:root{--bg-primary: #0a1628;--bg-secondary: #0d1f3c;--bg-card: rgba(16, 42, 88, .6);--bg-card-hover: rgba(20, 55, 110, .8);--border-color: rgba(59, 130, 246, .3);--border-glow: rgba(59, 130, 246, .5);--text-primary: #f0f4f8;--text-secondary: #94a3b8;--text-muted: #64748b;--text-accent: #60a5fa;--gradient-blue: linear-gradient(135deg, #1e40af 0%, #3b82f6 50%, #06b6d4 100%);--gradient-dark: linear-gradient(180deg, #0a1628 0%, #0d1f3c 100%);--gradient-card: linear-gradient(135deg, rgba(30, 64, 175, .15) 0%, rgba(6, 182, 212, .1) 100%);--accent-blue: #3b82f6;--accent-cyan: #06b6d4;--accent-green: #10b981;--accent-orange: #f59e0b;--accent-red: #ef4444;--accent-purple: #8b5cf6;--shadow-glow: 0 0 20px rgba(59, 130, 246, .3);--shadow-card: 0 4px 20px rgba(0, 0, 0, .4);--radius-sm: 8px;--radius-md: 12px;--radius-lg: 16px;--radius-xl: 24px}*{margin:0;padding:0;box-sizing:border-box}html,body,#root{width:100%;height:100%;overflow:hidden}body{font-family:-apple-system,BlinkMacSystemFont,Segoe UI,PingFang SC,Hiragino Sans GB,Microsoft YaHei,sans-serif;background:var(--gradient-dark);color:var(--text-primary);line-height:1.6;-webkit-font-smoothing:antialiased}.app{width:100vw;height:100vh;display:flex;flex-direction:column;background:var(--gradient-dark);position:relative}.top-bar{display:flex;justify-content:space-between;align-items:center;padding:12px 24px;background:#0a1628e6;border-bottom:1px solid var(--border-color);-webkit-backdrop-filter:blur(10px);backdrop-filter:blur(10px);z-index:100}.voice-controls{display:flex;align-items:center;gap:8px}.voice-label{font-size:14px;color:var(--text-secondary);margin-right:8px}.voice-btn{padding:6px 16px;border:1px solid var(--border-color);background:transparent;color:var(--text-secondary);border-radius:var(--radius-sm);cursor:pointer;font-size:13px;transition:all .3s ease}.voice-btn:hover{border-color:var(--accent-blue);color:var(--text-accent)}.voice-btn.active{background:var(--gradient-blue);border-color:transparent;color:#fff;box-shadow:var(--shadow-glow)}.autoplay-toggle{display:flex;align-items:center;gap:8px}.toggle-label{display:flex;align-items:center;gap:8px;cursor:pointer;font-size:14px;color:var(--text-secondary)}.toggle-label input[type=checkbox]{width:18px;height:18px;accent-color:var(--accent-blue)}.slide-container{flex:1;display:flex;align-items:center;justify-content:center;padding:40px 60px;overflow:hidden;position:relative}.slide-container:before{content:"";position:absolute;top:-50%;right:-20%;width:600px;height:600px;background:radial-gradient(circle,rgba(59,130,246,.1) 0%,transparent 70%);pointer-events:none}.slide-container:after{content:"";position:absolute;bottom:-30%;left:-10%;width:500px;height:500px;background:radial-gradient(circle,rgba(6,182,212,.08) 0%,transparent 70%);pointer-events:none}.chapter-content{width:100%;max-width:1200px;height:100%;max-height:calc(100vh - 200px);display:flex;flex-direction:column;position:relative;z-index:1;overflow-y:auto;padding-right:8px}.transition-slide{display:flex;flex-direction:column;align-items:center;justify-content:center;text-align:center;height:100%;gap:24px}.chapter-badge{display:inline-flex;align-items:center;justify-content:center;padding:8px 24px;background:var(--gradient-blue);color:#fff;font-size:14px;font-weight:600;border-radius:100px;letter-spacing:2px;box-shadow:var(--shadow-glow)}.chapter-icon{font-size:64px;margin-bottom:8px;filter:drop-shadow(0 0 20px rgba(59,130,246,.5))}.main-title{font-size:52px;font-weight:800;background:linear-gradient(135deg,#fff,#60a5fa,#06b6d4);-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text;line-height:1.2}.subtitle{font-size:22px;color:var(--text-secondary);font-weight:400}.content-slide{display:flex;flex-direction:column;height:100%;gap:20px;overflow-y:auto}.slide-header{display:flex;align-items:center;gap:12px;padding-bottom:16px;border-bottom:1px solid var(--border-color)}.slide-header-icon{font-size:32px}.slide-header-text h2{font-size:28px;font-weight:700;color:var(--text-primary);margin:0}.slide-header-text .ppt-title{font-size:16px;color:var(--text-accent);margin-top:4px}.card{background:var(--gradient-card);border:1px solid var(--border-color);border-radius:var(--radius-md);padding:24px;-webkit-backdrop-filter:blur(10px);backdrop-filter:blur(10px);transition:all .3s ease}.card:hover{border-color:var(--border-glow);box-shadow:var(--shadow-glow)}.card-title{display:flex;align-items:center;gap:10px;font-size:20px;font-weight:700;color:var(--text-primary);margin-bottom:16px}.card-title .icon{font-size:24px}.card-body{color:var(--text-secondary);font-size:15px;line-height:1.8}.card-body p{margin-bottom:12px}.card-body p:last-child{margin-bottom:0}.tag{display:inline-flex;align-items:center;padding:4px 12px;border-radius:100px;font-size:12px;font-weight:600;letter-spacing:.5px}.tag-blue{background:#3b82f633;color:#60a5fa;border:1px solid rgba(59,130,246,.3)}.tag-green{background:#10b98133;color:#34d399;border:1px solid rgba(16,185,129,.3)}.tag-orange{background:#f59e0b33;color:#fbbf24;border:1px solid rgba(245,158,11,.3)}.tag-red{background:#ef444433;color:#f87171;border:1px solid rgba(239,68,68,.3)}.tag-purple{background:#8b5cf633;color:#a78bfa;border:1px solid rgba(139,92,246,.3)}.quote-box{background:linear-gradient(135deg,#3b82f61a,#06b6d41a);border-left:4px solid var(--accent-blue);border-radius:0 var(--radius-md) var(--radius-md) 0;padding:20px 24px;margin:16px 0}.quote-box p{font-size:18px;font-style:italic;color:var(--text-primary);line-height:1.8}.quote-author{display:block;margin-top:12px;font-size:14px;color:var(--text-accent);font-weight:600}.bullet-list{list-style:none;padding:0;margin:0}.bullet-list li{position:relative;padding-left:24px;margin-bottom:12px;color:var(--text-secondary);font-size:15px;line-height:1.7}.bullet-list li:before{content:"▸";position:absolute;left:0;color:var(--accent-blue);font-weight:700}.data-table{width:100%;border-collapse:collapse;margin:16px 0;font-size:14px}.data-table th{background:#3b82f633;color:var(--text-accent);font-weight:600;padding:12px 16px;text-align:left;border-bottom:2px solid var(--border-color)}.data-table td{padding:12px 16px;border-bottom:1px solid var(--border-color);color:var(--text-secondary)}.data-table tr:hover td{background:#3b82f60d}.dialogue-box{background:#102a5866;border-radius:var(--radius-md);padding:20px;margin:16px 0}.dialogue-line{display:flex;gap:12px;margin-bottom:12px;font-size:15px;line-height:1.7}.dialogue-line:last-child{margin-bottom:0}.dialogue-speaker{font-weight:700;color:var(--text-accent);white-space:nowrap;min-width:60px}.dialogue-text{color:var(--text-secondary)}.highlight-box{background:linear-gradient(135deg,#f59e0b1a,#f59e0b0d);border:1px solid rgba(245,158,11,.3);border-radius:var(--radius-md);padding:20px;margin:16px 0}.highlight-box .highlight-label{font-size:14px;font-weight:700;color:var(--accent-orange);margin-bottom:8px;display:flex;align-items:center;gap:6px}.grid-2{display:grid;grid-template-columns:1fr 1fr;gap:20px}.grid-3{display:grid;grid-template-columns:repeat(3,1fr);gap:20px}.progress-bar{height:3px;background:#ffffff1a;position:relative}.progress-fill{height:100%;background:var(--gradient-blue);transition:width .5s ease;box-shadow:0 0 10px #3b82f680}.controls{display:flex;justify-content:space-between;align-items:center;padding:16px 24px;background:#0a1628e6;border-top:1px solid var(--border-color);-webkit-backdrop-filter:blur(10px);backdrop-filter:blur(10px)}.controls button{padding:10px 24px;border:1px solid var(--border-color);background:transparent;color:var(--text-secondary);border-radius:var(--radius-sm);cursor:pointer;font-size:14px;transition:all .3s ease}.controls button:hover:not(:disabled){border-color:var(--accent-blue);color:var(--text-accent);background:#3b82f61a}.controls button:disabled{opacity:.3;cursor:not-allowed}.step-info{font-size:14px;color:var(--text-muted);font-weight:500}.narration-panel{display:flex;align-items:flex-start;gap:16px;padding:16px 24px;background:#0a1628f2;border-top:1px solid var(--border-color);max-height:120px;overflow-y:auto}.narration-text{flex:1;font-size:14px;color:var(--text-secondary);line-height:1.6;font-style:italic}.play-btn{padding:8px 16px;background:var(--gradient-blue);border:none;color:#fff;border-radius:var(--radius-sm);cursor:pointer;font-size:14px;white-space:nowrap;transition:all .3s ease}.play-btn:hover{box-shadow:var(--shadow-glow);transform:translateY(-1px)}@keyframes fadeIn{0%{opacity:0;transform:translateY(20px)}to{opacity:1;transform:translateY(0)}}.fade-in{animation:fadeIn .6s ease forwards}::-webkit-scrollbar{width:6px}::-webkit-scrollbar-track{background:transparent}::-webkit-scrollbar-thumb{background:var(--border-color);border-radius:3px}::-webkit-scrollbar-thumb:hover{background:var(--border-glow)}@media (max-width: 1024px){.slide-container{padding:20px 30px}.main-title{font-size:36px}.grid-2,.grid-3{grid-template-columns:1fr}}