*{box-sizing:border-box}
:root{
  --primary:#2979ff;
  --primary2:#3d8cff;
  --ink:#111827;
  --text:#647181;
  --line:#e8edf2;
  --soft:#f7f9fc;
  --dark:#0f1722;
}
html{scroll-behavior:smooth}
body{margin:0;font-family:Arial,"Microsoft YaHei","PingFang SC",sans-serif;color:var(--ink);background:#fff;-webkit-font-smoothing:antialiased}
a{text-decoration:none;color:inherit}
img{display:block;max-width:100%}
button{font:inherit}
.wrap{width:min(1180px,calc(100% - 32px));margin:0 auto}

/* HEADER */
.header{position:fixed;top:0;left:0;right:0;background:rgba(255,255,255,.97);z-index:50;border-bottom:1px solid #edf1f5}
.nav-inner{height:68px;display:flex;align-items:center}
.brand{display:flex;align-items:center;gap:9px}
.brand-logo{width:38px;height:38px;object-fit:contain}
.brand-fallback{display:none;width:38px;height:38px;border-radius:9px;align-items:center;justify-content:center;background:var(--primary);color:#fff;font-weight:900}
.brand-text{font-size:20px;font-weight:900;color:#1d4ed8}
.desktop-nav{margin-left:auto;display:flex;gap:30px;font-size:14px;color:#66717f}
.desktop-nav a:hover,.desktop-nav .active{color:var(--primary)}
.header-btn{margin-left:28px;background:var(--primary);color:#fff;padding:11px 22px;border-radius:6px;font-size:14px;font-weight:800;box-shadow:0 8px 20px rgba(41,121,255,.18)}
.menu-btn{display:none;margin-left:auto;border:0;background:none;font-size:26px;color:#334155}
.mobile-menu{display:none}

/* HERO */
.hero{padding:120px 0 82px;background:linear-gradient(180deg,#f8fbff 0%,#fff 82%)}
.hero-grid{display:grid;grid-template-columns:1.05fr .95fr;gap:70px;align-items:center;min-height:560px}
.hero-label{display:inline-block;padding:8px 13px;border-radius:4px;background:#eaf2ff;color:#2563eb;font-size:13px;font-weight:800;margin-bottom:20px}
.hero h1{font-size:clamp(46px,5vw,68px);line-height:1.04;letter-spacing:-.05em;margin:0 0 24px}
.hero h1 span{display:block;color:var(--primary)}
.hero-copy>p{max-width:580px;font-size:16px;line-height:1.85;color:#697586;margin:0}
.hero-downloads{display:flex;gap:14px;margin-top:30px}
.download-btn{min-width:230px;display:flex;align-items:center;gap:12px;padding:14px 18px;border-radius:7px;color:#fff;box-shadow:0 12px 26px rgba(15,23,42,.12)}
.download-btn.android{background:#101827}
.download-btn.ios{background:var(--primary)}
.download-icon{width:40px;height:40px;border-radius:8px;background:rgba(255,255,255,.12);display:grid;place-items:center;font-weight:900;font-size:18px}
.download-btn small{display:block;font-size:9px;letter-spacing:.12em;opacity:.72;margin-bottom:2px}
.download-btn strong{display:block;font-size:15px}
.hero-meta{display:flex;gap:10px;flex-wrap:wrap;margin-top:25px}
.hero-meta span{font-size:11px;color:#748091;border:1px solid #dfe6ef;padding:7px 10px;border-radius:4px;background:#fff}

.hero-phone-stage{position:relative;display:flex;justify-content:center;min-height:520px;align-items:center}
.back-circle{position:absolute;border-radius:50%}
.back-circle.one{width:410px;height:410px;background:#e9f2ff}
.back-circle.two{width:300px;height:300px;background:#d9e8ff}
.phone{position:relative;width:285px;height:500px;border:8px solid #111827;border-radius:38px;background:#111827;padding:11px;box-shadow:0 35px 65px rgba(15,23,42,.22)}
.phone-notch{position:absolute;top:13px;left:50%;transform:translateX(-50%);width:75px;height:7px;border-radius:999px;background:#273244}
.phone-screen{height:100%;border-radius:26px;background:linear-gradient(160deg,#0f1722,#1b2a40);color:#fff;padding:56px 24px 24px}
.app-mark{width:80px;height:80px;border-radius:18px;background:#fff;overflow:hidden;margin:0 auto 14px;display:grid;place-items:center;position:relative}
.app-mark img{width:100%;height:100%;object-fit:cover;position:relative;z-index:2}
.app-mark span{display:none;color:#111827;font-size:27px;font-weight:900}
.phone-screen>strong{display:block;text-align:center;font-size:29px}
.phone-screen>small{display:block;text-align:center;color:#76a8ff;font-size:9px;letter-spacing:.14em;margin-top:4px}
.phone-games{display:grid;gap:9px;margin-top:28px}
.phone-games div{display:flex;align-items:center;gap:10px;padding:12px;background:rgba(255,255,255,.06);border:1px solid rgba(255,255,255,.06);border-radius:8px}
.phone-games i{width:28px;height:28px;display:grid;place-items:center;background:#213657;color:#7fb1ff;border-radius:6px;font-style:normal}
.phone-games span{font-size:12px}

/* SHARED */
.section{padding:82px 0}
.section-heading{text-align:center;max-width:720px;margin:0 auto 46px}
.section-heading>span{font-size:13px;font-weight:800;color:var(--primary)}
.section-heading h2{font-size:clamp(30px,3.5vw,44px);margin:10px 0 12px;letter-spacing:-.035em}
.section-heading p{font-size:15px;line-height:1.8;color:#737f8d;margin:0}

/* FEATURES */
.features{background:#fff}
.feature-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:22px}
.feature-grid article{padding:28px 25px;border:1px solid var(--line);background:#fff;min-height:220px;transition:.25s}
.feature-grid article:hover{transform:translateY(-4px);box-shadow:0 18px 40px rgba(15,23,42,.07)}
.feature-icon{width:52px;height:52px;border-radius:8px;background:#eef4ff;color:var(--primary);display:grid;place-items:center;font-size:24px;font-weight:900;margin-bottom:18px}
.feature-grid h3{font-size:19px;margin:0 0 10px}
.feature-grid p{font-size:14px;line-height:1.75;color:#6d7885;margin:0}

/* STATS */
.stats-section{background:var(--primary);color:#fff}
.stats-grid{display:grid;grid-template-columns:repeat(4,1fr)}
.stats-grid>div{text-align:center;padding:30px 10px;border-right:1px solid rgba(255,255,255,.18)}
.stats-grid>div:last-child{border-right:0}
.stats-grid strong{display:block;font-size:35px;margin-bottom:5px}
.stats-grid span{font-size:13px;color:#dbe8ff}

/* EXPERIENCE */
.games{background:var(--soft)}
.experience-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:22px}
.experience-grid article{padding:28px;background:#fff;border:1px solid var(--line)}
.exp-head{display:flex;align-items:center;justify-content:space-between;margin-bottom:28px}
.exp-head span{font-size:25px;color:var(--primary);font-weight:900}
.exp-head small{font-size:9px;letter-spacing:.14em;color:#9aa5b2}
.experience-grid h3{font-size:20px;margin:0 0 12px}
.experience-grid p{margin:0;color:#6e7987;font-size:14px;line-height:1.8}

/* DEVICE */
.device-section{padding:82px 0;background:#111827;color:#fff}
.device-layout{display:grid;grid-template-columns:.8fr 1.2fr;gap:70px}
.device-copy>span{font-size:12px;color:#76a8ff;font-weight:800}
.device-copy h2{font-size:clamp(32px,4vw,48px);line-height:1.1;margin:10px 0 16px}
.device-copy p{margin:0;color:#9ca8b7;line-height:1.8;font-size:15px}
.device-list{border-top:1px solid #2c3747}
.device-row{display:flex;align-items:center;justify-content:space-between;padding:20px 0;border-bottom:1px solid #2c3747}
.device-row b{display:block;font-size:18px}
.device-row span{display:block;font-size:12px;color:#7f8c9d;margin-top:4px}
.device-row a{color:#79a9ff;font-size:13px;font-weight:800}

/* FAQ */
.faq-section{background:#fff}
.faq-wrap{max-width:840px}
.faq-list{display:grid;gap:10px}
.faq-item{border:1px solid var(--line)}
.faq-item button{width:100%;border:0;background:#fff;padding:20px 22px;display:flex;align-items:center;justify-content:space-between;text-align:left;font-weight:800;color:#172033;cursor:pointer}
.faq-item button b{font-size:20px;color:var(--primary);transition:.2s}
.faq-answer{max-height:0;overflow:hidden;transition:.3s}
.faq-answer p{margin:0;padding:0 22px 20px;color:#6f7b88;line-height:1.8;font-size:14px}
.faq-item.active .faq-answer{max-height:220px}
.faq-item.active button b{transform:rotate(45deg)}

/* FINAL CTA */
.final-cta{padding:70px 0;background:#eef4ff}
.final-inner{display:flex;align-items:center;justify-content:space-between;gap:60px}
.final-inner>div:first-child>span{font-size:12px;color:var(--primary);font-weight:800}
.final-inner h2{font-size:clamp(30px,4vw,46px);margin:8px 0 9px}
.final-inner p{margin:0;color:#6f7c8a}
.final-buttons{display:flex;gap:12px}
.final-buttons a{padding:14px 22px;border-radius:5px;font-weight:800;font-size:14px}
.final-primary{background:var(--primary);color:#fff}
.final-secondary{background:#fff;color:var(--primary);border:1px solid #cdddfb}

/* FOOTER */
.footer{background:#0f1722;color:#8f9aaa;padding:56px 0 26px}
.footer-grid{display:grid;grid-template-columns:1.45fr repeat(3,1fr);gap:55px}
.footer-grid>div:first-child{max-width:430px}
.footer strong{color:#fff;font-size:20px}
.footer p{font-size:13px;line-height:1.8}
.footer h3{font-size:12px;color:#c6d0dc;margin:0 0 16px}
.footer-grid>div:not(:first-child){display:flex;flex-direction:column;gap:9px}
.footer a{font-size:13px}
.footer a:hover{color:#fff}
.copyright{border-top:1px solid #273243;margin-top:35px;padding-top:20px;display:flex;justify-content:space-between;font-size:11px;color:#667384}

/* RESPONSIVE */
@media(max-width:960px){
  .desktop-nav,.header-btn{display:none}
  .menu-btn{display:block}
  .mobile-menu{position:fixed;top:68px;left:0;right:0;background:#fff;border-bottom:1px solid var(--line);display:none;flex-direction:column;gap:15px;padding:18px 20px}
  .mobile-menu.open{display:flex}
  .mobile-download{background:var(--primary);color:#fff!important;padding:12px;text-align:center}
  .hero-grid{grid-template-columns:1fr;gap:45px}
  .hero-phone-stage{min-height:520px}
  .feature-grid,.experience-grid{grid-template-columns:repeat(2,1fr)}
  .device-layout{grid-template-columns:1fr;gap:40px}
  .final-inner{flex-direction:column;align-items:flex-start}
  .footer-grid{grid-template-columns:repeat(2,1fr)}
}

@media(max-width:680px){
  .wrap{width:min(100% - 24px,1180px)}
  .hero{padding-top:104px}
  .hero-grid{min-height:0}
  .hero h1{font-size:43px}
  .hero-downloads{flex-direction:column}
  .download-btn{width:100%}
  .hero-phone-stage{min-height:500px}
  .feature-grid,.experience-grid{grid-template-columns:1fr}
  .stats-grid{grid-template-columns:repeat(2,1fr)}
  .stats-grid>div:nth-child(2){border-right:0}
  .stats-grid>div:nth-child(-n+2){border-bottom:1px solid rgba(255,255,255,.18)}
  .final-buttons{width:100%;flex-direction:column}
  .final-buttons a{width:100%;text-align:center}
  .footer-grid{grid-template-columns:1fr}
  .copyright{flex-direction:column;gap:8px}
}