:root{
  --brand:#4d6bfe;
  --brand-hover:#3a56e0;
  --brand-50:#eef2ff;
  --brand-100:#dbe3ff;
  --ink:#0b1220;
  --text:#1c2434;
  --text-2:#4b5568;
  --text-3:#7c8798;
  --bg:#0b1220;
  --bg-soft:#f5f7fb;
  --line:#e3e8f0;
  --line-dark:rgba(255,255,255,.12);
  --r-sm:8px;
  --r-md:14px;
  --r-lg:22px;
  --r-pill:999px;
  --shadow:0 8px 28px rgba(16,26,48,.08);
  --shadow-lg:0 22px 60px rgba(16,26,48,.16);
  --wrap:1180px;
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{
  margin:0;
  font-family:-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Hiragino Sans GB","Microsoft YaHei",sans-serif;
  color:var(--text);
  background:#fff;
  line-height:1.65;
  -webkit-font-smoothing:antialiased;
}
a{color:inherit;text-decoration:none}
h1,h2,h3{margin:0;line-height:1.2;letter-spacing:-.01em}
p{margin:0}
.wrap{width:100%;max-width:var(--wrap);margin:0 auto;padding:0 24px}
.skip{position:absolute;left:-9999px;top:0;background:var(--brand);color:#fff;padding:10px 16px;z-index:99}
.skip:focus{left:12px;top:12px;border-radius:8px}

/* topbar */
.topbar{position:sticky;top:0;z-index:20;background:rgba(11,18,32,.86);backdrop-filter:blur(12px);border-bottom:1px solid var(--line-dark);color:#fff}
.topbar-inner{display:flex;align-items:center;gap:24px;height:66px}
.brand{display:flex;align-items:center;gap:10px;font-weight:700;font-size:17px;letter-spacing:.01em}
.brand-mark{width:30px;height:30px;color:var(--brand);flex:none}
.nav{display:flex;gap:26px;margin-left:auto;font-size:14.5px;color:rgba(255,255,255,.72)}
.nav a:hover{color:#fff}
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;background:var(--brand);color:#fff;border:1px solid transparent;border-radius:var(--r-pill);padding:12px 24px;font-size:15px;font-weight:600;transition:background .2s,transform .2s,box-shadow .2s;box-shadow:0 6px 18px rgba(77,107,254,.28)}
.btn:hover{background:var(--brand-hover);transform:translateY(-1px)}
.btn:focus-visible{outline:3px solid var(--brand-100);outline-offset:2px}
.btn-sm{padding:8px 18px;font-size:14px}
.btn-lg{padding:16px 34px;font-size:17px;background:#fff;color:var(--ink);box-shadow:0 10px 30px rgba(0,0,0,.18)}
.btn-lg:hover{background:var(--brand-50);color:var(--brand-hover)}
.btn-ghost{background:transparent;border-color:rgba(255,255,255,.3);color:#fff;box-shadow:none}
.btn-ghost:hover{background:rgba(255,255,255,.1);border-color:rgba(255,255,255,.55)}
.btn-card{margin-top:18px;align-self:flex-start;padding:10px 22px;font-size:14.5px}

/* hero */
.hero{background:radial-gradient(900px 520px at 82% -10%,rgba(77,107,254,.42),transparent 62%),radial-gradient(700px 460px at 10% 110%,rgba(77,107,254,.18),transparent 60%),var(--bg);color:#fff;padding:76px 0 88px;overflow:hidden}
.hero-inner{display:grid;grid-template-columns:1.15fr .85fr;gap:56px;align-items:center}
.eyebrow{display:inline-block;font-size:13px;letter-spacing:.12em;color:#9fb0ff;border:1px solid rgba(159,176,255,.35);border-radius:var(--r-pill);padding:5px 14px;margin-bottom:22px}
.hero h1{font-size:clamp(34px,4.2vw,54px);font-weight:800;letter-spacing:-.02em}
.hero .hl{background:linear-gradient(100deg,#8ea4ff,#4d6bfe 55%,#7fd7ff);-webkit-background-clip:text;background-clip:text;color:transparent}
.lede{margin-top:22px;max-width:34em;font-size:16.5px;color:rgba(255,255,255,.74)}
.hero-cta{display:flex;flex-wrap:wrap;gap:14px;margin-top:32px}
.hero-facts{display:flex;gap:40px;list-style:none;margin:42px 0 0;padding:0;border-top:1px solid var(--line-dark);padding-top:24px}
.hero-facts b{display:block;font-size:28px;font-weight:800;color:#fff;letter-spacing:-.02em}
.hero-facts span{font-size:13px;color:rgba(255,255,255,.6)}

/* hero board */
.hero-board{position:relative;background:rgba(255,255,255,.05);border:1px solid var(--line-dark);border-radius:var(--r-lg);padding:26px;box-shadow:var(--shadow-lg)}
.tile-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:8px}
.tile{aspect-ratio:1;border-radius:10px;background:rgba(255,255,255,.07);border:1px solid rgba(255,255,255,.07);display:flex;align-items:center;justify-content:center;font-weight:700;font-size:20px}
.t-a{background:rgba(77,107,254,.5);border-color:rgba(77,107,254,.7);color:#fff}
.t-b{background:rgba(127,215,255,.16);border-color:rgba(127,215,255,.35);color:#bfeaff}
.t-c{background:rgba(255,255,255,.14);border-color:rgba(255,255,255,.22);color:#fff}
.board-note{margin-top:18px;font-size:13.5px;color:rgba(255,255,255,.55)}

/* section heads */
.sec-head{max-width:640px;margin-bottom:40px}
.sec-head h2{font-size:clamp(26px,3vw,36px);font-weight:800;letter-spacing:-.02em}
.sec-head p{margin-top:14px;color:var(--text-2);font-size:16px}

/* games */
.games{padding:92px 0 96px;background:#fff}
.game-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:22px}
.game-card{display:flex;flex-direction:column;background:#fff;border:1px solid var(--line);border-radius:var(--r-lg);padding:26px;box-shadow:var(--shadow);transition:transform .22s,box-shadow .22s,border-color .22s}
.game-card:hover{transform:translateY(-4px);box-shadow:var(--shadow-lg);border-color:var(--brand-100)}
.game-card.featured{background:linear-gradient(160deg,var(--brand-50),#fff 62%);border-color:var(--brand-100)}
.game-top{display:flex;align-items:center;justify-content:space-between;margin-bottom:18px}
.g-icon{width:34px;height:34px;color:var(--brand)}
.tag{font-size:12px;color:var(--brand-hover);background:var(--brand-50);border:1px solid var(--brand-100);border-radius:var(--r-pill);padding:3px 11px;font-weight:600}
.game-shot{margin:0 0 18px;aspect-ratio:4/3;border:1px solid var(--line);border-radius:var(--r-md);background:linear-gradient(180deg,var(--brand-50),#f8faff);overflow:hidden}
.game-shot img{display:block;width:100%;height:100%;object-fit:cover;object-position:top center;transition:transform .35s ease}
.game-card:hover .game-shot img{transform:scale(1.03)}
.game-card h3{font-size:21px;font-weight:800}
.game-card p{margin-top:10px;color:var(--text-2);font-size:14.5px}
.game-meta{margin-top:auto;padding-top:18px;font-size:13px;color:var(--text-3);border-top:1px dashed var(--line)}

/* how */
.how{padding:92px 0;background:var(--bg-soft);border-top:1px solid var(--line);border-bottom:1px solid var(--line)}
.how-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:22px}
.how-card{background:#fff;border:1px solid var(--line);border-radius:var(--r-lg);padding:28px;box-shadow:var(--shadow)}
.step{display:inline-block;font-size:12.5px;font-weight:700;letter-spacing:.08em;color:var(--brand-hover);margin-bottom:14px}
.how-card h3{font-size:19px;font-weight:800}
.how-card p{margin-top:10px;color:var(--text-2);font-size:14.5px}
.hint{font-size:13px!important;color:var(--text-3)!important}
.text-link{display:inline-block;margin-top:16px;color:var(--brand-hover);font-weight:700;font-size:14.5px;border-bottom:1px solid var(--brand-100);padding-bottom:2px}
.text-link:hover{border-color:var(--brand-hover)}

/* why */
.why{padding:96px 0;background:#fff}
.why-inner{display:grid;grid-template-columns:1.2fr .8fr;gap:56px;align-items:center}
.why-copy h2{font-size:clamp(26px,3vw,36px);font-weight:800;letter-spacing:-.02em}
.why-copy>p{margin-top:16px;color:var(--text-2);font-size:16px;max-width:36em}
.why-list{list-style:none;margin:32px 0 0;padding:0;display:grid;gap:18px}
.why-list li{border-left:3px solid var(--brand);padding-left:16px}
.why-list b{display:block;font-size:15.5px}
.why-list span{font-size:14.5px;color:var(--text-2)}
.why-panel{background:var(--ink);border-radius:var(--r-lg);padding:30px;box-shadow:var(--shadow-lg);background-image:radial-gradient(420px 260px at 100% 0,rgba(77,107,254,.45),transparent 60%)}
.panel-row{display:flex;align-items:center;gap:12px;color:rgba(255,255,255,.86);font-size:15px;padding:13px 0;border-bottom:1px solid var(--line-dark)}
.panel-row:last-child{border-bottom:0}
.dot{width:8px;height:8px;border-radius:50%;background:var(--brand);box-shadow:0 0 0 4px rgba(77,107,254,.22);flex:none}

/* faq */
.faq{padding:92px 0;background:var(--bg-soft);border-top:1px solid var(--line)}
.faq-list{display:grid;gap:12px;max-width:820px}
.faq details{background:#fff;border:1px solid var(--line);border-radius:var(--r-md);padding:0 22px;box-shadow:var(--shadow)}
.faq summary{cursor:pointer;list-style:none;padding:20px 30px 20px 0;font-weight:700;font-size:16px;position:relative}
.faq summary::-webkit-details-marker{display:none}
.faq summary::after{content:"+";position:absolute;right:0;top:50%;transform:translateY(-50%);color:var(--brand);font-size:22px;font-weight:400;line-height:1}
.faq details[open] summary::after{content:"−"}
.faq details p{padding:0 0 20px;color:var(--text-2);font-size:15px;max-width:60em}

/* cta */
.cta{background:var(--bg);color:#fff;padding:72px 0;background-image:radial-gradient(700px 360px at 20% 0,rgba(77,107,254,.42),transparent 62%)}
.cta-inner{display:flex;align-items:center;justify-content:space-between;gap:32px;flex-wrap:wrap}
.cta h2{font-size:clamp(24px,2.8vw,34px);font-weight:800;letter-spacing:-.02em}
.cta p{margin-top:12px;color:rgba(255,255,255,.66);font-size:15.5px}

/* footer */
.foot{background:#080d17;color:rgba(255,255,255,.66);padding:44px 0;border-top:1px solid var(--line-dark)}
.foot-inner{display:flex;flex-wrap:wrap;align-items:center;gap:18px 32px}
.foot-brand{display:flex;align-items:center;gap:10px;color:#fff;font-weight:700;font-size:15.5px}
.foot-nav{display:flex;flex-wrap:wrap;gap:22px;margin-left:auto;font-size:14px}
.foot-nav a:hover{color:#fff}
.copy{flex-basis:100%;font-size:13px;color:rgba(255,255,255,.42);padding-top:16px;border-top:1px solid var(--line-dark)}

/* responsive */
@media (max-width:960px){
  .hero-inner{grid-template-columns:1fr;gap:44px}
  .hero-board{max-width:440px}
  .game-grid{grid-template-columns:repeat(2,1fr)}
  .how-grid{grid-template-columns:1fr}
  .why-inner{grid-template-columns:1fr;gap:36px}
}
@media (max-width:768px){
  .wrap{padding:0 18px}
  .nav{display:none}
  .topbar-inner{height:60px;gap:12px}
  .brand-text{font-size:15.5px}
  .hero{padding:52px 0 64px}
  .hero-facts{gap:26px;flex-wrap:wrap}
  .hero-facts b{font-size:24px}
  .game-grid{grid-template-columns:1fr}
  .games,.how,.why,.faq{padding:64px 0}
  .sec-head{margin-bottom:28px}
  .cta{padding:56px 0}
  .cta-inner{flex-direction:column;align-items:flex-start}
  .btn-lg{width:100%}
  .foot-nav{margin-left:0;gap:16px}
}