body{margin:0;padding:0}:root{--bg:#fff;--bg-sidebar:#f9f9f9;--bg-bubble:#f4f4f4;--bg-hover:#ececec;--text:#212121;--text-secondary:#6b6b76;--text-caption:#9b9b9b;--accent:#0fa47f;--accent-hover:#0d9473;--border:#e3e3e3;--danger:#ef4444;--shadow:0 4px 24px #0000000f;--radius:12px;--radius-lg:16px;--radius-pill:24px;font-family:-apple-system,BlinkMacSystemFont,PingFang SC,Segoe UI,sans-serif}*{box-sizing:border-box;margin:0;padding:0}body{background:var(--bg);color:var(--text);font-size:15px;line-height:1.6}.app{height:100vh;display:flex;overflow:hidden}.main{flex-direction:column;flex:1;width:100%;max-width:720px;margin:0 auto;display:flex}.overlay{z-index:90;background:#0000004d;position:fixed;inset:0}.navbar{border-bottom:1px solid var(--border);flex-shrink:0;align-items:center;gap:12px;height:56px;padding:0 20px;display:flex}.menu-btn{cursor:pointer;background:0 0;border:none;border-radius:8px;padding:4px 8px;font-size:22px}.menu-btn:hover{background:var(--bg-hover)}.nav-title{flex:1;font-size:17px;font-weight:600}.ad-badge{color:var(--text-secondary);background:#f4f4f4;border-radius:20px;padding:4px 12px;font-size:12px}.ad-badge.free{color:var(--accent);background:#0fa47f14}.chat-area{flex:1;padding:24px 20px;overflow-y:auto}.empty{text-align:center;flex-direction:column;justify-content:center;align-items:center;height:60vh;display:flex}.empty-logo{margin-bottom:20px;font-size:64px}.empty h2{margin-bottom:8px;font-size:20px}.empty p{color:var(--text-secondary);font-size:14px}.user-bubble-wrapper{justify-content:flex-end;margin-bottom:20px;display:flex}.user-bubble{background:var(--bg-bubble);border-radius:var(--radius-lg);max-width:80%;padding:16px 20px}.bubble-head{align-items:center;gap:6px;margin-bottom:6px;font-size:13px;display:flex}.bubble-platform{color:var(--text-secondary)}.bubble-url{color:var(--text-secondary);word-break:break-all;margin-bottom:4px;font-size:13px}.bubble-title{margin-top:6px;font-size:15px;font-weight:600}.bubble-status{color:var(--text-secondary);margin-top:6px;font-size:12px}.ai-card{border-radius:var(--radius);margin-bottom:20px;padding:20px}.ai-card-error{text-align:center;padding:36px 20px}.loading-dots{gap:6px;margin-bottom:10px;display:flex}.dot{background:var(--accent);border-radius:50%;width:8px;height:8px;animation:1.5s ease-in-out infinite pulse}.dot:nth-child(2){animation-delay:.2s}.dot:nth-child(3){animation-delay:.4s}@keyframes pulse{0%,60%,to{opacity:.3;transform:scale(.8)}30%{opacity:1;transform:scale(1)}}.loading-text{color:var(--text-secondary);font-size:15px}.video-info{margin-bottom:16px}.video-title{margin-bottom:4px;font-size:16px;font-weight:600}.video-meta{color:var(--text-secondary);font-size:13px}.image-grid{margin-bottom:16px}.image-item{border-radius:8px;width:100%;margin-bottom:8px}.card-actions{flex-wrap:wrap;gap:10px;display:flex}.btn-primary{background:var(--accent);color:#fff;cursor:pointer;border:none;border-radius:8px;flex:1;min-width:140px;padding:10px 16px;font-size:14px;font-weight:500}.btn-primary:hover{background:var(--accent-hover)}.btn-secondary{min-width:140px;color:var(--accent);border:1px solid var(--border);cursor:pointer;background:0 0;border-radius:8px;flex:1;padding:10px 16px;font-size:14px}.btn-secondary:hover{background:var(--bg-hover)}.progress-bar{background:#e5e5e5;border-radius:2px;height:4px;margin:14px 0 6px;overflow:hidden}.progress-fill{background:var(--accent);border-radius:2px;width:65%;height:100%;animation:2s ease-in-out infinite progressAnim}@keyframes progressAnim{0%{width:0%}50%{width:70%}to{width:95%}}.progress-text{color:var(--text-secondary);font-size:12px}.card-head{justify-content:space-between;align-items:center;margin-bottom:16px;display:flex}.card-head-title{font-size:16px;font-weight:600}.card-head-lang{color:var(--text-secondary);background:#f4f4f4;border-radius:6px;padding:2px 8px;font-size:12px}.transcript-body{margin-bottom:12px}.transcript-line{margin-bottom:10px;line-height:1.7}.timestamp{color:var(--text-caption);margin-right:6px;font-size:12px}.line-text{font-size:15px}.divider{background:var(--border);height:1px;margin:16px 0}.error-icon{margin-bottom:12px;font-size:40px;display:block}.error-msg{color:var(--text-secondary);margin-bottom:14px;font-size:14px;display:block}.btn-retry{border:1px solid var(--border);cursor:pointer;background:0 0;border-radius:8px;padding:8px 24px;font-size:14px}.input-wrapper{flex-shrink:0;padding:12px 20px 24px}.input-box{background:var(--bg);border-radius:var(--radius-pill);box-shadow:var(--shadow);border:1px solid var(--border);align-items:center;padding:6px 16px;display:flex}.input-icon{opacity:.5;margin-right:10px;font-size:20px}.input-field{color:var(--text);background:0 0;border:none;outline:none;flex:1;padding:8px 0;font-size:15px}.input-field::placeholder{color:var(--text-caption)}.send-btn{background:var(--accent);color:#fff;cursor:pointer;border:none;border-radius:50%;flex-shrink:0;justify-content:center;align-items:center;width:36px;height:36px;font-size:16px;display:flex}.send-btn:hover{background:var(--accent-hover)}.input-hint{text-align:center;color:var(--text-caption);margin-top:8px;font-size:12px}.sidebar{background:var(--bg-sidebar);z-index:100;flex-direction:column;width:280px;padding:16px;transition:left .25s;display:flex;position:fixed;top:0;bottom:0;left:-280px}.sidebar.open{left:0}.sidebar-header{justify-content:space-between;align-items:center;margin-bottom:16px;display:flex}.sidebar-title{font-size:17px;font-weight:600}.sidebar-close{cursor:pointer;background:0 0;border:none;border-radius:6px;padding:4px 8px;font-size:18px}.sidebar-close:hover{background:var(--bg-hover)}.new-chat-btn{border:1px solid var(--border);cursor:pointer;background:0 0;border-radius:8px;width:100%;margin-bottom:20px;padding:10px;font-size:14px}.new-chat-btn:hover{background:var(--bg-hover)}.sidebar-section{flex:1;overflow-y:auto}.sidebar-label{color:var(--text-caption);padding:8px 0;font-size:12px}.sidebar-empty{color:var(--text-caption);padding:12px 0;font-size:13px}.sidebar-item{cursor:pointer;border-radius:8px;align-items:center;gap:8px;padding:10px 12px;font-size:14px;display:flex}.sidebar-item:hover{background:var(--bg-hover)}.sidebar-item-title{text-overflow:ellipsis;white-space:nowrap;overflow:hidden}.sidebar-footer{border-top:1px solid var(--border);margin-top:auto;padding-top:12px}.sidebar-ad-status{border-radius:8px;margin-bottom:8px;padding:8px 12px;font-size:13px}.sidebar-ad-status.free{color:var(--accent);background:#0fa47f14}.sidebar-links{color:var(--text-secondary);gap:16px;font-size:13px;display:flex}.ad-placeholder{color:#999;background:#f0f0f0;border-radius:8px;justify-content:center;align-items:center;min-height:100px;margin-bottom:12px;font-size:12px;display:flex}.ad-placeholder:after{content:"📺 广告位（待接入）"}.ad-overlay{z-index:200;background:#00000080;justify-content:center;align-items:center;padding:20px;display:flex;position:fixed;inset:0}.ad-modal{background:#fff;border-radius:16px;width:100%;max-width:380px;overflow:hidden;box-shadow:0 20px 60px #0003}.ad-modal-header{justify-content:space-between;align-items:center;padding:16px 20px 12px;font-size:14px;font-weight:600;display:flex}.ad-timer{color:var(--accent);font-size:13px;font-weight:500}.ad-content{background:#fafafa;justify-content:center;align-items:center;min-height:200px;padding:12px 20px;display:flex}.ad-placeholder-card{text-align:center;padding:30px}.ad-placeholder-icon{margin-bottom:12px;font-size:48px}.ad-placeholder-title{color:#333;margin-bottom:8px;font-size:18px;font-weight:600}.ad-placeholder-desc{color:#999;font-size:13px}.ad-modal-footer{text-align:center;padding:12px 20px 16px}.ad-unlock-info{color:var(--text-secondary);margin-bottom:8px;font-size:13px}.ad-close-btn{width:100%;padding:10px}