:root{--sky:#0ea5e9;--sky-2:#38bdf8;--sky-3:#e0f2fe;--blue:#0369a1;--navy:#0f2544;--text:#172033;--muted:#667085;--line:#dbeafe;--bg:#f6fbff;--green:#10b981;--amber:#f59e0b;--shadow:0 20px 55px rgba(14,165,233,.16)}
*{box-sizing:border-box;margin:0;padding:0}html{scroll-behavior:smooth}body{font-family:"Be Vietnam Pro",Arial,Helvetica,sans-serif;background:var(--bg);color:var(--text);line-height:1.55;text-rendering:optimizeLegibility;-webkit-font-smoothing:antialiased}a{text-decoration:none;color:inherit}img{display:block;max-width:100%}.container{width:min(1220px,92%);margin:auto}
.topbar{background:linear-gradient(90deg,var(--blue),var(--sky));color:white;font-size:14px}.topbar .container{display:flex;justify-content:space-between;gap:18px;padding:9px 0}.topbar b{font-weight:900}.header{position:sticky;top:0;z-index:30;background:rgba(255,255,255,.92);backdrop-filter:blur(18px);border-bottom:1px solid var(--line)}.header-main{display:grid;grid-template-columns:auto auto 1fr auto;align-items:center;gap:16px;padding:16px 0}.logo{display:flex;align-items:center;gap:12px;font-weight:950}.logo-mark{width:46px;height:46px;border-radius:14px;display:grid;place-items:center;color:white;background:linear-gradient(135deg,var(--sky),var(--blue));box-shadow:0 12px 28px rgba(14,165,233,.28)}.logo-name{font-size:24px;letter-spacing:0;color:var(--navy)}.logo-name span{color:var(--sky)}.logo small{display:block;color:var(--muted);font-size:12px;font-weight:800}.menu-toggle{display:none;width:44px;height:44px;border:1px solid var(--line);border-radius:14px;background:white;padding:10px}.menu-toggle span{display:block;height:2px;margin:5px 0;background:var(--blue)}.nav{display:flex;justify-content:flex-end;gap:8px;overflow:auto}.nav li{list-style:none}.nav a{white-space:nowrap;padding:10px 13px;border-radius:999px;color:#385776;font-weight:900;font-size:14px}.nav a:hover{background:var(--sky-3);color:var(--blue)}.contact-btn{display:inline-flex;align-items:center;justify-content:center;min-height:44px;padding:0 16px;border-radius:14px;background:var(--sky);color:white;font-weight:950}
.hero{position:relative;overflow:hidden;background:linear-gradient(135deg,#fff 0%,#eef9ff 55%,#dff4ff 100%)}.hero:before{content:"";position:absolute;right:-140px;top:60px;width:420px;height:420px;border-radius:50%;background:rgba(56,189,248,.22)}.hero-grid{position:relative;z-index:1;display:grid;grid-template-columns:minmax(0,1fr) minmax(420px,.92fr);gap:52px;align-items:center;min-height:660px;padding:62px 0 74px}.eyebrow{display:inline-flex;align-items:center;gap:8px;margin-bottom:14px;color:var(--blue);background:white;border:1px solid var(--line);border-radius:999px;padding:8px 13px;font-size:13px;font-weight:950}.eyebrow:before{content:"";width:8px;height:8px;border-radius:50%;background:var(--sky)}h1{max-width:770px;color:var(--navy);font-size:clamp(42px,6vw,76px);line-height:1.03;letter-spacing:-1.6px;margin-bottom:18px}.hero-copy p{max-width:650px;color:#496178;font-size:19px;margin-bottom:28px}.cta{display:flex;flex-wrap:wrap;gap:12px}.btn{display:inline-flex;align-items:center;justify-content:center;min-height:50px;padding:0 20px;border-radius:14px;font-weight:950;border:1px solid transparent}.btn.primary{background:linear-gradient(135deg,var(--sky),var(--blue));color:white;box-shadow:0 14px 30px rgba(14,165,233,.28)}.btn.light{background:white;color:var(--blue);border-color:var(--line)}
.trust{display:grid;grid-template-columns:repeat(3,1fr);gap:12px;margin-top:34px;max-width:700px}.trust div{padding:16px;background:white;border:1px solid var(--line);border-radius:16px;box-shadow:0 10px 28px rgba(14,165,233,.08)}.trust b{display:block;color:var(--navy);font-size:18px}.trust span{color:var(--muted);font-size:13px}.hero-visual{position:relative}.hero-visual .main-img{width:100%;height:510px;object-fit:cover;border-radius:28px;box-shadow:var(--shadow);border:8px solid white}.float{position:absolute;background:rgba(255,255,255,.95);border:1px solid var(--line);border-radius:18px;box-shadow:var(--shadow);padding:16px}.float strong,.float span{display:block}.float strong{color:var(--navy);font-size:18px}.float span{color:var(--muted);font-size:13px}.float.price{left:-26px;bottom:38px}.float.price b{display:block;color:var(--sky);font-size:28px;margin-top:4px}.float.server{right:-18px;top:34px}
.quick-cats{margin-top:-42px;position:relative;z-index:2}.cat-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:14px}.cat{display:grid;grid-template-columns:58px 1fr;align-items:center;gap:14px;min-height:112px;padding:18px;background:white;border:1px solid var(--line);border-radius:22px;box-shadow:0 16px 38px rgba(14,165,233,.12);transition:.22s}.cat:hover{transform:translateY(-5px);border-color:var(--sky-2)}.cat-icon{display:grid;place-items:center;width:58px;height:58px;border-radius:18px;background:var(--sky-3);font-size:28px}.cat b{display:block;color:var(--navy);font-size:17px}.cat small{color:var(--muted)}
.section{padding:72px 0}.section-head{display:flex;align-items:end;justify-content:space-between;gap:22px;margin-bottom:24px}.section-head h2{color:var(--navy);font-size:clamp(30px,4vw,46px);line-height:1.08;letter-spacing:-.8px}.section-head p{color:var(--muted);margin-top:8px}.link{color:var(--blue);font-weight:950}.products{display:grid;grid-template-columns:repeat(4,1fr);gap:18px}.product{background:white;border:1px solid var(--line);border-radius:24px;overflow:hidden;box-shadow:0 14px 36px rgba(14,165,233,.09);transition:.22s}.product:hover{transform:translateY(-6px);box-shadow:var(--shadow)}.product-media{position:relative;background:#eaf8ff}.product-media img{width:100%;aspect-ratio:1/.72;object-fit:cover}.label{position:absolute;top:12px;left:12px;padding:7px 10px;border-radius:999px;background:var(--sky);color:white;font-size:12px;font-weight:950}.label.green{background:var(--green)}.label.amber{background:var(--amber)}.product-body{display:grid;gap:12px;padding:18px}.product h3{color:var(--navy);font-size:19px;line-height:1.3;min-height:50px}.spec{color:var(--muted);font-size:13px;min-height:62px}.price-row{display:flex;align-items:end;justify-content:space-between;gap:10px;padding-top:12px;border-top:1px solid #edf7ff}.price{color:var(--blue);font-size:21px;font-weight:950}.stock{color:var(--green);font-size:13px;font-weight:950}.quote{display:flex;justify-content:center;align-items:center;min-height:44px;border-radius:14px;background:var(--sky-3);color:var(--blue);font-weight:950}.quote:hover{background:var(--sky);color:white}
.banner{background:linear-gradient(135deg,var(--blue),var(--sky));color:white;border-radius:30px;overflow:hidden;display:grid;grid-template-columns:1fr .9fr;align-items:center;box-shadow:var(--shadow)}.banner-copy{padding:44px}.banner-copy h2{font-size:clamp(30px,4vw,48px);line-height:1.08;margin-bottom:12px}.banner-copy p{color:#e8f8ff;font-size:17px;margin-bottom:22px}.banner-img{height:100%;min-height:380px}.banner-img img{width:100%;height:100%;object-fit:cover}.banner .btn{background:white;color:var(--blue)}
.service-wrap{display:grid;grid-template-columns:.86fr 1fr;gap:24px;align-items:start}.service-card,.service{background:white;border:1px solid var(--line);border-radius:24px;box-shadow:0 14px 36px rgba(14,165,233,.09)}.service-card{padding:28px}.service-card h3{color:var(--navy);font-size:26px;margin-bottom:10px}.service-card p,.service span{color:var(--muted)}.service-list{display:grid;grid-template-columns:repeat(2,1fr);gap:14px}.service{padding:22px}.service b{display:block;color:var(--navy);font-size:18px;margin-bottom:6px}.contact{background:white;border-top:1px solid var(--line)}.contact-grid{display:grid;grid-template-columns:1fr auto;gap:46px;align-items:center}.contact h2{color:var(--navy);font-size:clamp(30px,4vw,46px);line-height:1.08;margin-bottom:12px}.contact p{color:var(--muted);font-size:17px}.contact-lines{display:flex;flex-wrap:wrap;gap:12px;margin-top:24px}.contact-lines a{padding:12px 14px;background:var(--sky-3);color:var(--blue);border-radius:14px;font-weight:950}.contact-card{min-width:320px;padding:28px;background:#f6fbff;border:1px solid var(--line);border-radius:24px;box-shadow:var(--shadow);text-align:center}.contact-card strong{display:block;color:var(--navy);font-size:22px;margin-bottom:8px}.contact-card span{display:block;color:var(--muted);margin-bottom:18px}
footer{background:#0f2544;color:#d8efff;padding:40px 0}footer .container{display:flex;justify-content:space-between;gap:18px}footer a{color:white;font-weight:900}.floating-contact{position:fixed;right:18px;bottom:18px;z-index:40;display:grid;gap:10px}.floating-contact a{display:flex;align-items:center;justify-content:center;min-height:44px;padding:0 16px;border-radius:999px;color:white;font-weight:950;box-shadow:0 12px 28px rgba(15,37,68,.22)}.floating-phone{background:var(--sky)}.floating-zalo{background:#0f2544}
@media(max-width:1060px){.header-main{grid-template-columns:auto 44px auto}.menu-toggle{display:block}.nav{grid-column:1/-1;display:none;justify-content:flex-start;flex-wrap:wrap}.nav.is-open{display:flex}.hero-grid,.banner,.service-wrap,.contact-grid{grid-template-columns:1fr}.hero-grid{min-height:auto}.products,.cat-grid{grid-template-columns:repeat(2,1fr)}.banner-img{min-height:300px}}@media(max-width:680px){.topbar .container{display:block;text-align:center}footer.st-footer .container{display:block;text-align:left}.hero-grid{padding:42px 0 62px}h1{font-size:38px}.trust,.products,.cat-grid,.service-list{grid-template-columns:1fr}.hero-visual .main-img{height:auto;aspect-ratio:4/3}.float{position:static;margin-top:10px}.quick-cats{margin-top:0;padding-top:20px}.section-head{display:block}.banner-copy{padding:28px}.contact-card{min-width:0}.floating-contact{left:14px;right:14px;grid-template-columns:1fr 1fr}.floating-contact a{border-radius:14px}}