:root{
    --navy:#0F2340;
    --navy-deep:#0A182E;
    --zinc:#8C97A1;
    --zinc-light:#E6E8EA;
    --orange:#E6541C;
    --orange-dark:#C44413;
    --concrete:#F1EFEA;
    --ink:#171B20;
    --white:#ffffff;
    --radius:2px;
  }
  *{box-sizing:border-box; margin:0; padding:0;}
  html{scroll-behavior:smooth;}
  body{
    font-family:'Be Vietnam Pro', sans-serif;
    color:var(--ink);
    background:var(--concrete);
    line-height:1.6;
    overflow-x:hidden;
  }
  h1,h2,h3,.display{
    font-family:'Oswald', sans-serif;
    text-transform:uppercase;
    letter-spacing:0.01em;
    color:var(--navy);
    line-height:1.12;
  }
  .mono{font-family:'JetBrains Mono', monospace;}
  a{color:inherit; text-decoration:none;}
  img{display:block; max-width:100%;}
  .wrap{max-width:1180px; margin:0 auto; padding:0 24px;}
  ul{list-style:none;}

  /* language toggle */
  body:not(.lang-zh) .zh{display:none;}
  body.lang-zh .vi{display:none;}
  .zh{font-family:'Be Vietnam Pro','Noto Sans SC',sans-serif;}

  /* ---------- header ---------- */
  header{
    position:sticky; top:0; z-index:50;
    background:var(--navy);
    border-bottom:3px solid var(--orange);
  }
  .nav{
    display:flex; align-items:center; justify-content:space-between;
    height:74px;
  }
  .brand{display:flex; align-items:center; gap:12px; color:var(--white);}
  .brand svg{width:36px; height:36px; flex:none;}
  .brand-text{line-height:1.15;}
  .brand-text .b1{font-family:'Oswald',sans-serif; font-weight:600; font-size:17px; letter-spacing:0.03em;}
  .brand-text .b2{font-size:10.5px; color:var(--zinc-light); letter-spacing:0.06em;}
  nav.links{display:flex; gap:30px;}
  nav.links a{color:var(--zinc-light); font-size:14.5px; font-weight:500; transition:color .15s;}
  nav.links a:hover{color:var(--orange);}
  .nav-right{display:flex; align-items:center; gap:14px;}
  .lang-switch{display:flex; border:1px solid rgba(255,255,255,.25); border-radius:20px; overflow:hidden;}
  .lang-switch button{
    background:transparent; border:none; color:var(--zinc-light);
    font-size:12px; font-weight:600; padding:6px 12px; cursor:pointer; font-family:inherit;
  }
  .lang-switch button.active{background:var(--orange); color:var(--white);}
  .btn{
    display:inline-flex; align-items:center; gap:8px;
    padding:11px 22px; font-weight:600; font-size:14.5px;
    border-radius:2px; border:2px solid transparent; cursor:pointer;
    transition:transform .15s, background .15s, border-color .15s;
    font-family:'Be Vietnam Pro', sans-serif;
  }
  .btn:hover{transform:translateY(-1px);}
  .btn-primary{background:var(--orange); color:var(--white);}
  .btn-primary:hover{background:var(--orange-dark);}
  .btn-outline{border-color:rgba(255,255,255,.35); color:var(--white);}
  .btn-outline:hover{border-color:var(--orange); color:var(--orange);}
  .btn-nav{padding:9px 18px; font-size:13.5px;}
  .menu-toggle{display:none;}

  /* ---------- hero ---------- */
  .hero{
    position:relative; color:var(--white);
    min-height:80vh; display:flex; align-items:flex-end;
    background:linear-gradient(180deg, rgba(10,24,46,.55) 0%, rgba(10,24,46,.65) 40%, rgba(10,24,46,.96) 100%), url('../images/hero-warehouse.jpg') center/cover no-repeat;
  }
  .hero-inner{padding:80px 24px 64px; width:100%;}
  @media (max-width:600px){
    .hero{min-height:auto; aspect-ratio:3/4;}
    .hero-inner{padding:36px 20px 32px;}
  }
  .eyebrow{
    display:inline-flex; align-items:center; gap:10px;
    font-family:'JetBrains Mono',monospace; font-size:12.5px; letter-spacing:.08em;
    color:var(--orange); text-transform:uppercase; margin-bottom:22px;
  }
  .eyebrow .rule{width:34px; height:2px; background:var(--orange);}
  .hero h1{
    font-size:clamp(32px, 5.2vw, 64px); font-weight:700; max-width:920px;
    color:var(--white);
  }
  .hero h1 span{color:var(--orange);}
  .hero h1 > .vi, .hero h1 > .zh{color:var(--white);}
  .hero h1 > .vi > span, .hero h1 > .zh > span{color:var(--orange);}
  .hero p.sub{
    max-width:620px; margin-top:22px; font-size:17px; color:var(--zinc-light);
  }
  .hero-cta{display:flex; flex-wrap:wrap; gap:14px; margin-top:34px;}
  .rosette-mark{
    position:absolute; right:6%; top:14%; width:150px; height:150px; opacity:.9;
    animation:spin-in 1.4s ease-out;
  }
  @keyframes spin-in{from{transform:rotate(-70deg) scale(.7); opacity:0;} to{transform:rotate(0) scale(1); opacity:.9;}}
  @media (prefers-reduced-motion: reduce){ .rosette-mark{animation:none;} }
  @media (max-width:820px){ .rosette-mark{display:none;} }

  /* ---------- stat bar ---------- */
  .statbar{background:var(--navy-deep); color:var(--white); padding:26px 0;}
  .statgrid{display:grid; grid-template-columns:repeat(4,1fr); gap:20px; text-align:left;}
  .stat .num{font-family:'JetBrains Mono',monospace; font-size:26px; font-weight:700; color:var(--orange);}
  .stat .lbl{font-size:12.5px; color:var(--zinc-light); margin-top:4px; letter-spacing:.02em;}
  @media (max-width:760px){ .statgrid{grid-template-columns:repeat(2,1fr); row-gap:24px;} }

  /* ---------- section basics ---------- */
  section{padding:88px 0;}
  .section-head{max-width:680px; margin-bottom:52px;}
  .kicker{
    font-family:'JetBrains Mono',monospace; font-size:12.5px; letter-spacing:.08em;
    color:var(--orange); text-transform:uppercase; display:flex; align-items:center; gap:10px; margin-bottom:14px;
  }
  .kicker .rule{width:24px; height:2px; background:var(--orange);}
  .section-head h2{font-size:clamp(26px,3.4vw,38px);}
  .section-head p{margin-top:14px; color:#40474f; font-size:16px; max-width:560px;}

  /* ---------- services ---------- */
  .svc-grid{display:grid; grid-template-columns:1.3fr 1fr 1fr; gap:20px;}
  .svc-card{
    background:var(--white); border:1px solid #E1DFD8; padding:30px 26px;
    display:flex; flex-direction:column; gap:12px; position:relative;
  }
  .svc-card.feature{
    grid-row:span 2; background:var(--navy); color:var(--white); border:none;
    background-image:linear-gradient(160deg, rgba(15,35,64,.9), rgba(10,24,46,.97)), url('../images/product-closeup.jpg');
    background-size:cover; background-position:center;
  }
  .svc-card.feature h3, .svc-card.feature .tag{color:var(--white);}
  .svc-card .tag{font-family:'JetBrains Mono',monospace; font-size:11.5px; color:var(--orange); letter-spacing:.05em;}
  .svc-card h3{font-size:19px; margin-top:2px;}
  .svc-card p{font-size:14.5px; color:#454b52;}
  .svc-card.feature p{color:var(--zinc-light);}
  .svc-card .rosette-ico{width:26px; height:26px; opacity:.85;}
  .svc-card.feature .rosette-ico path, .svc-card.feature .rosette-ico circle{stroke:var(--orange);}
  @media (max-width:900px){ .svc-grid{grid-template-columns:1fr; } .svc-card.feature{grid-row:auto;} }

  /* ---------- why us ---------- */
  .why-wrap{display:grid; grid-template-columns:1fr 1fr; gap:60px; align-items:center;}
  .why-list li{
    display:flex; gap:16px; padding:18px 0; border-bottom:1px solid #DEDCD4;
  }
  .why-list li:first-child{padding-top:0;}
  .why-list .rosette-ico{width:22px; height:22px; flex:none; margin-top:3px;}
  .why-list h4{font-family:'Oswald',sans-serif; font-size:16px; text-transform:none; color:var(--navy); font-weight:600;}
  .why-list p{font-size:14px; color:#4a5057; margin-top:3px;}
  .why-photo{position:relative;}
  .why-photo img{width:100%; aspect-ratio:4/5; object-fit:cover; object-position:center 20%;}
  .why-photo .badge{
    position:absolute; bottom:-18px; left:-18px; background:var(--orange); color:var(--white);
    padding:16px 20px; font-family:'Oswald',sans-serif; font-weight:600; font-size:14px; text-transform:uppercase;
    max-width:220px;
  }
  @media (max-width:880px){ .why-wrap{grid-template-columns:1fr;} .why-photo{order:-1;} }

  /* ---------- area ---------- */
  .area-section{background:var(--navy); color:var(--white);}
  .area-section .section-head p{color:var(--zinc-light);}
  .area-section .kicker{color:var(--orange);}
  .chips{display:flex; flex-wrap:wrap; gap:10px; margin-top:8px;}
  .chip{
    border:1px solid rgba(255,255,255,.3); padding:9px 16px; font-size:14px;
    font-family:'JetBrains Mono',monospace;
  }
  .chip.hq{background:var(--orange); border-color:var(--orange); font-weight:700;}
  .area-note{margin-top:28px; max-width:640px; font-size:15px; color:var(--zinc-light); border-left:3px solid var(--orange); padding-left:18px;}

  /* ---------- projects ---------- */
  .proj-grid{display:grid; grid-template-columns:1.4fr 1fr; gap:18px;}
  .proj-card{position:relative; overflow:hidden; background:var(--navy);}
  .proj-card img{width:100%; height:100%; object-fit:cover; transition:transform .4s;}
  /* bespoke ratios matched to each real photo's composition, not one-size-fits-all */
  .proj-card.tall{aspect-ratio:3/4;}           /* portrait photos with full standing people */
  .proj-card.wide{aspect-ratio:2/1;}
  .proj-card.land{aspect-ratio:16/10;}         /* normal landscape photos */
  .facility-pair{display:grid; grid-template-columns:1fr 1fr; gap:18px;}
  .facility-pair .proj-card{aspect-ratio:4/3;}
  @media (max-width:880px){
    .proj-card.tall{aspect-ratio:3/4;}
    .proj-card.wide{aspect-ratio:16/9;}
    .proj-card.land{aspect-ratio:4/3;}
    .facility-pair{grid-template-columns:1fr;}
  }
  .proj-card:hover img{transform:scale(1.05);}
  .proj-card .cap{
    position:absolute; left:0; right:0; bottom:0; padding:20px;
    background:linear-gradient(0deg, rgba(10,24,46,.92), rgba(10,24,46,0));
    color:var(--white);
  }
  .proj-card .cap .tag{font-family:'JetBrains Mono',monospace; font-size:11px; color:var(--orange);}
  .proj-card .cap h4{font-family:'Oswald',sans-serif; font-size:16px; margin-top:4px; text-transform:none; color:var(--white);}
  .proj-col{display:grid; grid-template-rows:auto 1fr; gap:18px;}
  .clientstrip{margin-top:26px; display:flex; flex-wrap:wrap; gap:10px 28px; font-family:'JetBrains Mono',monospace; font-size:13px; color:#5b616a;}
  .clientstrip span{white-space:nowrap;}
  @media (max-width:880px){ .proj-grid{grid-template-columns:1fr;} .proj-col{grid-template-rows:auto;} }

  /* ---------- process ---------- */
  .steps{display:grid; grid-template-columns:repeat(4,1fr); gap:20px;}
  .step{background:var(--white); border:1px solid #E1DFD8; padding:26px 22px;}
  .step .n{font-family:'JetBrains Mono',monospace; color:var(--orange); font-size:13px; font-weight:700;}
  .step h4{font-family:'Oswald',sans-serif; font-size:17px; color:var(--navy); margin:8px 0 6px; text-transform:none; font-weight:600;}
  .step p{font-size:13.5px; color:#4a5057;}
  @media (max-width:900px){ .steps{grid-template-columns:1fr 1fr;} }
  @media (max-width:560px){ .steps{grid-template-columns:1fr;} }

  /* ---------- contact ---------- */
  .contact-section{background:var(--navy-deep); color:var(--white);}
  .contact-wrap{display:grid; grid-template-columns:1fr 1fr; gap:60px;}
  .contact-info h2{color:var(--white); font-size:clamp(24px,3vw,32px);}
  .contact-info .kicker{color:var(--orange);}
  .info-row{display:flex; gap:14px; margin-top:20px; align-items:flex-start;}
  .info-row .lbl{font-family:'JetBrains Mono',monospace; font-size:11.5px; color:var(--zinc); min-width:90px; padding-top:2px;}
  .info-row .val{font-size:15px; color:var(--zinc-light);}
  .info-row .val a{color:var(--orange); font-weight:600;}
  .zalo-box{
    margin-top:30px; padding:22px; border:1px dashed rgba(255,255,255,.3);
    display:flex; align-items:center; justify-content:space-between; gap:16px; flex-wrap:wrap;
  }
  .zalo-box p{font-size:14px; color:var(--zinc-light); max-width:280px;}

  form.quote{background:var(--white); padding:32px; color:var(--ink);}
  form.quote .field{margin-bottom:16px;}
  form.quote label{display:block; font-size:12.5px; font-family:'JetBrains Mono',monospace; margin-bottom:6px; color:#4a5057;}
  form.quote input, form.quote select, form.quote textarea{
    width:100%; border:1px solid #C9CDD1; padding:11px 12px; font-family:inherit; font-size:14.5px; background:var(--concrete);
  }
  form.quote textarea{min-height:90px; resize:vertical;}
  form.quote .row2{display:grid; grid-template-columns:1fr 1fr; gap:14px;}
  form.quote button{width:100%; margin-top:6px;}
  .form-note{font-size:12px; color:#6b7178; margin-top:10px;}
  @media (max-width:880px){ .contact-wrap{grid-template-columns:1fr;} }

  /* ---------- footer ---------- */
  footer{background:var(--navy); color:var(--zinc-light); padding:26px 0;}
  .footer-row{display:flex; justify-content:space-between; align-items:center; flex-wrap:wrap; gap:10px; font-size:12.5px;}

  /* scroll fade-in */
  .reveal{opacity:1; transform:none;}

  @media (max-width:820px){
    nav.links{display:none;}
  }
  @media (max-width:600px){
    section{padding:52px 0;}
    .statbar{padding:20px 0;}
    .section-head{margin-bottom:34px;}
    .subhero{min-height:auto; aspect-ratio:4/5;}
    .subhero-inner{padding:32px 20px 28px;}
  }

/* ---------- breadcrumb ---------- */
.breadcrumb{background:var(--concrete); border-bottom:1px solid #E1DFD8; padding:14px 0; font-size:13px; color:#5b616a;}
.breadcrumb a{color:var(--navy); font-weight:600;}
.breadcrumb span{margin:0 6px; color:#9aa0a6;}

/* ---------- sub hero (smaller than home hero) ---------- */
.subhero{
  position:relative; color:var(--white); min-height:56vh; display:flex; align-items:flex-end;
  background:linear-gradient(180deg, rgba(10,24,46,.55) 0%, rgba(10,24,46,.7) 45%, rgba(10,24,46,.97) 100%), url('../images/hero-warehouse.jpg') center/cover no-repeat;
}
.subhero-waterproof{background-image:linear-gradient(180deg, rgba(10,24,46,.48) 0%, rgba(10,24,46,.72) 45%, rgba(10,24,46,.97) 100%), url('../images/project-boe.jpg');}
.subhero-paint{background-image:linear-gradient(180deg, rgba(10,24,46,.50) 0%, rgba(10,24,46,.74) 45%, rgba(10,24,46,.97) 100%), url('../images/team-site.jpg');}
.subhero-floor{background-image:linear-gradient(180deg, rgba(10,24,46,.50) 0%, rgba(10,24,46,.74) 45%, rgba(10,24,46,.97) 100%), url('../images/factory-floor-context.jpg');}
.subhero-interior{background-image:linear-gradient(180deg, rgba(10,24,46,.50) 0%, rgba(10,24,46,.74) 45%, rgba(10,24,46,.97) 100%), url('../images/team-site.jpg');}
.subhero-inner{padding:60px 24px 48px; width:100%;}
.subhero h1{font-size:clamp(28px,4.6vw,50px); color:var(--white); max-width:880px;}
.subhero h1 span{color:var(--orange);}
.subhero h1 > .vi, .subhero h1 > .zh{color:var(--white);}
.subhero h1 > .vi > span, .subhero h1 > .zh > span{color:var(--orange);}
.subhero p.sub{max-width:600px; margin-top:18px; font-size:16px; color:var(--zinc-light);}

/* ---------- homepage ringlock focus ---------- */
.home-ringlock{background:var(--concrete);}
.home-ringlock .chips .chip{border-color:#C7C2B8; color:var(--navy); background:rgba(255,255,255,.45);}
.home-ringlock .chips .chip.hq{color:var(--white); background:var(--orange); border-color:var(--orange);}

/* ---------- system compare cards (48 vs 60) ---------- */
.sys-grid{display:grid; grid-template-columns:1fr 1fr; gap:22px;}
.sys-card{background:var(--white); border:1px solid #E1DFD8; padding:30px;}
.sys-card .sys-tag{font-family:'JetBrains Mono',monospace; font-size:13px; color:var(--orange); font-weight:700;}
.sys-card h3{margin:8px 0 14px; font-size:22px;}
.sys-card ul{margin-top:12px;}
.sys-card li{position:relative; padding-left:20px; margin-bottom:8px; font-size:14.5px; color:#3d434a;}
.sys-card li::before{content:"—"; position:absolute; left:0; color:var(--orange);}
@media (max-width:820px){ .sys-grid{grid-template-columns:1fr;} }

/* ---------- spec table ---------- */
.spec-table{width:100%; border-collapse:collapse; background:var(--white);}
.spec-table th, .spec-table td{border:1px solid #E1DFD8; padding:13px 16px; text-align:left; font-size:14.5px;}
.spec-table th{background:var(--navy); color:var(--white); font-family:'Oswald',sans-serif; font-weight:500; text-transform:uppercase; font-size:12.5px; letter-spacing:.04em;}
.spec-table tr:nth-child(even) td{background:#F7F5F0;}
.spec-note{margin-top:14px; font-size:13px; color:#5b616a; border-left:3px solid var(--orange); padding-left:14px;}
.table-scroll{overflow-x:auto;}

/* ---------- area detail (industrial parks chips) ---------- */
.park-chips{display:flex; flex-wrap:wrap; gap:9px; margin-top:14px;}
.park-chip{border:1px solid rgba(255,255,255,.28); padding:7px 14px; font-size:13px; font-family:'JetBrains Mono',monospace;}

/* ---------- pricing policy ---------- */
.policy-grid{display:grid; grid-template-columns:repeat(3,1fr); gap:20px;}
.policy-card{background:var(--white); border:1px solid #E1DFD8; padding:24px;}
.policy-card .n{font-family:'JetBrains Mono',monospace; color:var(--orange); font-weight:700; font-size:13px;}
.policy-card h4{font-family:'Oswald',sans-serif; font-size:16px; color:var(--navy); margin:8px 0 6px; text-transform:none; font-weight:600;}
.policy-card p{font-size:14px; color:#4a5057;}
@media (max-width:820px){ .policy-grid{grid-template-columns:1fr;} }

/* ---------- FAQ accordion ---------- */
.faq-item{border-bottom:1px solid #DEDCD4;}
.faq-q{
  display:flex; justify-content:space-between; align-items:center; gap:16px;
  padding:20px 4px; cursor:pointer; background:none; border:none; width:100%; text-align:left;
  font-family:'Oswald',sans-serif; font-size:16.5px; color:var(--navy); font-weight:500;
}
.faq-q .plus{font-family:'JetBrains Mono',monospace; color:var(--orange); font-size:18px; flex:none; transition:transform .2s;}
.faq-item.open .faq-q .plus{transform:rotate(45deg);}
.faq-a{max-height:0; overflow:hidden; transition:max-height .25s ease;}
.faq-a p{padding:0 4px 20px; font-size:14.5px; color:#454b52; max-width:760px;}

/* ---------- mobile sticky CTA ---------- */
.sticky-cta{
  position:fixed; left:0; right:0; bottom:0; z-index:60;
  display:none; background:var(--navy); border-top:2px solid var(--orange);
  padding:10px 14px; gap:10px;
}
.sticky-cta a{flex:1; justify-content:center; font-size:13.5px; padding:12px 10px;}
@media (max-width:760px){ .sticky-cta{display:flex;} body{padding-bottom:64px;} }

/* ---------- related services (homepage service links out) ---------- */
.related-grid{display:grid; grid-template-columns:repeat(4,1fr); gap:16px;}
.related-card{background:var(--white); border:1px solid #E1DFD8; padding:22px; transition:border-color .15s, transform .15s;}
.related-card:hover{border-color:var(--orange); transform:translateY(-3px);}
.related-card .tag{font-family:'JetBrains Mono',monospace; font-size:11px; color:var(--orange);}
.related-card h4{font-family:'Oswald',sans-serif; font-size:15.5px; color:var(--navy); margin:6px 0; text-transform:none; font-weight:600;}
.related-card p{font-size:13px; color:#54595f;}
.related-card .go{font-size:12.5px; color:var(--orange); font-weight:600; margin-top:8px; display:inline-block;}
@media (max-width:900px){ .related-grid{grid-template-columns:1fr 1fr;} }
@media (max-width:560px){ .related-grid{grid-template-columns:1fr;} }

/* ---------- case photo galleries ---------- */
.case-grid{display:grid; grid-template-columns:repeat(3,1fr); gap:18px;}
.case-card{background:var(--white); border:1px solid #E1DFD8; overflow:hidden;}
.case-card img{width:100%; aspect-ratio:4/3; object-fit:cover;}
.case-card.wide{grid-column:span 2;}
.case-card.wide img{aspect-ratio:16/9;}
.case-card .case-body{padding:18px 20px;}
.case-card .tag{font-family:'JetBrains Mono',monospace; font-size:11px; color:var(--orange); letter-spacing:.05em;}
.case-card h4{font-family:'Oswald',sans-serif; color:var(--navy); font-size:16px; margin:6px 0; text-transform:none; font-weight:600;}
.case-card p{font-size:13.5px; color:#4a5057;}
@media (max-width:880px){.case-grid{grid-template-columns:1fr 1fr;} .case-card.wide{grid-column:auto;} .case-card.wide img{aspect-ratio:4/3;}}
@media (max-width:560px){.case-grid{grid-template-columns:1fr;}}