/* product_detail.css — SKU 详情页（views/products/） */

.page-product-detail .lp-main {
    padding-top: var(--lp-spacing-md, 16px);
    padding-bottom: var(--lp-spacing-2xl, 48px);
}

.page-product-detail .catalog-page-content {
    padding-top: var(--lp-spacing-md, 16px);
}

.product-detail__layout {
    display: grid;
    grid-template-columns: minmax(0, 1.05fr) minmax(0, 0.95fr);
    gap: 40px 56px;
    align-items: start;
}

.product-detail__layout > * {
    min-width: 0;
}

@media (max-width: 900px) {
    .product-detail__layout {
        grid-template-columns: 1fr;
        gap: 28px;
    }
}

.product-detail__gallery {
    position: sticky;
    top: calc(var(--header-topbar-height, 0px) + var(--header-height-nav, 72px) + 16px);
    width: 100%;
    min-width: 0;
    max-width: 100%;
    overflow-x: clip;
}

.product-detail__gallery-desktop {
    position: relative;
    display: block;
    box-sizing: border-box;
    width: 100%;
    min-width: 0;
    max-width: 100%;
}

.product-detail__gallery-desktop.has-thumbs {
    padding-left: 86px;
}

.product-detail__carousel {
    display: none;
}

.product-detail {
    display: grid;
    gap: 44px;
    max-width: 1320px;
    margin: 0 auto;
}

.product-detail__carousel-track {
    display: flex;
    gap: 10px;
    overflow-x: auto;
    scroll-snap-type: x mandatory;
    scroll-snap-stop: always;
    scroll-behavior: smooth;
    -webkit-overflow-scrolling: touch;
    scrollbar-width: none;
    box-sizing: border-box;
    padding: 0 9%;
    background: transparent;
}

.product-detail__carousel-track::-webkit-scrollbar {
    display: none;
}

.product-detail__carousel-slide {
    flex: 0 0 100%;
    scroll-snap-align: center;
    aspect-ratio: 1;
    border-radius: 14px;
    overflow: hidden;
    background: #0a0a0a;
    opacity: 0.52;
    transform: scale(0.92);
    transition: opacity 0.24s ease, transform 0.24s ease, box-shadow 0.24s ease;
}

.product-detail__carousel-slide.is-active {
    opacity: 1;
    transform: scale(1);
    box-shadow: 0 10px 28px rgba(24, 24, 24, 0.14);
}

.product-detail__carousel-slide img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    display: block;
}

.product-detail__carousel-dots {
    display: flex;
    justify-content: center;
    gap: 8px;
    margin: 12px 0 0;
    padding: 0;
}

.product-detail__carousel-dot {
    width: 8px;
    height: 8px;
    padding: 0;
    border: none;
    border-radius: 50%;
    background: #c4c7c5;
    cursor: pointer;
    transition: transform 0.2s ease, background 0.2s ease;
}

.product-detail__carousel-dot.is-active {
    background: var(--color-primary, #1a1a1a);
    transform: scale(1.15);
}

@media (max-width: 900px) {
    .product-detail__gallery {
        position: static;
    }

    .product-detail__gallery-desktop {
        display: none;
    }

    .product-detail__carousel {
        display: block;
        overflow: hidden;
    }
}

.product-detail__main-media {
    position: relative;
    width: 100%;
    min-width: 0;
    max-width: 100%;
    aspect-ratio: 1;
    background: #0a0a0a;
    border: none;
    border-radius: 14px;
    overflow: hidden;
    box-shadow: 0 8px 22px rgba(24, 24, 24, 0.07);
    cursor: zoom-in;
}

.product-detail__main-media img {
    display: block;
    width: 100%;
    max-width: 100%;
    height: 100%;
    object-fit: cover;
}

.product-detail__zoom {
    position: absolute;
    right: 16px;
    bottom: 16px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    min-height: 38px;
    padding: 0 16px;
    color: #fff;
    font-size: 0.76rem;
    font-weight: 600;
    white-space: nowrap;
    background: rgba(28, 28, 28, 0.82);
    border: 1px solid rgba(255, 255, 255, 0.18);
    border-radius: 999px;
    box-shadow: 0 8px 24px rgba(0, 0, 0, 0.2);
    cursor: pointer;
    backdrop-filter: blur(8px);
    opacity: 0;
    transform: translateY(8px);
    pointer-events: none;
    transition: opacity 0.2s ease, transform 0.2s ease, background 0.2s ease;
}

.product-detail__main-media:hover .product-detail__zoom,
.product-detail__main-media:focus-within .product-detail__zoom {
    opacity: 1;
    transform: translateY(0);
    pointer-events: auto;
}

.product-detail__zoom:hover {
    background: rgba(16, 16, 16, 0.94);
}

.product-detail__placeholder {
    display: block;
    width: 100%;
    height: 100%;
    background: linear-gradient(145deg, #2a2a2a, #111);
}

.product-detail__thumbs {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 10px;
    margin: 0;
    padding: 0;
    list-style: none;
}

.product-detail__thumb-carousel {
    position: absolute;
    top: 0;
    bottom: 0;
    left: 0;
    display: grid;
    grid-template-rows: auto minmax(0, 1fr) auto;
    gap: 8px;
    width: 74px;
    min-height: 0;
    padding: 8px 6px;
    background: rgba(248, 248, 247, 0.72);
    border: none;
    border-radius: 14px;
    box-shadow: 0 6px 18px rgba(24, 24, 24, 0.04);
}

.product-detail__thumb-viewport {
    min-height: 0;
    overflow-x: hidden;
    overflow-y: auto;
    scrollbar-width: none;
    scroll-behavior: smooth;
}

.product-detail__thumb-viewport::-webkit-scrollbar {
    display: none;
}

.product-detail__thumb-nav {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 34px;
    height: 34px;
    padding: 0;
    border: 1px solid rgba(38, 43, 47, 0.28);
    border-radius: 999px;
    background: #fff;
    color: #20262b;
    cursor: pointer;
    line-height: 0;
    box-shadow: 0 3px 10px rgba(20, 24, 27, 0.13);
    animation: product-thumb-nav-breathe 2.1s ease-in-out infinite;
    transition: color 0.2s ease, border-color 0.2s ease, background 0.2s ease, opacity 0.2s ease, box-shadow 0.2s ease;
}

.product-detail__thumb-nav svg {
    display: block;
    width: 19px;
    height: 19px;
    flex: 0 0 19px;
}

.product-detail__thumb-nav:hover {
    color: var(--color-accent);
    border-color: var(--color-accent);
    background: #fff;
    box-shadow: 0 5px 14px rgba(20, 24, 27, 0.2);
    animation-play-state: paused;
}

.product-detail__thumb-nav:disabled {
    opacity: 0.34;
    cursor: default;
    box-shadow: none;
    animation: none;
}

@keyframes product-thumb-nav-breathe {
    0%,
    100% {
        transform: scale(1);
        box-shadow: 0 3px 10px rgba(20, 24, 27, 0.13);
    }

    50% {
        transform: scale(1.08);
        box-shadow: 0 5px 15px rgba(20, 24, 27, 0.24);
    }
}

.product-detail__thumb {
    width: 60px;
    height: 60px;
    flex: 0 0 60px;
    padding: 0;
    border: 0;
    border-radius: 9px;
    overflow: hidden;
    cursor: pointer;
    background: #111;
    opacity: 0.48;
    filter: grayscale(0.65) saturate(0.5) blur(0.35px);
    transform: translateY(0);
    transition: opacity 0.2s ease, filter 0.2s ease, transform 0.2s ease, box-shadow 0.2s ease;
}

.product-detail__thumb img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.product-detail__thumb:hover {
    opacity: 0.82;
    filter: grayscale(0.2) saturate(0.85);
}

.product-detail__thumb:focus-visible,
.product-detail__thumb-nav:focus-visible,
.product-detail__zoom:focus-visible {
    outline: 2px solid var(--color-accent);
    outline-offset: 2px;
}

.product-detail__thumb.is-active {
    opacity: 1;
    filter: none;
    transform: translateX(1px);
    box-shadow: 0 7px 18px rgba(0, 0, 0, 0.14);
}

.product-detail__thumb-nav {
    justify-self: center;
}

.product-detail__lightbox {
    inset: 0;
    box-sizing: border-box;
    width: 100vw;
    max-width: none;
    height: 100vh;
    max-height: none;
    margin: 0;
    padding: 32px 88px;
    overflow: hidden;
    background: #080808;
    border: none;
    border-radius: 0;
    user-select: none;
    -webkit-user-select: none;
}

.product-detail__lightbox::backdrop {
    background: #080808;
}

.product-detail__lightbox[open] {
    display: flex;
    align-items: center;
    justify-content: center;
}

.product-detail__lightbox-media {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 100%;
    min-width: 0;
    height: 100%;
}

.product-detail__lightbox-media img {
    max-width: calc(100vw - 176px);
    max-height: calc(100vh - 64px);
    object-fit: contain;
    filter: drop-shadow(0 20px 50px rgba(0, 0, 0, 0.42));
    -webkit-user-drag: none;
}

.product-detail__lightbox-close,
.product-detail__lightbox-nav {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 52px;
    height: 52px;
    padding: 0;
    color: #fff;
    background: rgba(255, 255, 255, 0.16);
    border: 1px solid rgba(255, 255, 255, 0.3);
    border-radius: 50%;
    box-shadow: 0 8px 26px rgba(0, 0, 0, 0.32);
    cursor: pointer;
}

.product-detail__lightbox-close svg,
.product-detail__lightbox-nav svg {
    display: block;
    flex: 0 0 auto;
}

.product-detail__lightbox-close {
    position: absolute;
    top: 24px;
    right: 28px;
    z-index: 2;
}

.product-detail__lightbox-nav {
    position: fixed;
    top: 50%;
    z-index: 2;
    width: 56px;
    height: 56px;
    transform: translateY(-50%);
    transition: background 0.2s ease, border-color 0.2s ease, transform 0.2s ease;
    animation: product-detail-nav-breathe 2.2s ease-in-out infinite;
}

.product-detail__lightbox-nav--prev {
    left: 28px;
}

.product-detail__lightbox-nav--next {
    right: 28px;
    animation-delay: 0.25s;
}

.product-detail__lightbox-nav:not(:disabled):hover,
.product-detail__lightbox-close:hover {
    background: rgba(255, 255, 255, 0.18);
    border-color: rgba(255, 255, 255, 0.35);
}

.product-detail__lightbox-nav:not(:disabled):hover {
    animation-play-state: paused;
    transform: translateY(-50%) scale(1.06);
}

.product-detail__lightbox-nav:disabled {
    opacity: 0.28;
    cursor: not-allowed;
    animation: none;
    box-shadow: none;
}

.product-detail__lightbox-counter {
    position: fixed;
    bottom: 24px;
    left: 50%;
    padding: 7px 13px;
    color: rgba(255, 255, 255, 0.78);
    font-size: 0.76rem;
    letter-spacing: 0.08em;
    background: rgba(255, 255, 255, 0.08);
    border: 1px solid rgba(255, 255, 255, 0.12);
    border-radius: 999px;
    transform: translateX(-50%);
}

.product-detail__lightbox-hint {
    position: fixed;
    bottom: 68px;
    left: 50%;
    margin: 0;
    color: rgba(255, 255, 255, 0.58);
    font-size: 0.72rem;
    letter-spacing: 0.03em;
    white-space: nowrap;
    pointer-events: none;
    transform: translateX(-50%);
}

@keyframes product-detail-nav-breathe {
    0%,
    100% {
        opacity: 0.68;
        box-shadow: 0 0 0 0 rgba(255, 255, 255, 0);
        transform: translateY(-50%) scale(0.96);
    }

    50% {
        opacity: 1;
        box-shadow: 0 0 0 7px rgba(255, 255, 255, 0.08);
        transform: translateY(-50%) scale(1.04);
    }
}

@media (prefers-reduced-motion: reduce) {
    .product-detail__lightbox-nav,
    .product-detail__thumb-nav {
        animation: none;
    }
}

.product-detail__carousel--single .product-detail__carousel-track {
    padding: 0;
}

.product-detail__carousel--single .product-detail__carousel-slide {
    flex-basis: 100%;
    opacity: 1;
    transform: none;
}

.product-detail__info {
    padding: 20px 24px 22px;
    background: linear-gradient(180deg, #fff 0%, #fbfbfa 100%);
    border: 1px solid var(--lp-border-light, #e8eaed);
    border-radius: 18px;
    box-shadow: 0 18px 40px rgba(24, 24, 24, 0.06);
}

.product-detail__info-block + .product-detail__info-block {
    margin-top: 18px;
    padding-top: 18px;
    border-top: 1px solid var(--lp-border-light, #e8eaed);
}

.product-detail__info-block > :last-child {
    margin-bottom: 0;
}

.product-detail__sku {
    margin: 0 0 10px;
    font-size: 0.75rem;
    font-weight: 600;
    letter-spacing: 0.08em;
    text-transform: uppercase;
    color: var(--lp-text-muted, #80868b);
}

.product-detail__value-proposition {
    margin: 0 0 12px;
    font-size: 0.86rem;
    font-weight: 700;
    line-height: 1.45;
    color: #755f49;
}

.product-detail__title {
    margin: 0 0 8px;
    font-family: var(--font-serif);
    font-size: clamp(1.6rem, 3.2vw, 2.15rem);
    font-weight: 700;
    line-height: 1.22;
    color: var(--color-primary);
}

.product-detail__sub {
    margin: 0 0 14px;
    font-size: 0.95rem;
    font-weight: 600;
    line-height: 1.35;
    color: var(--color-primary);
}

.product-detail__trust-badges {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    margin: 0 0 14px;
    padding: 0;
    list-style: none;
}

.product-detail__trust-badge {
    display: inline-flex;
    align-items: center;
    gap: 7px;
    min-height: 32px;
    padding: 5px 11px;
    font-size: 0.72rem;
    font-weight: 650;
    line-height: 1.3;
    color: #35624b;
    background: #f2f8f4;
    border: 1px solid #d7e8dc;
    border-radius: 999px;
}

.product-detail__trust-badge svg {
    flex: 0 0 auto;
}

.product-detail__badges {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    margin: 0 0 16px;
    padding: 0;
    list-style: none;
}

.product-detail__badge {
    display: inline-flex;
    align-items: center;
    min-height: 28px;
    padding: 0 12px;
    font-size: 0.72rem;
    font-weight: 600;
    letter-spacing: 0.04em;
    text-transform: uppercase;
    color: var(--color-primary);
    background: var(--lp-surface, #f7f6f4);
    border: 1px solid var(--lp-border-light, #e8eaed);
    border-radius: 999px;
}

.product-detail__badge--material {
    color: #5c4a3a;
    background: #f3ede6;
    border-color: #e6d9cc;
}

.product-detail__summary {
    margin: 0 0 22px;
    font-size: 0.98rem;
    line-height: 1.72;
    color: var(--lp-text-secondary, #5f6368);
}

.product-detail__price {
    margin: 0 0 18px;
    font-size: 1.05rem;
    font-weight: 700;
    color: var(--color-primary);
}

.product-detail__highlights {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 12px;
    margin: 0 0 22px;
    padding: 0;
    list-style: none;
}

.product-detail__highlight {
    display: grid;
    gap: 4px;
    min-height: 100%;
    padding: 14px 14px 13px;
    background: #fff;
    border: 1px solid var(--lp-border-light, #e8eaed);
    border-radius: 12px;
}

.product-detail__highlight-label {
    font-size: 0.72rem;
    font-weight: 700;
    letter-spacing: 0.06em;
    text-transform: uppercase;
    color: var(--lp-text-muted, #80868b);
}

.product-detail__highlight-value {
    font-size: 0.88rem;
    line-height: 1.45;
    color: var(--color-primary);
}

.product-detail__specs {
    margin: 0 0 24px;
    padding: 16px 18px;
    background: var(--lp-surface, #f8f9fa);
    border-radius: 12px;
    border: 1px solid var(--lp-border-light, #e8eaed);
}

.product-detail__specs--key {
    margin-bottom: 22px;
}

.product-detail__spec-row {
    display: grid;
    grid-template-columns: 132px 1fr;
    gap: 8px 16px;
    padding: 7px 0;
    font-size: 0.88rem;
}

.product-detail__spec-row:not(:last-child) {
    border-bottom: 1px solid var(--lp-border-light, #eee);
}

.product-detail__spec-row dt {
    margin: 0;
    font-weight: 600;
    color: var(--color-primary);
}

.product-detail__spec-row dd {
    margin: 0;
    color: var(--lp-text-secondary, #5f6368);
}

.product-detail__actions {
    display: flex;
    flex-direction: column;
    gap: 0;
}

.product-detail__action-section {
    padding: 16px 0;
}

.product-detail__action-section + .product-detail__action-section {
    border-top: 1px solid var(--lp-border-light, #e8eaed);
}

.product-detail__quote {
    display: grid;
    gap: 12px;
}

.product-detail__btn--quote {
    min-height: 48px;
    padding: 0 28px;
    font-size: 0.82rem;
    font-weight: 700;
    letter-spacing: 0.05em;
    text-transform: uppercase;
}

.product-detail__section--documents {
    display: grid;
    gap: 12px;
}

.product-detail__downloads-hint {
    margin: 0;
    font-size: 0.78rem;
    line-height: 1.5;
    color: var(--lp-text-secondary, #78716c);
}

.product-detail__download-row {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
}

.product-detail__btn--download {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-height: 42px;
    padding: 0 18px;
    font-size: 0.78rem;
    font-weight: 600;
    letter-spacing: 0.03em;
    text-decoration: none;
    color: var(--color-primary, #3f3f46);
    background: #fff;
    border: 1px solid var(--lp-border-light, #e8eaed);
    border-radius: 4px;
    transition: border-color 0.2s ease, background 0.2s ease, color 0.2s ease;
}

a.product-detail__btn--download:hover {
    color: var(--color-accent, #a08f7d);
    border-color: var(--color-accent, #a08f7d);
    background: #fcfbf9;
}

.product-detail__trade-note {
    margin: 0;
    font-size: 0.74rem;
    line-height: 1.55;
    color: var(--lp-text-muted, #80868b);
}

.product-detail__share {
    display: grid;
    gap: 10px;
}

.product-detail__share-label {
    font-size: 0.72rem;
    font-weight: 700;
    letter-spacing: 0.08em;
    text-transform: uppercase;
    color: var(--lp-text-muted, #80868b);
}

.product-detail__share-links {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
}

.product-detail__share-link {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-height: 34px;
    padding: 0 14px;
    font-size: 0.76rem;
    font-weight: 600;
    color: var(--color-primary);
    text-decoration: none;
    background: #fff;
    border: 1px solid var(--lp-border-light, #e8eaed);
    border-radius: 999px;
    cursor: pointer;
    transition: border-color 0.2s ease, background 0.2s ease, color 0.2s ease;
}

.product-detail__share-link:hover {
    color: var(--color-accent);
    border-color: var(--color-accent);
    background: #fcfbf9;
}

.product-detail__section {
    padding: 28px 30px;
    background: #fff;
    border: 1px solid var(--lp-border-light, #e8eaed);
    border-radius: 18px;
    box-shadow: 0 16px 32px rgba(24, 24, 24, 0.04);
}

.product-detail__section--specifications {
    display: grid;
    gap: 18px;
}

.product-detail__section-title {
    margin: 0 0 18px;
    font-family: var(--font-serif);
    font-size: 1.35rem;
    color: var(--color-primary);
}

.product-detail__section--specifications .product-detail__section-title {
    margin: 0;
}

.product-detail__trade-guidance {
    display: grid;
    gap: 10px;
}

.product-detail__trade-terms {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 12px;
}

.product-detail__trade-term {
    display: grid;
    gap: 5px;
    padding: 15px 16px;
    background: #f8f6f2;
    border: 1px solid #e8e1d8;
    border-radius: 12px;
}

.product-detail__trade-term-label {
    font-size: 0.7rem;
    font-weight: 700;
    letter-spacing: 0.06em;
    text-transform: uppercase;
    color: var(--lp-text-muted, #80868b);
}

.product-detail__trade-term-value {
    font-size: 1rem;
    line-height: 1.35;
    color: var(--color-primary);
}

.product-detail__trade-term-note,
.product-detail__trade-terms-disclaimer {
    font-size: 0.74rem;
    line-height: 1.45;
    color: var(--lp-text-muted, #80868b);
}

.product-detail__trade-terms-disclaimer {
    margin: 0;
}

.product-detail__description-body {
    font-size: 0.95rem;
    line-height: 1.75;
    color: var(--lp-text-primary, #202124);
}

.product-detail__description-body p {
    margin: 0 0 1em;
}

.product-detail__spec-groups {
    display: grid;
    gap: 12px;
}

.product-detail__spec-group {
    border: 1px solid var(--lp-border-light, #e8eaed);
    border-radius: 12px;
    background: #fff;
    overflow: hidden;
}

.product-detail__spec-group-title {
    padding: 14px 18px;
    font-size: 0.92rem;
    font-weight: 700;
    color: var(--color-primary);
    cursor: pointer;
    list-style: none;
}

.product-detail__spec-group-title::-webkit-details-marker {
    display: none;
}

.product-detail__spec-group .product-detail__specs {
    margin: 0;
    border: none;
    border-top: 1px solid var(--lp-border-light, #eee);
    border-radius: 0;
    background: transparent;
}

@media (max-width: 600px) {
    .product-detail__info {
        padding: 18px 16px 18px;
        border-radius: 14px;
    }

    .product-detail__info-block + .product-detail__info-block {
        margin-top: 16px;
        padding-top: 16px;
    }

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

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

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

    .product-detail__thumb-nav {
        display: none;
    }

    .product-detail__spec-row {
        grid-template-columns: 1fr;
        gap: 2px;
    }

    .product-detail {
        gap: 28px;
    }

    .product-detail__section {
        padding: 22px 18px;
    }
}

/* ── More from this collection ── */
.product-detail__section--related {
    margin: 0;
}

.product-detail__related-head {
    display: flex;
    flex-wrap: wrap;
    align-items: baseline;
    justify-content: space-between;
    gap: 10px 16px;
    margin-bottom: 20px;
}

.product-detail__section--related .product-detail__section-title {
    margin: 0;
}

.product-detail__related-all {
    font-size: 0.84rem;
    font-weight: 600;
    color: var(--color-primary);
    text-decoration: underline;
    text-underline-offset: 3px;
}

.product-detail__related-all:hover {
    color: var(--color-accent);
}

.product-detail__related-grid {
    display: grid;
    grid-template-columns: repeat(4, minmax(0, 1fr));
    gap: 16px;
}

@media (max-width: 1024px) {
    .product-detail__related-grid {
        grid-template-columns: repeat(3, minmax(0, 1fr));
    }
}

@media (max-width: 768px) {
    .product-detail__related-grid {
        grid-template-columns: repeat(2, minmax(0, 1fr));
        gap: 12px;
    }
}