/* ========== 产品详情页专属样式 ========== */

/* 面包屑 */
.breadcrumb {
    padding: 16px 0 0;
    font-size: 14px;
    color: var(--color-gray-text);
    background: var(--color-white);
}

.breadcrumb a {
    color: var(--color-gray-text);
    transition: color 0.2s;
}

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

.breadcrumb .sep {
    margin: 0 8px;
    color: var(--color-border);
}

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

/* 产品详情主区域 */
.product-detail {
    padding: 40px 0 60px;
    background: var(--color-white);
}

.product-detail-inner {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 60px;
    align-items: start;
}

/* 图片区 */
.product-gallery {
    position: sticky;
    top: 100px;
}

.main-image {
    border-radius: 16px;
    overflow: hidden;
    background: var(--color-gray-bg);
    aspect-ratio: 1/1;
    display: flex;
    align-items: center;
    justify-content: center;
}

.main-image img {
    width: 100%;
    height: 100%;
    object-fit: contain;
}

.thumbnails {
    display: flex;
    gap: 12px;
    margin-top: 16px;
}

.thumbnails img {
    width: 72px;
    height: 72px;
    border-radius: 8px;
    object-fit: cover;
    cursor: pointer;
    border: 2px solid transparent;
    transition: border-color 0.2s;
    background: var(--color-gray-bg);
}

.thumbnails img:hover {
    border-color: var(--color-blue);
}

.thumbnails img.active {
    border-color: var(--color-blue);
}

/* 产品信息区 */
.product-breadcrumb-tags {
    margin-bottom: 8px;
}

.tag {
    display: inline-block;
    padding: 2px 12px;
    font-size: 12px;
    font-weight: 500;
    color: var(--color-blue);
    background: rgba(0, 122, 255, 0.1);
    border-radius: 20px;
}

.product-title {
    font-size: 32px;
    font-weight: 700;
    letter-spacing: -0.02em;
    margin-bottom: 4px;
}

.product-model {
    font-size: 15px;
    color: var(--color-gray-text);
    margin-bottom: 20px;
}

.product-params {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 4px 24px;
    margin-bottom: 28px;
    background: var(--color-gray-bg);
    padding: 20px 24px;
    border-radius: 12px;
}

.product-params dl {
    display: flex;
    padding: 6px 0;
    border-bottom: 1px solid rgba(0, 0, 0, 0.05);
}

.product-params dl:nth-last-child(-n+2) {
    border-bottom: none;
}

.product-params dt {
    font-size: 14px;
    color: var(--color-gray-text);
    min-width: 70px;
    font-weight: 400;
}

.product-params dd {
    font-size: 14px;
    font-weight: 500;
    color: var(--color-black);
}

.product-actions {
    display: flex;
    gap: 16px;
    flex-wrap: wrap;
}

.product-action-tip {
    font-size: 13px;
    color: var(--color-gray-text);
    margin-top: 12px;
}

/* Tab 区域 */
.product-description {
    padding: 40px 0 60px;
    background: var(--color-gray-bg);
}

.desc-tabs {
    display: flex;
    gap: 0;
    border-bottom: 2px solid var(--color-border);
    margin-bottom: 32px;
}

.tab-btn {
    padding: 12px 24px;
    font-size: 15px;
    font-weight: 500;
    background: none;
    border: none;
    border-bottom: 2px solid transparent;
    margin-bottom: -2px;
    cursor: pointer;
    color: var(--color-gray-text);
    transition: all 0.2s;
    font-family: inherit;
}

.tab-btn:hover {
    color: var(--color-black);
}

.tab-btn.active {
    color: var(--color-black);
    border-bottom-color: var(--color-blue);
}

.tab-content {
    display: none;
    padding: 4px 0;
}

.tab-content.active {
    display: block;
}

.tab-content h3 {
    font-size: 20px;
    font-weight: 600;
    margin-bottom: 12px;
}

.tab-content p {
    font-size: 15px;
    color: var(--color-gray-text);
    line-height: 1.8;
    margin-bottom: 16px;
}

.tab-content img {
    max-width: 100%;
    border-radius: 12px;
    margin-top: 12px;
}

/* 参数表格 */
.spec-table {
    width: 100%;
    border-collapse: collapse;
    font-size: 15px;
}

.spec-table td {
    padding: 10px 12px;
    border-bottom: 1px solid var(--color-border);
}

.spec-table tr:last-child td {
    border-bottom: none;
}

.spec-table td:first-child {
    font-weight: 500;
    color: var(--color-gray-text);
    width: 120px;
}

/* 应用场景网格 */
.app-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 12px;
}

.app-item {
    padding: 16px;
    background: var(--color-white);
    border-radius: 12px;
    text-align: center;
    font-size: 15px;
    border: 1px solid var(--color-border);
    transition: border-color 0.2s;
}

.app-item:hover {
    border-color: var(--color-blue);
}

/* 定制列表 */
.custom-list {
    list-style: none;
    padding: 0;
    font-size: 15px;
    color: var(--color-gray-text);
    line-height: 2.2;
}

.custom-list strong {
    color: var(--color-black);
}

/* 相关产品 */
.related-products {
    padding: 60px 0;
    background: var(--color-white);
}

/* ========== 响应式 ========== */
@media (max-width: 1024px) {
    .product-detail-inner {
        gap: 40px;
    }
    .product-title {
        font-size: 28px;
    }
}

@media (max-width: 768px) {
    .product-detail-inner {
        grid-template-columns: 1fr;
        gap: 32px;
    }

    .product-gallery {
        position: static;
    }

    .main-image {
        aspect-ratio: 1/1;
    }

    .thumbnails img {
        width: 60px;
        height: 60px;
    }

    .product-params {
        grid-template-columns: 1fr;
        padding: 16px;
    }

    .product-params dl {
        border-bottom: 1px solid rgba(0, 0, 0, 0.05);
        padding: 8px 0;
    }

    .product-params dl:last-child {
        border-bottom: none;
    }

    .desc-tabs {
        overflow-x: auto;
        gap: 0;
    }

    .tab-btn {
        padding: 10px 16px;
        font-size: 14px;
        white-space: nowrap;
    }

    .app-grid {
        grid-template-columns: repeat(2, 1fr);
    }

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

@media (max-width: 480px) {
    .app-grid {
        grid-template-columns: 1fr 1fr;
    }
    .product-actions {
        flex-direction: column;
    }
    .product-actions .btn {
        width: 100%;
        text-align: center;
    }
}