.header{text-align:center;padding:2rem 1rem 1.5rem;background:#fff;box-shadow:0 2px 8px rgba(0,0,0,.05)}.header-content{max-width:600px;margin:0 auto}.title{font-size:2rem;font-weight:700;margin-bottom:.3rem;background:linear-gradient(135deg,#667eea,#764ba2);-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text;animation:fadeInDown .8s ease-out}.subtitle{font-size:.9rem;color:#666;animation:fadeInUp .8s ease-out}@keyframes fadeInDown{0%{opacity:0;transform:translateY(-20px)}to{opacity:1;transform:translateY(0)}}@keyframes fadeInUp{0%{opacity:0;transform:translateY(20px)}to{opacity:1;transform:translateY(0)}}@media (max-width:768px){.title{font-size:2rem}.subtitle{font-size:.9rem}}.riddle-card{background:#fff;border-radius:20px;padding:2rem;box-shadow:0 10px 40px rgba(0,0,0,.1);animation:slideIn .5s ease-out}@keyframes slideIn{0%{opacity:0;transform:translateY(20px)}to{opacity:1;transform:translateY(0)}}.question-section{text-align:center;margin-bottom:2rem;padding-bottom:2rem;border-bottom:2px dashed #e0e0e0}.question-icon{font-size:3rem;margin-bottom:1rem;animation:bounce 2s infinite}@keyframes bounce{0%,to{transform:translateY(0)}50%{transform:translateY(-10px)}}.question-text{font-size:1.5rem;color:#333;line-height:1.6;font-weight:600}.answer-section{display:flex;flex-direction:column;align-items:center;min-height:160px;justify-content:center}.answer-placeholder{padding:2rem;text-align:center;width:100%}.placeholder-text{font-size:1.1rem;color:#999;font-weight:500}.answer-content{padding:2rem;background:linear-gradient(135deg,#fff4e6,#ffe9cc);border-radius:20px;width:100%;text-align:center;display:flex;flex-direction:column;align-items:center;gap:1rem;box-shadow:0 4px 15px rgba(0,0,0,.08)}.answer-icon{font-size:2.5rem;animation:glow 1.5s ease-in-out infinite}@keyframes glow{0%,to{opacity:1}50%{opacity:.7}}.answer-text{font-size:1.3rem;color:#333;line-height:1.6;font-weight:600}.answer-reveal-enter-active,.answer-reveal-leave-active{transition:all .3s ease}.answer-reveal-enter-from,.answer-reveal-leave-to{opacity:0;transform:scale(.95)}@media (max-width:768px){.riddle-card{padding:1.5rem}.question-text{font-size:1.2rem}.answer-section{min-height:140px}.answer-content{padding:1.5rem}.answer-text{font-size:1.1rem}}.navigation{justify-content:center;gap:1rem}.nav-btn,.navigation{display:flex;align-items:center}.nav-btn{background:#fff;border:2px solid transparent;padding:.9rem 1.8rem;border-radius:12px;font-size:1rem;font-weight:600;cursor:pointer;gap:.5rem;transition:all .3s ease;box-shadow:0 2px 8px rgba(0,0,0,.1);color:#333}.nav-btn:hover:not(:disabled){transform:translateY(-2px);box-shadow:0 4px 12px rgba(0,0,0,.15)}.nav-btn:active:not(:disabled){transform:translateY(0)}.nav-btn:disabled{opacity:.3;cursor:not-allowed;transform:none}.prev-btn{background:#f8f9fa;border-color:#e9ecef}.prev-btn:hover:not(:disabled){background:#e9ecef;border-color:#dee2e6}.next-btn{background:#f8f9fa;border-color:#e9ecef}.next-btn:hover:not(:disabled){background:#e9ecef;border-color:#dee2e6}.answer-btn{background:linear-gradient(135deg,#4facfe,#00f2fe);color:#fff;border:none;padding:1rem 2rem;font-size:1.05rem}.answer-btn:hover:not(:disabled){background:linear-gradient(135deg,#3a9bef,#00d9e5);box-shadow:0 4px 15px rgba(79,172,254,.4)}.answer-btn:disabled{opacity:.5;background:linear-gradient(135deg,#a0d9f5,#7fe3f0)}.nav-icon{font-size:1.2rem}.nav-text{font-family:PingFang SC,Microsoft YaHei,Arial,sans-serif}@media (max-width:768px){.navigation{gap:.75rem;flex-wrap:wrap}.nav-btn{padding:.8rem 1.4rem;font-size:.95rem}.answer-btn{order:-1;flex:1 0 100%;justify-content:center}}.promo-button{position:fixed;top:50%;right:0;transform:translateY(-50%);background:linear-gradient(135deg,#667eea,#764ba2);color:#fff;border:none;padding:1rem .8rem;border-radius:12px 0 0 12px;cursor:pointer;display:flex;flex-direction:column;align-items:center;gap:.5rem;box-shadow:-4px 4px 12px rgba(102,126,234,.4);transition:all .3s ease;z-index:999;writing-mode:vertical-rl;text-orientation:upright}.promo-button:hover{padding-right:1.2rem;box-shadow:-6px 6px 20px rgba(102,126,234,.6)}.promo-button:active{transform:translateY(-50%) scale(.95)}.curtain-icon{width:28px;height:28px;animation:curtainWave 2s ease-in-out infinite}@keyframes curtainWave{0%,to{transform:scaleY(1)}50%{transform:scaleY(.95)}}.promo-text{font-size:.9rem;font-weight:600;letter-spacing:.1em;writing-mode:vertical-rl;text-orientation:upright}@media (max-width:768px){.promo-button{padding:.8rem .6rem;top:40%}.curtain-icon{width:24px;height:24px}.promo-text{font-size:.8rem}}.modal-overlay{position:fixed;top:0;left:0;right:0;bottom:0;background:rgba(0,0,0,.6);backdrop-filter:blur(4px);display:flex;align-items:center;justify-content:center;z-index:1000;padding:1rem}.modal-content{background:#fff;border-radius:24px;padding:2.5rem;max-width:480px;width:100%;position:relative;box-shadow:0 20px 60px rgba(0,0,0,.25);animation:modalSlideIn .4s cubic-bezier(.34,1.56,.64,1)}@keyframes modalSlideIn{0%{opacity:0;transform:scale(.85) translateY(-30px)}to{opacity:1;transform:scale(1) translateY(0)}}.close-btn{position:absolute;top:1.25rem;right:1.25rem;background:#f5f7fa;border:none;font-size:1.3rem;color:#666;cursor:pointer;width:36px;height:36px;display:flex;align-items:center;justify-content:center;border-radius:50%;transition:all .3s ease}.close-btn:hover{background:#e9ecef;color:#333;transform:rotate(90deg)}.modal-header{text-align:center;margin-bottom:2rem}.modal-title{font-size:1.6rem;color:#333;margin-bottom:.5rem;font-weight:700}.modal-description{font-size:1rem;color:#666}.qr-code-section{display:flex;align-items:center;justify-content:space-between;gap:2rem;margin-bottom:2rem;padding:2rem;background:linear-gradient(135deg,#f0f4ff,#e6f0ff);border-radius:18px;border:2px dashed #4facfe}.qr-code-placeholder{width:130px;height:130px;background:#fff;border-radius:16px;display:flex;flex-direction:column;align-items:center;justify-content:center;box-shadow:0 6px 20px rgba(0,0,0,.08);position:relative;overflow:hidden;flex-shrink:0}.qr-code-placeholder:before{content:"";position:absolute;top:0;left:0;right:0;bottom:0;background:repeating-linear-gradient(90deg,#f8f9fa,#f8f9fa 12px,#fff 0,#fff 24px),repeating-linear-gradient(0deg,#f8f9fa,#f8f9fa 12px,#fff 0,#fff 24px);opacity:.7}.qr-icon{font-size:3rem;margin-bottom:.3rem}.qr-icon,.qr-text{position:relative;z-index:1}.qr-text{font-size:.75rem;color:#999;font-weight:600}.scan-instruction{text-align:left;flex:1}.instruction-text{font-size:1.2rem;color:#333;font-weight:700;margin-bottom:.5rem}.instruction-subtext{font-size:.95rem;color:#666}.features{display:grid;grid-template-columns:repeat(3,1fr);gap:1rem}.feature-item{display:flex;flex-direction:column;align-items:center;gap:.6rem;padding:1.2rem .5rem;background:linear-gradient(135deg,#fff9f0,#fff4e6);border-radius:14px;transition:all .3s ease;border:2px solid transparent}.feature-item:hover{transform:translateY(-4px);border-color:#ffc078;box-shadow:0 6px 16px rgba(255,192,120,.2)}.feature-icon{font-size:2rem}.feature-text{font-size:.9rem;color:#333;font-weight:600;text-align:center}.modal-fade-enter-active,.modal-fade-leave-active{transition:opacity .3s ease}.modal-fade-enter-from,.modal-fade-leave-to{opacity:0}.modal-fade-enter-active .modal-content{animation:modalSlideIn .4s cubic-bezier(.34,1.56,.64,1)}.modal-fade-leave-active .modal-content{animation:modalSlideOut .3s ease-in}@keyframes modalSlideOut{0%{opacity:1;transform:scale(1) translateY(0)}to{opacity:0;transform:scale(.85) translateY(-30px)}}@media (max-width:768px){.modal-content{padding:2rem 1.5rem;margin:1rem}.modal-title{font-size:1.4rem}.qr-code-section{flex-direction:column;gap:1.5rem;padding:1.5rem}.qr-code-placeholder{width:110px;height:110px}.qr-icon{font-size:2.5rem}.scan-instruction{text-align:center}.features{grid-template-columns:1fr;gap:.75rem}.feature-item{flex-direction:row;justify-content:center;padding:1rem}}.riddle-game{min-height:100vh;display:flex;flex-direction:column}.game-container{flex:1;display:flex;flex-direction:column;justify-content:center;max-width:800px;width:100%;margin:0 auto;padding:0 1rem;gap:2rem}@media (max-width:768px){.game-container{padding:0 1rem;gap:1.5rem}}*{margin:0;padding:0;box-sizing:border-box}#app{min-height:100vh;background:#f5f7fa;font-family:PingFang SC,Microsoft YaHei,Arial,sans-serif}