body.bg-body {
    --bg-page: #fafbfe;
    --bg-surface: #ffffff;
    --bg-fg: #313a46;
    --bg-muted: #98a6ad;
    --bg-link: #919ca7;
    --bg-border: #eef2f7;
    --bg-primary: #3688fc;
    --bg-primary-2: #3369ff;
    --bg-primary-3: #3798f7;
    --bg-danger: #fa6767;
    --bg-price: #d0021b;
    --bg-radius: 5px;
    --bg-font: "Nunito", "PingFang SC", "Microsoft YaHei", system-ui, sans-serif;
    background: var(--bg-page);
    color: var(--bg-fg);
    font-family: var(--bg-font);
    font-size: .9rem;
}
body.bg-body::before { background: var(--bg-page); }
body.bg-body main { max-width: 1320px; padding: 1.2rem 1rem 4rem; }

/* ---- navbar ---- */
body.bg-body header, .bg-nav {
    background: var(--bg-surface);
    box-shadow: 0 0 35px 0 rgba(154, 161, 171, .15);
    min-height: 70px; display: flex; align-items: center;
}
.bg-nav-inner {
    max-width: 1320px; margin: 0 auto; padding: .6rem 1rem; width: 100%;
    display: flex; align-items: center; gap: 1rem; flex-wrap: wrap;
}
.bg-logo { display: flex; align-items: center; gap: 10px; color: #000; }
.bg-logo-mark {
    width: 46px; height: 46px; flex: none;
    display: grid; place-items: center;
    border-radius: 10px; background: #eaf2ff;
}
.bg-logo-mark img { width: 34px; height: 34px; border-radius: 6px; object-fit: contain; }
.bg-logo-title { font-size: 24px; font-weight: 700; color: #000; letter-spacing: .5px; }
.bg-nav-menu { display: flex; align-items: center; gap: .1rem; margin-left: auto; flex-wrap: wrap; }
.bg-nav-menu a, .bg-nav-menu span {
    font-size: .84rem; font-weight: 600; color: var(--bg-muted);
    padding: .4rem .7rem; border-radius: var(--bg-radius); white-space: nowrap;
    display: inline-flex; align-items: center; gap: .3rem;
}
.bg-nav-menu a:hover { color: var(--bg-primary); }

/* ---- page title box + search + notice ---- */
.bg-titlebar {
    display: flex; align-items: center; justify-content: space-between; gap: 1rem;
    flex-wrap: wrap; min-height: 52px; margin: .6rem 0 1rem;
}
.bg-titlebar h1 { font-size: 18px; font-weight: 700; color: var(--bg-fg); }
.bg-tools { display: flex; align-items: center; gap: .6rem; margin-left: auto; }
.bg-search { position: relative; }
.bg-search input {
    padding: .5rem .9rem .5rem 2.1rem; font-size: .86rem; width: 320px; max-width: 60vw;
    border: 1px solid var(--bg-border); border-radius: var(--bg-radius);
    background: #f4f6fb; color: var(--bg-fg); outline: 0;
}
.bg-search input:focus { border-color: var(--bg-primary); box-shadow: 0 0 0 3px rgba(54,136,252,.15); }
.bg-search span { position: absolute; left: .6rem; top: 50%; transform: translateY(-50%); color: var(--bg-muted); font-size: .8rem; }
.bg-btn {
    display: inline-flex; align-items: center; gap: .35rem; cursor: pointer;
    font-size: .82rem; font-weight: 600; padding: .44rem .95rem; border-radius: var(--bg-radius);
    border: 1px solid var(--bg-primary); color: var(--bg-primary); background: var(--bg-surface);
}
.bg-btn:hover { background: var(--bg-primary); color: #fff; }
.bg-notice {
    background: var(--bg-surface); border: 1px solid var(--bg-border);
    border-radius: var(--bg-radius); padding: .85rem 1.1rem; margin-bottom: 1.1rem;
    box-shadow: 0 0 35px 0 rgba(154, 161, 171, .08);
}
.bg-notice-item {
    font-size: .86rem; color: var(--bg-fg); line-height: 1.7;
    padding: .5rem .75rem; border-radius: var(--bg-radius);
    background: #eef2ff; border-left: 3px solid var(--bg-primary);
}
.bg-notice-item + .bg-notice-item { margin-top: .5rem; }
.bg-notice-item.yellow { background: #fffbeb; border-left-color: #f59e0b; color: #92400e; }
.bg-notice-item.red    { background: #fff1f2; border-left-color: var(--bg-danger); color: #9f1239; }
.bg-notice-item.blue   { background: #eef2ff; border-left-color: #6366f1; color: #3730a3; }

/* ---- category tab bar (.nav-list .tab-link + checkmark) ---- */
body.bg-body .categories {
    display: flex; flex-wrap: wrap; gap: 6px; margin-bottom: 12px;
}
body.bg-body .category-btn {
    position: relative; overflow: hidden;
    min-width: 100px; text-align: center;
    font-size: 1rem; padding: 6px 12px; border-radius: .5rem;
    border: 1px solid var(--bg-primary); background: var(--bg-surface); color: var(--bg-fg);
    font-weight: 600;
}
body.bg-body .category-btn.active {
    color: #fff;
    background: linear-gradient(-45deg, var(--bg-primary-2), var(--bg-primary-3));
}
body.bg-body .category-btn.active::after {
    content: "✓"; position: absolute; right: 4px; bottom: -2px;
    font-size: 20px; opacity: .8; color: #fff;
}
@media (max-width: 767px) { body.bg-body .category-btn { min-width: 64px; font-size: .9rem; } }

/* ---- product grid + home-card ---- */
body.bg-body .product-grid {
    display: grid; gap: 12px;
    grid-template-columns: repeat(2, minmax(0, 1fr));
}
@media (min-width: 768px)  { body.bg-body .product-grid { grid-template-columns: repeat(3, minmax(0, 1fr)); } }
@media (min-width: 992px)  { body.bg-body .product-grid { grid-template-columns: repeat(4, minmax(0, 1fr)); } }
@media (min-width: 1320px) { body.bg-body .product-grid { grid-template-columns: repeat(5, minmax(0, 1fr)); } }

body.bg-body .product-card {
    display: flex; flex-direction: column; align-items: center;
    background: var(--bg-surface); border-radius: var(--bg-radius);
    padding: 32px 20px 16px;
    box-shadow: 0 3px 6px 0 rgba(0, 0, 0, .12);
    transition: box-shadow .5s;
}
body.bg-body .product-card:hover { box-shadow: 1px 3px 10px 0 rgba(54, 136, 252, .28); }
.bg-card-media { width: 88%; margin: 0 auto; }
.bg-card-media img { width: 100%; aspect-ratio: 4 / 3; object-fit: contain; border-radius: 4px; }
.bg-card-body { margin-top: 14px; width: 100%; display: flex; flex-direction: column; align-items: center; gap: .55rem; }
.bg-card-name {
    font-size: 16px; font-weight: 600; color: var(--bg-fg); text-align: center; line-height: 1.4;
    min-height: 44px;
    display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden;
}
.bg-card-price { color: var(--bg-price); text-align: center; font-weight: 700; font-size: 15px; }
.bg-card-price b { font-size: 24px; }
.bg-card-soldout { font-size: .72rem; font-weight: 700; color: var(--bg-danger); }

/* ---- breadcrumb / page title ---- */
.bg-crumbs { font-size: .82rem; color: var(--bg-muted); margin-bottom: 1rem; display: flex; gap: .35rem; flex-wrap: wrap; }
.bg-crumbs a:hover { color: var(--bg-primary); }
.bg-pagetitle { font-size: 18px; font-weight: 700; line-height: 2.6; margin-bottom: .6rem; color: var(--bg-fg); }

/* ---- detail page reskin → Hyper buy-grid (复用 classic detail 视图) ---- */
body.bg-body .back-link { display: none; }
body.bg-body .detail-container,
body.bg-body .detail-content-card,
body.bg-body .faq-section,
body.bg-body .query-box,
body.bg-body .auth-card,
body.bg-body .success-card,
body.bg-body .pay-card {
    background: var(--bg-surface); border: none; border-radius: var(--bg-radius);
    box-shadow: 0 0 35px 0 rgba(154, 161, 171, .16);
}
body.bg-body .detail-title { color: var(--bg-fg); font-weight: 700; font-size: 1.35rem; }
body.bg-body .detail-price-box { background: transparent; border: 0; padding: .4rem 0 .8rem; }
body.bg-body .detail-price { color: var(--bg-price); font-size: 1.8rem; font-weight: 700; }
body.bg-body .detail-stats { gap: .4rem; }
body.bg-body .detail-stats span {
    background: transparent; border: 1px solid var(--bg-primary); color: var(--bg-primary);
    border-radius: 4px; padding: .12rem .5rem; font-size: .74rem; font-weight: 700;
}
body.bg-body .detail-stats span:first-child { border-color: var(--bg-danger); color: var(--bg-danger); }
body.bg-body .detail-stats strong { font-weight: 700; }
body.bg-body .submit-btn {
    background: var(--bg-danger); border-radius: var(--bg-radius);
    display: block; width: fit-content; min-width: 180px;
    margin: .6rem auto 0; padding-left: 2.2rem; padding-right: 2.2rem;
}
body.bg-body .submit-btn:hover { filter: brightness(.94); }
body.bg-body .tab-nav-btn.active { color: var(--bg-primary); border-bottom-color: var(--bg-primary); }
body.bg-body .chain-option-body { border-width: 2px; border-color: #bdcfe1; }
body.bg-body .chain-option input:checked + .chain-option-body { border-color: var(--bg-primary); color: var(--bg-primary); box-shadow: none; }
body.bg-body .faq-card { background: var(--bg-page); border: 1px solid var(--bg-border); border-radius: var(--bg-radius); }


body.bg-body .qty-picker .qty-btn {
    background: var(--bg-primary); color: #fff; border: none; border-radius: var(--bg-radius);
    width: 40px; height: 38px; font-size: 1.1rem;
}
body.bg-body .qty-picker input { border-color: var(--bg-border); }

@media (min-width: 992px) {
  
    body.bg-body main.bg-detail {
        display: grid; grid-template-columns: minmax(0, 4fr) minmax(0, 2.5fr);
        gap: 12px; align-items: start;
    }
    body.bg-body main.bg-detail .detail-content-card {
        grid-column: 1; grid-row: 1; margin: 0;
    }
    body.bg-body main.bg-detail .detail-container {
        grid-column: 2; grid-row: 1;
        display: flex; flex-direction: column; gap: 1rem; padding: 1.1rem;
        position: sticky; top: 12px;
    }
    body.bg-body main.bg-detail .detail-img-wrap { aspect-ratio: 16 / 10; }
    body.bg-body main.bg-detail .faq-section { grid-column: 1 / -1; grid-row: 2; }
}

/* ---- footer ---- */
body.bg-body { display: flex; flex-direction: column; min-height: 100vh; }
body.bg-body > * { width: 100%; }
body.bg-body .site-footer, .bg-footer {
    max-width: none; width: 100%; margin: 3rem 0 0;
    background: var(--bg-surface);
    border-top: 1px solid rgba(152, 166, 173, .2); color: var(--bg-muted);
    padding: 20px 1rem;
}
body.bg-body > .site-footer { margin-top: auto; }
.bg-footer-inner { max-width: 1320px; margin: 0 auto; text-align: center; line-height: 1.9; }
.bg-footer-nav { display: flex; flex-wrap: wrap; gap: .3rem .9rem; justify-content: center; margin-bottom: .6rem; }
.bg-footer-nav a { font-size: .82rem; font-weight: 600; color: var(--bg-link); }
.bg-footer-nav a:hover { color: var(--bg-primary); }
.bg-footer-meta { font-size: .78rem; }
body.bg-body .footer-ticker { text-align: center; margin-bottom: .6rem; color: var(--bg-muted); }

@media (max-width: 720px) { .bg-search input { width: 100%; } }