:root{--aurora-1:#ff6b6b;--aurora-2:#4ecdc4;--aurora-3:#45b7d1;--aurora-4:#96ceb4;--aurora-5:#ffeaa7;--aurora-6:#dfe6e9;--aurora-7:#a29bfe;--aurora-8:#fd79a8;--gradient-primary:linear-gradient(135deg,#6366f1 0%,#8b5cf6 50%,#a855f7 100%);--gradient-aurora:linear-gradient(135deg,#ff6b6b,#4ecdc4,#45b7d1,#96ceb4);--gradient-accent:linear-gradient(135deg,#f59e0b 0%,#ef4444 100%);--bg-primary:#0c0c1d;--bg-secondary:#131328;--bg-card:rgba(255,255,255,0.08);--bg-card-hover:rgba(255,255,255,0.12);--text-primary:#ffffff;--text-secondary:rgba(255,255,255,0.85);--text-muted:rgba(255,255,255,0.6);--text-hint:rgba(255,255,255,0.4);--glass-bg:rgba(255,255,255,0.06);--glass-border:rgba(255,255,255,0.12);--glass-shadow:0 8px 32px rgba(0,0,0,0.3);--spacing-xs:0.25rem;--spacing-sm:0.5rem;--spacing-md:1rem;--spacing-lg:1.5rem;--spacing-xl:2rem;--spacing-2xl:3rem;--spacing-3xl:4rem;--radius-sm:6px;--radius-md:10px;--radius-lg:14px;--radius-xl:20px;--radius-full:9999px;--transition-fast:0.15s ease;--transition-normal:0.3s ease;--transition-slow:0.5s ease}*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}html{scroll-behavior:smooth;font-size:15px}body{font-family:'Inter',-apple-system,BlinkMacSystemFont,'Segoe UI',sans-serif;background:var(--bg-primary);color:var(--text-primary);min-height:100vh;overflow-x:hidden;line-height:1.6}.aurora-container{position:fixed;top:0;left:0;width:100%;height:100%;pointer-events:none;z-index:0;overflow:hidden}.aurora{position:absolute;width:120%;height:120%;border-radius:50%;opacity:0.25}.aurora-1{top:-40%;left:-20%;background:radial-gradient(circle,rgba(99,102,241,0.4) 0%,transparent 70%);animation-delay:0s}.aurora-2{top:-20%;right:-20%;background:radial-gradient(circle,rgba(139,92,246,0.3) 0%,transparent 70%);animation-delay:-6s}.aurora-3{bottom:-20%;left:-20%;background:radial-gradient(circle,rgba(168,85,247,0.25) 0%,transparent 70%);animation-delay:-12s}.aurora-4{bottom:-40%;right:-20%;background:radial-gradient(circle,rgba(236,72,153,0.2) 0%,transparent 70%);animation-delay:-18s}.nav-glass{position:fixed;top:var(--spacing-md);left:50%;transform:translateX(-50%) translateZ(0);z-index:100;background:rgba(20,20,40,0.8);backdrop-filter:blur(10px);-webkit-backdrop-filter:blur(10px);border:1px solid var(--glass-border);border-radius:var(--radius-xl);padding:var(--spacing-sm) var(--spacing-lg);box-shadow:var(--glass-shadow);will-change:transform}.nav-content{display:flex;align-items:center;justify-content:space-between;gap:var(--spacing-2xl)}.nav-logo{display:flex;align-items:center;gap:var(--spacing-sm)}.logo-icon{width:36px;height:36px;background:var(--gradient-primary);border-radius:var(--radius-sm);display:flex;align-items:center;justify-content:center;color:white;transition:transform var(--transition-normal)}.logo-icon:hover{transform:rotate(15deg) scale(1.1)}.logo-icon svg{width:20px;height:20px}.logo-icon.small{width:28px;height:28px}.logo-icon.small svg{width:16px;height:16px}.logo-text{font-size:1rem;font-weight:700;background:linear-gradient(135deg,#fff 0%,#c4b5fd 100%);-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text}.nav-links{display:flex;gap:var(--spacing-lg)}.nav-link{color:var(--text-muted);text-decoration:none;font-size:0.8rem;font-weight:500;transition:color var(--transition-fast)}.nav-link:hover{color:var(--text-primary)}.main-container{position:relative;z-index:2;min-height:100vh;padding-top:80px}.page{display:none;min-height:calc(100vh - 160px);padding:var(--spacing-lg);animation:fadeIn 0.4s ease}.page.active{display:block}@keyframes fadeIn{from{opacity:0;transform:translateY(10px)}to{opacity:1;transform:translateY(0)}}.hero{min-height:calc(100vh - 200px);display:flex;align-items:center;justify-content:center}.hero-content{max-width:720px;width:100%;text-align:center}.hero-badge{display:inline-flex;align-items:center;gap:var(--spacing-sm);background:rgba(99,102,241,0.15);border:1px solid rgba(99,102,241,0.3);border-radius:var(--radius-full);padding:var(--spacing-xs) var(--spacing-md);margin-bottom:var(--spacing-lg);animation:fadeInUp 0.6s ease}.badge-dot{width:6px;height:6px;background:#4ade80;border-radius:50%}.hero-badge span:last-child{color:var(--text-secondary);font-size:0.75rem;font-weight:500}.hero-title{font-size:clamp(2rem,5vw,3rem);font-weight:800;color:var(--text-primary);line-height:1.2;margin-bottom:var(--spacing-md)}.gradient-text{background:linear-gradient(135deg,#818cf8 0%,#c084fc 50%,#f472b6 100%);background-size:200% auto;-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text}.hero-subtitle{font-size:0.95rem;color:var(--text-muted);margin-bottom:var(--spacing-2xl);line-height:1.7}.input-card{background:var(--bg-card);backdrop-filter:blur(10px);-webkit-backdrop-filter:blur(10px);border:1px solid var(--glass-border);border-radius:var(--radius-xl);padding:var(--spacing-lg)}.input-header{display:flex;justify-content:space-between;align-items:center;margin-bottom:var(--spacing-sm)}.input-label{color:var(--text-primary);font-weight:600;font-size:0.8rem}.input-wrapper{position:relative;margin-bottom:var(--spacing-md)}.topic-input{width:100%;background:rgba(0,0,0,0.4);border:1px solid var(--glass-border);border-radius:var(--radius-md);padding:var(--spacing-md);color:var(--text-primary);font-size:0.9rem;outline:none;transition:all var(--transition-normal)}.topic-input::placeholder{color:var(--text-hint)}.topic-input:focus{border-color:rgba(99,102,241,0.6);box-shadow:0 0 0 3px rgba(99,102,241,0.15)}.input-glow{position:absolute;top:50%;left:50%;transform:translate(-50%,-50%);width:100%;height:100%;background:var(--gradient-primary);border-radius:var(--radius-md);filter:blur(50px);opacity:0;transition:opacity var(--transition-normal);pointer-events:none}.topic-input:focus+.input-glow{opacity:0.15}.options-grid{display:grid;grid-template-columns:2fr 1fr;gap:var(--spacing-md);margin-bottom:var(--spacing-lg)}.option-group{display:flex;flex-direction:column;gap:var(--spacing-xs)}.option-label{color:var(--text-muted);font-size:0.75rem;font-weight:500;margin-bottom:var(--spacing-xs)}.length-options{display:flex;gap:var(--spacing-sm)}.length-btn{flex:1;display:flex;flex-direction:column;align-items:center;gap:2px;background:rgba(255,255,255,0.03);border:1px solid var(--glass-border);border-radius:var(--radius-md);padding:var(--spacing-sm) var(--spacing-md);cursor:pointer;transition:all var(--transition-normal)}.length-btn:hover{background:rgba(255,255,255,0.06);border-color:rgba(255,255,255,0.2)}.length-btn.active{background:rgba(99,102,241,0.15);border-color:rgba(99,102,241,0.5)}.length-icon{font-size:1.2rem}.length-text{color:var(--text-primary);font-size:0.8rem;font-weight:600}.length-desc{color:var(--text-hint);font-size:0.65rem}.audience-select{width:100%;background:rgba(0,0,0,0.4);border:1px solid var(--glass-border);border-radius:var(--radius-md);padding:var(--spacing-sm) var(--spacing-md);color:var(--text-primary);font-size:0.8rem;outline:none;cursor:pointer;transition:all var(--transition-normal)}.audience-select:focus{border-color:rgba(99,102,241,0.6)}.audience-select option{background:#1a1a2e;color:var(--text-primary)}.start-btn{position:relative;width:100%;background:var(--gradient-primary);border:none;border-radius:var(--radius-md);padding:var(--spacing-md);cursor:pointer;overflow:hidden;transition:all var(--transition-normal)}.start-btn:hover{transform:translateY(-2px);box-shadow:0 8px 30px rgba(99,102,241,0.35)}.btn-content{display:flex;align-items:center;justify-content:center;gap:var(--spacing-sm);color:#fff;font-size:0.95rem;font-weight:600;position:relative;z-index:1}.btn-icon{width:18px;height:18px}.btn-shine{position:absolute;top:0;left:-100%;width:100%;height:100%;background:linear-gradient(90deg,transparent,rgba(255,255,255,0.25),transparent);transition:left 0.5s ease}.start-btn:hover .btn-shine{left:100%}.features-section{padding:var(--spacing-3xl) var(--spacing-lg)}.features-container{max-width:1100px;margin:0 auto}.section-title{font-size:clamp(1.4rem,3vw,1.8rem);font-weight:700;color:var(--text-primary);margin-bottom:var(--spacing-xl)}.section-title.centered{text-align:center}.features-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(280px,1fr));gap:var(--spacing-lg);margin-top:var(--spacing-xl)}.feature-card{background:var(--bg-card);backdrop-filter:blur(10px);-webkit-backdrop-filter:blur(10px);border:1px solid var(--glass-border);border-radius:var(--radius-lg);padding:var(--spacing-lg);transition:all var(--transition-normal)}.feature-card:hover{transform:translateY(-5px);border-color:rgba(99,102,241,0.3);box-shadow:0 15px 35px rgba(0,0,0,0.2)}.feature-card.highlight{background:linear-gradient(135deg,rgba(99,102,241,0.08),rgba(139,92,246,0.08));border-color:rgba(99,102,241,0.25)}.feature-icon{font-size:2rem;margin-bottom:var(--spacing-md)}.feature-title{color:var(--text-primary);font-size:1rem;font-weight:600;margin-bottom:var(--spacing-xs)}.feature-desc{color:var(--text-muted);font-size:0.85rem;line-height:1.6}.page-header{display:flex;align-items:center;justify-content:space-between;gap:var(--spacing-lg);padding:var(--spacing-md) var(--spacing-lg);background:var(--bg-card);backdrop-filter:blur(10px);-webkit-backdrop-filter:blur(10px);border:1px solid var(--glass-border);border-radius:var(--radius-xl);margin-bottom:var(--spacing-xl);flex-wrap:wrap}.back-btn{display:flex;align-items:center;gap:var(--spacing-xs);background:rgba(255,255,255,0.05);border:1px solid var(--glass-border);border-radius:var(--radius-md);padding:var(--spacing-xs) var(--spacing-md);color:var(--text-muted);font-size:0.8rem;cursor:pointer;transition:all var(--transition-normal)}.back-btn:hover{background:rgba(255,255,255,0.1);color:var(--text-primary)}.back-btn svg{width:16px;height:16px}.page-title-group{display:flex;align-items:center;gap:var(--spacing-sm)}.page-badge{background:var(--gradient-primary);padding:3px var(--spacing-sm);border-radius:var(--radius-full);color:#fff;font-size:0.65rem;font-weight:600}.page-badge.success{background:linear-gradient(135deg,#22c55e,#16a34a)}.page-title{font-size:1.2rem;font-weight:700;color:var(--text-primary)}.page-status{display:flex;align-items:center;gap:var(--spacing-xs);padding:var(--spacing-xs) var(--spacing-sm);background:rgba(251,191,36,0.15);border-radius:var(--radius-full)}.page-status.success{background:rgba(74,222,128,0.15)}.status-dot{width:6px;height:6px;background:#fbbf24;border-radius:50%}.page-status.success .status-dot{background:#4ade80}.page-status span:last-child{color:var(--text-secondary);font-size:0.75rem;font-weight:500}.page-content{background:var(--bg-card);backdrop-filter:blur(10px);-webkit-backdrop-filter:blur(10px);border:1px solid var(--glass-border);border-radius:var(--radius-xl);padding:var(--spacing-xl);min-height:300px;max-width:900px;margin:0 auto}.page-actions{display:flex;justify-content:flex-end;gap:var(--spacing-md);margin-top:var(--spacing-xl);max-width:900px;margin-left:auto;margin-right:auto}.action-btn{display:flex;align-items:center;gap:var(--spacing-sm);padding:var(--spacing-sm) var(--spacing-lg);border-radius:var(--radius-md);font-size:0.85rem;font-weight:600;cursor:pointer;transition:all var(--transition-normal)}.action-btn svg{width:16px;height:16px}.action-btn.primary{background:var(--gradient-primary);border:none;color:#fff}.action-btn.primary:hover{transform:translateY(-2px);box-shadow:0 8px 25px rgba(99,102,241,0.35)}.action-btn.secondary{background:transparent;border:1px solid var(--glass-border);color:var(--text-muted)}.action-btn.secondary:hover{background:rgba(255,255,255,0.05);color:var(--text-primary)}.detail-section{margin-bottom:var(--spacing-lg)}.detail-section-title{color:var(--text-secondary);font-size:0.85rem;font-weight:600;margin-bottom:var(--spacing-sm);display:flex;align-items:center;gap:var(--spacing-xs)}.detail-text{color:var(--text-muted);font-size:0.85rem;line-height:1.7}.result-list{list-style:none;color:var(--text-muted);font-size:0.85rem}.result-list li{padding:var(--spacing-xs) 0;padding-left:var(--spacing-lg);position:relative}.result-list li::before{content:'•';position:absolute;left:0;color:#6366f1}.result-box{background:rgba(255,255,255,0.03);border:1px solid rgba(255,255,255,0.08);border-radius:var(--radius-md);padding:var(--spacing-md);margin-bottom:var(--spacing-lg)}.result-box.success{border-color:rgba(74,222,128,0.25);background:rgba(74,222,128,0.05)}.result-box.info{border-color:rgba(96,165,250,0.25);background:rgba(96,165,250,0.05)}.result-box.warning{border-color:rgba(251,191,36,0.25);background:rgba(251,191,36,0.05)}.result-title{color:var(--text-primary);font-weight:600;font-size:1rem;margin-bottom:var(--spacing-xs)}.detail-content{max-height:400px;overflow-y:auto;padding-right:var(--spacing-sm)}.detail-content::-webkit-scrollbar{width:4px}.detail-content::-webkit-scrollbar-track{background:rgba(255,255,255,0.05);border-radius:2px}.detail-content::-webkit-scrollbar-thumb{background:rgba(255,255,255,0.15);border-radius:2px}.detail-code{background:rgba(0,0,0,0.3);border-radius:var(--radius-md);padding:var(--spacing-md);font-family:'JetBrains Mono',monospace;font-size:0.75rem;color:var(--text-secondary);white-space:pre-wrap;word-break:break-word}.research-source{background:rgba(255,255,255,0.03);border:1px solid rgba(255,255,255,0.08);border-radius:var(--radius-md);margin-bottom:var(--spacing-md);overflow:hidden}.source-header{display:flex;align-items:center;gap:var(--spacing-sm);padding:var(--spacing-sm) var(--spacing-md);background:rgba(255,255,255,0.03);border-bottom:1px solid rgba(255,255,255,0.06)}.source-badge{font-size:0.65rem;font-weight:600;padding:2px 8px;border-radius:var(--radius-sm);text-transform:uppercase;letter-spacing:0.5px}.source-badge.web{background:rgba(99,102,241,0.2);color:#a5b4fc}.source-badge.wechat{background:rgba(37,211,102,0.2);color:#6ee7b7}.source-badge.xiaohongshu{background:rgba(251,113,133,0.2);color:#fda4af}.source-title{font-size:0.85rem;font-weight:500;color:var(--text-primary)}.source-content{padding:var(--spacing-md)}.source-url{display:flex;align-items:center;flex-wrap:wrap;gap:var(--spacing-sm);margin-bottom:var(--spacing-sm);padding:var(--spacing-xs) var(--spacing-sm);background:rgba(255,255,255,0.03);border-radius:var(--radius-sm)}.url-label{font-size:0.75rem;color:var(--text-muted)}.url-link{font-size:0.75rem;color:#60a5fa;text-decoration:none;word-break:break-all}.url-link:hover{color:#93c5fd;text-decoration:underline}.url-text{font-size:0.75rem;color:var(--text-muted)}.source-detail{margin-top:var(--spacing-sm);padding:var(--spacing-sm);background:rgba(0,0,0,0.15);border-radius:var(--radius-sm)}.source-detail strong{display:block;color:var(--text-primary);font-size:0.8rem;margin-bottom:var(--spacing-xs)}.source-detail p{margin-bottom:var(--spacing-xs);color:var(--text-muted);font-size:0.75rem;line-height:1.7}.source-content p{margin-bottom:var(--spacing-xs);color:var(--text-secondary);font-size:0.85rem}.source-content ul{list-style:none;margin:var(--spacing-sm) 0}.source-content ul li{position:relative;padding-left:var(--spacing-md);margin-bottom:var(--spacing-xs);color:var(--text-muted);font-size:0.8rem;line-height:1.6}.source-content ul li::before{content:'→';position:absolute;left:0;color:#6366f1}.source-quote{margin-top:var(--spacing-sm);padding:var(--spacing-sm);background:rgba(99,102,241,0.08);border-left:3px solid #6366f1;border-radius:0 var(--radius-sm) var(--radius-sm) 0;font-style:italic;color:var(--text-secondary);font-size:0.8rem}.concept-card{background:rgba(255,255,255,0.03);border:1px solid rgba(255,255,255,0.08);border-radius:var(--radius-md);padding:var(--spacing-md);margin-bottom:var(--spacing-sm)}.concept-card h5{color:var(--text-primary);font-size:0.9rem;margin-bottom:var(--spacing-xs)}.concept-desc{color:var(--text-muted);font-size:0.8rem;line-height:1.7}.stats-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:var(--spacing-md);margin-top:var(--spacing-sm)}.stat-card{background:rgba(255,255,255,0.03);border:1px solid rgba(255,255,255,0.08);border-radius:var(--radius-md);padding:var(--spacing-md);text-align:center}.stat-value{font-size:1.8rem;font-weight:700;background:var(--gradient-primary);-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text;line-height:1.2}.stat-label{font-size:0.75rem;color:var(--text-muted);margin-top:var(--spacing-xs)}.stat-label-en{font-size:0.65rem;color:var(--text-hint)}.scenario-list{display:flex;flex-direction:column;gap:var(--spacing-sm)}.scenario-item{display:flex;gap:var(--spacing-md);background:rgba(255,255,255,0.03);border:1px solid rgba(255,255,255,0.08);border-radius:var(--radius-md);padding:var(--spacing-md)}.scenario-num{font-size:1.2rem;font-weight:700;color:#6366f1;min-width:2rem}.scenario-content h5{color:var(--text-primary);font-size:0.9rem;margin-bottom:var(--spacing-xs)}.scenario-content p{color:var(--text-muted);font-size:0.8rem}.credibility-grid{display:flex;flex-direction:column;gap:var(--spacing-sm)}.cred-item{display:flex;align-items:center;gap:var(--spacing-md)}.cred-label{min-width:140px;font-size:0.8rem;color:var(--text-secondary)}.cred-bar{flex:1;height:8px;background:rgba(255,255,255,0.1);border-radius:4px;overflow:hidden}.cred-fill{height:100%;background:linear-gradient(90deg,#6366f1,#8b5cf6);border-radius:4px;transition:width 0.5s ease}.cred-bar.green .cred-fill{background:linear-gradient(90deg,#10b981,#34d399)}.cred-score{min-width:40px;text-align:right;font-size:0.8rem;color:var(--text-muted)}.cred-score.highlight{color:#4ade80;font-weight:600}.confirm-box{background:rgba(99,102,241,0.08);border:1px solid rgba(99,102,241,0.2);border-radius:var(--radius-md);padding:var(--spacing-md)}.confirm-box p{margin-bottom:var(--spacing-xs);font-size:0.85rem;color:var(--text-secondary)}.confirm-question{margin-top:var(--spacing-md);padding-top:var(--spacing-md);border-top:1px solid rgba(255,255,255,0.1);color:var(--text-primary);font-weight:500}.feedback-section{margin-top:var(--spacing-lg);padding-top:var(--spacing-md);border-top:1px dashed rgba(255,255,255,0.2)}.feedback-label{font-size:0.8rem;color:var(--text-secondary);margin-bottom:var(--spacing-sm)}.adjustment-notice{display:flex;align-items:flex-start;gap:var(--spacing-sm);padding:var(--spacing-md);background:rgba(251,191,36,0.1);border:1px solid rgba(251,191,36,0.3);border-radius:var(--radius-md);margin-bottom:var(--spacing-lg)}.adjustment-icon{font-size:1.2rem;line-height:1}.adjustment-text{font-size:0.8rem;color:var(--text-secondary);line-height:1.6}.adjustment-text em{color:#fbbf24;font-style:italic}.updated-badge{display:inline-block;padding:2px 8px;background:linear-gradient(135deg,#10b981,#34d399);border-radius:var(--radius-sm);font-size:0.65rem;font-weight:600;color:white;margin-left:var(--spacing-sm);text-transform:uppercase;letter-spacing:0.5px}.source-detail{margin-top:var(--spacing-sm);padding:var(--spacing-sm);background:rgba(0,0,0,0.2);border-radius:var(--radius-sm)}.source-detail p{margin-bottom:var(--spacing-xs);color:var(--text-muted);font-size:0.75rem;line-height:1.7}.source-detail strong{color:var(--text-secondary)}.feedback-input{width:100%;min-height:100px;padding:var(--spacing-md);background:rgba(0,0,0,0.3);border:1px solid rgba(255,255,255,0.15);border-radius:var(--radius-md);color:var(--text-primary);font-size:0.85rem;font-family:'Inter',sans-serif;resize:vertical;line-height:1.6}.feedback-input:focus{outline:none;border-color:#6366f1;box-shadow:0 0 0 3px rgba(99,102,241,0.3)}.feedback-input::placeholder{color:var(--text-hint)}.feedback-submit-btn{margin-top:var(--spacing-sm);padding:var(--spacing-sm) var(--spacing-md);background:linear-gradient(135deg,#6366f1,#8b5cf6);border:none;border-radius:var(--radius-md);color:white;font-size:0.8rem;font-weight:500;cursor:pointer;transition:all var(--transition-fast)}.feedback-submit-btn:hover{transform:translateY(-1px);box-shadow:0 4px 12px rgba(99,102,241,0.3)}.feedback-submit-btn:active{transform:translateY(0)}@media (max-width:768px){.stats-grid{grid-template-columns:repeat(2,1fr)}.cred-item{flex-wrap:wrap}.cred-label{min-width:100%}.cred-bar{order:3}}.footer{position:relative;padding:var(--spacing-xl) var(--spacing-lg);border-top:1px solid rgba(255,255,255,0.06);z-index:2}.footer-content{max-width:500px;margin:0 auto;text-align:center}.footer-logo{display:flex;align-items:center;justify-content:center;gap:var(--spacing-sm);margin-bottom:var(--spacing-sm);color:var(--text-primary);font-weight:600;font-size:0.9rem}.footer-text{color:var(--text-muted);font-size:0.8rem;margin-bottom:var(--spacing-xs)}.footer-copyright{color:var(--text-hint);font-size:0.7rem}#toastContainer{position:fixed;bottom:var(--spacing-lg);right:var(--spacing-lg);z-index:1000;display:flex;flex-direction:column;gap:var(--spacing-xs)}.toast{background:rgba(30,30,50,0.95);backdrop-filter:blur(10px);border:1px solid var(--glass-border);border-radius:var(--radius-md);padding:var(--spacing-sm) var(--spacing-md);color:var(--text-primary);font-size:0.8rem;display:flex;align-items:center;gap:var(--spacing-sm);animation:slideIn 0.3s ease;box-shadow:0 8px 25px rgba(0,0,0,0.3)}.toast.success{border-color:rgba(74,222,128,0.3)}.toast.success::before{content:'✓';color:#4ade80;font-weight:bold}.toast.error{border-color:rgba(248,113,113,0.3)}.toast.error::before{content:'✕';color:#f87171;font-weight:bold}@keyframes slideIn{from{opacity:0;transform:translateX(100%)}to{opacity:1;transform:translateX(0)}}@keyframes fadeInUp{from{opacity:0;transform:translateY(15px)}to{opacity:1;transform:translateY(0)}}@media (max-width:768px){html{font-size:14px}.nav-links{display:none}.options-grid{grid-template-columns:1fr}.page-header{flex-direction:column;align-items:flex-start}.page-actions{flex-direction:column}.action-btn{width:100%;justify-content:center}.hero-title{font-size:1.8rem}}@media (max-width:480px){.hero-title{font-size:1.5rem}.length-options{flex-direction:column}}.main-container{position:relative;z-index:2;min-height:100vh;padding-top:80px}.page{display:none;min-height:100vh;padding:var(--spacing-xl) var(--spacing-lg);max-width:1200px;margin:0 auto;animation:fadeInUp 0.5s ease}.page.active{display:block}.page-header{display:flex;justify-content:space-between;align-items:center;margin-bottom:var(--spacing-xl);padding-bottom:var(--spacing-lg);border-bottom:1px solid rgba(255,255,255,0.08);gap:var(--spacing-md);flex-wrap:wrap}.back-btn{display:flex;align-items:center;gap:var(--spacing-xs);background:transparent;border:1px solid var(--glass-border);color:var(--text-muted);padding:var(--spacing-sm) var(--spacing-md);border-radius:var(--radius-md);cursor:pointer;font-size:0.85rem;transition:all var(--transition-normal)}.back-btn:hover{background:rgba(255,255,255,0.05);color:var(--text-primary)}.back-btn svg{width:16px;height:16px}.page-title-group{display:flex;align-items:center;gap:var(--spacing-sm)}.page-badge{background:var(--gradient-primary);padding:var(--spacing-xs) var(--spacing-sm);border-radius:var(--radius-full);color:#fff;font-size:0.7rem;font-weight:600}.page-badge.success{background:linear-gradient(135deg,#4ade80,#22c55e)}.page-title{font-size:1.3rem;font-weight:700;color:var(--text-primary);margin:0}.page-status{display:flex;align-items:center;gap:var(--spacing-xs);padding:var(--spacing-xs) var(--spacing-sm);background:rgba(251,191,36,0.15);border-radius:var(--radius-full)}.page-status.success{background:rgba(74,222,128,0.15)}.page-status .status-dot{width:8px;height:8px;background:#fbbf24;border-radius:50%}.page-status.success .status-dot{background:#4ade80}.page-status span:last-child{font-size:0.75rem;color:var(--text-muted)}.page-content{background:var(--bg-card);backdrop-filter:blur(10px);-webkit-backdrop-filter:blur(10px);border:1px solid var(--glass-border);border-radius:var(--radius-xl);padding:var(--spacing-xl);min-height:400px}.page-actions{display:flex;justify-content:flex-end;gap:var(--spacing-md);margin-top:var(--spacing-xl);padding-top:var(--spacing-lg);border-top:1px solid rgba(255,255,255,0.08)}.action-btn{display:flex;align-items:center;justify-content:center;gap:var(--spacing-xs);padding:var(--spacing-md) var(--spacing-xl);border-radius:var(--radius-md);font-size:0.85rem;font-weight:600;cursor:pointer;transition:all var(--transition-normal);border:none}.action-btn svg{width:16px;height:16px}.action-btn.primary{background:var(--gradient-primary);color:#fff}.action-btn.primary:hover{transform:translateY(-2px);box-shadow:0 8px 25px rgba(99,102,241,0.35)}.action-btn.secondary{background:transparent;border:1px solid var(--glass-border);color:var(--text-muted)}.action-btn.secondary:hover{background:rgba(255,255,255,0.05);color:var(--text-primary)}.hero{position:relative;min-height:80vh;display:flex;flex-direction:column;align-items:center;justify-content:center;padding:var(--spacing-2xl) var(--spacing-lg)}.hero-content{max-width:720px;width:100%;text-align:center}.hero-badge{display:inline-flex;align-items:center;gap:var(--spacing-sm);background:rgba(99,102,241,0.15);border:1px solid rgba(99,102,241,0.3);border-radius:var(--radius-full);padding:var(--spacing-xs) var(--spacing-md);margin-bottom:var(--spacing-lg);animation:fadeInUp 0.6s ease}.badge-dot{width:6px;height:6px;background:#4ade80;border-radius:50%}.hero-badge span:last-child{color:var(--text-secondary);font-size:0.75rem;font-weight:500;letter-spacing:0.5px}.hero-title{font-size:clamp(2rem,5vw,3rem);font-weight:800;color:var(--text-primary);line-height:1.2;margin-bottom:var(--spacing-md);animation:fadeInUp 0.6s ease 0.1s both}.hero-subtitle{font-size:0.95rem;color:var(--text-muted);margin-bottom:var(--spacing-2xl);line-height:1.7;animation:fadeInUp 0.6s ease 0.2s both}.input-card{background:var(--bg-card);backdrop-filter:blur(10px);-webkit-backdrop-filter:blur(10px);border:1px solid var(--glass-border);border-radius:var(--radius-xl);padding:var(--spacing-lg);animation:fadeInUp 0.6s ease 0.3s both}.input-header{display:flex;justify-content:space-between;align-items:center;margin-bottom:var(--spacing-sm)}.input-label{color:var(--text-primary);font-weight:600;font-size:0.8rem}.input-wrapper{position:relative;margin-bottom:var(--spacing-md)}.topic-input{width:100%;background:rgba(0,0,0,0.4);border:1px solid var(--glass-border);border-radius:var(--radius-md);padding:var(--spacing-md);color:var(--text-primary);font-size:0.9rem;outline:none;transition:all var(--transition-normal)}.topic-input::placeholder{color:var(--text-hint)}.topic-input:focus{border-color:rgba(99,102,241,0.6);box-shadow:0 0 0 3px rgba(99,102,241,0.15)}.input-glow{position:absolute;top:50%;left:50%;transform:translate(-50%,-50%);width:100%;height:100%;background:var(--gradient-primary);border-radius:var(--radius-md);filter:blur(50px);opacity:0;transition:opacity var(--transition-normal);pointer-events:none}.topic-input:focus+.input-glow{opacity:0.15}.options-grid{display:grid;grid-template-columns:2fr 1fr;gap:var(--spacing-md);margin-bottom:var(--spacing-lg)}.option-group{display:flex;flex-direction:column;gap:var(--spacing-xs)}.option-label{color:var(--text-muted);font-size:0.75rem;font-weight:500;margin-bottom:var(--spacing-xs)}.length-options{display:flex;gap:var(--spacing-sm)}.length-btn{flex:1;display:flex;flex-direction:column;align-items:center;gap:2px;background:rgba(255,255,255,0.03);border:1px solid var(--glass-border);border-radius:var(--radius-md);padding:var(--spacing-sm) var(--spacing-md);cursor:pointer;transition:all var(--transition-normal)}.length-btn:hover{background:rgba(255,255,255,0.06);border-color:rgba(255,255,255,0.2)}.length-btn.active{background:rgba(99,102,241,0.15);border-color:rgba(99,102,241,0.5)}.length-icon{font-size:1.2rem}.length-text{color:var(--text-primary);font-size:0.8rem;font-weight:600}.length-desc{color:var(--text-hint);font-size:0.65rem}.audience-select{width:100%;background:rgba(0,0,0,0.4);border:1px solid var(--glass-border);border-radius:var(--radius-md);padding:var(--spacing-sm) var(--spacing-md);color:var(--text-primary);font-size:0.8rem;outline:none;cursor:pointer;transition:all var(--transition-normal)}.audience-select:focus{border-color:rgba(99,102,241,0.6)}.audience-select option{background:#1a1a2e;color:var(--text-primary)}.start-btn{position:relative;width:100%;background:var(--gradient-primary);border:none;border-radius:var(--radius-md);padding:var(--spacing-md);cursor:pointer;overflow:hidden;transition:all var(--transition-normal)}.start-btn:hover{transform:translateY(-2px);box-shadow:0 8px 30px rgba(99,102,241,0.35)}.btn-content{display:flex;align-items:center;justify-content:center;gap:var(--spacing-sm);color:#fff;font-size:0.95rem;font-weight:600;position:relative;z-index:1}.btn-icon{width:18px;height:18px}.btn-shine{position:absolute;top:0;left:-100%;width:100%;height:100%;background:linear-gradient(90deg,transparent,rgba(255,255,255,0.25),transparent);transition:left 0.5s ease}.start-btn:hover .btn-shine{left:100%}.features-section{padding:var(--spacing-3xl) var(--spacing-lg)}.features-container{max-width:1000px;margin:0 auto}.features-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(280px,1fr));gap:var(--spacing-lg)}.feature-card{background:var(--bg-card);backdrop-filter:blur(10px);border:1px solid var(--glass-border);border-radius:var(--radius-lg);padding:var(--spacing-lg);transition:all var(--transition-normal)}.feature-card:hover{transform:translateY(-5px);border-color:rgba(99,102,241,0.3);box-shadow:0 15px 35px rgba(0,0,0,0.2)}.feature-card.highlight{background:linear-gradient(135deg,rgba(99,102,241,0.08),rgba(139,92,246,0.08));border-color:rgba(99,102,241,0.25)}.feature-icon{font-size:1.8rem;margin-bottom:var(--spacing-md)}.feature-title{color:var(--text-primary);font-size:0.95rem;font-weight:600;margin-bottom:var(--spacing-xs)}.feature-desc{color:var(--text-muted);font-size:0.8rem;line-height:1.6}.test-panel{margin-top:2rem;background:linear-gradient(135deg,rgba(245,158,11,0.1),rgba(239,68,68,0.1));border:1px dashed rgba(245,158,11,0.4);border-radius:var(--radius-lg);overflow:hidden;max-width:500px;margin-left:auto;margin-right:auto}.test-panel-header{display:flex;align-items:center;gap:0.5rem;padding:0.75rem 1rem;background:rgba(245,158,11,0.15);border-bottom:1px dashed rgba(245,158,11,0.3);font-size:0.85rem;font-weight:600;color:#fbbf24}.test-badge{margin-left:auto;background:rgba(239,68,68,0.3);color:#fca5a5;padding:0.15rem 0.5rem;border-radius:4px;font-size:0.7rem;font-weight:700;letter-spacing:0.5px}.test-panel-content{padding:1rem}.test-section{margin-bottom:1rem}.test-section:last-child{margin-bottom:0}.test-section-title{font-size:0.8rem;color:var(--text-muted);margin-bottom:0.5rem;font-weight:500}.test-buttons{display:grid;grid-template-columns:repeat(6,1fr);gap:0.5rem}.test-btn{background:rgba(255,255,255,0.08);border:1px solid rgba(255,255,255,0.15);border-radius:var(--radius-sm);padding:0.5rem 0.25rem;color:var(--text-secondary);font-size:0.7rem;cursor:pointer;transition:all var(--transition-fast);text-align:center}.test-btn:hover{background:rgba(99,102,241,0.2);border-color:rgba(99,102,241,0.4);color:#a5b4fc;transform:translateY(-2px)}.test-btn small{display:block;font-size:0.6rem;color:var(--text-hint);margin-top:2px}.test-import-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:0.5rem}.test-import-btn{display:flex;align-items:center;justify-content:center;background:rgba(34,197,94,0.1);border:1px solid rgba(34,197,94,0.3);border-radius:var(--radius-sm);padding:0.5rem;color:#86efac;font-size:0.75rem;cursor:pointer;transition:all var(--transition-fast)}.test-import-btn:hover{background:rgba(34,197,94,0.2);border-color:rgba(34,197,94,0.5)}.action-btn.export{background:linear-gradient(135deg,#059669 0%,#047857 100%)}.action-btn.export:hover{background:linear-gradient(135deg,#10b981 0%,#059669 100%);transform:translateY(-2px);box-shadow:0 4px 12px rgba(16,185,129,0.3)}.action-btn.import{background:linear-gradient(135deg,#0891b2 0%,#0e7490 100%);cursor:pointer;display:inline-flex;align-items:center;gap:0.5rem}.action-btn.import:hover{background:linear-gradient(135deg,#06b6d4 0%,#0891b2 100%);transform:translateY(-2px);box-shadow:0 4px 12px rgba(6,182,212,0.3)}