/* 播放器容器 */
        .player-container {
            position: relative;
            width: 640px;
            height: 360px;
            margin: 50px auto;
            background: #000;
            border-radius: 10px;
            overflow: hidden;
            box-shadow: 0 0 30px rgba(0,0,0,0.3);
        }

        /* 视频元素 */
        #videoElement {
            width: 100%;
            height: 100%;
            object-fit: cover;
        }

        /* 播放按钮 */
        #playButton {
            position: absolute;
            left: 50%;
            top: 50%;
            transform: translate(-50%, -50%);
            width: 80px;
            height: 80px;
            border-radius: 50%;
            background: #4CAF50;
            border: none;
            color: white;
            font-size: 24px;
            cursor: pointer;
            transition: all 0.3s ease;
            z-index: 2;
            opacity: 0.9;
        }

        #playButton:hover {
            background: #45a049;
            transform: translate(-50%, -50%) scale(1.1);
            opacity: 1;
        }

        #playButton::before {
            content: '▶';
            position: relative;
            left: 3px;
        }

        #playButton.playing::before {
            content: '❚❚';
            left: 0;
        }

        /* 进度条相关样式 */
        .progress-container {
            position: absolute;
            bottom: 20px;
            left: 20px;
            right: 20px;
            height: 5px;
            background: rgba(255,255,255,0.2);
            border-radius: 3px;
            cursor: pointer;
            z-index: 3;
        }

        .buffered-progress {
            position: absolute;
            height: 100%;
            background: rgba(255,255,255,0.3);
            border-radius: 3px;
        }

        .current-progress {
            position: absolute;
            height: 100%;
            background: #4CAF50;
            border-radius: 3px;
            width: 0;
            transition: width 0.1s linear;
        }

        .progress-thumb {
            position: absolute;
            width: 12px;
            height: 12px;
            background: #4CAF50;
            border-radius: 50%;
            top: 50%;
            transform: translate(-50%, -50%);
            opacity: 0;
            transition: opacity 0.2s;
        }

        .progress-container:hover .progress-thumb {
            opacity: 1;
        }

        /* 全屏按钮 */
        .fullscreen-btn {
            position: absolute;
            bottom: 30px;
            right: 20px;
            width: 30px;
            height: 30px;
            background: rgba(255,255,255,0.2);
            border: none;
            border-radius: 50%;
            cursor: pointer;
            z-index: 3;
            transition: all 0.3s ease;
        }

        .fullscreen-btn:hover {
            background: rgba(255,255,255,0.3);
        }

        .fullscreen-btn::after {
            content: '⤢';
            color: white;
            font-size: 16px;
            position: absolute;
            left: 50%;
            top: 50%;
            transform: translate(-50%, -50%);
        }

        /* 全屏状态样式 */
        :fullscreen .player-container {
            width: 100vw;
            height: 100vh;
            border-radius: 0;
            max-width: 100%;
        }