:root{--blue:#17408f;--blue-d:#0f2f6e;--gold:#f2b01e;--ink:#1c2b4a;--muted:#5b6784;--bg:#f4f8fd}
*{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth}
body{font-family:'Be Vietnam Pro',system-ui,sans-serif;color:var(--ink);background:#fff;line-height:1.5;overflow-x:hidden}
a{color:inherit;text-decoration:none}
ul{list-style:none}
img{max-width:100%;display:block}
svg{width:1em;height:1em;flex:none}
.container{width:min(1280px,100% - 48px);margin-inline:auto}

/* topbar */
.topbar{background:var(--blue);color:#fff;font-size:14px}
.topbar__in{display:flex;justify-content:space-between;align-items:center;height:46px;gap:16px}
.topbar__info{display:flex;gap:40px;align-items:center}
.topbar__info li{display:flex;align-items:center;gap:8px;white-space:nowrap}
.topbar__info a{display:flex;align-items:center;gap:8px}
.topbar__info a:hover{color:var(--gold)}
.topbar svg{font-size:18px}
.topbar__social{display:flex;align-items:center;gap:14px}
.topbar__social svg{font-size:22px}
.topbar__social button{background:none;border:0;color:#fff;cursor:pointer;display:flex}
.zalo{background:#fff;color:var(--blue);font-size:9px;font-weight:800;border-radius:50%;width:22px;height:22px;display:grid;place-items:center}
.sep{width:1px;height:20px;background:rgba(255,255,255,.3)}

/* header */
.header{background:#fff;position:sticky;top:0;z-index:50;box-shadow:0 2px 12px rgba(23,64,143,.08);border-radius:0 0 50% 50%/0 0 14px 14px}
.header__in{display:flex;align-items:center;justify-content:space-between;height:90px;gap:20px}
.logo{color:var(--blue);display:block}
.logo img{width:160px;height:auto;mix-blend-mode:multiply}
.nav{display:flex;align-items:center;gap:6px;font-weight:500;font-size:16px;white-space:nowrap}
.nav>a:not(.btn){padding:10px 22px;border-radius:12px;position:relative;transition:.2s}
.nav>a:not(.btn):hover{color:var(--blue)}
.nav>a.active{background:var(--blue);color:#fff}
.nav>a.active::after{content:"";position:absolute;left:50%;bottom:-8px;width:28px;height:3px;background:var(--blue);border-radius:3px;transform:translateX(-50%)}
.nav .nav__cta{display:none}
.burger{display:none;background:none;border:0;width:44px;height:44px;cursor:pointer;flex-direction:column;justify-content:center;gap:6px;align-items:center}
.burger span{width:26px;height:3px;background:var(--blue);border-radius:3px;transition:.25s}
.burger[aria-expanded=true] span:nth-child(1){transform:translateY(9px) rotate(45deg)}
.burger[aria-expanded=true] span:nth-child(2){opacity:0}
.burger[aria-expanded=true] span:nth-child(3){transform:translateY(-9px) rotate(-45deg)}

/* buttons */
.btn{white-space:nowrap;display:inline-flex;align-items:center;gap:10px;font-weight:600;font-size:15px;padding:14px 26px;border-radius:40px;transition:.2s;border:2px solid transparent;cursor:pointer}
.btn svg{font-size:18px}
.btn--gold{background:linear-gradient(#f7bf3a,#eba212);color:#1c2b4a;box-shadow:0 6px 16px rgba(242,176,30,.35)}
.btn--gold:hover{transform:translateY(-2px);box-shadow:0 10px 22px rgba(242,176,30,.45)}
.btn--blue{background:var(--blue);color:#fff;padding:14px 14px 14px 28px;font-size:17px}
.btn--blue:hover{background:var(--blue-d);transform:translateY(-2px)}
.circle{width:28px;height:28px;border-radius:50%;background:#fff;color:var(--blue);display:grid;place-items:center}
.btn--outline{border-color:var(--blue);color:var(--blue);padding:9px 20px;font-size:14px;background:#fff}
.btn--outline:hover{background:var(--blue);color:#fff}

/* hero */
.hero{position:relative;min-height:470px;background:linear-gradient(180deg,#cfe3f7 0%,#eaf3fb 70%,#fff 100%);overflow:hidden}
.hero__bg{position:absolute;right:0;top:0;bottom:0;width:58%;background-size:cover;background-position:center;-webkit-mask-image:linear-gradient(90deg,transparent,#000 22%);mask-image:linear-gradient(90deg,transparent,#000 22%)}
.hero__in{position:relative;padding:56px 0 120px}
.hero__company{color:var(--blue);font-weight:600;font-size:19px;letter-spacing:.2px;display:inline-block;position:relative;padding-bottom:4px}
.hero__company::after{content:"";position:absolute;left:105%;top:62%;width:130px;height:2px;background:var(--gold)}
.hero h1{margin-top:22px;font-size:clamp(40px,5.4vw,68px);line-height:1.1;font-weight:800;color:var(--blue);letter-spacing:-.5px}
.hero h1 span{display:block;color:#e3a21c;font-size:.72em;font-weight:700;letter-spacing:0;margin-top:2px}
.hero__tag{margin:18px 0 28px;font-style:italic;font-size:22px;color:var(--blue);font-weight:500}
.hero__tag span{margin:0 10px}
.hero__dots{position:absolute;left:50%;bottom:50px;display:flex;gap:8px;transform:translateX(-50%)}
.hero__dots button{width:14px;height:8px;border-radius:8px;border:0;background:#c6d4e8;cursor:pointer;transition:.25s}
.hero__dots button.on{width:18px;background:var(--blue)}

/* features */
.features{position:relative;margin-top:-62px;background:#fff;border-radius:18px;box-shadow:0 10px 36px rgba(23,64,143,.12);display:grid;grid-template-columns:repeat(4,1fr);padding:22px 0;z-index:5}
.features li{display:flex;align-items:center;gap:16px;padding:6px 32px;border-left:1px solid #dbe3ef}
.features li:first-child{border:0}
.features>li>svg{width:50px;height:50px;color:var(--blue)}
.features b{display:block;color:var(--blue);font-weight:600;font-size:17px}
.features span{font-size:14px;color:var(--muted)}

/* projects */
.projects{display:grid;grid-template-columns:360px 1fr;gap:30px;align-items:center;padding:40px 0 70px}
.projects__intro{position:relative;padding-top:20px}
.projects__intro::before{content:"";position:absolute;top:0;left:0;width:80px;height:3px;background:var(--gold)}
.projects h2{color:var(--blue);font-size:32px;font-weight:800;margin-bottom:12px}
.projects__intro p{color:var(--muted);font-size:15px;margin-bottom:18px;max-width:340px}
.projects__grid{display:grid;grid-template-columns:repeat(4,1fr);gap:14px}
.card{position:relative;border-radius:10px;overflow:hidden;aspect-ratio:262/174;background:#dfe9f6;box-shadow:0 6px 18px rgba(23,64,143,.15)}
.card img{width:100%;height:100%;object-fit:cover;transition:transform .5s}
.card:hover img{transform:scale(1.07)}
.card span{position:absolute;left:0;right:0;bottom:0;background:rgba(15,47,110,.88);color:#fff;font-size:13px;font-weight:500;padding:11px 14px;display:flex;align-items:center;gap:8px}

/* footer */
.footer{background:var(--blue);color:#fff;position:relative;padding:34px 0;border-radius:50% 50% 0 0/14px 14px 0 0;box-shadow:inset 0 5px 0 var(--gold)}
.footer__in{display:flex;align-items:center;justify-content:space-between;gap:24px}
.logo--w img{background:#fff;border-radius:10px;padding:4px 8px;mix-blend-mode:normal;width:140px}
.footer__slogan{font-style:italic;font-size:22px;text-align:center;flex:1}
.totop{position:fixed;right:30px;bottom:30px;width:50px;height:50px;border-radius:50%;border:2px solid #fff;background:var(--blue);color:#fff;font-size:22px;display:grid;place-items:center;cursor:pointer;opacity:0;pointer-events:none;transition:.3s;z-index:60}
.totop.show{opacity:1;pointer-events:auto}
.page-wrap{padding:50px 0;min-height:50vh}
.page-wrap h1{color:var(--blue);margin-bottom:20px}

/* responsive */
@media (max-width:1200px){
  .topbar__info li:nth-child(2){display:none}
  .header__cta{display:none}
  .nav>a:not(.btn){padding:10px 14px}
  .features li{padding:6px 18px}
  .projects{grid-template-columns:1fr}
  .projects__intro p{max-width:none}
}
@media (max-width:960px){
  .topbar{display:none}
  .burger{display:flex}
  .nav{position:absolute;top:100%;left:0;right:0;background:#fff;flex-direction:column;align-items:stretch;padding:12px 24px 24px;gap:2px;box-shadow:0 14px 24px rgba(23,64,143,.12);display:none}
  .nav.open{display:flex}
  .nav>a.active::after{display:none}
  .nav .nav__cta{display:inline-flex;justify-content:center;margin-top:10px}
  .header{border-radius:0}
  .hero__bg{width:100%;opacity:.35;-webkit-mask-image:none;mask-image:none}
  .hero__company::after{display:none}
  .hero__in{padding:40px 0 110px}
  .features{grid-template-columns:1fr 1fr;gap:6px 0}
  .features li:nth-child(3){border-left:0}
  .projects__grid{grid-template-columns:1fr 1fr}
  .footer__in{flex-direction:column;text-align:center}
}
@media (max-width:560px){
  .hero__tag{font-size:17px}
  .features{grid-template-columns:1fr}
  .features li{border:0;border-top:1px solid #e3e9f3}
  .features li:first-child{border:0}
  .footer__slogan{font-size:18px}
}

/* ===== Trang con & khối bổ sung ===== */
.narrow{max-width:900px}
.section{padding:70px 0}
.section--tint{background:var(--bg)}
.eyebrow{display:inline-block;color:#c98a00;font-weight:700;font-size:13px;letter-spacing:1.5px;margin-bottom:8px}
.sec-head{text-align:center;margin-bottom:36px}
.sec-head h2,.about-tease__txt h2,.steps h2,.contact h2{color:var(--blue);font-size:clamp(26px,3vw,36px);font-weight:800;line-height:1.2}
.lead{font-size:17px;color:var(--muted);margin:0 0 28px}

.banner{background-size:cover;background-position:center;color:#fff;padding:70px 0 64px}
.banner h1{color:#fff;font-size:clamp(32px,4.5vw,52px);font-weight:800;margin-top:6px}
.banner__sub{margin-top:8px;font-size:18px;opacity:.9}
.crumb{font-size:14px;opacity:.85}.crumb a:hover{color:var(--gold)}

.about-tease{display:grid;grid-template-columns:1fr 1fr;gap:56px;align-items:center}
.about-tease__img{position:relative;padding-bottom:60px}
.about-tease__img img{border-radius:16px;width:88%;aspect-ratio:4/3;object-fit:cover;box-shadow:0 14px 36px rgba(23,64,143,.18)}
.about-tease__img .small{position:absolute;right:0;bottom:0;width:48%;aspect-ratio:1;border:6px solid #fff}
.about-tease__txt p{color:var(--muted);margin:14px 0}
.ticks{margin:16px 0 26px}
.ticks li{padding-left:30px;position:relative;margin:8px 0;font-weight:500}
.ticks li::before{content:"✓";position:absolute;left:0;top:0;width:20px;height:20px;border-radius:50%;background:var(--gold);color:#fff;font-size:12px;display:grid;place-items:center;top:3px}

.svc-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:22px}
.svc-grid--3{grid-template-columns:repeat(3,1fr)}
.svc{background:#fff;border-radius:14px;overflow:hidden;box-shadow:0 8px 24px rgba(23,64,143,.1);transition:.3s;display:block}
.svc:hover{transform:translateY(-6px)}
.svc img{width:100%;aspect-ratio:4/3;object-fit:cover}
.svc div{padding:18px 20px 22px}
.svc h3{color:var(--blue);font-size:18px;margin-bottom:6px}
.svc p{color:var(--muted);font-size:14.5px}

.news-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:26px}
.news{background:#fff;border-radius:14px;overflow:hidden;box-shadow:0 8px 24px rgba(23,64,143,.1);transition:.3s;display:block}
.news:hover{transform:translateY(-6px)}
.news img{width:100%;aspect-ratio:16/10;object-fit:cover}
.news div{padding:18px 20px 24px}
.news time,.meta{font-size:13px;color:#c98a00;font-weight:600}
.news h3{color:var(--blue);font-size:18px;margin:6px 0 8px;line-height:1.35}
.news p{color:var(--muted);font-size:14.5px}

.cta{background-size:cover;background-position:center;color:#fff}
.cta__in{display:flex;justify-content:space-between;align-items:center;gap:24px;padding:56px 0}
.cta h2{font-size:clamp(22px,3vw,32px);font-weight:700}

.values{display:grid;grid-template-columns:repeat(4,1fr);gap:22px}
.values>div{background:#fff;border-radius:14px;padding:28px 24px;box-shadow:0 8px 24px rgba(23,64,143,.08);text-align:center}
.values svg{width:48px;height:48px;color:var(--blue);margin-bottom:12px}
.values h3{color:var(--blue);margin-bottom:8px;font-size:18px}
.values p{color:var(--muted);font-size:14.5px}

.steps{margin-top:64px;text-align:center}
.steps ol{list-style:none;counter-reset:s;display:grid;grid-template-columns:repeat(4,1fr);gap:20px;margin-top:28px;text-align:left}
.steps li{counter-increment:s;background:var(--bg);border-radius:14px;padding:22px;position:relative}
.steps li::before{content:counter(s);display:grid;place-items:center;width:36px;height:36px;border-radius:50%;background:var(--blue);color:#fff;font-weight:700;margin-bottom:10px}
.steps b{display:block;color:var(--blue);margin-bottom:4px}
.steps span{color:var(--muted);font-size:14.5px}

.proj-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:22px}
.pcard{position:relative;border-radius:14px;overflow:hidden;aspect-ratio:4/5;display:block;background:#dfe9f6;box-shadow:0 8px 24px rgba(23,64,143,.14)}
.pcard img{width:100%;height:100%;object-fit:cover;transition:transform .6s}
.pcard:hover img{transform:scale(1.07)}
.pcard div{position:absolute;inset:auto 0 0 0;padding:40px 18px 18px;color:#fff;background:linear-gradient(transparent,rgba(15,47,110,.92))}
.pcard h3{font-size:17px}.pcard p{font-size:13.5px;opacity:.9}

.single__img{width:100%;border-radius:14px;margin:18px 0 26px}
.entry{font-size:17px;line-height:1.75;color:#2b3856}
.entry p{margin-bottom:16px}

.jobs{display:grid;gap:14px;margin-bottom:30px}
.job{display:flex;justify-content:space-between;align-items:center;gap:20px;background:#fff;border:1px solid #e0e8f3;border-radius:14px;padding:20px 24px;box-shadow:0 4px 14px rgba(23,64,143,.06)}
.job h3{color:var(--blue)}.job p{color:var(--muted);font-size:14.5px}

.contact{display:grid;grid-template-columns:1fr 1fr;gap:48px}
.contact__info ul{margin:20px 0}
.contact__info li{display:flex;gap:12px;align-items:flex-start;margin:12px 0}
.contact__info li svg{font-size:22px;color:var(--blue);margin-top:3px}
.contact__info iframe{width:100%;height:280px;border:0;border-radius:14px}
.contact__form{background:var(--bg);border-radius:16px;padding:32px;display:grid;gap:16px;align-content:start}
.contact__form label{display:grid;gap:6px;font-weight:500;font-size:14.5px;color:var(--ink)}
.contact__form input,.contact__form textarea{font:inherit;padding:12px 14px;border:1px solid #cfd9e8;border-radius:10px;background:#fff}
.contact__form input:focus,.contact__form textarea:focus{outline:2px solid var(--blue);border-color:transparent}
.contact__form .btn{justify-self:start}
.hp{position:absolute;left:-9999px}
.notice{padding:12px 14px;border-radius:10px;font-size:14.5px}
.notice.ok{background:#e4f6ea;color:#17673a}.notice.err{background:#fdeaea;color:#a12626}

.sitefoot{background:#0f2f6e;color:#cfdaf0;padding:48px 0 70px;margin-top:0}
.sitefoot__in{display:grid;grid-template-columns:1.4fr 1fr 1.4fr;gap:40px}
.sitefoot h4{color:#fff;margin-bottom:12px;font-size:17px}
.sitefoot li{margin:7px 0;font-size:14.5px}
.sitefoot a:hover{color:var(--gold)}
.sitefoot p{font-size:14.5px}
.footer{margin-top:-30px}

@media (max-width:960px){
  .about-tease,.contact,.sitefoot__in{grid-template-columns:1fr}
  .svc-grid,.values,.steps ol,.proj-grid{grid-template-columns:1fr 1fr}
  .svc-grid--3,.news-grid{grid-template-columns:1fr 1fr}
  .cta__in{flex-direction:column;text-align:center}
  .section{padding:48px 0}
}
@media (max-width:560px){
  .svc-grid,.svc-grid--3,.values,.steps ol,.proj-grid,.news-grid{grid-template-columns:1fr}
  .job{flex-direction:column;align-items:flex-start}
}

/* ===== Parallax & hiệu ứng ===== */
.band{background-size:cover;background-position:center}
@media (hover:hover) and (min-width:961px){.band{background-attachment:fixed}}
.band--quote{padding:130px 0;text-align:center;color:#fff}
.band--quote blockquote{font-size:clamp(24px,3.4vw,42px);font-weight:700;line-height:1.3;max-width:860px;margin:0 auto 28px}
.band:not(.cta):not(.banner):not(.band--quote){padding:90px 0;color:#fff}
.sec-head--w h2{color:#fff}.sec-head--w .eyebrow{color:var(--gold)}
.why{display:grid;grid-template-columns:repeat(4,1fr);gap:22px}
.why>div{background:rgba(255,255,255,.08);border:1px solid rgba(255,255,255,.18);backdrop-filter:blur(4px);border-radius:16px;padding:30px 24px;text-align:center;transition:.3s}
.why>div:hover{background:rgba(255,255,255,.15);transform:translateY(-6px)}
.why svg{width:46px;height:46px;color:var(--gold);margin-bottom:12px}
.why h3{font-size:19px;margin-bottom:8px}.why p{font-size:14.5px;opacity:.88}
.steps--home{margin-top:0}
.faq{background:#fff;border-radius:12px;margin-bottom:12px;box-shadow:0 4px 14px rgba(23,64,143,.07);overflow:hidden}
.faq summary{cursor:pointer;padding:18px 22px;font-weight:600;color:var(--blue);list-style:none;display:flex;justify-content:space-between;gap:16px}
.faq summary::-webkit-details-marker{display:none}
.faq summary::after{content:"+";font-size:22px;line-height:1;color:var(--gold);transition:.25s}
.faq[open] summary::after{transform:rotate(45deg)}
.faq p{padding:0 22px 20px;color:var(--muted)}

.hero{will-change:transform}
.hero__bg{will-change:transform;height:118%}
.plx{will-change:transform}

.js .reveal{opacity:0;transform:translateY(34px);transition:opacity .8s ease,transform .8s ease}
.js .reveal.in{opacity:1;transform:none}
.js .reveal[data-d="1"]{transition-delay:.12s}.js .reveal[data-d="2"]{transition-delay:.24s}.js .reveal[data-d="3"]{transition-delay:.36s}
@media (max-width:960px){.why{grid-template-columns:1fr 1fr}}
@media (max-width:560px){.why{grid-template-columns:1fr}.band--quote{padding:90px 0}}
@media (prefers-reduced-motion:reduce){.js .reveal{opacity:1;transform:none;transition:none}.band{background-attachment:scroll}}