/* =============================================
   CNBYG BAOYU HOLDING - Main Stylesheet
   Design: Industrial Precision | Dark Navy + White
   Font: Barlow Condensed (titles) + Source Sans 3 (body)
   Primary: #1a5fb4  Accent: #e8a020  Dark: #0d1f3c
   ============================================= */

/* ---- Google Fonts ---- */
@import url('https://fonts.googleapis.com/css2?family=Barlow+Condensed:wght@600;700;800&family=Barlow:wght@400;500;600;700&family=Source+Sans+3:wght@300;400;600&display=swap');

/* ---- Reset & Base ---- */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; font-size: 16px; }
body {
  font-family: 'Source Sans 3', sans-serif;
  color: #1a1a2e;
  background: #fff;
  overflow-x: hidden;
}
img { max-width: 100%; display: block; }
a { text-decoration: none; color: inherit; }
ul { list-style: none; }

/* ---- CSS Variables ---- */
:root {
  --blue:      #1a5fb4;
  --blue-dark: #0d3a7a;
  --blue-deep: #0d1f3c;
  --blue-light:#e8f0fc;
  --accent:    #e8a020;
  --white:     #ffffff;
  --gray-100:  #f5f7fa;
  --gray-200:  #e8ecf2;
  --gray-400:  #9ba3b2;
  --gray-600:  #5a6275;
  --gray-800:  #2c3345;
  --shadow-sm: 0 2px 8px rgba(13,31,60,.08);
  --shadow-md: 0 8px 30px rgba(13,31,60,.12);
  --shadow-lg: 0 16px 50px rgba(13,31,60,.18);
  --radius:    2px;
  --transition: all .28s cubic-bezier(.4,0,.2,1);
}

/* ---- Container ---- */
.container {
  width: 100%;
  max-width: 1280px;
  margin: 0 auto;
  padding: 0 2rem;
}
@media (max-width: 768px) { .container { padding: 0 1rem; } }

/* ---- Section Header ---- */
.section-header { text-align: center; margin-bottom: 3rem; }
.section-title {
  font-family: 'Barlow Condensed', sans-serif;
  font-weight: 700;
  font-size: clamp(1.6rem, 3vw, 2.5rem);
  letter-spacing: .08em;
  text-transform: uppercase;
  color: var(--gray-800);
}
.section-line {
  width: 3rem; height: 3px;
  background: var(--blue);
  margin: .75rem auto 0;
}
.section-desc {
  color: var(--gray-400);
  font-size: 1rem;
  margin-top: .75rem;
  max-width: 520px;
  margin-left: auto;
  margin-right: auto;
  line-height: 1.7;
}

/* ---- Buttons ---- */
.btn {
  display: inline-block;
  font-family: 'Barlow', sans-serif;
  font-weight: 600;
  font-size: .8125rem;
  letter-spacing: .1em;
  text-transform: uppercase;
  padding: .75rem 2rem;
  border: 2px solid transparent;
  cursor: pointer;
  transition: var(--transition);
  border-radius: var(--radius);
}
.btn-primary { background: var(--blue); color: #fff; border-color: var(--blue); }
.btn-primary:hover { background: var(--blue-dark); border-color: var(--blue-dark); transform: translateY(-2px); box-shadow: 0 6px 20px rgba(26,95,180,.35); }
.btn-outline { background: transparent; color: #fff; border-color: rgba(255,255,255,.7); }
.btn-outline:hover { background: #fff; color: var(--blue-deep); border-color: #fff; transform: translateY(-2px); }
.btn-blue-outline { background: transparent; color: var(--blue); border-color: var(--blue); }
.btn-blue-outline:hover { background: var(--blue); color: #fff; transform: translateY(-2px); }

/* ---- Scroll Animations ---- */
.fade-up { opacity: 0; transform: translateY(28px); transition: opacity .65s cubic-bezier(.4,0,.2,1), transform .65s cubic-bezier(.4,0,.2,1); }
.fade-in { opacity: 0; transition: opacity .65s cubic-bezier(.4,0,.2,1); }
.fade-up.visible, .fade-in.visible { opacity: 1; transform: translateY(0); }

/* =============================================
   NAVBAR
   ============================================= */
#navbar {
  position: fixed; top: 0; left: 0; right: 0; z-index: 1000;
  background: rgba(13,31,60,.92);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid rgba(255,255,255,.06);
  transition: background .3s, box-shadow .3s;
}
#navbar.scrolled {
  background: rgba(13,31,60,.98);
  box-shadow: 0 2px 20px rgba(0,0,0,.35);
}
.nav-inner {
  display: flex; align-items: center; justify-content: space-between;
  /* height: 64px; */
}
/* Logo */
.nav-logo { display: flex; flex-direction: column; gap: 0; }
.nav-logo-main {
  font-family: 'Barlow Condensed', sans-serif;
  font-weight: 800; font-size: 1.5rem;
  color: #fff; letter-spacing: .05em; line-height: 1;
}
.nav-logo-sub {
  font-family: 'Barlow', sans-serif;
  font-size: .55rem; color: rgba(255,255,255,.55);
  letter-spacing: .18em; text-transform: uppercase;
}
/* Nav links */
.nav-links { display: flex; align-items: center; gap: .25rem; }
.nav-item { position: relative; }
.nav-link {
  display: flex; align-items: center; gap: .25rem;
  font-family: 'Barlow', sans-serif;
  font-weight: 500; font-size: 1rem;
  letter-spacing: .06em; text-transform: uppercase;
  color: rgba(255,255,255,.85);
  padding: .5rem .75rem;
  transition: color .2s;
  white-space: nowrap;
}
.nav-link:hover { color: #fff; }
.nav-link svg { width: 10px; height: 10px; opacity: .6; }
/* Dropdown */
.dropdown {
  position: absolute; top: 100%; left: 50%;
  transform: translateX(-50%) translateY(-6px);
  background: #fff; min-width: 200px;
  border-top: 2px solid var(--blue);
  box-shadow: var(--shadow-md);
  opacity: 0; visibility: hidden;
  transition: var(--transition);
  pointer-events: none;
}
.nav-item:hover .dropdown { opacity: 1; visibility: visible; transform: translateX(-50%) translateY(0); pointer-events: all; }
.dropdown a {
  display: block; padding: .6rem 1.25rem;
  font-size: .8125rem; color: var(--gray-600);
  border-bottom: 1px solid var(--gray-100);
  transition: background .15s, color .15s, padding-left .15s;
}
.dropdown a:last-child { border-bottom: none; }
.dropdown a:hover { background: var(--gray-100); color: var(--blue); padding-left: 1.5rem; }
/* Nav right */
.nav-right { display: flex; align-items: center; gap: 1rem; }
.nav-phone {
  font-family: 'Barlow', sans-serif; font-size: .75rem;
  color: rgba(255,255,255,.7); display: flex; align-items: center; gap: .4rem;
}
.nav-phone svg { width: 13px; height: 13px; }
.nav-lang {
  display: flex; align-items: center; gap: .3rem;
  font-family: 'Barlow', sans-serif; font-size: .75rem;
  color: rgba(255,255,255,.75); padding: .35rem .875rem;
  border: 1px solid rgba(255,255,255,.25); cursor: pointer;
  transition: border-color .2s;
}
.nav-lang:hover { border-color: rgba(255,255,255,.6); }
/* Hamburger */
.nav-toggle { display: none; flex-direction: column; gap: 5px; cursor: pointer; padding: .5rem; }
.nav-toggle span { display: block; width: 22px; height: 2px; background: #fff; transition: var(--transition); }
.nav-toggle.open span:nth-child(1) { transform: rotate(45deg) translate(5px, 5px); }
.nav-toggle.open span:nth-child(2) { opacity: 0; }
.nav-toggle.open span:nth-child(3) { transform: rotate(-45deg) translate(5px, -5px); }
/* Mobile menu */
.mobile-menu {
  display: none; position: fixed;
  top: 64px; left: 0; right: 0; bottom: 0;
  background: var(--blue-deep); z-index: 999;
  padding: 2rem 1.5rem; overflow-y: auto;
}
.mobile-menu.open { display: block; }
.mobile-menu a {
  display: block; padding: 1.25rem 0;
  font-family: 'Barlow', sans-serif; font-weight: 600;
  font-size: .9375rem; color: rgba(255,255,255,.85);
  border-bottom: 1px solid rgba(255,255,255,.08);
  letter-spacing: .05em; text-transform: uppercase;
}
.mobile-menu a:hover { color: #fff; }

/* =============================================
   HERO SECTION
   ============================================= */
#hero {
  position: relative; min-height: 800px;
  display: flex; flex-direction: column; justify-content: center;
  background-image: url('images/banner.png');
  background-size: cover; background-position: center;
  overflow: hidden;
  margin-top: 20px;
}
.hero-overlay {
  position: absolute; inset: 0;
  background: linear-gradient(105deg,
    rgba(13,31,60,.96) 0%,
    rgba(13,31,60,.85) 40%,
    rgba(13, 31, 60, 0) 70%,
    rgba(13,31,60,.12) 100%);
}
.hero-content { position: relative; z-index: 2; padding: 9rem 0 5rem; }
.hero-badge {
  display: flex; align-items: center; gap: .75rem; margin-bottom: 1.25rem;
}
.hero-badge-line { width: 2.5rem; height: 2px; background: var(--accent); }
.hero-badge-text {
  font-family: 'Barlow', sans-serif; font-weight: 700;
  font-size: .875rem; letter-spacing: .2em; text-transform: uppercase;
  color: rgba(180,210,255,.9);
}
.hero-title {
  font-family: 'Barlow Condensed', sans-serif;
  font-weight: 800;
  font-size: clamp(2.4rem, 3.2vw, 41rem);
  line-height: 1.03; letter-spacing: .02em;
  text-transform: uppercase; color: #fff;
  text-shadow: 0 2px 20px rgba(0,0,0,.3);
  max-width: 600px; margin-bottom: 1.25rem;
}
.hero-divider { width: 4rem; height: 4px; background: var(--blue); margin-bottom: 1.5rem; }
.hero-sub {
  font-size: 1.0625rem; color: rgba(255,255,255,.78);
  font-weight: 300; line-height: 1.7; margin-bottom: .5rem;
}
.hero-btns { display: flex; flex-wrap: wrap; gap: 1.25rem; margin-top: 2rem; }
/* Feature icons */
.hero-features {
  display: flex; flex-wrap: wrap; gap: 2rem;
  margin-top: 3.5rem; position: relative; z-index: 2;
}
.hero-feature { display: flex; flex-direction: column; align-items: center; gap: .5rem; }
.hero-feature-icon {
  width: 48px; height: 48px; border-radius: 50%;
  border: 2px solid rgba(26,95,180,.7);
  background: rgba(26,95,180,.15);
  display: flex; align-items: center; justify-content: center;
}
.hero-feature-icon svg { width: 20px; height: 20px; color: #fff; stroke: #fff; }
.hero-feature-label {
  font-family: 'Barlow Condensed', sans-serif;
  font-weight: 700; font-size: .875rem;
  letter-spacing: .1em; text-transform: uppercase; color: #fff;
  text-align: center;
}
.hero-feature-sub { font-size: .65rem; color: rgba(255,255,255,.55); text-align: center; }
/* Wave divider */
.hero-wave { position: absolute; bottom: 0; left: 0; right: 0; pointer-events: none; }
.hero-wave svg { display: block; width: 100%; height: 50px; }

/* =============================================
   PRODUCT SERIES
   ============================================= */
#products { padding: 5rem 0; background: #fff; }
.products-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.5rem;
}
.product-card {
  border: 1px solid var(--gray-200);
  transition: var(--transition);
  display: flex; flex-direction: column;
}
.product-card:hover {
  box-shadow: var(--shadow-md);
  transform: translateY(-6px);
  border-color: rgba(26,95,180,.25);
}
.product-img {
  position: relative; height: 300px;
  background: linear-gradient(135deg, #f8f9fc 0%, #eef1f8 100%);
  overflow: hidden;
}
.product-img img {
  width: 100%; height: 100%; object-fit: contain;
  padding: 1rem;
  transition: transform .5s cubic-bezier(.4,0,.2,1);
}
.product-card:hover .product-img img { transform: scale(1.06); }
.product-tag {
  position: absolute; top: .75rem; right: .75rem;
  background: var(--blue); color: #fff;
  font-family: 'Barlow', sans-serif; font-weight: 700;
  font-size: .65rem; letter-spacing: .1em; text-transform: uppercase;
  padding: .25rem .625rem;
}
.product-body { padding: 1.25rem; flex: 1; display: flex; flex-direction: column; }
.product-name {
  font-family: 'Barlow', sans-serif; font-weight: 700;
  font-size: 1.25rem; color: var(--gray-800);
  margin-bottom: .5rem; line-height: 1.35;
  transition: color .2s;
}
.product-card:hover .product-name { color: var(--blue); }
.product-desc { font-size: 1rem; color: var(--gray-400); line-height: 1.65; margin-bottom: 1.25rem; }
.product-specs { display: flex; flex-wrap: wrap; gap: .375rem; margin-bottom: 1rem; }
.product-spec {
  font-size: .875rem; color: var(--gray-400);
  background: var(--gray-100); border: 1px solid var(--gray-200);
  padding: .2rem .5rem;
}
.product-link {
  margin-top: auto; padding-top: 1.25rem;
  border-top: 1px solid var(--gray-100);
  font-family: 'Barlow', sans-serif; font-weight: 700;
  font-size: .875rem; letter-spacing: .1em; text-transform: uppercase;
  color: var(--blue); display: flex; align-items: center; gap: .375rem;
  transition: color .2s;
}
.product-link:hover { color: var(--blue-dark); }
.product-link svg { width: 14px; height: 14px; }

/* =============================================
   WORKING PRINCIPLE
   ============================================= */
#principle { display: grid; grid-template-columns: 1fr 1fr; }
.principle-left {
  background: var(--blue-deep);
  padding: 4rem 3rem;
  display: flex; flex-direction: column; justify-content: center;
}
.principle-accent { width: 2.5rem; height: 2px; background: var(--blue); margin-bottom: 1.5rem; }
.principle-title {
  font-family: 'Barlow Condensed', sans-serif;
  font-weight: 800; font-size: 2.5rem;
  color: #fff; text-transform: uppercase;
  line-height: 1.1; letter-spacing: .03em; margin-bottom: 1.5rem;
}
.principle-desc { font-size: 1rem; color: rgba(255,255,255,.6); line-height: 1.75; margin-bottom: 2rem; }
.principle-feature { display: flex; gap: 1rem; margin-bottom: 1.5rem; }
.principle-icon {
  width: 40px; height: 40px; flex-shrink: 0;
  border: 1px solid rgba(26,95,180,.4);
  background: rgba(26,95,180,.12);
  display: flex; align-items: center; justify-content: center;
}
.principle-icon svg { width: 16px; height: 16px; stroke: rgba(180,210,255,.9); }
.principle-feat-title {
  font-family: 'Barlow', sans-serif; font-weight: 700;
  font-size: .875rem; letter-spacing: .12em; text-transform: uppercase;
  color: #fff; margin-bottom: .375rem;
}
.principle-feat-desc { font-size: .75rem; color: rgba(255,255,255,.5); line-height: 1.6; }
.principle-center {
  background: var(--gray-100);
  display: flex; align-items: center; justify-content: center;
  padding: 1.5rem;
}
.principle-center img { width: 100%; height: 100%; object-fit: contain; max-height: 520px; }
.principle-right {
  background: #fff; padding: 3rem 2.5rem;
  display: flex; flex-direction: column; justify-content: center;
}
.principle-right-title {
  font-family: 'Barlow Condensed', sans-serif;
  font-weight: 700; font-size: 1.25rem;
  text-transform: uppercase; letter-spacing: .08em;
  color: var(--gray-800); margin-bottom: .5rem;
}
.principle-right-line { width: 2.5rem; height: 2px; background: var(--blue); margin-bottom: 1.5rem; }
.principle-img-wrap {
  background: linear-gradient(135deg, #f5f7fc, #e8eef8);
  padding: 1rem; margin-bottom: 1.5rem;
}
.principle-img-wrap img { width: 100%; }
.principle-points { display: flex; flex-direction: column; gap: .75rem; }
.principle-point { display: flex; align-items: flex-start; gap: .625rem; }
.principle-dot {
  width: 6px; height: 6px; border-radius: 50%;
  background: var(--blue); flex-shrink: 0; margin-top: .4rem;
}
.principle-point span { font-size: 1rem; color: var(--gray-600); line-height: 1.6; }

/* =============================================
   ADVANTAGES
   ============================================= */
#advantages { padding: 5rem 0; background: var(--gray-100); }
.advantages-grid {
  display: grid;
  grid-template-columns: repeat(7, 1fr);
  gap: 1rem;
}
.advantage-item {
  background: #fff; padding: 1.5rem 1rem;
  text-align: center;
  border: 1px solid var(--gray-200);
  transition: var(--transition);
}
.advantage-item:hover { box-shadow: var(--shadow-md); border-color: rgba(26,95,180,.2); }
.advantage-icon {
  width: 52px; height: 52px; border-radius: 50%;
  border: 2px solid rgba(26,95,180,.4);
  background: rgba(26,95,180,.05);
  display: flex; align-items: center; justify-content: center;
  margin: 0 auto 1.25rem;
  transition: var(--transition);
}
.advantage-icon svg { width: 20px; height: 20px; stroke: var(--blue); }
.advantage-item:hover .advantage-icon { background: var(--blue); border-color: var(--blue); }
.advantage-item:hover .advantage-icon svg { stroke: #fff; }
.advantage-name {
  font-family: 'Barlow', sans-serif; font-weight: 700;
  font-size: 1.125rem; letter-spacing: .1em; text-transform: uppercase;
  color: var(--gray-800); margin-bottom: .5rem; line-height: 1.3;
}
.advantage-desc { font-size: .75rem; color: var(--gray-400); line-height: 1.6; }

/* =============================================
   MANUFACTURING
   ============================================= */
#manufacturing { padding: 5rem 0; background: #fff; }
.mfg-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 4rem; align-items: start; }
.mfg-subtitle {
  font-family: 'Barlow Condensed', sans-serif;
  font-weight: 700; font-size: 1.5rem;
  text-transform: uppercase; letter-spacing: .06em;
  color: var(--gray-800); margin-bottom: .5rem;
}
.mfg-line { width: 2.5rem; height: 2px; background: var(--blue); margin-bottom: 1.5rem; }
.mfg-photos { display: grid; grid-template-columns: repeat(3, 1fr); gap: .75rem; margin-bottom: 1.5rem; }
.mfg-photo { overflow: hidden; aspect-ratio: 4/3; }
.mfg-photo img { width: 100%; height: 100%; object-fit: cover; transition: transform .5s; }
.mfg-photo:hover img { transform: scale(1.08); }
.mfg-stats { display: grid; grid-template-columns: repeat(4, 1fr); gap: 1rem; }
.mfg-stat { text-align: center; }
.mfg-stat-icon {
  width: 40px; height: 40px; border-radius: 50%;
  border: 1px solid rgba(26,95,180,.3);
  background: rgba(26,95,180,.06);
  display: flex; align-items: center; justify-content: center;
  margin: 0 auto .5rem;
}
.mfg-stat-icon svg { width: 16px; height: 16px; stroke: var(--blue); }
.mfg-stat-num {
  font-family: 'Barlow Condensed', sans-serif;
  font-weight: 800; font-size: 1.5rem; color: var(--blue); line-height: 1;
}
.mfg-stat-label { font-size: .875rem; color: var(--gray-400); margin-top: .25rem; line-height: 1.4; }
/* Certs */
.cert-desc { font-size: 1rem; color: var(--gray-600); line-height: 1.7; margin-top: 1rem; }
.cert-images { display: grid; grid-template-columns: repeat(1, 1fr); gap: .75rem; margin-bottom: 1rem; }
.cert-img { overflow: hidden; border: 1px solid var(--gray-200); }
.cert-img img { width: 100%;
   /* aspect-ratio: 3/4; */
    object-fit: cover; transition: transform .3s; }
.cert-img:hover img { transform: scale(1.06); }

/* =============================================
   STATS BANNER
   ============================================= */
#stats {
  background: var(--blue-deep);
  padding: 3rem 0;
}
.stats-grid {
  display: grid; grid-template-columns: repeat(5, 1fr);
  gap: 0;
}
.stat-item {
  text-align: center; padding: 1rem 1.5rem;
  border-right: 1px solid rgba(255,255,255,.08);
}
.stat-item:last-child { border-right: none; }
.stat-num {
  font-family: 'Barlow Condensed', sans-serif;
  font-weight: 800; font-size: 2.5rem;
  color: #fff; line-height: 1; margin-bottom: .5rem;
}
.stat-label {
  font-family: 'Barlow', sans-serif;
  font-size: .875rem; letter-spacing: .12em;
  text-transform: uppercase; color: rgba(255,255,255,.45);
  line-height: 1.5;
}

/* =============================================
   ABOUT
   ============================================= */
#about { padding: 5rem 0; background: #fff; }
.about-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 5rem; align-items: center; }
.about-badge { display: flex; align-items: center; gap: .75rem; margin-bottom: 1rem; }
.about-badge-line { width: 2.5rem; height: 2px; background: var(--blue); }
.about-badge-text {
  font-family: 'Barlow', sans-serif; font-weight: 700;
  font-size: .875rem; letter-spacing: .2em; text-transform: uppercase; color: var(--blue);
}
.about-title {
  font-family: 'Barlow Condensed', sans-serif;
  font-weight: 800; font-size: 2.25rem;
  text-transform: uppercase; letter-spacing: .04em;
  color: var(--gray-800); line-height: 1.1; margin-bottom: .5rem;
}
.about-line { width: 2.5rem; height: 2px; background: var(--blue); margin-bottom: 1.5rem; }
.about-text { font-size: .9rem; color: var(--gray-600); line-height: 1.8; margin-bottom: 1rem; }
.about-stats { display: grid; grid-template-columns: 1fr 1fr; gap: 1.25rem; margin: 1.5rem 0 2rem; }
.about-stat { display: flex; align-items: flex-start; gap: 1.25rem; }
.about-stat-icon {
  width: 40px; height: 40px; flex-shrink: 0;
  border: 1px solid rgba(26,95,180,.25);
  background: rgba(26,95,180,.06);
  display: flex; align-items: center; justify-content: center;
}
.about-stat-icon svg { width: 16px; height: 16px; stroke: var(--blue); }
.about-stat-num {
  font-family: 'Barlow Condensed', sans-serif;
  font-weight: 800; font-size: 1.75rem; color: var(--blue); line-height: 1;
}
.about-stat-label { font-size: .75rem; color: var(--gray-400); margin-top: .2rem; line-height: 1.4; }
.about-btns { display: flex; align-items: center; gap: 1.25rem; }
.about-link {
  font-family: 'Barlow', sans-serif; font-weight: 700;
  font-size: 1rem; letter-spacing: .06em; color: var(--blue);
  transition: color .2s;
}
.about-link:hover { color: var(--blue-dark); }
/* About image */
.about-img-wrap { position: relative; }
.about-img { overflow: hidden; box-shadow: var(--shadow-lg); }
.about-img img { width: 100%; object-fit: cover; max-height: 520px; transition: transform .7s; }
.about-img:hover img { transform: scale(1.04); }
.about-badge-box {
  position: absolute; bottom: -1.25rem; left: -1.25rem;
  background: var(--blue); padding: 1.25rem 1.5rem;
  box-shadow: var(--shadow-md);
}
.about-badge-num {
  font-family: 'Barlow Condensed', sans-serif;
  font-weight: 800; font-size: 2.5rem; color: #fff; line-height: 1;
}
.about-badge-label {
  font-family: 'Barlow', sans-serif; font-size: .875rem;
  color: rgba(255,255,255,.75); letter-spacing: .12em;
  text-transform: uppercase; margin-top: .25rem;
}
.about-cert-box {
  position: absolute; top: -1.25rem; right: -1.25rem;
  background: var(--blue-deep); padding: 1rem 1.25rem;
  box-shadow: var(--shadow-md);
}
.about-cert-box svg { width: 24px; height: 24px; stroke: rgba(180,210,255,.8); margin-bottom: .5rem; }
.about-cert-label {
  font-family: 'Barlow', sans-serif; font-weight: 700;
  font-size: .65rem; letter-spacing: .12em; text-transform: uppercase; color: #fff;
}

/* =============================================
   APPLICATIONS
   ============================================= */
#applications { padding: 5rem 0; background: #fff; }
.app-grid {
  display: grid;
  grid-template-columns: repeat(6, 1fr);
  gap: 1.25rem;
}
.app-card {
  position: relative; overflow: hidden;
  aspect-ratio: 3/4; cursor: pointer;
}
.app-card img { width: 100%; height: 100%; object-fit: cover; transition: transform .5s cubic-bezier(.4,0,.2,1); }
.app-card:hover img { transform: scale(1.08); }
.app-card::after {
  content: '';
  position: absolute; inset: 0;
  background: linear-gradient(to bottom, rgba(13,31,60,.3) 0%, rgba(13,31,60,.72) 100%);
  transition: background .3s;
}
.app-card:hover::after {
  background: linear-gradient(to bottom, rgba(26,95,180,.4) 0%, rgba(13,31,60,.88) 100%);
}
.app-card-content {
  position: absolute; bottom: 0; left: 0; right: 0;
  z-index: 2; padding: 1rem .75rem;
  display: flex; flex-direction: column; align-items: center; gap: .5rem;
}
.app-icon {
  width: 36px; height: 36px; border-radius: 50%;
  border: 2px solid rgba(255,255,255,.55);
  background: rgba(26,95,180,.45);
  display: flex; align-items: center; justify-content: center;
}
.app-icon svg { width: 15px; height: 15px; stroke: #fff; }
.app-label {
  font-family: 'Barlow', sans-serif; font-weight: 700;
  font-size: .875rem; letter-spacing: .08em; text-transform: uppercase;
  color: #fff; text-align: center; line-height: 1.3;
}

/* =============================================
   CONTACT
   ============================================= */
#contact { padding: 5rem 0; background: var(--gray-100); }
.contact-grid { display: grid; grid-template-columns: 1fr 1.5fr; gap: 4rem; }
.contact-info-title {
  font-family: 'Barlow Condensed', sans-serif;
  font-weight: 700; font-size: 1.75rem;
  text-transform: uppercase; letter-spacing: .06em;
  color: var(--gray-800); margin-bottom: .5rem;
}
.contact-info-line { width: 2.5rem; height: 2px; background: var(--blue); margin-bottom: 1.5rem; }
.contact-info-desc { font-size: 1.25rem; color: var(--gray-600); line-height: 1.75; margin-bottom: 2rem; }
.contact-items { display: flex; flex-direction: column; gap: 1.25rem; }
.contact-item { display: flex; align-items: flex-start; gap: 1.25rem; }
.contact-item-icon {
  width: 36px; height: 36px; flex-shrink: 0;
  background: var(--blue); border-radius: 50%;
  display: flex; align-items: center; justify-content: center;
}
.contact-item-icon svg { width: 15px; height: 15px; stroke: #fff; }
.contact-item-label { font-size: .875rem; color: var(--gray-400); text-transform: uppercase; letter-spacing: .08em; margin-bottom: .2rem; }
.contact-item-value { font-size: 1rem; color: var(--gray-800); font-weight: 600; }
/* Form */
.contact-form-title {
  font-family: 'Barlow Condensed', sans-serif;
  font-weight: 700; font-size: 1.5rem;
  text-transform: uppercase; letter-spacing: .06em;
  color: var(--gray-800); margin-bottom: .5rem;
}
.contact-form-line { width: 2.5rem; height: 2px; background: var(--blue); margin-bottom: 1.5rem; }
.form-row { display: grid; grid-template-columns: 1fr 1fr; gap: 1rem; margin-bottom: 1rem; }
.form-group { display: flex; flex-direction: column; gap: .375rem; margin-bottom: 1rem; }
.form-group label { font-size: .75rem; font-weight: 600; color: var(--gray-600); letter-spacing: .06em; text-transform: uppercase; }
.form-group input,
.form-group select,
.form-group textarea {
  padding: .75rem 1rem;
  border: 1px solid var(--gray-200);
  background: #fff; font-family: 'Source Sans 3', sans-serif;
  font-size: .9rem; color: var(--gray-800);
  transition: border-color .2s, box-shadow .2s;
  outline: none;
  border-radius: var(--radius);
}
.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
  border-color: var(--blue);
  box-shadow: 0 0 0 3px rgba(26,95,180,.1);
}
.form-group textarea { resize: vertical; min-height: 110px; }
.form-submit { width: 100%; padding: 1.25rem; font-size: 1.25rem; }

/* =============================================
   FOOTER
   ============================================= */
#footer {
  background: var(--blue-deep);
  padding: 4rem 0 0;
}
.footer-grid { display: grid; grid-template-columns: 1.4fr 1fr 1fr 1fr 1.3fr; gap: 2.5rem; padding-bottom: 3rem; }
.footer-logo-main {
  font-family: 'Barlow Condensed', sans-serif;
  font-weight: 800; font-size: 1.75rem;
  color: #fff; letter-spacing: .05em; line-height: 1;
}
.footer-logo-sub {
  font-family: 'Barlow', sans-serif; font-size: .6rem;
  color: rgba(255,255,255,.45); letter-spacing: .18em;
  text-transform: uppercase; margin-bottom: 1rem;
}
.footer-about { font-size: 0.875rem; color: rgba(255,255,255,.5); line-height: 1.75; margin-bottom: 1.5rem; }
.footer-socials { display: flex; gap: .625rem; }
.footer-social {
  width: 32px; height: 32px; border-radius: 50%;
  border: 1px solid rgba(255,255,255,.2);
  display: flex; align-items: center; justify-content: center;
  transition: var(--transition);
}
.footer-social:hover { background: var(--blue); border-color: var(--blue); }
.footer-social svg { width: 14px; height: 14px; stroke: rgba(255,255,255,.7); }
.footer-col-title {
  font-family: 'Barlow', sans-serif; font-weight: 700;
  font-size: 1.25rem;
   /* letter-spacing: .12em;  */
   text-transform: uppercase;
  color: #fff; margin-bottom: 1.25rem;
}
.footer-links { display: flex; flex-direction: column; gap: .625rem; }
.footer-links a {
  font-size: 0.875rem; color: rgba(255,255,255,.5);
  transition: color .2s;
}
.footer-links a:hover { color: rgba(255,255,255,.9); }
.footer-contact-items { display: flex; flex-direction: column; gap: 1.25rem; }
.footer-contact-item { display: flex; align-items: flex-start; gap: .625rem; }
.footer-contact-item svg { width: 14px; height: 14px; stroke: rgba(26,95,180,.9); flex-shrink: 0; margin-top: .2rem; }
.footer-contact-item span { font-size: 1rem; color: rgba(255,255,255,.5); line-height: 1.5; }
.footer-bottom {
  border-top: 1px solid rgba(255,255,255,.06);
  padding: 1.25rem 0; text-align: center;
}
.footer-bottom p { font-size: .75rem; color: rgba(255,255,255,.3); }

/* =============================================
   WHATSAPP FLOAT
   ============================================= */
.whatsapp-float {
  position: fixed; bottom: 2rem; right: 2rem; z-index: 999;
  display: flex; align-items: center; gap: .5rem;
  background: #25D366; color: #fff;
  padding: .75rem 1.25rem; border-radius: 50px;
  font-family: 'Barlow', sans-serif; font-weight: 700; font-size: .8125rem;
  box-shadow: 0 4px 20px rgba(37,211,102,.4);
  transition: var(--transition);
}
.whatsapp-float:hover { transform: translateY(-3px); box-shadow: 0 8px 28px rgba(37,211,102,.5); }
.whatsapp-float svg { width: 20px; height: 20px; }

/* =============================================
   RESPONSIVE
   ============================================= */
@media (max-width: 1100px) {
  .products-grid { grid-template-columns: repeat(2, 1fr); }
  .advantages-grid { grid-template-columns: repeat(4, 1fr); }
  .footer-grid { grid-template-columns: 1fr 1fr; gap: 2rem; }
  #principle { grid-template-columns: 1fr 1fr; }
  .principle-right { display: none; }
  .stats-grid { grid-template-columns: repeat(3, 1fr); }
}
@media (max-width: 900px) {
  .mfg-grid { grid-template-columns: 1fr; gap: 2.5rem; }
  .about-grid { grid-template-columns: 1fr; gap: 2.5rem; }
  .contact-grid { grid-template-columns: 1fr; gap: 2rem; }
  .app-grid { grid-template-columns: repeat(3, 1fr); }
  #principle { grid-template-columns: 1fr; }
  .principle-center { min-height: 300px; }
}
@media (max-width: 768px) {
  .nav-links, .nav-right { display: none; }
  .nav-toggle { display: flex; }
  .products-grid { grid-template-columns: 1fr 1fr; gap: 1rem; }
  .advantages-grid { grid-template-columns: repeat(2, 1fr); }
  .app-grid { grid-template-columns: repeat(2, 1fr); }
  .mfg-photos { grid-template-columns: 1fr 1fr; }
  .mfg-stats { grid-template-columns: repeat(2, 1fr); }
  .cert-images { grid-template-columns: repeat(3, 1fr); }
  .form-row { grid-template-columns: 1fr; }
  .footer-grid { grid-template-columns: 1fr 1fr; }
  .stats-grid { grid-template-columns: repeat(2, 1fr); }
  .hero-features { gap: 1.25rem; }
  .about-badge-box, .about-cert-box { display: none; }
}
@media (max-width: 480px) {
  .products-grid { grid-template-columns: 1fr; }
  .app-grid { grid-template-columns: repeat(2, 1fr); }
  .footer-grid { grid-template-columns: 1fr; }
  .stats-grid { grid-template-columns: repeat(2, 1fr); }
  .whatsapp-float span { display: none; }
  .whatsapp-float { padding: 1.25rem; border-radius: 50%; }
}