@import url('https://fonts.googleapis.com/css2?family=Inter:wght@400;500;600;700&family=Plus+Jakarta+Sans:wght@500;600;700;800&family=Roboto+Mono:wght@400;500;600&subset=vietnamese,latin-ext&display=swap');

:root{
  --ink:#12142B;
  --ink-soft:#3A3D57;
  --paper:#F2F3EE;
  --surface:#FFFFFF;
  --line: rgba(18,20,43,0.12);
  --line-strong: rgba(18,20,43,0.22);
  --indigo:#4C4FF6;
  --indigo-deep:#2F32B8;
  --lime:#D6FF3D;
  --muted:#63667C;

  --c-ztool:#3A7BFF;   --c-ztool-d:#1E4FCC;
  --c-spa:#2FB799;     --c-spa-d:#1D8570;
  --c-kcn:#FF6F5C;     --c-kcn-d:#D8402E;
  --c-icham:#9457FF;   --c-icham-d:#6425C9;
  --c-qr:#12142B;      --c-qr-d:#2B2E4A;

  --display: 'Plus Jakarta Sans', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  --body: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  --mono: 'Roboto Mono', 'SFMono-Regular', Consolas, monospace;
}

*{box-sizing:border-box;}
html{
  scroll-behavior:smooth;
  overflow-x:hidden;
}
@media (prefers-reduced-motion: reduce){
  html{scroll-behavior:auto;}
  *{animation-duration:0.001ms !important; animation-iteration-count:1 !important; transition-duration:0.001ms !important;}
}

::selection{ background:var(--lime); color:var(--ink); }

body{
  margin:0;
  background:var(--paper);
  color:var(--ink);
  font-family:var(--body);
  font-size:16px;
  line-height:1.65;
  -webkit-font-smoothing:antialiased;
  -moz-osx-font-smoothing:grayscale;
  text-rendering:optimizeLegibility;
  position:relative;
  overflow-x:hidden;
}

body::before{
  content:"";
  position:fixed; inset:0; z-index:200; pointer-events:none;
  opacity:0.035; mix-blend-mode:multiply;
  background-image:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='120' height='120'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='2' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)'/%3E%3C/svg%3E");
}

h1,h2,h3,h4{
  font-family:var(--display);
  margin:0;
  line-height:1.25;
  letter-spacing:-0.005em;
  font-weight:700;
}

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

.wrap{
  max-width:1200px;
  margin:0 auto;
  padding:0 32px;
}
@media (max-width:640px){ .wrap{ padding:0 20px; } }

::-webkit-scrollbar{ width:11px; }
::-webkit-scrollbar-track{ background:var(--paper); }
::-webkit-scrollbar-thumb{ background:var(--line-strong); border-radius:8px; border:3px solid var(--paper); }

header{
  position:sticky; top:0; z-index:100;
  background:rgba(242,243,238,0.88);
  backdrop-filter:blur(14px) saturate(140%);
  border-bottom:1px solid var(--line);
  transition:all 0.3s ease;
}
header.header-scrolled{
  background:rgba(255,255,255,0.96);
  box-shadow:0 4px 20px rgba(18,20,43,0.06);
  border-bottom-color:transparent;
}
.nav{
  display:flex; align-items:center; justify-content:space-between;
  padding:14px 32px;
  max-width:1200px; margin:0 auto;
}
.brand{
  display:flex; align-items:center; gap:12px;
  text-decoration:none;
}
.brand-logo{
  height:44px;
  width:auto;
  max-width:180px;
  object-fit:contain;
  display:block;
  transition:transform 0.3s ease;
}
.brand:hover .brand-logo{
  transform:scale(1.03);
}

.nav-right{
  display:flex; align-items:center; gap:14px;
}
.nav-right .btn-primary{
  display:none;
}
@media (min-width:860px){
  .nav-right .btn-primary{ display:inline-flex; }
}

/* Nút chuyển đổi ngôn ngữ EN / VI (Luôn hiển thị trên Header) */
.lang-switcher{
  display:inline-flex;
  align-items:center;
  background:rgba(18,20,43,0.06);
  border:1px solid var(--line);
  border-radius:24px;
  padding:3px;
  position:relative;
  user-select:none;
  flex-shrink:0;
}
.lang-btn{
  border:none;
  background:transparent;
  font-family:var(--body);
  font-size:12px;
  font-weight:600;
  padding:4px 9px;
  border-radius:20px;
  cursor:pointer;
  color:var(--muted);
  transition:all 0.25s cubic-bezier(0.16, 1, 0.3, 1);
  line-height:1;
}
.lang-btn:hover{
  color:var(--ink);
}
.lang-btn.active{
  background:var(--surface);
  color:var(--ink);
  box-shadow:0 2px 8px rgba(18,20,43,0.12);
}
.mobile-toggle{
  position:relative;
  width:32px; height:24px;
  background:transparent; border:none; appearance:none; -webkit-appearance:none;
  cursor:pointer; padding:0;
  z-index:110;
}
@media (min-width:860px){
  .mobile-toggle{ display:none; }
}
.mobile-toggle .bar{
  position:absolute; left:0;
  width:100%; height:3px;
  background:var(--ink);
  border-radius:2px;
  transition:all 0.3s ease;
}
.mobile-toggle .bar:nth-child(1){ top:0; }
.mobile-toggle .bar:nth-child(2){ top:50%; transform:translateY(-50%); }
.mobile-toggle .bar:nth-child(3){ bottom:0; }

/* Canh giữa theo top:50% nên luôn đúng tâm dù kích thước nút đổi theo breakpoint */
.mobile-toggle.active .bar:nth-child(1){
  top:50%; transform:translateY(-50%) rotate(45deg);
}
.mobile-toggle.active .bar:nth-child(2){
  opacity:0;
}
.mobile-toggle.active .bar:nth-child(3){
  top:50%; bottom:auto; transform:translateY(-50%) rotate(-45deg);
}

.mobile-menu{
  display:flex; flex-direction:column; gap:16px;
  position:fixed; top:72px; left:0; right:0;
  background:rgba(255,255,255,0.98);
  backdrop-filter:blur(16px);
  padding:24px 32px 32px;
  border-bottom:1px solid var(--line);
  box-shadow:0 16px 32px rgba(18,20,43,0.08);
  transform:translateY(-120%);
  opacity:0; pointer-events:none;
  transition:transform 0.35s cubic-bezier(0.16,1,0.3,1), opacity 0.25s ease;
  z-index:99;
}
.mobile-menu.open{
  transform:translateY(0);
  opacity:1; pointer-events:auto;
}
.mobile-link{
  font-family:var(--display);
  font-size:17px; font-weight:600;
  text-decoration:none; color:var(--ink);
  padding:8px 0; border-bottom:1px solid var(--line);
}
.mobile-link:hover{
  color:var(--indigo);
}
.mobile-cta{
  justify-content:center;
  margin-top:8px;
}

nav.links{ display:none; gap:34px; }
@media (min-width:860px){ nav.links{ display:flex; } }
nav.links a{
  font-size:14.5px; font-weight:500; text-decoration:none; color:var(--ink-soft);
  padding:6px 2px; position:relative;
}
nav.links a::after{
  content:""; position:absolute; left:0; right:0; bottom:-2px; height:2px;
  background:var(--indigo); transform:scaleX(0); transform-origin:left;
  transition:transform .2s ease;
}
nav.links a:hover{ color:var(--ink); }
nav.links a:hover::after{ transform:scaleX(1); }
nav.links a:focus-visible, .btn:focus-visible, a:focus-visible{
  outline:2px solid var(--indigo); outline-offset:3px; border-radius:2px;
}

.btn{
  display:inline-flex; align-items:center; gap:8px;
  font-family:var(--body); font-weight:600; font-size:14.5px;
  text-decoration:none; padding:12px 22px; border-radius:10px;
  border:1px solid transparent; cursor:pointer;
  transition:transform .15s ease, background .15s ease, border-color .15s ease, color .15s ease;
}
.btn-primary{ background:var(--ink); color:var(--paper); }
.btn-primary:hover{ background:var(--indigo-deep); transform:translateY(-1px); }
.btn-ghost{ border-color:var(--line-strong); color:var(--ink); background:transparent; }
.btn-ghost:hover{ border-color:var(--ink); }
.btn-sm{ padding:9px 16px; font-size:13.5px; border-radius:8px; }

.hero{
  padding:80px 0 0;
  display:grid; grid-template-columns:1fr; gap:52px;
}
@media (min-width:960px){
  .hero{ grid-template-columns:1.05fr 0.95fr; align-items:center; padding:104px 0 0; }
}
.hero h1{
  font-size:clamp(36px, 5.2vw, 58px);
  max-width:16.5ch;
}
.hero .lede{
  margin-top:22px; font-size:17.5px; color:var(--ink-soft); max-width:46ch;
}
.hero .actions{ margin-top:32px; display:flex; gap:14px; flex-wrap:wrap; }
.hero .meta{
  margin-top:40px; display:flex; gap:30px; flex-wrap:wrap;
}
.hero .meta div{ font-size:12.5px; color:var(--muted); font-family:var(--mono); }
.hero .meta strong{ display:block; font-family:var(--display); font-size:22px; color:var(--ink); font-weight:700; }

.mosaic{
  position:relative;
  display:grid;
  grid-template-columns:repeat(2, 1fr);
  gap:14px;
}
.tile{
  border-radius:18px; padding:20px;
  color:#fff; position:relative; overflow:hidden;
  min-height:126px;
  display:flex; flex-direction:column; justify-content:space-between;
  box-shadow:0 18px 34px -20px rgba(18,20,43,0.55);
  isolation:isolate;
}
.tile::before{
  content:""; position:absolute; inset:0; z-index:-1;
  background:radial-gradient(120% 140% at 100% 0%, rgba(255,255,255,0.22), transparent 60%);
}
.tile .t-name{ font-family:var(--display); font-weight:700; font-size:15.5px; }
.tile .t-tag{ font-size:11.5px; opacity:.84; margin-top:2px; }
.tile .t-icon{ width:26px; height:26px; }
.tile.big{ grid-column:span 2; min-height:104px; flex-direction:row; align-items:center; justify-content:space-between; gap:14px;}
.tile.big .t-icon{ width:32px; height:32px; }
.tile.big .t-live{
  font-family:var(--mono); font-size:11px; background:rgba(255,255,255,.16);
  padding:5px 9px; border-radius:999px; display:flex; align-items:center; gap:6px;
}
.tile.big .t-live .dot{ width:6px; height:6px; border-radius:50%; background:var(--lime); animation:pulse 1.8s ease-in-out infinite; }
@keyframes pulse{ 0%,100%{ opacity:1; transform:scale(1);} 50%{ opacity:.4; transform:scale(1.5);} }

.tile.ztool{ background:linear-gradient(135deg, var(--c-ztool), var(--c-ztool-d)); }
.tile.spa{ background:linear-gradient(135deg, var(--c-spa), var(--c-spa-d)); }
.tile.kcn{ background:linear-gradient(135deg, var(--c-kcn), var(--c-kcn-d)); }
.tile.icham{ background:linear-gradient(135deg, var(--c-icham), var(--c-icham-d)); }
.tile.qr{ background:linear-gradient(135deg, var(--c-qr-d), var(--c-qr)); }

.marquee-shell{ margin-top:64px; border-top:1px solid var(--line); padding:26px 0; overflow:hidden; }
.marquee-label{ font-family:var(--mono); font-size:11.5px; color:var(--muted); margin-bottom:16px; }
.marquee{ display:flex; width:max-content; gap:56px; animation:scroll 28s linear infinite; }
.marquee span{ font-family:var(--display); font-weight:600; font-size:17px; color:var(--ink-soft); white-space:nowrap; opacity:.75; }
@keyframes scroll{ from{ transform:translateX(0);} to{ transform:translateX(-50%);} }

section{ padding:96px 0; }
.section-head{ max-width:640px; margin-bottom:52px; }
.section-head .kicker{ font-family:var(--mono); font-size:12.5px; color:var(--indigo); margin-bottom:12px; }
.section-head h2{ font-size:clamp(27px, 3.6vw, 40px); }
.section-head p{ margin-top:14px; color:var(--ink-soft); font-size:16.5px; }

#stats{ background:var(--ink); color:var(--paper); padding:56px 0; }
.stats-row{ display:grid; grid-template-columns:repeat(2,1fr); gap:32px; }
@media (min-width:760px){ .stats-row{ grid-template-columns:repeat(4,1fr); } }
.stats-row div{ border-left:1px solid rgba(242,243,238,0.18); padding-left:20px; }
.stats-row strong{ display:block; font-family:var(--display); font-size:clamp(28px,3vw,38px); font-weight:700; }
.stats-row span{ font-family:var(--mono); font-size:12px; color:rgba(242,243,238,0.6); display:block; margin-top:6px; }

#about{ background:var(--surface); border-bottom:1px solid var(--line); }
.about-grid{ display:grid; grid-template-columns:1fr; gap:48px; }
@media (min-width:900px){ .about-grid{ grid-template-columns:1fr 0.9fr; } }
.about-copy p{ color:var(--ink-soft); font-size:16px; margin-top:16px; max-width:52ch; }
.timeline{ display:flex; flex-direction:column; gap:0; }
.t-row{ display:flex; gap:20px; padding:18px 0; border-top:1px solid var(--line); }
.t-row:first-child{ border-top:none; }
.t-row .yr{ font-family:var(--mono); font-size:13px; color:var(--indigo); width:64px; flex:none; padding-top:2px; }
.t-row .tx strong{ display:block; font-size:15px; font-weight:600; }
.t-row .tx p{ margin:4px 0 0; font-size:13.5px; color:var(--muted); }

#products{ padding-top:100px; background:var(--paper); }
.product{
  display:grid; grid-template-columns:1fr; gap:36px;
  padding:52px 0; border-top:1px solid var(--line);
}
.product:last-of-type{ border-bottom:1px solid var(--line); }
@media (min-width:960px){
  .product{ grid-template-columns: 0.92fr 1.08fr; gap:64px; align-items:center; }
  .product.rev .p-visual-col{ order:2; }
  .product.rev .p-copy-col{ order:1; }
}

.p-visual-col{ position:relative; }
.mockup{
  border-radius:20px; padding:22px; color:#fff; min-height:230px;
  position:relative; overflow:hidden;
  display:flex; flex-direction:column; gap:14px;
  box-shadow:0 26px 50px -28px rgba(18,20,43,0.5);
}
.mockup .m-head{ display:flex; align-items:center; justify-content:space-between; }
.mockup .m-badge{ font-family:var(--mono); font-size:11px; background:rgba(255,255,255,0.16); padding:5px 10px; border-radius:999px; }
.mockup .m-icon{ width:22px; height:22px; opacity:.9; }

.m-ztool{ background:linear-gradient(160deg, var(--c-ztool), var(--c-ztool-d)); }
.m-spa{ background:linear-gradient(160deg, var(--c-spa), var(--c-spa-d)); }
.m-kcn{ background:linear-gradient(160deg, var(--c-kcn), var(--c-kcn-d)); }
.m-icham{ background:linear-gradient(160deg, var(--c-icham), var(--c-icham-d)); }
.m-qr{ background:linear-gradient(160deg, var(--c-qr-d), var(--c-qr)); }

.chat-stack{ display:flex; flex-direction:column; gap:8px; margin-top:auto; }
.bubble{ background:rgba(255,255,255,0.14); border-radius:10px; padding:9px 12px; font-size:12.5px; max-width:78%; }
.bubble.me{ align-self:flex-end; background:rgba(255,255,255,0.28); }
.chat-counter{ font-family:var(--mono); font-size:12px; opacity:.85; }

.cal-grid{ display:grid; grid-template-columns:repeat(5,1fr); gap:6px; margin-top:auto; }
.cal-cell{ height:34px; border-radius:6px; background:rgba(255,255,255,0.12); }
.cal-cell.on{ background:rgba(255,255,255,0.42); }
.cal-foot{ font-family:var(--mono); font-size:11.5px; opacity:.85; display:flex; justify-content:space-between; }

.chart-row{ display:flex; align-items:flex-end; gap:8px; height:90px; margin-top:auto; }
.bar{ flex:1; background:rgba(255,255,255,0.26); border-radius:5px 5px 0 0; }
.chart-callout{ font-family:var(--mono); font-size:22px; font-weight:600; }

.net-wrap{ position:relative; height:110px; margin-top:auto; }
.net-hub{ position:absolute; left:50%; top:50%; transform:translate(-50%,-50%); width:34px; height:34px; border-radius:50%; background:#fff; }
.net-node{ position:absolute; width:14px; height:14px; border-radius:50%; background:rgba(255,255,255,0.55); }

.qr-wrap{ display:flex; gap:18px; align-items:center; margin-top:auto; }
.qr-code{ width:78px; height:78px; border-radius:8px; background:#fff; position:relative; flex:none; }
.qr-code::before{
  content:""; position:absolute; inset:10px;
  background-image:
    linear-gradient(90deg, var(--ink) 0 22%, transparent 22% 44%, var(--ink) 44% 66%, transparent 66% 88%, var(--ink) 88%),
    linear-gradient(0deg, var(--ink) 0 22%, transparent 22% 44%, var(--ink) 44% 66%, transparent 66% 88%, var(--ink) 88%);
  background-size:100% 8px, 8px 100%;
  opacity:.85;
}
.qr-stats{ font-family:var(--mono); font-size:11.5px; }
.qr-stats div{ display:flex; justify-content:space-between; gap:16px; padding:4px 0; border-top:1px solid rgba(255,255,255,0.18); }
.qr-stats div:first-child{ border-top:none; }

.p-copy-col h3{ font-size:25px; }
.p-domain-tag{ font-family:var(--mono); font-size:12.5px; color:var(--indigo); margin-bottom:10px; display:block; }
.p-desc{ margin-top:12px; color:var(--ink-soft); font-size:15.5px; max-width:60ch; }
.p-features{ list-style:none; margin:22px 0 0; padding:0; display:grid; grid-template-columns:1fr; gap:11px; }
@media (min-width:560px){ .p-features{ grid-template-columns:1fr 1fr; } }
.p-features li{ font-size:14px; color:var(--ink-soft); padding-left:18px; position:relative; }
.p-features li::before{ content:""; position:absolute; left:0; top:7px; width:7px; height:7px; border-radius:2px; background:var(--indigo); }
.product .p-cta{ margin-top:26px; }

#testimonials{ background:var(--surface); border-top:1px solid var(--line); border-bottom:1px solid var(--line); }
.quote-grid{ display:grid; grid-template-columns:1fr; gap:28px; }
@media (min-width:820px){ .quote-grid{ grid-template-columns:repeat(3,1fr); } }
.quote-card{ border:1px solid var(--line); border-radius:16px; padding:28px; background:var(--paper); }
.quote-mark{ font-family:var(--display); font-size:40px; color:var(--indigo); line-height:1; }
.quote-card p{ margin-top:8px; font-size:14.5px; color:var(--ink-soft); }
.quote-who{ margin-top:20px; padding-top:16px; border-top:1px solid var(--line); }
.quote-who strong{ display:block; font-size:14px; }
.quote-who span{ font-size:12.5px; color:var(--muted); }

#process{ background:var(--ink); color:var(--paper); }
#process .section-head p{ color:rgba(242,243,238,0.68); }
#process .section-head h2{ color:var(--paper); }
#process .section-head .kicker{ color:var(--lime); }
.process-row{ display:grid; grid-template-columns:1fr; gap:0; }
@media (min-width:820px){ .process-row{ grid-template-columns:repeat(3,1fr); } }
.process-step{ padding:28px 26px; border-top:1px solid rgba(242,243,238,0.16); }
@media (min-width:820px){ .process-step{ border-top:none; border-left:1px solid rgba(242,243,238,0.16); } .process-step:first-child{ border-left:none; } }
.process-step .num{ font-family:var(--mono); font-size:13px; color:var(--lime); }
.process-step h4{ margin-top:14px; font-size:19px; font-weight:600; }
.process-step p{ margin-top:10px; font-size:14px; color:rgba(242,243,238,0.68); }

#values{ background:var(--paper); }
.value-grid{ display:grid; grid-template-columns:1fr; gap:1px; background:var(--line); border:1px solid var(--line); border-radius:16px; overflow:hidden; }
@media (min-width:640px){ .value-grid{ grid-template-columns:repeat(2,1fr); } }
@media (min-width:960px){ .value-grid{ grid-template-columns:repeat(3,1fr); } }
.value{ background:var(--surface); padding:32px 28px; }
.value h4{ font-size:17px; font-weight:600; }
.value p{ margin-top:10px; font-size:14px; color:var(--muted); }

#contact{ background:var(--surface); }
.contact-card{
  background:linear-gradient(135deg, #12142B 0%, #1A1D3D 55%, #252854 100%);
  color:var(--paper);
  border-radius:24px;
  padding:58px 48px;
  display:grid;
  grid-template-columns:1.15fr 0.85fr;
  gap:44px;
  position:relative;
  overflow:hidden;
  border:1px solid rgba(255,255,255,0.06);
  box-shadow:0 24px 48px -12px rgba(18,20,43,0.35);
}
.contact-card::before{
  content:"";
  position:absolute;
  inset:0;
  background:radial-gradient(ellipse 70% 60% at 85% 20%, rgba(76,79,246,0.22), transparent 70%);
  pointer-events:none;
}
.contact-card h2{ font-size:clamp(26px,3.2vw,36px); max-width:16ch; position:relative; line-height:1.22; }
.contact-card .lede{ margin-top:16px; color:rgba(242,243,238,0.78); max-width:46ch; position:relative; font-size:16px; line-height:1.6; }
.contact-card .actions{ margin-top:32px; display:flex; gap:14px; flex-wrap:wrap; position:relative; }
.contact-card .btn-primary{ background:var(--lime); color:var(--ink); font-weight:700; }
.contact-card .btn-primary:hover{ background:#c4ee2c; }
.contact-card .btn-ghost{ border-color:rgba(242,243,238,0.3); color:var(--paper); }
.contact-card .btn-ghost:hover{ border-color:var(--paper); }

.contact-info{ font-size:15px; color:#FFFFFF; position:relative; }
.contact-info div{ padding:14px 0; border-top:1px solid rgba(242,243,238,0.16); }
.contact-info div:first-child{ border-top:none; }
.contact-info span.c-label{ display:block; font-family:var(--mono); font-size:12px; color:rgba(242,243,238,0.65); letter-spacing:0.04em; margin-bottom:5px; text-transform:uppercase; }
.contact-info .c-val{ display:block; color:#FFFFFF; font-weight:600; font-size:15.5px; line-height:1.45; }

footer{ padding:44px 0 52px; }
.footer-row{
  display:flex; flex-wrap:wrap; justify-content:space-between; gap:16px;
  padding-top:28px; border-top:1px solid var(--line);
  font-size:13px; color:var(--muted);
}
.footer-links{ display:flex; gap:22px; flex-wrap:wrap; }
.footer-links a{ text-decoration:none; color:var(--muted); }
.footer-links a:hover{ color:var(--ink); }

/* Hiệu ứng tương tác mượt mà theo phong cách 2top.vn */
.tile{
  transition:transform 0.35s cubic-bezier(0.16, 1, 0.3, 1), box-shadow 0.35s ease;
}
.tile:hover{
  transform:translateY(-6px) scale(1.015);
  box-shadow:0 24px 44px -16px rgba(18,20,43,0.45);
}
.mockup{
  transition:transform 0.4s ease, box-shadow 0.4s ease;
}
.product:hover .mockup{
  transform:translateY(-5px);
  box-shadow:0 30px 60px -20px rgba(18,20,43,0.38);
}
.value{
  transition:background 0.3s ease, transform 0.3s ease;
}
.value:hover{
  background:#fafafa;
  transform:translateY(-3px);
}
.quote-card{
  transition:transform 0.3s ease, box-shadow 0.3s ease;
}
.quote-card:hover{
  transform:translateY(-5px);
  box-shadow:0 18px 36px -12px rgba(18,20,43,0.12);
}

/* Định dạng Logo Sản Phẩm Trong Khối Mosaic & Product */
.tile-icon-box{
  width:40px; height:40px;
  display:flex; align-items:center; justify-content:center;
  background:rgba(255,255,255,0.18);
  border-radius:10px;
  overflow:hidden;
  padding:4px;
}
.t-logo-img{
  width:100%; height:100%;
  object-fit:contain;
  border-radius:6px;
}
.t-logo-round{
  border-radius:50%;
}
.t-logo-contain{
  filter:brightness(0) invert(1);
}

.mockup-logo-img{
  width:32px; height:32px;
  object-fit:contain;
  border-radius:8px;
  background:rgba(255,255,255,0.15);
  padding:3px;
}
.mockup-logo-round{
  border-radius:50%;
  background:#fff;
  padding:2px;
}
.mockup-logo-contain{
  background:#fff;
  padding:4px 6px;
}

.p-title-wrap{
  display:flex; align-items:center; gap:12px;
  margin-bottom:8px;
}
.p-brand-badge{
  width:38px; height:38px;
  object-fit:contain;
  border-radius:9px;
  box-shadow:0 4px 12px rgba(18,20,43,0.12);
  flex:none;
}
.p-badge-round{
  border-radius:50%;
  background:#fff;
  border:1px solid rgba(18,20,43,0.08);
}
.p-badge-contain{
  background:#fff;
  padding:4px;
  border:1px solid rgba(18,20,43,0.08);
}
.p-badge-qr{
  background:var(--ink);
  color:#fff;
  display:flex; align-items:center; justify-content:center;
}

/* ==========================================================================
   TỐI ƯU HÓA RESPONSIVE TOÀN DIỆN & CAO CẤP (320px - 1024px)
   ========================================================================== */

/* Tablet & Màn hình vừa (max-width: 992px) */
@media (max-width: 992px) {
  .hero {
    grid-template-columns: 1fr;
    gap: 48px;
    padding: 60px 0 0;
  }
  .hero h1 {
    max-width: 100%;
    font-size: clamp(32px, 4.5vw, 46px);
  }
  .hero .lede {
    max-width: 100%;
  }
  .mosaic {
    max-width: 600px;
    margin: 0 auto;
    width: 100%;
  }
  .about-grid {
    grid-template-columns: 1fr;
    gap: 40px;
  }
  .product, .product.rev {
    grid-template-columns: 1fr;
    gap: 36px;
  }
  .product.rev .p-visual-col {
    order: 0;
  }
  .product.rev .p-copy-col {
    order: 1;
  }
  .contact-card {
    grid-template-columns: 1fr;
    padding: 48px 36px;
    gap: 40px;
  }
  .contact-card h2 {
    max-width: 100%;
  }
}

/* Tablet & Mobile chuẩn (max-width: 768px) */
@media (max-width: 768px) {
  body {
    font-size: 15px;
  }
  .wrap {
    padding: 0 20px;
  }
  .nav {
    padding: 12px 20px;
  }
  .brand-logo {
    height: 38px;
    max-width: 150px;
  }
  .mobile-menu {
    top: 65px;
    padding: 20px 24px 28px;
  }
  
  /* Hero */
  .hero {
    padding: 40px 0 0;
    gap: 36px;
  }
  .hero h1 {
    font-size: clamp(26px, 6vw, 36px);
    line-height: 1.2;
  }
  .hero .lede {
    font-size: 15.5px;
    line-height: 1.6;
    margin-top: 16px;
  }
  .hero .actions {
    flex-direction: column;
    gap: 12px;
  }
  .hero .actions .btn {
    width: 100%;
    justify-content: center;
    text-align: center;
  }
  .hero .meta {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 20px 16px;
    margin-top: 32px;
  }
  .hero .meta strong {
    font-size: 20px;
  }
  
  /* Mosaic */
  .mosaic {
    grid-template-columns: 1fr 1fr;
    gap: 12px;
  }
  .tile {
    padding: 16px;
    min-height: 120px;
  }
  .tile.big {
    grid-column: span 2;
    flex-direction: row;
    align-items: center;
  }
  
  /* Marquee */
  .marquee-shell {
    margin-top: 48px;
    padding: 20px 0;
  }
  .marquee span {
    font-size: 15px;
  }
  
  /* Sections chung */
  section {
    padding: 56px 0;
  }
  .section-head {
    margin-bottom: 32px;
  }
  .section-head h2 {
    font-size: clamp(24px, 5vw, 32px);
  }
  .section-head p {
    font-size: 15px;
    margin-top: 10px;
  }
  
  /* Stats Row */
  .stats-row {
    grid-template-columns: repeat(2, 1fr);
    gap: 24px 16px;
  }
  .stats-row div {
    padding-left: 12px;
  }
  .stats-row strong {
    font-size: 26px;
  }
  .stats-row span {
    font-size: 11px;
    margin-top: 4px;
  }
  
  /* Timeline */
  .t-row {
    gap: 14px;
    padding: 14px 0;
  }
  .t-row .yr {
    width: 58px;
    font-size: 12px;
  }
  
  /* Products & Mockups */
  .product {
    padding: 38px 0;
    gap: 28px;
  }
  .mockup {
    min-height: 200px;
    padding: 18px;
  }
  .p-copy-col h3 {
    font-size: 21px;
    line-height: 1.3;
  }
  .p-desc {
    font-size: 14.5px;
    margin-top: 10px;
  }
  .p-features {
    grid-template-columns: 1fr;
    gap: 9px;
    margin-top: 18px;
  }
  .p-features li {
    font-size: 13.5px;
  }
  
  /* Quotes / Testimonials */
  .quote-grid {
    grid-template-columns: 1fr;
    gap: 16px;
  }
  .quote-card {
    padding: 22px;
  }
  
  /* Process */
  .process-row {
    grid-template-columns: 1fr;
  }
  .process-step {
    padding: 22px 0;
    border-left: none;
    border-top: 1px solid rgba(242,243,238,0.16);
  }
  .process-step:first-child {
    border-top: none;
  }
  .process-step h4 {
    font-size: 17px;
    margin-top: 10px;
  }
  
  /* Value Grid */
  .value-grid {
    grid-template-columns: 1fr;
  }
  .value {
    padding: 24px 20px;
  }
  
  /* Contact Card */
  .contact-card {
    grid-template-columns: 1fr;
    padding: 36px 20px;
    border-radius: 20px;
    gap: 32px;
  }
  .contact-card h2 {
    font-size: 24px;
    line-height: 1.25;
    max-width: 100%;
  }
  .contact-card .lede {
    max-width: 100%;
  }
  .contact-card .actions {
    flex-direction: column;
    gap: 10px;
    margin-top: 24px;
  }
  .contact-card .actions .btn {
    width: 100%;
    justify-content: center;
  }
  .contact-info {
    font-size: 14px;
  }
  .contact-info .c-val {
    font-size: 14.5px;
  }
  
  /* Footer */
  footer {
    padding: 36px 0 44px;
  }
  .footer-row {
    flex-direction: column;
    align-items: flex-start;
    gap: 20px;
  }
  .footer-links {
    gap: 16px;
  }
}

/* Màn hình nhỏ / Điện thoại thông thường (max-width: 480px) */
@media (max-width: 480px) {
  .wrap {
    padding: 0 16px;
  }
  .nav {
    padding: 10px 16px;
  }
  .brand-logo {
    height: 32px;
    max-width: 120px;
  }
  .nav-right {
    gap: 8px;
  }
  .lang-switcher {
    padding: 2px;
  }
  .lang-btn {
    font-size: 11px;
    padding: 3px 7px;
  }
  .mobile-toggle {
    width: 28px;
    height: 20px;
  }
  .hero h1 {
    font-size: 25px;
  }
  .hero .lede {
    font-size: 14.5px;
  }
  .hero .meta {
    grid-template-columns: 1fr 1fr;
    gap: 16px 12px;
  }
  .hero .meta strong {
    font-size: 18px;
  }
  .hero .meta div {
    font-size: 11px;
  }
  
  /* Mosaic thu về 1 cột trên mobile nhỏ */
  .mosaic {
    grid-template-columns: 1fr;
  }
  .tile.big {
    grid-column: span 1;
    flex-direction: column;
    align-items: flex-start;
    gap: 12px;
  }
  .tile {
    min-height: 105px;
  }
  
  /* Stats 1 cột */
  .stats-row {
    grid-template-columns: 1fr;
    gap: 18px;
  }
  .stats-row strong {
    font-size: 24px;
  }
  
  /* Title wrap sản phẩm */
  .p-title-wrap {
    flex-direction: row;
    align-items: center;
    gap: 10px;
  }
  .p-title-wrap h3 {
    font-size: 18px;
  }
  .p-brand-badge {
    width: 32px;
    height: 32px;
  }
  
  .mockup {
    min-height: 180px;
    padding: 14px;
  }
  .chat-stack .bubble {
    font-size: 12.5px;
    padding: 7px 11px;
  }
  .chat-counter {
    font-size: 11px;
  }
  .cal-grid {
    gap: 5px;
  }
  .cal-cell {
    height: 18px;
  }
  
  .contact-card {
    padding: 30px 18px;
    gap: 28px;
  }
  .contact-card h2 {
    font-size: 22px;
    line-height: 1.25;
  }
  .contact-card .lede {
    font-size: 14px;
    margin-top: 12px;
  }
  .contact-card .actions {
    margin-top: 20px;
    gap: 8px;
  }
}