body {
    font-family: Arial, sans-serif;
    margin: 0;
    padding: 0;
    background-color: #f4f4f4;
    color: #333;
}

.table-container {
    overflow: auto;
    width: 100%;
    position: relative;
    background-color: #fff;
    max-height: 100vh;
    margin: 0;
    padding: 0;
}

/* ========================================================
 * 核心修改：采用 separate 模式绘制边框
 * ========================================================
 */
table {
    width: 100%;
    min-width: 800px;
    table-layout: fixed;
    /* 1. 改变边框模型 */
    border-collapse: separate; 
    /* 2. 移除单元格间距 */
    border-spacing: 0;
    /* 3. 表格负责绘制最外层的上、左边框 */
    border-top: 1px solid #aaa;
    border-left: 1px solid #aaa;
}

th, td {
    /* 4. 单元格只绘制右、下边框 */
    border-right: 1px solid #aaa;
    border-bottom: 1px solid #aaa;
    /* 移除旧的 border 属性 */
    /* border: 1px solid #000; */

    padding: 12px 15px;
    font-size: 16px;
    text-align: center;
    white-space: normal;
    word-break: normal;
    box-sizing: border-box;
    width: 12.5rem;
    min-width: 12.5rem;
    max-width: 12.5rem;
    background-color: #fff;
}
/* ======================================================== */


/* 确保第一列文本左对齐并增加左边距 */
th:first-child,
td:first-child {
    text-align: left;
    padding-left: 20px;
}


/* --- 固定头部 (第一行) --- */
thead th {
    position: sticky;
    top: 0;
    z-index: 2;
    background-color: #fff;
}

/* --- 固定第一列 (包括 thead 和 tbody) --- */
.frozen-column {
    position: sticky;
    left: 0;
    z-index: 1;
    background-color: #E6E6EE;
}

/* --- 固定头部与固定列的交汇处 (左上角单元格) --- */
thead th.frozen-column {
    z-index: 3;
    background-color: #fff;
}

/* --- 其他表格样式 --- */
tbody tr:nth-child(even) {
    background-color: #f2f2f2;
}

tbody tr:hover {
    background-color: #e0e0e0;
}

/* 类别行样式 */
.table-category {
    background-color: #CFCEDF;
    font-weight: bold;
    text-align: center;
}

/* 确保类别行的第一列左对齐 */
.table-category:first-child {
    text-align: left;
}

/* 确保第一行图片自适应单元格宽度 */
.new-header-row img {
    max-width: 100%;
    height: auto;
    display: block;
    margin: 0 auto;
}

/* 响应式调整 */
@media screen and (max-width: 768px) {
    body {
        padding: 0;
    }

    .table-container {
        max-height: 100vh;
    }

    th, td {
        padding: 8px 10px;
        font-size: 14px;
        width: 10rem;
        min-width: 10rem;
        max-width: 10rem;
    }
}

@media screen and (max-width: 480px) {
    th, td {
        padding: 6px 8px;
        font-size: 12px;
        width: 8rem;
        min-width: 8rem;
        max-width: 8rem;
    }
}