* {
            margin: 0 ;
            padding: 0;
            box-sizing: border-box;
        }

        body {
            
            background: linear-gradient(135deg, #f5f7fa, #c3cfe2);
            color: #333;
            min-height: 100vh;
          
        }

        .mediacenter {
            max-width: 1200px;
            margin: 0 auto;
        }

        h1 {
            text-align: center;
            margin-bottom: 40px;
            font-size: 3rem;
            text-shadow: 2px 2px 4px rgba(206, 197, 197, 0.3);
            background: linear-gradient(45deg, #f27120, #ff9d4d);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }

        .main-player {
            background: rgba(255,255,255,0.9);
            backdrop-filter: blur(10px);
            border-radius: 20px;
            padding: 30px;
            margin-bottom: 40px;
            box-shadow: 0 8px 32px rgba(0,0,0,0.1);
            border: 1px solid rgba(255,255,255,0.3);
        }

        .main-video {
            width: 100%;
            border-radius: 15px;
            box-shadow: 0 10px 25px rgba(0,0,0,0.3);
            margin-bottom: 20px;
        }

        .video-info {
            text-align: center;
        }

        .video-title {
            font-size: 1.8rem;
            margin-bottom: 10px;
            color: #f8a056;
        }

        .video-description {
            font-size: 1.1rem;
            opacity: 0.8;
            line-height: 1.6;
        }

        .playlist {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
            gap: 25px;
            margin-top: 40px;
        }

        .video-card {
            background: rgba(255,255,255,0.9);
            backdrop-filter: blur(10px);
            border-radius: 15px;
            padding: 20px;
            transition: all 0.3s ease;
            cursor: pointer;
            border: 1px solid rgba(255,255,255,0.3);
            position: relative;
            overflow: hidden;
            box-shadow: 0 4px 15px rgba(0,0,0,0.1);
        }

        .video-card::before {
            content: '';
            position: absolute;
            top: 0;
            left: -100%;
            width: 100%;
            height: 100%;
            background: linear-gradient(90deg, transparent, rgba(255,255,255,0.2), transparent);
            transition: left 0.5s;
        }

        .video-card:hover::before {
            left: 100%;
        }

        .video-card:hover {
            transform: translateY(-10px);
            box-shadow: 0 15px 35px rgba(0,0,0,0.2);
            background: rgba(255,255,255,1);
        }

        .card-video {
            width: 100%;
            height: 200px;
            object-fit: cover;
            border-radius: 10px;
            margin-bottom: 15px;
            transition: transform 0.3s ease;
        }

        .video-card:hover .card-video {
            transform: scale(1.05);
        }

        .card-title {
            font-size: 1rem;
            margin-bottom: 8px;
            color: #f8a056;
        }

        .card-description {
            font-size: 0.9rem;
            opacity: 0.7;
            line-height: 1.4;
        }

        .play-button {
            position: absolute;
            top: 50%;
            left: 50%;
            transform: translate(-50%, -50%);
           background-color: transparent !important; /* 移除绿色背景 */
            border: none;
            border-radius: 50%;
            width: 60px;
            height: 60px;
            font-size: 24px;
            color: white;
            cursor: pointer;
            transition: all 0.3s ease;
            opacity: 0;
            pointer-events: none;
        }

        .video-card:hover .play-button {
            opacity: 1;
            pointer-events: all;
        }

        .play-button:hover {
            background-color: transparent !important; /* 移除绿色背景 */
            transform: translate(-50%, -50%) scale(1.1);
        }

        .controls {
            display: flex;
            justify-content: center;
            gap: 15px;
            margin-top: 20px;
            flex-wrap: wrap;
        }

        .control-btn {
            background: linear-gradient(45deg, #f27120, #ff9d4d);
            border: none;
            padding: 12px 24px;
            border-radius: 25px;
            color: white;
            cursor: pointer;
            font-size: 14px;
            font-weight: 500;
            transition: all 0.3s ease;
            box-shadow: 0 4px 15px rgba(0,0,0,0.2);
        }

        .control-btn:hover {
            transform: translateY(-2px);
            box-shadow: 0 6px 20px rgba(0,0,0,0.3);
            background: linear-gradient(45deg, #ff9d4d, #f27120);
        }

        .volume-control {
            display: flex;
            align-items: center;
            gap: 10px;
            background: rgba(255,255,255,0.9);
            padding: 10px 20px;
            border-radius: 25px;
            backdrop-filter: blur(10px);
            box-shadow: 0 2px 10px rgba(0,0,0,0.1);
        }

        .volume-slider {
            width: 100px;
            height: 5px;
            background: rgba(0,0,0,0.2);
            border-radius: 5px;
            outline: none;
            cursor: pointer;
        }

        @media (max-width: 768px) {
            h1 {
                font-size: 2rem;
            }
            
            .playlist {
                grid-template-columns: 1fr;
            }
            
            .main-player {
                padding: 20px;
            }
            
            .controls {
                gap: 10px;
            }
            
            .control-btn {
                padding: 10px 20px;
                font-size: 12px;
            }
        }

        .footer {
            text-align: center;
            margin-top: 60px;
            padding: 30px;
            background: rgba(255,255,255,0.8);
            border-radius: 15px;
            opacity: 0.8;
            color: #666;
        }