/* =============================================
   LINS VALVE - Main Stylesheet
   Clean, Minimal Design
   ============================================= */

/* --- Variables --- */
:root {
  --black: #111111;
  --dark: #1a1a1a;
  --dark-gray: #2a2a2a;
  --navy: #0d2137;
  --navy-light: #1a3a5c;
  --text: #333333;
  --text-secondary: #666666;
  --text-light: #999999;
  --white: #ffffff;
  --off-white: #f8f8f8;
  --border: #e5e5e5;
  --accent: #c9a84c;
  --font-en: 'Inter', -apple-system, 'Segoe UI', sans-serif;
  --font-zh: 'Noto Sans TC', 'Microsoft JhengHei', sans-serif;
  --max-width: 1200px;
  --header-height: 72px;
}

/* --- Reset --- */
*, *::before, *::after {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

html { scroll-behavior: smooth; font-size: 120%; -webkit-text-size-adjust: 100%; }

body {
  font-family: var(--font-en);
  color: var(--text);
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  text-rendering: optimizeLegibility;
  overflow-x: hidden;
}

img { max-width: 100%; height: auto; display: block; }
a { text-decoration: none; color: inherit; }

.container {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 40px;
}

/* =============================================
   HEADER
   ============================================= */
.header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: var(--header-height);
  z-index: 1000;
  background: var(--white);
  border-bottom: 1px solid var(--border);
  transition: background 0.3s ease, box-shadow 0.3s ease;
}

.header .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 100%;
}

.header.scrolled {
  background: var(--white);
  box-shadow: 0 2px 20px rgba(0,0,0,0.06);
}

.logo {
  display: flex;
  align-items: center;
  gap: 14px;
}

.logo-name {
  font-size: 1.4rem;
  font-weight: 800;
  letter-spacing: 0.18em;
  color: var(--navy);
}

.logo-divider {
  width: 1px;
  height: 32px;
  background: var(--border);
}

.logo-sub {
  font-family: var(--font-zh);
  font-size: 0.74rem;
  color: var(--navy-light);
  letter-spacing: 0.08em;
  font-weight: 500;
  line-height: 1.5;
}

.logo-sub em {
  display: block;
  font-style: italic;
  font-family: var(--font-en);
  font-size: 0.8125rem;
  letter-spacing: 0.06em;
  color: var(--text-light);
  margin-top: 1px;
}

.nav-list {
  display: flex;
  list-style: none;
  gap: 32px;
}

.nav-list a {
  color: var(--navy-light);
  font-size: 0.88rem;
  font-weight: 600;
  letter-spacing: 0.03em;
  transition: color 0.2s;
  display: flex;
  align-items: center;
  gap: 6px;
}

.nav-list a:hover,
.nav-list a.active {
  color: var(--navy);
}

.nav-zh {
  font-family: var(--font-zh);
  font-size: 0.72rem;
  font-weight: 400;
  opacity: 0.65;
}

.nav-list a:hover .nav-zh,
.nav-list a.active .nav-zh {
  opacity: 0.85;
}

.mobile-menu-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 4px;
}

.mobile-menu-toggle span {
  width: 22px;
  height: 2px;
  background: var(--navy);
  transition: 0.3s;
  transform-origin: center;
}

.mobile-menu-toggle.active span:nth-child(1) {
  transform: translateY(7px) rotate(45deg);
}

.mobile-menu-toggle.active span:nth-child(2) {
  opacity: 0;
}

.mobile-menu-toggle.active span:nth-child(3) {
  transform: translateY(-7px) rotate(-45deg);
}

body.menu-open {
  overflow: hidden;
}

/* =============================================
   HERO
   ============================================= */
.hero {
  width: 100%;
  height: 100vh;
  position: relative;
  overflow: hidden;
  background: var(--black);
  display: flex;
  align-items: flex-end;
}

.hero-bg {
  position: absolute;
  inset: 0;
}

.hero-bg img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center 50%;
}

.hero-overlay {
  position: absolute;
  inset: 0;
  background:
    linear-gradient(
      to right,
      rgba(0, 0, 0, 0.75) 0%,
      rgba(0, 0, 0, 0.55) 30%,
      rgba(0, 0, 0, 0.15) 55%,
      transparent 75%
    ),
    linear-gradient(
      to top,
      rgba(0, 0, 0, 0.5) 0%,
      transparent 40%
    );
}

.hero-content {
  position: relative;
  z-index: 2;
  width: 100%;
  max-width: var(--max-width);
  padding-bottom: 330px;
  padding-left: 0;
  margin-left: 40px;
}

.hero-content h1 {
  font-size: 2.6rem;
  font-weight: 700;
  color: var(--white);
  line-height: 1.25;
  letter-spacing: -0.01em;
  margin-bottom: 0;
  max-width: 680px;
  text-shadow: 0 2px 20px rgba(0,0,0,0.5);
}

.hero-divider {
  width: 48px;
  height: 2px;
  background: rgba(255, 255, 255, 0.45);
  margin: 20px 0;
}

.hero-caption {
  font-size: 0.9rem;
  color: #ffffff;
  font-weight: 400;
  letter-spacing: 0.04em;
  margin-bottom: 8px;
  text-shadow: 0 1px 12px rgba(0,0,0,0.5);
}

.hero-caption-zh {
  font-family: var(--font-zh);
  font-size: 0.85rem;
  color: #ffffff;
  letter-spacing: 0.1em;
  text-shadow: 0 1px 12px rgba(0,0,0,0.5);
}

/* =============================================
   ABOUT
   ============================================= */
.about {
  background: #13293D;
  color: var(--white);
  padding: 50px 0;
}

.about-columns {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 80px;
}

.about h2 {
  font-size: 1.8rem;
  font-weight: 600;
  margin-bottom: 28px;
  letter-spacing: 0.02em;
}

.about-col:last-child h2 {
  font-family: var(--font-zh);
}

.about p {
  font-size: 1rem;
  line-height: 1.9;
  color: rgba(255,255,255,0.75);
  margin-bottom: 16px;
}

.about-col:last-child p {
  font-family: var(--font-zh);
  font-size: 0.95rem;
  color: rgba(255,255,255,0.85);
}

.about-factory-img {
  margin-top: 28px;
  border-radius: 8px;
  width: 100%;
  display: block;
  object-fit: cover;
}

/* =============================================
   TRUST BAR
   ============================================= */
.trust-bar {
  background: var(--white);
  padding: 48px 0;
  border-bottom: 1px solid var(--border);
}

.trust-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 0;
  text-align: center;
  align-items: start;
}

.trust-item {
  padding: 16px 24px;
  border-right: 1px solid var(--border);
}

.trust-item-visual {
  display: flex;
  flex-direction: column;
  align-items: center;
  padding-top: 16px;
}

.trust-item:last-child {
  border-right: none;
}

.trust-number {
  display: block;
  font-size: 2.33rem;
  font-weight: 800;
  color: var(--navy);
  letter-spacing: -0.02em;
  margin-bottom: 8px;
  white-space: nowrap;
}

.trust-label {
  font-size: 0.92rem;
  color: var(--text);
  font-weight: 500;
  line-height: 1.5;
  margin-top: auto;
  margin-bottom: 6px;
}

/* Trust item: unified visual style - already declared above */

.trust-icon {
  height: 80px;
  display: flex;
  align-items: center;
  margin-bottom: 10px;
}

.trust-icon svg {
  display: block;
}

.trust-label-zh {
  font-family: var(--font-zh);
  font-size: 0.79rem;
  color: var(--text-secondary);
  line-height: 1.6;
}

.trust-map-img {
  width: 210px;
  height: 80px;
  object-fit: contain;
  margin-bottom: 10px;
}

/* Trust item: Manufacturing */
.trust-mfg-title {
  font-size: 1.04rem;
  font-weight: 700;
  color: var(--text);
  margin-top: 24px;
  margin-bottom: 8px;
  line-height: 1.35;
}

.trust-mfg-sub {
  font-size: 0.79rem;
  font-weight: 500;
  color: var(--text-secondary);
  line-height: 1.5;
  margin-top: auto;
  margin-bottom: 6px;
}

/* Trust item: Certifications */
.trust-item-cert {
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
}

.trust-cert-title {
  font-size: 1.42rem;
  font-weight: 700;
  color: var(--navy);
  margin-top: 10px;
  margin-bottom: 14px;
}

.trust-cert-img {
  width: 100%;
  max-width: 240px;
  height: auto;
  margin-bottom: 14px;
}

.trust-cert-sub-zh {
  font-family: var(--font-zh);
  font-size: 0.73rem;
  color: var(--text-secondary);
}

/* =============================================
   MARKETS / APPLICATIONS
   ============================================= */
/* --- Client Logos Strip --- */
.client-logos {
  background: var(--white);
  padding: 14px 0 18px;
  text-align: center;
}

.client-logos-title {
  font-family: var(--font-zh);
  font-size: 0.7rem;
  color: var(--text-secondary);
  margin-bottom: 8px;
  margin-top: -5px;
  letter-spacing: 0.5px;
}

.client-logos-subtitle {
  font-size: 0.68rem;
  font-weight: 600;
  color: var(--navy);
  text-transform: uppercase;
  letter-spacing: 2px;
  margin-bottom: 8px;
}

.client-logos-row {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 36px;
  flex-wrap: wrap;
}

.client-logo-item {
  height: 40px;
  width: auto;
  object-fit: contain;
}

/* --- Applications / Markets --- */
.markets {
  background: var(--white);
  padding: 100px 0;
}

.markets-dark {
  background: var(--navy);
}

.markets-header {
  text-align: center;
  margin-bottom: 60px;
}

.markets-header h2 {
  font-size: 2rem;
  font-weight: 700;
  color: var(--navy);
  margin-bottom: 4px;
}

.markets-zh {
  font-family: var(--font-zh);
  font-size: 1rem;
  color: var(--text-light);
  margin-bottom: 16px;
}

.markets-header p {
  color: var(--text-secondary);
  font-size: 0.95rem;
}

.markets-sub-zh {
  font-family: var(--font-zh);
  font-size: 0.85rem;
  color: var(--text-light);
}

/* Dark variant text overrides */
.markets-dark .markets-header h2 { color: var(--white); }
.markets-dark .markets-zh { color: rgba(255,255,255,0.5); }
.markets-dark .markets-header p { color: rgba(255,255,255,0.7); }
.markets-dark .markets-sub-zh { color: rgba(255,255,255,0.5); }
.markets-dark .market-item h3 { color: var(--white); }
.markets-dark .market-item span { color: rgba(255,255,255,0.6); }

.markets-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 32px;
}

.market-item {
  text-align: center;
}

.market-img {
  width: 100%;
  aspect-ratio: 4/3;
  border-radius: 6px;
  overflow: hidden;
  margin-bottom: 16px;
}

.market-img img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.4s ease;
}

.market-item:hover .market-img img {
  transform: scale(1.05);
}

.market-item h3 {
  font-size: 0.95rem;
  font-weight: 600;
  margin-bottom: 2px;
}

.market-item span {
  font-family: var(--font-zh);
  font-size: 0.82rem;
  color: var(--text-light);
}

/* =============================================
   PRODUCTS LIST (horizontal strip)
   ============================================= */
.products-list-section {
  padding: 32px 0 20px;
  background: var(--white);
}

.products-list-section .container {
  max-width: 1500px;
}

.products-list-header {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 24px;
  margin-bottom: 40px;
}

.products-list-header h2 {
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--text);
  text-transform: uppercase;
  letter-spacing: 0.12em;
  white-space: nowrap;
}

.products-list-line {
  flex: 1;
  height: 1px;
  background: var(--border);
}

.products-list-header {
  margin-bottom: 4px;
}

.products-list-zh {
  text-align: center;
  font-family: var(--font-zh);
  font-size: 0.9rem;
  color: var(--text-light);
  margin: 0 0 16px;
  letter-spacing: 0.15em;
}

.products-carousel {
  display: flex;
  align-items: center;
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
  scrollbar-width: thin;
  scrollbar-color: #ccc transparent;
  padding-bottom: 8px;
}

.products-carousel::-webkit-scrollbar {
  height: 6px;
}

.products-carousel::-webkit-scrollbar-track {
  background: transparent;
}

.products-carousel::-webkit-scrollbar-thumb {
  background: #ccc;
  border-radius: 3px;
}

.products-list-track {
  display: flex;
  align-items: center;
  gap: 36px;
  padding: 10px 40px;
  flex-wrap: nowrap;
  margin: 0 auto;
}

.products-list-item {
  width: 200px;
  min-width: 200px;
  height: 200px;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}

.products-list-item img {
  max-width: 85%;
  max-height: 85%;
  object-fit: contain;
  transition: transform 0.3s ease;
}

.products-list-item img:hover {
  transform: scale(1.08);
}

/* =============================================
   CATALOG GRID (Albion-style product cards)
   ============================================= */
.catalog-section {
  padding: 80px 0;
  background: var(--white);
}

.catalog-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
}

.catalog-card {
  display: flex;
  flex-direction: column;
  background: var(--white);
  position: relative;
  overflow: hidden;
  transition: box-shadow 0.3s ease;
  cursor: pointer;
  box-shadow: 0 1px 4px rgba(0,0,0,0.06);
}

.catalog-card:hover {
  box-shadow: 0 6px 24px rgba(0,0,0,0.12);
}

.catalog-card-img {
  width: 100%;
  aspect-ratio: 1;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 16px;
  background: var(--white);
  overflow: hidden;
}

.catalog-card::before {
  content: '';
  position: absolute;
  left: 0;
  top: 25%;
  bottom: 0;
  width: 4px;
  background: var(--card-accent, #c0392b);
  z-index: 1;
}

.catalog-card-img img {
  width: 85%;
  height: 85%;
  object-fit: contain;
  transform: scale(1.5);
  transition: transform 0.4s ease;
}

.catalog-card:hover .catalog-card-img img {
  transform: scale(1.05);
}

.catalog-card-body {
  padding: 22px 24px 24px;
  background: #f0f0f0;
  flex: 1;
  display: flex;
  flex-direction: column;
}

.catalog-card-body h3 {
  font-size: 0.95rem;
  font-weight: 800;
  color: var(--text);
  margin-bottom: 2px;
}

.catalog-zh {
  font-family: var(--font-zh);
  font-size: 0.75rem;
  color: var(--text-light);
  display: block;
  margin-bottom: 0;
}

.catalog-divider {
  width: 50%;
  height: 1px;
  background: #ccc;
  margin: 8px 0;
}

.catalog-card-body p {
  font-size: 0.8rem;
  color: var(--text-secondary);
  line-height: 1.65;
  flex: 1;
}

.catalog-readmore {
  display: inline-block;
  margin-top: 6px;
  font-size: 0.8rem;
  font-weight: 700;
  color: var(--text);
  text-decoration: underline;
  text-underline-offset: 3px;
}

.catalog-card:hover .catalog-readmore {
  color: var(--navy);
}

/* outline light button for CTA section */
.btn-outline-light {
  display: inline-block;
  padding: 12px 28px;
  font-size: 0.85rem;
  font-weight: 500;
  border-radius: 6px;
  border: 1px solid rgba(255,255,255,0.3);
  color: rgba(255,255,255,0.8);
  background: transparent;
  transition: all 0.2s;
  cursor: pointer;
  font-family: var(--font-en);
}

.btn-outline-light:hover {
  border-color: var(--white);
  color: var(--white);
  background: rgba(255,255,255,0.08);
}

/* =============================================
   FOOTER
   ============================================= */
.footer {
  background: var(--black);
  color: rgba(255,255,255,0.6);
  padding: 60px 0 0;
  font-size: 0.85rem;
}

.footer-grid {
  display: grid;
  grid-template-columns: 1.5fr 1fr 1fr 1fr;
  gap: 48px;
  padding-bottom: 40px;
}

.footer-logo {
  font-size: 1rem;
  font-weight: 700;
  color: var(--white);
  letter-spacing: 0.12em;
  display: block;
  margin-bottom: 12px;
}

.footer-brand p {
  line-height: 1.7;
  margin-bottom: 4px;
}

.footer-zh {
  font-family: var(--font-zh);
  font-size: 0.8rem;
}

.footer-col h4 {
  color: var(--white);
  font-size: 0.8rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  margin-bottom: 16px;
}

.footer-col a {
  display: block;
  color: rgba(255,255,255,0.5);
  font-size: 0.84rem;
  padding: 3px 0;
  transition: color 0.2s;
}

.footer-col a:hover {
  color: var(--white);
}

.footer-col p {
  color: rgba(255,255,255,0.5);
  line-height: 1.7;
}

.footer-links {
  display: flex;
  flex-direction: column;
}

.footer-links a {
  color: rgba(255,255,255,0.5);
  font-size: 0.84rem;
  padding: 3px 0;
  transition: color 0.2s;
}

.footer-links a:hover {
  color: var(--white);
}

.footer h4 {
  color: var(--white);
  font-size: 0.8rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  margin-bottom: 16px;
}

.footer-contact-item {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  margin-bottom: 12px;
  color: rgba(255,255,255,0.5);
  font-size: 0.84rem;
}

.footer-contact-item svg {
  flex-shrink: 0;
  margin-top: 2px;
  color: rgba(255,255,255,0.4);
}

.footer-bottom {
  border-top: 1px solid rgba(255,255,255,0.1);
  padding: 20px 0;
  display: flex;
  justify-content: space-between;
  font-size: 0.78rem;
  color: rgba(255,255,255,0.3);
}

/* =============================================
   SUBPAGES: PAGE HERO
   ============================================= */
.page-hero {
  padding: 110px 0 40px;
  background: var(--dark);
  color: var(--white);
  text-align: center;
}

.page-hero h1 {
  font-size: 2.2rem;
  margin-bottom: 8px;
}

.page-hero .zh {
  font-family: var(--font-zh);
  font-size: 1.2rem;
  color: rgba(255,255,255,0.5);
}

.page-hero p:not(.zh) {
  color: rgba(255,255,255,0.55);
  max-width: 560px;
  margin: 14px auto 0;
  font-size: 0.95rem;
}

.page-label {
  display: inline-block;
  font-size: 0.75rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: rgba(255,255,255,0.5);
  margin-bottom: 12px;
}

/* =============================================
   SUBPAGES: PRODUCTS CATALOG
   ============================================= */
.products-catalog {
  padding: 80px 0;
}

.product-detail-card {
  display: grid;
  grid-template-columns: 1fr 1.4fr;
  gap: 48px;
  padding: 48px 0;
  border-bottom: 1px solid var(--border);
  align-items: start;
}

.product-detail-card:nth-child(even) {
  direction: rtl;
}

.product-detail-card:nth-child(even) > * {
  direction: ltr;
}

.product-detail-card:first-child {
  padding-top: 0;
}

.product-detail-card:last-child {
  border-bottom: none;
}

.product-detail-image {
  background: var(--off-white);
  border-radius: 12px;
  overflow: hidden;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 24px;
  min-height: 280px;
}

.product-detail-image img {
  max-width: 72%;
  max-height: 300px;
  object-fit: contain;
}

.product-detail-content h2 {
  font-size: 1.4rem;
  margin-bottom: 12px;
}

.product-detail-content h2 .zh {
  font-family: var(--font-zh);
  font-size: 0.95rem;
  font-weight: 400;
  color: var(--text-light);
  margin-left: 8px;
}

.product-highlight {
  font-size: 0.92rem;
  color: var(--text-secondary);
  margin-bottom: 4px;
}

.product-highlight-zh {
  font-family: var(--font-zh);
  font-size: 0.85rem;
  color: var(--text-light);
  margin-bottom: 20px;
}

.spec-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 14px;
  margin-bottom: 24px;
}

.spec-item {
  padding: 14px;
  background: var(--off-white);
  border-radius: 8px;
}

.spec-item h4 {
  font-size: 0.75rem;
  color: var(--text-light);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin-bottom: 6px;
}

.spec-item p {
  font-size: 0.84rem;
  color: var(--text-secondary);
}

.spec-item ul {
  list-style: none;
}

.spec-item ul li {
  font-size: 0.84rem;
  color: var(--text-secondary);
  padding: 2px 0 2px 12px;
  position: relative;
}

.spec-item ul li::before {
  content: '';
  position: absolute;
  left: 0;
  top: 10px;
  width: 4px;
  height: 4px;
  background: var(--text-light);
  border-radius: 50%;
}

.btn {
  display: inline-block;
  padding: 12px 28px;
  font-size: 0.85rem;
  font-weight: 500;
  border-radius: 6px;
  transition: all 0.2s;
  cursor: pointer;
  border: none;
  font-family: var(--font-en);
}

.btn-primary {
  background: var(--dark);
  color: var(--white);
}

.btn-primary:hover {
  background: var(--text);
}

.btn-full {
  width: 100%;
  text-align: center;
}

/* =============================================
   SUBPAGES: CONTACT
   ============================================= */
.contact-hero {
  position: relative;
  height: 450px;
  display: flex;
  align-items: center;
  overflow: hidden;
}

.contact-hero-bg {
  position: absolute;
  inset: 0;
}

.contact-hero-bg img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.contact-hero-overlay {
  position: absolute;
  inset: 0;
  background: rgba(0,0,0,0.6);
}

.contact-hero .container {
  position: relative;
  z-index: 2;
}

.contact-hero-content {
  color: var(--white);
  text-align: center;
  padding-top: 50px;
}

.contact-hero-content h1 {
  font-size: 2.2rem;
  margin-bottom: 8px;
}

.contact-hero-content .zh {
  font-family: var(--font-zh);
  font-size: 1.2rem;
  color: rgba(255,255,255,0.5);
}

.contact-hero-content p:not(.zh) {
  color: rgba(255,255,255,0.55);
  margin-top: 10px;
}

.contact-section {
  padding: 80px 0;
}

.contact-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 64px;
}

.contact-section h2 {
  font-size: 1.4rem;
  margin-bottom: 24px;
}

.contact-section h2 .zh {
  font-family: var(--font-zh);
  font-size: 0.95rem;
  font-weight: 400;
  color: var(--text-light);
  margin-left: 8px;
}

.contact-info-card {
  display: flex;
  align-items: flex-start;
  gap: 16px;
  padding: 18px;
  background: var(--off-white);
  border-radius: 8px;
  margin-bottom: 12px;
}

.contact-info-icon {
  width: 40px;
  height: 40px;
  min-width: 40px;
  background: var(--white);
  border-radius: 8px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--text);
}

.contact-info-card h4 {
  font-size: 0.85rem;
  margin-bottom: 4px;
}

.contact-info-card p {
  font-size: 0.84rem;
  color: var(--text-secondary);
  line-height: 1.6;
}

.contact-form-wrapper {
  background: var(--off-white);
  padding: 32px;
  border-radius: 12px;
}

.contact-form-wrapper h2 {
  margin-bottom: 20px;
}

.contact-form {
  display: flex;
  flex-direction: column;
  gap: 14px;
}

.form-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 14px;
}

.form-group {
  display: flex;
  flex-direction: column;
  gap: 5px;
}

.form-group label {
  font-size: 0.82rem;
  font-weight: 500;
  color: var(--text-secondary);
}

.form-group input,
.form-group textarea,
.form-group select {
  padding: 11px 14px;
  border: 1px solid var(--border);
  border-radius: 6px;
  font-size: 0.88rem;
  font-family: var(--font-en);
  background: var(--white);
  transition: border-color 0.2s;
}

.form-group input:focus,
.form-group textarea:focus,
.form-group select:focus {
  outline: none;
  border-color: var(--text);
}

.form-group textarea {
  resize: vertical;
  min-height: 110px;
}

/* =============================================
   SUBPAGES: NEWS
   ============================================= */
.news-section {
  padding: 60px 0 80px;
}

.news-filters {
  display: flex;
  gap: 8px;
  margin-bottom: 40px;
  flex-wrap: wrap;
}

.news-filter {
  padding: 8px 20px;
  font-size: 0.82rem;
  font-weight: 500;
  font-family: var(--font-en);
  border: 1px solid var(--border);
  border-radius: 4px;
  background: var(--white);
  color: var(--text-secondary);
  cursor: pointer;
  transition: all 0.2s;
}

.news-filter:hover {
  border-color: var(--text);
  color: var(--text);
}

.news-filter.active {
  background: var(--navy);
  color: var(--white);
  border-color: var(--navy);
}

.news-list {
  display: flex;
  flex-direction: column;
  gap: 0;
}

.news-card {
  display: grid;
  grid-template-columns: 220px 1fr;
  gap: 32px;
  padding: 32px 0;
  border-bottom: 1px solid var(--border);
  align-items: start;
  transition: opacity 0.2s;
}

.news-card:first-child {
  padding-top: 0;
}

.news-card:hover {
  opacity: 0.85;
}

.news-card-img {
  width: 220px;
  aspect-ratio: 3/2;
  border-radius: 6px;
  overflow: hidden;
  background: var(--off-white);
  flex-shrink: 0;
}

.news-card-img img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.news-card-content {
  min-width: 0;
}

.news-tag {
  display: inline-block;
  font-size: 0.7rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--navy);
  background: rgba(13, 33, 55, 0.06);
  padding: 3px 10px;
  border-radius: 3px;
  margin-bottom: 10px;
}

.news-card-content h3 {
  font-size: 1.1rem;
  font-weight: 600;
  color: var(--text);
  margin-bottom: 6px;
  line-height: 1.4;
}

.news-date {
  font-size: 0.78rem;
  color: var(--text-light);
  margin-bottom: 10px;
}

.news-card-content > p:last-child {
  font-size: 0.88rem;
  color: var(--text-secondary);
  line-height: 1.7;
}

/* =============================================
   CTA SECTION (for subpages)
   ============================================= */
.cta-section {
  padding: 60px 0;
  background: var(--dark);
  text-align: center;
  color: var(--white);
}

.cta-section h2 {
  font-size: 1.6rem;
  margin-bottom: 4px;
}

.cta-section .zh {
  font-family: var(--font-zh);
  font-size: 1rem;
  color: rgba(255,255,255,0.5);
  margin-bottom: 10px;
}

.cta-section p {
  color: rgba(255,255,255,0.5);
  max-width: 500px;
  margin: 0 auto 24px;
  font-size: 0.92rem;
}

.cta-buttons {
  display: flex;
  justify-content: center;
  gap: 16px;
}

.cta-section .btn-primary {
  background: var(--white);
  color: var(--dark);
}

.cta-section .btn-primary:hover {
  background: var(--off-white);
}

/* =============================================
   SUBPAGES: ODM SERVICE
   ============================================= */
.odm-process {
  padding: 60px 0;
  background: var(--white);
}

.odm-process-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 32px;
}

.odm-step {
  padding: 0 12px;
  border-right: 1px solid var(--border);
}

.odm-step:last-child {
  border-right: none;
}

.odm-step-num {
  display: block;
  font-size: 2rem;
  font-weight: 800;
  color: var(--border);
  letter-spacing: -0.02em;
  margin-bottom: 8px;
}

.odm-step h3 {
  font-size: 0.95rem;
  font-weight: 700;
  color: var(--text);
  margin-bottom: 8px;
}

.odm-step p {
  font-size: 0.84rem;
  color: var(--text-secondary);
  line-height: 1.7;
}

.odm-capabilities {
  padding: 60px 0;
  background: var(--off-white);
}

.odm-cap-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
}

.odm-cap-item {
  background: var(--white);
  padding: 28px 24px;
  border-radius: 8px;
}

.odm-cap-item h3 {
  font-size: 0.9rem;
  font-weight: 700;
  margin-bottom: 14px;
  color: var(--text);
}

.odm-cap-item ul {
  list-style: none;
}

.odm-cap-item ul li {
  font-size: 0.84rem;
  color: var(--text-secondary);
  padding: 4px 0 4px 14px;
  position: relative;
  line-height: 1.6;
}

.odm-cap-item ul li::before {
  content: '';
  position: absolute;
  left: 0;
  top: 11px;
  width: 4px;
  height: 4px;
  background: var(--text-light);
  border-radius: 50%;
}

.odm-form-section {
  padding: 80px 0;
  background: var(--white);
}

.odm-form-header {
  text-align: center;
  margin-bottom: 40px;
}

.odm-form-header h2 {
  font-size: 1.6rem;
  margin-bottom: 8px;
}

.odm-form-header p {
  color: var(--text-secondary);
  font-size: 0.92rem;
}

.odm-form-container {
  max-width: 900px;
  margin: 0 auto;
  background: var(--off-white);
  padding: 36px;
  border-radius: 12px;
}

.form-row-3 {
  grid-template-columns: 1fr 1fr 1fr !important;
}

/* =============================================
   SCROLL ANIMATIONS
   ============================================= */
.animate-on-scroll {
  opacity: 0;
  transform: translateY(20px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}

.animate-on-scroll.visible {
  opacity: 1;
  transform: translateY(0);
}

.animate-on-scroll.delay-1 { transition-delay: 0.1s; }
.animate-on-scroll.delay-2 { transition-delay: 0.2s; }

/* =============================================
   RESPONSIVE
   ============================================= */
@media (max-width: 1366px) {
  .nav-list { gap: 20px; }
  .nav-list a { font-size: 0.84rem; }
  .trust-mfg-title { font-size: 0.95rem; }
  .trust-number { font-size: 2rem; }
  .trust-label { font-size: 0.85rem; }
  .trust-mfg-sub { font-size: 0.75rem; }
  .trust-label-zh { font-size: 0.74rem; }
}

@media (max-width: 1024px) {
  .about-columns { grid-template-columns: 1fr; gap: 48px; }
  .markets-grid { grid-template-columns: repeat(2, 1fr); }
  .products-grid { grid-template-columns: repeat(2, 1fr); gap: 12px; }
  .footer-grid { grid-template-columns: 1fr 1fr; gap: 32px; }
  .contact-grid { grid-template-columns: 1fr; }
  .product-detail-card { grid-template-columns: 1fr; gap: 24px; }
  .product-detail-card:nth-child(even) { direction: ltr; }
  .info-preview-grid { grid-template-columns: repeat(2, 1fr); }
  .catalog-grid { grid-template-columns: repeat(2, 1fr); }
  .odm-process-grid { grid-template-columns: repeat(2, 1fr); }
  .odm-step { border-right: none; border-bottom: 1px solid var(--border); padding-bottom: 20px; }
  .odm-step:last-child { border-bottom: none; }
  .odm-cap-grid { grid-template-columns: repeat(2, 1fr); }
  .form-row-3 { grid-template-columns: 1fr 1fr !important; }
  .products-list-item { width: 170px; min-width: 170px; height: 170px; }
  .products-list-track { gap: 28px; }
}

@media (max-width: 768px) {
  :root { --header-height: 56px; }
  html { font-size: 100%; }

  .container { padding: 0 20px; }

  .main-nav { display: none; }
  .mobile-menu-toggle { display: flex; padding: 10px; }

  .main-nav.open {
    display: flex;
    position: fixed;
    top: var(--header-height);
    left: 0;
    right: 0;
    bottom: 0;
    background: var(--white);
    z-index: 999;
    padding: 16px 20px;
    overflow-y: auto;
  }

  .main-nav.open .nav-list {
    flex-direction: column;
    width: 100%;
    gap: 0;
  }

  .main-nav.open .nav-list a {
    font-size: 1.1rem;
    padding: 16px 0;
    display: block;
    border-bottom: 1px solid var(--border);
    color: var(--navy);
    min-height: 48px;
  }

  .logo-sub { font-size: 0.65rem; }
  .logo-sub em { font-size: 0.725rem; }
  .logo-name { font-size: 1.15rem; }
  .logo { gap: 10px; }
  .logo-divider { height: 26px; }

  .hero { height: 85vh; }
  .hero-content { padding-bottom: 60px; margin-left: 20px; }
  .hero-content h1 { font-size: 1.6rem; max-width: 72%; }
  .hero-caption { font-size: 0.82rem; }
  .hero-caption-zh { font-size: 0.78rem; }
  .hero-divider { margin: 14px 0; }
  .hero-bg img { object-position: 70% 45%; }

  .client-logos { padding: 16px 0 12px; overflow: hidden; }
  .client-logos-row {
    gap: 24px;
    flex-wrap: nowrap;
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
    padding: 0 20px 8px;
    justify-content: flex-start;
    scrollbar-width: none;
  }
  .client-logos-row::-webkit-scrollbar { display: none; }
  .client-logo-item { height: 30px; flex-shrink: 0; }
  .client-logos-title { font-size: 0.75rem; }
  .client-logos-subtitle { font-size: 0.7rem; margin-bottom: 6px; }

  .about { padding: 48px 0; }
  .about h2 { font-size: 1.4rem; }
  .about p { font-size: 0.9rem; }
  .about-col:last-child p { font-size: 0.88rem; }

  .trust-bar { padding: 32px 0; }
  .trust-grid { grid-template-columns: repeat(2, 1fr); gap: 0; }
  .trust-item { padding: 20px 16px; border-right: none; border-bottom: 1px solid var(--border); }
  .trust-item:nth-child(odd) { border-right: 1px solid var(--border); }
  .trust-item:nth-child(n+3) { border-bottom: none; }
  .trust-number { font-size: 1.8rem; }
  .trust-mfg-title { font-size: 0.9rem; }
  .trust-mfg-sub { white-space: normal; font-size: 0.72rem; }
  .trust-map-img { width: 160px; height: 72px; }

  .markets { padding: 48px 0; }
  .markets-header { margin-bottom: 32px; }
  .markets-header h2 { font-size: 1.4rem; }
  .markets-grid { grid-template-columns: repeat(2, 1fr); gap: 16px; }
  .market-item h3 { font-size: 0.85rem; }
  .market-item span { font-size: 0.75rem; }

  .products-list-section { padding: 24px 0 16px; }
  .products-list-track { gap: 24px; padding: 10px 20px 16px; }
  .products-list-item { width: 150px; min-width: 150px; height: 150px; }

  .products { padding: 48px 0; }
  .products-header h2 { font-size: 1.4rem; }
  .products-grid { grid-template-columns: repeat(2, 1fr); gap: 10px; }
  .product-item-label { padding: 12px 16px; }

  .footer { padding: 40px 0 0; }
  .footer-grid { grid-template-columns: 1fr; gap: 24px; }
  .footer-bottom { flex-direction: column; gap: 6px; text-align: center; }

  .news-card { grid-template-columns: 140px 1fr; gap: 16px; padding: 20px 0; }
  .news-card-img { width: 140px; }
  .news-card-content h3 { font-size: 0.95rem; }
  .form-row { grid-template-columns: 1fr; }
  .page-hero { padding: 100px 0 48px; }
  .page-hero h1 { font-size: 1.5rem; }
  .contact-hero { height: 280px; }
  .contact-hero-content { padding-top: 40px; }
  .contact-hero-content h1 { font-size: 1.5rem; }
  .contact-form-wrapper { padding: 24px 20px; }
}

@media (max-width: 480px) {
  .container { padding: 0 16px; }

  .hero { height: 75vh; }
  .hero-content { padding-bottom: 48px; margin-left: 16px; }
  .hero-content h1 { font-size: 1.25rem; line-height: 1.35; }
  .hero-caption { font-size: 0.78rem; }
  .hero-caption-zh { font-size: 0.72rem; }

  .trust-grid { grid-template-columns: 1fr; }
  .trust-item { border-right: none !important; border-bottom: 1px solid var(--border); padding: 20px 16px; }
  .trust-item:last-child { border-bottom: none; }
  .trust-number { font-size: 1.6rem; }
  .trust-map-img { width: 140px; height: 63px; }
  .trust-icon { height: 60px; }
  .trust-icon svg { width: 80px; height: auto; }

  .about h2 { font-size: 1.25rem; }
  .about-columns { gap: 36px; }

  .markets-grid { grid-template-columns: 1fr; }
  .markets-header h2 { font-size: 1.25rem; }

  .products-list-track { gap: 16px; padding: 10px 16px; }
  .products-list-item { width: 120px; min-width: 120px; height: 120px; }
  .products-grid { grid-template-columns: 1fr; }

  .client-logo-item { height: 24px; }
  .client-logos-row { gap: 20px; padding: 0 16px 8px; }

  .news-card { grid-template-columns: 1fr; gap: 12px; }
  .news-card-img { width: 100%; }
  .spec-grid { grid-template-columns: 1fr; }
  .info-preview-grid { grid-template-columns: 1fr; }
  .catalog-grid { grid-template-columns: 1fr; }
  .odm-process-grid { grid-template-columns: 1fr; }
  .odm-cap-grid { grid-template-columns: 1fr; }
  .form-row-3 { grid-template-columns: 1fr !important; }

  .footer-grid { gap: 20px; }
  .footer-col h4 { margin-bottom: 10px; }
}

/* =============================================
   LIQUID COOLING LANDING PAGE
   ============================================= */

/* --- Accent button --- */
.btn-accent {
  display: inline-block;
  padding: 14px 32px;
  font-size: 0.9rem;
  font-weight: 600;
  border-radius: 6px;
  border: none;
  background: #2563eb;
  color: var(--white);
  cursor: pointer;
  font-family: var(--font-en);
  transition: all 0.2s;
  letter-spacing: 0.01em;
}

.btn-accent:hover {
  background: #1d4ed8;
  transform: translateY(-1px);
  box-shadow: 0 4px 16px rgba(37, 99, 235, 0.3);
}

/* --- Section label --- */
.section-label {
  display: inline-block;
  font-size: 0.72rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  color: #2563eb;
  margin-bottom: 10px;
}

.text-zh {
  font-family: var(--font-zh);
  font-size: 0.85rem;
  color: var(--text-light);
  display: block;
  margin-top: 4px;
}

/* --- LC Hero --- */
.lc-hero {
  position: relative;
  min-height: 100vh;
  display: flex;
  align-items: center;
  overflow: hidden;
}

.lc-hero-bg {
  position: absolute;
  inset: 0;
}

.lc-hero-bg img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.lc-hero-overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, rgba(0,0,0,0.78) 0%, rgba(0,0,0,0.45) 100%);
}

.lc-hero .container {
  position: relative;
  z-index: 2;
}

.lc-hero-content {
  max-width: 720px;
  padding-top: 80px;
}

.lc-hero-content .page-label {
  color: #60a5fa;
}

.lc-hero-content h1 {
  font-size: 2.8rem;
  font-weight: 800;
  color: var(--white);
  line-height: 1.2;
  margin-bottom: 20px;
  letter-spacing: -0.01em;
}

.lc-hero-sub {
  font-size: 1.05rem;
  color: rgba(255,255,255,0.75);
  line-height: 1.7;
  margin-bottom: 8px;
}

.lc-hero-zh {
  font-family: var(--font-zh);
  font-size: 0.88rem;
  color: rgba(255,255,255,0.4);
  margin-bottom: 32px;
}

.lc-hero-cta {
  display: flex;
  gap: 14px;
  flex-wrap: wrap;
}

/* --- LC Intro --- */
.lc-intro {
  padding: 100px 0;
  background: var(--white);
}

.lc-intro-grid {
  display: grid;
  grid-template-columns: 1.2fr 1fr;
  gap: 80px;
  align-items: start;
}

.lc-intro-text h2 {
  font-size: 1.8rem;
  font-weight: 700;
  margin-bottom: 20px;
  color: var(--text);
}

.lc-intro-text p {
  font-size: 0.92rem;
  color: var(--text-secondary);
  line-height: 1.8;
  margin-bottom: 14px;
}

.lc-intro-stats {
  display: flex;
  flex-direction: column;
  gap: 24px;
}

.lc-stat {
  padding: 28px;
  background: var(--off-white);
  border-radius: 10px;
  border-left: 4px solid #2563eb;
}

.lc-stat-number {
  display: block;
  font-size: 2rem;
  font-weight: 800;
  color: var(--text);
  letter-spacing: -0.02em;
  margin-bottom: 4px;
}

.lc-stat-label {
  font-size: 0.85rem;
  color: var(--text-secondary);
  display: block;
}

.lc-stat-zh {
  font-family: var(--font-zh);
  font-size: 0.78rem;
  color: var(--text-light);
  display: block;
  margin-top: 2px;
}

/* --- LC Section Header --- */
.lc-section-header {
  text-align: center;
  max-width: 640px;
  margin: 0 auto 60px;
}

.lc-section-header h2 {
  font-size: 1.8rem;
  font-weight: 700;
  margin-bottom: 12px;
  color: var(--text);
}

.lc-section-header p {
  font-size: 0.92rem;
  color: var(--text-secondary);
  line-height: 1.7;
}

/* --- LC Application --- */
.lc-application {
  padding: 100px 0;
  background: var(--off-white);
}

.lc-app-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
}

.lc-app-card {
  background: var(--white);
  padding: 32px 24px;
  border-radius: 10px;
  border-top: 3px solid #2563eb;
}

.lc-app-num {
  font-size: 1.6rem;
  font-weight: 800;
  color: var(--border);
  margin-bottom: 12px;
}

.lc-app-card h3 {
  font-size: 0.95rem;
  font-weight: 700;
  color: var(--text);
  margin-bottom: 4px;
}

.lc-app-zh {
  font-family: var(--font-zh);
  font-size: 0.78rem;
  color: var(--text-light);
  display: block;
  margin-bottom: 12px;
}

.lc-app-card p {
  font-size: 0.84rem;
  color: var(--text-secondary);
  line-height: 1.7;
}

/* --- LC Why SS316 --- */
.lc-why-ss316 {
  padding: 100px 0;
  background: var(--white);
}

.lc-compare-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 32px;
  max-width: 900px;
  margin: 0 auto;
}

.lc-compare-card {
  padding: 36px 32px;
  border-radius: 12px;
  background: var(--off-white);
  border: 1px solid var(--border);
}

.lc-compare-winner {
  background: #f0f5ff;
  border-color: #2563eb;
  border-width: 2px;
}

.lc-compare-card h3 {
  font-size: 1.3rem;
  font-weight: 700;
  margin-bottom: 6px;
}

.lc-compare-badge {
  display: inline-block;
  font-size: 0.72rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: #2563eb;
  background: rgba(37, 99, 235, 0.1);
  padding: 4px 10px;
  border-radius: 4px;
  margin-bottom: 20px;
}

.lc-compare-caution {
  color: #b45309;
  background: rgba(180, 83, 9, 0.1);
}

.lc-compare-card ul {
  list-style: none;
}

.lc-compare-card ul li {
  font-size: 0.84rem;
  color: var(--text-secondary);
  padding: 6px 0 6px 16px;
  position: relative;
  line-height: 1.6;
}

.lc-compare-card ul li::before {
  content: '';
  position: absolute;
  left: 0;
  top: 13px;
  width: 5px;
  height: 5px;
  border-radius: 50%;
  background: var(--text-light);
}

.lc-compare-winner ul li::before {
  background: #2563eb;
}

/* --- LC Specs --- */
.lc-specs {
  padding: 100px 0;
  background: var(--dark);
  color: var(--white);
}

.lc-specs .lc-section-header h2 {
  color: var(--white);
}

.lc-specs .lc-section-header p {
  color: rgba(255,255,255,0.55);
}

.lc-specs .section-label {
  color: #60a5fa;
}

.lc-product-cards {
  display: flex;
  flex-direction: column;
  gap: 48px;
}

.lc-product-card {
  display: grid;
  grid-template-columns: 1fr 1.6fr;
  gap: 48px;
  background: rgba(255,255,255,0.04);
  border: 1px solid rgba(255,255,255,0.08);
  border-radius: 12px;
  overflow: hidden;
}

.lc-product-img {
  background: rgba(255,255,255,0.06);
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 40px;
  min-height: 300px;
}

.lc-product-img img {
  max-width: 72%;
  max-height: 260px;
  object-fit: contain;
}

.lc-product-info {
  padding: 36px 36px 36px 0;
}

.lc-product-info h3 {
  font-size: 1.3rem;
  font-weight: 700;
  margin-bottom: 4px;
}

.lc-product-info h3 .text-zh {
  font-size: 0.85rem;
  color: rgba(255,255,255,0.4);
  display: inline;
  margin-left: 8px;
}

.lc-product-desc {
  font-size: 0.88rem;
  color: rgba(255,255,255,0.6);
  line-height: 1.7;
  margin: 12px 0 24px;
}

.lc-spec-table {
  border-top: 1px solid rgba(255,255,255,0.1);
}

.lc-spec-row {
  display: flex;
  justify-content: space-between;
  padding: 10px 0;
  border-bottom: 1px solid rgba(255,255,255,0.06);
  font-size: 0.84rem;
}

.lc-spec-row span:first-child {
  color: rgba(255,255,255,0.45);
}

.lc-spec-row span:last-child {
  color: rgba(255,255,255,0.85);
  font-weight: 500;
  text-align: right;
}

/* --- LC Quality --- */
.lc-quality {
  padding: 100px 0;
  background: var(--white);
}

.lc-quality-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 32px;
}

.lc-quality-item {
  text-align: center;
  padding: 32px 20px;
  border-radius: 10px;
  background: var(--off-white);
}

.lc-quality-icon {
  color: #2563eb;
  margin-bottom: 16px;
}

.lc-quality-item h3 {
  font-size: 0.95rem;
  font-weight: 700;
  margin-bottom: 4px;
}

.lc-quality-item .text-zh {
  text-align: center;
  margin-bottom: 12px;
}

.lc-quality-item p {
  font-size: 0.82rem;
  color: var(--text-secondary);
  line-height: 1.7;
}

/* --- LC Why LINS --- */
.lc-why-lins {
  padding: 100px 0;
  background: var(--off-white);
}

.lc-why-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 32px;
}

.lc-why-item {
  padding: 32px 24px;
  background: var(--white);
  border-radius: 10px;
}

.lc-why-num {
  display: block;
  font-size: 2.2rem;
  font-weight: 800;
  color: #2563eb;
  letter-spacing: -0.02em;
  margin-bottom: 8px;
}

.lc-why-item h3 {
  font-size: 0.95rem;
  font-weight: 700;
  margin-bottom: 8px;
}

.lc-why-item p {
  font-size: 0.84rem;
  color: var(--text-secondary);
  line-height: 1.7;
  margin-bottom: 6px;
}

.lc-why-item .text-zh {
  font-size: 0.78rem;
}

/* --- LC CTA --- */
.lc-cta {
  padding: 80px 0;
  background: var(--dark);
  text-align: center;
}

.lc-cta-content h2 {
  font-size: 1.8rem;
  font-weight: 700;
  color: var(--white);
  margin-bottom: 4px;
}

.lc-cta-content .text-zh {
  color: rgba(255,255,255,0.4);
  text-align: center;
  margin-bottom: 10px;
}

.lc-cta-content > p:not(.text-zh):not(.lc-cta-note) {
  color: rgba(255,255,255,0.55);
  font-size: 0.92rem;
  max-width: 500px;
  margin: 0 auto 28px;
}

.lc-cta-buttons {
  display: flex;
  justify-content: center;
  gap: 14px;
  flex-wrap: wrap;
  margin-bottom: 24px;
}

.lc-cta-note {
  font-size: 0.78rem;
  color: rgba(255,255,255,0.3);
}

/* --- LC Responsive --- */
@media (max-width: 1024px) {
  .lc-hero-content h1 { font-size: 2.2rem; }
  .lc-intro-grid { grid-template-columns: 1fr; gap: 48px; }
  .lc-app-grid { grid-template-columns: repeat(2, 1fr); }
  .lc-compare-grid { grid-template-columns: 1fr; }
  .lc-product-card { grid-template-columns: 1fr; }
  .lc-product-info { padding: 24px 32px 32px; }
  .lc-quality-grid { grid-template-columns: repeat(2, 1fr); }
  .lc-why-grid { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 768px) {
  .lc-hero { min-height: 75vh; }
  .lc-hero-content { padding-top: 60px; }
  .lc-hero-content h1 { font-size: 1.5rem; }
  .lc-hero-sub { font-size: 0.88rem; }
  .lc-hero-zh { font-size: 0.8rem; }
  .lc-intro { padding: 48px 0; }
  .lc-intro-text h2 { font-size: 1.4rem; }
  .lc-application { padding: 48px 0; }
  .lc-why-ss316 { padding: 48px 0; }
  .lc-specs { padding: 48px 0; }
  .lc-quality { padding: 48px 0; }
  .lc-why-lins { padding: 48px 0; }
  .lc-cta { padding: 48px 0; }
  .lc-cta-content h2 { font-size: 1.4rem; }
  .lc-section-header h2 { font-size: 1.3rem; }
  .lc-section-header { margin-bottom: 32px; }
  .lc-product-img { min-height: 180px; padding: 20px; }
  .lc-product-info { padding: 20px; }
  .lc-product-info h3 { font-size: 1.1rem; }
  .lc-stat { padding: 20px; }
  .lc-stat-number { font-size: 1.6rem; }
  .lc-compare-card { padding: 24px 20px; }
}

@media (max-width: 480px) {
  .lc-hero-content h1 { font-size: 1.25rem; }
  .lc-app-grid { grid-template-columns: 1fr; }
  .lc-quality-grid { grid-template-columns: 1fr; }
  .lc-why-grid { grid-template-columns: 1fr; }
  .lc-hero-cta { flex-direction: column; }
  .lc-hero-cta .btn { text-align: center; }
  .lc-cta-buttons { flex-direction: column; align-items: center; }
  .lc-section-header h2 { font-size: 1.15rem; }
  .lc-product-img { min-height: 150px; }
}

/* =============================================
   PRODUCT DETAIL PAGE
   ============================================= */

/* Breadcrumb */
.breadcrumb {
  padding: 16px 0;
  font-size: 0.75rem;
  color: var(--text-light);
  letter-spacing: 0.03em;
  margin-top: var(--header-height);
}

.breadcrumb a {
  color: var(--text-secondary);
  transition: color 0.2s;
}

.breadcrumb a:hover { color: var(--navy); }
.breadcrumb span { margin: 0 6px; color: var(--border); }

/* Product Detail Layout */
.pd-section {
  padding: 0 0 80px;
}

.pd-layout {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 60px;
  align-items: start;
}

/* Product Image Gallery */
.pd-gallery {
  position: static;
}

.pd-main-img {
  width: 100%;
  aspect-ratio: 1;
  background: var(--white);
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
  margin-bottom: 12px;
}

.pd-main-img img {
  max-width: 100%;
  max-height: 100%;
  object-fit: contain;
}

.pd-thumbs {
  display: flex;
  gap: 8px;
}

.pd-thumb {
  width: 64px;
  height: 64px;
  border: 2px solid var(--border);
  border-radius: 6px;
  cursor: pointer;
  overflow: hidden;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--off-white);
  transition: border-color 0.2s;
}

.pd-thumb:hover,
.pd-thumb.active {
  border-color: var(--navy);
}

.pd-thumb img {
  max-width: 80%;
  max-height: 80%;
  object-fit: contain;
}

/* Product Info */
.pd-info {
  padding-top: 8px;
}

.pd-title {
  font-size: 1.6rem;
  font-weight: 700;
  color: var(--navy);
  line-height: 1.3;
  margin-bottom: 4px;
}

.pd-title-zh {
  font-family: var(--font-zh);
  font-size: 1rem;
  color: var(--text-secondary);
  margin-bottom: 24px;
}

.pd-specs {
  margin-bottom: 32px;
}

.pd-section-title {
  font-size: 0.78rem;
  font-weight: 700;
  color: var(--white);
  text-decoration: none;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  background: var(--navy);
  padding: 8px 14px;
  margin: 32px 0 0;
  display: inline-block;
}

.pd-spec-row {
  display: flex;
  padding: 10px 0;
  border-bottom: 1px solid var(--border);
  font-size: 0.85rem;
}

.pd-spec-row:first-child {
  border-top: 1px solid var(--border);
}

.pd-spec-label {
  width: 140px;
  flex-shrink: 0;
  font-weight: 600;
  color: var(--text);
}

.pd-spec-value {
  color: var(--text-secondary);
  line-height: 1.6;
}

.pd-material-tag {
  display: inline-block;
  font-weight: 700;
  color: var(--navy);
  margin-right: 8px;
}

.pd-material-std {
  font-size: 0.78rem;
  color: var(--text-light);
}

.pd-spec-zh {
  display: block;
  font-family: var(--font-zh);
  font-size: 0.75rem;
  color: var(--text-light);
  margin-top: 2px;
}

.pd-section-title .pd-section-zh {
  font-family: var(--font-zh);
  font-size: 0.75rem;
  font-weight: 400;
  text-transform: none;
  letter-spacing: 0;
  margin-left: 8px;
  opacity: 0.8;
}

/* Product Detail - Extended Sections */
.pd-extended {
  margin-top: 40px;
}

.pd-extended-block {
  padding: 24px 28px;
  border-radius: 12px;
  margin-bottom: 16px;
}

.pd-extended-block.light {
  background: #f5f5f5;
}

.pd-extended-block.dark {
  background: #e8e8e8;
}

.pd-extended-block h3 {
  font-size: 0.95rem;
  font-weight: 700;
  text-decoration: underline;
  margin-bottom: 16px;
  color: var(--text);
}

.pd-type-list {
  list-style: none;
  padding: 0;
  margin: 0;
}

.pd-type-list li {
  padding: 5px 0;
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--text);
}

.pd-type-list li .pd-type-size {
  font-weight: 400;
  color: var(--text-secondary);
  display: block;
  margin-top: 2px;
  font-size: 0.8rem;
}

.pd-parts-list {
  list-style: none;
  padding: 0;
  margin: 0;
}

.pd-parts-list li {
  padding: 5px 0;
  font-size: 0.85rem;
  color: var(--text);
}

.pd-parts-list li strong {
  display: inline-block;
  min-width: 100px;
}

.pd-cta {
  margin-top: 32px;
}

.pd-cta .btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
}

/* Tabs: Features / Options */
.pd-tabs {
  margin-top: 60px;
  border-top: 1px solid var(--border);
}

.pd-tab-nav {
  display: flex;
  gap: 0;
  border-bottom: 2px solid var(--border);
}

.pd-tab-btn {
  padding: 14px 28px;
  font-size: 0.85rem;
  font-weight: 600;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  color: var(--text-light);
  background: none;
  border: none;
  border-bottom: 2px solid transparent;
  margin-bottom: -2px;
  cursor: pointer;
  transition: color 0.2s, border-color 0.2s;
}

.pd-tab-btn:hover {
  color: var(--text);
}

.pd-tab-btn.active {
  color: var(--navy);
  border-bottom-color: var(--navy);
}

.pd-tab-content {
  display: none;
  padding: 28px 0;
}

.pd-tab-content.active {
  display: block;
}

.pd-tab-content ul {
  list-style: disc;
  padding-left: 20px;
}

.pd-tab-content li {
  font-size: 0.88rem;
  line-height: 2;
  color: var(--text-secondary);
}

.pd-tab-content li strong {
  color: var(--text);
}

/* Dimension Table */
.pd-dim-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.8rem;
  margin-top: 12px;
}

.pd-dim-table th,
.pd-dim-table td {
  padding: 8px 12px;
  text-align: center;
  border: 1px solid var(--border);
}

.pd-dim-table th {
  background: var(--navy);
  color: var(--white);
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.04em;
}

.pd-dim-table td {
  color: var(--text-secondary);
}

.pd-dim-table tr:nth-child(even) td {
  background: var(--off-white);
}

/* Language Section Divider */
.pd-lang-divider {
  margin: 48px 0;
  text-align: center;
  position: relative;
}

.pd-lang-divider::before {
  content: '';
  position: absolute;
  top: 50%;
  left: 0;
  right: 0;
  height: 1px;
  background: var(--border);
}

.pd-lang-divider span {
  position: relative;
  background: var(--white);
  padding: 0 20px;
  font-size: 0.8rem;
  font-weight: 600;
  color: var(--text-light);
  letter-spacing: 0.1em;
  text-transform: uppercase;
}

/* ZH Section */
.pd-zh-section {
  font-family: var(--font-zh);
}

.pd-zh-section .pd-tab-content li {
  font-family: var(--font-zh);
}

/* Product Detail Responsive */
@media (max-width: 768px) {
  .pd-layout {
    grid-template-columns: 1fr;
    gap: 32px;
  }

  .pd-gallery {
    position: static;
  }

  .pd-title { font-size: 1.3rem; }

  .pd-spec-row {
    flex-direction: column;
    gap: 2px;
  }

  .pd-spec-label { width: auto; }

  .pd-tab-btn {
    padding: 12px 16px;
    font-size: 0.78rem;
  }

  .pd-dim-table { font-size: 0.72rem; }
  .pd-dim-table th, .pd-dim-table td { padding: 6px 8px; }
}

/* =============================================
   PRODUCT SIDEBAR + LAYOUT
   ============================================= */
.products-with-sidebar {
  display: grid;
  grid-template-columns: 240px 1fr;
  gap: 40px;
  padding: 40px 0 80px;
}

.product-sidebar {
  position: sticky;
  top: calc(var(--header-height) + 20px);
  align-self: start;
  border: 1px solid var(--border);
}

.product-sidebar-group-title {
  background: var(--navy);
  color: var(--white);
  font-size: 0.76rem;
  font-weight: 600;
  text-transform: none;
  letter-spacing: 0.05em;
  padding: 10px 16px;
  white-space: nowrap;
  margin: 0;
}

.product-sidebar-list {
  list-style: none;
}

.product-sidebar-list li {
  border-bottom: 1px solid var(--border);
}

.product-sidebar-list li:last-child {
  border-bottom: none;
}

.product-sidebar-list a {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 10px 16px;
  font-size: 0.78rem;
  font-weight: 400;
  color: var(--text);
  transition: all 0.2s;
  border-left: 3px solid var(--sidebar-accent, transparent);
}

.product-sidebar-list a::after {
  content: none;
}

.product-sidebar-list a:hover {
  background: var(--off-white);
  color: var(--navy);
}

.product-sidebar-list a.active {
  background: var(--navy);
  color: var(--white);
  font-weight: 600;
}

.sidebar-group-zh {
  display: block;
  font-family: var(--font-zh);
  font-size: 0.76rem;
  font-weight: 400;
  letter-spacing: 0.05em;
  opacity: 0.85;
  margin-top: 2px;
}

.product-sidebar-list .sidebar-zh {
  display: block;
  width: 100%;
  font-family: var(--font-zh);
  font-size: 0.68rem;
  color: var(--text-light);
  margin-top: 2px;
  font-weight: 400;
}

.product-sidebar-list a.active .sidebar-zh {
  color: rgba(255,255,255,0.55);
}

.product-sidebar-list a {
  flex-wrap: wrap;
}

/* Product grid within sidebar layout */
.products-main .catalog-grid {
  grid-template-columns: repeat(3, 1fr);
}

@media (max-width: 1024px) {
  .products-with-sidebar {
    grid-template-columns: 200px 1fr;
    gap: 24px;
  }
  .products-main .catalog-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 768px) {
  .products-with-sidebar {
    grid-template-columns: 1fr;
    gap: 0;
  }
  .product-sidebar {
    position: static;
    margin-bottom: 24px;
  }
  .product-sidebar {
    position: static;
    margin-bottom: 24px;
  }
  .product-sidebar-list a {
    padding: 8px 14px;
    font-size: 0.75rem;
  }
  .products-main .catalog-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}