/* ========================
   CSS Variables
   ======================== */
:root {
  --blue-dark:    #003366;
  --blue-mid:     #0052A3;
  --blue-light:   #0066CC;
  --blue-pale:    #3399FF;
  --yellow:       #FFB90F;
  --yellow-light: #FFA500;
  --red:          #E63946;
  --red-light:    #FF6B6B;
  --text-dark:    #333333;
  --text-mid:     #666666;
  --text-light:   #999999;
  --bg-white:     #FFFFFF;
  --bg-pale:      #F0F4F8;
  --bg-paler:     #F8FAFC;
  --border:       #E0E8F0;

  --font: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Arial, sans-serif;

  --sp-xs:  8px;
  --sp-sm:  16px;
  --sp-md:  24px;
  --sp-lg:  40px;
  --sp-xl:  60px;
  --sp-xxl: 80px;

  --max-w: 1200px;
  --radius: 8px;
  --shadow: 0 4px 20px rgba(0,51,102,0.10);
  --shadow-hover: 0 8px 32px rgba(0,51,102,0.18);
  --transition: 0.3s ease;
}

/* ========================
   Reset & Base
   ======================== */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
body {
  font-family: var(--font);
  font-size: 18px;
  line-height: 1.75;
  color: var(--text-dark);
  background: var(--bg-white);
  overflow-x: hidden;
}
img { max-width: 100%; height: auto; display: block; }
a { text-decoration: none; color: inherit; }
ul { list-style: none; }
button { cursor: pointer; border: none; background: none; font-family: var(--font); }

.container {
  max-width: var(--max-w);
  margin: 0 auto;
  padding: 0 20px;
}

.section-label {
  display: inline-block;
  font-size: 14px;
  font-weight: 700;
  letter-spacing: 2px;
  text-transform: uppercase;
  color: var(--yellow-light);
  margin-bottom: var(--sp-sm);
}
.section-title {
  font-size: 42px;
  font-weight: 800;
  line-height: 1.25;
  color: var(--blue-dark);
  margin-bottom: var(--sp-sm);
}
.section-desc {
  font-size: 19px;
  color: var(--text-mid);
  max-width: 640px;
  line-height: 1.8;
}
.section-header { margin-bottom: var(--sp-lg); }
.section-header.center { text-align: center; }
.section-header.center .section-desc { margin: 0 auto; }

/* ========================
   Header / Navigation
   ======================== */
#header {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 1000;
  background: #ffffff;
  border-bottom: 2px solid var(--blue-dark);
  box-shadow: 0 2px 12px rgba(0,51,102,0.10);
  transition: background var(--transition), box-shadow var(--transition);
}
#header.scrolled {
  background: #ffffff;
  box-shadow: 0 4px 20px rgba(0,51,102,0.15);
}
.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 72px;
}
.logo-link {
  display: flex;
  align-items: center;
  flex-shrink: 0;
}
.logo-link img {
  height: 44px;
  width: auto;
  object-fit: contain;
}
.nav-desktop { display: flex; align-items: center; gap: 4px; }
.nav-desktop a {
  display: block;
  padding: 8px 14px;
  font-size: 16px;
  font-weight: 600;
  color: var(--blue-dark);
  border-radius: 6px;
  letter-spacing: 0.3px;
  transition: color var(--transition), background var(--transition);
  white-space: nowrap;
}
.nav-desktop a:hover,
.nav-desktop a.active {
  color: var(--blue-light);
  background: rgba(0,102,204,0.08);
}
.nav-cta { display: flex; align-items: center; gap: var(--sp-xs); flex-shrink: 0; }
.btn-quote {
  padding: 9px 22px;
  background: var(--yellow);
  color: var(--blue-dark);
  font-size: 14px;
  font-weight: 700;
  border-radius: 6px;
  transition: background var(--transition), transform var(--transition);
  white-space: nowrap;
}
.btn-quote:hover { background: var(--yellow-light); transform: translateY(-1px); }

#menuToggle {
  display: none;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  width: 40px; height: 40px;
  gap: 5px;
  border-radius: 6px;
  transition: background var(--transition);
}
#menuToggle:hover { background: rgba(0,51,102,0.08); }
#menuToggle span {
  display: block;
  width: 22px; height: 2px;
  background: var(--blue-dark);
  border-radius: 2px;
  transition: transform var(--transition), opacity var(--transition);
}
#menuToggle.open span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
#menuToggle.open span:nth-child(2) { opacity: 0; }
#menuToggle.open span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

#navDrawer {
  display: none;
  position: fixed;
  top: 72px; left: 0; right: 0;
  background: var(--blue-dark);
  border-bottom: 2px solid var(--yellow);
  padding: var(--sp-md) 20px;
  z-index: 999;
  transform: translateY(-10px);
  opacity: 0;
  transition: transform var(--transition), opacity var(--transition);
}
#navDrawer.open { transform: translateY(0); opacity: 1; }
#navDrawer a {
  display: block;
  padding: 12px 0;
  font-size: 16px;
  font-weight: 600;
  color: rgba(255,255,255,0.85);
  border-bottom: 1px solid rgba(255,255,255,0.08);
  transition: color var(--transition);
}
#navDrawer a:last-child { border-bottom: none; }
#navDrawer a:hover { color: var(--yellow); }

/* ========================
   Page Banner
   ======================== */
#page-banner {
  position: relative;
  height: 360px;
  margin-top: 72px;
  overflow: hidden;
  display: flex;
  align-items: center;
}
.page-banner-bg {
  position: absolute;
  inset: 0;
}
.page-banner-bg img {
  width: 100%; height: 100%;
  object-fit: cover;
  object-position: center 30%;
}
.page-banner-overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(105deg, rgba(0,31,63,0.90) 0%, rgba(0,51,102,0.70) 60%, rgba(0,82,163,0.45) 100%);
}
.page-banner-content {
  position: relative;
  z-index: 2;
}
.breadcrumb {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 14px;
  color: rgba(255,255,255,0.65);
  margin-bottom: var(--sp-sm);
  flex-wrap: wrap;
}
.breadcrumb a { color: rgba(255,255,255,0.65); transition: color var(--transition); }
.breadcrumb a:hover { color: var(--yellow); }
.breadcrumb i { font-size: 10px; color: rgba(255,255,255,0.4); }
.breadcrumb span { color: var(--yellow); font-weight: 600; }
.page-banner-title {
  font-size: 52px;
  font-weight: 900;
  color: #fff;
  line-height: 1.15;
  margin-bottom: var(--sp-sm);
}
.page-banner-title span { color: var(--yellow); }
.page-banner-desc {
  font-size: 18px;
  color: rgba(255,255,255,0.78);
  max-width: 600px;
}

/* ========================
   Filter Tabs
   ======================== */
#filter-bar {
  background: var(--bg-white);
  border-bottom: 1px solid var(--border);
  position: sticky;
  top: 72px;
  z-index: 100;
  box-shadow: 0 2px 8px rgba(0,51,102,0.06);
}
.filter-inner {
  display: flex;
  align-items: center;
  gap: var(--sp-sm);
  padding: 14px 0;
  flex-wrap: wrap;
}
.filter-label {
  font-size: 14px;
  font-weight: 700;
  color: var(--text-mid);
  margin-right: var(--sp-xs);
  white-space: nowrap;
}
.filter-tabs {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
}
.filter-tab {
  padding: 8px 20px;
  font-size: 14px;
  font-weight: 600;
  color: var(--text-mid);
  background: var(--bg-pale);
  border: 2px solid transparent;
  border-radius: 30px;
  cursor: pointer;
  transition: all var(--transition);
  white-space: nowrap;
}
.filter-tab:hover {
  color: var(--blue-dark);
  border-color: var(--blue-dark);
  background: rgba(0,51,102,0.06);
}
.filter-tab.active {
  color: #fff;
  background: var(--blue-dark);
  border-color: var(--blue-dark);
}
.filter-count {
  margin-left: auto;
  font-size: 14px;
  color: var(--text-mid);
  white-space: nowrap;
}
.filter-count strong { color: var(--blue-dark); }

/* ========================
   Products Section
   ======================== */
#products-list {
  padding: var(--sp-xl) 0;
  background: var(--bg-pale);
}

.products-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--sp-md);
}

/* Product Card */
.prod-card {
  background: var(--bg-white);
  border-radius: var(--radius);
  overflow: hidden;
  box-shadow: var(--shadow);
  display: flex;
  flex-direction: column;
  transition: transform var(--transition), box-shadow var(--transition);
}
.prod-card:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-hover);
}
.prod-card.hidden { display: none; }

.prod-card-img {
  position: relative;
  aspect-ratio: 16/10;
  overflow: hidden;
  background: var(--bg-pale);
}
.prod-card-img img {
  width: 100%; height: 100%;
  object-fit: cover;
  transition: transform 0.4s ease;
}
.prod-card:hover .prod-card-img img { transform: scale(1.06); }

.prod-badge {
  position: absolute;
  top: 12px; left: 12px;
  padding: 5px 12px;
  background: var(--blue-dark);
  color: #fff;
  font-size: 14px;
  font-weight: 800;
  border-radius: 5px;
  letter-spacing: 0.5px;
}
.prod-duty-tag {
  position: absolute;
  top: 12px; right: 12px;
  padding: 4px 10px;
  font-size: 11px;
  font-weight: 700;
  border-radius: 4px;
  text-transform: uppercase;
  letter-spacing: 0.5px;
}
.prod-duty-tag.light  { background: rgba(255,185,15,0.9);  color: #fff; }
.prod-duty-tag.medium { background: rgba(0,82,163,0.9);   color: #fff; }
.prod-duty-tag.heavy  { background: rgba(230,57,70,0.9);  color: #fff; }

.prod-card-body {
  padding: var(--sp-md);
  flex: 1;
  display: flex;
  flex-direction: column;
  gap: var(--sp-sm);
}
.prod-card-title {
  font-size: 20px;
  font-weight: 800;
  color: var(--blue-dark);
  display: flex;
  align-items: center;
  justify-content: space-between;
}
.prod-energy-pill {
  display: inline-flex;
  align-items: center;
  gap: 5px;
  padding: 4px 12px;
  background: #fff8e6;
  border: 1px solid #ffe082;
  border-radius: 20px;
  font-size: 13px;
  font-weight: 700;
  color: var(--yellow-light);
}

/* Specs grid inside card */
.prod-specs {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 8px 16px;
}
.prod-spec-item {
  display: flex;
  flex-direction: column;
  gap: 2px;
}
.prod-spec-label {
  font-size: 11px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  color: var(--text-light);
}
.prod-spec-value {
  font-size: 15px;
  font-weight: 700;
  color: var(--text-dark);
}

/* Application tags */
.prod-apps {
  display: flex;
  gap: 6px;
  flex-wrap: wrap;
  padding-top: 4px;
  border-top: 1px solid var(--border);
}
.prod-app-tag {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  padding: 4px 10px;
  background: var(--bg-pale);
  color: var(--blue-mid);
  font-size: 12px;
  font-weight: 600;
  border-radius: 4px;
}
.prod-app-tag i { font-size: 11px; }

.prod-card-actions {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 8px;
  padding: 0 var(--sp-md) var(--sp-md);
}
.btn-detail {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  padding: 10px;
  background: var(--bg-pale);
  color: var(--blue-dark);
  font-size: 14px;
  font-weight: 700;
  border-radius: 6px;
  transition: background var(--transition), color var(--transition);
}
.btn-detail:hover { background: var(--blue-dark); color: var(--yellow); }
.btn-quote-card {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  padding: 10px;
  background: var(--yellow);
  color: var(--blue-dark);
  font-size: 14px;
  font-weight: 700;
  border-radius: 6px;
  transition: background var(--transition), transform var(--transition);
}
.btn-quote-card:hover { background: var(--yellow-light); transform: translateY(-1px); }

/* No results */
.no-results {
  display: none;
  text-align: center;
  padding: var(--sp-xxl) 0;
  color: var(--text-mid);
  font-size: 18px;
  grid-column: 1 / -1;
}
.no-results i { font-size: 48px; color: var(--border); margin-bottom: var(--sp-md); display: block; }

/* ========================
   Comparison Table
   ======================== */
#comparison {
  padding: var(--sp-xl) 0;
  background: var(--bg-white);
}
.specs-scroll { overflow-x: auto; -webkit-overflow-scrolling: touch; }
.specs-table {
  width: 100%;
  min-width: 960px;
  border-collapse: collapse;
  font-size: 15px;
}
.specs-table thead tr {
  background: var(--blue-dark);
  color: #fff;
}
.specs-table thead th {
  padding: 16px 14px;
  text-align: center;
  font-weight: 700;
  font-size: 14px;
  white-space: nowrap;
  border-right: 1px solid rgba(255,255,255,0.12);
}
.specs-table thead th:first-child { text-align: left; padding-left: 24px; }
.specs-table tbody tr {
  border-bottom: 1px solid var(--border);
  transition: background var(--transition);
}
.specs-table tbody tr:nth-child(even) { background: var(--bg-pale); }
.specs-table tbody tr:hover { background: #dceeff; }
.specs-table tbody td {
  padding: 14px;
  text-align: center;
  border-right: 1px solid var(--border);
  white-space: nowrap;
  font-size: 15px;
}
.specs-table tbody td:first-child {
  text-align: left;
  padding-left: 24px;
  font-weight: 800;
}
.model-link {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 4px 12px;
  background: var(--blue-dark);
  color: #fff;
  border-radius: 5px;
  font-size: 14px;
  font-weight: 700;
  transition: background var(--transition);
}
.model-link:hover { background: var(--blue-light); }
.specs-note {
  font-size: 14px;
  color: var(--text-mid);
  margin-top: var(--sp-sm);
  padding: 0 4px;
}

/* ========================
   Product Benefits
   ======================== */
#product-benefits {
  padding: var(--sp-xl) 0;
  background: var(--bg-white);
}
.benefits-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--sp-md);
}
.benefit-item {
  background: var(--bg-pale);
  border-radius: var(--radius);
  padding: var(--sp-lg) var(--sp-md);
  text-align: center;
  transition: transform var(--transition), box-shadow var(--transition);
}
.benefit-item:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-hover);
}
.benefit-icon {
  width: 64px; height: 64px;
  margin: 0 auto var(--sp-sm);
  background: linear-gradient(135deg, var(--blue-dark), var(--blue-light));
  border-radius: 50%;
  display: flex; align-items: center; justify-content: center;
}
.benefit-icon i { font-size: 24px; color: #fff; }
.benefit-item h3 {
  font-size: 18px;
  font-weight: 800;
  color: var(--blue-dark);
  margin-bottom: var(--sp-xs);
}
.benefit-item p {
  font-size: 15px;
  color: var(--text-mid);
  line-height: 1.7;
}

/* ========================
   How It Works
   ======================== */
#how-it-works {
  padding: var(--sp-xl) 0;
  background: var(--bg-pale);
}
.how-wrapper {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--sp-xl);
  align-items: center;
}
.how-image {
  border-radius: var(--radius);
  overflow: hidden;
  box-shadow: var(--shadow);
}
.how-image img {
  width: 100%; height: 100%;
  object-fit: cover;
  aspect-ratio: 4/3;
}
.how-content .section-title { margin-top: 4px; }
.how-content > p {
  font-size: 16px;
  color: var(--text-mid);
  line-height: 1.8;
  margin-bottom: var(--sp-md);
}
.how-steps {
  list-style: none;
  counter-reset: step;
  display: flex;
  flex-direction: column;
  gap: var(--sp-sm);
}
.how-steps li {
  counter-increment: step;
  position: relative;
  padding-left: 40px;
  font-size: 15px;
  color: var(--text-mid);
  line-height: 1.7;
}
.how-steps li::before {
  content: counter(step);
  position: absolute;
  left: 0; top: 0;
  width: 28px; height: 28px;
  background: var(--blue-dark);
  color: #fff;
  font-size: 13px;
  font-weight: 800;
  border-radius: 50%;
  display: flex; align-items: center; justify-content: center;
}
.how-steps li strong { color: var(--blue-dark); }

/* ========================
   Application Scenarios
   ======================== */
#use-scenarios {
  padding: var(--sp-xl) 0;
  background: var(--bg-white);
}
.scenarios-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--sp-md);
}
.scenario-card {
  background: var(--bg-pale);
  border-radius: var(--radius);
  padding: var(--sp-lg) var(--sp-md);
  border-left: 4px solid var(--blue-dark);
  transition: transform var(--transition), box-shadow var(--transition);
}
.scenario-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-hover);
}
.scenario-icon {
  width: 48px; height: 48px;
  background: rgba(0,51,102,0.08);
  border-radius: var(--radius);
  display: flex; align-items: center; justify-content: center;
  margin-bottom: var(--sp-sm);
}
.scenario-icon i { font-size: 22px; color: var(--blue-dark); }
.scenario-card h3 {
  font-size: 18px;
  font-weight: 800;
  color: var(--blue-dark);
  margin-bottom: var(--sp-xs);
}
.scenario-card p {
  font-size: 15px;
  color: var(--text-mid);
  line-height: 1.7;
}

/* ========================
   Case Studies
   ======================== */
#case-studies {
  padding: var(--sp-xl) 0;
  background: var(--bg-pale);
}
.cases-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: var(--sp-md);
}
.case-card {
  background: var(--bg-white);
  border-radius: var(--radius);
  overflow: hidden;
  box-shadow: var(--shadow);
  transition: transform var(--transition), box-shadow var(--transition);
}
.case-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-hover);
}
.case-card-img {
  position: relative;
  aspect-ratio: 16/9;
  overflow: hidden;
}
.case-card-img img {
  width: 100%; height: 100%;
  object-fit: cover;
  transition: transform 0.4s ease;
}
.case-card:hover .case-card-img img { transform: scale(1.05); }
.case-tag {
  position: absolute;
  top: 12px; left: 12px;
  padding: 5px 14px;
  background: var(--yellow);
  color: var(--blue-dark);
  font-size: 12px;
  font-weight: 800;
  border-radius: 4px;
  text-transform: uppercase;
  letter-spacing: 0.5px;
}
.case-card-body {
  padding: var(--sp-md);
}
.case-card-body h3 {
  font-size: 20px;
  font-weight: 800;
  color: var(--blue-dark);
  margin-bottom: var(--sp-xs);
}
.case-meta {
  display: flex;
  gap: var(--sp-sm);
  flex-wrap: wrap;
  margin-bottom: var(--sp-sm);
}
.case-meta span {
  display: inline-flex;
  align-items: center;
  gap: 5px;
  font-size: 13px;
  font-weight: 600;
  color: var(--text-mid);
}
.case-meta span i { color: var(--blue-light); font-size: 12px; }
.case-card-body > p {
  font-size: 15px;
  color: var(--text-mid);
  line-height: 1.7;
  margin-bottom: var(--sp-sm);
}
.case-stats {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--sp-xs);
  padding-top: var(--sp-sm);
  border-top: 1px solid var(--border);
}
.case-stat {
  text-align: center;
}
.case-stat strong {
  display: block;
  font-size: 18px;
  font-weight: 800;
  color: var(--blue-dark);
}
.case-stat span {
  font-size: 11px;
  font-weight: 600;
  color: var(--text-light);
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

/* ========================
   CTA Section
   ======================== */
#cta {
  padding: var(--sp-xl) 0;
  position: relative;
  overflow: hidden;
  background: var(--blue-dark);
}
.cta-bg { position: absolute; inset: 0; z-index: 0; }
.cta-bg img { width: 100%; height: 100%; object-fit: cover; }
.cta-overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, rgba(0,31,63,0.96) 0%, rgba(0,51,102,0.90) 100%);
  z-index: 1;
}
.cta-inner {
  position: relative;
  z-index: 2;
  text-align: center;
  max-width: 760px;
  margin: 0 auto;
}
.cta-inner .section-label { color: var(--yellow); }
.cta-inner .section-title { color: #fff; font-size: 40px; }
.cta-inner .section-desc { color: rgba(255,255,255,0.78); margin: 0 auto var(--sp-lg); }
.cta-actions {
  display: flex;
  gap: var(--sp-md);
  justify-content: center;
  flex-wrap: wrap;
  margin-bottom: var(--sp-lg);
}
.btn-whatsapp {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 14px 28px;
  background: #25D366;
  color: #fff;
  font-size: 15px;
  font-weight: 700;
  border-radius: var(--radius);
  transition: background var(--transition), transform var(--transition);
}
.btn-whatsapp:hover { background: #20be5b; transform: translateY(-2px); }
.btn-email {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 14px 28px;
  background: transparent;
  color: #fff;
  font-size: 15px;
  font-weight: 700;
  border: 2px solid rgba(255,255,255,0.5);
  border-radius: var(--radius);
  transition: border-color var(--transition), background var(--transition), transform var(--transition);
}
.btn-email:hover { border-color: #fff; background: rgba(255,255,255,0.08); transform: translateY(-2px); }
.btn-primary {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 14px 32px;
  background: var(--yellow);
  color: var(--blue-dark);
  font-size: 15px;
  font-weight: 700;
  border-radius: var(--radius);
  transition: background var(--transition), transform var(--transition);
}
.btn-primary:hover { background: var(--yellow-light); transform: translateY(-2px); }
.cta-trust {
  display: flex;
  gap: var(--sp-lg);
  justify-content: center;
  flex-wrap: wrap;
}
.trust-item {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 14px;
  color: rgba(255,255,255,0.70);
}
.trust-item i { color: var(--yellow); font-size: 16px; }

/* ========================
   Footer
   ======================== */
#footer {
  background: linear-gradient(135deg, #e3f2fd 0%, #bbdefb 50%, #90caf9 100%);
  padding: var(--sp-xl) 0 var(--sp-md);
}
.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: var(--sp-xl);
  padding-bottom: var(--sp-xl);
  border-bottom: 1px solid rgba(0,51,102,0.15);
}
.footer-brand img { height: 40px; width: auto; margin-bottom: var(--sp-md); }
.footer-brand p {
  font-size: 14px;
  font-weight: 700;
  color: #000;
  line-height: 1.75;
  margin-bottom: var(--sp-md);
}
.footer-social { display: flex; gap: var(--sp-xs); }
.social-btn {
  width: 36px; height: 36px;
  background: rgba(0,51,102,0.10);
  border-radius: 6px;
  display: flex; align-items: center; justify-content: center;
  color: var(--blue-dark);
  font-size: 15px;
  transition: background var(--transition), color var(--transition);
}
.social-btn:hover { background: var(--blue-dark); color: var(--yellow); }
.footer-col h4 {
  font-size: 14px;
  font-weight: 700;
  color: #000;
  margin-bottom: var(--sp-md);
  letter-spacing: 0.5px;
}
.footer-col ul { display: flex; flex-direction: column; gap: 10px; }
.footer-col ul li a {
  font-size: 14px;
  font-weight: 700;
  color: #000;
  transition: color var(--transition);
  display: flex;
  align-items: center;
  gap: 6px;
}
.footer-col ul li a:hover { color: var(--blue-light); }
.footer-col ul li a i { font-size: 12px; width: 14px; color: var(--blue-light); }
.footer-contact li {
  display: flex;
  gap: 10px;
  font-size: 14px;
  font-weight: 700;
  color: #000;
  line-height: 1.6;
  margin-bottom: 12px;
}
.footer-contact li i { color: var(--blue-light); margin-top: 3px; flex-shrink: 0; width: 14px; }
.footer-bottom {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding-top: var(--sp-md);
  flex-wrap: wrap;
  gap: var(--sp-sm);
}
.footer-bottom p { font-size: 13px; font-weight: 700; color: #000; }
.footer-bottom a { color: #000; font-weight: 700; transition: color var(--transition); }
.footer-bottom a:hover { color: var(--blue-dark); }

/* ========================
   Scroll To Top
   ======================== */
#scrollTop {
  position: fixed;
  bottom: 28px; right: 28px;
  width: 44px; height: 44px;
  background: var(--yellow);
  color: var(--blue-dark);
  border-radius: 50%;
  display: flex; align-items: center; justify-content: center;
  font-size: 18px;
  box-shadow: 0 4px 16px rgba(0,0,0,0.2);
  cursor: pointer;
  z-index: 500;
  opacity: 0;
  transform: translateY(10px);
  transition: opacity var(--transition), transform var(--transition), background var(--transition);
  pointer-events: none;
}
#scrollTop.visible { opacity: 1; transform: translateY(0); pointer-events: all; }
#scrollTop:hover { background: var(--yellow-light); }

/* ========================
   Reveal Animation
   ======================== */
.reveal {
  opacity: 0;
  transform: translateY(28px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}
.reveal.visible { opacity: 1; transform: translateY(0); }

/* ========================
   Responsive — Tablet ≤1024px
   ======================== */
@media (max-width: 1024px) {
  .section-title { font-size: 36px; }
  .page-banner-title { font-size: 40px; }
  .products-grid { grid-template-columns: repeat(2, 1fr); }
  .footer-grid { grid-template-columns: 1fr 1fr; gap: var(--sp-lg); }
  .nav-desktop { display: none; }
  .nav-cta { display: none; }
  #menuToggle { display: flex; }
  #navDrawer { display: block; }
  .cta-inner .section-title { font-size: 34px; }
  .benefits-grid { grid-template-columns: repeat(2, 1fr); }
  .scenarios-grid { grid-template-columns: repeat(2, 1fr); }
  .how-wrapper { grid-template-columns: 1fr; gap: var(--sp-lg); }
  .how-image { max-width: 560px; }
}

/* ========================
   Responsive — Mobile ≤640px
   ======================== */
@media (max-width: 640px) {
  .container { padding: 0 16px; }
  body { font-size: 17px; }
  .section-title { font-size: 30px; }
  #page-banner { height: 260px; }
  .page-banner-title { font-size: 28px; }
  .page-banner-desc { font-size: 15px; }
  .products-grid { grid-template-columns: 1fr; }
  .prod-specs { grid-template-columns: 1fr 1fr; }
  .benefits-grid { grid-template-columns: 1fr; }
  .scenarios-grid { grid-template-columns: 1fr; }
  .cases-grid { grid-template-columns: 1fr; }
  .case-stats { grid-template-columns: repeat(3, 1fr); }
  .footer-grid { grid-template-columns: 1fr; gap: var(--sp-lg); }
  .footer-bottom { flex-direction: column; text-align: center; }
  .cta-actions { flex-direction: column; align-items: center; }
  .cta-inner .section-title { font-size: 26px; }
  .specs-table { font-size: 13px; }
  .filter-count { width: 100%; }
}