/* ==========================================================================
   ZC Electric Equipment Co., Ltd. - Main Stylesheet
   Pure Vanilla CSS using CSS Grid (No Tailwind CSS)
   ========================================================================== */

:root {
  /* Colors */
  --color-primary-blue: #0066cc;
  --color-primary-hover: #0052a3;
  --color-accent-green: #76c043;
  --color-accent-green-hover: #86d44e;
  --color-accent-green-glow: rgba(118, 192, 67, 0.45);
  
  /* Dark Navy Palette */
  --color-navy-dark: #071426;
  --color-navy-deep: #050d18;
  --color-navy-card: #0c1e33;
  --color-navy-card-hover: #10263f;
  --color-navy-subtle: #0f233a;

  /* Neutrals & Tints */
  --color-white: #ffffff;
  --color-offwhite: #f8fafc;
  --color-light-bg: #f3f6fa;
  --color-contact-bg: #edf4fb;
  --color-border-light: #e2e8f0;
  --color-border-subtle: rgba(226, 232, 240, 0.8);
  --color-text-dark: #0c1e33;
  --color-text-body: #475569;
  --color-text-muted: #8492a6;
  --color-text-light: #cbd5e1;

  /* Typography */
  --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  --font-display: 'Outfit', 'Inter', -apple-system, sans-serif;
  --font-handwriting: 'Caveat', cursive, sans-serif;

  /* Shadows */
  --shadow-sm: 0 2px 8px rgba(12, 30, 51, 0.04);
  --shadow-md: 0 6px 20px rgba(12, 30, 51, 0.08);
  --shadow-lg: 0 12px 32px rgba(12, 30, 51, 0.12);
  --shadow-card: 0 10px 30px rgba(0, 0, 0, 0.25);

  /* Layout Widths */
  --max-width: 1320px;
  --container-padding: 24px;
  --main-nav-height: 74px;
  --subnav-height: 58px;
}

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

html {
  scroll-behavior: smooth;
  scroll-padding-top: calc(var(--main-nav-height, 74px) + var(--subnav-height, 58px) + 20px);
  font-size: 16px;
}

body {
  font-family: var(--font-sans);
  background-color: var(--color-white);
  color: var(--color-text-body);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  overflow-x: hidden;
}

img {
  max-width: 100%;
  height: auto;
  display: block;
}

a {
  color: inherit;
  text-decoration: none;
  transition: all 0.25s ease;
}

button, input, select, textarea {
  font-family: inherit;
  font-size: inherit;
  border: none;
  outline: none;
}

.visually-hidden {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  border: 0;
}

/* ==========================================================================
   Reusable Components (Buttons, Badges, Typography, Grid Containers)
   ========================================================================== */

.icon-svg {
  width: 20px;
  height: 20px;
  display: inline-block;
  vertical-align: middle;
  transition: transform 0.25s ease;
}

.btn {
  display: inline-grid;
  grid-auto-flow: column;
  align-items: center;
  gap: 10px;
  padding: 11px 24px;
  font-weight: 600;
  font-size: 0.95rem;
  cursor: pointer;
  transition: all 0.3s cubic-bezier(0.16, 1, 0.3, 1);
  white-space: nowrap;
}

.btn-pill {
  border-radius: 9999px;
}

.btn-primary {
  background-color: var(--color-primary-blue);
  color: var(--color-white);
  box-shadow: 0 4px 14px rgba(0, 102, 204, 0.35);
}

.btn-primary:hover {
  background-color: var(--color-primary-hover);
  transform: translateY(-2px);
  box-shadow: 0 6px 20px rgba(0, 102, 204, 0.45);
}

.btn-primary:hover .icon-arrow {
  transform: translateX(4px);
}

.btn-outline {
  background-color: transparent;
  color: var(--color-white);
  border: 1px solid rgba(255, 255, 255, 0.6);
  backdrop-filter: blur(4px);
}

.btn-outline:hover {
  background-color: rgba(255, 255, 255, 0.15);
  border-color: var(--color-white);
  transform: translateY(-2px);
}

.btn-secondary {
  background-color: var(--color-white);
  color: var(--color-text-dark);
  border: 1px solid var(--color-border-light);
  box-shadow: var(--shadow-sm);
}

.btn-secondary:hover {
  border-color: var(--color-primary-blue);
  color: var(--color-primary-blue);
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
}

.btn-secondary:hover .icon-arrow {
  transform: translateX(4px);
}

.btn-circle-green {
  width: 42px;
  height: 42px;
  border-radius: 50%;
  background-color: var(--color-accent-green);
  display: grid;
  place-items: center;
  transition: all 0.25s ease;
}

.btn-circle-green:hover {
  background-color: var(--color-accent-green-hover);
  transform: scale(1.08) rotate(-45deg);
}

.link-arrow {
  display: inline-grid;
  grid-auto-flow: column;
  align-items: center;
  gap: 8px;
  font-weight: 600;
  font-size: 0.95rem;
}

.link-arrow:hover {
  gap: 12px;
}

.link-arrow:hover .icon-arrow {
  transform: translateX(3px);
}

.link-light {
  color: var(--color-white);
}

.link-light:hover {
  color: var(--color-accent-green);
}

.link-blue {
  color: var(--color-primary-blue);
}

.link-blue:hover {
  color: var(--color-primary-hover);
}

.section-eyebrow {
  display: inline-block;
  font-family: var(--font-display);
  font-size: 0.8rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 2px;
  color: var(--color-primary-blue);
  margin-bottom: 12px;
}

.eyebrow-light {
  color: #38bdf8;
}

.section-heading {
  font-family: var(--font-display);
  font-size: 2.35rem;
  font-weight: 700;
  color: var(--color-text-dark);
  line-height: 1.22;
  letter-spacing: -0.02em;
}

.heading-light {
  color: var(--color-white);
}

.text-green {
  color: var(--color-accent-green);
}

/* ==========================================================================
   1. Top Utility Header Bar (CSS Grid)
   ========================================================================== */

.top-bar {
  background-color: var(--color-navy-dark);
  color: #94a3b8;
  font-size: 0.815rem;
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
}

.top-bar-container {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 8px var(--container-padding);
  display: grid;
  grid-template-columns: 1fr auto;
  align-items: center;
  gap: 20px;
}

.top-bar-tagline {
  display: grid;
  grid-auto-flow: column;
  align-items: center;
  gap: 8px;
  justify-content: start;
}

.icon-leaf {
  color: var(--color-accent-green);
  width: 15px;
  height: 15px;
}

.top-bar-links {
  display: grid;
  grid-auto-flow: column;
  align-items: center;
  gap: 14px;
}

.top-link {
  color: #a0aec0;
}

.top-link:hover {
  color: var(--color-white);
}

.divider {
  color: rgba(255, 255, 255, 0.2);
}

.top-search-btn {
  background: transparent;
  color: #a0aec0;
  cursor: pointer;
  display: grid;
  place-items: center;
  padding: 2px;
}

.top-search-btn:hover {
  color: var(--color-white);
}

.top-search-btn .icon-svg {
  width: 15px;
  height: 15px;
}

.lang-selector {
  display: grid;
  grid-auto-flow: column;
  align-items: center;
  gap: 6px;
  cursor: pointer;
  color: #cbd5e1;
}

.lang-selector:hover {
  color: var(--color-white);
}

.icon-globe {
  width: 14px;
  height: 14px;
}

.icon-chevron {
  width: 12px;
  height: 12px;
}

/* ==========================================================================
   2. Main Navigation Header (CSS Grid)
   ========================================================================== */

.main-nav {
  position: sticky;
  top: 0;
  z-index: 100;
  background-color: var(--color-white);
  box-shadow: 0 2px 12px rgba(12, 30, 51, 0.05);
  transition: all 0.3s ease;
}

.nav-container {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 16px var(--container-padding);
  display: grid;
  grid-template-columns: auto 1fr auto;
  align-items: center;
  gap: 36px;
}

.brand-logo {
  display: grid;
  grid-auto-flow: column;
  align-items: center;
  gap: 14px;
  text-decoration: none;
}

.logo-symbol {
  width: 44px;
  height: 33px;
}

.brand-text {
  display: grid;
  grid-template-rows: auto auto;
}

.brand-cn {
  font-family: var(--font-display);
  font-size: 1.25rem;
  font-weight: 800;
  color: var(--color-text-dark);
  line-height: 1.1;
  letter-spacing: 0.05em;
}

.brand-en {
  font-family: var(--font-display);
  font-size: 0.65rem;
  font-weight: 700;
  letter-spacing: 0.18em;
  color: var(--color-primary-blue);
}

@media (min-width: 992px) {
  .nav-menu {
    display: grid;
    grid-auto-flow: column;
    justify-content: center;
    gap: 32px;
    list-style: none;
  }
}

.nav-link {
  font-weight: 500;
  font-size: 0.95rem;
  color: var(--color-text-dark);
  position: relative;
  padding: 8px 0;
}

.nav-link:hover {
  color: var(--color-primary-blue);
}

.nav-item.active .nav-link {
  color: var(--color-primary-blue);
  font-weight: 600;
}

.nav-item.active .nav-link::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 100%;
  height: 2.5px;
  background-color: var(--color-accent-green);
  border-radius: 2px;
}

/* ==========================================================================
   Navigation Submenu Systems (Dropdown & Mega Menu)
   ========================================================================== */
.nav-item {
  position: relative;
}

.nav-item-header {
  display: inline-flex;
  align-items: center;
}

.nav-item.has-megamenu {
  position: static;
}

.nav-link {
  display: inline-flex;
  align-items: center;
  gap: 5px;
}

.icon-nav-caret {
  width: 13px;
  height: 13px;
  stroke: currentColor;
  transition: transform 0.25s cubic-bezier(0.16, 1, 0.3, 1), color 0.2s ease;
  pointer-events: none;
}

.mobile-sub-toggle {
  display: none;
}

/* Desktop Navigation Hover & Dropdown System */
@media (min-width: 992px) {
  .has-dropdown:hover .icon-nav-caret,
  .has-dropdown:focus-within .icon-nav-caret,
  .has-megamenu:hover .icon-nav-caret,
  .has-megamenu:focus-within .icon-nav-caret {
    transform: rotate(180deg);
    color: var(--color-primary-blue);
  }

  /* 1. Dropdown Menu (About Us) - Desktop Floating */
  .nav-dropdown {
    position: absolute;
    top: calc(100% + 4px);
    left: 50%;
    transform: translateX(-50%) translateY(8px);
    width: 360px;
    background-color: var(--color-white);
    border-radius: 14px;
    border: 1px solid var(--color-border-light);
    box-shadow: 0 18px 42px rgba(12, 30, 51, 0.12), 0 4px 12px rgba(12, 30, 51, 0.04);
    padding: 10px;
    opacity: 0;
    visibility: hidden;
    pointer-events: none;
    transition: opacity 0.22s ease, transform 0.22s cubic-bezier(0.16, 1, 0.3, 1), visibility 0.22s ease;
    z-index: 150;
  }

  /* Hover bridge so moving cursor down keeps dropdown open */
  .nav-dropdown::before {
    content: '';
    position: absolute;
    top: -18px;
    left: 0;
    right: 0;
    height: 18px;
  }

  .has-dropdown:hover .nav-dropdown,
  .has-dropdown:focus-within .nav-dropdown {
    opacity: 1;
    visibility: visible;
    pointer-events: auto;
    transform: translateX(-50%) translateY(0);
  }
}

.dropdown-list {
  display: grid;
  gap: 4px;
}

.dropdown-item {
  display: grid;
  grid-template-columns: 38px 1fr auto;
  align-items: center;
  gap: 14px;
  padding: 10px 12px;
  border-radius: 10px;
  text-decoration: none;
  transition: background-color 0.2s ease, transform 0.2s ease;
}

.dropdown-item:hover {
  background-color: #f1f7fe;
  transform: translateX(3px);
}

.dropdown-icon-box {
  width: 38px;
  height: 38px;
  border-radius: 10px;
  background: #e8f2fc;
  color: var(--color-primary-blue);
  display: grid;
  place-items: center;
  flex-shrink: 0;
  transition: background-color 0.2s ease, color 0.2s ease, transform 0.2s ease;
}

.dropdown-icon-box svg {
  width: 19px;
  height: 19px;
}

.dropdown-item:hover .dropdown-icon-box {
  background-color: var(--color-primary-blue);
  color: var(--color-white);
  transform: scale(1.05);
}

.dropdown-info {
  display: grid;
  gap: 2px;
}

.dropdown-title {
  display: block;
  font-family: var(--font-display);
  font-size: 0.92rem;
  font-weight: 700;
  color: var(--color-navy-dark);
  line-height: 1.25;
  transition: color 0.2s ease;
}

.dropdown-item:hover .dropdown-title {
  color: var(--color-primary-blue);
}

.dropdown-desc {
  display: block;
  font-size: 0.77rem;
  color: var(--color-text-muted);
  line-height: 1.35;
}

.dropdown-arrow {
  width: 14px;
  height: 14px;
  color: var(--color-text-muted);
  opacity: 0;
  transform: translateX(-4px);
  transition: all 0.2s ease;
}

.dropdown-item:hover .dropdown-arrow {
  opacity: 1;
  transform: translateX(0);
  color: var(--color-primary-blue);
}

/* 2. Mega Menu (Products) - Desktop Floating */
@media (min-width: 992px) {
  .nav-megamenu {
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    width: 100%;
    background-color: var(--color-white);
    border-top: 1px solid var(--color-border-light);
    border-bottom: 2px solid var(--color-border-subtle);
    box-shadow: 0 24px 48px rgba(12, 30, 51, 0.12);
    opacity: 0;
    visibility: hidden;
    pointer-events: none;
    transform: translateY(10px);
    transition: opacity 0.25s ease, transform 0.25s cubic-bezier(0.16, 1, 0.3, 1), visibility 0.25s ease;
    z-index: 140;
  }

  /* Hover bridge for Mega Menu */
  .nav-megamenu::before {
    content: '';
    position: absolute;
    top: -18px;
    left: 0;
    right: 0;
    height: 18px;
  }

  .has-megamenu:hover .nav-megamenu,
  .has-megamenu:focus-within .nav-megamenu {
    opacity: 1;
    visibility: visible;
    pointer-events: auto;
    transform: translateY(0);
  }
}

.megamenu-container {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 30px var(--container-padding);
}

.megamenu-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr) 280px;
  gap: 24px;
  align-items: stretch;
}

.megamenu-col {
  display: grid;
  grid-template-rows: auto 1fr auto;
  gap: 16px;
  padding: 20px 18px;
  border-radius: 12px;
  background-color: #fafbfc;
  border: 1px solid var(--color-border-light);
  transition: transform 0.22s ease, border-color 0.22s ease, box-shadow 0.22s ease, background-color 0.22s ease;
}

.megamenu-col:hover {
  background-color: var(--color-white);
  border-color: #bfdbfe;
  box-shadow: 0 8px 24px rgba(0, 102, 204, 0.08);
  transform: translateY(-3px);
}

.megamenu-col-header {
  display: grid;
  grid-template-columns: auto 1fr;
  align-items: center;
  gap: 12px;
  text-decoration: none;
}

.megamenu-icon-badge {
  width: 40px;
  height: 40px;
  border-radius: 10px;
  background-color: #e0f2fe;
  color: var(--color-primary-blue);
  display: grid;
  place-items: center;
  transition: background-color 0.2s ease, color 0.2s ease, transform 0.2s ease;
}

.megamenu-icon-badge svg {
  width: 20px;
  height: 20px;
}

.megamenu-col:hover .megamenu-icon-badge {
  background-color: var(--color-primary-blue);
  color: var(--color-white);
  transform: scale(1.06);
}

.megamenu-col-title {
  display: block;
  font-family: var(--font-display);
  font-size: 1.05rem;
  font-weight: 700;
  color: var(--color-navy-dark);
  line-height: 1.2;
}

.megamenu-col:hover .megamenu-col-title {
  color: var(--color-primary-blue);
}

.megamenu-col-sub {
  display: block;
  font-size: 0.72rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--color-accent-green);
  margin-top: 3px;
}

.megamenu-sublinks {
  list-style: none;
  display: grid;
  gap: 6px;
  align-content: start;
}

.megamenu-sublinks a {
  font-size: 0.85rem;
  color: var(--color-text-body);
  display: block;
  padding: 5px 8px;
  border-radius: 6px;
  text-decoration: none;
  transition: all 0.2s ease;
}

.megamenu-sublinks a:hover {
  color: var(--color-primary-blue);
  background-color: #f1f7fe;
  padding-left: 12px;
}

.megamenu-view-link {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 0.82rem;
  font-weight: 700;
  color: var(--color-primary-blue);
  text-decoration: none;
  transition: gap 0.2s ease, color 0.2s ease;
}

.megamenu-view-link svg {
  width: 14px;
  height: 14px;
  transition: transform 0.2s ease;
}

.megamenu-view-link:hover {
  gap: 10px;
  color: var(--color-primary-hover);
}

.megamenu-view-link:hover svg {
  transform: translateX(3px);
}

/* Mega Menu Featured Card */
.megamenu-featured-card {
  background: linear-gradient(145deg, #071426 0%, #0c1e33 100%);
  color: var(--color-white);
  border: 1px solid rgba(255, 255, 255, 0.12);
  box-shadow: 0 10px 28px rgba(7, 20, 38, 0.25);
  display: flex;
  flex-direction: column;
  justify-content: space-between;
}

.megamenu-featured-card:hover {
  background: linear-gradient(145deg, #091a30 0%, #10263f 100%);
  border-color: rgba(118, 192, 67, 0.35);
  box-shadow: 0 14px 34px rgba(7, 20, 38, 0.35);
}

.megamenu-tag {
  font-size: 0.7rem;
  font-weight: 800;
  letter-spacing: 0.14em;
  color: var(--color-accent-green);
  background: rgba(118, 192, 67, 0.15);
  padding: 4px 10px;
  border-radius: 9999px;
  display: inline-block;
}

.featured-card-title {
  font-family: var(--font-display);
  font-size: 1.15rem;
  font-weight: 800;
  color: var(--color-white);
  line-height: 1.25;
  margin-top: 10px;
}

.featured-card-desc {
  font-size: 0.82rem;
  color: #cbd5e1;
  line-height: 1.45;
  margin-top: 6px;
}

.featured-card-metrics {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 10px;
  padding: 10px;
  border-radius: 8px;
  background: rgba(255, 255, 255, 0.05);
  margin-top: 12px;
  text-align: center;
}

.metric-item strong {
  display: block;
  font-size: 1.05rem;
  font-weight: 800;
  color: var(--color-accent-green);
}

.metric-item span {
  font-size: 0.7rem;
  color: #94a3b8;
}

.featured-btn {
  margin-top: 16px;
  width: 100%;
  justify-content: center;
  font-size: 0.86rem;
  padding: 10px 16px;
}

.nav-actions {
  display: grid;
  grid-auto-flow: column;
  align-items: center;
  gap: 16px;
}

.mobile-drawer-footer {
  display: none;
}

.nav-backdrop {
  display: none;
}

.mobile-toggle {
  display: none;
  background: transparent;
  border: none;
  color: var(--color-text-dark);
  cursor: pointer;
  padding: 8px;
  border-radius: 8px;
  width: 42px;
  height: 42px;
  line-height: 0;
  transition: background-color 0.2s ease, color 0.2s ease;
}

.mobile-toggle:hover {
  background-color: rgba(12, 30, 51, 0.05);
}

.toggle-icon-svg {
  width: 24px;
  height: 24px;
  display: block;
  stroke: var(--color-text-dark);
  transition: transform 0.25s ease;
}

.mobile-toggle .icon-close {
  display: none;
}

.mobile-toggle.is-open .icon-hamburger {
  display: none;
}

.mobile-toggle.is-open .icon-close {
  display: block;
}

/* ==========================================================================
   3. Hero Section with Swiper Slider & Zoom Animation (CSS Grid)
   ========================================================================== */

.hero-section {
  position: relative;
  min-height: 660px;
  background-color: var(--color-navy-dark);
  color: var(--color-white);
  display: grid;
  grid-template-rows: 1fr auto;
  overflow: hidden;
}

.hero-swiper {
  width: 100%;
  min-height: 660px;
  position: relative;
  overflow: hidden;
}

.hero-swiper .swiper-slide {
  position: relative;
  min-height: 660px;
  display: grid;
  align-items: center;
  overflow: hidden;
}

/* Background Image with Zoom (Ken Burns) Animation */
.slide-bg {
  position: absolute;
  inset: 0;
  background-size: cover;
  background-position: center;
  transform: scale(1);
  will-change: transform;
  transition: transform 7s cubic-bezier(0.15, 0.9, 0.2, 1);
  z-index: 0;
}

.swiper-slide-active .slide-bg {
  transform: scale(1.12);
}

.hero-bg-overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(
    90deg, 
    rgba(7, 20, 38, 0.93) 0%, 
    rgba(7, 20, 38, 0.76) 45%, 
    rgba(7, 20, 38, 0.3) 100%
  );
  z-index: 1;
}

.hero-container {
  position: relative;
  z-index: 2;
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 100px var(--container-padding) 90px;
  width: 100%;
  display: grid;
  grid-template-columns: 1.15fr 0.85fr;
  align-items: center;
  gap: 40px;
}

.hero-content {
  display: grid;
  gap: 20px;
}

.hero-eyebrow {
  font-family: var(--font-display);
  font-size: 0.85rem;
  font-weight: 700;
  letter-spacing: 2px;
  color: #94a3b8;
  text-transform: uppercase;
}

.hero-title {
  font-family: var(--font-display);
  font-size: 3.75rem;
  font-weight: 800;
  line-height: 1.08;
  letter-spacing: -0.03em;
  color: var(--color-white);
}

.hero-lead {
  font-size: 1.125rem;
  color: #e2e8f0;
  max-width: 540px;
  line-height: 1.6;
}

.hero-btn-group {
  display: grid;
  grid-auto-flow: column;
  justify-content: start;
  gap: 16px;
  margin-top: 10px;
}

.hero-badge-container {
  display: grid;
  justify-items: end;
  align-self: end;
}

.hero-floating-badge {
  display: grid;
  grid-template-columns: auto 1fr;
  align-items: center;
  gap: 14px;
  background: transparent;
  border: none;
  font-family: var(--font-display);
  font-size: 0.8rem;
  font-weight: 700;
  letter-spacing: 1.5px;
  color: #ffffff;
  text-shadow: 0 2px 10px rgba(0, 0, 0, 0.7);
}

.badge-accent-line {
  width: 3.5px;
  height: 36px;
  background-color: var(--color-accent-green);
  border-radius: 2px;
  box-shadow: 0 0 10px var(--color-accent-green-glow);
}

/* Swiper Navigation Arrows (Glassmorphic) */
.hero-nav-btn {
  position: absolute;
  top: 50%;
  transform: translateY(-50%);
  z-index: 10;
  width: 52px;
  height: 52px;
  border-radius: 50%;
  background: rgba(7, 20, 38, 0.45);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  border: 1px solid rgba(255, 255, 255, 0.22);
  color: var(--color-white);
  display: grid;
  place-items: center;
  cursor: pointer;
  transition: all 0.3s cubic-bezier(0.16, 1, 0.3, 1);
  box-shadow: 0 4px 20px rgba(0, 0, 0, 0.3);
}

.hero-nav-prev {
  left: 28px;
}

.hero-nav-next {
  right: 28px;
}

.hero-nav-btn:hover {
  background-color: var(--color-primary-blue);
  border-color: var(--color-primary-blue);
  transform: translateY(-50%) scale(1.1);
  box-shadow: 0 6px 24px rgba(0, 102, 204, 0.6);
}

.hero-nav-btn:active {
  transform: translateY(-50%) scale(0.96);
}

/* Swiper Controls Panel (Pagination & Counter) */
.hero-controls-panel {
  position: absolute;
  bottom: 24px;
  left: 50%;
  transform: translateX(-50%);
  z-index: 10;
  display: grid;
  grid-auto-flow: column;
  align-items: center;
  gap: 20px;
  background: rgba(7, 20, 38, 0.55);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  border: 1px solid rgba(255, 255, 255, 0.16);
  padding: 8px 20px;
  border-radius: 9999px;
  box-shadow: 0 4px 16px rgba(0, 0, 0, 0.25);
}

.hero-pagination {
  display: grid !important;
  grid-auto-flow: column;
  align-items: center;
  gap: 8px;
  width: auto !important;
  position: static !important;
}

.hero-pagination .swiper-pagination-bullet {
  width: 22px;
  height: 4px;
  border-radius: 2px;
  background: rgba(255, 255, 255, 0.4);
  opacity: 1;
  margin: 0 !important;
  transition: all 0.35s cubic-bezier(0.16, 1, 0.3, 1);
  cursor: pointer;
}

.hero-pagination .swiper-pagination-bullet-active {
  width: 42px;
  background: var(--color-accent-green);
  box-shadow: 0 0 12px var(--color-accent-green-glow);
}

.hero-counter {
  display: grid;
  grid-auto-flow: column;
  align-items: center;
  gap: 4px;
  font-family: var(--font-display);
  font-size: 0.85rem;
  font-weight: 700;
  color: #94a3b8;
  letter-spacing: 1px;
}

.counter-curr {
  color: var(--color-accent-green);
}

.counter-slash {
  color: rgba(255, 255, 255, 0.3);
}

.counter-total {
  color: #cbd5e1;
}

.hero-bottom-ticker {
  position: relative;
  z-index: 2;
  border-top: 1px solid rgba(255, 255, 255, 0.12);
  background: rgba(7, 20, 38, 0.7);
  backdrop-filter: blur(4px);
  padding: 14px var(--container-padding);
}

.ticker-content {
  max-width: var(--max-width);
  margin: 0 auto;
  display: grid;
  grid-auto-flow: column;
  justify-content: start;
  align-items: center;
  gap: 24px;
  font-family: var(--font-display);
  font-size: 0.8rem;
  font-weight: 700;
  letter-spacing: 2px;
  color: #94a3b8;
}

.ticker-sep {
  color: rgba(255, 255, 255, 0.2);
}

/* ==========================================================================
   4. Stats Counter Bar (CSS Grid: 4 Columns)
   ========================================================================== */

.stats-section {
  background-color: var(--color-white);
  border-bottom: 1px solid var(--color-border-light);
  box-shadow: 0 4px 20px rgba(0, 0, 0, 0.03);
}

.stats-container {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 40px var(--container-padding);
  display: grid;
  grid-template-columns: 1fr auto 1fr auto 1fr auto 1.35fr;
  align-items: center;
  gap: 24px;
}

.stat-card {
  display: grid;
  grid-template-rows: auto auto auto;
  gap: 2px;
}

.stat-number {
  font-family: var(--font-display);
  font-size: 2.75rem;
  font-weight: 800;
  color: var(--color-primary-blue);
  line-height: 1;
  letter-spacing: -0.02em;
}

.stat-plus, .stat-unit {
  font-size: 2rem;
  font-weight: 700;
  margin-left: 2px;
}

.stat-title {
  font-family: var(--font-display);
  font-size: 1.15rem;
  font-weight: 700;
  color: var(--color-text-dark);
  margin-top: 4px;
}

.stat-title-bold {
  font-size: 1.2rem;
  font-weight: 800;
}

.stat-subtitle {
  font-size: 0.85rem;
  color: var(--color-text-muted);
}

.stat-divider {
  width: 1px;
  height: 60px;
  background-color: var(--color-border-light);
}

.stat-card-feature {
  display: grid;
  grid-template-columns: auto 1fr;
  grid-template-rows: auto;
  align-items: center;
  gap: 16px;
}

.stat-card-feature .stat-text {
  display: grid;
  gap: 2px;
}

.stat-icon-wrapper {
  margin-bottom: 0;
  display: grid;
  place-items: center;
}

.stat-svg {
  width: 44px;
  height: 44px;
}

/* ==========================================================================
   5. Our Story Section (CSS Grid: Asymmetric Collage)
   ========================================================================== */

.story-section {
  padding: 100px 0;
  background-color: var(--color-white);
}

.story-container {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 var(--container-padding);
  display: grid;
  grid-template-columns: 1.05fr 1.25fr;
  gap: 60px;
  align-items: center;
}

.story-copy {
  display: grid;
  gap: 16px;
}

.story-lead {
  font-size: 1.2rem;
  font-weight: 600;
  color: var(--color-text-dark);
  line-height: 1.4;
}

.story-body {
  font-size: 1rem;
  color: var(--color-text-body);
  line-height: 1.7;
}

.story-cta {
  margin-top: 16px;
}

/* Collage Grid */
.story-grid-collage {
  display: grid;
  grid-template-columns: 1fr 1.25fr;
  grid-template-rows: 250px 200px;
  gap: 20px;
}

.collage-item {
  position: relative;
  overflow: hidden;
  border-radius: 8px;
  box-shadow: var(--shadow-md);
}

.collage-item img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.6s cubic-bezier(0.16, 1, 0.3, 1);
}

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

.collage-welder {
  grid-row: 1 / span 2;
  grid-column: 1;
}

.welder-caption {
  position: absolute;
  bottom: 20px;
  left: 20px;
  right: 20px;
  z-index: 2;
  pointer-events: none;
}

.handwritten-text {
  font-family: var(--font-handwriting);
  font-size: 1.85rem;
  color: var(--color-white);
  line-height: 1.1;
  text-shadow: 0 2px 10px rgba(0, 0, 0, 0.8);
  display: block;
}

.collage-welder::after {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(to top, rgba(0,0,0,0.7) 0%, transparent 60%);
  pointer-events: none;
}

.collage-factory {
  grid-row: 1;
  grid-column: 2;
}

.collage-quote {
  grid-row: 2;
  grid-column: 2;
  background: linear-gradient(135deg, var(--color-navy-card) 0%, #0d2745 100%);
  color: var(--color-white);
  padding: 24px 28px;
  display: grid;
  grid-template-rows: auto 1fr auto;
  gap: 12px;
  border-left: 4px solid var(--color-primary-blue);
}

.quote-icon svg {
  width: 28px;
  height: 28px;
  opacity: 0.9;
}

.quote-text {
  font-family: var(--font-display);
  font-size: 1.15rem;
  font-weight: 600;
  line-height: 1.45;
  color: var(--color-white);
}

.quote-author {
  font-family: var(--font-display);
  font-size: 0.8rem;
  font-weight: 700;
  letter-spacing: 1.5px;
  color: var(--color-accent-green);
}

/* ==========================================================================
   6. Our Products Section (CSS Grid: 3-Column Dark Theme)
   ========================================================================== */

.products-section {
  background-color: var(--color-navy-dark);
  padding: 100px 0;
  color: var(--color-white);
}

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

.section-header {
  display: grid;
  align-items: flex-end;
  margin-bottom: 48px;
  gap: 24px;
}

.products-header {
  grid-template-columns: 1fr auto auto;
}

.header-tagline {
  font-family: var(--font-display);
  font-size: 0.95rem;
  color: #94a3b8;
  font-weight: 500;
}

.products-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 28px;
}

.product-card {
  background-color: var(--color-navy-card);
  border-radius: 8px;
  overflow: hidden;
  display: grid;
  grid-template-rows: 270px auto;
  box-shadow: var(--shadow-card);
  transition: all 0.35s cubic-bezier(0.16, 1, 0.3, 1);
  border: 1px solid rgba(255, 255, 255, 0.06);
}

.product-card:hover {
  transform: translateY(-8px);
  box-shadow: 0 16px 40px rgba(0, 0, 0, 0.45);
  border-color: rgba(118, 192, 67, 0.3);
}

.product-media {
  overflow: hidden;
  position: relative;
}

.product-media img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.6s cubic-bezier(0.16, 1, 0.3, 1);
}

.product-card:hover .product-media img {
  transform: scale(1.06);
}

.product-info-bar {
  padding: 22px 24px;
  background-color: var(--color-navy-card);
  display: grid;
  grid-template-columns: 1fr auto;
  align-items: center;
  gap: 16px;
  border-top: 1px solid rgba(255, 255, 255, 0.08);
}

.product-title {
  font-family: var(--font-display);
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--color-white);
  margin-bottom: 4px;
}

.product-desc {
  font-size: 0.875rem;
  color: #94a3b8;
}

/* ==========================================================================
   7. Industry Solutions Section (CSS Grid: 4 Columns)
   ========================================================================== */

.solutions-section {
  padding: 100px 0;
  background-color: var(--color-white);
}

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

.solutions-header {
  grid-template-columns: 1fr auto;
}

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

.solution-card {
  background-color: var(--color-white);
  border-radius: 8px;
  overflow: hidden;
  display: grid;
  grid-template-rows: 210px auto;
  border: 1px solid var(--color-border-light);
  box-shadow: var(--shadow-sm);
  transition: all 0.35s cubic-bezier(0.16, 1, 0.3, 1);
  cursor: pointer;
}

.solution-card:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-lg);
  border-color: rgba(0, 102, 204, 0.3);
}

.solution-media {
  overflow: hidden;
  position: relative;
}

.solution-media img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.5s ease;
}

.solution-card:hover .solution-media img {
  transform: scale(1.08);
}

.solution-body {
  padding: 20px 22px;
  display: grid;
  grid-template-rows: auto auto auto;
  gap: 6px;
}

.solution-title {
  font-family: var(--font-display);
  font-size: 1.15rem;
  font-weight: 700;
  color: var(--color-text-dark);
}

.solution-subtitle {
  font-size: 0.85rem;
  color: var(--color-text-muted);
}

.solution-action {
  margin-top: 10px;
  display: grid;
  justify-content: end;
}

.solution-card:hover .icon-arrow-blue {
  transform: translateX(5px);
}

/* ==========================================================================
   8. Our History Timeline Section (Integrated Precision SVG Canvas)
   ========================================================================== */

.history-section {
  position: relative;
  background: url('assets/history-mountain-bg.jpg') center/cover no-repeat;
  color: var(--color-white);
  padding: 100px 0 130px;
  overflow: hidden;
}

.history-bg-overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(
    180deg, 
    rgba(7, 20, 38, 0.88) 0%, 
    rgba(7, 20, 38, 0.72) 45%, 
    rgba(7, 20, 38, 0.94) 100%
  );
  z-index: 1;
}

.history-container {
  position: relative;
  z-index: 2;
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 var(--container-padding);
}

.history-header {
  grid-template-columns: 1fr auto;
}

.history-tagline {
  font-family: var(--font-display);
  font-size: 1rem;
  color: #94a3b8;
  font-weight: 500;
}

.history-track-wrapper {
  position: relative;
  width: 100%;
  margin-top: 50px;
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
  padding-bottom: 20px;
}

.timeline-svg-canvas {
  width: 100%;
  height: auto;
  min-width: 860px;
  display: block;
  overflow: visible;
}

.svg-timeline-year {
  font-family: var(--font-display);
  font-size: 21px;
  font-weight: 800;
  fill: var(--color-white);
  letter-spacing: -0.01em;
  transition: fill 0.25s ease;
}

.svg-timeline-year-peak {
  font-family: var(--font-display);
  font-size: 28px;
  font-weight: 800;
  fill: var(--color-accent-green);
  letter-spacing: -0.01em;
}

.svg-timeline-desc {
  font-family: var(--font-sans);
  font-size: 13px;
  font-weight: 500;
  fill: #cbd5e1;
}

.svg-badge-text {
  font-family: var(--font-display);
  font-size: 10.5px;
  font-weight: 800;
  fill: var(--color-navy-dark);
  letter-spacing: 1px;
}

/* Node Hover Effects */
.timeline-node-group {
  cursor: pointer;
  transition: transform 0.25s ease;
}

.timeline-node-group:hover .svg-timeline-year {
  fill: var(--color-accent-green);
}

.timeline-node-group:hover circle:nth-child(2) {
  fill: var(--color-accent-green-hover);
  r: 7px;
}

/* Radar Wave Pulse Animations */
.svg-radar-pulse-1 {
  animation: radarPulse1 2.8s cubic-bezier(0, 0, 0.2, 1) infinite;
  transform-origin: 1030px 75px;
}

.svg-radar-pulse-2 {
  animation: radarPulse2 2.8s cubic-bezier(0, 0, 0.2, 1) infinite 0.7s;
  transform-origin: 1030px 75px;
}

@keyframes radarPulse1 {
  0% {
    r: 16px;
    opacity: 0.9;
  }
  100% {
    r: 32px;
    opacity: 0;
  }
}

@keyframes radarPulse2 {
  0% {
    r: 24px;
    opacity: 0.7;
  }
  100% {
    r: 48px;
    opacity: 0;
  }
}

/* ==========================================================================
   9. Featured Projects Section (CSS Grid: 3 Columns)
   ========================================================================== */

.projects-section {
  padding: 100px 0;
  background-color: var(--color-offwhite);
}

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

.projects-header {
  grid-template-columns: 1fr auto;
}

.projects-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 28px;
}

.project-card {
  background-color: var(--color-white);
  border-radius: 8px;
  overflow: hidden;
  display: grid;
  grid-template-rows: 240px auto;
  border: 1px solid var(--color-border-light);
  box-shadow: var(--shadow-sm);
  transition: all 0.35s cubic-bezier(0.16, 1, 0.3, 1);
  cursor: pointer;
}

.project-card:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-lg);
  border-color: rgba(0, 102, 204, 0.3);
}

.project-media {
  overflow: hidden;
  position: relative;
}

.project-media img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.5s ease;
}

.project-card:hover .project-media img {
  transform: scale(1.06);
}

.project-body {
  padding: 22px 24px;
  display: grid;
  grid-template-columns: 1fr auto;
  align-items: center;
  gap: 16px;
}

.project-title {
  font-family: var(--font-display);
  font-size: 1.2rem;
  font-weight: 700;
  color: var(--color-text-dark);
  margin-bottom: 4px;
}

.project-desc {
  font-size: 0.875rem;
  color: var(--color-text-muted);
}

.project-card:hover .icon-arrow-blue {
  transform: translateX(5px);
}

/* ==========================================================================
   10. Get In Touch Contact Section (CSS Grid: 2 Columns + Form Grid)
   ========================================================================== */

.contact-section {
  padding: 100px 0;
  background: linear-gradient(135deg, #eaf2fb 0%, #f1f7fd 100%);
}

.contact-container {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 var(--container-padding);
  display: grid;
  grid-template-columns: 1fr 1.45fr;
  gap: 60px;
  align-items: center;
}

.contact-copy {
  display: grid;
  gap: 16px;
}

.contact-lead {
  font-size: 1.05rem;
  color: var(--color-text-body);
}

.contact-form-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
}

.form-group {
  position: relative;
}

.form-span-2 {
  grid-column: 1 / -1;
}

.form-input, .form-select, .form-textarea {
  width: 100%;
  background-color: var(--color-white);
  border: 1px solid #cbd5e1;
  border-radius: 6px;
  padding: 12px 18px;
  font-size: 0.95rem;
  color: var(--color-text-dark);
  transition: all 0.25s ease;
  box-shadow: 0 2px 4px rgba(0, 0, 0, 0.02);
}

.form-input:focus, .form-select:focus, .form-textarea:focus {
  border-color: var(--color-primary-blue);
  box-shadow: 0 0 0 3px rgba(0, 102, 204, 0.15);
}

.form-input::placeholder, .form-textarea::placeholder {
  color: #94a3b8;
}

.form-select-wrapper {
  position: relative;
}

.form-select {
  appearance: none;
  cursor: pointer;
  padding-right: 40px;
}

.select-chevron {
  position: absolute;
  right: 16px;
  top: 50%;
  transform: translateY(-50%);
  width: 16px;
  height: 16px;
  color: #64748b;
  pointer-events: none;
}

.form-textarea {
  resize: vertical;
  min-height: 120px;
}

.form-bottom-row {
  display: grid;
  grid-template-columns: 1fr auto;
  align-items: center;
  gap: 20px;
  margin-top: 6px;
}

.checkbox-container {
  display: grid;
  grid-template-columns: auto 1fr;
  align-items: center;
  gap: 10px;
  cursor: pointer;
}

.checkbox-container input {
  position: absolute;
  opacity: 0;
  cursor: pointer;
}

.custom-checkbox {
  width: 20px;
  height: 20px;
  border: 1.5px solid #94a3b8;
  border-radius: 4px;
  background-color: var(--color-white);
  display: grid;
  place-items: center;
  transition: all 0.2s ease;
}

.checkbox-container input:checked ~ .custom-checkbox {
  background-color: var(--color-primary-blue);
  border-color: var(--color-primary-blue);
}

.check-icon {
  width: 14px;
  height: 14px;
  color: var(--color-white);
  opacity: 0;
  transform: scale(0.7);
  transition: all 0.2s ease;
}

.checkbox-container input:checked ~ .custom-checkbox .check-icon {
  opacity: 1;
  transform: scale(1);
}

.checkbox-label {
  font-size: 0.85rem;
  color: var(--color-text-body);
  user-select: none;
}

.btn-submit {
  padding: 12px 28px;
}

.form-notification {
  grid-column: 1 / -1;
  font-size: 0.9rem;
  font-weight: 600;
  padding: 10px 16px;
  border-radius: 6px;
  display: none;
}

.form-notification.success {
  display: block;
  background-color: #dcfce7;
  color: #15803d;
  border: 1px solid #bbf7d0;
}

/* ==========================================================================
   11. Footer (CSS Grid: 5 Columns + Copyright Subgrid)
   ========================================================================== */

.site-footer {
  background-color: var(--color-navy-dark);
  color: #94a3b8;
  padding: 80px 0 30px;
  border-top: 1px solid rgba(255, 255, 255, 0.08);
}

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

.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1.25fr 1.25fr 1.6fr;
  gap: 48px;
  padding-bottom: 60px;
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
}

.footer-col {
  display: grid;
  grid-auto-rows: max-content;
  gap: 16px;
}

.logo-footer .text-white {
  color: var(--color-white);
}

.company-name {
  font-family: var(--font-display);
  font-size: 0.95rem;
  font-weight: 700;
  color: var(--color-white);
}

.company-desc {
  font-size: 0.85rem;
  color: #94a3b8;
  line-height: 1.5;
}

.social-links {
  display: grid;
  grid-auto-flow: column;
  justify-content: start;
  gap: 12px;
  margin-top: 4px;
}

.social-btn {
  width: 36px;
  height: 36px;
  border-radius: 50%;
  background-color: rgba(255, 255, 255, 0.08);
  display: grid;
  place-items: center;
  color: #cbd5e1;
  transition: all 0.25s ease;
}

.social-btn:hover {
  background-color: var(--color-primary-blue);
  color: var(--color-white);
  transform: translateY(-3px);
}

.social-btn .icon-svg {
  width: 18px;
  height: 18px;
}

.footer-heading {
  font-family: var(--font-display);
  font-size: 1.05rem;
  font-weight: 700;
  color: var(--color-white);
  margin-bottom: 6px;
}

.footer-menu {
  list-style: none;
  display: grid;
  gap: 10px;
}

.footer-menu a {
  font-size: 0.9rem;
  color: #94a3b8;
}

.footer-menu a:hover {
  color: var(--color-white);
  transform: translateX(4px);
}

.footer-contact-list {
  list-style: none;
  display: grid;
  gap: 14px;
}

.footer-contact-list li {
  display: grid;
  grid-template-columns: auto 1fr;
  align-items: center;
  gap: 12px;
  font-size: 0.9rem;
  color: #cbd5e1;
}

.icon-contact {
  width: 18px;
  height: 18px;
}

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

.footer-cta {
  margin-top: 10px;
}

.btn-footer {
  width: fit-content;
}

.footer-bottom-grid {
  padding-top: 30px;
  display: grid;
  grid-template-columns: 1fr auto;
  align-items: center;
  gap: 20px;
  font-size: 0.85rem;
  color: #64748b;
}

.footer-slogan {
  display: grid;
  grid-auto-flow: column;
  align-items: center;
  gap: 12px;
  font-weight: 500;
  color: #94a3b8;
}

.slogan-accent-bar {
  width: 32px;
  height: 4px;
  background-color: var(--color-accent-green);
  border-radius: 2px;
}

/* ==========================================================================
   Responsive Breakpoints using CSS Grid
   ========================================================================== */

/* Tablets & Small Laptops (max-width: 1024px) */
@media (max-width: 1024px) {
  .hero-container {
    grid-template-columns: 1fr;
    gap: 32px;
    padding-top: 60px;
  }

  .hero-badge-container {
    justify-items: start;
  }

  .hero-title {
    font-size: 3rem;
  }

  .stats-container {
    grid-template-columns: repeat(2, 1fr);
    gap: 32px;
  }

  .stat-divider {
    display: none;
  }

  .story-container {
    grid-template-columns: 1fr;
    gap: 40px;
  }

  .products-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .solutions-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .projects-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .contact-container {
    grid-template-columns: 1fr;
    gap: 40px;
  }

  .footer-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: 40px;
  }
}

/* Lock body scroll when drawer is open */
body.menu-open {
  overflow: hidden;
}

/* Tablet & Mobile Navigation Drawer (max-width: 991px) */
@media (max-width: 991px) {
  /* Hide desktop utility top-bar so mobile toggle button is directly at the top on loading */
  .top-bar {
    display: none !important;
  }

  .main-nav {
    position: sticky !important;
    top: 0 !important;
    z-index: 1000 !important;
    background-color: var(--color-white) !important;
    box-shadow: 0 2px 12px rgba(12, 30, 51, 0.08) !important;
  }

  .nav-container {
    display: flex !important;
    justify-content: space-between !important;
    align-items: center !important;
    gap: 16px !important;
    padding: 12px var(--container-padding) !important;
    position: relative !important;
    z-index: 1002 !important;
    background-color: var(--color-white) !important;
    width: 100% !important;
  }

  .nav-actions {
    display: flex !important;
    align-items: center !important;
    justify-content: flex-end !important;
    position: relative !important;
    z-index: 1003 !important;
  }

  .nav-enquire-desktop {
    display: none !important;
  }

  .mobile-toggle {
    display: flex !important;
    align-items: center !important;
    justify-content: center !important;
    width: 44px !important;
    height: 44px !important;
    flex-shrink: 0 !important;
    position: relative !important;
    z-index: 1004 !important;
    cursor: pointer !important;
  }

  /* Frosted Backdrop Scrim */
  .nav-backdrop {
    display: block !important;
    position: fixed !important;
    inset: 0 !important;
    top: 0 !important;
    background: rgba(7, 20, 38, 0.55) !important;
    backdrop-filter: blur(6px) !important;
    -webkit-backdrop-filter: blur(6px) !important;
    opacity: 0;
    visibility: hidden;
    transition: opacity 0.3s ease, visibility 0.3s ease;
    z-index: 998 !important;
    pointer-events: none;
  }

  .nav-backdrop.is-open {
    opacity: 1 !important;
    visibility: visible !important;
    pointer-events: auto !important;
  }

  /* Animated Slide Drawer - Left Aligned, Full Width */
  .nav-menu {
    display: grid !important;
    grid-template-columns: 100% !important;
    grid-auto-flow: row !important;
    justify-content: stretch !important;
    justify-items: stretch !important;
    align-content: start !important;
    text-align: left !important;
    position: absolute !important;
    top: 100% !important;
    left: 0 !important;
    right: 0 !important;
    width: 100% !important;
    box-sizing: border-box !important;
    background-color: var(--color-white) !important;
    padding: 16px var(--container-padding) 32px !important;
    gap: 0 !important;
    border-top: 1px solid var(--color-border-light) !important;
    box-shadow: 0 20px 40px rgba(12, 30, 51, 0.16) !important;
    z-index: 1001 !important;
    max-height: calc(100vh - 70px) !important;
    overflow-y: auto !important;
    overflow-x: hidden !important;
    -webkit-overflow-scrolling: touch !important;
    transform: translateY(-10px);
    opacity: 0;
    visibility: hidden;
    pointer-events: none;
    transition: transform 0.3s cubic-bezier(0.16, 1, 0.3, 1), opacity 0.25s ease, visibility 0.25s ease;
  }

  .nav-menu.is-open {
    transform: translateY(0) !important;
    opacity: 1 !important;
    visibility: visible !important;
    pointer-events: auto !important;
  }

  .nav-menu .nav-item {
    border-bottom: 1px solid #f1f5f9 !important;
    display: block !important;
    width: 100% !important;
    text-align: left !important;
    box-sizing: border-box !important;
  }

  .nav-item-header {
    display: flex !important;
    align-items: center !important;
    justify-content: space-between !important;
    width: 100% !important;
    text-align: left !important;
  }

  .nav-menu .nav-link {
    display: flex !important;
    align-items: center !important;
    justify-content: flex-start !important;
    padding: 14px 4px !important;
    font-size: 1.05rem !important;
    font-weight: 600 !important;
    color: var(--color-text-dark) !important;
    transition: color 0.2s ease, padding-left 0.2s ease !important;
    flex: 1 !important;
    text-align: left !important;
    width: auto !important;
  }

  .nav-menu .nav-link:hover {
    color: var(--color-primary-blue) !important;
    padding-left: 8px !important;
  }

  .nav-item.active .nav-link {
    color: var(--color-primary-blue) !important;
    font-weight: 700 !important;
  }

  .nav-item.active .nav-link::after {
    display: none !important;
  }

  .icon-nav-caret {
    display: none !important;
  }

  /* Mobile Submenu Accordion Toggle */
  .mobile-sub-toggle {
    display: flex !important;
    align-items: center !important;
    justify-content: center !important;
    width: 44px !important;
    height: 44px !important;
    background: transparent !important;
    border: none !important;
    border-radius: 8px !important;
    cursor: pointer !important;
    color: var(--color-text-dark) !important;
    transition: background-color 0.2s ease !important;
    flex-shrink: 0 !important;
  }

  .mobile-sub-toggle:hover {
    background-color: rgba(12, 30, 51, 0.06) !important;
  }

  .icon-toggle-chevron {
    width: 18px !important;
    height: 18px !important;
    stroke: currentColor !important;
    transition: transform 0.25s cubic-bezier(0.16, 1, 0.3, 1), stroke 0.2s ease !important;
  }

  .nav-item.is-expanded > .nav-item-header .icon-toggle-chevron {
    transform: rotate(180deg) !important;
    stroke: var(--color-primary-blue) !important;
  }

  /* Mobile Navigation Submenus */
  .nav-dropdown,
  .nav-megamenu {
    position: static !important;
    left: auto !important;
    right: auto !important;
    top: auto !important;
    bottom: auto !important;
    transform: none !important;
    width: 100% !important;
    max-width: 100% !important;
    margin: 0 !important;
    padding: 0 !important;
    border: none !important;
    border-radius: 0 !important;
    box-shadow: none !important;
    background: transparent !important;
    opacity: 1 !important;
    visibility: visible !important;
    pointer-events: auto !important;
    display: none;
    box-sizing: border-box !important;
    text-align: left !important;
  }

  .nav-dropdown::before,
  .nav-megamenu::before {
    display: none !important;
  }

  .has-dropdown:hover .nav-dropdown,
  .has-dropdown:focus-within .nav-dropdown,
  .has-megamenu:hover .nav-megamenu,
  .has-megamenu:focus-within .nav-megamenu {
    transform: none !important;
    left: auto !important;
    right: auto !important;
    top: auto !important;
  }

  .nav-item.is-expanded > .nav-dropdown,
  .nav-item.is-expanded > .nav-megamenu {
    display: block !important;
    transform: none !important;
    animation: drawerSubmenuFade 0.25s ease;
  }

  @keyframes drawerSubmenuFade {
    from {
      opacity: 0;
      transform: translateY(-8px);
    }
    to {
      opacity: 1;
      transform: translateY(0);
    }
  }

  /* Mobile Dropdown styling (About Us) - Left Aligned */
  .nav-dropdown .dropdown-list {
    display: grid !important;
    gap: 8px !important;
    padding: 6px 0 12px 10px !important;
    border-left: 2px solid var(--color-border-light) !important;
    margin: 4px 0 12px 6px !important;
    box-sizing: border-box !important;
    width: calc(100% - 10px) !important;
    max-width: 100% !important;
    text-align: left !important;
  }

  .nav-dropdown .dropdown-item {
    display: grid !important;
    grid-template-columns: 36px 1fr !important;
    align-items: center !important;
    gap: 12px !important;
    padding: 10px 12px !important;
    background-color: #f8fafc !important;
    border-radius: 10px !important;
    box-sizing: border-box !important;
    width: 100% !important;
    max-width: 100% !important;
    transform: none !important;
    text-decoration: none !important;
    transition: background-color 0.2s ease !important;
    text-align: left !important;
  }

  .nav-dropdown .dropdown-item:hover,
  .nav-dropdown .dropdown-item:active {
    background-color: #f1f7fe !important;
    transform: none !important;
  }

  .nav-dropdown .dropdown-icon-box {
    width: 36px !important;
    height: 36px !important;
    border-radius: 8px !important;
    background: #e8f2fc !important;
    color: var(--color-primary-blue) !important;
    display: grid !important;
    place-items: center !important;
    flex-shrink: 0 !important;
  }

  .nav-dropdown .dropdown-icon-box svg {
    width: 18px !important;
    height: 18px !important;
  }

  .nav-dropdown .dropdown-info {
    display: grid !important;
    gap: 2px !important;
    min-width: 0 !important;
    overflow: hidden !important;
    text-align: left !important;
  }

  .nav-dropdown .dropdown-title {
    font-family: var(--font-display) !important;
    font-size: 0.92rem !important;
    font-weight: 700 !important;
    color: var(--color-navy-dark) !important;
    line-height: 1.25 !important;
    white-space: normal !important;
    word-break: break-word !important;
    text-align: left !important;
  }

  .nav-dropdown .dropdown-desc {
    font-size: 0.76rem !important;
    color: var(--color-text-muted) !important;
    line-height: 1.35 !important;
    white-space: normal !important;
    word-break: break-word !important;
    text-align: left !important;
  }

  .nav-dropdown .dropdown-arrow {
    display: none !important;
  }

  /* Mobile Mega Menu styling (Products) - Left Aligned Full Width */
  .nav-megamenu .megamenu-container {
    padding: 6px 0 14px 10px !important;
    border-left: 2px solid var(--color-border-light) !important;
    margin: 4px 0 12px 6px !important;
    box-sizing: border-box !important;
    width: calc(100% - 10px) !important;
    max-width: 100% !important;
    text-align: left !important;
  }

  .nav-megamenu .megamenu-grid {
    display: grid !important;
    grid-template-columns: 1fr !important;
    gap: 14px !important;
    width: 100% !important;
    text-align: left !important;
    justify-items: stretch !important;
  }

  .nav-megamenu .megamenu-col {
    padding: 16px !important;
    background-color: #f8fafc !important;
    border: 1px solid var(--color-border-light) !important;
    border-radius: 12px !important;
    transform: none !important;
    box-shadow: none !important;
    text-align: left !important;
    box-sizing: border-box !important;
    width: 100% !important;
  }

  .nav-megamenu .megamenu-col:hover {
    transform: none !important;
  }

  .nav-megamenu .megamenu-col-header {
    display: grid !important;
    grid-template-columns: 40px 1fr !important;
    align-items: center !important;
    gap: 12px !important;
    text-align: left !important;
    width: 100% !important;
    text-decoration: none !important;
  }

  .nav-megamenu .megamenu-header-text {
    text-align: left !important;
  }

  .nav-megamenu .megamenu-col-title {
    text-align: left !important;
    font-size: 1rem !important;
  }

  .nav-megamenu .megamenu-col-sub {
    text-align: left !important;
  }

  .nav-megamenu .megamenu-sublinks {
    text-align: left !important;
    padding: 0 !important;
    margin: 6px 0 0 0 !important;
    width: 100% !important;
  }

  .nav-megamenu .megamenu-sublinks a {
    text-align: left !important;
    display: block !important;
    padding: 6px 8px !important;
    width: 100% !important;
    box-sizing: border-box !important;
  }

  .nav-megamenu .megamenu-view-link {
    justify-content: flex-start !important;
    text-align: left !important;
    margin-top: 4px !important;
  }

  .nav-megamenu .megamenu-featured-card {
    padding: 20px !important;
    border-radius: 12px !important;
    transform: none !important;
    text-align: left !important;
    box-sizing: border-box !important;
    width: 100% !important;
  }

  .mobile-drawer-footer {
    display: grid !important;
    gap: 16px !important;
    padding-top: 22px !important;
    margin-top: 8px !important;
    width: 100% !important;
    text-align: left !important;
    box-sizing: border-box !important;
  }

  .btn-drawer-cta {
    width: 100% !important;
    display: flex !important;
    align-items: center !important;
    justify-content: center !important;
    padding: 14px 24px !important;
    font-size: 1rem !important;
    box-sizing: border-box !important;
    box-shadow: 0 4px 16px rgba(0, 102, 204, 0.22) !important;
  }

  .drawer-contact-info {
    display: grid !important;
    gap: 10px !important;
    width: 100% !important;
    text-align: left !important;
  }

  .drawer-contact-item {
    justify-content: flex-start !important;
    text-align: left !important;
  }
}

/* Mobile Devices (max-width: 768px) */
@media (max-width: 768px) {
  .top-bar-container {
    grid-template-columns: 1fr;
    gap: 8px;
    text-align: center;
  }

  .top-bar-tagline, .top-bar-links {
    justify-content: center;
  }

  .hero-title {
    font-size: 2.35rem;
  }

  .stats-container {
    grid-template-columns: 1fr;
    text-align: center;
  }

  .stat-card {
    justify-items: center;
  }

  .story-grid-collage {
    grid-template-columns: 1fr;
    grid-template-rows: auto auto auto;
  }

  .collage-welder {
    grid-row: auto;
    grid-column: auto;
    height: 320px;
  }

  .collage-factory {
    grid-row: auto;
    grid-column: auto;
    height: 220px;
  }

  .collage-quote {
    grid-row: auto;
    grid-column: auto;
  }

  .products-grid, .solutions-grid, .projects-grid {
    grid-template-columns: 1fr;
  }

  .products-header, .solutions-header, .history-header, .projects-header {
    grid-template-columns: 1fr;
    gap: 12px;
  }

  .history-track-wrapper {
    margin-top: 30px;
    padding-bottom: 24px;
  }

  .contact-form-grid {
    grid-template-columns: 1fr;
  }

  .form-span-2 {
    grid-column: auto;
  }

  .form-bottom-row {
    grid-template-columns: 1fr;
    gap: 16px;
  }

  .footer-grid {
    grid-template-columns: 1fr;
    gap: 32px;
  }

  .footer-bottom-grid {
    grid-template-columns: 1fr;
    text-align: center;
    justify-items: center;
  }
}

/* ==========================================================================
   Internal Pages Design System & Global Reusable Components
   ========================================================================== */

/* Page Hero Banner */
.page-hero {
  position: relative;
  background: radial-gradient(circle at 80% 20%, rgba(0, 102, 204, 0.18) 0%, transparent 60%),
              linear-gradient(180deg, var(--color-navy-deep) 0%, var(--color-navy-dark) 100%);
  color: var(--color-white);
  padding: 80px 0 90px;
  overflow: hidden;
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
}

.page-hero::before {
  content: '';
  position: absolute;
  inset: 0;
  background-image: 
    linear-gradient(rgba(255, 255, 255, 0.03) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255, 255, 255, 0.03) 1px, transparent 1px);
  background-size: 40px 40px;
  pointer-events: none;
}

.page-hero-container {
  position: relative;
  z-index: 2;
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 var(--container-padding);
}

/* Breadcrumbs */
.breadcrumbs {
  display: flex;
  align-items: center;
  gap: 10px;
  list-style: none;
  font-size: 0.88rem;
  color: var(--color-text-light);
  margin-bottom: 24px;
}

.breadcrumbs a {
  color: #94a3b8;
  text-decoration: none;
  transition: color 0.2s ease;
}

.breadcrumbs a:hover {
  color: var(--color-accent-green);
}

.breadcrumb-sep {
  color: #64748b;
  display: flex;
  align-items: center;
}

.breadcrumb-current {
  color: var(--color-white);
  font-weight: 600;
}

.page-hero-header {
  max-width: 860px;
}

.page-hero-eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-family: var(--font-display);
  font-size: 0.85rem;
  font-weight: 700;
  letter-spacing: 0.18em;
  color: var(--color-accent-green);
  text-transform: uppercase;
  margin-bottom: 16px;
}

.page-hero-title {
  font-family: var(--font-display);
  font-size: clamp(2.4rem, 4.5vw, 3.6rem);
  font-weight: 800;
  line-height: 1.15;
  letter-spacing: -0.02em;
  color: var(--color-white);
  margin-bottom: 20px;
}

.page-hero-lead {
  font-size: 1.15rem;
  line-height: 1.65;
  color: #cbd5e1;
  max-width: 720px;
}

/* Page Sub-navigation Pill Bar */
.subnav-bar {
  background-color: var(--color-white);
  border-bottom: 1px solid var(--color-border-light);
  position: sticky;
  top: var(--main-nav-height, 74px);
  z-index: 90;
  box-shadow: 0 2px 8px rgba(12, 30, 51, 0.04);
  transition: top 0.2s ease;
}

.subnav-container {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 var(--container-padding);
  display: flex;
  align-items: center;
  gap: 8px;
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
  scrollbar-width: none;
  -ms-overflow-style: none;
}

.subnav-container::-webkit-scrollbar {
  display: none;
  height: 0;
  width: 0;
}

.subnav-item {
  display: inline-flex;
  align-items: center;
  padding: 16px 20px;
  font-size: 0.95rem;
  font-weight: 600;
  color: var(--color-text-body);
  text-decoration: none;
  white-space: nowrap;
  border-bottom: 3px solid transparent;
  transition: color 0.2s ease, border-color 0.2s ease;
  cursor: pointer;
}

.subnav-item:hover {
  color: var(--color-primary-blue);
}

.subnav-item.active {
  color: var(--color-primary-blue) !important;
  font-weight: 700 !important;
  border-bottom: 3px solid var(--color-primary-blue) !important;
}

/* Offset for sections with IDs when scrolled into view */
section[id],
.internal-section section[id] {
  scroll-margin-top: calc(var(--main-nav-height, 74px) + var(--subnav-height, 58px) + 20px);
}

/* Internal Page Section Containers */
.internal-section {
  padding: 90px 0;
}

.internal-section-alt {
  background-color: var(--color-light-bg);
}

.internal-section-dark {
  background-color: var(--color-navy-dark);
  color: var(--color-white);
}

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

/* Section Sub-heading Header */
.section-intro-header {
  margin-bottom: 50px;
  display: grid;
  gap: 12px;
}

.section-intro-header.text-center {
  text-align: center;
  justify-items: center;
}

.section-intro-header .section-lead {
  max-width: 680px;
  font-size: 1.1rem;
  line-height: 1.6;
  color: var(--color-text-body);
}

.internal-section-dark .section-intro-header .section-lead {
  color: #cbd5e1;
}

/* Engineering Specification Tables */
.specs-table-wrapper {
  width: 100%;
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
  background-color: var(--color-white);
  border-radius: 12px;
  box-shadow: var(--shadow-sm);
  border: 1px solid var(--color-border-light);
  margin: 30px 0;
}

.specs-table {
  width: 100%;
  border-collapse: collapse;
  text-align: left;
  font-size: 0.95rem;
}

.specs-table th {
  background-color: #f1f5f9;
  color: var(--color-navy-dark);
  font-weight: 700;
  padding: 16px 20px;
  border-bottom: 2px solid var(--color-border-light);
  white-space: nowrap;
}

.specs-table td {
  padding: 16px 20px;
  border-bottom: 1px solid #f1f5f9;
  color: var(--color-text-body);
}

.specs-table tbody tr:hover {
  background-color: #f8fafc;
}

.specs-badge {
  display: inline-flex;
  align-items: center;
  padding: 4px 10px;
  background-color: rgba(0, 102, 204, 0.08);
  color: var(--color-primary-blue);
  font-weight: 700;
  font-size: 0.8rem;
  border-radius: 9999px;
}

.specs-badge.badge-green {
  background-color: rgba(118, 192, 67, 0.15);
  color: #4d8c20;
}

/* Interactive Filter Tabs */
.filter-tabs-bar {
  display: flex;
  align-items: center;
  justify-content: center;
  flex-wrap: wrap;
  gap: 10px;
  margin-bottom: 45px;
}

.filter-tab-btn {
  background-color: var(--color-white);
  border: 1px solid var(--color-border-light);
  color: var(--color-text-dark);
  padding: 10px 22px;
  border-radius: 9999px;
  font-family: var(--font-display);
  font-weight: 600;
  font-size: 0.95rem;
  cursor: pointer;
  transition: all 0.25s ease;
}

.filter-tab-btn:hover {
  border-color: var(--color-primary-blue);
  color: var(--color-primary-blue);
}

.filter-tab-btn.active {
  background-color: var(--color-primary-blue);
  border-color: var(--color-primary-blue);
  color: var(--color-white);
  box-shadow: 0 4px 14px rgba(0, 102, 204, 0.25);
}

/* Modal Dialogues (QR codes, CRM RFP confirmation, Lightbox) */
.modal-overlay {
  position: fixed;
  inset: 0;
  background: rgba(7, 20, 38, 0.75);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  z-index: 9999;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 20px;
  opacity: 0;
  visibility: hidden;
  transition: opacity 0.3s ease, visibility 0.3s ease;
}

.modal-overlay.is-visible {
  opacity: 1;
  visibility: visible;
}

.modal-card {
  background-color: var(--color-white);
  border-radius: 16px;
  max-width: 520px;
  width: 100%;
  padding: 36px;
  position: relative;
  box-shadow: 0 25px 60px rgba(0, 0, 0, 0.35);
  transform: scale(0.95) translateY(15px);
  transition: transform 0.3s cubic-bezier(0.16, 1, 0.3, 1);
}

.modal-overlay.is-visible .modal-card {
  transform: scale(1) translateY(0);
}

.modal-close-btn {
  position: absolute;
  top: 18px;
  right: 18px;
  background: #f1f5f9;
  border: none;
  width: 36px;
  height: 36px;
  border-radius: 50%;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--color-text-dark);
  transition: background 0.2s ease, color 0.2s ease;
}

.modal-close-btn:hover {
  background-color: #e2e8f0;
  color: var(--color-primary-blue);
}

/* QR Code Display Container */
.qr-modal-body {
  text-align: center;
  display: grid;
  gap: 16px;
  justify-items: center;
}

.qr-code-box {
  width: 200px;
  height: 200px;
  background-color: #f8fafc;
  border: 1px solid var(--color-border-light);
  border-radius: 12px;
  padding: 16px;
  display: flex;
  align-items: center;
  justify-content: center;
}

.qr-code-box svg {
  width: 100%;
  height: 100%;
}

/* ==========================================================================
   About Us Specific Components (Founder, History Epochs, Culture, Certs)
   ========================================================================== */

/* Bilingual Founder's Letter Layout */
.founder-grid {
  display: grid;
  grid-template-columns: 1fr 1.25fr;
  gap: 60px;
  align-items: start;
}

.founder-media-sticky {
  position: sticky;
  top: 130px;
}

.founder-portrait-card {
  position: relative;
  border-radius: 16px;
  overflow: hidden;
  box-shadow: var(--shadow-lg);
  background-color: var(--color-navy-card);
}

.founder-portrait-card img {
  width: 100%;
  height: 520px;
  object-fit: cover;
  display: block;
}

.founder-portrait-overlay {
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  padding: 24px 28px;
  background: linear-gradient(180deg, transparent 0%, rgba(7, 20, 38, 0.94) 100%);
  color: var(--color-white);
}

.founder-name {
  font-family: var(--font-display);
  font-size: 1.4rem;
  font-weight: 800;
  margin-bottom: 4px;
}

.founder-title {
  font-size: 0.9rem;
  color: var(--color-accent-green);
  font-weight: 600;
  letter-spacing: 0.05em;
}

.founder-letter-container {
  display: grid;
  gap: 32px;
}

.letter-salutation {
  border-bottom: 2px solid var(--color-border-light);
  padding-bottom: 20px;
}

.letter-salutation-cn {
  font-family: var(--font-display);
  font-size: 1.85rem;
  font-weight: 800;
  color: var(--color-navy-dark);
  margin-bottom: 8px;
}

.letter-salutation-en {
  font-family: var(--font-display);
  font-size: 1.25rem;
  font-weight: 600;
  color: var(--color-primary-blue);
}

.letter-paragraph-pair {
  display: grid;
  gap: 12px;
  padding: 16px 20px;
  background-color: var(--color-white);
  border-left: 3px solid var(--color-border-light);
  border-radius: 0 10px 10px 0;
  box-shadow: var(--shadow-sm);
  transition: border-color 0.25s ease, transform 0.2s ease;
}

.letter-paragraph-pair:hover {
  border-left-color: var(--color-primary-blue);
  transform: translateX(4px);
}

.letter-cn {
  font-size: 1.05rem;
  line-height: 1.8;
  color: var(--color-text-dark);
  font-weight: 500;
}

.letter-en {
  font-size: 0.96rem;
  line-height: 1.7;
  color: var(--color-text-body);
  font-style: italic;
}

.letter-signature-block {
  margin-top: 24px;
  padding-top: 24px;
  border-top: 1px solid var(--color-border-light);
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.signature-signoff {
  font-family: var(--font-handwriting);
  font-size: 2.2rem;
  color: var(--color-primary-blue);
}

/* 6 Epochs Vertical Timeline */
.epochs-timeline {
  display: grid;
  gap: 40px;
  position: relative;
  max-width: 960px;
  margin: 0 auto;
}

.epochs-timeline::before {
  content: '';
  position: absolute;
  top: 30px;
  bottom: 30px;
  left: 32px;
  width: 3px;
  background: linear-gradient(180deg, var(--color-accent-green) 0%, var(--color-primary-blue) 100%);
  border-radius: 2px;
}

.epoch-card {
  display: grid;
  grid-template-columns: 64px 1fr;
  gap: 30px;
  position: relative;
}

.epoch-marker-col {
  display: flex;
  flex-direction: column;
  align-items: center;
  position: relative;
  z-index: 2;
}

.epoch-marker-dot {
  width: 64px;
  height: 64px;
  border-radius: 50%;
  background: var(--color-white);
  border: 4px solid var(--color-primary-blue);
  box-shadow: 0 0 0 6px rgba(0, 102, 204, 0.12);
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: 1.1rem;
  color: var(--color-primary-blue);
}

.epoch-card.epoch-flagship .epoch-marker-dot {
  border-color: var(--color-accent-green);
  color: var(--color-accent-green);
  box-shadow: 0 0 0 6px rgba(118, 192, 67, 0.2);
}

.epoch-content-card {
  background-color: var(--color-white);
  border-radius: 16px;
  padding: 36px 40px;
  box-shadow: var(--shadow-md);
  border: 1px solid var(--color-border-light);
  transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.epoch-content-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-lg);
}

.epoch-header-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 16px;
  margin-bottom: 16px;
}

.epoch-years-badge {
  font-family: var(--font-display);
  font-size: 1.35rem;
  font-weight: 800;
  color: var(--color-navy-dark);
}

.epoch-tag {
  background-color: rgba(0, 102, 204, 0.08);
  color: var(--color-primary-blue);
  padding: 6px 14px;
  border-radius: 9999px;
  font-size: 0.85rem;
  font-weight: 700;
  letter-spacing: 0.05em;
  text-transform: uppercase;
}

.epoch-card.epoch-flagship .epoch-tag {
  background-color: rgba(118, 192, 67, 0.18);
  color: #388a10;
}

.epoch-title {
  font-family: var(--font-display);
  font-size: 1.5rem;
  font-weight: 800;
  color: var(--color-navy-dark);
  margin-bottom: 12px;
}

.epoch-body {
  font-size: 1rem;
  line-height: 1.7;
  color: var(--color-text-body);
  margin-bottom: 20px;
}

.epoch-metric-box {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  padding: 10px 18px;
  background-color: #f8fafc;
  border-radius: 10px;
  border: 1px solid var(--color-border-light);
  font-size: 0.9rem;
  font-weight: 600;
  color: var(--color-navy-dark);
}

.epoch-metric-box .metric-val {
  font-weight: 800;
  color: var(--color-primary-blue);
}

/* 5 Core Values Cards Grid */
.values-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 24px;
}

.value-card {
  background-color: var(--color-white);
  border-radius: 14px;
  padding: 32px 26px;
  border: 1px solid var(--color-border-light);
  box-shadow: var(--shadow-sm);
  display: grid;
  gap: 16px;
  transition: transform 0.25s ease, border-color 0.25s ease, box-shadow 0.25s ease;
}

.value-card:hover {
  transform: translateY(-6px);
  border-color: var(--color-primary-blue);
  box-shadow: var(--shadow-md);
}

.value-icon-circle {
  width: 54px;
  height: 54px;
  border-radius: 12px;
  background-color: rgba(0, 102, 204, 0.08);
  color: var(--color-primary-blue);
  display: flex;
  align-items: center;
  justify-content: center;
  transition: background-color 0.25s ease, color 0.25s ease;
}

.value-card:hover .value-icon-circle {
  background-color: var(--color-primary-blue);
  color: var(--color-white);
}

.value-cn {
  font-family: var(--font-display);
  font-size: 1.45rem;
  font-weight: 800;
  color: var(--color-navy-dark);
}

.value-en {
  font-family: var(--font-display);
  font-size: 0.95rem;
  font-weight: 700;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--color-accent-green);
}

.value-desc {
  font-size: 0.95rem;
  line-height: 1.6;
  color: var(--color-text-body);
}

/* Spark Spirit 4 Pillars */
.spark-spirit-section {
  background: linear-gradient(135deg, var(--color-navy-dark) 0%, #0c2340 100%);
  color: var(--color-white);
  border-radius: 20px;
  padding: 56px 48px;
  margin: 60px 0;
}

.spark-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 28px;
  margin-top: 40px;
}

.spark-item {
  padding: 24px;
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid rgba(255, 255, 255, 0.1);
  border-radius: 12px;
  display: grid;
  gap: 10px;
  backdrop-filter: blur(4px);
}

.spark-item-title {
  font-family: var(--font-display);
  font-size: 1.25rem;
  font-weight: 800;
  color: #fbbf24;
}

.spark-item-desc {
  font-size: 0.92rem;
  color: #cbd5e1;
  line-height: 1.6;
}

/* Certifications & Patents Gallery */
.cert-gallery-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 30px;
}

.cert-card {
  background-color: var(--color-white);
  border-radius: 14px;
  padding: 30px;
  border: 1px solid var(--color-border-light);
  box-shadow: var(--shadow-sm);
  display: grid;
  gap: 16px;
  transition: transform 0.25s ease, box-shadow 0.25s ease;
}

.cert-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-md);
}

.cert-badge-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.cert-icon-seal {
  width: 48px;
  height: 48px;
  border-radius: 50%;
  background-color: rgba(118, 192, 67, 0.14);
  color: #3f7e1b;
  display: flex;
  align-items: center;
  justify-content: center;
}

.cert-status-tag {
  font-size: 0.75rem;
  font-weight: 700;
  color: #15803d;
  background-color: #dcfce7;
  padding: 4px 10px;
  border-radius: 9999px;
  letter-spacing: 0.05em;
  text-transform: uppercase;
}

.cert-name {
  font-family: var(--font-display);
  font-size: 1.2rem;
  font-weight: 800;
  color: var(--color-navy-dark);
}

.cert-issuer {
  font-size: 0.85rem;
  color: var(--color-text-muted);
}

.cert-desc {
  font-size: 0.92rem;
  line-height: 1.6;
  color: var(--color-text-body);
}

/* ==========================================================================
   Internal Pages Responsive Enhancements
   ========================================================================== */
@media (max-width: 991px) {
  .founder-grid {
    grid-template-columns: 1fr;
    gap: 40px;
  }
  
  .founder-media-sticky {
    position: static;
  }

  .internal-section article[style*="grid-template-columns"],
  .internal-section section[style*="grid-template-columns"],
  .internal-section div[style*="grid-template-columns: 1.2fr 0.8fr"],
  .internal-section div[style*="grid-template-columns: 1.15fr 1fr"],
  .internal-section div[style*="grid-template-columns: 1.3fr 0.7fr"],
  .internal-section div[style*="grid-template-columns: 1fr 1fr"] {
    grid-template-columns: 1fr !important;
    gap: 36px !important;
  }

  .internal-section article.filterable-item {
    grid-template-columns: 1fr !important;
  }

  .internal-section article.filterable-item > div:first-child {
    order: 2;
  }

  .internal-section article.filterable-item > div:last-child {
    order: 1;
    min-height: 280px;
  }

  .modal-card {
    padding: 28px 20px;
    max-width: 92vw;
  }
}

@media (max-width: 640px) {
  .page-hero {
    padding: 40px 0 35px;
  }

  .page-hero-title {
    font-size: 1.95rem;
  }

  .subnav-item {
    padding: 14px 14px;
    font-size: 0.88rem;
  }

  .internal-section {
    padding: 50px 0;
  }

  .filter-tab-btn {
    padding: 8px 16px;
    font-size: 0.85rem;
  }

  .specs-table th,
  .specs-table td {
    padding: 12px 14px;
    font-size: 0.85rem;
  }
}