:root {
        --primary-orange: #ff6b00; /* 安全橙，用于强调 */
        --primary-dark: #2c3e50;    /* 深蓝灰，用于文字 */
        --success-green: #27ae60;   /* 绿色，用于Ergo优势 */
        --bg-light: #f4f6f8;
        --border-color: #e0e0e0;
    }

    body {
        font-family: 'Segoe UI', Roboto, Helvetica, Arial, sans-serif;
        color: var(--primary-dark);
        line-height: 1.6;
        margin: 0;
        padding: 20px;
        background-color: #fff;
    }

    .container {
        max-width: 1100px;
        margin: 0 auto;
    }

    /* --- 头部区域 --- */
    .product-header {
        border-bottom: 3px solid var(--primary-orange);
        padding-bottom: 20px;
        margin-bottom: 30px;
    }

    .product-header h1 {
        margin: 0 0 10px 0;
        font-size: 32px;
        color: var(--primary-dark);
    }
    
    .product-header .sub-text {
        font-size: 18px;
        color: #555;
        max-width: 800px;
    }

    /* --- 技术贴士框 (LC vs MBS) --- */
    .tech-note {
        background-color: #fff3e0; /* 浅橙色背景 */
        border-left: 5px solid var(--primary-orange);
        padding: 15px 20px;
        margin-bottom: 40px;
        border-radius: 4px;
        font-size: 15px;
    }

    .tech-note strong {
        color: #d35400;
    }

    /* --- 对比区域 (CSS Grid) --- */
    .comparison-section {
        margin-bottom: 50px;
    }

    .section-title {
        text-align: center;
        margin-bottom: 30px;
        font-size: 24px;
        font-weight: 700;
    }

    .comparison-grid {
        display: grid;
        grid-template-columns: 1fr 1fr;
        gap: 30px;
    }

    /* 卡片样式 */
    .compare-card {
        border: 1px solid var(--border-color);
        border-radius: 8px;
        padding: 25px;
        background: #fff;
        box-shadow: 0 4px 6px rgba(0,0,0,0.05);
    }

    .compare-card.standard {
        background-color: #f9f9f9;
        border-top: 5px solid #95a5a6; /* 灰色顶栏 */
    }

    .compare-card.ergo {
        background-color: #f0fbf4; /* 极浅绿背景 */
        border-top: 5px solid var(--success-green); /* 绿色顶栏 */
        position: relative;
    }

    /* 推荐标签 */
    .compare-card.ergo::after {
        content: "Recommended";
        position: absolute;
        top: -12px;
        right: 20px;
        background: var(--success-green);
        color: #fff;
        padding: 2px 10px;
        font-size: 12px;
        border-radius: 4px;
        font-weight: bold;
    }

    .card-title {
        font-size: 20px;
        margin-top: 0;
        margin-bottom: 20px;
        display: flex;
        align-items: center;
        gap: 10px;
    }

    .comparison-list {
        list-style: none;
        padding: 0;
    }

    .comparison-list li {
        margin-bottom: 15px;
        padding-bottom: 15px;
        border-bottom: 1px dashed #ddd;
    }
    
    .comparison-list li:last-child {
        border-bottom: none;
    }

    .label {
        display: block;
        font-size: 12px;
        text-transform: uppercase;
        color: #888;
        font-weight: bold;
        margin-bottom: 4px;
    }

    .value {
        font-weight: 600;
        font-size: 16px;
    }

    .icon-up { color: #e74c3c; }   /* 红色向上箭头 */
    .icon-down { color: var(--success-green); } /* 绿色向下箭头 */

    /* --- 产品选型表格 --- */
    .table-container {
        overflow-x: auto;
        border: 1px solid var(--border-color);
        border-radius: 8px;
        box-shadow: 0 0 10px rgba(0,0,0,0.05);
    }

    table {
        width: 100%;
        border-collapse: collapse;
        min-width: 800px; /* 防止手机端过度挤压 */
    }

    th {
        background-color: var(--primary-dark);
        color: #fff;
        padding: 12px;
        text-align: center;
        font-weight: 500;
    }

    td {
        padding: 10px;
        border-bottom: 1px solid var(--border-color);
        text-align: center;
        vertical-align: middle;
        font-size: 14px;
    }

    /* 表格中的图片优化 */
    .hook-img {
        width: 60px;
        height: 60px;
        object-fit: cover;
        border: 1px solid #ddd;
        border-radius: 4px;
        padding: 2px;
        background: #fff;
    }

    tr:nth-child(even) { background-color: #f8f9fa; }
    tr:hover { background-color: #eef2f5; }

    /* --- 移动端适配 --- */
    @media (max-width: 768px) {
        .comparison-grid {
            grid-template-columns: 1fr; /* 堆叠显示 */
        }
        
        .product-header h1 { font-size: 26px; }
    }