/* ==========================================================================
   ZHENGYUAN POWER (正源智能電力) - INDUSTRIAL DESIGN SYSTEM
   Inspired by Magellan Power, WorldRST & Shenzhen Vilva Loadbanks
   ========================================================================== */

:root {
  --bg-dark: #0A1124;
  --bg-darker: #060A17;
  --bg-card: #101E3D;
  --bg-card-hover: #15274E;
  --border-color: rgba(255, 255, 255, 0.1);
  --border-accent: rgba(0, 153, 255, 0.35);

  --primary-blue: #0070F3;
  --primary-glow: #00D2FF;
  --accent-amber: #FF9900;
  --accent-amber-glow: rgba(255, 153, 0, 0.2);
  --accent-green: #00C853;
  
  --text-white: #FFFFFF;
  --text-light: #F1F5F9;
  --text-muted: #94A3B8;
  --text-dim: #64748B;
  
  --font-main: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  --font-mono: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, "Liberation Mono", monospace;
  
  --transition-fast: 0.2s cubic-bezier(0.4, 0, 0.2, 1);
  --transition-normal: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  --shadow-card: 0 10px 30px -10px rgba(0, 0, 0, 0.5);
  --shadow-glow: 0 0 25px rgba(0, 153, 255, 0.25);
  --radius-sm: 6px;
  --radius-md: 10px;
  --radius-lg: 16px;
  --radius-full: 9999px;
}

* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  scroll-behavior: smooth;
  font-size: 16px;
}

body {
  font-family: var(--font-main);
  background-color: var(--bg-dark);
  color: var(--text-light);
  line-height: 1.6;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
}

a {
  color: inherit;
  text-decoration: none;
}

button, input, select, textarea {
  font-family: inherit;
}

.container {
  width: 100%;
  max-width: 1240px;
  margin: 0 auto;
  padding: 0 24px;
}

/* ==========================================================================
   NAVIGATION
   ========================================================================== */
.header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(6, 10, 23, 0.85);
  backdrop-filter: blur(16px);
  border-bottom: 1px solid var(--border-color);
  transition: all var(--transition-normal);
}

.nav-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 76px;
}

.brand-logo {
  display: flex;
  align-items: center;
  gap: 12px;
}

.logo-icon {
  width: 42px;
  height: 42px;
  background: linear-gradient(135deg, var(--primary-blue), var(--primary-glow));
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  color: #fff;
  font-weight: 800;
  font-size: 20px;
  box-shadow: 0 0 15px rgba(0, 112, 243, 0.5);
}

.logo-text h1 {
  font-size: 19px;
  font-weight: 700;
  letter-spacing: -0.3px;
  color: var(--text-white);
  line-height: 1.1;
}

.logo-text span {
  font-size: 11px;
  text-transform: uppercase;
  color: var(--text-muted);
  letter-spacing: 1.5px;
}

.nav-menu {
  display: flex;
  align-items: center;
  gap: 32px;
  list-style: none;
}

.nav-link {
  font-size: 15px;
  font-weight: 500;
  color: var(--text-muted);
  transition: color var(--transition-fast);
  position: relative;
}

.nav-link:hover, .nav-link.active {
  color: var(--text-white);
}

.nav-link:hover::after, .nav-link.active::after {
  content: '';
  position: absolute;
  bottom: -6px;
  left: 0;
  width: 100%;
  height: 2px;
  background: var(--primary-glow);
  box-shadow: 0 0 8px var(--primary-glow);
}

.nav-actions {
  display: flex;
  align-items: center;
  gap: 14px;
}

.lang-btn {
  background: rgba(255, 255, 255, 0.08);
  border: 1px solid var(--border-color);
  color: var(--text-light);
  padding: 6px 12px;
  border-radius: var(--radius-sm);
  font-size: 13px;
  font-weight: 600;
  cursor: pointer;
  transition: all var(--transition-fast);
  display: flex;
  align-items: center;
  gap: 6px;
}

.lang-btn:hover {
  background: rgba(255, 255, 255, 0.16);
  border-color: var(--primary-glow);
}

.btn-primary {
  background: linear-gradient(135deg, var(--primary-blue), #0056b3);
  color: #ffffff;
  padding: 10px 22px;
  border-radius: var(--radius-sm);
  font-size: 14px;
  font-weight: 600;
  border: none;
  cursor: pointer;
  box-shadow: 0 4px 14px rgba(0, 112, 243, 0.35);
  transition: all var(--transition-fast);
  display: inline-flex;
  align-items: center;
  gap: 8px;
}

.btn-primary:hover {
  transform: translateY(-1px);
  box-shadow: 0 6px 20px rgba(0, 112, 243, 0.5);
  background: linear-gradient(135deg, #1a82ff, #0062cc);
}

.btn-secondary {
  background: rgba(255, 255, 255, 0.06);
  border: 1px solid var(--border-color);
  color: var(--text-light);
  padding: 10px 20px;
  border-radius: var(--radius-sm);
  font-size: 14px;
  font-weight: 600;
  cursor: pointer;
  transition: all var(--transition-fast);
  display: inline-flex;
  align-items: center;
  gap: 8px;
}

.btn-secondary:hover {
  background: rgba(255, 255, 255, 0.12);
  border-color: var(--primary-blue);
  color: var(--text-white);
}

.btn-amber {
  background: linear-gradient(135deg, var(--accent-amber), #e68500);
  color: #111;
  font-weight: 700;
  padding: 10px 22px;
  border-radius: var(--radius-sm);
  font-size: 14px;
  border: none;
  cursor: pointer;
  box-shadow: 0 4px 14px rgba(255, 153, 0, 0.3);
  transition: all var(--transition-fast);
  display: inline-flex;
  align-items: center;
  gap: 8px;
}

.btn-amber:hover {
  transform: translateY(-1px);
  box-shadow: 0 6px 20px rgba(255, 153, 0, 0.45);
}

.mobile-toggle {
  display: none;
  background: none;
  border: none;
  color: #fff;
  font-size: 24px;
  cursor: pointer;
}

/* ==========================================================================
   HERO SECTION
   ========================================================================== */
.hero {
  position: relative;
  padding: 80px 0 100px;
  overflow: hidden;
  background: radial-gradient(circle at 75% 20%, rgba(0, 112, 243, 0.15) 0%, transparent 50%),
              radial-gradient(circle at 20% 80%, rgba(255, 153, 0, 0.08) 0%, transparent 40%),
              var(--bg-dark);
  border-bottom: 1px solid var(--border-color);
}

.hero-grid {
  display: grid;
  grid-template-columns: 1.15fr 0.85fr;
  gap: 48px;
  align-items: center;
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: rgba(0, 210, 255, 0.1);
  border: 1px solid rgba(0, 210, 255, 0.3);
  padding: 6px 14px;
  border-radius: var(--radius-full);
  font-size: 13px;
  font-weight: 600;
  color: var(--primary-glow);
  margin-bottom: 24px;
}

.pulse-dot {
  width: 8px;
  height: 8px;
  background: var(--accent-green);
  border-radius: 50%;
  box-shadow: 0 0 10px var(--accent-green);
  animation: pulseAnim 2s infinite;
}

@keyframes pulseAnim {
  0% { transform: scale(0.9); opacity: 0.7; }
  50% { transform: scale(1.3); opacity: 1; }
  100% { transform: scale(0.9); opacity: 0.7; }
}

.hero-title {
  font-size: 46px;
  font-weight: 800;
  line-height: 1.18;
  color: var(--text-white);
  margin-bottom: 20px;
  letter-spacing: -0.5px;
}

.hero-title .text-gradient {
  background: linear-gradient(90deg, #FFFFFF, var(--primary-glow));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.hero-subtitle {
  font-size: 17px;
  color: var(--text-muted);
  line-height: 1.65;
  margin-bottom: 36px;
  max-width: 580px;
}

.hero-ctas {
  display: flex;
  gap: 16px;
  margin-bottom: 48px;
  flex-wrap: wrap;
}

.hero-stats {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
  padding-top: 28px;
  border-top: 1px solid var(--border-color);
}

.stat-item .stat-num {
  font-size: 26px;
  font-weight: 800;
  color: var(--text-white);
  font-family: var(--font-mono);
  display: flex;
  align-items: baseline;
}

.stat-item .stat-num span {
  font-size: 16px;
  color: var(--accent-amber);
  margin-left: 2px;
}

.stat-item .stat-desc {
  font-size: 12px;
  color: var(--text-dim);
  text-transform: uppercase;
  letter-spacing: 0.5px;
  margin-top: 4px;
}

/* HERO VISUAL CARD */
.hero-visual {
  position: relative;
}

.hero-card {
  background: var(--bg-card);
  border: 1px solid var(--border-accent);
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-card), var(--shadow-glow);
  position: relative;
}

.hero-card-header {
  background: rgba(6, 10, 23, 0.7);
  padding: 12px 18px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  border-bottom: 1px solid var(--border-color);
}

.card-status {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 12px;
  font-family: var(--font-mono);
  color: var(--primary-glow);
}

.hero-image-wrapper {
  position: relative;
  height: 380px;
  background: #000;
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
}

.hero-image-wrapper img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.6s ease;
}

.hero-card:hover .hero-image-wrapper img {
  transform: scale(1.03);
}

.image-overlay-tags {
  position: absolute;
  bottom: 16px;
  left: 16px;
  right: 16px;
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
}

.overlay-tag {
  background: rgba(10, 17, 36, 0.85);
  backdrop-filter: blur(8px);
  border: 1px solid rgba(255, 255, 255, 0.15);
  padding: 4px 10px;
  border-radius: var(--radius-sm);
  font-size: 11px;
  font-weight: 600;
  color: var(--text-light);
}

.hero-card-footer {
  padding: 16px 20px;
  background: var(--bg-card);
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.footer-info h4 {
  font-size: 16px;
  color: var(--text-white);
  font-weight: 700;
}

.footer-info p {
  font-size: 12px;
  color: var(--text-muted);
}

/* ==========================================================================
   SECTION COMMON STYLES
   ========================================================================== */
section {
  padding: 90px 0;
  position: relative;
}

.section-header {
  text-align: center;
  max-width: 720px;
  margin: 0 auto 56px;
}

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

.section-title {
  font-size: 34px;
  font-weight: 800;
  color: var(--text-white);
  margin-bottom: 16px;
  letter-spacing: -0.5px;
}

.section-desc {
  font-size: 16px;
  color: var(--text-muted);
  line-height: 1.6;
}

/* ==========================================================================
   PRODUCTS SHOWCASE
   ========================================================================== */
.product-tabs {
  display: flex;
  justify-content: center;
  gap: 12px;
  margin-bottom: 40px;
  flex-wrap: wrap;
}

.tab-btn {
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid var(--border-color);
  color: var(--text-muted);
  padding: 10px 22px;
  border-radius: var(--radius-full);
  font-size: 14px;
  font-weight: 600;
  cursor: pointer;
  transition: all var(--transition-fast);
}

.tab-btn:hover {
  color: var(--text-white);
  background: rgba(255, 255, 255, 0.1);
}

.tab-btn.active {
  background: var(--primary-blue);
  color: #fff;
  border-color: var(--primary-blue);
  box-shadow: 0 4px 14px rgba(0, 112, 243, 0.4);
}

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

.product-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  overflow: hidden;
  transition: all var(--transition-normal);
  display: flex;
  flex-direction: column;
}

.product-card:hover {
  transform: translateY(-5px);
  border-color: var(--border-accent);
  box-shadow: var(--shadow-card), 0 0 20px rgba(0, 112, 243, 0.2);
}

.product-img-box {
  position: relative;
  height: 230px;
  background: #070D1D;
  overflow: hidden;
}

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

.product-card:hover .product-img-box img {
  transform: scale(1.05);
}

.product-category-tag {
  position: absolute;
  top: 12px;
  left: 12px;
  background: rgba(10, 17, 36, 0.85);
  backdrop-filter: blur(6px);
  border: 1px solid rgba(255, 255, 255, 0.15);
  color: var(--primary-glow);
  font-size: 11px;
  font-weight: 700;
  padding: 4px 8px;
  border-radius: var(--radius-sm);
  text-transform: uppercase;
}

.product-content {
  padding: 24px;
  display: flex;
  flex-direction: column;
  flex-grow: 1;
}

.product-title {
  font-size: 18px;
  font-weight: 700;
  color: var(--text-white);
  margin-bottom: 10px;
  line-height: 1.35;
}

.product-summary {
  font-size: 13px;
  color: var(--text-muted);
  line-height: 1.5;
  margin-bottom: 20px;
  flex-grow: 1;
}

.product-spec-pills {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-bottom: 20px;
}

.spec-pill {
  background: rgba(255, 255, 255, 0.05);
  padding: 4px 10px;
  border-radius: var(--radius-sm);
  font-size: 11px;
  color: var(--text-light);
  font-family: var(--font-mono);
  border: 1px solid rgba(255, 255, 255, 0.08);
}

.product-card-footer {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding-top: 16px;
  border-top: 1px solid var(--border-color);
}

.btn-card-action {
  font-size: 13px;
  font-weight: 600;
  color: var(--primary-glow);
  background: none;
  border: none;
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  gap: 4px;
  transition: gap var(--transition-fast);
}

.btn-card-action:hover {
  gap: 8px;
  color: #fff;
}

/* ==========================================================================
   ENGINEERING CALCULATOR (SMART SIZING TOOL)
   ========================================================================== */
.calculator-section {
  background: linear-gradient(180deg, var(--bg-dark), var(--bg-darker));
  border-top: 1px solid var(--border-color);
  border-bottom: 1px solid var(--border-color);
}

.calculator-wrapper {
  background: var(--bg-card);
  border: 1px solid var(--border-accent);
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-card);
  display: grid;
  grid-template-columns: 1fr 1fr;
}

.calc-inputs-pane {
  padding: 40px;
  border-right: 1px solid var(--border-color);
}

.calc-pane-title {
  font-size: 20px;
  font-weight: 700;
  color: var(--text-white);
  margin-bottom: 8px;
  display: flex;
  align-items: center;
  gap: 10px;
}

.calc-pane-subtitle {
  font-size: 13px;
  color: var(--text-muted);
  margin-bottom: 28px;
}

.calc-form-group {
  margin-bottom: 22px;
}

.calc-label {
  display: block;
  font-size: 13px;
  font-weight: 600;
  color: var(--text-light);
  margin-bottom: 8px;
}

.calc-select, .calc-input {
  width: 100%;
  background: rgba(6, 10, 23, 0.7);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-sm);
  padding: 12px 14px;
  color: #fff;
  font-size: 14px;
  outline: none;
  transition: border-color var(--transition-fast);
}

.calc-select:focus, .calc-input:focus {
  border-color: var(--primary-glow);
  box-shadow: 0 0 10px rgba(0, 210, 255, 0.2);
}

.calc-row-2 {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
}

.range-slider-wrap {
  display: flex;
  align-items: center;
  gap: 14px;
}

.range-slider {
  flex-grow: 1;
  accent-color: var(--primary-glow);
}

.range-val {
  font-family: var(--font-mono);
  font-weight: 700;
  color: var(--primary-glow);
  width: 70px;
  text-align: right;
}

/* CALCULATOR OUTPUTS PANE */
.calc-outputs-pane {
  padding: 40px;
  background: rgba(6, 10, 23, 0.5);
  display: flex;
  flex-direction: column;
  justify-content: space-between;
}

.calc-output-cards {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 18px;
  margin-bottom: 28px;
}

.output-metric-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 18px;
  position: relative;
  overflow: hidden;
}

.output-metric-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 4px;
  height: 100%;
  background: var(--primary-blue);
}

.output-metric-card.accent-amber::before {
  background: var(--accent-amber);
}

.metric-title {
  font-size: 12px;
  color: var(--text-muted);
  text-transform: uppercase;
  margin-bottom: 6px;
}

.metric-value {
  font-size: 24px;
  font-weight: 800;
  color: var(--text-white);
  font-family: var(--font-mono);
  line-height: 1.1;
}

.metric-unit {
  font-size: 13px;
  color: var(--text-dim);
  font-weight: normal;
  margin-left: 4px;
}

.calc-summary-box {
  background: rgba(0, 112, 243, 0.08);
  border: 1px solid rgba(0, 112, 243, 0.25);
  border-radius: var(--radius-md);
  padding: 20px;
  margin-bottom: 24px;
}

.summary-title {
  font-size: 14px;
  font-weight: 700;
  color: var(--primary-glow);
  margin-bottom: 10px;
  display: flex;
  align-items: center;
  gap: 8px;
}

.summary-list {
  list-style: none;
  font-size: 13px;
  color: var(--text-light);
}

.summary-list li {
  margin-bottom: 6px;
  display: flex;
  align-items: flex-start;
  gap: 8px;
}

.summary-list li::before {
  content: '✓';
  color: var(--accent-green);
  font-weight: bold;
}

/* ==========================================================================
   SOLUTIONS & APPLICATIONS
   ========================================================================== */
.solutions-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
}

.solution-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 28px;
  transition: all var(--transition-normal);
  position: relative;
  overflow: hidden;
}

.solution-card:hover {
  transform: translateY(-4px);
  border-color: var(--border-accent);
  background: var(--bg-card-hover);
}

.solution-icon {
  width: 52px;
  height: 52px;
  background: rgba(0, 112, 243, 0.15);
  border: 1px solid rgba(0, 112, 243, 0.3);
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--primary-glow);
  font-size: 24px;
  margin-bottom: 20px;
}

.solution-title {
  font-size: 18px;
  font-weight: 700;
  color: var(--text-white);
  margin-bottom: 12px;
}

.solution-desc {
  font-size: 13px;
  color: var(--text-muted);
  line-height: 1.6;
}

/* ==========================================================================
   TECHNICAL ADVANTAGE & FACTORY STRENGTH
   ========================================================================== */
.tech-section {
  background: var(--bg-darker);
}

.tech-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 48px;
  align-items: center;
}

.tech-content h3 {
  font-size: 30px;
  font-weight: 800;
  color: var(--text-white);
  margin-bottom: 18px;
  line-height: 1.25;
}

.tech-features {
  margin-top: 32px;
  display: flex;
  flex-direction: column;
  gap: 20px;
}

.tech-feature-item {
  display: flex;
  gap: 16px;
}

.feature-num {
  width: 36px;
  height: 36px;
  background: rgba(255, 153, 0, 0.12);
  border: 1px solid rgba(255, 153, 0, 0.35);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--accent-amber);
  font-weight: 700;
  font-family: var(--font-mono);
  flex-shrink: 0;
}

.feature-text h4 {
  font-size: 16px;
  font-weight: 700;
  color: var(--text-white);
  margin-bottom: 4px;
}

.feature-text p {
  font-size: 13px;
  color: var(--text-muted);
}

.tech-media-box {
  background: var(--bg-card);
  border: 1px solid var(--border-accent);
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-card);
}

.tech-media-box img {
  width: 100%;
  height: 380px;
  object-fit: cover;
}

.tech-media-caption {
  padding: 16px 20px;
  background: rgba(6, 10, 23, 0.8);
  border-top: 1px solid var(--border-color);
  font-size: 13px;
  color: var(--text-light);
  display: flex;
  justify-content: space-between;
  align-items: center;
}

/* ==========================================================================
   RFQ / CONTACT MODAL & FORM
   ========================================================================== */
.rfq-section {
  background: radial-gradient(circle at 50% 50%, rgba(0, 112, 243, 0.1) 0%, transparent 60%),
              var(--bg-dark);
}

.rfq-card {
  background: var(--bg-card);
  border: 1px solid var(--border-accent);
  border-radius: var(--radius-lg);
  padding: 48px;
  box-shadow: var(--shadow-card), var(--shadow-glow);
  max-width: 900px;
  margin: 0 auto;
}

.rfq-form-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 20px;
  margin-bottom: 24px;
}

.rfq-full-width {
  grid-column: span 2;
}

/* MODAL STYLES */
.modal-backdrop {
  position: fixed;
  top: 0;
  left: 0;
  width: 100vw;
  height: 100vh;
  background: rgba(0, 0, 0, 0.8);
  backdrop-filter: blur(8px);
  z-index: 1000;
  display: none;
  align-items: center;
  justify-content: center;
  padding: 20px;
}

.modal-backdrop.active {
  display: flex;
}

.modal-content {
  background: var(--bg-card);
  border: 1px solid var(--border-accent);
  border-radius: var(--radius-lg);
  width: 100%;
  max-width: 680px;
  max-height: 90vh;
  overflow-y: auto;
  box-shadow: 0 20px 50px rgba(0, 0, 0, 0.8);
  position: relative;
  padding: 36px;
}

.modal-close {
  position: absolute;
  top: 20px;
  right: 20px;
  background: rgba(255, 255, 255, 0.1);
  border: none;
  color: #fff;
  width: 32px;
  height: 32px;
  border-radius: 50%;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 18px;
  transition: background var(--transition-fast);
}

.modal-close:hover {
  background: rgba(255, 255, 255, 0.25);
}

/* ==========================================================================
   FOOTER
   ========================================================================== */
.footer {
  background: var(--bg-darker);
  border-top: 1px solid var(--border-color);
  padding: 60px 0 30px;
  color: var(--text-muted);
}

.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1.5fr;
  gap: 40px;
  margin-bottom: 48px;
}

.footer-col h4 {
  color: var(--text-white);
  font-size: 15px;
  font-weight: 700;
  margin-bottom: 18px;
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.footer-links {
  list-style: none;
}

.footer-links li {
  margin-bottom: 10px;
  font-size: 14px;
}

.footer-links a:hover {
  color: var(--primary-glow);
}

.footer-bottom {
  padding-top: 24px;
  border-top: 1px solid rgba(255, 255, 255, 0.06);
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 13px;
}

/* ==========================================================================
   RESPONSIVE DESIGN (MEDIA QUERIES)
   ========================================================================== */
@media (max-width: 1024px) {
  .hero-grid {
    grid-template-columns: 1fr;
    gap: 40px;
  }
  .products-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .calculator-wrapper {
    grid-template-columns: 1fr;
  }
  .calc-inputs-pane {
    border-right: none;
    border-bottom: 1px solid var(--border-color);
  }
  .solutions-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .tech-grid {
    grid-template-columns: 1fr;
  }
  .footer-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 768px) {
  .nav-menu {
    display: none;
  }
  .mobile-toggle {
    display: block;
  }
  .hero-title {
    font-size: 32px;
  }
  .hero-stats {
    grid-template-columns: repeat(2, 1fr);
    gap: 16px;
  }
  .products-grid {
    grid-template-columns: 1fr;
  }
  .solutions-grid {
    grid-template-columns: 1fr;
  }
  .rfq-form-grid {
    grid-template-columns: 1fr;
  }
  .rfq-full-width {
    grid-column: span 1;
  }
  .footer-grid {
    grid-template-columns: 1fr;
  }
  .footer-bottom {
    flex-direction: column;
    gap: 12px;
    text-align: center;
  }
}

/* Top Contact Announcement Bar */
.top-contact-bar {
  background: #040812;
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
  font-size: 13px;
  color: var(--text-muted);
  padding: 6px 0;
}
.top-contact-inner {
  display: flex;
  justify-content: space-between;
  align-items: center;
}
.top-contact-left, .top-contact-right {
  display: flex;
  align-items: center;
  gap: 20px;
}
.contact-item-link {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  color: var(--text-light);
  transition: color var(--transition-fast);
}
.contact-item-link:hover {
  color: var(--primary-glow);
}
.contact-item-link.whatsapp:hover {
  color: #25D366;
}

/* Contact Info Cards in RFQ Section */
.contact-channels-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
  margin-bottom: 36px;
}
.contact-channel-card {
  background: rgba(6, 10, 23, 0.6);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 20px;
  display: flex;
  align-items: center;
  gap: 16px;
  transition: all var(--transition-fast);
  text-decoration: none;
}
.contact-channel-card:hover {
  border-color: var(--primary-glow);
  transform: translateY(-2px);
  background: rgba(16, 30, 61, 0.8);
}
.contact-channel-icon {
  width: 48px;
  height: 48px;
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 22px;
  flex-shrink: 0;
}
.contact-channel-icon.phone {
  background: rgba(0, 112, 243, 0.15);
  color: var(--primary-glow);
  border: 1px solid rgba(0, 112, 243, 0.3);
}
.contact-channel-icon.whatsapp {
  background: rgba(37, 211, 102, 0.15);
  color: #25D366;
  border: 1px solid rgba(37, 211, 102, 0.3);
}
.contact-channel-icon.email {
  background: rgba(255, 153, 0, 0.15);
  color: var(--accent-amber);
  border: 1px solid rgba(255, 153, 0, 0.3);
}
.contact-channel-details h5 {
  font-size: 13px;
  color: var(--text-muted);
  margin-bottom: 4px;
}
.contact-channel-details p {
  font-size: 15px;
  font-weight: 700;
  color: var(--text-white);
  font-family: var(--font-mono);
}

/* Floating Quick Contact Widget */
.floating-contact-widget {
  position: fixed;
  bottom: 24px;
  right: 24px;
  z-index: 999;
  display: flex;
  flex-direction: column;
  gap: 10px;
}
.float-btn {
  width: 52px;
  height: 52px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 24px;
  color: #fff;
  box-shadow: 0 4px 16px rgba(0,0,0,0.4);
  transition: all var(--transition-fast);
  cursor: pointer;
  text-decoration: none;
}
.float-btn:hover {
  transform: scale(1.1);
  box-shadow: 0 6px 20px rgba(0,0,0,0.6);
}
.float-btn.whatsapp {
  background: #25D366;
}
.float-btn.phone {
  background: var(--primary-blue);
}

@media (max-width: 768px) {
  .contact-channels-grid {
    grid-template-columns: 1fr;
  }
  .top-contact-inner {
    flex-direction: column;
    gap: 6px;
    text-align: center;
  }
}


/* ==========================================================================
   SERVICE & AFTER-SALES NETWORK
   ========================================================================== */
.service-section {
  background: radial-gradient(circle at 80% 30%, rgba(0, 112, 243, 0.08) 0%, transparent 60%),
              var(--bg-dark);
  border-top: 1px solid var(--border-color);
  border-bottom: 1px solid var(--border-color);
}

.service-grid-4 {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
  margin-bottom: 48px;
}

.service-feature-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 28px 24px;
  transition: all var(--transition-normal);
  display: flex;
  flex-direction: column;
}

.service-feature-card:hover {
  transform: translateY(-5px);
  border-color: var(--border-accent);
  background: var(--bg-card-hover);
  box-shadow: var(--shadow-card);
}

.service-icon-box {
  width: 52px;
  height: 52px;
  background: rgba(0, 112, 243, 0.15);
  border: 1px solid rgba(0, 112, 243, 0.35);
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 24px;
  color: var(--primary-glow);
  margin-bottom: 18px;
}

.service-icon-box.amber {
  background: rgba(255, 153, 0, 0.15);
  border-color: rgba(255, 153, 0, 0.35);
  color: var(--accent-amber);
}

.service-card-title {
  font-size: 17px;
  font-weight: 700;
  color: var(--text-white);
  margin-bottom: 10px;
}

.service-card-desc {
  font-size: 13px;
  color: var(--text-muted);
  line-height: 1.6;
  margin-bottom: 16px;
  flex-grow: 1;
}

.service-tags-wrap {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
}

.service-badge {
  font-size: 11px;
  font-family: var(--font-mono);
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid rgba(255, 255, 255, 0.1);
  padding: 3px 8px;
  border-radius: var(--radius-sm);
  color: var(--text-light);
}

/* Service Network Hubs Grid */
.network-hubs-box {
  background: rgba(6, 10, 23, 0.7);
  border: 1px solid var(--border-accent);
  border-radius: var(--radius-lg);
  padding: 36px;
  margin-bottom: 40px;
}

.hubs-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 28px;
  flex-wrap: wrap;
  gap: 16px;
}

.hubs-header h3 {
  font-size: 20px;
  color: #fff;
  font-weight: 700;
  display: flex;
  align-items: center;
  gap: 10px;
}

.hubs-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
}

.hub-item-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 20px;
  transition: all var(--transition-fast);
}

.hub-item-card:hover {
  border-color: var(--primary-glow);
  transform: translateY(-2px);
}

.hub-region-name {
  font-size: 16px;
  font-weight: 700;
  color: var(--primary-glow);
  margin-bottom: 6px;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.hub-status-tag {
  font-size: 11px;
  background: rgba(0, 200, 83, 0.15);
  color: var(--accent-green);
  border: 1px solid rgba(0, 200, 83, 0.3);
  padding: 2px 6px;
  border-radius: var(--radius-sm);
}

.hub-address {
  font-size: 12px;
  color: var(--text-muted);
  margin-bottom: 12px;
  line-height: 1.5;
}

.hub-contact-link {
  font-size: 13px;
  color: #fff;
  font-weight: 600;
  font-family: var(--font-mono);
  display: inline-flex;
  align-items: center;
  gap: 6px;
}

.hub-contact-link:hover {
  color: var(--primary-glow);
}

.service-cta-banner {
  background: linear-gradient(90deg, rgba(0, 112, 243, 0.15), rgba(255, 153, 0, 0.15));
  border: 1px solid var(--border-accent);
  border-radius: var(--radius-md);
  padding: 24px 32px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 20px;
}

.service-cta-text h4 {
  font-size: 18px;
  color: #fff;
  font-weight: 700;
  margin-bottom: 4px;
}

.service-cta-text p {
  font-size: 13px;
  color: var(--text-muted);
}

@media (max-width: 1024px) {
  .service-grid-4 {
    grid-template-columns: repeat(2, 1fr);
  }
  .hubs-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 768px) {
  .service-grid-4 {
    grid-template-columns: 1fr;
  }
  .hubs-grid {
    grid-template-columns: 1fr;
  }
  .service-cta-banner {
    flex-direction: column;
    text-align: center;
  }
}