/* reset */
*,*::before,*::after{
  box-sizing:border-box;
  margin:0;
  padding:0;
}
html{scroll-behavior:smooth}
body{
  min-height:100vh;
  background:#060e1a;
  color:#eef4fb;
  font-family:'Plus Jakarta Sans',system-ui,sans-serif;
  font-size:16px;
  line-height:1.7;
  overflow-x:hidden;
}
img,svg{display:block;max-width:100%;height:auto;}
button,select,input,textarea{font:inherit;}
button{background:none;border:none;color:inherit;}
::selection{background:#0ea5e9;color:#000;}
::-webkit-scrollbar{width:3px;}
::-webkit-scrollbar-track{background:#060e1a;}
::-webkit-scrollbar-thumb{background:#0ea5e9;border-radius:2px;}
body::after{
  content:'';
  position:fixed;
  inset:0;
  z-index:0;
  pointer-events:none;
  background-image:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='300' height='300'%3E%3Cfilter id='g'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.75' numOctaves='4' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='300' height='300' filter='url(%23g)' opacity='0.03'/%3E%3C/svg%3E");
  opacity:.45;
}

/* variables */
:root{
  --navy:#060e1a;
  --deep:#0b1828;
  --card:#0e1f33;
  --accent:#0ea5e9;
  --accent2:#06b6d4;
  --dim:#8ba3bc;
  --muted:#3d5a73;
  --border:rgba(14,165,233,0.1);
  --glass:rgba(14,165,233,0.04);
  --white:#eef4fb;
  --font-head:'Playfair Display',Georgia,serif;
  --font-body:'Plus Jakarta Sans',system-ui,sans-serif;
}

/* layout */
.container{
  max-width:1180px;
  margin:0 auto;
  padding:0 2rem;
}
section{position:relative;z-index:1;}
main{position:relative;z-index:1;}
.text-center{text-align:center;}

/* components */
.tag{
  display:inline-flex;
  align-items:center;
  gap:.45rem;
  font-family:var(--font-body);
  font-size:.68rem;
  font-weight:700;
  letter-spacing:.14em;
  text-transform:uppercase;
  color:var(--accent);
  border:1px solid rgba(14,165,233,.22);
  background:rgba(14,165,233,.06);
  padding:.28rem .8rem;
  border-radius:100px;
  margin-bottom:1.4rem;
}
.tag::before{
  content:'';
  width:5px;
  height:5px;
  border-radius:50%;
  background:var(--accent);
  box-shadow:0 0 8px var(--accent);
  flex-shrink:0;
}
.section-title{
  font-family:var(--font-head);
  font-size:clamp(1.85rem,3.6vw,2.8rem);
  font-weight:800;
  line-height:1.15;
  letter-spacing:-.01em;
  margin-bottom:1rem;
}
.section-lead{
  font-size:1rem;
  color:var(--dim);
  max-width:520px;
  line-height:1.82;
  font-weight:400;
}
.section-lead--center{margin:0 auto;}

[data-lang="en"] .vi{display:none!important;}
[data-lang="vi"] .en{display:none!important;}

.site-nav{
  position:fixed;
  top:0;
  left:0;
  right:0;
  z-index:100;
  padding:1.2rem 0;
  transition:background .35s,padding .35s,border-color .35s;
  border-bottom:1px solid transparent;
}
.site-nav.scrolled{
  background:rgba(6,14,26,.93);
  backdrop-filter:blur(24px);
  -webkit-backdrop-filter:blur(24px);
  border-bottom-color:var(--border);
  padding:.8rem 0;
}
.nav-inner{
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:1.5rem;
}
.nav-brand{display:flex;align-items:center;text-decoration:none;flex-shrink:0;}
.site-logo{height:36px;width:auto;transition:opacity .2s;}
.nav-brand:hover .site-logo{opacity:.85;}
.nav-links{
  display:flex;
  align-items:center;
  gap:2.2rem;
  list-style:none;
}
.nav-links a{
  font-size:.875rem;
  font-weight:500;
  color:var(--dim);
  text-decoration:none;
  transition:color .2s;
  position:relative;
}
.nav-links a::after{
  content:'';
  position:absolute;
  bottom:-3px;
  left:0;
  right:0;
  height:1px;
  background:var(--accent);
  transform:scaleX(0);
  transition:transform .25s;
}
.nav-links a:hover{color:var(--white);}
.nav-links a:hover::after{transform:scaleX(1);}
.nav-cta{
  background:var(--accent)!important;
  color:#000!important;
  font-weight:700!important;
  padding:.45rem 1.15rem!important;
  border-radius:7px;
  transition:opacity .2s,transform .2s!important;
}
.nav-cta:hover{opacity:.85;transform:translateY(-1px);}
.nav-actions{
  display:flex;
  align-items:center;
  gap:1rem;
}
.nav-hamburger{
  display:none;
  background:none;
  border:none;
  cursor:pointer;
  flex-direction:column;
  gap:5px;
  padding:.25rem;
}
.nav-hamburger span{
  display:block;
  width:22px;
  height:2px;
  background:var(--white);
  border-radius:2px;
  transition:transform .3s,opacity .3s;
}
.lang-btn{
  display:flex;
  align-items:center;
  background:rgba(14,165,233,.07);
  border:1px solid rgba(14,165,233,.18);
  border-radius:8px;
  overflow:hidden;
  flex-shrink:0;
}
.lang-opt{
  padding:.36rem .72rem;
  font-size:.72rem;
  font-weight:700;
  letter-spacing:.06em;
  color:var(--dim);
  cursor:pointer;
  background:none;
  line-height:1;
  transition:background .2s,color .2s;
}
.lang-opt.active{background:var(--accent);color:#000;}
.lang-opt:not(.active):hover{color:var(--white);}
.mobile-menu{
  display:none;
  position:fixed;
  inset:0;
  z-index:99;
  background:rgba(6,14,26,.97);
  backdrop-filter:blur(20px);
  flex-direction:column;
  align-items:center;
  justify-content:center;
  gap:2rem;
}
.mobile-menu.open{display:flex;}
.mobile-menu a{
  font-family:var(--font-head);
  font-size:1.85rem;
  font-weight:800;
  color:var(--white);
  text-decoration:none;
  transition:color .2s;
  font-style:italic;
}
.mobile-menu a:hover{color:var(--accent);}
.mobile-close{
  position:absolute;
  top:1.5rem;
  right:1.8rem;
  background:none;
  border:none;
  color:var(--dim);
  cursor:pointer;
  font-size:1.4rem;
  line-height:1;
}
.mobile-logo svg{height:40px;width:auto;}

.site-hero{min-height:100vh;display:flex;align-items:center;padding:8rem 0 6rem;position:relative;overflow:hidden;}
.hero-bg{position:absolute;inset:0;pointer-events:none;}
.orb{position:absolute;border-radius:50%;filter:blur(90px);}
.orb-1{width:650px;height:650px;background:var(--accent);opacity:.13;top:-180px;right:-100px;}
.orb-2{width:400px;height:400px;background:#0f3460;opacity:.2;bottom:-80px;left:-80px;}
.orb-3{width:280px;height:280px;background:var(--accent2);opacity:.06;top:45%;left:42%;}
.hero-grid{position:absolute;inset:0;background-image:linear-gradient(rgba(14,165,233,.045) 1px,transparent 1px),linear-gradient(90deg,rgba(14,165,233,.045) 1px,transparent 1px);background-size:64px 64px;mask-image:radial-gradient(ellipse 75% 75% at 65% 45%,black 0%,transparent 100%);}
.hero-inner{position:relative;max-width:840px;}
.hero-eyebrow{display:flex;align-items:center;gap:.8rem;margin-bottom:2rem;opacity:0;animation:fadeUp .8s ease forwards .15s;}
.live-dot{width:8px;height:8px;border-radius:50%;background:var(--accent);box-shadow:0 0 14px var(--accent);animation:blink 2.2s ease infinite;flex-shrink:0;}
.hero-eyebrow-txt{font-size:.74rem;font-weight:600;color:var(--accent);letter-spacing:.14em;text-transform:uppercase;}
.hero-title{
  font-family:var(--font-head);
  font-size:clamp(3rem,7.5vw,5.8rem);
  font-weight:900;
  line-height:1.04;
  letter-spacing:-.025em;
  margin-bottom:1.8rem;
  opacity:0;
  animation:fadeUp .9s ease forwards .35s;
}
.hero-title .ital{font-style:italic;color:transparent;-webkit-text-stroke:1.5px var(--accent);}
.hero-title .acc{color:var(--accent);}
.hero-desc{
  font-size:1.1rem;
  color:var(--dim);
  line-height:1.82;
  max-width:560px;
  margin-bottom:2.8rem;
  font-weight:400;
  opacity:0;
  animation:fadeUp .9s ease forwards .55s;
}
.hero-actions{display:flex;align-items:center;gap:1rem;flex-wrap:wrap;opacity:0;animation:fadeUp .9s ease forwards .75s;}
.btn-primary,
.btn-ghost{
  display:inline-flex;
  align-items:center;
  gap:.6rem;
  border-radius:9px;
  text-decoration:none;
  font-family:var(--font-body);
  transition:transform .22s,box-shadow .22s,color .22s,border-color .22s;
}
.btn-primary{
  background:var(--accent);
  color:#000;
  font-weight:700;
  font-size:.9rem;
  padding:.85rem 2rem;
  box-shadow:0 0 40px rgba(14,165,233,.3);
}
.btn-primary:hover{transform:translateY(-2px);box-shadow:0 0 60px rgba(14,165,233,.45);}
.btn-ghost{
  color:var(--dim);
  font-size:.9rem;
  font-weight:500;
  border:1px solid rgba(255,255,255,.1);
  padding:.85rem 1.8rem;
}
.btn-ghost:hover{color:var(--white);border-color:rgba(255,255,255,.22);}
.hero-stats{display:flex;gap:3rem;margin-top:4rem;opacity:0;animation:fadeUp .9s ease forwards .95s;padding-top:2.5rem;border-top:1px solid var(--border);}
.hero-stats > div{min-width:120px;}
.stat-num{font-family:var(--font-head);font-size:2.4rem;font-weight:800;line-height:1;color:var(--white);}
.stat-num em{font-style:normal;color:var(--accent);}
.stat-label{font-size:.76rem;color:var(--muted);margin-top:.25rem;font-weight:600;}

#clients{padding:2.5rem 0;border-top:1px solid var(--border);border-bottom:1px solid var(--border);overflow:hidden;}
.clients-label{font-size:.67rem;letter-spacing:.2em;text-transform:uppercase;color:var(--muted);text-align:center;margin-bottom:1.8rem;font-weight:600;}
.marquee-wrap{overflow:hidden;}
.marquee-track{display:flex;align-items:center;gap:3.5rem;width:max-content;animation:marquee 30s linear infinite;}
.marquee-track:hover{animation-play-state:paused;}
@keyframes marquee{from{transform:translateX(0);}to{transform:translateX(-50%);}}
.client-pill{font-size:.875rem;font-weight:600;color:var(--muted);white-space:nowrap;cursor:default;transition:color .25s;}
.client-pill:hover{color:var(--white);}
.sep{color:var(--muted);opacity:.3;}

#about{padding:8rem 0;}
.about-grid{display:grid;grid-template-columns:1fr 1fr;gap:5rem;align-items:center;}
.about-card{
  background:var(--card);
  border:1px solid var(--border);
  border-radius:20px;
  padding:2.5rem;
  position:relative;
  overflow:hidden;
}
.about-card::before{
  content:'';
  position:absolute;
  top:0;
  left:0;
  right:0;
  height:1px;
  background:linear-gradient(90deg,transparent,var(--accent) 50%,transparent);
}
.glow-p{
  position:absolute;
  top:-70px;
  right:-70px;
  width:220px;
  height:220px;
  border-radius:50%;
  background:var(--accent);
  opacity:.05;
  filter:blur(50px);
  pointer-events:none;
}
.about-badge{
  display:inline-flex;
  align-items:baseline;
  gap:.5rem;
  background:rgba(14,165,233,.08);
  border:1px solid rgba(14,165,233,.18);
  border-radius:10px;
  padding:.7rem 1.1rem;
  margin-bottom:1.8rem;
}
.badge-num{font-family:var(--font-head);font-size:1.6rem;font-weight:900;color:var(--accent);line-height:1;}
.badge-sub{font-size:.75rem;color:var(--dim);font-weight:500;}
.card-body{font-size:.84rem;color:var(--dim);line-height:1.82;margin-bottom:1.8rem;}
.facts-grid{display:grid;grid-template-columns:1fr 1fr;gap:1rem;}
.fact-box{
  background:rgba(255,255,255,.025);
  border:1px solid var(--border);
  border-radius:12px;
  padding:1.1rem 1rem;
}
.fact-n{font-family:var(--font-head);font-size:1.9rem;font-weight:900;line-height:1;color:var(--white);}
.fact-n em{font-style:normal;color:var(--accent);}
.fact-l{font-size:.7rem;color:var(--muted);margin-top:.25rem;font-weight:600;text-transform:uppercase;letter-spacing:.06em;}
.about-text p{color:var(--dim);margin-bottom:1.2rem;font-size:.975rem;line-height:1.85;font-weight:400;}

#services{padding:8rem 0;}
.services-head{display:grid;grid-template-columns:1fr 1fr;gap:4rem;align-items:end;margin-bottom:3.5rem;}
.svc-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:1px;background:var(--border);border:1px solid var(--border);border-radius:18px;overflow:hidden;}
.svc-card{
  background:var(--deep);
  padding:2.4rem;
  position:relative;
  overflow:hidden;
  transition:background .3s;
  cursor:default;
}
.svc-card:hover{background:#0d2540;}
.svc-card::after{
  content:'';
  position:absolute;
  bottom:0;
  left:0;
  right:0;
  height:1.5px;
  background:linear-gradient(90deg,var(--accent),var(--accent2));
  transform:scaleX(0);
  transform-origin:left;
  transition:transform .4s ease;
}
.svc-card:hover::after{transform:scaleX(1);}
.svc-icon{
  width:50px;
  height:50px;
  border-radius:13px;
  background:rgba(14,165,233,.08);
  border:1px solid rgba(14,165,233,.18);
  display:flex;
  align-items:center;
  justify-content:center;
  font-size:1.5rem;
  margin-bottom:1.5rem;
  transition:background .3s;
}
.svc-card:hover .svc-icon{background:rgba(14,165,233,.16);}
.svc-title{font-family:var(--font-head);font-size:1rem;font-weight:700;color:var(--white);margin-bottom:.7rem;line-height:1.3;}
.svc-desc{font-size:.84rem;color:var(--muted);line-height:1.75;}

#portfolio{padding:8rem 0;}
.port-grid{display:grid;grid-template-columns:repeat(5,1fr);gap:1rem;margin-top:3rem;}
.port-card{
  background:var(--glass);
  border:1px solid var(--border);
  border-radius:16px;
  padding:2rem 1.4rem;
  text-align:center;
  transition:transform .3s,border-color .3s,box-shadow .3s;
  cursor:default;
}
.port-card:hover{transform:translateY(-7px);border-color:rgba(14,165,233,.35);box-shadow:0 24px 60px rgba(0,0,0,.4),0 0 40px rgba(14,165,233,.08);}
.port-logo{
  width:58px;
  height:58px;
  border-radius:15px;
  background:rgba(255,255,255,.05);
  border:1px solid var(--border);
  display:flex;
  align-items:center;
  justify-content:center;
  margin:0 auto 1.1rem;
  font-family:var(--font-head);
  font-size:.62rem;
  font-weight:900;
  color:var(--accent);
  text-align:center;
  line-height:1.3;
}
.port-name{font-family:var(--font-head);font-size:.9rem;font-weight:700;color:var(--white);margin-bottom:.35rem;}
.port-type{font-size:.72rem;color:var(--muted);font-weight:500;}

#why{padding:8rem 0;}
.why-grid{display:grid;grid-template-columns:1fr 1fr;gap:1.2rem;margin-top:3.5rem;}
.why-card{
  background:var(--glass);
  border:1px solid var(--border);
  border-radius:18px;
  padding:2.4rem;
  display:flex;
  gap:1.6rem;
  transition:border-color .3s,background .3s;
}
.why-card:hover{border-color:rgba(14,165,233,.25);background:rgba(14,165,233,.04);}
.why-n{
  font-family:var(--font-head);
  font-size:2.8rem;
  font-weight:900;
  color:rgba(14,165,233,.1);
  line-height:1;
  flex-shrink:0;
  width:2.8rem;
  font-style:italic;
}
.why-title{font-family:var(--font-head);font-size:1.05rem;font-weight:700;color:var(--white);margin-bottom:.6rem;}
.why-desc{font-size:.875rem;color:var(--muted);line-height:1.8;}

#network{padding:8rem 0;}
.net-grid{display:grid;grid-template-columns:repeat(6,1fr);gap:1rem;margin-top:2.5rem;}
.net-card{
  background:rgba(255,255,255,.04);
  border:1px solid var(--border);
  border-radius:14px;
  padding:1.4rem .8rem .9rem;
  display:flex;
  flex-direction:column;
  align-items:center;
  gap:.7rem;
  cursor:default;
  transition:transform .25s,border-color .25s,background .25s;
}
.net-card:hover{transform:translateY(-4px);border-color:rgba(14,165,233,.3);background:rgba(14,165,233,.06);}
.net-card-icon{width:56px;height:56px;display:flex;align-items:center;justify-content:center;}
.net-card-icon svg{width:100%;height:100%;}
.net-card-name{font-size:.72rem;font-weight:600;color:var(--dim);text-align:center;line-height:1.3;letter-spacing:.02em;}
.net-card:hover .net-card-name{color:var(--white);}

#approach{padding:8rem 0;}
.approach-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:0;margin-top:4.5rem;position:relative;}
.approach-line{position:absolute;top:1.85rem;left:calc(12.5% + 2rem);right:calc(12.5% + 2rem);height:1px;background:linear-gradient(90deg,transparent,rgba(14,165,233,.4) 15%,rgba(14,165,233,.4) 85%,transparent);}
.approach-step{text-align:center;padding:0 1.8rem;position:relative;}
.approach-dot{
  width:3.8rem;
  height:3.8rem;
  border-radius:50%;
  background:var(--deep);
  border:2px solid var(--accent);
  display:flex;
  align-items:center;
  justify-content:center;
  margin:0 auto 1.5rem;
  font-family:var(--font-head);
  font-size:.85rem;
  font-weight:900;
  color:var(--accent);
  box-shadow:0 0 24px rgba(14,165,233,.2);
  position:relative;
  z-index:1;
  font-style:italic;
}
.approach-title{font-family:var(--font-head);font-size:1rem;font-weight:700;color:var(--white);margin-bottom:.6rem;}
.approach-desc{font-size:.82rem;color:var(--muted);line-height:1.78;}

#cta{padding:8rem 0;}
.cta-box{
  background:linear-gradient(135deg,rgba(14,165,233,.07) 0%,rgba(15,52,96,.35) 100%);
  border:1px solid rgba(14,165,233,.2);
  border-radius:26px;
  padding:5.5rem 4rem;
  text-align:center;
  position:relative;
  overflow:hidden;
}
.cta-box::before{
  content:'';
  position:absolute;
  top:-120px;
  left:50%;
  transform:translateX(-50%);
  width:500px;
  height:500px;
  border-radius:50%;
  background:var(--accent);
  opacity:.05;
  filter:blur(100px);
  pointer-events:none;
}
.cta-title{font-family:var(--font-head);font-size:clamp(2rem,4.2vw,3.1rem);font-weight:900;line-height:1.12;margin-bottom:1.2rem;font-style:italic;}
.cta-desc{font-size:1rem;color:var(--dim);margin-bottom:2.6rem;max-width:460px;margin-left:auto;margin-right:auto;line-height:1.82;}
.cta-acts{display:flex;gap:1rem;justify-content:center;flex-wrap:wrap;}
.cta-note{font-size:.82rem;color:var(--muted);margin-top:1.4rem;}
.cta-note a{color:var(--accent);text-decoration:none;}
.cta-note a:hover{text-decoration:underline;}

.site-footer{border-top:1px solid var(--border);padding:4.5rem 0 2.5rem;}
.foot-grid{display:grid;grid-template-columns:2fr 1fr 1fr;gap:4rem;margin-bottom:3rem;}
.foot-logo{font-family:var(--font-head);font-size:1.25rem;font-weight:800;margin-bottom:.8rem;}
.foot-desc{font-size:.875rem;color:var(--muted);line-height:1.75;margin-bottom:1.5rem;}
.foot-ci{display:flex;align-items:flex-start;gap:.7rem;font-size:.8rem;color:var(--muted);margin-bottom:.65rem;}
.foot-ci svg{flex-shrink:0;margin-top:2px;}
.foot-col-h{font-size:.7rem;font-weight:700;letter-spacing:.12em;text-transform:uppercase;color:var(--dim);margin-bottom:1.2rem;}
.foot-links{list-style:none;}
.foot-links li{margin-bottom:.55rem;}
.foot-links a{font-size:.875rem;color:var(--muted);text-decoration:none;transition:color .2s;}
.foot-links a:hover{color:var(--white);}
.foot-bottom{border-top:1px solid var(--border);padding-top:2rem;display:flex;align-items:center;justify-content:space-between;flex-wrap:wrap;gap:1rem;}
.foot-copy{font-size:.78rem;color:var(--muted);}
.foot-bar{width:36px;height:3px;background:var(--accent);border-radius:2px;}

/* utilities */
@keyframes blink{0%,100%{opacity:1;transform:scale(1);}50%{opacity:.5;transform:scale(1.4);}}
@keyframes fadeUp{from{opacity:0;transform:translateY(26px);}to{opacity:1;transform:translateY(0);}}
.reveal{opacity:0;transform:translateY(32px);transition:opacity .75s ease,transform .75s ease;}
.reveal.visible{opacity:1;transform:translateY(0);}
.d1{transition-delay:.12s;}
.d2{transition-delay:.22s;}
.d3{transition-delay:.32s;}
.d4{transition-delay:.42s;}

.menu-open{overflow:hidden;}

@media(max-width:1024px){
  .svc-grid{grid-template-columns:repeat(2,1fr);}
  .port-grid{grid-template-columns:repeat(3,1fr);}
  .approach-grid{grid-template-columns:repeat(2,1fr);gap:2.5rem;}
  .approach-line{display:none;}
  .about-grid{grid-template-columns:1fr;gap:3rem;}
  .services-head{grid-template-columns:1fr;gap:1.2rem;}
}
@media(max-width:768px){
  .nav-links{display:none;}
  .nav-hamburger{display:flex;}
  .hero-stats{gap:1.8rem;}
  .svc-grid{grid-template-columns:1fr;}
  .port-grid{grid-template-columns:repeat(2,1fr);}
  .why-grid{grid-template-columns:1fr;}
  .foot-grid{grid-template-columns:1fr;gap:2.2rem;}
  .cta-box{padding:3.5rem 1.8rem;}
  .approach-grid{grid-template-columns:1fr 1fr;}
}
@media(max-width:480px){
  .port-grid{grid-template-columns:1fr 1fr;}
  .hero-stats{flex-direction:column;gap:1.2rem;}
  .approach-grid{grid-template-columns:1fr;}
}