:root {
        --biz-navy: #1e293b;
        --biz-green: #10b981;
        --biz-accent: #3b82f6;
        --biz-bg: #f8fafc;
        --biz-border: #e2e8f0;
        --biz-text: #334155;
    }

    .biz-article {
        font-family: Arial, sans-serif;
        line-height: 1.7;
        color: var(--biz-text);
        max-width: 1920px;
        margin: 0 auto;
        background: #ffffff;
    }

    h1 { font-size: 2.3rem; color: var(--biz-navy); text-align: center; margin: 50px 0; line-height: 1.3; border-bottom: 2px solid var(--biz-border); padding-bottom: 30px; }
    h2 { font-size: 1.8rem; color: var(--biz-navy); margin-top: 50px; padding-left: 15px; border-left: 6px solid var(--biz-accent); }
    h3 { font-size: 1.4rem; color: var(--biz-accent); margin-top: 35px; border-bottom: 1px solid var(--biz-border); padding-bottom: 10px; }

    /* 全局段落保持对齐，但会排除掉卡片内部 */
    p { margin-bottom: 20px; text-align: left; } /* 修改为左对齐防止窄屏间距过大 */

    /* 价格卡片布局优化 */
    .pricing-grid {
        display: grid;
        grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
        gap: 20px;
        margin: 30px 0;
    }

    .pricing-card {
        padding: 25px;
        border: 1px solid var(--biz-border);
        border-radius: 8px;
        background: var(--biz-bg);
        transition: transform 0.3s ease;
        text-align: left; /* 强制左对齐，修复间距问题 */
    }

    .pricing-card p {
        text-align: left; /* 确保内部段落也不继承两端对齐 */
        margin-bottom: 10px;
        font-size: 0.95rem;
    }

    .pricing-card:hover { transform: translateY(-5px); border-color: var(--biz-accent); }
    .pricing-card.factory { border: 2px solid var(--biz-green); background: #f0fdf4; }
    
    .tier-label { font-size: 0.8rem; font-weight: bold; color: #64748b; text-transform: uppercase; letter-spacing: 1px; }
    .tier-price { font-size: 1.6rem; font-weight: bold; color: var(--biz-navy); display: block; margin: 10px 0; }

    /* ROI 数据区 */
    .roi-box {
        background: var(--biz-navy);
        color: #ffffff;
        padding: 40px;
        border-radius: 12px;
        margin: 40px 0;
        display: flex;
        flex-wrap: wrap;
        gap: 30px;
        justify-content: space-around;
        text-align: center;
    }

    .stat-item span { display: block; }
    .stat-val { font-size: 2rem; font-weight: bold; color: var(--biz-green); }
    .stat-desc { font-size: 0.9rem; color: #cbd5e1; }

    .info-graphic { margin: 40px 0; text-align: center; background: #f1f5f9; padding: 30px; border-radius: 8px; }
    .info-graphic img { max-width: 100%; height: auto; border-radius: 4px; }
    .caption { font-size: 0.85rem; color: #64748b; margin-top: 15px; font-style: italic; }

    /* Author Box */
    .author-section {
        margin-top: 80px;
        padding: 30px;
        background: var(--biz-bg);
        border: 1px solid var(--biz-border);
        display: flex;
        align-items: center;
        gap: 20px;
        border-radius: 4px;
    }

    .author-meta { font-size: 0.9rem; }
    .author-name { font-weight: bold; font-size: 1.1rem; color: var(--biz-navy); }

    /* CTA Section */
    .cta-container { text-align: center; padding: 60px 20px; }
    .btn-cta {
        background: var(--biz-green);
        color: #ffffff;
        padding: 18px 50px;
        text-decoration: none;
        font-size: 1.2rem;
        font-weight: bold;
        border-radius: 50px;
        display: inline-block;
        transition: all 0.3s;
        box-shadow: 0 4px 14px 0 rgba(16, 185, 129, 0.3);
    }
    .btn-cta:hover { background: #059669; transform: translateY(-2px); }

    @media (max-width: 768px) { h1 { font-size: 1.8rem; } }