:root {
  --primary: #3c78be;
  --primary-hover: #2b5f9e;
  --primary-glow: rgba(60, 120, 190, 0.2);
  --primary-soft: #eef4fb;
  --text-primary: #0f172a;
  --text-secondary: #475569;
  --text-muted: #64748b;
  --bg: #ffffff;
  --bg-alt: #f8fafc;
  --border-color: #e2e8f0;
  --radius: 14px;
  --font: 'Be Vietnam Pro', system-ui, -apple-system, 'Segoe UI', Roboto, sans-serif;
  --font-head: 'Outfit', 'Be Vietnam Pro', sans-serif;
}

* { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
body { font-family: var(--font); color: var(--text-primary); background: var(--bg); line-height: 1.65; -webkit-font-smoothing: antialiased; }
img { max-width: 100%; display: block; }
a { color: inherit; text-decoration: none; }
.container { width: 100%; max-width: 1160px; margin: 0 auto; padding: 0 20px; }

/* Header */
.header { position: sticky; top: 0; z-index: 50; background: rgba(255,255,255,.92); backdrop-filter: blur(10px); border-bottom: 1.5px solid var(--border-color); }
.header .container { display: flex; align-items: center; justify-content: space-between; height: 72px; gap: 16px; }
.logo { display: flex; align-items: center; gap: 10px; }
.logo img { width: 44px; height: 44px; border-radius: 50%; }
.logo-text { font-family: var(--font-head); font-weight: 700; font-size: 1.2rem; letter-spacing: .02em; white-space: nowrap; }
.logo-text span { color: var(--primary); font-weight: 600; }
.nav { display: flex; gap: 4px; }
.nav a { padding: 8px 12px; border-radius: 8px; font-size: .95rem; font-weight: 500; color: var(--text-secondary); transition: color .2s, background .2s; }
.nav a:hover { color: var(--primary-hover); background: var(--primary-soft); }
.nav a.active { color: var(--primary-hover); font-weight: 600; }
.nav-toggle { display: none; background: none; border: 0; width: 44px; height: 44px; cursor: pointer; color: var(--text-primary); }
.nav-toggle svg { width: 26px; height: 26px; }

/* Buttons */
.btn { display: inline-flex; align-items: center; gap: 8px; padding: 12px 22px; border-radius: 10px; font-weight: 600; font-size: .98rem; border: 1.5px solid transparent; cursor: pointer; transition: background .2s, transform .2s, border-color .2s; }
.btn-primary { background: var(--primary); color: #fff; }
.btn-primary:hover { background: var(--primary-hover); transform: translateY(-1px); }
.btn-outline { border-color: var(--border-color); color: var(--text-primary); background: #fff; }
.btn-outline:hover { border-color: var(--primary); color: var(--primary-hover); }

/* Hero */
.hero { padding: 96px 0 80px; background: radial-gradient(1100px 480px at 85% -10%, var(--primary-glow), transparent 60%), linear-gradient(180deg, var(--bg-alt), #fff); }
.hero-grid { display: grid; grid-template-columns: 1.3fr 1fr; gap: 48px; align-items: center; }
.eyebrow { display: inline-block; font-size: .82rem; font-weight: 600; letter-spacing: .08em; text-transform: uppercase; color: var(--primary-hover); background: var(--primary-soft); padding: 6px 12px; border-radius: 999px; margin-bottom: 18px; }
.hero h1 { font-family: var(--font-head); font-size: clamp(2rem, 4.6vw, 3.25rem); line-height: 1.15; font-weight: 700; margin-bottom: 18px; }
.hero h1 em { font-style: normal; color: var(--primary); }
.hero p.lead { font-size: 1.12rem; color: var(--text-secondary); max-width: 560px; margin-bottom: 28px; }
.hero-actions { display: flex; flex-wrap: wrap; gap: 12px; }
.hero-logo { justify-self: center; width: min(320px, 80%); aspect-ratio: 1; border-radius: 50%; background: #fff; box-shadow: 0 30px 80px -20px var(--primary-glow), 0 0 0 12px rgba(60,120,190,.06); display: grid; place-items: center; }
.hero-logo img { width: 78%; }

/* Page header */
.page-head { padding: 64px 0 40px; background: linear-gradient(180deg, var(--bg-alt), #fff); border-bottom: 1px solid var(--border-color); }
.page-head h1 { font-family: var(--font-head); font-size: clamp(1.8rem, 3.6vw, 2.5rem); line-height: 1.2; margin-bottom: 10px; }
.page-head p { color: var(--text-secondary); max-width: 720px; font-size: 1.05rem; }
.breadcrumb { font-size: .85rem; color: var(--text-muted); margin-bottom: 12px; }
.breadcrumb a:hover { color: var(--primary-hover); }

/* Sections */
.section { padding: 72px 0; }
.section-alt { background: var(--bg-alt); }
.section-title { text-align: center; margin-bottom: 44px; }
.section-title h2 { font-family: var(--font-head); font-size: clamp(1.6rem, 3vw, 2.1rem); margin-bottom: 10px; }
.section-title p { color: var(--text-secondary); max-width: 640px; margin: 0 auto; }

.grid { display: grid; gap: 22px; }
.grid-2 { grid-template-columns: repeat(2, 1fr); }
.grid-3 { grid-template-columns: repeat(3, 1fr); }
.grid-4 { grid-template-columns: repeat(4, 1fr); }

.card { background: #fff; border: 1.5px solid var(--border-color); border-radius: var(--radius); padding: 26px; transition: border-color .2s, transform .2s, box-shadow .2s; }
a.card:hover, .card.hover:hover { border-color: var(--primary); transform: translateY(-3px); box-shadow: 0 16px 40px -18px var(--primary-glow); }
.card .icon { width: 48px; height: 48px; border-radius: 12px; background: var(--primary-soft); color: var(--primary-hover); display: grid; place-items: center; margin-bottom: 16px; }
.card .icon svg { width: 26px; height: 26px; }
.card h3 { font-size: 1.12rem; margin-bottom: 8px; }
.card p { color: var(--text-secondary); font-size: .96rem; }
.card ul { margin-top: 10px; padding-left: 18px; color: var(--text-secondary); font-size: .95rem; }
.card .more { display: inline-block; margin-top: 12px; color: var(--primary-hover); font-weight: 600; font-size: .92rem; }

.prose { max-width: 820px; }
.prose p { color: var(--text-secondary); margin-bottom: 14px; font-size: 1.03rem; }
.prose h2 { font-family: var(--font-head); font-size: 1.45rem; margin: 28px 0 12px; }

.info-table { width: 100%; border-collapse: collapse; background: #fff; border: 1.5px solid var(--border-color); border-radius: var(--radius); overflow: hidden; }
.info-table th, .info-table td { text-align: left; padding: 14px 18px; border-bottom: 1px solid var(--border-color); vertical-align: top; }
.info-table th { width: 34%; color: var(--text-muted); font-weight: 500; background: var(--bg-alt); }
.info-table tr:last-child th, .info-table tr:last-child td { border-bottom: 0; }

.notice { border: 1.5px dashed var(--primary); background: var(--primary-soft); color: var(--text-secondary); border-radius: var(--radius); padding: 22px 24px; }
.notice strong { color: var(--text-primary); }

.cta { background: linear-gradient(135deg, #1e3a64, #2b5f9e); color: #fff; border-radius: 20px; padding: 44px; display: flex; align-items: center; justify-content: space-between; gap: 24px; flex-wrap: wrap; }
.cta h2 { font-family: var(--font-head); font-size: 1.7rem; margin-bottom: 6px; }
.cta p { color: #dbe8f7; }
.cta .btn-primary { background: #fff; color: #1e3a64; }
.cta .btn-primary:hover { background: #eef4fb; }

.contact-item { display: flex; gap: 16px; align-items: flex-start; }
.contact-item .icon { flex: none; margin-bottom: 0; }
.contact-item h3 { font-size: 1.02rem; margin-bottom: 2px; }
.contact-item a { color: var(--primary-hover); font-weight: 600; }

/* Footer */
.footer { background: #0b1220; color: #cbd5e1; padding: 60px 0 0; margin-top: 0; }
.footer-grid { display: grid; grid-template-columns: 1.5fr 1fr 1.2fr; gap: 40px; padding-bottom: 40px; }
.footer .logo-text { color: #fff; }
.footer p, .footer li { font-size: .9rem; color: #94a3b8; line-height: 1.7; }
.footer h4 { color: #fff; font-size: 1rem; margin-bottom: 14px; }
.footer ul { list-style: none; }
.footer a:hover { color: var(--primary); }
.footer-company { margin-top: 14px; }
.footer-bottom { border-top: 1px solid #1e293b; padding: 20px 0; font-size: .85rem; color: #64748b; }

/* Floating Zalo */
.zalo-float { position: fixed; right: 20px; bottom: 20px; z-index: 999; width: 56px; height: 56px; border-radius: 50%; background: var(--primary); display: flex; align-items: center; justify-content: center; box-shadow: 0 6px 18px rgba(60,120,190,.45); transition: transform .2s, background-color .2s; animation: zalo-pulse 2.4s infinite; }
.zalo-float:hover { background: var(--primary-hover); transform: scale(1.08); }
.zalo-float svg { width: 36px; height: 36px; }
@keyframes zalo-pulse { 0% { box-shadow: 0 0 0 0 rgba(60,120,190,.55), 0 6px 18px rgba(60,120,190,.45); } 70% { box-shadow: 0 0 0 16px rgba(60,120,190,0), 0 6px 18px rgba(60,120,190,.45); } 100% { box-shadow: 0 0 0 0 rgba(60,120,190,0), 0 6px 18px rgba(60,120,190,.45); } }

@media (prefers-reduced-motion: reduce) { .zalo-float { animation: none; } html { scroll-behavior: auto; } }

@media (max-width: 960px) {
  .grid-4 { grid-template-columns: repeat(2, 1fr); }
  .grid-3 { grid-template-columns: repeat(2, 1fr); }
  .hero-grid { grid-template-columns: 1fr; }
  .hero-logo { width: 220px; }
  .footer-grid { grid-template-columns: 1fr 1fr; }
  .footer-grid > :first-child { grid-column: 1 / -1; }
  .nav-toggle { display: grid; place-items: center; }
  .nav { display: none; position: absolute; top: 72px; left: 0; right: 0; background: #fff; border-bottom: 1.5px solid var(--border-color); flex-direction: column; padding: 8px 16px 16px; }
  .nav.open { display: flex; }
  .nav a { padding: 12px; }
}
@media (max-width: 640px) {
  .container { padding: 0 16px; }
  .grid-2, .grid-3, .grid-4 { grid-template-columns: 1fr; }
  .hero { padding: 56px 0 48px; }
  .section { padding: 52px 0; }
  .footer-grid { grid-template-columns: 1fr; }
  .cta { padding: 30px 22px; }
  .info-table th { width: 40%; }
  .zalo-float { right: 14px; bottom: 14px; width: 50px; height: 50px; }
  .zalo-float svg { width: 32px; height: 32px; }
}

/* Gallery */
.cat-nav { display: flex; flex-wrap: wrap; gap: 8px; justify-content: center; margin-bottom: 36px; }
.cat-nav a { padding: 8px 16px; border-radius: 999px; border: 1.5px solid var(--border-color); font-size: .92rem; font-weight: 500; color: var(--text-secondary); background: #fff; }
.cat-nav a:hover { border-color: var(--primary); color: var(--primary-hover); }
.cat { scroll-margin-top: 90px; margin-bottom: 56px; }
.cat h2 { font-family: var(--font-head); font-size: 1.5rem; margin-bottom: 6px; }
.cat > p { color: var(--text-secondary); margin-bottom: 20px; }
.gallery { display: grid; grid-template-columns: repeat(auto-fill, minmax(220px, 1fr)); gap: 16px; }
.gallery figure { margin: 0; background: #fff; border: 1.5px solid var(--border-color); border-radius: var(--radius); overflow: hidden; transition: border-color .2s, transform .2s; }
.gallery figure:hover { border-color: var(--primary); transform: translateY(-2px); }
.gallery a { display: block; aspect-ratio: 4 / 3; background: var(--bg-alt); }
.gallery img { width: 100%; height: 100%; object-fit: cover; }
.gallery figcaption { padding: 10px 14px; font-size: .92rem; font-weight: 500; }
.chips { display: flex; flex-wrap: wrap; gap: 8px; margin-top: 12px; }
.chips span { background: var(--primary-soft); color: var(--primary-hover); border-radius: 8px; padding: 6px 10px; font-size: .88rem; font-weight: 600; }
.stat { text-align: center; }
.stat b { display: block; font-family: var(--font-head); font-size: 2.2rem; color: var(--primary); line-height: 1.1; }
.stat span { color: var(--text-secondary); font-size: .95rem; }
.photo-wide { border-radius: var(--radius); overflow: hidden; border: 1.5px solid var(--border-color); }
.photo-wide img { width: 100%; aspect-ratio: 4 / 3; object-fit: cover; }
.quote { font-family: var(--font-head); font-size: 1.35rem; color: var(--primary-hover); border-left: 4px solid var(--primary); padding: 6px 0 6px 18px; margin: 18px 0; }