/* ==========================================================================
   Anh Duong Technologies — shared stylesheet
   ========================================================================== */

:root{
  --bg:#070B14;
  --surface:rgba(255,255,255,.035);
  --surface-2:rgba(255,255,255,.055);
  --border:rgba(255,255,255,.09);
  --border-strong:rgba(255,255,255,.16);
  --text:#E8ECF5;
  --muted:#8E9CB4;
  --muted-2:#67748C;
  --cyan:#22D3EE;
  --indigo:#6366F1;
  --violet:#A78BFA;
  --grad:linear-gradient(120deg,#22D3EE 0%,#6366F1 55%,#A78BFA 100%);
  --radius:16px;
  --maxw:1160px;
  --ease:cubic-bezier(.22,.61,.36,1);
}

*,*::before,*::after{box-sizing:border-box}
html{scroll-behavior:smooth}
body{
  margin:0;background:var(--bg);color:var(--text);
  font-family:'Inter',-apple-system,BlinkMacSystemFont,'Segoe UI',Roboto,Helvetica,Arial,sans-serif;
  font-size:16px;line-height:1.65;-webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block}
a{color:inherit;text-decoration:none}
::selection{background:rgba(99,102,241,.35)}
:focus-visible{outline:2px solid var(--cyan);outline-offset:3px;border-radius:6px}

.wrap{width:100%;max-width:var(--maxw);margin:0 auto;padding:0 24px}

/* anchor: chua khoang cho header dinh */
[id]{scroll-margin-top:96px}

/* ---------- ambient background ---------- */
.bg-fx{position:fixed;inset:0;z-index:0;pointer-events:none;overflow:hidden}
.bg-fx .orb{position:absolute;border-radius:50%;filter:blur(90px);opacity:.5}
.orb-1{width:560px;height:560px;top:-220px;left:-140px;background:radial-gradient(circle,rgba(34,211,238,.42),transparent 68%)}
.orb-2{width:640px;height:640px;top:-160px;right:-220px;background:radial-gradient(circle,rgba(99,102,241,.40),transparent 68%)}
.orb-3{width:700px;height:700px;bottom:-380px;left:30%;background:radial-gradient(circle,rgba(167,139,250,.22),transparent 70%)}
.bg-fx .grid{
  position:absolute;inset:0;
  background-image:linear-gradient(rgba(255,255,255,.045) 1px,transparent 1px),
                   linear-gradient(90deg,rgba(255,255,255,.045) 1px,transparent 1px);
  background-size:64px 64px;
  mask-image:radial-gradient(ellipse 90% 60% at 50% 0%,#000 25%,transparent 78%);
  -webkit-mask-image:radial-gradient(ellipse 90% 60% at 50% 0%,#000 25%,transparent 78%);
}

/* ---------- header ---------- */
header{
  position:sticky;top:0;z-index:50;
  backdrop-filter:blur(14px);-webkit-backdrop-filter:blur(14px);
  background:rgba(7,11,20,.72);border-bottom:1px solid transparent;
  transition:border-color .3s var(--ease),background .3s var(--ease);
}
header.scrolled{border-bottom-color:var(--border);background:rgba(7,11,20,.9)}
.nav{display:flex;align-items:center;justify-content:space-between;gap:20px;height:72px}
.brand{display:flex;align-items:center;gap:11px;font-weight:700;letter-spacing:-.2px;font-size:16.5px}
.brand svg{flex:0 0 auto}
.brand span small{display:block;font-size:10.5px;font-weight:500;letter-spacing:1.6px;color:var(--muted-2);text-transform:uppercase;margin-top:-3px}
.nav-links{display:flex;align-items:center;gap:6px}
.nav-links a{padding:8px 14px;border-radius:9px;font-size:14px;color:var(--muted);transition:color .2s var(--ease),background .2s var(--ease)}
.nav-links a:hover{color:var(--text);background:var(--surface)}
.nav-links a.active{color:var(--text);background:var(--surface-2)}
.nav-cta{
  display:inline-flex;align-items:center;gap:8px;padding:9px 18px;border-radius:10px;
  font-size:14px;font-weight:600;background:var(--grad);color:#04070E;
  box-shadow:0 6px 22px rgba(99,102,241,.28);
  transition:transform .2s var(--ease),box-shadow .2s var(--ease);
}
.nav-cta:hover{transform:translateY(-1px);box-shadow:0 10px 28px rgba(99,102,241,.42)}
.burger{display:none;background:var(--surface);border:1px solid var(--border);color:var(--text);
  width:42px;height:42px;border-radius:10px;cursor:pointer;align-items:center;justify-content:center}
.burger svg{width:19px;height:19px}

/* ---------- hero (home) ---------- */
.hero{position:relative;z-index:1;padding:96px 0 78px;text-align:center}
.eyebrow{
  display:inline-flex;align-items:center;gap:9px;padding:7px 15px;border-radius:999px;
  border:1px solid var(--border);background:var(--surface);
  font-size:12.5px;font-weight:500;color:var(--muted);letter-spacing:.4px;margin-bottom:26px;
}
.dot{width:6px;height:6px;border-radius:50%;background:var(--cyan);box-shadow:0 0 10px var(--cyan)}
h1{font-size:clamp(2.05rem,5.2vw,3.65rem);line-height:1.1;letter-spacing:-1.6px;font-weight:800;margin:0 auto 22px;max-width:930px}
.grad-text{background:var(--grad);-webkit-background-clip:text;background-clip:text;color:transparent}
.lede{font-size:clamp(1rem,1.45vw,1.16rem);color:var(--muted);max-width:690px;margin:0 auto 34px}
.cta-row{display:flex;gap:13px;justify-content:center;flex-wrap:wrap}
.btn{
  display:inline-flex;align-items:center;gap:9px;padding:13px 26px;border-radius:11px;
  font-size:14.5px;font-weight:600;
  transition:transform .2s var(--ease),box-shadow .2s var(--ease),border-color .2s var(--ease),background .2s var(--ease);
}
.btn-primary{background:var(--grad);color:#04070E;box-shadow:0 8px 26px rgba(99,102,241,.3)}
.btn-primary:hover{transform:translateY(-2px);box-shadow:0 14px 34px rgba(99,102,241,.45)}
.btn-ghost{border:1px solid var(--border-strong);color:var(--text);background:var(--surface)}
.btn-ghost:hover{background:var(--surface-2);transform:translateY(-2px)}

/* ---------- page hero (sub-pages) ---------- */
.page-hero{position:relative;z-index:1;padding:72px 0 56px;border-bottom:1px solid var(--border)}
.page-hero .sec-tag{margin-bottom:14px}
.page-hero h1{font-size:clamp(1.9rem,4.4vw,3rem);text-align:left;margin:0 0 18px;max-width:820px}
.page-hero p{color:var(--muted);font-size:1.08rem;max-width:720px;margin:0}
.breadcrumb{display:flex;gap:9px;align-items:center;font-size:12.5px;color:var(--muted-2);margin-bottom:22px}
.breadcrumb a:hover{color:var(--text)}
.breadcrumb span{opacity:.5}

/* ---------- badges ---------- */
.badges{position:relative;z-index:1;padding:0 0 84px}
.badge-row{display:flex;flex-wrap:wrap;justify-content:center;gap:10px;padding-top:30px;border-top:1px solid var(--border)}
.badge{
  display:inline-flex;align-items:center;gap:8px;padding:8px 15px;border-radius:999px;
  border:1px solid var(--border);background:var(--surface);font-size:12.8px;color:var(--muted);font-weight:500;
}
.badge svg{width:14px;height:14px;color:var(--cyan);flex:0 0 auto}

/* ---------- sections ---------- */
section{position:relative;z-index:1}
.sec{padding:86px 0}
.sec-head{max-width:720px;margin-bottom:52px}
.sec-tag{display:inline-block;font-size:12px;font-weight:600;letter-spacing:2.2px;text-transform:uppercase;color:var(--cyan);margin-bottom:15px}
h2{font-size:clamp(1.6rem,3.2vw,2.35rem);line-height:1.2;letter-spacing:-1px;font-weight:750;margin:0 0 16px}
h3{letter-spacing:-.3px}
.sec-head p{color:var(--muted);font-size:1.03rem;margin:0}
.prose p{color:var(--muted);font-size:1.02rem}
.prose p+p{margin-top:16px}
.prose h3{font-size:1.15rem;font-weight:700;margin:34px 0 12px;color:var(--text)}
.prose ul{color:var(--muted);padding-left:20px}
.prose li{margin:7px 0}

/* ---------- products ---------- */
.products{display:grid;grid-template-columns:repeat(auto-fit,minmax(330px,1fr));gap:20px}
.product{
  position:relative;padding:32px 30px 30px;border:1px solid var(--border);border-radius:18px;
  background:linear-gradient(180deg,rgba(255,255,255,.055),rgba(255,255,255,.012));
  overflow:hidden;
  transition:transform .3s var(--ease),border-color .3s var(--ease),box-shadow .3s var(--ease);
}
.product::before{content:'';position:absolute;top:0;left:0;right:0;height:2px;background:var(--grad);opacity:.75}
.product:hover{transform:translateY(-4px);border-color:var(--border-strong);box-shadow:0 22px 52px rgba(0,0,0,.45)}
.prod-top{display:flex;align-items:center;gap:12px;flex-wrap:wrap;margin-bottom:18px}
.prod-name{
  display:inline-flex;align-items:center;padding:6px 14px;border-radius:9px;
  background:linear-gradient(140deg,rgba(34,211,238,.18),rgba(99,102,241,.18));
  border:1px solid var(--border-strong);font-size:15px;font-weight:700;letter-spacing:-.2px;
}
.prod-kind{font-size:11.5px;font-weight:600;letter-spacing:1.4px;text-transform:uppercase;color:var(--muted-2)}
.product h3{font-size:1.22rem;font-weight:700;margin:0 0 11px}
.product > p{margin:0 0 20px;color:var(--muted);font-size:.95rem}
.feature-list{list-style:none;margin:0;padding:0;display:grid;gap:9px}
.feature-list li{display:flex;gap:10px;align-items:flex-start;font-size:.92rem;color:var(--muted)}
.feature-list svg{width:15px;height:15px;color:var(--cyan);flex:0 0 auto;margin-top:4px}

/* ---------- cards ---------- */
.cards{display:grid;grid-template-columns:repeat(auto-fit,minmax(258px,1fr));gap:18px}
.card{
  position:relative;padding:30px 26px 28px;border:1px solid var(--border);border-radius:var(--radius);
  background:linear-gradient(180deg,rgba(255,255,255,.045),rgba(255,255,255,.012));
  overflow:hidden;
  transition:transform .3s var(--ease),border-color .3s var(--ease),box-shadow .3s var(--ease);
}
.card::after{
  content:'';position:absolute;inset:0;border-radius:inherit;pointer-events:none;
  background:radial-gradient(420px circle at var(--mx,50%) var(--my,0%),rgba(99,102,241,.14),transparent 62%);
  opacity:0;transition:opacity .35s var(--ease);
}
.card:hover{transform:translateY(-4px);border-color:var(--border-strong);box-shadow:0 20px 48px rgba(0,0,0,.42)}
.card:hover::after{opacity:1}
.card h3{font-size:1.06rem;font-weight:650;margin:0 0 9px}
.card p{margin:0;color:var(--muted);font-size:.94rem;line-height:1.6}
.ico{
  width:44px;height:44px;border-radius:12px;display:grid;place-items:center;margin-bottom:19px;
  background:linear-gradient(140deg,rgba(34,211,238,.16),rgba(99,102,241,.16));
  border:1px solid var(--border-strong);
}
.ico svg{width:21px;height:21px;color:var(--cyan)}

/* card co link "tim hieu them" */
.card-link{display:inline-flex;align-items:center;gap:7px;margin-top:16px;font-size:13.4px;font-weight:600;color:var(--cyan)}
.card-link svg{width:14px;height:14px;transition:transform .2s var(--ease)}
.card:hover .card-link svg{transform:translateX(3px)}

/* ---------- about split ---------- */
.split{display:grid;grid-template-columns:1.05fr .95fr;gap:56px;align-items:center}
.split.top{align-items:start}
.about-copy p{color:var(--muted);font-size:1.02rem}
.about-copy p+p{margin-top:16px}
.panel{
  border:1px solid var(--border);border-radius:var(--radius);
  background:linear-gradient(180deg,rgba(255,255,255,.05),rgba(255,255,255,.015));
  padding:26px;backdrop-filter:blur(6px);
}
.panel-title{font-size:12px;letter-spacing:1.8px;text-transform:uppercase;color:var(--muted-2);margin-bottom:18px;font-weight:600}
.kv{display:flex;gap:14px;padding:13px 0;border-top:1px solid var(--border);align-items:flex-start}
.kv:first-of-type{border-top:0;padding-top:0}
.kv svg{width:17px;height:17px;color:var(--cyan);flex:0 0 auto;margin-top:3px}
.kv div strong{display:block;font-size:.92rem;font-weight:600;margin-bottom:2px}
.kv div span{color:var(--muted);font-size:.87rem;line-height:1.5}

/* ---------- principles ---------- */
.principles{display:grid;grid-template-columns:repeat(auto-fit,minmax(240px,1fr));gap:0;border-top:1px solid var(--border)}
.principle{padding:30px 26px 30px 0;border-bottom:1px solid var(--border)}
.principle .num{font-size:12.5px;font-weight:700;letter-spacing:1.6px;color:var(--cyan);display:block;margin-bottom:13px}
.principle h3{font-size:1.03rem;font-weight:650;margin:0 0 9px}
.principle p{margin:0;color:var(--muted);font-size:.93rem}

/* ---------- steps (cach lam viec) ---------- */
.steps{counter-reset:step;display:grid;gap:0;border-top:1px solid var(--border)}
.step{display:grid;grid-template-columns:64px 1fr;gap:20px;padding:26px 0;border-bottom:1px solid var(--border)}
.step-num{
  width:44px;height:44px;border-radius:12px;display:grid;place-items:center;
  border:1px solid var(--border-strong);
  background:linear-gradient(140deg,rgba(34,211,238,.16),rgba(99,102,241,.16));
  font-weight:700;font-size:15px;color:var(--cyan);
}
.step h3{margin:6px 0 8px;font-size:1.05rem;font-weight:650}
.step p{margin:0;color:var(--muted);font-size:.95rem}

/* ---------- contact ---------- */
.contact{
  border:1px solid var(--border);border-radius:22px;
  background:linear-gradient(150deg,rgba(34,211,238,.09),rgba(99,102,241,.09) 55%,rgba(167,139,250,.06));
  padding:60px 46px;text-align:center;overflow:hidden;position:relative;
}
.contact h2{margin-bottom:14px}
.contact p{color:var(--muted);max-width:560px;margin:0 auto 30px}
.contact-lines{display:flex;gap:12px;justify-content:center;flex-wrap:wrap;margin-top:22px}
.chip{
  display:inline-flex;align-items:center;gap:9px;padding:10px 17px;border-radius:999px;
  border:1px solid var(--border-strong);background:rgba(7,11,20,.5);font-size:13.4px;color:var(--muted);
  transition:color .2s var(--ease),border-color .2s var(--ease)
}
.chip:hover{color:var(--text);border-color:var(--cyan)}
.chip svg{width:15px;height:15px;color:var(--cyan)}

/* ---------- contact form ---------- */
.form-grid{display:grid;grid-template-columns:1fr 1fr;gap:16px;max-width:720px;margin:0 auto;text-align:left}
.field{display:flex;flex-direction:column;gap:7px}
.field.full{grid-column:1 / -1}
.field label{font-size:12.5px;font-weight:600;letter-spacing:.4px;color:var(--muted)}
.field input,.field textarea{
  width:100%;padding:12px 14px;border-radius:10px;
  border:1px solid var(--border-strong);background:rgba(7,11,20,.55);
  color:var(--text);font:inherit;font-size:14.5px;
  transition:border-color .2s var(--ease),box-shadow .2s var(--ease);
}
.field input:focus,.field textarea:focus{outline:none;border-color:var(--cyan);box-shadow:0 0 0 3px rgba(34,211,238,.16)}
.field textarea{min-height:130px;resize:vertical}

/* ---------- info cards (contact page) ---------- */
.info-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(240px,1fr));gap:18px}
.info{
  border:1px solid var(--border);border-radius:var(--radius);padding:26px 24px;
  background:linear-gradient(180deg,rgba(255,255,255,.045),rgba(255,255,255,.012));
}
.info h3{margin:0 0 8px;font-size:1rem;font-weight:650}
.info p{margin:0;color:var(--muted);font-size:.93rem}
.info a{color:var(--cyan)}
.info a:hover{text-decoration:underline}

/* ---------- CTA band ---------- */
.cta-band{
  border:1px solid var(--border);border-radius:20px;padding:44px 40px;text-align:center;
  background:linear-gradient(150deg,rgba(34,211,238,.08),rgba(99,102,241,.08));
}
.cta-band h2{margin-bottom:12px}
.cta-band p{color:var(--muted);max-width:520px;margin:0 auto 26px}

/* ---------- footer ---------- */
footer{position:relative;z-index:1;border-top:1px solid var(--border);margin-top:86px;padding:42px 0 34px}
.foot{display:flex;justify-content:space-between;gap:26px;flex-wrap:wrap;align-items:flex-start}
.foot-left{max-width:460px}
.foot-left p{color:var(--muted-2);font-size:.87rem;margin:14px 0 0}
.legal{margin-top:12px;color:var(--muted-2);font-size:.8rem;line-height:1.7}
.legal b{color:var(--muted);font-weight:600}
.foot-links{display:flex;gap:26px;flex-wrap:wrap}
.foot-links a{color:var(--muted);font-size:.89rem;transition:color .2s var(--ease)}
.foot-links a:hover{color:var(--text)}
.foot-bottom{
  margin-top:32px;padding-top:22px;border-top:1px solid var(--border);
  display:flex;justify-content:space-between;gap:16px;flex-wrap:wrap;
  color:var(--muted-2);font-size:.82rem;
}

/* ---------- reveal ---------- */
.js .reveal{opacity:0;transform:translateY(22px);transition:opacity .7s var(--ease),transform .7s var(--ease)}
.js .reveal.in{opacity:1;transform:none}

/* ---------- responsive ---------- */
@media (max-width:900px){
  .split{grid-template-columns:1fr;gap:34px}
  .principle{padding-right:0}
  .step{grid-template-columns:52px 1fr;gap:14px}
}
@media (max-width:760px){
  .nav-links{
    position:absolute;top:72px;left:0;right:0;flex-direction:column;align-items:stretch;gap:4px;
    background:rgba(9,14,25,.98);border-bottom:1px solid var(--border);
    padding:14px 24px 22px;display:none;
  }
  .nav-links.open{display:flex}
  .nav-links a{padding:12px 14px}
  .burger{display:inline-flex}
  .nav-cta{display:none}
  .hero{padding:70px 0 56px}
  .sec{padding:64px 0}
  .page-hero{padding:52px 0 40px}
  .contact{padding:44px 24px}
  .cta-band{padding:34px 24px}
  .badges{padding-bottom:60px}
  .form-grid{grid-template-columns:1fr}
}

@media (prefers-reduced-motion:reduce){
  html{scroll-behavior:auto}
  .js .reveal{opacity:1;transform:none;transition:none}
  *{animation:none!important;transition:none!important}
}