/* 视频培训模块 */
/* 基础样式 */
        body {
            font-family: Arial, sans-serif;
            line-height: 1.6;
            color: #333;
            max-width: 1200px;
            margin: 0 auto;
            padding: 20px;
            background-color: #f4f4f4;
        }
        header {
            background-color: #333;
            color: #fff;
            padding: 10px 20px;
            margin-bottom: 20px;
            border-radius: 5px;
        }
        header h1 {
            margin: 0;
            font-size: 24px;
        }
        .container {
            background-color: #fff;
            padding: 20px;
            border-radius: 5px;
            box-shadow: 0 2px 5px rgba(0, 0, 0, 0.1);
        }
		footer {
			margin-top: 20px; 
			text-align: center; 
			color: #777;
		}
        
        /* 按钮样式 */
        .btn {
            display: inline-block;
            padding: 8px 16px;
            background-color: #3388ff;
            color: #fff;
            text-decoration: none;
            border: none;
            border-radius: 4px;
            cursor: pointer;
            transition: background-color 0.3s;
        }
        .btn:hover {
            background-color: #555555;
        }
        .btn-success {
            background-color: #3388ff;
        }
        .btn-success:hover {
            background-color: #338888;
        }
        .btn-danger {
            background-color: #f44336;
        }
        .btn-danger:hover {
            background-color: #da190b;
        }
        
        /* 消息提示样式 */
        .message {
            padding: 15px;
            margin-bottom: 20px;
            border-radius: 4px;
            text-align: center;
        }
        .message.success {
            background-color: #dff0d8;
            color: #3c763d;
            border: 1px solid #d6e9c6;
        }
        .message.error {
            background-color: #f2dede;
            color: #a94442;
            border: 1px solid #ebccd1;
        }
        .message.warning {
            background-color: #fcf8e3;
            color: #8a6d3b;
            border: 1px solid #faebcc;
        }
        .message.info {
            background-color: #d9edf7;
            color: #31708f;
            border: 1px solid #bce8f1;
        }
        
        /* 表格样式 */
        table {
            width: 100%;
            border-collapse: collapse;
            margin-top: 20px;
        }
        table, th, td {
            border: 1px solid #ddd;
        }
        th, td {
            padding: 12px;
            text-align: left;
        }
        th {
            background-color: #f2f2f2;
        }
        tr:nth-child(even) {
            background-color: #f9f9f9;
        }
        
        /* 表单样式 */
        form {
            margin-top: 20px;
        }
        .form-group {
            margin-bottom: 15px;
        }
        label {
            display: block;
            margin-bottom: 5px;
            font-weight: bold;
        }
        input[type="text"],
        input[type="file"],
        textarea {
            width: 100%;
            padding: 8px;
            border: 1px solid #ddd;
            border-radius: 4px;
            box-sizing: border-box;
        }
        textarea {
            height: 100px;
            resize: vertical;
        }
        
        /* 播放器容器 */
        .player-container {
            margin: 20px 0;
            text-align: center;
        }
        
        /* 响应式设计 */
        @media (max-width: 768px) {
            body {
                padding: 10px;
            }
            table, th, td {
                font-size: 14px;
            }
            .btn {
                display: block;
                width: 100%;
                margin-bottom: 10px;
            }
        }