:root{
  --navy:#0D2B55;
  --navy-deep:#081B38;
  --green:#1B5E3A;
  --green-light:#2C7A4B;
  --maroon:#8C1D18;
  --maroon-light:#A8271F;
  --white:#FFFFFF;
  --gray-l:#F5F6F8;
  --gray-m:#E4E8EB;
  --ink:#16232E;
  --ink-soft:#5B6B77;
  --radius-lg:24px;
  --radius-md:16px;
  --radius-sm:10px;
  --shadow-soft:0 20px 50px -20px rgba(13,43,85,0.18);
  --shadow-card:0 12px 32px -14px rgba(13,43,85,0.15);
}
*{box-sizing:border-box; margin:0; padding:0;}
html{scroll-behavior:smooth;}
body{
  font-family:'Inter', sans-serif;
  color:var(--ink);
  background:var(--white);
  line-height:1.6;
  overflow-x:hidden;
}
h1,h2,h3,h4,.font-head{
  font-family:'Poppins', sans-serif;
  font-weight:600;
  letter-spacing:-0.01em;
  color:var(--navy);
}
a{text-decoration:none; color:inherit;}
img{max-width:100%; display:block;}
.wrap{max-width:1240px; margin:0 auto; padding:0 32px;}
@media (max-width:700px){ .wrap{padding:0 20px;} }
section{padding:112px 0;}
@media (max-width:900px){ section{padding:76px 0;} }
.eyebrow{
  font-family:'Poppins', sans-serif;
  font-size:0.78rem;
  font-weight:600;
  letter-spacing:0.14em;
  text-transform:uppercase;
  color:var(--green);
  display:flex; align-items:center; gap:10px;
  margin-bottom:18px;
}
.eyebrow::before{content:"";width:26px;height:2px;background:var(--maroon);border-radius:2px;}
.section-head{max-width:660px; margin-bottom:52px;}
.section-head h2{font-size:clamp(1.9rem,3.4vw,2.6rem); line-height:1.2;}
.section-head p{margin-top:16px; color:var(--ink-soft); font-size:1.05rem; max-width:560px;}
.center{text-align:center; margin-left:auto; margin-right:auto;}

.btn{
  display:inline-flex; align-items:center; gap:8px;
  padding:15px 28px;
  border-radius:100px;
  font-family:'Poppins', sans-serif;
  font-weight:600;
  font-size:0.92rem;
  cursor:pointer;
  border:none;
  position:relative;
  overflow:hidden;
  transition:transform .25s ease, box-shadow .25s ease;
}
.btn:active{transform:scale(0.97);}
.btn-maroon{background:linear-gradient(135deg,var(--maroon),var(--maroon-light)); color:#fff; box-shadow:0 10px 24px -8px rgba(140,29,24,0.45);}
.btn-maroon:hover{box-shadow:0 14px 30px -8px rgba(140,29,24,0.6);}
.btn-outline-w{background:rgba(255,255,255,0.08); color:#fff; border:1.5px solid rgba(255,255,255,0.55); backdrop-filter:blur(6px);}
.btn-outline-w:hover{background:rgba(255,255,255,0.18);}
.btn-navy{background:var(--navy); color:#fff;}
.btn-navy:hover{background:var(--navy-deep);}
.btn-green{background:var(--green); color:#fff;}
.btn-green:hover{background:var(--green-light);}
.ripple{position:absolute; border-radius:50%; background:rgba(255,255,255,0.5); transform:scale(0); animation:ripple .6s ease-out;}
@keyframes ripple{ to{ transform:scale(4); opacity:0; } }

.reveal{opacity:0; transform:translateY(24px); transition:opacity .7s cubic-bezier(.4,0,.2,1), transform .7s cubic-bezier(.4,0,.2,1);}
.reveal.visible{opacity:1; transform:translateY(0);}

/* HEADER */
header{
  position:fixed; top:0; left:0; right:0; z-index:200;
  background:rgba(228,232,237,0.96);
  backdrop-filter:blur(14px);
  border-bottom:1px solid rgba(13,43,85,0.08);
  transition:box-shadow .3s ease;
}
header.scrolled{box-shadow:0 8px 24px -12px rgba(13,43,85,0.15);}
.nav{display:flex; align-items:center; justify-content:space-between; padding:7px 0; min-height:61px;}
.logo{display:flex; align-items:center; gap:10px; font-family:'Poppins',sans-serif; font-weight:700; font-size:1.15rem; color:var(--navy);}
.logo-img{height:58px; width:auto; flex-shrink:0;}
.header-brand{font-size:1.12rem; white-space:nowrap;}
.logo span.sub{display:block; font-size:0.76rem; font-weight:600; letter-spacing:0.08em; color:var(--ink-soft); font-family:'Inter',sans-serif;}
.lang-toggle{
  font-weight:600; font-size:0.82rem; color:var(--navy);
  background:transparent; border:1.5px solid var(--gray-m); padding:9px 16px; border-radius:100px;
  cursor:pointer; transition:border-color .2s ease, color .2s ease;
}
.lang-toggle:hover{border-color:var(--navy); color:var(--navy-deep);}
.nav-links{display:flex; align-items:center; gap:27px; margin-left:auto; margin-right:34px;}
.nav-links a{
  font-size:0.9rem; font-weight:500; color:var(--ink);
  position:relative; padding:4px 0;
}
.nav-links a::after{content:"";position:absolute; left:0; bottom:0; height:2px; width:0; background:var(--maroon); transition:width .25s ease;}
.nav-links a:hover::after{width:100%;}
.nav-actions{display:flex; align-items:center; gap:14px;}
.trace-btn{
  font-weight:700; font-size:0.85rem; color:#fff;
  background:var(--navy); padding:12px 22px; border-radius:100px;
  display:flex; align-items:center; gap:6px;
  white-space:nowrap;
  transition:background .2s ease, transform .2s ease;
}
.trace-btn:hover{background:var(--navy-deep); transform:translateY(-1px);}
.burger{display:none; background:none; border:none; font-size:1.4rem; color:var(--navy); cursor:pointer;}
@media (max-width:960px){
  .nav-links{display:none;}
  .burger{display:block;}
}
@media (max-width:560px){
  .trace-btn{font-size:.76rem; padding:10px 14px;}
  .lang-toggle{padding:8px 13px;}
}

/* HERO */
.hero{
  position:relative;
  min-height:100vh;
  display:flex; align-items:center;
  background:var(--navy-deep);
  overflow:hidden;
  padding-top:90px;
  text-align:center;
}
.hero-bg-svg{position:absolute; inset:0; width:100%; height:100%; opacity:0.9;}
.hero-overlay{
  position:absolute; inset:0;
  background:radial-gradient(ellipse at 50% 30%, rgba(13,43,85,0.55) 0%, rgba(8,27,56,0.92) 70%);
}
.hero-content{
  position:relative; z-index:2;
  margin:0 auto;
  max-width:1120px;
  transform:translateY(-90px);
}
.hero-logo{
  width:120px; height:120px; margin:0 auto 28px;
  background:rgba(255,255,255,0.94);
  border-radius:28px;
  display:flex; align-items:center; justify-content:center;
  box-shadow:0 24px 60px -20px rgba(0,0,0,0.55);
  padding:14px;
}
.hero-logo img{width:100%; height:100%; object-fit:contain;}
.hero-eyebrow{
  display:inline-flex; align-items:center; gap:10px;
  padding:8px 16px; border-radius:100px;
  background:rgba(255,255,255,0.1); border:1px solid rgba(255,255,255,0.2);
  color:#fff; font-size:0.76rem; font-weight:600; letter-spacing:0.06em;
  backdrop-filter:blur(8px);
  margin-bottom:22px;
}
.hero-eyebrow .dot{width:7px; height:7px; border-radius:50%; background:var(--maroon-light); animation:pulse 2s infinite;}
@keyframes pulse{ 0%,100%{opacity:1;} 50%{opacity:0.4;} }
.hero h1{
  color:#fff; font-size:clamp(2rem,3.7vw,3.3rem); line-height:1.15;
  white-space:nowrap;
}
.hero .tagline{
  margin:22px auto 0; color:rgba(255,255,255,0.8); font-size:1.1rem; max-width:520px;
}
@media (max-width:1050px){
  .hero-content{max-width:900px; transform:translateY(-55px);}
  .hero h1{white-space:normal;}
}
@media (max-width:700px){
  .hero{padding-top:82px;}
  .hero-content{transform:translateY(-20px);}
  .hero-logo{width:104px; height:104px; margin-bottom:24px; border-radius:24px;}
  .hero-eyebrow{font-size:0.66rem; letter-spacing:0.035em; padding:8px 12px;}
  .hero .tagline{font-size:1rem;}
}

/* ABOUT */
.about{background:var(--white);}
.about-grid{display:grid; grid-template-columns:0.85fr 1.15fr; gap:64px; align-items:center;}
@media (max-width:900px){ .about-grid{grid-template-columns:1fr; gap:36px;} }
.about-visual{
  position:relative; border-radius:var(--radius-lg); overflow:hidden;
  background:linear-gradient(160deg,#eef4f0,#e6eef5);
  box-shadow:var(--shadow-soft);
  aspect-ratio:1/1;
}
.about-text p{color:var(--ink-soft); font-size:1.05rem; max-width:560px; margin-top:16px;}
.pillars{display:grid; grid-template-columns:repeat(4,1fr); gap:16px; margin-top:40px;}
@media (max-width:760px){ .pillars{grid-template-columns:repeat(2,1fr);} }
.pillar-tile{
  background:var(--gray-l);
  border-radius:var(--radius-md);
  padding:22px 18px;
  transition:transform .25s ease, box-shadow .25s ease, background .25s ease;
}
.pillar-tile:hover{transform:translateY(-6px); box-shadow:var(--shadow-card); background:#fff;}
.pillar-tile svg{width:30px; height:30px; margin-bottom:12px;}
.pillar-tile h4{font-size:0.98rem; color:var(--navy);}
.pillar-tile p{font-size:0.82rem; color:var(--ink-soft); margin-top:6px;}

/* SECTORS */
.sectors{background:var(--gray-l); padding:82px 0;}
.sectors .section-head{margin-bottom:28px;}
.sectors .section-head h2,.sectors .section-head p{display:none;}
.sector-grid{display:grid; grid-template-columns:repeat(3,1fr); gap:24px;}
@media (max-width:1000px){ .sector-grid{grid-template-columns:repeat(2,1fr);} }
@media (max-width:620px){ .sector-grid{grid-template-columns:1fr;} }
.sector-card{
  background:#fff; border-radius:var(--radius-lg);
  padding:24px 22px;
  box-shadow:var(--shadow-card);
  transition:transform .3s ease, box-shadow .3s ease;
  display:flex; flex-direction:column; gap:18px;
}
.sector-card:hover{transform:translateY(-8px); box-shadow:0 24px 50px -18px rgba(13,43,85,0.25);}
.sector-icon-box{
  width:44px; height:44px; border-radius:11px;
  display:flex; align-items:center; justify-content:center;
  background:linear-gradient(135deg,var(--navy),var(--green));
}
.sector-icon-box svg{width:22px; height:22px; color:#fff;}
.sector-card h3{font-size:1.12rem;}
.sector-card ul{list-style:none; display:flex; flex-direction:column; gap:6px;}
.sector-card ul li{font-size:0.87rem; color:var(--ink-soft); padding-left:16px; position:relative;}
.sector-card ul li::before{content:"";position:absolute; left:0; top:8px; width:6px; height:6px; border-radius:50%; background:var(--maroon);}
.sector-card .card-link{margin-top:auto; font-size:0.85rem; font-weight:600; color:var(--navy); display:inline-flex; align-items:center; gap:6px;}
.sector-card .card-btn{
  margin-top:auto; display:inline-flex; align-items:center; justify-content:center; gap:8px;
  padding:11px 18px; border-radius:100px; font-size:0.84rem; font-weight:600; color:#fff;
  background:var(--navy); transition:background .2s ease;
}
.sector-card .card-btn:hover{background:var(--navy-deep);}
.sector-card .card-btn.ext::after{content:"↗"; font-size:0.9em;}

/* WHY-LIKE TECH TILES removed per brief; keeping only essential sections */

/* NEWS */
.news{background:var(--white);}
.news-grid{display:grid; grid-template-columns:repeat(3,1fr); gap:22px;}
@media (max-width:900px){ .news-grid{grid-template-columns:1fr;} }
.news-card{border-radius:var(--radius-lg); overflow:hidden; box-shadow:var(--shadow-card); transition:transform .3s ease, box-shadow .3s ease; background:#fff;}
.news-card:hover{transform:translateY(-6px); box-shadow:0 24px 50px -18px rgba(13,43,85,0.22);}
.news-thumb{aspect-ratio:16/9; background:linear-gradient(135deg,var(--navy),var(--green)); background-size:cover !important; background-position:center !important;}
.news{padding:84px 0;}
.news .section-head{margin-bottom:34px;}
.news-modal{position:fixed;inset:0;z-index:400;background:rgba(8,27,56,.72);display:flex;align-items:flex-start;justify-content:center;padding:5vh 20px;overflow:auto;}
.news-modal.hidden{display:none;}
.news-modal-card{position:relative;background:#fff;border-radius:18px;width:min(820px,100%);padding:34px;box-shadow:0 28px 70px rgba(0,0,0,.25);}
.news-modal-close{position:absolute;right:16px;top:12px;border:0;background:none;font-size:1.8rem;cursor:pointer;color:var(--navy);}
.news-detail-content{margin-top:22px;white-space:pre-wrap;color:var(--ink);}
.news-detail-content img{display:block;max-width:100%;height:auto;margin:20px auto;border-radius:12px;}
.news-body{padding:22px;}
.news-cat{
  display:inline-block; font-size:0.7rem; font-weight:700; letter-spacing:0.06em;
  color:var(--green); background:rgba(27,94,58,0.1); padding:4px 10px; border-radius:100px; text-transform:uppercase;
}
.news-body h3{font-size:1.02rem; margin-top:12px; line-height:1.4;}
.news-date{font-size:0.78rem; color:var(--ink-soft); margin-top:8px;}
.news-more{margin-top:14px; display:inline-flex; gap:6px; font-size:0.85rem; font-weight:600; color:var(--navy);}
.news-footer{margin-top:44px; text-align:center;}

/* PARTNERS */
.partners{background:var(--navy-deep); overflow:hidden; padding:64px 0;}
.partners .section-head{color:#fff; margin-bottom:36px;}
.partners .eyebrow{color:var(--maroon-light);} .partners .eyebrow::before{background:var(--maroon-light);}
.partners h2{color:#fff;}
.logo-track{display:flex; gap:64px; width:max-content; animation:scroll 22s linear infinite;}
.logo-track span{
  font-family:'Poppins',sans-serif; font-weight:700; font-size:1.3rem; color:rgba(255,255,255,0.55);
  white-space:nowrap; transition:color .25s ease;
}
.logo-track span:hover{color:#fff;}
@keyframes scroll{ from{transform:translateX(0);} to{transform:translateX(-50%);} }

/* CONTACT */
.contact{background:var(--gray-l);}
.contact-grid{display:grid; grid-template-columns:0.85fr 1.15fr; gap:56px;}
@media (max-width:900px){ .contact-grid{grid-template-columns:1fr;} }
.contact-info{display:flex; flex-direction:column; gap:20px;}
.contact-info-card{
  background:#fff; border-radius:var(--radius-md); padding:20px 22px;
  display:flex; align-items:flex-start; gap:14px; box-shadow:var(--shadow-card);
}
.contact-info-card svg{width:22px; height:22px; color:var(--maroon); flex-shrink:0; margin-top:2px;}
.contact-info-card .label{font-size:0.75rem; color:var(--ink-soft); text-transform:uppercase; letter-spacing:0.06em;}
.contact-info-card .value{font-weight:600; color:var(--navy); margin-top:2px;}
.contact-form{background:#fff; border-radius:var(--radius-lg); padding:36px; box-shadow:var(--shadow-soft);}
.form-row{display:grid; grid-template-columns:1fr 1fr; gap:16px;}
@media (max-width:520px){ .form-row{grid-template-columns:1fr;} }
.field{display:flex; flex-direction:column; gap:6px; margin-bottom:16px;}
.field label{font-size:0.82rem; font-weight:600; color:var(--navy);}
.field input, .field textarea{
  padding:12px 14px; border:1.5px solid var(--gray-m); border-radius:var(--radius-sm);
  font-family:'Inter',sans-serif; font-size:0.92rem; outline:none; transition:border-color .2s ease;
}
.field input:focus, .field textarea:focus{border-color:var(--green);}
.field textarea{min-height:100px; resize:vertical;}

/* floating buttons */
.float-stack{position:fixed; bottom:28px; right:28px; z-index:150; display:flex; flex-direction:column; gap:14px; align-items:flex-end;}
.float-btn{
  width:56px; height:56px; border-radius:50%;
  display:flex; align-items:center; justify-content:center;
  box-shadow:0 14px 30px -8px rgba(13,43,85,0.5);
  cursor:pointer; color:#fff; transition:transform .2s ease;
}
.float-btn:hover{transform:scale(1.08);}
.float-btn svg{width:26px; height:26px;}
.float-btn.zalo{background:#0068FF;}
.float-btn.messenger{background:linear-gradient(135deg,#00B2FF,#006AFF);}
.float-btn.call{background:var(--green); animation:float 4s ease-in-out infinite;}
@keyframes float{ 0%,100%{transform:translateY(0);} 50%{transform:translateY(-10px);} }

/* FOOTER */
footer{background:var(--navy-deep); color:rgba(255,255,255,0.65); padding-top:72px;}
.footer-grid{display:grid; grid-template-columns:1.3fr 1fr 1fr 1fr; gap:40px; padding-bottom:44px; border-bottom:1px solid rgba(255,255,255,0.1);}
@media (max-width:800px){ .footer-grid{grid-template-columns:1fr 1fr; row-gap:32px;} }
.footer-col h4{color:#fff; font-family:'Poppins',sans-serif; font-size:0.82rem; letter-spacing:0.06em; text-transform:uppercase; margin-bottom:16px;}
.footer-col a, .footer-col p{display:block; font-size:0.9rem; margin-bottom:10px; color:rgba(255,255,255,0.62); transition:color .2s ease;}
.footer-col a:hover{color:#fff;}
.footer-logo{display:flex; align-items:center; gap:10px; margin-bottom:14px;}
.footer-logo-badge{
  width:50px; height:50px; border-radius:14px; background:#fff;
  display:flex; align-items:center; justify-content:center; padding:6px;
  flex-shrink:0; box-shadow:0 8px 20px -8px rgba(0,0,0,0.4);
}
.footer-logo-badge img{width:100%; height:100%; object-fit:contain;}
.footer-logo span{font-family:'Poppins',sans-serif; font-weight:700; color:#fff; font-size:1.05rem;}
.footer-tagline{font-size:0.8rem; color:rgba(255,255,255,0.55); margin-top:2px;}
.social-row{display:flex; gap:12px; margin-top:8px;}
.social-row a{
  width:36px; height:36px; border-radius:50%; background:rgba(255,255,255,0.08);
  display:flex; align-items:center; justify-content:center;
}
.social-row a svg{width:16px; height:16px;}
.footer-bottom{padding:22px 0; display:flex; justify-content:space-between; flex-wrap:wrap; gap:12px; font-size:0.8rem;}

a:focus-visible, button:focus-visible, input:focus-visible, textarea:focus-visible{
  outline:2px solid var(--maroon); outline-offset:2px;
}
@media (prefers-reduced-motion:reduce){
  *{animation:none !important; transition:none !important;}
}

/* ===== Bổ sung cho tích hợp Backend (form liên hệ, tin tức động) ===== */
.form-msg{
  font-size:0.9rem;
  min-height:1.2em;
  margin:-4px 0 4px;
}
.form-msg.success{ color:#1B5E3A; font-weight:600; }
.form-msg.error{ color:#8C1D18; font-weight:600; }
.news-loading{
  grid-column:1 / -1;
  text-align:center;
  color:var(--ink-soft);
  padding:32px 0;
}
.contact-form button[disabled]{ opacity:0.7; cursor:not-allowed; }