:root{
  --navy:#0E2747;--navy-2:#163A66;--blue:#1F55A3;--orange:#F28A30;--orange-d:#E07418;--leaf:#5FA637;
  --ink:#16202B;--text:#3A4652;--muted:#6B7783;--line:#DCE2E8;--bg:#F3F5F8;--white:#fff;
  --font:"Be Vietnam Pro",system-ui,-apple-system,"Segoe UI",sans-serif;
  --r:10px;--shadow:0 1px 2px rgba(14,39,71,.06),0 8px 24px rgba(14,39,71,.08);
}
*{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth}
body{font-family:var(--font);color:var(--text);background:var(--white);font-size:16.5px;line-height:1.65;-webkit-font-smoothing:antialiased}
img,svg{display:block;max-width:100%;height:auto}
a{color:inherit}
:focus-visible{outline:3px solid var(--orange);outline-offset:3px}
.wrap{width:min(1200px,100% - 40px);margin-inline:auto}
.wrap>*,.split>*{min-width:0}
h1,h2,h3{color:var(--ink);font-weight:700;letter-spacing:-.01em}

/* top bar */
.topbar{background:var(--navy);color:#C9D6E6;font-size:13.5px}
.topbar .wrap{display:flex;gap:26px;align-items:center;height:38px}
.topbar a{text-decoration:none;color:#fff;font-weight:600}
.topbar span{display:inline-flex;gap:7px;align-items:center}
.topbar svg{width:14px;height:14px;flex:none}
.topbar .addr{margin-left:auto}

/* header */
.top{position:sticky;top:0;z-index:40;background:#fff;border-bottom:1px solid var(--line);transition:box-shadow .2s}
.top.scrolled{box-shadow:0 6px 20px rgba(14,39,71,.08)}
.top .wrap{display:flex;align-items:center;gap:22px;height:86px}
.brand{display:flex;align-items:center;gap:12px;text-decoration:none}
.brand img{height:72px;width:72px}
.brand span{display:grid;line-height:1.2}
.brand b{font-size:15.5px;line-height:1.25;color:var(--blue);font-weight:800;letter-spacing:.01em;white-space:nowrap}
.brand small{margin-top:3px}
.brand small{font-size:12.5px;color:var(--muted)}
.nav{display:flex;gap:4px;margin-left:auto}
.nav a{text-decoration:none;font-size:15px;font-weight:600;color:var(--ink);padding:9px 10px;border-radius:6px;white-space:nowrap}
.nav a:hover{background:var(--bg);color:var(--blue)}
.nav a[aria-current="page"]{color:var(--blue);background:#EAF1FB}
.menu-btn{display:none;margin-left:auto;background:#fff;border:1px solid var(--line);border-radius:8px;padding:10px 14px;font:600 15px var(--font);color:var(--ink);cursor:pointer}
.btn{display:inline-flex;align-items:center;justify-content:center;gap:9px;font:700 15.5px/1 var(--font);padding:15px 22px;border-radius:8px;text-decoration:none;border:2px solid transparent;cursor:pointer;transition:background .15s,color .15s,border-color .15s}
.btn svg{width:18px;height:18px}
.btn-call{background:var(--orange);color:#fff}
.btn-call:hover{background:var(--orange-d)}
.btn-ghost{border-color:currentColor;color:var(--ink);background:transparent}
.btn-ghost:hover{background:var(--ink);color:#fff;border-color:var(--ink)}
.btn-light{border-color:rgba(255,255,255,.7);color:#fff}
.btn-light:hover{background:#fff;color:var(--navy);border-color:#fff}
.top .btn{padding:12px 18px;font-size:15px}

/* sections */
section{padding:88px 0}
.bg{background:var(--bg)}
.navy{background:var(--navy);color:#C9D6E6}
.navy h2,.navy h3{color:#fff}
.sec-head{display:flex;justify-content:space-between;align-items:end;gap:24px;margin-bottom:40px;flex-wrap:wrap}
.kicker{display:inline-flex;align-items:center;gap:10px;font-size:14px;font-weight:700;color:var(--orange);margin-bottom:10px}
.kicker::before{content:"";width:28px;height:3px;background:var(--orange);border-radius:2px}
.h2{font-size:clamp(28px,3.4vw,40px);line-height:1.18;max-width:24ch}
.intro{color:var(--muted);max-width:62ch;margin-top:12px;font-size:17px}
.navy .intro{color:#AFC0D4}
.more{display:inline-flex;align-items:center;gap:8px;font-weight:700;color:var(--blue);text-decoration:none}
.more:hover{text-decoration:underline}

/* hero */
.hero{position:relative;padding:0;color:#fff;background:var(--navy) center/cover no-repeat;overflow:hidden}
.hero::before{content:"";position:absolute;inset:0;background:linear-gradient(90deg,rgba(10,30,56,.94) 0%,rgba(10,30,56,.82) 42%,rgba(10,30,56,.25) 100%)}
.hero .wrap{position:relative;padding:110px 0 150px}
.hero h1{color:#fff;font-size:clamp(36px,5vw,62px);line-height:1.08;font-weight:800;max-width:15ch;letter-spacing:-.02em}
.hero .lead{font-size:clamp(17px,1.6vw,19.5px);color:#D5E0EC;margin:22px 0 34px;max-width:52ch}
.actions{display:flex;flex-wrap:wrap;gap:12px}
.hero .tag{display:inline-block;background:rgba(242,138,48,.16);border:1px solid rgba(242,138,48,.5);color:#FFC48F;font-size:14px;font-weight:600;padding:6px 14px;border-radius:999px;margin-bottom:22px}

/* trust bar */
.trust{position:relative;z-index:2;margin-top:-72px;padding:0}
.trust .grid{display:grid;grid-template-columns:repeat(4,1fr);background:#fff;border-radius:var(--r);box-shadow:var(--shadow);overflow:hidden}
.trust .item{display:flex;gap:16px;align-items:center;padding:26px 24px;border-right:1px solid var(--line)}
.trust .item:last-child{border-right:0}
.trust .ic{width:50px;height:50px;border-radius:12px;background:#EAF1FB;display:grid;place-items:center;flex:none}
.trust .ic svg{width:26px;height:26px}
.trust b{display:block;color:var(--ink);font-size:17px;line-height:1.25}
.trust span{font-size:14px;color:var(--muted)}

/* main lines */
.lines{display:grid;grid-template-columns:1fr 1fr;gap:28px}
.line-card{position:relative;display:block;border-radius:var(--r);overflow:hidden;min-height:420px;text-decoration:none;color:#fff;box-shadow:var(--shadow)}
.line-card img{position:absolute;inset:0;width:100%;height:100%;object-fit:cover;transition:transform .5s}
.line-card:hover img{transform:scale(1.04)}
.line-card::after{content:"";position:absolute;inset:0;background:linear-gradient(180deg,rgba(10,30,56,0) 25%,rgba(10,30,56,.92) 100%)}
.line-card .t{position:absolute;left:0;right:0;bottom:0;z-index:1;padding:30px}
.line-card .num{display:inline-block;background:var(--orange);color:#fff;font-size:13px;font-weight:700;padding:4px 10px;border-radius:999px;margin-bottom:12px}
.line-card h3{color:#fff;font-size:28px;line-height:1.2}
.line-card p{color:#D5E0EC;margin-top:8px;max-width:48ch}
.line-card .go{display:inline-block;margin-top:14px;font-weight:700;color:#FFC48F}

/* product grid */
.pgrid{display:grid;grid-template-columns:repeat(auto-fill,minmax(210px,1fr));gap:22px}
.pcard{background:#fff;border:1px solid var(--line);border-radius:var(--r);overflow:hidden;text-decoration:none;display:flex;flex-direction:column;transition:box-shadow .2s,transform .2s}
.pcard:hover{box-shadow:var(--shadow);transform:translateY(-3px)}
.pcard .pic{position:relative;aspect-ratio:4/3;background:var(--bg);overflow:hidden}
.pcard .pic img{position:absolute;inset:0;width:100%;height:100%;object-fit:cover}
.pcard .t{padding:18px 18px 20px;display:flex;flex-direction:column;flex:1}
.pcard h3{font-size:18px;line-height:1.3}
.pcard p{font-size:14.5px;color:var(--muted);margin-top:6px;flex:1}
.pcard .go{margin-top:14px;font-size:14.5px;font-weight:700;color:var(--blue)}
.recent{grid-template-columns:repeat(3,1fr)}

/* why */
.why{display:grid;grid-template-columns:repeat(4,1fr);gap:22px}
.why div{background:#fff;border-radius:var(--r);padding:28px 24px;border:1px solid var(--line)}
.why .ic{width:54px;height:54px;border-radius:14px;background:var(--navy);display:grid;place-items:center;margin-bottom:18px}
.why .ic svg{width:28px;height:28px}
.why h3{font-size:18.5px;line-height:1.3}
.why p{font-size:15px;color:var(--muted);margin-top:8px}

/* steps */
.steps{display:grid;grid-template-columns:repeat(5,1fr);gap:20px;counter-reset:s}
.step{counter-increment:s;background:rgba(255,255,255,.05);border:1px solid rgba(255,255,255,.12);border-radius:var(--r);padding:26px 22px}
.step::before{content:counter(s);display:grid;place-items:center;width:46px;height:46px;border-radius:50%;background:var(--orange);color:#fff;font-weight:800;font-size:19px;margin-bottom:16px}
.step h3{font-size:18px;color:#fff}
.step p{font-size:14.5px;color:#AFC0D4;margin-top:6px}
.bg .step,.light-steps .step{background:#fff;border-color:var(--line)}
.bg .step h3,.light-steps .step h3{color:var(--ink)}
.bg .step p,.light-steps .step p{color:var(--muted)}

/* article cards */
.agrid{display:grid;grid-template-columns:1fr 1fr;gap:20px}
.acard{display:flex;flex-direction:column;background:#fff;border:1px solid var(--line);border-left:4px solid var(--blue);border-radius:var(--r);padding:24px 26px;text-decoration:none;transition:box-shadow .2s}
.acard:hover{box-shadow:var(--shadow)}
.acard h3{font-size:19px;line-height:1.35}
.acard p{color:var(--muted);font-size:15px;margin-top:6px;flex:1}
.acard span{margin-top:14px;font-weight:700;color:var(--blue);font-size:14.5px}

/* CTA */
.cta{position:relative;padding:72px 0;background:var(--blue) center/cover;color:#fff;overflow:hidden}
.cta::before{content:"";position:absolute;inset:0;background:linear-gradient(90deg,rgba(14,39,71,.95),rgba(31,85,163,.85))}
.cta .wrap{position:relative;display:flex;flex-wrap:wrap;gap:28px;align-items:center;justify-content:space-between}
.cta h2{color:#fff;font-size:clamp(26px,3vw,36px);line-height:1.2;max-width:22ch}
.cta p{color:#D5E0EC;margin-top:10px}
.cta .tel{display:block;font-size:clamp(30px,3.6vw,44px);font-weight:800;color:#fff;text-decoration:none;letter-spacing:-.01em;margin-bottom:12px}

/* page head */
.page-head{position:relative;background:var(--navy) center/cover;padding:64px 0 70px;color:#fff}
.page-head::before{content:"";position:absolute;inset:0;background:linear-gradient(90deg,rgba(10,30,56,.95),rgba(10,30,56,.78))}
.page-head .wrap{position:relative}
.crumbs{font-size:14px;color:#AFC0D4;margin-bottom:16px}
.crumbs a{text-decoration:none;color:#fff}
.crumbs a:hover{text-decoration:underline}
.page-head h1{color:#fff;font-size:clamp(30px,4.2vw,48px);line-height:1.15;max-width:24ch;font-weight:800}
.page-head .lead{font-size:18px;color:#D5E0EC;margin-top:14px;max-width:62ch}

/* rows (services) */
.rows{display:grid;gap:16px}
.row{display:grid;grid-template-columns:64px 1fr 1.1fr;gap:24px;padding:24px 26px;border:1px solid var(--line);border-radius:var(--r);background:#fff;align-items:center;text-decoration:none;transition:box-shadow .2s}
a.row:hover{box-shadow:var(--shadow)}
.row .ic{width:60px;height:60px;border-radius:14px;background:#EAF1FB;display:grid;place-items:center}
.row .ic svg{width:34px;height:34px}
.row h3{font-size:19px;line-height:1.3}
.row p{color:var(--muted);margin-top:4px;font-size:15px}
.tags{list-style:none;display:flex;flex-wrap:wrap;gap:8px}
.tags li{font-size:13.5px;background:var(--bg);border:1px solid var(--line);padding:5px 12px;border-radius:999px;color:var(--ink)}
.tags li.hl{background:#FFF1E4;border-color:#F8C99C;color:#A4510D;font-weight:600}

/* split / detail */
.split{display:grid;grid-template-columns:1fr 1fr;gap:52px;align-items:start}
.split figure img,.split>div>img{width:100%;border-radius:var(--r);box-shadow:var(--shadow);background:#fff}
.split figure img{max-height:680px;object-fit:cover}
.spec{background:#fff;border:1px solid var(--line);border-radius:var(--r);padding:8px 26px 26px;box-shadow:var(--shadow)}
.spec h2{font-size:21px;margin:18px 0 6px}
.spec-list{display:grid}
.spec-list div{display:grid;grid-template-columns:140px 1fr;gap:14px;border-bottom:1px solid var(--line);padding:13px 0}
.spec-list dt{color:var(--muted);font-size:14.5px}
.spec-list dd{color:var(--ink);font-weight:500}
.cap{font-size:13.5px;color:var(--muted);margin-top:10px}
.note{font-size:13.5px;color:var(--muted);margin-top:8px}

/* tables */
.tbl{overflow-x:auto;border:1px solid var(--line);background:#fff;border-radius:var(--r);margin-top:20px;box-shadow:var(--shadow)}
.tbl table{border-collapse:collapse;width:100%;font-size:14px;white-space:nowrap}
.tbl th{background:var(--navy);color:#fff;font-weight:600;text-align:left;padding:12px 14px;font-size:13px;line-height:1.35}
.tbl td{padding:10px 14px;border-top:1px solid var(--line);font-variant-numeric:tabular-nums;color:var(--ink)}
.tbl tr:nth-child(even) td{background:#F8FAFC}
.tbl tr:hover td{background:#EEF4FC}
.tbl td:first-child{font-weight:700;color:var(--blue)}

/* prose */
.prose{max-width:74ch}
.prose h2{font-size:26px;line-height:1.25;margin:40px 0 12px}
.prose h3{font-size:18px;margin:24px 0 6px}
.prose p,.prose li{color:var(--text)}
.prose p+p{margin-top:12px}
.prose ul,.prose ol{padding-left:22px;margin-top:10px;display:grid;gap:7px}
.prose a{color:var(--blue);font-weight:600}
.prose .tbl{width:min(1200px,calc(100vw - 40px))}
.answer{background:#FFF7EF;border-left:5px solid var(--orange);border-radius:0 var(--r) var(--r) 0;padding:20px 24px;font-size:17.5px;color:var(--ink);margin-bottom:8px}
.formula{font-family:ui-monospace,Consolas,monospace;background:var(--bg);border:1px solid var(--line);padding:14px 18px;border-radius:8px;margin:12px 0;font-size:15px;overflow-x:auto;color:var(--ink)}
.faq h3{background:#fff;border:1px solid var(--line);border-radius:8px 8px 0 0;padding:14px 18px;margin:16px 0 0;font-size:16.5px}
.faq h3+p{border:1px solid var(--line);border-top:0;border-radius:0 0 8px 8px;padding:12px 18px;background:#FBFCFD;margin:0}

/* projects */
.proj{display:grid;grid-template-columns:1.25fr 1fr;gap:44px;align-items:start;padding:44px;background:#fff;border:1px solid var(--line);border-radius:var(--r);margin-bottom:28px;box-shadow:var(--shadow)}
.proj img{width:100%;object-fit:cover;border-radius:8px}
.proj .thumbs{margin-top:12px}
.proj .thumbs img{max-height:320px}
.proj h2{font-size:26px;line-height:1.25;margin-bottom:10px}
.badge{display:inline-block;background:var(--leaf);color:#fff;font-size:13px;font-weight:700;padding:4px 12px;border-radius:999px;margin-bottom:12px}

/* workshop */
.shop-list{display:grid;grid-template-columns:1fr 1fr;gap:14px}
.shop-list div{background:rgba(255,255,255,.05);border:1px solid rgba(255,255,255,.12);border-radius:var(--r);padding:20px}
.shop-list b{display:block;color:#fff;font-size:17px}
.shop-list span{font-size:14px;color:#AFC0D4}
.ticks{margin-top:24px;display:grid;gap:12px}
.ticks p{padding-left:30px;position:relative}
.ticks p::before{content:"";position:absolute;left:0;top:.35em;width:18px;height:18px;border-radius:50%;background:var(--leaf) url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 16 16'%3E%3Cpath d='M4 8.5l2.5 2.5L12 5.5' fill='none' stroke='white' stroke-width='2'/%3E%3C/svg%3E") center/12px no-repeat}
.navy .ticks p{color:#DDE6F0}

/* values */
.vgrid{display:grid;grid-template-columns:repeat(4,1fr);gap:20px}
.vgrid div{background:#fff;border:1px solid var(--line);border-top:4px solid var(--leaf);border-radius:var(--r);padding:24px}
.vgrid h3{font-size:18px}
.vgrid p{font-size:15px;color:var(--muted);margin-top:6px}

/* contact */
.contact-grid{display:grid;grid-template-columns:1fr 1fr;gap:48px}
.phone-big{font-size:clamp(34px,4.4vw,52px);font-weight:800;color:var(--ink);line-height:1;margin:6px 0 10px;display:inline-block;text-decoration:none;letter-spacing:-.02em}
.facts{margin-top:22px;display:grid}
.facts div{display:grid;grid-template-columns:110px 1fr;gap:14px;border-bottom:1px solid var(--line);padding:14px 0}
.facts dt{color:var(--muted);font-size:14.5px}
.facts dd{color:var(--ink)}
.facts a{color:var(--blue);font-weight:600}
form{background:#fff;border:1px solid var(--line);border-radius:var(--r);box-shadow:var(--shadow);padding:32px;display:grid;gap:16px;align-self:start}
form h2{font-size:24px}
label{display:grid;gap:6px;font-size:14px;font-weight:600;color:var(--ink)}
input,select,textarea{font:16px var(--font);padding:13px 14px;border:1px solid var(--line);border-radius:8px;background:#FBFCFD;color:var(--ink)}
input:focus,select:focus,textarea:focus{outline:2px solid var(--blue);border-color:var(--blue)}
textarea{min-height:110px;resize:vertical}
.done{display:none;background:#EAF1FB;padding:14px;border-radius:8px;font-size:15px;color:var(--ink)}

/* footer */
footer{background:#0A1E38;color:#AFC0D4;padding:60px 0 28px;font-size:15px}
.fgrid{display:grid;grid-template-columns:1.5fr 1fr 1fr;gap:40px}
.flogo{display:inline-block;background:#fff;border-radius:50%;padding:6px;margin-bottom:18px}
.flogo img{height:110px;width:110px}
footer b{color:#fff;font-weight:700;display:block;margin-bottom:12px;font-size:16px}
footer a{text-decoration:none}
footer a:hover{color:#fff}
footer ul{list-style:none;display:grid;gap:8px}
footer p{margin-bottom:6px}
.fbottom{margin-top:40px;padding-top:20px;border-top:1px solid #1E3657;font-size:13.5px;display:flex;justify-content:space-between;gap:12px;flex-wrap:wrap}

/* floating contact */
.float{position:fixed;right:20px;bottom:24px;z-index:50;display:grid;gap:12px}
.float a{width:56px;height:56px;border-radius:50%;display:grid;place-items:center;box-shadow:0 8px 20px rgba(0,0,0,.2);text-decoration:none;color:#fff;font-weight:800;font-size:13px}
.float .f-zalo{background:#0068FF}
.float .f-call{background:var(--orange)}
.float svg{width:26px;height:26px}
.mbar{display:none}

/* gallery */
.gal{display:grid;grid-template-columns:1fr 1fr;gap:20px;margin-top:14px}
.gal img{width:100%;aspect-ratio:3/4;object-fit:cover;border-radius:8px}

@media (max-width:1240px){
  .nav{display:none;position:absolute;top:86px;left:0;right:0;background:#fff;flex-direction:column;gap:0;padding:8px 20px 18px;border-bottom:1px solid var(--line);box-shadow:var(--shadow)}
  .nav.open{display:flex}
  .nav a{padding:13px 8px;border-bottom:1px solid var(--line);border-radius:0}
  .menu-btn{display:block}
  .top .btn{display:none}
  .topbar .addr{display:none}
}
@media (max-width:960px){
  .trust .grid{grid-template-columns:1fr 1fr}
  .trust .item:nth-child(2){border-right:0}
  .trust .item:nth-child(-n+2){border-bottom:1px solid var(--line)}
  .why,.vgrid{grid-template-columns:1fr 1fr}
  .steps{grid-template-columns:1fr 1fr}
  .split,.contact-grid,.proj,.lines,.recent,.agrid{grid-template-columns:1fr}
  .proj{padding:22px;gap:22px}
  .row{grid-template-columns:60px 1fr;gap:16px}
  .row .tags{grid-column:2}
  .fgrid{grid-template-columns:1fr}
  section{padding:60px 0}
  .hero .wrap{padding:70px 0 120px}
  .hero::before{background:linear-gradient(180deg,rgba(10,30,56,.88),rgba(10,30,56,.78))}
  .line-card{min-height:360px}
}
@media (max-width:640px){
  .topbar .mail{display:none}
  .brand img{height:56px;width:56px}
  .brand b{font-size:13px}
  .brand small{display:none}
  .top .wrap{height:70px}
  .nav{top:70px}
  .trust .grid,.why,.vgrid,.steps,.shop-list{grid-template-columns:1fr}
  .trust .item{border-right:0;border-bottom:1px solid var(--line)}
  .spec-list div,.facts div{grid-template-columns:1fr;gap:2px}
  form{padding:22px}
  .float{display:none}
  body{padding-bottom:60px}
  .mbar{display:grid;grid-template-columns:1fr 1fr;position:fixed;inset:auto 0 0 0;z-index:50;height:60px;box-shadow:0 -4px 16px rgba(0,0,0,.12)}
  .mbar a{display:flex;align-items:center;justify-content:center;gap:8px;font-weight:700;text-decoration:none;color:#fff}
  .mbar a:first-child{background:var(--orange)}
  .mbar a:last-child{background:#0068FF}
  .mbar svg{width:20px;height:20px}
  .gal{grid-template-columns:1fr}
}
@media (prefers-reduced-motion:reduce){*{transition:none!important}}