:root{--ink:#1b2430;--steel:#2b3a4a;--accent:#c0302b;--bg:#fff;--alt:#f0f2f4;--line:#d8dde2}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{margin:0;font:16px/1.6 system-ui,-apple-system,"Segoe UI",Roboto,sans-serif;color:var(--ink);background:var(--bg)}
a{color:inherit}
.wrap{max-width:1100px;margin:0 auto;padding:0 16px}
.draft-bar{background:#fff3cd;color:#664d03;text-align:center;font-size:13px;padding:6px 12px}
.top{position:sticky;top:0;background:#fff;border-bottom:1px solid var(--line);z-index:10}
.bar{display:flex;align-items:center;gap:16px;min-height:60px;justify-content:space-between}
.brand{font-weight:700;text-decoration:none;display:flex;align-items:center;gap:8px}
.logo{height:64px;width:auto}
nav{display:flex;gap:18px}
nav a{text-decoration:none;font-size:15px}
nav a:hover{color:var(--accent)}
.btn{display:inline-block;background:var(--accent);color:#fff;border:0;padding:12px 22px;border-radius:6px;font:600 16px inherit;font-family:inherit;text-decoration:none;cursor:pointer}
.btn.small{padding:8px 14px;font-size:14px}
.btn.ghost{background:transparent;border:2px solid #fff}
.hero{background:linear-gradient(90deg,rgba(18,26,36,.92) 0%,rgba(18,26,36,.75) 50%,rgba(18,26,36,.25) 100%),url(img/hero.jpg) center/cover;color:#fff;padding:72px 0}
.hero h1{font-size:clamp(28px,5vw,46px);line-height:1.2;margin:0 0 12px}
.hero p{max-width:620px;opacity:.9}
.cta{display:flex;flex-wrap:wrap;gap:10px;margin-top:20px}
.sec{padding:48px 16px}
.alt{background:var(--alt);padding:48px 0}
h2{font-size:28px;margin:0 0 8px}
.note{color:#6b7782;font-size:14px}
.grid{display:grid;gap:18px;grid-template-columns:repeat(auto-fill,minmax(300px,1fr));margin-top:20px}
.grid.four{grid-template-columns:repeat(auto-fit,minmax(220px,1fr))}
.card{border:1px solid var(--line);border-radius:10px;padding:16px;background:#fff}
.card h3{margin:12px 0 4px}
.img{height:150px;border-radius:8px;background:repeating-linear-gradient(45deg,#e4e8ec,#e4e8ec 10px,#eef1f3 10px,#eef1f3 20px);display:flex;align-items:center;justify-content:center;color:#6b7782;font-size:14px}
table{width:100%;border-collapse:collapse;font-size:14px;margin:10px 0 14px}
th,td{text-align:left;padding:6px 4px;border-bottom:1px solid var(--line);vertical-align:top}
th{width:46%;font-weight:600;color:var(--steel)}
.why{background:#fff;border-radius:8px;padding:16px;border-left:4px solid var(--accent)}
.why b,.why span{display:block}
.why span{color:#6b7782;font-size:14px}
.form{display:grid;gap:12px;max-width:520px;margin-top:16px}
.form label{display:grid;gap:4px;font-weight:600;font-size:14px}
input,select,textarea{font:inherit;padding:10px;border:1px solid #b9c1c8;border-radius:6px;width:100%}
.two{display:grid;gap:24px;grid-template-columns:1fr 1fr}
.map{min-height:240px;background:#dfe4e8;border-radius:8px;display:flex;align-items:center;justify-content:center;color:#6b7782;text-align:center;padding:16px}
footer{background:var(--ink);color:#c9d1d8;padding:20px 0;font-size:14px}
.float{position:fixed;right:12px;bottom:12px;display:flex;flex-direction:column;gap:8px;z-index:20}
.fl{color:#fff;text-decoration:none;font-weight:700;padding:12px 16px;border-radius:30px;text-align:center;box-shadow:0 2px 8px rgba(0,0,0,.25)}
.call{background:#2e9e4f}.zalo{background:#0068ff}
@media(max-width:760px){nav{display:none}.two{grid-template-columns:1fr}.hero{padding:44px 0}}
.img{overflow:hidden}.img img{width:100%;height:100%;object-fit:cover}
.logo-tile{height:110px;border:1px solid var(--line);border-radius:8px;background:#fff;display:flex;align-items:center;justify-content:center;padding:10px}
.logo-tile img{max-width:100%;max-height:100%;object-fit:contain}
.grid.logos{grid-template-columns:repeat(auto-fit,minmax(150px,1fr))}
.tablewrap{overflow-x:auto;margin:12px 0}
.plist{background:#fff;font-size:15px}.plist th{width:auto;background:#e4e8ec;padding:8px}.plist td{padding:8px}
.intro{max-width:780px}.intro p{margin:0 0 12px}
.hero h1 span{display:block;font-size:.42em;letter-spacing:.04em;margin-top:10px;font-weight:600}
.quote{font-style:italic;color:var(--accent);font-weight:600}
.img img.contain{object-fit:contain;background:#fff}
.card .btn.small{margin:2px 4px 2px 0}
.cert{max-width:760px;width:100%;border:1px solid var(--line);border-radius:8px;display:block;margin:12px 0}
.proj{columns:2;padding-left:20px}
iframe.map{border:0;min-height:300px;width:100%;border-radius:8px}
@media(max-width:760px){.proj{columns:1}}
.btn.red{background:#c0302b}
.more[hidden]{display:none}.more h3{margin:16px 0 4px;color:var(--steel)}
.certs{display:grid;gap:16px;grid-template-columns:repeat(auto-fit,minmax(300px,1fr));margin-top:12px}
.marquee{overflow:hidden;background:#fff;border-top:1px solid var(--line);padding:14px 0}
.track{display:flex;width:max-content;gap:48px;animation:run 35s linear infinite}
.track span{height:56px;display:flex;align-items:center}
.track img{max-height:56px;max-width:140px;object-fit:contain}
.marquee:hover .track{animation-play-state:paused}
@keyframes run{to{transform:translateX(-50%)}}
@media(prefers-reduced-motion:reduce){.track{animation:none}.marquee{overflow-x:auto}}
.more ul{margin:0 0 12px;padding-left:20px}
.projcards{grid-template-columns:repeat(auto-fill,minmax(260px,320px))}
.pc{margin:0;border:1px solid var(--line);border-radius:10px;overflow:hidden;background:#fff}
.pc img{width:100%;height:220px;object-fit:cover;display:block}
.pc figcaption{padding:10px 12px;font-weight:600}
.hero2{background:#1b2430;color:#fff}
.hero2 .bia{display:block;width:100%;max-height:70vh;object-fit:cover;object-position:center}
.herobar{padding:28px 0 32px}
.herobar h1{font-size:clamp(26px,4.5vw,40px);line-height:1.2;margin:0 0 8px}
.herobar h1 span{display:block;font-size:.42em;letter-spacing:.04em;margin-top:8px;font-weight:600}
.hero3{color:#fff;padding:90px 0 110px;background:linear-gradient(90deg,rgba(18,26,36,.88) 0%,rgba(18,26,36,.65) 45%,rgba(18,26,36,.1) 100%),url(img/bia.jpg) center 40%/cover}
.hero3 h1{font-size:clamp(28px,5vw,46px);line-height:1.2;margin:0 0 10px}
.hero3 h1 span{display:block;font-size:.42em;letter-spacing:.04em;margin-top:10px;font-weight:600}
.hero3 p{max-width:560px}
@media(max-width:760px){.hero3{padding:56px 0 64px;background-position:62% center}}
.grid.logos{grid-template-columns:repeat(4,1fr);gap:28px 32px;max-width:none}
@media(max-width:560px){.logo-tile{height:72px;padding:6px}.grid.logos{gap:8px}}
.logo-tile{height:120px}
@media(max-width:760px){.logo{height:52px}.grid.logos{gap:14px}.logo-tile{height:90px}}
@media(max-width:560px){.grid.logos{gap:8px}.logo-tile{height:72px}}
nav a.navstrong{text-transform:uppercase;font-weight:800}
nav a{text-transform:uppercase;font-weight:800;font-size:13px;letter-spacing:.01em}
nav{gap:14px}
.menubtn{display:none;background:var(--steel);color:#fff;border:0;border-radius:6px;font-size:22px;line-height:1;padding:8px 12px;cursor:pointer}
@media(max-width:900px){
 .bar{flex-wrap:wrap;gap:8px}
 .menubtn{display:block;order:3}
 .bar .btn.small{order:2;margin-left:auto}
 nav{display:none;order:4;flex-basis:100%;flex-direction:column;gap:0;padding-bottom:8px}
 nav.open{display:flex}
 nav a{padding:12px 4px;border-top:1px solid var(--line);font-size:14px}
 .fl{padding:9px 13px;font-size:14px}
 .float{right:8px;bottom:8px}
}
section[id]{scroll-margin-top:90px}
.logo-tile{overflow:hidden}.logo-tile img{width:100%;height:100%;min-width:0;min-height:0;object-fit:contain}