/* ═══════════════════════════════════════════
   ZOUYU - Professional Ceramic Fiber Manufacturer
   Complete Responsive Stylesheet
   ═══════════════════════════════════════════ */

/* ── CSS Variables ── */
:root {
  --primary: #1B3A5C;
  --primary-light: #2B5F8E;
  --primary-dark: #0F2440;
  --accent: #D4A843;
  --accent-light: #E8C96A;
  --accent-dark: #B8912E;
  --maroon: #8B2500;
  --white: #FFFFFF;
  --gray-50: #F8F9FA;
  --gray-100: #F1F3F5;
  --gray-200: #E9ECEF;
  --gray-300: #DEE2E6;
  --gray-400: #ADB5BD;
  --gray-500: #6C757D;
  --gray-600: #495057;
  --gray-700: #343A40;
  --gray-800: #212529;
  --success: #28A745;
  --shadow-sm: 0 1px 3px rgba(0,0,0,.08);
  --shadow-md: 0 4px 12px rgba(0,0,0,.1);
  --shadow-lg: 0 8px 30px rgba(0,0,0,.12);
  --shadow-xl: 0 16px 48px rgba(0,0,0,.15);
  --radius-sm: 6px;
  --radius-md: 10px;
  --radius-lg: 16px;
  --radius-xl: 24px;
  --transition: all .3s ease;
  --font: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  --container: 1200px;
  --nav-height: 72px;
}

/* ── Reset & Base ── */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; font-size: 16px; }
body {
  font-family: var(--font);
  color: var(--gray-700);
  line-height: 1.7;
  background: var(--white);
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}
img { max-width: 100%; height: auto; display: block; }
a { color: var(--primary); text-decoration: none; transition: var(--transition); }
a:hover { color: var(--accent); }
ul, ol { list-style: none; }
h1, h2, h3, h4, h5, h6 { color: var(--gray-800); line-height: 1.3; font-weight: 700; }
h1 { font-size: clamp(2rem, 4vw, 3rem); }
h2 { font-size: clamp(1.6rem, 3vw, 2.4rem); }
h3 { font-size: clamp(1.1rem, 2vw, 1.4rem); }
p { margin-bottom: 1rem; }

/* ── Container ── */
.container { max-width: var(--container); margin: 0 auto; padding: 0 24px; }
.text-center { text-align: center; }
.mx-auto { margin-left: auto; margin-right: auto; }

/* ── Section ── */
.section { padding: 80px 0; }
.section-sm { padding: 48px 0; }
.section-label {
  display: inline-block;
  font-size: .8rem;
  font-weight: 700;
  letter-spacing: 2px;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 12px;
}
.section-title { margin-bottom: 16px; }
.section-desc {
  font-size: 1.05rem;
  color: var(--gray-500);
  max-width: 640px;
  line-height: 1.8;
}
.section-desc.mx-auto { margin-left: auto; margin-right: auto; }
.bg-gradient { background: linear-gradient(135deg, var(--primary) 0%, var(--primary-dark) 100%); color: var(--white); }
.bg-gradient .section-title,
.bg-gradient .section-label { color: var(--white); }
.bg-gradient .section-label { color: var(--accent-light); }
.bg-gradient .section-desc { color: rgba(255,255,255,.8); }
.bg-dark { background: var(--primary-dark); color: var(--white); }
.bg-dark .section-title { color: var(--white); }
.bg-dark .section-desc { color: rgba(255,255,255,.8); }
.bg-gray { background: var(--gray-50); }

/* ── Buttons ── */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 14px 32px;
  font-size: .95rem;
  font-weight: 600;
  border-radius: var(--radius-sm);
  border: 2px solid transparent;
  cursor: pointer;
  transition: var(--transition);
  text-decoration: none;
  white-space: nowrap;
}
.btn-primary { background: var(--accent); color: var(--white); border-color: var(--accent); }
.btn-primary:hover { background: var(--accent-dark); border-color: var(--accent-dark); color: var(--white); transform: translateY(-2px); box-shadow: var(--shadow-md); }
.btn-outline { background: transparent; color: var(--white); border-color: rgba(255,255,255,.5); }
.btn-outline:hover { background: var(--white); color: var(--primary); border-color: var(--white); }
.btn-white { background: var(--white); color: var(--primary); border-color: var(--white); }
.btn-white:hover { background: transparent; color: var(--white); border-color: var(--white); }
.btn-dark { background: var(--primary); color: #fff; border-color: var(--primary); }
.btn-dark:hover { background: var(--primary-light); border-color: var(--primary-light); color: #fff; transform: translateY(-2px); }
.btn-ghost { background: transparent; color: var(--primary); border-color: var(--primary); }
.btn-ghost:hover { background: var(--primary); color: var(--white); }

/* ── Grid ── */
.grid-2 { display: grid; grid-template-columns: repeat(2, 1fr); gap: 40px; align-items: start; }
.grid-3 { display: grid; grid-template-columns: repeat(3, 1fr); gap: 32px; }
.grid-4 { display: grid; grid-template-columns: repeat(4, 1fr); gap: 28px; }
@media (max-width: 992px) {
  .grid-4 { grid-template-columns: repeat(2, 1fr); }
  .grid-3 { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 768px) {
  .grid-2, .grid-3, .grid-4 { grid-template-columns: 1fr; }
  .section { padding: 56px 0; }
}

/* ══════ NAVIGATION ══════ */
.navbar {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: var(--nav-height);
  background: rgba(255,255,255,.97);
  backdrop-filter: blur(12px);
  z-index: 1000;
  border-bottom: 1px solid var(--gray-200);
  transition: var(--transition);
}
.navbar.scrolled { box-shadow: var(--shadow-md); }
.navbar .container { display: flex; align-items: center; justify-content: space-between; height: 100%; }
.nav-logo { display: flex; align-items: center; gap: 12px; font-weight: 800; font-size: 1.4rem; color: var(--primary); }
.nav-logo img { height: 40px; width: auto; }
.nav-links { display: flex; align-items: center; gap: 4px; }
.nav-links a {
  padding: 8px 16px;
  font-size: .9rem;
  font-weight: 500;
  color: var(--gray-600);
  border-radius: var(--radius-sm);
  transition: var(--transition);
}
.nav-links a:hover, .nav-links a.active { color: var(--primary); background: var(--gray-50); }

/* Dropdown */
.nav-dropdown { position: relative; }
.nav-dropdown > a::after {
  content: '';
  display: inline-block;
  width: 0;
  height: 0;
  margin-left: 6px;
  border-left: 4px solid transparent;
  border-right: 4px solid transparent;
  border-top: 4px solid currentColor;
  vertical-align: middle;
}
.dropdown-menu {
  position: absolute;
  top: 100%;
  left: 0;
  min-width: 240px;
  background: var(--white);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-lg);
  padding: 8px 0;
  opacity: 0;
  visibility: hidden;
  transform: translateY(8px);
  transition: var(--transition);
  z-index: 100;
}
.nav-dropdown:hover .dropdown-menu { opacity: 1; visibility: visible; transform: translateY(0); }
.dropdown-menu a { display: block; padding: 10px 20px; font-size: .88rem; border-radius: 0; }
.dropdown-menu a:hover { background: var(--gray-50); color: var(--primary); }

.nav-cta { margin-left: 12px; }
.nav-cta .btn { padding: 10px 24px; font-size: .85rem; color: #fff !important; }
.nav-cta .btn:hover { color: #990033 !important; }

/* Mobile Menu Toggle */
.nav-toggle { display: none; background: none; border: none; cursor: pointer; padding: 8px; }
.nav-toggle span { display: block; width: 24px; height: 2px; background: var(--gray-700); margin: 5px 0; transition: var(--transition); }

@media (max-width: 992px) {
  .nav-toggle { display: block; }
  .nav-links {
    position: fixed;
    top: var(--nav-height);
    left: 0;
    right: 0;
    background: var(--white);
    flex-direction: column;
    padding: 24px;
    gap: 4px;
    box-shadow: var(--shadow-lg);
    transform: translateY(-120%);
    transition: var(--transition);
    max-height: calc(100vh - var(--nav-height));
    overflow-y: auto;
  }
  .nav-links.open { transform: translateY(0); }
  .nav-links a { width: 100%; padding: 12px 16px; }
  .dropdown-menu { position: static; box-shadow: none; opacity: 1; visibility: visible; transform: none; padding-left: 16px; display: none; }
  .nav-dropdown.open .dropdown-menu { display: block; }
  .nav-cta { margin-left: 0; margin-top: 12px; width: 100%; }
  .nav-cta .btn { width: 100%; justify-content: center; }
}

/* ══════ HERO ══════ */
.hero {
  position: relative;
  min-height: 92vh;
  margin-top: var(--nav-height);
  overflow: hidden;
}
.hero-slide {
  position: absolute;
  inset: 0;
  display: flex;
  align-items: center;
  opacity: 0;
  visibility: hidden;
  transition: opacity 1s ease, visibility 1s ease;
  z-index: 0;
}
.hero-slide.active {
  opacity: 1;
  visibility: visible;
  z-index: 1;
}
.hero-bg {
  position: absolute;
  inset: 0;
  z-index: 0;
}
.hero-bg img { width: 100%; height: 100%; object-fit: cover; }
.hero-bg::after {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, rgba(15,36,64,.7) 0%, rgba(27,58,92,.45) 100%);
}
.hero-slide .container { position: relative; z-index: 1; width: 100%; }
.hero-content { max-width: 720px; }
.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 8px 20px;
  background: rgba(255,255,255,.12);
  border: 1px solid rgba(255,255,255,.2);
  border-radius: 100px;
  font-size: .82rem;
  font-weight: 600;
  color: var(--accent-light);
  margin-bottom: 24px;
  backdrop-filter: blur(4px);
}
.hero h1 { color: var(--white); margin-bottom: 20px; }
.hero h1 span { color: var(--accent-light); }
.hero p { color: rgba(255,255,255,.85); font-size: 1.1rem; line-height: 1.8; margin-bottom: 32px; }
.hero-buttons { display: flex; gap: 16px; flex-wrap: wrap; margin-bottom: 48px; }
.hero-stats { display: flex; gap: 40px; flex-wrap: wrap; }
.hero-stat h3 { font-size: 2rem; color: var(--accent-light); font-weight: 800; }
.hero-stat p { font-size: .85rem; color: rgba(255,255,255,.7); margin-bottom: 0; }

/* Carousel Indicators */
.hero-indicators {
  position: absolute;
  bottom: 40px;
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  gap: 12px;
  z-index: 10;
}
.hero-dot {
  width: 12px;
  height: 12px;
  border-radius: 50%;
  border: 2px solid rgba(255,255,255,.6);
  background: transparent;
  cursor: pointer;
  padding: 0;
  transition: all .3s ease;
}
.hero-dot:hover { border-color: #fff; background: rgba(255,255,255,.3); }
.hero-dot.active { background: #fff; border-color: #fff; transform: scale(1.2); }

@media (max-width: 768px) {
  .hero { min-height: 80vh; }
  .hero-stats { gap: 24px; }
  .hero-stat h3 { font-size: 1.5rem; }
  .hero-indicators { bottom: 24px; }
}

/* ══════ STATS ══════ */
.stats-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 28px; margin: 40px 0; }
.stat-card {
  background: rgba(255,255,255,.1);
  border: 1px solid rgba(255,255,255,.15);
  border-radius: var(--radius-md);
  padding: 32px 24px;
  text-align: center;
  transition: var(--transition);
}
.stat-card:hover { transform: translateY(-4px); background: rgba(255,255,255,.15); }
.stat-card h3 { font-size: 2.4rem; color: var(--accent-light); font-weight: 800; margin-bottom: 8px; }
.stat-card p { font-size: .9rem; color: rgba(255,255,255,.8); margin-bottom: 0; }
@media (max-width: 768px) {
  .stats-grid { grid-template-columns: repeat(2, 1fr); gap: 16px; }
  .stat-card h3 { font-size: 1.8rem; }
}

/* ══════ PRODUCT CARDS ══════ */
.product-card {
  background: var(--white);
  border-radius: var(--radius-md);
  overflow: hidden;
  box-shadow: var(--shadow-sm);
  transition: var(--transition);
  display: flex;
  flex-direction: column;
  text-decoration: none;
  color: inherit;
  border: 1px solid var(--gray-200);
}
.product-card:hover { transform: translateY(-6px); box-shadow: var(--shadow-lg); color: inherit; }
.product-card .product-img,
.product-card-img {
  height: 220px;
  overflow: hidden;
  background: var(--gray-100);
}
.product-card .product-img img,
.product-card-img img { width: 100%; height: 100%; object-fit: cover; transition: transform .5s ease; }
.product-card:hover .product-img img,
.product-card:hover .product-card-img img { transform: scale(1.05); }
.product-card-body, .product-info {
  padding: 24px;
  flex: 1;
  display: flex;
  flex-direction: column;
}
.product-card-body h3, .product-info h3 { font-size: 1.1rem; margin-bottom: 8px; }
.product-card-body p, .product-info p { font-size: .9rem; color: var(--gray-500); flex: 1; }
.product-link, .learn-more {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  font-size: .88rem;
  font-weight: 600;
  color: var(--primary);
  margin-top: 16px;
  transition: var(--transition);
}
.product-link:hover, .learn-more:hover { color: var(--accent); gap: 8px; }

/* Product Tabs */
.product-tabs { display: flex; gap: 8px; margin-bottom: 32px; flex-wrap: wrap; justify-content: center; }
.tab-btn {
  padding: 10px 24px;
  font-size: .88rem;
  font-weight: 600;
  border: 2px solid var(--gray-200);
  background: var(--white);
  border-radius: 100px;
  cursor: pointer;
  transition: var(--transition);
  color: var(--gray-600);
}
.tab-btn:hover, .tab-btn.active { background: var(--primary); color: var(--white); border-color: var(--primary); }
.product-grid .product-card { display: flex; }
.product-grid .product-card.hidden { display: none; }

/* ══════ EQUIPMENT ══════ */
.equip-list { list-style: none; }
.equip-item {
  display: flex;
  align-items: flex-start;
  gap: 20px;
  padding: 20px 0;
  border-bottom: 1px solid rgba(255,255,255,.1);
}
.equip-num {
  font-size: .8rem;
  font-weight: 800;
  color: var(--accent);
  min-width: 32px;
  height: 32px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: rgba(212,168,67,.1);
  border-radius: 50%;
  flex-shrink: 0;
}
.equip-item h3 { font-size: 1.05rem; color: var(--white); margin-bottom: 4px; }
.equip-item p { font-size: .88rem; color: rgba(255,255,255,.65); margin-bottom: 0; }
.equip-image { border-radius: var(--radius-lg); overflow: hidden; }
.equip-image img { width: 100%; height: 100%; object-fit: cover; }
.equip-capabilities { padding: 60px 0; }
.capability-card {
  background: var(--white);
  border: 1px solid var(--gray-200);
  border-radius: var(--radius-md);
  padding: 32px;
  text-align: center;
  transition: var(--transition);
}
.capability-card:hover { box-shadow: var(--shadow-md); transform: translateY(-4px); }
.capability-card h3 { margin-bottom: 12px; }
.capability-card p { font-size: .9rem; color: var(--gray-500); margin-bottom: 0; }

/* ══════ CTA ══════ */
.cta {
  background: linear-gradient(135deg, var(--primary) 0%, var(--primary-dark) 100%);
  padding: 80px 0;
  text-align: center;
  color: var(--white);
}
.cta h2 { color: var(--white); margin-bottom: 16px; }
.cta p { color: rgba(255,255,255,.8); font-size: 1.05rem; max-width: 600px; margin: 0 auto 32px; }

/* ══════ PAGE BANNER ══════ */
.page-banner {
  background: linear-gradient(135deg, var(--primary) 0%, var(--primary-dark) 100%);
  padding: 120px 0 60px;
  margin-top: var(--nav-height);
  color: var(--white);
}
.page-banner h1 { color: var(--white); margin-bottom: 12px; }
.page-banner p { color: rgba(255,255,255,.8); font-size: 1.05rem; }

/* ══════ BREADCRUMB ══════ */
.breadcrumb {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: .85rem;
  color: rgba(255,255,255,.6);
  margin-bottom: 16px;
}
.breadcrumb a { color: rgba(255,255,255,.7); }
.breadcrumb a:hover { color: var(--white); }
.breadcrumb span { color: rgba(255,255,255,.5); }

/* ══════ ABOUT ══════ */
.about-image { position: relative; border-radius: var(--radius-lg); overflow: hidden; }
.about-image img { width: 100%; height: 400px; object-fit: cover; }
.about-image-badge {
  position: absolute;
  bottom: 24px;
  left: 24px;
  background: var(--accent);
  color: var(--white);
  padding: 16px 24px;
  border-radius: var(--radius-md);
  font-size: 1.2rem;
  font-weight: 800;
  line-height: 1.3;
}
.about-image-badge span { display: block; font-size: .8rem; font-weight: 500; }
.about-values { display: grid; grid-template-columns: repeat(3, 1fr); gap: 28px; margin-top: 40px; }
.value-card {
  background: var(--white);
  border: 1px solid var(--gray-200);
  border-radius: var(--radius-md);
  padding: 32px;
  text-align: center;
  transition: var(--transition);
}
.value-card:hover { box-shadow: var(--shadow-md); transform: translateY(-4px); }
.value-icon {
  width: 56px;
  height: 56px;
  background: linear-gradient(135deg, var(--primary), var(--primary-light));
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto 16px;
  color: var(--white);
}
@media (max-width: 768px) { .about-values { grid-template-columns: 1fr; } }

/* ══════ TIMELINE ══════ */
.timeline { position: relative; padding-left: 32px; }
.timeline::before { content: ''; position: absolute; left: 0; top: 0; bottom: 0; width: 2px; background: var(--gray-200); }
.timeline-item { position: relative; padding: 0 0 40px 32px; }
.timeline-dot {
  position: absolute;
  left: -38px;
  top: 4px;
  width: 14px;
  height: 14px;
  background: var(--accent);
  border-radius: 50%;
  border: 3px solid var(--white);
  box-shadow: 0 0 0 3px var(--accent);
}
.timeline-item .year { font-size: .8rem; font-weight: 700; color: var(--accent); letter-spacing: 1px; }
.timeline-item h4 { font-size: 1.1rem; margin: 4px 0 8px; }
.timeline-item p { font-size: .9rem; color: var(--gray-500); margin-bottom: 0; }

/* ══════ CERTIFICATIONS ══════ */
.cert-card {
  background: var(--white);
  border-radius: var(--radius-md);
  overflow: hidden;
  box-shadow: var(--shadow-sm);
  border: 1px solid var(--gray-200);
  transition: var(--transition);
}
.cert-card:hover { box-shadow: var(--shadow-md); }
.cert-card img { width: 100%; height: 240px; object-fit: cover; }
.cert-card-body { padding: 24px; }
.cert-card-body h3 { margin-bottom: 8px; }
.cert-card-body p { font-size: .9rem; color: var(--gray-500); margin-bottom: 0; }

/* ══════ CASES ══════ */
.case-card {
  background: var(--white);
  border: 1px solid var(--gray-200);
  border-radius: var(--radius-md);
  padding: 32px;
  transition: var(--transition);
}
.case-card:hover { box-shadow: var(--shadow-md); transform: translateY(-4px); }
.case-flag {
  display: inline-block;
  padding: 4px 14px;
  background: var(--gray-50);
  border-radius: 100px;
  font-size: .78rem;
  font-weight: 600;
  color: var(--primary);
  margin-bottom: 12px;
}
.case-card h3 { font-size: 1.1rem; margin-bottom: 12px; }
.case-card > .case-card-body > p,
.case-card p { font-size: .9rem; color: var(--gray-500); }
.case-quote {
  margin-top: 20px;
  padding: 16px 20px;
  background: var(--gray-50);
  border-left: 3px solid var(--accent);
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
}
.case-quote p { font-size: .88rem; font-style: italic; color: var(--gray-600); margin-bottom: 0; }

/* ══════ SERVICE ══════ */
.service-card {
  background: var(--white);
  border: 1px solid var(--gray-200);
  border-radius: var(--radius-md);
  padding: 36px;
  text-align: center;
  transition: var(--transition);
}
.service-card:hover { box-shadow: var(--shadow-md); transform: translateY(-4px); }
.service-icon {
  width: 72px;
  height: 72px;
  background: linear-gradient(135deg, var(--primary), var(--primary-light));
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto 20px;
  color: var(--white);
}
.service-card h3 { margin-bottom: 12px; }
.service-card p { font-size: .9rem; color: var(--gray-500); }
.service-card ul { text-align: left; margin-top: 16px; }
.service-card li {
  padding: 6px 0;
  font-size: .88rem;
  color: var(--gray-600);
  display: flex;
  align-items: center;
  gap: 8px;
}
.service-card li::before {
  content: '';
  width: 6px;
  height: 6px;
  background: var(--accent);
  border-radius: 50%;
  flex-shrink: 0;
}

/* Process Steps */
.process-card {
  text-align: center;
  padding: 24px;
}
.process-number {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 48px;
  height: 48px;
  background: var(--accent);
  color: var(--white);
  font-weight: 800;
  font-size: 1.1rem;
  border-radius: 50%;
  margin-bottom: 16px;
}
.process-card h3 { font-size: 1rem; margin-bottom: 8px; }
.process-card p { font-size: .88rem; color: var(--gray-500); margin-bottom: 0; }

/* FAQ */
.faq-item {
  background: var(--white);
  border: 1px solid var(--gray-200);
  border-radius: var(--radius-md);
  margin-bottom: 12px;
  overflow: hidden;
  cursor: pointer;
  transition: var(--transition);
}
.faq-item:hover { border-color: var(--primary-light); }
.faq-question {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 20px 24px;
}
.faq-question h4 { font-size: .95rem; font-weight: 600; }
.faq-toggle {
  width: 28px;
  height: 28px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--gray-100);
  border-radius: 50%;
  font-size: 1.2rem;
  color: var(--primary);
  transition: var(--transition);
  flex-shrink: 0;
}
.faq-item.open .faq-toggle { background: var(--primary); color: var(--white); transform: rotate(45deg); }
.faq-answer { max-height: 0; overflow: hidden; transition: max-height .4s ease; }
.faq-answer p { padding: 0 24px 20px; font-size: .9rem; color: var(--gray-500); margin-bottom: 0; }
.faq-item.open .faq-answer { max-height: 300px; }

/* ══════ CONTACT ══════ */
.contact-grid { gap: 48px; }
.contact-card {
  display: flex;
  gap: 16px;
  align-items: flex-start;
  padding: 20px 0;
  border-bottom: 1px solid var(--gray-100);
}
.contact-card-icon {
  width: 48px;
  height: 48px;
  background: var(--gray-50);
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--primary);
  flex-shrink: 0;
}
.contact-card-content h4 { font-size: .9rem; margin-bottom: 4px; }
.contact-card-content p { font-size: .88rem; color: var(--gray-500); margin-bottom: 0; }

/* Form */
.contact-form { background: var(--gray-50); border-radius: var(--radius-lg); padding: 40px; }
.contact-form h2 { margin-bottom: 24px; font-size: 1.5rem; }
.form-group { margin-bottom: 20px; }
.form-group label { display: block; font-size: .88rem; font-weight: 600; color: var(--gray-700); margin-bottom: 6px; }
.form-group input, .form-group select, .form-group textarea {
  width: 100%;
  padding: 12px 16px;
  font-size: .9rem;
  border: 1px solid var(--gray-300);
  border-radius: var(--radius-sm);
  transition: var(--transition);
  font-family: var(--font);
  background: var(--white);
}
.form-group input:focus, .form-group select:focus, .form-group textarea:focus {
  outline: none;
  border-color: var(--primary);
  box-shadow: 0 0 0 3px rgba(27,58,92,.1);
}
.form-group textarea { resize: vertical; min-height: 120px; }
.form-row { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }
@media (max-width: 576px) { .form-row { grid-template-columns: 1fr; } }

/* ══════ BLOG ══════ */
.blog-card {
  background: var(--white);
  border: 1px solid var(--gray-200);
  border-radius: var(--radius-md);
  overflow: hidden;
  transition: var(--transition);
}
.blog-card:hover { box-shadow: var(--shadow-md); transform: translateY(-4px); }
.blog-card-img {
  height: 200px;
  display: flex;
  align-items: flex-end;
  padding: 16px;
  position: relative;
}
.blog-card-img::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  height: 60%;
  background: linear-gradient(to top, rgba(0,0,0,.35), transparent);
  pointer-events: none;
}
.blog-category {
  display: inline-block;
  padding: 4px 14px;
  background: rgba(255,255,255,.95);
  border-radius: 100px;
  font-size: .78rem;
  font-weight: 700;
  color: var(--primary);
  position: relative;
  z-index: 1;
}
.blog-card-body { padding: 24px; }
.blog-date { font-size: .8rem; color: var(--gray-400); font-weight: 500; }
.blog-card-body h3 { font-size: 1.05rem; margin: 8px 0 12px; line-height: 1.4; }
.blog-card-body p { font-size: .88rem; color: var(--gray-500); }
.blog-link { display: inline-flex; align-items: center; gap: 4px; font-size: .88rem; font-weight: 600; color: var(--primary); margin-top: 12px; }
.blog-link:hover { color: var(--accent); gap: 8px; }

/* Blog Article */
.article-header {
  padding: 120px 0 40px;
  margin-top: var(--nav-height);
  background: var(--gray-50);
}
.article-meta {
  display: flex;
  align-items: center;
  gap: 16px;
  font-size: .85rem;
  color: var(--gray-500);
  margin-bottom: 16px;
  flex-wrap: wrap;
}
.article-meta .blog-category { position: static; }
.article-header h1 { font-size: clamp(1.6rem, 3.5vw, 2.4rem); max-width: 800px; }
.article-content { max-width: 800px; margin: 0 auto; padding: 48px 24px; }
.article-content h2 { font-size: 1.6rem; margin: 40px 0 16px; }
.article-content h3 { font-size: 1.2rem; margin: 32px 0 12px; }
.article-content p { font-size: 1rem; line-height: 1.9; color: var(--gray-600); margin-bottom: 20px; }
.article-content ul, .article-content ol { margin: 16px 0 20px 24px; }
.article-content li { font-size: .95rem; line-height: 1.8; color: var(--gray-600); margin-bottom: 8px; list-style: disc; }
.article-content ol li { list-style: decimal; }
.article-content img { border-radius: var(--radius-md); margin: 24px 0; }
.article-content blockquote {
  border-left: 4px solid var(--accent);
  padding: 16px 24px;
  background: var(--gray-50);
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
  margin: 24px 0;
}
.article-content blockquote p { font-style: italic; color: var(--gray-600); margin-bottom: 0; }

/* Table of Contents */
.toc {
  background: var(--gray-50);
  border: 1px solid var(--gray-200);
  border-radius: var(--radius-md);
  padding: 24px 28px;
  margin-bottom: 40px;
}
.toc h4 { font-size: .95rem; margin-bottom: 12px; }
.toc ol { padding-left: 20px; }
.toc li { list-style: decimal; margin-bottom: 6px; }
.toc a { font-size: .9rem; color: var(--primary); }
.toc a:hover { color: var(--accent); }

/* Related Articles */
.related-articles { padding: 60px 0; background: var(--gray-50); }

/* ══════ PRODUCT DETAIL ══════ */
.product-detail { padding: 40px 0; }
.product-detail-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 48px; align-items: start; }
.product-detail-img { border-radius: var(--radius-lg); overflow: hidden; }
.product-detail-img img { width: 100%; height: 400px; object-fit: cover; }
.product-detail-info h1 { font-size: 1.8rem; margin-bottom: 16px; }
.product-detail-info p { font-size: 1rem; color: var(--gray-500); line-height: 1.8; }
@media (max-width: 768px) { .product-detail-grid { grid-template-columns: 1fr; } }

/* Spec Table */
.spec-table { width: 100%; border-collapse: collapse; margin: 24px 0; font-size: .88rem; }
.spec-table th, .spec-table td {
  padding: 12px 16px;
  text-align: left;
  border-bottom: 1px solid var(--gray-200);
}
.spec-table th {
  background: var(--primary);
  color: var(--white);
  font-weight: 600;
  font-size: .82rem;
  text-transform: uppercase;
  letter-spacing: .5px;
}
.spec-table tr:nth-child(even) { background: var(--gray-50); }
.spec-table tr:hover { background: var(--gray-100); }
.spec-section { margin: 48px 0; }
.spec-section h2 { font-size: 1.5rem; margin-bottom: 16px; }

/* Application Tags */
.app-tags { display: flex; flex-wrap: wrap; gap: 8px; margin: 16px 0; }
.app-tag {
  padding: 6px 16px;
  background: var(--gray-50);
  border: 1px solid var(--gray-200);
  border-radius: 100px;
  font-size: .82rem;
  font-weight: 500;
  color: var(--gray-600);
}

/* ══════ FOOTER ══════ */
.site-footer {
  background: var(--gray-800);
  color: rgba(255,255,255,.7);
  padding: 64px 0 0;
}
.footer-grid { display: grid; grid-template-columns: 2fr 1fr 1fr 1fr; gap: 40px; }
.footer-brand p { font-size: .88rem; line-height: 1.7; margin: 16px 0; }
.footer-brand .nav-logo { color: var(--white); margin-bottom: 8px; }
.footer-col h4 { color: var(--white); font-size: .95rem; margin-bottom: 20px; }
.footer-col a { display: block; font-size: .88rem; color: rgba(255,255,255,.6); padding: 4px 0; transition: var(--transition); }
.footer-col a:hover { color: var(--accent-light); padding-left: 4px; }
.footer-contact-item { display: flex; gap: 12px; align-items: flex-start; margin-bottom: 12px; font-size: .88rem; }
.footer-contact-item svg { flex-shrink: 0; margin-top: 2px; color: var(--accent); }
.footer-bottom {
  border-top: 1px solid rgba(255,255,255,.1);
  padding: 20px 0;
  margin-top: 48px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 12px;
  font-size: .82rem;
}
.footer-social { display: flex; gap: 12px; }
.footer-social a {
  width: 36px;
  height: 36px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: rgba(255,255,255,.1);
  border-radius: 50%;
  color: rgba(255,255,255,.7);
  transition: var(--transition);
}
.footer-social a:hover { background: var(--accent); color: var(--white); }

@media (max-width: 992px) { .footer-grid { grid-template-columns: 1fr 1fr; } }
@media (max-width: 576px) { .footer-grid { grid-template-columns: 1fr; } }

/* ══════ WHATSAPP FLOAT ══════ */
.whatsapp-float {
  position: fixed;
  bottom: 24px;
  right: 24px;
  width: 56px;
  height: 56px;
  background: #25D366;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--white);
  box-shadow: var(--shadow-lg);
  z-index: 999;
  transition: var(--transition);
}
.whatsapp-float:hover { transform: scale(1.1); color: var(--white); }

/* ══════ ANIMATIONS ══════ */
.animate-in {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity .6s ease, transform .6s ease;
}
.animate-in.visible { opacity: 1; transform: translateY(0); }

/* ══════ COOKIE CONSENT ══════ */
.cookie-consent {
  position: fixed;
  bottom: 0;
  left: 0;
  right: 0;
  background: var(--gray-800);
  color: rgba(255,255,255,.9);
  padding: 16px 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  z-index: 9999;
  font-size: .85rem;
  box-shadow: 0 -4px 12px rgba(0,0,0,.2);
}
.cookie-consent.hidden { display: none; }
.cookie-consent a { color: var(--accent-light); text-decoration: underline; }
.cookie-btn {
  padding: 8px 24px;
  background: var(--accent);
  color: var(--white);
  border: none;
  border-radius: var(--radius-sm);
  cursor: pointer;
  font-weight: 600;
  font-size: .85rem;
  white-space: nowrap;
}

/* ══════ SCROLL TO TOP ══════ */
.scroll-top {
  position: fixed;
  bottom: 90px;
  right: 24px;
  width: 44px;
  height: 44px;
  background: var(--primary);
  color: var(--white);
  border: none;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  opacity: 0;
  visibility: hidden;
  transition: var(--transition);
  z-index: 998;
  box-shadow: var(--shadow-md);
}
.scroll-top.visible { opacity: 1; visibility: visible; }
.scroll-top:hover { background: var(--primary-light); transform: translateY(-3px); }

/* ══════ PRINT ══════ */
@media print {
  .navbar, .whatsapp-float, .scroll-top, .cookie-consent, .cta { display: none !important; }
  .hero { min-height: auto; padding: 40px 0; }
  .section { padding: 24px 0; }
}