/* ============================================================
   theme.css —— WordPress 专属样式（页头带、面包屑、列表卡片、
   文章/产品详情、分页、分类筛选、搜索表单、二级下拉菜单等）
   基础与版块样式见 styles.css / sections.css
   ============================================================ */

/* 二级下拉（Products 大菜单：5 列 × 子分类） */
.mega {
  left: 0;
  right: auto;
  width: min(1180px, 92vw);
  display: grid;
  grid-template-columns: repeat(5, minmax(0, 1fr));
  gap: 18px 22px;
  padding: 22px 24px;
}
.mega-col { min-width: 0; }
.mega-head {
  display: block;
  font-size: 14px;
  font-weight: 700;
  color: var(--heading);
  margin-bottom: 8px;
  border-bottom: 1px solid var(--line);
  padding-bottom: 6px;
}
.mega-head:hover { color: var(--primary); }
.mega-sub { display: flex; flex-direction: column; gap: 6px; }
.mega-link { font-size: 13px; color: var(--body); line-height: 1.45; }
.mega-link:hover { color: var(--primary); }

/* 抽屉子菜单 */
.drawer-sub { padding: 6px 0 10px 12px; display: flex; flex-direction: column; gap: 8px; }
.drawer-cat { font-size: 14px; font-weight: 700; color: var(--heading); }
.drawer-sub-link { font-size: 13px; color: var(--body); }

body.drawer-open { overflow: hidden; }

/* 页头带 + 面包屑 */
.kjn-page-hero {
  background: linear-gradient(120deg, var(--primary-deep) 0%, var(--primary) 100%);
  color: #fff;
  padding: 74px 0 58px;
}
.kjn-page-hero h1 { margin: 0; font-size: 34px; font-weight: 800; line-height: 1.25; }
.kjn-page-hero p { margin: 10px 0 0; color: rgba(255, 255, 255, 0.85); font-size: 15px; }
.kjn-crumbs {
  background: #f6f8fb;
  border-bottom: 1px solid var(--line);
  font-size: 13px;
  color: var(--body);
  padding: 12px 0;
}
.kjn-crumbs a { color: var(--body); }
.kjn-crumbs a:hover { color: var(--primary); }
.kjn-crumbs span { margin: 0 4px; }

/* 列表卡片 */
.kjn-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 30px;
}
.kjn-post-card {
  background: #fff;
  border: 1px solid var(--line);
  display: flex;
  flex-direction: column;
  transition: box-shadow var(--dur) ease, transform var(--dur) ease;
}
.kjn-post-card:hover { box-shadow: 0 14px 30px rgba(18, 18, 18, 0.08); transform: translateY(-3px); }
.kjn-post-thumb { display: block; aspect-ratio: 4 / 3; overflow: hidden; background: #eef1f6; }
.kjn-post-thumb img { width: 100%; height: 100%; object-fit: cover; }
.kjn-post-body { padding: 20px 22px 24px; display: flex; flex-direction: column; gap: 10px; flex: 1; }
.kjn-post-body h3 { margin: 0; font-size: 18px; line-height: 1.4; }
.kjn-post-body h3 a { color: var(--heading); }
.kjn-post-body h3 a:hover { color: var(--primary); }
.kjn-post-body p { margin: 0; font-size: 14px; color: var(--body); line-height: 1.7; }
.kjn-post-body .text-link { margin-top: auto; }
.kjn-meta { margin: 0; font-size: 12px; color: #999; letter-spacing: 0.02em; }
.kjn-thumb-ph { display: block; width: 100%; height: 100%; background: linear-gradient(135deg, #eef2f8, #dfe6f1); }
.kjn-thumb-ph.lg { aspect-ratio: 4 / 3; }
.kjn-empty { color: var(--body); }

/* 分页 */
.kjn-pagination { margin-top: 46px; }
.kjn-pagination ul { list-style: none; margin: 0; padding: 0; display: flex; gap: 8px; justify-content: center; flex-wrap: wrap; }
.kjn-pagination a,
.kjn-pagination span.current {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 40px;
  height: 40px;
  padding: 0 12px;
  border: 1px solid var(--line);
  font-size: 13px;
  color: var(--body);
  background: #fff;
}
.kjn-pagination span.current { background: var(--primary); border-color: var(--primary); color: #fff; font-weight: 700; }
.kjn-pagination a:hover { border-color: var(--primary); color: var(--primary); }

/* 分类筛选 chips */
.kjn-cat-chips { display: flex; flex-wrap: wrap; gap: 10px; margin-bottom: 34px; }
.kjn-cat-chips .chip {
  padding: 8px 16px;
  border: 1px solid var(--line);
  font-size: 13px;
  color: var(--body);
  background: #fff;
}
.kjn-cat-chips .chip:hover { border-color: var(--primary); color: var(--primary); }
.kjn-cat-chips .chip.active { background: var(--primary); border-color: var(--primary); color: #fff; }

/* 正文排版 */
.kjn-prose { font-size: 16px; line-height: 1.9; color: var(--body); }
.kjn-prose h2,
.kjn-prose h3,
.kjn-prose h4 { color: var(--heading); margin: 1.6em 0 0.6em; line-height: 1.35; }
.kjn-prose h2 { font-size: 26px; }
.kjn-prose h3 { font-size: 21px; }
.kjn-prose p { margin: 0 0 1.1em; }
.kjn-prose ul,
.kjn-prose ol { margin: 0 0 1.2em 1.2em; }
.kjn-prose li { margin-bottom: 0.5em; }
.kjn-prose img { max-width: 100%; height: auto; display: block; margin: 1.4em 0; }
.kjn-prose a { color: var(--primary); text-decoration: underline; }
.kjn-prose table { width: 100%; border-collapse: collapse; margin: 1.4em 0; }
.kjn-prose th,
.kjn-prose td { border: 1px solid var(--line); padding: 10px 14px; text-align: left; font-size: 15px; }
.kjn-prose th { background: #f7f9fc; color: var(--heading); }

/* 单页 / 文章容器 */
.kjn-page-wrap { max-width: 1020px; margin: 0 auto; }
.kjn-page-hero-img { margin: 0 0 34px; }
.kjn-page-hero-img img { width: 100%; height: auto; }
.kjn-single-wrap { display: grid; grid-template-columns: minmax(0, 1fr) 320px; gap: 48px; align-items: start; }
.kjn-single-hero { margin: 0 0 28px; }
.kjn-single-hero img { width: 100%; height: auto; }
.kjn-side-card {
  border: 1px solid var(--line);
  padding: 24px;
  margin-bottom: 22px;
  background: #fff;
}
.kjn-side-card h3 { margin: 0 0 10px; font-size: 17px; color: var(--heading); }
.kjn-side-card p { margin: 0 0 16px; font-size: 14px; color: var(--body); line-height: 1.7; }
.kjn-side-card ul { list-style: none; margin: 0; padding: 0; display: flex; flex-direction: column; gap: 10px; }
.kjn-side-card ul a { font-size: 14px; color: var(--body); }
.kjn-side-card ul a:hover { color: var(--primary); }

/* 产品详情 */
.kjn-product-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
  gap: 56px;
  align-items: start;
  padding-top: 56px;
}
.kjn-product-hero { margin: 0; border: 1px solid var(--line); }
.kjn-product-hero img { width: 100%; height: auto; display: block; }
.kjn-product-title { font-size: 30px; line-height: 1.3; margin: 6px 0 16px; color: var(--heading); }
.kjn-product-summary p { margin-top: 0; }
.kjn-specs { width: 100%; border-collapse: collapse; margin: 22px 0 26px; }
.kjn-specs th,
.kjn-specs td { border: 1px solid var(--line); padding: 11px 14px; font-size: 14px; text-align: left; }
.kjn-specs th { width: 38%; background: #f7f9fc; color: var(--heading); font-weight: 600; }
.kjn-product-cta { display: flex; gap: 14px; flex-wrap: wrap; }
.btn-ghost {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 0 26px;
  height: 48px;
  border: 1px solid var(--primary);
  color: var(--primary);
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 0.04em;
}
.btn-ghost:hover { background: var(--primary); color: #fff; }
.kjn-product-body { padding: 56px 0 0; max-width: 1020px; }

/* 联系页卡片 */
.kjn-contact-grid { display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); gap: 24px; margin-top: 40px; }
.kjn-contact-card {
  border: 1px solid var(--line);
  background: #fff;
  padding: 28px 24px;
  text-align: center;
  color: var(--primary);
}
.kjn-contact-card h3 { margin: 14px 0 10px; font-size: 16px; color: var(--heading); }
.kjn-contact-card p { margin: 0; font-size: 14px; color: var(--body); line-height: 1.7; }
.kjn-contact-card a { color: var(--body); }
.kjn-contact-card a:hover { color: var(--primary); }

/* 搜索表单 */
.kjn-search { display: flex; gap: 12px; max-width: 620px; }
.kjn-search input[type="search"] {
  flex: 1;
  height: 48px;
  padding: 0 16px;
  border: 1px solid var(--line);
  background: #fff;
  font-size: 15px;
  color: var(--heading);
}
.kjn-search .btn-solid { height: 48px; }
.kjn-404 { text-align: left; display: flex; flex-direction: column; gap: 18px; align-items: flex-start; }

/* 相关产品区背景 */
.kjn-related { background: #f7f9fc; }

/* 无障碍 */
.sr-only,
.sr-only:not(:focus):not(:active) {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}
.skip-link:focus { position: static; width: auto; height: auto; clip: auto; }

/* 响应式 */
@media (max-width: 1199.98px) {
  .mega { grid-template-columns: repeat(4, minmax(0, 1fr)); }
}
@media (max-width: 991.98px) {
  .mega { display: none; }
  .kjn-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .kjn-single-wrap,
  .kjn-product-grid { grid-template-columns: 1fr; gap: 34px; }
  .kjn-contact-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .kjn-page-hero { padding: 52px 0 40px; }
  .kjn-page-hero h1 { font-size: 26px; }
}
@media (max-width: 575.98px) {
  .kjn-grid { grid-template-columns: 1fr; }
  .kjn-contact-grid { grid-template-columns: 1fr; }
  .kjn-search { flex-direction: column; }
  .kjn-search input[type="search"],
  .kjn-search .btn-solid { width: 100%; }
}