:root{
  --bg:#0b1220;                /* nền tối của hero overlay */
  --page:#0f172a;              /* nền tổng thể header/footer */
  --text:#0f172a;              /* văn bản chính */
  --muted:#4b5563;             /* văn bản phụ */
  --white:#ffffff;
  --primary:#1e3a8a;           /* xanh đậm */
  --primary-700:#1d4ed8;       /* xanh tươi hơn cho hover */
  --accent:#f59e0b;            /* cam nhấn */
  --teal:#0f766e;
  --gray:#f3f4f6;              /* xám nền section */
  --card:#ffffff;              /* nền card */
  --radius:8px;
  --shadow: 0 10px 30px rgba(2,6,23,.12);
  --shadow-lg: 0 22px 60px rgba(2,6,23,.18);
}

*{box-sizing:border-box}
html{scroll-behavior:smooth; scroll-padding-top:78px}
body{
  margin:0;
  font-family: "Manrope", system-ui, -apple-system, Segoe UI, Roboto, sans-serif;
  color:var(--text);
  background:#fff;
  line-height:1.6;
  overflow-x:hidden;
}

/* ===== Layout helpers ===== */
.container{
  width:min(1200px, 92%);
  margin-inline:auto;
}
.section{
  padding:72px 0;
  position:relative;
}
.section-wide{
  padding:88px 0;
}
.section-gray{
  background:var(--gray);
}
.section-title{
  font-size: clamp(24px, 3vw, 36px);
  line-height:1.2;
  margin:0 0 14px;
  font-weight:800;
}
.section-title .accent{color:var(--accent)}
.section-kicker{
  margin:0 0 12px;
  color:#c43a45;
  font-size:13px;
  font-weight:800;
  letter-spacing:.36em;
  text-transform:uppercase;
}
.section-lead{
  color:var(--muted);
  margin:0 0 32px;
}
.center{text-align:center}

/* ===== Header ===== */
.site-header{
  position:sticky; top:0; z-index:50;
  background:rgba(255,255,255,.7);
  backdrop-filter:saturate(1.2) blur(10px);
  border-bottom:1px solid rgba(15,23,42,.06);
  transition:box-shadow .25s ease, background-color .25s ease;
}
.header-inner{
  display:flex; align-items:center; justify-content:space-between;
  padding:14px 0;
}
.brand{display:flex; gap:10px; align-items:center; text-decoration:none; color:var(--text); font-weight:800}
.brand-logo{display:block; width:auto; height:42px; transition:transform .25s ease}
.brand:hover .brand-logo{transform:translateY(-2px)}
.brand .brand-mark{font-size:22px; transform-origin:50% 100%; transition:transform .25s ease}
.brand:hover .brand-mark{transform:translateY(-2px) rotate(-4deg)}
.brand .brand-text{font-size:18px}
.brand.compact .brand-text{font-weight:700}

.nav-toggle{
  display:none; background:none; border:0; padding:6px; cursor:pointer;
}
.nav-toggle span{display:block; width:26px; height:2px; background:#111; margin:5px 0; transition:.3s}
.nav-toggle.open span:nth-child(1){transform:translateY(7px) rotate(45deg)}
.nav-toggle.open span:nth-child(2){opacity:0}
.nav-toggle.open span:nth-child(3){transform:translateY(-7px) rotate(-45deg)}

.nav ul{list-style:none; display:flex; gap:24px; margin:0; padding:0}
.nav a{color:var(--text); text-decoration:none; font-weight:600; padding:10px 4px; position:relative; transition:color .2s ease}
.nav a:hover{color:var(--primary-700)}
.nav a::after{
  content:""; position:absolute; left:0; right:0; bottom:-6px; height:3px;
  background:var(--accent); border-radius:3px; transform:scaleX(0); transform-origin:left; transition:transform .25s ease;
}
.nav a.active::after{
  transform:scaleX(1);
}

/* ===== Hero ===== */
.hero{
  position:relative;
  min-height:clamp(520px, 72vh, 760px);
  display:grid;
  place-items:center start;
  overflow:hidden;
  padding:92px 0 86px;
  isolation:isolate;
}
.hero::after{
  content:"";
  position:absolute;
  left:0;
  right:0;
  bottom:-1px;
  height:72px;
  background:#fff;
  clip-path:polygon(0 56%, 100% 12%, 100% 100%, 0 100%);
  z-index:2;
}
.hero-media{
  position:absolute;
  inset:-6% 0;
  transform:translate3d(0, var(--hero-parallax, 0px), 0);
  will-change:transform;
  z-index:-2;
}
.hero-media img{
  position:absolute;
  inset:0;
  width:100%;
  height:100%;
  object-fit:cover;
  object-position:center;
  filter:saturate(1.02) contrast(1.05);
  transform:scale(1.04);
  animation:heroZoom 18s ease-in-out infinite alternate;
}
.hero-overlay{
  position:absolute; inset:0;
  background:
    linear-gradient(90deg, rgba(2,6,23,.82) 0%, rgba(2,6,23,.58) 42%, rgba(2,6,23,.24) 100%),
    linear-gradient(180deg, rgba(2,6,23,.16) 0%, rgba(2,6,23,.76) 100%);
}
.hero-motion{
  position:absolute;
  inset:0;
  pointer-events:none;
  z-index:-1;
  opacity:.9;
}
.route-line{
  position:absolute;
  left:-18%;
  width:56%;
  height:2px;
  background:linear-gradient(90deg, transparent, rgba(245,158,11,.08), rgba(245,158,11,.9), rgba(255,255,255,.65), transparent);
  box-shadow:0 0 18px rgba(245,158,11,.25);
  transform:rotate(-14deg) translateX(-15%);
  animation:routeSweep 6.5s ease-in-out infinite;
}
.route-line-1{top:31%; animation-delay:.2s}
.route-line-2{top:52%; width:48%; animation-delay:1.9s}
.route-line-3{top:71%; width:62%; animation-delay:3.4s}
.hero-eyebrow{
  display:inline-flex;
  align-items:center;
  gap:10px;
  margin:0 0 14px;
  padding:7px 12px;
  border:1px solid rgba(255,255,255,.28);
  border-radius:999px;
  background:rgba(255,255,255,.1);
  color:#fef3c7;
  font-size:13px;
  font-weight:800;
  text-transform:uppercase;
  letter-spacing:0;
}
.hero-content{
  position:relative; color:#fff; text-align:left; max-width:760px;
  z-index:3;
}
.hero-eyebrow,
.hero h1,
.hero-sub,
.hero-cta,
.hero-stats{
  opacity:0;
  transform:translateY(22px);
  animation:heroRise .8s cubic-bezier(.2,.8,.2,1) forwards;
}
.hero h1{
  font-size: clamp(32px, 5vw, 56px);
  line-height:1.08; margin:0 0 10px; font-weight:800;
  animation-delay:.12s;
}
.hero .accent{color:var(--accent)}
.hero-sub{margin:0 0 22px; color:#e5e7eb; font-size:clamp(14px,1.6vw,18px); animation-delay:.22s}
.hero-cta{display:flex; gap:14px; justify-content:flex-start; margin:8px 0 28px; animation-delay:.32s}

.btn{
  --bg: var(--primary);
  --fg: #fff;
  position:relative;
  display:inline-flex; align-items:center; justify-content:center;
  padding:12px 18px; border-radius:999px; text-decoration:none; font-weight:700;
  background:var(--bg); color:var(--fg); border:2px solid transparent; transition:transform .25s ease, box-shadow .25s ease, background-color .25s ease;
  overflow:hidden;
  isolation:isolate;
}
.btn::after{
  content:"";
  position:absolute;
  inset:-40% auto -40% -70%;
  width:56%;
  background:linear-gradient(90deg, transparent, rgba(255,255,255,.34), transparent);
  transform:skewX(-20deg);
  transition:left .55s ease;
  pointer-events:none;
}
.btn:hover::after{left:120%}
.btn:focus-visible{
  outline:3px solid rgba(245,158,11,.5);
  outline-offset:3px;
}
.btn:hover{transform:translateY(-1px); box-shadow:var(--shadow)}
.btn-primary{--bg: var(--primary); --fg:#fff}
.btn-primary:hover{background:var(--primary-700)}
.btn-ghost{--bg: transparent; --fg:#fff; border-color: rgba(255,255,255,.5)}
.btn-ghost:hover{background:rgba(255,255,255,.12)}
.btn-white{--bg:#fff; --fg:#111}
.btn-white:hover{background:#f8fafc}
.btn-block{width:100%}

.hero-stats{display:flex; gap:22px; justify-content:flex-start; flex-wrap:wrap; animation-delay:.44s}
.stat{
  backdrop-filter: blur(6px);
  background:rgba(255,255,255,.12);
  border:1px solid rgba(255,255,255,.25);
  color:#fff; padding:12px 16px; border-radius:8px; min-width:140px;
  text-align:center;
  transition:transform .25s ease, background-color .25s ease;
}
.stat:hover{transform:translateY(-4px); background:rgba(255,255,255,.18)}
.stat strong{font-size:22px; display:block}

/* ===== About ===== */
.grid-2{display:grid; grid-template-columns:1.2fr 1fr; gap:36px; align-items:center}
.media-card{
  border-radius:var(--radius); overflow:hidden; box-shadow:var(--shadow);
  transform:translateZ(0);
  transition:transform .35s ease, box-shadow .35s ease;
}
.media-card:hover{
  transform:translateY(-6px);
  box-shadow:var(--shadow-lg);
}
.media-card img{width:100%; height:100%; object-fit:cover; transition:transform .7s ease}
.media-card:hover img{transform:scale(1.04)}
.checklist{margin:16px 0 0; padding-left:18px}
.checklist li{margin:6px 0}
.about-badges{display:flex; gap:10px; flex-wrap:wrap; margin-top:12px}
.badge{background:#eef2ff; color:#1e3a8a; padding:6px 10px; border-radius:999px; font-weight:700; font-size:13px; transition:transform .2s ease, background-color .2s ease}
.badge:hover{transform:translateY(-2px); background:#dbeafe}

/* ===== Services ===== */
.cards{
  display:grid; grid-template-columns:repeat(3, 1fr); gap:22px;
}
.card{
  position:relative;
  background:var(--card); border-radius:8px; overflow:hidden; box-shadow:var(--shadow); display:flex; flex-direction:column;
  transition:transform .35s ease, box-shadow .35s ease;
  isolation:isolate;
}
.card::before{
  content:"";
  position:absolute;
  inset:0 0 auto;
  height:4px;
  background:linear-gradient(90deg, var(--accent), var(--teal));
  transform:scaleX(0);
  transform-origin:left;
  transition:transform .35s ease;
  z-index:2;
}
.card:hover{
  transform:translateY(-8px);
  box-shadow:var(--shadow-lg);
}
.card:hover::before{transform:scaleX(1)}
.card-media{
  overflow:hidden;
}
.card-media img{width:100%; height:220px; object-fit:cover; transition:transform .7s ease, filter .7s ease}
.card:hover .card-media img{transform:scale(1.06); filter:saturate(1.08)}
.card-body{padding:18px}
.card h3{margin:0 0 8px; font-size:20px}
.card p{margin:0; color:var(--muted)}

/* ===== Gallery ===== */
.fleet-events{
  display:grid;
  grid-template-columns:minmax(260px, .42fr) 1fr;
  gap:48px;
  align-items:start;
}
.events-left-col{
  min-height:100%;
}
.events-left-sticky{
  position:sticky;
  top:112px;
  padding-top:44px;
}
.fleet-events-intro{
  max-width:430px;
}
.fleet-events-intro .section-title{
  color:#c43a45;
  font-size:clamp(38px, 6vw, 68px);
  line-height:.94;
  text-transform:uppercase;
  max-width:360px;
}
.fleet-events-intro .section-lead{
  font-size:18px;
  margin-bottom:26px;
}
.fleet-event-list{
  position:relative;
  display:flex;
  flex-direction:column;
  gap:28px;
  padding:72px 6px 72px;
}
.fleet-event-card{
  --event-opacity:.4;
  --event-scale:.95;
  position:relative;
  min-height:460px;
  background:#fff;
  border:1px solid rgba(15,23,42,.08);
  border-radius:8px;
  overflow:hidden;
  box-shadow:var(--shadow);
  opacity:var(--event-opacity);
  transform:scale(var(--event-scale));
  transform-origin:center top;
  transition:box-shadow .3s ease, border-color .3s ease;
  will-change:transform, opacity;
}
.fleet-event-card:hover{
  box-shadow:var(--shadow-lg);
  border-color:rgba(196,58,69,.2);
}
.fleet-event-card.is-active{
  border-color:rgba(196,58,69,.28);
  box-shadow:var(--shadow-lg);
}
.fleet-event-media{
  position:relative;
  display:block;
  height:270px;
  overflow:hidden;
  background:#111827;
}
.fleet-event-media img{
  width:100%;
  height:100%;
  object-fit:cover;
  transition:transform .7s ease, filter .7s ease;
}
.fleet-event-card:hover .fleet-event-media img{
  transform:scale(1.06);
  filter:saturate(1.08);
}
.event-tags{
  position:absolute;
  top:18px;
  left:18px;
  right:18px;
  display:flex;
  gap:10px;
  flex-wrap:wrap;
  z-index:2;
}
.event-tags span{
  display:inline-flex;
  align-items:center;
  min-height:36px;
  padding:8px 14px;
  border-radius:999px;
  background:rgba(255,255,255,.92);
  color:#c43a45;
  box-shadow:0 8px 24px rgba(2,6,23,.12);
  font-size:12px;
  font-weight:800;
  text-transform:uppercase;
}
.fleet-event-body{
  padding:22px 24px 24px;
}
.fleet-event-body h3{
  margin:0 0 10px;
  color:#c43a45;
  font-size:clamp(24px, 3.1vw, 38px);
  line-height:1.08;
  letter-spacing:.035em;
  text-transform:uppercase;
}
.fleet-event-body p{
  margin:0;
  color:var(--muted);
}

/* ===== CTA Stripe ===== */
.cta-stripe{
  background: linear-gradient(90deg, #0f172a, #1e3a8a);
  background-size:180% 180%;
  color:#fff;
  animation:ctaShift 9s ease-in-out infinite alternate;
}
.cta-inner{
  display:flex; align-items:center; justify-content:space-between; gap:20px; padding:24px 0;
}
.cta-inner h3{margin:0; font-size:clamp(18px,2.5vw,24px); font-weight:800}

/* ===== Contact ===== */
.contact-list{list-style:none; padding:0; margin:14px 0 0; color:var(--muted)}
.contact-list li{margin:6px 0}

.contact-form{
  background:#fff; padding:22px; border-radius:8px; box-shadow:var(--shadow)
}
.form-row{display:grid; grid-template-columns:1fr 1fr; gap:12px}
label{display:block; font-weight:700; font-size:14px; margin:6px 0}
input, textarea{
  width:100%; margin-top:6px; padding:12px 12px; border:1px solid #e5e7eb; border-radius:8px;
  font:inherit; outline:none; transition:border-color .2s, box-shadow .2s;
}
input:focus, textarea:focus{
  border-color:#93c5fd; box-shadow:0 0 0 4px rgba(59,130,246,.15);
}
.form-note{color:var(--muted); font-size:13px; margin:8px 0 0}
.form-honeypot{
  position:absolute;
  left:-9999px;
  width:1px;
  height:1px;
  overflow:hidden;
}
.form-status{
  min-height:20px;
  margin:10px 0 0;
  color:var(--muted);
  font-size:14px;
  font-weight:700;
}
.form-status.success{color:var(--teal)}
.form-status.error{color:#b91c1c}
.contact-form .btn:disabled{
  cursor:not-allowed;
  opacity:.72;
  transform:none;
  box-shadow:none;
}

/* ===== Footer ===== */
.site-footer{
  background:var(--page); color:#cbd5e1; position:relative; margin-top:18px; padding:26px 0 46px;
}
.footer-inner{display:grid; grid-template-columns:1.2fr .8fr 1fr; gap:16px; align-items:start}
.footer-brand .brand{color:#fff}
.footer-logo{
  height:48px;
  padding:6px 8px;
  background:#fff;
  border-radius:8px;
}
.footer-nav{display:flex; flex-direction:column; gap:8px}
.footer-nav a{color:#cbd5e1; text-decoration:none}
.footer-nav a:hover{color:#fff}
.footer-copy{grid-column:1 / -1; margin-top:10px; font-size:13px; color:#9ca3af; border-top:1px solid rgba(255,255,255,.08); padding-top:10px}

.to-top{
  position:absolute; right:24px; bottom:18px; width:40px; height:40px; display:grid; place-items:center;
  text-decoration:none; background:#111827; color:#fff; border-radius:50%; border:1px solid rgba(255,255,255,.15);
  box-shadow:var(--shadow); font-weight:800; transition:transform .25s ease, background-color .25s ease;
}
.to-top:hover{transform:translateY(-3px); background:var(--primary)}

/* ===== Motion ===== */
.reveal-ready .reveal-item{
  opacity:0;
  transform:translateY(34px);
  transition:opacity .72s cubic-bezier(.2,.8,.2,1), transform .72s cubic-bezier(.2,.8,.2,1), box-shadow .35s ease;
  transition-delay:var(--reveal-delay, 0ms);
}
.reveal-ready .reveal-item.is-visible{
  opacity:1;
  transform:none;
}

@keyframes heroZoom{
  from{transform:scale(1.04)}
  to{transform:scale(1.1)}
}
@keyframes heroRise{
  to{opacity:1; transform:translateY(0)}
}
@keyframes routeSweep{
  0%{transform:rotate(-14deg) translateX(-18%); opacity:0}
  20%{opacity:1}
  72%{opacity:1}
  100%{transform:rotate(-14deg) translateX(260%); opacity:0}
}
@keyframes ctaShift{
  from{background-position:0% 50%}
  to{background-position:100% 50%}
}

/* ===== Responsive ===== */
@media (max-width: 1024px){
  .grid-2{grid-template-columns:1fr; gap:22px}
  .cards{grid-template-columns:1fr 1fr}
  .fleet-events{grid-template-columns:1fr; gap:30px}
  .fleet-events-intro{max-width:640px}
  .fleet-events-intro .section-title{max-width:560px}
  .events-left-sticky{position:static; padding-top:0}
  .fleet-event-list{padding:24px 0 0}
  .footer-inner{grid-template-columns:1fr 1fr}
}
@media (max-width: 768px){
  html{scroll-padding-top:64px}
  .nav{position:fixed; inset:64px 0 auto 0; background:#fff; border-bottom:1px solid rgba(15,23,42,.06);
       transform:translateY(-120%); transition:.3s; padding:14px 0; z-index:40}
  .nav ul{flex-direction:column; gap:0}
  .nav a{display:block; padding:14px 20px}
  .nav.open{transform:translateY(0)}
  .nav-toggle{display:block}
  .brand-logo{height:36px}
  .hero{
    min-height:clamp(560px, 78vh, 680px);
    padding:88px 0 76px;
  }
  .hero::after{height:48px}
  .hero-overlay{
    background:
      linear-gradient(180deg, rgba(2,6,23,.52) 0%, rgba(2,6,23,.82) 100%),
      linear-gradient(90deg, rgba(2,6,23,.72), rgba(2,6,23,.32));
  }
  .hero-motion{display:none}
  .hero-content{text-align:center; max-width:none}
  .hero-cta,
  .hero-stats{justify-content:center}
  .cards{grid-template-columns:1fr}
  .fleet-event-card{
    --event-opacity:1 !important;
    --event-scale:1 !important;
    min-height:auto;
  }
  .fleet-event-media{height:260px}
  .cta-inner{flex-direction:column; align-items:flex-start}
  .form-row{grid-template-columns:1fr}
}
@media (max-width: 480px){
  .section{padding:56px 0}
  .section-wide{padding:64px 0}
  .hero h1{font-size:clamp(30px, 11vw, 42px)}
  .hero-cta{flex-direction:column; align-items:stretch}
  .stat{min-width:126px; padding:10px 12px}
  .fleet-events-intro .section-title{font-size:clamp(34px, 13vw, 50px)}
  .fleet-event-media{height:220px}
  .fleet-event-body{padding:18px}
  .fleet-event-body h3{font-size:21px}
  .event-tags{top:12px; left:12px; right:12px}
  .event-tags span{min-height:32px; padding:7px 11px}
}

@media (prefers-reduced-motion: reduce){
  html{scroll-behavior:auto}
  *,
  *::before,
  *::after{
    animation-duration:.001ms !important;
    animation-iteration-count:1 !important;
    transition-duration:.001ms !important;
  }
  .hero-media{transform:none !important}
  .hero-eyebrow,
  .hero h1,
  .hero-sub,
  .hero-cta,
  .hero-stats,
  .fleet-event-card,
  .reveal-ready .reveal-item{
    opacity:1;
    transform:none;
  }
}