:root {
  --bg: #f5f3ef;
  --bg-alt: #ebe8e2;
  --ink: #161616;
  --muted: #64615c;
  --line: #d6d2ca;
  --accent: #8a5a2b;
  --dark: #1b1c1a;
  --wrap: 1200px;
}

* { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; scroll-padding-top: 72px; }
body {
  font-family: "Be Vietnam Pro", system-ui, sans-serif;
  font-weight: 400;
  font-size: 16px;
  line-height: 1.6;
  color: var(--ink);
  background: var(--bg);
  -webkit-font-smoothing: antialiased;
}
a { color: inherit; text-decoration: none; }
.wrap { max-width: var(--wrap); margin: 0 auto; padding: 0 32px; }

/* Header */
.site-header {
  position: sticky; top: 0; z-index: 10;
  background: rgba(245, 243, 239, 0.94);
  border-bottom: 1px solid var(--line);
  backdrop-filter: blur(6px);
}
.header-inner { display: flex; align-items: center; justify-content: space-between; height: 68px; gap: 24px; }
.brand { display: flex; flex-direction: column; line-height: 1.1; }
.brand-mark { font-weight: 600; letter-spacing: 0.18em; font-size: 15px; }
.brand-sub { font-size: 11px; color: var(--muted); letter-spacing: 0.08em; margin-top: 3px; }
.nav { display: flex; gap: 32px; font-size: 14px; color: var(--muted); }
.nav a:hover { color: var(--ink); }

/* Buttons */
.btn {
  display: inline-block;
  background: var(--ink); color: #fff;
  padding: 14px 26px; font-size: 14px; font-weight: 500;
  border: 1px solid var(--ink);
  transition: background .2s, color .2s;
}
.btn:hover { background: var(--accent); border-color: var(--accent); }
.btn-small { padding: 9px 18px; font-size: 13px; }
.btn-ghost { background: transparent; color: var(--ink); }
.btn-ghost:hover { background: var(--ink); color: #fff; border-color: var(--ink); }
.link-arrow { font-size: 14px; font-weight: 500; border-bottom: 1px solid var(--ink); padding-bottom: 2px; }
.link-arrow::after { content: " →"; }

/* Type */
.eyebrow { font-size: 12px; letter-spacing: 0.12em; text-transform: uppercase; color: var(--muted); margin-bottom: 20px; }
h1, h2 { text-wrap: balance; }
h1 { font-size: clamp(38px, 5vw, 64px); font-weight: 500; line-height: 1.08; letter-spacing: -0.025em; }
h2 { font-size: clamp(28px, 3.2vw, 40px); font-weight: 500; line-height: 1.15; letter-spacing: -0.02em; }
h3 { font-size: 18px; font-weight: 600; letter-spacing: -0.01em; }
.lead { font-size: 18px; color: var(--muted); max-width: 520px; margin-top: 28px; font-weight: 300; }

/* Hero */
.hero { padding: 96px 0 0; }
.hero-grid { display: grid; grid-template-columns: 1.05fr 1fr; gap: 64px; align-items: center; }
.hero-actions { display: flex; align-items: center; gap: 32px; margin-top: 40px; }
.hero-drawing { color: var(--ink); }
.hero-drawing svg { width: 100%; height: auto; display: block; }
.accent-stroke { stroke: var(--accent); }
.dim { stroke: var(--muted); }
.dim-text, .caption-text { fill: var(--muted); stroke: none; font-family: inherit; font-size: 11px; letter-spacing: 0.08em; }
.cut { fill: var(--bg); }

.facts { list-style: none; display: grid; grid-template-columns: repeat(4, 1fr); border-top: 1px solid var(--line); margin-top: 96px; }
.facts li { padding: 28px 24px 32px 0; border-right: 1px solid var(--line); margin-right: 24px; }
.facts li:last-child { border-right: 0; margin-right: 0; }
.facts strong { display: block; font-weight: 600; font-size: 15px; }
.facts span { font-size: 14px; color: var(--muted); }

/* Sections */
.section { padding: 120px 0; border-top: 1px solid var(--line); }
.section-alt { background: var(--bg-alt); }
.section-head { display: grid; grid-template-columns: 120px 1fr; gap: 24px; margin-bottom: 64px; }
.section-no { font-size: 13px; color: var(--accent); font-weight: 500; padding-top: 10px; letter-spacing: 0.08em; }
.section-intro { color: var(--muted); max-width: 620px; margin-top: 16px; font-size: 17px; font-weight: 300; }

.grid-4 { display: grid; grid-template-columns: repeat(4, 1fr); gap: 0; margin-left: 144px; border-top: 1px solid var(--ink); }
.point { padding: 28px 28px 0 0; }
.point h3 { margin-bottom: 12px; }
.point p { color: var(--muted); font-size: 15px; }

/* Products */
.product { display: grid; grid-template-columns: 1fr 1fr; gap: 72px; align-items: center; margin-left: 144px; }
.product + .product { margin-top: 96px; }
.product-rev .photo { order: 2; }
.product-body h3 { font-size: 28px; font-weight: 500; letter-spacing: -0.02em; margin-bottom: 16px; }
.product-body > p { color: var(--muted); }
.product-body .eyebrow { margin-bottom: 12px; }
.spec { margin-top: 32px; border-top: 1px solid var(--line); }
.spec div { display: grid; grid-template-columns: 130px 1fr; padding: 12px 0; border-bottom: 1px solid var(--line); font-size: 15px; }
.spec dt { color: var(--muted); }

/* Placeholders */
.ph {
  position: relative; aspect-ratio: 4 / 3;
  background:
    repeating-linear-gradient(135deg, transparent 0 11px, rgba(0,0,0,0.045) 11px 12px),
    #dcd8d0;
}
.ph::after {
  content: attr(data-label);
  position: absolute; left: 16px; bottom: 14px;
  font-size: 12px; letter-spacing: 0.06em; color: var(--muted);
}
.tbd { color: var(--accent); font-style: italic; }

/* Table */
.table-wrap { margin-left: 144px; overflow-x: auto; }
.spec-table { width: 100%; border-collapse: collapse; font-size: 15px; font-variant-numeric: tabular-nums; }
.spec-table th { text-align: left; font-weight: 500; font-size: 12px; letter-spacing: 0.1em; text-transform: uppercase; color: var(--muted); padding: 0 16px 14px 0; border-bottom: 1px solid var(--ink); }
.spec-table td { padding: 18px 16px 18px 0; border-bottom: 1px solid var(--line); white-space: nowrap; }
.spec-table td:first-child { color: var(--muted); font-size: 13px; }
.spec-table td:nth-child(2) { font-weight: 600; }
.spec-table tbody tr:hover { background: var(--bg-alt); }
.note { margin: 28px 0 0 144px; color: var(--muted); font-size: 15px; }

/* Dark process */
.section-dark { background: var(--dark); color: #ecebe7; border-top: 0; }
.section-dark .section-intro { color: #a3a19b; }
.section-dark .section-no { color: #c99a68; }
.steps { list-style: none; display: grid; grid-template-columns: repeat(3, 1fr); margin-left: 144px; border-top: 1px solid #3a3b38; }
.steps li { padding: 32px 32px 40px 0; border-bottom: 1px solid #3a3b38; }
.steps span { font-size: 12px; color: #c99a68; letter-spacing: 0.1em; }
.steps h3 { margin: 14px 0 10px; font-weight: 500; font-size: 20px; }
.steps p { color: #a3a19b; font-size: 15px; max-width: 280px; }

/* Gallery */
.gallery { display: grid; grid-template-columns: repeat(4, 1fr); gap: 12px; margin-left: 144px; }
.gallery .g-wide { grid-column: span 2; grid-row: span 2; aspect-ratio: auto; }
.numbers { list-style: none; display: grid; grid-template-columns: repeat(4, 1fr); margin: 56px 0 0 144px; border-top: 1px solid var(--line); }
.numbers li { padding-top: 24px; }
.numbers strong { display: block; font-size: 40px; font-weight: 500; letter-spacing: -0.02em; }
.numbers span { color: var(--muted); font-size: 14px; }

/* Contact */
.contact { background: var(--bg-alt); }
.contact-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 96px; align-items: start; }
.checklist { list-style: none; margin-top: 28px; }
.checklist li { padding: 12px 0; border-bottom: 1px solid var(--line); font-size: 15px; }
.checklist li::before { content: "—"; color: var(--accent); margin-right: 14px; }
.contact-card { background: var(--bg); padding: 44px; border: 1px solid var(--line); }
.company { font-weight: 600; font-size: 18px; margin-bottom: 24px; }
.contact-card dl div { display: grid; grid-template-columns: 120px 1fr; padding: 12px 0; border-bottom: 1px solid var(--line); font-size: 15px; }
.contact-card dt { color: var(--muted); }
.contact-card dd a { border-bottom: 1px solid var(--ink); }
.contact-actions { display: flex; gap: 12px; margin-top: 32px; flex-wrap: wrap; }

/* Footer */
.site-footer { background: var(--dark); color: #a3a19b; padding: 56px 0; font-size: 14px; }
.footer-inner { display: flex; justify-content: space-between; align-items: end; gap: 32px; flex-wrap: wrap; }
.site-footer .brand-mark { color: #ecebe7; display: block; margin-bottom: 14px; }

/* Responsive */
@media (max-width: 960px) {
  .nav { display: none; }
  .hero { padding-top: 56px; }
  .hero-grid, .product, .contact-grid { grid-template-columns: 1fr; gap: 40px; }
  .product-rev .photo { order: 0; }
  .section { padding: 80px 0; }
  .section-head { grid-template-columns: 1fr; gap: 8px; margin-bottom: 40px; }
  .section-no { padding-top: 0; }
  .grid-4, .product, .table-wrap, .steps, .gallery, .numbers { margin-left: 0; }
  .note { margin-left: 0; }
  .grid-4 { grid-template-columns: 1fr 1fr; }
  .steps { grid-template-columns: 1fr 1fr; }
  .facts { grid-template-columns: 1fr 1fr; margin-top: 56px; }
  .facts li:nth-child(2) { border-right: 0; margin-right: 0; }
  .facts li:nth-child(-n+2) { border-bottom: 1px solid var(--line); }
  .facts li { padding-left: 0; }
  .numbers { grid-template-columns: 1fr 1fr; gap: 0 24px; }
}
@media (max-width: 600px) {
  .wrap { padding: 0 20px; }
  .grid-4, .steps { grid-template-columns: 1fr; }
  .point { padding-right: 0; padding-bottom: 8px; }
  .hero-actions { flex-direction: column; align-items: flex-start; gap: 20px; }
  .gallery { grid-template-columns: 1fr 1fr; }
  .contact-card { padding: 28px 22px; }
  .contact-card dl div, .spec div { grid-template-columns: 100px 1fr; }
}

.ph img { position: absolute; inset: 0; width: 100%; height: 100%; object-fit: cover; display: block; }
.ph:has(img)::after { content: none; }
.ph:has(img) { background: #cfcac1; }

.note-inline { margin-top: 28px; color: var(--muted); font-size: 15px; }

/* Certification */
.origin { display: grid; grid-template-columns: 1.1fr 1fr; gap: 72px; align-items: center; margin-left: 144px; }
.origin-photo { aspect-ratio: 5 / 4; }
.origin-body .spec { margin-top: 0; }
.origin-note { color: var(--muted); margin-top: 28px; font-size: 15px; }
.certs { display: grid; grid-template-columns: repeat(3, 1fr); gap: 40px; margin: 96px 0 0 144px; }
.cert-doc {
  aspect-ratio: 3 / 4; background: #fff; border: 1px solid var(--line);
  position: relative; margin-bottom: 24px;
  background-image:
    linear-gradient(var(--line), var(--line)),
    repeating-linear-gradient(to bottom, transparent 0 14px, #ece9e3 14px 15px);
  background-size: 40% 2px, 70% 60%;
  background-position: 50% 14%, 50% 62%;
  background-repeat: no-repeat;
}
.cert-doc span { position: absolute; left: 0; right: 0; bottom: 16px; text-align: center; font-size: 12px; color: var(--muted); letter-spacing: 0.04em; }
.cert .eyebrow { margin-bottom: 8px; }
.cert h3 { margin-bottom: 10px; }
.cert p { color: var(--muted); font-size: 15px; }
.cert .cert-code { margin-top: 14px; font-size: 14px; color: var(--ink); }
@media (max-width: 960px) {
  .origin { grid-template-columns: 1fr; gap: 40px; margin-left: 0; }
  .certs { grid-template-columns: 1fr 1fr; margin-left: 0; margin-top: 64px; }
}
@media (max-width: 600px) {
  .certs { grid-template-columns: 1fr; }
  .cert-doc { max-width: 280px; }
}

/* Hero photo + drawing moved to specs */
.hero-photo { margin: 0; aspect-ratio: 4 / 5; overflow: hidden; background: #cfcac1; }
.hero-photo img { width: 100%; height: 100%; object-fit: cover; display: block; }
.hero-grid { align-items: stretch; }
.hero-text { align-self: center; }
.spec-drawing { margin: 0 0 56px 144px; max-width: 560px; color: var(--ink); }
.spec-drawing svg { width: 100%; height: auto; display: block; }
@media (max-width: 960px) {
  .hero-photo { aspect-ratio: 4 / 3; }
  .spec-drawing { margin-left: 0; }
}

/* Floor gallery strip */
.floor-strip { display: grid; grid-template-columns: repeat(4, 1fr); gap: 12px; margin: 56px 0 0 144px; }
.floor-strip figure { margin: 0; }
.floor-strip .ph { aspect-ratio: 3 / 4; }
.floor-strip figcaption { font-size: 13px; color: var(--muted); margin-top: 10px; }
.product-rev { margin-top: 96px; }
@media (max-width: 960px) { .floor-strip { margin-left: 0; grid-template-columns: 1fr 1fr; } }

/* Floor spec table */
.spec-table tr.group td { padding: 28px 0 10px; font-weight: 600; font-size: 13px; letter-spacing: 0.06em; text-transform: uppercase; color: var(--accent); border-bottom: 1px solid var(--ink); background: none; }
.spec-table tbody tr.group:hover { background: none; }
.floor-table td:nth-child(2) { font-weight: 600; }
.spec-link { display: inline-block; margin-top: 28px; }

/* Map */
.map { margin-top: 64px; position: relative; }
.map iframe { width: 100%; height: 420px; border: 1px solid var(--line); display: block; filter: grayscale(0.35); }
.map-link { display: inline-block; margin-top: 18px; }
@media (max-width: 600px) { .map iframe { height: 300px; } }

/* Floating contact */
.float-contact { position: fixed; right: 24px; bottom: 24px; z-index: 50; display: flex; flex-direction: column; gap: 14px; }
.fc-btn { position: relative; width: 56px; height: 56px; border-radius: 50%; display: flex; align-items: center; justify-content: center; color: #fff; box-shadow: 0 6px 18px rgba(0,0,0,0.18); }
.fc-zalo { background: #0068ff; }
.fc-call { background: var(--accent); }
.fc-text { font-weight: 600; font-size: 14px; letter-spacing: 0.02em; position: relative; }
.fc-btn svg { position: relative; animation: fc-ring 2.4s ease-in-out infinite; }
.fc-pulse { position: absolute; inset: 0; border-radius: 50%; background: inherit; animation: fc-pulse 1.8s ease-out infinite; z-index: -1; }
.fc-call .fc-pulse { animation-delay: .9s; }
.fc-label { position: absolute; right: 68px; white-space: nowrap; background: var(--ink); color: #fff; font-size: 13px; padding: 7px 12px; opacity: 0; transform: translateX(6px); transition: opacity .2s, transform .2s; pointer-events: none; }
.fc-btn:hover .fc-label { opacity: 1; transform: none; }
@keyframes fc-pulse { 0% { transform: scale(1); opacity: .55; } 100% { transform: scale(1.7); opacity: 0; } }
@keyframes fc-ring { 0%, 70%, 100% { transform: rotate(0); } 75% { transform: rotate(-14deg); } 80% { transform: rotate(14deg); } 85% { transform: rotate(-10deg); } 90% { transform: rotate(8deg); } }
@media (max-width: 600px) { .float-contact { right: 16px; bottom: 16px; } .fc-btn { width: 52px; height: 52px; } }
@media (prefers-reduced-motion: reduce) { .fc-pulse, .fc-btn svg { animation: none; } }

/* OEM */
.oem { display: grid; grid-template-columns: 1fr 1fr; gap: 72px; margin-left: 144px; }
.oem-col .eyebrow { margin-bottom: 8px; }
.oem-list { list-style: none; border-top: 1px solid var(--ink); }
.oem-list li { padding: 20px 0; border-bottom: 1px solid var(--line); }
.oem-list strong { display: block; font-weight: 600; margin-bottom: 4px; }
.oem-list span { color: var(--muted); font-size: 15px; }
.oem-steps { list-style: none; border-top: 1px solid var(--ink); }
.oem-steps li { display: grid; grid-template-columns: 44px 1fr; padding: 18px 0; border-bottom: 1px solid var(--line); font-size: 15px; }
.oem-steps span { color: var(--accent); font-size: 13px; letter-spacing: 0.08em; padding-top: 2px; }
.oem-cta { margin-top: 32px; }
@media (max-width: 960px) { .oem { grid-template-columns: 1fr; gap: 48px; margin-left: 0; } }

/* C/O support */
.co { margin: 96px 0 0 144px; border-top: 1px solid var(--ink); padding-top: 40px; display: grid; grid-template-columns: 1fr 1.4fr; gap: 72px; }
.co-head .eyebrow { margin-bottom: 10px; }
.co-head h3 { font-size: 26px; font-weight: 500; letter-spacing: -0.02em; margin-bottom: 14px; }
.co-head p { color: var(--muted); }
.co-cols { display: grid; grid-template-columns: 1fr 1fr; gap: 40px; }
.co-label { font-size: 12px; letter-spacing: 0.1em; text-transform: uppercase; color: var(--muted); margin-bottom: 8px; }
.co-list, .co-forms { list-style: none; }
.co-list li { padding: 12px 0; border-bottom: 1px solid var(--line); font-size: 15px; }
.co-forms li { display: flex; justify-content: space-between; gap: 16px; padding: 12px 0; border-bottom: 1px solid var(--line); font-size: 15px; }
.co-forms strong { font-weight: 600; }
.co-forms span { color: var(--muted); text-align: right; }
@media (max-width: 960px) { .co { grid-template-columns: 1fr; gap: 40px; margin-left: 0; margin-top: 64px; } }
@media (max-width: 600px) { .co-cols { grid-template-columns: 1fr; } }

.co { grid-template-columns: 1fr; gap: 36px; }
.co-head { max-width: 640px; }
.co-cols { gap: 56px; }
.co-forms strong { white-space: nowrap; }


.co-line { margin-top: 20px; padding-top: 20px; border-top: 1px solid var(--line); font-size: 15px; font-weight: 500; }