/* ============================================================
   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; }

/* 产品归档：左侧分类栏 + 网格 */
.kjn-archive-wrap {
  display: grid;
  grid-template-columns: 258px minmax(0, 1fr);
  gap: 44px;
  align-items: start;
}
.kjn-cat-side { border: 1px solid var(--line); padding: 22px 20px; background: #fff; }
.kjn-cat-side-title {
  font-size: 18px;
  font-weight: 700;
  color: var(--heading);
  margin: 0 0 14px;
  padding-bottom: 12px;
  border-bottom: 1px solid var(--line);
}
.kjn-cat-tree,
.kjn-cat-sub { list-style: none; margin: 0; padding: 0; }
.kjn-cat-tree > li { border-bottom: 1px solid var(--line); }
.kjn-cat-tree > li:last-child { border-bottom: 0; }
.kjn-cat-tree a { display: block; padding: 11px 0; font-size: 14px; color: var(--body); line-height: 1.45; }
.kjn-cat-tree a:hover { color: var(--primary); }
.kjn-cat-tree > li.active > a { color: var(--primary); font-weight: 700; }
.kjn-cat-sub { padding: 0 0 10px 12px; }
.kjn-cat-sub a { padding: 6px 0; font-size: 13px; }
.kjn-cat-sub li.active > a { color: var(--primary); font-weight: 600; }

/* 分类页 SEO 介绍框（旧站 Banner 下方整宽文档卡） */
.kjn-cat-intro {
  border: 1px solid var(--line);
  background: #fff;
  padding: 30px 34px;
  margin: 0 0 36px;
}
.kjn-cat-intro h2 { font-size: 22px; line-height: 1.35; margin: 0 0 12px; color: var(--heading); }
.kjn-cat-intro h3 { font-size: 17px; margin: 22px 0 10px; color: var(--heading); }
.kjn-cat-intro-body { font-size: 15px; line-height: 1.9; color: var(--body); }
.kjn-cat-intro-body p:last-child { margin-bottom: 0; }
.kjn-cat-adv {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 16px 26px;
}
.kjn-cat-adv li { position: relative; padding-left: 16px; font-size: 14px; line-height: 1.75; color: var(--body); }
.kjn-cat-adv li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 8px;
  width: 6px;
  height: 6px;
  background: var(--primary);
}
.kjn-cat-adv strong { color: var(--heading); }

/* 产品图集：缩略图切换 */
.kjn-product-thumbs {
  display: grid;
  grid-template-columns: repeat(5, minmax(0, 1fr));
  gap: 10px;
  margin-top: 12px;
}
.kjn-product-thumbs .kjn-pt {
  padding: 0;
  border: 1px solid var(--line);
  background: #fff;
  cursor: pointer;
  line-height: 0;
}
.kjn-product-thumbs .kjn-pt img { width: 100%; height: auto; display: block; }
.kjn-product-thumbs .kjn-pt:hover { border-color: var(--primary); }
.kjn-product-thumbs .kjn-pt.active { border-color: var(--primary); box-shadow: 0 0 0 1px var(--primary) inset; }

/* 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 */
/* 产品详情：左侧分类树（3 层）+ 主区两栏 */
.kjn-product-wrap {
  display: grid;
  grid-template-columns: 236px minmax(0, 1fr);
  gap: 40px;
  align-items: start;
  padding-top: 56px;
}
.kjn-product-side {
  border: 1px solid var(--line);
  padding: 18px 16px;
  background: #fff;
  position: sticky;
  top: 84px;
  max-height: calc(100vh - 110px);
  overflow: auto;
}
.kjn-product-side .kjn-cat-side-title { font-size: 16px; }
.kjn-product-side .kjn-cat-tree > li > a,
.kjn-product-side .kjn-cat-sub a {
  display: block;
  padding: 7px 0;
  font-size: 13.5px;
  line-height: 1.45;
  color: var(--body);
  border-bottom: 1px solid #f3f5f8;
}
.kjn-product-side .kjn-cat-sub { list-style: none; margin: 0; padding: 0; }
.kjn-product-side .kjn-cat-sub.lvl1 > li > a { font-weight: 600; color: var(--heading); padding-top: 12px; }
.kjn-product-side .kjn-cat-sub.lvl2 > li > a { padding-left: 13px; }
.kjn-product-side .kjn-cat-sub.lvl3 > li > a { padding-left: 26px; font-size: 12.8px; }
.kjn-product-side a:hover,
.kjn-product-side li.active > a { color: var(--primary); }

/* 正文锚点导航（旧站 10 项） */
.kjn-anchors {
  display: flex;
  gap: 4px;
  overflow-x: auto;
  white-space: nowrap;
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
  background: #fff;
  position: sticky;
  top: 60px;
  z-index: 20;
  margin: 26px 0 0;
}
.kjn-anchors a {
  display: inline-block;
  padding: 13px 14px;
  font-size: 13.5px;
  color: var(--body);
  border-bottom: 2px solid transparent;
}
.kjn-anchors a:hover {
  color: var(--primary);
  border-bottom-color: var(--primary);
}

.kjn-product-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
  gap: 56px;
  align-items: start;
}
.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(3, 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 (min-width: 992px) {
  /* 桌面有左侧分类栏时，chips 冗余，隐藏 */
  .kjn-archive-wrap .kjn-cat-chips { display: none; }
}
@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; }
  /* 窄屏收起产品详情左树，正文占满 */
  .kjn-product-wrap { grid-template-columns: 1fr; gap: 0; }
  .kjn-product-side { display: none; }
  .kjn-anchors { top: 52px; }
  .kjn-cat-intro { padding: 22px 20px; }
  .kjn-cat-adv { grid-template-columns: 1fr; }
  .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; }
  /* 窄屏收起侧栏，改用 chips 与移动抽屉 */
  .kjn-archive-wrap { grid-template-columns: 1fr; gap: 0; }
  .kjn-cat-side { display: none; }
  .kjn-product-thumbs { grid-template-columns: repeat(4, minmax(0, 1fr)); }
}
@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%; }
}

/* -------------------------------------------------------------------------
 * News 两栏（列表 760 + 侧栏 300），对应旧站
 * ---------------------------------------------------------------------- */
.kjn-news-wrap {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 320px;
  gap: 48px;
  align-items: start;
}
.kjn-news-side { position: sticky; top: 84px; }
.kjn-side-card { border: 1px solid var(--line); background: #fff; padding: 20px; }
.kjn-side-title {
  font-size: 17px;
  margin: 0 0 10px;
  padding-bottom: 12px;
  border-bottom: 2px solid var(--primary);
  color: var(--heading);
}
.kjn-hot-news ul { list-style: none; margin: 0; padding: 0; }
.kjn-hot-news li { padding: 12px 0; border-bottom: 1px solid #f1f3f6; }
.kjn-hot-news li:last-child { border-bottom: 0; padding-bottom: 0; }
.kjn-hot-news a { display: block; font-size: 14px; line-height: 1.55; color: var(--heading); }
.kjn-hot-news a:hover { color: var(--primary); }
.kjn-hot-news time { display: block; margin-top: 6px; font-size: 12px; color: #8a94a3; }
.kjn-side-promo { display: block; margin-top: 26px; border: 1px solid var(--line); background: #fff; }
.kjn-side-promo img { display: block; width: 100%; height: auto; }
.kjn-side-promo span { display: block; padding: 14px 18px; font-weight: 600; color: var(--primary); }
.kjn-side-promo:hover span { color: var(--primary-deep); }

.kjn-back { display: inline-block; margin: 18px 0 0; font-size: 14px; color: var(--primary); }
.kjn-single-main .post-navigation {
  margin-top: 44px;
  padding-top: 26px;
  border-top: 1px solid var(--line);
}
.kjn-back:hover { text-decoration: underline; }
.kjn-post-related { margin-top: 56px; border-top: 1px solid var(--line); padding-top: 36px; }
.kjn-post-related .pcard-img img {
  width: 100%;
  height: auto;
  aspect-ratio: 4 / 3;
  object-fit: cover;
}
.kjn-related-title { font-size: 20px; margin: 0 0 22px; color: var(--heading); }

@media (max-width: 991.98px) {
  .kjn-news-wrap { grid-template-columns: 1fr; gap: 34px; }
  .kjn-news-side { position: static; }
}

/* -------------------------------------------------------------------------
 * 关键词落地页 /application/{slug}
 * ---------------------------------------------------------------------- */
/* 补译语种的译文正文（fa / ru / es）：保留旧站段落结构 */
.kjn-landing-body { max-width: 900px; margin: 0 auto; }
.kjn-landing-body h2 { font-size: 26px; line-height: 1.35; margin: 48px 0 16px; color: var(--heading); }
.kjn-landing-body h2:first-child { margin-top: 0; }
.kjn-landing-body h3 { font-size: 18px; line-height: 1.5; margin: 32px 0 10px; color: var(--heading); }
.kjn-landing-body p { font-size: 15.5px; line-height: 1.95; color: var(--body); margin: 0 0 16px; }
.kjn-landing-body ul { margin: 0 0 18px; padding-inline-start: 22px; }
.kjn-landing-body li { font-size: 15.5px; line-height: 1.9; color: var(--body); margin-bottom: 8px; }
.kjn-landing-body a { color: var(--brand); text-decoration: underline; }

.kjn-landing-intro { max-width: 900px; margin: 0 auto 44px; }
.kjn-landing-intro p { font-size: 15.5px; line-height: 1.95; color: var(--body); }
.kjn-landing-cta { margin-top: 28px; }
.kjn-landing-adv .kjn-landing-card { border: 1px solid var(--line); background: #fff; padding: 26px 24px; }
.kjn-landing-card h3 { font-size: 17px; line-height: 1.45; margin: 0 0 10px; color: var(--heading); }
.kjn-landing-card p { font-size: 14.2px; line-height: 1.8; color: var(--body); margin: 0; }
.kjn-landing-block { margin-top: 60px; }
.kjn-landing-block .sec-h2 { margin-bottom: 24px; }
.kjn-landing-closing { margin-top: 44px; font-size: 15.5px; line-height: 1.9; color: var(--body); }
.kjn-landing-extra { display: grid; grid-template-columns: 1fr 1fr; gap: 36px; margin-top: 52px; }
.kjn-landing-extra h3 { font-size: 18px; margin: 0 0 10px; color: var(--heading); }
.kjn-landing-extra p { font-size: 14.5px; line-height: 1.85; color: var(--body); }
.kjn-faq { border-bottom: 1px solid var(--line); padding: 16px 0; }
.kjn-faq summary { cursor: pointer; font-weight: 600; font-size: 15.5px; color: var(--heading); }
.kjn-faq p { margin: 12px 0 0; font-size: 14.5px; line-height: 1.85; color: var(--body); }
.kjn-landing-news { border: 1px solid var(--line); background: #fff; padding: 20px; }
.kjn-landing-news time { font-size: 12px; color: #8a94a3; }
.kjn-landing-news h3 { font-size: 15.5px; line-height: 1.5; margin: 8px 0 10px; }
.kjn-landing-news p { font-size: 13.5px; line-height: 1.75; color: var(--body); margin: 0; }
.kjn-kw-links ul { list-style: none; margin: 0; padding: 0; display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 8px 20px; }
.kjn-kw-links a { color: var(--primary); font-size: 14px; }
.kjn-kw-links a:hover { text-decoration: underline; }

/* 落地页互链：同主题材料 */
.kjn-sib-list { list-style: none; margin: 0; padding: 0; display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 12px 20px; }
.kjn-sib-list a {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 14px;
  padding: 15px 18px;
  border: 1px solid var(--line);
  background: #fff;
  font-size: 14.5px;
  line-height: 1.5;
  color: var(--heading);
  transition: border-color var(--dur) ease, color var(--dur) ease, transform var(--dur) ease;
}
.kjn-sib-list a:hover { border-color: var(--primary); color: var(--primary); transform: translateX(2px); }
.kjn-sib-arrow { flex: none; color: var(--primary); font-size: 15px; }

@media (max-width: 991.98px) {
  .kjn-landing-extra { grid-template-columns: 1fr; }
  .kjn-kw-links ul { grid-template-columns: 1fr 1fr; }
  .kjn-sib-list { grid-template-columns: 1fr; }
}

/* 落地页重写版：正文分节 */
.kjn-landing-sections { margin-top: 4px; }
.kjn-landing-section { padding: 28px 0; border-top: 1px solid var(--line); }
.kjn-landing-section h2 { font-size: 21px; line-height: 1.4; margin: 0 0 10px; color: var(--heading); }
.kjn-landing-section p { font-size: 15.2px; line-height: 1.95; color: var(--body); margin: 0; }

/* /video/ YouTube 内嵌：16:9 自适应 */
.kjn-video-frame {
  position: relative;
  width: 100%;
  aspect-ratio: 16 / 9;
  background: #0b1220;
  border: 1px solid var(--line);
  overflow: hidden;
}
.kjn-video-frame iframe {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  border: 0;
}