:root{
  --orange:#ff6700;
  --orange-dark:#e85d00;
  --orange-soft:#fff1e6;
  --ink:#16181d;
  --ink-soft:#3a3f4a;
  --muted:#6b7280;
  --line:#e9eaee;
  --bg:#ffffff;
  --bg-alt:#f7f7f8;
  --radius:16px;
  --shadow:0 1px 3px rgba(16,18,23,.06),0 8px 24px rgba(16,18,23,.05);
  --shadow-lg:0 4px 12px rgba(16,18,23,.08),0 20px 48px rgba(16,18,23,.08);
  --maxw:1120px;
}
*{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth;scroll-padding-top:80px}
body{
  font-family:'Inter',system-ui,-apple-system,'Segoe UI',Roboto,sans-serif;
  color:var(--ink);
  background:var(--bg);
  line-height:1.65;
  -webkit-font-smoothing:antialiased;
}
a{color:var(--orange);text-decoration:none}
.container{max-width:var(--maxw);margin:0 auto;padding:0 24px}
.container.narrow{max-width:820px}

/* ---------- NAV ---------- */
#navbar{
  position:sticky;top:0;z-index:100;
  background:rgba(255,255,255,.82);
  backdrop-filter:saturate(180%) blur(14px);
  border-bottom:1px solid var(--line);
}
.nav-inner{
  max-width:var(--maxw);margin:0 auto;padding:0 24px;
  height:62px;display:flex;align-items:center;justify-content:space-between;
}
.nav-brand{display:flex;align-items:center;gap:10px;font-weight:800;color:var(--ink);font-size:1.05rem}
.nav-brand img{width:28px;height:28px}
.nav-links{display:flex;align-items:center;gap:6px}
.nav-links a{
  color:var(--ink-soft);font-weight:600;font-size:.93rem;
  padding:8px 13px;border-radius:9px;transition:.15s;
}
.nav-links a:hover{background:var(--orange-soft);color:var(--orange-dark)}
.nav-cta{background:var(--ink);color:#fff!important}
.nav-cta:hover{background:var(--orange)!important;color:#fff!important}
.nav-toggle{display:none;background:none;border:0;font-size:1.5rem;cursor:pointer;color:var(--ink)}

/* ---------- HERO ---------- */
.hero{
  position:relative;overflow:hidden;
  padding:84px 0 72px;
  background:
    radial-gradient(120% 90% at 50% -10%, #fff6ee 0%, #ffffff 55%);
  border-bottom:1px solid var(--line);
}
.hero-glow{
  position:absolute;top:-180px;left:50%;transform:translateX(-50%);
  width:760px;height:480px;
  background:radial-gradient(circle, rgba(255,103,0,.16), transparent 70%);
  filter:blur(30px);pointer-events:none;
}
.hero-inner{position:relative;text-align:center}
.hero-title{
  font-size:clamp(2.6rem,6vw,4.6rem);font-weight:900;line-height:1.02;
  letter-spacing:-.03em;
  background:linear-gradient(180deg,#1a1c20,#3a3f4a);
  -webkit-background-clip:text;background-clip:text;color:transparent;
}
.hero-sub{
  max-width:680px;margin:18px auto 0;font-size:1.18rem;color:var(--ink-soft);
}
.hero-sub strong{color:var(--orange-dark)}

.btn-row{display:flex;flex-wrap:wrap;gap:12px;justify-content:center;margin-top:28px}
.btn{
  display:inline-flex;align-items:center;gap:9px;
  padding:12px 22px;border-radius:999px;font-weight:700;font-size:.96rem;
  transition:.18s;border:1px solid transparent;
}
.btn .ico{font-size:1.05rem}
.btn .ico-svg{width:1.05rem;height:1.05rem;display:block}
.btn-dark{background:var(--ink);color:#fff}
.btn-dark:hover{background:var(--orange);transform:translateY(-2px);box-shadow:0 10px 24px rgba(255,103,0,.28)}

/* ---------- SECTIONS ---------- */
.section{padding:88px 0}
.section-alt{background:var(--bg-alt);border-top:1px solid var(--line);border-bottom:1px solid var(--line)}
.section-title{
  font-size:clamp(1.9rem,3.6vw,2.6rem);font-weight:900;letter-spacing:-.025em;
  text-align:center;margin-bottom:14px;
}
.section-title::after{
  content:"";display:block;width:56px;height:4px;border-radius:2px;
  background:var(--orange);margin:16px auto 0;
}
.section-intro{
  max-width:760px;margin:0 auto 44px;text-align:center;
  color:var(--ink-soft);font-size:1.08rem;
}
.lead{font-size:1.18rem;color:var(--ink-soft);margin-bottom:18px;text-align:justify;hyphens:auto}
.section p{margin-bottom:16px}
.section.narrow p, .container.narrow p{color:var(--ink-soft)}

/* ---------- PILLARS ---------- */
.pillars{display:grid;grid-template-columns:repeat(2,1fr);gap:20px;margin-top:42px}
.pillar{
  background:#fff;border:1px solid var(--line);border-radius:var(--radius);
  padding:28px;box-shadow:var(--shadow);transition:.2s;
}
.pillar:hover{transform:translateY(-3px);box-shadow:var(--shadow-lg);border-color:#ffd9bd}
.pillar-head{display:flex;align-items:center;gap:12px;margin-bottom:10px}
.pillar-ico{font-size:1.6rem;line-height:1;flex-shrink:0}
.pillar h3{font-size:1.12rem;font-weight:800;margin:0}
.pillar p{color:var(--muted);font-size:.95rem;margin:0;text-align:justify;hyphens:auto}

/* ---------- CARDS ---------- */
.card{
  background:#fff;border:1px solid var(--line);border-radius:var(--radius);
  padding:30px;box-shadow:var(--shadow);margin-bottom:26px;
}
.card-title{font-size:1.2rem;font-weight:800;margin-bottom:6px}
.card-note{color:var(--muted);font-size:.9rem;margin-bottom:20px}

/* ---------- BARS ---------- */
.bars{display:flex;flex-direction:column;gap:11px;margin-top:14px}
.bar-row{display:grid;grid-template-columns:210px 1fr 56px;align-items:center;gap:14px}
.bar-label{font-size:.9rem;font-weight:600;color:var(--ink-soft);text-align:right;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.bar-track{background:#f0f0f2;border-radius:999px;height:22px;overflow:hidden}
.bar-fill{
  height:100%;border-radius:999px;width:0;
  background:linear-gradient(90deg,#ffb37a,#ff6700);
  transition:width 1.1s cubic-bezier(.2,.7,.2,1);
}
.bar-fill.is-ours{background:linear-gradient(90deg,#16181d,#3a3f4a)}
.bar-row.ours .bar-label{color:var(--orange-dark);font-weight:800}
.bar-val{font-size:.9rem;font-weight:800;color:var(--ink)}
.bar-row.ours .bar-val{color:var(--orange-dark)}

/* ---------- TABLES ---------- */
.table-wrap{overflow-x:auto;border-radius:12px;border:1px solid var(--line)}
.data-table{width:100%;border-collapse:collapse;font-size:.92rem;min-width:520px}
.data-table th{
  background:#fafafb;text-align:center;padding:13px 14px;font-weight:700;
  color:var(--ink-soft);border-bottom:2px solid var(--line);font-size:.85rem;
}
.data-table th:first-child{text-align:left}
.data-table td{padding:11px 14px;text-align:center;border-bottom:1px solid var(--line)}
.data-table td:first-child{text-align:left;color:var(--ink-soft)}
.data-table tr.group td{
  background:var(--orange-soft);color:var(--orange-dark);font-weight:800;
  text-align:left;font-size:.82rem;text-transform:uppercase;letter-spacing:.04em;padding:8px 14px;
}
.data-table tr.ours-row td{background:#fff7f0;color:var(--ink);font-size:.95rem}
.data-table tr.ours-row td:first-child{color:var(--orange-dark)}
.data-table.compact td,.data-table.compact th{padding:9px 10px;font-size:.86rem}
.data-table tbody tr:not(.group):hover{background:#fcfcfd}

/* ---------- FIGURES ---------- */
.figure{
  background:#fff;border:1px solid var(--line);border-radius:var(--radius);
  padding:18px;box-shadow:var(--shadow);margin:0 0 24px;
}
.figure img{width:100%;height:auto;border-radius:8px;display:block}
.figure figcaption{margin-top:14px;color:var(--muted);font-size:.88rem;text-align:center;line-height:1.5}
.figure.wide{margin-bottom:28px}
.figure-grid{display:grid;gap:20px;margin-bottom:0}
.figure-grid.two{grid-template-columns:1fr 1fr}
.figure-grid .figure{margin-bottom:24px}

/* ---------- DOMAIN GRID ---------- */
.domain-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:18px;margin:8px 0 36px}
.domain-card{
  background:#fff;border:1px solid var(--line);border-radius:var(--radius);
  padding:24px 20px;box-shadow:var(--shadow);position:relative;transition:.2s;
}
.domain-card:hover{transform:translateY(-3px);box-shadow:var(--shadow-lg)}
.domain-count{
  display:inline-block;background:var(--orange);color:#fff;font-weight:800;
  font-size:.74rem;padding:4px 11px;border-radius:999px;margin-bottom:12px;
}
.domain-card h3{font-size:1.04rem;font-weight:800;margin-bottom:7px}
.domain-card p{color:var(--muted);font-size:.88rem;margin:0;text-align:justify;hyphens:auto}

/* ---------- METHOD ---------- */
.method-block{margin-bottom:52px}
.method-h{
  font-size:1.4rem;font-weight:800;margin-bottom:12px;letter-spacing:-.01em;
  padding-left:16px;border-left:4px solid var(--orange);
}
.method-block>p{color:var(--ink-soft);margin-bottom:24px;text-align:justify;hyphens:auto}

.train-flow{display:flex;align-items:center;justify-content:center;gap:18px;flex-wrap:wrap;margin:0 0 28px}
.train-stage{
  background:#fff;border:2px solid var(--orange);border-radius:14px;
  padding:18px 28px;text-align:center;min-width:160px;box-shadow:var(--shadow);
}
.ts-num{display:block;font-weight:900;font-size:1.25rem;color:var(--orange-dark)}
.ts-desc{display:block;font-size:.84rem;color:var(--muted);margin-top:4px;font-weight:600}
.train-arrow{font-size:1.8rem;color:var(--orange);font-weight:700}

/* ---------- CITATION ---------- */
.cite-box{position:relative;background:#15171c;border-radius:var(--radius);padding:26px;overflow:hidden;box-shadow:var(--shadow-lg)}
.cite-box pre{
  font-family:'JetBrains Mono',monospace;color:#e6e6e8;font-size:.86rem;
  line-height:1.7;overflow-x:auto;
}
.copy-btn{
  position:absolute;top:16px;right:16px;
  background:var(--orange);color:#fff;border:0;border-radius:8px;
  padding:7px 15px;font-weight:700;font-size:.82rem;cursor:pointer;transition:.15s;font-family:inherit;
}
.copy-btn:hover{background:var(--orange-dark)}

/* ---------- FOOTER ---------- */
footer{background:#15171c;color:#cfd1d6;padding:52px 0;text-align:center}
.footer-logo{width:44px;height:44px;margin-bottom:16px}
footer p{margin-bottom:8px}
footer strong{color:#fff}
.footer-fine{color:#7c8088;font-size:.84rem;margin-top:8px}

/* ---------- REVEAL ---------- */
.reveal{opacity:0;transform:translateY(24px);transition:opacity .7s ease,transform .7s ease}
.reveal.in{opacity:1;transform:none}

/* ---------- RESPONSIVE ---------- */
@media(max-width:880px){
  .pillars{grid-template-columns:1fr}
  .domain-grid{grid-template-columns:1fr 1fr}
  .figure-grid.two{grid-template-columns:1fr}
}
@media(max-width:680px){
  .nav-links{
    display:none;position:absolute;top:62px;left:0;right:0;
    flex-direction:column;background:#fff;border-bottom:1px solid var(--line);
    padding:12px;gap:4px;
  }
  .nav-links.open{display:flex}
  .nav-toggle{display:block}
  .bar-row{grid-template-columns:120px 1fr 46px;gap:8px}
  .bar-label{font-size:.78rem}
  .domain-grid{grid-template-columns:1fr}
  .section{padding:60px 0}
  .train-arrow{transform:rotate(90deg)}
}

/* ---------- DEMOS (carousel) ---------- */
.demo-carousel{
  margin-top:36px;
}
.demo-viewport{
  position:relative;
  overflow:hidden;
  border-radius:var(--radius);
  box-shadow:var(--shadow);
  border:1px solid var(--line);
  background:var(--bg);
  container-type:inline-size;
}
.demo-track{
  display:flex;
  transition:transform .45s cubic-bezier(.4,0,.2,1);
}
.demo-slide{
  flex:0 0 100%;
  min-width:0;
  display:flex;
  flex-direction:column;
}
.demo-video{
  position:relative;
  width:100%;
  aspect-ratio:16/9;
  background:#0d0f13;
}
.demo-video video{
  position:absolute;inset:0;
  width:100%;height:100%;
  object-fit:contain;
  display:block;
}
.demo-cap{
  padding:22px 28px 26px;
  border-top:1px solid var(--line);
}
.demo-badge{
  display:inline-block;
  font-size:.78rem;font-weight:700;
  letter-spacing:.02em;
  color:var(--orange-dark);
  background:var(--orange-soft);
  padding:5px 12px;border-radius:999px;
}
.demo-app{
  display:inline-block;
  margin-left:12px;
  font-size:.88rem;font-weight:600;
  color:var(--muted);
}
.demo-query{
  margin-top:12px;
  font-size:1.02rem;
  line-height:1.65;
  color:var(--ink-soft);
  max-width:none;
}
.demo-query-en{
  margin-top:8px;
  font-size:.92rem;
  line-height:1.6;
  color:var(--muted);
  max-width:none;
}
.demo-nav{
  position:absolute;
  top:28.125cqw;
  transform:translateY(-50%);
  z-index:3;
  width:48px;height:48px;
  border-radius:50%;
  border:none;
  background:rgba(20,24,29,.55);
  backdrop-filter:blur(4px);
  color:#fff;
  font-size:1.7rem;line-height:1;
  cursor:pointer;
  display:flex;align-items:center;justify-content:center;
  transition:background .2s,transform .2s;
}
.demo-nav.prev{left:16px}
.demo-nav.next{right:16px}
.demo-nav:hover{background:var(--orange);transform:translateY(-50%) scale(1.08)}
.demo-dots{
  display:flex;
  justify-content:center;
  gap:10px;
  margin-top:22px;
}
.demo-dot{
  width:10px;height:10px;
  border-radius:50%;
  border:none;
  background:var(--line);
  cursor:pointer;
  padding:0;
  transition:background .2s,transform .2s;
}
.demo-dot:hover{background:#c9ccd3}
.demo-dot.active{background:var(--orange);transform:scale(1.25)}
@media (max-width:860px){
  .demo-cap{padding:18px 20px 22px}
  .demo-query{font-size:.95rem}
  .demo-nav{width:40px;height:40px;font-size:1.4rem}
  .demo-nav.prev{left:10px}
  .demo-nav.next{right:10px}
  .demo-app{display:block;margin-left:0;margin-top:8px}
}

/* ---------- CASE STUDIES ---------- */
.case-grid{
  display:grid;
  grid-template-columns:1fr 1fr;
  gap:28px;
  margin-top:36px;
  align-items:start;
}
.case-card{
  background:var(--bg);
  border:1px solid var(--line);
  border-radius:var(--radius);
  box-shadow:var(--shadow);
  overflow:hidden;
}
.case-img{
  display:block;
  width:100%;
  padding:0;
  border:none;
  background:#f3f4f6;
  cursor:zoom-in;
  line-height:0;
}
.case-img img{
  width:100%;
  aspect-ratio:1473/2103;
  height:auto;
  object-fit:cover;
  object-position:top;
  display:block;
  transition:transform .3s ease;
}
.case-img:hover img{transform:scale(1.015)}
.case-card figcaption{padding:20px 22px 22px}
.case-badge{
  display:inline-block;
  font-size:.78rem;font-weight:700;
  letter-spacing:.02em;
  color:var(--orange-dark);
  background:var(--orange-soft);
  padding:5px 12px;border-radius:999px;
}
.case-card figcaption p{
  margin-top:12px;
  font-size:.95rem;
  line-height:1.6;
  color:var(--ink-soft);
}
/* lightbox */
.lightbox{
  position:fixed;inset:0;z-index:1000;
  display:none;
  align-items:center;justify-content:center;
  background:rgba(12,14,18,.88);
  padding:32px;
  cursor:zoom-out;
}
.lightbox.open{display:flex}
.lightbox img{
  max-width:95vw;
  max-height:92vh;
  border-radius:8px;
  box-shadow:0 20px 60px rgba(0,0,0,.5);
}
.lightbox-close{
  position:absolute;top:20px;right:28px;
  width:44px;height:44px;
  border:none;border-radius:50%;
  background:rgba(255,255,255,.12);
  color:#fff;font-size:2rem;line-height:1;
  cursor:pointer;
  display:flex;align-items:center;justify-content:center;
  transition:background .2s;
}
.lightbox-close:hover{background:rgba(255,255,255,.25)}
@media (max-width:860px){
  .case-grid{grid-template-columns:1fr;max-width:560px;margin-left:auto;margin-right:auto}
}