*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

:root{

  color-scheme:dark;
  --bg:#121216;
  --bg2:#1a1a20;
  --surface:rgba(255,255,255,.04);
  --surface2:rgba(255,255,255,.07);
  --border:rgba(255,255,255,.08);
  --border-hover:rgba(255,209,63,.35);
  --text:#EDEDF2;
  --muted:#9A9AA6;
  --muted2:#6E6E7A;

  --green:#2bcf6b;
  --red:#e53f3f;
  --blue:#2f7bf0;
  --yellow:#e9d229;
  --purple:#b34fe0;
  --cyan:#26d0ce;
  --orange:#ff8a2b;
  --gold:#ffd23f;

  --r:12px;
  --r2:20px;
  --nav-h:64px;
  --nav-h-mobile:56px;
}

html{

  background:var(--bg, #121216);
  scroll-behavior:smooth;
  scroll-padding-top:calc(var(--nav-h) + 10px);
  font-size:16px;
}
[id]{ scroll-margin-top:calc(var(--nav-h) + 10px); }

body{
  font-family:system-ui, -apple-system, 'Segoe UI', Arial, sans-serif;
  background:var(--bg);
  color:var(--text);
  overflow-x:hidden;
  line-height:1.6;
  -webkit-tap-highlight-color:transparent;
  touch-action:pan-x pan-y;
  -webkit-overflow-scrolling:touch;
}

a{ color:inherit; text-decoration:none; }
img{ max-width:100%; display:block; }
button{ font-family:inherit; }
ul{ list-style:none; }

::selection{ background:rgba(255,210,63,.3); color:#fff; }

#siteNav{
  position:fixed;
  top:0; left:0; right:0;
  z-index:200;
  height:var(--nav-h);
  background:rgba(18,18,22,.72);
  backdrop-filter:blur(16px);
  -webkit-backdrop-filter:blur(16px);
  border-bottom:1px solid var(--border);
  transition:background .3s, height .3s;
}
#siteNav.scrolled{ background:rgba(18,18,22,.94); }

.nav-inner{
  max-width:1200px;
  margin:0 auto;
  height:var(--nav-h);
  padding:0 5%;
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:16px;
}

.nav-logo{
  display:flex; align-items:center; gap:10px;
  font-family:system-ui, -apple-system, 'Segoe UI', Arial, sans-serif;
  font-weight:700; font-size:1.15rem; letter-spacing:.2px;
  flex-shrink:0;
}
.nav-logo img{ width:30px; height:30px; }

.nav-links{
  display:flex; align-items:center; gap:28px;
  font-size:.92rem; font-weight:500; color:var(--muted);
}
.nav-links a{ position:relative; padding:6px 0; transition:color .2s; }
.nav-links a:hover{ color:var(--text); }
.nav-links a::after{
  content:''; position:absolute; left:0; right:0; bottom:0; height:2px;
  background:linear-gradient(90deg, var(--green), var(--blue));
  transform:scaleX(0); transform-origin:left; transition:transform .25s;
}
.nav-links a:hover::after{ transform:scaleX(1); }

.nav-hamburger{
  display:none; flex-direction:column; justify-content:center; gap:5px;
  width:36px; height:36px; min-width:36px; min-height:36px;
  background:none; border:none; border-radius:0; cursor:pointer; padding:0;
  -webkit-appearance:none; appearance:none; outline:none; box-shadow:none;
  -webkit-tap-highlight-color:transparent;
}
.nav-hamburger:focus,
.nav-hamburger:active,
.nav-hamburger:hover{
  background:none; outline:none; box-shadow:none;
}

.nav-hamburger{ color:var(--text); align-items:center; }
.nav-hamburger svg{ display:block; transition:transform .3s ease, opacity .2s ease; }
.nav-hamburger .nh-close{ display:none; }
.nav-hamburger.open .nh-menu{ display:none; }
.nav-hamburger.open .nh-close{ display:block; animation:nhSwing .3s ease; }
@keyframes nhSwing{ from{ transform:rotate(-70deg) scale(.7); opacity:0; } to{ transform:rotate(0) scale(1); opacity:1; } }

@media (max-width:860px){
  :root{ --nav-h:var(--nav-h-mobile); }
  .nav-links{
    position:fixed; top:var(--nav-h-mobile); left:0; right:0;
    flex-direction:column; align-items:stretch; gap:0;
    background:rgba(18,18,22,.98);
    backdrop-filter:blur(16px);
    -webkit-backdrop-filter:blur(16px);
    border-bottom:1px solid var(--border);
    border-radius:0 0 18px 18px;
    padding:0 12px;
    max-height:0; overflow:hidden;
    transition:max-height .35s ease, padding .35s ease;
  }
  .nav-links.open{ max-height:min(76dvh,480px); overflow-y:auto; padding:10px 12px 14px; scrollbar-width:none; -ms-overflow-style:none; }
  .nav-links.open::-webkit-scrollbar{ display:none; width:0; height:0; }
  .nav-links li{ border-top:none; margin:8px 0 0; opacity:0; transform:translateY(-8px); transition:opacity .28s ease, transform .28s ease; }
  .nav-links li:first-child{ margin-top:0; }
  .nav-links.open li{ opacity:1; transform:none; }
  .nav-links.open li:nth-child(2){ transition-delay:.04s; }
  .nav-links.open li:nth-child(3){ transition-delay:.08s; }
  .nav-links.open li:nth-child(4){ transition-delay:.12s; }
  .nav-links.open li:nth-child(5){ transition-delay:.16s; }
  .nav-links.open li:nth-child(6){ transition-delay:.2s; }
  .nav-links a{ display:flex; align-items:center; gap:12px; padding:13px 16px; min-height:48px; border-radius:14px; font-size:1rem;
    background:var(--theme-card,rgba(255,255,255,.055));
    border:1px solid color-mix(in srgb,var(--theme-accent,#ffb64a) 26%,transparent); }
  .nav-links a::after{ display:none; }
  .nav-links a .ni{ width:18px; height:18px; flex:none; opacity:.9; }
  .nav-links a[aria-current="page"]{ color:var(--theme-accent,#ffb64a); background:var(--theme-accent-soft,rgba(255,182,74,.14)); border-color:color-mix(in srgb,var(--theme-accent,#ffb64a) 65%,transparent); font-weight:600; }
  .nav-hamburger{ display:flex; }
  .nav-right-group{ margin-left:auto; gap:10px !important; }
  .nav-backdrop{ position:fixed; inset:0; z-index:150; background:rgba(0,0,0,.42); backdrop-filter:blur(3px); -webkit-backdrop-filter:blur(3px); opacity:0; pointer-events:none; transition:opacity .3s ease; }
  .nav-backdrop.show{ opacity:1; pointer-events:auto; }
  body.nav-open{ overflow:hidden; }
}
@media (max-width:860px) and (prefers-reduced-motion:reduce){
  .nav-links, .nav-links li, .nav-backdrop{ transition:none; }
}

.hero{
  position:relative;
  min-height:100vh; min-height:100dvh;
  display:flex; flex-direction:column; align-items:center; justify-content:center;
  text-align:center;
  padding:calc(var(--nav-h) + 24px) 6% 60px;
  overflow:hidden;
}
.hero-bg{ position:absolute; inset:0; z-index:0; }
.orb{ position:absolute; border-radius:50%; filter:blur(70px); opacity:.35; }
.orb-1{ width:420px; height:420px; background:var(--green); top:-120px; left:-100px; animation:float 9s ease-in-out infinite; }
.orb-2{ width:380px; height:380px; background:var(--blue); bottom:-140px; right:-80px; animation:float 11s ease-in-out infinite reverse; }
.orb-3{ width:300px; height:300px; background:var(--red); top:40%; left:60%; animation:float 13s ease-in-out infinite; }
.grid-bg{
  position:absolute; inset:0;
  background-image:
    linear-gradient(rgba(255,255,255,.035) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255,255,255,.035) 1px, transparent 1px);
  background-size:42px 42px;
  mask-image:radial-gradient(ellipse at 50% 30%, #000 30%, transparent 75%);
}
#particles{ position:absolute; inset:0; overflow:hidden; }

.hero-badge{
  position:relative; z-index:1;
  display:inline-flex; align-items:center; gap:8px;
  padding:8px 16px; border-radius:20px;
  background:var(--surface); border:1px solid var(--border);
  font-size:.82rem; color:var(--muted); margin-bottom:26px;
}
.pulse-dot{
  width:8px; height:8px; border-radius:50%; background:var(--green);
  flex:0 0 8px; min-width:8px; min-height:8px;
  box-shadow:0 0 0 0 rgba(43,207,107,.6);
  animation:pulse-anim 1.8s infinite;
}

.hero h1{
  position:relative; z-index:1;
  font-family:system-ui,-apple-system,'Segoe UI',Arial,sans-serif;
  font-size:clamp(2.2rem, 6vw, 4rem);
  font-weight:700; line-height:1.1; letter-spacing:-.5px;
}
.h1-accent{
  background:linear-gradient(90deg, var(--green), var(--blue) 55%, var(--red));
  -webkit-background-clip:text; background-clip:text; color:transparent;
}

.hero-sub{
  position:relative; z-index:1;
  max-width:560px; margin:22px auto 34px;
  color:var(--muted); font-size:1.05rem;
}

.hero-btns{ position:relative; z-index:1; display:flex; gap:14px; flex-wrap:wrap; justify-content:center; }
.btn-primary, .btn-ghost{
  padding:14px 30px; border-radius:12px; font-weight:700; font-size:.98rem;
  display:inline-flex; align-items:center; gap:8px; cursor:pointer; border:none;
  transition:transform .2s, box-shadow .2s, background .2s;
}
.btn-primary{
  background:linear-gradient(135deg, var(--green), #1a9e4e);
  color:#08160c; box-shadow:0 8px 24px rgba(43,207,107,.3);
}
.btn-primary:hover{ transform:translateY(-3px); box-shadow:0 14px 30px rgba(43,207,107,.42); }
.btn-ghost{
  background:var(--surface); color:var(--text); border:1px solid var(--border);
}
.btn-ghost:hover{ background:var(--surface2); border-color:var(--border-hover); transform:translateY(-3px); }

.hero-stats{
  position:relative; z-index:1;
  display:flex; gap:44px; flex-wrap:wrap; justify-content:center;
  margin-top:56px;
}
.hs-item{ display:flex; flex-direction:column; align-items:center; gap:4px; }
.hs-num{ font-family:system-ui,-apple-system,'Segoe UI',Arial,sans-serif; font-size:1.7rem; font-weight:700; }
.hs-label{ font-size:.82rem; color:var(--muted); }

@media (max-width:600px){
  .hero-stats{ gap:28px; }
  .hs-num{ font-size:1.4rem; }
}

.section{ padding:90px 6%; max-width:1200px; margin:0 auto; }
.section-label{
  text-align:center; text-transform:uppercase; letter-spacing:2px;
  font-size:.78rem; color:#ffb64a; font-weight:700; margin-bottom:12px;
}
.section-title{
  text-align:center; font-family:system-ui,-apple-system,'Segoe UI',Arial,sans-serif;
  font-size:clamp(1.6rem, 4vw, 2.4rem); font-weight:700; margin-bottom:12px;
}
.section-sub{
  text-align:center; color:var(--muted); max-width:560px; margin:0 auto 50px;
}

.features-grid{
  display:grid; grid-template-columns:repeat(auto-fit, minmax(260px,1fr));
  gap:22px;
}
.feat-card{
  position:relative; padding:28px 24px; border-radius:var(--r2);
  background:var(--surface); border:1px solid var(--border);
  overflow:hidden; transition:transform .3s, border-color .3s, background .3s;
}
.feat-card::before{
  content:''; position:absolute; inset:0; border-radius:inherit;
  background:radial-gradient(circle at 30% 0%, var(--accent, var(--green)) 0%, transparent 60%);
  opacity:0; transition:opacity .35s;
}
.feat-card:hover::before{ opacity:.14; }
.feat-card:hover{ transform:translateY(-6px); border-color:var(--border-hover); }
.feat-icon{
  width:52px; height:52px; border-radius:14px;
  display:flex; align-items:center; justify-content:center;
  font-size:1.5rem; margin-bottom:16px; position:relative; z-index:1;
}
.feat-title{ font-size:1.1rem; font-weight:700; margin-bottom:8px; position:relative; z-index:1; }
.feat-desc{ font-size:.92rem; color:var(--muted); margin-bottom:16px; position:relative; z-index:1; }
.feat-tag{
  display:inline-block; padding:4px 12px; border-radius:20px;
  font-size:.75rem; font-weight:700; position:relative; z-index:1;
}

.cta-section{
  position:relative; text-align:center; padding:100px 6%;
  border-top:1px solid var(--border); overflow:hidden;
}
.cta-bg{
  position:absolute; inset:0; z-index:0;
  background:radial-gradient(ellipse at 50% 0%, rgba(43,207,107,.14), transparent 65%);
}
.cta-title{
  position:relative; z-index:1; font-family:system-ui,-apple-system,'Segoe UI',Arial,sans-serif;
  font-size:clamp(1.6rem, 4vw, 2.4rem); font-weight:700; margin-bottom:14px;
}
.cta-sub{ position:relative; z-index:1; color:var(--muted); max-width:480px; margin:0 auto 30px; }

footer{ border-top:1px solid var(--border); padding:60px 6% 30px; }
.footer-grid{
  max-width:1200px; margin:0 auto;
  display:grid; grid-template-columns:1.4fr 1fr 1fr 1fr; gap:36px;
}
.footer-brand p{ color:var(--muted); font-size:.88rem; margin:14px 0 18px; max-width:280px; }
.footer-col h4{ font-size:.85rem; margin-bottom:14px; color:var(--muted); text-transform:uppercase; letter-spacing:1px; }
.footer-col a{ display:block; font-size:.9rem; color:var(--text); opacity:.82; padding:6px 0; transition:opacity .2s; }
.footer-col a:hover{ opacity:1; color:#ffb64a; }
.footer-bottom{
  max-width:1200px; margin:36px auto 0; padding-top:22px; border-top:1px solid var(--border);
  display:flex; justify-content:space-between; flex-wrap:wrap; gap:10px;
  font-size:.8rem; color:var(--muted2);
}

@media (max-width:768px){
  .footer-grid{ grid-template-columns:1fr 1fr; }
}
@media (max-width:480px){
  .footer-grid{ grid-template-columns:1fr; }
  .section{ padding:64px 6%; }
}

.inner-page{ padding:calc(var(--nav-h) + 46px) 6% 90px; max-width:800px; margin:0 auto; }
.inner-page h1{
  font-family:system-ui,-apple-system,'Segoe UI',Arial,sans-serif;
  font-size:clamp(1.8rem, 5vw, 2.6rem); margin-bottom:12px;
}
.inner-page .sub{ color:var(--muted); margin-bottom:40px; font-size:1rem; }
.inner-page h2{ font-size:1.3rem; margin:38px 0 14px; font-family:system-ui,-apple-system,'Segoe UI',Arial,sans-serif; }
.inner-page p{ color:var(--muted); margin-bottom:14px; }
.inner-page ul{ margin:0 0 18px; padding-left:0; }
.inner-page li{
  list-style:none; position:relative; padding-left:22px; margin-bottom:10px;
  color:var(--muted); font-size:.95rem;
}
.inner-page li::before{
  content:'●'; position:absolute; left:0; top:1px; font-size:.6rem; color:var(--green); top:6px;
}
.back-link{
  display:inline-flex; align-items:center; gap:6px;
  color:var(--green); font-weight:600; font-size:.9rem; transition:gap .2s;
}
.back-link:hover{ gap:10px; }

.rule-card{
  padding:20px; border-radius:var(--r); background:var(--surface);
  border:1px solid var(--border); margin-bottom:16px;
  display:flex; gap:16px; align-items:flex-start;
}
.rule-card .rc-icon{ font-size:1.6rem; flex-shrink:0; }
.rule-card h3{ font-size:1rem; margin-bottom:6px; }
.rule-card p{ margin:0; font-size:.9rem; }

.timeline{ position:relative; padding-left:26px; }
.timeline::before{
  content:''; position:absolute; left:6px; top:6px; bottom:6px; width:2px;
  background:linear-gradient(var(--green), var(--blue));
}
.timeline-item{ position:relative; padding-bottom:30px; }
.timeline-item::before{
  content:''; position:absolute; left:-26px; top:2px; width:14px; height:14px; border-radius:50%;
  background:var(--bg); border:3px solid var(--green);
}
.timeline-item h3{ font-size:1rem; margin-bottom:4px; }
.timeline-item .tl-ver{ font-size:.75rem; color:var(--gold); font-weight:700; letter-spacing:.5px; }
.timeline-item p{ font-size:.9rem; margin-top:4px; }

.tech-badges{ display:flex; flex-wrap:wrap; gap:10px; margin-top:10px; }
.tech-badge{
  padding:7px 14px; border-radius:20px; background:var(--surface);
  border:1px solid var(--border); font-size:.82rem; color:var(--muted);
}

.game-app{
  position:relative;
  height:100vh; height:100dvh;
  box-sizing:border-box;
  padding-top:var(--nav-h);
  padding-bottom:env(safe-area-inset-bottom, 0px);
  overflow:hidden;
  touch-action:none;
  overscroll-behavior:none;
}

#pwa-install{
  position:fixed;left:16px;bottom:16px;z-index:1200;
  display:flex;align-items:stretch;
  border:1px solid rgba(255,255,255,.18);border-radius:12px;overflow:hidden;
  box-shadow:0 6px 24px rgba(0,0,0,.45);
  -webkit-backdrop-filter:blur(6px);backdrop-filter:blur(6px);
}
#pwa-install button{
  border:0;background:rgba(30,30,42,.92);color:#fff;
  font:600 14px/1.2 'Segoe UI',system-ui,sans-serif;
  cursor:pointer;transition:background .2s;
}
#pwa-install-btn{padding:10px 14px}
#pwa-install-close{
  padding:0 12px;color:#a7a7b3;font-size:13px;
  border-left:1px solid rgba(255,255,255,.14) !important;
}
#pwa-install button:hover{background:rgba(52,52,70,.95)}
#pwa-install-close:hover{color:#fff}
@media (max-width:600px){
  #pwa-install{left:12px;bottom:12px}
  #pwa-install-btn{padding:9px 12px;font-size:13px}
  #pwa-install-close{padding:0 11px}
}

.nav-spacer{ width:130px; height:1px; flex-shrink:1; }
@media (max-width:860px){ .nav-spacer{ display:none; } }

:focus-visible{outline:3px solid #ffb64a;outline-offset:3px}
@media (max-width:860px),(pointer:coarse){.nav-hamburger,.sound-toggle-btn{min-width:44px;min-height:44px}.nav-links a{min-height:44px}.footer-col a{min-height:44px;display:flex;align-items:center}.back-link{display:inline-flex;align-items:center;min-height:44px}}

html{scrollbar-gutter:stable}

@media (min-width:861px){
  #siteNav{left:0;right:auto;width:100vw}
  #siteNav .nav-links{position:absolute;left:50%;top:50%;transform:translate(-50%,-50%)}
  #siteNav .nav-links > li:first-child{width:116px;min-width:116px;display:flex;justify-content:center}

  #siteNav .nav-inner{position:relative;justify-content:flex-end}
  #siteNav .nav-logo{position:absolute;top:50%;transform:translateY(-50%);right:calc(50% + 296px);margin:0}

  #siteNav .nav-right-group{position:absolute;top:50%;transform:translateY(-50%);left:calc(50% + 296px)}
}

@view-transition{navigation:auto}
::view-transition-old(root),::view-transition-new(root){animation-duration:.12s}

@media (min-width:2200px) and (min-height:1200px){
  :root{ --nav-h:88px; }

  #siteNav .nav-inner{ zoom:1.35; height:calc(88px / 1.35); }

  body{ font-size:1.15rem; }
  .inner-page{ max-width:1060px; }
  .section{ max-width:1060px; }
}
@media (min-width:3400px) and (min-height:1800px){
  :root{ --nav-h:122px; }
  #siteNav .nav-inner{ zoom:1.9; height:calc(122px / 1.9); }
  body{ font-size:1.6rem; }
  .inner-page{ max-width:1400px; }
  .section{ max-width:1400px; }
}

footer{margin-top:clamp(30px,4vw,56px)}

.vfooter-bottom a{color:var(--theme-accent,var(--accent,#ffb64a));font-weight:600;text-decoration:none}
.vfooter-bottom a:hover{text-decoration:underline}

a,button,.chip{touch-action:manipulation}

@media (max-width:860px){
  #siteNav .nav-links a{ display:flex; width:100%; box-sizing:border-box; padding:13px 18px; min-height:48px; gap:12px; font-size:.98rem; white-space:normal; }
}