@font-face{
  font-family:"Noto Sans SC";
  font-style:normal;
  font-weight:400 900;
  font-display:swap;
  src:url(../assets/fonts/noto-sans-sc.woff2) format("woff2");
}

:root{
  --lime:#C8F54A;
  --paper:#FAFAFA;
  --ink:#111111;
  --muted:#888888;
  --line:rgba(17,17,17,.18);
  --font:"Noto Sans SC","PingFang SC","Microsoft YaHei",sans-serif;
  --space:24px;
  --nav-h:72px;
}

*,*::before,*::after{box-sizing:border-box}

.sr-only{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0,0,0,0);white-space:nowrap;border:0}

html{
  scroll-behavior:smooth;
  scroll-padding-top:var(--nav-h);
  -webkit-text-size-adjust:100%;
}

body{
  margin:0;
  font-family:var(--font);
  font-size:17px;
  line-height:1.7;
  color:var(--ink);
  background:var(--paper);
  font-variant-numeric:tabular-nums;
}

h1,h2,h3,p,ol,ul,figure{margin:0}
ol,ul{padding:0;list-style:none}
img{max-width:100%;display:block}
a{color:inherit;text-decoration:none}
button{font:inherit;color:inherit}

:focus-visible{outline:2px solid var(--ink);outline-offset:2px}

@media (prefers-reduced-motion: no-preference) {
  html.js-ok .rise:not(.is-in){
    opacity:0;
    transform:translateY(12px);
  }
  html.js-ok .rise.is-in{
    opacity:1;
    transform:translateY(0);
    transition:opacity .28s ease-out,transform .28s ease-out;
  }
}

/* ---------- navigation ---------- */

.site-nav{
  position:sticky;
  top:0;
  z-index:20;
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:16px;
  height:var(--nav-h);
  padding:0 clamp(20px,4vw,64px);
  padding-left:max(clamp(20px,4vw,64px), env(safe-area-inset-left, 0px));
  padding-right:max(clamp(20px,4vw,64px), env(safe-area-inset-right, 0px));
  color:var(--ink);
  background:transparent;
  transition:color .25s ease;
}

.site-nav.on-hero{
  color:#fff;
  text-shadow:0 1px 12px rgba(0,0,0,.35);
}

.brand{
  font-size:22px;
  font-weight:700;
  letter-spacing:.02em;
  white-space:nowrap;
  transition:opacity .15s ease;
}

.brand.is-away,
.nav-links.is-away{
  opacity:0;
  pointer-events:none;
}

.nav-links{
  display:flex;
  gap:clamp(18px,3vw,52px);
  transition:opacity .15s ease;
}

.nav-links a{
  position:relative;
  font-size:15px;
  font-weight:500;
  padding:6px 2px;
}

.nav-links a::after{
  content:"";
  position:absolute;
  left:0;
  right:0;
  bottom:0;
  height:2px;
  background:currentColor;
  transform:scaleX(0);
  transform-origin:left;
  transition:transform .2s ease;
}

.nav-links a[aria-current="true"]::after{transform:scaleX(1)}

/* ---------- hero ---------- */

.hero{
  position:relative;
  min-height:100vh;
  margin-top:calc(-1 * var(--nav-h));
  overflow:hidden;
  background:#1b1b1b;
}

.hero-media{
  position:absolute;
  inset:0;
  width:100%;
  height:100%;
  object-fit:cover;
  object-position:center;
  z-index:0;
}

.hero::after{
  content:"";
  position:absolute;
  inset:0;
  background:#000;
  opacity:.35;
  pointer-events:none;
  z-index:1;
}

.hero-title{
  position:absolute;
  inset:0;
  z-index:2;
  display:flex;
  align-items:center;
  justify-content:center;
  transform:translateY(-4%);
  color:#fff;
  font-size:clamp(56px,9vw,128px);
  font-weight:900;
  line-height:1;
  letter-spacing:0;
  text-shadow:0 2px 24px rgba(0,0,0,.35);
  pointer-events:none;
}

.hero-cards{
  position:absolute;
  left:0;
  right:0;
  bottom:0;
  z-index:2;
  display:flex;
  align-items:flex-end;
  justify-content:space-between;
  gap:18px;
  padding:0 clamp(20px,4vw,64px) clamp(24px,5vh,56px);
  padding-left:max(clamp(20px,4vw,64px), env(safe-area-inset-left, 0px));
  padding-right:max(clamp(20px,4vw,64px), env(safe-area-inset-right, 0px));
  padding-bottom:max(clamp(24px,5vh,56px), env(safe-area-inset-bottom, 0px));
}

.hero-card{
  background:rgba(17,17,17,.72);
  color:#fff;
  border-radius:12px;
  padding:20px 22px;
}

.card-label{
  display:block;
  font-size:12px;
  font-weight:500;
  letter-spacing:.28em;
  text-transform:uppercase;
  color:rgba(255,255,255,.65);
}

.ip-card{
  display:flex;
  align-items:center;
  gap:20px;
  width:max-content;
  max-width:min(520px,90vw);
}

.ip-copy{min-width:0}

.ip-kicker{
  display:flex;
  align-items:baseline;
  gap:10px;
}

.ip-kicker .card-label{display:inline}

.ip-sep,
.ip-meta{
  font-size:12px;
  font-weight:400;
  letter-spacing:0;
  color:rgba(255,255,255,.55);
}

.ip-value{
  margin:6px 0 0;
  font-family:var(--font);
  font-weight:700;
  font-size:19px;
  letter-spacing:.02em;
  word-break:break-all;
}

.copy-btn{
  display:inline-block;
  flex:none;
  background:var(--lime);
  color:#111;
  border:0;
  border-radius:4px;
  padding:10px 32px;
  font-size:15px;
  font-weight:700;
  cursor:pointer;
  transition:opacity .15s ease;
}

.copy-btn:hover{opacity:.85}

.copy-btn-icon{display:none;width:20px;height:20px}

.qr-card{
  display:flex;
  flex-direction:column;
  align-items:center;
  gap:10px;
  text-align:center;
}

.qr-card img{
  width:clamp(120px,11vw,180px);
  height:auto;
  border-radius:4px;
  background:#fff;
  padding:8px;
}

.qr-label{
  letter-spacing:.06em;
  text-transform:none;
  white-space:nowrap;
  color:rgba(255,255,255,.85);
}

/* ---------- paper ---------- */

.paper{
  position:relative;
  background-color:var(--paper);
  background-image:
    repeating-linear-gradient(to right,rgba(17,17,17,.04) 0 1px,transparent 1px 80px),
    repeating-linear-gradient(to bottom,rgba(17,17,17,.04) 0 1px,transparent 1px 80px);
}

.geometry{
  position:absolute;
  inset:0;
  width:100%;
  height:100%;
  z-index:0;
  pointer-events:none;
}

.geo-marks path{
  fill:none;
  stroke:rgba(17,17,17,.35);
  stroke-width:1;
  vector-effect:non-scaling-stroke;
}

/* ---------- shared section shell ---------- */

.section{
  position:relative;
  z-index:1;
  display:flex;
  flex-direction:column;
  justify-content:center;
  min-height:100vh;
  padding:clamp(80px,11vh,140px) clamp(20px,5vw,72px);
  padding-left:max(clamp(20px,5vw,72px), env(safe-area-inset-left, 0px));
  padding-right:max(clamp(20px,5vw,72px), env(safe-area-inset-right, 0px));
  background:transparent;
}

.section-head{margin-bottom:clamp(28px,5vh,58px)}

.section-head-row{
  display:flex;
  align-items:center;
  gap:14px;
}

.section-title{
  font-size:clamp(44px,5.2vw,76px);
  font-weight:900;
  line-height:1.05;
  letter-spacing:0;
}

.section-mark{
  display:block;
  flex:none;
  width:10px;
  height:10px;
  background:var(--lime);
}

.section-en{
  margin-top:10px;
  font-size:13px;
  font-weight:500;
  letter-spacing:.35em;
  color:var(--muted);
}

/* ---------- gallery ---------- */

.carousel{
  position:relative;
  width:100%;
}

.carousel-frame{
  display:grid;
  grid-template-columns:1fr 3fr 1fr;
  gap:clamp(12px,1.6vw,26px);
  align-items:stretch;
}

.carousel-main{
  position:relative;
  margin:0;
  overflow:hidden;
  aspect-ratio:16/9;
}

.carousel-main img{
  width:100%;
  height:100%;
  object-fit:cover;
  display:block;
  background:#e9e9e9;
}

.carousel-side{
  position:relative;
  overflow:hidden;
}

.carousel-side img{
  position:absolute;
  inset:0;
  width:100%;
  height:100%;
  object-fit:cover;
  opacity:.5;
}

.carousel-dots{
  position:absolute;
  left:50%;
  bottom:clamp(10px,1.6vw,20px);
  transform:translateX(-50%);
  display:flex;
  gap:clamp(8px,1vw,14px);
  z-index:2;
}

.carousel-dot{
  width:12px;
  height:12px;
  padding:0;
  border-radius:50%;
  border:1.5px solid rgba(17,17,17,.75);
  background:#fff;
  cursor:pointer;
  transition:background .15s ease,border-color .15s ease;
}

.carousel-dot[aria-current="true"]{
  background:var(--lime);
  border-color:var(--lime);
}

.carousel-arrow{
  position:absolute;
  top:50%;
  width:clamp(40px,3.4vw,52px);
  aspect-ratio:1;
  display:grid;
  place-items:center;
  padding:0;
  border:2px solid var(--lime);
  border-radius:50%;
  background:#fff;
  color:var(--ink);
  cursor:pointer;
  transform:translate(-50%,-50%);
  transition:transform .18s ease;
  z-index:2;
}

.carousel-arrow svg{width:44%;height:44%}
.carousel-arrow--prev{left:20%}
.carousel-arrow--next{left:80%}
.carousel-arrow:hover{transform:translate(-50%,-50%) scale(1.06)}

/* ---------- gameplay ---------- */

.gameplay-grid{
  display:grid;
  grid-template-columns:.7fr 1fr 2.1fr;
  gap:clamp(28px,4vw,72px);
  align-items:start;
}

.timeline{position:relative}

.timeline::before{
  content:"";
  position:absolute;
  left:12px;
  top:14px;
  bottom:14px;
  width:1px;
  background:var(--line);
}

.timeline li{margin-bottom:clamp(28px,4.6vh,52px)}
.timeline li:last-child{margin-bottom:0}

.timeline-btn{
  position:relative;
  display:flex;
  align-items:center;
  gap:14px;
  width:100%;
  padding:0;
  border:0;
  background:none;
  text-align:left;
  cursor:pointer;
}

.dot{
  position:relative;
  z-index:1;
  flex:none;
  width:25px;
  height:25px;
  border:2px solid var(--ink);
  border-radius:50%;
  background:var(--paper);
  transition:background .18s ease,border-color .18s ease,transform .18s ease;
}

.timeline-btn[aria-pressed="true"] .dot{
  background:var(--lime);
  border-color:var(--lime);
  transform:scale(1.12);
}

.timeline-label{
  font-size:16px;
  color:var(--muted);
  transition:color .18s ease;
}

.timeline-btn[aria-pressed="true"] .timeline-label{
  color:var(--ink);
  font-weight:700;
}

.play-title{
  font-size:clamp(28px,2.6vw,42px);
  font-weight:900;
  line-height:1.2;
  margin-bottom:clamp(16px,2.4vh,28px);
}

.play-lines p{
  font-size:17px;
  color:#333;
  margin-bottom:10px;
}

.visual-slot{
  position:relative;
  overflow:hidden;
  width:100%;
  aspect-ratio:16/9;
  margin:0;
  border:2px solid rgba(200,245,74,.9);
  background:#e9e9e9;
  box-shadow:0 8px 16px -8px rgba(14,92,88,.45);
}

.visual-slot img{
  width:100%;
  height:100%;
  object-fit:cover;
  display:block;
}

.carousel-main picture,
.visual-slot picture,
.qr-card picture{display:contents}

/* ---------- rules ---------- */

#rules{
  align-items:center;
  text-align:center;
  padding-bottom:clamp(96px,14vh,180px);
}

.rules-head{
  display:flex;
  flex-direction:column;
  align-items:center;
  margin-bottom:clamp(40px,7vh,84px);
}

.rules-title-wrap{
  position:relative;
  display:grid;
  place-items:center;
}

.rules-ring{
  grid-area:1/1;
  width:min(280px,58vw);
  aspect-ratio:1;
  border:1.5px solid var(--lime);
  border-radius:50%;
}

.rules-title-inner{
  grid-area:1/1;
  position:relative;
  z-index:1;
  display:flex;
  flex-direction:column;
  align-items:center;
  gap:10px;
}

.rules-title{font-size:clamp(60px,7vw,110px)}

.rules-title-inner .section-en{margin-top:0}

.rules-list{
  position:relative;
  width:min(640px,100%);
  margin-inline:auto;
  text-align:left;
}

.rules-list::before{
  content:"";
  position:absolute;
  left:clamp(20px,1.7vw,24px);
  top:26px;
  bottom:26px;
  width:1px;
  background:rgba(200,245,74,.75);
}

.rules-list li{
  position:relative;
  z-index:1;
  display:flex;
  align-items:flex-start;
  gap:22px;
  padding-block:clamp(16px,2.4vh,26px);
}

.rules-list li:nth-child(4){margin-top:clamp(26px,4vh,44px)}

.rules-list li:nth-child(4)::before{
  content:"";
  position:absolute;
  left:clamp(20px,1.7vw,24px);
  top:calc(-1 * clamp(16px,2.4vh,26px));
  width:6px;
  height:6px;
  margin-left:-3px;
  background:var(--lime);
}

.index{
  flex:none;
  display:grid;
  place-items:center;
  width:clamp(40px,3.4vw,48px);
  aspect-ratio:1;
  border-radius:50%;
  background:var(--lime);
  color:#111;
  font-size:clamp(16px,1.3vw,19px);
  font-weight:700;
  line-height:1;
}

.rule-body{min-width:0;padding-top:8px}

.rule-body p{
  font-size:clamp(15px,1.25vw,17px);
  line-height:1.7;
  color:#333;
}

.rule-body p + p{margin-top:4px}

.rule-body .rule-text{
  font-size:clamp(18px,1.6vw,22px);
  font-weight:700;
  line-height:1.4;
  margin-bottom:8px;
  color:var(--ink);
}

.rules-updated{
  margin-top:clamp(28px,4vh,48px);
  font-size:13px;
  letter-spacing:.08em;
  color:var(--muted);
}

/* ---------- footer ---------- */

.site-footer{
  position:relative;
  z-index:1;
  padding:clamp(56px,8vh,96px) clamp(20px,5vw,72px) clamp(56px,8vh,96px);
  padding-left:max(clamp(20px,5vw,72px), env(safe-area-inset-left, 0px));
  padding-right:max(clamp(20px,5vw,72px), env(safe-area-inset-right, 0px));
  padding-bottom:max(clamp(56px,8vh,96px), env(safe-area-inset-bottom, 0px));
  border-top:1px solid var(--lime);
  background:transparent;
}

.footer-main{
  display:grid;
  grid-template-columns:1.1fr 2fr;
  gap:clamp(36px,5vw,80px);
  padding-bottom:clamp(48px,7vh,88px);
}

.footer-brand-name{
  font-size:clamp(38px,4vw,60px);
  font-weight:900;
  line-height:1.1;
}

.footer-brand-sub{
  margin-top:10px;
  font-size:14px;
  color:var(--muted);
}

.footer-brand .section-mark{margin-top:22px}

.footer-cols{
  display:grid;
  grid-template-columns:repeat(2,1fr);
  gap:clamp(20px,3vw,48px);
}

.footer-col h3{
  margin-bottom:18px;
  font-size:13px;
  font-weight:500;
  letter-spacing:.28em;
  color:var(--muted);
}

.footer-col li{margin-bottom:12px}

.footer-col a{
  font-size:16px;
  transition:opacity .15s ease;
}

.footer-col a:hover{text-decoration:underline}

.footer-legal{
  padding-top:clamp(20px,3vh,32px);
  border-top:1px solid var(--line);
  font-size:12.5px;
  line-height:1.9;
  color:var(--muted);
}

/* ---------- responsive ---------- */

@media (max-width:768px) and (orientation:portrait){
  :root{--nav-h:60px}

  body{font-size:16px}

  .site-nav{padding:0 18px}
  .brand{font-size:19px}
  .nav-links{gap:16px}
  .nav-links a{font-size:13.5px;padding:5px 1px}

  .hero-cards{
    flex-direction:column;
    align-items:stretch;
    gap:12px;
    padding:0 18px 24px;
    padding-bottom:max(24px, env(safe-area-inset-bottom, 0px));
  }

  .ip-card{width:auto;max-width:none}
  .ip-value{font-size:17px}
  .ip-kicker{gap:8px;white-space:nowrap}

  .copy-btn{
    width:46px;
    height:46px;
    margin-left:auto;
    padding:0;
    display:grid;
    place-items:center;
    background:transparent;
    color:#fff;
  }
  .copy-btn:hover{opacity:1}
  .copy-btn-text{display:none}
  .copy-btn-icon{width:24px;height:24px}
  .copy-btn-icon--copy{display:block}
  .copy-btn.is-copied .copy-btn-icon--copy{display:none}
  .copy-btn.is-copied .copy-btn-icon--check{display:block}

  .qr-card{
    flex-direction:row;
    align-items:center;
    justify-content:flex-start;
    gap:16px;
    text-align:left;
  }

  .qr-card img{width:92px}

  .section{padding:56px 18px;min-height:auto}
  .section-title{font-size:clamp(38px,11vw,56px)}

  .section-head{margin-bottom:clamp(24px,4vh,40px)}

  .carousel-frame{grid-template-columns:1fr;gap:0}
  .carousel-side{display:none}
  .carousel-arrow{width:38px;border-width:2px}
  .carousel-arrow--prev{left:30px}
  .carousel-arrow--next{left:calc(100% - 30px)}
  .carousel-dot{width:9px;height:9px;border-width:1.2px}

  .gameplay-grid{grid-template-columns:1fr;gap:34px}

  .timeline{display:grid;grid-template-columns:repeat(4,1fr);gap:8px}
  .timeline li{margin-bottom:0}
  .timeline::before{
    left:12px;
    right:12px;
    top:12px;
    bottom:auto;
    width:auto;
    height:1px;
  }
  .timeline-btn{flex-direction:column;align-items:flex-start;gap:9px}
  .timeline-label{font-size:12.5px}

  .rules-list li{gap:16px}
  .rule-body .rule-text{font-size:17px}
  .rule-body p{font-size:15px}

  .footer-main{grid-template-columns:1fr;gap:36px}
  .footer-cols{gap:16px}
  .footer-col h3{font-size:12px;letter-spacing:.2em;margin-bottom:12px}
  .footer-col li{margin-bottom:9px}
  .footer-col a{font-size:14px}
  .footer-legal{font-size:11.5px}

  .geo-narrow{display:none}
  .geo-marks{display:none}
}

@media (prefers-reduced-motion:reduce){
  html{scroll-behavior:auto}
  *,*::before,*::after{
    animation-duration:.001ms!important;
    transition-duration:.001ms!important;
  }
}