/* ==========================================================================
   TRUNG TÂM KIỂM NGHIỆM NOVA TEK - DESIGN SYSTEM & STYLES
   Website: novatek.info.vn
   Thương hiệu: Công ty TNHH NOVA TEK Việt Nam
   ========================================================================== */

:root {
  /* Brand Colors */
  --primary-blue: #0B3C85;
  --primary-blue-dark: #072554;
  --primary-blue-light: #1A56B4;
  --primary-blue-gradient: linear-gradient(135deg, #0B3C85 0%, #1754B5 100%);

  --brand-green: #15803D;
  --brand-green-light: #22C55E;
  --brand-green-gradient: linear-gradient(135deg, #15803D 0%, #22C55E 100%);
  
  --accent-gold: #F59E0B;
  --accent-cyan: #06B6D4;

  /* Neutral Colors */
  --text-main: #0F172A;
  --text-muted: #475569;
  --text-light: #64748B;
  --text-white: #FFFFFF;

  --bg-page: #F8FAFC;
  --bg-white: #FFFFFF;
  --bg-card: #FFFFFF;
  --bg-soft-blue: #F0F6FF;
  --bg-soft-green: #F0FDF4;

  /* Borders & Shadows */
  --border-light: #E2E8F0;
  --border-blue: rgba(11, 60, 133, 0.15);
  --border-green: rgba(34, 197, 94, 0.25);
  
  --shadow-sm: 0 1px 3px rgba(0,0,0,0.06), 0 1px 2px rgba(0,0,0,0.04);
  --shadow-md: 0 4px 6px -1px rgba(0,0,0,0.08), 0 2px 4px -2px rgba(0,0,0,0.05);
  --shadow-lg: 0 10px 25px -3px rgba(11, 60, 133, 0.1), 0 4px 10px -4px rgba(11, 60, 133, 0.06);
  --shadow-xl: 0 20px 35px -5px rgba(11, 60, 133, 0.15), 0 8px 15px -6px rgba(11, 60, 133, 0.08);

  /* Radius & Transitions */
  --radius-sm: 6px;
  --radius-md: 10px;
  --radius-lg: 16px;
  --radius-xl: 24px;
  --radius-full: 9999px;

  --transition-fast: 0.2s cubic-bezier(0.4, 0, 0.2, 1);
  --transition-normal: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

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

html {
  scroll-behavior: smooth;
  font-family: 'Plus Jakarta Sans', system-ui, -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  color: var(--text-main);
  background-color: var(--bg-page);
  line-height: 1.6;
}

body {
  overflow-x: hidden;
  background-color: var(--bg-page);
}

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

a {
  color: inherit;
  text-decoration: none;
  transition: var(--transition-fast);
}

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

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

/* ==========================================================================
   TOP BAR & NAVIGATION
   ========================================================================== */
.top-bar {
  background-color: var(--primary-blue-dark);
  color: #E2E8F0;
  font-size: 0.85rem;
  padding: 8px 0;
  border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

.top-bar-inner {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 12px;
}

.top-info-list {
  display: flex;
  align-items: center;
  gap: 20px;
  list-style: none;
}

.top-info-list li {
  display: inline-flex;
  align-items: center;
  gap: 6px;
}

.top-info-list svg {
  color: var(--brand-green-light);
}

.top-badge {
  background: rgba(34, 197, 94, 0.2);
  color: #86EFAC;
  padding: 2px 10px;
  border-radius: var(--radius-full);
  font-size: 0.75rem;
  font-weight: 600;
  border: 1px solid rgba(34, 197, 94, 0.4);
}

/* Main Header */
.main-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(255, 255, 255, 0.95);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border-light);
  box-shadow: 0 4px 20px rgba(0, 0, 0, 0.04);
}

.nav-container {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 10px 24px;
  max-width: 1400px;
  width: 100%;
  margin: 0 auto;
  gap: 16px;
}

.brand-logo {
  display: flex;
  align-items: center;
  gap: 10px;
  flex-shrink: 0;
}

.brand-logo img {
  height: 46px;
  width: auto;
  object-fit: contain;
}

.brand-title-wrap {
  display: flex;
  flex-direction: column;
}

.brand-name {
  font-size: 1.2rem;
  font-weight: 800;
  letter-spacing: -0.5px;
  color: var(--primary-blue);
  line-height: 1.1;
  white-space: nowrap;
}

.brand-name span {
  color: var(--brand-green);
}

.brand-sub {
  font-size: 0.7rem;
  font-weight: 700;
  letter-spacing: 1.2px;
  text-transform: uppercase;
  color: var(--text-muted);
  white-space: nowrap;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 16px;
  list-style: none;
  flex-wrap: nowrap;
  flex-shrink: 0;
}

.nav-links li {
  white-space: nowrap;
}

.nav-links a {
  font-size: 0.9rem;
  font-weight: 600;
  color: var(--text-main);
  padding: 6px 4px;
  position: relative;
  white-space: nowrap;
  display: inline-block;
}

.nav-links a:hover, .nav-links a.active {
  color: var(--primary-blue);
}

.nav-links a::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 0%;
  height: 2px;
  background: var(--brand-green);
  transition: var(--transition-fast);
}

.nav-links a:hover::after, .nav-links a.active::after {
  width: 100%;
}

.header-actions {
  display: flex;
  align-items: center;
  gap: 10px;
  flex-shrink: 0;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 10px 22px;
  border-radius: var(--radius-md);
  font-size: 0.95rem;
  font-weight: 700;
  cursor: pointer;
  border: none;
  transition: var(--transition-normal);
  text-align: center;
}

.btn-primary {
  background: var(--primary-blue-gradient);
  color: var(--text-white);
  box-shadow: 0 4px 14px rgba(11, 60, 133, 0.35);
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 20px rgba(11, 60, 133, 0.45);
}

.btn-green {
  background: var(--brand-green-gradient);
  color: var(--text-white);
  box-shadow: 0 4px 14px rgba(21, 128, 61, 0.3);
}

.btn-green:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 20px rgba(21, 128, 61, 0.4);
}

.btn-outline {
  background: transparent;
  color: var(--primary-blue);
  border: 1.5px solid var(--primary-blue);
}

.btn-outline:hover {
  background: var(--bg-soft-blue);
}

.mobile-menu-btn {
  display: none;
  background: none;
  border: none;
  font-size: 1.5rem;
  color: var(--primary-blue);
  cursor: pointer;
}

/* ==========================================================================
   HERO SECTION
   ========================================================================== */
.hero-section {
  position: relative;
  padding: 60px 0 70px;
  background: linear-gradient(180deg, #F0F6FF 0%, #FFFFFF 100%);
  overflow: hidden;
}

.hero-grid {
  display: grid;
  grid-template-columns: 1.15fr 0.95fr;
  align-items: center;
  gap: 48px;
}

.hero-tag {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 6px 14px;
  background: #E0E7FF;
  border: 1px solid #C7D2FE;
  border-radius: var(--radius-full);
  color: var(--primary-blue);
  font-size: 0.85rem;
  font-weight: 700;
  margin-bottom: 20px;
}

.hero-tag-pulse {
  width: 8px;
  height: 8px;
  background-color: var(--brand-green);
  border-radius: 50%;
  animation: pulse 1.8s infinite;
}

@keyframes pulse {
  0% { transform: scale(0.95); box-shadow: 0 0 0 0 rgba(34, 197, 94, 0.7); }
  70% { transform: scale(1); box-shadow: 0 0 0 8px rgba(34, 197, 94, 0); }
  100% { transform: scale(0.95); box-shadow: 0 0 0 0 rgba(34, 197, 94, 0); }
}

.hero-title {
  font-size: 2.8rem;
  font-weight: 800;
  line-height: 1.2;
  color: var(--primary-blue-dark);
  margin-bottom: 20px;
  letter-spacing: -1px;
}

.hero-title .highlight-blue {
  color: var(--primary-blue);
}

.hero-title .highlight-green {
  color: var(--brand-green);
  position: relative;
  display: inline-block;
}

.hero-desc {
  font-size: 1.1rem;
  color: var(--text-muted);
  line-height: 1.7;
  margin-bottom: 32px;
}

.hero-features-list {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 14px;
  margin-bottom: 36px;
  list-style: none;
}

.hero-feature-item {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  font-size: 0.95rem;
  font-weight: 600;
  color: var(--text-main);
}

.feature-check-icon {
  width: 20px;
  height: 20px;
  background: #DCFCE7;
  color: var(--brand-green);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  margin-top: 2px;
}

.hero-cta-group {
  display: flex;
  flex-wrap: wrap;
  gap: 16px;
  margin-bottom: 28px;
}

.hero-image-wrap {
  position: relative;
}

.hero-image-card {
  position: relative;
  border-radius: var(--radius-xl);
  overflow: hidden;
  box-shadow: var(--shadow-xl);
  border: 4px solid #FFFFFF;
}

.hero-image-card img {
  width: 100%;
  height: 480px;
  object-fit: cover;
  transition: transform 0.5s ease;
}

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

/* Floating Badges on Hero Image */
.floating-badge {
  position: absolute;
  background: rgba(255, 255, 255, 0.92);
  backdrop-filter: blur(10px);
  padding: 12px 18px;
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-lg);
  border: 1px solid rgba(255, 255, 255, 0.8);
  display: flex;
  align-items: center;
  gap: 12px;
  z-index: 2;
}

.floating-badge-top {
  top: 20px;
  left: -20px;
}

.floating-badge-bottom {
  bottom: 24px;
  right: -16px;
}

.badge-icon {
  width: 42px;
  height: 42px;
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.25rem;
  flex-shrink: 0;
}

.badge-icon.blue {
  background: #EFF6FF;
  color: var(--primary-blue);
}

.badge-icon.green {
  background: #DCFCE7;
  color: var(--brand-green);
}

.badge-text-val {
  font-size: 0.95rem;
  font-weight: 800;
  color: var(--text-main);
  line-height: 1.2;
}

.badge-text-lbl {
  font-size: 0.75rem;
  color: var(--text-muted);
  font-weight: 600;
}

/* Trust Bar / Quick Stats */
.stats-strip {
  background: var(--bg-white);
  padding: 28px 0;
  border-bottom: 1px solid var(--border-light);
  box-shadow: var(--shadow-sm);
}

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

.stat-item {
  padding: 0 16px;
  border-right: 1px solid var(--border-light);
}

.stat-item:last-child {
  border-right: none;
}

.stat-number {
  font-size: 2.2rem;
  font-weight: 800;
  color: var(--primary-blue);
  line-height: 1.1;
  margin-bottom: 4px;
}

.stat-number span {
  color: var(--brand-green);
}

.stat-label {
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--text-muted);
}

/* ==========================================================================
   COA LOOKUP TOOL (Tra Cứu Kết Quả Kiểm Nghiệm)
   ========================================================================== */
.coa-section {
  padding: 70px 0;
  background: linear-gradient(180deg, #F8FAFC 0%, #EFF6FF 100%);
  position: relative;
}

.section-head {
  text-align: center;
  max-width: 780px;
  margin: 0 auto 48px;
}

.section-subtitle {
  font-size: 0.85rem;
  font-weight: 800;
  letter-spacing: 1.5px;
  text-transform: uppercase;
  color: var(--brand-green);
  margin-bottom: 8px;
  display: block;
}

.section-title {
  font-size: 2.2rem;
  font-weight: 800;
  color: var(--primary-blue-dark);
  margin-bottom: 14px;
  letter-spacing: -0.5px;
}

.section-desc {
  font-size: 1rem;
  color: var(--text-muted);
}

.coa-search-card {
  max-width: 860px;
  margin: 0 auto;
  background: var(--bg-white);
  border-radius: var(--radius-xl);
  padding: 36px 40px;
  box-shadow: var(--shadow-xl);
  border: 1px solid var(--border-blue);
}

.search-box-wrap {
  display: flex;
  gap: 12px;
  margin-bottom: 20px;
}

.search-input {
  flex: 1;
  padding: 14px 20px;
  font-size: 1rem;
  border: 2px solid var(--border-light);
  border-radius: var(--radius-md);
  outline: none;
  transition: var(--transition-fast);
}

.search-input:focus {
  border-color: var(--primary-blue);
  box-shadow: 0 0 0 4px rgba(11, 60, 133, 0.1);
}

.quick-samples {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 8px;
  font-size: 0.85rem;
  color: var(--text-muted);
}

.sample-chip {
  background: #F1F5F9;
  border: 1px solid var(--border-light);
  padding: 4px 12px;
  border-radius: var(--radius-full);
  font-weight: 600;
  color: var(--primary-blue);
  cursor: pointer;
  transition: var(--transition-fast);
}

.sample-chip:hover {
  background: var(--bg-soft-blue);
  border-color: var(--primary-blue);
}

/* Result Box */
.coa-result-box {
  margin-top: 28px;
  border-top: 2px dashed var(--border-light);
  padding-top: 24px;
  display: none;
}

.coa-result-box.active {
  display: block;
  animation: fadeIn 0.4s ease;
}

@keyframes fadeIn {
  from { opacity: 0; transform: translateY(10px); }
  to { opacity: 1; transform: translateY(0); }
}

.coa-certificate {
  background: #F8FAFC;
  border: 1.5px solid #CBD5E1;
  border-radius: var(--radius-lg);
  padding: 24px 28px;
  position: relative;
  overflow: hidden;
}

.coa-cert-stamp {
  position: absolute;
  top: 24px;
  right: 28px;
  border: 2px solid var(--brand-green);
  color: var(--brand-green);
  padding: 6px 14px;
  border-radius: var(--radius-sm);
  font-weight: 800;
  font-size: 0.85rem;
  text-transform: uppercase;
  transform: rotate(-5deg);
  background: rgba(34, 197, 94, 0.05);
}

.coa-header {
  border-bottom: 1px solid #E2E8F0;
  padding-bottom: 16px;
  margin-bottom: 16px;
}

.coa-title {
  font-size: 1.2rem;
  font-weight: 800;
  color: var(--primary-blue);
}

.coa-code {
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--text-muted);
}

.coa-meta-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 12px;
  font-size: 0.9rem;
  margin-bottom: 20px;
}

.coa-meta-item strong {
  color: var(--text-main);
}

.coa-table {
  width: 100%;
  border-collapse: collapse;
  margin-bottom: 20px;
  background: #FFFFFF;
  border-radius: var(--radius-md);
  overflow: hidden;
  box-shadow: var(--shadow-sm);
}

.coa-table th {
  background: var(--primary-blue);
  color: #FFFFFF;
  font-size: 0.85rem;
  font-weight: 700;
  text-align: left;
  padding: 10px 14px;
}

.coa-table td {
  padding: 12px 14px;
  font-size: 0.88rem;
  border-bottom: 1px solid var(--border-light);
}

.badge-pass {
  display: inline-block;
  padding: 4px 10px;
  background: #DCFCE7;
  color: #15803D;
  font-weight: 700;
  font-size: 0.78rem;
  border-radius: var(--radius-full);
}

/* ==========================================================================
   CORE SERVICES SECTION (Cadimi & Vàng Ô)
   ========================================================================== */
.services-section {
  padding: 80px 0;
  background: #FFFFFF;
}

.services-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 32px;
  margin-bottom: 48px;
}

.service-card {
  background: var(--bg-card);
  border-radius: var(--radius-xl);
  border: 1.5px solid var(--border-light);
  padding: 36px;
  transition: var(--transition-normal);
  position: relative;
  display: flex;
  flex-direction: column;
}

.service-card:hover {
  transform: translateY(-5px);
  border-color: var(--primary-blue);
  box-shadow: var(--shadow-xl);
}

.service-card.highlight {
  border-color: rgba(34, 197, 94, 0.4);
  background: linear-gradient(180deg, #FFFFFF 0%, #F0FDF4 100%);
}

.service-card.highlight:hover {
  border-color: var(--brand-green);
}

.service-badge {
  align-self: flex-start;
  padding: 5px 12px;
  border-radius: var(--radius-full);
  font-size: 0.8rem;
  font-weight: 700;
  margin-bottom: 20px;
}

.badge-cadmium {
  background: #EFF6FF;
  color: var(--primary-blue);
  border: 1px solid #BFDBFE;
}

.badge-auramine {
  background: #FEF3C7;
  color: #B45309;
  border: 1px solid #FDE68A;
}

.service-icon-wrap {
  width: 58px;
  height: 58px;
  border-radius: var(--radius-lg);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.6rem;
  margin-bottom: 20px;
}

.service-icon-blue {
  background: #EFF6FF;
  color: var(--primary-blue);
}

.service-icon-green {
  background: #DCFCE7;
  color: var(--brand-green);
}

.service-title {
  font-size: 1.5rem;
  font-weight: 800;
  color: var(--primary-blue-dark);
  margin-bottom: 12px;
  line-height: 1.3;
}

.service-summary {
  font-size: 0.98rem;
  color: var(--text-muted);
  line-height: 1.65;
  margin-bottom: 24px;
}

.service-points {
  list-style: none;
  margin-bottom: 28px;
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.service-points li {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  font-size: 0.92rem;
  color: var(--text-main);
}

.point-check {
  color: var(--brand-green);
  font-weight: bold;
  font-size: 1.1rem;
  line-height: 1;
  flex-shrink: 0;
  margin-top: 2px;
}

.service-footer {
  margin-top: auto;
  padding-top: 20px;
  border-top: 1px solid var(--border-light);
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.service-standard {
  font-size: 0.85rem;
  font-weight: 700;
  color: var(--text-muted);
}

/* Additional Services Cards (3-col) */
.extra-services-title {
  text-align: center;
  font-size: 1.4rem;
  font-weight: 800;
  color: var(--primary-blue-dark);
  margin-bottom: 24px;
}

.extra-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.extra-card {
  background: #F8FAFC;
  border: 1px solid var(--border-light);
  padding: 24px;
  border-radius: var(--radius-lg);
  transition: var(--transition-fast);
}

.extra-card:hover {
  background: #FFFFFF;
  border-color: var(--primary-blue-light);
  box-shadow: var(--shadow-md);
}

.extra-card h4 {
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--primary-blue);
  margin-bottom: 8px;
}

.extra-card p {
  font-size: 0.88rem;
  color: var(--text-muted);
  line-height: 1.55;
}

/* ==========================================================================
   FACILITIES & LAB CAPACITY SECTION
   ========================================================================== */
.lab-section {
  padding: 80px 0;
  background: linear-gradient(180deg, #FFFFFF 0%, #F0F6FF 100%);
}

.lab-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  align-items: center;
  gap: 52px;
}

.lab-image-box {
  position: relative;
  border-radius: var(--radius-xl);
  overflow: hidden;
  box-shadow: var(--shadow-xl);
  border: 4px solid #FFFFFF;
}

.lab-image-box img {
  width: 100%;
  height: 440px;
  object-fit: cover;
}

.lab-spec-card {
  position: absolute;
  bottom: 20px;
  left: 20px;
  right: 20px;
  background: rgba(11, 60, 133, 0.9);
  backdrop-filter: blur(8px);
  color: #FFFFFF;
  padding: 16px 20px;
  border-radius: var(--radius-md);
}

.lab-spec-title {
  font-size: 0.95rem;
  font-weight: 700;
  margin-bottom: 4px;
}

.lab-spec-desc {
  font-size: 0.82rem;
  color: #CBD5E1;
}

.lab-content h3 {
  font-size: 2.1rem;
  font-weight: 800;
  color: var(--primary-blue-dark);
  line-height: 1.25;
  margin-bottom: 18px;
}

.lab-lead {
  font-size: 1.05rem;
  color: var(--text-muted);
  line-height: 1.7;
  margin-bottom: 24px;
}

.lab-feature-list {
  display: flex;
  flex-direction: column;
  gap: 16px;
  margin-bottom: 32px;
}

.lab-feat {
  display: flex;
  gap: 16px;
  align-items: flex-start;
}

.feat-icon-sq {
  width: 44px;
  height: 44px;
  border-radius: var(--radius-md);
  background: #E0E7FF;
  color: var(--primary-blue);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.2rem;
  flex-shrink: 0;
}

.feat-details h4 {
  font-size: 1rem;
  font-weight: 700;
  color: var(--text-main);
  margin-bottom: 4px;
}

.feat-details p {
  font-size: 0.88rem;
  color: var(--text-muted);
  line-height: 1.5;
}

/* ==========================================================================
   WORKFLOW / STEPS SECTION
   ========================================================================== */
.workflow-section {
  padding: 80px 0;
  background: #FFFFFF;
}

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

.step-card {
  background: #F8FAFC;
  border: 1px solid var(--border-light);
  border-radius: var(--radius-lg);
  padding: 30px 24px;
  text-align: center;
  position: relative;
  transition: var(--transition-fast);
}

.step-card:hover {
  background: #FFFFFF;
  border-color: var(--brand-green);
  box-shadow: var(--shadow-lg);
  transform: translateY(-4px);
}

.step-number {
  width: 42px;
  height: 42px;
  background: var(--primary-blue);
  color: #FFFFFF;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 800;
  font-size: 1.1rem;
  margin: 0 auto 18px;
  box-shadow: 0 4px 10px rgba(11, 60, 133, 0.3);
}

.step-card:nth-child(2) .step-number {
  background: var(--brand-green);
}

.step-card:nth-child(3) .step-number {
  background: var(--accent-gold);
}

.step-card:nth-child(4) .step-number {
  background: var(--primary-blue-light);
}

.step-title {
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--primary-blue-dark);
  margin-bottom: 10px;
}

.step-desc {
  font-size: 0.88rem;
  color: var(--text-muted);
  line-height: 1.55;
}

/* ==========================================================================
   CONTACT & REGISTRATION SECTION
   ========================================================================== */
.contact-section {
  padding: 80px 0;
  background: linear-gradient(135deg, #072554 0%, #0B3C85 100%);
  color: #FFFFFF;
  position: relative;
}

.contact-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 48px;
  align-items: flex-start;
}

.contact-info-col h2 {
  font-size: 2.3rem;
  font-weight: 800;
  line-height: 1.25;
  margin-bottom: 16px;
  color: #FFFFFF;
}

.contact-info-col p {
  color: #CBD5E1;
  font-size: 1.05rem;
  line-height: 1.7;
  margin-bottom: 32px;
}

.contact-details-list {
  display: flex;
  flex-direction: column;
  gap: 20px;
  margin-bottom: 36px;
}

.contact-item {
  display: flex;
  align-items: flex-start;
  gap: 16px;
}

.contact-icon {
  width: 44px;
  height: 44px;
  background: rgba(255, 255, 255, 0.12);
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.25rem;
  color: #86EFAC;
  flex-shrink: 0;
}

.contact-text h5 {
  font-size: 0.85rem;
  text-transform: uppercase;
  letter-spacing: 1px;
  color: #94A3B8;
  margin-bottom: 2px;
}

.contact-text p, .contact-text a {
  font-size: 1.05rem;
  font-weight: 700;
  color: #FFFFFF;
}

.legal-box {
  background: rgba(255, 255, 255, 0.08);
  border: 1px solid rgba(255, 255, 255, 0.15);
  border-radius: var(--radius-md);
  padding: 20px;
  font-size: 0.88rem;
  color: #E2E8F0;
}

.legal-box strong {
  color: #FFFFFF;
}

/* Contact Form Card */
.form-card {
  background: #FFFFFF;
  color: var(--text-main);
  border-radius: var(--radius-xl);
  padding: 40px;
  box-shadow: 0 25px 50px -12px rgba(0, 0, 0, 0.25);
}

.form-header {
  margin-bottom: 24px;
}

.form-header h3 {
  font-size: 1.5rem;
  font-weight: 800;
  color: var(--primary-blue-dark);
  margin-bottom: 6px;
}

.form-header p {
  font-size: 0.9rem;
  color: var(--text-muted);
}

.form-group {
  margin-bottom: 18px;
}

.form-group label {
  display: block;
  font-size: 0.88rem;
  font-weight: 700;
  color: var(--text-main);
  margin-bottom: 6px;
}

.form-control {
  width: 100%;
  padding: 12px 16px;
  border: 1.5px solid var(--border-light);
  border-radius: var(--radius-md);
  font-size: 0.95rem;
  outline: none;
  transition: var(--transition-fast);
}

.form-control:focus {
  border-color: var(--primary-blue);
  box-shadow: 0 0 0 3px rgba(11, 60, 133, 0.1);
}

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

.form-success-msg {
  display: none;
  background: #DCFCE7;
  color: #15803D;
  padding: 14px;
  border-radius: var(--radius-md);
  font-weight: 600;
  margin-top: 16px;
  text-align: center;
}

/* ==========================================================================
   FOOTER
   ========================================================================== */
.main-footer {
  background: #04142F;
  color: #94A3B8;
  padding: 60px 0 24px;
  border-top: 1px solid rgba(255, 255, 255, 0.08);
}

.footer-grid {
  display: grid;
  grid-template-columns: 1.5fr 1fr 1fr 1.2fr;
  gap: 36px;
  margin-bottom: 48px;
}

.footer-brand p {
  font-size: 0.88rem;
  line-height: 1.6;
  margin-top: 14px;
  color: #94A3B8;
}

.footer-col h4 {
  color: #FFFFFF;
  font-size: 1rem;
  font-weight: 700;
  margin-bottom: 18px;
}

.footer-links {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.footer-links a {
  font-size: 0.88rem;
  color: #94A3B8;
}

.footer-links a:hover {
  color: #FFFFFF;
  padding-left: 4px;
}

.footer-bottom {
  border-top: 1px solid rgba(255, 255, 255, 0.08);
  padding-top: 24px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 12px;
  font-size: 0.82rem;
}

/* ==========================================================================
   FLOATING ACTION BUTTONS (HOTLINE & ZALO)
   ========================================================================== */
.floating-contact {
  position: fixed;
  bottom: 24px;
  right: 24px;
  display: flex;
  flex-direction: column;
  gap: 12px;
  z-index: 999;
}

.floating-btn {
  width: 54px;
  height: 54px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  color: #FFFFFF;
  box-shadow: 0 6px 20px rgba(0, 0, 0, 0.25);
  transition: transform 0.25s ease;
  position: relative;
}

.floating-btn:hover {
  transform: scale(1.1);
}

.btn-float-phone {
  background: linear-gradient(135deg, #10B981 0%, #059669 100%);
  animation: phonePulse 2s infinite;
}

.btn-float-zalo {
  background: #0068FF;
}

@keyframes phonePulse {
  0% { box-shadow: 0 0 0 0 rgba(16, 185, 129, 0.7); }
  70% { box-shadow: 0 0 0 14px rgba(16, 185, 129, 0); }
  100% { box-shadow: 0 0 0 0 rgba(16, 185, 129, 0); }
}

/* Modal for Business Certificate */
.modal-overlay {
  display: none;
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.75);
  backdrop-filter: blur(4px);
  z-index: 1000;
  align-items: center;
  justify-content: center;
  padding: 20px;
}

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

.modal-content {
  background: #FFFFFF;
  border-radius: var(--radius-lg);
  max-width: 650px;
  width: 100%;
  max-height: 90vh;
  overflow-y: auto;
  position: relative;
  padding: 24px;
}

.modal-close {
  position: absolute;
  top: 14px;
  right: 14px;
  background: #F1F5F9;
  border: none;
  width: 32px;
  height: 32px;
  border-radius: 50%;
  font-size: 1.2rem;
  cursor: pointer;
}

/* Responsive */
@media (max-width: 1200px) {
  .nav-links {
    gap: 10px;
  }
  .nav-links a {
    font-size: 0.84rem;
    padding: 6px 2px;
  }
}

@media (max-width: 1040px) {
  .hero-grid, .lab-grid, .contact-grid {
    grid-template-columns: 1fr;
    gap: 36px;
  }
  .services-grid {
    grid-template-columns: 1fr;
  }
  .stats-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: 20px;
  }
  .steps-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .footer-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .nav-links {
    display: none;
  }
  .mobile-menu-btn {
    display: block;
  }
}

@media (max-width: 640px) {
  .stats-grid, .steps-grid, .extra-grid, .footer-grid, .form-row {
    grid-template-columns: 1fr;
  }
  .hero-title {
    font-size: 2.1rem;
  }
  .hero-features-list {
    grid-template-columns: 1fr;
  }
  .search-box-wrap {
    flex-direction: column;
  }
  .coa-meta-grid {
    grid-template-columns: 1fr;
  }
  .floating-badge {
    position: static;
    margin-top: 12px;
  }
}