/* 面包屑导航 */
.breadcrumb {
    padding: 20px 0;
    border-bottom: 1px solid #e0e0e0;
    background-color: #fff;
}

.breadcrumb a {
    color: #666;
    text-decoration: none;
}

.breadcrumb a:hover {
    color: #d0021b;
}

.breadcrumb .current {
    color: #d0021b;
}

/* 产品详情页布局 */
.product-detail {
    padding: 40px 0;
    background-color: #fff;
    min-height: 600px;
}

.product-layout {
    display: flex;
    gap: 30px;
}

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

.sidebar-title {
    background-color: #d0021b;
    color: #fff;
    padding: 15px 20px;
    margin-bottom: 0;
    text-align: center;
}

.sidebar-title h2 {
    font-size: 20px;
    margin: 0;
    text-transform: uppercase;
    font-weight: bold;
    letter-spacing: 1px;
}

.product-menu {
    list-style: none;
    padding: 0;
    margin: 0;
    border: 1px solid #e0e0e0;
    border-top: none;
}

.product-menu li {
    border-bottom: 1px solid #e0e0e0;
}

.product-menu li:last-child {
    border-bottom: none;
}

.product-menu a {
    display: block;
    padding: 15px 20px;
    color: #333;
    text-decoration: none;
    background-color: #f5f5f5;
    transition: all 0.3s;
    font-size: 14px;
    position: relative;
    border-left: 3px solid transparent;
}

.product-menu a:hover {
    background-color: #e8e8e8;
    border-left-color: #d0021b;
    padding-left: 25px;
}

.product-menu a.active {
    background-color: #e8e8e8;
    color: #d0021b;
    font-weight: 600;
    border-left-color: #d0021b;
}

/* 右侧产品内容 */
.product-content {
    flex: 1;
    max-width: 960px;
}

.product-main-image {
    text-align: center;
    margin-bottom: 30px;
}

.product-main-image img {
    max-width: 100%;
    height: auto;
    max-height: 500px;
}

.product-title {
    text-align: center;
    margin-bottom: 20px;
}

.product-title h1 {
    font-size: 28px;
    color: #333;
    font-weight: 400;
}

.inquire-btn {
    text-align: center;
    margin: 30px 0;
}

.inquire-btn a {
    display: inline-block;
    padding: 10px 40px;
    border: 1px solid #d0021b;
    color: #d0021b;
    text-decoration: none;
    border-radius: 5px;
    transition: all 0.3s;
}

.inquire-btn a:hover {
    background-color: #d0021b;
    color: #fff;
}

/* 产品描述切换按钮 */
.product-description-toggle {
    margin: 40px 0 20px;
}

.desc-toggle-btn {
    background-color: #d0021b;
    color: #fff;
    border: none;
    padding: 12px 30px;
    font-size: 14px;
    border-radius: 5px;
    cursor: pointer;
    transition: all 0.3s;
}

.desc-toggle-btn:hover {
    background-color: #b00217;
}

/* 产品描述内容 */
.product-description {
    border-top: 1px solid #ddd;
    padding-top: 20px;
}

.desc-section h3 {
    font-size: 22px;
    color: #333;
    margin-bottom: 20px;
}

.desc-section h4 {
    font-size: 16px;
    color: #333;
    margin: 30px 0 15px;
    font-weight: bold;
}

.desc-section p {
    line-height: 1.8;
    color: #666;
    margin-bottom: 15px;
}

.desc-section ul {
    margin: 15px 0;
    padding-left: 20px;
}

.desc-section li {
    line-height: 1.8;
    color: #666;
    margin-bottom: 10px;
}

.detail-image {
    max-width: 100%;
    height: auto;
    margin: 20px 0;
    display: block;
}

/* 响应式设计 */
@media (max-width: 768px) {
    .product-layout {
        flex-direction: column;
    }

    .product-sidebar {
        width: 100%;
    }

    .product-menu {
        display: flex;
        flex-wrap: wrap;
        gap: 10px;
        border: none;
    }

    .product-menu li {
        border: 1px solid #e0e0e0;
    }

    .product-menu li:last-child {
        border-bottom: 1px solid #e0e0e0;
    }

    .product-title h1 {
        font-size: 24px;
    }
}