:root{
  --red:#c81e1e;--red-d:#9b1313;--navy:#0f172a;--ink:#1e293b;--muted:#64748b;
  --bg:#fff;--alt:#f8fafc;--line:#e2e8f0;--amber:#f59e0b;--zalo:#0068ff;--r:14px;
}
*{box-sizing:border-box}
html{scroll-behavior:smooth;scroll-padding-top:70px}
body{margin:0;font:16px/1.6 system-ui,-apple-system,"Segoe UI",Roboto,sans-serif;color:var(--ink);background:var(--bg);padding-bottom:64px}
img{max-width:100%;height:auto}
a{color:var(--red)}
h1,h2,h3{line-height:1.25;color:var(--navy);margin:0 0 .5em}
h1{font-size:clamp(1.9rem,5vw,3rem)}
h2{font-size:clamp(1.5rem,3.5vw,2.1rem)}
h3{font-size:1.15rem}
.wrap{width:min(1120px,100% - 32px);margin-inline:auto}
.narrow{width:min(780px,100% - 32px)}

.topbar{background:var(--navy);color:#e2e8f0;font-size:.85rem}
.topbar .wrap{display:flex;justify-content:space-between;gap:12px;padding:6px 0;flex-wrap:wrap}
.topbar a{color:#fff;text-decoration:none}

.site-header{position:sticky;top:0;z-index:50;background:#fff;border-bottom:1px solid var(--line)}
.bar{display:flex;align-items:center;gap:16px;padding:10px 0}
.brand{display:flex;align-items:center;gap:10px;text-decoration:none;color:var(--navy);font-weight:800}
.brand-mark{background:var(--red);color:#fff;border-radius:10px;padding:6px 9px;font-size:.85rem;letter-spacing:.5px}
.brand-text{line-height:1.2;font-size:1rem}
.nav{display:none;margin-left:auto;gap:20px}
.nav a{color:var(--ink);text-decoration:none;font-weight:600}
.nav a:hover{color:var(--red)}
.bar .btn{margin-left:auto}

.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;border:0;border-radius:999px;padding:12px 22px;font:inherit;font-weight:700;text-decoration:none;cursor:pointer;transition:transform .15s,box-shadow .15s}
.btn:hover{transform:translateY(-1px)}
.btn-sm{padding:8px 16px;font-size:.95rem}
.btn-lg{padding:14px 26px;font-size:1.1rem}
.btn-xl{padding:16px 28px;font-size:1.15rem}
.btn-call{background:var(--red);color:#fff;box-shadow:0 6px 18px rgba(200,30,30,.35)}
.btn-call:hover{background:var(--red-d)}
.btn-zalo{background:var(--zalo);color:#fff}
.btn-light{background:#fff;color:var(--red)}
.pulse{animation:pulse 2s infinite}
@keyframes pulse{0%{box-shadow:0 0 0 0 rgba(200,30,30,.55)}70%{box-shadow:0 0 0 16px rgba(200,30,30,0)}100%{box-shadow:0 0 0 0 rgba(200,30,30,0)}}
@media (prefers-reduced-motion:reduce){.pulse{animation:none}html{scroll-behavior:auto}}

.hero{background:linear-gradient(135deg,rgba(15,23,42,.94),rgba(127,29,29,.9)),var(--hero-img,none) center/cover;color:#fff;padding:48px 0 56px}
.hero h1{color:#fff}
.hero-grid{display:grid;gap:32px}
.eyebrow{display:inline-block;background:rgba(255,255,255,.12);border-radius:999px;padding:4px 14px;font-weight:600;margin:0 0 14px}
.lead{font-size:1.1rem;color:#e2e8f0;max-width:56ch}
.cta{display:flex;flex-wrap:wrap;gap:12px;margin:22px 0 10px}
.hint{font-size:.9rem;color:#cbd5e1;margin:0}
.trust{list-style:none;margin:0;padding:0;display:grid;gap:12px;align-content:center}
.trust li{background:rgba(255,255,255,.08);border:1px solid rgba(255,255,255,.18);border-radius:var(--r);padding:14px 16px;display:flex;flex-direction:column}
.trust strong{color:var(--amber)}
.trust span{color:#e2e8f0;font-size:.95rem}

.sec{padding:52px 0}
.sec.alt{background:var(--alt)}
.sec-head{display:flex;justify-content:space-between;align-items:baseline;gap:12px;flex-wrap:wrap}
.cards{display:grid;gap:18px;grid-template-columns:repeat(auto-fill,minmax(260px,1fr))}
.card{background:#fff;border:1px solid var(--line);border-radius:var(--r);padding:20px;position:relative}
.card p{margin:0;color:var(--muted)}
.num{display:inline-grid;place-items:center;width:34px;height:34px;border-radius:50%;background:var(--red);color:#fff;font-weight:800;margin-bottom:10px}
.band{background:var(--red);color:#fff}
.band-in{display:flex;align-items:center;justify-content:space-between;gap:16px;padding:22px 0;flex-wrap:wrap}
.band-in p{margin:0;font-size:1.15rem}
.steps{list-style:none;padding:0;margin:0;display:grid;gap:18px;grid-template-columns:repeat(auto-fit,minmax(220px,1fr))}
.steps li{background:var(--alt);border-radius:var(--r);padding:20px}
.steps p{margin:0;color:var(--muted)}
.two{display:grid;gap:28px;align-items:start}
.chips{list-style:none;padding:0;margin:0;display:flex;flex-wrap:wrap;gap:10px}
.chips li{background:#fff;border:1px solid var(--line);border-radius:999px;padding:8px 16px;font-weight:600}
.faq{border:1px solid var(--line);border-radius:12px;padding:14px 18px;margin-bottom:10px;background:#fff}
.faq summary{cursor:pointer;font-weight:700}
.faq p{margin:.6em 0 0;color:var(--muted)}

.post{padding:0;overflow:hidden;display:flex;flex-direction:column}
.thumb img{width:100%;aspect-ratio:16/9;object-fit:cover;display:block}
.post-body{padding:16px 18px 20px}
.post-body h3 a{color:var(--navy);text-decoration:none}
.post-body h3 a:hover{color:var(--red)}
.meta{font-size:.85rem;color:var(--muted);margin:0 0 6px}
.page-title{margin-bottom:.2em}
.empty{padding:40px 0;color:var(--muted)}
.pager{display:flex;gap:8px;margin-top:28px;flex-wrap:wrap}
.pager a{padding:6px 14px;border:1px solid var(--line);border-radius:8px;text-decoration:none}
.pager .cur{background:var(--red);color:#fff;border-color:var(--red)}

.article h1{margin-bottom:.2em}
.article .cover{width:100%;border-radius:var(--r);margin:16px 0}
.content{font-size:1.05rem}
.content img{border-radius:12px;margin:12px 0}
.content h2{margin-top:1.6em}
.facts{display:grid;grid-template-columns:repeat(auto-fit,minmax(170px,1fr));gap:10px;background:var(--alt);border-radius:var(--r);padding:14px 16px;margin:16px 0}
.facts dt{font-size:.8rem;color:var(--muted)}
.facts dd{margin:0;font-weight:700}
.callout{display:flex;align-items:center;justify-content:space-between;gap:14px;flex-wrap:wrap;background:#fef2f2;border:1px solid #fecaca;border-radius:var(--r);padding:18px 20px;margin-top:32px}

.form{display:grid;gap:14px;margin-top:16px}
.form label{display:grid;gap:6px;font-weight:600}
.form input,.form textarea{font:inherit;padding:12px 14px;border:1px solid #cbd5e1;border-radius:10px;width:100%}
.form input:focus,.form textarea:focus{outline:2px solid var(--red);border-color:var(--red)}
.hp{position:absolute!important;left:-9999px;height:0;opacity:0}
.notice{padding:12px 16px;border-radius:10px;margin:12px 0}
.notice.ok{background:#ecfdf5;color:#065f46;border:1px solid #a7f3d0}
.notice.err{background:#fef2f2;color:#991b1b;border:1px solid #fecaca}

.site-footer{background:var(--navy);color:#cbd5e1;padding:36px 0 18px}
.site-footer h3{color:#fff}
.site-footer a{color:#fff}
.grid-3{display:grid;gap:24px}
.site-footer p{margin:.3em 0}
.copy{border-top:1px solid #334155;margin-top:24px;padding-top:14px;font-size:.85rem}

/* Thanh liên lạc cố định (điện thoại) */
.quickbar{position:fixed;inset:auto 0 0 0;z-index:60;display:grid;grid-template-columns:1.4fr 1fr 1fr;background:#fff;border-top:1px solid var(--line);box-shadow:0 -4px 16px rgba(0,0,0,.12)}
.quickbar a{display:flex;flex-direction:column;align-items:center;justify-content:center;gap:2px;padding:8px 4px;font-size:.8rem;font-weight:700;text-decoration:none;color:var(--ink);min-height:56px}
.quickbar a span{font-size:1.25rem;line-height:1}
.quickbar .q-call{background:var(--red);color:#fff;font-size:.95rem}
.quickbar .q-zalo{color:var(--zalo)}
.fab{display:none}

@media (min-width:860px){
  body{padding-bottom:0}
  .nav{display:flex}
  .bar .btn{margin-left:0}
  .hero{padding:72px 0 80px}
  .hero-grid{grid-template-columns:1.3fr 1fr;align-items:center}
  .two{grid-template-columns:1fr 1fr}
  .grid-3{grid-template-columns:repeat(3,1fr)}
  .quickbar{display:none}
  .fab{display:flex;flex-direction:column;align-items:flex-end;gap:10px;position:fixed;right:20px;bottom:20px;z-index:60}
  .fab a{text-decoration:none;border-radius:999px;font-weight:800;box-shadow:0 8px 24px rgba(0,0,0,.25)}
  .fab-zalo{background:var(--zalo);color:#fff;padding:10px 18px}
  .fab-call{background:var(--red);color:#fff;padding:14px 22px;display:flex;gap:8px;align-items:center;animation:pulse 2s infinite}
  .fab-call span{font-size:1rem}
}

.bar .btn-sm{white-space:nowrap}
.brand-text{font-size:.92rem}

.brand-logo{height:40px;width:auto;max-width:120px;object-fit:contain}
.svc{padding-top:0;overflow:hidden}
.svc-img{display:block;width:calc(100% + 40px);margin:0 -20px 14px;aspect-ratio:16/10;object-fit:cover}
.gallery{display:grid;gap:12px;grid-template-columns:repeat(auto-fill,minmax(220px,1fr))}
.gallery figure{margin:0;border-radius:var(--r);overflow:hidden;border:1px solid var(--line);background:#fff}
.gallery img{display:block;width:100%;aspect-ratio:4/3;object-fit:cover}
.gallery figcaption{padding:8px 12px;font-size:.9rem;color:var(--muted)}