:root{
  --bg:#05060a; --bg2:#0a0a14; --bg3:#101022;
  --txt:#ffffff; --txt2:rgba(255,255,255,.72); --txt3:rgba(255,255,255,.42);
  --line:rgba(255,255,255,.1);
  --violet:#8B5CF6; --violet2:#7C3AED; --cyan:#22D3EE; --cyan2:#06B6D4;
  --coral:#FF6B6B; --purple:#9B59B6; --green:#6BCB77; --pink:#FF6B9D; --yellow:#FFD93D;
  --brand:linear-gradient(135deg,var(--violet),var(--cyan));
  --brand-text:linear-gradient(90deg,var(--violet),var(--cyan),var(--violet));
  --glow:0 0 26px rgba(139,92,246,.45),0 0 52px rgba(34,211,238,.22);
  --r:18px;
}
*{margin:0;padding:0;box-sizing:border-box}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%}
body{
  background:var(--bg); color:var(--txt);
  font-family:-apple-system,BlinkMacSystemFont,"PingFang SC","Microsoft YaHei",sans-serif;
  line-height:1.65; overflow-x:hidden;
}
body::before{content:"";position:fixed;inset:0;background:radial-gradient(ellipse at 50% 0%,rgba(139,92,246,.08) 0%,rgba(34,211,238,.04) 35%,transparent 65%);pointer-events:none;z-index:-1}
a{color:inherit;text-decoration:none}
.wrap{max-width:1120px;margin:0 auto;padding:0 22px}
.no-select{
  -webkit-user-select:none;-moz-user-select:none;-ms-user-select:none;user-select:none;
  -webkit-touch-callout:none;-webkit-tap-highlight-color:transparent
}

/* ---------- premium english ---------- */
.en{
  font-family:"Orbitron","Exo 2",Rajdhani,-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,sans-serif;
  text-transform:uppercase;letter-spacing:.32em;font-weight:600;font-size:11px;
  color:var(--violet);
  text-shadow:0 0 18px rgba(139,92,246,.35);
}

/* ---------- nav ---------- */
nav{position:sticky;top:0;z-index:50;backdrop-filter:blur(16px);
  background:rgba(5,6,10,.72);border-bottom:1px solid var(--line)}
.nav-in{display:flex;align-items:center;justify-content:space-between;height:64px}
.logo{display:flex;align-items:center;gap:10px;font-weight:800;font-size:18px}
.logo .brand-en{font-family:"Orbitron","Exo 2",sans-serif;font-size:18px;letter-spacing:.06em;font-weight:900;
  background:var(--brand-text);background-size:200% 200%;-webkit-background-clip:text;background-clip:text;color:transparent;
  animation:flow 5s ease infinite;text-shadow:none}
.logo .brand-divider{color:var(--txt3);font-weight:400;margin:0 4px}
.logo .brand-cn{font-weight:700;letter-spacing:.08em;color:var(--txt)}
.logo .star{width:28px;height:28px;border-radius:8px;background:var(--brand);
  display:flex;align-items:center;justify-content:center;color:#0a0a12;font-size:15px;
  box-shadow:var(--glow)}
.btn{border:none;cursor:pointer;font-family:inherit;font-weight:700;border-radius:999px;
  padding:12px 24px;font-size:14px;transition:transform .25s cubic-bezier(.22,1,.36,1),box-shadow .25s}
.btn-primary{background:var(--brand);color:#FFE45C;letter-spacing:.04em;
  text-shadow:0 0 14px rgba(255,217,61,.55), 0 1px 2px rgba(7,8,20,.45);
  box-shadow:0 8px 28px rgba(139,92,246,.38),inset 0 1px 0 rgba(255,255,255,.18)}
.btn-primary:hover{transform:scale(1.05);box-shadow:0 14px 40px rgba(139,92,246,.55),0 0 28px rgba(34,211,238,.18)}
.btn-ghost{background:transparent;color:var(--txt);border:1px solid rgba(139,92,246,.45)}
.btn-ghost:hover{border-color:var(--violet);box-shadow:0 0 22px rgba(139,92,246,.22);transform:scale(1.03)}
.btn-large{font-size:18px!important;font-weight:800!important;letter-spacing:.04em!important;text-transform:none!important;color:inherit!important;
  font-family:"PingFang SC","Microsoft YaHei","Hiragino Sans GB","Source Han Sans SC",-apple-system,BlinkMacSystemFont,sans-serif!important}
.btn-large .arrow{font-weight:400!important;margin-left:6px;display:inline-block;transform:translateY(-1px)}
.nav-toggle{display:none;background:none;border:none;color:#fff;font-size:24px;cursor:pointer}
.nav-links{display:flex;gap:26px;align-items:center}
.nav-links a{font-size:14px;color:var(--txt2);transition:color .2s}
.nav-links a:hover{color:#fff}
/* ---------- hero ---------- */
.hero{position:relative;min-height:100vh;display:flex;flex-direction:column;overflow:hidden;padding:96px 0 90px}
.hero-glow{position:absolute;top:12%;left:50%;width:460px;height:460px;max-width:92vw;max-height:92vw;
  transform:translateX(-50%);border-radius:50%;
  background:radial-gradient(circle,rgba(139,92,246,.22) 0%,rgba(34,211,238,.12) 35%,rgba(124,58,237,.08) 55%,transparent 72%);
  filter:blur(48px);animation:glow-breathe 6s ease-in-out infinite;pointer-events:none;z-index:0}
#starfield{position:absolute;inset:0;z-index:0;pointer-events:none}
#starfield::before{content:"";position:absolute;inset:0;
  background:
    radial-gradient(1px 1px at 18% 28%,#fff,transparent),
    radial-gradient(1px 1px at 72% 18%,#fff,transparent),
    radial-gradient(1px 1px at 42% 72%,#fff,transparent),
    radial-gradient(1px 1px at 86% 58%,#fff,transparent),
    radial-gradient(1px 1px at 56% 42%,#fff,transparent),
    radial-gradient(1px 1px at 12% 82%,#fff,transparent),
    radial-gradient(1px 1px at 92% 34%,#fff,transparent);
  opacity:.45}
.hero-in{position:relative;z-index:2;display:block;width:100%;max-width:780px;margin:0 auto;text-align:center}
.hero .eyebrow{margin-bottom:22px;display:inline-block}
.hero .eyebrow .en{padding:6px 16px;border:1px solid rgba(139,92,246,.38);border-radius:999px;background:rgba(139,92,246,.08)}
.hero h1{font-size:clamp(34px,6vw,66px);font-weight:800;line-height:1.1;letter-spacing:-1px}
.gradient-text{
  background:var(--brand-text);background-size:200% 200%;
  -webkit-background-clip:text;background-clip:text;color:transparent;
  animation:flow 5s ease infinite;
}
@keyframes flow{0%{background-position:0 50%}50%{background-position:100% 50%}100%{background-position:0 50%}}
.hero .sub{font-size:clamp(15px,2.4vw,19px);color:var(--txt2);margin:22px auto 16px;max-width:34ch}
.trust-mini{display:flex;flex-wrap:wrap;gap:8px;margin-bottom:28px;justify-content:center}
.trust-mini span{font-size:14px;font-weight:600;color:#fff;background:rgba(139,92,246,.12);
  border:1px solid rgba(139,92,246,.42);padding:7px 13px;border-radius:999px;
  box-shadow:0 0 18px rgba(139,92,246,.2)}
.cta{display:flex;gap:14px;flex-wrap:wrap;justify-content:center}
.hero-galaxy{position:relative;z-index:2;display:flex;align-items:center;justify-content:center;margin-top:48px}

/* ---------- galaxy wheel (rotating, in hero) ---------- */
#galaxy-container{position:relative;width:400px;height:400px;max-width:86vw;max-height:86vw;
  cursor:grab;touch-action:pan-y}
#galaxy-container:active{cursor:grabbing}
#galaxy-rot{position:absolute;inset:0;transform-origin:center;will-change:transform}
.galaxy-center{position:absolute;top:50%;left:50%;width:36px;height:36px;margin:-18px 0 0 -18px;border-radius:50%;
  background:var(--brand);display:flex;align-items:center;justify-content:center;font-weight:800;
  color:#070814;box-shadow:var(--glow),inset 0 0 12px rgba(255,255,255,.35);z-index:10;font-size:12px}
@keyframes glow-breathe{0%,100%{transform:translateX(-50%) scale(1);opacity:.9}50%{transform:translateX(-50%) scale(1.08);opacity:1}}

/* ---------- scroll indicator ---------- */
.scroll-indicator{position:absolute;bottom:26px;left:50%;transform:translateX(-50%);z-index:3;
  display:flex;flex-direction:column;align-items:center;gap:10px;pointer-events:none}
.mouse{width:24px;height:38px;border:1.5px solid rgba(255,255,255,.45);border-radius:14px;
  display:flex;justify-content:center;padding-top:7px}
.mouse-dot{width:4px;height:7px;background:var(--violet);border-radius:2px;
  animation:scroll-wheel 1.6s ease-in-out infinite;box-shadow:0 0 8px var(--violet),0 0 14px var(--cyan)}
@keyframes scroll-wheel{0%{transform:translateY(0);opacity:1}60%{transform:translateY(10px);opacity:.3}100%{transform:translateY(0);opacity:1}}
.scroll-indicator .en{font-size:9.5px;letter-spacing:.35em;color:var(--txt3)}

/* ---------- section ---------- */
section{padding:90px 0;position:relative}
.sec-head{text-align:center;max-width:660px;margin:0 auto 50px}
.sec-head .en{margin-bottom:14px;display:block}
.sec-head h2{font-size:clamp(28px,4.5vw,44px);font-weight:800;line-height:1.18}
.sec-head p{color:var(--txt2);margin-top:14px;font-size:15px}
.reveal{opacity:0;transform:translateY(24px);transition:opacity .6s cubic-bezier(.22,1,.36,1),transform .6s cubic-bezier(.22,1,.36,1)}
.reveal.in{opacity:1;transform:none}

/* stats band */
.stats{display:grid;grid-template-columns:repeat(4,1fr);gap:16px;text-align:center}
.stat{padding:22px 14px;background:rgba(255,255,255,.03);border:1px solid var(--line);border-radius:var(--r)}
.stat .num{font-size:clamp(28px,4vw,40px);font-weight:800;background:var(--brand-text);-webkit-background-clip:text;background-clip:text;color:transparent}
.stat .lab{font-size:12px;color:var(--txt2);margin-top:6px;letter-spacing:.1em}

/* features */
.feat-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:18px}
.feat{position:relative;background:rgba(255,255,255,.03);border:1px solid var(--line);border-radius:var(--r);
  padding:28px 24px;overflow:hidden;transition:transform .3s cubic-bezier(.22,1,.36,1),border-color .3s,box-shadow .3s}
.feat::before{content:"";position:absolute;top:0;left:0;right:0;height:3px;background:var(--cg)}
.feat:hover{transform:translateY(-10px) scale(1.02);border-color:color-mix(in srgb,var(--cg) 50%,transparent);
  box-shadow:0 18px 40px color-mix(in srgb,var(--cg) 22%,transparent)}
.feat .ic{font-size:30px;margin-bottom:14px;filter:drop-shadow(0 0 10px color-mix(in srgb,var(--cg) 60%,transparent))}
.feat h3{font-size:19px;font-weight:700;margin-bottom:8px}
.feat p{font-size:14px;color:var(--txt2)}

/* showcase cool cards */
.cool-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:18px}
.cool{background:var(--bg3);border:1px solid var(--line);border-radius:var(--r);padding:26px 22px;
  text-align:center;transition:transform .3s cubic-bezier(.22,1,.36,1)}
.cool:hover{transform:scale(1.03)}
.cool .vis{height:120px;display:flex;align-items:center;justify-content:center;margin-bottom:16px;position:relative}
.cool h4{font-size:16px;font-weight:700;margin-bottom:6px}
.cool p{font-size:13px;color:var(--txt2)}

/* scenes */
.scene-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:18px}
.scene{position:relative;background:linear-gradient(180deg,rgba(255,255,255,.04),rgba(255,255,255,.02));
  border:1px solid var(--line);border-radius:var(--r);padding:26px 22px;overflow:hidden}
.scene::after{content:"";position:absolute;bottom:0;left:0;right:0;height:120px;background:linear-gradient(180deg,transparent,rgba(0,0,0,.6));pointer-events:none}
.scene .badge{display:inline-block;font-size:15px;font-weight:700;color:#fff;border:1px solid rgba(139,92,246,.5);
  padding:7px 15px;border-radius:999px;margin-bottom:14px;letter-spacing:.04em;background:rgba(139,92,246,.14);box-shadow:0 0 18px rgba(139,92,246,.22)}
.scene h3{font-size:22px;font-weight:800;margin-bottom:10px}
.scene p{font-size:14px;color:var(--txt2);line-height:1.7}
.scene .qt{position:absolute;right:18px;top:18px;font-size:42px;color:rgba(139,92,246,.16);font-family:serif;line-height:1}

/* testimonials */
.testi-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:18px}
.testi{background:rgba(255,255,255,.03);border:1px solid var(--line);border-radius:var(--r);padding:24px}
.testi .quote{font-size:15px;color:var(--txt2);line-height:1.7;margin-bottom:18px}
.testi .author{display:flex;align-items:center;gap:12px}
.testi .avatar{width:42px;height:42px;border-radius:50%;background:var(--brand);display:flex;align-items:center;justify-content:center;font-weight:700;color:#070814;font-size:14px;box-shadow:var(--glow)}
.testi .name{font-weight:700;font-size:14px}
.testi .role{font-size:12px;color:var(--txt3)}

/* position band */
.band{text-align:center;background:linear-gradient(180deg,rgba(139,92,246,.08),rgba(34,211,238,.05));
  border-top:1px solid var(--line);border-bottom:1px solid var(--line)}
.band .en{margin-bottom:16px;display:block}
.band h2{font-size:clamp(26px,4vw,40px);font-weight:800}
.band p{color:var(--txt2);margin-top:14px;font-size:15px}

/* trust bar */
.trust{display:flex;align-items:center;justify-content:center;gap:16px;flex-wrap:wrap;
  background:rgba(255,255,255,.04);border:1px solid var(--line);border-radius:999px;
  padding:18px 28px;max-width:780px;margin:0 auto;text-align:center}
.trust .en{font-size:10px;color:var(--violet);letter-spacing:.25em;border-bottom:1px solid rgba(139,92,246,.4);padding-bottom:2px}
.trust span{font-size:14px;color:var(--txt2)}
.trust b{color:#fff;font-weight:700}

/* download */
.dl{text-align:center}
.dl .en{margin-bottom:16px;display:block}
.dl h2{font-size:clamp(28px,4.5vw,44px);font-weight:800}
.dl p{color:var(--txt2);margin:14px 0 28px}
.dl-btns{display:flex;gap:14px;justify-content:center;flex-wrap:wrap}
.qr{width:210px;max-width:82%;margin:30px auto 0;padding:14px;border-radius:18px;border:1px solid var(--line);
  background:linear-gradient(160deg,#1c1f2b,#12141e);box-shadow:0 10px 30px rgba(0,0,0,.45)}
.qr .qr-svg{display:block;width:100%;height:auto;border-radius:10px;background:#fff}
.qr-cap{margin:12px 0 0;font-size:15px;line-height:1.5;font-weight:800;
  background:var(--brand-text);background-size:200% 200%;-webkit-background-clip:text;background-clip:text;color:transparent;
  animation:flow 5s ease infinite;text-shadow:0 0 16px rgba(139,92,246,.35)}
.qr-sub{display:block;font-size:12px;color:rgba(255,255,255,.55);font-weight:500;margin-top:2px}
.ls-ios-notice{margin:26px auto 0;max-width:560px;padding:18px 20px;border-radius:16px;text-align:left;
  background:rgba(139,92,246,.1);border:1px solid rgba(139,92,246,.35);color:var(--txt)}
.ls-ios-notice[hidden]{display:none}
.ls-ios-notice strong{display:block;font-size:16px;margin-bottom:6px;color:var(--cyan)}
.ls-ios-notice p{margin:0;font-size:14px;color:var(--txt2)}
.ls-ios-notice a{color:var(--violet);font-weight:600}
.dl-note{margin:22px auto 0;font-size:14px;color:var(--txt2);max-width:560px}
.dl-note b{color:var(--cyan)}
/* universe section */
.uni-grid{display:grid;grid-template-columns:1fr 1fr;gap:40px;align-items:center}
.uni-vis{position:relative;height:300px;display:flex;align-items:center;justify-content:center}
.uni-map{position:relative;width:240px;height:240px;border:1.5px dashed rgba(255,255,255,.16);border-radius:50%}
.uni-map .me{position:absolute;top:50%;left:50%;width:26px;height:26px;margin:-13px 0 0 -13px;border-radius:50%;background:var(--brand);box-shadow:var(--glow)}
.uni-disk{position:absolute;border:1.5px dashed rgba(139,92,246,.45);border-radius:50%;display:flex;align-items:center;justify-content:center}
.uni-disk.d1{width:96px;height:96px;top:8%;left:6%}
.uni-disk.d2{width:84px;height:84px;top:54%;left:30%}
.uni-disk.d3{width:74px;height:74px;top:14%;left:60%}
.uni-disk span{font-size:22px}
.uni-line{position:absolute;height:0;border-top:1px dashed rgba(255,255,255,.22);transform-origin:left center}
.uni-line.l1{left:120px;top:120px;width:78px;transform:rotate(222.5deg)}
.uni-line.l2{left:120px;top:120px;width:52px;transform:rotate(96.6deg)}
.uni-line.l3{left:120px;top:120px;width:78px;transform:rotate(-38.8deg)}
.uni-copy ul{list-style:none;display:flex;flex-direction:column;gap:15px}
.uni-copy li{display:flex;gap:12px;color:var(--txt2);font-size:15px;line-height:1.6}
.uni-copy li b{color:#fff;font-weight:700}
.uni-copy .k{flex:none;width:30px;height:30px;border-radius:50%;background:var(--brand);color:#0a0a12;font-weight:800;display:flex;align-items:center;justify-content:center;font-size:14px}
/* galaxy (universe section left visual) */
.galaxy{position:relative;width:100%;height:100%;border-radius:50%;overflow:hidden;
  background:radial-gradient(circle at 50% 46%, rgba(86,46,140,.55) 0%, rgba(46,32,96,.38) 34%, rgba(16,28,64,.28) 60%, rgba(5,6,10,0) 76%);
  box-shadow:inset 0 0 70px rgba(130,86,210,.28), 0 0 44px rgba(60,96,190,.16)}
.galaxy::before{content:"";position:absolute;top:50%;left:50%;width:220px;height:96px;margin:-48px 0 0 -110px;border-radius:50%;
  transform:rotate(-26deg);background:radial-gradient(ellipse at center, rgba(130,96,210,.20), transparent 70%);filter:blur(10px);pointer-events:none}
.gx-point{position:absolute;width:var(--s);height:var(--s);margin:calc(var(--s)/-2) 0 0 calc(var(--s)/-2);border-radius:50%;
  background:radial-gradient(circle at 30% 30%, var(--c), color-mix(in srgb,var(--c) 45%,transparent));
  box-shadow:0 0 8px var(--c),0 0 16px color-mix(in srgb,var(--c) 50%,transparent)}
.gx-line{position:absolute;height:1px;background:linear-gradient(90deg,var(--c),color-mix(in srgb,var(--c) 18%,transparent));transform-origin:left center;opacity:.55}
.galaxy .me{position:absolute;top:50%;left:50%;width:24px;height:24px;margin:-12px 0 0 -12px;border-radius:50%;
  background:var(--brand);box-shadow:var(--glow),inset 0 0 12px rgba(255,255,255,.35);z-index:5}
.galaxy .me::after{content:"你";position:absolute;inset:0;display:flex;align-items:center;justify-content:center;font-size:12px;font-weight:800;color:#0a0a12}

/* faq */
.faq-list{max-width:720px;margin:0 auto;display:flex;flex-direction:column;gap:12px}
.faq{background:rgba(255,255,255,.03);border:1px solid var(--line);border-radius:14px;overflow:hidden}
.faq-q{width:100%;display:flex;justify-content:space-between;align-items:center;padding:18px 20px;background:none;border:none;color:var(--txt);font-size:15px;font-weight:600;text-align:left;cursor:pointer}
.faq-q::after{content:"+";font-size:20px;color:var(--violet);transition:transform .25s;text-shadow:0 0 12px rgba(139,92,246,.5)}
.faq.open .faq-q::after{transform:rotate(45deg)}
.faq-a{max-height:0;overflow:hidden;transition:max-height .35s cubic-bezier(.22,1,.36,1)}
.faq-a div{padding:0 20px 18px;color:var(--txt2);font-size:14px;line-height:1.7}

/* footer */
footer{border-top:1px solid var(--line);padding:44px 0;background:var(--bg2)}
.foot-in{display:flex;justify-content:space-between;align-items:center;flex-wrap:wrap;gap:18px}
.foot-brand{font-weight:800;font-size:16px}
.foot-brand small{display:block;color:var(--txt3);font-weight:400;font-size:12px;margin-top:4px}
.foot-links{display:flex;gap:18px;flex-wrap:wrap}
.foot-links a{font-size:13px;color:var(--txt2)}
.foot-links a:hover{color:#fff}
.foot-copy{width:100%;color:var(--txt3);font-size:12px;text-align:center;margin-top:18px;
  border-top:1px solid var(--line);padding-top:16px}
.foot-copy .en{font-size:10px;color:var(--txt3);letter-spacing:.2em;margin-bottom:6px;display:block}

/* ---------- responsive ---------- */
@media (max-width:860px){
  .hero-in{grid-template-columns:1fr;text-align:center}
  .hero .eyebrow{margin-bottom:18px}
  .hero .sub{max-width:none;margin-left:auto;margin-right:auto}
  .trust-mini,.cta{justify-content:center}
  .hero-galaxy{margin-top:30px}
  .feat-grid,.cool-grid,.scene-grid,.testi-grid,.uni-grid{grid-template-columns:repeat(2,1fr)}
  .stats{grid-template-columns:repeat(2,1fr)}
  .nav-links{display:none;position:absolute;top:64px;left:0;right:0;flex-direction:column;
    background:rgba(5,6,10,.97);padding:18px 20px;gap:14px;border-bottom:1px solid var(--line)}
  .nav-links.open{display:flex}
  .nav-toggle{display:block}
  .scroll-indicator{bottom:16px}
}
@media (max-width:520px){
  .feat-grid,.cool-grid,.scene-grid,.testi-grid,.uni-grid{grid-template-columns:1fr}
  .stats{grid-template-columns:1fr 1fr}
  .en{font-size:10px;letter-spacing:.22em}
  .trust{padding:14px 18px}
}
@media (prefers-reduced-motion:reduce){
  *{animation:none!important;transition:none!important;scroll-behavior:auto!important}
  .reveal{opacity:1;transform:none}
}

@keyframes spin{to{transform:rotate(360deg)}}
@keyframes glow{0%,100%{transform:scale(1);opacity:.85}50%{transform:scale(1.25);opacity:1}}
@keyframes float{0%,100%{transform:translateY(0)}50%{transform:translateY(-10px)}}
@keyframes halo{0%,100%{transform:scale(1);box-shadow:0 0 18px var(--violet),0 0 38px rgba(139,92,246,.45),0 0 60px rgba(34,211,238,.22)}50%{transform:scale(1.15);box-shadow:0 0 28px var(--violet),0 0 58px rgba(139,92,246,.6),0 0 92px rgba(34,211,238,.35)}}
@keyframes halo-ring{0%{transform:scale(.85);opacity:.55}100%{transform:scale(1.55);opacity:0}}