*{margin:0;padding:0;box-sizing:border-box}
body{background:#0a0a1a;color:#fff;font-family:system-ui,-apple-system,sans-serif;overflow-x:hidden;overflow-y:auto;user-select:none;-webkit-user-select:none;min-height:100vh}

/* ===== 菜单界面（可滚动） ===== */
#ui-overlay{position:relative;min-height:100vh;z-index:10}

.top-bar{position:sticky;top:0;z-index:50;display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;gap:8px 12px;padding:12px 16px;background:rgba(10,10,26,.96);border-bottom:1px solid rgba(255,255,255,.06)}
.logo{font-size:18px;font-weight:800;color:#4fc3f7;text-shadow:0 0 10px rgba(79,195,247,.5);white-space:nowrap}
.lang-nav{display:flex;flex-wrap:wrap;gap:6px;justify-content:flex-end;align-items:center;min-width:0}
.lang-nav a{color:#aaa;text-decoration:none;font-size:12px;padding:4px 8px;border-radius:6px;transition:color .15s,background .15s;white-space:nowrap}
.lang-nav a:hover{color:#fff;background:rgba(255,255,255,.08)}
.lang-nav a.active{color:#4fc3f7;background:rgba(79,195,247,.12);font-weight:700}
#games-count{font-size:12px;color:#888;white-space:nowrap}

.hero{padding:32px 20px 16px;text-align:center}
.hero h1{font-size:clamp(26px,6vw,40px);font-weight:800;color:#4fc3f7;text-shadow:0 0 20px rgba(79,195,247,.4);margin-bottom:12px;line-height:1.2}
.hero-desc{font-size:clamp(14px,3.5vw,17px);color:#b0b0c8;max-width:640px;margin:0 auto 20px;line-height:1.7;padding:0 4px}
.highlights{list-style:none;display:flex;flex-direction:column;gap:8px;max-width:640px;margin:0 auto;padding:0;text-align:left}
.highlights li{font-size:13px;color:#cfd0e8;background:rgba(255,255,255,.05);border:1px solid rgba(255,255,255,.08);border-radius:10px;padding:10px 14px;line-height:1.5;display:flex;align-items:center;gap:8px}
.highlights li::before{content:"\2713";color:#4fc3f7;font-weight:700;flex-shrink:0}

.game-grid{max-width:1000px;margin:8px auto 0;padding:16px;display:grid;grid-template-columns:1fr;gap:12px;justify-items:center}
.game-card{width:100%;max-width:420px;background:linear-gradient(135deg,#1a1a3a,#0f0f2a);border:1px solid #333;border-radius:12px;padding:16px;display:flex;align-items:center;gap:14px;cursor:pointer;transition:transform .15s,box-shadow .15s}
.game-card:active{transform:scale(.97);box-shadow:0 0 20px rgba(79,195,247,.4)}
.game-icon{width:56px;height:56px;border-radius:10px;display:flex;align-items:center;justify-content:center;font-size:28px;flex-shrink:0}
.game-info{flex:1;min-width:0}
.game-title{font-size:15px;font-weight:700;margin-bottom:3px}
.game-desc{font-size:11px;color:#888;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.play-badge{font-size:11px;color:#4fc3f7;border:1px solid #4fc3f7;border-radius:4px;padding:2px 8px;flex-shrink:0}
.section-title{font-size:13px;color:#666;text-transform:uppercase;letter-spacing:1px;margin-bottom:4px}

.faq-section{max-width:640px;margin:24px auto 40px;padding:0 16px}
.faq-section h2{font-size:22px;font-weight:800;color:#fff;text-align:center;margin-bottom:16px}
.faq-section details{background:rgba(255,255,255,.04);border:1px solid rgba(255,255,255,.1);border-radius:12px;margin-bottom:10px;overflow:hidden;transition:border-color .15s}
.faq-section details[open]{border-color:rgba(79,195,247,.5)}
.faq-section summary{cursor:pointer;padding:14px 16px;font-size:14px;font-weight:600;color:#e8e8f5;list-style:none;position:relative;transition:color .15s}
.faq-section summary::-webkit-details-marker{display:none}
.faq-section summary::after{content:"+";position:absolute;right:16px;top:50%;transform:translateY(-50%);color:#4fc3f7;font-size:18px;font-weight:700;transition:transform .2s}
.faq-section details[open] summary::after{transform:translateY(-50%) rotate(45deg)}
.faq-section summary:hover{color:#4fc3f7}
.faq-section details p{padding:0 16px 14px;font-size:13px;color:#a0a0b8;line-height:1.7;margin:0}

footer{max-width:640px;margin:0 auto 30px;padding:20px 16px;text-align:center;border-top:1px solid rgba(255,255,255,.08);color:#888}
footer nav{display:flex;flex-wrap:wrap;gap:10px;justify-content:center;font-size:12px}
footer nav a{color:#aaa;text-decoration:none;transition:color .15s}
footer nav a:hover{color:#4fc3f7}

/* ===== 游戏界面（全屏覆盖） ===== */
#game-canvas{display:block;width:100vw;height:100vh;touch-action:none}
#game-container{position:fixed;top:0;left:0;width:100%;height:100%;z-index:20;display:none;background:#0a0a1a}
#back-btn{position:fixed;top:12px;left:12px;z-index:30;background:rgba(0,0,0,.7);color:#4fc3f7;border:1px solid #4fc3f7;border-radius:8px;padding:8px 14px;font-size:13px;cursor:pointer;pointer-events:auto;display:none}
.game-header{position:fixed;top:12px;right:12px;z-index:30;display:flex;gap:8px;pointer-events:auto;display:none}
.ctrl-btn{background:rgba(0,0,0,.7);color:#fff;border:1px solid #555;border-radius:8px;padding:8px 12px;font-size:12px;cursor:pointer}
#game-title-display{position:fixed;top:14px;left:50%;transform:translateX(-50%);z-index:30;font-size:16px;font-weight:700;color:#4fc3f7;display:none}
.score-bar{position:fixed;bottom:20px;left:50%;transform:translateX(-50%);z-index:30;display:flex;gap:16px;display:none}
.score-item{text-align:center}
.score-label{font-size:10px;color:#888;text-transform:uppercase}
.score-value{font-size:20px;font-weight:800;color:#ffd54f}
#overlay{position:fixed;top:0;left:0;width:100%;height:100%;background:rgba(0,0,0,.85);display:flex;flex-direction:column;align-items:center;justify-content:center;z-index:40;display:none}
#overlay h2{font-size:28px;margin-bottom:8px;color:#4fc3f7}
#overlay p{font-size:14px;color:#aaa;margin-bottom:20px;text-align:center;padding:0 20px}
#overlay button{background:#4fc3f7;color:#0a0a1a;border:none;border-radius:10px;padding:12px 32px;font-size:16px;font-weight:700;cursor:pointer}
#dpad{position:fixed;bottom:20px;left:20px;z-index:30;display:none;pointer-events:auto}
.dpad-btn{width:48px;height:48px;background:rgba(255,255,255,.15);border:1px solid rgba(255,255,255,.3);border-radius:8px;color:#fff;font-size:20px;display:flex;align-items:center;justify-content:center;cursor:pointer;position:absolute}
.dpad-up{left:48px;top:0}.dpad-down{left:48px;top:96px}.dpad-left{left:0;top:48px}.dpad-right{left:96px;top:48px}
#action-btn{position:fixed;bottom:40px;right:30px;width:64px;height:64px;background:rgba(79,195,247,.3);border:2px solid #4fc3f7;border-radius:50%;color:#fff;font-size:14px;font-weight:700;display:flex;align-items:center;justify-content:center;cursor:pointer;z-index:30;display:none;pointer-events:auto}

/* ===== 响应式 ===== */
@media(min-width:720px){
  .game-grid{grid-template-columns:repeat(2,1fr)}
}
@media(min-width:1024px){
  .game-grid{grid-template-columns:repeat(3,1fr)}
}
@media(max-width:600px){
  .top-bar{flex-wrap:wrap;align-items:center;gap:4px 12px;padding:10px 12px}
  .logo{font-size:15px;flex-shrink:0}
  #games-count{order:2;margin-left:auto;font-size:11px;flex-shrink:0}
  .lang-nav{order:3;flex-basis:100%;flex-wrap:nowrap;overflow-x:auto;-webkit-overflow-scrolling:touch;justify-content:flex-start;scrollbar-width:none;min-width:0;padding-bottom:2px}
  .lang-nav::-webkit-scrollbar{display:none}
  .game-card{padding:12px}
  .game-icon{width:48px;height:48px;font-size:24px}
}