:root{
  --bg:#040b15;
  --bg-soft:#091423;
  --surface:#0a1728;
  --surface-2:#0f2238;
  --surface-3:#132b45;
  --line:rgba(125,164,206,.16);
  --line-strong:rgba(84,220,255,.28);
  --text:#eef7ff;
  --muted:#9db4c8;
  --muted-2:#7991a8;
  --cyan:#40dcff;
  --cyan-2:#8be8ff;
  --green:#14eb8d;
  --gold:#ffc955;
  --violet:#b06cff;
  --shadow:0 30px 90px rgba(0,0,0,.42);
  --radius-xl:28px;
  --radius-lg:22px;
  --radius-md:18px;
  --max:1180px;
  --reading:920px;
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{
  margin:0;
  min-height:100vh;
  color:var(--text);
  font:400 16px/1.65 -apple-system,BlinkMacSystemFont,"SF Pro Display","SF Pro Text","Segoe UI",Inter,Arial,sans-serif;
  background:
    radial-gradient(circle at 12% 12%, rgba(64,220,255,.11), transparent 24%),
    radial-gradient(circle at 82% 10%, rgba(176,108,255,.10), transparent 24%),
    radial-gradient(circle at 70% 70%, rgba(20,235,141,.06), transparent 26%),
    linear-gradient(180deg, #020913 0%, #07101b 44%, #040a13 100%);
  -webkit-font-smoothing:antialiased;
}
body::before{
  content:"";
  position:fixed;
  inset:0;
  pointer-events:none;
  background-image:
    radial-gradient(circle at 10% 18%, rgba(255,255,255,.9) 0 1px, transparent 1.5px),
    radial-gradient(circle at 82% 24%, rgba(255,255,255,.55) 0 1px, transparent 1.7px),
    radial-gradient(circle at 44% 75%, rgba(255,255,255,.65) 0 1px, transparent 1.6px),
    radial-gradient(circle at 72% 82%, rgba(255,255,255,.4) 0 1px, transparent 1.5px),
    radial-gradient(circle at 24% 58%, rgba(255,255,255,.7) 0 1px, transparent 1.6px);
  background-size:260px 260px, 320px 320px, 360px 360px, 300px 300px, 280px 280px;
  opacity:.28;
}
a{color:inherit;text-decoration:none}
img{display:block;max-width:100%}
button{font:inherit}
.wrap,.reading{position:relative;z-index:1;width:min(calc(100% - 32px),var(--max));margin-inline:auto}
.reading{width:min(calc(100% - 32px),var(--reading))}
.site-header{
  position:sticky;top:0;z-index:50;
  border-bottom:1px solid var(--line);
  background:rgba(3,9,18,.82);
  backdrop-filter:blur(16px);
}
.nav{min-height:74px;display:flex;align-items:center;gap:20px;justify-content:space-between}
.brand{display:inline-flex;align-items:center;gap:12px;font-weight:800;letter-spacing:-.03em;font-size:18px}
.brand-orbit{
  width:34px;height:34px;border-radius:50%;position:relative;overflow:hidden;
  background:radial-gradient(circle at 50% 45%, rgba(64,220,255,.45), rgba(64,220,255,.12) 44%, rgba(5,14,25,.8) 46%);
  border:1px solid rgba(64,220,255,.42);
  box-shadow:0 0 0 4px rgba(64,220,255,.08), inset 0 0 22px rgba(64,220,255,.18);
}
.brand-orbit::before,.brand-orbit::after{content:"";position:absolute;border-radius:50%}
.brand-orbit::before{inset:6px;border:1px solid rgba(64,220,255,.45)}
.brand-orbit::after{inset:13px;background:var(--cyan);box-shadow:0 0 12px rgba(64,220,255,.95)}
.menu-toggle{
  display:none;align-items:center;justify-content:center;
  width:42px;height:42px;border-radius:14px;border:1px solid var(--line);
  background:rgba(10,23,40,.84);color:#fff;cursor:pointer
}
.nav-links{display:flex;align-items:center;gap:18px;color:#c7d8e7;font-size:14px}
.nav-links a{opacity:.9}
.nav-links a:hover,.nav-links a.active{opacity:1;color:#fff}
.label-pill,.hero-kicker,.section-tag,.mini-tag{
  display:inline-flex;align-items:center;gap:8px;
  border:1px solid rgba(64,220,255,.24);border-radius:999px;
  padding:8px 12px;background:rgba(9,21,36,.72);
  color:var(--cyan-2);font-size:12px;font-weight:800;letter-spacing:.14em;text-transform:uppercase
}
.label-pill::before,.hero-kicker::before,.section-tag::before,.mini-tag::before{
  content:"";width:8px;height:8px;border-radius:50%;background:var(--green);
  box-shadow:0 0 10px rgba(20,235,141,.9)
}
main{overflow:hidden}
.hero{padding:72px 0 40px}
.hero-grid{display:grid;grid-template-columns:minmax(0,1fr) minmax(0,560px);align-items:center;gap:42px}
.hero-copy h1{
  margin:18px 0 18px;
  font-size:clamp(48px,8vw,84px);line-height:.92;letter-spacing:-.07em
}
.hero-copy h1 span{display:block;color:var(--cyan-2);text-shadow:0 0 24px rgba(64,220,255,.18)}
.hero-intro,.doc-lead{margin:0 0 24px;color:#c5d6e5;font-size:19px;max-width:660px}
.hero-actions{display:flex;gap:12px;flex-wrap:wrap;margin:0 0 24px}
.button{
  display:inline-flex;align-items:center;justify-content:center;min-height:52px;padding:0 20px;
  border-radius:16px;border:1px solid var(--line);font-weight:800;font-size:15px;
  transition:transform .18s ease,border-color .18s ease,background .18s ease
}
.button:hover{transform:translateY(-1px)}
.button.primary{background:linear-gradient(180deg,#19ef92,#00d16a);color:#04111d;border-color:transparent;box-shadow:0 16px 36px rgba(20,235,141,.24)}
.button.secondary{background:rgba(9,23,40,.88);color:#eef7ff}
.hero-meta{display:flex;gap:10px;flex-wrap:wrap}
.hero-meta span,.meta-chip{
  display:inline-flex;gap:8px;align-items:center;padding:10px 14px;border-radius:999px;
  background:rgba(8,20,35,.86);border:1px solid var(--line);color:#d7e6f3;font-size:13px
}
.hero-meta strong,.meta-chip strong{color:#fff}
.hero-visual{position:relative}
.hero-card,.visual-card,.image-card,.doc-thumb,.glass-card,.rule,.system-cell,.doc-link,.contact-card,.notice,.summary,.qa-card,.fact-card,.apple-point,details,.quick-link{
  background:linear-gradient(180deg, rgba(11,25,42,.94), rgba(7,16,28,.96));
  border:1px solid var(--line);border-radius:var(--radius-xl);box-shadow:var(--shadow)
}
.hero-card{overflow:hidden;padding:14px}
.hero-card img{width:100%;aspect-ratio:16/11;object-fit:cover;border-radius:22px;border:1px solid rgba(255,255,255,.05)}
.hero-badge{position:absolute;left:24px;right:24px;bottom:24px;display:flex;gap:10px;flex-wrap:wrap}
.hero-badge span{padding:9px 12px;border-radius:999px;background:rgba(4,14,26,.68);border:1px solid rgba(64,220,255,.24);font-size:12px;color:#dcebf8}
.section{padding:76px 0;border-top:1px solid rgba(112,154,201,.10)}
.section-head{display:flex;justify-content:space-between;align-items:end;gap:28px;margin-bottom:28px}
.section-head h2{margin:14px 0 0;font-size:clamp(34px,5.4vw,56px);line-height:.96;letter-spacing:-.06em;max-width:760px}
.section-head p{margin:0;max-width:520px;color:var(--muted)}
.gameplay{display:grid;grid-template-columns:minmax(0,520px) minmax(0,1fr);gap:20px;align-items:start}
.gameplay-visual{position:relative;overflow:hidden;padding:12px}
.gameplay-visual img{width:100%;aspect-ratio:4/3;object-fit:cover;border-radius:20px;border:1px solid rgba(255,255,255,.05)}
.gameplay-caption{display:flex;justify-content:space-between;gap:12px;align-items:center;margin-top:12px;color:#d9e7f5;font-size:14px}
.gameplay-caption strong{font-size:16px}
.rule-list{display:grid;gap:14px}
.rule{padding:22px}
.rule-number,.code,.doc-mini{display:block;color:var(--cyan-2);font-size:12px;font-weight:800;letter-spacing:.12em;text-transform:uppercase;margin-bottom:10px}
.rule h3,.system-cell h3,.doc-link strong,.contact-card h2,.qa-card h3{margin:0 0 8px;font-size:23px;line-height:1.08;letter-spacing:-.03em}
.rule p,.system-cell p,.doc-link p,.contact-card p,.notice p,.summary p,.apple-copy p,.doc p,.doc li,.doc-lead,.qa-card p{margin:0;color:var(--muted)}
.gameplay-note{margin-top:16px;padding:16px 18px;border-radius:18px;background:rgba(7,17,29,.75);border:1px dashed rgba(125,164,206,.24);color:#9cb2c6;font-size:14px}
.screenrail{display:grid;grid-template-columns:repeat(3,1fr);gap:16px}
.screen-item{overflow:hidden;border-radius:24px;background:linear-gradient(180deg, rgba(11,25,42,.94), rgba(7,16,28,.96));border:1px solid var(--line);box-shadow:var(--shadow)}
.screen-item img{width:100%;aspect-ratio:4/3;object-fit:cover}
.screen-info{padding:18px}
.screen-info small{display:block;color:var(--cyan-2);font-size:12px;font-weight:800;letter-spacing:.12em;text-transform:uppercase;margin-bottom:8px}
.screen-info strong{display:block;font-size:20px;line-height:1.12;margin-bottom:8px}
.screen-info p{margin:0;color:var(--muted)}
.system-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:16px}
.system-cell{padding:22px;position:relative;overflow:hidden}
.system-cell::after{content:"";position:absolute;right:-18px;top:-18px;width:100px;height:100px;border-radius:50%;background:radial-gradient(circle, rgba(64,220,255,.16), transparent 72%)}
.system-cell.green::after{background:radial-gradient(circle, rgba(20,235,141,.16), transparent 72%)}
.system-cell.gold::after{background:radial-gradient(circle, rgba(255,201,85,.18), transparent 72%)}
.system-cell.violet::after{background:radial-gradient(circle, rgba(176,108,255,.18), transparent 72%)}
.apple-block{display:grid;grid-template-columns:minmax(0,1fr) minmax(0,420px);gap:20px;align-items:center}
.apple-copy{padding-right:8px}
.apple-points{display:grid;grid-template-columns:repeat(2,1fr);gap:12px;margin-top:20px}
.apple-point{padding:18px 18px 16px}
.apple-point small{display:block;color:var(--cyan-2);text-transform:uppercase;letter-spacing:.12em;font-size:12px;font-weight:800;margin-bottom:6px}
.apple-point b{font-size:17px;line-height:1.25}
.apple-image{overflow:hidden;padding:12px}
.apple-image img{width:100%;aspect-ratio:4/3;object-fit:cover;border-radius:20px;border:1px solid rgba(255,255,255,.05)}
.links-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:16px}
.doc-link{padding:22px;transition:transform .18s ease,border-color .18s ease}
.doc-link:hover{transform:translateY(-2px);border-color:var(--line-strong)}
.doc-link small{display:block;color:var(--cyan-2);font-size:12px;font-weight:800;letter-spacing:.12em;text-transform:uppercase;margin-bottom:10px}
.doc-link strong{display:block}
.site-footer{border-top:1px solid rgba(112,154,201,.12);padding:34px 0 42px;color:#8ea6bb;font-size:13px}
.footer-top{display:flex;justify-content:space-between;gap:20px;flex-wrap:wrap;align-items:flex-start}
.footer-brand{font-size:16px;font-weight:800;color:#eef7ff;margin-bottom:4px}
.footer-copy{color:#92a8bc;max-width:520px}
.footer-links{display:flex;gap:18px;flex-wrap:wrap}
.footer-legal{margin-top:12px;color:#73879b;line-height:1.6}
/* docs */
.page-shell{padding:64px 0 88px}
.doc-head{display:grid;grid-template-columns:minmax(0,1fr) minmax(250px,360px);gap:22px;align-items:start;margin-bottom:28px}
.doc-title{margin:16px 0 14px;font-size:clamp(40px,6.2vw,68px);line-height:.95;letter-spacing:-.06em}
.doc-meta{color:var(--muted-2);font-size:13px}
.doc-thumb{overflow:hidden;padding:12px}
.doc-thumb img{width:100%;aspect-ratio:4/3;object-fit:cover;border-radius:20px;border:1px solid rgba(255,255,255,.05)}
.summary{padding:20px 22px;margin:0 0 32px}
.summary strong{display:block;font-size:16px;margin-bottom:6px}
.doc section,.doc-block{padding:26px 0;border-top:1px solid rgba(112,154,201,.10)}
.doc section:first-of-type{border-top:0;padding-top:0}
.doc h2{font-size:28px;letter-spacing:-.03em;line-height:1.06;margin:0 0 12px}
.doc ul{padding-left:20px;margin:0}
.doc a.inline{color:var(--cyan-2);text-decoration:underline;text-underline-offset:3px}
.quick-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:12px;margin-top:32px}
.quick-link{display:block;padding:18px}
.quick-link small{display:block;color:var(--cyan-2);font-size:12px;font-weight:800;letter-spacing:.12em;text-transform:uppercase;margin-bottom:8px}
.quick-link b{display:block;font-size:17px;line-height:1.2}
.data-table{width:100%;border-collapse:collapse;border:1px solid var(--line);border-radius:20px;overflow:hidden;font-size:14px}
.data-table th,.data-table td{padding:15px;border-bottom:1px solid rgba(112,154,201,.12);text-align:left;vertical-align:top}
.data-table th{background:rgba(14,31,50,.9);color:#ecf6ff;font-size:12px;letter-spacing:.08em;text-transform:uppercase}
.data-table td{background:rgba(6,14,25,.82);color:#bfd0df}
.data-table tr:last-child td{border-bottom:0}
.contact-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:16px;margin:0 0 28px}
.contact-card{padding:22px}
.contact-card small{display:block;color:var(--gold);text-transform:uppercase;letter-spacing:.12em;font-size:12px;font-weight:800;margin-bottom:10px}
.contact-card a.cta{display:inline-block;margin-top:16px;color:var(--cyan-2);font-weight:800}
.notice{padding:18px 20px;margin:26px 0}
.notice strong{display:block;margin-bottom:6px}
.faq{display:grid;gap:12px;margin-top:18px}
details{padding:16px 18px}
summary{cursor:pointer;list-style:none;font-weight:800}
summary::-webkit-details-marker{display:none}
details p{margin:8px 0 0;color:var(--muted)}
.qa-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:12px;margin-top:22px}
.qa-card{padding:18px}
.qa-card h3{font-size:18px;margin-bottom:6px}
@media (max-width: 1024px){
  .hero-grid,.gameplay,.apple-block,.doc-head{grid-template-columns:1fr}
  .system-grid{grid-template-columns:repeat(2,1fr)}
  .links-grid{grid-template-columns:repeat(2,1fr)}
  .screenrail{grid-template-columns:repeat(2,1fr)}
  .quick-grid,.qa-grid{grid-template-columns:repeat(2,1fr)}
}
@media (max-width: 760px){
  .wrap,.reading{width:min(calc(100% - 24px),var(--max))}
  .menu-toggle{display:inline-flex}
  .nav-links{
    position:absolute;left:12px;right:12px;top:calc(100% + 10px);display:none;flex-direction:column;align-items:stretch;gap:8px;
    padding:12px;border:1px solid var(--line);border-radius:22px;background:rgba(5,13,24,.96);box-shadow:var(--shadow)
  }
  .nav-links.open{display:flex}
  .nav-links a{padding:10px 12px;border-radius:12px;background:rgba(10,23,40,.72)}
  .hero{padding:54px 0 28px}
  .hero-copy h1{font-size:54px}
  .hero-intro,.doc-lead{font-size:17px}
  .section{padding:58px 0}
  .section-head{display:block}
  .section-head p{margin-top:14px}
  .hero-meta,.hero-actions,.apple-points{display:grid;grid-template-columns:1fr}
  .screenrail,.system-grid,.links-grid,.contact-grid,.quick-grid,.qa-grid{grid-template-columns:1fr}
  .button{width:100%}
  .data-table{display:block;overflow-x:auto;white-space:nowrap}
}

/* language switch */
.nav-links{margin-left:auto}
.lang-switch{
  display:inline-flex;align-items:center;gap:4px;margin-left:4px;padding:4px;
  border:1px solid var(--line);border-radius:999px;background:rgba(8,20,35,.86);
  box-shadow:inset 0 0 0 1px rgba(255,255,255,.015)
}
.lang-switch a,.lang-switch span{
  min-width:38px;height:32px;display:inline-flex;align-items:center;justify-content:center;
  border-radius:999px;font-size:12px;font-weight:850;letter-spacing:.08em;color:#9db4c8
}
.lang-switch a:hover{color:#fff;background:rgba(64,220,255,.08)}
.lang-switch .active{color:#04111d;background:linear-gradient(180deg,#8be8ff,#40dcff);box-shadow:0 6px 18px rgba(64,220,255,.18)}
@media (max-width:760px){
  .nav{justify-content:flex-start}
  .lang-switch{margin-left:auto}
  .menu-toggle{margin-left:0}
}