/* base.css — 商品详情页（对标淘宝商品详情：左图集 / 右信息栏） kpbd20260919a */
:root {
  --kpb-blue: #1677FF;
  --kpb-blue-d: #0E5FD8;
  --kpb-ink: #0F172A;
  --kpb-sub: #5B6B85;
  --kpb-mut: #86909C;
  --kpb-line: #E6EAF2;
  --kpb-bg: #F4F6FA;
  --kpb-card: #FFFFFF;
  --kpb-r: 14px;
  --kpb-red: #FF4D4F;
  --kpb-red-bg: #FFF1F0;
  --kpb-shadow: 0 2px 10px rgba(15, 23, 42, .05);
  --kpb-shadow-h: 0 16px 40px rgba(15, 23, 42, .12);
}
* { box-sizing: border-box; }
[hidden] { display: none !important; }
html body.kpb-body { margin: 0; background: var(--kpb-bg); color: var(--kpb-ink);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Microsoft YaHei", Roboto, Helvetica, Arial, sans-serif;
  -webkit-text-size-adjust: 100%; }
html body .kpb-wrap { width: 100%; max-width: 1240px; margin: 0 auto; padding: 0 24px; box-sizing: border-box; }

/* 面包屑 */
.kpbd-crumb { background: #fff; border-bottom: 1px solid var(--kpb-line); padding: 12px 0; }
.kpbd-crumb a { color: var(--kpb-sub); text-decoration: none; font-size: 13px; }
.kpbd-crumb a:hover { color: var(--kpb-blue); }
.kpbd-crumb__sep { color: var(--kpb-mut); margin: 0 8px; }

/* 主体两栏 */
.kpbd { padding: 20px 24px 8px; display: flex; flex-direction: column; gap: 18px; }
.kpbd-top { display: grid; grid-template-columns: minmax(360px, 480px) 1fr; gap: 36px; background: var(--kpb-card);
  border: 1px solid var(--kpb-line); border-radius: var(--kpb-r); box-shadow: var(--kpb-shadow); padding: 24px; }

/* 左：图集 */
.kpbd-gallery { min-width: 0; }
.kpbd-stage { position: relative; width: 100%; aspect-ratio: 1 / 1; background: #F0F2F6; border-radius: 12px; overflow: hidden; }
.kpbd-stage img { width: 100%; height: 100%; object-fit: contain; display: block; cursor: zoom-in; }
.kpbd-stage__zoom { position: absolute; right: 12px; bottom: 12px; width: 38px; height: 38px; border: none; border-radius: 50%;
  background: rgba(15,23,42,.6); color: #fff; font-size: 16px; cursor: pointer; }
.kpbd-thumbs { display: flex; flex-wrap: wrap; gap: 10px; margin-top: 12px; }
.kpbd-thumb { width: 64px; height: 64px; border: 2px solid transparent; border-radius: 8px; overflow: hidden; cursor: pointer;
  background: #F0F2F6; padding: 0; }
.kpbd-thumb img { width: 100%; height: 100%; object-fit: contain; display: block; }
.kpbd-thumb.is-active { border-color: var(--kpb-blue); }

/* 右：信息栏 */
.kpbd-info { min-width: 0; display: flex; flex-direction: column; }
.kpbd-title { font-size: 24px; line-height: 1.3; margin: 0 0 8px; font-weight: 700; letter-spacing: -.3px; }
.kpbd-brief { font-size: 15px; color: var(--kpb-sub); margin: 0 0 16px; line-height: 1.6; }
.kpbd-price { display: flex; align-items: baseline; gap: 10px; background: var(--kpb-red-bg); border-radius: 10px; padding: 14px 16px; margin-bottom: 14px; }
.kpbd-price__cur { color: var(--kpb-red); font-size: 16px; font-weight: 600; }
.kpbd-price__cur b { font-size: 30px; font-weight: 800; letter-spacing: -1px; }
.kpbd-price__unit { color: var(--kpb-red); font-size: 13px; }
.kpbd-price__note { color: var(--kpb-mut); font-size: 13px; margin-left: auto; }
.kpbd-service { display: flex; flex-wrap: wrap; gap: 8px; margin-bottom: 18px; }
.kpbd-service span { font-size: 12px; color: var(--kpb-blue-d); background: #EEF4FF; border: 1px solid #D6E4FF;
  padding: 4px 10px; border-radius: 100px; }

/* 规格行 */
.kpbd-spec { border-top: 1px dashed var(--kpb-line); padding-top: 14px; display: flex; flex-direction: column; gap: 14px; }
.kpbd-spec__row { display: flex; gap: 14px; align-items: flex-start; }
.kpbd-spec__lbl { flex: 0 0 76px; color: var(--kpb-mut); font-size: 13px; line-height: 32px; }
.kpbd-spec__val { font-size: 14px; color: var(--kpb-ink); line-height: 1.6; padding-top: 5px; }
.kpbd-swatches { display: flex; flex-wrap: wrap; gap: 8px; }
.kpbd-sw { width: 30px; height: 30px; border-radius: 50%; border: 2px solid #fff; box-shadow: 0 0 0 1px var(--kpb-line); cursor: pointer; position: relative; }
.kpbd-sw.is-active { box-shadow: 0 0 0 2px var(--kpb-blue); }
.kpbd-sw__name { font-size: 12px; color: var(--kpb-sub); margin-left: 6px; vertical-align: middle; }
.kpbd-sizes, .kpbd-genders { display: flex; flex-wrap: wrap; gap: 8px; }
.kpbd-pill { min-width: 44px; text-align: center; padding: 6px 12px; border: 1px solid var(--kpb-line); border-radius: 8px;
  background: #fff; color: var(--kpb-sub); font-size: 13px; cursor: pointer; transition: .14s; }
.kpbd-pill:hover { border-color: #BBD3FF; color: var(--kpb-blue); }
.kpbd-pill.is-active { background: var(--kpb-blue); border-color: var(--kpb-blue); color: #fff; font-weight: 600; }

/* CTA */
.kpbd-cta { display: flex; flex-wrap: wrap; gap: 12px; margin-top: 22px; }
.kpbd-btn { display: inline-flex; align-items: center; justify-content: center; height: 50px; padding: 0 28px; border-radius: 10px;
  font-size: 16px; font-weight: 700; text-decoration: none; cursor: pointer; border: 1px solid transparent; transition: .16s; }
.kpbd-btn--primary { background: linear-gradient(135deg, #1677FF, #0E5FD8); color: #fff; box-shadow: 0 8px 18px rgba(22,119,255,.28); }
.kpbd-btn--primary:hover { filter: brightness(1.05); transform: translateY(-1px); }
.kpbd-btn--ghost { background: #fff; color: var(--kpb-blue); border-color: #BBD3FF; }
.kpbd-btn--ghost:hover { background: #EEF4FF; }
.kpbd-btn--share { background: #fff; color: var(--kpb-sub); border-color: var(--kpb-line); }
.kpbd-btn--share:hover { border-color: var(--kpb-blue); color: var(--kpb-blue); }
.kpbd-tip { font-size: 12px; color: var(--kpb-mut); line-height: 1.6; margin: 16px 0 0; }

/* 空态 */
.kpbd-empty { background: #fff; border: 1px solid var(--kpb-line); border-radius: var(--kpb-r); padding: 48px 24px; text-align: center; }
.kpbd-empty p { color: var(--kpb-sub); margin: 0 0 18px; }

/* Tabs */
.kpbd-tabs { display: flex; gap: 6px; background: var(--kpb-card); border: 1px solid var(--kpb-line); border-radius: var(--kpb-r) var(--kpb-r) 0 0;
  padding: 6px 8px 0; box-shadow: var(--kpb-shadow); }
.kpbd-tabs button { border: none; background: transparent; padding: 14px 22px; font-size: 15px; color: var(--kpb-sub); cursor: pointer;
  border-bottom: 2px solid transparent; font-weight: 600; }
.kpbd-tabs button.is-active { color: var(--kpb-blue); border-bottom-color: var(--kpb-blue); }
.kpbd-panel { background: var(--kpb-card); border: 1px solid var(--kpb-line); border-top: none; border-radius: 0 0 var(--kpb-r) var(--kpb-r);
  box-shadow: var(--kpb-shadow); padding: 24px; min-height: 120px; }
.kpbd-panel img { max-width: 100%; border-radius: 8px; display: block; margin: 0 auto; }
.kpbd-params { display: grid; grid-template-columns: repeat(2, 1fr); gap: 0 32px; }
.kpbd-params dl { margin: 0; display: flex; border-bottom: 1px dashed var(--kpb-line); padding: 10px 0; }
.kpbd-params dt { flex: 0 0 110px; color: var(--kpb-mut); font-size: 13px; }
.kpbd-params dd { margin: 0; font-size: 14px; color: var(--kpb-ink); }
.kpbd-size-tbl { width: 100%; border-collapse: collapse; font-size: 13px; }
.kpbd-size-tbl th, .kpbd-size-tbl td { border: 1px solid var(--kpb-line); padding: 8px 10px; text-align: center; }
.kpbd-size-tbl th { background: #F7F9FC; color: var(--kpb-sub); font-weight: 600; }

/* 放大层 */
.kpbd-lb { position: fixed; inset: 0; background: rgba(15,23,42,.86); display: flex; align-items: center; justify-content: center; z-index: 9999; }
.kpbd-lb img { max-width: 90vw; max-height: 90vh; object-fit: contain; border-radius: 8px; }
.kpbd-lb__x { position: absolute; top: 18px; right: 22px; width: 44px; height: 44px; border: none; border-radius: 50%;
  background: rgba(255,255,255,.16); color: #fff; font-size: 22px; cursor: pointer; }

/* 移动端：淘宝式纵向堆叠 */
@media (max-width: 768px) {
  html body .kpb-wrap { padding: 0 14px; }
  .kpbd { padding: 14px 14px 8px; gap: 14px; }
  .kpbd-top { grid-template-columns: 1fr; gap: 18px; padding: 16px; }
  .kpbd-stage { aspect-ratio: 1 / 1; }
  .kpbd-title { font-size: 19px; }
  .kpbd-price__cur b { font-size: 26px; }
  .kpbd-cta { gap: 10px; }
  .kpbd-btn { flex: 1 1 100%; height: 46px; }
  .kpbd-btn--ghost, .kpbd-btn--share { flex: 1 1 auto; }
  .kpbd-params { grid-template-columns: 1fr; }
  .kpbd-tabs button { padding: 12px 14px; font-size: 14px; }
  .kpbd-panel { padding: 16px; }
}
@media (max-width: 380px) {
  .kpbd-spec__lbl { flex-basis: 64px; }
}

/* ============================================================
   页脚（科技感） kpb-foot  2026-09-20
   注：版型大全页 bases.css 另有一套同名 .kpb-foot（白底居中小字），
   两页各加载各的 css，互不影响；改详情页 footer 只动这里。
   ============================================================ */
.kpb-foot {
  position: relative;
  margin-top: 34px;
  padding: 34px 0 30px;
  background:
    radial-gradient(120% 140% at 50% 0%, rgba(22,119,255,.06), rgba(22,119,255,0) 55%),
    #FFFFFF;
  border-top: 1px solid transparent;
  -webkit-border-image: none;
}
.kpb-foot::before {
  content: '';
  position: absolute; top: -1px; left: 0; right: 0; height: 1px;
  background: linear-gradient(90deg, rgba(22,119,255,0) 4%, rgba(22,119,255,.45) 50%, rgba(22,119,255,0) 96%);
}
.kpb-foot .kpb-wrap { text-align: center; }
.kpb-foot__brand {
  font-size: 21px; font-weight: 800; letter-spacing: .5px; line-height: 1;
  color: var(--kpb-ink);
  background: linear-gradient(100deg, #0F172A 20%, var(--kpb-blue) 70%, #4096FF);
  -webkit-background-clip: text; background-clip: text;
  -webkit-text-fill-color: transparent; color: var(--kpb-blue);
}
.kpb-foot__brand span { font-weight: 700; }
.kpb-foot__flow {
  margin-top: 12px; color: var(--kpb-mut); font-size: 13px; letter-spacing: .3px;
}
.kpb-foot__nav { margin-top: 18px; display: flex; flex-wrap: wrap; gap: 10px 12px; justify-content: center; }
.kpb-foot__nav a {
  display: inline-flex; align-items: center; height: 34px; padding: 0 18px;
  border: 1px solid var(--kpb-line); border-radius: 999px;
  background: var(--kpb-card); color: var(--kpb-sub);
  font-size: 13.5px; text-decoration: none; letter-spacing: .2px;
  transition: color .18s ease, border-color .18s ease, box-shadow .18s ease, transform .18s ease;
}
.kpb-foot__nav a:hover {
  color: var(--kpb-blue); border-color: rgba(22,119,255,.55);
  box-shadow: 0 4px 14px rgba(22,119,255,.16); transform: translateY(-1px);
}
.kpb-foot__copy { margin-top: 20px; color: #A8B3C5; font-size: 12px; letter-spacing: .4px; }
@media (max-width: 768px) {
  .kpb-foot { margin-top: 22px; padding: 26px 0 24px; }
  .kpb-foot__brand { font-size: 19px; }
  .kpb-foot__flow { font-size: 13px; padding: 0 6px; }
  .kpb-foot__nav a { height: 36px; padding: 0 16px; font-size: 14px; }
}