*, *::before, *::after { margin: 0; padding: 0; box-sizing: border-box; }
:root {
    --gold: #facc15; --gold-glow: rgba(250, 204, 21, 0.6);
    --primary: #818cf8; --primary-glow: rgba(129, 140, 248, 0.4);
    --bg: #1a1e2e; --bg-grad: radial-gradient(circle at 50% -20%, #3e4471 0%, #1a1e2e 85%);
    --card: rgba(255, 255, 255, 0.06); --card-border: rgba(255, 255, 255, 0.12);
    --text: #ffffff; --muted: rgba(255, 255, 255, 0.7);
}
html { scroll-behavior: smooth; }
body { font-family: 'Inter', 'Noto Sans KR', 'Noto Sans JP', 'Noto Sans SC', 'Noto Sans Thai', 'Noto Sans Lao', 'Noto Sans Arabic', sans-serif; background: var(--bg); background-image: var(--bg-grad); color: var(--text); min-height: 100vh; overflow-x: hidden; -webkit-font-smoothing: antialiased; }
.glow-bg { position: fixed; inset: 0; background: radial-gradient(circle at 15% 15%, rgba(129, 140, 248, 0.2) 0%, transparent 40%), radial-gradient(circle at 85% 85%, rgba(250, 204, 21, 0.15) 0%, transparent 40%); pointer-events: none; z-index: 0; }
nav { position: fixed; top: 0; left: 0; right: 0; z-index: 100; display: flex; align-items: center; justify-content: space-between; padding: 0.75rem 2rem; background: rgba(26, 30, 46, 0.75); backdrop-filter: blur(24px); border-bottom: 1px solid var(--card-border); }
.nav-logo { display: flex; align-items: center; gap: 0.75rem; font-weight: 900; font-size: 1.15rem; letter-spacing: -1px; color: var(--gold); text-decoration: none; text-transform: uppercase; }
.nav-logo img { width: 28px; height: 28px; border-radius: 6px; filter: drop-shadow(0 0 10px var(--gold-glow)); }
.dropdown { position: relative; }
.dropdown-trigger { display: flex; align-items: center; gap: 0.6rem; background: rgba(255, 255, 255, 0.1); border: 1px solid var(--card-border); padding: 0.4rem 0.8rem; border-radius: 0.75rem; cursor: pointer; transition: 0.3s; font-weight: 700; font-size: 0.8rem; }
.dropdown-trigger:hover { background: rgba(255, 255, 255, 0.2); border-color: var(--gold); }
.flag-icon { width: 18px; height: 12px; object-fit: cover; border-radius: 2px; box-shadow: 0 1px 3px rgba(0,0,0,0.3); vertical-align: middle; }
.dropdown-menu { position: absolute; top: calc(100% + 0.5rem); right: 0; width: 220px; max-height: 400px; background: #252b45; border: 1px solid var(--card-border); border-radius: 1rem; box-shadow: 0 25px 50px rgba(0,0,0,0.5); overflow-y: auto; opacity: 0; visibility: hidden; transform: translateY(10px); transition: 0.3s; z-index: 1000; padding: 0.5rem; }
.dropdown.open .dropdown-menu { opacity: 1; visibility: visible; transform: translateY(0); }
.dropdown-item { display: flex; align-items: center; gap: 0.75rem; padding: 0.7rem 1rem; border-radius: 0.75rem; cursor: pointer; transition: 0.2s; font-size: 0.85rem; }
.dropdown-item:hover { background: rgba(255, 255, 255, 0.08); }
.dropdown-item.active { background: rgba(250, 204, 21, 0.2); color: var(--gold); }
.first-screen { min-height: 100vh; display: flex; flex-direction: column; justify-content: center; align-items: center; padding: 4rem 1.5rem 2rem; position: relative; z-index: 1; }
.hero { text-align: center; max-width: 1100px; margin: 0 auto; }
.hero-badge { display: inline-flex; align-items: center; gap: 0.6rem; background: rgba(129, 140, 248, 0.2); border: 1px solid rgba(129, 140, 248, 0.4); color: #c7d2fe; font-size: 0.7rem; font-weight: 800; padding: 0.4rem 1rem; border-radius: 3rem; margin-bottom: 1.5rem; text-transform: uppercase; letter-spacing: 2px; }
.pulse-dot { width: 7px; height: 7px; background: var(--gold); border-radius: 50%; box-shadow: 0 0 10px var(--gold-glow); animation: pulse 2s infinite; }
@keyframes pulse { 0%, 100% { transform: scale(0.9); box-shadow: 0 0 0 0 rgba(250, 204, 21, 0.7); } 70% { transform: scale(1); box-shadow: 0 0 0 8px rgba(250, 204, 21, 0); } }
h1 { font-size: clamp(2.2rem, 7vw, 4rem); font-weight: 900; line-height: 1.1; letter-spacing: -2px; margin-bottom: 1.25rem; }
h1 span { background: linear-gradient(135deg, #facc15 0%, #fb923c 100%); -webkit-background-clip: text; -webkit-text-fill-color: transparent; filter: drop-shadow(0 0 20px var(--gold-glow)); }
.hero-sub { font-size: clamp(1rem, 2vw, 1.25rem); color: var(--text); max-width: 750px; margin: 0 auto 2.5rem; line-height: 1.6; font-weight: 600; opacity: 0.9; }
.btn-primary { display: inline-flex; align-items: center; gap: 0.7rem; background: var(--gold); color: #000; font-weight: 900; font-size: 1.1rem; padding: 1.15rem 3rem; border-radius: 4rem; text-decoration: none; transition: 0.4s; box-shadow: 0 12px 35px var(--gold-glow); animation: btnFloat 3s ease-in-out infinite; }
.btn-primary:hover { animation-play-state: paused; transform: scale(1.05); box-shadow: 0 20px 60px rgba(250, 204, 21, 0.9); }
@keyframes btnFloat { 0%, 100% { transform: translateY(0); } 50% { transform: translateY(-8px); } }
.stats-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(200px, 1fr)); gap: 2rem; width: 100%; max-width: 1100px; margin-top: 4rem; }
.stat-card { background: rgba(255,255,255,0.04); border: 1px solid var(--card-border); padding: 2.25rem 1.25rem; border-radius: 2rem; display: flex; flex-direction: column; justify-content: center; align-items: center; text-align: center; transition: 0.3s; backdrop-filter: blur(12px); min-height: 140px; }
.stat-card:hover { background: rgba(255,255,255,0.08); border-color: var(--gold); transform: translateY(-5px); }
.stat-num { font-size: 2.4rem; font-weight: 900; color: var(--gold); margin-bottom: 0.25rem; filter: drop-shadow(0 0 15px var(--gold-glow)); line-height: 1; }
.stat-label { font-size: 0.8rem; font-weight: 800; color: var(--muted); text-transform: uppercase; letter-spacing: 2px; line-height: 1.2; }
.ecosystem { max-width: 1260px; margin: 0 auto; padding: 8rem 1.5rem 10rem; position: relative; z-index: 1; }
.eco-header { text-align: center; margin-bottom: 4rem; }
.eco-label { color: var(--primary); font-weight: 900; font-size: 0.85rem; text-transform: uppercase; letter-spacing: 5px; margin-bottom: 1.25rem; }
h2 { font-size: clamp(2.2rem, 5.5vw, 3.5rem); font-weight: 900; margin-bottom: 1.5rem; }
.eco-desc { color: var(--muted); font-size: 1.2rem; max-width: 750px; margin: 0 auto; line-height: 1.6; }
.trinity { display: grid; grid-template-columns: repeat(auto-fit, minmax(360px, 1fr)); gap: 2.5rem; }
.card { background: rgba(255, 255, 255, 0.04); border: 1px solid var(--card-border); border-radius: 3rem; padding: 4rem 3rem; position: relative; overflow: hidden; transition: 0.5s cubic-bezier(0.2, 0.8, 0.2, 1); backdrop-filter: blur(24px); }
.card:hover { transform: translateY(-15px); background: rgba(255, 255, 255, 0.09); border-color: var(--primary); box-shadow: 0 40px 80px rgba(0,0,0,0.4); }
.card.active { border-color: var(--primary); background: linear-gradient(145deg, rgba(129, 140, 248, 0.08) 0%, rgba(255,255,255,0.01) 100%); }
.card-icon { width: 80px; height: 80px; background: rgba(255,255,255,0.06); border-radius: 1.75rem; display: flex; align-items: center; justify-content: center; font-size: 2.5rem; margin-bottom: 3rem; }
.card.active .card-icon { background: rgba(129, 140, 248, 0.25); border: 1px solid rgba(129, 140, 248, 0.4); }
.card-badge { position: absolute; top: 2.5rem; right: 3rem; font-size: 0.75rem; font-weight: 900; text-transform: uppercase; padding: 0.6rem 1.4rem; border-radius: 3rem; letter-spacing: 1px; }
.badge-active { background: var(--primary); color: #fff; box-shadow: 0 5px 20px var(--primary-glow); }
.badge-soon { background: rgba(255,255,255,0.08); color: var(--muted); border: 1px solid var(--card-border); }
h3 { font-size: 2rem; font-weight: 900; margin-bottom: 1.5rem; }
.card-p { color: var(--muted); line-height: 1.8; margin-bottom: 3rem; font-size: 1.05rem; }
.features { list-style: none; margin-bottom: 4rem; display: flex; flex-direction: column; gap: 1.2rem; }
.features li { display: flex; align-items: center; gap: 1rem; font-size: 1rem; font-weight: 600; color: var(--muted); }
.features li::before { content: '✦'; color: var(--gold); font-size: 0.75rem; }
.cta { display: block; width: 100%; padding: 1.4rem; text-align: center; border-radius: 1.75rem; font-weight: 900; text-decoration: none; transition: 0.3s; font-size: 1.05rem; }
.cta-active { background: var(--gold); color: #000; box-shadow: 0 10px 30px var(--gold-glow); }
.cta-active:hover { transform: scale(1.05); }
.cta-soon { background: rgba(255,255,255,0.08); color: var(--muted); cursor: default; }
footer { text-align: center; padding: 6rem 1.5rem; border-top: 1px solid var(--card-border); color: var(--muted); font-weight: 700; font-size: 1rem; }
footer a { color: var(--gold); text-decoration: none; }
@media (max-width: 768px) {
    .first-screen { padding-top: 5rem; height: auto; min-height: 100vh; }
    .stats-grid { grid-template-columns: repeat(2, 1fr); gap: 0.75rem; margin-top: 2rem; }
    .stat-card { padding: 1.25rem 0.75rem; min-height: 110px; border-radius: 1.5rem; }
    .trinity { grid-template-columns: 1fr; }
    .stat-num { font-size: 1.8rem; }
}

/* Tối ưu riêng cho Mobile xoay ngang (Landscape) */
@media (max-height: 500px) and (orientation: landscape) {
    .first-screen { padding-top: 4rem; padding-bottom: 2rem; }
    h1 { font-size: 2.2rem; margin-bottom: 0.75rem; }
    .hero-sub { font-size: 1rem; margin-bottom: 1.5rem; }
    .hero-badge { margin-bottom: 1rem; padding: 0.3rem 0.8rem; }
    .btn-primary { padding: 0.8rem 2rem; font-size: 1rem; }
    
    .stats-grid { 
        grid-template-columns: repeat(4, 1fr); 
        gap: 0.4rem; 
        margin-top: 1rem; 
    }
    .stat-card { padding: 0.5rem 0.3rem; min-height: 65px; border-radius: 0.75rem; }
    .stat-num { font-size: 1.1rem; }
    .stat-label { font-size: 0.55rem; letter-spacing: 0.5px; }
    
    .ecosystem { padding: 4rem 1.5rem; }
    .trinity { 
        grid-template-columns: repeat(3, 1fr); 
        gap: 1rem; 
    }
    .card { padding: 2rem 1.5rem; border-radius: 2rem; }
    .card-icon { width: 50px; height: 50px; font-size: 1.5rem; margin-bottom: 1.5rem; }
    .card-badge { top: 1.5rem; right: 1.5rem; padding: 0.4rem 0.8rem; font-size: 0.65rem; }
    h3 { font-size: 1.4rem; margin-bottom: 1rem; }
    .card-p { font-size: 0.9rem; margin-bottom: 1.5rem; line-height: 1.5; }
    .features { margin-bottom: 2rem; gap: 0.6rem; }
    .features li { font-size: 0.85rem; }
    .cta { padding: 1rem; font-size: 0.9rem; }
}