/* 产品二级页面样式 */
.product-detail-hero {
    position: relative;
    height: 500px;
    background: linear-gradient(135deg, #1a1a1a 0%, #2d2d2d 100%);
    display: flex;
    align-items: center;
    overflow: hidden;
}

.product-detail-hero::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-image: url('../images/product/01.png');
    background-position: center;
    background-size: cover;
    opacity: 1;
    z-index: 1;
}

.product-detail-hero .container {
    position: relative;
    z-index: 2;
}

.product-detail-hero h1 {
    font-size: 42px;
    font-weight: 700;
    color: #fff;
    margin: 0;
    display: none;
}

.product-detail-section {
    padding: 80px 0;
    background: #f5f5f5;
}

.product-detail-layout {
    display: flex;
    gap: 40px;
    max-width: 1400px;
    margin: 0 auto;
}

/* 左侧导航 */
.product-sidebar {
    width: 280px;
    flex-shrink: 0;
}

.sidebar-section {
    background: #fff;
    border-radius: 8px;
    overflow: hidden;
    box-shadow: 0 2px 12px rgba(0,0,0,0.08);
    margin-bottom: 20px;
}

.sidebar-section-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 16px 20px;
    cursor: pointer;
    border-bottom: 1px solid #f0f0f0;
    transition: background 0.3s;
    min-height: 56px;
}

.sidebar-section-header:hover {
    background: #fafafa;
}

.sidebar-section-title {
    font-size: 16px;
    font-weight: 700;
    color: #1a1a1a;
    margin: 0;
    position: relative;
    padding-left: 12px;
    line-height: 1.2;
    display: inline-flex;
    align-items: center;
}

.sidebar-section-title::before {
    content: '';
    position: absolute;
    left: 0;
    width: 3px;
    height: 16px;
    background: #e60012;
}

.sidebar-toggle-icon {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    color: #999;
    transition: transform 0.3s;
    flex-shrink: 0;
    width: 20px;
    height: 20px;
    margin-top: -15px;
}

.sidebar-toggle-icon svg {
    display: block;
}

.sidebar-toggle-icon.rotate {
    transform: rotate(180deg);
}

.sidebar-nav-list {
    list-style: none;
    padding: 0;
    margin: 0;
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.3s ease;
}

.sidebar-nav-list.active {
    max-height: 500px;
}

.sidebar-nav-list li {
    margin: 0;
    border-bottom: 1px solid #f5f5f5;
}

.sidebar-nav-list li:last-child {
    border-bottom: none;
}

.sidebar-nav-list li a {
    display: block;
    padding: 14px 20px 14px 35px;
    color: #666;
    text-decoration: none;
    font-size: 14px;
    transition: all 0.3s;
    position: relative;
}

.sidebar-nav-list li a:hover {
    background: #f8f8f8;
    color: #e60012;
}

.sidebar-nav-list li.active a {
    background: #fff5f5;
    color: #e60012;
    font-weight: 500;
}

.sidebar-nav-list li.active a::before {
    content: '';
    position: absolute;
    left: 0;
    top: 0;
    bottom: 0;
    width: 3px;
    background: #e60012;
}

/* 右侧产品展示 */
.product-main-content {
    flex: 1;
    min-width: 0;
}

.product-grid-layout {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 30px;
}

.product-detail-card {
    background: #fff;
    border-radius: 12px;
    overflow: hidden;
    box-shadow: 0 2px 15px rgba(0,0,0,0.08);
    transition: all 0.3s;
}

.product-detail-card:hover {
    transform: translateY(-8px);
    box-shadow: 0 8px 25px rgba(230,0,18,0.15);
}

.product-detail-card-image {
    height: 280px;
    overflow: hidden;
    background: #f5f5f5;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 30px;
}

.product-detail-card-image img {
    max-width: 100%;
    max-height: 100%;
    object-fit: contain;
    transition: transform 0.3s;
}

.product-detail-card:hover .product-detail-card-image img {
    transform: scale(1.05);
}

.product-detail-card-content {
    padding: 30px;
}

.product-detail-card-title {
    font-size: 22px;
    font-weight: 700;
    color: #1a1a1a;
    margin: 0 0 15px 0;
}

.product-detail-card-desc {
    font-size: 14px;
    color: #666;
    line-height: 1.8;
    margin: 0;
}

/* 响应式 */
@media (max-width: 1200px) {
    .product-detail-layout {
        gap: 30px;
    }
    
    .product-sidebar {
        width: 240px;
    }
}

@media (max-width: 992px) {
    .product-detail-layout {
        flex-direction: column;
    }
    
    .product-sidebar {
        width: 100%;
    }
    
    .sidebar-section {
        margin-bottom: 15px;
    }
    
    .sidebar-nav-list.active {
        max-height: 300px;
    }
}

@media (max-width: 768px) {
    .product-detail-hero {
        height: 150px;
    }
    
    .product-detail-hero h1 {
        font-size: 32px;
    }
    
    .product-detail-section {
        padding: 50px 0;
    }
    
    .product-grid-layout {
        grid-template-columns: 1fr;
    }
    
    .product-detail-card-image {
        height: 220px;
    }
}