/* 面包屑导航 */
.breadcrumb {
    background-color: var(--light-bg);
    padding: 1.5rem 0;
    border-bottom: 1px solid var(--border-color);
}

.breadcrumb .container {
    display: flex;
    align-items: center;
    flex-wrap: wrap;
    font-size: 0.9rem;
}

.breadcrumb a {
    color: var(--light-text);
    text-decoration: none;
    transition: color 0.3s;
}

.breadcrumb a:hover {
    color: var(--primary-color);
}

.breadcrumb .separator {
    margin: 0 0.5rem;
    color: var(--border-color);
}

.breadcrumb .current {
    color: var(--primary-color);
    font-weight: 500;
}

/* 产品详情页 */
.product-detail {
    padding: 4rem 0;
}

.product-detail-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 3rem;
    margin-bottom: 3rem;
}

/* 产品图片区域 */
.product-images {
    position: sticky;
    top: 100px;
}

.main-image {
    background: white;
    border-radius: 16px;
    box-shadow: var(--shadow);
    margin-bottom: 1rem;
    aspect-ratio: 1;
    display: flex;
    align-items: center;
    justify-content: center;
    overflow: hidden;
}

.image-placeholder {
    text-align: center;
    color: var(--light-text);
}

.product-icon-large {
    font-size: 120px;
    display: block;
    margin-bottom: 1rem;
}

.thumbnail-list {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 0.5rem;
}

.thumbnail {
    background: white;
    border: 2px solid var(--border-color);
    border-radius: 8px;
    aspect-ratio: 1;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    transition: all 0.3s;
}

.thumbnail:hover {
    border-color: var(--accent-color);
}

.thumbnail.active {
    border-color: var(--primary-color);
    box-shadow: 0 0 0 2px var(--accent-color);
}

.thumb-icon {
    font-size: 40px;
}

/* 产品信息区域 */
.product-info {
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
}

.product-title {
    font-size: 2.5rem;
    font-weight: 700;
    color: var(--text-color);
    line-height: 1.2;
}

.product-category {
    color: var(--primary-color);
    font-size: 1rem;
    font-weight: 500;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

/* 产品规格网格 */
.product-specs-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 1rem;
}

.spec-card {
    background: var(--light-bg);
    padding: 1.25rem;
    border-radius: 12px;
    border: 1px solid var(--border-color);
}

.spec-label {
    display: block;
    font-size: 0.85rem;
    color: var(--light-text);
    margin-bottom: 0.5rem;
    font-weight: 500;
}

.spec-value {
    display: block;
    font-size: 1.1rem;
    color: var(--text-color);
    font-weight: 600;
}

/* 快速查询 */
.quick-inquiry {
    display: flex;
    gap: 1rem;
    margin-top: 1rem;
}

.btn-large {
    padding: 1rem 2rem;
    font-size: 1.1rem;
}

.btn-secondary {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 1rem 2rem;
    background: transparent;
    color: var(--text-color);
    border: 2px solid var(--border-color);
    border-radius: 8px;
    text-decoration: none;
    font-weight: 600;
    transition: all 0.3s;
}

.btn-secondary:hover {
    border-color: var(--primary-color);
    color: var(--primary-color);
}

/* 产品描述 */
.product-description-section,
.product-applications-section,
.related-products-section {
    margin-bottom: 3rem;
}

.product-description-section h2,
.product-applications-section h2,
.related-products-section h2 {
    font-size: 2rem;
    margin-bottom: 1.5rem;
    color: var(--text-color);
}

.description-content p {
    color: var(--light-text);
    line-height: 1.8;
    font-size: 1.05rem;
}

/* 应用标签 */
.applications-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 1rem;
}

.app-card {
    display: flex;
    align-items: center;
    gap: 1rem;
    background: white;
    padding: 1.25rem;
    border-radius: 12px;
    box-shadow: var(--shadow);
    border: 1px solid var(--border-color);
    transition: transform 0.3s;
}

.app-card:hover {
    transform: translateY(-3px);
    box-shadow: var(--shadow-lg);
}

.app-icon {
    width: 40px;
    height: 40px;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: bold;
    flex-shrink: 0;
}

/* 相关产品 */
.related-products-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(250px, 1fr));
    gap: 1.5rem;
}

.related-product-card {
    display: block;
    background: white;
    padding: 1.5rem;
    border-radius: 12px;
    box-shadow: var(--shadow);
    border: 1px solid var(--border-color);
    text-decoration: none;
    transition: all 0.3s;
}

.related-product-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-lg);
    border-color: var(--primary-color);
}

.related-product-icon {
    font-size: 60px;
    display: block;
    margin-bottom: 1rem;
}

.related-product-card h4 {
    color: var(--text-color);
    font-size: 1.1rem;
    margin-bottom: 0.5rem;
}

.related-product-card p {
    color: var(--light-text);
    font-size: 0.9rem;
}

.no-related {
    color: var(--light-text);
    font-style: italic;
}

/* 询价表单 */
.inquiry-section {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    padding: 4rem 0;
}

.inquiry-section .section-subtitle {
    opacity: 0.9;
}

.inquiry-form-content {
    background: white;
    padding: 2.5rem;
    border-radius: 16px;
    max-width: 800px;
    margin: 0 auto;
    color: var(--text-color);
}

.form-row {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 1.5rem;
    margin-bottom: 1.5rem;
}

.form-group {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.form-group label {
    font-weight: 600;
    color: var(--text-color);
    font-size: 0.9rem;
}

.form-group input,
.form-group textarea {
    padding: 0.875rem;
    border: 2px solid var(--border-color);
    border-radius: 8px;
    font-size: 1rem;
    font-family: inherit;
    transition: border-color 0.3s;
}

.form-group input:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--primary-color);
}

.form-group input[readonly] {
    background-color: var(--light-bg);
}

.form-group.full-width {
    grid-column: 1 / -1;
}

.form-group textarea {
    resize: vertical;
    min-height: 120px;
}

.inquiry-form-content button {
    width: 100%;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    border: none;
}

/* 响应式设计 */
@media (max-width: 968px) {
    .product-detail-content {
        grid-template-columns: 1fr;
    }

    .product-images {
        position: static;
    }

    .product-title {
        font-size: 2rem;
    }

    .form-row {
        grid-template-columns: 1fr;
    }

    .quick-inquiry {
        flex-direction: column;
    }

    .btn-secondary {
        width: 100%;
    }
}

@media (max-width: 640px) {
    .product-detail {
        padding: 2rem 0;
    }

    .product-specs-grid {
        grid-template-columns: 1fr;
    }

    .applications-grid {
        grid-template-columns: 1fr;
    }

    .related-products-grid {
        grid-template-columns: 1fr;
    }

    .inquiry-form-content {
        padding: 1.5rem;
    }

    .product-title {
        font-size: 1.75rem;
    }
}