*{margin:0;padding:0;box-sizing:border-box}body{font-family:Microsoft YaHei,PingFang SC,sans-serif;background:linear-gradient(135deg,#e8f4f8,#d4e5ed,#c9dde8);min-height:100vh;min-height:100dvh;display:flex;justify-content:center;align-items:center;padding:8px;touch-action:none;-webkit-user-select:none;user-select:none;overflow:hidden;position:fixed;top:0;left:0;right:0;bottom:0}body:before{content:"";position:fixed;top:0;left:0;width:100%;height:100%;background:radial-gradient(circle at 20% 80%,rgba(102,126,234,.1) 0%,transparent 50%),radial-gradient(circle at 80% 20%,rgba(0,200,200,.1) 0%,transparent 50%),radial-gradient(circle at 40% 40%,rgba(200,100,200,.08) 0%,transparent 40%);pointer-events:none;z-index:0}.game-container{background:#fffffff2;border-radius:20px;padding:12px;box-shadow:0 20px 60px #00000026,0 0 80px #667eea1a;width:100%;max-width:380px;position:relative;z-index:1;border:1px solid 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shimmer{0%{transform:translate(-100%) rotate(45deg)}to{transform:translate(100%) rotate(45deg)}}.info-panel .label{font-size:.7rem;opacity:.9;text-transform:uppercase;letter-spacing:1px}.info-panel .value{font-size:1.4rem;font-weight:700;text-shadow:0 2px 4px rgba(0,0,0,.2)}.score-display .value{color:#a5f3fc}.level-display .value{color:#fef08a}.lines-display .value{color:#86efac}.game-area{display:flex;flex-direction:column;align-items:center;gap:10px}.top-panels{display:flex;gap:10px;width:100%;justify-content:center}.next-piece-panel,.power-up-panel{background:linear-gradient(135deg,#f8fafc,#e2e8f0);padding:10px;border-radius:12px;border:1px solid rgba(148,163,184,.3);box-shadow:0 4px 15px #00000014;flex:1;max-width:140px}.panel-title{display:block;font-weight:700;color:#667eea;margin-bottom:8px;text-align:center;font-size:.85rem;text-transform:uppercase;letter-spacing:1px}#next-canvas{display:block;margin:0 auto;background:linear-gradient(180deg,#f8fafc,#cbd5e1);border-radius:8px;border:1px solid rgba(100,116,139,.3);box-shadow:inset 0 2px 8px #0000001a;width:100px;height:100px}.power-up-btn{width:100%;padding:12px;font-size:.9rem;background:linear-gradient(135deg,#f59e0b,#ef4444,#f59e0b);background-size:200% auto;color:#fff;border:none;border-radius:12px;cursor:pointer;transition:all .3s ease;display:flex;flex-direction:column;align-items:center;gap:3px;box-shadow:0 6px 20px #f59e0b4d;position:relative;overflow:hidden}.power-up-btn:before{content:"";position:absolute;top:-50%;left:-50%;width:200%;height:200%;background:radial-gradient(circle,rgba(255,255,255,.3) 0%,transparent 70%);opacity:0;transition:opacity .3s}.power-up-btn:not(:disabled):active:before{opacity:1}.power-up-btn:not(:disabled):active{transform:scale(.95);box-shadow:0 4px 15px #f59e0b66}.power-up-btn:not(:disabled){animation:powerUpGlow 2s ease-in-out infinite}@keyframes powerUpGlow{0%,to{box-shadow:0 6px 20px #f59e0b4d}50%{box-shadow:0 6px 30px #f59e0b80}}.power-up-btn:disabled{background:linear-gradient(135deg,#94a3b8,#64748b);cursor:not-allowed;opacity:.7}.power-up-btn .icon{font-size:1.5rem}.power-up-btn .count{font-size:.85rem;font-weight:700;text-shadow:0 2px 5px rgba(0,0,0,.2)}.game-board{position:relative;background:linear-gradient(180deg,#f8fafc,#e2e8f0,#cbd5e1);border-radius:12px;padding:6px;box-shadow:inset 0 2px 10px #0000001a,0 4px 20px #0000001a;border:2px solid rgba(100,116,139,.3);overflow:hidden}.game-board:before{content:"";position:absolute;top:0;left:0;right:0;bottom:0;background:linear-gradient(90deg,rgba(100,116,139,.1) 1px,transparent 1px),linear-gradient(rgba(100,116,139,.1) 1px,transparent 1px);background-size:30px 30px;pointer-events:none;z-index:1}#game-canvas{display:block;border-radius:8px;position:relative;z-index:2;width:280px;height:560px}.overlay{position:absolute;top:0;left:0;right:0;bottom:0;background:linear-gradient(180deg,#f8fafcfa,#cbd5e1fa);display:flex;flex-direction:column;justify-content:center;align-items:center;border-radius:12px;color:#334155;text-align:center;z-index:10;-webkit-backdrop-filter:blur(10px);backdrop-filter:blur(10px);animation:overlayFadeIn .5s ease}@keyframes overlayFadeIn{0%{opacity:0;transform:scale(.9)}to{opacity:1;transform:scale(1)}}.overlay.hidden{display:none}.overlay h2{font-size:1.8rem;margin-bottom:15px;background:linear-gradient(135deg,#f59e0b,#dc2626,#f59e0b);-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text;animation:textShine 2s linear infinite;background-size:200% auto}@keyframes textShine{to{background-position:200% center}}.overlay p{font-size:1rem;margin-bottom:8px;color:#64748b}.overlay button{padding:14px 40px;font-size:1.1rem;background:linear-gradient(135deg,#667eea,#764ba2);color:#fff;border:none;border-radius:40px;cursor:pointer;transition:all .3s ease;margin-top:15px;box-shadow:0 8px 25px #667eea4d;font-weight:700;letter-spacing:2px;text-transform:uppercase;position:relative;overflow:hidden}.overlay button:before{content:"";position:absolute;top:0;left:-100%;width:100%;height:100%;background:linear-gradient(90deg,transparent,rgba(255,255,255,.3),transparent);transition:left .5s}.overlay button:active:before{left:100%}.overlay button:active{transform:scale(.95)}.mobile-controls{display:flex;flex-direction:column;gap:8px;width:100%}.mobile-row{display:flex;gap:8px;justify-content:center}.mobile-btn{padding:14px 24px;font-size:1.3rem;background:linear-gradient(135deg,#3b82f6,#2563eb);color:#fff;border:none;border-radius:12px;cursor:pointer;min-width:70px;transition:all .15s ease;touch-action:manipulation;box-shadow:0 4px 15px #3b82f64d;border:1px solid rgba(255,255,255,.2);font-weight:700;-webkit-tap-highlight-color:transparent}.mobile-btn.large{flex:1;max-width:140px;font-size:.9rem}.mobile-btn:active{transform:scale(.92);box-shadow:0 2px 8px #3b82f64d}.line-clear-effect{position:absolute;top:0;left:0;right:0;bottom:0;pointer-events:none;z-index:5}.particle{position:absolute;width:8px;height:8px;border-radius:50%;pointer-events:none;animation:particleFly 1s ease-out forwards}@keyframes particleFly{0%{opacity:1;transform:scale(1)}to{opacity:0;transform:scale(0) translateY(-80px)}}.score-popup{position:absolute;color:#3b82f6;font-size:1.2rem;font-weight:700;text-shadow:0 2px 8px rgba(59,130,246,.4);pointer-events:none;animation:scoreFloat 1s ease-out forwards;z-index:20}@keyframes scoreFloat{0%{opacity:1;transform:translateY(0) scale(1)}to{opacity:0;transform:translateY(-40px) scale(1.5)}}@media (prefers-reduced-motion: reduce){*,*:before,*:after{animation-duration:.01ms!important;animation-iteration-count:1!important;transition-duration:.01ms!important}}