/* ============================================
   product.css — 商品详情页（信言方兴新版）
   布局：轻量面包屑 + 卡片化图库/信息双栏 + 居中胶囊锚点 + 卡片分区
   类名沿用 .zh_pd_*（保证 JS 不变），配色藏蓝 + 橙
   ============================================ */

.zh_pd_wrap { max-width: 1280px; margin: 0 auto; padding: 0 20px 56px; }

/* 面包屑条 */
.xy_pd_crumb_bar { background: #fff; border-bottom: 1px solid var(--xy-line); margin-bottom: 26px; }
.xy_pd_crumb { max-width: 1280px; margin: 0 auto; padding: 13px 20px; display: flex; align-items: center; gap: 8px; font-size: 13px; color: var(--xy-text-2); flex-wrap: wrap; }
.xy_pd_crumb a { color: var(--xy-text-2); transition: color .2s; }
.xy_pd_crumb a:hover { color: var(--xy-blue); }
.xy_pd_crumb .sep { color: var(--xy-text-3); }
.xy_pd_crumb .cur { color: var(--xy-navy); font-weight: 600; }

/* ② 主信息双栏 */
.zh_pd_main { display: grid; grid-template-columns: 480px 1fr; gap: 36px; align-items: start; margin-bottom: 34px; }

/* 图库 */
.zh_pd_gallery { position: sticky; top: 92px; }
.zh_pd_bigimg {
    position: relative; background: #fff; border: 1px solid var(--xy-line); border-radius: 18px;
    overflow: hidden; aspect-ratio: 1/1;
}
.zh_pd_bigimg img { width: 100%; height: 100%; object-fit: cover; display: block; }
.zh_pd_tags { position: absolute; top: 14px; left: 14px; display: flex; gap: 8px; z-index: 2; }
.zh_pd_tag { padding: 4px 12px; font-size: 11px; font-weight: 700; letter-spacing: 1px; border-radius: 6px; color: #fff; }
.zh_pd_tag_new { background: var(--xy-blue); }
.zh_pd_tag_hot { background: var(--xy-orange); }
.zh_pd_tag_rec { background: var(--xy-navy); }
.zh_pd_thumbs { display: flex; gap: 10px; margin-top: 14px; flex-wrap: wrap; }
.zh_pd_thumb { width: 70px; height: 70px; border-radius: 10px; overflow: hidden; border: 2px solid var(--xy-line); cursor: pointer; transition: all .18s; }
.zh_pd_thumb img { width: 100%; height: 100%; object-fit: cover; }
.zh_pd_thumb:hover { border-color: var(--xy-blue-soft); }
.zh_pd_thumb.active { border-color: var(--xy-orange); }

/* 信息区 */
.zh_pd_info { min-width: 0; }
.zh_pd_info_head { margin-bottom: 16px; }
.zh_pd_name { font-size: 26px; font-weight: 800; color: var(--xy-navy); line-height: 1.35; }
.zh_pd_subtitle { font-size: 14px; color: var(--xy-text-2); margin-top: 8px; line-height: 1.7; }

/* 价格块 */
.zh_pd_price_box { background: linear-gradient(135deg, #fff6ef 0%, #fff 100%); border: 1px solid var(--xy-orange-tint); border-radius: 14px; padding: 18px 22px; margin-bottom: 16px; }
.zh_pd_price_label { font-size: 12.5px; color: var(--xy-text-3); margin-bottom: 4px; }
.zh_pd_price_row { display: flex; align-items: baseline; gap: 14px; flex-wrap: wrap; }
.zh_pd_price_cur { font-size: 36px; font-weight: 800; color: var(--xy-orange); font-family: "Arial", sans-serif; line-height: 1; }
.zh_pd_price_cur::before { content: '¥'; font-size: 20px; margin-right: 2px; }
.zh_pd_price_old { font-size: 15px; color: var(--xy-text-3); text-decoration: line-through; }
.zh_pd_price_save { font-size: 12.5px; color: #fff; background: var(--xy-orange); padding: 3px 10px; border-radius: 999px; font-weight: 600; }

/* 服务承诺小条 */
.zh_pd_promise_strip { display: flex; flex-wrap: wrap; gap: 8px 20px; padding: 12px 16px; background: var(--xy-bg); border-radius: 10px; margin-bottom: 16px; }
.zh_pd_promise_strip span { display: inline-flex; align-items: center; gap: 6px; font-size: 12.5px; color: var(--xy-text-2); }
.zh_pd_promise_strip i { color: var(--xy-orange); }

/* 销量/浏览 */
.zh_pd_meta { display: flex; flex-wrap: wrap; align-items: center; gap: 8px 18px; margin-bottom: 16px; font-size: 13px; color: var(--xy-text-2); }
.zh_pd_meta i { color: var(--xy-blue); margin-right: 4px; }
.zh_pd_meta strong { color: var(--xy-navy); }
.zh_pd_meta_tag { padding: 3px 10px; border-radius: 6px; font-size: 12px; color: #fff; }
.zh_pd_meta_tag_new { background: var(--xy-blue); }
.zh_pd_meta_tag_hot { background: var(--xy-orange); }

/* 规格选择 */
.zh_pd_specs { border-top: 1px dashed var(--xy-line); padding-top: 16px; margin-bottom: 16px; }
.zh_pd_spec_group { display: flex; align-items: flex-start; gap: 14px; margin-bottom: 14px; }
.zh_pd_spec_label { flex-shrink: 0; width: 56px; font-size: 13px; color: var(--xy-text-3); padding-top: 7px; }
.zh_pd_spec_values { display: flex; flex-wrap: wrap; gap: 10px; }
.zh_pd_spec_btn { padding: 7px 16px; border: 1px solid var(--xy-line); border-radius: 8px; background: #fff; font-size: 13px; color: var(--xy-text); cursor: pointer; transition: all .18s; }
.zh_pd_spec_btn:hover { border-color: var(--xy-blue); color: var(--xy-blue); }
.zh_pd_spec_btn.active { border-color: var(--xy-orange); background: var(--xy-orange-tint); color: var(--xy-orange-deep); font-weight: 600; }
.zh_pd_spec_btn.disabled { opacity: .4; cursor: not-allowed; text-decoration: line-through; }
.zh_pd_spec_tip { font-size: 12.5px; color: var(--xy-text-3); }
.zh_pd_spec_tip i { color: var(--xy-orange); margin-right: 4px; }

/* 属性表 */
.zh_pd_attrs { display: grid; grid-template-columns: 1fr 1fr; gap: 10px 24px; padding: 16px 0; border-top: 1px dashed var(--xy-line); margin-bottom: 18px; }
.zh_pd_attr { display: flex; align-items: center; gap: 10px; font-size: 13px; }
.zh_pd_attr_k { color: var(--xy-text-3); flex-shrink: 0; }
.zh_pd_attr_v { color: var(--xy-navy); }
.zh_pd_attr_v a { color: var(--xy-blue); }
.zh_pd_stock_ok { color: #1c9c5b; }
.zh_pd_stock_out { color: #d24b4b; }

/* 购买操作 */
.zh_pd_buy_row { margin-bottom: 16px; }
.zh_pd_qty_wrap { display: flex; align-items: center; gap: 14px; }
.zh_pd_qty_label { font-size: 13px; color: var(--xy-text-3); }
.zh_pd_actions { display: flex; align-items: stretch; gap: 12px; }
.zh_pd_btn {
    flex: 1; display: inline-flex; align-items: center; justify-content: center; gap: 8px;
    height: 52px; border: none; border-radius: 999px; font-size: 16px; font-weight: 700; cursor: pointer; transition: all .22s;
}
.zh_pd_btn_cart { background: var(--xy-navy); color: #fff; }
.zh_pd_btn_cart:hover { background: var(--xy-blue); transform: translateY(-2px); }
.zh_pd_btn_buy { background: var(--xy-grad-orange); color: #fff; box-shadow: 0 8px 20px rgba(255,122,24,.3); }
.zh_pd_btn_buy:hover { color: #fff; transform: translateY(-2px); box-shadow: 0 12px 26px rgba(255,122,24,.42); }
.zh_pd_btn:disabled, .zh_pd_btn_disabled { opacity: .55; cursor: not-allowed; box-shadow: none; transform: none; }
.zh_pd_btn_fav { flex-shrink: 0; width: 52px; height: 52px; border: 1px solid var(--xy-line); border-radius: 50%; background: #fff; color: var(--xy-text-3); font-size: 18px; cursor: pointer; transition: all .2s; }
.zh_pd_btn_fav:hover, .zh_pd_btn_fav.active { border-color: var(--xy-orange); color: var(--xy-orange); }

/* 所属商家小卡 */
.zh_pd_merchant_inline { display: flex; align-items: center; gap: 14px; margin-top: 18px; padding: 14px 18px; background: var(--xy-bg); border-radius: 14px; transition: all .2s; }
.zh_pd_merchant_inline:hover { background: var(--xy-blue-tint); }
.zh_pd_merchant_inline_logo { width: 48px; height: 48px; border-radius: 50%; overflow: hidden; background: #fff; border: 1px solid var(--xy-line); display: inline-flex; align-items: center; justify-content: center; font-weight: 700; color: var(--xy-blue); flex-shrink: 0; }
.zh_pd_merchant_inline_logo img { width: 100%; height: 100%; object-fit: cover; }
.zh_pd_merchant_inline_text { flex: 1; min-width: 0; }
.zh_pd_merchant_inline_name { font-size: 15px; font-weight: 700; color: var(--xy-navy); display: flex; align-items: center; gap: 8px; }
.zh_pd_merchant_inline_count { font-size: 12.5px; color: var(--xy-text-3); margin-top: 2px; }
.zh_pd_merchant_inline_count i { color: var(--xy-blue); margin-right: 4px; }
.zh_pd_merchant_inline_more { font-size: 13px; color: var(--xy-blue); font-weight: 600; flex-shrink: 0; }
.zh_pd_merchant_tag { font-size: 11px; color: var(--xy-orange); font-weight: 600; }
.zh_pd_merchant_tag i { margin-right: 2px; }

/* ③ 居中胶囊锚点 sticky */
.zh_pd_anchor { position: sticky; top: 74px; z-index: 50; display: flex; justify-content: center; gap: 8px; padding: 10px; background: rgba(255,255,255,.92); backdrop-filter: blur(8px); border: 1px solid var(--xy-line); border-radius: 999px; margin: 0 auto 28px; max-width: 560px; }
.zh_pd_anchor a { padding: 8px 20px; border-radius: 999px; font-size: 14px; color: var(--xy-text-2); transition: all .2s; }
.zh_pd_anchor a:hover { color: var(--xy-blue); }
.zh_pd_anchor a.active { background: var(--xy-grad-navy); color: #fff; font-weight: 600; }

/* 分区卡 */
.zh_pd_section { background: #fff; border: 1px solid var(--xy-line); border-radius: 18px; padding: 28px 30px; margin-bottom: 22px; }
.zh_pd_section_title { font-size: 20px; font-weight: 800; color: var(--xy-navy); margin-bottom: 20px; padding-left: 14px; position: relative; }
.zh_pd_section_title::before { content: ''; position: absolute; left: 0; top: 2px; bottom: 2px; width: 4px; border-radius: 4px; background: var(--xy-grad-orange); }
.zh_pd_section_title small { font-size: 12px; letter-spacing: 2px; color: var(--xy-text-3); font-weight: 500; margin-left: 8px; }

/* 富文本内容 */
.zh_pd_content_body { font-size: 14.5px; color: var(--xy-text); line-height: 1.9; }
.zh_pd_content_body img { max-width: 100%; height: auto; border-radius: 10px; margin: 10px 0; }
.zh_pd_content_body p { margin-bottom: 12px; }
.zh_pd_content_empty { text-align: center; padding: 50px 20px; color: var(--xy-text-3); }
.zh_pd_content_empty i { font-size: 42px; color: var(--xy-line); margin-bottom: 12px; }

/* 商家信息 */
.zh_pd_mch_grid { display: flex; gap: 24px; align-items: flex-start; }
.zh_pd_mch_logo_big { width: 90px; height: 90px; border-radius: 16px; overflow: hidden; background: var(--xy-bg); border: 1px solid var(--xy-line); display: inline-flex; align-items: center; justify-content: center; font-size: 34px; font-weight: 800; color: var(--xy-blue); flex-shrink: 0; }
.zh_pd_mch_logo_big img { width: 100%; height: 100%; object-fit: cover; }
.zh_pd_mch_body { flex: 1; min-width: 0; }
.zh_pd_mch_name { font-size: 19px; font-weight: 800; color: var(--xy-navy); display: flex; align-items: center; gap: 10px; margin-bottom: 14px; flex-wrap: wrap; }
.zh_pd_mch_info_grid { display: grid; grid-template-columns: 1fr 1fr; gap: 8px 24px; margin-bottom: 14px; }
.zh_pd_mch_info_item { font-size: 13px; color: var(--xy-text-2); }
.zh_pd_mch_info_item i { color: var(--xy-blue); width: 16px; margin-right: 6px; }
.zh_pd_mch_info_item strong { color: var(--xy-navy); font-weight: 600; }
.zh_pd_mch_desc { font-size: 13.5px; color: var(--xy-text-2); line-height: 1.8; padding: 14px 16px; background: var(--xy-bg); border-radius: 10px; margin-bottom: 16px; }
.zh_pd_mch_btns { display: flex; gap: 12px; flex-wrap: wrap; }
.zh_pd_mch_btn { display: inline-flex; align-items: center; gap: 8px; padding: 10px 22px; border-radius: 999px; font-size: 14px; font-weight: 600; border: 1px solid var(--xy-line); color: var(--xy-navy); transition: all .2s; }
.zh_pd_mch_btn:hover { border-color: var(--xy-blue); color: var(--xy-blue); }
.zh_pd_mch_btn_main { background: var(--xy-grad-navy); color: #fff; border-color: transparent; }
.zh_pd_mch_btn_main:hover { color: #fff; transform: translateY(-2px); }

/* 服务保障 */
.zh_pd_promise_grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 18px; }
.zh_pd_promise_card { padding: 24px 20px; border-radius: 14px; text-align: center; border: 1px solid var(--xy-line); transition: all .25s; }
.zh_pd_promise_card:hover { transform: translateY(-4px); box-shadow: 0 14px 30px rgba(18,43,82,.1); }
.zh_pd_promise_icon { width: 54px; height: 54px; border-radius: 14px; margin: 0 auto 14px; display: flex; align-items: center; justify-content: center; font-size: 24px; }
.zh_pd_promise_card_orange .zh_pd_promise_icon { background: var(--xy-orange-tint); color: var(--xy-orange); }
.zh_pd_promise_card_blue .zh_pd_promise_icon { background: var(--xy-blue-tint); color: var(--xy-blue); }
.zh_pd_promise_card h3 { font-size: 15px; font-weight: 700; color: var(--xy-navy); margin-bottom: 8px; }
.zh_pd_promise_card p { font-size: 12.5px; color: var(--xy-text-2); line-height: 1.7; }

/* 相关推荐 */
.zh_pd_related_grid { display: grid; grid-template-columns: repeat(5, 1fr); gap: 18px; }

@media (max-width: 1199px) {
    .zh_pd_main { grid-template-columns: 400px 1fr; gap: 28px; }
    .zh_pd_promise_grid { grid-template-columns: repeat(2, 1fr); }
    .zh_pd_related_grid { grid-template-columns: repeat(4, 1fr); }
}
@media (max-width: 991px) {
    .zh_pd_main { grid-template-columns: 1fr; }
    .zh_pd_gallery { position: static; max-width: 480px; }
    .zh_pd_related_grid { grid-template-columns: repeat(3, 1fr); }
}
@media (max-width: 767px) {
    .zh_pd_wrap { padding: 0 12px 40px; }
    .zh_pd_name { font-size: 21px; }
    .zh_pd_price_cur { font-size: 30px; }
    .zh_pd_attrs { grid-template-columns: 1fr; }
    .zh_pd_mch_grid { flex-direction: column; }
    .zh_pd_mch_info_grid { grid-template-columns: 1fr; }
    .zh_pd_section { padding: 20px 18px; }
    .zh_pd_anchor { gap: 2px; padding: 8px; }
    .zh_pd_anchor a { padding: 7px 12px; font-size: 13px; }
    .zh_pd_related_grid { grid-template-columns: repeat(2, 1fr); gap: 12px; }
    .zh_pd_actions { flex-wrap: wrap; }
    .zh_pd_btn { font-size: 15px; }
}