:root {
  --bg: #050b18; --bg2: #081227; --ink: #e8eefc; --muted: #93a3c4; --line: rgba(148, 163, 196, .16);
  --cyan: #22d3ee; --teal: #14b8a6; --violet: #8b5cf6; --gold: #f5b942; --card: rgba(13, 24, 48, .72);
  --radius: 18px; --max: 1180px;
  --font: "Inter", "SF Pro Display", -apple-system, BlinkMacSystemFont, "Segoe UI", "Noto Sans Thai", "Sukhumvit Set", Roboto, sans-serif;
}
* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body { margin: 0; background: radial-gradient(1200px 700px at 80% -10%, #12204a 0%, transparent 60%), radial-gradient(900px 600px at -10% 30%, #0b2a3a 0%, transparent 55%), var(--bg); color: var(--ink); font: 16px/1.6 var(--font); overflow-x: hidden; }
a { color: inherit; }
#neural { position: fixed; inset: 0; width: 100%; height: 100%; z-index: 0; pointer-events: none; opacity: .55; }
.nav, header, section, footer { position: relative; z-index: 1; }
.small { font-size: 13px; } .muted { color: var(--muted); }

/* ---------- nav ---------- */
.nav { position: sticky; top: 0; display: flex; justify-content: space-between; align-items: center; gap: 16px; padding: 14px clamp(16px, 4vw, 48px); backdrop-filter: blur(14px); background: rgba(5, 11, 24, .55); border-bottom: 1px solid transparent; transition: border-color .3s, background .3s; z-index: 10; }
.nav.scrolled { border-bottom-color: var(--line); background: rgba(5, 11, 24, .82); }
.logo { display: flex; align-items: center; gap: 10px; font-weight: 800; letter-spacing: .04em; text-decoration: none; font-size: 19px; }
.logo small { font-weight: 500; color: var(--muted); letter-spacing: 0; font-size: 13px; }
.logo-mark { width: 26px; height: 26px; border-radius: 8px; display: inline-block; vertical-align: middle; background: conic-gradient(from 210deg, var(--cyan), var(--violet), var(--gold), var(--cyan)); box-shadow: 0 0 18px rgba(34, 211, 238, .5); position: relative; }
.logo-mark::after { content: ""; position: absolute; inset: 6px; border-radius: 4px; background: var(--bg); box-shadow: inset 0 0 0 2px rgba(255,255,255,.12); }
.nav-links { display: flex; align-items: center; gap: 22px; font-size: 14px; }
.nav-links a:not(.btn) { text-decoration: none; color: var(--muted); transition: color .2s; }
.nav-links a:not(.btn):hover { color: var(--ink); }
@media (max-width: 980px) { .nav-links a:not(.btn) { display: none; } .nav-links .btn-ghost { display: none; } }

/* ---------- buttons ---------- */
.btn { display: inline-flex; align-items: center; gap: 8px; padding: 10px 18px; border-radius: 999px; font-weight: 600; text-decoration: none; font-size: 14px; transition: transform .15s, box-shadow .2s, background .2s; }
.btn-lg { padding: 14px 24px; font-size: 16px; }
.btn-primary { background: linear-gradient(135deg, var(--cyan), var(--violet)); color: #041022; box-shadow: 0 8px 30px rgba(34, 211, 238, .25); }
.btn-primary:hover { transform: translateY(-2px); box-shadow: 0 12px 36px rgba(139, 92, 246, .35); }
.btn-ghost { border: 1px solid rgba(232, 238, 252, .28); color: var(--ink); }
.btn-ghost:hover { background: rgba(232, 238, 252, .08); }
.cta { display: flex; gap: 12px; flex-wrap: wrap; margin-top: 28px; } .cta.center { justify-content: center; }

/* ---------- hero ---------- */
.hero { min-height: calc(100vh - 60px); max-width: var(--max); margin: 0 auto; padding: 40px clamp(16px, 4vw, 32px) 80px; display: grid; grid-template-columns: 1.05fr 1fr; align-items: center; gap: 24px; }
@media (max-width: 980px) { .hero { grid-template-columns: 1fr; padding-top: 24px; } .hero-visual { order: -1; max-width: 460px; margin: 0 auto; } }
.eyebrow { display: inline-flex; align-items: center; gap: 10px; font-size: 13px; color: var(--muted); border: 1px solid var(--line); padding: 6px 12px; border-radius: 999px; background: rgba(13, 24, 48, .5); }
.eyebrow .dot { width: 8px; height: 8px; border-radius: 50%; background: var(--gold); box-shadow: 0 0 12px var(--gold); animation: pulse 2s infinite; }
@keyframes pulse { 50% { opacity: .35; } }
h1 { font-size: clamp(32px, 4.3vw, 54px); line-height: 1.08; letter-spacing: -.02em; margin: 22px 0 18px; font-weight: 800; }
.grad { background: linear-gradient(100deg, var(--cyan), #7dd3fc 60%, var(--teal)); -webkit-background-clip: text; background-clip: text; color: transparent; }
.grad.gold { background-image: linear-gradient(100deg, var(--gold), #fde68a); }
.grad.violet { background-image: linear-gradient(100deg, #c4b5fd, var(--violet)); }
.lede { font-size: 18px; color: #c3cfe8; max-width: 620px; }
.thai { color: var(--gold); font-size: 15px; opacity: .9; }
.stats { display: grid; grid-template-columns: repeat(4, auto); gap: 18px 32px; margin: 36px 0 0; }
@media (max-width: 560px) { .stats { grid-template-columns: repeat(2, auto); } }
.stats dt { font-size: 30px; font-weight: 800; letter-spacing: -.01em; }
.stats dd { margin: 0; color: var(--muted); font-size: 13px; }
.hero-visual { position: relative; aspect-ratio: 1; width: 100%; }
#core { width: 100%; height: 100%; overflow: visible; filter: drop-shadow(0 0 40px rgba(34, 211, 238, .18)); }
.hud { position: absolute; font-size: 11px; letter-spacing: .08em; padding: 8px 12px; border: 1px solid rgba(34, 211, 238, .35); background: rgba(5, 11, 24, .72); border-radius: 10px; backdrop-filter: blur(6px); display: flex; flex-direction: column; animation: float 6s ease-in-out infinite; }
.hud b { color: var(--cyan); font-weight: 700; } .hud span { color: var(--muted); letter-spacing: 0; font-size: 12px; }
.hud-1 { top: 8%; left: -2%; } .hud-2 { bottom: 14%; left: 2%; animation-delay: -2s; border-color: rgba(245, 185, 66, .4); } .hud-2 b { color: var(--gold); }
.hud-3 { top: 40%; right: -4%; animation-delay: -4s; border-color: rgba(139, 92, 246, .45); } .hud-3 b { color: #c4b5fd; }
@keyframes float { 50% { transform: translateY(-10px); } }
.scroll-cue { position: absolute; bottom: 22px; left: 50%; width: 24px; height: 38px; border: 2px solid rgba(232, 238, 252, .35); border-radius: 14px; transform: translateX(-50%); }
.scroll-cue span { position: absolute; left: 50%; top: 8px; width: 4px; height: 8px; border-radius: 2px; background: var(--cyan); transform: translateX(-50%); animation: cue 1.8s infinite; }
@keyframes cue { 70% { transform: translate(-50%, 12px); opacity: 0; } 100% { opacity: 0; } }

/* SVG core parts */
.gear { transform-origin: 0 0; }
.spin-cw { animation: spin 40s linear infinite; } .spin-ccw { animation: spin 28s linear infinite reverse; } .spin-fast { animation: spin 14s linear infinite; }
@keyframes spin { to { transform: rotate(360deg); } }
.orbit-dot { animation: spin 9s linear infinite; transform-origin: 0 0; }
.scan { animation: scan 4s ease-in-out infinite; }
@keyframes scan { 0%, 100% { transform: translateY(-46px); opacity: 0; } 15%, 85% { opacity: .9; } 50% { transform: translateY(46px); } }
.trace { stroke-dasharray: 6 10; animation: flow 1.6s linear infinite; }
@keyframes flow { to { stroke-dashoffset: -32; } }
.blink { animation: pulse 1.4s infinite; }

/* ---------- sections ---------- */
.section { padding: 110px clamp(16px, 4vw, 32px); }
.section-alt { background: linear-gradient(180deg, transparent, rgba(8, 18, 39, .75) 12%, rgba(8, 18, 39, .75) 88%, transparent); }
.section-head { max-width: 760px; margin: 0 auto 56px; text-align: center; }
.kicker { color: var(--cyan); font-weight: 700; letter-spacing: .14em; text-transform: uppercase; font-size: 12px; margin: 0 0 10px; }
h2 { font-size: clamp(28px, 3.6vw, 44px); line-height: 1.15; letter-spacing: -.015em; margin: 0 0 16px; }
h3 { font-size: 21px; margin: 0 0 10px; }
.reveal { opacity: 0; transform: translateY(26px); transition: opacity .8s ease, transform .8s ease; }
.reveal.in { opacity: 1; transform: none; }

/* ---------- stages ---------- */
.stages { position: relative; max-width: var(--max); margin: 0 auto; display: grid; grid-template-columns: repeat(3, 1fr); gap: 22px; }
@media (max-width: 900px) { .stages { grid-template-columns: 1fr; } .circuit { display: none; } }
.circuit { position: absolute; top: 96px; left: 0; width: 100%; height: 120px; z-index: 0; pointer-events: none; }
.stage { position: relative; z-index: 1; padding: 26px; border-radius: var(--radius); background: var(--card); border: 1px solid var(--line); backdrop-filter: blur(10px); transition: transform .3s, border-color .3s, box-shadow .3s; }
.stage:hover { transform: translateY(-6px); border-color: rgba(34, 211, 238, .45); box-shadow: 0 20px 50px rgba(0, 0, 0, .35), 0 0 0 1px rgba(34, 211, 238, .15) inset; }
.stage[data-stage="2"]:hover { border-color: rgba(245, 185, 66, .5); } .stage[data-stage="3"]:hover { border-color: rgba(139, 92, 246, .55); }
.stage-art { height: 170px; margin: -6px -6px 14px; border-radius: 12px; background: radial-gradient(circle at 50% 60%, rgba(34, 211, 238, .12), transparent 65%); }
.stage-art svg { width: 100%; height: 100%; }
.stage-n { font-size: 12px; letter-spacing: .16em; color: var(--muted); margin: 0 0 4px; text-transform: uppercase; }
.stage p { color: #c3cfe8; } .stage ul { margin: 12px 0 0; padding-left: 18px; color: var(--muted); font-size: 14px; }

/* ---------- curriculum ---------- */
.toggle { display: inline-flex; margin-top: 18px; border: 1px solid var(--line); border-radius: 999px; padding: 4px; background: rgba(13, 24, 48, .6); }
.toggle button { background: none; border: 0; color: var(--muted); padding: 8px 16px; border-radius: 999px; font: 600 14px var(--font); cursor: pointer; }
.toggle button.on { background: linear-gradient(135deg, var(--cyan), var(--violet)); color: #041022; }
.quarters { max-width: var(--max); margin: 0 auto; display: grid; grid-template-columns: repeat(4, 1fr); gap: 16px; }
@media (max-width: 1000px) { .quarters { grid-template-columns: repeat(2, 1fr); } } @media (max-width: 560px) { .quarters { grid-template-columns: 1fr; } }
.q { padding: 22px; border-radius: var(--radius); background: var(--card); border: 1px solid var(--line); position: relative; overflow: hidden; }
.q::before { content: ""; position: absolute; inset: 0 0 auto 0; height: 3px; background: var(--accent, var(--cyan)); }
.q .qn { font-size: 12px; color: var(--muted); letter-spacing: .14em; } .q h3 { font-size: 18px; margin: 6px 0 10px; }
.q p { font-size: 14px; color: #c3cfe8; margin: 0; transition: opacity .25s; } .q .weeks { margin-top: 14px; font-size: 12px; color: var(--muted); }
.q .stage-tag { display: inline-block; font-size: 11px; padding: 2px 8px; border-radius: 999px; border: 1px solid var(--line); color: var(--muted); margin-top: 12px; }
.year2 { max-width: var(--max); margin: 18px auto 0; text-align: center; color: var(--muted); font-size: 14px; }
.lesson-anatomy { max-width: 920px; margin: 70px auto 0; text-align: center; }
.timeline { display: flex; height: 74px; border-radius: 14px; overflow: hidden; border: 1px solid var(--line); margin: 18px 0; }
.seg { display: flex; flex-direction: column; justify-content: center; padding: 0 10px; font-size: 12px; text-align: left; transform-origin: left; transform: scaleX(0); transition: transform .7s cubic-bezier(.2, .8, .2, 1); }
.timeline.in .seg { transform: scaleX(1); }
.seg b { font-size: 13px; } .seg span { color: rgba(4, 16, 34, .8); line-height: 1.25; }
.s1 { flex: 5; background: #7dd3fc; color: #041022; } .s2 { flex: 10; background: #22d3ee; color: #041022; transition-delay: .1s; }
.s3 { flex: 25; background: linear-gradient(90deg, #14b8a6, #8b5cf6); color: #041022; transition-delay: .2s; }
.s4 { flex: 5; background: #f5b942; color: #041022; transition-delay: .3s; } .s5 { flex: 5; background: #fde68a; color: #041022; transition-delay: .4s; }
@media (max-width: 640px) { .seg span { display: none; } }

/* ---------- region ---------- */
.region { max-width: var(--max); margin: 0 auto; display: grid; grid-template-columns: 1fr 1fr; gap: 40px; align-items: center; }
@media (max-width: 900px) { .region { grid-template-columns: 1fr; } }
.ticks { list-style: none; padding: 0; margin: 22px 0 0; display: grid; gap: 12px; }
.ticks li { padding-left: 30px; position: relative; color: #c3cfe8; }
.ticks li::before { content: ""; position: absolute; left: 0; top: 6px; width: 16px; height: 16px; border-radius: 5px; border: 2px solid var(--gold); box-shadow: 0 0 10px rgba(245, 185, 66, .45); }
.ticks b { color: var(--ink); }
.map-wrap { position: relative; border-radius: 24px; border: 1px solid var(--line); background: radial-gradient(circle at 40% 40%, rgba(34, 211, 238, .08), transparent 70%), rgba(8, 18, 39, .6); padding: 10px; }
#seamap { width: 100%; height: auto; max-height: 620px; display: block; margin: 0 auto; }
.city-label { font: 600 13px var(--font); fill: var(--ink); } .city-sub { font: 11px var(--font); fill: var(--muted); }
.ring { transform-box: fill-box; transform-origin: center; animation: ring 2.6s ease-out infinite; }
@keyframes ring { from { transform: scale(.4); opacity: .9; } to { transform: scale(2.6); opacity: 0; } }
.arc { stroke-dasharray: 4 7; animation: flow 1.4s linear infinite; }

/* ---------- platform ---------- */
.features { max-width: var(--max); margin: 0 auto; display: grid; grid-template-columns: repeat(3, 1fr); gap: 18px; }
@media (max-width: 960px) { .features { grid-template-columns: repeat(2, 1fr); } } @media (max-width: 600px) { .features { grid-template-columns: 1fr; } }
.feature { padding: 26px; border-radius: var(--radius); background: var(--card); border: 1px solid var(--line); transition: border-color .3s, transform .3s; }
.feature:hover { border-color: rgba(34, 211, 238, .4); transform: translateY(-4px); }
.feature p { color: #c3cfe8; font-size: 15px; margin: 0; }
.ficon { width: 54px; height: 54px; margin-bottom: 16px; } .ficon svg { width: 100%; height: 100%; }

/* ---------- teachers ---------- */
.teachers { max-width: var(--max); margin: 0 auto; display: grid; grid-template-columns: .9fr 1.1fr; gap: 50px; align-items: center; }
@media (max-width: 900px) { .teachers { grid-template-columns: 1fr; } }
.training { list-style: none; margin: 0; padding: 0; display: grid; gap: 12px; counter-reset: t; }
.training li { display: grid; grid-template-columns: 64px 1fr; grid-template-rows: auto auto; column-gap: 16px; padding: 16px 18px; border-radius: 14px; background: var(--card); border: 1px solid var(--line); position: relative; overflow: hidden; }
.training li::before { content: attr(data-h) "h"; grid-row: 1 / 3; align-self: center; font-size: 26px; font-weight: 800; color: var(--cyan); }
.training li::after { content: ""; position: absolute; left: 0; bottom: 0; height: 3px; width: 0; background: linear-gradient(90deg, var(--cyan), var(--violet)); transition: width 1.2s ease; }
.training.in li::after { width: var(--w, 50%); }
.training span { color: var(--muted); font-size: 14px; }
.frameworks { max-width: var(--max); margin: 80px auto 0; text-align: center; }
.logos { display: flex; flex-wrap: wrap; justify-content: center; gap: 10px; margin: 16px 0; }
.logos span { padding: 10px 16px; border-radius: 12px; border: 1px solid var(--line); background: rgba(13, 24, 48, .55); color: #c3cfe8; font-size: 14px; }

/* ---------- gallery ---------- */
.gallery { max-width: var(--max); margin: 0 auto; display: grid; grid-template-columns: repeat(auto-fit, minmax(min(100%, 460px), 1fr)); gap: 18px; }
.gallery figure { margin: 0; border-radius: var(--radius); overflow: hidden; border: 1px solid var(--line); }
.gallery img { width: 100%; height: auto; aspect-ratio: 800 / 520; object-fit: cover; display: block; }
.gallery figcaption { padding: 10px 14px; font-size: 13px; color: var(--muted); }

/* ---------- pilot ---------- */
.pilot-card { max-width: 900px; margin: 0 auto; text-align: center; padding: 56px clamp(20px, 5vw, 64px); border-radius: 28px; border: 1px solid rgba(34, 211, 238, .3);
  background: radial-gradient(600px 300px at 20% 0%, rgba(34, 211, 238, .16), transparent 70%), radial-gradient(600px 300px at 100% 100%, rgba(139, 92, 246, .2), transparent 70%), rgba(8, 18, 39, .85); }
.pilot-card p { color: #c3cfe8; font-size: 17px; }
.footer { display: grid; gap: 6px; justify-items: center; padding: 40px 16px 60px; border-top: 1px solid var(--line); text-align: center; }

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { animation: none !important; transition: none !important; }
  .reveal { opacity: 1; transform: none; } .seg { transform: none; } #neural { display: none; }
}
/* language switcher + per-language typography */
.lang-switch { display: inline-flex; border: 1px solid var(--line); border-radius: 999px; padding: 3px; gap: 2px; background: rgba(13, 24, 48, .5); }
.lang-switch button { background: none; border: 0; color: var(--muted); font: 600 12px var(--font); padding: 5px 10px; border-radius: 999px; cursor: pointer; }
.lang-switch button.on { background: linear-gradient(135deg, var(--cyan), var(--violet)); color: #041022; }
@media (max-width: 980px) { .nav-links .lang-switch { display: inline-flex; } }
html[data-lang="th"] body { font-family: "Noto Sans Thai", "Sukhumvit Set", "Sarabun", var(--font); }
html[data-lang="th"] h1, html[data-lang="th"] h2 { line-height: 1.3; letter-spacing: 0; }
html[data-lang="zh"] body { font-family: -apple-system, "PingFang SC", "Noto Sans SC", "Microsoft YaHei", var(--font); }
html[data-lang="zh"] h1, html[data-lang="zh"] h2 { letter-spacing: 0; line-height: 1.25; }