/* 全局样式重置与基础设置 */
        * {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
            font-family: Arial, sans-serif;
        }

        body {
            background-color: #f8f9fc;
            padding: 40px;
        }

        /* 标题区域样式 */
        .header-section {
            text-align: center;
            margin-bottom: 30px;
        }

        .core-competence {
            color: #0071bc;
            font-size: 14px;
            font-weight: 600;
            letter-spacing: 1px;
            margin-bottom: 8px;
        }

        .main-title {
            font-size: 32px;
            font-weight: 700;
            color: #1a1a1a;
            margin-bottom: 12px;
        }

        .subtitle {
            font-size: 16px;
            color: #666;
            line-height: 1.5;
            max-width: 800px;
            margin: 0 auto;
        }

        /* 表格样式 - 完全匹配原图 */
        .materials-table {
            width: 90%;
            margin: 0 auto;
            border-collapse: collapse;
            box-shadow: 0 1px 3px rgba(0,0,0,0.1);
        }

        /* 表头样式 */
        .materials-table thead th {
            background-color: #003399;
            color: white;
            padding: 12px 15px;
            text-align: left;
            font-size: 14px;
            font-weight: 600;
        }

        /* 表格内容行样式 */
        .materials-table tbody td {
            padding: 12px 15px;
            font-size: 14px;
            color: #333;
            border-bottom: 1px solid #f0f0f0;
            background-color: white;
        }

        /* 数值颜色（DK/DF值） */
        .value-blue {
            color: #0071bc;
        }

        /* 奇偶行区分（和原图视觉一致） */
        .materials-table tbody tr:nth-child(even) td {
            background-color: #f9f9f9;
        }