/* ============================================================
   Chuantai Machinery — Redesigned B2B Industrial Website CSS
   Style: Dark Navy (#1a1a2e) + Red Accent (#e63946) + Oswald/Noto Sans SC
   Reference: screwpress-website template
   ============================================================ */

/* ---- RESET & BASE ---- */
*, *::before, *::after { margin: 0; padding: 0; box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  font-family: 'Noto Sans SC', 'Segoe UI', -apple-system, BlinkMacSystemFont, sans-serif;
  color: #333;
  background: #fff;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}
img { max-width: 100%; height: auto; display: block; }
a { text-decoration: none; color: inherit; transition: color .3s; }
ul { list-style: none; }
details > summary { list-style: none; cursor: pointer; }
details > summary::-webkit-details-marker { display: none; }

/* ---- LAYOUT ---- */
.container { max-width: 1200px; margin: 0 auto; padding: 0 20px; }
.text-center { text-align: center; }
.section { padding: 80px 0; }

/* ---- SECTION HEADER ---- */
.section-header { text-align: center; margin-bottom: 50px; }
.section-title {
  font-size: 36px;
  font-weight: 700;
  color: #1a1a2e;
  margin-bottom: 12px;
  font-family: 'Oswald', 'Noto Sans SC', sans-serif;
  letter-spacing: .5px;
}
.section-subtitle { font-size: 16px; color: #888; }
.section-cta { text-align: center; margin-top: 52px; }

/* ---- BUTTONS ---- */
.btn {
  display: inline-block;
  padding: 12px 28px;
  border-radius: 4px;
  font-size: 15px;
  font-weight: 500;
  cursor: pointer;
  border: 2px solid transparent;
  transition: all .3s;
}
.btn-primary {
  background: #e63946;
  color: #fff;
  border-color: #e63946;
}
.btn-primary:hover { background: #c62c3a; border-color: #c62c3a; color: #fff; transform: translateY(-2px); }
.btn-outline {
  background: transparent;
  color: #fff;
  border-color: rgba(255,255,255,.6);
}
.btn-outline:hover { background: rgba(255,255,255,.12); color: #fff; border-color: #fff; }
.btn-whatsapp {
  background: #25d366;
  color: #fff;
  border-color: #25d366;
}
.btn-whatsapp:hover { background: #20b858; border-color: #20b858; color: #fff; }
.btn-large { padding: 15px 36px; font-size: 16px; }
.btn-full { width: 100%; border-radius: 10px; text-align: center; }

/* ---- HEADER ---- */
.site-header {
  background: #1a1a2e;
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 1000;
  box-shadow: 0 2px 10px rgba(0,0,0,.15);
  transition: box-shadow .3s;
}
.site-header.scrolled { box-shadow: 0 4px 20px rgba(0,0,0,.3); }
.navbar {
  display: flex;
  align-items: center;
  height: 70px;
  gap: 24px;
  padding: 0 16px;
}
.logo {
  display: flex;
  align-items: center;
  gap: 10px;
  text-decoration: none;
  flex-shrink: 0;
}
.logo img { height: 38px; width: auto; display: block; border-radius: 6px; }
.logo-text {
  font-size: 1.25rem;
  font-weight: 700;
  color: #fff;
  font-family: 'Oswald', sans-serif;
  letter-spacing: 1px;
  line-height: 1.2;
  white-space: nowrap;
}
.logo-text span { color: #f59e0b; }

.nav-links {
  display: flex;
  align-items: center;
  gap: 4px;
  flex: 1;
  margin-left: 16px;
}
.nav-links > li { position: relative; }
.nav-links a {
  display: block;
  padding: 8px 14px;
  font-size: .95rem;
  font-weight: 500;
  color: rgba(255,255,255,.7);
  border-bottom: 2px solid transparent;
  transition: all .3s;
  white-space: nowrap;
}
.nav-links a:hover, .nav-links a.active {
  color: #fff;
  border-bottom-color: #e63946;
}
.arrow-down { font-size: .6rem; opacity: .6; margin-left: 3px; }

/* Dropdown */
.has-dropdown:hover .dropdown { opacity: 1; visibility: visible; transform: translateX(-50%) translateY(0); }
.dropdown {
  position: absolute;
  top: calc(100% + 8px);
  left: 50%;
  transform: translateX(-50%) translateY(-6px);
  min-width: 260px;
  background: #1a1a2e;
  border: 1px solid rgba(255,255,255,.12);
  border-radius: 10px;
  padding: 8px 0;
  box-shadow: 0 12px 40px rgba(0,0,0,.4);
  opacity: 0;
  visibility: hidden;
  transition: opacity .25s, visibility .25s, transform .25s;
  z-index: 2000;
}
.dropdown li a {
  display: block;
  padding: 10px 20px;
  font-size: .9rem;
  font-weight: 500;
  color: rgba(255,255,255,.75);
  transition: all .2s;
}
.dropdown li a:hover { background: rgba(230,57,70,.15); color: #e63946; border-bottom: none; border-radius: 0; }
.dropdown li:first-child a { border-radius: 10px 10px 0 0; }
.dropdown li:last-child a { border-radius: 0 0 10px 10px; }

.nav-cta { display: flex; align-items: center; gap: 10px; flex-shrink: 0; }
.mobile-toggle { display: none; background: none; border: none; color: #fff; font-size: 1.5rem; cursor: pointer; margin-left: auto; }

/* Language Switcher */
.lang-switch { position: relative; display: none; }
.lang-btn {
  background: transparent;
  border: 1px solid rgba(255,255,255,.3);
  color: #fff;
  padding: 7px 14px;
  border-radius: 6px;
  font-size: .88rem;
  font-weight: 500;
  cursor: pointer;
  display: flex;
  align-items: center;
  gap: 6px;
  transition: all .2s;
}
.lang-btn:hover { border-color: rgba(255,255,255,.6); background: rgba(255,255,255,.08); }
.lang-dropdown {
  position: absolute;
  top: calc(100% + 6px);
  right: 0;
  min-width: 160px;
  background: #1a1a2e;
  border: 1px solid rgba(255,255,255,.1);
  border-radius: 10px;
  padding: 8px;
  opacity: 0;
  visibility: hidden;
  transform: translateY(-4px);
  transition: all .2s;
  box-shadow: 0 12px 40px rgba(0,0,0,.35);
  z-index: 1001;
}
.lang-switch:hover .lang-dropdown { opacity: 1; visibility: visible; transform: translateY(0); }
.lang-dropdown li a {
  display: block;
  padding: 8px 14px;
  font-size: .88rem;
  color: rgba(255,255,255,.82);
  border-radius: 8px;
  transition: all .2s;
}
.lang-dropdown li a:hover { background: rgba(255,255,255,.08); color: #fff; }

/* ---- HERO — Full-Screen Slider ---- */
.hero {
  position: relative;
  min-height: 700px;
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  text-align: center;
  color: #fff;
  overflow: hidden;
  padding-top: 70px;
}
/* Slider */
.hero-slider { position: absolute; inset: 0; overflow: hidden; }
.hero-slide {
  position: absolute;
  inset: 0;
  background-size: cover;
  background-position: center;
  background-repeat: no-repeat;
  opacity: 0;
  transition: opacity 1.5s ease-in-out;
}
.hero-slide.active { opacity: 1; }
.hero-slide::after {
  content: '';
  position: absolute;
  inset: 0;
  background: rgba(5,10,25,.40);
}
.hero-slide::before {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, rgba(3,5,15,.60) 0%, rgba(3,10,35,.55) 100%);
  z-index: 1;
}
/* Pattern overlay */
.hero-bg-pattern {
  position: absolute;
  inset: 0;
  background: url("data:image/svg+xml,%3Csvg width='60' height='60' viewBox='0 0 60 60' xmlns='http://www.w3.org/2000/svg'%3E%3Cg fill='none' fill-rule='evenodd'%3E%3Cg fill='%23ffffff' fill-opacity='0.03'%3E%3Cpath d='M36 34v-4h-2v4h-4v2h4v4h2v-4h4v-2h-4zm0-30V0h-2v4h-4v2h4v4h2V6h4V4h-4zM6 34v-4H4v4H0v2h4v4h2v-4h4v-2H6zM6 4V0H4v4H0v2h4v4h2V6h4V4H6z'/%3E%3C/g%3E%3C/g%3E%3C/svg%3E");
  z-index: 2;
  pointer-events: none;
}
/* Nav Buttons */
.hero-nav {
  position: absolute;
  top: 50%;
  transform: translateY(-50%);
  z-index: 10;
  display: flex;
  justify-content: space-between;
  width: 100%;
  padding: 0 20px;
  pointer-events: none;
}
.hero-nav-prev,
.hero-nav-next {
  width: 50px;
  height: 50px;
  background: rgba(255,255,255,.15);
  border: 2px solid rgba(255,255,255,.3);
  border-radius: 50%;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all .3s;
  pointer-events: auto;
  backdrop-filter: blur(4px);
}
.hero-nav-prev:hover,
.hero-nav-next:hover {
  background: rgba(255,255,255,.25);
  border-color: rgba(255,255,255,.5);
}
.hero-nav-prev::before,
.hero-nav-next::before {
  content: '';
  width: 12px;
  height: 12px;
  border-top: 3px solid #fff;
  border-right: 3px solid #fff;
}
.hero-nav-prev::before { transform: rotate(-135deg); margin-left: 4px; }
.hero-nav-next::before { transform: rotate(45deg); margin-right: 4px; }
@media(max-width: 768px) {
  .hero-nav-prev, .hero-nav-next { width: 40px; height: 40px; }
  .hero-nav-prev::before, .hero-nav-next::before { border-width: 2px; }
}
.hero-content {
  position: relative;
  z-index: 2;
  padding: 40px 20px 0;
  max-width: 800px;
}
.hero-title {
  font-size: clamp(2.2rem, 5vw, 3.4rem);
  font-weight: 700;
  margin-bottom: 16px;
  line-height: 1.15;
  letter-spacing: -.02em;
}
.hero-title .accent { color: #e63946; }
.hero-sub {
  font-size: 1.1rem;
  color: #e63946;
  font-weight: 600;
  margin-bottom: 20px;
  font-family: 'Oswald', sans-serif;
  letter-spacing: 1.5px;
  text-transform: uppercase;
}
.hero-desc { font-size: 1rem; color: #cbd5e1; margin-bottom: 36px; line-height: 1.85; max-width: 660px; margin-left: auto; margin-right: auto; }
.hero-actions { display: flex; gap: 14px; justify-content: center; flex-wrap: wrap; margin-bottom: 0; }
.hero-stats {
  position: relative;
  z-index: 2;
  display: flex;
  justify-content: center;
  flex-wrap: wrap;
  gap: 0;
  padding: 28px 20px;
  margin-top: 30px;
  border-top: 1px solid rgba(255,255,255,.1);
  width: 100%;
  max-width: 900px;
  background: rgba(15,23,42,.55);
  border-radius: 0 0 16px 16px;
  backdrop-filter: blur(12px);
}
.stat-item { text-align: center; padding: 12px 40px; }
.stat-divider { width: 1px; height: 50px; background: rgba(255,255,255,.15); align-self: center; }
.stat-number { display: block; font-size: 2.4rem; font-weight: 700; color: #e63946; font-family: 'Oswald', sans-serif; line-height: 1; }
.stat-label { display: block; font-size: .82rem; color: rgba(255,255,255,.65); margin-top: 6px; letter-spacing: .3px; }
@media(max-width: 640px) {
  .stat-item { padding: 14px 24px; }
  .stat-divider { display: none; }
  .hero-stats { gap: 0; }
  .hero-stats { flex-direction: column; align-items: center; }
}

/* ---- WHY US ---- */
.why-us { background: #f8f9fa; }
.why-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 30px;
}
.why-card {
  background: #fff;
  padding: 36px 28px;
  border-radius: 12px;
  text-align: center;
  box-shadow: 0 4px 20px rgba(0,0,0,.06);
  transition: transform .3s, box-shadow .3s;
  border-top: 3px solid transparent;
}
.why-card:hover {
  transform: translateY(-5px);
  box-shadow: 0 8px 30px rgba(0,0,0,.1);
  border-top-color: #e63946;
}
.why-icon { font-size: 48px; margin-bottom: 16px; }
.why-card h3 { font-size: 1.1rem; margin-bottom: 12px; color: #1a1a2e; font-weight: 700; }
.why-card p { font-size: .9rem; color: #666; line-height: 1.75; }

/* ---- HOW IT WORKS ---- */
.how-it-works { background: #1a1a2e; color: #fff; }
.how-it-works .section-title { color: #fff; }
.how-steps {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 30px;
}
.how-step {
  background: rgba(255,255,255,.06);
  border: 1px solid rgba(255,255,255,.1);
  border-radius: 12px;
  padding: 32px 24px;
  text-align: center;
  transition: all .3s;
}
.how-step:hover {
  border-color: rgba(230,57,70,.4);
  background: rgba(230,57,70,.08);
  transform: translateY(-3px);
}
.step-num {
  font-size: 3rem;
  font-weight: 700;
  color: #e63946;
  font-family: 'Oswald', sans-serif;
  margin-bottom: 16px;
  line-height: 1;
}
.step-icon { font-size: 2.4rem; margin-bottom: 16px; }
.how-step h3 { font-size: 1rem; font-weight: 700; color: #fff; margin-bottom: 12px; }
.how-step p { font-size: .875rem; color: #94a3b8; line-height: 1.75; }

/* ---- PRODUCTS GRID ---- */
.products-preview { background: #fff; }
.product-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 28px;
}
.product-card {
  background: #fff;
  border-radius: 12px;
  border: 1px solid #eee;
  overflow: hidden;
  transition: box-shadow .3s, transform .3s;
}
.product-card:hover { box-shadow: 0 8px 30px rgba(0,0,0,.1); transform: translateY(-4px); }
.product-image {
  position: relative;
  height: 200px;
  background: linear-gradient(135deg, #1a1a2e, #0f3460);
  overflow: hidden;
  display: flex;
  align-items: center;
  justify-content: center;
}
.product-image img { width: 100%; height: 100%; object-fit: cover; }
.product-badge {
  position: absolute;
  top: 14px;
  right: 14px;
  padding: 4px 12px;
  border-radius: 20px;
  font-size: .75rem;
  font-weight: 700;
  letter-spacing: .5px;
}
.badge-bestseller { background: #e63946; color: #fff; }
.badge-new { background: #1a1a2e; color: #fff; border: 1px solid rgba(255,255,255,.3); }
.badge-hot { background: #ff6b35; color: #fff; }
.product-content { padding: 24px; }
.product-title { font-size: 1.05rem; font-weight: 700; color: #1a1a2e; margin-bottom: 8px; }
.product-desc { font-size: .875rem; color: #666; margin-bottom: 16px; line-height: 1.7; }
.product-specs { display: flex; flex-wrap: wrap; gap: 6px; margin-bottom: 18px; }
.spec-tag {
  display: inline-block;
  padding: 4px 10px;
  background: #f8f9fa;
  border-radius: 4px;
  font-size: .75rem;
  font-weight: 600;
  color: #475569;
}
.product-actions {
  display: flex;
  align-items: center;
  gap: 12px;
}
.product-price { font-size: 1.05rem; font-weight: 700; color: #e63946; }

/* ---- APPLICATIONS GRID ---- */
.applications-section { background: #1a1a2e; color: #fff; }
.applications-section .section-title { color: #fff; }
.applications-section .section-subtitle { color: #94a3b8; }
.app-grid-home {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
  gap: 20px;
}
.app-item-home {
  text-align: center;
  padding: 28px 16px;
  border: 1px solid rgba(255,255,255,.1);
  border-radius: 10px;
  transition: border-color .3s, background .3s;
  cursor: default;
}
.app-item-home:hover { border-color: #e63946; background: rgba(230,57,70,.08); }
.app-icon-home { font-size: 2.2rem; margin-bottom: 12px; }
.app-item-home h4 { font-size: .95rem; margin-bottom: 8px; color: #fff; }
.app-item-home p { font-size: .8rem; color: #94a3b8; }

/* ---- BLOG PREVIEW ---- */
.blog-preview { background: #f8fafc; }
.blog-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 24px;
}
.blog-card {
  background: #fff;
  border-radius: 12px;
  overflow: hidden;
  box-shadow: 0 4px 16px rgba(0,0,0,.06);
  transition: transform .3s, box-shadow .3s;
}
.blog-card:hover { transform: translateY(-4px); box-shadow: 0 8px 24px rgba(0,0,0,.1); }
.blog-card-img {
  height: 160px;
  background: linear-gradient(135deg, #1a1a2e 0%, #0f3460 100%);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 48px;
  color: #e63946;
  overflow: hidden;
}
.blog-card-img img { width: 100%; height: 100%; object-fit: cover; }
.blog-card-content { padding: 20px; }
.blog-card-meta { font-size: .8rem; color: #888; margin-bottom: 10px; }
.blog-card-title { font-size: .97rem; font-weight: 600; color: #1a1a2e; margin-bottom: 10px; line-height: 1.4; }
.blog-card-title a { color: inherit; }
.blog-card-title a:hover { color: #e63946; }
.blog-card-excerpt {
  font-size: .85rem;
  color: #666;
  line-height: 1.65;
  display: -webkit-box;
  -webkit-line-clamp: 3;
  -webkit-box-orient: vertical;
  overflow: hidden;
}
.blog-card-link { display: inline-block; margin-top: 12px; color: #e63946; font-size: .875rem; font-weight: 500; }

/* ---- FACTORY / CERTS ---- */
.factory-section { background: #f8fafc; }
.factory-grid {
  display: grid;
  grid-template-columns: 1fr 2fr;
  gap: 52px;
  margin-bottom: 52px;
  align-items: start;
}
.factory-stats { display: flex; flex-direction: column; gap: 20px; }
.f-stat { background: #fff; border-radius: 12px; padding: 22px 26px; border: 1px solid #eee; }
.f-num { display: block; font-size: 2rem; font-weight: 800; color: #e63946; font-family: 'Oswald', sans-serif; }
.f-label { display: block; font-size: .83rem; color: #888; margin-top: 5px; }
.cert-row { display: grid; grid-template-columns: repeat(2, 1fr); gap: 16px; }
.cert-card {
  background: #fff;
  border-radius: 12px;
  padding: 22px;
  border: 1px solid #eee;
  display: flex;
  gap: 14px;
  align-items: flex-start;
  transition: all .25s;
}
.cert-card:hover { border-color: #e63946; box-shadow: 0 4px 16px rgba(230,57,70,.1); }
.cert-badge {
  width: 50px;
  height: 50px;
  background: linear-gradient(135deg, #e63946, #c62c3a);
  color: #fff;
  font-weight: 700;
  font-size: .7rem;
  border-radius: 10px;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  letter-spacing: .5px;
}
.cert-card strong { display: block; font-size: .95rem; color: #1a1a2e; margin-bottom: 5px; }
.cert-card p { font-size: .8rem; color: #888; line-height: 1.6; }
.factory-hero-image {
  width: 100%;
  max-width: 840px;
  margin: 0 auto 48px;
  border-radius: 16px;
  overflow: hidden;
  box-shadow: 0 8px 40px rgba(0,0,0,.14);
}
.factory-hero-image img { width: 100%; height: auto; object-fit: contain; display: block; border-radius: 16px; }

/* ---- GLOBAL REACH ---- */
.global-section { background: #fff; }
.global-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 28px;
}
.global-card {
  background: #f8fafc;
  padding: 28px 22px;
  border-radius: 12px;
  border-top: 3px solid #e63946;
  transition: transform .3s, box-shadow .3s;
}
.global-card:hover { transform: translateY(-4px); box-shadow: 0 8px 24px rgba(0,0,0,.1); }
.global-icon { font-size: 2rem; margin-bottom: 14px; }
.global-card h3 { font-size: 1rem; font-weight: 700; color: #1a1a2e; margin-bottom: 10px; }
.global-card p { font-size: .85rem; color: #666; line-height: 1.7; }

/* ---- FAQ PREVIEW ---- */
.faq-preview { background: #f8fafc; }
.faq-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(380px, 1fr)); gap: 12px; }
.faq-item {
  background: #fff;
  border-radius: 10px;
  border: 2px solid #e2e8f0;
  overflow: hidden;
  transition: border-color .25s;
}
.faq-item[open] { border-color: #e63946; }
.faq-item summary {
  padding: 18px 24px;
  font-weight: 600;
  font-size: .95rem;
  color: #1a1a2e;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 12px;
}
.faq-item summary::after { content: '+'; font-size: 1.4rem; color: #e63946; flex-shrink: 0; font-weight: 300; }
.faq-item[open] summary::after { content: '−'; }
.faq-item p { padding: 0 24px 18px; color: #64748b; font-size: .9rem; line-height: 1.8; }

/* ---- CONTACT CTA ---- */
.contact-cta {
  background: linear-gradient(135deg, #1a1a2e 0%, #0f3460 100%);
  padding: 80px 20px;
  text-align: center;
  color: #fff;
  position: relative;
  overflow: hidden;
}
.contact-cta::before {
  content: '';
  position: absolute;
  inset: 0;
  background: url("data:image/svg+xml,%3Csvg width='60' height='60' viewBox='0 0 60 60' xmlns='http://www.w3.org/2000/svg'%3E%3Cg fill='none' fill-rule='evenodd'%3E%3Cg fill='%23ffffff' fill-opacity='0.03'%3E%3Cpath d='M36 34v-4h-2v4h-4v2h4v4h2v-4h4v-2h-4zm0-30V0h-2v4h-4v2h4v4h2V6h4V4h-4zM6 34v-4H4v4H0v2h4v4h2v-4h4v-2H6zM6 4V0H4v4H0v2h4v4h2V6h4V4H6z'/%3E%3C/g%3E%3C/g%3E%3C/svg%3E");
}
.contact-cta h2 {
  font-size: 2.2rem;
  font-weight: 700;
  margin-bottom: 16px;
  font-family: 'Oswald', sans-serif;
  letter-spacing: .5px;
  position: relative;
}
.contact-cta p { font-size: 1rem; color: #94a3b8; margin-bottom: 32px; position: relative; }

/* ---- FOOTER ---- */
.site-footer { background: #0f0f1a; padding: 60px 0 0; color: rgba(255,255,255,.45); }
.footer-inner {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1.5fr;
  gap: 48px;
  padding-bottom: 48px;
}
.footer-col .logo { margin-bottom: 16px; }
.footer-col .logo-text { color: #fff; }
.footer-col p { font-size: .88rem; line-height: 1.75; }
.footer-col h4 {
  font-size: .82rem;
  font-weight: 700;
  color: rgba(255,255,255,.85);
  margin-bottom: 16px;
  text-transform: uppercase;
  letter-spacing: .07em;
}
.footer-col ul { display: flex; flex-direction: column; gap: 10px; }
.footer-col ul a { font-size: .88rem; color: rgba(255,255,255,.45); transition: color .2s; }
.footer-col ul a:hover { color: #fff; }
.footer-contact li { font-size: .88rem; line-height: 1.65; }
.footer-bottom {
  border-top: 1px solid rgba(255,255,255,.06);
  padding: 20px 24px;
  text-align: center;
}
.footer-bottom p { font-size: .8rem; color: rgba(255,255,255,.25); }

/* ---- WhatsApp Float ---- */
.wa-float {
  position: fixed;
  bottom: 28px;
  left: 28px;
  z-index: 9999;
  width: 58px;
  height: 58px;
  background: #25d366;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 6px 24px rgba(37,211,102,.4);
  transition: transform .25s;
  animation: wa-pulse 2.8s infinite;
}
.wa-float:hover { transform: scale(1.1); }
@keyframes wa-pulse {
  0%, 100% { box-shadow: 0 6px 24px rgba(37,211,102,.4); }
  50% { box-shadow: 0 6px 36px rgba(37,211,102,.7); }
}

/* ---- RESPONSIVE ---- */
@media (max-width: 1024px) {
  .factory-grid { grid-template-columns: 1fr; }
  .footer-inner { grid-template-columns: 1fr 1fr; }
}
@media (max-width: 768px) {
  .section { padding: 60px 0; }
  .section-title { font-size: 1.8rem; }
  .mobile-toggle { display: flex; }
  .nav-links {
    display: none;
    flex-direction: column;
    gap: 0;
    position: absolute;
    top: 70px;
    left: 0;
    right: 0;
    background: #16213e;
    padding: 16px;
    border-bottom: 1px solid rgba(255,255,255,.1);
  }
  .nav-links.open { display: flex; }
  .nav-links a { padding: 10px 16px; }
  .dropdown { position: static; opacity: 1; visibility: visible; transform: none; background: rgba(255,255,255,.04); border: none; box-shadow: none; padding-left: 16px; }
  .nav-cta .btn-primary { display: none; }
  .nav-cta .btn-whatsapp { display: none; }
  .lang-switch { display: none; }
  .hero-stats { flex-direction: column; gap: 0; border-radius: 0; }
  .stat-divider { display: none; }
  .hero-stats .stat-item { width: 100%; border-bottom: 1px solid rgba(255,255,255,.1); padding: 14px 0; }
  .why-grid { grid-template-columns: 1fr 1fr; }
  .footer-inner { grid-template-columns: 1fr; gap: 32px; }
  .cert-row { grid-template-columns: 1fr; }
  .faq-grid { grid-template-columns: 1fr; }
}
@media (max-width: 480px) {
  .hero-title { font-size: 1.9rem; }
  .hero-desc { font-size: .9rem; }
  .hero-actions { flex-direction: column; }
  .hero-actions .btn { width: 100%; justify-content: center; }
  .why-grid { grid-template-columns: 1fr; }
  .product-grid { grid-template-columns: 1fr; }
  .app-grid-home { grid-template-columns: repeat(2, 1fr); }
}

/* ---- INTERNAL PAGE HERO ---- */
.page-hero {
  background: url('../images/bannei.jpg') center/cover no-repeat;
  color: #fff;
  text-align: center;
  padding: 110px 20px 60px;
  position: relative;
  overflow: hidden;
}
.page-hero::before {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, rgba(26,26,46,0.65) 0%, rgba(15,52,96,0.65) 100%);
}
.page-hero h1 {
  font-size: 2.2rem;
  font-weight: 700;
  margin-bottom: 14px;
  font-family: 'Oswald', sans-serif;
  letter-spacing: .5px;
  position: relative;
}
.page-hero p { font-size: 1rem; color: #94a3b8; max-width: 620px; margin: 0 auto; position: relative; line-height: 1.75; }
.breadcrumb {
  display: flex;
  gap: 8px;
  align-items: center;
  justify-content: center;
  margin-bottom: 22px;
  font-size: .82rem;
  color: rgba(255,255,255,.4);
  position: relative;
}
.breadcrumb a { color: rgba(255,255,255,.55); }
.breadcrumb a:hover { color: #fff; }
.breadcrumb span { color: rgba(255,255,255,.25); }

/* Product detail */
.product-detail-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 60px; align-items: start; }
.product-specs-table { width: 100%; border-collapse: collapse; }
.product-specs-table th, .product-specs-table td { padding: 12px 16px; border: 1px solid #eee; font-size: .9rem; }
.product-specs-table th { background: #1a1a2e; color: #fff; font-weight: 600; text-align: left; }
.product-specs-table tr:nth-child(even) td { background: #f8fafc; }
.product-specs-table td:first-child { white-space: nowrap; font-weight: 600; color: #475569; }

/* Application card grid */
.app-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 20px;
}
.app-icon { display: flex; align-items: center; justify-content: center; margin-bottom: 12px; }
.app-card {
  background: #fff;
  border-radius: 12px;
  border: 1.5px solid #eee;
  overflow: hidden;
  text-align: center;
  transition: transform .2s, box-shadow .2s;
  cursor: pointer;
  text-decoration: none;
  color: inherit;
}
.app-card:hover { transform: translateY(-4px); box-shadow: 0 12px 32px rgba(0,0,0,.12); }
.app-card-image {
  width: 100%;
  aspect-ratio: 4/3;
  background: #f5f5f5;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 10px 10px 0 0;
  overflow: hidden;
}
.app-card-image img { width: 100%; height: 100%; object-fit: cover; transition: transform .3s; }
.app-card:hover .app-card-image img { transform: scale(1.05); }
.app-card-title { padding: 14px 12px; font-size: 1rem; font-weight: 600; color: #1a1a2e; }
@media(max-width: 768px) {
  .app-grid { grid-template-columns: repeat(3, 1fr); }
  .app-card-title { padding: 8px 4px; font-size: .85rem; }
  .app-card { border-radius: 6px; }
}

/* ---- PRODUCTS PAGE ---- */
.products-section { background: #f8fafc; }
.products-section .section-title { color: #1a1a2e; }
.products-section .section-subtitle { color: #888; }
.products-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 28px;
}
.product-card2 {
  background: #fff;
  border-radius: 16px;
  overflow: hidden;
  box-shadow: 0 4px 20px rgba(0,0,0,.06);
  transition: box-shadow .3s, transform .3s;
}
.product-card2:hover { box-shadow: 0 8px 36px rgba(0,0,0,.12); transform: translateY(-4px); }
.product-card2-image {
  height: 200px;
  background: linear-gradient(135deg, #1a1a2e, #0f3460);
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
}
.product-card2-image img { width: 100%; height: 100%; object-fit: cover; }
.product-card2-body { padding: 28px; }
.product-card2-body h3 { font-size: 1.1rem; font-weight: 700; color: #1a1a2e; margin-bottom: 6px; }
.product-series { font-size: .82rem; color: #e63946; font-weight: 600; margin-bottom: 12px; }
.product-card2-body p { color: #666; font-size: .9rem; margin-bottom: 18px; line-height: 1.7; }
.product-materials { display: flex; flex-wrap: wrap; gap: 6px; margin-bottom: 20px; }
.mat-tag { display: inline-block; padding: 3px 10px; background: #fff0f0; border: 1px solid rgba(230,57,70,.15); border-radius: 40px; font-size: .75rem; color: #e63946; font-weight: 500; }
.product-card2 .btn { padding: 10px 22px; font-size: .88rem; }
.product-card2 .btn-primary { background: #e63946; border-color: #e63946; color: #fff; }
.product-card2 .btn-primary:hover { background: #c62c3a; border-color: #c62c3a; }
/* ── Form inputs (global) ── */
input, textarea, select { width: 100%; padding: 14px 16px; font-size: .95rem; border: 2px solid #d1d5db; border-radius: 8px; background: #fff; color: #1a2744; transition: border-color .2s, box-shadow .2s; }
input:focus, textarea:focus, select:focus { outline: none; border-color: var(--blue); box-shadow: 0 0 0 3px rgba(13, 74, 142, 0.15); }
input::placeholder, textarea::placeholder { color: #9ca3af; }
textarea { resize: vertical; min-height: 120px; }
.form-row { margin-bottom: 14px; }