/* 产品页面专用样式 */
.page-banner {
    background: linear-gradient(135deg, var(--secondary-dark) 0%, var(--secondary) 100%);
    padding: 48px 0;
    position: relative; overflow: hidden;
}
.page-banner::before {
    content: ''; position: absolute; inset: 0;
    background: url("data:image/svg+xml,%3Csvg width='60' height='60' viewBox='0 0 60 60' xmlns='http://www.w3.org/2000/svg'%3E%3Cg fill='none' fill-rule='evenodd'%3E%3Cg fill='%23ffffff' fill-opacity='0.03'%3E%3Cpath d='M36 34v-4h-2v4h-4v2h4v4h2v-4h4v-2h-4zm0-30V0h-2v4h-4v2h4v4h2V6h4V4h-4zM6 34v-4H4v4H0v2h4v4h2v-4h4v-2H6zM6 4V0H4v4H0v2h4v4h2V6h4V4H6z'/%3E%3C/g%3E%3C/g%3E%3C/svg%3E");
}
.banner-content { position: relative; }
.banner-content h1 { font-size: 2.2rem; font-weight: 800; color: white; margin-bottom: 8px; }
.banner-content p { color: rgba(255,255,255,0.7); font-size: 1rem; margin-bottom: 16px; }
.breadcrumb { display: flex; align-items: center; gap: 8px; font-size: 0.85rem; color: rgba(255,255,255,0.55); }
.breadcrumb a { color: rgba(255,255,255,0.55); }
.breadcrumb a:hover { color: white; }
.breadcrumb i { font-size: 0.65rem; }

.page-title-h1 { font-size: 2.15rem; font-weight: 800; color: var(--text-dark); margin-bottom: 2px; line-height: 1.3; font-family: 'Times New Roman', serif; }

.products-page { padding: 40px 0 80px; background: var(--bg-gray); }
.products-layout { display: grid; grid-template-columns: 280px 1fr; gap: 28px; align-items: start; }

/* Catalog 下载横幅 */
.catalog-banner {
    display: flex; align-items: center; justify-content: space-between; gap: 20px;
    background: linear-gradient(135deg, var(--secondary-dark), var(--secondary));
    border-radius: var(--radius-md);
    padding: 26px 30px; margin-bottom: 24px;
    box-shadow: var(--shadow-sm); position: relative; overflow: hidden;
    content-visibility: visible;
}
.catalog-banner::before {
    content: ''; position: absolute; inset: 0;
    background: url("data:image/svg+xml,%3Csvg width='60' height='60' viewBox='0 0 60 60' xmlns='http://www.w3.org/2000/svg'%3E%3Cg fill='none' fill-rule='evenodd'%3E%3Cg fill='%23ffffff' fill-opacity='0.04'%3E%3Cpath d='M36 34v-4h-2v4h-4v2h4v4h2v-4h4v-2h-4zm0-30V0h-2v4h-4v2h4v4h2V6h4V4h-4zM6 34v-4H4v4H0v2h4v4h2v-4h4v-2H6zM6 4V0H4v4H0v2h4v4h2V6h4V4H6z'/%3E%3C/g%3E%3C/g%3E%3C/svg%3E");
}
.catalog-banner-text { position: relative; flex: 1; }
.catalog-banner-text h1 { font-size: 1.7rem; font-weight: 800; color: white; margin-bottom: 6px; }
.catalog-banner-action { position: relative; display: flex; flex-direction: column; align-items: flex-end; gap: 8px; flex-shrink: 0; }
.btn-catalog-download {
    display: inline-flex; align-items: center; gap: 8px;
    background: #c0392b; color: #fff;
    font-size: 0.92rem; font-weight: 700;
    padding: 12px 24px; border-radius: 999px;
    box-shadow: 0 4px 14px rgba(0,0,0,0.18);
    transition: var(--transition); text-decoration: none;
}
.btn-catalog-download:hover { background: #96281b; transform: translateY(-2px); box-shadow: 0 6px 18px rgba(0,0,0,0.28); }
.btn-catalog-download i { font-size: 1.15rem; }
.btn-catalog-download.disabled { opacity: 0.55; cursor: not-allowed; pointer-events: none; transform: none; background: rgba(255,255,255,0.25); }
.catalog-banner-meta { font-size: 0.72rem; color: rgba(255,255,255,0.55); }

@media (max-width: 640px) {
    .catalog-banner { flex-direction: column; align-items: flex-start; padding: 22px 20px; }
    .catalog-banner-text h1 { font-size: 1.0rem; }
    .catalog-banner-action { align-items: flex-start; }
}

/* 侧边栏 */
.products-sidebar { position: sticky; top: 90px; display: flex; flex-direction: column; gap: 20px; }
.sidebar-card { background: white; border-radius: var(--radius-md); padding: 24px; box-shadow: var(--shadow-sm); border: 1px solid var(--border); }
.sidebar-title { font-size: 0.95rem; font-weight: 700; color: var(--text-dark); margin-bottom: 16px; display: flex; align-items: center; gap: 8px; }
.sidebar-title i { color: var(--primary); }

.category-list { display: flex; flex-direction: column; gap: 2px; }
.cat-item { display: flex; align-items: center; justify-content: space-between; border-radius: var(--radius-sm); transition: var(--transition); }
.cat-item a { flex: 1; padding: 10px 12px; font-size: 0.88rem; color: var(--text-body); display: flex; align-items: center; gap: 8px; }
.cat-item a i { color: var(--text-muted); font-size: 0.85rem; width: 16px; }
.cat-item:hover, .cat-item.active { background: rgba(var(--primary-rgb),0.07); }
.cat-item.active a { color: var(--primary); font-weight: 600; }
.cat-item.active a i { color: var(--primary); }
.cat-count { font-size: 0.75rem; color: var(--text-muted); background: var(--bg-light); padding: 2px 8px; border-radius: 10px; margin-right: 12px; }
.cat-item.active .cat-count { background: rgba(var(--primary-rgb),0.1); color: var(--primary); }

.sidebar-search { display: flex; margin-bottom: 14px; }
.sidebar-search input { flex: 1; padding: 9px 12px; border: 1px solid var(--border); border-right: none; border-radius: var(--radius-sm) 0 0 var(--radius-sm); font-size: 0.85rem; outline: none; font-family: var(--font); }
.sidebar-search input:focus { border-color: var(--primary); }
.sidebar-search button { padding: 9px 14px; background: var(--primary); color: white; border-radius: 0 var(--radius-sm) var(--radius-sm) 0; font-size: 0.85rem; transition: var(--transition); }
.sidebar-search button:hover { background: var(--primary-dark); }

.brand-list { display: flex; flex-direction: column; gap: 4px; }
.brand-list li a { display: block; padding: 7px 12px; font-size: 0.85rem; color: var(--text-body); border-radius: var(--radius-sm); transition: var(--transition); }
.brand-list li a:hover { background: rgba(var(--primary-rgb),0.07); color: var(--primary); padding-left: 16px; }

.cta-sidebar { text-align: center; background: linear-gradient(135deg, var(--secondary-dark), var(--secondary)); color: white; }
.cta-sidebar i { font-size: 2rem; color: var(--accent); margin-bottom: 12px; display: block; }
.cta-sidebar-title { font-size: 0.95rem; font-weight: 700; margin-bottom: 8px; }
.cta-sidebar p { font-size: 0.82rem; opacity: 0.75; margin-bottom: 16px; line-height: 1.6; }
.btn-sidebar-cta { display: block; padding: 10px; background: var(--secondary); color: white; border-radius: var(--radius-sm); font-size: 0.88rem; font-weight: 600; transition: var(--transition); }
.btn-sidebar-cta:hover { background: var(--secondary-dark); }

/* 产品分组 */
.product-group { margin-bottom: 40px; padding: 0; content-visibility: visible; scroll-margin-top: 90px; }
.group-header {
    display: flex; align-items: center; gap: 16px;
    background: white; padding: 20px 24px; border-radius: var(--radius-md) var(--radius-md) 0 0;
    margin-bottom: 0;
}
.group-icon {
    width: 52px; height: 52px; flex-shrink: 0;
    background: linear-gradient(135deg, var(--primary), var(--primary-dark));
    border-radius: 14px; display: flex; align-items: center; justify-content: center;
    font-size: 1.3rem; color: white; overflow: hidden;
}
.group-icon img { max-width: 100%; max-height: 100%; object-fit: contain; }
.group-icon.ac { background: linear-gradient(135deg, #0d6efd, #0dcaf0); }
.group-icon.cooling { background: linear-gradient(135deg, #198754, #20c997); }
.group-icon.hydraulic { background: linear-gradient(135deg, #664d03, #e85d04); }
.group-icon.brake { background: linear-gradient(135deg, #6f42c1, #d63384); }
.group-header h2 { font-size: 1.2rem; font-weight: 800; color: var(--text-dark); margin-bottom: 4px; }
.group-header p { font-size: 0.84rem; color: var(--text-light); }

/* 产品网格 */
.product-grid {
    display: grid; grid-template-columns: repeat(3, 1fr); gap: 0;
    background: white; border-radius: 0 0 var(--radius-md) var(--radius-md);
    overflow: hidden; box-shadow: var(--shadow-sm);
    border: 1px solid var(--border); border-top: none;
}
.prod-card { border-right: 1px solid var(--border); border-bottom: 1px solid var(--border); transition: var(--transition); position: relative; }
.prod-card:hover { background: rgba(var(--primary-rgb),0.02); z-index: 1; box-shadow: var(--shadow-md); transform: scale(1.01); }
.prod-card:nth-child(3n) { border-right: none; }

.prod-img { height: 180px; position: relative; overflow: hidden; border: 1px solid var(--primary); }
.prod-img-inner {
    width: 100%; height: 100%;
    display: flex; flex-direction: column; align-items: center; justify-content: center;
    transition: transform 0.3s ease;
}
.prod-img-inner { background: linear-gradient(135deg, #1a3a6e, #0d2048); }
.prod-img-inner.ac { background: linear-gradient(135deg, #0d2b4a, #1565c0); }
.prod-img-inner.cool { background: linear-gradient(135deg, #0d3b2e, #1b5e20); }
.prod-img-inner.hyd { background: linear-gradient(135deg, #3e1f00, #8b4513); }
.prod-img-inner.brake-img { background: linear-gradient(135deg, #1a0a2e, #4a148c); }
.prod-img-inner i { font-size: 4rem; color: rgba(255,255,255,0.2); }
.prod-card:hover .prod-img-inner { transform: scale(1.05); }

.prod-badge {
    position: absolute; top: 10px; right: 10px;
    font-size: 0.7rem; font-weight: 700; padding: 3px 10px; border-radius: 12px;
}
.prod-badge.hot { background: var(--primary); color: white; }
.prod-badge.new { background: var(--accent); color: white; }

.prod-body { padding: 18px; }
.prod-cat { font-size: 0.72rem; color: var(--primary); font-weight: 600; margin-bottom: 6px; }
.prod-body h3 { font-size: 0.92rem; font-weight: 700; color: var(--text-dark); margin-bottom: 8px; line-height: 1.4; }
.prod-body p { font-size: 0.82rem; color: var(--text-light); line-height: 1.6; margin-bottom: 12px; display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden; }
.prod-specs { display: flex; gap: 6px; flex-wrap: wrap; margin-bottom: 14px; }
.prod-specs span { display: flex; align-items: center; gap: 4px; font-size: 0.72rem; color: var(--text-muted); background: var(--bg-light); padding: 3px 8px; border-radius: 10px; }
.prod-specs i { color: var(--secondary); font-size: 0.68rem; }

.prod-footer { display: flex; align-items: center; justify-content: space-between; }
.prod-oem { font-size: 0.72rem; color: var(--secondary); background: rgba(26,58,110,0.08); padding: 3px 10px; border-radius: 10px; font-weight: 500; }
.prod-quote { font-size: 0.8rem; font-weight: 600; color: var(--primary); display: flex; align-items: center; gap: 4px; }
.prod-quote:hover { color: var(--primary-dark); }

/* CTA条 */
.products-cta-bar {
    background: linear-gradient(135deg, var(--secondary-dark), var(--secondary));
    border-radius: var(--radius-md); padding: 28px 32px;
    margin-top: 12px;
    content-visibility: visible;
}
.cta-bar-content { display: flex; align-items: center; gap: 20px; }
.cta-bar-content i { font-size: 2.5rem; color: var(--accent); flex-shrink: 0; }
.cta-bar-content div { flex: 1; }
.cta-bar-content h2 { font-size: 1.1rem; font-weight: 700; color: white; margin-bottom: 4px; }
.cta-bar-content p { font-size: 0.88rem; color: rgba(255,255,255,0.65); }

@media (max-width: 1100px) {
    .products-layout { grid-template-columns: 1fr; }
    .products-sidebar { position: static; flex-direction: row; flex-wrap: wrap; }
    .sidebar-card { flex: 1; min-width: 220px; }
    .product-grid { grid-template-columns: repeat(3, 1fr); }
}
@media (max-width: 900px) {
    .cta-sidebar { display: none; }
}
@media (max-width: 640px) {
    .product-grid { grid-template-columns: 1fr; }
    .prod-card { border-right: none; }
    .cta-bar-content { flex-wrap: wrap; }
    .prod-badge { display: none; }
    .prod-oem { display: none; }
    .group-icon { display: none; }
    .cat-item a { padding: 10px 12px; display: flex; align-items: center; }
    .prod-quote { display: inline-block; padding: 12px 0; }
}