   <style>
        * {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
            font-family: 'Segoe UI', 'Microsoft YaHei', sans-serif;
        }
        
        body {
            background: linear-gradient(135deg, #1a1a2e 0%, #16213e 100%);
            color: #f1f1f1;
            min-height: 100vh;
            padding: 20px;
            display: flex;
            flex-direction: column;
            align-items: center;
        }
        
        .container {
            width: 100%;
            max-width: 1200px;
            display: flex;
            flex-direction: column;
            gap: 25px;
        }
        
        header {
            text-align: center;
            padding: 20px 0;
            width: 100%;
        }
        
        h1 {
            font-size: 2.8rem;
            margin-bottom: 8px;
            background: linear-gradient(90deg, #4cc9f0, #4361ee);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            text-shadow: 0 2px 10px rgba(76, 201, 240, 0.2);
        }
        
        .subtitle {
            color: #a5b4fc;
            font-size: 1.1rem;
            margin-bottom: 10px;
        }
        
        .player-container {
            display: flex;
            flex-wrap: wrap;
            gap: 25px;
            background: rgba(30, 30, 46, 0.7);
            border-radius: 15px;
            padding: 25px;
            box-shadow: 0 10px 30px rgba(0, 0, 0, 0.3);
            backdrop-filter: blur(10px);
        }
        
        .video-section {
            flex: 3;
            min-width: 300px;
        }
        
        .video-container {
            position: relative;
            width: 100%;
            border-radius: 12px;
            overflow: hidden;
            background: #000;
            box-shadow: 0 8px 25px rgba(0, 0, 0, 0.5);
        }
        
        #videoPlayer {
            width: 100%;
            height: auto;
            display: block;
            max-height: 500px;
        }
        
        .video-controls {
            display: flex;
            align-items: center;
            padding: 15px;
            background: rgba(20, 20, 35, 0.9);
            margin-top: 10px;
            border-radius: 10px;
            gap: 15px;
            flex-wrap: wrap;
        }
        
        .control-btn {
            background: #4361ee;
            border: none;
            color: white;
            width: 45px;
            height: 45px;
            border-radius: 50%;
            cursor: pointer;
            display: flex;
            align-items: center;
            justify-content: center;
            transition: all 0.3s ease;
            font-size: 1.2rem;
        }
        
        .control-btn:hover {
            background: #3a56d4;
            transform: scale(1.05);
        }
        
        .control-btn:active {
            transform: scale(0.95);
        }
        
        .progress-container {
            flex: 1;
            min-width: 200px;
            display: flex;
            align-items: center;
            gap: 10px;
        }
        
        #progressBar {
            flex: 1;
            height: 8px;
            -webkit-appearance: none;
            appearance: none;
            background: rgba(255, 255, 255, 0.1);
            border-radius: 4px;
            outline: none;
        }
        
        #progressBar::-webkit-slider-thumb {
            -webkit-appearance: none;
            appearance: none;
            width: 18px;
            height: 18px;
            border-radius: 50%;
            background: #4361ee;
            cursor: pointer;
            border: 2px solid white;
        }
        
        .time-display {
            font-size: 0.9rem;
            color: #a5b4fc;
            min-width: 100px;
        }
        
        .volume-container {
            display: flex;
            align-items: center;
            gap: 10px;
        }
        
        #volumeSlider {
            width: 80px;
            height: 6px;
            -webkit-appearance: none;
            appearance: none;
            background: rgba(255, 255, 255, 0.1);
            border-radius: 3px;
            outline: none;
        }
        
        #volumeSlider::-webkit-slider-thumb {
            -webkit-appearance: none;
            appearance: none;
            width: 15px;
            height: 15px;
            border-radius: 50%;
            background: #4cc9f0;
            cursor: pointer;
        }
        
        .playlist-section {
            flex: 1;
            min-width: 280px;
            background: rgba(25, 25, 40, 0.8);
            border-radius: 12px;
            padding: 20px;
            box-shadow: 0 8px 20px rgba(0, 0, 0, 0.3);
            display: flex;
            flex-direction: column;
        }
        
        .playlist-header {
            display: flex;
            justify-content: space-between;
            align-items: center;
            margin-bottom: 20px;
            padding-bottom: 15px;
            border-bottom: 1px solid rgba(255, 255, 255, 0.1);
        }
        
        .playlist-header h2 {
            font-size: 1.6rem;
            color: #a5b4fc;
        }
        
        .playlist-count {
            background: #4361ee;
            color: white;
            padding: 4px 12px;
            border-radius: 20px;
            font-size: 0.9rem;
        }
        
        .playlist {
            list-style: none;
            overflow-y: auto;
            flex: 1;
            max-height: 450px;
            padding-right: 5px;
        }
        
        .playlist::-webkit-scrollbar {
            width: 6px;
        }
        
        .playlist::-webkit-scrollbar-track {
            background: rgba(255, 255, 255, 0.05);
            border-radius: 10px;
        }
        
        .playlist::-webkit-scrollbar-thumb {
            background: #4361ee;
            border-radius: 10px;
        }
        
        .playlist-item {
            display: flex;
            align-items: center;
            padding: 15px;
            margin-bottom: 10px;
            background: rgba(255, 255, 255, 0.05);
            border-radius: 10px;
            cursor: pointer;
            transition: all 0.3s ease;
            border-left: 4px solid transparent;
        }
        
        .playlist-item:hover {
            background: rgba(255, 255, 255, 0.1);
            transform: translateX(5px);
        }
        
        .playlist-item.active {
            background: rgba(67, 97, 238, 0.2);
            border-left-color: #4361ee;
        }
        
        .playlist-item .play-icon {
            margin-right: 15px;
            color: #a5b4fc;
            font-size: 1.2rem;
        }
        
        .video-info {
            flex: 1;
        }
        
        .video-title {
            font-weight: 600;
            margin-bottom: 5px;
            font-size: 1.05rem;
        }
        
        .video-duration {
            font-size: 0.85rem;
            color: #8a9bff;
        }
        
        .current-playing {
            margin-top: 20px;
            padding: 15px;
            background: rgba(67, 97, 238, 0.1);
            border-radius: 10px;
            border-left: 4px solid #4361ee;
        }
        
        .current-playing h3 {
            font-size: 1.1rem;
            margin-bottom: 8px;
            color: #a5b4fc;
        }
        
        #currentVideoTitle {
            font-weight: 600;
            font-size: 1.2rem;
            color: white;
        }
        
        .instructions {
            background: rgba(30, 30, 46, 0.7);
            border-radius: 10px;
            padding: 20px;
            margin-top: 20px;
            font-size: 0.95rem;
            line-height: 1.6;
            color: #b0b8d8;
        }
        
        .instructions h3 {
            color: #a5b4fc;
            margin-bottom: 10px;
            font-size: 1.2rem;
        }
        
        .instructions ul {
            padding-left: 20px;
        }
        
        .instructions li {
            margin-bottom: 8px;
        }
        
        footer {
            text-align: center;
            margin-top: 30px;
            padding: 20px;
            color: #8a9bff;
            font-size: 0.9rem;
            width: 100%;
            border-top: 1px solid rgba(255, 255, 255, 0.05);
        }
        
        @media (max-width: 768px) {
            .player-container {
                flex-direction: column;
            }
            
            h1 {
                font-size: 2.2rem;
            }
            
            .video-controls {
                justify-content: center;
            }
            
            .progress-container {
                min-width: 100%;
                order: 3;
                margin-top: 10px;
            }
        }
    </style>