/* ================================================================
   pd.css —— 产品详情页独有样式
   引入顺序：common.css → pd.css
================================================================ */

/* ===== 上一篇 / 下一篇导航 ===== */
.prev-next-nav {
    margin-top: 40px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 20px;
    padding: 12px 16px;
    background: var(--bg-gray);
    border-radius: 6px;
    font-size: 14px;
}
.prev-next-nav a {
    color: var(--main);
    transition: color 0.2s ease;
}
.prev-next-nav a:hover {
    color: var(--hover);
}
.prev-next-nav .disabled {
    color: var(--text-light);
    cursor: default;
}
.prev-next-nav .pn-right {
    text-align: right;
}

/* ===== 商品标题 / 图片 / 描述 ===== */
h1 {
    font-size: 28px;
    margin-bottom: 24px;
    text-align: center;
}
.product-img {
    text-align: center;
    margin-bottom: 24px;
}
.product-img img {
    max-width: 480px;
    width: 100%;
    height: auto;
    border-radius: 6px;
    border: 1px solid var(--border);
    background: var(--bg-gray);
}
.product-desc {
    font-size: 15px;
    color: var(--text-gray);
    margin-bottom: 24px;
}
.desc-note {
    font-size: 13px;
    color: var(--text-light);
    margin: 6px 0 20px 0;
}
/* ===== 产品参数 ===== */
.product-param {
    padding: 16px;
    background: var(--bg-gray);
    border-radius: 6px;
    margin-bottom: 24px;
    display: flex;
    flex-wrap: wrap;
    gap: 24px;
    align-items: center;
}
.product-param .label {
    color: var(--main);
    font-weight: 500;
}
.param-line-dash {
    border-bottom: 1px dashed #ccd6dd;
    width: 100%;
    margin: 10px 0 12px;
}

/* ===== 购买入口区块 ===== */
.buy-wrap {
    padding: 20px;
    border: 1px solid var(--border);
    border-radius: 6px;
}
.buy-list {
    display: flex;
    flex-direction: column;
    gap: 16px;
}
.buy-item {
    display: flex;
    align-items: center;
    padding: 12px 14px;
    background: var(--bg-gray);
    border-radius: 4px;
    gap: 16px;
    flex-wrap: nowrap;
}
.platform-tag {
    padding: 4px 12px;
    background: var(--main);
    color: var(--white);
    border-radius: 4px;
    flex-shrink: 0;
}
.shop-name {
    flex: 1;
    min-width: 0;
}
.item-price {
    color: var(--price);
    font-weight: bold;
    min-width: 80px;
    text-align: right;
    flex-shrink: 0;
}
.buy-btn a {
    padding: 7px 20px;
    background: var(--main);
    color: var(--white);
    border-radius: 4px;
    white-space: nowrap;
    flex-shrink: 0;
}
.buy-btn a:hover {
    background: var(--hover);
}

/* ===== Tab 切换 ===== */
.tab-wrap {
    margin-top: 15px;
}
.tab-title {
    display: flex;
    border-bottom: 1px solid var(--border);
    overflow-x: auto;
}
.tab-item {
    padding: 10px 20px;
    cursor: pointer;
    color: var(--text-gray);
    border-bottom: 2px solid transparent;
    white-space: nowrap;
}
.tab-item.active {
    color: var(--main);
    border-color: var(--main);
}
.tab-content {
    padding: 20px 0;
}
.tab-panel {
    display: none;
}
.tab-panel.active {
    display: block;
}

/* ===== 同类商品行列表 ===== */
.row-list {
    border: 1px solid var(--border);
    border-radius: 4px;
    overflow: hidden;
}
.row-item {
    display: flex;
    align-items: center;
    padding: 15px 15px;
    gap: 15px;
    border-bottom: 1px solid var(--border);
}
.row-item:hover {
    background: var(--bg-gray);
}
.row-item:last-child {
    border-bottom: none;
}
.row-img {
    width: 70px;
    height: 70px;
    flex-shrink: 0;
    display: flex;
    align-items: center;
    justify-content: center;
}
.row-img img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    border-radius: 4px;
    border: 1px solid var(--border);
    background: var(--bg-gray);
}
.row-text {
    flex: 1;
    display: flex;
    flex-direction: column;
    gap: 6px;
    min-width: 0;
}
.row-title {
    font-size: 14px;
    line-height: 1.5;
}
.row-shop {
    font-size: 12px;
    color: var(--text-light);
}
.row-price {
    width: 100px;
    text-align: center;
    color: var(--price);
    font-weight: 500;
    flex-shrink: 0;
}
.row-btn a {
    padding: 6px 12px;
    background: var(--main);
    color: var(--white);
    border-radius: 4px;
    white-space: nowrap;
    flex-shrink: 0;
}
.row-btn a:hover {
    background: var(--hover);
}

/* ===== 相关产品卡片（.card-item 上下文，与列表页 .product-card 隔离） ===== */
.mod {
    margin-top: 40px;
    padding-top: 20px;
    border-top: 1px solid var(--border);
}
.mod h3 {
    font-size: 18px;
    margin-bottom: 8px;
    padding-bottom: 8px;
    border-bottom: 1px dashed var(--border);
}
.card-wrap {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(180px, 1fr));
    gap: 24px;
    margin-top: 15px;
}
.card-item {
    display: block;
    border: 1px solid var(--border);
    border-radius: 8px;
    overflow: hidden;
    background: #fff;
    transition: all 0.3s ease;
    will-change: transform;
}
.card-item:hover {
    box-shadow: 0 4px 12px rgba(68, 114, 156, 0.18);
    transform: translateY(-3px);
    border-color: var(--main);
}
.card-item .card-img {
    width: 100%;
    height: 150px;
    background: var(--bg-gray);
    display: flex;
    align-items: center;
    justify-content: center;
    border-bottom: 1px solid var(--border);
}
.card-item .card-img img {
    width: 90%;
    height: 90%;
    object-fit: cover;
    border-radius: 4px;
}
.card-item .card-info {
    padding: 14px;
}
.card-item .card-title {
    font-size: 14px;
    line-height: 1.5;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
    text-overflow: ellipsis;
    min-height: 44px;
    color: var(--text-dark);
}
.card-item .card-price {
    color: var(--price);
    font-weight: 600;
    font-size: 15px;
    margin-top: 10px;
}

/* ===== 购买提示 / 联系方式框 ===== */
.buy-tip {
    background: var(--tip-bg);
    border: 1px solid var(--border);
    border-left: 4px solid var(--tip-border-left);
    border-radius: 4px;
    padding: 16px 20px;
    margin: 20px 0 28px;
}
.buy-tip-row {
    display: flex;
    align-items: flex-start;
    gap: 10px;
    padding: 2px 0;
}
.buy-tip-divider {
    border-top: 1px dashed var(--tip-dash);
    margin: 8px 0;
}
.tip-icon {
    font-size: 16px;
    flex-shrink: 0;
    margin-top: 2px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 1.8em;
    line-height: 1.4;
}
.tip-text {
    flex: 1;
    font-size: 14px;
    line-height: 1.7;
    color: var(--text-dark);
}
.tip-text strong {
    color: var(--main);
}
.site-price {
    font-size: 17px;
    font-weight: 700;
    color: var(--price);
    background: var(--price-bg);
    padding: 0 8px;
    border-radius: 3px;
}
.buy-tip-contact {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: 4px 6px;
    padding-top: 2px;
    font-size: 14px;
    color: var(--text-dark);
}
.contact-label {
    font-weight: 600;
    color: var(--main);
    margin-right: 4px;
}
.contact-item {
    display: inline-flex;
    align-items: center;
    gap: 4px;
}
.contact-icon {
    font-size: 14px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 1.6em;
    flex-shrink: 0;
}
.contact-link {
    color: var(--mail-color);
    text-decoration: none;
    font-weight: 500;
}
.contact-link:hover {
    text-decoration: underline;
}
.wechat-id {
    background: var(--wechat-bg);
    color: var(--wechat-color);
    font-weight: 600;
    padding: 0 10px;
    border-radius: 3px;
    font-size: 14px;
}
.contact-hint {
    color: var(--text-light);
    font-size: 12px;
}
.contact-divider {
    color: var(--text-light);
    font-size: 13px;
}
.contact-sep-mobile {
    display: none;
    width: 100%;
    height: 1px;
    background: var(--tip-dash);
    margin: 4px 0;
}
.contact-items-wrap {
    display: inline-flex;
    flex-wrap: wrap;
    align-items: center;
    gap: 2px 4px;
}

/* ===== 详情页响应式 ===== */
@media (max-width: 1024px) {
    .card-wrap {
        gap: 18px;
        grid-template-columns: repeat(auto-fill, minmax(160px, 1fr));
    }
    .card-item .card-img {
        height: 130px;
    }
}

@media (max-width: 768px) {
    h1 {
        font-size: 22px;
    }
    .product-img img {
        max-width: 100%;
    }
    .card-wrap {
        gap: 14px;
        grid-template-columns: repeat(auto-fill, minmax(140px, 1fr));
    }
    .card-item .card-img {
        height: 120px;
    }
    .mod h3 {
        font-size: 16px;
    }
    .prev-next-nav {
        flex-direction: column;
        gap: 10px;
    }
    .pn-right {
        text-align: left !important;
    }
}

@media (max-width: 600px) {
    .buy-tip {
        padding: 12px 14px;
        margin: 12px 0 18px;
    }
    .buy-tip-row {
        gap: 8px;
    }
    .tip-text {
        font-size: 13px;
    }
    .site-price {
        font-size: 15px;
    }
    .buy-tip-contact {
        font-size: 13px;
        gap: 6px 4px;
        flex-direction: column;
        align-items: flex-start;
    }
    .contact-divider {
        display: none;
    }
    .contact-sep-mobile {
        display: block;
    }
    .contact-item {
        display: flex;
        align-items: center;
        gap: 4px;
    }
    .wechat-id {
        font-size: 13px;
    }
    .contact-hint {
        font-size: 11px;
    }
    .contact-items-wrap {
        display: flex;
        flex-direction: column;
        align-items: flex-start;
        margin-top: 4px;
    }
}

@media (max-width: 480px) {
    .card-wrap {
        gap: 12px;
        grid-template-columns: repeat(2, 1fr);
    }
    .card-item .card-img {
        height: 110px;
    }
    .card-item .card-info {
        padding: 10px;
    }
    .card-item .card-title {
        font-size: 13px;
        min-height: 38px;
    }
    .card-item .card-price {
        font-size: 14px;
        margin-top: 6px;
    }
    .buy-item {
        flex-wrap: wrap;
        gap: 8px;
    }
    .shop-name {
        flex-basis: 100%;
    }
}