/**
 * 启扬光学品牌色：黑 #1D1D1D · 红 #B81D22 · 科技灰 #CECECE
 */
:root {
    --brand-black: #1d1d1d;
    --brand-red: #b81d22;
    --brand-red-dark: #9a181c;
    --brand-gray: #cecece;
    --brand-gray-bg: #f5f5f5;
    --brand-text: #333333;
    --brand-text-muted: #666666;
}

.footer .footer-email,
.footer .footer-email a {
    color: var(--brand-red);
}
.footer .footer-email a:hover {
    color: var(--brand-red-dark);
}

/* 列表页分类筛选（产品 / 解决方案 / 服务） */
.list-category-filter,
.product-filter {
    display: flex;
    flex-direction: row;
    flex-wrap: wrap;
    align-items: center;
    gap: 10px;
    margin: 8px 0 32px;
    padding: 18px 20px;
    background: var(--brand-gray-bg);
    border: 1px solid #ebebeb;
    border-radius: 8px;
    box-sizing: border-box;
}
.list-category-filter a,
.product-filter a {
    display: inline-block;
    padding: 9px 20px;
    font-size: 15px;
    line-height: 1.35;
    color: var(--brand-text);
    text-decoration: none;
    background: #ffffff;
    border: 1px solid #e3e3e3;
    border-radius: 999px;
    transition: color 0.2s ease, background 0.2s ease, border-color 0.2s ease, box-shadow 0.2s ease;
}
.list-category-filter a:hover,
.product-filter a:hover {
    color: var(--brand-red);
    border-color: var(--brand-red);
    box-shadow: 0 2px 8px rgba(184, 29, 34, 0.08);
}
.list-category-filter a.on,
.product-filter a.on {
    color: #ffffff;
    background: var(--brand-red);
    border-color: var(--brand-red);
    font-weight: 600;
    box-shadow: 0 4px 12px rgba(184, 29, 34, 0.22);
}
.list-section-title,
.product-section-title {
    font-size: 22px;
    margin: 0 0 24px;
    font-weight: 600;
    color: var(--brand-black);
    letter-spacing: 0.02em;
}