:root {
  --ink: #15130f;
  --ink-soft: #2c2820;
  --paper: #fbf7ec;
  --cream: #f2e9d3;
  --yellow: #f5b913;
  --yellow-deep: #cf9704;
  --text: #221f19;
  --muted: #6c655a;
  --line: rgba(21, 19, 15, 0.14);
  --radius: 18px;
  --wrap: 1160px;
  --shadow: 0 10px 30px rgba(21, 19, 15, 0.09);
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  background: radial-gradient(circle at 88% -10%, #fbe7ae 0%, transparent 46%), var(--paper);
  color: var(--text);
  font-family: "Be Vietnam Pro", system-ui, -apple-system, "Segoe UI", sans-serif;
  font-size: 17px;
  line-height: 1.62;
  -webkit-font-smoothing: antialiased;
}

img { display: block; max-width: 100%; }

a { color: inherit; }

h1, h2, h3 {
  font-family: "Be Vietnam Pro", system-ui, sans-serif;
  font-weight: 800;
  letter-spacing: -0.02em;
  line-height: 1.12;
  margin: 0 0 14px;
  text-wrap: balance;
}

h1 { font-size: clamp(1.95rem, 8.2vw, 3.5rem); }
h2 { font-size: clamp(1.55rem, 5.4vw, 2.4rem); }
h3 { font-size: 1.08rem; font-weight: 700; letter-spacing: -0.01em; }

p { margin: 0 0 14px; }

.wrap {
  width: 100%;
  max-width: var(--wrap);
  margin-inline: auto;
  padding-inline: 20px;
}

.eyebrow {
  font-family: "Archivo", "Be Vietnam Pro", sans-serif;
  font-weight: 700;
  font-size: 0.74rem;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--yellow-deep);
  margin: 0 0 10px;
}

.muted { color: var(--muted); }

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  min-height: 52px;
  padding: 13px 22px;
  border-radius: 999px;
  font-weight: 700;
  font-size: 1rem;
  text-decoration: none;
  border: 2px solid transparent;
  transition: transform 0.15s ease, background-color 0.15s ease, box-shadow 0.15s ease;
}

.btn-call {
  background: var(--yellow);
  color: var(--ink);
  box-shadow: 0 6px 0 rgba(207, 151, 4, 0.35);
}

.btn-call:hover { background: #ffc92c; transform: translateY(-1px); }

.btn-ghost {
  background: transparent;
  color: var(--text);
  border-color: var(--line);
}

.band-ink .btn-ghost,
.band-dark .btn-ghost {
  color: var(--paper);
  border-color: rgba(251, 247, 236, 0.34);
}

.btn-ghost:hover { border-color: var(--ink); }

.btn-sm {
  min-height: 44px;
  padding: 8px 16px;
  font-size: 0.88rem;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 40;
  background: rgba(251, 247, 236, 0.94);
  backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--line);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  min-height: 64px;
}

.wordmark {
  display: inline-flex;
  align-items: baseline;
  gap: 8px;
  text-decoration: none;
}

.wordmark-vcc {
  font-family: "Archivo", "Be Vietnam Pro", sans-serif;
  font-weight: 800;
  font-size: 1.5rem;
  letter-spacing: -0.02em;
  color: var(--ink);
}

.inline-link {
  color: inherit;
  text-decoration: underline;
  text-decoration-color: var(--yellow-deep);
  text-decoration-thickness: 2px;
  text-underline-offset: 2px;
}

.table-note { font-size: 0.8rem; color: var(--muted); margin: 10px 0 0; }

.band-dark .inline-link, .band-ink .inline-link { text-decoration-color: var(--yellow); }

.wordmark-sub {
  font-family: "Archivo", "Be Vietnam Pro", sans-serif;
  font-weight: 700;
  font-size: 0.8rem;
  letter-spacing: 0.12em;
}

.header-nav { display: none; }

.header-nav a {
  text-decoration: none;
  font-size: 0.94rem;
  font-weight: 500;
  color: var(--ink-soft);
  padding: 6px 2px;
  border-bottom: 2px solid transparent;
}

.header-nav a:hover { border-bottom-color: var(--yellow); }

.site-header.is-scrolled { box-shadow: 0 6px 18px rgba(21, 19, 15, 0.08); }

.reveal {
  opacity: 0;
  transform: translateY(14px);
  transition: opacity 0.5s ease, transform 0.5s ease;
}

.reveal.is-visible { opacity: 1; transform: none; }

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .reveal { opacity: 1; transform: none; transition: none; }
  .btn { transition: none; }
}

.hero {
  position: relative;
  padding: 30px 0 40px;
  overflow: hidden;
}

.hero::before {
  content: "";
  position: absolute;
  inset: -40% -10% auto auto;
  width: 62%;
  height: 150%;
  background: repeating-linear-gradient(
    45deg,
    rgba(245, 185, 19, 0.5) 0 10px,
    rgba(245, 185, 19, 0) 10px 34px
  );
  pointer-events: none;
  mask-image: linear-gradient(200deg, #000 0%, transparent 62%);
  -webkit-mask-image: linear-gradient(200deg, #000 0%, transparent 62%);
}

.hero-grid {
  position: relative;
  display: grid;
  gap: 26px;
}

.hero-copy .lead {
  font-size: 1.05rem;
  color: var(--ink-soft);
  max-width: 46ch;
}

.price-box {
  display: flex;
  align-items: baseline;
  gap: 12px;
  margin: 18px 0 20px;
  padding: 12px 0 12px 16px;
  border-left: 4px solid var(--yellow);
}

.price {
  font-family: "Archivo", "Be Vietnam Pro", sans-serif;
  font-size: clamp(1.9rem, 8vw, 2.6rem);
  font-weight: 800;
  letter-spacing: -0.02em;
  line-height: 1;
}

.price-unit { font-size: 0.88rem; line-height: 1.35; color: var(--muted); }

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.proof {
  margin: 16px 0 0;
  font-size: 0.86rem;
  color: var(--muted);
  max-width: 44ch;
}

.hero-media { position: relative; }

.hero-photo,
.hero-photo-sm,
figure { margin: 0; }

.hero-photo {
  aspect-ratio: 4 / 3;
  border-radius: var(--radius);
  overflow: hidden;
  box-shadow: var(--shadow);
  background: var(--cream);
}

.hero-photo img,
.hero-photo-sm img { width: 100%; height: 100%; object-fit: cover; }

.hero-photo-sm {
  position: absolute;
  right: -4px;
  bottom: -22px;
  width: 32%;
  aspect-ratio: 1 / 1;
  border-radius: 14px;
  overflow: hidden;
  border: 4px solid var(--paper);
  box-shadow: var(--shadow);
}

.facts {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 10px;
  list-style: none;
  margin: 46px 0 0;
  padding: 0;
}

.facts li {
  background: #fff;
  border: 1px solid var(--line);
  border-radius: 14px;
  padding: 12px 14px;
}

.facts strong {
  display: block;
  font-family: "Archivo", "Be Vietnam Pro", sans-serif;
  font-size: 1rem;
  letter-spacing: -0.01em;
}

.facts span { font-size: 0.8rem; color: var(--muted); line-height: 1.35; }

.band { padding: 62px 0; }

.band-cream { background: var(--cream); }
.band-ink { background: var(--ink); color: var(--paper); }
.band-dark { background: #1d1a14; color: var(--paper); }
.band-form { background: var(--yellow); color: var(--ink); }

.band-ink .eyebrow, .band-dark .eyebrow { color: var(--yellow); }
.band-form .eyebrow { color: var(--ink-soft); }

.section-head { max-width: 62ch; margin-bottom: 26px; }

.section-lead { color: var(--muted); font-size: 1rem; }

.band-ink .section-lead,
.band-dark .section-lead { color: rgba(251, 247, 236, 0.74); }

.band-form .section-lead { color: var(--ink-soft); }

.cards {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 12px;
}

.card {
  background: #fff;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  overflow: hidden;
  display: flex;
  flex-direction: column;
}

.card figure {
  aspect-ratio: 16 / 11;
  overflow: hidden;
  background: var(--cream);
}

.card figure img { width: 100%; height: 100%; object-fit: cover; }

.card h3 { margin: 12px 12px 6px; font-size: 0.98rem; }

.card p { margin: 0 12px 14px; font-size: 0.86rem; color: var(--muted); line-height: 1.5; }

.why-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 12px;
}

.why-list li {
  border: 1px solid rgba(251, 247, 236, 0.16);
  border-radius: var(--radius);
  padding: 18px;
  background: rgba(251, 247, 236, 0.03);
}

.why-list h3 { color: var(--yellow); font-size: 1rem; margin-bottom: 8px; }

.why-list p { margin: 0; font-size: 0.92rem; color: rgba(251, 247, 236, 0.82); }

.detail-grid { display: grid; gap: 26px; }

.spec-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.9rem;
  background: #fff;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  overflow: hidden;
}

.spec-table caption {
  caption-side: top;
  text-align: left;
  font-family: "Archivo", "Be Vietnam Pro", sans-serif;
  font-size: 0.76rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--muted);
  padding: 0 0 8px;
}

.spec-table th,
.spec-table td {
  text-align: left;
  padding: 11px 14px;
  border-bottom: 1px solid var(--line);
  vertical-align: top;
}

.spec-table tr:last-child th,
.spec-table tr:last-child td { border-bottom: 0; }

.spec-table th {
  font-weight: 600;
  color: var(--muted);
  width: 46%;
  font-size: 0.86rem;
}

.spec-table td { font-weight: 600; color: var(--ink); }

.detail-gallery {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 10px;
}

.detail-gallery figure {
  border-radius: 14px;
  overflow: hidden;
  border: 1px solid var(--line);
  background: #fff;
}

.detail-gallery img { width: 100%; height: 100%; aspect-ratio: 4 / 3; object-fit: cover; }

.detail-gallery figcaption {
  font-size: 0.76rem;
  color: var(--muted);
  padding: 8px 10px 10px;
  line-height: 1.4;
}

.steps {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 12px;
}

.steps li {
  background: #fff;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 16px 18px;
}

.step-num {
  font-family: "Archivo", "Be Vietnam Pro", sans-serif;
  font-weight: 800;
  font-size: 0.8rem;
  letter-spacing: 0.1em;
  color: var(--yellow-deep);
  display: block;
  margin-bottom: 6px;
}

.steps h3 { font-size: 1rem; margin-bottom: 6px; }

.steps p { margin: 0; font-size: 0.9rem; color: var(--muted); }

.limit {
  margin: 18px 0 0;
  padding: 14px 16px;
  border: 1px dashed rgba(21, 19, 15, 0.28);
  border-radius: 14px;
  font-size: 0.88rem;
  color: var(--ink-soft);
  max-width: 70ch;
}

.faq-list { display: grid; gap: 10px; }

.faq-list details {
  background: #fff;
  border: 1px solid var(--line);
  border-radius: 14px;
  padding: 14px 16px;
}

.faq-list summary {
  cursor: pointer;
  font-weight: 700;
  font-size: 0.98rem;
  list-style: none;
  display: flex;
  gap: 10px;
  align-items: flex-start;
}

.faq-list summary::-webkit-details-marker { display: none; }

.faq-list summary::after {
  content: "+";
  margin-left: auto;
  font-family: "Archivo", sans-serif;
  font-weight: 700;
  color: var(--yellow-deep);
}

.faq-list details[open] summary::after { content: "−"; }

.faq-list p { margin: 10px 0 0; font-size: 0.92rem; color: var(--muted); }

.contact-grid { display: grid; gap: 26px; }

.contact-list {
  list-style: none;
  margin: 0 0 22px;
  padding: 0;
  display: grid;
  gap: 14px;
}

.contact-list .label {
  display: block;
  font-family: "Archivo", "Be Vietnam Pro", sans-serif;
  font-size: 0.72rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--yellow);
  margin-bottom: 2px;
}

.contact-list .value { font-size: 0.96rem; color: rgba(251, 247, 236, 0.9); }

.map-box {
  border-radius: var(--radius);
  overflow: hidden;
  border: 1px solid rgba(251, 247, 236, 0.2);
  background: rgba(251, 247, 236, 0.04);
}

.map-box iframe {
  display: block;
  width: 100%;
  height: 260px;
  border: 0;
}

.map-link {
  display: block;
  padding: 12px 14px;
  font-size: 0.86rem;
  font-weight: 600;
  text-decoration: none;
  color: var(--paper);
  border-top: 1px solid rgba(251, 247, 236, 0.18);
}

.form-grid { display: grid; gap: 22px; align-items: start; }

.form-embed {
  background: var(--paper);
  border-radius: var(--radius);
  padding: 18px;
  box-shadow: var(--shadow);
  border: 1px solid rgba(21, 19, 15, 0.1);
}

.form-embed p { margin: 0; font-size: 0.9rem; color: var(--muted); }

.site-footer {
  background: var(--ink);
  color: rgba(251, 247, 236, 0.8);
  padding: 42px 0 96px;
  font-size: 0.88rem;
}

.footer-inner { display: grid; gap: 20px; }

.footer-wordmark { margin-bottom: 8px; color: var(--paper); }
.footer-wordmark .wordmark-vcc { color: var(--paper); }

.site-footer a { color: var(--paper); }

.footer-note {
  margin: 22px auto 0;
  font-size: 0.76rem;
  color: rgba(251, 247, 236, 0.5);
  border-top: 1px solid rgba(251, 247, 236, 0.14);
  padding-top: 16px;
}

.mobile-bar {
  position: fixed;
  left: 0;
  right: 0;
  bottom: 0;
  z-index: 50;
  display: flex;
  gap: 8px;
  padding: 8px 10px calc(8px + env(safe-area-inset-bottom));
  background: rgba(21, 19, 15, 0.97);
  border-top: 1px solid rgba(251, 247, 236, 0.14);
}

.mobile-bar a {
  flex: 1;
  min-height: 48px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 12px;
  font-size: 0.88rem;
  font-weight: 700;
  text-decoration: none;
  text-align: center;
}

.mb-call { background: var(--yellow); color: var(--ink); flex: 1.5; }
.mb-zalo { background: rgba(251, 247, 236, 0.12); color: var(--paper); }
.mb-map { background: transparent; color: var(--paper); border: 1px solid rgba(251, 247, 236, 0.3); }

@media (min-width: 700px) {
  body { font-size: 18px; }
  .band { padding: 78px 0; }
  .hero { padding: 46px 0 54px; }
  .facts { grid-template-columns: repeat(4, 1fr); }
  .cards { grid-template-columns: repeat(2, 1fr); gap: 14px; }
  .why-list { grid-template-columns: 1fr 1fr; }
  .steps { grid-template-columns: 1fr 1fr; }
  .detail-gallery { gap: 12px; }
  .contact-grid { grid-template-columns: 1fr 1fr; align-items: start; }
  .map-box iframe { height: 340px; }
  .form-grid { grid-template-columns: 1fr 1fr; gap: 34px; }
  .footer-inner { grid-template-columns: 1.4fr 1fr; gap: 30px; }
}

@media (min-width: 980px) {
  .header-nav { display: flex; gap: 24px; align-items: center; }
  .mobile-bar { display: none; }
  .site-footer { padding-bottom: 46px; }
  .band { padding: 96px 0; }
  .hero { padding: 62px 0 76px; }
  .hero-grid {
    grid-template-columns: 1.05fr 0.95fr;
    gap: 56px;
    align-items: center;
  }
  .hero-photo { aspect-ratio: 4 / 3.1; }
  .hero-photo-sm { width: 27%; bottom: -34px; right: -22px; }
  .facts { margin-top: 60px; gap: 14px; }
  .cards { grid-template-columns: repeat(4, 1fr); }
  .why-list { grid-template-columns: repeat(4, 1fr); }
  .steps { grid-template-columns: repeat(4, 1fr); }
  .detail-grid { grid-template-columns: 1.06fr 0.94fr; gap: 46px; align-items: start; }
  .detail-gallery { grid-template-columns: 1fr; gap: 12px; }
  .detail-gallery img { aspect-ratio: 16 / 9; }
  .faq-wrap { display: grid; grid-template-columns: 0.75fr 1.25fr; gap: 40px; align-items: start; }
  .faq-list details { padding: 16px 20px; }
  .hero-copy .lead { font-size: 1.1rem; }
}