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16px;color:var(--light-text);line-height:1.2}.faq-page-subtitle{font-size:1.125rem;color:var(--gray-text);line-height:1.6;max-width:600px;margin:0 auto}.faq-content{margin-bottom:80px}.faq-page .faq-list{gap:2px}.faq-page .faq-item{border:1px solid rgba(255,255,255,.1);margin-bottom:2px}.faq-page .faq-question-text{font-size:1.125rem;font-weight:600}.faq-footer{text-align:center;padding:40px 0;border-top:1px solid rgba(255,255,255,.1)}.faq-cta h3{font-size:1.5rem;font-weight:600;margin:0 0 16px;color:var(--light-text)}.faq-cta p{font-size:1rem;color:var(--gray-text);margin:0 0 24px;line-height:1.6}.faq-contact-btn{font-size:1rem;padding:12px 32px}@media (max-width: 768px){.wechat-modal{width:95%;margin:20px}.wechat-modal-content{padding:20px}.wechat-qr-container,.wechat-steps{padding:16px}.contact-options{gap:12px}.social-contact{gap:6px}.faq-modal{width:95%;max-width:none;max-height:90vh}.faq-question{padding:14px 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#6366f180}.test-info{padding:0;border-top:none}.info-header{padding:1.5rem;display:flex;align-items:center;justify-content:space-between;cursor:pointer;transition:background-color .2s ease}.info-header:hover{background-color:var(--card-darker)}.info-toggle{width:24px;height:24px;border-radius:50%;background-color:var(--primary-color);color:#fff;display:flex;align-items:center;justify-content:center;font-weight:700;font-size:1.2rem}.info-content{padding:0 1.5rem 1.5rem;color:var(--text-muted);font-size:.95rem;line-height:1.6}.info-content p{margin:0 0 .75rem}.test-content-area{display:flex;flex-direction:column;gap:2rem}.test-steps-container{display:grid;gap:1.5rem}.test-step{background-color:var(--card-bg);border-radius:16px;overflow:hidden;box-shadow:var(--shadow-md);border:1px solid var(--card-border)}.step-header{padding:1rem 1.5rem;display:flex;align-items:center;gap:1rem;background-color:var(--card-darker);border-bottom:1px solid var(--card-border)}.step-number{width:32px;height:32px;border-radius:50%;display:flex;align-items:center;justify-content:center;font-weight:700;font-size:1rem;color:#fff}.listen-step .step-number{background:linear-gradient(135deg,#4f46e5,#818cf8)}.record-step .step-number{background:linear-gradient(135deg,#be123c,#f43f5e)}.review-step .step-number{background:linear-gradient(135deg,#0891b2,#22d3ee)}.step-header h3{font-size:1.1rem;font-weight:600;margin:0}.audio-player,.record-player{padding:2rem;display:flex;flex-direction:column;align-items:center;gap:1.5rem}.audio-timer{font-size:2.5rem;font-weight:700;font-family:monospace;letter-spacing:2px;color:var(--text-light)}.audio-button,.record-button{width:200px;height:56px;border-radius:28px;border:none;cursor:pointer;transition:all .2s ease;font-weight:600;font-size:.95rem;overflow:hidden}.audio-button{background:linear-gradient(135deg,#4f46e5,#818cf8);color:#fff;box-shadow:0 4px 14px #4f46e566}.audio-button:hover:not(:disabled){transform:translateY(-2px);box-shadow:0 6px 20px #4f46e580}.audio-button:disabled{opacity:.5;cursor:not-allowed}.audio-button.playing{background:linear-gradient(135deg,#3730a3,#6366f1)}.button-content{display:flex;align-items:center;justify-content:center;gap:8px}.test-play-icon{width:0;height:0;border-style:solid;border-width:8px 0 8px 14px;border-color:transparent transparent transparent white}.pause-icon{width:14px;height:16px;position:relative;display:flex;align-items:center;justify-content:space-between}.pause-icon span{width:4px;height:14px;background-color:#fff;border-radius:2px}.audio-controls{display:flex;flex-direction:column;align-items:center;gap:1rem;width:100%}.auto-mode-toggle{display:flex;align-items:center;gap:8px;cursor:pointer}.toggle-slider{position:relative;width:44px;height:24px;border-radius:24px;background-color:var(--dark-bg);transition:all .2s ease}.toggle-slider:before{content:"";position:absolute;width:18px;height:18px;left:3px;top:3px;border-radius:50%;background-color:var(--text-muted);transition:all .2s ease}.auto-mode-toggle input{display:none}.auto-mode-toggle input:checked+.toggle-slider{background-color:var(--primary-dark)}.auto-mode-toggle input:checked+.toggle-slider:before{transform:translate(20px);background-color:#fff}.toggle-label{font-size:.9rem;color:var(--text-muted)}.audio-status,.record-status{font-size:.9rem;color:var(--text-muted);text-align:center}.record-visualizer{height:50px;display:flex;align-items:center;justify-content:center;gap:4px}.record-visualizer .bar{width:6px;height:10px;background-color:var(--text-muted);border-radius:3px;transition:height .2s ease}.record-visualizer.active .bar{animation:sound-wave 1s infinite}.record-visualizer.active .bar:nth-child(1){animation-delay:0s}.record-visualizer.active .bar:nth-child(2){animation-delay:.2s}.record-visualizer.active 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#f43f5eb3}70%{box-shadow:0 0 0 10px #f43f5e00}to{box-shadow:0 0 #f43f5e00}}.mic-icon{width:16px;height:16px;border-radius:50%;border:2px solid white;position:relative}.mic-icon.connecting{animation:spin-connect 1.2s linear infinite}@keyframes spin-connect{0%{transform:rotate(0);opacity:.7}50%{opacity:1}to{transform:rotate(360deg);opacity:.7}}.mic-icon:after{content:"";position:absolute;width:2px;height:6px;background-color:#fff;bottom:-4px;left:50%;transform:translate(-50%)}.stop-icon{width:12px;height:12px;background-color:#fff;border-radius:2px}.audio-controls-container.disabled-for-guests{position:relative;opacity:.6}.audio-controls-container.disabled-for-guests:before{content:"";position:absolute;top:0;left:0;right:0;bottom:0;background:#ef44441a;border:2px solid rgba(239,68,68,.3);border-radius:12px;z-index:1;pointer-events:none}.record-player.disabled-for-guests{position:relative;opacity:.6}.record-player.disabled-for-guests:before{content:"";position:absolute;top:0;left:0;right:0;bottom:0;background:#ef44441a;border:2px solid rgba(239,68,68,.3);border-radius:12px;z-index:1;pointer-events:none}.auto-mode-toggle-container.disabled-for-guests{position:relative;padding:8px;border-radius:8px;background:#ef44441a;border:1px solid rgba(239,68,68,.3)}.auto-mode-toggle-container.disabled-for-guests .auto-mode-toggle{opacity:.6;pointer-events:none}.auto-mode-toggle-container.disabled-for-guests .toggle-slider{background-color:#d1d5db!important}.auto-mode-toggle-container.disabled-for-guests .toggle-slider:before{background-color:#9ca3af!important}.guest-warning{display:flex;align-items:center;justify-content:center;gap:6px;margin-top:12px;padding:8px 12px;background:#ef44441a;border:1px solid rgba(239,68,68,.3);border-radius:6px;color:#dc2626;font-size:.85rem;font-weight:500}.guest-warning-small{display:flex;align-items:center;gap:4px;margin-top:4px;padding:4px 8px;background:#ef44441a;border:1px solid rgba(239,68,68,.3);border-radius:4px;color:#dc2626;font-size:.75rem;font-weight:500}.auto-mode-warning{display:flex;align-items:center;gap:4px;margin-top:4px;padding:4px 8px;background:#f59e0b1a;border:1px solid rgba(245,158,11,.3);border-radius:4px;color:#d97706;font-size:.75rem;font-weight:500}.manual-mode-tip{display:flex;align-items:center;gap:4px;margin-top:4px;padding:4px 8px;background:#3b82f61a;border:1px solid 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1.5rem;border-radius:10px;border:none;font-weight:600;font-size:1rem;cursor:pointer;transition:all .2s ease}.prev-button{background-color:var(--card-bg);color:var(--text-light);border:1px solid var(--card-border)}.prev-button:hover:not(:disabled){background-color:var(--card-darker)}.prev-button:disabled{opacity:.5;cursor:not-allowed}.next-button{background:linear-gradient(135deg,var(--primary-color),var(--primary-dark));color:#fff;box-shadow:0 4px 14px #4f46e566}.next-button:hover{transform:translateY(-2px);box-shadow:0 6px 20px #4f46e580}@media (max-width: 1024px){.test-container{grid-template-columns:1fr}.test-sidebar{order:2}.test-content-area{order:1}}@media (max-width: 768px){.test-container{grid-template-columns:1fr;display:flex;flex-direction:column}.test-sidebar{order:0;margin-bottom:1.5rem;display:flex;flex-direction:column}.test-progress,.test-info{width:100%}.test-header-bar{flex-direction:column;gap:1rem;text-align:center}.audio-button,.record-button{width:100%;max-width:300px}}@media (max-width: 480px){.test-header-bar h1{font-size:1.5rem}.navigation-controls{flex-direction:column;gap:1rem}.nav-button{width:100%}.step-header h3{font-size:1rem}}.auth-container{display:flex;justify-content:center;align-items:center;min-height:80vh;padding:2rem;background:radial-gradient(ellipse at top,#1a2033,var(--darker-bg))}.auth-card{background-color:var(--dark-bg);border-radius:16px;box-shadow:0 10px 30px #00000040;width:100%;max-width:450px;padding:2.5rem 2rem;border:1px solid rgba(255,255,255,.1);transition:transform .3s ease,box-shadow .3s ease}.auth-card:hover{transform:translateY(-5px);box-shadow:0 15px 35px #0000004d}.auth-header{text-align:center;margin-bottom:1.5rem}.logo-container{display:flex;align-items:center;justify-content:center;margin-bottom:1rem}.auth-header .logo-icon{width:3rem;height:3rem;border-radius:1rem;background:linear-gradient(135deg,#7a63c3,#c166bb);display:flex;align-items:center;justify-content:center;margin-right:.5rem;font-style:italic;color:#fff;font-weight:600;box-shadow:0 4px 10px #0000004d;position:relative;overflow:hidden;font-size:2rem}.auth-header .logo-icon:after{content:"";position:absolute;top:0;right:0;width:40%;height:40%;background:radial-gradient(circle at top right,#fffc,#fff0 70%);pointer-events:none}.auth-header .logo-text{color:#fff;font-weight:600;letter-spacing:.05rem;font-size:2rem}.auth-header h2{font-size:1.75rem;margin-bottom:.5rem;color:#fff;font-weight:700}.auth-tabs{display:flex;margin-bottom:2rem;border-radius:10px;background-color:#0003;padding:.25rem;overflow:hidden;position:relative}.tab-btn{flex:1;background:none;border:none;padding:.75rem 0;color:var(--gray-text);font-size:1rem;font-weight:500;cursor:pointer;position:relative;z-index:1;transition:color .3s ease;border-radius:8px}.tab-btn.active{color:#fff}.tab-indicator{position:absolute;width:50%;height:calc(100% - .5rem);top:.25rem;background:linear-gradient(135deg,var(--primary-color),#3a80d2);border-radius:8px;transition:transform .3s ease;z-index:0}.tab-indicator.left{transform:translate(.25rem)}.tab-indicator.right{transform:translate(calc(100% - .5rem))}.auth-form{margin-bottom:1.5rem}.auth-form .input-container{position:relative;display:block}.auth-form .input-icon{position:absolute!important;left:15px!important;top:50%!important;transform:translateY(-50%)!important;color:#fffc!important;pointer-events:none!important;z-index:10!important;width:20px!important;height:20px!important;display:block!important}.auth-form .form-group input{padding-left:45px!important}.form-group{margin-bottom:0}.form-group label{display:block;margin-bottom:.5rem;font-weight:500;color:#fff;text-align:left;font-size:.95rem}.input-container{position:relative;display:flex;align-items:center}.input-icon{position:absolute;left:1rem;top:50%;transform:translateY(-50%);color:var(--gray-text);pointer-events:none;z-index:1;display:flex;align-items:center;justify-content:center}.form-group input{width:100%;padding:.875rem 1rem .875rem 2.75rem;background-color:#0003;border:1px solid rgba(255,255,255,.1);border-radius:8px;font-size:1rem;color:#fff;transition:all .3s ease}.form-group input::placeholder{color:#fff6}.form-group input:focus{outline:none;border-color:var(--primary-color);box-shadow:0 0 0 2px #4a90e233;background-color:#0000004d}.form-group input.error{border-color:#e74c3c;background-color:#e74c3c0d}.error-text{color:#e74c3c;font-size:.875rem;margin-top:.5rem;text-align:left;display:flex;align-items:center;gap:.4rem}.error-message{background-color:#e74c3c1a;color:#e74c3c;padding:.75rem;border-radius:8px;margin-bottom:1.5rem;text-align:center;display:flex;align-items:center;justify-content:center;gap:.5rem;border:1px solid rgba(231,76,60,.2)}.submit-btn{width:100%;padding:1rem;background:linear-gradient(135deg,var(--primary-color),#3a80d2);color:#fff;border:none;border-radius:8px;font-size:1rem;font-weight:600;cursor:pointer;transition:all .3s ease;position:relative;overflow:hidden}.submit-btn:before{content:"";position:absolute;top:0;left:-100%;width:100%;height:100%;background:linear-gradient(90deg,transparent,rgba(255,255,255,.2),transparent);transition:.5s}.submit-btn:hover:before{left:100%}.submit-btn:hover:not(:disabled){background:linear-gradient(135deg,#3a80d2,var(--primary-color));transform:translateY(-2px);box-shadow:0 4px 15px #4a90e266}.submit-btn:disabled{opacity:.7;cursor:not-allowed}.loading-indicator{display:flex;justify-content:center;align-items:center;gap:.3rem}.loading-dot{width:8px;height:8px;background-color:#fff;border-radius:50%;animation:bounce 1.4s infinite ease-in-out both}.loading-dot:nth-child(1){animation-delay:-.32s}.loading-dot:nth-child(2){animation-delay:-.16s}@keyframes bounce{0%,80%,to{transform:scale(0)}40%{transform:scale(1)}}.auth-options{margin-top:1rem;text-align:center}.auth-link{color:var(--primary-color);font-size:.9rem;text-decoration:none;transition:all .2s 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#0003}.feature-btn.active{background:linear-gradient(135deg,#3b82f6,#1d4ed8);border-color:#3b82f6;color:#fff;box-shadow:0 4px 12px #3b82f64d}.btn-icon{font-size:1rem;opacity:.9}.btn-text{font-weight:500;white-space:nowrap}.header-actions{display:flex;align-items:center;gap:1rem}.login-button{display:flex;align-items:center;gap:.5rem;background:linear-gradient(135deg,var(--primary-color),#3a80d2);color:#fff;border:none;border-radius:8px;padding:.5rem 1rem;font-weight:500;cursor:pointer;transition:all .3s ease;box-shadow:0 2px 8px #4a90e24d;position:relative;overflow:hidden}.login-button:before{content:"";position:absolute;top:0;left:-100%;width:100%;height:100%;background:linear-gradient(90deg,transparent,rgba(255,255,255,.2),transparent);transition:.5s}.login-button:hover:before{left:100%}.login-button:hover{background:linear-gradient(135deg,#3a80d2,var(--primary-color));transform:translateY(-2px);box-shadow:0 4px 12px #4a90e266}.login-icon{stroke:#fff}.settings-button{display:flex;align-items:center;justify-content:center;background:none;border:none;cursor:pointer;width:36px;height:36px;border-radius:50%;transition:all .3s ease}.settings-button:hover{background-color:#ffffff1a}.settings-icon{width:1.5rem;height:1.5rem;color:var(--light-text);transition:transform .3s ease}.settings-button:hover .settings-icon{transform:rotate(30deg)}@media (max-width: 768px){.login-button span{display:none}.login-button{padding:.65rem .75rem;border-radius:8px;min-width:48px;font-weight:600}.language-btn{font-weight:500}}.user-actions,.user-welcome,.logout-button,.logout-icon{display:none}.success-message{display:flex;align-items:center;gap:10px;background-color:#48bb781a;color:#edf0ee;border-radius:6px;padding:12px 16px;margin-bottom:20px;font-size:.9rem}.success-message 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.3s ease}.user-profile:hover .dropdown-arrow{transform:translateY(2px)}.profile-dropdown{position:absolute;top:calc(100% + 8px);right:0;background:#1e293bf2;border-radius:12px;width:260px;box-shadow:0 10px 25px #0000004d;-webkit-backdrop-filter:blur(20px);backdrop-filter:blur(20px);border:1px solid rgba(255,255,255,.08);overflow:hidden;z-index:100;animation:dropdown-fade .2s ease}@keyframes dropdown-fade{0%{opacity:0;transform:translateY(-10px)}to{opacity:1;transform:translateY(0)}}.dropdown-header{padding:16px;display:flex;align-items:center;border-bottom:1px solid rgba(255,255,255,.08)}.dropdown-user-avatar{width:40px;height:40px;border-radius:10px;background:linear-gradient(135deg,#6366f1,#8b5cf6);display:flex;align-items:center;justify-content:center;margin-right:12px;color:#fff;font-weight:600;font-size:18px;box-shadow:0 2px 6px 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translateY(-8px)}.card-inner{position:relative;width:100%;height:100%;transform-style:preserve-3d;border-radius:16px}.card-front,.card-back{position:absolute;width:100%;height:100%;backface-visibility:hidden;display:flex;flex-direction:column;justify-content:center;align-items:center;text-align:center;padding:20px;border-radius:16px;background:linear-gradient(135deg,#1a1a2e,#16213e);box-shadow:0 8px 32px #0006;border:1px solid rgba(255,255,255,.1);box-sizing:border-box}.card-back{transform:rotateY(180deg);background:linear-gradient(135deg,#0f0f23,#1a1a40);border-color:#ffffff26}.card-level{position:absolute;top:12px;left:12px;color:#fff;font-size:10px;font-weight:600;padding:4px 8px;border-radius:8px;text-transform:uppercase;letter-spacing:.5px}.card-category{position:absolute;top:12px;right:12px;font-size:11px;font-weight:600;opacity:.8;text-transform:uppercase;letter-spacing:.5px}.chinese-character{font-size:3rem;font-weight:300;color:#fff;margin:10px 0 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rgba(255,255,255,.1);border-radius:16px;-webkit-backdrop-filter:blur(15px);backdrop-filter:blur(15px);box-shadow:0 8px 32px #0000004d}.no-cards-icon{font-size:4rem;margin-bottom:20px;opacity:.5}.no-cards h3{font-size:1.5rem;color:#e0e0e0;margin:0 0 8px;font-weight:600}.no-cards p{color:#b0b0b0;font-size:1rem;margin:0}@media (max-width: 768px){.vocab-page{padding:15px 0}.vocab-container{padding:0 16px}.vocab-header{margin-bottom:25px}.back-button{position:static;margin-bottom:20px}.vocab-title{font-size:2rem;margin-bottom:6px}.vocab-subtitle{font-size:1rem}.filters-container{padding:16px;margin-bottom:16px}.filter-section{margin-bottom:16px}.filter-section h4{font-size:.9rem;margin-bottom:8px}.filter-btn{padding:5px 12px;font-size:12px}.vocab-stats{gap:12px;margin-bottom:20px}.stat{padding:12px 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tipPulse{0%,to{transform:scale(1)}50%{transform:scale(1.1)}}.study-tip-content{flex:1}.study-tip-label{display:block;font-size:12px;font-weight:600;color:#4f9cf9;text-transform:uppercase;letter-spacing:.5px;margin-bottom:4px}.study-tip-text{font-size:14px;font-weight:400;color:#ffffffe6;line-height:1.4;margin:0}.lessons-title{font-size:20px;margin-top:10px;margin-bottom:10px;color:#fff;opacity:.9}.lessons-cards-grid{display:grid;grid-template-columns:1fr 1fr;gap:16px;margin-bottom:40px}.lesson-card{background:#ffffff1f;border-radius:16px;padding:20px 16px;cursor:pointer;transition:all .3s ease;-webkit-backdrop-filter:blur(10px);backdrop-filter:blur(10px);border:1px solid rgba(255,255,255,.1);min-height:140px;display:flex;flex-direction:column;justify-content:space-between;position:relative;overflow:hidden}.lesson-card:focus{outline:none}.mobile-main-page .lesson-card.card-pressed,.lesson-card.hsk-card.card-pressed{transform:translateY(-4px)!important;background:#ffffff2e!important;box-shadow:0 8px 32px #0000004d!important;width:auto!important;height:auto!important;min-height:140px!important}.mobile-main-page .lesson-card.card-normal,.lesson-card.hsk-card.card-normal{transform:translateY(0)!important;background:#ffffff1f!important;box-shadow:none!important;animation:none!important;scale:1!important;filter:none!important;width:auto!important;height:auto!important;min-height:140px!important}.card-icon{display:flex;align-items:center;justify-content:flex-start;margin-bottom:12px}.icon-emoji{font-size:28px;filter:drop-shadow(0 2px 4px rgba(0,0,0,.3))}.card-content{flex:1}.card-title{font-size:16px;font-weight:700;margin:0 0 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