@charset "utf-8";
        body {
            font-family: Arial, sans-serif;
            margin: 0;
            padding: 0;
            display: flex;
            flex-direction: column;
            height: 100vh;
        }
        .row100{
        	width: 100%;
        }
        .row{
        	width: 100%;
        	max-width: 1440px;
        	margin:auto;
        }

        .container {
            display: flex;
            /*flex-direction: row;*/
            flex: 1;
        }

        .video-player {
            flex: 4;
            padding: 0px;
            box-sizing: border-box;
            background-color: #000;
            align-content:center;
        }

        .playlist {
            flex: 1;
            padding: 0px;
            box-sizing: border-box;
            background-color: #f3f3f3;
        }

        .video-title {
            font-size: 16px;
            margin-bottom: 10px;
            color: #fff; 
            padding-left: 20px;
            overflow: hidden;
            height: 24px;
        }

        .video-description {
        	padding: 20px;

        }

        .tabs {
            display: flex;
            border-bottom:  1px solid #ccc;
            background-color: #e9e8e8;
            display: none;
        }

        .tab {
            padding: 10px 20px;
            border: none;
            flex: 0;
            background: transparent;
            outline: none;
            position: relative;
            cursor:pointer;
            transition: color 0.3s;
        }

        .tab.active {
            color: blue;
            font-weight: bold;
        }

        .tab.active::after {
            content: '';
            position: absolute;
            left: 0;
            right: 0;
            bottom: -2px;
            height: 2px;
            background-color: blue; /* 激活状态下的下划线颜色 */
        }

        .content {
            /*margin-top: 20px;*/
            /*padding: 10px;*/
            border: 0px solid #ccc;
        }

        .tab-content {
            /*display: none;*/
        }

        .tab-content.active {
            display: block;
        }

		.top {
			background-color: #7B7B7B;
			line-height: 50px;
			height: 50px;
		}
		.top_left {
			color: #FFF;
			font-family: Arial, Helvetica, sans-serif;
			font-size: 22px;
			font-weight: 800;
			float: left;
			padding-left: 10px;
		}
       #playerlist {
            width: 100%;
            overflow: auto;
            display: inline;
            margin:0;
            max-height: 600px;
            padding: 0px;
            float: left;
            font-size: 14px;
            box-sizing: border-box;			
        }

		#playerlist li {
			list-style: none;				
			line-height: 15px;
			font-size: 14px;
			padding-top: 15px;
			/*background-color: #fff;*/
			padding-bottom: 15px;
			border-bottom: 1px solid #efdada;	
			/*overflow: hidden;*/
			padding-left: 10px;
			cursor:pointer;
		}
		#playerlist .jiedian{			
			background-color: #e6dbdb;
			border-top: 1px solid #7b7b7b;			
		}

		#playerlist li:last-child {
			border-bottom: none;
		}

		#playerlist li.active {
			background: #f2eefe;
		}

		#playerlist li.active a {
		   color: #FF7900;
		}

		#playerlist li a {
			display: block;
			color: #fff;
		}

		#playerlist li img {
			vertical-align: middle;
			height: 14px;
			margin: 0 5px 0 0;
		}


        /* Responsive Styles */
        @media (max-width: 768px) {
            .container {
                flex-direction: column;
            }
            .video-player, .playlist,.tabs {
                flex: none;
            }
            .playlist ,.top,.tab-content,.jianyi{
                display:  none;
            }
            .tabs{display: block;}
            #playerlist {
            	max-height: none;
            }
            .video-player{position: sticky;top:0;z-index: 10000;}
        }