:root{
  --ink:#0e2a2b;--ink-2:#34494a;--mute:#6b7f80;
  --brand:#0f4c4e;--brand-d:#0a3536;--brand-l:#e6f1f0;
  --accent:#e08a2c;--accent-d:#c3721a;
  --bg:#fbfaf7;--card:#fff;--line:#e3e8e6;
  --r:14px;--shadow:0 8px 30px rgba(14,42,43,.08);
}
*{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth}
body{font-family:"Be Vietnam Pro",system-ui,-apple-system,"Segoe UI",Roboto,sans-serif;color:var(--ink);background:var(--bg);line-height:1.65;font-size:16px}
img,svg{max-width:100%;display:block}
a{color:inherit;text-decoration:none}
.wrap{max-width:1180px;margin:0 auto;padding:0 20px}
h1,h2,h3{line-height:1.25;letter-spacing:-.01em}
h2{font-size:clamp(1.5rem,3vw,2.1rem);font-weight:700}
h3{font-size:1.1rem;font-weight:650}
.eyebrow{display:inline-block;font-size:.78rem;font-weight:600;letter-spacing:.12em;text-transform:uppercase;color:var(--accent-d);margin-bottom:10px}
.lead{color:var(--ink-2);max-width:62ch}
.btn{display:inline-flex;align-items:center;gap:8px;padding:12px 22px;border-radius:999px;font-weight:600;font-size:.95rem;border:2px solid transparent;cursor:pointer;transition:.2s}
.btn-primary{background:var(--accent);color:#fff}
.btn-primary:hover{background:var(--accent-d)}
.btn-ghost{border-color:rgba(255,255,255,.55);color:#fff}
.btn-ghost:hover{background:rgba(255,255,255,.12)}
.btn-line{border-color:var(--brand);color:var(--brand)}
.btn-line:hover{background:var(--brand);color:#fff}

/* topbar + header */
.topbar{background:var(--brand-d);color:#cfe3e1;font-size:.84rem}
.topbar .wrap{display:flex;justify-content:space-between;gap:16px;padding-top:8px;padding-bottom:8px;flex-wrap:wrap}
.topbar b{color:#fff}
header.site{position:sticky;top:0;z-index:50;background:rgba(251,250,247,.94);backdrop-filter:blur(8px);border-bottom:1px solid var(--line)}
header.site .wrap{display:flex;align-items:center;justify-content:space-between;height:72px;gap:20px}
.logo{display:flex;align-items:center;gap:12px;font-weight:700;font-size:1.05rem;line-height:1.15}
.logo small{display:block;font-weight:500;font-size:.72rem;color:var(--mute);letter-spacing:.04em}
.logo-mark{width:40px;height:40px;flex:none}
nav.main{display:flex;gap:4px}
nav.main a{padding:8px 14px;border-radius:8px;font-weight:500;font-size:.94rem;color:var(--ink-2)}
nav.main a:hover,nav.main a.on{background:var(--brand-l);color:var(--brand)}
.burger{display:none;background:none;border:0;padding:8px;cursor:pointer}
.burger span{display:block;width:24px;height:2px;background:var(--ink);margin:5px 0}

/* hero */
.hero{position:relative;background:var(--brand-d);color:#fff;overflow:hidden}
.hero::before{content:"";position:absolute;inset:0;background:
 radial-gradient(900px 400px at 85% 20%,rgba(224,138,44,.22),transparent 60%),
 repeating-linear-gradient(0deg,rgba(255,255,255,.04) 0 1px,transparent 1px 44px),
 repeating-linear-gradient(90deg,rgba(255,255,255,.04) 0 1px,transparent 1px 44px)}
.hero .wrap{position:relative;display:grid;grid-template-columns:1.15fr .85fr;gap:48px;align-items:center;padding-top:72px;padding-bottom:72px}
.hero h1{font-size:clamp(2rem,4.6vw,3.3rem);font-weight:800;margin:10px 0 18px}
.hero h1 em{font-style:normal;color:var(--accent)}
.hero p{color:#cfe3e1;font-size:1.08rem;max-width:54ch}
.hero .cta{display:flex;gap:12px;flex-wrap:wrap;margin-top:28px}
.badge{display:inline-block;background:rgba(224,138,44,.18);color:#ffc98a;border:1px solid rgba(224,138,44,.4);padding:5px 12px;border-radius:999px;font-size:.8rem;font-weight:600}
.gauge{background:rgba(255,255,255,.06);border:1px solid rgba(255,255,255,.14);border-radius:20px;padding:24px}
.gauge h3{color:#fff;font-size:.95rem;margin-bottom:6px}
.gauge .sub{color:#9fc2bf;font-size:.82rem;margin-bottom:10px}
.gauge svg{width:100%;height:auto}

/* strip */
.strip{background:#fff;border-bottom:1px solid var(--line)}
.strip .wrap{display:grid;grid-template-columns:repeat(4,1fr)}
.strip .it{padding:26px 20px;display:flex;gap:14px;border-right:1px solid var(--line)}
.strip .it:last-child{border:0}
.strip svg{width:34px;height:34px;flex:none;color:var(--brand)}
.strip b{display:block;font-size:.98rem}
.strip span{color:var(--mute);font-size:.86rem}

/* sections */
section.s{padding:76px 0}
section.alt{background:#fff;border-block:1px solid var(--line)}
.head{margin-bottom:38px}
.head.center{text-align:center}.head.center .lead{margin-inline:auto}
.grid{display:grid;gap:22px}
.g3{grid-template-columns:repeat(3,1fr)}
.g2{grid-template-columns:repeat(2,1fr)}
.g4{grid-template-columns:repeat(4,1fr)}
.card{background:var(--card);border:1px solid var(--line);border-radius:var(--r);padding:26px;transition:.25s}
.card:hover{box-shadow:var(--shadow);transform:translateY(-3px);border-color:#cfdad8}
.card .ic{width:48px;height:48px;border-radius:12px;background:var(--brand-l);color:var(--brand);display:grid;place-items:center;margin-bottom:16px}
.card .ic svg{width:26px;height:26px}
.card p{color:var(--ink-2);font-size:.95rem;margin-top:8px}
.card .std{display:inline-block;margin-top:12px;font-size:.78rem;font-weight:600;color:var(--accent-d);background:#fdf1e1;padding:3px 10px;border-radius:6px}
.card ul{margin:10px 0 0 18px;color:var(--ink-2);font-size:.93rem}

.split{display:grid;grid-template-columns:1fr 1fr;gap:56px;align-items:center}
.about-art{background:var(--brand-l);border-radius:24px;padding:30px;aspect-ratio:1/.9;display:grid;place-items:center}
.checks{list-style:none;margin-top:18px}
.checks li{padding-left:30px;position:relative;margin:10px 0;color:var(--ink-2)}
.checks li::before{content:"";position:absolute;left:0;top:5px;width:18px;height:18px;border-radius:50%;background:var(--accent) url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='white' stroke-width='3.5' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpath d='M5 12l5 5 9-10'/%3E%3C/svg%3E") center/12px no-repeat}

.stats{background:var(--brand);color:#fff}
.stats .wrap{display:grid;grid-template-columns:repeat(4,1fr);gap:20px;padding-top:44px;padding-bottom:44px;text-align:center}
.stats b{display:block;font-size:2.3rem;font-weight:800;color:var(--accent)}
.stats span{color:#cfe3e1;font-size:.92rem}

.steps{counter-reset:s}
.step{position:relative;padding:24px 24px 24px 76px;background:#fff;border:1px solid var(--line);border-radius:var(--r)}
.step::before{counter-increment:s;content:counter(s);position:absolute;left:22px;top:22px;width:38px;height:38px;border-radius:50%;background:var(--brand);color:#fff;display:grid;place-items:center;font-weight:700}
.step p{color:var(--ink-2);font-size:.93rem;margin-top:4px}

table.t{width:100%;border-collapse:collapse;background:#fff;border:1px solid var(--line);border-radius:var(--r);overflow:hidden;font-size:.93rem}
table.t th{background:var(--brand);color:#fff;text-align:left;padding:12px 16px;font-weight:600}
table.t td{padding:12px 16px;border-top:1px solid var(--line);color:var(--ink-2)}
table.t tr:nth-child(even) td{background:#f7faf9}
.tw{overflow-x:auto}

.cta-band{background:linear-gradient(120deg,var(--brand-d),var(--brand));color:#fff;border-radius:24px;padding:44px;display:flex;justify-content:space-between;align-items:center;gap:24px;flex-wrap:wrap}
.cta-band p{color:#cfe3e1;margin-top:6px}

.page-head{background:var(--brand-d);color:#fff;padding:56px 0}
.page-head p{color:#cfe3e1;margin-top:10px;max-width:60ch}
.crumb{font-size:.84rem;color:#9fc2bf;margin-bottom:10px}
.crumb a:hover{color:#fff}

form.f{display:grid;gap:14px}
form.f label{font-weight:600;font-size:.9rem}
form.f input,form.f textarea,form.f select{width:100%;padding:12px 14px;border:1px solid #cdd7d5;border-radius:10px;font:inherit;background:#fff;margin-top:5px}
form.f input:focus,form.f textarea:focus,form.f select:focus{outline:2px solid var(--brand);border-color:transparent}
.note{font-size:.84rem;color:var(--mute)}
.contact-list{list-style:none}
.contact-list li{display:flex;gap:14px;margin-bottom:18px}
.contact-list svg{width:22px;height:22px;color:var(--brand);flex:none;margin-top:3px}

/* footer */
footer.site{background:#0a2223;color:#a9c3c1;padding:56px 0 24px;font-size:.92rem}
footer.site .cols{display:grid;grid-template-columns:1.4fr 1fr 1fr 1.2fr;gap:36px}
footer.site h4{color:#fff;margin-bottom:14px;font-size:.98rem}
footer.site a:hover{color:#fff}
footer.site li{list-style:none;margin:7px 0}
footer.site .copy{border-top:1px solid rgba(255,255,255,.1);margin-top:36px;padding-top:20px;font-size:.84rem;display:flex;justify-content:space-between;gap:12px;flex-wrap:wrap}

/* floating */
.float{position:fixed;left:16px;bottom:16px;z-index:60;display:grid;gap:10px}
.float a{display:flex;align-items:center;gap:8px;padding:11px 18px;border-radius:999px;color:#fff;font-weight:600;font-size:.9rem;box-shadow:0 6px 20px rgba(0,0,0,.2)}
.float .zl{background:#0068ff}.float .ph{background:#c8321f}
.float svg{width:18px;height:18px}

@media(max-width:960px){
  .hero .wrap,.split{grid-template-columns:1fr}
  .g3,.g4{grid-template-columns:1fr 1fr}
  .strip .wrap,.stats .wrap{grid-template-columns:1fr 1fr}
  .strip .it:nth-child(2){border-right:0}
  footer.site .cols{grid-template-columns:1fr 1fr}
}
@media(max-width:720px){
  .burger{display:block}
  nav.main{display:none;position:absolute;top:72px;left:0;right:0;background:#fff;border-bottom:1px solid var(--line);flex-direction:column;padding:10px 20px 16px}
  nav.main.open{display:flex}
  .g2,.g3,.g4{grid-template-columns:1fr}
  .topbar .hide-m{display:none}
  section.s{padding:52px 0}
  .cta-band{padding:30px 24px}
  footer.site .cols{grid-template-columns:1fr}
  .float a span{display:none}.float a{padding:12px}
}

/* logo viết tắt */
.logo{gap:10px}
.sbvl{font-weight:800;font-size:1.6rem;letter-spacing:.06em;line-height:1;position:relative;padding-bottom:5px}
.sbvl::after{content:"";position:absolute;left:0;bottom:0;width:100%;height:3px;border-radius:2px;background:var(--accent)}