/* Hommie Aluminum — shared base styles (extracted from index.html) */
/* ============================================================
   1. RESET & BASE
   ============================================================ */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }
body {
  font-family: 'Montserrat', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  font-size: 16px;
  line-height: 1.6;
  color: #2c3e50;
  background: #ffffff;
  overflow-x: hidden;
}
img { max-width: 100%; height: auto; display: block; }
a { text-decoration: none; color: inherit; transition: all 0.3s ease; }
button { font-family: inherit; cursor: pointer; border: none; background: none; }
ul { list-style: none; }

/* ============================================================
   2. CSS VARIABLES
   ============================================================ */
:root {
  --brand-blue: #3BA3DB;
  --brand-blue-light: #60B8F6;
  --brand-blue-tint: #D7ECF7;
  --brand-gray: #D7D7D7;
  --whatsapp-green: #25D366;
  --text-dark: #2c3e50;
  --text-medium: #5a6c7d;
  --text-light: #8696a7;
  --bg-light: #f8fafc;
  --bg-white: #ffffff;
  --shadow-sm: 0 2px 8px rgba(59, 163, 219, 0.08);
  --shadow-md: 0 4px 16px rgba(59, 163, 219, 0.12);
  --shadow-lg: 0 8px 32px rgba(59, 163, 219, 0.16);
  --shadow-xl: 0 16px 48px rgba(59, 163, 219, 0.20);
  --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  --container-max: 1280px;
  --header-height: 80px;
}

/* ============================================================
   3. TYPOGRAPHY
   ============================================================ */
h1, h2, h3, h4, h5, h6 { font-weight: 700; line-height: 1.3; color: var(--text-dark); }
h1 { font-size: clamp(2rem, 5vw, 3.5rem); }
h2 { font-size: clamp(1.75rem, 4vw, 2.75rem); margin-bottom: 1rem; }
h3 { font-size: clamp(1.25rem, 3vw, 1.75rem); margin-bottom: 0.75rem; }
.brand-text { font-family: 'Caveat', cursive; font-weight: 700; color: var(--brand-blue); }
.section-tag {
  display: inline-block;
  font-size: 0.875rem;
  font-weight: 600;
  letter-spacing: 2px;
  text-transform: uppercase;
  color: var(--brand-blue);
  margin-bottom: 0.75rem;
}

/* ============================================================
   4. LAYOUT HELPERS
   ============================================================ */
.container {
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 24px;
}
.section { padding: 80px 0; }
.section-sm { padding: 56px 0; }
.text-center { text-align: center; }
.lead { font-size: 1.125rem; color: var(--text-medium); line-height: 1.7; }

/* ============================================================
   5. BUTTONS
   ============================================================ */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 14px 32px;
  font-size: 1rem;
  font-weight: 600;
  border-radius: 50px;
  transition: var(--transition);
  cursor: pointer;
  white-space: nowrap;
}
.btn-primary {
  background: var(--brand-blue);
  color: white;
  box-shadow: var(--shadow-md);
}
.btn-primary:hover {
  background: var(--brand-blue-light);
  transform: translateY(-2px);
  box-shadow: var(--shadow-lg);
}
.btn-outline {
  background: transparent;
  color: white;
  border: 2px solid white;
}
.btn-outline:hover {
  background: white;
  color: var(--brand-blue);
  transform: translateY(-2px);
}
.btn-light {
  background: white;
  color: var(--brand-blue);
  box-shadow: var(--shadow-md);
}
.btn-light:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-lg);
}

/* ============================================================
   6. NAVIGATION (Sticky Top)
   ============================================================ */
.site-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: var(--header-height);
  background: rgba(255, 255, 255, 0.98);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid rgba(59, 163, 219, 0.1);
  z-index: 1000;
  transition: var(--transition);
}
.site-header.scrolled {
  box-shadow: var(--shadow-md);
  height: 72px;
}
.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 100%;
}
.logo {
  display: flex;
  align-items: center;
  gap: 8px;
  text-decoration: none;
}
.logo-icon {
  height: 64px;
  width: auto;
}
.logo-text-wrap {
  display: flex;
  flex-direction: column;
  line-height: 1;
}
.logo-text {
  font-family: 'Cormorant Garamond', Georgia, serif;
  font-size: 1.35rem;
  font-weight: 500;
  line-height: 1;
  letter-spacing: 0.05em;
  color: var(--brand-blue);
}
.logo-sub {
  font-size: 0.62rem;
  font-weight: 500;
  letter-spacing: 2.5px;
  color: var(--text-medium);
  text-transform: uppercase;
  margin-top: 3px;
}

.main-nav {
  display: flex;
  align-items: center;
  gap: 36px;
}
.nav-menu {
  display: flex;
  align-items: center;
  gap: 32px;
}
.nav-link {
  font-size: 0.95rem;
  font-weight: 500;
  color: var(--text-dark);
  position: relative;
  padding: 8px 0;
  transition: var(--transition);
}
.nav-link::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 50%;
  transform: translateX(-50%);
  width: 0;
  height: 2px;
  background: var(--brand-blue);
  transition: width 0.3s ease;
}
.nav-link:hover, .nav-link.active {
  color: var(--brand-blue);
}
.nav-link:hover::after, .nav-link.active::after {
  width: 100%;
}

/* Social icons in nav */
.nav-socials {
  display: flex;
  align-items: center;
  gap: 8px;
  padding-left: 24px;
  border-left: 1px solid var(--brand-gray);
}
.nav-social-icon {
  width: 38px;
  height: 38px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--bg-light);
  color: var(--text-medium);
  transition: var(--transition);
}
.nav-social-icon svg { width: 18px; height: 18px; }
.nav-social-icon:hover { transform: translateY(-2px); box-shadow: var(--shadow-md); }
.nav-social-icon.facebook:hover { background: #1877F2; color: white; }
.nav-social-icon.whatsapp:hover { background: var(--whatsapp-green); color: white; }
.nav-social-icon.alibaba:hover { background: #FF6A00; color: white; }
.nav-social-icon.youtube:hover { background: #FF0000; color: white; }
.nav-social-icon.email:hover { background: var(--brand-blue); color: white; }

/* Compact nav between the desktop and mobile-nav breakpoints:
   the header holds 5 menu items + 5 social icons, so it is tightened here
   to keep everything on one line instead of clipping the last icon. */
@media (min-width: 769px) and (max-width: 1120px) {
  .main-nav { gap: 20px; }
  .nav-menu { gap: 18px; }
  .nav-link { font-size: 0.9rem; }
  .nav-socials { padding-left: 16px; gap: 6px; }
  .nav-social-icon { width: 34px; height: 34px; }
  .nav-social-icon svg { width: 16px; height: 16px; }
  .logo-icon { height: 56px; }
  .logo-text { font-size: 1.2rem; }
  .logo-sub { letter-spacing: 2px; }
}
@media (min-width: 769px) and (max-width: 900px) {
  .main-nav { gap: 14px; }
  .nav-menu { gap: 12px; }
  .nav-link { font-size: 0.84rem; }
  .nav-socials { padding-left: 12px; gap: 5px; }
  .nav-social-icon { width: 30px; height: 30px; }
  .nav-social-icon svg { width: 14px; height: 14px; }
  .logo-icon { height: 48px; }
  .logo-text { font-size: 1.05rem; }
  .logo-sub { font-size: 0.55rem; letter-spacing: 1.6px; }
}

/* Mobile menu */
.menu-toggle {
  display: none;
  width: 40px;
  height: 40px;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  gap: 5px;
}
.menu-toggle span {
  width: 24px;
  height: 2px;
  background: var(--text-dark);
  border-radius: 2px;
  transition: var(--transition);
}
.menu-toggle.active span:nth-child(1) { transform: rotate(45deg) translate(5px, 5px); }
.menu-toggle.active span:nth-child(2) { opacity: 0; }
.menu-toggle.active span:nth-child(3) { transform: rotate(-45deg) translate(7px, -6px); }

/* ============================================================
   7. HERO BANNER CAROUSEL
   ============================================================ */
.hero {
  position: relative;
  margin-top: var(--header-height);
  height: calc(100vh - var(--header-height));
  min-height: 600px;
  max-height: 800px;
  overflow: hidden;
}
.hero-slide {
  position: absolute;
  inset: 0;
  opacity: 0;
  transition: opacity 1.2s ease;
}
.hero-slide.active { opacity: 1; }
.hero-slide img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}
.hero-slide::before {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, rgba(0, 0, 0, 0.55) 0%, rgba(0, 0, 0, 0.25) 60%, transparent 100%);
}
.hero-content {
  position: absolute;
  inset: 0;
  display: flex;
  align-items: center;
  padding: 0 80px;
}
.hero-text {
  max-width: 620px;
  color: white;
}
.hero-tag {
  display: inline-block;
  font-size: 0.875rem;
  font-weight: 600;
  letter-spacing: 3px;
  text-transform: uppercase;
  color: var(--brand-blue-light);
  margin-bottom: 1rem;
  opacity: 0;
  transform: translateY(20px);
  animation: slideUp 0.8s ease 0.3s forwards;
}
.hero-title {
  font-size: clamp(2rem, 4.5vw, 3.5rem);
  font-weight: 800;
  line-height: 1.15;
  margin-bottom: 1.25rem;
  color: white;
  opacity: 0;
  transform: translateY(30px);
  animation: slideUp 0.8s ease 0.5s forwards;
}
.hero-title .accent { color: var(--brand-blue-light); font-family: 'Caveat', cursive; font-weight: 700; }
.hero-subtitle {
  font-size: 1.125rem;
  line-height: 1.6;
  margin-bottom: 2rem;
  color: rgba(255, 255, 255, 0.9);
  opacity: 0;
  transform: translateY(30px);
  animation: slideUp 0.8s ease 0.7s forwards;
}
.hero-actions {
  display: flex;
  gap: 16px;
  flex-wrap: wrap;
  opacity: 0;
  transform: translateY(30px);
  animation: slideUp 0.8s ease 0.9s forwards;
}
@keyframes slideUp {
  to { opacity: 1; transform: translateY(0); }
}

/* Carousel controls */
.hero-controls {
  position: absolute;
  bottom: 40px;
  left: 80px;
  display: flex;
  align-items: center;
  gap: 16px;
  z-index: 5;
}
.hero-dot {
  width: 32px;
  height: 4px;
  background: rgba(255, 255, 255, 0.4);
  border-radius: 2px;
  cursor: pointer;
  transition: var(--transition);
}
.hero-dot.active { background: var(--brand-blue-light); width: 48px; }
.hero-arrow {
  position: absolute;
  top: 50%;
  transform: translateY(-50%);
  width: 56px;
  height: 56px;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.15);
  backdrop-filter: blur(8px);
  color: white;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  z-index: 5;
  transition: var(--transition);
}
.hero-arrow:hover { background: rgba(255, 255, 255, 0.3); }
.hero-arrow.prev { left: 24px; }
.hero-arrow.next { right: 24px; }

/* ============================================================
   8. COMPANY STRENGTH STRIP
   ============================================================ */
.strength-strip {
  background: linear-gradient(135deg, var(--brand-blue) 0%, var(--brand-blue-light) 100%);
  padding: 48px 0;
}
.strength-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 32px;
  color: white;
}
.strength-item {
  text-align: center;
  padding: 0 16px;
  position: relative;
}
.strength-item:not(:last-child)::after {
  content: '';
  position: absolute;
  right: -16px;
  top: 10%;
  height: 80%;
  width: 1px;
  background: rgba(255, 255, 255, 0.3);
}
.strength-num {
  font-size: 2.75rem;
  font-weight: 800;
  line-height: 1;
  margin-bottom: 0.5rem;
  font-family: 'Montserrat', sans-serif;
}
.strength-label {
  font-size: 0.875rem;
  font-weight: 500;
  letter-spacing: 1px;
  text-transform: uppercase;
  opacity: 0.95;
}

/* ============================================================
   9. PRODUCT CATEGORIES
   ============================================================ */
.products-section { background: var(--bg-light); }
.section-header { text-align: center; margin-bottom: 56px; }
.section-header .lead { max-width: 720px; margin: 0 auto; }

.products-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 28px;
}
.product-card {
  position: relative;
  border-radius: 16px;
  overflow: hidden;
  background: white;
  box-shadow: var(--shadow-sm);
  transition: var(--transition);
  cursor: pointer;
}
.product-card:hover {
  transform: translateY(-8px);
  box-shadow: var(--shadow-lg);
}
.product-image {
  position: relative;
  height: 280px;
  overflow: hidden;
}
.product-image img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.6s ease;
}
.product-card:hover .product-image img { transform: scale(1.08); }
.product-image::after {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(to top, rgba(0, 0, 0, 0.3) 0%, transparent 60%);
}
.product-info {
  padding: 24px;
  text-align: center;
}
.product-name {
  font-size: 1.25rem;
  font-weight: 700;
  margin-bottom: 0.5rem;
  color: var(--text-dark);
}
.product-tagline {
  font-size: 0.9rem;
  color: var(--text-medium);
  margin-bottom: 16px;
}
.product-link {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--brand-blue);
  letter-spacing: 0.5px;
  text-transform: uppercase;
}
.product-link::after {
  content: '→';
  transition: transform 0.3s ease;
}
.product-card:hover .product-link::after { transform: translateX(4px); }

/* ============================================================
   10. WHY CHOOSE US
   ============================================================ */
.features-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 32px;
}
.feature-card {
  background: white;
  padding: 40px 32px;
  border-radius: 16px;
  border: 1px solid rgba(59, 163, 219, 0.1);
  transition: var(--transition);
  text-align: center;
}
.feature-card:hover {
  border-color: var(--brand-blue);
  transform: translateY(-4px);
  box-shadow: var(--shadow-md);
}
.feature-icon {
  width: 72px;
  height: 72px;
  margin: 0 auto 20px;
  border-radius: 50%;
  background: var(--brand-blue-tint);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--brand-blue);
}
.feature-icon svg { width: 36px; height: 36px; }
.feature-title {
  font-size: 1.25rem;
  font-weight: 700;
  margin-bottom: 0.75rem;
}
.feature-desc { font-size: 0.95rem; color: var(--text-medium); line-height: 1.7; }

/* ============================================================
   11. CERTIFICATIONS
   ============================================================ */
.certifications-section { background: var(--bg-light); }
.cert-main-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 28px;
  margin-bottom: 48px;
}
.cert-main-card {
  background: white;
  border-radius: 16px;
  padding: 24px;
  text-align: center;
  box-shadow: var(--shadow-sm);
  transition: var(--transition);
  cursor: pointer;
}
.cert-main-card:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-lg);
}
.cert-main-image {
  height: 320px;
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 20px;
  border-radius: 8px;
  overflow: hidden;
  background: var(--bg-light);
}
.cert-main-image img {
  max-height: 100%;
  max-width: 100%;
  object-fit: contain;
}
.cert-name {
  font-size: 1.125rem;
  font-weight: 700;
  margin-bottom: 0.5rem;
  color: var(--text-dark);
}
.cert-meta {
  font-size: 0.85rem;
  color: var(--text-medium);
  line-height: 1.5;
}
.cert-meta strong { color: var(--brand-blue); }

.cert-patent-card {
  background: linear-gradient(135deg, var(--brand-blue-tint) 0%, #ecf6fc 100%);
  border: 1px solid rgba(59, 163, 219, 0.2);
  border-radius: 16px;
  padding: 16px;
  width: min(662px, 100%);   /* 630 图 + 2×16 内边距；窄屏自动收缩 */
  margin: 0 auto;            /* 水平居中 */
  box-sizing: border-box;
}
.cert-patent-image {
  width: 100%;
  background: white;
  border-radius: 8px;
  overflow: hidden;
  box-shadow: 0 2px 6px rgba(0,0,0,0.08);
  border: 1px solid #E5E5E5;
}
.cert-patent-image img {
  width: 100%;
  height: auto;
  display: block;
}

/* ============================================================
   12. CLIENTS / PARTNERS
   ============================================================ */
.clients-grid {
  display: grid;
  grid-template-columns: repeat(6, 1fr);
  gap: 28px;
  align-items: center;
  justify-items: center;
}
.client-logo {
  width: 100%;
  height: 110px;
  background: white;
  border: 1px solid #EAEAEA;
  border-radius: 12px;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 18px;
  filter: grayscale(100%) opacity(0.55);
  transition: var(--transition);
  box-shadow: 0 2px 8px rgba(0,0,0,0.04);
}
.client-logo:hover {
  filter: grayscale(0) opacity(1);
  transform: translateY(-4px);
  box-shadow: 0 8px 24px rgba(59,163,219,0.18);
  border-color: var(--brand-blue);
}
.client-logo img {
  max-height: 100%;
  max-width: 100%;
  object-fit: contain;
  display: block;
}

/* ============================================================
   13. CONTACT CTA
   ============================================================ */
.cta-section {
  background: linear-gradient(135deg, var(--brand-blue) 0%, var(--brand-blue-light) 100%);
  padding: 80px 0;
  position: relative;
  overflow: hidden;
}
.cta-section::before {
  content: '';
  position: absolute;
  inset: 0;
  background: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='100' height='100' viewBox='0 0 100 100'%3E%3Ccircle cx='50' cy='50' r='40' fill='none' stroke='%23ffffff' stroke-opacity='0.08' stroke-width='1'/%3E%3C/svg%3E") repeat;
  opacity: 0.5;
}
.cta-inner {
  position: relative;
  text-align: center;
  color: white;
}
.cta-title {
  font-size: clamp(1.75rem, 4vw, 2.5rem);
  font-weight: 800;
  color: white;
  margin-bottom: 1rem;
}
.cta-subtitle {
  font-size: 1.125rem;
  margin-bottom: 2rem;
  opacity: 0.95;
  max-width: 640px;
  margin-left: auto;
  margin-right: auto;
}
.cta-actions {
  display: flex;
  gap: 16px;
  justify-content: center;
  flex-wrap: wrap;
}
/* ===== Inquiry Form (CTA) ===== */
.cta-form-card {
  max-width: 820px;
  margin: 0 auto 2rem;
  background: #ffffff;
  border-radius: 18px;
  padding: 2rem 2.25rem 1.75rem;
  box-shadow: 0 18px 45px rgba(15, 60, 90, 0.18);
  text-align: left;
  position: relative;
  z-index: 1;
}
.cta-form-card h3 {
  font-size: 1.4rem;
  font-weight: 700;
  color: var(--text-dark);
  margin-bottom: 4px;
  text-align: center;
}
.cta-form-sub {
  font-size: 0.92rem;
  color: var(--text-medium);
  text-align: center;
  margin-bottom: 1.4rem;
}
.form-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 14px;
}
.form-field { display: flex; flex-direction: column; gap: 6px; }
.form-field label {
  font-size: 0.72rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--text-medium);
}
.form-field input,
.form-field textarea {
  width: 100%;
  box-sizing: border-box;
  padding: 11px 14px;
  border: 1.5px solid #E2E8F0;
  border-radius: 9px;
  font-size: 0.95rem;
  font-family: inherit;
  color: var(--text-dark);
  background: #FBFCFE;
  transition: border-color 0.2s ease, box-shadow 0.2s ease, background 0.2s ease;
}
.form-field input::placeholder,
.form-field textarea::placeholder { color: #A0AEC0; }
.form-field input:focus,
.form-field textarea:focus {
  outline: none;
  border-color: var(--brand-blue);
  box-shadow: 0 0 0 3px rgba(59, 163, 219, 0.15);
  background: #ffffff;
}
.form-field textarea { resize: vertical; min-height: 96px; }
.form-field-full { grid-column: 1 / -1; }
.form-footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  margin-top: 1.15rem;
  flex-wrap: wrap;
}
.form-hint { font-size: 0.8rem; color: var(--text-light); }
.form-submit-btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: var(--brand-blue);
  color: #ffffff;
  border: none;
  cursor: pointer;
  padding: 13px 30px;
  border-radius: 10px;
  font-weight: 700;
  font-size: 0.95rem;
  font-family: inherit;
  transition: background 0.25s ease, transform 0.25s ease, box-shadow 0.25s ease;
}
.form-submit-btn:hover {
  background: #2f8fc4;
  transform: translateY(-1px);
  box-shadow: 0 6px 16px rgba(59, 163, 219, 0.3);
}
.form-submit-btn:disabled { opacity: 0.65; cursor: not-allowed; transform: none; box-shadow: none; }
.form-status {
  display: none;
  margin-top: 12px;
  padding: 11px 14px;
  border-radius: 9px;
  font-size: 0.9rem;
  line-height: 1.45;
}
.form-status.success { display: block; background: #ECFDF5; color: #047857; border: 1px solid #A7F3D0; }
.form-status.error { display: block; background: #FEF2F2; color: #B91C1C; border: 1px solid #FECACA; }
@media (max-width: 768px) {
  .cta-form-card { padding: 1.5rem 1.15rem 1.35rem; margin-bottom: 1.6rem; }
  .form-grid { grid-template-columns: 1fr; }
  .form-footer { justify-content: center; text-align: center; }
}


/* ============================================================
   14. FOOTER
   ============================================================ */
.site-footer {
  background: #1a2a3a;
  color: rgba(255, 255, 255, 0.8);
  padding: 64px 0 24px;
}
.footer-grid {
  display: grid;
  grid-template-columns: 1.5fr 1fr 1fr 1.2fr;
  gap: 48px;
  margin-bottom: 48px;
}
.footer-col h4 {
  color: white;
  font-size: 1.05rem;
  font-weight: 700;
  margin-bottom: 20px;
  letter-spacing: 0.5px;
}
.footer-brand .logo-icon { height: 42px; width: auto; }
.footer-brand .logo-text { color: white; font-size: 1.5rem; }
.footer-brand .logo-sub { color: rgba(255, 255, 255, 0.6); font-size: 0.6rem; }
.footer-about {
  font-size: 0.9rem;
  line-height: 1.7;
  margin-top: 16px;
  color: rgba(255, 255, 255, 0.7);
}
.footer-links li { margin-bottom: 12px; }
.footer-links a {
  font-size: 0.9rem;
  color: rgba(255, 255, 255, 0.7);
  transition: var(--transition);
}
.footer-links a:hover { color: var(--brand-blue-light); padding-left: 4px; }
.footer-contact li {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  font-size: 0.9rem;
  color: rgba(255, 255, 255, 0.7);
  margin-bottom: 14px;
  line-height: 1.6;
}
.footer-contact svg {
  width: 16px;
  height: 16px;
  flex-shrink: 0;
  color: var(--brand-blue-light);
  margin-top: 4px;
}
.footer-socials {
  display: flex;
  gap: 12px;
  margin-top: 8px;
}
.footer-social-icon {
  width: 44px;
  height: 44px;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.08);
  color: rgba(255, 255, 255, 0.8);
  display: flex;
  align-items: center;
  justify-content: center;
  transition: var(--transition);
}
.footer-social-icon svg { width: 20px; height: 20px; }
.footer-social-icon:hover { transform: translateY(-3px); color: white; }
.footer-social-icon.facebook:hover { background: #1877F2; }
.footer-social-icon.whatsapp:hover { background: var(--whatsapp-green); }
.footer-social-icon.alibaba:hover { background: #FF6A00; }
.footer-social-icon.alibaba img { width: 22px; height: auto; display: block; }
.footer-social-icon.email:hover { background: var(--brand-blue); }
.footer-social-icon.youtube:hover { background: #FF0000; }

.footer-bottom {
  border-top: 1px solid rgba(255, 255, 255, 0.1);
  padding-top: 24px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 16px;
  font-size: 0.85rem;
  color: rgba(255, 255, 255, 0.5);
}

/* ============================================================
   15. FLOATING BUTTONS
   ============================================================ */
.floating-buttons {
  position: fixed;
  bottom: 24px;
  right: 24px;
  display: flex;
  flex-direction: column;
  gap: 12px;
  z-index: 999;
}
.float-whatsapp-wrap {
  position: relative;
}
.float-btn {
  width: 56px;
  height: 56px;
  border-radius: 50%;
  background: white;
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: var(--shadow-lg);
  transition: var(--transition);
  position: relative;
  cursor: pointer;
  border: none;
  text-decoration: none;
}
.float-btn:hover { transform: translateY(-4px); box-shadow: var(--shadow-xl); }
.float-btn:active { transform: scale(0.95); }
.float-btn svg { width: 28px; height: 28px; }
.float-btn.whatsapp { color: var(--whatsapp-green); }
.float-btn.email { color: var(--brand-blue); }

.float-btn::before {
  content: attr(data-label);
  position: absolute;
  right: calc(100% + 12px);
  top: 50%;
  transform: translateY(-50%) translateX(8px);
  background: var(--text-dark);
  color: white;
  font-size: 0.875rem;
  font-weight: 500;
  padding: 6px 14px;
  border-radius: 6px;
  white-space: nowrap;
  opacity: 0;
  pointer-events: none;
  transition: var(--transition);
}
.float-btn:hover::before {
  opacity: 1;
  transform: translateY(-50%) translateX(0);
}
.float-btn::after {
  content: '';
  position: absolute;
  right: -6px;
  top: 50%;
  transform: translateY(-50%);
  border: 6px solid transparent;
  border-left-color: var(--text-dark);
  opacity: 0;
  transition: var(--transition);
}
.float-btn:hover::after { opacity: 1; }

/* Floating pulse animation */
.float-btn.whatsapp { animation: floatPulse 2s ease-in-out infinite; }
@keyframes floatPulse {
  0%, 100% { box-shadow: var(--shadow-lg), 0 0 0 0 rgba(37, 211, 102, 0.4); }
  50% { box-shadow: var(--shadow-lg), 0 0 0 12px rgba(37, 211, 102, 0); }
}

/* WhatsApp QR popup */
.float-qr-popup {
  position: absolute;
  right: calc(100% + 16px);
  bottom: 0;
  width: 280px;
  background: white;
  border-radius: 14px;
  box-shadow: 0 12px 40px rgba(0,0,0,0.18);
  padding: 20px;
  opacity: 0;
  transform: translateX(12px) scale(0.95);
  transform-origin: bottom right;
  pointer-events: none;
  transition: all 0.25s cubic-bezier(0.4, 0, 0.2, 1);
  border: 1px solid rgba(59, 163, 219, 0.15);
}
.float-qr-popup::after {
  content: '';
  position: absolute;
  right: -8px;
  bottom: 22px;
  width: 16px;
  height: 16px;
  background: white;
  transform: rotate(45deg);
  border-right: 1px solid rgba(59, 163, 219, 0.15);
  border-top: 1px solid rgba(59, 163, 219, 0.15);
}
.float-qr-popup.active {
  opacity: 1;
  transform: translateX(0) scale(1);
  pointer-events: auto;
}
.float-qr-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 12px;
}
.float-qr-title {
  font-size: 0.95rem;
  font-weight: 700;
  color: var(--whatsapp-green);
}
.float-qr-close {
  width: 24px;
  height: 24px;
  border-radius: 50%;
  border: none;
  background: #F0F0F0;
  color: var(--text-medium);
  cursor: pointer;
  font-size: 1.2rem;
  line-height: 1;
  display: flex;
  align-items: center;
  justify-content: center;
}
.float-qr-close:hover { background: #E0E0E0; color: var(--text-dark); }
.float-qr-image {
  background: #FAFAFA;
  border-radius: 10px;
  padding: 12px;
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 12px;
}
.float-qr-image img {
  width: 180px;
  height: 180px;
  display: block;
}
.float-qr-info {
  text-align: center;
  font-size: 0.85rem;
  color: var(--text-medium);
}
.float-qr-info strong {
  display: block;
  color: var(--text-dark);
  font-size: 0.95rem;
  margin-bottom: 6px;
}
.float-qr-link {
  display: inline-block;
  color: var(--whatsapp-green);
  font-weight: 600;
  text-decoration: none;
  margin-top: 4px;
}
.float-qr-link:hover { text-decoration: underline; }

/* ============================================================
   16. RESPONSIVE
   ============================================================ */
@media (max-width: 1024px) {
  .products-grid { grid-template-columns: repeat(2, 1fr); }
  .strength-grid { grid-template-columns: repeat(2, 1fr); gap: 24px; }
  .strength-item:nth-child(2)::after { display: none; }
  .clients-grid { grid-template-columns: repeat(4, 1fr); }
  .footer-grid { grid-template-columns: 1fr 1fr; }
}

@media (max-width: 768px) {
  :root { --header-height: 64px; }
  .section { padding: 56px 0; }

  /* Mobile nav */
  .menu-toggle { display: flex; }
  .main-nav {
    position: fixed;
    top: var(--header-height);
    left: 0;
    right: 0;
    background: white;
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    padding: 0;
    box-shadow: var(--shadow-md);
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.3s ease;
  }
  .main-nav.active { max-height: 600px; }
  .nav-menu {
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    padding: 16px 0;
  }
  .nav-menu li { width: 100%; }
  .nav-link {
    display: block;
    padding: 14px 24px;
    border-bottom: 1px solid rgba(0, 0, 0, 0.05);
  }
  .nav-link::after { display: none; }
  .nav-socials {
    border-left: none;
    border-top: 1px solid var(--brand-gray);
    padding: 16px 24px;
    justify-content: center;
  }
  .logo-icon { height: 50px; }
  .logo-text { font-size: 1.15rem; }
  .logo-sub { font-size: 0.55rem; }

  /* Hero */
  .hero { height: 80vh; min-height: 500px; }
  .hero-content { padding: 0 24px; }
  .hero-controls { left: 24px; bottom: 24px; }
  .hero-arrow { width: 44px; height: 44px; }
  .hero-arrow.prev { left: 8px; }
  .hero-arrow.next { right: 8px; }

  /* Sections */
  .products-grid { grid-template-columns: 1fr; gap: 20px; }
  .features-grid { grid-template-columns: 1fr; gap: 20px; }
  .cert-main-grid { grid-template-columns: 1fr; }
  .clients-grid { grid-template-columns: repeat(3, 1fr); gap: 16px; }
  .client-logo { height: 90px; padding: 14px; }

  /* Certs */
  .cert-main-image { height: 240px; }
  .cert-patent-card { padding: 10px; max-width: 100%; }
  .cert-patent-image { width: 100%; }

  /* Footer */
  .footer-grid { grid-template-columns: 1fr; gap: 32px; }
  .footer-bottom { flex-direction: column; text-align: center; }

  /* Floating buttons */
  .floating-buttons { bottom: 16px; right: 16px; gap: 10px; }
  .float-btn { width: 48px; height: 48px; }
  .float-btn svg { width: 24px; height: 24px; }
  .float-btn::before { display: none; }
  .float-btn::after { display: none; }
  .float-qr-popup { right: calc(100% + 12px); padding: 16px; }
  .float-qr-image img { width: 150px; height: 150px; }
}

@media (max-width: 480px) {
  .container { padding: 0 16px; }
  .hero-actions { flex-direction: column; align-items: stretch; }
  .btn { padding: 12px 24px; font-size: 0.9rem; }
  .strength-grid { grid-template-columns: 1fr; gap: 20px; }
  .strength-item::after { display: none !important; }
}