/* ==========================================================================
   Yutong Heavy Industries — B2B Industrial Redesign
   Brand: primary #01458e  accent #1996e6 / #00a8fb
   ========================================================================== */

:root {
  --primary: #01458e;
  --primary-dark: #013a77;
  --accent: #1996e6;
  --accent-bright: #00a8fb;
  --ink: #1f2937;
  --ink-soft: #4b5563;
  --muted: #6b7280;
  --line: #e5e7eb;
  --bg: #ffffff;
  --bg-soft: #f4f7fb;
  --radius: 0.625rem;
  --shadow: 0 0.25rem 0.75rem rgba(1, 69, 142, 0.08);
  --shadow-hover: 0 0.6rem 1.5rem rgba(1, 69, 142, 0.16);
  --container: 76rem;
  --header-h: 4.5rem;
}

* { margin: 0; padding: 0; box-sizing: border-box; }

html { font-size: 100%; }

body {
  font-family: -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  color: var(--ink);
  background: var(--bg);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

img { max-width: 100%; display: block; }
a { color: var(--primary); text-decoration: none; }
a:hover { color: var(--accent); }
ul { list-style: none; }

.container {
  width: 100%;
  max-width: var(--container);
  margin: 0 auto;
  padding: 0 1.25rem;
}

h1, h2, h3, h4 { line-height: 1.25; color: var(--ink); font-weight: 700; }

/* ---------- Buttons ---------- */
.btn {
  display: inline-block;
  padding: 0.75rem 1.75rem;
  border-radius: 0.375rem;
  font-weight: 600;
  font-size: 0.95rem;
  border: 2px solid transparent;
  cursor: pointer;
  transition: all 0.2s ease;
  text-align: center;
}
.btn-primary { background: var(--primary); color: #fff; }
.btn-primary:hover { background: var(--primary-dark); color: #fff; }
.btn-outline { background: transparent; color: #fff; border-color: #fff; }
.btn-outline:hover { background: #fff; color: var(--primary); }
.btn-light { background: #fff; color: var(--primary); }
.btn-light:hover { background: var(--bg-soft); }

/* ---------- Top notification bar ---------- */
.topbar {
  background: var(--primary-dark);
  color: #cfe3f7;
  font-size: 0.8rem;
}
.topbar .container {
  display: flex;
  justify-content: space-between;
  align-items: center;
  min-height: 2.25rem;
  gap: 1rem;
}
.topbar a { color: #fff; }
.topbar .topbar-right { display: flex; gap: 1.25rem; }
.topbar .topbar-right a:hover{ color: #ffa703; }

/* ---------- Header ---------- */
.site-header {
  background: #fff;
  box-shadow: 0 1px 0 var(--line);
  position: sticky;
  top: 0;
  z-index: 100;
}
.site-header .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  min-height: var(--header-h);
  gap: 1rem;
}
.brand img { height: 3.5rem; width: auto; }

.main-nav > ul { display: flex; align-items: center; gap: 0.25rem; }
.main-nav a {
  display: block;
  padding: 0.5rem 0.85rem;
  color: var(--ink);
  font-weight: 500;
  font-size: 0.95rem;
  border-radius: 0.375rem;
}
.main-nav a:hover, .main-nav a.active { color: var(--primary); background: var(--bg-soft); }

.has-dropdown { position: relative; }
.has-dropdown > a::after {
  content: "▾";
  font-size: 0.7rem;
  margin-left: 0.3rem;
  color: var(--muted);
}
.dropdown {
  position: absolute;
  top: 100%;
  left: 0;
  min-width: 13rem;
  background: #fff;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  box-shadow: var(--shadow-hover);
  padding: 0.5rem 0;
  opacity: 0;
  visibility: hidden;
  transform: translateY(0.5rem);
  transition: all 0.2s ease;
}
.has-dropdown:hover .dropdown { opacity: 1; visibility: visible; transform: translateY(0); }
.dropdown a { padding: 0.55rem 1rem; white-space: nowrap; }
.dropdown a:hover { background: var(--bg-soft); color: var(--primary); }

.header-actions { display: flex; align-items: center; gap: 0.75rem; }
.lang-select {
  padding: 0.45rem 0.6rem;
  border: 1px solid var(--line);
  border-radius: 0.375rem;
  background: #fff;
  color: var(--ink);
  font-size: 0.85rem;
}
.inquiry-btn { padding: 0.55rem 1.1rem; font-size: 0.88rem; }

/* Hamburger */
.nav-toggle {
  display: none;
  flex-direction: column;
  gap: 0.35rem;
  background: none;
  border: none;
  cursor: pointer;
  padding: 0.5rem;
}
.nav-toggle span {
  width: 1.5rem;
  height: 0.18rem;
  background: var(--primary);
  border-radius: 2px;
  transition: all 0.3s;
}

/* ---------- Hero ---------- */
.hero { position: relative; overflow: hidden; background: var(--primary-dark); }
.hero-slide { position: relative; }
.hero-slide img { width: 100%; height: 74vh; min-height: 26rem; object-fit: cover; object-position: center 55%; display: block; }
.hero-overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(90deg, rgba(1,58,119,0.85) 0%, rgba(1,69,142,0.55) 55%, rgba(1,69,142,0.15) 100%);
  display: flex;
  align-items: center;
}
.hero-content { max-width: 40rem; color: #fff; padding: 0 2rem; }
.hero-content h1 { color: #fff; font-size: clamp(1.6rem, 4vw, 3rem); margin-bottom: 1rem; }
.hero-content p { font-size: clamp(0.95rem, 1.5vw, 1.15rem); color: #d6e6f7; margin-bottom: 1.75rem; }
.hero-cta { display: flex; gap: 0.85rem; flex-wrap: wrap; }

/* ---------- Sections ---------- */
.section { padding: 4rem 0; }
.section-alt { background: var(--bg-soft); }
.section-head { text-align: center; max-width: 44rem; margin: 0 auto 2.5rem; }
.section-head .eyebrow {
  color: var(--accent);
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  font-size: 0.8rem;
}
.section-head h2 { font-size: clamp(1.5rem, 3vw, 2.2rem); margin: 0.5rem 0; }
.section-head p { color: var(--muted); }

/* ---------- Category cards ---------- */
.cat-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.5rem;
}
.cat-card {
  background: #fff;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  overflow: hidden;
  box-shadow: var(--shadow);
  transition: transform 0.2s ease, box-shadow 0.2s ease;
}
.cat-card:hover { transform: translateY(-0.3rem); box-shadow: var(--shadow-hover); }
.cat-card .thumb { aspect-ratio: 16 / 10; overflow: hidden; background: var(--bg-soft); }
.cat-card .thumb img { width: 100%; height: 100%; object-fit: cover; transition: transform 0.3s ease; }
.cat-card:hover .thumb img { transform: scale(1.05); }
.cat-card .cat-body { padding: 1.1rem 1.25rem 1.4rem; }
.cat-card h3 { font-size: 1.1rem; margin-bottom: 0.4rem; }
.cat-card p { color: var(--muted); font-size: 0.9rem; margin-bottom: 0.75rem; }
.cat-card .link { font-weight: 600; font-size: 0.9rem; }

/* ---------- Product grid (listing) ---------- */
.product-layout { display: grid; grid-template-columns: 15rem 1fr; gap: 2rem; align-items: start; }
.sidebar {
  background: #fff;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 1.25rem;
  position: sticky;
  top: calc(var(--header-h) + 1rem);
}
.sidebar h3 {
  font-size: 1rem;
  padding-bottom: 0.75rem;
  margin-bottom: 0.5rem;
  border-bottom: 2px solid var(--primary);
}
.sidebar li a {
  display: block;
  padding: 0.55rem 0.75rem;
  color: var(--ink-soft);
  border-radius: 0.375rem;
  font-size: 0.92rem;
}
.sidebar li a:hover, .sidebar li a.active { background: var(--bg-soft); color: var(--primary); }
.sidebar li a.active { font-weight: 700; }

.product-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.5rem;
}
.product-card {
  background: #fff;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  overflow: hidden;
  box-shadow: var(--shadow);
  display: flex;
  flex-direction: column;
  transition: transform 0.2s ease, box-shadow 0.2s ease;
  margin-left: 5px;
}
.product-card:hover { transform: translateY(-0.3rem); box-shadow: var(--shadow-hover); }
.product-card .thumb { aspect-ratio: 4 / 3; background: var(--bg-soft); overflow: hidden; }
.product-card .thumb img { width: 100%; height: 100%; object-fit: cover; }
.product-card .p-body { padding: 1.1rem 1.25rem 1.4rem; display: flex; flex-direction: column; flex: 1; }
.product-card h3 { font-size: 1.05rem; margin-bottom: 0.5rem; }
.product-card p { color: var(--muted); font-size: 0.88rem; flex: 1; margin-bottom: 1rem; }
.product-card .btn { align-self: flex-start; padding: 0.5rem 1.1rem; font-size: 0.85rem; }

/* ---------- Pagination ---------- */
.pagination { display: flex; gap: 0.4rem; justify-content: center; margin-top: 2.5rem; }
.pagination a, .pagination span {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 2.4rem;
  height: 2.4rem;
  padding: 0 0.6rem;
  border: 1px solid var(--line);
  border-radius: 0.375rem;
  color: var(--ink-soft);
  font-size: 0.9rem;
}
.pagination span.current { background: var(--primary); color: #fff; border-color: var(--primary); }
.pagination a:hover { border-color: var(--primary); color: var(--primary); }

/* ---------- Why choose us ---------- */
.why-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 1.5rem; }
.why-card {
  background: #fff;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 1.75rem 1.5rem;
  text-align: center;
  box-shadow: var(--shadow);
}
.why-card .ico {
  width: 3.25rem;
  height: 3.25rem;
  margin: 0 auto 1rem;
  border-radius: 50%;
  background: var(--bg-soft);
  color: var(--primary);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.5rem;
  font-weight: 700;
}
.why-card h3 { font-size: 1.05rem; margin-bottom: 0.5rem; }
.why-card p { color: var(--muted); font-size: 0.88rem; }

/* ---------- News ---------- */
.news-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 1.5rem; }
.news-card {
  background: #fff;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 1.5rem;
  box-shadow: var(--shadow);
}
.news-card .date { color: var(--accent); font-weight: 700; font-size: 0.85rem; }
.news-card h3 { font-size: 1.05rem; margin: 0.6rem 0; }
.news-card p { color: var(--muted); font-size: 0.9rem; }

/* ---------- Breadcrumb ---------- */
.breadcrumb-bar { background: var(--bg-soft); border-bottom: 1px solid var(--line); font-size: 0.88rem; }
.breadcrumb-bar .container { padding-top: 0.85rem; padding-bottom: 0.85rem; }
.breadcrumb-bar a { color: var(--primary); }
.breadcrumb-bar .sep { color: var(--muted); margin: 0 0.4rem; }
.breadcrumb-bar .current { color: var(--muted); }

/* Page banner */
.page-banner { background: var(--primary-dark); color: #fff; padding: 3rem 0; }
.page-banner h1 { color: #fff; font-size: clamp(1.6rem, 3.5vw, 2.4rem); }
.page-banner p { color: #cfe3f7; margin-top: 0.5rem; max-width: 40rem; margin-left: 10px;}

/* ---------- Product detail ---------- */
.pd-layout { display: grid; grid-template-columns: 1fr 1.1fr; gap: 2.5rem; align-items: start; }
.pd-main-img {
  border: 1px solid var(--line);
  border-radius: var(--radius);
  overflow: hidden;
  background: #fff;
  aspect-ratio: 4 / 3;
}
.pd-main-img img { width: 100%; height: 100%; object-fit: contain; background: #fff; }
.pd-thumbs { display: flex; gap: 0.6rem; margin-top: 0.75rem; flex-wrap: wrap; }
.pd-thumbs button {
  width: 5rem;
  height: 3.75rem;
  border: 2px solid var(--line);
  border-radius: 0.375rem;
  overflow: hidden;
  cursor: pointer;
  background: #fff;
  padding: 0;
}
.pd-thumbs button.active { border-color: var(--primary); }
.pd-thumbs img { width: 100%; height: 100%; object-fit: cover; }

.pd-info h1, .pd-info .pd-title { font-size: clamp(1.4rem, 2.5vw, 1.9rem); margin-bottom: 0.5rem; margin-top: 0; }
.pd-model { color: var(--accent); font-weight: 700; margin-bottom: 1rem; }
.pd-desc { color: var(--ink-soft); margin-bottom: 1.25rem; }
.pd-stats {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 0.75rem;
  margin: 1.25rem 0 1.5rem;
}
.pd-stat { background: var(--bg-soft); border-radius: 0.5rem; padding: 0.85rem; text-align: center; }
.pd-stat .num { font-size: 1.25rem; font-weight: 700; color: var(--primary); }
.pd-stat .lbl { font-size: 0.75rem; color: var(--muted); }
.pd-cta { display: flex; gap: 0.75rem; flex-wrap: wrap; }

.spec-table-wrap { overflow-x: auto; border: 1px solid var(--line); border-radius: var(--radius); }
.spec-table { width: 100%; border-collapse: collapse; min-width: 36rem; background: #fff; }
.spec-table caption {
  background: var(--primary);
  color: #fff;
  text-align: left;
  padding: 0.85rem 1.25rem;
  font-weight: 700;
}
.spec-table th, .spec-table td { padding: 0.75rem 1.25rem; border-bottom: 1px solid var(--line); text-align: left; font-size: 0.92rem; }
.spec-table th { background: var(--bg-soft); color: var(--ink); font-weight: 600; width: 40%; }
.spec-table tr:last-child td { border-bottom: none; }

.pd-section { margin-top: 3rem;}
.pd-section h2 { font-size: 1.4rem; margin-bottom: 1.25rem; padding-bottom: 0.5rem; border-bottom: 2px solid var(--primary); display: inline-block; }
.pd-feature h4 { margin: 1rem 0 0.35rem; color: var(--primary); }
.pd-feature p { color: var(--ink-soft); }

/* ---------- About ---------- */
.about-grid { display: grid; grid-template-columns: 1.2fr 1fr; gap: 2.5rem; align-items: center; }
.about-text p { color: var(--ink-soft); margin-bottom: 1rem; }
.about-text h2 { font-size: 1.6rem; margin-bottom: 1.25rem; }
.about-img-collage { display: grid; grid-template-columns: 1fr 1fr; gap: 1rem; }
.about-img-collage .ph { border-radius: var(--radius); overflow: hidden; aspect-ratio: 4/3; box-shadow: var(--shadow); }
.about-img-collage img { width: 100%; height: 100%; object-fit: cover; }

.timeline { position: relative; margin: 2rem 0; padding-left: 1.5rem; border-left: 2px solid var(--line); }
.timeline .t-item { position: relative; padding-bottom: 1.5rem; }
.timeline .t-item::before {
  content: "";
  position: absolute;
  left: -1.65rem;
  top: 0.35rem;
  width: 0.8rem;
  height: 0.8rem;
  border-radius: 50%;
  background: var(--primary);
  border: 3px solid #fff;
  box-shadow: 0 0 0 2px var(--primary);
}
.timeline .t-year { font-weight: 700; color: var(--accent); }
.timeline p { color: var(--muted); font-size: 0.92rem; }

.cert-grid { display: grid; grid-template-columns: repeat(6, 1fr); gap: 1rem; }
.cert-grid .cert {
  border: 1px solid var(--line);
  border-radius: var(--radius);
  overflow: hidden;
  background: #fff;
  aspect-ratio: 3 / 4;
}
.cert-grid .cert img { width: 100%; height: 100%; object-fit: cover; }

/* ---------- Contact ---------- */
.contact-layout { display: grid; grid-template-columns: 1fr 1.3fr; gap: 2.5rem; align-items: start; }
.contact-info-card { background: var(--primary); color: #fff; border-radius: var(--radius); padding: 2rem; }
.contact-info-card h3 { color: #fff; margin-bottom: 1.25rem; }
.contact-info-card .row { display: flex; gap: 0.85rem; margin-bottom: 1.1rem; }
.contact-info-card .row .k { color: #9fc6f0; min-width: 5.5rem; font-weight: 600; }
.contact-info-card a { color: #fff; }

.inquiry-form { background: #fff; border: 1px solid var(--line); border-radius: var(--radius); padding: 2rem; box-shadow: var(--shadow); }
.form-row { display: grid; grid-template-columns: 1fr 1fr; gap: 1rem; }
.form-group { margin-bottom: 1rem; display: flex; flex-direction: column; }
.form-group label { font-size: 0.85rem; font-weight: 600; margin-bottom: 0.35rem; color: var(--ink-soft); }
.form-group input, .form-group select, .form-group textarea {
  padding: 0.7rem 0.85rem;
  border: 1px solid var(--line);
  border-radius: 0.375rem;
  font-family: inherit;
  font-size: 0.92rem;
}
.form-group input:focus, .form-group select:focus, .form-group textarea:focus { outline: 2px solid var(--accent); border-color: var(--accent); }
.form-group textarea { resize: vertical; min-height: 7rem; }

.map-placeholder {
  margin-top: 2.5rem;
  border-radius: var(--radius);
  overflow: hidden;
  border: 1px solid var(--line);
  height: 22rem;
  background: var(--bg-soft);
}
.map-placeholder iframe { width: 100%; height: 100%; border: 0; }

/* ---------- Footer ---------- */
.site-footer { background: #0b2545; color: #b9cbe0; margin-top: 4rem; }
.footer-grid { display: grid; grid-template-columns: 1.3fr 0.8fr 0.8fr 1fr 1fr 1fr 1fr 0.9fr 1.15fr; gap: 2rem; padding: 3rem 0 2rem; }
.site-footer h3 { color: #fff; font-size: 1.05rem; margin-bottom: 1rem; }
.site-footer p { font-size: 0.9rem; margin-bottom: 0.6rem; }
.site-footer a { color: #b9cbe0; }
.site-footer a:hover { color: #fff; }
.footer-col li { margin-bottom: 0.5rem; }
.footer-col li a { font-size: 0.9rem; }
.footer-bottom {
  border-top: 1px solid rgba(255,255,255,0.1);
  padding: 1.25rem 0;
  font-size: 0.82rem;
  text-align: center;
}

/* ==========================================================================
   Responsive
   ========================================================================== */
@media (max-width: 1024px) {
  .cat-grid, .product-grid, .news-grid { grid-template-columns: repeat(2, 1fr); }
  .why-grid { grid-template-columns: repeat(2, 1fr); }
  .product-layout { grid-template-columns: 1fr; }
  .sidebar { position: static; }
  .pd-layout { grid-template-columns: 1fr; }
  .about-grid { grid-template-columns: 1fr; }
  .contact-layout { grid-template-columns: 1fr; }
  .cert-grid { grid-template-columns: repeat(3, 1fr); }
  .footer-grid { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 768px) {
  html { font-size: 95%; }
  .main-nav {
    position: fixed;
    top: 0;
    right: -100%;
    width: 80%;
    max-width: 19rem;
    height: 100vh;
    background: #fff;
    box-shadow: -0.5rem 0 1.5rem rgba(0,0,0,0.15);
    padding: 4.5rem 1.25rem 1.25rem;
    transition: right 0.3s ease;
    overflow-y: auto;
    z-index: 200;
  }
  .main-nav.open { right: 0; }
  .main-nav > ul { flex-direction: column; align-items: stretch; gap: 0; }
  .has-dropdown { position: static; }
  .dropdown {
    position: static;
    opacity: 1;
    visibility: visible;
    transform: none;
    box-shadow: none;
    border: none;
    padding-left: 1rem;
    display: none;
  }
  .has-dropdown.open .dropdown { display: block; }
  .nav-toggle { display: flex; }
  .lang-select { display: none; }
  .hero-slide img { height: 48vh; min-height: 18rem; }
  .hero-content { padding: 0 1.5rem; }
  .section { padding: 2.75rem 0; }
  .topbar .topbar-left { display: none; }
  .topbar .container { justify-content: center; }
}

@media (max-width: 480px) {
  .cat-grid, .product-grid, .news-grid, .why-grid { grid-template-columns: 1fr; }
  .form-row { grid-template-columns: 1fr; }
  .pd-stats { grid-template-columns: repeat(3, 1fr); gap: 0.5rem; }
  .pd-stat { padding: 0.6rem 0.4rem; }
  .pd-stat .num { font-size: 1rem; }
  .cert-grid { grid-template-columns: repeat(2, 1fr); }
  .footer-grid { grid-template-columns: 1fr; }
  .hero-cta .btn { width: 100%; }
}

/* === Shard A additions: FAQ + spec group === */
.faq-list{display:flex;flex-direction:column;gap:10px}
.faq-item{border:1px solid #e3e7ec;border-radius:8px;background:#fff;padding:0 16px}
.faq-item summary{cursor:pointer;font-weight:600;padding:14px 0;list-style:none;position:relative;padding-right:28px}
.faq-item summary::-webkit-details-marker{display:none}
.faq-item summary:after{content:"+";position:absolute;right:0;top:12px;font-size:20px;color:#0b7;transition:transform .2s}
.faq-item[open] summary:after{transform:rotate(45deg)}
.faq-item p{margin:0;padding:0 0 14px;color:#4a5560;line-height:1.7}
.spec-table th.spec-group{background:#0b79c0;color:#fff;text-align:left}

/* ==========================================================================
   Sanitation category sample: sub-category tabs + group nav + subcat grid
   ========================================================================== */

/* Horizontal sub-category tab bar (full width, below H1 banner) */
.subcat-tabs {
  display: flex;
  gap: 0.5rem;
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
  background: #fff;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 0.5rem;
  margin-bottom: 2rem;
  box-shadow: var(--shadow);
  scrollbar-width: thin;
}
.subcat-tab {
  flex: 0 0 auto;
  white-space: nowrap;
  border: 1px solid var(--line);
  background: #fff;
  color: var(--ink-soft);
  padding: 0.55rem 1.1rem;
  border-radius: 999px;
  font-size: 0.88rem;
  font-weight: 600;
  cursor: pointer;
  transition: background 0.2s ease, color 0.2s ease, border-color 0.2s ease;
}
.subcat-tab:hover { color: var(--primary); border-color: var(--accent); }
.subcat-tab.active {
  background: var(--primary);
  color: #fff;
  border-color: var(--primary);
}

/* Right content column inside product-layout */
.content-col { min-width: 0; }

/* First-level group nav cards (white rounded cards) */
.group-nav {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1rem;
  margin-bottom: 2.25rem;
}
.group-card {
  display: block;
  background: #fff;
  border: 1px solid var(--line);
  border-left: 4px solid var(--line);
  border-radius: var(--radius);
  padding: 1rem 1.15rem;
  box-shadow: var(--shadow);
  transition: transform 0.2s ease, box-shadow 0.2s ease, border-color 0.2s ease;
}
.group-card:hover { transform: translateY(-0.25rem); box-shadow: var(--shadow-hover); }
.group-card h4 { font-size: 1rem; margin-bottom: 0.35rem; color: var(--ink); }
.group-card p { color: var(--muted); font-size: 0.85rem; line-height: 1.5; margin: 0; }
.group-card.active {
  border-left-color: var(--primary);
  background: var(--bg-soft);
}
.group-card.active h4 { color: var(--primary); }

/* Second-level sub-category grid */
.subcat-grid-title {
  font-size: 1.4rem;
  margin-bottom: 1.25rem;
  padding-bottom: 0.5rem;
  border-bottom: 2px solid var(--primary);
  display: inline-block;
}
.subcat-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.5rem;
  margin-bottom: 1rem;
}
.subcat-card {
  background: #fff;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  overflow: hidden;
  box-shadow: var(--shadow);
  display: flex;
  flex-direction: column;
  transition: transform 0.2s ease, box-shadow 0.2s ease;
}
.subcat-card:hover { transform: translateY(-0.3rem); box-shadow: var(--shadow-hover); }
.subcat-card .thumb {
  aspect-ratio: 16 / 10;
  background: var(--bg-soft);
  overflow: hidden;
}
.subcat-card .thumb img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.3s ease;
}
.subcat-card:hover .thumb img { transform: scale(1.05); }
.subcat-card .sc-body { padding: 1rem 1.15rem 1.2rem; display: flex; flex-direction: column; flex: 1; }
.subcat-card h4 { font-size: 1.02rem; margin-bottom: 0.4rem; color: var(--ink); }
.subcat-card p { color: var(--muted); font-size: 0.85rem; flex: 1; margin-bottom: 0.85rem; line-height: 1.5; }
.subcat-card .sc-link { font-weight: 600; font-size: 0.88rem; color: var(--primary); }
.subcat-card:hover .sc-link { color: var(--accent); }

/* Responsive for sanitation sample components */
@media (max-width: 1024px) {
  .group-nav { grid-template-columns: 1fr; }
  .subcat-grid { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 480px) {
  .subcat-grid { grid-template-columns: 1fr; }
  .subcat-tabs { border-radius: var(--radius); }
}

/* ==========================================================================
   Deep marketing / buying-guide content (sanitation category page)
   ========================================================================== */
.deep-content {
  margin-top: 3rem;
  display: flex;
  flex-direction: column;
  gap: 1.75rem;
}
.deep-card {
  background: #ffffff;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: 2rem clamp(1.25rem, 3vw, 2.5rem);
}
.deep-card h2 {
  font-size: clamp(1.3rem, 2.4vw, 1.7rem);
  color: var(--primary);
  margin-bottom: 1.1rem;
  padding-bottom: 0.6rem;
  border-bottom: 2px solid var(--primary);
  display: inline-block;
}
.deep-card p {
  color: var(--ink-soft);
  margin-bottom: 0.9rem;
  font-size: 0.96rem;
}
.deep-card p:last-child { margin-bottom: 0; }
.deep-card strong { color: var(--ink); }

/* Native <details> folding blocks with light-blue border */
.dc-details {
  border: 1px solid #cfe3f7;
  border-radius: 0.5rem;
  background: #fbfdff;
  margin-bottom: 0.75rem;
  padding: 0 1.1rem;
}
.dc-details:last-child { margin-bottom: 0; }
.dc-details summary {
  cursor: pointer;
  list-style: none;
  position: relative;
  padding: 0.95rem 1.75rem 0.95rem 0;
  min-height: 2.25rem;
  display: flex;
  align-items: center;
  font-weight: 600;
  color: var(--primary);
  font-size: 0.98rem;
}
.dc-details summary::-webkit-details-marker { display: none; }
.dc-details summary::after {
  content: "";
  position: absolute;
  right: 0.25rem;
  top: 50%;
  width: 9px;
  height: 9px;
  border-right: 2px solid var(--primary);
  border-bottom: 2px solid var(--primary);
  transform: translateY(-70%) rotate(45deg);
  transition: transform 0.2s ease;
}
.dc-details[open] summary::after {
  transform: translateY(-30%) rotate(225deg);
}
.dc-details summary .dc-h {
  margin: 0;
  font-size: 1.02rem;
  font-weight: 700;
  color: var(--primary);
}
.dc-body { padding: 0.15rem 0 1.1rem; }
.dc-body p { color: var(--ink-soft); margin-bottom: 0.7rem; font-size: 0.94rem; }
.dc-body p:last-child { margin-bottom: 0; }

/* CTA callout inside the export/support card */
.dc-cta {
  margin-top: 1.25rem;
  padding: 1.1rem 1.25rem;
  background: var(--bg-soft);
  border-left: 4px solid var(--primary);
  border-radius: 0.375rem;
}
.dc-cta p { margin-bottom: 0; }
.dc-cta a { font-weight: 700; }

@media (max-width: 768px) {
  .deep-card { padding: 1.4rem 1.15rem; }
  .dc-details { padding: 0 0.9rem; }
}

/* Related tags / popular searches (keyword stuffing fix) */
.related-tags {
  margin: 2rem 0;
  padding: 1.5rem;
  background: #f8fafd;
  border-radius: 8px;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.5rem;
}
.related-tags .rt-label {
  font-weight: 600;
  color: #01458e;
  margin-right: 0.5rem;
  white-space: nowrap;
}
.related-tags .tag {
  display: inline-block;
  padding: 0.35rem 0.85rem;
  background: #eef4fb;
  color: #01458e;
  border-radius: 16px;
  font-size: 0.875rem;
  text-decoration: none;
  border: 1px solid #d0e2f5;
  transition: background 0.2s, color 0.2s;
}
.related-tags .tag:hover {
  background: #01458e;
  color: #fff;
  border-color: #01458e;
}

/* Deep content feature: image-left, text-right */
.deep-feature {
  display: flex;
  gap: 32px;
  align-items: center;
  margin: 2rem 0;
}
.deep-feature-img {
  flex: 0 0 45%;
}
.deep-feature-img img {
  width: 100%;
  height: auto;
  border-radius: 8px;
  box-shadow: 0 2px 12px rgba(1, 69, 142, 0.12);
}
.deep-feature-text {
  flex: 1;
}
.deep-feature-text h3 {
  margin-top: 0;
  color: #01458e;
}
@media (max-width: 767px) {
  .deep-feature {
    flex-direction: column;
    gap: 16px;
  }
  .deep-feature-img {
    flex: none;
    width: 100%;
  }
}

/* Contact card grid (P0-1) */
.contact-methods{display:grid;grid-template-columns:repeat(2,1fr);gap:1rem;margin:1.5rem 0 0}
.contact-method{display:flex;align-items:flex-start;gap:0.85rem;background:#fff;border:1px solid var(--line);border-radius:0.5rem;padding:1rem 1.1rem;box-shadow:var(--shadow)}
.contact-method .cm-icon{font-size:1.5rem;line-height:1.2;flex:0 0 auto}
.contact-method .cm-label{font-size:0.78rem;font-weight:700;color:var(--muted);text-transform:uppercase;letter-spacing:0.05em}
.contact-method .cm-value{font-weight:600;color:var(--ink);word-break:break-all}
.contact-method .cm-note{font-size:0.78rem;color:var(--muted)}
@media(max-width:640px){.contact-methods{grid-template-columns:1fr}}

/* ==========================================================================
   News & Case card grids (image thumbnail + body)
   ========================================================================== */
.news-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px;margin:24px 0}
.news-card{background:#fff;border-radius:8px;overflow:hidden;box-shadow:0 2px 8px rgba(0,0,0,.08);transition:transform .2s,box-shadow .2s;display:flex;flex-direction:column}
.news-card:hover{transform:translateY(-4px);box-shadow:0 8px 24px rgba(0,0,0,.12)}
.news-card img{width:100%;height:180px;object-fit:cover;display:block}
.news-card-body{padding:16px;display:flex;flex-direction:column;flex:1}
.news-card-date{font-size:13px;color:#888;margin-bottom:8px}
.news-card h3{font-size:16px;margin:0 0 8px;line-height:1.4}
.news-card p{font-size:14px;color:#555;margin:0 0 12px;line-height:1.5}
.news-card .read-more{color:#01458e;font-weight:600;font-size:14px;text-decoration:none;margin-top:auto}
.news-card .read-more:hover{text-decoration:underline}
@media(max-width:1024px){.news-grid{grid-template-columns:repeat(2,1fr)}}
@media(max-width:600px){.news-grid{grid-template-columns:1fr}}

.case-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px;margin:24px 0}
.case-card{background:#fff;border-radius:8px;overflow:hidden;box-shadow:0 2px 8px rgba(0,0,0,.08);transition:transform .2s,box-shadow .2s;display:flex;flex-direction:column;text-decoration:none;color:inherit}
.case-card:hover{transform:translateY(-4px);box-shadow:0 8px 24px rgba(0,0,0,.12)}
.case-card img{width:100%;height:180px;object-fit:cover;display:block}
.case-card-body{padding:16px;display:flex;flex-direction:column;flex:1}
.case-card-region{display:inline-block;background:#e8f4fd;color:#01458e;font-size:12px;padding:2px 10px;border-radius:12px;margin-bottom:8px;align-self:flex-start}
.case-card h3{font-size:16px;margin:0 0 8px;line-height:1.4;color:#1a1a1a}
.case-card p{font-size:14px;color:#555;margin:0 0 12px;line-height:1.5}
.case-card .read-more{color:#01458e;font-weight:600;font-size:14px;text-decoration:none;margin-top:auto}
.case-card .read-more:hover{text-decoration:underline}
@media(max-width:1024px){.case-grid{grid-template-columns:repeat(2,1fr)}}
@media(max-width:600px){.case-grid{grid-template-columns:1fr}}

/* Centered link-row blocks (More Case Studies / Corporate Information / Latest News) */
.pd-section.section-center { text-align: center; max-width: 60rem; margin: 0 auto; padding-top: 2.5rem; padding-bottom: 2.5rem; }
.pd-section.section-center h2 { text-align: center; }
.pd-section.section-center p { max-width: 52rem; margin-left: auto; margin-right: auto; }
.pd-section.section-center .news-list { list-style: none; padding: 0; margin: 1.75rem auto 0; display: flex; flex-wrap: wrap; justify-content: center; gap: .5rem 1.4rem; max-width: 54rem; }
.pd-section.section-center .news-list li { margin: 0; }
.pd-section.section-center .news-list a { display: inline-block; padding: .45rem .95rem; border: 1px solid #d7dee6; border-radius: 4px; color: #1a3a5c; background: #f4f7fa; transition: .2s; }
.pd-section.section-center .news-list a:hover { background: #0b3d6b; color: #fff; border-color: #0b3d6b; }

/* ==========================================================================
   Language switcher (dropdown with flag + language name)
   ========================================================================== */
.lang-switcher { position: relative; }
.lang-current {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.4rem 0.65rem;
  background: #fff;
  border: 1px solid var(--line);
  border-radius: 0.375rem;
  color: var(--ink);
  font-size: 0.88rem;
  font-weight: 500;
  font-family: inherit;
  line-height: 1.2;
  white-space: nowrap;
  cursor: pointer;
  transition: border-color 0.2s ease, box-shadow 0.2s ease;
}
.lang-current:hover { border-color: var(--accent); color: var(--primary); }
.lang-current:focus-visible { outline: 2px solid var(--accent); outline-offset: 2px; }
.lang-flag {
  width: 20px;
  height: 15px;
  object-fit: cover;
  border-radius: 2px;
  flex: none;
  box-shadow: 0 0 0 1px rgba(0, 0, 0, 0.08);
}
.lang-caret {
  width: 0;
  height: 0;
  border-left: 4px solid transparent;
  border-right: 4px solid transparent;
  border-top: 5px solid var(--muted);
  transition: transform 0.2s ease;
}
.lang-switcher.open .lang-caret { transform: rotate(180deg); }
.lang-menu {
  position: absolute;
  top: calc(100% + 0.5rem);
  right: 0;
  min-width: 11.5rem;
  max-height: 22rem;
  overflow-y: auto;
  background: #fff;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  box-shadow: var(--shadow-hover);
  padding: 0.4rem 0;
  opacity: 0;
  visibility: hidden;
  transform: translateY(0.4rem);
  transition: all 0.2s ease;
  z-index: 200;
}
.lang-switcher.open .lang-menu { opacity: 1; visibility: visible; transform: translateY(0); }
.lang-menu li a {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  padding: 0.5rem 0.9rem;
  font-size: 0.88rem;
  color: var(--ink);
  white-space: nowrap;
}
.lang-menu li a:hover { background: var(--bg-soft); color: var(--primary); }
.lang-menu li.active a { background: var(--bg-soft); color: var(--primary); font-weight: 600; }
@media (max-width: 480px) {
  .lang-current .lang-name { display: none; }
}

/* ---------- Pagination CTA button (Next Page) ---------- */
/* .pagination a has higher specificity than .btn-primary; keep CTA text white */
.pagination a.btn-primary,
.pagination a.btn-primary:hover { color: #fff; }