*{margin:0;padding:0;box-sizing:border-box}:root{--primary-color: #d63031;--secondary-color: #ff7675;--correct-color: #00b894;--wrong-color: #fdcb6e;--card-bg: rgba(255, 255, 255, .95);--text-dark: #2d3436;--text-light: #636e72;--lantern-red: #e74c3c;--lantern-gold: #f1c40f}body{font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,Helvetica Neue,Arial,sans-serif;min-height:100vh;background:linear-gradient(135deg,#1a1a2e,#16213e,#0f3460 60%,#1a1a2e);background-size:400% 400%;animation:gradientShift 15s ease infinite}@keyframes gradientShift{0%{background-position:0% 50%}50%{background-position:100% 50%}to{background-position:0% 50%}}.app{min-height:100vh;display:flex;flex-direction:column;position:relative}.app:before{content:"";position:fixed;top:0;left:0;right:0;bottom:0;background-image:radial-gradient(2px 2px at 20px 30px,rgba(255,255,255,.9),transparent),radial-gradient(3px 3px at 40px 70px,rgba(255,220,180,.8),transparent),radial-gradient(2px 2px at 90px 40px,rgba(200,220,255,.9),transparent),radial-gradient(2px 2px at 160px 120px,rgba(255,255,255,.7),transparent),radial-gradient(1px 1px at 230px 80px,rgba(255,200,150,.8),transparent),radial-gradient(2px 2px at 300px 150px,rgba(180,200,255,.7),transparent),radial-gradient(3px 3px at 370px 50px,rgba(255,255,255,.6),transparent),radial-gradient(2px 2px at 450px 180px,rgba(255,230,200,.8),transparent),radial-gradient(1px 1px at 520px 90px,rgba(220,240,255,.9),transparent),radial-gradient(2px 2px at 600px 130px,rgba(255,255,255,.8),transparent),radial-gradient(1px 1px at 100px 200px,rgba(255,200,200,.6),transparent),radial-gradient(2px 2px at 250px 250px,rgba(200,255,220,.5),transparent),radial-gradient(1px 1px at 400px 100px,rgba(255,255,200,.7),transparent),radial-gradient(2px 2px at 550px 220px,rgba(220,200,255,.6),transparent);background-size:650px 300px;animation:twinkle 4s ease-in-out infinite;pointer-events:none;z-index:0}.app:after{content:"🌙 ⭐ ✨ 🌟 💫";position:fixed;top:0;left:0;right:0;bottom:0;font-size:24px;letter-spacing:80px;line-height:150px;word-spacing:100px;opacity:.15;animation:floatEmoji 20s linear infinite;pointer-events:none;z-index:0;white-space:nowrap;overflow:hidden}@keyframes floatEmoji{0%{transform:translate(0) translateY(0)}25%{transform:translate(-30px) translateY(20px)}50%{transform:translate(0) translateY(40px)}75%{transform:translate(30px) translateY(20px)}to{transform:translate(0) translateY(0)}}@keyframes twinkle{0%,to{opacity:1}50%{opacity:.5}}.start-screen{min-height:100vh;display:flex;align-items:flex-start;justify-content:center;padding:20px;position:relative;z-index:1;overflow-y:auto}.start-content{background:linear-gradient(135deg,#fffffff2,#fff0e6f2);border-radius:24px;padding:40px;text-align:center;box-shadow:0 20px 60px #0000004d;max-width:400px;width:100%;border:3px solid var(--lantern-gold);margin:20px 0}.game-title{font-size:2.5rem;color:var(--primary-color);margin-bottom:30px;display:flex;align-items:center;justify-content:center;gap:10px;text-shadow:2px 2px 4px rgba(0,0,0,.1)}.title-icon{font-size:2rem}.game-rules{background:linear-gradient(135deg,#fff5f5,#ffe8e8);border-radius:16px;padding:20px;margin-bottom:24px;text-align:left;border:2px solid rgba(231,76,60,.2)}.game-rules h3{color:var(--text-dark);margin-bottom:12px;font-size:1.1rem}.game-rules ul{list-style:none}.game-rules li{display:flex;align-items:center;gap:10px;padding:8px 0;color:var(--text-light);font-size:.95rem}.rule-icon{font-size:1.2rem}.high-score-display{background:linear-gradient(135deg,#fff3cd,#ffeeba);border-radius:12px;padding:12px 20px;margin-bottom:24px;font-size:1.1rem;color:var(--text-dark);border:2px solid var(--lantern-gold)}.crown{font-size:1.3rem}.start-button{background:linear-gradient(135deg,var(--primary-color) 0%,#c0392b 100%);color:#fff;border:none;border-radius:50px;padding:16px 48px;font-size:1.3rem;font-weight:600;cursor:pointer;transition:transform .2s,box-shadow .2s;box-shadow:0 8px 24px #d6303166}.start-button:hover{transform:translateY(-2px);box-shadow:0 12px 32px #d6303180}.start-button:active{transform:translateY(0)}.game-container{min-height:100vh;display:flex;flex-direction:column;position:relative;z-index:1}.game-header{display:flex;justify-content:space-between;align-items:center;padding:16px 24px;background:#0000004d;-webkit-backdrop-filter:blur(10px);backdrop-filter:blur(10px)}.score{display:flex;flex-direction:column;align-items:center}.score-label{color:#fffc;font-size:.9rem}.score-value{color:var(--lantern-gold);font-size:2rem;font-weight:700;text-shadow:0 0 10px rgba(241,196,15,.5)}.timer{display:flex;align-items:center;gap:12px}.timer-bar{width:120px;height:12px;background:#fff3;border-radius:6px;overflow:hidden}.timer-fill{height:100%;background:linear-gradient(90deg,#00b894,#55efc4);border-radius:6px;transition:width 1s linear}.timer.low .timer-fill{background:linear-gradient(90deg,#e17055,#ff7675);animation:pulse .5s ease-in-out infinite}.timer-text{color:#fff;font-size:1.5rem;font-weight:600;min-width:60px}.timer.low .timer-text{color:#ff7675;animation:pulse .5s ease-in-out infinite}@keyframes pulse{0%,to{opacity:1}50%{opacity:.6}}.game-area{flex:1;position:relative;overflow:hidden}.game-hint{position:absolute;top:20px;left:50%;transform:translate(-50%);color:#fffc;font-size:1rem;text-align:center;text-shadow:0 2px 4px rgba(0,0,0,.3)}.hint-correct{color:#55efc4;font-weight:600}.lantern{position:absolute;top:-180px;transform:translate(-50%);cursor:pointer;-webkit-user-select:none;user-select:none;-webkit-tap-highlight-color:transparent;display:flex;flex-direction:column;align-items:center;transition:transform .1s;filter:drop-shadow(0 10px 20px rgba(231,76,60,.4))}.lantern:hover{transform:translate(-50%) scale(1.08)}.lantern:active{transform:translate(-50%) scale(.95)}.lantern.falling{animation:fall linear forwards}@keyframes fall{0%{top:-180px}to{top:calc(100vh - 50px)}}.lantern-top{width:20px;height:15px;background:linear-gradient(180deg,#f1c40f,#d4a600);border-radius:4px 4px 0 0;position:relative}.lantern-top:before{content:"";position:absolute;top:-8px;left:50%;transform:translate(-50%);width:30px;height:10px;border:3px solid #d4a600;border-bottom:none;border-radius:15px 15px 0 0}.lantern-body{width:120px;height:90px;background:linear-gradient(180deg,#e74c3c,#c0392b,#a93226);border-radius:50%;display:flex;align-items:center;justify-content:center;position:relative;border:3px solid #f1c40f;box-shadow:inset 0 -20px 30px #0003,inset 0 20px 30px #ffffff1a}.lantern-glow{position:absolute;top:-10px;right:-10px;bottom:-10px;left:-10px;background:radial-gradient(ellipse at center,rgba(255,200,100,.3) 0%,transparent 70%);border-radius:50%;animation:glow 2s ease-in-out infinite;pointer-events:none}@keyframes glow{0%,to{opacity:.6;transform:scale(1)}50%{opacity:1;transform:scale(1.1)}}.question-content{display:flex;align-items:center;justify-content:center;white-space:nowrap}.expression{font-size:1.3rem;font-weight:700;color:#fff5e6;text-shadow:0 2px 4px rgba(0,0,0,.3);letter-spacing:1px}.expression.crossed{text-decoration:line-through;opacity:.6}.correct-answer{font-size:1.2rem;font-weight:700;color:#55efc4;margin-left:4px;text-shadow:0 0 10px rgba(85,239,196,.8);animation:popIn .3s ease-out}@keyframes popIn{0%{transform:scale(0);opacity:0}to{transform:scale(1);opacity:1}}.lantern-bottom{display:flex;flex-direction:column;align-items:center}.lantern-bottom:before{content:"";width:30px;height:10px;background:linear-gradient(180deg,#f1c40f,#d4a600);border-radius:0 0 4px 4px}.tassel{width:4px;height:30px;background:linear-gradient(180deg,#f1c40f,#e74c3c);border-radius:0 0 2px 2px;position:relative;animation:swing 2s ease-in-out infinite}.tassel:after{content:"";position:absolute;bottom:0;left:50%;transform:translate(-50%);width:12px;height:20px;background:linear-gradient(180deg,#e74c3c,#c0392b);border-radius:0 0 6px 6px}@keyframes swing{0%,to{transform:rotate(-3deg)}50%{transform:rotate(3deg)}}.lantern.show-answer .lantern-body{border-color:#55efc4;box-shadow:inset 0 -20px 30px #0003,inset 0 20px 30px #ffffff1a,0 0 20px #55efc480}.lantern.multiplier{filter:drop-shadow(0 10px 20px rgba(241,196,15,.6))}.lantern.multiplier .lantern-body{background:linear-gradient(180deg,#f1c40f,#d4a600,#b8860b);border-color:#fff;box-shadow:inset 0 -20px 30px #0003,inset 0 20px 30px #ffffff4d,0 0 30px #f1c40fcc}.lantern.multiplier .lantern-glow{background:radial-gradient(ellipse at center,rgba(255,255,200,.5) 0%,transparent 70%)}.multiplier-text{font-size:2rem;font-weight:900;color:#fff;text-shadow:0 2px 8px rgba(0,0,0,.4);letter-spacing:2px}.multiplier-timer{position:absolute;top:50px;left:50%;transform:translate(-50%);display:flex;align-items:center;gap:10px;background:#00000080;padding:8px 16px;border-radius:20px;-webkit-backdrop-filter:blur(10px);backdrop-filter:blur(10px);animation:multiplierPulse .5s ease-in-out infinite;z-index:10}@keyframes multiplierPulse{0%,to{transform:translate(-50%) scale(1)}50%{transform:translate(-50%) scale(1.05)}}.multiplier-label{font-size:1.3rem;font-weight:900;color:#f1c40f;text-shadow:0 0 10px rgba(241,196,15,.8)}.multiplier-bar{width:80px;height:8px;background:#fff3;border-radius:4px;overflow:hidden}.multiplier-fill{height:100%;background:linear-gradient(90deg,#f1c40f,#f39c12);border-radius:4px;transition:width .3s linear}.multiplier-countdown{font-size:1.1rem;font-weight:600;color:#f1c40f;min-width:24px}.score-popup{position:fixed;font-size:2rem;font-weight:700;pointer-events:none;animation:floatUp 1s ease-out forwards;z-index:100;transform:translate(-50%,-50%);text-shadow:0 2px 8px rgba(0,0,0,.5)}.score-popup.correct{color:#55efc4}.score-popup.wrong{color:#ff7675}@keyframes floatUp{0%{opacity:1;transform:translate(-50%,-50%) scale(.5)}20%{transform:translate(-50%,-50%) scale(1.2)}to{opacity:0;transform:translate(-50%,-150%) scale(1)}}.explosion-container{position:fixed;pointer-events:none;z-index:99}.explosion-particle{position:absolute;width:var(--size);height:var(--size);border-radius:50%;animation:explode .6s ease-out forwards}.explosion-particle.correct{background:var(--correct-color)}.explosion-particle.wrong{background:var(--lantern-gold)}@keyframes explode{0%{transform:translate(-50%,-50%) scale(1);opacity:1}to{transform:translate(calc(-50% + var(--tx)),calc(-50% + var(--ty))) scale(0);opacity:0}}.result-screen{min-height:100vh;display:flex;align-items:center;justify-content:center;padding:20px;position:relative;z-index:1}.result-content{background:linear-gradient(135deg,#fffffff2,#fff0e6f2);border-radius:24px;padding:40px;text-align:center;box-shadow:0 20px 60px #0000004d;max-width:400px;width:100%;border:3px solid var(--lantern-gold)}.new-record-banner{background:linear-gradient(135deg,#fff3cd,#ffeeba);border-radius:12px;padding:12px 20px;margin-bottom:20px;font-size:1.3rem;font-weight:600;color:var(--primary-color);animation:bounce .5s ease-in-out;border:2px solid var(--lantern-gold)}@keyframes bounce{0%,to{transform:scale(1)}50%{transform:scale(1.1)}}.result-title{font-size:1.8rem;color:var(--text-dark);margin-bottom:20px}.final-score{margin-bottom:24px}.score-number{font-size:4rem;font-weight:700;color:var(--primary-color)}.score-unit{font-size:1.5rem;color:var(--text-light);margin-left:4px}.stats-grid{display:grid;grid-template-columns:1fr 1fr;gap:16px;margin-bottom:24px}.stat-item{background:#f5f7fa;border-radius:16px;padding:16px;display:flex;flex-direction:column;align-items:center}.stat-item.correct{border:2px solid var(--correct-color)}.stat-item.wrong{border:2px solid var(--wrong-color)}.stat-icon{font-size:1.5rem;margin-bottom:4px}.stat-item.correct .stat-icon{color:var(--correct-color)}.stat-item.wrong .stat-icon{color:var(--wrong-color)}.stat-value{font-size:2rem;font-weight:700;color:var(--text-dark)}.stat-label{font-size:.9rem;color:var(--text-light)}.high-score-info{background:linear-gradient(135deg,#fff3cd,#ffeeba);border-radius:12px;padding:12px 20px;margin-bottom:24px;font-size:1.1rem;color:var(--text-dark);border:2px solid var(--lantern-gold)}.restart-button{background:linear-gradient(135deg,var(--primary-color) 0%,#c0392b 100%);color:#fff;border:none;border-radius:50px;padding:16px 48px;font-size:1.3rem;font-weight:600;cursor:pointer;transition:transform .2s,box-shadow .2s;box-shadow:0 8px 24px #d6303166}.restart-button:hover{transform:translateY(-2px);box-shadow:0 12px 32px #d6303180}.restart-button:active{transform:translateY(0)}.mode-prompt{color:var(--text-light);font-size:1.1rem;margin-bottom:20px}.mode-cards{display:flex;flex-direction:column;gap:16px}.mode-card{background:linear-gradient(135deg,#fff5f5,#ffe8e8);border-radius:16px;padding:20px;cursor:pointer;transition:transform .2s,box-shadow .2s;border:2px solid rgba(231,76,60,.2)}.mode-card:hover{transform:translateY(-4px);box-shadow:0 8px 24px #00000026}.mode-card:active{transform:translateY(-2px)}.mode-icon{font-size:2.5rem;margin-bottom:8px}.mode-title{font-size:1.3rem;color:var(--primary-color);margin-bottom:12px}.mode-rules ul{list-style:none;text-align:left}.mode-rules li{display:flex;align-items:center;gap:8px;padding:4px 0;color:var(--text-light);font-size:.9rem}.mode-high-score{background:linear-gradient(135deg,#fff3cd,#ffeeba);border-radius:8px;padding:8px 12px;margin:12px 0;font-size:.95rem;color:var(--text-dark);border:1px solid var(--lantern-gold)}.mode-button{background:linear-gradient(135deg,var(--primary-color) 0%,#c0392b 100%);color:#fff;border:none;border-radius:20px;padding:10px 32px;font-size:1rem;font-weight:600;cursor:pointer;margin-top:8px}.pinyin-game-container{display:flex;flex-direction:column;min-height:100vh}.pinyin-game-area{flex:1;display:flex;flex-direction:column;align-items:center;padding:20px 20px 40px;overflow-y:auto}.pinyin-hint{color:#ffffffe6;font-size:1.1rem;margin-bottom:16px;text-shadow:0 2px 4px rgba(0,0,0,.3)}.pinyin-cards-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:12px;max-width:400px;width:100%;margin-bottom:20px}.pinyin-lantern{display:flex;flex-direction:column;align-items:center;cursor:pointer;-webkit-user-select:none;user-select:none;-webkit-tap-highlight-color:transparent;transition:transform .2s;filter:drop-shadow(0 8px 16px rgba(231,76,60,.3));animation:gentleSwing 3s ease-in-out infinite}.pinyin-lantern:nth-child(2){animation-delay:-.5s}.pinyin-lantern:nth-child(3){animation-delay:-1s}.pinyin-lantern:nth-child(4){animation-delay:-1.5s}@keyframes gentleSwing{0%,to{transform:rotate(-2deg)}50%{transform:rotate(2deg)}}.pinyin-lantern:hover{transform:scale(1.05);animation-play-state:paused}.pinyin-lantern:active{transform:scale(.98)}.pinyin-lantern .lantern-top{width:50px;height:12px;background:linear-gradient(180deg,#f1c40f,#d4a600);border-radius:4px 4px 0 0;position:relative}.pinyin-lantern .lantern-hook{position:absolute;top:-10px;left:50%;transform:translate(-50%);width:24px;height:12px;border:3px solid #d4a600;border-bottom:none;border-radius:12px 12px 0 0}.pinyin-lantern .lantern-body{width:150px;min-height:110px;background:linear-gradient(180deg,#e74c3c,#c0392b,#a93226);border-radius:50%/30%;display:flex;flex-direction:column;align-items:center;justify-content:center;position:relative;border:3px solid #f1c40f;box-shadow:inset 0 -15px 25px #0003,inset 0 15px 25px #ffffff1a;padding:14px 10px}.pinyin-lantern .lantern-glow{position:absolute;top:-8px;right:-8px;bottom:-8px;left:-8px;background:radial-gradient(ellipse at center,rgba(255,200,100,.4) 0%,transparent 70%);border-radius:50%;animation:lanternGlow 2s ease-in-out infinite;pointer-events:none}@keyframes lanternGlow{0%,to{opacity:.6;transform:scale(1)}50%{opacity:1;transform:scale(1.1)}}.pinyin-lantern .lantern-checkbox{position:absolute;top:8px;right:8px;width:22px;height:22px;border:2px solid rgba(255,255,255,.5);border-radius:50%;background:#fff3;display:flex;align-items:center;justify-content:center;transition:all .2s}.pinyin-lantern.selected .lantern-checkbox{background:#f1c40f;border-color:#f1c40f;box-shadow:0 0 8px #f1c40fcc}.pinyin-lantern .checkmark{color:#fff;font-size:.9rem;font-weight:700;text-shadow:0 1px 2px rgba(0,0,0,.3)}.pinyin-lantern .word-container{display:flex;justify-content:center;gap:8px}.pinyin-lantern .char-with-pinyin{display:flex;flex-direction:column;align-items:center}.pinyin-lantern .pinyin-text{font-size:1rem;color:#fff5e6;margin-bottom:4px;text-shadow:0 1px 2px rgba(0,0,0,.3);font-weight:500}.pinyin-lantern .character{font-size:1.8rem;font-weight:600;color:#fff5e6;text-shadow:0 2px 4px rgba(0,0,0,.3)}.pinyin-lantern .lantern-bottom{display:flex;flex-direction:column;align-items:center}.pinyin-lantern .lantern-bottom:before{content:"";width:30px;height:8px;background:linear-gradient(180deg,#f1c40f,#d4a600);border-radius:0 0 4px 4px}.pinyin-lantern .tassel{width:4px;height:20px;background:linear-gradient(180deg,#f1c40f,#e74c3c);border-radius:0 0 2px 2px;position:relative;animation:tasselSwing 2s ease-in-out infinite}.pinyin-lantern .tassel:after{content:"";position:absolute;bottom:0;left:50%;transform:translate(-50%);width:10px;height:14px;background:linear-gradient(180deg,#e74c3c,#c0392b);border-radius:0 0 5px 5px}@keyframes tasselSwing{0%,to{transform:rotate(-5deg)}50%{transform:rotate(5deg)}}.pinyin-lantern.selected{filter:drop-shadow(0 8px 20px rgba(241,196,15,.5))}.pinyin-lantern.selected .lantern-body{border-color:#fff;box-shadow:inset 0 -15px 25px #0003,inset 0 15px 25px #ffffff26,0 0 20px #f1c40f80}.pinyin-lantern.correct-answer{filter:drop-shadow(0 8px 20px rgba(0,184,148,.6))}.pinyin-lantern.correct-answer .lantern-body{background:linear-gradient(180deg,#00b894,#00a884,#009874);border-color:#55efc4}.pinyin-lantern.correct-answer .lantern-checkbox{background:#55efc4;border-color:#55efc4}.pinyin-lantern.wrong-selected{filter:drop-shadow(0 8px 20px rgba(255,118,117,.6))}.pinyin-lantern.wrong-selected .lantern-body{background:linear-gradient(180deg,#ff7675,#d63031,#c0392b);border-color:#fab1a0}.pinyin-lantern.wrong-selected .lantern-checkbox{background:#fab1a0;border-color:#fab1a0}.submit-button{background:linear-gradient(135deg,var(--primary-color) 0%,#c0392b 100%);color:#fff;border:none;border-radius:50px;padding:14px 48px;font-size:1.2rem;font-weight:600;cursor:pointer;transition:transform .2s,box-shadow .2s;box-shadow:0 8px 24px #d6303166}.submit-button:hover:not(.disabled){transform:translateY(-2px);box-shadow:0 12px 32px #d6303180}.submit-button:active:not(.disabled){transform:translateY(0)}.submit-button.disabled{opacity:.6;cursor:not-allowed}.skip-button{background:linear-gradient(135deg,var(--correct-color) 0%,#00a884 100%);color:#fff;border:none;border-radius:50px;padding:12px 36px;font-size:1.1rem;font-weight:600;cursor:pointer;transition:transform .2s,box-shadow .2s;box-shadow:0 6px 20px #00b89466;margin-top:12px}.skip-button:hover{transform:translateY(-2px);box-shadow:0 10px 28px #00b89480}.skip-button:active{transform:translateY(0)}.round-result{font-size:1.8rem;font-weight:700;padding:12px 24px;border-radius:16px;animation:resultPop .3s ease-out;margin-bottom:16px}.round-result.correct{background:linear-gradient(135deg,var(--correct-color) 0%,#00a884 100%);color:#fff;box-shadow:0 8px 32px #00b89480}.round-result.wrong{background:linear-gradient(135deg,var(--secondary-color) 0%,#e74c3c 100%);color:#fff;box-shadow:0 8px 32px #ff767580}@keyframes resultPop{0%{transform:scale(.5);opacity:0}to{transform:scale(1);opacity:1}}.result-buttons{display:flex;flex-direction:column;gap:12px}.menu-button{background:linear-gradient(135deg,#636e72,#2d3436);color:#fff;border:none;border-radius:50px;padding:14px 48px;font-size:1.1rem;font-weight:600;cursor:pointer;transition:transform .2s,box-shadow .2s;box-shadow:0 6px 20px #2d343666}.menu-button:hover{transform:translateY(-2px);box-shadow:0 10px 28px #2d343680}.menu-button:active{transform:translateY(0)}@media (max-width: 480px){.start-content,.result-content{padding:24px;margin:10px}.game-title{font-size:2rem}.lantern-body{width:100px;height:75px}.expression{font-size:1.1rem}.correct-answer{font-size:1rem}.score-value{font-size:1.5rem}.timer-bar{width:80px}.timer-text{font-size:1.2rem}.pinyin-cards-grid{gap:12px;padding:0 8px}.pinyin-lantern .lantern-body{width:120px;min-height:85px;padding:10px 6px}.pinyin-lantern .character{font-size:1.4rem}.pinyin-lantern .pinyin-text{font-size:.7rem}.pinyin-lantern .word-container{gap:6px}.pinyin-lantern .lantern-top{width:40px;height:10px}.pinyin-lantern .lantern-hook{width:20px;height:10px;top:-8px}.submit-button{padding:12px 36px;font-size:1.1rem}.round-result{font-size:1.5rem;padding:12px 24px}.mode-card{padding:16px}.mode-icon{font-size:2rem}.mode-title{font-size:1.1rem}}