:root{
  --ink:#0d0a07;
  --ink-2:#14100b;
  --panel:#1a130d;
  --line:rgba(201,168,106,.26);
  --gold:#c9a86a;
  --gold-soft:#e2c896;
  --cinnabar:#a8382a;
  --cinnabar-hi:#c74a36;
  --paper:#ece2c8;
  --dim:#9b8d6f;
  --font-title:"Ma Shan Zheng","KaiTi","STKaiti","SimSun",serif;
  --font-xing:"Zhi Mang Xing","KaiTi","STKaiti","SimSun",serif;
  --font-body:"Noto Serif SC","Songti SC","SimSun",serif;
}
*{margin:0;padding:0;box-sizing:border-box}
html{scroll-behavior:smooth;scroll-padding-top:76px}
body{
  font-family:var(--font-body);
  background:var(--ink);
  color:var(--paper);
  line-height:1.75;
  overflow-x:hidden;
  -webkit-font-smoothing:antialiased;
}
img{display:block;max-width:100%}
a{color:inherit;text-decoration:none}
button{font-family:inherit;cursor:pointer}
:focus-visible{outline:2px solid var(--gold);outline-offset:2px}
::selection{background:rgba(200,74,54,.5);color:#fff}
.grain{
  position:fixed;inset:0;z-index:90;pointer-events:none;opacity:.055;
  mix-blend-mode:overlay;
  background-image:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='200' height='200'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.85' numOctaves='2' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)'/%3E%3C/svg%3E");
}
.section{position:relative;padding:72px 20px}
.wrap{max-width:1120px;margin:0 auto}
.eyebrow{
  display:inline-block;font-size:13px;letter-spacing:.42em;color:var(--gold);
  border:1px solid var(--line);border-radius:2px;padding:5px 14px 4px;
  margin-bottom:18px;
}
h2.sec-title{
  font-family:var(--font-title);font-weight:400;font-size:clamp(30px,5.2vw,46px);
  color:var(--paper);line-height:1.3;margin-bottom:14px;
}
.sec-desc{color:var(--dim);font-size:15px;max-width:560px}
.sec-head{margin-bottom:44px}
.reveal{opacity:0;transform:translateY(26px);transition:opacity .7s cubic-bezier(.22,1,.36,1),transform .7s cubic-bezier(.22,1,.36,1)}
.reveal.in{opacity:1;transform:none}
.nav{
  position:fixed;top:0;left:0;right:0;z-index:80;
  display:flex;align-items:center;justify-content:space-between;gap:12px;
  padding:0 20px;height:64px;
  background:linear-gradient(180deg,rgba(13,10,7,.92),rgba(13,10,7,.55));
  border-bottom:1px solid transparent;
  transition:background .35s,border-color .35s;
}
.nav.scrolled{background:rgba(13,10,7,.96);border-bottom-color:var(--line)}
.brand{display:flex;align-items:center;gap:10px;min-width:0}
.brand svg{flex:none}
.brand-name{font-family:var(--font-title);font-size:24px;color:var(--paper);letter-spacing:.1em;white-space:nowrap}
.nav-links{display:none;gap:34px}
.nav-links a{font-size:15px;color:var(--dim);letter-spacing:.14em;position:relative;transition:color .25s}
.nav-links a::after{content:"";position:absolute;left:50%;bottom:-6px;width:0;height:1px;background:var(--gold);transition:all .3s}
.nav-links a:hover,.nav-links a:focus{color:var(--gold-soft)}
.nav-links a:hover::after{left:0;width:100%}
.nav-cta{
  display:none;font-size:14px;letter-spacing:.18em;color:#0d0a07;
  background:var(--gold);padding:9px 18px;border-radius:2px;font-weight:600;
  transition:background .25s;
}
.nav-cta:hover{background:var(--gold-soft)}
.nav-toggle{
  display:flex;flex-direction:column;justify-content:center;gap:5px;
  width:44px;height:44px;background:none;border:1px solid var(--line);border-radius:2px;
  padding:0 10px;margin:0 -4px 0 4px;
}
.nav-toggle span{display:block;height:1.5px;background:var(--gold);transition:transform .3s,opacity .3s}
.nav-toggle[aria-expanded="true"] span:nth-child(1){transform:translateY(6.5px) rotate(45deg)}
.nav-toggle[aria-expanded="true"] span:nth-child(2){opacity:0}
.nav-toggle[aria-expanded="true"] span:nth-child(3){transform:translateY(-6.5px) rotate(-45deg)}
.menu{
  display:none;position:fixed;top:64px;left:0;right:0;z-index:79;
  background:rgba(13,10,7,.98);border-bottom:1px solid var(--line);
  padding:10px 20px 18px;flex-direction:column;gap:2px;
}
.menu.open{display:flex}
.menu a{font-size:16px;letter-spacing:.2em;color:var(--paper);padding:13px 4px;border-bottom:1px dashed rgba(201,168,106,.15)}
.menu a:last-child{border-bottom:none}
.menu a:hover{color:var(--gold-soft)}
.hero{
  position:relative;min-height:100svh;display:flex;align-items:center;justify-content:center;
  overflow:hidden;padding:96px 20px 72px;text-align:center;
}
.hero-bg{position:absolute;inset:0;width:100%;height:100%;object-fit:cover;object-position:center 30%}
.hero-mask{
  position:absolute;inset:0;
  background:
    radial-gradient(120% 90% at 50% 42%,rgba(13,10,7,.25) 0%,rgba(13,10,7,.62) 62%,rgba(13,10,7,.92) 100%),
    linear-gradient(180deg,rgba(13,10,7,.55) 0%,transparent 30%,transparent 62%,var(--ink) 100%);
}
.hero-inner{position:relative;z-index:2;max-width:900px}
.hero-tagline{
  display:none;position:absolute;left:max(24px,calc((100vw - 1120px)/2 - 92px));top:50%;
  transform:translateY(-50%);
  writing-mode:vertical-rl;letter-spacing:.62em;text-indent:.62em;
  font-family:var(--font-xing);font-size:24px;color:rgba(226,200,150,.8);
  border-right:1px solid rgba(201,168,106,.35);padding-right:14px;
}
.hero-title{
  font-family:var(--font-title);font-weight:400;color:var(--paper);
  font-size:clamp(64px,17vw,176px);line-height:1.05;letter-spacing:.06em;
  text-shadow:0 6px 40px rgba(0,0,0,.65),0 0 90px rgba(201,168,106,.12);
  position:relative;animation:titleUp 1.1s cubic-bezier(.22,1,.36,1) both;
}
@keyframes titleUp{from{opacity:0;transform:translateY(34px)}to{opacity:1;transform:none}}
.hero-title::after{
  content:"";position:absolute;top:6%;left:50%;width:1px;height:88%;
  background:linear-gradient(180deg,transparent,rgba(226,200,150,.85),transparent);
  filter:drop-shadow(0 0 8px rgba(226,200,150,.8));
  animation:bladeSweep 5.5s ease-in-out 1.2s infinite;
}
@keyframes bladeSweep{
  0%{transform:translateX(-46vw) rotate(18deg);opacity:0}
  12%{opacity:1}
  46%{transform:translateX(46vw) rotate(-14deg);opacity:0}
  100%{transform:translateX(46vw) rotate(-14deg);opacity:0}
}
.hero-sub{
  margin-top:14px;font-size:clamp(15px,2.6vw,19px);color:var(--gold-soft);
  letter-spacing:.34em;text-indent:.34em;opacity:0;
  animation:titleUp .9s cubic-bezier(.22,1,.36,1) .35s both;
}
.hero-actions{
  margin-top:38px;display:flex;flex-direction:column;gap:14px;align-items:center;justify-content:center;
  opacity:0;animation:titleUp .9s cubic-bezier(.22,1,.36,1) .5s both;
}
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:10px;
  min-height:48px;padding:0 34px;font-size:16px;letter-spacing:.22em;text-indent:.22em;
  border-radius:2px;border:1px solid transparent;transition:all .25s;white-space:nowrap;
}
.btn svg{flex:none}
.btn-seal{background:var(--cinnabar);color:#f5ead2;border-color:#8f2e22;box-shadow:0 8px 26px rgba(168,56,42,.35)}
.btn-seal:hover{background:var(--cinnabar-hi);transform:translateY(-2px)}
.btn-ghost{background:rgba(20,15,11,.42);color:var(--gold-soft);border-color:var(--line);backdrop-filter:blur(4px)}
.btn-ghost:hover{border-color:var(--gold);color:var(--paper);transform:translateY(-2px)}
.hero-meta{
  margin-top:26px;font-size:13px;color:var(--dim);letter-spacing:.12em;
  opacity:0;animation:titleUp .9s cubic-bezier(.22,1,.36,1) .65s both;
}
.hero-meta a{color:var(--gold);border-bottom:1px solid rgba(201,168,106,.4);transition:color .25s}
.hero-meta a:hover{color:var(--gold-soft)}
.hero-scroll{
  position:absolute;left:50%;bottom:26px;transform:translateX(-50%);z-index:2;
  width:1px;height:44px;overflow:hidden;opacity:0;animation:titleUp 1s .9s both;
}
.hero-scroll::after{
  content:"";display:block;width:1px;height:44px;background:linear-gradient(180deg,var(--gold),transparent);
  animation:scrollDrop 2s ease-in-out infinite;
}
@keyframes scrollDrop{0%{transform:translateY(-44px)}55%,100%{transform:translateY(44px)}}
.features{background:linear-gradient(180deg,var(--ink) 0%,var(--ink-2) 50%,var(--ink) 100%)}
.feature-grid{display:grid;grid-template-columns:1fr;gap:18px}
.f-card{
  position:relative;background:linear-gradient(165deg,rgba(26,19,13,.9),rgba(20,14,10,.9));
  border:1px solid var(--line);border-radius:3px;padding:30px 26px 26px;overflow:hidden;
  transition:border-color .3s,transform .3s;
}
.f-card::before{
  content:"";position:absolute;top:0;left:0;right:0;height:2px;
  background:linear-gradient(90deg,transparent,var(--cinnabar),transparent);
  opacity:0;transition:opacity .3s;
}
.f-card:hover{border-color:rgba(201,168,106,.5);transform:translateY(-4px)}
.f-card:hover::before{opacity:1}
.f-top{display:flex;align-items:center;justify-content:space-between;margin-bottom:20px}
.f-no{font-family:var(--font-title);font-size:34px;color:rgba(201,168,106,.32)}
.f-ic{width:48px;height:48px;color:var(--gold)}
.f-card h3{font-family:var(--font-title);font-weight:400;font-size:25px;letter-spacing:.1em;margin-bottom:10px;color:var(--paper)}
.f-card p{font-size:14px;color:var(--dim)}
.download{background:var(--ink)}
.dl-grid{display:grid;grid-template-columns:1fr;gap:22px}
.dl-card{
  position:relative;display:flex;flex-direction:column;align-items:center;text-align:center;
  background:linear-gradient(170deg,#1c140d,#120d09);
  border:1px solid var(--line);border-radius:3px;padding:42px 26px 36px;overflow:hidden;
  transition:border-color .3s,transform .3s;
}
.dl-card:hover{border-color:rgba(201,168,106,.55);transform:translateY(-4px)}
.dl-card::after{
  content:"";position:absolute;inset:auto -20% -34% -20%;height:60%;
  background:radial-gradient(closest-side,rgba(168,56,42,.22),transparent);
  pointer-events: none;
}
.dl-ic{width:62px;height:62px;color:var(--gold);margin-bottom:18px}
.dl-card h3{font-family:var(--font-title);font-weight:400;font-size:28px;letter-spacing:.12em;color:var(--paper)}
.dl-platform{font-size:13px;color:var(--gold);letter-spacing:.3em;margin-top:4px}
.dl-file{
  margin:20px 0 6px;font-size:15px;color:var(--gold-soft);letter-spacing:.08em;
  border:1px dashed rgba(201,168,106,.4);border-radius:2px;padding:9px 20px;background:rgba(201,168,106,.05);
}
.dl-desc{font-size:14px;color:var(--dim);margin:12px 0 26px}
.dl-btn{
  position:relative;
  z-index:2;
  width:min(320px,86%)
}
.dl-note{margin-top:30px;text-align:center;font-size:13px;color:var(--dim);letter-spacing:.06em}
.dl-note a{color:var(--gold)}
.join{position:relative;overflow:hidden;padding:96px 20px;text-align:center}
.join-bg{position:absolute;inset:0;width:100%;height:100%;object-fit:cover;object-position:center 42%}
.join-mask{position:absolute;inset:0;background:linear-gradient(180deg,var(--ink) 0%,rgba(13,10,7,.68) 30%,rgba(13,10,7,.68) 70%,var(--ink) 100%)}
.join-inner{position:relative;z-index:2}
.join .eyebrow{margin-bottom:20px}
.join h2{font-family:var(--font-title);font-weight:400;font-size:clamp(34px,6vw,54px);color:var(--paper);margin-bottom:14px}
.join-desc{color:var(--dim);font-size:15px;max-width:520px;margin:0 auto 26px}
.join-num{
  font-family:var(--font-title);font-size:clamp(46px,9vw,72px);color:var(--gold-soft);
  letter-spacing:.2em;text-indent:.2em;line-height:1.2;margin-bottom:6px;
  text-shadow:0 0 40px rgba(201,168,106,.25);
}
.join-num small{font-family:var(--font-body);font-size:15px;letter-spacing:.3em;color:var(--dim);display:block;margin-bottom:8px}
.join-actions{display:flex;flex-direction:column;gap:14px;align-items:center;justify-content:center;margin-top:26px}
.join-actions .btn{width:min(340px,88%)}
.footer{
  border-top:1px solid var(--line);padding:34px 20px 44px;text-align:center;
  background:var(--ink);font-size:13px;color:var(--dim);letter-spacing:.08em;
}
.footer .brand-name{font-size:20px;margin-bottom:12px}
.footer .brand{justify-content:center;margin-bottom:10px}
.footer-line{margin-bottom:6px}
.footer-line a{color:var(--gold)}
.footer small{color:rgba(155,141,111,.75)}
.toast{
  position:fixed;left:50%;bottom:34px;transform:translate(-50%,80px);z-index:100;
  background:rgba(20,15,11,.96);border:1px solid var(--gold);border-radius:2px;
  color:var(--gold-soft);font-size:14px;letter-spacing:.1em;padding:12px 26px;
  opacity:0;pointer-events:none;transition:all .35s cubic-bezier(.22,1,.36,1);
}
.toast.show{opacity:1;transform:translate(-50%,0)}
@media (min-width:640px){
  .section{padding:88px 28px}
  .feature-grid{grid-template-columns:repeat(2,1fr);gap:20px}
  .dl-grid{grid-template-columns:repeat(2,1fr);gap:24px}
  .hero-actions{flex-direction:row;gap:20px}
  .join-actions{flex-direction:row;gap:20px}
  .join-actions .btn{width:auto}
}
@media (min-width:860px){
  .nav-links{display:flex}
  .nav-cta{display:inline-flex;align-items:center;justify-content:center}
  .nav-toggle{display:none}
  .menu{display:none!important}
}
@media (min-width:1024px){
  .feature-grid{grid-template-columns:repeat(4,1fr)}
  .hero-tagline{display:block}
}
@media (prefers-reduced-motion:reduce){
  html{scroll-behavior:auto}
  *,*::before,*::after{animation:none!important;transition:none!important}
  .reveal{opacity:1;transform:none}
  .hero-title,.hero-sub,.hero-actions,.hero-meta,.hero-scroll{opacity:1}
}