:root{--bg:#030611;--panel:rgba(10,18,40,.68);--line:rgba(126,170,255,.18);--text:#f7f9ff;--muted:#9aa7c7;--cyan:#67e8ff;--violet:#9c73ff}
*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;background:var(--bg);color:var(--text);font-family:Inter,"Noto Sans SC",system-ui,sans-serif;overflow-x:hidden}a{color:inherit;text-decoration:none}button{font:inherit}
.site-header{position:fixed;z-index:50;top:0;left:0;right:0;height:74px;padding:0 max(20px,calc((100vw - 1200px)/2));display:flex;align-items:center;gap:24px;background:linear-gradient(rgba(3,6,17,.9),rgba(3,6,17,.35));backdrop-filter:blur(16px);border-bottom:1px solid transparent}.site-header.scrolled{border-color:var(--line);background:rgba(3,6,17,.9)}
.brand{display:flex;align-items:center;gap:11px;font-weight:800;letter-spacing:.12em}.brand-mark{width:42px;height:42px;display:grid;place-items:center;border:1px solid rgba(103,232,255,.42);border-radius:12px;color:var(--cyan);font-size:.75rem;box-shadow:inset 0 0 20px rgba(103,232,255,.1)}
.nav{display:flex;gap:22px;margin-left:auto}.nav a{font-size:.9rem;color:var(--muted)}.nav a:hover{color:#fff}.nav .system{padding:9px 13px;border:1px solid var(--line);border-radius:999px;color:#fff}.lang-links{display:flex;gap:7px}.lang-links a{padding:8px 9px;border:1px solid var(--line);border-radius:9px;color:var(--muted);font-size:.78rem}.lang-links a[aria-current="page"]{color:#051018;background:var(--cyan)}.menu{display:none;border:0;background:none;color:#fff;font-size:1.4rem}
.hero{position:relative;min-height:100svh;display:flex;align-items:center;padding:120px max(22px,calc((100vw - 1200px)/2)) 110px;overflow:hidden}.hero-video{position:absolute;inset:0;width:100%;height:100%;object-fit:cover;z-index:-4}.video-overlay{position:absolute;inset:0;z-index:-3;background:linear-gradient(90deg,rgba(3,6,17,.96) 0%,rgba(3,6,17,.76) 40%,rgba(3,6,17,.22) 72%,rgba(3,6,17,.4)),linear-gradient(0deg,#030611 0%,transparent 26%,rgba(3,6,17,.2) 100%)}.video-grid{position:absolute;inset:0;z-index:-2;opacity:.16;background-image:linear-gradient(rgba(103,232,255,.12) 1px,transparent 1px),linear-gradient(90deg,rgba(103,232,255,.12) 1px,transparent 1px);background-size:60px 60px;mask-image:linear-gradient(to bottom,transparent,black 35%,transparent)}
.hero-content{max-width:760px}.eyebrow{display:inline-flex;align-items:center;gap:9px;padding:8px 12px;border:1px solid var(--line);border-radius:999px;background:rgba(10,18,40,.52);color:var(--muted);font-size:.8rem}.dot{width:7px;height:7px;border-radius:50%;background:#5af2b5;box-shadow:0 0 14px #5af2b5}
h1{margin:24px 0 18px;font-size:clamp(3.8rem,9vw,8.2rem);line-height:.82;letter-spacing:-.068em}h1 span{display:block}.gradient{background:linear-gradient(90deg,#fff,var(--cyan),#ac8cff);-webkit-background-clip:text;color:transparent}.lead{max-width:620px;color:var(--muted);font-size:clamp(1rem,2vw,1.22rem);line-height:1.8}.actions{display:flex;gap:13px;flex-wrap:wrap;margin-top:30px}.btn{display:inline-flex;align-items:center;justify-content:center;min-height:48px;padding:0 20px;border-radius:12px;font-weight:700}.primary{background:linear-gradient(135deg,var(--cyan),#87a1ff);color:#041019;box-shadow:0 13px 45px rgba(65,202,255,.24)}.ghost{border:1px solid var(--line);background:rgba(255,255,255,.035)}
.scroll-cue{position:absolute;left:50%;bottom:24px;transform:translateX(-50%);display:flex;flex-direction:column;align-items:center;color:var(--muted);font-size:.72rem}.scroll-cue i{width:1px;height:36px;margin-top:8px;background:linear-gradient(var(--cyan),transparent);animation:scroll 1.7s infinite}@keyframes scroll{0%{transform:scaleY(0);transform-origin:top}50%{transform:scaleY(1)}100%{transform:scaleY(0);transform-origin:bottom}}
section{max-width:1200px;margin:auto;padding:115px 22px}.kicker{color:var(--cyan);font-size:.73rem;letter-spacing:.2em}.section-title{font-size:clamp(2.1rem,5vw,4rem);letter-spacing:-.045em;margin:13px 0 15px}.desc{max-width:760px;color:var(--muted);line-height:1.8}.grid{display:grid;grid-template-columns:repeat(2,1fr);gap:18px;margin-top:45px}.card{position:relative;min-height:260px;padding:28px;border:1px solid var(--line);border-radius:22px;background:linear-gradient(145deg,rgba(18,29,63,.82),rgba(9,15,34,.66));transition:.3s}.card:hover{transform:translateY(-6px);border-color:rgba(103,232,255,.42)}.card h3{font-size:1.75rem;margin-top:60px}.card p{color:var(--muted);line-height:1.7}.card a{color:var(--cyan);font-weight:700}.tag{position:absolute;top:26px;right:26px;padding:6px 9px;border:1px solid var(--line);border-radius:999px;color:var(--muted);font-size:.7rem}.split{display:grid;grid-template-columns:1fr 1fr;align-items:center;gap:70px}.network{position:relative;min-height:440px}.network .core{position:absolute;left:50%;top:50%;transform:translate(-50%,-50%);width:155px;height:155px;border-radius:50%;display:grid;place-items:center;font-size:2.4rem;font-weight:800;border:1px solid rgba(103,232,255,.48);background:radial-gradient(circle,rgba(103,232,255,.18),rgba(10,17,38,.9));box-shadow:0 0 80px rgba(103,232,255,.14)}.network:before,.network:after{content:"";position:absolute;border:1px solid rgba(103,232,255,.2);border-radius:50%;inset:10% 5%;transform:rotate(20deg)}.network:after{inset:20% 0;transform:rotate(-25deg)}.tokens{display:grid;grid-template-columns:1fr auto 1fr;gap:25px;align-items:center;margin-top:45px}.token{min-height:300px;padding:30px;border:1px solid var(--line);border-radius:22px;background:var(--panel)}.symbol{font-size:clamp(2.2rem,5vw,4rem);font-weight:800;letter-spacing:-.06em}.token p{color:var(--muted);line-height:1.7}.evolve{color:var(--muted);font-size:.7rem;letter-spacing:.12em}.new .symbol{background:linear-gradient(90deg,var(--cyan),var(--violet));-webkit-background-clip:text;color:transparent}
footer{max-width:1200px;margin:auto;padding:50px 22px;border-top:1px solid var(--line);display:flex;justify-content:space-between;gap:25px;color:var(--muted)}.reveal{opacity:0;transform:translateY(30px);transition:.75s ease}.reveal.show{opacity:1;transform:none}
@media(max-width:960px){.nav{display:none;position:fixed;top:74px;left:15px;right:15px;flex-direction:column;padding:14px;background:#080e20;border:1px solid var(--line);border-radius:15px}.nav.open{display:flex}.nav a{padding:11px}.menu{display:block;margin-left:auto}.brand span:last-child{display:none}.grid,.split{grid-template-columns:1fr}.tokens{grid-template-columns:1fr}.evolve{text-align:center}.network{order:2}}
@media(max-width:620px){.site-header{height:66px;padding:0 14px;gap:10px}.hero{padding:105px 18px 120px;align-items:flex-end}.hero-video{object-position:65% center}h1{font-size:clamp(3.2rem,19vw,5.3rem)}section{padding:85px 18px}.grid{grid-template-columns:1fr}.card{padding:23px}.lang-links a{padding:7px 8px;font-size:.7rem}footer{flex-direction:column}}
@media(prefers-reduced-motion:reduce){*{animation-duration:.001ms!important;transition-duration:.001ms!important;scroll-behavior:auto!important}.hero-video{display:none}.hero{background:radial-gradient(circle at 70% 40%,rgba(60,115,255,.24),transparent 35%),#030611}}


/* V3 cinematic hero */
#warpCanvas{position:absolute;inset:0;width:100%;height:100%;z-index:-5}
.hero-video{opacity:0;transition:opacity 1.2s ease;filter:saturate(1.12) contrast(1.08)}
.hero-video.ready{opacity:.72}
.hero:after{
  content:"";position:absolute;z-index:-1;inset:-15%;
  background:
    radial-gradient(circle at 74% 42%,rgba(75,148,255,.28),transparent 16%),
    radial-gradient(circle at 79% 45%,rgba(0,0,0,.9) 0 8%,transparent 8.5%),
    radial-gradient(ellipse at 62% 45%,transparent 0 22%,rgba(104,232,255,.08) 23%,transparent 31%);
  pointer-events:none;
  animation:heroPulse 7s ease-in-out infinite;
}
.hero-flare{
  position:absolute;right:8%;top:28%;z-index:-1;width:34vw;max-width:510px;aspect-ratio:1;
  border-radius:50%;background:radial-gradient(circle,rgba(255,255,255,.95) 0 1%,rgba(103,232,255,.35) 4%,rgba(91,98,255,.12) 18%,transparent 66%);
  filter:blur(1px);mix-blend-mode:screen;animation:flareDrift 8s ease-in-out infinite
}
.hero-rings{
  position:absolute;right:-5vw;top:48%;z-index:-1;width:min(68vw,940px);aspect-ratio:1.8;
  border:1px solid rgba(103,232,255,.17);border-radius:50%;transform:rotate(-14deg);
  box-shadow:0 0 70px rgba(103,232,255,.06)
}
.hero-rings:before,.hero-rings:after{content:"";position:absolute;border:1px solid rgba(156,115,255,.15);border-radius:50%}
.hero-rings:before{inset:10% 6%;transform:rotate(21deg)}.hero-rings:after{inset:22% 14%;transform:rotate(-18deg)}
.hero-content{animation:heroEnter .95s cubic-bezier(.2,.7,.2,1) both}
@keyframes heroEnter{from{opacity:0;transform:translateY(28px) scale(.985)}to{opacity:1;transform:none}}
@keyframes heroPulse{50%{transform:scale(1.025);opacity:.86}}
@keyframes flareDrift{50%{transform:translate(-18px,12px) scale(1.08)}}
@media(max-width:620px){
  .hero-flare{right:-26%;top:20%;width:90vw;opacity:.72}
  .hero-rings{right:-52vw;width:150vw}
  .hero-video.ready{opacity:.46}
}


/* ===== V4 interaction and animated LDU network ===== */
.network{
  overflow:hidden;
  isolation:isolate;
  border-radius:28px;
  background:
    radial-gradient(circle at 50% 50%,rgba(61,190,255,.09),transparent 26%),
    linear-gradient(145deg,rgba(9,16,36,.38),rgba(3,7,18,.08));
}
.network:before,.network:after{display:none}
.ldu-network-canvas{
  position:absolute;
  inset:0;
  width:100%;
  height:100%;
  z-index:1;
}
.network .core{
  z-index:3;
  overflow:hidden;
  animation:coreFloat 4.8s ease-in-out infinite,corePulse 2.8s ease-in-out infinite;
}
.network .core:before{
  content:"";
  position:absolute;
  inset:-35%;
  background:conic-gradient(from 0deg,transparent,rgba(103,232,255,.28),transparent 35%,rgba(156,115,255,.22),transparent 72%);
  animation:coreSpin 7s linear infinite;
}
.network .core:after{
  content:"LDU";
  position:absolute;
  inset:10px;
  display:grid;
  place-items:center;
  border-radius:50%;
  background:radial-gradient(circle at 35% 30%,rgba(40,73,111,.95),rgba(7,14,31,.97) 68%);
  border:1px solid rgba(103,232,255,.34);
  box-shadow:inset 0 0 35px rgba(103,232,255,.12);
  color:#f7f9ff;
}
.network .core{font-size:0}
.network-scan{
  position:absolute;
  z-index:2;
  left:50%;
  top:50%;
  width:72%;
  aspect-ratio:1;
  transform:translate(-50%,-50%);
  border-radius:50%;
  background:conic-gradient(from 0deg,rgba(103,232,255,.12),transparent 18%,transparent 100%);
  mask-image:radial-gradient(circle,transparent 0 22%,#000 23% 62%,transparent 63%);
  animation:networkScan 5.5s linear infinite;
  pointer-events:none;
}
.network-label{
  position:absolute;
  z-index:4;
  left:50%;
  bottom:26px;
  transform:translateX(-50%);
  color:rgba(175,215,255,.58);
  font-size:.64rem;
  letter-spacing:.24em;
  white-space:nowrap;
}
@keyframes coreSpin{to{transform:rotate(360deg)}}
@keyframes coreFloat{50%{transform:translate(-50%,calc(-50% - 9px))}}
@keyframes corePulse{50%{box-shadow:0 0 105px rgba(103,232,255,.25),0 0 30px rgba(156,115,255,.18)}}
@keyframes networkScan{to{transform:translate(-50%,-50%) rotate(360deg)}}

/* Every interactive control rises on hover */
.btn,.nav a,.lang-links a,.card a,.scroll-cue,.brand,.menu{
  transition:transform .24s cubic-bezier(.2,.7,.2,1),box-shadow .24s ease,border-color .24s ease,color .24s ease,background-color .24s ease;
  will-change:transform;
}
.btn:hover,.nav a:hover,.lang-links a:hover,.card a:hover,.scroll-cue:hover,.brand:hover,.menu:hover{
  transform:translateY(-4px);
}
.btn:hover{
  box-shadow:0 16px 46px rgba(65,202,255,.24);
}
.nav a:hover,.lang-links a:hover,.card a:hover{
  text-shadow:0 0 18px rgba(103,232,255,.42);
}
.btn:active,.nav a:active,.lang-links a:active,.card a:active,.menu:active{
  transform:translateY(-1px) scale(.98);
}

/* Click ripple on non-interactive blank areas */
.page-ripple{
  position:fixed;
  z-index:9999;
  width:10px;
  height:10px;
  border-radius:50%;
  pointer-events:none;
  transform:translate(-50%,-50%) scale(0);
  border:1px solid rgba(135,232,255,.72);
  background:radial-gradient(circle,rgba(103,232,255,.16),rgba(103,232,255,.05) 38%,transparent 68%);
  box-shadow:0 0 14px rgba(103,232,255,.26);
  animation:pageRipple .52s cubic-bezier(.15,.65,.2,1) forwards;
}
.page-ripple.ripple-secondary{
  animation-delay:.045s;
  opacity:.36;
}
@keyframes pageRipple{
  0%{transform:translate(-50%,-50%) scale(.12);opacity:.75}
  72%{opacity:.24}
  100%{transform:translate(-50%,-50%) scale(4.2);opacity:0}
}
  72%{opacity:.42}
  100%{transform:translate(-50%,-50%) scale(9);opacity:0}
}

@media(max-width:620px){
  .network{min-height:380px}
  .network .core{width:132px;height:132px}
  .network-label{bottom:18px;font-size:.55rem}
}
@media(prefers-reduced-motion:reduce){
  .network .core,.network .core:before,.network-scan{animation:none!important}
  .page-ripple{display:none}
}


/* V5 three-stage evolution */
.tokens.three-stage{
  grid-template-columns:1fr auto 1fr auto 1fr;
}
.chain-stage{
  border-color:rgba(103,232,255,.38);
  background:
    radial-gradient(circle at 75% 20%,rgba(103,232,255,.12),transparent 30%),
    linear-gradient(145deg,rgba(15,30,60,.85),rgba(7,14,31,.78));
  box-shadow:0 0 72px rgba(103,232,255,.08);
}
.chain-stage .symbol{
  background:linear-gradient(90deg,#fff,var(--cyan),var(--violet));
  -webkit-background-clip:text;
  color:transparent;
}
.chain-stage .mini-chain{
  margin-top:28px;
  display:flex;
  align-items:center;
  gap:7px;
}
.chain-stage .mini-chain i{
  width:8px;height:8px;border-radius:50%;
  background:var(--cyan);
  box-shadow:0 0 12px rgba(103,232,255,.8);
}
.chain-stage .mini-chain span{
  height:1px;flex:1;
  background:linear-gradient(90deg,rgba(103,232,255,.25),rgba(156,115,255,.5));
}
@media(max-width:1100px){
  .tokens.three-stage{grid-template-columns:1fr}
  .tokens.three-stage .evolve{transform:rotate(90deg);padding:2px 0}
}

/* Placeholder page return button hover */
.return-home{
  display:inline-flex!important;
  align-items:center;
  justify-content:center;
  min-height:46px;
  padding:0 18px;
  border:1px solid rgba(126,170,255,.22);
  border-radius:12px;
  background:rgba(255,255,255,.035);
  color:#67e8ff!important;
  font-weight:700;
  transition:transform .24s cubic-bezier(.2,.7,.2,1),box-shadow .24s ease,border-color .24s ease,background .24s ease;
}
.return-home:hover{
  transform:translateY(-4px);
  border-color:rgba(103,232,255,.48);
  background:rgba(103,232,255,.065);
  box-shadow:0 14px 38px rgba(65,202,255,.16);
}
.return-home:active{
  transform:translateY(-1px) scale(.98);
}


/* V6 balanced evolution layout */
.tokens.three-stage{
  grid-template-columns:minmax(0,1fr) 56px minmax(0,1fr) 56px minmax(0,1fr);
  align-items:stretch;
  gap:18px;
}
.tokens.three-stage .token{
  min-height:360px;
  height:100%;
  display:flex;
  flex-direction:column;
  justify-content:flex-start;
}
.tokens.three-stage .token h3{
  margin:46px 0 12px;
}
.tokens.three-stage .token p{
  margin-bottom:0;
}
.tokens.three-stage .chain-stage{
  min-height:360px;
  border-radius:22px;
}
.tokens.three-stage .chain-stage .symbol{
  font-size:clamp(2rem,4vw,3.4rem);
  line-height:1.05;
}
.tokens.three-stage .mini-chain{
  margin-top:auto;
  padding-top:34px;
}
.tokens.three-stage .evolve{
  align-self:center;
  justify-self:center;
  text-align:center;
  writing-mode:horizontal-tb;
  transform:none;
  line-height:1.35;
}
.tokens.three-stage .evolve::after{
  content:"";
  display:block;
  width:34px;
  height:1px;
  margin:10px auto 0;
  background:linear-gradient(90deg,transparent,var(--cyan),transparent);
}
@media(max-width:1100px){
  .tokens.three-stage{
    grid-template-columns:1fr;
  }
  .tokens.three-stage .evolve{
    transform:none;
    padding:4px 0;
  }
  .tokens.three-stage .token,
  .tokens.three-stage .chain-stage{
    min-height:300px;
  }
}


/* ===== V7 typography and layout refinement ===== */

/* Hero title: smaller, more balanced, less dominant */
.hero-content{
  max-width:680px;
}
.hero h1{
  font-size:clamp(3.1rem,7.2vw,6.5rem);
  line-height:.86;
  letter-spacing:-.055em;
  max-width:720px;
}
.hero .lead{
  max-width:560px;
}
@media(min-width:1400px){
  .hero h1{
    font-size:6.15rem;
  }
}
@media(max-width:900px){
  .hero h1{
    font-size:clamp(3.1rem,11vw,5.4rem);
  }
}
@media(max-width:620px){
  .hero h1{
    font-size:clamp(2.8rem,16vw,4.5rem);
    line-height:.9;
  }
  .hero-content{
    max-width:100%;
  }
}

/* Token evolution cards: prevent oversized text and wrapping */
.tokens.three-stage{
  grid-template-columns:minmax(0,1fr) 44px minmax(0,1fr) 44px minmax(0,1fr);
  gap:16px;
}
.tokens.three-stage .token{
  min-width:0;
  padding:30px 28px;
}
.tokens.three-stage .symbol{
  font-size:clamp(2.25rem,3.1vw,4.05rem);
  line-height:.98;
  letter-spacing:-.055em;
  white-space:nowrap;
}
.tokens.three-stage .chain-stage .symbol{
  font-size:clamp(2rem,2.8vw,3.5rem);
  white-space:normal;
  max-width:100%;
}
.tokens.three-stage .token h3{
  font-size:clamp(1.08rem,1.25vw,1.35rem);
  line-height:1.45;
  margin:44px 0 12px;
  max-width:100%;
}
.tokens.three-stage .token p{
  font-size:clamp(.92rem,1vw,1.02rem);
  line-height:1.8;
}
.tokens.three-stage .evolve{
  font-size:.62rem;
  letter-spacing:.13em;
}
@media(max-width:1280px){
  .tokens.three-stage .symbol{
    font-size:clamp(2rem,3vw,3.25rem);
  }
  .tokens.three-stage .chain-stage .symbol{
    font-size:clamp(1.9rem,2.7vw,3rem);
  }
  .tokens.three-stage .token{
    padding:26px 24px;
  }
}
@media(max-width:1100px){
  .tokens.three-stage{
    grid-template-columns:1fr;
    max-width:760px;
    margin-left:auto;
    margin-right:auto;
  }
  .tokens.three-stage .token{
    min-height:280px;
  }
  .tokens.three-stage .symbol,
  .tokens.three-stage .chain-stage .symbol{
    font-size:clamp(2.4rem,8vw,4rem);
    white-space:normal;
  }
  .tokens.three-stage .evolve::before{
    content:"↓";
    display:block;
    margin-bottom:6px;
    color:var(--cyan);
  }
}

/* Improve spacing around token section on wide screens */
#tokens{
  max-width:1320px;
}


/* V8 official LDU brand icon */
.brand-logo{
  padding:0;
  overflow:hidden;
  background:#050816;
  box-shadow:
    0 0 22px rgba(67,204,255,.18),
    inset 0 0 18px rgba(103,232,255,.08);
}
.brand-logo img{
  display:block;
  width:100%;
  height:100%;
  object-fit:cover;
  border-radius:11px;
  transform:scale(1.035);
}
.brand:hover .brand-logo{
  box-shadow:
    0 8px 28px rgba(67,204,255,.28),
    0 0 30px rgba(156,115,255,.12);
}