:root{
  --black:#0a0a09;--ink:#151513;--muted:#77756e;--line:#dedbd2;
  --paper:#f7f5ef;--gold:#c8a24a;--gold2:#ead38a;--green:#173a32;--max:1000px;
  --ease-slow:cubic-bezier(.16,1,.3,1);
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{margin:0;font-family:Inter,system-ui,sans-serif;background:var(--paper);color:var(--ink);line-height:1.6}
a{color:inherit;text-decoration:none}
.container{width:min(var(--max),calc(100% - 40px));margin:auto}

.site-topnav{background:var(--black);border-bottom:1px solid #222;position:sticky;top:0;z-index:50}
.site-topnav .inner{display:flex;flex-wrap:wrap;align-items:center;justify-content:center;gap:8px;padding:10px 16px}
.site-topnav a{font-size:10px;letter-spacing:.14em;text-transform:uppercase;color:#bdb9b0;padding:8px 14px;border:1px solid transparent;border-radius:999px;transition:color .3s,border-color .3s,background .3s}
.site-topnav a:hover,.site-topnav a.active{color:var(--gold2);border-color:rgba(200,162,74,.45);background:rgba(200,162,74,.08)}

.page-header{background:var(--black);color:#fff;padding:56px 0 48px}
.page-header .eyebrow{font-size:10px;letter-spacing:.25em;text-transform:uppercase;color:var(--gold);margin-bottom:12px}
.page-header h1{margin:0;font-size:clamp(30px,4vw,52px);font-weight:600;letter-spacing:-.03em}

.about-section{padding:60px 0 40px}
.about-section h2{font-size:clamp(24px,3vw,36px);margin:0 0 20px;font-weight:600}
.about-body{font-size:17px;color:#5e5c56;line-height:1.85;max-width:720px}
.about-body p{margin:0 0 1em}
.about-body ul{padding-left:1.2em}

.contact-block{
  background:var(--green);color:#fff;padding:56px 0;margin-top:20px;
}
.contact-block h2{margin:0 0 18px;font-size:clamp(24px,3vw,36px)}
.contact-grid{display:grid;grid-template-columns:1fr 1fr;gap:28px}
.contact-card{
  background:rgba(0,0,0,.2);border:1px solid rgba(255,255,255,.12);border-radius:12px;padding:24px;
}
.contact-card h3{margin:0 0 10px;font-size:12px;letter-spacing:.16em;text-transform:uppercase;color:var(--gold2)}
.contact-card p,.contact-card a{color:#c5cec9;font-size:15px;display:block;margin:6px 0}
.contact-card a:hover{color:#fff}
.contact-actions{display:flex;flex-wrap:wrap;gap:10px;margin-top:22px}
.btn{
  padding:12px 18px;border:1px solid rgba(255,255,255,.4);font-size:11px;letter-spacing:.12em;
  text-transform:uppercase;color:#fff;transition:background .3s,border-color .3s,transform .3s;
}
.btn:hover{transform:translateY(-2px)}
.btn.gold{background:var(--gold);border-color:var(--gold);color:#111}
.btn.zalo{background:#0068ff;border-color:#0068ff}
.btn.fb{background:#1877f2;border-color:#1877f2}

.site-footer{background:#050505;color:#666;padding:28px 0;font-size:11px;text-align:center}
.site-footer a{color:#999;margin:0 8px}
.reveal{opacity:0;transform:translateY(20px);transition:opacity 1s var(--ease-slow),transform 1s var(--ease-slow)}
.reveal.visible{opacity:1;transform:none}

@media(max-width:700px){
  .contact-grid{grid-template-columns:1fr}
}