:root{
  --bg:#0B0E13;           /* nền tối kiểu moonshot */
  --bg-soft:#11151C;
  --panel:#141922;
  --text:#EAEEF3;
  --muted:rgba(234,238,243,.62);
  --faint:rgba(234,238,243,.38);
  --line:rgba(234,238,243,.09);
  --amber:#F08A24;
  --amber-soft:rgba(240,138,36,.12);
  --blue:#4C9AF0;
  --blue-soft:rgba(76,154,240,.12);
  --solid-bg:#EAEEF3;     /* nút tương phản cao — đảo màu theo theme */
  --solid-fg:#0B0E13;
  --solid-bg-hover:#ffffff;
  --radius:18px;
  --display:'Space Grotesk',sans-serif;
  --body:'Be Vietnam Pro',sans-serif;
  --mono:'IBM Plex Mono',monospace;
  color-scheme:dark;
}

*{margin:0;padding:0;box-sizing:border-box}
html{scroll-behavior:smooth}
body{font-family:var(--body);background:var(--bg);color:var(--text);line-height:1.7;font-size:16px;-webkit-font-smoothing:antialiased;transition:background-color .3s ease,color .3s ease}
img,video{max-width:100%;display:block}
a{color:inherit;text-decoration:none}
:focus-visible{outline:2px solid var(--amber);outline-offset:3px;border-radius:4px}
.wrap{max-width:1160px;margin:0 auto;padding:0 28px}
h1,h2,h3{font-family:var(--display);letter-spacing:-.02em;line-height:1.12;font-weight:600}
h2{font-size:clamp(1.9rem,3.8vw,2.9rem)}
.section{padding:120px 0}
.eyebrow{font-family:var(--mono);font-size:.76rem;letter-spacing:.18em;text-transform:uppercase;color:var(--faint)}
.muted{color:var(--muted)}

/* ---------- NAV ---------- */
.nav{position:fixed;inset:0 0 auto 0;z-index:60;padding:20px 0;transition:background .3s,box-shadow .3s}
.nav.solid{background:rgba(11,14,19,.82);backdrop-filter:blur(14px);box-shadow:0 1px 0 var(--line)}
.nav .wrap{display:flex;align-items:center;justify-content:space-between}
.logo{font-family:var(--display);font-weight:700;font-size:1.18rem;letter-spacing:.03em;display:flex;align-items:center;gap:9px}
.nav-links{display:flex;gap:34px;align-items:center;font-size:.93rem}
.nav-links a:not(.btn){color:var(--muted);font-weight:600;transition:color .2s}
.nav-links a:not(.btn):hover,.nav-links a.active{color:var(--text)}
/* uốn lượn: mỗi ký tự nhấp nhô lệch pha → sóng chạy 1 lần khi hover */
.nav-links a.wavy span{display:inline-block;transition:color .2s}
.nav-links a.wavy:hover span{animation:navWave 1s ease both;animation-delay:calc(var(--i,0)*60ms)}
@keyframes navWave{40%{transform:translateY(-2px)}70%{transform:translateY(.5px)}100%{transform:translateY(0)}}
@media (prefers-reduced-motion:reduce){.nav-links a.wavy:hover span{animation:none}}
.btn{display:inline-flex;align-items:center;gap:10px;font-weight:600;font-size:.95rem;padding:14px 28px;border-radius:100px;border:0;cursor:pointer;font-family:var(--body);transition:transform .16s,background .2s,border-color .2s}
.btn:hover{transform:translateY(-2px)}
.btn svg{transition:transform .2s}
.btn:hover svg{transform:translateX(3px)}
.btn-light{background:var(--solid-bg);color:var(--solid-fg)}
.btn-light:hover{background:var(--solid-bg-hover)}
.btn-outline{background:transparent;color:var(--text);border:1px solid rgba(234,238,243,.28)}
.btn-outline:hover{border-color:rgba(234,238,243,.6)}
.btn-amber{background:var(--amber);color:#14100A}
.btn-amber:hover{background:#FF9A38}
.btn-blue{background:var(--blue);color:#0A1420}
.btn-blue:hover{background:#63AAF6}
.nav .btn{padding:10px 22px;font-size:.87rem}
.nav-toggle{display:none}

/* ---------- FOOTER (kiểu moonshot: nhiều cột) ---------- */
footer{border-top:1px solid var(--line);padding:72px 0 44px;font-size:.9rem}
.foot-grid{display:grid;grid-template-columns:1.5fr 1fr 1fr 1fr;gap:44px}
.foot-grid h4{font-family:var(--mono);font-size:.74rem;letter-spacing:.16em;text-transform:uppercase;color:var(--faint);margin-bottom:18px;font-weight:500}
.foot-grid ul{list-style:none;display:grid;gap:11px}
.foot-grid a{color:var(--muted)}
.foot-grid a:hover{color:var(--text)}
.foot-brand p{color:var(--faint);margin-top:14px;max-width:300px;line-height:1.65}
.foot-bottom{margin-top:56px;padding-top:26px;border-top:1px solid var(--line);display:flex;justify-content:space-between;gap:16px;flex-wrap:wrap;color:var(--faint);font-size:.82rem}

/* ---------- REVEAL ---------- */
.reveal{opacity:0;transform:translateY(26px);transition:opacity .8s ease,transform .8s ease}
.reveal.in{opacity:1;transform:none}
@media (prefers-reduced-motion:reduce){
  *,*::before,*::after{animation:none!important;transition:none!important}
  .reveal{opacity:1;transform:none}
  html{scroll-behavior:auto}
}

/* ================= TRANG CHỦ ================= */
.hero{position:relative;min-height:100svh;display:grid;place-items:center;text-align:center;overflow:hidden;background:radial-gradient(130% 120% at 50% 24%,#111a29 0%,#0B0E13 60%)}
.hero-canvas{position:absolute;inset:0;width:100%;height:100%}
.hero::after{content:"";position:absolute;inset:0;background:radial-gradient(ellipse at center,rgba(11,14,19,.15) 0%,rgba(11,14,19,.78) 78%,var(--bg) 100%)}
.hero .wrap{position:relative;z-index:2;padding-top:80px}
.hero h1{font-size:clamp(2.5rem,6.4vw,4.8rem);font-weight:600;max-width:900px;margin:0 auto}
.hero p{margin:26px auto 0;max-width:520px;color:var(--muted);font-size:1.08rem}
.hero p .chip{display:inline-block;margin-top:10px;padding:3px 14px;border-radius:100px;background:rgba(17,21,28,.55);backdrop-filter:blur(6px);-webkit-backdrop-filter:blur(6px);border:1px solid rgba(234,238,243,.09);color:var(--muted);font-weight:600}
.hero-cta{display:flex;gap:14px;justify-content:center;margin-top:44px;flex-wrap:wrap}
.hero-scroll{position:absolute;bottom:34px;left:50%;transform:translateX(-50%);z-index:2;color:var(--faint)}
.hero-scroll svg{animation:bob 2s infinite}
@keyframes bob{0%,100%{transform:translateY(0)}50%{transform:translateY(7px)}}

/* Tin tức — card kiểu "Latest Research" của moonshot */
.news-head{display:flex;justify-content:space-between;align-items:end;gap:24px;margin-bottom:48px;flex-wrap:wrap}
.news-head p{max-width:520px;color:var(--muted);margin-top:14px}
.news-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:20px}
.news-card{background:var(--panel);border:1px solid var(--line);border-radius:var(--radius);padding:30px 28px;min-height:230px;display:flex;flex-direction:column;justify-content:space-between;transition:transform .25s,border-color .25s;position:relative;overflow:hidden}
.news-card::after{content:"→";position:absolute;right:26px;bottom:22px;color:var(--faint);font-size:1.2rem;transition:transform .25s,color .25s}
.news-card:hover{transform:translateY(-5px);border-color:rgba(234,238,243,.22)}
.news-card:hover::after{transform:translateX(5px);color:var(--text)}
.news-card time{font-family:var(--mono);font-size:.76rem;color:var(--faint);letter-spacing:.08em}
.news-card h3{font-size:1.22rem;margin-top:10px}
.news-card p{color:var(--muted);font-size:.92rem;margin-top:10px}

/* Product teaser lớn */
.teaser{background:linear-gradient(180deg,var(--bg) 0%,var(--bg-soft) 100%)}
.teaser-panel{border:1px solid var(--line);border-radius:26px;padding:clamp(40px,6vw,80px);background:
  radial-gradient(600px 300px at 12% 0%,var(--amber-soft),transparent 70%),
  radial-gradient(600px 300px at 88% 100%,var(--blue-soft),transparent 70%),var(--panel);
  display:grid;grid-template-columns:1.1fr .9fr;gap:56px;align-items:center}
.teaser-panel h2{margin-top:16px}
.teaser-panel .lead{color:var(--muted);margin-top:18px;max-width:480px}
.teaser-list{display:grid;gap:0}
.teaser-item{display:flex;gap:18px;padding:20px 0;border-bottom:1px solid var(--line);align-items:flex-start}
.teaser-item:last-child{border-bottom:0}
.teaser-item .dot{width:9px;height:9px;border-radius:50%;margin-top:9px;flex:none}
.dot-a{background:var(--amber);box-shadow:0 0 10px var(--amber)}
.dot-b{background:var(--blue);box-shadow:0 0 10px var(--blue)}
.teaser-item b{font-family:var(--display);font-weight:600;font-size:1.02rem}
.teaser-item span{display:block;color:var(--muted);font-size:.9rem;margin-top:3px}

/* CTA cuối trang chủ */
.big-cta{text-align:center;padding:150px 0;position:relative;overflow:hidden}
.big-cta::before{content:"";position:absolute;left:50%;top:0;transform:translateX(-50%);width:760px;height:760px;border-radius:50%;background:radial-gradient(circle,rgba(240,138,36,.13),rgba(76,154,240,.08) 45%,transparent 70%);pointer-events:none}
.big-cta h2{font-size:clamp(2rem,4.6vw,3.4rem);position:relative}
.big-cta p{color:var(--muted);max-width:480px;margin:20px auto 40px;position:relative}

/* Đối tác */
.partners{text-align:center;padding:56px 0;border-top:1px solid var(--line);border-bottom:1px solid var(--line)}
.partners .eyebrow{display:block;margin-bottom:22px}
.partners-grid{display:flex;flex-wrap:wrap;justify-content:center;gap:20px}
.partner-logo{display:grid;place-items:center;background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:clamp(30px,3.5vw,40px) clamp(40px,5vw,64px);width:auto;transition:transform .25s,box-shadow .25s}
.partner-logo:hover{transform:translateY(-4px);box-shadow:0 12px 32px rgba(0,0,0,.4)}
.partner-logo img{height:clamp(44px,5vw,56px);width:auto}

/* ================= TRANG SẢN PHẨM ================= */
.page-hero{padding:190px 0 90px;text-align:center;position:relative;overflow:hidden}
.page-hero::before{content:"";position:absolute;left:50%;top:-320px;transform:translateX(-50%);width:900px;height:640px;border-radius:50%;background:radial-gradient(circle,rgba(240,138,36,.1),rgba(76,154,240,.07) 50%,transparent 72%)}
.page-hero h1{font-size:clamp(2.4rem,5.6vw,4rem);position:relative}
.page-hero p{color:var(--muted);max-width:560px;margin:22px auto 0;position:relative}
.domain-band{font-family:var(--mono);font-size:.78rem;letter-spacing:.2em;text-transform:uppercase;display:inline-flex;align-items:center;gap:12px;padding:9px 20px;border:1px solid var(--line);border-radius:100px;margin-bottom:26px}
.domain-band .dot{width:8px;height:8px;border-radius:50%}

/* Khối sản phẩm lớn — xen kẽ như moonshot */
.product{padding:96px 0;border-top:1px solid var(--line)}
.product .grid{display:grid;grid-template-columns:1fr 1fr;gap:70px;align-items:center}
.product.flip .grid > .p-visual{order:2}
.p-info .k{font-family:var(--mono);font-size:.76rem;letter-spacing:.16em;text-transform:uppercase}
.p-info h2{margin-top:14px;font-size:clamp(1.7rem,3.2vw,2.4rem)}
.p-info .desc{color:var(--muted);margin-top:18px}
.p-feats{margin-top:26px;display:grid;gap:13px;list-style:none}
.p-feats li{display:flex;gap:12px;color:var(--muted);font-size:.94rem}
.p-feats svg{flex:none;margin-top:4px}
.p-info .btn{margin-top:34px}
.ind .k{color:var(--amber)}
.edu .k{color:var(--blue)}
.p-visual{--panel:#141922;--line:rgba(234,238,243,.09);border-radius:22px;border:1px solid var(--line);aspect-ratio:5/4;position:relative;overflow:hidden;background:var(--panel)}
.ind .p-visual{background:radial-gradient(420px 300px at 30% 20%,var(--amber-soft),transparent 70%),var(--panel)}
.edu .p-visual{background:radial-gradient(420px 300px at 70% 20%,var(--blue-soft),transparent 70%),var(--panel)}
.p-visual svg{position:absolute;inset:0;width:100%;height:100%}

/* ---------- RESPONSIVE ---------- */
@media (max-width:960px){
  .news-grid{grid-template-columns:1fr}
  .teaser-panel{grid-template-columns:1fr;gap:40px}
  .product .grid{grid-template-columns:1fr;gap:40px}
  .product.flip .grid > .p-visual{order:0}
  .foot-grid{grid-template-columns:1fr 1fr}
}
@media (max-width:680px){
  .nav-links{display:none}
  .nav-toggle{display:block;background:none;border:0;cursor:pointer;color:var(--text)}
  .nav.open .nav-links{display:flex;position:absolute;top:100%;left:0;right:0;background:var(--bg-soft);border-bottom:1px solid var(--line);flex-direction:column;align-items:flex-start;padding:24px 28px;gap:18px}
  .section{padding:84px 0}
  .page-hero{padding:150px 0 64px}
  .product{padding:70px 0}
  .foot-grid{grid-template-columns:1fr}
}