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solid var(--border-light);border-radius:4px;padding:5px 8px;font-size:14px;cursor:pointer;margin:0}.fullscreen-speed-select:hover{background:var(--btn-hover)}.fullscreen-speed-select:disabled{opacity:.3;cursor:not-allowed}.fullscreen-left-controls,.fullscreen-right-controls{display:flex;align-items:center;flex-wrap:wrap;gap:10px}.fullscreen-left-controls{justify-content:flex-start;width:100%}.fullscreen-right-controls{justify-content:flex-end;margin-top:5px}.fullscreen-time{color:var(--text-color);font-family:monospace;font-size:14px;cursor:default}:root{--btn-disabled-bg:#d1d9e6;--btn-disabled-color:#888;--accent-color:#3498db;--accent-hover:#2980b9;--text-color:#333;--text-strong:#222;--text-light:#666;--bg-gradient:linear-gradient(135deg,#f5f7fa,#e4e7eb);--container-bg:#ffffff;--container-shadow:0 10px 30px rgba(0,0,0,0.1);--header-bg:linear-gradient(90deg,#eef2f7,#e6e9f0);--border-color:#d1d9e6;--border-light:#e6e9f0;--logo-gradient:linear-gradient(135deg,#3498db,#8e44ad);--btn-bg:#f0f4f8;--btn-hover:#e3eaf3;--btn-gradient:linear-gradient(90deg,#3498db,#8e44ad);--btn-shadow:0 4px 15px rgba(0,0,0,0.1);--btn-hover-shadow:0 6px 20px rgba(0,0,0,0.15);--panel-bg:rgba(240,244,248,0.9);--panel-shadow:0 5px 15px rgba(0,0,0,0.05);--playlist-bg:rgba(227,234,243,0.5);--item-hover:rgba(52,152,219,0.1);--item-active:rgba(52,152,219,0.15);--thumb-bg:#f0f4f8;--thumb-icon:#aab7c4;--delete-bg:rgba(231,76,60,0.3);--delete-hover:rgba(231,76,60,0.6);--video-bg:#f0f2f5;--upload-bg:rgba(255,255,255,0.95);--drag-overlay:rgba(52,152,219,0.15);--tooltip-bg:rgba(0,0,0,0.7);--footer-bg:#f0f4f8;--shortcut-bg:rgba(227,234,243,0.7);--slider-bg:#d1d9e6;--fullscreen-btn:rgba(0,0,0,0.3);--fullscreen-btn-hover:rgba(0,0,0,0.4);--controls-bg:rgba(255,255,255,0.85);--delete-bg-default:var(--logo-gradient);--delete-icon-color:#fff;--delete-icon-hover-color:#fff;--delete-bg-hover:linear-gradient(135deg,#e74c3c,#c0392b);--card-bg:rgba(255,255,255,0.8);--text-normal:#555;--tips-bg:rgba(227,234,243,0.4);--support-bg:rgba(240,244,248,0.5);--btn-shadow-hover:0 6px 20px rgba(52,152,219,0.3)}.dark-theme{--btn-disabled-bg:#3a3f45;--btn-disabled-color:#6c757d;--accent-color:#3498db;--accent-hover:#2980b9;--text-color:#e6e6e6;--text-strong:#ffffff;--text-light:#b3b3cc;--bg-gradient:linear-gradient(135deg,#0a0a12,#1a1a2e);--container-bg:#0f0f1b;--container-shadow:0 15px 35px rgba(0,0,0,0.5);--header-bg:linear-gradient(90deg,#222233,#1a1a2e);--border-color:#33334d;--border-light:#33334d;--logo-gradient:linear-gradient(135deg,#3498db,#8e44ad);--btn-bg:#222233;--btn-hover:#2c2c44;--btn-disabled-bg:#33334d;--btn-disabled-color:#888899;--btn-gradient:linear-gradient(90deg,#3498db,#8e44ad);--btn-shadow:0 4px 15px rgba(0,0,0,0.2);--btn-hover-shadow:0 6px 20px rgba(0,0,0,0.3);--panel-bg:rgba(15,15,27,0.9);--panel-shadow:0 5px 15px rgba(0,0,0,0.3);--playlist-bg:rgba(26,26,46,0.5);--item-hover:rgba(52,152,219,0.15);--item-active:rgba(52,152,219,0.25);--thumb-bg:#222;--thumb-icon:#555;--delete-bg:rgba(255,0,0,0.3);--delete-hover:rgba(255,0,0,0.6);--video-bg:#000;--upload-bg:rgba(10,10,18,0.95);--drag-overlay:rgba(52,152,219,0.2);--tooltip-bg:rgba(0,0,0,0.7);--footer-bg:#0a0a12;--shortcut-bg:rgba(26,26,46,0.7);--slider-bg:#33334d;--fullscreen-btn:rgba(0,0,0,0.5);--fullscreen-btn-hover:rgba(0,0,0,0.8);--controls-bg:rgba(15,15,27,0.7);--delete-bg-default:var(--logo-gradient);--delete-icon-color:#fff;--delete-icon-hover-color:#fff;--delete-bg-hover:linear-gradient(135deg,#e74c3c,#c0392b);--card-bg:rgba(15,15,27,0.8);--text-normal:#b3b3cc;--tips-bg:rgba(34,34,51,0.4);--support-bg:rgba(26,26,46,0.5);--btn-shadow-hover:0 6px 20px rgba(52,152,219,0.4)}@media (max-width:1200px){.player-body{flex-direction:column;gap:20px;max-height:none}.main-content{flex:none;width:100%;height:auto}.video-container{max-height:70vh;min-height:300px}}@media (max-width:768px){.progress-container{flex-direction:column;align-items:flex-start}.upload-text{font-size:1.4rem}.empty-state-guide{padding:15px;gap:20px}.guide-title{font-size:1.5rem}.guide-subtitle{font-size:1rem}.guide-steps,.guide-support,.guide-tips{padding:16px}.steps-title,.tips-title{font-size:1.2rem}.support-title{font-size:1.1rem}.step-description,.support-description,.tip-item{font-size:.9rem}.primary-btn{padding:12px 30px;font-size:1rem}.player-header{flex-direction:column;gap:15px;align-items:flex-start}.header-left{width:100%;justify-content:space-between}.control-buttons,.control-group{justify-content:center}.fullscreen-controls{padding:20px 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12px;-webkit-tap-highlight-color:rgba(52,152,219,.2);text-decoration:none}[role=link],a,input,select,textarea{touch-action:manipulation;border-radius:6px}input,select,textarea{font-size:16px!important}input[type=range]{-webkit-appearance:none;touch-action:manipulation;padding:6px 0!important}input[type=range]::-webkit-slider-thumb{width:24px!important;height:24px!important;-webkit-appearance:none;touch-action:manipulation;border-radius:50%;cursor:pointer}.playlist-item{min-height:60px!important;padding:12px!important;touch-action:manipulation;border-radius:8px;margin-bottom:8px}.delete-btn{min-width:44px!important;min-height:44px!important}.delete-btn,.fullscreen-icon{touch-action:manipulation;border-radius:50%;display:flex;align-items:center;justify-content:center}.fullscreen-icon{width:48px!important;height:48px!important}.volume-container{min-height:44px;align-items:center;gap:12px}.volume-slider{width:100px;min-height:44px}.item-details,.item-title,.upload-hint,.upload-text{-webkit-user-select:none;-moz-user-select:none;user-select:none}.upload-area,.video-container{touch-action:none}.playlist-container{-webkit-overflow-scrolling:touch;scroll-behavior:smooth}.btn-small:active,.btn:active,[role=button]:active,button:active{transform:scale(.95);transition:transform .1s ease}*{touch-action:manipulation}.video-container{min-height:300px!important;border-radius:12px}.player-body{padding:16px;gap:16px}.player-footer{padding:16px 20px;font-size:.9rem}.shortcuts{gap:12px;margin-top:12px}.shortcut-item{padding:8px 16px;font-size:.85rem;border-radius:20px;min-height:36px;display:flex;align-items:center}}[dir=rtl]{direction:rtl}[dir=rtl] .btn,[dir=rtl] .btn-small{direction:rtl;text-align:right;flex-direction:row-reverse}[dir=rtl] .control-buttons,[dir=rtl] .control-group,[dir=rtl] .header-left,[dir=rtl] .header-right,[dir=rtl] .player-header,[dir=rtl] .playlist-actions,[dir=rtl] .playlist-header,[dir=rtl] .playlist-section{flex-direction:row-reverse!important;direction:rtl}[dir=rtl] .btn .fa,[dir=rtl] .btn .far,[dir=rtl] .btn .fas,[dir=rtl] .btn i{margin-left:8px;margin-right:0}[dir=rtl] .item-details,[dir=rtl] .item-details span,[dir=rtl] .item-info,[dir=rtl] .item-title,[dir=rtl] .playlist-actions button,[dir=rtl] .playlist-container,[dir=rtl] .playlist-header h2,[dir=rtl] .playlist-header i,[dir=rtl] .playlist-header span,[dir=rtl] .playlist-item,[dir=rtl] .playlist-section{text-align:right}[dir=rtl] .item-thumb{margin-left:12px;margin-right:0}[dir=rtl] .delete-btn{right:auto;left:8px}[dir=rtl] .empty-playlist{text-align:right;align-items:flex-end}[dir=rtl] .player-footer{text-align:right}[dir=rtl] .shortcuts{flex-direction:row-reverse}[dir=ltr] .player-footer{text-align:center}[dir=ltr] .shortcuts{flex-direction:row;justify-content:center}[dir=rtl] .ctrl-btn .tooltip{left:auto;right:50%;transform:translateX(50%)}@media (prefers-reduced-motion:no-preference){html{scroll-behavior:smooth}}.optimized-image{transition:opacity .3s ease-in-out}.optimized-image.loading{opacity:.7}.optimized-image.loaded{opacity:1}.optimized-image-error{display:flex;align-items:center;justify-content:center;background-color:#f0f0f0;color:#666;font-size:12px;border:1px solid #ddd;border-radius:4px}.dark-theme .optimized-image-error{background-color:#2a2a2a;color:#999;border-color:#444}.preloading{animation:pulse 1.5s ease-in-out infinite}@keyframes pulse{0%{opacity:.6}50%{opacity:1}to{opacity:.6}}@media (prefers-reduced-motion:reduce){.optimized-image,.preloading{animation:none;transition:none}}@media (max-width:480px){.container{margin:0;border-radius:0}.player-body{padding:12px;gap:12px}.video-container{min-height:250px!important;border-radius:8px}.upload-text{font-size:1.2rem}.upload-hint{font-size:1rem}.btn{padding:14px 20px!important;font-size:16px!important;min-height:48px!important}.btn-small{padding:12px 16px!important;font-size:14px!important;min-height:44px!important}}@media (orientation:landscape) and (max-height:500px){.player-header{padding:8px 20px!important}.player-footer{padding:8px 25px!important}.video-container{min-height:200px!important}.player-body{padding:12px 20px}}@media (orientation:portrait) and 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