo-card .button-secondary { color: var(--white); border-color: rgba(255,255,255,.75); }
.zalo-card .button-zalo { color: #0c5fc0; border-color: var(--white); background: var(--white); }
.zalo-mark { display: grid; width: 56px; height: 56px; margin-bottom: 40px; place-items: center; border-radius: 12px; color: #0c5fc0; background: var(--white); font-size: 1.6rem; font-weight: 900; }
.prose { max-width: 850px; }
.prose h2 { margin-top: 50px; font-size: 1.55rem; }
.prose p { color: #45544f; }
.notice { padding: 24px; border-left: 3px solid var(--accent); background: var(--paper); }

.quote-hero { padding-bottom: 130px; }
.quote-section { margin-top: -80px; padding-top: 0; }
.quote-layout { display: grid; grid-template-columns: minmax(0, 1fr) 330px; gap: 34px; align-items: start; }
.quote-form { padding: 50px; border: 1px solid var(--line); background: var(--white); box-shadow: var(--shadow); }
.quote-form fieldset { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 22px; margin: 0 0 50px; padding: 0 0 50px; border: 0; border-bottom: 1px solid var(--line); }
.quote-form legend { display: block; width: 100%; margin-bottom: 30px; color: var(--forest); font-size: 1.45rem; font-weight: 780; letter-spacing: -.025em; }
.quote-form legend span { display: inline-grid; width: 36px; height: 36px; margin-right: 12px; place-items: center; border: 1px solid #bfc8c4; border-radius: 50%; color: var(--accent-dark); font-family: Georgia, serif; font-size: .9rem; }
.field { min-width: 0; }
.field-full, .dimension-intro { grid-column: 1 / -1; }
.field label { display: flex; align-items: center; justify-content: space-between; gap: 10px; margin-bottom: 8px; color: var(--forest); font-size: .88rem; font-weight: 750; }
.field label > span[aria-hidden], .form-consent span[aria-hidden] { color: var(--danger); }
.optional { color: var(--muted); font-size: .72rem; font-weight: 500; }
.field input, .field select, .field textarea {
    width: 100%;
    min-height: 52px;
    padding: 12px 14px;
    border: 1px solid #b9c2be;
    border-radius: 2px;
    color: var(--ink);
    background: #fff;
    transition: border-color .2s ease, box-shadow .2s ease;
}
.field textarea { resize: vertical; }
.field input:hover, .field select:hover, .field textarea:hover { border-color: #7e8e88; }
.field input[aria-invalid="true"], .field select[aria-invalid="true"], .field textarea[aria-invalid="true"] { border-color: var(--danger); box-shadow: 0 0 0 2px rgba(179,38,30,.08); }
.field-error { display: block; min-height: 20px; margin-top: 5px; color: var(--danger); font-size: .78rem; }
.form-hint { display: block; margin-top: 6px; color: var(--muted); font-size: .78rem; }
.dimension-intro { display: grid; grid-template-columns: 180px 1fr; gap: 22px; align-items: center; padding: 15px 18px; color: var(--forest); background: var(--paper); }
.dimension-intro img { width: 100%; height: auto; border: 1px solid #d3c9b6; background: #fffdf8; }
.dimension-intro strong, .dimension-intro span { display: block; }
.dimension-intro span { margin-top: 5px; color: var(--muted); font-size: .82rem; }
.dimension-fields { padding: 18px; border: 1px solid var(--line); background: #fbfaf6; }
.dimension-fields[hidden] { display: none; }
.form-grid-four { display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); gap: 14px; margin-top: 18px; }
.form-more { margin: -18px 0 46px; border: 1px solid var(--line); background: #fbfaf6; }
.form-more > summary { display: flex; padding: 18px 22px; color: var(--forest); font-weight: 760; cursor: pointer; align-items: center; justify-content: space-between; gap: 20px; }
.form-more > summary span { color: var(--muted); font-size: .75rem; font-weight: 500; }
.form-more[open] > summary { border-bottom: 1px solid var(--line); }
.form-more fieldset { margin: 0; padding: 28px 24px; border-bottom: 0; background: var(--white); }
.file-field input { padding: 8px; border-style: dashed; }
.file-field input::file-selector-button { margin-right: 14px; padding: 8px 12px; border: 0; color: var(--white); background: var(--forest); font-weight: 700; cursor: pointer; }
.form-consent { margin-bottom: 30px; }
.form-consent label { display: flex; align-items: flex-start; gap: 12px; cursor: pointer; }
.form-consent input { width: 20px; height: 20px; flex: 0 0 auto; margin-top: 2px; accent-color: var(--forest); }
.form-consent a { color: var(--accent-dark); }
.form-submit { display: flex; align-items: center; justify-content: space-between; gap: 30px; }
.form-submit p { max-width: 310px; margin: 0; color: var(--muted); font-size: .76rem; }
.honeypot { position: absolute !important; left: -9999px !important; width: 1px; height: 1px; overflow: hidden; }
.form-alert { display: flex; flex-direction: column; margin-bottom: 35px; padding: 18px 20px; border-left: 4px solid var(--danger); color: #6f1b17; background: #fff0ee; }
.quote-aside { position: sticky; top: 110px; display: grid; gap: 24px; }
.aside-card { padding: 30px; border: 1px solid var(--line); background: var(--white); }
.aside-card h2 { font-size: 1.45rem; }
.aside-card ol { display: grid; gap: 18px; margin: 28px 0 0; padding: 0; list-style: none; }
.aside-card li { display: flex; align-items: center; gap: 14px; color: #45544f; font-size: .9rem; }
.aside-card li span { color: var(--accent-dark); font-family: Georgia, serif; font-style: italic; }
.aside-zalo { color: rgba(255,255,255,.78); border: 0; background: var(--forest); }
.aside-zalo h2, .aside-zalo .text-link { color: var(--white); }

.status-page { display: grid; min-height: 650px; padding: 90px 0; place-items: center; background: var(--paper); }
.status-card { max-width: 760px; padding: 64px; border: 1px solid var(--line); background: var(--white); box-shadow: var(--shadow); text-align: center; }
.status-card h1 { font-size: clamp(2.2rem, 5vw, 4rem); }
.status-icon { display: grid; width: 70px; height: 70px; margin: 0 auto 30px; place-items: center; border: 1px solid var(--accent); border-radius: 50%; color: var(--accent-dark); font-size: 2rem; }
.status-icon.success { color: var(--success); border-color: var(--success); }
.request-code { display: inline-flex; flex-direction: column; gap: 4px; margin: 12px 0 24px; padding: 16px 30px; color: var(--white); background: var(--forest); }
.request-code span { color: rgba(255,255,255,.7); font-size: .72rem; text-transform: uppercase; }
.request-code strong { font-size: 1.3rem; letter-spacing: .08em; }
.error-code { display: block; color: var(--accent); font-family: Georgia, serif; font-size: clamp(5rem, 14vw, 9rem); font-style: italic; line-height: .85; }

.site-footer { padding: 80px 0 95px; color: rgba(255,255,255,.65); background: #0b1c18; }
.footer-grid { display: grid; grid-template-columns: 1.2fr .75fr 1.05fr; gap: 80px; }
.brand-footer { margin-bottom: 24px; color: var(--white); }
.brand-footer .brand-icon i { background: #0b1c18; }
.footer-grid h2 { margin-bottom: 24px; color: var(--white); font-size: .86rem; letter-spacing: .1em; text-transform: uppercase; }
.footer-links { display: grid; gap: 9px; margin: 0; padding: 0; list-style: none; }
.footer-links a { text-decoration: none; }
.footer-links a:hover { color: var(--white); }
.footer-grid address { display: grid; gap: 8px; font-style: normal; overflow-wrap: anywhere; }
.footer-bottom { display: flex; justify-content: space-between; gap: 40px; margin-top: 60px; padding-top: 24px; border-top: 1px solid rgba(255,255,255,.12); }
.footer-bottom p { margin: 0; font-size: .74rem; }
.footer-status { max-width: 440px; padding-left: 12px; border-left: 2px solid var(--accent); font-size: .78rem; }
.mobile-contact-bar { display: none; }

@media (max-width: 1050px) {
    .primary-nav { gap: 18px; }
    .primary-nav > a:not(.button) { font-size: .84rem; }
    .hero-grid { grid-template-columns: 1fr 1fr; gap: 45px; }
    .hero-visual, .hero-visual img { min-height: 530px; height: 530px; }
    .application-grid { grid-template-columns: repeat(2, 1fr); }
    .commercial-card { grid-template-columns: 1fr; }
    .commercial-card > img { min-height: 240px; height: 240px; }
    .benefit-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
    .quote-layout { grid-template-columns: 1fr; }
    .quote-aside { position: static; grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 1120px) {
    body { padding-bottom: 72px; }
    .section { padding: 80px 0; }
    .header-inner { min-height: 74px; }
    .menu-toggle { display: block; }
    .menu-toggle[aria-expanded="true"] > span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
    .menu-toggle[aria-expanded="true"] > span:nth-child(2) { opacity: 0; }
    .menu-toggle[aria-expanded="true"] > span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }
    .primary-nav { position: fixed; z-index: 999; top: 74px; right: 0; bottom: 0; left: 0; display: none; flex-direction: column; align-items: stretch; gap: 0; padding: 30px 24px 100px; background: var(--paper-2); overflow-y: auto; }
    .primary-nav.open { display: flex; }
    .primary-nav > a:not(.button) { padding: 17px 4px; border-bottom: 1px solid var(--line); font-size: 1.1rem; }
    .primary-nav .button { margin-top: 24px; }
    .hero { padding-top: 30px; }
    .hero-grid { grid-template-columns: 1fr; }
    .hero-copy { padding-bottom: 10px; }
    .hero-visual, .hero-visual img { min-height: 500px; height: 500px; }
    .hero-visual::before { right: -12px; bottom: -12px; left: 12px; }
    .hero-badge { left: 0; }
    .trust-grid { grid-template-columns: 1fr; }
    .trust-grid > div, .trust-grid > div:first-child { min-height: 110px; border-right: 1px solid rgba(255,255,255,.13); border-bottom: 1px solid rgba(255,255,255,.13); border-left: 1px solid rgba(255,255,255,.13); }
    .split-heading, .process-layout, .factory-grid, .faq-grid, .product-detail, .about-hero-grid, .contact-grid, .content-two-column, .catalog-hero-grid, .service-area-grid { grid-template-columns: 1fr; gap: 50px; }
    .catalog-hero-visual img { height: 460px; }
    .topic-grid, .topic-grid-featured { grid-template-columns: repeat(2, minmax(0, 1fr)); }
    .process-intro { position: static; }
    .factory-image img { height: 500px; }
    .special-cta { grid-template-columns: 64px 1fr; }
    .special-cta .button { grid-column: 2; justify-self: start; }
    .closing-grid, .compact-cta { grid-template-columns: 1fr; }
    .product-detail:nth-child(even) .product-detail-image { order: 0; }
    .statement-grid { gap: 60px 30px; }
    .decision-card { position: static; }
    .footer-grid { grid-template-columns: 1fr 1fr; }
    .footer-grid > div:first-child { grid-column: 1 / -1; }
    .mobile-contact-bar { position: fixed; z-index: 1001; right: 0; bottom: 0; left: 0; display: grid; grid-template-columns: repeat(3, 1fr); gap: 8px; padding: 9px max(12px, env(safe-area-inset-right)) calc(9px + env(safe-area-inset-bottom)) max(12px, env(safe-area-inset-left)); border-top: 1px solid var(--line); background: rgba(250,248,242,.98); box-shadow: 0 -8px 24px rgba(16,42,36,.08); }
    .mobile-contact-bar .button { min-height: 48px; padding: 10px; font-size: .82rem; }
}

@media (max-width: 640px) {
    .container { width: min(calc(100% - 28px), var(--container)); }
    .section { padding: 64px 0; }
    h1 { font-size: clamp(2.45rem, 13vw, 3.5rem); }
    h2 { font-size: clamp(1.85rem, 9vw, 2.6rem); }
    .brand-copy { display: flex; font-size: .62rem; }
    .brand-copy strong { font-size: .76rem; }
    .hero { padding-bottom: 55px; }
    .hero-copy { padding-top: 28px; }
    .hero-lead { font-size: 1.05rem; }
    .hero .button-row .button { width: 100%; }
    .hero-note { margin-top: 30px; }
    .hero-visual, .hero-visual img { min-height: 390px; height: 390px; }
    .hero-visual::before { right: 0; bottom: -8px; left: 8px; }
    .hero-badge { bottom: -1px; min-width: 190px; padding: 15px; }
    .hero-badge strong { font-size: 1.5rem; }
    .trust-grid > div { padding: 22px; }
    .product-grid, .application-grid, .quote-aside, .seo-content-grid, .commercial-link-grid { grid-template-columns: 1fr; }
    .commercial-grid, .benefit-grid, .solution-link-grid, .quote-data-list { grid-template-columns: 1fr; }
    .commercial-card { grid-template-columns: 1fr; }
    .commercial-card > img { min-height: 220px; height: 220px; }
    .benefit-grid article { min-height: auto; }
    .benefit-grid span { margin-bottom: 24px; }
    .product-image { height: 240px; }
    .product-content { padding: 25px; }
    .product-content > p:not(.product-type) { min-height: auto; }
    .process-list li { grid-template-columns: 50px 1fr; }
    .factory-image img { height: 390px; }
    .factory-image::after { top: -12px; right: 0; }
    .application-grid article { min-height: 220px; }
    .application-grid span { margin-bottom: 35px; }
    .special-cta { grid-template-columns: 1fr; padding: 26px; }
    .special-cta .button { grid-column: 1; width: 100%; }
    .faq-section { padding-top: 25px; }
    .closing-cta { padding: 55px 0; }
    .closing-grid .button { width: 100%; }
    .page-hero { padding: 70px 0; }
    .catalog-hero-visual img { height: 300px; }
    .product-detail-list { gap: 70px; }
    .product-detail-image, .product-detail-image img { min-height: 330px; height: 330px; }
    .statement-grid { grid-template-columns: 1fr; gap: 16px; }
    .statement-grid > div { margin-bottom: 45px; }
    .about-hero-grid img { height: 360px; }
    .contact-panel, .zalo-card { padding: 28px; }
    .contact-list div { grid-template-columns: 1fr; gap: 4px; }
    .quote-form { padding: 26px 20px; }
    .quote-form fieldset { grid-template-columns: 1fr; }
    .field-full, .dimension-intro { grid-column: 1; }
    .dimension-intro { grid-template-columns: 1fr; gap: 12px; }
    .dimension-intro img { max-width: 260px; }
    .topic-grid, .topic-grid-featured, .form-grid-four { grid-template-columns: 1fr; }
    .topic-grid article { min-height: auto; }
    .form-more > summary { align-items: flex-start; flex-direction: column; }
    .form-submit { flex-direction: column; align-items: stretch; }
    .form-submit .button { width: 100%; }
    .status-card { padding: 42px 22px; }
    .footer-grid { grid-template-columns: 1fr; gap: 40px; }
    .footer-grid > div:first-child { grid-column: auto; }
    .footer-bottom { flex-direction: column; gap: 12px; }
}

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