:root{--navy:#071a2f;--navy2:#0b2744;--steel:#526170;--muted:#f4f7fa;--line:#d9e2ea;--orange:#f97316;--orange2:#fb923c;--white:#fff;--text:#172232;--shadow:0 18px 45px rgba(7,26,47,.13);--radius:22px;--header:78px}*{box-sizing:border-box}html{scroll-behavior:smooth;scroll-padding-top:calc(var(--header) + 18px)}body{margin:0;font-family:Inter,system-ui,-apple-system,Segoe UI,Roboto,Arial,sans-serif;color:var(--text);background:#fff;line-height:1.6;overflow-x:hidden}img{max-width:100%;display:block}a{color:inherit;text-decoration:none}.container{width:min(1180px,calc(100% - 32px));margin:auto}.skip-link{position:absolute;left:-999px;top:8px;background:#fff;color:#000;padding:10px;z-index:20}.skip-link:focus{left:8px}.site-header{position:sticky;top:0;z-index:50;background:rgba(255,255,255,.94);backdrop-filter:blur(16px);box-shadow:0 1px 0 rgba(7,26,47,.08)}.header-inner{min-height:var(--header);display:flex;align-items:center;gap:18px}.brand{display:flex;align-items:center;gap:10px;min-width:max-content}.brand-mark{display:grid;place-items:center;width:46px;height:46px;border-radius:14px;background:linear-gradient(135deg,var(--navy),var(--orange));color:#fff;font-weight:900}.brand strong{display:block;letter-spacing:.4px;color:var(--navy)}.brand small{display:block;color:var(--steel);font-size:11px;font-weight:700}.primary-nav{display:flex;gap:18px;margin-left:auto;font-weight:700;font-size:14px}.primary-nav a{padding:12px 0;color:#263647}.primary-nav a:hover{color:var(--orange)}.header-actions{display:flex;gap:10px}.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;border:0;border-radius:999px;padding:12px 18px;font-weight:800;cursor:pointer;transition:.2s;min-height:44px}.btn-primary{background:linear-gradient(135deg,var(--orange),var(--orange2));color:#fff;box-shadow:0 12px 22px rgba(249,115,22,.25)}.btn-ghost{background:#edf2f7;color:var(--navy)}.btn-light{background:#fff;color:var(--navy)}.btn-outline{border:1px solid rgba(255,255,255,.5);color:#fff}.btn-dark{background:var(--navy);color:#fff}.btn-zalo{background:#0573ff;color:#fff}.btn:hover{transform:translateY(-2px)}.menu-toggle{display:none;margin-left:auto;border:0;background:#eef3f7;border-radius:12px;width:46px;height:42px;padding:10px}.menu-toggle span{display:block;height:2px;background:var(--navy);margin:5px 0}.section{padding:92px 0}.hero{position:relative;min-height:calc(100svh - var(--header));display:grid;align-items:center;background:var(--navy);color:#fff;overflow:hidden}.hero-bg{position:absolute;inset:0;background:radial-gradient(circle at 20% 10%,rgba(249,115,22,.35),transparent 28%),linear-gradient(115deg,rgba(7,26,47,.95),rgba(7,26,47,.76)),url('../images/stock/stock-construction-site.svg') center/cover;opacity:1}.hero-grid{position:relative;display:grid;grid-template-columns:1.04fr .96fr;gap:48px;align-items:center}.eyebrow{margin:0 0 12px;color:var(--orange);font-weight:900;letter-spacing:.18em;text-transform:uppercase;font-size:13px}.hero h1{font-size:clamp(42px,6vw,78px);line-height:1.02;margin:0 0 18px;letter-spacing:-1.8px}.hero-tagline{font-weight:900;letter-spacing:.14em;color:#dbeafe}.hero-desc{font-size:18px;color:#dce7f2;max-width:720px}.hero-actions,.inline-actions{display:flex;flex-wrap:wrap;gap:12px;margin-top:28px}.hero-visual{position:relative}.hero-visual img{border-radius:34px;box-shadow:var(--shadow);height:560px;width:100%;object-fit:cover;border:1px solid rgba(255,255,255,.18)}.hero-card{position:absolute;left:-22px;bottom:28px;background:#fff;color:var(--navy);padding:20px;border-radius:18px;box-shadow:var(--shadow);max-width:330px}.hero-card strong,.hero-card span{display:block}.strengths{display:grid;grid-template-columns:repeat(4,1fr);gap:16px;margin-top:-54px;position:relative;z-index:3}.strengths article,.service-card,.product-card,.project-card,.post-card,.quote-form,.contact-info,.about-panel{background:#fff;border:1px solid var(--line);border-radius:var(--radius);box-shadow:var(--shadow)}.strengths article{padding:24px}.strengths span,.timeline span{color:var(--orange);font-weight:900}.strengths h3{margin:8px 0}.muted{background:var(--muted)}.section-head{max-width:760px;margin-bottom:34px}.section-head h2,.section-copy h2,.contact h2{font-size:clamp(30px,4vw,48px);line-height:1.12;margin:0 0 14px;color:var(--navy)}.split{display:grid;grid-template-columns:1fr .8fr;gap:42px;align-items:center}.about-panel{overflow:hidden}.about-panel img{width:100%;height:360px;object-fit:cover}.about-panel div{padding:24px}.about-panel b,.about-panel span{display:block}.service-grid,.product-grid,.project-grid,.post-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:22px}.service-card{padding:22px;display:flex;flex-direction:column;gap:14px}.service-card img{height:155px;object-fit:cover;border-radius:16px}.service-icon{font-size:30px}.card-actions{display:flex;gap:10px;margin-top:auto}.card-actions .btn{padding:10px 13px;font-size:13px}.filter-row{display:flex;flex-wrap:wrap;gap:10px;margin:0 0 24px}.filter-row button{border:1px solid var(--line);background:#fff;border-radius:999px;padding:10px 14px;font-weight:800;cursor:pointer}.filter-row button.active{background:var(--navy);color:#fff}.product-card,.project-card,.post-card{overflow:hidden;display:flex;flex-direction:column}.media{position:relative;background:#dbe3eb}.media img{width:100%;height:230px;object-fit:cover}.badge{position:absolute;top:12px;right:12px;background:rgba(7,26,47,.88);color:#fff;border-radius:999px;padding:7px 10px;font-size:13px;font-weight:900}.card-body{padding:20px;display:flex;flex-direction:column;gap:8px;flex:1}.category{color:var(--orange);font-size:13px;font-weight:900;text-transform:uppercase}.note{display:inline-flex;align-self:flex-start;background:#fff7ed;color:#9a3412;border:1px solid #fed7aa;border-radius:999px;padding:5px 9px;font-size:12px;font-weight:800}.timeline{display:grid;grid-template-columns:repeat(5,1fr);gap:16px}.timeline article{background:#fff;border-radius:18px;padding:22px;border-top:4px solid var(--orange);box-shadow:0 10px 30px rgba(7,26,47,.08)}.contact{background:linear-gradient(180deg,#fff,var(--muted))}.contact-grid{display:grid;grid-template-columns:.9fr 1.1fr;gap:26px}.contact-info,.quote-form{padding:28px}.contact-info ul{list-style:none;padding:0;margin:20px 0}.contact-info li{padding:11px 0;border-bottom:1px solid var(--line)}.notice,.form-note{background:#fff7ed;border-left:4px solid var(--orange);padding:12px;border-radius:10px}.quote-form{display:grid;gap:14px}.quote-form h3{font-size:28px;margin:0;color:var(--navy)}label{font-weight:800}input,select,textarea{width:100%;margin-top:7px;border:1px solid var(--line);border-radius:14px;padding:13px 14px;font:inherit;background:#fff}input:focus,select:focus,textarea:focus{outline:3px solid rgba(249,115,22,.25);border-color:var(--orange)}.floating-actions{position:fixed;right:18px;bottom:18px;z-index:45;display:flex;flex-direction:column;gap:8px}.floating-actions a{background:var(--orange);color:#fff;border-radius:999px;padding:11px 14px;font-weight:900;box-shadow:var(--shadow)}.site-footer{background:var(--navy);color:#dbeafe;padding:28px 0}.site-footer .container{display:flex;gap:18px;align-items:center;justify-content:space-between}.lightbox{position:fixed;inset:0;background:rgba(3,10,18,.88);z-index:100;display:none;padding:20px}.lightbox.open{display:grid;place-items:center}.lightbox-dialog{position:relative;width:min(1040px,100%);max-height:calc(100svh - 40px);display:grid;grid-template-columns:54px 1fr 54px;gap:10px;align-items:center}.lightbox img{grid-column:2;width:100%;max-height:70svh;object-fit:contain;border-radius:18px;background:#0b1624}.lightbox button{border:0;border-radius:999px;background:#fff;color:var(--navy);font-size:34px;cursor:pointer;width:48px;height:48px}.lightbox-close{position:absolute;right:8px;top:8px;z-index:2}.lightbox-prev{grid-column:1}.lightbox-next{grid-column:3}.lightbox p{grid-column:2;text-align:center;color:#fff;margin:0}.lightbox-thumbs{grid-column:1/-1;display:flex;gap:8px;overflow:auto;justify-content:center}.lightbox-thumbs button{width:82px;height:58px;border-radius:10px;overflow:hidden;padding:0;border:2px solid transparent}.lightbox-thumbs button.active{border-color:var(--orange)}.lightbox-thumbs img{width:100%;height:100%;object-fit:cover;border-radius:0}.reveal{animation:fadeUp .7s ease both}@keyframes fadeUp{from{opacity:0;transform:translateY(24px)}to{opacity:1;transform:none}}
@media (max-width:1050px){.primary-nav,.header-actions{display:none}.menu-toggle{display:block}.primary-nav{position:absolute;left:16px;right:16px;top:calc(var(--header) + 8px);background:#fff;border:1px solid var(--line);border-radius:20px;box-shadow:var(--shadow);padding:14px;flex-direction:column}.primary-nav.open{display:flex}.hero-grid,.split,.contact-grid{grid-template-columns:1fr}.strengths{grid-template-columns:repeat(2,1fr);margin-top:20px}.service-grid,.product-grid,.project-grid,.post-grid{grid-template-columns:repeat(2,1fr)}.timeline{grid-template-columns:repeat(2,1fr)}.hero{min-height:auto;padding-top:30px}.hero-visual img{height:430px}}
@media (max-width:640px){:root{--header:68px}.container{width:min(100% - 24px,1180px)}.brand small{display:none}.section{padding:64px 0}.hero h1{font-size:38px}.hero-actions .btn{width:100%}.strengths,.service-grid,.product-grid,.project-grid,.post-grid,.timeline{grid-template-columns:1fr}.hero-visual img{height:300px}.hero-card{position:static;margin-top:12px}.media img{height:210px}.floating-actions{left:10px;right:10px;bottom:10px;flex-direction:row}.floating-actions a{flex:1;text-align:center;padding:10px 8px;font-size:13px}.site-footer{padding-bottom:76px}.site-footer .container{flex-direction:column;align-items:flex-start}.lightbox{padding:10px}.lightbox-dialog{grid-template-columns:42px 1fr 42px}.lightbox button{width:40px;height:40px}.lightbox img{max-height:62svh}.lightbox-thumbs{justify-content:flex-start}.contact-info,.quote-form{padding:20px}}
.form-note.success{border-left-color:#15803d;color:#15803d;background:#f0fdf4}.form-note.error{border-left-color:#dc2626;color:#dc2626;background:#fef2f2}.quote-form button:disabled{opacity:.6;cursor:not-allowed}.quote-form{scroll-margin-top:90px}