/* ========================================
   SKINWTR 水初语 - 产品中心 product.css
   左侧分类导航 + 右侧 Banner + 产品网格
   ======================================== */

/* ===== 产品页整体布局 ===== */
.product-page {
    display: flex;
    max-width: var(--container-width);
    margin: 30px auto;
    padding: 0 16px;
    gap: 0;
    min-height: 600px;
}

/* ===== 左侧分类导航 ===== */
.product-sidebar {
    flex: 0 0 200px;
    width: 200px;
    background: #e8eaed;
    border-radius: var(--radius-md) 0 0 var(--radius-md);
    overflow: hidden;
}

.category-list {
    padding: 12px 0;
}

.category-item {
    display: flex;
    align-items: center;
    gap: 14px;
    padding: 16px 24px;
    cursor: pointer;
    transition: var(--transition);
    color: var(--color-primary);
    font-size: 16px;
    font-weight: 500;
    position: relative;
    user-select: none;
}

.category-item i {
    font-size: 22px;
    color: var(--color-primary-light);
    flex-shrink: 0;
    transition: var(--transition);
}

.category-item:hover {
    background: #dde1e6;
    color: var(--color-primary);
}

.category-item:hover i {
    color: var(--color-primary);
    transform: scale(1.1);
}

/* 选中态（当前激活的分类） */
.category-item.active {
    background: #fff;
    color: var(--color-primary);
    font-weight: 600;
    box-shadow: 2px 2px 8px rgba(0,0,0,.06);
}

.category-item.active i {
    color: var(--color-primary);
}

/* ===== 右侧内容区 ===== */
.product-content {
    flex: 1;
    background: #fff;
    border-radius: 0 var(--radius-md) var(--radius-md) 0;
    padding: 24px 32px 40px;
    min-width: 0; /* 防止 flex 子项溢出 */
}

/* ===== Banner 区域 ===== */
.product-banner {
    width: 100%;
    border-radius: var(--radius-sm);
    overflow: hidden;
    margin-bottom: 20px;
    line-height: 0;
}

.product-banner img {
    width: 100%;
    height: auto;
    display: block;
    object-fit: cover;
    transition: opacity .35s ease;
}

/* ===== 分类标题 ===== */
.category-title {
    font-size: 16px;
    color: var(--color-text-secondary);
    margin-bottom: 24px;
    padding-left: 4px;
    letter-spacing: 1px;
    transition: var(--transition);
}

/* ===== 产品网格（每行 3 个）===== */
.product-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 28px 24px;
}

.product-item {
    text-align: center;
    cursor: pointer;
    transition: var(--transition);
    padding: 16px 10px;
    border-radius: var(--radius-md);
    text-decoration: none;
    color: inherit;
    display: block;
}

.product-item:hover {
    background: var(--color-gradient-light);
    transform: translateY(-4px);
    box-shadow: var(--shadow-sm);
}

.product-item .product-img {
    width: 100%;
    aspect-ratio: 1 / 1;
    object-fit: contain;
    margin-bottom: 14px;
    transition: transform .3s ease;
}

.product-item:hover .product-img {
    transform: scale(1.05);
}

.product-item .product-name {
    font-size: 14px;
    color: var(--color-text-secondary);
    transition: var(--transition);
}

.product-item:hover .product-name {
    color: var(--color-primary);
}

/* ===== 响应式：平板 768-991px ===== */
@media (max-width: 991px) {
    .product-page {
        flex-direction: column;
        margin: 16px auto;
        padding: 0 12px;
    }

    .product-sidebar {
        flex: none;
        width: 100%;
        border-radius: var(--radius-md) var(--radius-md) 0 0;
    }

    .category-list {
        display: flex;
        overflow-x: auto;
        gap: 0;
        padding: 8px 12px;
        -webkit-overflow-scrolling: touch;
    }

    .category-list::-webkit-scrollbar { height: 3px; }
    .category-list::-webkit-scrollbar-thumb { background: #ccc; border-radius: 3px; }

    .category-item {
        flex: 0 0 auto;
        padding: 10px 18px;
        font-size: 14px;
        gap: 8px;
        white-space: nowrap;
        border-radius: var(--radius-pill);
    }

    .category-item i { font-size: 18px; }

    .category-item.active {
        border-radius: var(--radius-pill);
        box-shadow: var(--shadow-sm);
    }

    .product-content {
        border-radius: 0 0 var(--radius-md) var(--radius-md);
        padding: 20px 16px 32px;
    }

    .product-grid {
        grid-template-columns: repeat(3, 1fr);
        gap: 20px 14px;
    }
}

/* ===== 响应式：手机 < 768px ===== */
@media (max-width: 767px) {
    .product-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: 16px 10px;
    }

    .product-content {
        padding: 16px 12px 24px;
    }

    .product-banner {
        margin-bottom: 14px;
    }

    .category-title {
        font-size: 14px;
        margin-bottom: 16px;
    }

    .product-item { padding: 10px 6px; }
    .product-item .product-name { font-size: 13px; }
}

/* ========================================
   产品详情页 product_details.html 样式
   ======================================== */

/* ===== 面包屑导航 ===== */
.product-detail-breadcrumb {
    background: #fff;
    border-bottom: 1px solid var(--color-border);
}

.breadcrumb-inner {
    width: 70%;
    margin: 0 auto;
    padding: 16px 0;
    font-size: 14px;
    color: var(--color-text-secondary);
}

.breadcrumb-inner a {
    color: var(--color-text-secondary);
    transition: var(--transition);
}

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

.breadcrumb-inner .sep {
    margin: 0 6px;
    color: var(--color-text-light);
}

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

/* ===== 详情页主体容器：左右各留 15%，中间 70% ===== */
.product-detail-wrap {
    width: 70%;
    margin: 0 auto;
    padding: 40px 0 60px;
}

.product-detail-main {
    display: flex;
    gap: 40px;
    align-items: flex-start;
}

/* ===== 左侧画廊 60% ===== */
.product-detail-gallery {
    flex: 0 0 60%;
    max-width: 60%;
    min-width: 0;
    display: flex;
    flex-direction: column;
    height: calc(100vh - 110px); /* 刚好占满屏幕高度（减去头部+面包屑） */
    gap: 16px;
}

/* 主图：占满画廊剩余高度，自适应居中 */
.detail-main-img {
    flex: 1;
    min-height: 0; /* 关键：允许 flex 子项收缩 */
    display: flex;
    align-items: center;
    justify-content: center;
    background: #f8f9fb;
    border-radius: var(--radius-md);
    overflow: hidden;
    line-height: 0;
}

.detail-main-img img {
    width: 100%;
    height: 100%;
    display: block;
    object-fit: contain; /* 完整显示图片，比例不符时上下左右留白（灰底） */
    transition: opacity .35s ease;
}

/* 缩略图列表：一排 5 张，超出横向滚动 */
.detail-thumbs {
    flex-shrink: 0; /* 保持缩略图行高度，不被主图挤压 */
    display: flex;
    gap: 12px;
    overflow-x: auto;
    padding-bottom: 6px;
    -webkit-overflow-scrolling: touch;
}

.detail-thumbs::-webkit-scrollbar { height: 4px; }
.detail-thumbs::-webkit-scrollbar-thumb { background: #ccc; border-radius: 2px; }

.thumb-item {
    flex: 0 0 calc((100% - 48px) / 5); /* 5 张，gap 共 48px */
    max-width: calc((100% - 48px) / 5);
    aspect-ratio: 1 / 1;
    background: #f8f9fb;
    border: 2px solid transparent;
    border-radius: var(--radius-sm);
    overflow: hidden;
    cursor: pointer;
    transition: var(--transition);
    line-height: 0;
}

.thumb-item img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    display: block;
}

.thumb-item:hover {
    border-color: var(--color-primary-lighter);
}

.thumb-item.active {
    border-color: var(--color-primary);
    box-shadow: 0 0 0 2px rgba(26, 58, 122, .08);
}

/* ===== 右侧信息 40% ===== */
.product-detail-info {
    flex: 0 0 40%;
    max-width: 40%;
    min-width: 0;
    padding-top: 10px;
}

.detail-subtitle {
    font-size: 18px;
    color: var(--color-text-secondary);
    line-height: 1.5;
    letter-spacing: 1px;
}

.detail-name {
    font-size: 32px;
    font-weight: 700;
    color: var(--color-primary);
    margin: 12px 0 16px;
    line-height: 1.3;
}

.detail-divider {
    width: 100%;
    height: 3px;
    background: var(--color-primary);
    margin-bottom: 20px;
}

.detail-tags {
    display: flex;
    align-items: center;
    justify-content: flex-end;
    gap: 12px;
    font-size: 18px;
    color: var(--color-text-secondary);
    margin-bottom: 12px;
}

.tag-sep {
    color: var(--color-text-light);
    font-weight: 300;
}

.detail-price {
    font-size: 28px;
    font-weight: 700;
    color: var(--color-primary);
    margin-bottom: 32px;
    text-align: right;
}

/* 信息块 */
.detail-section {
    margin-bottom: 24px;
    font-size: 14px;
    color: var(--color-text-secondary);
    line-height: 1.8;
}

.detail-section h3 {
    display: inline-block;
    font-size: 14px;
    font-weight: 600;
    color: var(--color-primary);
    margin-right: 4px;
    margin-bottom: 4px;
}

.detail-section p {
    display: inline;
    color: var(--color-text-secondary);
}

/* 购买按钮 */
.detail-action {
    margin-top: 40px;
    padding-top: 30px;
    border-top: 2px solid var(--color-primary);
}

.btn-buy {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-width: 160px;
    padding: 14px 36px;
    background: var(--color-primary);
    color: #fff;
    font-size: 16px;
    font-weight: 500;
    border-radius: var(--radius-sm);
    transition: var(--transition);
}

.btn-buy:hover {
    background: var(--color-primary-light);
    transform: translateY(-2px);
    box-shadow: 0 6px 18px rgba(26, 58, 122, .25);
}

/* ===== 详情页响应式 ===== */
@media (max-width: 991px) {
    .breadcrumb-inner,
    .product-detail-wrap {
        width: 100%;
        padding-left: 16px;
        padding-right: 16px;
    }

    .product-detail-main {
        flex-direction: column;
        gap: 32px;
    }

    .product-detail-gallery,
    .product-detail-info {
        flex: 0 0 100%;
        max-width: 100%;
    }

    /* 堆叠时画廊恢复自适应高度，不使用屏幕高度 */
    .product-detail-gallery {
        height: auto;
    }

    .detail-name { font-size: 26px; }
    .detail-price { font-size: 24px; }
}

@media (max-width: 767px) {
    .breadcrumb-inner { padding: 12px 0; font-size: 13px; }
    .product-detail-wrap { padding: 24px 0 40px; }
    .detail-subtitle { font-size: 15px; }
    .detail-name { font-size: 22px; }
    .detail-tags { font-size: 15px; }
    .detail-price { font-size: 20px; margin-bottom: 24px; }
    .detail-section { margin-bottom: 18px; }
    .detail-action { margin-top: 28px; padding-top: 20px; }
    .btn-buy { width: 100%; min-width: auto; }
}

/* ===== 产品详情扩展区块：标题 + 分隔线 + 100% 宽图片 ===== */
.product-detail-extra {
    margin-top: 60px;
}

.detail-extra-title {
    font-size: 24px;
    font-weight: 600;
    color: var(--color-primary);
    margin-bottom: 16px;
}

.detail-extra-line {
    width: 100%;
    height: 1px;
    background: #e5e7eb;
    margin-bottom: 24px;
}

.detail-extra-img {
    width: 100%;
    line-height: 0;
}

.detail-extra-img img {
    width: 100%;
    height: auto;
    display: block;
}