:root{
  --navy:#0d2340;--navy-2:#153a63;--steel:#5b7794;
  --orange:#f2691c;--orange-dk:#d4550e;
  --ink:#16202e;--body:#4a5768;--line:#e3e8ef;--bg:#f6f8fb;--white:#fff;
  --radius:14px;--shadow:0 4px 24px rgba(13,35,64,.08);--shadow-lg:0 18px 50px rgba(13,35,64,.16);
}
*{margin:0;padding:0;box-sizing:border-box}
html{scroll-behavior:smooth}
body{font-family:'Be Vietnam Pro',system-ui,-apple-system,'Segoe UI',Roboto,sans-serif;
  color:var(--body);background:var(--white);line-height:1.65;font-size:16.5px;-webkit-font-smoothing:antialiased}
img{max-width:100%;display:block}
a{color:inherit;text-decoration:none}
.wrap{width:min(1180px,92vw);margin-inline:auto}
h1,h2,h3,h4{color:var(--ink);line-height:1.22;font-weight:700;letter-spacing:-.01em}
h2{font-size:clamp(1.6rem,3.4vw,2.4rem)}
h3{font-size:1.15rem}
.eyebrow{color:var(--orange);font-weight:700;font-size:.8rem;letter-spacing:.14em;text-transform:uppercase;margin-bottom:.7rem}
.lead{font-size:1.05rem}
section{padding:clamp(3.5rem,7vw,6rem) 0}
.sec-head{max-width:760px;margin-bottom:2.8rem}
.sec-head p{margin-top:.9rem}

.btn{display:inline-flex;align-items:center;justify-content:center;gap:.55rem;
  padding:.95rem 1.7rem;border-radius:10px;font-weight:600;font-size:1rem;
  border:2px solid transparent;cursor:pointer;transition:.18s ease;white-space:nowrap}
.btn-primary{background:var(--orange);color:#fff;box-shadow:0 6px 20px rgba(242,105,28,.32)}
.btn-primary:hover{background:var(--orange-dk);transform:translateY(-2px)}
.btn-ghost{border-color:rgba(255,255,255,.5);color:#fff}
.btn-ghost:hover{background:rgba(255,255,255,.12);border-color:#fff}

header{position:sticky;top:0;z-index:100;background:rgba(255,255,255,.97);
  backdrop-filter:blur(10px);border-bottom:1px solid var(--line)}
.topbar{background:var(--navy);color:#cfe0f2;font-size:.85rem}
.topbar .wrap{display:flex;justify-content:space-between;align-items:center;gap:1rem;padding:.5rem 0;flex-wrap:wrap}
.topbar a{color:#fff;font-weight:600}
.nav{display:flex;align-items:center;justify-content:space-between;gap:1.5rem;padding:.85rem 0}
.logo{display:flex;align-items:center;gap:.75rem;flex-shrink:0}
.logo-img{height:50px;width:auto;flex-shrink:0}
.logo-txt strong{display:block;color:var(--ink);font-size:1.22rem;font-weight:800;line-height:1.1;letter-spacing:.02em}
.logo-txt span{font-size:.68rem;letter-spacing:.08em;text-transform:uppercase;color:var(--steel);font-weight:600}
.menu{display:flex;gap:.35rem;align-items:center}
.menu>li{list-style:none;position:relative}
.menu a{display:block;padding:.6rem .8rem;border-radius:8px;font-weight:600;font-size:.93rem;color:var(--ink);transition:.15s}
.menu a:hover{background:var(--bg);color:var(--navy-2)}
.has-sub>a::after{content:"▾";margin-left:.3rem;font-size:.7rem;color:var(--steel)}
.sub{position:absolute;top:100%;left:0;min-width:280px;background:#fff;border:1px solid var(--line);
  border-radius:12px;box-shadow:var(--shadow-lg);padding:.45rem;opacity:0;visibility:hidden;transform:translateY(8px);transition:.18s}
.has-sub:hover .sub{opacity:1;visibility:visible;transform:translateY(0)}
.sub li{list-style:none}
.sub a{font-weight:500;font-size:.92rem;padding:.6rem .8rem}
.nav-cta{display:flex;align-items:center;gap:.8rem;flex-shrink:0}
.burger{display:none;background:none;border:0;font-size:1.7rem;color:var(--navy);cursor:pointer;padding:.2rem .4rem}

.hero{position:relative;color:#fff;padding:clamp(4.5rem,11vw,8.5rem) 0 clamp(4rem,8vw,6rem);
  background:linear-gradient(rgba(8,23,44,.88),rgba(8,23,44,.74)),
    url('img/hero.webp') center/cover no-repeat #0d2340}
.hero h1{color:#fff;font-size:clamp(2rem,5.2vw,3.45rem);font-weight:800;max-width:17ch}
.hero h1 em{font-style:normal;color:#ffb37a}
.hero p{color:#d6e3f2;font-size:clamp(1rem,1.9vw,1.2rem);max-width:58ch;margin:1.4rem 0 2.2rem}
.hero-btns{display:flex;gap:.9rem;flex-wrap:wrap}
.hero-tags{display:flex;gap:.6rem;flex-wrap:wrap;margin-top:2.6rem}
.hero-tags span{border:1px solid rgba(255,255,255,.28);border-radius:999px;padding:.4rem 1rem;
  font-size:.85rem;color:#e7f0fa;font-weight:500}

.stats{background:var(--navy-2);color:#fff;padding:0}
.stats .wrap{display:grid;grid-template-columns:repeat(4,1fr);gap:1px;background:rgba(255,255,255,.13)}
.stat{background:var(--navy-2);padding:2rem 1.1rem;text-align:center}
.stat b{display:block;font-size:clamp(1.6rem,3.2vw,2.4rem);font-weight:800;color:#fff;line-height:1}
.stat span{display:block;margin-top:.5rem;font-size:.86rem;color:#b9cde4}

.services{background:var(--bg)}
.grid-5{display:grid;grid-template-columns:repeat(5,1fr);gap:1.2rem}
.grid-3{display:grid;grid-template-columns:repeat(3,1fr);gap:1.4rem}
.card{background:#fff;border:1px solid var(--line);border-radius:var(--radius);overflow:hidden;
  transition:.2s;display:flex;flex-direction:column}
.card:hover{transform:translateY(-5px);box-shadow:var(--shadow-lg);border-color:#cdd8e6}
.card-img{aspect-ratio:4/3;background:#dde5ee;overflow:hidden;position:relative}
.card-img img{width:100%;height:100%;object-fit:cover;transition:.4s}
.card:hover .card-img img{transform:scale(1.06)}
.card-num{position:absolute;top:.7rem;left:.7rem;background:var(--orange);color:#fff;
  font-size:.7rem;font-weight:800;letter-spacing:.08em;padding:.25rem .55rem;border-radius:5px;z-index:2}
.card-body{padding:1.25rem 1.2rem 1.4rem;flex:1;display:flex;flex-direction:column}
.card-body h3{margin-bottom:.55rem;font-size:1.03rem}
.card-body p{font-size:.9rem;flex:1}

.band{background:var(--navy);color:#cfe0f2}
.band h2{color:#fff}
.band .plants{display:flex;flex-wrap:wrap;gap:.6rem;margin-top:1.8rem}
.band .plants span{background:rgba(255,255,255,.07);border:1px solid rgba(255,255,255,.14);
  border-radius:8px;padding:.55rem 1rem;font-size:.9rem;color:#e7f0fa}

.proj{position:relative;border-radius:var(--radius);overflow:hidden;aspect-ratio:4/3;background:#0d2340;display:block}
.proj img{width:100%;height:100%;object-fit:cover;transition:.5s;opacity:.88}
.proj:hover img{transform:scale(1.07);opacity:1}
.proj-info{position:absolute;inset:auto 0 0 0;padding:1.6rem 1.3rem 1.15rem;color:#fff;
  background:linear-gradient(transparent,rgba(6,18,35,.93))}
.proj-info small{color:#ffb37a;font-weight:700;font-size:.73rem;letter-spacing:.1em;text-transform:uppercase}
.proj-info h3{color:#fff;font-size:1.02rem;margin-top:.3rem;font-weight:600}

.certs{background:var(--bg)}
.cert-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:1.4rem}
.cert{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:1.7rem 1.5rem;
  border-top:4px solid var(--orange)}
.cert h3{font-size:1.08rem;margin-bottom:.5rem}
.cert code{display:inline-block;background:var(--bg);border:1px solid var(--line);border-radius:6px;
  padding:.15rem .5rem;font-size:.8rem;color:var(--navy-2);font-weight:600;margin-bottom:.7rem}
.cert p{font-size:.9rem}

.partners{text-align:center}
.p-row{display:grid;grid-template-columns:repeat(6,1fr);gap:1rem;margin-top:2.2rem}
.p-row div{background:#fff;border:1px solid var(--line);border-radius:10px;padding:1.3rem .7rem;
  font-weight:700;color:var(--navy-2);font-size:.92rem;display:grid;place-items:center;min-height:84px;transition:.2s}
.p-row div:hover{border-color:var(--orange);color:var(--orange-dk);transform:translateY(-3px)}

.trust{background:var(--navy);color:#a9c2dd}
.trust h2{color:#fff}
.t-row{display:grid;grid-template-columns:repeat(5,1fr);gap:1rem;margin-top:2.2rem}
.t-item{background:rgba(255,255,255,.05);border:1px solid rgba(255,255,255,.11);border-radius:12px;padding:1.4rem 1.1rem}
.t-item small{color:var(--orange);font-size:.68rem;letter-spacing:.12em;font-weight:700;text-transform:uppercase}
.t-item b{display:block;color:#fff;font-size:1.12rem;margin-top:.35rem}

.steps{display:grid;grid-template-columns:repeat(5,1fr);gap:1.2rem;margin-top:2.4rem}
.step{padding:1.5rem 1.2rem;background:var(--bg);border-radius:12px;border:1px solid var(--line)}
.step b{display:grid;place-items:center;width:38px;height:38px;border-radius:9px;
  background:var(--orange);color:#fff;font-size:1rem;margin-bottom:.9rem}
.step h3{font-size:1rem;margin-bottom:.4rem}
.step p{font-size:.88rem}

.why-grid{display:grid;grid-template-columns:1.05fr 1fr;gap:3.5rem;align-items:center}
.why-list{list-style:none;margin-top:1.8rem;display:grid;gap:1.3rem}
.why-list li{display:flex;gap:1rem}
.why-list i{flex-shrink:0;width:34px;height:34px;border-radius:9px;background:#fff2e8;
  color:var(--orange-dk);display:grid;place-items:center;font-style:normal;font-weight:800}
.why-list strong{display:block;color:var(--ink);margin-bottom:.15rem}
.why-list p{font-size:.93rem}
.why-img{border-radius:var(--radius);overflow:hidden;box-shadow:var(--shadow-lg)}

.quote{background:var(--bg)}
.quote-grid{display:grid;grid-template-columns:1fr 1.15fr;gap:3.5rem;align-items:start}
.contact-block{display:grid;gap:1.15rem;margin-top:2rem}
.contact-item{display:flex;gap:1rem;align-items:flex-start}
.contact-item i{flex-shrink:0;width:40px;height:40px;border-radius:10px;background:var(--navy);
  color:#fff;display:grid;place-items:center;font-style:normal;font-size:1.05rem}
.contact-item strong{display:block;color:var(--ink)}
.contact-item span{font-size:.94rem}
form{background:#fff;padding:2rem;border-radius:var(--radius);border:1px solid var(--line);box-shadow:var(--shadow)}
.f-row{display:grid;grid-template-columns:1fr 1fr;gap:1rem}
.field{margin-bottom:1.05rem}
.field label{display:block;font-size:.87rem;font-weight:600;color:var(--ink);margin-bottom:.4rem}
.field input,.field select,.field textarea{width:100%;padding:.82rem .95rem;border:1.5px solid var(--line);
  border-radius:9px;font-family:inherit;font-size:.97rem;color:var(--ink);background:#fdfefe;transition:.15s}
.field input:focus,.field select:focus,.field textarea:focus{outline:none;border-color:var(--orange);
  box-shadow:0 0 0 3px rgba(242,105,28,.13)}
.field textarea{resize:vertical;min-height:96px}
form .btn{width:100%;margin-top:.4rem}
.form-note{font-size:.83rem;text-align:center;margin-top:.9rem;color:var(--steel)}

footer{background:var(--navy);color:#a9c2dd;padding-top:3.5rem;font-size:.93rem}
.f-grid{display:grid;grid-template-columns:1.7fr 1fr 1fr 1.2fr;gap:2.5rem;padding-bottom:2.5rem}
footer h4{color:#fff;font-size:1rem;margin-bottom:1.1rem}
footer ul{list-style:none;display:grid;gap:.6rem}
footer a:hover{color:#fff}
.f-logo{display:flex;align-items:center;gap:.75rem;margin-bottom:1.1rem}
.logo-badge{background:#fff;border-radius:10px;padding:7px 9px;display:inline-grid;place-items:center}
.logo-badge img{height:38px;width:auto}
.f-logo strong{color:#fff;font-size:1.15rem;letter-spacing:.02em}
.f-meta{margin-top:1rem;font-size:.86rem;display:grid;gap:.3rem;color:#8fabc9}
.f-bottom{border-top:1px solid rgba(255,255,255,.12);padding:1.3rem 0;display:flex;
  justify-content:space-between;gap:1rem;flex-wrap:wrap;font-size:.86rem}

.fab{position:fixed;right:18px;bottom:18px;z-index:200;display:none;gap:.6rem;flex-direction:column}
.fab a{width:54px;height:54px;border-radius:50%;display:grid;place-items:center;color:#fff;
  font-size:1.4rem;box-shadow:0 8px 22px rgba(0,0,0,.28)}
.fab .call{background:var(--orange);animation:pulse 2.2s infinite}
.fab .zalo{background:#0068ff;font-size:.82rem;font-weight:800}
@keyframes pulse{0%,100%{box-shadow:0 8px 22px rgba(242,105,28,.5)}50%{box-shadow:0 8px 34px rgba(242,105,28,.85)}}

@media(max-width:1024px){
  .grid-5{grid-template-columns:repeat(3,1fr)}
  .cert-grid{grid-template-columns:1fr}
  .steps,.t-row{grid-template-columns:repeat(2,1fr)}
  .p-row{grid-template-columns:repeat(3,1fr)}
  .f-grid{grid-template-columns:1fr 1fr}
}
@media(max-width:860px){
  .burger{display:block}
  .menu{display:none;position:absolute;top:100%;left:0;right:0;background:#fff;flex-direction:column;
    align-items:stretch;padding:.8rem;gap:.15rem;border-bottom:1px solid var(--line);box-shadow:var(--shadow-lg)}
  .menu.open{display:flex}
  .sub{position:static;opacity:1;visibility:visible;transform:none;box-shadow:none;border:0;padding:0 0 .4rem 1rem}
  .nav-cta .btn{display:none}
  .stats .wrap{grid-template-columns:repeat(2,1fr)}
  .grid-3{grid-template-columns:repeat(2,1fr)}
  .why-grid,.quote-grid{grid-template-columns:1fr;gap:2.5rem}
  .fab{display:flex}
}
@media(max-width:600px){
  body{font-size:16px}
  .grid-5,.grid-3,.steps,.t-row{grid-template-columns:1fr}
  .p-row{grid-template-columns:repeat(2,1fr)}
  .f-grid{grid-template-columns:1fr;gap:2rem}
  .f-row{grid-template-columns:1fr}
  .topbar .wrap{justify-content:center;font-size:.79rem}
  .hero-btns .btn{flex:1}
}

/* ==== bo sung cho cac trang con ==== */
.page-head{background:linear-gradient(rgba(8,23,44,.9),rgba(8,23,44,.8)),var(--hero) center/cover no-repeat #0d2340;color:#fff;padding:clamp(3.5rem,8vw,6rem) 0 clamp(3rem,6vw,4.5rem)}
.page-head h1{color:#fff;font-size:clamp(1.8rem,4.4vw,3rem);max-width:20ch}
.page-head p{color:#d6e3f2;max-width:62ch;margin-top:1.1rem;font-size:1.05rem}
.crumb{font-size:.85rem;color:#a9c2dd;margin-bottom:1rem}
.crumb a:hover{color:#fff}
.prose{max-width:820px}
.prose h2{margin:2.6rem 0 1rem;font-size:clamp(1.35rem,2.6vw,1.85rem)}
.prose h3{margin:1.8rem 0 .6rem;font-size:1.1rem}
.prose p{margin-bottom:1rem}
.prose ul,.prose ol{margin:0 0 1.2rem 1.2rem}
.prose li{margin-bottom:.5rem}
.prose strong{color:var(--ink)}
.layout{display:grid;grid-template-columns:1fr 340px;gap:3.5rem;align-items:start}
.side{position:sticky;top:110px;display:grid;gap:1.2rem}
.side-box{background:var(--bg);border:1px solid var(--line);border-radius:var(--radius);padding:1.5rem}
.side-box h3{font-size:1.05rem;margin-bottom:.8rem}
.side-box ul{list-style:none;display:grid;gap:.5rem}
.side-box a{font-size:.93rem;font-weight:500}
.side-box a:hover{color:var(--orange-dk)}
.side-cta{background:var(--navy);color:#cfe0f2;border-color:var(--navy)}
.side-cta h3{color:#fff}
.side-cta p{font-size:.92rem;margin-bottom:1rem}
.side-cta .btn{width:100%}
.tbl{width:100%;border-collapse:collapse;font-size:.93rem;margin:1.2rem 0 1.6rem}
.tbl th,.tbl td{padding:.7rem .8rem;border-bottom:1px solid var(--line);text-align:left;vertical-align:top}
.tbl th{background:var(--bg);color:var(--ink);font-weight:700;font-size:.85rem;text-transform:uppercase;letter-spacing:.04em}
.tbl tr:hover td{background:#fafbfd}
.faq{border:1px solid var(--line);border-radius:12px;overflow:hidden;margin-bottom:.7rem}
.faq summary{padding:1rem 1.2rem;font-weight:600;color:var(--ink);cursor:pointer;background:var(--bg);list-style:none}
.faq summary::-webkit-details-marker{display:none}
.faq summary::after{content:"+";float:right;color:var(--orange);font-weight:800}
.faq[open] summary::after{content:"−"}
.faq div{padding:1rem 1.2rem;font-size:.95rem}
.gal{display:grid;grid-template-columns:repeat(3,1fr);gap:1rem;margin:1.5rem 0}
.gal img{border-radius:10px;aspect-ratio:4/3;object-fit:cover;width:100%}
.chips{display:flex;gap:.5rem;flex-wrap:wrap;margin-bottom:2rem}
.chip{border:1.5px solid var(--line);background:#fff;border-radius:999px;padding:.5rem 1.1rem;
  font-size:.9rem;font-weight:600;color:var(--body);cursor:pointer;transition:.15s}
.chip:hover{border-color:var(--steel)}
.chip.on{background:var(--navy);border-color:var(--navy);color:#fff}
@media(max-width:960px){.layout{grid-template-columns:1fr;gap:2.5rem}.side{position:static}}
@media(max-width:600px){.gal{grid-template-columns:1fr 1fr}.tbl{font-size:.85rem}.tbl th,.tbl td{padding:.55rem .5rem}}