/* ============================================
   LISHI LASER Mixed Gas Device — Industrial Dark Theme
   ============================================ */

/* CSS Variables */
:root {
  --color-bg: #f5f5f5;
  --color-bg-dark: #0f172a;
  --color-bg-dark-alt: #1e293b;
  --color-surface: #ffffff;
  --color-surface-2: #f1f5f9;
  --color-border: #e2e8f0;
  --color-primary: #dc2626;
  --color-primary-light: #ef4444;
  --color-primary-dark: #b91c1c;
  --color-primary-glow: rgba(220, 38, 38, 0.15);
  --color-accent: #f59e0b;
  --color-text: #0f172a;
  --color-text-muted: #475569;
  --color-text-dim: #64748b;
  --color-text-inverse: #f8fafc;
  --color-text-inverse-muted: rgba(248, 250, 252, 0.6);
  --color-success: #22c55e;
  --color-warning: #f59e0b;
  --color-danger: #dc2626;
  --font-heading: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  --font-body: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  --radius: 4px;
  --radius-lg: 6px;
  --transition: 0.3s ease;
  --shadow: 0 1px 2px rgba(0,0,0,0.05);
  --shadow-lg: 0 4px 16px rgba(0,0,0,0.1);
}

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

html {
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-body);
  background-color: var(--color-bg);
  color: var(--color-text);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

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

/* Typography */
h1, h2, h3, h4 {
  font-weight: 800;
  line-height: 1.15;
  color: var(--color-text);
}

h1 { font-size: clamp(2.5rem, 5vw, 4rem); }
h2 { font-size: clamp(1.75rem, 3vw, 2.5rem); }
h3 { font-size: clamp(1.25rem, 2vw, 1.5rem); }

p { color: var(--color-text-muted); }

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

a:hover {
  color: var(--color-primary-dark);
}

/* Container */
.container {
  width: 100%;
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px;
}

/* ============================================
   HEADER / NAV — Dark
   ============================================ */
.header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  background: var(--color-bg-dark);
  border-bottom: 1px solid rgba(255,255,255,0.08);
  transition: background 0.3s ease, box-shadow 0.3s ease;
}

.header.shrunk {
  background: rgba(15, 23, 42, 0.97);
  box-shadow: 0 4px 24px rgba(0, 0, 0, 0.3);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 72px;
  transition: height 0.3s ease;
}

.header.shrunk .header-inner {
  height: 56px;
}

.header.shrunk .logo img {
  height: 32px;
  transition: height 0.3s ease;
}

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

.logo img {
  width: auto;
  height: 40px;
  object-fit: contain;
}

.logo-text {
  display: flex;
  flex-direction: column;
}

.logo-brand {
  font-size: 1rem;
  font-weight: 800;
  color: #ffffff;
  letter-spacing: 1px;
}

.logo-tagline {
  font-size: 0.65rem;
  color: var(--color-primary);
  letter-spacing: 1.5px;
  text-transform: uppercase;
}

.nav {
  display: flex;
  align-items: center;
  gap: 0;
}

.nav a {
  color: rgba(255,255,255,0.6);
  font-size: 0.8rem;
  font-weight: 500;
  padding: 10px 12px;
  border-radius: 0;
  transition: all var(--transition);
  letter-spacing: 0.3px;
}

.nav a:hover,
.nav a.active {
  color: #ffffff;
  background: transparent;
}

.nav-cta {
  background: var(--color-primary) !important;
  color: white !important;
  margin-left: 12px;
  font-weight: 600 !important;
  letter-spacing: 0 !important;
}

.nav-cta:hover {
  background: var(--color-primary-dark) !important;
  color: white !important;
}

.mobile-toggle {
  display: none;
  background: none;
  border: none;
  color: white;
  font-size: 1.5rem;
  cursor: pointer;
  padding: 8px;
}

/* ============================================
   HERO — Dark Background
   ============================================ */
.hero {
  min-height: 100vh;
  display: flex;
  align-items: center;
  padding-top: 72px;
  position: relative;
  overflow: hidden;
  background: var(--color-bg-dark);
}

.hero::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background:
    radial-gradient(ellipse 60% 50% at 70% 50%, rgba(220, 38, 38, 0.08), transparent),
    radial-gradient(ellipse 40% 60% at 20% 80%, rgba(245, 158, 11, 0.04), transparent);
  pointer-events: none;
}

.hero-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 64px;
  align-items: center;
}

.hero-content {
  position: relative;
  z-index: 1;
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: rgba(255,255,255,0.06);
  border: 1px solid rgba(255,255,255,0.1);
  padding: 8px 16px;
  border-radius: 2px;
  font-size: 0.85rem;
  color: rgba(255,255,255,0.6);
  margin-bottom: 24px;
}

.hero-badge span {
  color: var(--color-primary-light);
  font-weight: 600;
}

.hero h1 {
  margin-bottom: 16px;
  color: white;
}

.hero h1 .accent {
  color: var(--color-primary-light);
}

.hero-subtitle {
  font-size: 1.15rem;
  color: rgba(255,255,255,0.55);
  margin-bottom: 32px;
  max-width: 500px;
  line-height: 1.7;
}

.hero-stats {
  display: flex;
  gap: 40px;
  margin-bottom: 40px;
  padding: 24px 0;
  border-top: 1px solid rgba(255,255,255,0.08);
  border-bottom: 1px solid rgba(255,255,255,0.08);
}

.hero-stat {
  text-align: left;
}

.hero-stat-value {
  font-size: 2.5rem;
  font-weight: 800;
  color: var(--color-primary-light);
  line-height: 1;
}

.hero-stat-label {
  font-size: 0.8rem;
  color: rgba(255,255,255,0.4);
  margin-top: 4px;
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.hero-actions {
  display: flex;
  gap: 16px;
  flex-wrap: wrap;
}

.hero-visual {
  position: relative;
  display: flex;
  align-items: center;
  justify-content: center;
}

.hero-image {
  width: 100%;
  max-width: 500px;
  border-radius: var(--radius-lg);
  border: 1px solid rgba(255,255,255,0.08);
  box-shadow: 0 32px 80px rgba(0, 0, 0, 0.4), 0 0 60px rgba(220, 38, 38, 0.06);
  transition: transform 0.5s cubic-bezier(0.16, 1, 0.3, 1), box-shadow 0.5s ease;
}

.hero-image:hover {
  transform: scale(1.02);
  box-shadow: 0 32px 80px rgba(0, 0, 0, 0.5), 0 0 80px rgba(220, 38, 38, 0.1);
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 14px 28px;
  border-radius: var(--radius);
  font-size: 0.95rem;
  font-weight: 600;
  cursor: pointer;
  border: none;
  transition: background var(--transition), transform var(--transition), box-shadow var(--transition);
  text-decoration: none;
  letter-spacing: 0.3px;
}

.btn-primary {
  background: var(--color-primary);
  color: white;
}

.btn-primary:hover {
  background: var(--color-primary-dark);
  color: white;
  transform: translateY(-2px);
  box-shadow: 0 6px 20px rgba(220, 38, 38, 0.4);
}

.btn-primary:active {
  transform: translateY(0) scale(0.98);
  box-shadow: 0 2px 8px rgba(220, 38, 38, 0.3);
}

.btn-secondary {
  background: transparent;
  color: var(--color-text);
  border: 1px solid var(--color-border);
}

.btn-secondary:hover {
  background: var(--color-surface-2);
  color: var(--color-primary);
  border-color: var(--color-primary);
}

.section-dark .btn-secondary,
.section-cta .btn-secondary,
.hero .btn-secondary {
  color: white;
  border-color: rgba(255,255,255,0.2);
}

.section-dark .btn-secondary:hover,
.section-cta .btn-secondary:hover,
.hero .btn-secondary:hover {
  background: rgba(255,255,255,0.05);
  color: white;
  border-color: rgba(255,255,255,0.4);
}

/* ============================================
   SECTIONS
   ============================================ */
.section {
  padding: 100px 0;
  scroll-margin-top: 80px;
}

.section-dark {
  background: var(--color-bg-dark);
  color: var(--color-text-inverse);
  position: relative;
}

/* Grain texture overlay for industrial feel */
.section-dark::after,
.hero::after {
  content: '';
  position: absolute;
  inset: 0;
  opacity: 0.03;
  pointer-events: none;
  background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 256 256' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='noise'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='4' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23noise)'/%3E%3C/svg%3E");
  background-repeat: repeat;
  background-size: 256px 256px;
}

.section-dark h2,
.section-dark h3,
.section-dark h4 {
  color: white;
}

.section-dark p {
  color: var(--color-text-inverse-muted);
}

.section-dark .section-label {
  color: var(--color-primary-light);
}

.section-dark .section-header p {
  color: var(--color-text-inverse-muted);
}

.section-alt {
  background: var(--color-surface-2);
}

.section-alt h2,
.section-alt h3,
.section-alt h4 {
  color: var(--color-text);
}

.section-alt p {
  color: var(--color-text-muted);
}

.section-header {
  text-align: center;
  max-width: 700px;
  margin: 0 auto 64px;
}

.section-header p {
  margin-top: 16px;
  font-size: 1.1rem;
  color: var(--color-text-muted);
}

.section-label {
  display: inline-block;
  font-size: 0.75rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 3px;
  color: var(--color-primary);
  margin-bottom: 12px;
}

/* ============================================
   HOW IT WORKS — Dark Section
   ============================================ */
.principle-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 64px;
  align-items: center;
}

.principle-visual {
  position: relative;
}

.flow-diagram {
  background: var(--color-bg-dark-alt);
  border: 1px solid rgba(255,255,255,0.08);
  border-radius: var(--radius-lg);
  padding: 32px;
}

.flow-step {
  display: flex;
  align-items: center;
  gap: 20px;
  padding: 16px 0;
  border-bottom: 1px solid rgba(255,255,255,0.06);
}

.flow-step:last-child {
  border-bottom: none;
}

.flow-icon {
  width: 48px;
  height: 48px;
  border-radius: var(--radius);
  background: var(--color-primary);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.1rem;
  font-weight: 800;
  flex-shrink: 0;
  color: white;
}

.flow-content h4 {
  font-size: 1rem;
  margin-bottom: 2px;
  color: white;
}

.flow-content p {
  font-size: 0.85rem;
  color: rgba(255,255,255,0.45);
}

.flow-arrow {
  text-align: center;
  padding: 4px 0 4px 24px;
  color: var(--color-primary-light);
  font-size: 1.2rem;
}

.principle-features {
  display: grid;
  gap: 16px;
}

.feature-card {
  background: var(--color-bg-dark-alt);
  border: 1px solid rgba(255,255,255,0.06);
  border-radius: var(--radius);
  padding: 24px;
  transition: all var(--transition);
}

.feature-card:hover {
  border-color: var(--color-primary);
  transform: translateX(4px);
}

.feature-card h4 {
  margin-bottom: 8px;
  display: flex;
  align-items: center;
  gap: 12px;
  color: white;
}

.feature-card p {
  font-size: 0.9rem;
  color: rgba(255,255,255,0.5);
}

.feature-icon {
  width: 36px;
  height: 36px;
  border-radius: var(--radius);
  background: rgba(220, 38, 38, 0.15);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--color-primary-light);
  font-size: 0.85rem;
  font-weight: 800;
}

/* ============================================
   ADVANTAGES — Light Section
   ============================================ */
.advantage-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1px;
  background: var(--color-border);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  overflow: hidden;
}

.advantage-card {
  background: white;
  padding: 32px;
  text-align: left;
  transition: all 0.3s cubic-bezier(0.16, 1, 0.3, 1);
  border-radius: 2px;
}

.advantage-card:hover {
  background: #fafafa;
  transform: translateY(-4px);
  box-shadow: 0 12px 40px rgba(0, 0, 0, 0.08);
}

.advantage-card:nth-child(1) { border-left: 3px solid var(--color-primary); }
.advantage-card:nth-child(2) { border-left: 3px solid var(--color-primary-light); }
.advantage-card:nth-child(3) { border-left: 3px solid var(--color-accent); }
.advantage-card:nth-child(4) { border-left: 3px solid var(--color-primary); }
.advantage-card:nth-child(5) { border-left: 3px solid var(--color-primary-light); }
.advantage-card:nth-child(6) { border-left: 3px solid var(--color-accent); }

.advantage-icon {
  display: none;
}

.advantage-card h3 {
  font-size: 1.1rem;
  margin-bottom: 8px;
}

.advantage-card p {
  font-size: 0.9rem;
  color: var(--color-text-muted);
  line-height: 1.6;
}

.advantage-highlight {
  color: var(--color-primary);
  font-weight: 700;
}

/* Comparison Table — Dark */
.comparison-section {
  background: var(--color-bg-dark-alt);
  border: 1px solid rgba(255,255,255,0.06);
  border-radius: var(--radius-lg);
  padding: 40px;
  margin-top: 48px;
  overflow-x: auto;
}

.comparison-section h3 {
  margin-bottom: 24px;
  text-align: center;
  color: white;
}

.comparison-table {
  width: 100%;
  border-collapse: collapse;
  min-width: 600px;
}

.comparison-table th,
.comparison-table td {
  padding: 14px 20px;
  text-align: left;
  border-bottom: 1px solid rgba(255,255,255,0.06);
}

.comparison-table th {
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 1px;
  color: rgba(255,255,255,0.35);
  font-weight: 600;
  background: transparent;
}

.comparison-table td {
  font-size: 0.9rem;
  color: rgba(255,255,255,0.6);
}

.comparison-table tr:last-child td {
  border-bottom: none;
}

.comparison-win {
  color: var(--color-primary-light);
  font-weight: 600;
}

/* ============================================
   CUTTING PARAMETERS — Light Section
   ============================================ */
.params-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 24px;
}

.params-card {
  background: white;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: 28px;
}

.params-card h3 {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 20px;
  padding-bottom: 16px;
  border-bottom: 1px solid var(--color-border);
}

.params-power {
  background: var(--color-primary);
  color: white;
  padding: 4px 12px;
  border-radius: 2px;
  font-size: 0.8rem;
  font-weight: 700;
  letter-spacing: 0.5px;
}

.params-table {
  width: 100%;
}

.params-table th,
.params-table td {
  padding: 10px 0;
  text-align: left;
  font-size: 0.9rem;
}

.params-table th {
  color: var(--color-text-dim);
  font-weight: 500;
}

.params-table td {
  text-align: right;
  color: var(--color-text-muted);
  font-variant-numeric: tabular-nums;
}

.params-note {
  margin-top: 16px;
  padding: 12px;
  background: var(--color-surface-2);
  border-radius: var(--radius);
  font-size: 0.85rem;
  color: var(--color-text-dim);
  border-left: 3px solid var(--color-primary);
}

/* ============================================
   CUTTING SAMPLES / GALLERY — Dark Section
   ============================================ */
.samples-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.sample-card {
  background: var(--color-bg-dark-alt);
  border: 1px solid rgba(255,255,255,0.06);
  border-radius: var(--radius-lg);
  overflow: hidden;
  transition: all 0.35s cubic-bezier(0.16, 1, 0.3, 1);
}

.sample-card:hover {
  transform: translateY(-6px);
  border-color: rgba(220, 38, 38, 0.3);
  box-shadow: 0 16px 48px rgba(0, 0, 0, 0.3);
}

.sample-video {
  width: 100%;
  aspect-ratio: 16/9;
  background: rgba(0,0,0,0.3);
  display: flex;
  align-items: center;
  justify-content: center;
  position: relative;
  overflow: hidden;
}

.video-embed {
  width: 100%;
  aspect-ratio: 16/9;
  overflow: hidden;
}

.video-embed iframe {
  width: 100%;
  height: 100%;
}

.sample-video img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.sample-play {
  position: absolute;
  width: 56px;
  height: 56px;
  background: var(--color-primary);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  color: white;
  font-size: 1.25rem;
  cursor: pointer;
  transition: all var(--transition);
}

.sample-play:hover {
  transform: scale(1.1);
  background: var(--color-primary-dark);
}

.sample-info {
  padding: 20px;
}

.sample-info h4 {
  font-size: 0.95rem;
  margin-bottom: 4px;
  color: white;
}

.sample-info p {
  font-size: 0.8rem;
  color: rgba(255,255,255,0.4);
}

.sample-tag {
  display: inline-block;
  background: rgba(220, 38, 38, 0.15);
  color: var(--color-primary-light);
  padding: 4px 10px;
  border-radius: 2px;
  font-size: 0.7rem;
  font-weight: 600;
  margin-top: 8px;
  letter-spacing: 0.5px;
  text-transform: uppercase;
}

/* ============================================
   REFERENCE / CUSTOMERS — Light Section
   ============================================ */
.reference-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 1px;
  background: var(--color-border);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  overflow: hidden;
}

.reference-card {
  background: white;
  padding: 32px;
}

.reference-card h3 {
  font-size: 1.05rem;
  margin-bottom: 8px;
}

.reference-card .location {
  color: var(--color-text-dim);
  font-size: 0.85rem;
  margin-bottom: 16px;
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.reference-card p {
  font-size: 0.9rem;
  color: var(--color-text-muted);
  line-height: 1.6;
}

.reference-goal {
  margin-top: 48px;
  text-align: center;
  padding: 48px 40px;
  background: var(--color-bg-dark);
  border-radius: var(--radius-lg);
}

.reference-goal h3 {
  font-size: 1.5rem;
  margin-bottom: 8px;
  color: white;
}

.reference-goal p {
  color: rgba(255,255,255,0.5);
}

/* ============================================
   CTA SECTION
   ============================================ */
.section-cta {
  background: var(--color-bg-dark);
  text-align: center;
  padding: 100px 0;
}

.section-cta h2 {
  color: white;
  margin-bottom: 16px;
}

.section-cta p {
  color: rgba(255,255,255,0.5);
  max-width: 600px;
  margin: 0 auto 32px;
}

/* ============================================
   CONTACT
   ============================================ */
.contact-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 48px;
}

.contact-info {
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.contact-item {
  display: flex;
  align-items: flex-start;
  gap: 16px;
  padding: 20px;
  background: white;
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  transition: all var(--transition);
}

.contact-item:hover {
  border-color: var(--color-primary);
}

.contact-icon {
  width: 44px;
  height: 44px;
  border-radius: var(--radius);
  background: var(--color-primary-glow);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--color-primary);
  font-size: 1.1rem;
  flex-shrink: 0;
}

.contact-item h4 {
  font-size: 0.85rem;
  margin-bottom: 2px;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  color: var(--color-text-dim);
}

.contact-item p {
  font-size: 1rem;
  color: var(--color-text);
}

.contact-item a {
  color: var(--color-primary);
}

.contact-form {
  background: white;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: 40px;
}

.contact-form h3 {
  margin-bottom: 24px;
}

.form-group {
  margin-bottom: 20px;
}

.form-group label {
  display: block;
  font-size: 0.85rem;
  font-weight: 600;
  margin-bottom: 8px;
  color: var(--color-text);
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.form-group input,
.form-group textarea,
.form-group select {
  width: 100%;
  padding: 14px 16px;
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  color: var(--color-text);
  font-size: 1rem;
  font-family: inherit;
  transition: all var(--transition);
}

.form-group input:focus,
.form-group textarea:focus,
.form-group select:focus {
  outline: none;
  border-color: var(--color-primary);
  box-shadow: 0 0 0 3px var(--color-primary-glow);
}

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

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

.form-submit {
  width: 100%;
  margin-top: 8px;
}

/* ============================================
   FOOTER — Dark
   ============================================ */
.footer {
  background: var(--color-bg-dark);
  padding: 48px 0 24px;
}

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

.footer-brand .logo-brand {
  color: white;
}

.footer-brand .logo-tagline {
  color: var(--color-primary-light);
}

.footer-brand p {
  margin-top: 16px;
  font-size: 0.9rem;
  max-width: 300px;
  color: rgba(255,255,255,0.5);
}

.footer h4 {
  font-size: 0.8rem;
  text-transform: uppercase;
  letter-spacing: 1.5px;
  color: rgba(255,255,255,0.35);
  margin-bottom: 16px;
  font-weight: 700;
}

.footer-links {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.footer-links a {
  color: rgba(255,255,255,0.55);
  font-size: 0.9rem;
}

.footer-links a:hover {
  color: white;
}

.footer-auth {
  background: rgba(255,255,255,0.05);
  border: 1px solid rgba(255,255,255,0.08);
  color: white;
  padding: 12px 16px;
  border-radius: var(--radius);
  margin-bottom: 12px;
  line-height: 1.5;
  display: inline-block;
}

.footer-auth-line {
  font-weight: 600;
  font-size: 0.8rem;
  letter-spacing: 0.3px;
  color: rgba(255,255,255,0.7);
}

.footer-auth-line + .footer-auth-line {
  margin-top: 2px;
}

.footer-auth-line a {
  color: rgba(255,255,255,0.6);
  font-weight: 400;
  font-size: 0.85rem;
}

.footer-auth-line a:hover {
  color: white;
}

.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: 0.8rem;
  color: rgba(255,255,255,0.25);
}

/* ============================================
   RESPONSIVE
   ============================================ */
@media (max-width: 1024px) {
  .hero-grid {
    grid-template-columns: 1fr;
    text-align: center;
  }

  .hero-subtitle {
    margin: 0 auto 32px;
  }

  .hero-stats {
    justify-content: center;
  }

  .hero-actions {
    justify-content: center;
  }

  .hero-visual {
    order: -1;
  }

  .hero-image {
    max-width: 400px;
  }

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

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

@media (max-width: 768px) {
  .nav {
    display: none;
  }

  .mobile-toggle {
    display: block;
  }

  .nav.open {
    display: flex;
    flex-direction: column;
    position: absolute;
    top: 72px;
    left: 0;
    right: 0;
    background: var(--color-bg-dark);
    border-bottom: 1px solid rgba(255,255,255,0.08);
    padding: 16px;
  }

  .nav.open a {
    color: rgba(255,255,255,0.7);
    padding: 12px 16px;
  }

  .hero-stats {
    flex-direction: column;
    gap: 16px;
  }

  .hero-stat {
    text-align: center;
  }

  .section {
    padding: 64px 0;
  }

  .advantage-grid {
    grid-template-columns: 1fr;
  }

  .comparison-section {
    padding: 24px;
  }

  .samples-grid {
    grid-template-columns: 1fr;
  }

  .reference-grid {
    grid-template-columns: 1fr;
  }

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

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

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

  .footer-bottom {
    flex-direction: column;
    gap: 12px;
    text-align: center;
  }

  .principle-grid {
    grid-template-columns: 1fr;
  }
}

/* ============================================
   ANIMATIONS
   ============================================ */
@keyframes fadeInUp {
  from {
    opacity: 0;
    transform: translateY(20px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.fade-in {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity 0.7s cubic-bezier(0.16, 1, 0.3, 1), transform 0.7s cubic-bezier(0.16, 1, 0.3, 1);
}

.fade-in.visible {
  opacity: 1;
  transform: translateY(0);
}

/* Staggered fade-in for grid children */
.advantage-grid .fade-in:nth-child(2) { transition-delay: 80ms; }
.advantage-grid .fade-in:nth-child(3) { transition-delay: 160ms; }
.advantage-grid .fade-in:nth-child(4) { transition-delay: 240ms; }
.advantage-grid .fade-in:nth-child(5) { transition-delay: 320ms; }
.advantage-grid .fade-in:nth-child(6) { transition-delay: 400ms; }

.samples-grid .fade-in:nth-child(2) { transition-delay: 80ms; }
.samples-grid .fade-in:nth-child(3) { transition-delay: 160ms; }

.pain-rows .fade-in:nth-child(2) { transition-delay: 100ms; }
.pain-rows .fade-in:nth-child(3) { transition-delay: 200ms; }

.faq-list .fade-in:nth-child(2) { transition-delay: 60ms; }
.faq-list .fade-in:nth-child(3) { transition-delay: 120ms; }
.faq-list .fade-in:nth-child(4) { transition-delay: 180ms; }

/* ============================================
   HEADER LOGO OVERRIDE
   ============================================ */
.header-inner .logo img {
  height: 40px;
}

/* ============================================
   ACCESSIBILITY
   ============================================ */
.skip-link {
  position: absolute;
  top: -100%;
  left: 16px;
  z-index: 999;
  padding: 12px 24px;
  background: var(--color-primary);
  color: white;
  border-radius: var(--radius);
  font-weight: 600;
  text-decoration: none;
}

.skip-link:focus {
  top: 16px;
}

a:focus-visible,
button:focus-visible,
input:focus-visible,
select:focus-visible,
textarea:focus-visible {
  outline: 2px solid var(--color-primary);
  outline-offset: 2px;
}

/* ============================================
   FORM SUCCESS STATE
   ============================================ */
#success-message {
  display: none;
  text-align: center;
  padding: 48px 24px;
}

#success-message:target {
  display: block;
}

#success-message h3 {
  color: var(--color-success);
  margin-bottom: 12px;
}

#success-message p {
  font-size: 1.1rem;
}

/* ============================================
   LANGUAGE SWITCHER
   ============================================ */
.lang-switch {
  position: relative;
}

.lang-btn {
  display: flex;
  align-items: center;
  gap: 6px;
  background: transparent;
  border: none;
  color: rgba(255,255,255,0.6);
  font-size: 0.85rem;
  font-weight: 500;
  padding: 12px 16px;
  cursor: pointer;
  transition: all var(--transition);
  letter-spacing: 0.3px;
}

.lang-btn:hover {
  color: #ffffff;
}

.lang-current {
  font-weight: 600;
}

.lang-sep {
  color: rgba(255,255,255,0.3);
  margin: 0 2px;
}

.lang-arrow {
  font-size: 0.6rem;
  opacity: 0.5;
  transition: transform 0.2s ease;
}

.lang-btn:hover .lang-arrow {
  opacity: 0.8;
}

.lang-dropdown {
  position: absolute;
  top: 100%;
  right: 0;
  margin-top: 0;
  background: var(--color-bg-dark);
  border: 1px solid rgba(255,255,255,0.1);
  border-radius: 8px;
  padding: 8px 0;
  min-width: 140px;
  display: none;
  z-index: 9999;
  box-shadow: 0 8px 32px rgba(0,0,0,0.5);
}

.lang-dropdown.show {
  display: block;
}

.lang-option {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 10px 18px;
  color: rgba(255,255,255,0.7);
  text-decoration: none;
  font-size: 0.85rem;
  transition: all 0.15s ease;
}

.lang-option:hover {
  background: rgba(255,255,255,0.05);
  color: #ffffff;
}

.lang-option.active {
  color: var(--color-primary);
  font-weight: 600;
}

.lang-option.active::after {
  content: "";
  width: 6px;
  height: 6px;
  background: var(--color-primary);
  border-radius: 50%;
}

/* Mobile: hide language switcher on mobile, show in footer instead */
@media (max-width: 900px) {
  .lang-switch {
    display: none;
  }
}

/* ============================================
   GLOBAL PRESENCE SECTION
   ============================================ */
.global-presence {
  background: radial-gradient(ellipse at 50% 0%, #1a2235 0%, #0a0f1c 60%, #050812 100%);
  padding: 110px 0 120px;
  position: relative;
  overflow: hidden;
}

.global-presence::before {
  content: '';
  position: absolute;
  inset: 0;
  background:
    radial-gradient(ellipse 40% 30% at 15% 20%, rgba(220,38,38,0.12), transparent),
    radial-gradient(ellipse 30% 30% at 85% 80%, rgba(245,158,11,0.08), transparent);
  pointer-events: none;
}

.global-presence .container {
  position: relative;
  z-index: 1;
}

.global-presence .section-label {
  color: #ef4444;
  letter-spacing: 4px;
}

.global-presence h2 {
  color: #ffffff;
  font-size: clamp(2rem, 4vw, 3rem);
  line-height: 1.1;
  margin-bottom: 20px;
}

.gp-accent {
  background: linear-gradient(90deg, #ef4444 0%, #f59e0b 100%);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  color: transparent;
}

.global-presence .section-header p {
  color: rgba(255,255,255,0.55);
  max-width: 650px;
  font-size: 1.05rem;
}

.globe-stage {
  position: relative;
  width: 100%;
  max-width: 600px;
  aspect-ratio: 1;
  margin: 48px auto 64px;
}

.globe-glow {
  position: absolute;
  inset: -10%;
  background: radial-gradient(circle at center, rgba(220,38,38,0.18) 0%, transparent 60%);
  filter: blur(40px);
  pointer-events: none;
}

.globe {
  position: relative;
  width: 100%;
  height: 100%;
  animation: globeFloat 8s ease-in-out infinite;
}

@keyframes globeFloat {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(-10px); }
}

.arc {
  stroke-dasharray: 4 6;
  animation: dashFlow 6s linear infinite;
}
.arc-2 { animation-duration: 8s; animation-direction: reverse; }
.arc-3 { animation-duration: 10s; }

@keyframes dashFlow {
  to { stroke-dashoffset: -40; }
}

.pulse-dot {
  position: absolute;
  width: 12px;
  height: 12px;
  background: #ef4444;
  border-radius: 50%;
  box-shadow: 0 0 12px rgba(239,68,68,0.8);
  transform: translate(-50%, -50%);
  z-index: 3;
}

.pulse-dot::before,
.pulse-dot::after {
  content: '';
  position: absolute;
  inset: 0;
  border-radius: 50%;
  border: 2px solid rgba(239,68,68,0.6);
  animation: pulseRing 2.2s ease-out infinite;
}

.pulse-dot::after {
  animation-delay: 1.1s;
}

.pulse-dot.mini {
  width: 6px;
  height: 6px;
  background: #f59e0b;
  box-shadow: 0 0 8px rgba(245,158,11,0.7);
}

.pulse-dot.mini::before,
.pulse-dot.mini::after {
  border-color: rgba(245,158,11,0.5);
}

@keyframes pulseRing {
  0% { transform: scale(1); opacity: 1; }
  100% { transform: scale(4); opacity: 0; }
}

.pulse-label {
  position: absolute;
  top: 50%;
  left: calc(100% + 12px);
  transform: translateY(-50%);
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: 2px;
  color: rgba(255,255,255,0.9);
  text-transform: uppercase;
  background: rgba(10,15,28,0.7);
  padding: 3px 8px;
  border-radius: 3px;
  border: 1px solid rgba(239,68,68,0.4);
  white-space: nowrap;
  pointer-events: none;
}

.presence-stats {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1px;
  background: rgba(255,255,255,0.08);
  border: 1px solid rgba(255,255,255,0.08);
  border-radius: 8px;
  overflow: hidden;
  margin-bottom: 48px;
}

.presence-stat {
  background: rgba(15,23,42,0.8);
  padding: 32px 24px;
  text-align: center;
  position: relative;
  transition: all 0.3s ease;
}

.presence-stat:hover {
  background: rgba(30,41,59,0.9);
}

.presence-stat.featured {
  background: linear-gradient(180deg, rgba(220,38,38,0.15), rgba(15,23,42,0.8));
}

.stat-num {
  font-size: clamp(2.2rem, 4vw, 3rem);
  font-weight: 800;
  background: linear-gradient(180deg, #ffffff 0%, #ef4444 120%);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  color: transparent;
  line-height: 1;
  letter-spacing: -1px;
  font-variant-numeric: tabular-nums;
}

.stat-num.static-num {
  background: linear-gradient(180deg, #ffffff 0%, #f59e0b 120%);
  -webkit-background-clip: text;
  background-clip: text;
}

.stat-label {
  margin-top: 10px;
  font-size: 0.75rem;
  color: rgba(255,255,255,0.5);
  text-transform: uppercase;
  letter-spacing: 1.5px;
  font-weight: 600;
}

.continents-row {
  display: flex;
  justify-content: center;
  gap: 12px;
  flex-wrap: wrap;
  margin-bottom: 64px;
}

.continent-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: rgba(255,255,255,0.03);
  border: 1px solid rgba(239,68,68,0.25);
  color: rgba(255,255,255,0.85);
  padding: 10px 18px;
  border-radius: 30px;
  font-size: 0.78rem;
  font-weight: 700;
  letter-spacing: 2px;
  transition: all 0.3s ease;
}

.continent-badge:hover {
  border-color: #ef4444;
  background: rgba(239,68,68,0.1);
  transform: translateY(-2px);
}

.continent-badge.upcoming {
  border-style: dashed;
  border-color: rgba(245,158,11,0.4);
  color: rgba(255,255,255,0.55);
}

.continent-badge.upcoming .cb-dot {
  background: #f59e0b;
}

.continent-badge small {
  font-size: 0.65rem;
  opacity: 0.7;
  margin-left: 2px;
  letter-spacing: 1px;
}

.cb-dot {
  width: 6px;
  height: 6px;
  background: #ef4444;
  border-radius: 50%;
  box-shadow: 0 0 6px currentColor;
}

.presence-cta {
  background: linear-gradient(135deg, rgba(220,38,38,0.15) 0%, rgba(245,158,11,0.08) 100%);
  border: 1px solid rgba(220,38,38,0.25);
  border-radius: 12px;
  padding: 40px;
}

.presence-cta-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 32px;
  flex-wrap: wrap;
}

.presence-cta h3 {
  color: #ffffff;
  font-size: 1.4rem;
  margin-bottom: 6px;
}

.presence-cta p {
  color: rgba(255,255,255,0.6);
  margin: 0;
  font-size: 0.95rem;
}

@media (max-width: 900px) {
  .presence-stats {
    grid-template-columns: repeat(2, 1fr);
  }
  .pulse-label {
    font-size: 0.62rem;
    padding: 2px 6px;
  }
}

@media (max-width: 600px) {
  .global-presence { padding: 80px 0; }
  .globe-stage { margin: 32px auto 48px; }
  .presence-cta { padding: 28px; text-align: center; }
  .presence-cta-inner { justify-content: center; text-align: center; }
}

/* ============================================
   ROI CALCULATOR SECTION
   ============================================ */
.roi-section {
  background: var(--color-bg-dark);
  padding: 100px 0;
  position: relative;
}

.roi-section::after {
  content: '';
  position: absolute;
  inset: 0;
  opacity: 0.03;
  pointer-events: none;
  background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 256 256' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='noise'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='4' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23noise)'/%3E%3C/svg%3E");
  background-repeat: repeat;
  background-size: 256px 256px;
}

.roi-section .section-label {
  color: var(--color-primary-light);
}

.roi-section h2,
.roi-section h4 {
  color: var(--color-text-inverse);
}

.roi-section p {
  color: var(--color-text-inverse-muted);
}

/* Calculator Container */
.roi-calculator {
  background: var(--color-bg-dark-alt);
  border: 1px solid rgba(255,255,255,0.06);
  border-radius: var(--radius-lg);
  padding: 40px 44px 44px;
  max-width: 800px;
  margin: 0 auto;
  position: relative;
}

.roi-label {
  display: block;
  font-size: 0.75rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 1.5px;
  color: rgba(255,255,255,0.45);
  margin-bottom: 12px;
}

/* Power Selector */
.roi-power-selector {
  margin-bottom: 32px;
}

.power-buttons {
  display: flex;
  gap: 10px;
  flex-wrap: wrap;
}

.power-btn {
  background: rgba(255,255,255,0.04);
  border: 1px solid rgba(255,255,255,0.08);
  color: rgba(255,255,255,0.55);
  padding: 10px 22px;
  border-radius: var(--radius);
  font-size: 0.95rem;
  font-weight: 600;
  cursor: pointer;
  transition: all var(--transition);
}

.power-btn:hover {
  border-color: var(--color-primary);
  color: var(--color-text-inverse);
  transform: translateY(-1px);
}

.power-btn.active {
  background: var(--color-primary);
  border-color: var(--color-primary);
  color: var(--color-text-inverse);
  box-shadow: 0 4px 12px rgba(220, 38, 38, 0.3);
}

/* Sliders */
.roi-slider-group {
  margin-bottom: 28px;
}

.roi-slider-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 12px;
}

.roi-value {
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--color-primary);
}

.roi-slider {
  width: 100%;
  height: 6px;
  -webkit-appearance: none;
  appearance: none;
  background: linear-gradient(to right, var(--color-primary) 0%, var(--color-primary) var(--slider-pct, 50%), rgba(255,255,255,0.08) var(--slider-pct, 50%));
  border-radius: var(--radius);
  outline: none;
  cursor: pointer;
}

.roi-slider::-webkit-slider-thumb {
  -webkit-appearance: none;
  appearance: none;
  width: 20px;
  height: 20px;
  background: var(--color-primary);
  border-radius: 50%;
  cursor: pointer;
  transition: transform 0.2s, box-shadow 0.2s;
  box-shadow: 0 2px 6px rgba(220, 38, 38, 0.3);
}

.roi-slider::-webkit-slider-thumb:hover {
  transform: scale(1.15);
}

.roi-slider::-moz-range-thumb {
  width: 20px;
  height: 20px;
  background: var(--color-primary);
  border-radius: 50%;
  cursor: pointer;
  border: none;
}

.slider-range {
  display: flex;
  justify-content: space-between;
  margin-top: 8px;
  font-size: 0.75rem;
  color: rgba(255,255,255,0.25);
}

.roi-warning {
  margin-top: 12px;
  padding: 10px 16px;
  background: rgba(220, 38, 38, 0.1);
  border: 1px solid rgba(220, 38, 38, 0.2);
  border-radius: var(--radius);
  color: var(--color-primary) !important;
  font-size: 0.85rem;
  display: none;
}

.roi-warning.show {
  display: block;
}

/* User Inputs */
.roi-inputs {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 20px;
  margin-bottom: 32px;
}

.roi-input-group {
  display: flex;
  flex-direction: column;
}

.roi-input {
  background: rgba(255,255,255,0.04);
  border: 1px solid rgba(255,255,255,0.1);
  border-radius: var(--radius);
  padding: 12px 14px;
  color: var(--color-text-inverse);
  font-size: 1rem;
  transition: all var(--transition);
}

.roi-input:focus {
  outline: none;
  border-color: var(--color-primary);
  box-shadow: 0 0 0 2px rgba(220, 38, 38, 0.15);
}

.roi-input-note {
  margin-top: 6px;
  font-size: 0.75rem;
  color: rgba(255,255,255,0.3);
}

/* ─── Results: Side-by-side comparison ───────────────────── */
.roi-results {
  display: flex;
  align-items: stretch;
  justify-content: center;
  gap: 0;
  margin-bottom: 28px;
}

.roi-result-card {
  flex: 1;
  max-width: 280px;
  padding: 24px 20px;
  text-align: center;
  transition: all var(--transition);
}

.roi-result-card.current {
  background: rgba(255,255,255,0.02);
  border: 1px solid rgba(255,255,255,0.06);
  border-radius: var(--radius-lg) 0 0 var(--radius-lg);
}

.roi-result-card.lishi {
  background: rgba(220, 38, 38, 0.04);
  border: 1px solid rgba(220, 38, 38, 0.15);
  border-left: none;
  border-radius: 0 var(--radius-lg) var(--radius-lg) 0;
}

/* Result badges */
.result-badge {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  font-size: 0.65rem;
  font-weight: 700;
  padding: 4px 12px;
  border-radius: var(--radius);
  text-transform: uppercase;
  letter-spacing: 1px;
  margin-bottom: 14px;
}

.current-badge {
  background: rgba(255,255,255,0.08);
  color: rgba(255,255,255,0.45);
}

.lishi-badge {
  background: rgba(220, 38, 38, 0.15);
  color: var(--color-primary);
}

.lishi-badge svg {
  margin-right: 1px;
}

.roi-result-card h4 {
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 1.5px;
  margin-bottom: 14px;
  color: rgba(255,255,255,0.4);
}

.roi-speed {
  display: flex;
  align-items: baseline;
  justify-content: center;
  gap: 4px;
}

.speed-value {
  font-size: 2.5rem;
  font-weight: 800;
  color: var(--color-text-inverse);
  line-height: 1;
}

.roi-result-card.lishi .speed-value {
  color: var(--color-primary);
}

.speed-unit {
  font-size: 0.9rem;
  color: rgba(255,255,255,0.35);
}

/* Speed bars */
.speed-bar-track {
  height: 4px;
  background: rgba(255,255,255,0.05);
  border-radius: 2px;
  margin: 14px 0 8px;
  overflow: hidden;
}

.speed-bar-fill {
  height: 100%;
  border-radius: 2px;
  width: 0%;
  transition: width 0.5s cubic-bezier(0.16, 1, 0.3, 1);
}

.current-bar {
  background: rgba(255,255,255,0.2);
}

.lishi-bar {
  background: var(--color-primary);
}

.roi-speed-label {
  font-size: 0.72rem;
  color: rgba(255,255,255,0.25);
}

/* VS divider between cards */
.roi-vs-badge {
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  width: 40px;
  z-index: 2;
}

.roi-vs-badge span {
  font-size: 0.7rem;
  font-weight: 700;
  color: rgba(255,255,255,0.2);
  letter-spacing: 1px;
  text-transform: uppercase;
}

/* ─── Annual Profit ──────────────────────────────────────── */
.roi-annual {
  background: rgba(220, 38, 38, 0.06);
  border: 1px solid rgba(220, 38, 38, 0.15);
  border-left: 3px solid var(--color-primary);
  border-radius: var(--radius);
  padding: 28px 24px;
  text-align: center;
  margin-bottom: 16px;
}

.roi-annual-glow {
  display: none;
}

.roi-annual-label {
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 2px;
  color: rgba(255,255,255,0.45);
  margin-bottom: 8px;
}

.roi-annual-value {
  font-size: 2.5rem;
  font-weight: 800;
  color: var(--color-primary);
  line-height: 1;
}

.roi-annual-sub {
  margin-top: 12px;
}

.roi-gas-pill {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  background: rgba(34, 197, 94, 0.08);
  border: 1px solid rgba(34, 197, 94, 0.15);
  border-radius: var(--radius);
  padding: 6px 14px;
  font-size: 0.8rem;
  color: rgba(255,255,255,0.6);
}

.roi-gas-value {
  color: var(--color-success);
  font-weight: 700;
}

.roi-annual-note {
  margin-top: 12px;
  font-size: 0.72rem;
  color: rgba(255,255,255,0.3) !important;
  max-width: 440px;
  margin-left: auto;
  margin-right: auto;
  line-height: 1.5;
}

/* Lead Capture */
.roi-lead-capture {
  background: rgba(255,255,255,0.02);
  border: 1px solid rgba(255,255,255,0.06);
  border-radius: var(--radius-lg);
  padding: 32px;
  text-align: center;
  margin-top: 28px;
}

.roi-lead-icon {
  width: 48px;
  height: 48px;
  background: rgba(220, 38, 38, 0.08);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto 16px;
  color: var(--color-primary);
}

.roi-lead-capture h4 {
  font-size: 1.15rem;
  margin-bottom: 8px;
}

.roi-lead-capture > p {
  font-size: 0.9rem;
  margin-bottom: 24px;
}

.roi-lead-form {
  display: flex;
  flex-direction: column;
  gap: 12px;
  max-width: 400px;
  margin: 0 auto 16px;
}

.roi-lead-note {
  font-size: 0.8rem;
  color: rgba(255,255,255,0.35);
}

.roi-lead-note a {
  color: var(--color-primary);
}

.roi-submit {
  width: 100%;
  justify-content: center;
}

/* Animations */
@keyframes profitPop {
  0% { transform: scale(1); }
  50% { transform: scale(1.04); }
  100% { transform: scale(1); }
}

.profit-animate {
  animation: profitPop 0.3s ease;
}

/* ============================================
   AIR PAIN POINTS — Two-Panel Comparison Rows
   ============================================ */
.air-pain-section {
  margin-top: 80px;
  padding-top: 80px;
  border-top: 1px solid rgba(255,255,255,0.06);
}

.air-pain-section .section-header {
  text-align: center;
  margin-bottom: 48px;
}

.air-pain-section .section-label {
  color: var(--color-primary-light);
}

.air-pain-section h2 {
  color: var(--color-text-inverse);
  font-size: 1.8rem;
  margin-bottom: 16px;
}

.air-pain-section > .section-header > p {
  color: var(--color-text-inverse-muted);
  font-size: 1rem;
  max-width: 600px;
  margin: 0 auto;
}

/* Pain Rows Container */
.pain-rows {
  display: flex;
  flex-direction: column;
  gap: 16px;
}

/* Individual Pain Row — full-width horizontal split */
.pain-row {
  display: flex;
  align-items: stretch;
  border-radius: var(--radius-lg);
  overflow: hidden;
  border: 1px solid rgba(255,255,255,0.06);
  transition: border-color var(--transition);
}

.pain-row:hover {
  border-color: rgba(255,255,255,0.1);
}

/* Left panel: Problem side */
.pain-row-left {
  flex: 45;
  background: rgba(220, 38, 38, 0.03);
  padding: 24px 24px 24px 28px;
  border-left: 3px solid rgba(220, 38, 38, 0.4);
}

/* Right panel: LISHI solution side */
.pain-row-right {
  flex: 55;
  background: rgba(34, 197, 94, 0.02);
  padding: 24px 28px 24px 24px;
}

/* Vertical divider between panels */
.pain-row-divider {
  width: 1px;
  background: rgba(255,255,255,0.06);
  flex-shrink: 0;
}

/* Row header */
.pain-row-header {
  display: flex;
  align-items: center;
  gap: 8px;
  margin-bottom: 14px;
}

.pain-row-icon {
  width: 32px;
  height: 32px;
  background: rgba(245, 158, 11, 0.08);
  border-radius: var(--radius);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--color-accent);
  flex-shrink: 0;
}

.pain-row-icon.danger-icon {
  background: rgba(220, 38, 38, 0.08);
  color: var(--color-primary);
}

.pain-row-icon.solution-icon {
  background: rgba(34, 197, 94, 0.08);
  color: var(--color-success);
}

.pain-row-header h3 {
  color: var(--color-text-inverse);
  font-size: 1rem;
  font-weight: 700;
  margin: 0;
}

/* Pain tag/badge */
.pain-tag {
  background: rgba(245, 158, 11, 0.1);
  color: var(--color-accent);
  font-size: 0.7rem;
  font-weight: 700;
  padding: 3px 10px;
  border-radius: var(--radius);
  letter-spacing: 1px;
  text-transform: uppercase;
  white-space: nowrap;
}

.pain-tag.danger {
  background: rgba(220, 38, 38, 0.1);
  color: var(--color-primary);
}

/* Pain list items with X icons */
.pain-list {
  list-style: none;
  padding: 0;
  margin: 0;
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.pain-list li {
  color: rgba(255,255,255,0.55);
  font-size: 0.88rem;
  line-height: 1.5;
  display: flex;
  align-items: flex-start;
  gap: 8px;
}

.icon-x {
  color: rgba(220, 38, 38, 0.6);
  font-size: 0.7rem;
  font-weight: 700;
  flex-shrink: 0;
  margin-top: 3px;
}

/* Solution text */
.pain-row-solution {
  color: rgba(255,255,255,0.65);
  font-size: 0.9rem;
  line-height: 1.6;
  margin: 0 0 8px;
}

.pain-row-cost {
  color: var(--color-success);
  font-size: 0.85rem;
  font-weight: 600;
  margin: 0;
}

/* Pain Summary */
.pain-summary {
  display: flex;
  align-items: center;
  gap: 16px;
  background: rgba(255,255,255,0.02);
  border: 1px solid rgba(255,255,255,0.06);
  border-left: 3px solid var(--color-success);
  border-radius: var(--radius);
  padding: 24px 28px;
  margin-top: 32px;
}

.summary-icon {
  width: 44px;
  height: 44px;
  background: rgba(34, 197, 94, 0.08);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  color: var(--color-success);
}

.summary-text h4 {
  color: var(--color-text-inverse);
  font-size: 1.05rem;
  margin-bottom: 4px;
}

.summary-text p {
  color: var(--color-text-inverse-muted);
  font-size: 0.88rem;
  margin: 0;
  line-height: 1.5;
}

/* ─── ROI & Pain Responsive ──────────────────────────────── */
@media (max-width: 768px) {
  .roi-calculator {
    padding: 32px 24px;
  }

  .roi-results {
    flex-direction: column;
    align-items: center;
  }

  .roi-result-card.current,
  .roi-result-card.lishi {
    max-width: 100%;
    width: 100%;
    border-radius: var(--radius-lg);
  }

  .roi-result-card.lishi {
    border-left: 1px solid rgba(220, 38, 38, 0.15);
  }

  .roi-vs-badge {
    width: auto;
    padding: 4px 0;
  }

  .roi-annual-value {
    font-size: 2rem;
  }

  .roi-inputs {
    grid-template-columns: 1fr;
  }

  .power-buttons {
    justify-content: center;
  }

  .power-btn {
    flex: 1;
    min-width: 70px;
    padding: 10px 14px;
    font-size: 0.88rem;
  }

  /* Pain rows: stack panels vertically on mobile */
  .pain-row {
    flex-direction: column;
  }

  .pain-row-left,
  .pain-row-right {
    flex: none;
  }

  .pain-row-left {
    border-left: none;
    border-top: 3px solid rgba(220, 38, 38, 0.4);
  }

  .pain-row-divider {
    width: 100%;
    height: 1px;
  }

  .pain-summary {
    flex-direction: column;
    text-align: center;
  }

  .pain-summary {
    border-left: 1px solid rgba(255,255,255,0.06);
    border-top: 3px solid var(--color-success);
  }

  .air-pain-section h2 {
    font-size: 1.4rem;
  }
}

/* ============================================
   FAQ Section
   ============================================ */

.faq-list {
  max-width: 800px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.faq-item {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: 12px;
  overflow: hidden;
  transition: border-color 0.3s ease, box-shadow 0.3s ease;
}

.faq-item:hover {
  border-color: rgba(220, 38, 38, 0.3);
}

.faq-item[open] {
  border-color: rgba(220, 38, 38, 0.4);
  box-shadow: 0 4px 24px rgba(0, 0, 0, 0.06);
}

.faq-question {
  padding: 20px 24px;
  font-size: 1.05rem;
  font-weight: 600;
  color: var(--color-text);
  cursor: pointer;
  display: flex;
  justify-content: space-between;
  align-items: center;
  list-style: none;
  transition: color 0.2s ease;
}

.faq-question::-webkit-details-marker {
  display: none;
}

.faq-question::after {
  content: '+';
  font-size: 1.4rem;
  font-weight: 300;
  color: var(--color-accent);
  transition: transform 0.3s ease;
  flex-shrink: 0;
  margin-left: 16px;
}

.faq-item[open] .faq-question::after {
  content: '−';
}

.faq-item[open] .faq-question {
  color: var(--color-accent);
}

.faq-answer {
  padding: 0 24px 20px;
}

.faq-answer p {
  color: var(--color-text-muted);
  line-height: 1.7;
  margin: 0;
  font-size: 0.95rem;
}

/* ============================================
   BLOG
   ============================================ */

/* Blog Header — matches section-dark / hero pattern */
.blog-header {
  background: var(--color-bg-dark);
  padding: 140px 0 64px;
  text-align: center;
  position: relative;
  overflow: hidden;
}

.blog-header::before {
  content: '';
  position: absolute;
  inset: 0;
  background:
    radial-gradient(ellipse 50% 40% at 30% 50%, rgba(220,38,38,0.1) 0%, transparent 60%),
    radial-gradient(ellipse 40% 50% at 70% 50%, rgba(245,158,11,0.06) 0%, transparent 50%);
  pointer-events: none;
}

.blog-header::after {
  content: '';
  position: absolute;
  inset: 0;
  opacity: 0.03;
  pointer-events: none;
  background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 256 256' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='noise'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='4' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23noise)'/%3E%3C/svg%3E");
  background-repeat: repeat;
  background-size: 256px 256px;
}

.blog-header .section-label {
  position: relative;
  z-index: 1;
}

.blog-header h1 {
  color: white;
  margin-bottom: 12px;
  position: relative;
  z-index: 1;
}

.blog-header p {
  color: rgba(255,255,255,0.55);
  max-width: 600px;
  margin: 0 auto;
  position: relative;
  z-index: 1;
}

.blog-header-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: rgba(255,255,255,0.06);
  border: 1px solid rgba(255,255,255,0.1);
  padding: 8px 16px;
  border-radius: 2px;
  font-size: 0.85rem;
  color: rgba(255,255,255,0.6);
  margin-bottom: 20px;
  position: relative;
  z-index: 1;
}

.blog-header-badge span {
  color: var(--color-primary-light);
  font-weight: 600;
}

/* Blog Section — light background, consistent with .section */
.blog-section {
  padding: 80px 0;
  background: var(--color-bg);
}

/* Category Filter Bar */
.blog-categories {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-bottom: 40px;
  justify-content: center;
}

.blog-category-pill {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  color: var(--color-text-muted);
  padding: 8px 18px;
  border-radius: 30px;
  font-size: 0.8rem;
  font-weight: 600;
  cursor: pointer;
  transition: all var(--transition);
  text-decoration: none;
  letter-spacing: 0.3px;
}

.blog-category-pill:hover,
.blog-category-pill.active {
  background: var(--color-primary);
  border-color: var(--color-primary);
  color: white;
}

/* Featured Post — full-width dark card */
.featured-post {
  background: var(--color-bg-dark);
  border: 1px solid rgba(255,255,255,0.08);
  border-left: 4px solid var(--color-primary);
  border-radius: var(--radius-lg);
  padding: 40px;
  margin-bottom: 48px;
  transition: all 0.35s cubic-bezier(0.16, 1, 0.3, 1);
  position: relative;
  overflow: hidden;
}

.featured-post::before {
  content: '';
  position: absolute;
  inset: 0;
  background: radial-gradient(ellipse at 80% 50%, rgba(220,38,38,0.06) 0%, transparent 60%);
  pointer-events: none;
}

.featured-post:hover {
  border-color: rgba(220,38,38,0.4);
  box-shadow: 0 8px 40px rgba(0,0,0,0.15);
  transform: translateY(-2px);
}

.featured-post .blog-post-meta {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 14px;
  font-size: 0.78rem;
  position: relative;
}

.featured-post h2 {
  font-size: 1.5rem;
  margin-bottom: 12px;
  line-height: 1.35;
  position: relative;
}

.featured-post h2 a {
  color: white;
  text-decoration: none;
  transition: color var(--transition);
}

.featured-post h2 a:hover {
  color: var(--color-primary-light);
}

.featured-post .blog-post-excerpt {
  color: rgba(255,255,255,0.5);
  font-size: 0.95rem;
  line-height: 1.65;
  margin-bottom: 20px;
  position: relative;
}

.featured-post .blog-post-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  position: relative;
}

.featured-post .blog-post-tag {
  background: rgba(255,255,255,0.06);
  color: rgba(255,255,255,0.5);
  border: 1px solid rgba(255,255,255,0.08);
  padding: 3px 9px;
  border-radius: 2px;
  font-size: 0.7rem;
  font-weight: 500;
  text-decoration: none;
  transition: all var(--transition);
}

.featured-post .blog-post-tag:hover {
  background: rgba(220,38,38,0.2);
  color: var(--color-primary-light);
  border-color: rgba(220,38,38,0.3);
}

.featured-badge {
  display: inline-block;
  background: var(--color-primary);
  color: white;
  font-size: 0.62rem;
  font-weight: 800;
  letter-spacing: 1.5px;
  padding: 4px 10px;
  border-radius: 2px;
  text-transform: uppercase;
}

/* Section Divider */
.blog-section-divider {
  display: flex;
  align-items: center;
  gap: 16px;
  margin-bottom: 32px;
}

.blog-section-divider h3 {
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--color-text);
  white-space: nowrap;
}

.blog-section-divider-line {
  flex: 1;
  height: 1px;
  background: linear-gradient(90deg, var(--color-border), transparent);
}

/* Blog Posts Grid */
.blog-posts {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 24px;
}

/* Blog Post Card — clean card, matches site card patterns */
.blog-post-card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: 28px;
  transition: all 0.3s cubic-bezier(0.16, 1, 0.3, 1);
  display: flex;
  flex-direction: column;
}

.blog-post-card:hover {
  border-color: rgba(220, 38, 38, 0.3);
  box-shadow: 0 8px 32px rgba(0,0,0,0.06);
  transform: translateY(-2px);
}

.blog-post-meta {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 12px;
  font-size: 0.78rem;
  color: var(--color-text-dim);
}

.blog-post-category {
  display: inline-block;
  background: var(--color-primary-glow);
  color: var(--color-primary);
  padding: 3px 10px;
  border-radius: 2px;
  font-size: 0.68rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.blog-post-date {
  color: var(--color-text-dim);
}

.blog-post-readtime {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  color: var(--color-text-dim);
  font-size: 0.72rem;
}

.blog-post-card h2 {
  font-size: 1.15rem;
  margin-bottom: 10px;
  line-height: 1.4;
}

.blog-post-card h2 a {
  color: var(--color-text);
  text-decoration: none;
  transition: color var(--transition);
}

.blog-post-card h2 a:hover {
  color: var(--color-primary);
}

.blog-post-excerpt {
  font-size: 0.88rem;
  color: var(--color-text-muted);
  line-height: 1.65;
  margin-bottom: 16px;
  flex: 1;
}

.blog-post-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  margin-top: auto;
}

.blog-post-tag {
  display: inline-block;
  background: var(--color-surface-2);
  color: var(--color-text-dim);
  padding: 3px 9px;
  border-radius: 2px;
  font-size: 0.7rem;
  font-weight: 500;
  text-decoration: none;
  transition: all var(--transition);
}

.blog-post-tag:hover {
  background: var(--color-primary-glow);
  color: var(--color-primary);
}

/* Blog CTA Banner — dark section, matches presence-cta pattern */
.blog-cta-banner {
  background: var(--color-bg-dark);
  border: 1px solid rgba(220,38,38,0.15);
  border-radius: 12px;
  padding: 48px 40px;
  margin-top: 56px;
  text-align: center;
  position: relative;
  overflow: hidden;
}

.blog-cta-banner::before {
  content: '';
  position: absolute;
  inset: 0;
  background: radial-gradient(ellipse at center, rgba(220,38,38,0.08) 0%, transparent 70%);
  pointer-events: none;
}

.blog-cta-banner h3 {
  color: white;
  font-size: 1.3rem;
  margin-bottom: 8px;
  position: relative;
}

.blog-cta-banner p {
  color: rgba(255,255,255,0.5);
  margin-bottom: 24px;
  position: relative;
  max-width: 480px;
  margin-left: auto;
  margin-right: auto;
  font-size: 0.95rem;
}

.blog-cta-banner .btn {
  position: relative;
}

/* Newsletter section */
.newsletter-section {
  padding: 80px 0;
  background: var(--color-bg-dark);
  position: relative;
  overflow: hidden;
}

.newsletter-section::before {
  content: '';
  position: absolute;
  inset: 0;
  background: radial-gradient(ellipse at center, rgba(220,38,38,0.06) 0%, transparent 70%);
  pointer-events: none;
}

.newsletter-section::after {
  content: '';
  position: absolute;
  inset: 0;
  opacity: 0.03;
  pointer-events: none;
  background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 256 256' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='noise'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='4' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23noise)'/%3E%3C/svg%3E");
  background-repeat: repeat;
  background-size: 256px 256px;
}

.newsletter-inner {
  max-width: 560px;
  margin: 0 auto;
  text-align: center;
  position: relative;
}

.newsletter-inner h2 {
  color: white;
  margin-bottom: 8px;
}

.newsletter-inner p {
  color: rgba(255,255,255,0.45);
  margin-bottom: 28px;
}

.newsletter-form {
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 12px;
  max-width: 460px;
  margin: 0 auto;
}

.newsletter-form input[type=email] {
  padding: 14px 18px;
  border: 1px solid rgba(255,255,255,0.1);
  border-radius: var(--radius-lg);
  background: rgba(255,255,255,0.04);
  color: white;
  font-size: 0.95rem;
  outline: none;
  transition: border-color var(--transition);
}

.newsletter-form input[type=email]:focus {
  border-color: var(--color-primary);
}

.newsletter-form input[type=email]::placeholder {
  color: rgba(255,255,255,0.25);
}

/* ===== ARTICLE REDESIGN ===== */

.article-page-hero {
  background: var(--color-bg-dark);
  padding: 140px 0 64px;
  position: relative;
  overflow: hidden;
}

.article-page-hero::before {
  content: '';
  position: absolute;
  inset: 0;
  background: radial-gradient(ellipse at 20% 50%, rgba(220,38,38,0.08) 0%, transparent 60%),
              radial-gradient(ellipse at 80% 50%, rgba(245,158,11,0.05) 0%, transparent 50%);
  pointer-events: none;
}

.article-page-hero .article-container {
  position: relative;
}

.article-page-hero .section-label {
  margin-bottom: 16px;
}

.article-page-hero h1 {
  color: white;
  font-size: clamp(1.8rem, 3.5vw, 2.6rem);
  margin-bottom: 16px;
  line-height: 1.3;
}

.article-page-hero .article-meta {
  color: rgba(255,255,255,0.4);
  font-size: 0.88rem;
  display: flex;
  align-items: center;
  gap: 12px;
  flex-wrap: wrap;
}

.article-page-hero .article-meta span {
  display: flex;
  align-items: center;
  gap: 6px;
}

/* Article Section */
.article-section {
  padding: 64px 0 80px;
  background: var(--color-bg);
}

.article-container {
  max-width: 750px;
  margin: 0 auto;
}

.article-body {
  font-size: 1rem;
  line-height: 1.8;
  color: var(--color-text-muted);
}

/* Dropcap on first paragraph */
.article-body > p:first-of-type::first-letter {
  float: left;
  font-size: 3.4em;
  font-weight: 800;
  line-height: 0.85;
  padding-right: 10px;
  color: var(--color-primary);
  font-family: 'Inter', sans-serif;
  margin-top: 4px;
}

.article-body h2 {
  font-size: 1.5rem;
  color: var(--color-text);
  margin-top: 48px;
  margin-bottom: 16px;
  padding-bottom: 10px;
  border-bottom: 1px solid var(--color-border);
}

.article-body h3 {
  font-size: 1.15rem;
  color: var(--color-text);
  margin-top: 32px;
  margin-bottom: 12px;
}

.article-body p {
  margin-bottom: 20px;
}

.article-body ul,
.article-body ol {
  margin-bottom: 24px;
  padding-left: 24px;
}

.article-body li {
  margin-bottom: 8px;
  color: var(--color-text-muted);
}

.article-body strong {
  color: var(--color-text);
  font-weight: 600;
}

.article-body a {
  color: var(--color-primary);
  text-decoration: underline;
  text-underline-offset: 2px;
  transition: color var(--transition);
}

.article-body a:hover {
  color: var(--color-primary-dark);
}

.article-body .btn {
  color: white;
  text-decoration: none;
  transition: background var(--transition), transform var(--transition), box-shadow var(--transition);
}

.article-body .btn:hover {
  color: white;
}

/* Article Callout */
.article-callout {
  background: linear-gradient(135deg, rgba(220,38,38,0.05), rgba(245,158,11,0.03));
  border-left: 3px solid var(--color-primary);
  border-radius: 0 var(--radius-lg) var(--radius-lg) 0;
  padding: 24px 28px;
  margin: 32px 0;
}

.article-callout h4 {
  display: flex;
  align-items: center;
  gap: 8px;
  color: var(--color-text);
  font-size: 1rem;
  margin-bottom: 8px;
}

.article-callout p {
  color: var(--color-text-muted);
  font-size: 0.92rem;
  margin-bottom: 0;
  line-height: 1.7;
}

/* Article Tables */
.article-table-wrap {
  overflow-x: auto;
  margin: 32px 0;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
}

.article-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.88rem;
}

.article-table th {
  background: var(--color-surface-2);
  padding: 14px 18px;
  text-align: left;
  font-size: 0.72rem;
  text-transform: uppercase;
  letter-spacing: 1px;
  color: var(--color-text-dim);
  font-weight: 700;
  border-bottom: 1px solid var(--color-border);
}

.article-table td {
  padding: 14px 18px;
  color: var(--color-text-muted);
  border-bottom: 1px solid var(--color-border);
}

.article-table tr:last-child td {
  border-bottom: none;
}

.article-table tr:hover td {
  background: var(--color-surface-2);
}

/* Article CTA Box */
.article-cta-box {
  background: var(--color-bg-dark);
  border-radius: 12px;
  padding: 48px 40px;
  text-align: center;
  margin: 48px 0;
  position: relative;
  overflow: hidden;
}

.article-cta-box::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: radial-gradient(ellipse at center, rgba(220,38,38,0.08) 0%, transparent 70%);
  pointer-events: none;
}

.article-cta-box h3 {
  color: white;
  margin-bottom: 8px;
  position: relative;
}

.article-cta-box p {
  color: rgba(255,255,255,0.5);
  margin-bottom: 24px;
  position: relative;
  max-width: 480px;
  margin-left: auto;
  margin-right: auto;
}

.article-cta-box .btn {
  justify-content: center;
  position: relative;
  color: #fff;
  text-decoration: none;
}

.article-cta-box .btn:hover {
  color: #fff;
}

/* Article Nav */
.article-nav {
  display: flex;
  justify-content: space-between;
  gap: 24px;
  margin-top: 48px;
  padding-top: 32px;
  border-top: 1px solid var(--color-border);
}

.article-nav-link {
  flex: 1;
  padding: 20px 24px;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  text-decoration: none;
  transition: all 0.3s ease;
}

.article-nav-link:hover {
  border-color: var(--color-primary);
  box-shadow: 0 4px 16px rgba(0,0,0,0.04);
}

.article-nav-link span {
  display: block;
  font-size: 0.7rem;
  text-transform: uppercase;
  letter-spacing: 1px;
  color: var(--color-text-dim);
  margin-bottom: 4px;
}

.article-nav-link strong {
  display: block;
  font-size: 0.92rem;
  color: var(--color-text);
  transition: color var(--transition);
}

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

.article-nav-link.next {
  text-align: right;
}

.article-nav-link.prev {
  text-align: left;
}

/* Article Hero Image */
.article-hero-img {
  width: 100%;
  border-radius: var(--radius-lg);
  border: 1px solid var(--color-border);
  margin-bottom: 32px;
}

/* Blog Responsive */
@media (max-width: 900px) {
  .blog-posts {
    grid-template-columns: 1fr;
  }

  .featured-post {
    padding: 28px;
  }

  .featured-post h2 {
    font-size: 1.25rem;
  }

  .blog-cta-banner {
    padding: 32px 24px;
  }

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

@media (max-width: 768px) {
  .blog-header {
    padding: 120px 0 40px;
  }

  .blog-section {
    padding: 48px 0;
  }

  .article-page-hero {
    padding: 120px 0 40px;
  }

  .article-section {
    padding: 40px 0 48px;
  }

  .article-cta-box {
    padding: 32px 24px;
  }

  .article-nav {
    flex-direction: column;
  }

  .article-nav-link.next {
    text-align: left;
  }

  .newsletter-section {
    padding: 48px 0;
  }

  .trust-bar {
    flex-wrap: wrap;
    justify-content: center;
    gap: 16px 24px;
    padding: 16px 20px;
    font-size: 0.85rem;
  }

  .whatsapp-float {
    width: 50px;
    height: 50px;
    bottom: 20px;
    right: 16px;
  }

  .whatsapp-float svg {
    width: 26px;
    height: 26px;
  }
}

/* =============================================
   WhatsApp Float Button
   ============================================= */
.whatsapp-float {
  position: fixed;
  bottom: 28px;
  right: 24px;
  z-index: 9999;
  width: 58px;
  height: 58px;
  background: #25D366;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 4px 16px rgba(37,211,102,0.4);
  transition: transform 0.2s, box-shadow 0.2s;
}

.whatsapp-float:hover {
  transform: scale(1.08);
  box-shadow: 0 6px 24px rgba(37,211,102,0.55);
}

.whatsapp-float svg {
  width: 30px;
  height: 30px;
  fill: white;
}

/* Pulse ring for visibility */
.whatsapp-float::after {
  content: '';
  position: absolute;
  inset: -4px;
  border-radius: 50%;
  border: 2px solid rgba(37,211,102,0.45);
  animation: wa-pulse 2s infinite;
}

@keyframes wa-pulse {
  0% { transform: scale(1); opacity: 1; }
  70% { transform: scale(1.25); opacity: 0; }
  100% { transform: scale(1.25); opacity: 0; }
}

/* =============================================
   ROI Lead Message (inline notification)
   ============================================= */
.roi-lead-msg {
  margin-top: 12px;
  padding: 12px 16px;
  border-radius: 8px;
  font-size: 0.9rem;
  display: none;
  line-height: 1.5;
}

.roi-lead-msg.show {
  display: block;
}

.roi-lead-msg.success {
  background: rgba(34,197,94,0.12);
  border: 1px solid rgba(34,197,94,0.35);
  color: #86efac;
}

.roi-lead-msg.error {
  background: rgba(239,68,68,0.12);
  border: 1px solid rgba(239,68,68,0.35);
  color: #fca5a5;
}

.roi-lead-msg a {
  color: #60a5fa;
  text-decoration: underline;
}

/* =============================================
   Trust Signal Bar
   ============================================= */
.trust-bar {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 20px 36px;
  flex-wrap: wrap;
  padding: 18px 32px;
  background: var(--color-bg-dark);
  border-bottom: 1px solid rgba(255,255,255,0.06);
  font-size: 0.9rem;
}

.trust-item {
  color: rgba(255,255,255,0.7);
  display: flex;
  align-items: center;
  gap: 6px;
  white-space: nowrap;
}

.trust-item .trust-icon {
  color: #22c55e;
  font-size: 0.85rem;
}

/* =============================================
   Price Anchor Hint
   ============================================= */
.price-hint {
  margin-top: 14px;
  font-size: 0.9rem;
  color: rgba(255,255,255,0.45);
  line-height: 1.5;
}

.price-hint strong {
  color: rgba(255,255,255,0.7);
}

/* =============================================
   Case Study Summary Cards
   ============================================= */
.case-studies-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 24px;
  margin-top: 40px;
}

.case-card {
  background: var(--color-bg-dark);
  border: 1px solid rgba(255,255,255,0.08);
  border-radius: 12px;
  padding: 28px;
  transition: border-color 0.2s;
}

.case-card:hover {
  border-color: rgba(220,38,38,0.3);
}

.case-card .case-stat {
  font-family: var(--font-heading);
  font-size: 2rem;
  font-weight: 800;
  color: var(--color-primary);
  line-height: 1.1;
  margin-bottom: 4px;
}

.case-card .case-stat-label {
  font-size: 0.85rem;
  color: rgba(255,255,255,0.45);
  margin-bottom: 16px;
}

.case-card h4 {
  color: white;
  margin-bottom: 8px;
}

.case-card p {
  color: rgba(255,255,255,0.55);
  font-size: 0.9rem;
  margin-bottom: 16px;
  line-height: 1.5;
}

.case-card .case-link {
  color: var(--color-primary);
  font-weight: 600;
  font-size: 0.9rem;
  text-decoration: none;
}

.case-card .case-link:hover {
  text-decoration: underline;
}