.product-page-main {
    padding: 26px 0 52px;
}

.breadcrumb {
    display: flex;
    gap: 8px;
    align-items: center;
    margin-bottom: 16px;
    color: var(--muted);
    font-size: 0.9rem;
}

.breadcrumb a {
    color: var(--accent-strong);
    font-weight: 800;
    text-decoration: none;
}

.product-page-detail {
    display: grid;
    grid-template-columns: minmax(280px, 0.9fr) minmax(320px, 1.1fr);
    gap: 22px;
    align-items: stretch;
}

.product-page-media,
.product-page-copy,
.product-page-description,
.product-page-related {
    border: 1px solid var(--line);
    border-radius: var(--radius);
    background: var(--surface);
}

.product-page-media {
    display: grid;
    place-items: center;
    padding: 26px;
}

.product-page-media img {
    width: min(520px, 100%);
    aspect-ratio: 1 / 1;
    object-fit: contain;
}

.product-page-copy {
    display: grid;
    align-content: center;
    gap: 16px;
    padding: 28px;
}

.product-page-copy h1 {
    margin-bottom: 0;
    font-size: 2.5rem;
    line-height: 1.06;
    overflow-wrap: anywhere;
}

.product-page-summary {
    margin-bottom: 0;
    color: var(--muted);
}

.product-page-actions {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
}

.product-page-description,
.product-page-related {
    margin-top: 18px;
    padding: 22px;
}

.product-page-description h2,
.product-page-related h2 {
    margin-bottom: 12px;
    font-size: 1.3rem;
}

.product-page-description p {
    max-width: 920px;
    color: #29343b;
    white-space: pre-wrap;
}

.product-page-related-grid {
    display: grid;
    grid-template-columns: repeat(4, minmax(0, 1fr));
    gap: 10px;
}

.product-index-list {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
    gap: 10px;
    padding: 0;
    list-style: none;
}

.product-index-list li {
    display: grid;
    gap: 4px;
    border: 1px solid var(--line);
    border-radius: 8px;
    padding: 12px;
}

.product-index-list a {
    color: var(--ink);
    font-weight: 800;
    text-decoration: none;
}

.product-index-list span {
    color: var(--muted);
    font-size: 0.86rem;
}

@media (max-width: 840px) {
    .product-page-detail,
    .product-page-related-grid {
        grid-template-columns: 1fr;
    }

    .product-page-copy h1 {
        font-size: 1.85rem;
    }
}