/* GEO Optimization Website - Design System */

/* ===== Design Tokens ===== */
:root {
  /* Colors */
  --white: #ffffff;
  --gray-50: #f9fafb;
  --gray-100: #f3f4f6;
  --gray-200: #e5e7eb;
  --gray-300: #d1d5db;
  --gray-400: #9ca3af;
  --gray-500: #6b7280;
  --gray-600: #4b5563;
  --gray-700: #374151;
  --gray-800: #1f2937;
  --gray-900: #111827;
  --black: #000000;
  
  /* Accent Colors */
  --optimization-blue: #2563eb;
  --optimization-blue-light: #dbeafe;
  --optimization-blue-dark: #1d4ed8;
  --ranking-green: #10b981;
  --ranking-green-light: #d1fae5;
  --ranking-green-dark: #059669;
  --premium-purple: #7c3aed;
  --premium-purple-light: #ede9fe;
  --danger-red: #dc2626;
  --danger-red-light: #fee2e2;
  
  /* Semantic Colors */
  --text-primary: #1f2937;
  --text-secondary: #6b7280;
  --text-muted: #9ca3af;
  --border-color: #e5e7eb;
  --border-light: #f3f4f6;
  
  /* Shadows - Vercel-style */
  --shadow-ring: 0 0 0 1px rgba(0, 0, 0, 0.08);
  --shadow-card: 0 0 0 1px rgba(0, 0, 0, 0.08), 0 2px 4px rgba(0, 0, 0, 0.04);
  --shadow-card-hover: 0 0 0 1px rgba(0, 0, 0, 0.12), 0 4px 8px rgba(0, 0, 0, 0.08);
  --shadow-button: 0 0 0 1px rgba(0, 0, 0, 0.08);
  
  /* Typography */
  --font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Helvetica Neue", Helvetica, Arial, sans-serif;
  --font-mono: ui-monospace, SFMono-Regular, "SF Mono", Menlo, Monaco, Consolas, "Liberation Mono", "Courier New", monospace;
  
  /* Spacing */
  --space-1: 4px;
  --space-2: 8px;
  --space-3: 12px;
  --space-4: 16px;
  --space-5: 20px;
  --space-6: 24px;
  --space-8: 32px;
  --space-10: 40px;
  --space-12: 48px;
  --space-16: 64px;
  --space-20: 80px;
  --space-24: 96px;
  
  /* Border Radius */
  --radius-sm: 4px;
  --radius-md: 6px;
  --radius-lg: 8px;
  --radius-xl: 12px;
  --radius-2xl: 16px;
  --radius-full: 9999px;
  
  /* Transitions */
  --transition-fast: 150ms ease;
  --transition-base: 200ms ease;
  --transition-slow: 300ms ease;
  
  /* Container */
  --container-max: 1200px;
  --container-padding: 24px;
}

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

html {
  font-size: 16px;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-sans);
  font-size: 1rem;
  line-height: 1.6;
  color: var(--text-primary);
  background-color: var(--white);
}

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

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

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

ul, ol {
  list-style: none;
}

button {
  font-family: inherit;
  cursor: pointer;
  border: none;
  background: none;
}

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

/* ===== Typography ===== */
h1, h2, h3, h4, h5, h6 {
  font-weight: 600;
  line-height: 1.2;
  color: var(--text-primary);
}

h1 {
  font-size: 3rem;
  letter-spacing: -0.02em;
}

h2 {
  font-size: 2.25rem;
  letter-spacing: -0.02em;
}

h3 {
  font-size: 1.5rem;
}

h4 {
  font-size: 1.25rem;
}

.text-hero {
  font-size: 3rem;
  font-weight: 600;
  letter-spacing: -0.02em;
  line-height: 1.1;
}

.text-section {
  font-size: 2.25rem;
  font-weight: 600;
  letter-spacing: -0.02em;
  line-height: 1.2;
}

.text-card-title {
  font-size: 1.25rem;
  font-weight: 600;
  letter-spacing: -0.01em;
}

.text-body {
  font-size: 1rem;
  line-height: 1.6;
}

.text-small {
  font-size: 0.875rem;
  line-height: 1.5;
}

.text-caption {
  font-size: 0.75rem;
  line-height: 1.4;
}

.text-muted {
  color: var(--text-secondary);
}

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

/* ===== Layout ===== */
.container {
  width: 100%;
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 var(--container-padding);
}

.section {
  padding: var(--space-20) 0;
}

.section-sm {
  padding: var(--space-12) 0;
}

.grid {
  display: grid;
  gap: var(--space-6);
}

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

.grid-3 {
  grid-template-columns: repeat(3, 1fr);
}

.grid-4 {
  grid-template-columns: repeat(4, 1fr);
}

.flex {
  display: flex;
}

.flex-center {
  display: flex;
  align-items: center;
  justify-content: center;
}

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

.gap-2 {
  gap: var(--space-2);
}

.gap-3 {
  gap: var(--space-3);
}

.gap-4 {
  gap: var(--space-4);
}

.gap-6 {
  gap: var(--space-6);
}

.gap-8 {
  gap: var(--space-8);
}

/* ===== Navigation ===== */
.navbar {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  background: rgba(255, 255, 255, 0.95);
  backdrop-filter: blur(8px);
  border-bottom: var(--shadow-ring);
}

.navbar-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 64px;
}

.navbar-logo {
  font-size: 1.125rem;
  font-weight: 700;
  color: var(--text-primary);
  display: flex;
  align-items: center;
  gap: var(--space-2);
}

.navbar-logo svg {
  width: 28px;
  height: 28px;
}

.navbar-nav {
  display: flex;
  align-items: center;
  gap: var(--space-8);
}

.navbar-link {
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--text-secondary);
  transition: color var(--transition-fast);
  position: relative;
}

.navbar-link:hover,
.navbar-link.active {
  color: var(--text-primary);
}

.navbar-link.active::after {
  content: '';
  position: absolute;
  bottom: -4px;
  left: 0;
  right: 0;
  height: 2px;
  background: var(--optimization-blue);
  border-radius: var(--radius-full);
}

.navbar-cta {
  display: flex;
  align-items: center;
  gap: var(--space-3);
}

.mobile-menu-btn {
  display: none;
  width: 40px;
  height: 40px;
  align-items: center;
  justify-content: center;
  border-radius: var(--radius-md);
  transition: background var(--transition-fast);
}

.mobile-menu-btn:hover {
  background: var(--gray-100);
}

/* Mobile Navigation */
@media (max-width: 768px) {
  .navbar-nav {
    display: none;
    position: absolute;
    top: 64px;
    left: 0;
    right: 0;
    background: var(--white);
    flex-direction: column;
    padding: var(--space-4);
    gap: var(--space-4);
    border-bottom: var(--shadow-ring);
  }
  
  .navbar-nav.open {
    display: flex;
  }
  
  .mobile-menu-btn {
    display: flex;
  }
  
  .navbar-cta .btn {
    display: none;
  }
}

/* ===== Buttons ===== */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  padding: 10px 20px;
  font-size: 0.875rem;
  font-weight: 500;
  border-radius: var(--radius-md);
  transition: all var(--transition-fast);
  white-space: nowrap;
}

.btn svg {
  width: 16px;
  height: 16px;
}

.btn-primary {
  background: var(--optimization-blue);
  color: var(--white);
  box-shadow: var(--shadow-button);
}

.btn-primary:hover {
  background: var(--optimization-blue-dark);
  color: var(--white);
}

.btn-secondary {
  background: var(--white);
  color: var(--text-primary);
  box-shadow: var(--shadow-ring);
}

.btn-secondary:hover {
  background: var(--gray-50);
  color: var(--text-primary);
}

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

.btn-green:hover {
  background: var(--ranking-green-dark);
  color: var(--white);
}

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

.btn-outline:hover {
  background: var(--gray-50);
  color: var(--text-primary);
}

.btn-lg {
  padding: 14px 28px;
  font-size: 1rem;
}

.btn-sm {
  padding: 6px 12px;
  font-size: 0.75rem;
}

.btn-block {
  width: 100%;
}

/* ===== Cards ===== */
.card {
  background: var(--white);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-card);
  padding: var(--space-6);
  transition: box-shadow var(--transition-base), transform var(--transition-base);
}

.card:hover {
  box-shadow: var(--shadow-card-hover);
}

.card-header {
  margin-bottom: var(--space-4);
}

.card-title {
  font-size: 1.125rem;
  font-weight: 600;
  margin-bottom: var(--space-2);
}

.card-description {
  font-size: 0.875rem;
  color: var(--text-secondary);
}

.card-body {
  color: var(--text-secondary);
  font-size: 0.875rem;
}

.card-icon {
  width: 48px;
  height: 48px;
  border-radius: var(--radius-lg);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: var(--space-4);
}

.card-icon svg {
  width: 24px;
  height: 24px;
}

.card-icon-blue {
  background: var(--optimization-blue-light);
  color: var(--optimization-blue);
}

.card-icon-green {
  background: var(--ranking-green-light);
  color: var(--ranking-green);
}

.card-icon-purple {
  background: var(--premium-purple-light);
  color: var(--premium-purple);
}

/* ===== Badges ===== */
.badge {
  display: inline-flex;
  align-items: center;
  padding: 4px 10px;
  font-size: 0.75rem;
  font-weight: 500;
  border-radius: var(--radius-full);
}

.badge-blue {
  background: var(--optimization-blue-light);
  color: var(--optimization-blue);
}

.badge-green {
  background: var(--ranking-green-light);
  color: var(--ranking-green);
}

.badge-purple {
  background: var(--premium-purple-light);
  color: var(--premium-purple);
}

.badge-recommended {
  background: var(--ranking-green);
  color: var(--white);
}

.badge-premium {
  background: var(--premium-purple);
  color: var(--white);
}

/* ===== Hero Section ===== */
.hero {
  padding-top: 160px;
  padding-bottom: var(--space-20);
  text-align: center;
}

.hero-title {
  font-size: 3.5rem;
  font-weight: 700;
  letter-spacing: -0.03em;
  line-height: 1.1;
  margin-bottom: var(--space-6);
}

.hero-subtitle {
  font-size: 1.25rem;
  color: var(--text-secondary);
  max-width: 600px;
  margin: 0 auto var(--space-8);
  line-height: 1.7;
}

.hero-features {
  display: flex;
  justify-content: center;
  gap: var(--space-8);
  margin-bottom: var(--space-10);
  flex-wrap: wrap;
}

.hero-feature {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  font-size: 0.875rem;
  color: var(--text-secondary);
}

.hero-feature svg {
  width: 16px;
  height: 16px;
  color: var(--ranking-green);
}

.hero-actions {
  display: flex;
  justify-content: center;
  gap: var(--space-4);
  flex-wrap: wrap;
}

/* ===== Page Header ===== */
.page-header {
  padding-top: 120px;
  padding-bottom: var(--space-12);
  text-align: center;
  border-bottom: 1px solid var(--border-light);
}

.page-title {
  font-size: 2.5rem;
  font-weight: 700;
  letter-spacing: -0.02em;
  margin-bottom: var(--space-3);
}

.page-subtitle {
  font-size: 1.125rem;
  color: var(--text-secondary);
}

/* ===== Value Cards ===== */
.value-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: var(--space-6);
}

.value-card {
  padding: var(--space-8);
  border-radius: var(--radius-xl);
  background: var(--gray-50);
}

.value-card-blue {
  border-left: 4px solid var(--optimization-blue);
}

.value-card-green {
  border-left: 4px solid var(--ranking-green);
}

.value-card-title {
  font-size: 1.25rem;
  font-weight: 600;
  margin-bottom: var(--space-4);
  display: flex;
  align-items: center;
  gap: var(--space-2);
}

.value-card-title svg {
  width: 20px;
  height: 20px;
}

.value-list {
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
}

.value-list-item {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  font-size: 0.9375rem;
  color: var(--text-secondary);
}

.value-list-item svg {
  width: 16px;
  height: 16px;
  flex-shrink: 0;
}

.value-list-item.blue svg {
  color: var(--optimization-blue);
}

.value-list-item.green svg {
  color: var(--ranking-green);
}

/* ===== Service Cards ===== */
.service-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: var(--space-6);
}

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

@media (max-width: 640px) {
  .service-grid {
    grid-template-columns: 1fr;
  }
}

.service-card {
  text-align: center;
  padding: var(--space-8);
}

.service-icon {
  width: 56px;
  height: 56px;
  border-radius: var(--radius-xl);
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto var(--space-4);
}

.service-icon svg {
  width: 28px;
  height: 28px;
}

.service-title {
  font-size: 1.125rem;
  font-weight: 600;
  margin-bottom: var(--space-2);
}

.service-description {
  font-size: 0.875rem;
  color: var(--text-secondary);
  line-height: 1.6;
}

/* ===== Comparison Cards ===== */
.comparison-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: var(--space-6);
}

@media (max-width: 768px) {
  .comparison-grid {
    grid-template-columns: 1fr;
  }
}

.comparison-card {
  padding: var(--space-8);
  border-radius: var(--radius-xl);
}

.comparison-card.before {
  background: var(--gray-50);
  border: 1px solid var(--border-color);
}

.comparison-card.after {
  background: linear-gradient(135deg, rgba(37, 99, 235, 0.05), rgba(16, 185, 129, 0.05));
  border: 1px solid var(--ranking-green);
}

.comparison-label {
  font-size: 0.75rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin-bottom: var(--space-4);
  display: flex;
  align-items: center;
  gap: var(--space-2);
}

.comparison-card.before .comparison-label {
  color: var(--text-muted);
}

.comparison-card.after .comparison-label {
  color: var(--ranking-green);
}

.comparison-label svg {
  width: 16px;
  height: 16px;
}

.comparison-title {
  font-size: 1.25rem;
  font-weight: 600;
  margin-bottom: var(--space-6);
}

.comparison-list {
  display: flex;
  flex-direction: column;
  gap: var(--space-4);
}

.comparison-item {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: var(--space-3) 0;
  border-bottom: 1px solid var(--border-light);
}

.comparison-item:last-child {
  border-bottom: none;
}

.comparison-item-label {
  font-size: 0.875rem;
  color: var(--text-secondary);
}

.comparison-item-value {
  font-size: 0.875rem;
  font-weight: 500;
}

.comparison-card.before .comparison-item-value {
  color: var(--text-muted);
}

.comparison-card.after .comparison-item-value {
  color: var(--ranking-green);
}

/* ===== Stats Section ===== */
.stats-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: var(--space-6);
}

@media (max-width: 768px) {
  .stats-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

.stat-card {
  text-align: center;
  padding: var(--space-8);
  background: var(--white);
  border-radius: var(--radius-xl);
  box-shadow: var(--shadow-card);
}

.stat-value {
  font-size: 3rem;
  font-weight: 700;
  letter-spacing: -0.02em;
  background: linear-gradient(135deg, var(--optimization-blue), var(--ranking-green));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  margin-bottom: var(--space-2);
}

.stat-label {
  font-size: 0.875rem;
  color: var(--text-secondary);
}

/* ===== Pricing Cards ===== */
.pricing-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-6);
  align-items: stretch;
}

@media (max-width: 1024px) {
  .pricing-grid {
    grid-template-columns: 1fr;
    max-width: 480px;
    margin: 0 auto;
  }
}

.pricing-card {
  padding: var(--space-8);
  border-radius: var(--radius-xl);
  background: var(--white);
  box-shadow: var(--shadow-card);
  display: flex;
  flex-direction: column;
  position: relative;
  border: 2px solid transparent;
}

.pricing-card.featured {
  border-color: var(--ranking-green);
  transform: scale(1.02);
  box-shadow: 0 0 0 2px var(--ranking-green), var(--shadow-card-hover);
}

.pricing-card.premium {
  border-color: var(--premium-purple);
}

.pricing-badge {
  position: absolute;
  top: -12px;
  left: 50%;
  transform: translateX(-50%);
  padding: 4px 16px;
  border-radius: var(--radius-full);
  font-size: 0.75rem;
  font-weight: 600;
}

.pricing-badge.recommended {
  background: var(--ranking-green);
  color: var(--white);
}

.pricing-badge.premium {
  background: var(--premium-purple);
  color: var(--white);
}

.pricing-name {
  font-size: 1.25rem;
  font-weight: 600;
  margin-bottom: var(--space-2);
}

.pricing-tagline {
  font-size: 0.875rem;
  color: var(--text-secondary);
  margin-bottom: var(--space-4);
}

.pricing-price {
  margin-bottom: var(--space-6);
}

.pricing-amount {
  font-size: 3rem;
  font-weight: 700;
  letter-spacing: -0.02em;
}

.pricing-currency {
  font-size: 1.5rem;
  font-weight: 600;
  vertical-align: top;
}

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

.pricing-features {
  flex: 1;
  margin-bottom: var(--space-6);
}

.pricing-features-list {
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
}

.pricing-feature {
  display: flex;
  align-items: flex-start;
  gap: var(--space-3);
  font-size: 0.875rem;
  color: var(--text-secondary);
}

.pricing-feature svg {
  width: 16px;
  height: 16px;
  flex-shrink: 0;
  margin-top: 2px;
  color: var(--ranking-green);
}

.pricing-feature.disabled {
  color: var(--text-muted);
}

.pricing-feature.disabled svg {
  color: var(--text-muted);
}

/* ===== FAQ ===== */
.faq-list {
  max-width: 800px;
  margin: 0 auto;
}

.faq-item {
  border-bottom: 1px solid var(--border-color);
}

.faq-question {
  width: 100%;
  padding: var(--space-5) 0;
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-size: 1rem;
  font-weight: 500;
  color: var(--text-primary);
  text-align: left;
  cursor: pointer;
}

.faq-question:hover {
  color: var(--optimization-blue);
}

.faq-question svg {
  width: 20px;
  height: 20px;
  transition: transform var(--transition-fast);
}

.faq-item.open .faq-question svg {
  transform: rotate(180deg);
}

.faq-answer {
  max-height: 0;
  overflow: hidden;
  transition: max-height var(--transition-base), padding var(--transition-base);
}

.faq-item.open .faq-answer {
  max-height: 300px;
  padding-bottom: var(--space-5);
}

.faq-answer-content {
  font-size: 0.9375rem;
  color: var(--text-secondary);
  line-height: 1.7;
}

/* ===== CTA Section ===== */
.cta-section {
  background: linear-gradient(135deg, rgba(37, 99, 235, 0.05), rgba(16, 185, 129, 0.05));
  border-radius: var(--radius-2xl);
  padding: var(--space-12);
  text-align: center;
}

.cta-title {
  font-size: 1.75rem;
  font-weight: 600;
  margin-bottom: var(--space-3);
}

.cta-description {
  font-size: 1rem;
  color: var(--text-secondary);
  margin-bottom: var(--space-6);
}

.cta-buttons {
  display: flex;
  justify-content: center;
  gap: var(--space-4);
  flex-wrap: wrap;
}

/* ===== Contact ===== */
.contact-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-12);
}

@media (max-width: 768px) {
  .contact-grid {
    grid-template-columns: 1fr;
  }
}

.contact-info {
  display: flex;
  flex-direction: column;
  gap: var(--space-8);
}

.contact-item {
  display: flex;
  align-items: flex-start;
  gap: var(--space-4);
}

.contact-item-icon {
  width: 48px;
  height: 48px;
  border-radius: var(--radius-lg);
  background: var(--optimization-blue-light);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}

.contact-item-icon svg {
  width: 24px;
  height: 24px;
  color: var(--optimization-blue);
}

.contact-item-content h4 {
  font-size: 1rem;
  font-weight: 600;
  margin-bottom: var(--space-1);
}

.contact-item-content p {
  font-size: 0.875rem;
  color: var(--text-secondary);
}

.contact-qr {
  background: var(--white);
  border-radius: var(--radius-xl);
  box-shadow: var(--shadow-card);
  padding: var(--space-8);
  text-align: center;
}

.contact-qr img {
  width: 200px;
  height: 200px;
  margin: 0 auto var(--space-4);
  border-radius: var(--radius-lg);
}

.contact-qr-title {
  font-size: 1rem;
  font-weight: 600;
  margin-bottom: var(--space-1);
}

.contact-qr-subtitle {
  font-size: 0.875rem;
  color: var(--text-secondary);
}

/* ===== Footer ===== */
.footer {
  background: var(--gray-50);
  border-top: 1px solid var(--border-color);
  padding: var(--space-12) 0;
  margin-top: var(--space-20);
}

.footer-inner {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: var(--space-6);
}

.footer-info {
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
}

.footer-logo {
  font-size: 1rem;
  font-weight: 600;
  color: var(--text-primary);
  display: flex;
  align-items: center;
  gap: var(--space-2);
}

.footer-logo svg {
  width: 24px;
  height: 24px;
}

.footer-contact {
  font-size: 0.875rem;
  color: var(--text-secondary);
}

.footer-copyright {
  font-size: 0.75rem;
  color: var(--text-muted);
}

.footer-links {
  display: flex;
  gap: var(--space-6);
}

.footer-link {
  font-size: 0.875rem;
  color: var(--text-secondary);
}

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

/* ===== Process Flow ===== */
.process-flow {
  display: flex;
  justify-content: space-between;
  align-items: center;
  position: relative;
  padding: var(--space-8) 0;
}

.process-flow::before {
  content: '';
  position: absolute;
  top: 50%;
  left: 60px;
  right: 60px;
  height: 2px;
  background: var(--border-color);
  transform: translateY(-50%);
  z-index: 0;
}

.process-step {
  position: relative;
  z-index: 1;
  text-align: center;
  background: var(--white);
  padding: 0 var(--space-4);
}

.process-number {
  width: 48px;
  height: 48px;
  border-radius: 50%;
  background: var(--optimization-blue);
  color: var(--white);
  font-size: 1.25rem;
  font-weight: 600;
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto var(--space-3);
}

.process-title {
  font-size: 1rem;
  font-weight: 600;
  margin-bottom: var(--space-1);
}

.process-description {
  font-size: 0.75rem;
  color: var(--text-secondary);
}

@media (max-width: 768px) {
  .process-flow {
    flex-direction: column;
    gap: var(--space-6);
  }
  
  .process-flow::before {
    top: 24px;
    bottom: 24px;
    left: 50%;
    right: auto;
    width: 2px;
    height: auto;
    transform: translateX(-50%);
  }
}

/* ===== Case Studies ===== */
.case-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: var(--space-6);
}

@media (max-width: 768px) {
  .case-grid {
    grid-template-columns: 1fr;
  }
}

.case-card {
  background: var(--white);
  border-radius: var(--radius-xl);
  box-shadow: var(--shadow-card);
  overflow: hidden;
  transition: box-shadow var(--transition-base);
}

.case-card:hover {
  box-shadow: var(--shadow-card-hover);
}

.case-card-header {
  padding: var(--space-6);
  background: linear-gradient(135deg, rgba(37, 99, 235, 0.05), rgba(16, 185, 129, 0.05));
}

.case-card-tag {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  font-size: 0.75rem;
  font-weight: 500;
  color: var(--ranking-green);
  margin-bottom: var(--space-3);
}

.case-card-tag svg {
  width: 14px;
  height: 14px;
}

.case-card-title {
  font-size: 1.125rem;
  font-weight: 600;
}

.case-card-body {
  padding: var(--space-6);
}

.case-stats {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-4);
  margin-bottom: var(--space-4);
}

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

.case-stat-value {
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--ranking-green);
}

.case-stat-label {
  font-size: 0.75rem;
  color: var(--text-muted);
}

.case-card-description {
  font-size: 0.875rem;
  color: var(--text-secondary);
  line-height: 1.6;
}

/* ===== Guarantees ===== */
.guarantee-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-6);
}

@media (max-width: 768px) {
  .guarantee-grid {
    grid-template-columns: 1fr;
  }
}

.guarantee-card {
  background: var(--white);
  border-radius: var(--radius-xl);
  box-shadow: var(--shadow-card);
  padding: var(--space-6);
  text-align: center;
}

.guarantee-icon {
  width: 56px;
  height: 56px;
  border-radius: 50%;
  background: var(--ranking-green-light);
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto var(--space-4);
}

.guarantee-icon svg {
  width: 28px;
  height: 28px;
  color: var(--ranking-green);
}

.guarantee-title {
  font-size: 1rem;
  font-weight: 600;
  margin-bottom: var(--space-2);
}

.guarantee-description {
  font-size: 0.875rem;
  color: var(--text-secondary);
}

/* ===== Ranking Factors ===== */
.factors-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: var(--space-6);
}

@media (max-width: 768px) {
  .factors-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

.factor-card {
  background: var(--white);
  border-radius: var(--radius-xl);
  box-shadow: var(--shadow-card);
  padding: var(--space-6);
  text-align: center;
  position: relative;
}

.factor-percentage {
  font-size: 2.5rem;
  font-weight: 700;
  color: var(--optimization-blue);
  margin-bottom: var(--space-2);
}

.factor-title {
  font-size: 1rem;
  font-weight: 600;
  margin-bottom: var(--space-1);
}

.factor-description {
  font-size: 0.75rem;
  color: var(--text-muted);
}

/* ===== Discount Banner ===== */
.discount-banner {
  background: linear-gradient(135deg, var(--optimization-blue), var(--premium-purple));
  border-radius: var(--radius-xl);
  padding: var(--space-8);
  color: var(--white);
  text-align: center;
}

.discount-title {
  font-size: 1.5rem;
  font-weight: 600;
  margin-bottom: var(--space-4);
}

.discount-options {
  display: flex;
  justify-content: center;
  gap: var(--space-8);
  flex-wrap: wrap;
}

.discount-option {
  background: rgba(255, 255, 255, 0.15);
  border-radius: var(--radius-lg);
  padding: var(--space-4) var(--space-6);
}

.discount-badge {
  font-size: 0.75rem;
  font-weight: 600;
  background: var(--white);
  color: var(--optimization-blue);
  padding: 2px 8px;
  border-radius: var(--radius-full);
  margin-bottom: var(--space-2);
  display: inline-block;
}

.discount-price {
  font-size: 1.25rem;
  font-weight: 600;
}

.discount-save {
  font-size: 0.75rem;
  opacity: 0.9;
}

/* ===== Section Headers ===== */
.section-header {
  text-align: center;
  max-width: 700px;
  margin: 0 auto var(--space-12);
}

.section-header-full {
  text-align: left;
  margin: 0 0 var(--space-8);
}

.section-tag {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  font-size: 0.75rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--optimization-blue);
  margin-bottom: var(--space-3);
}

.section-tag svg {
  width: 14px;
  height: 14px;
}

.section-title {
  font-size: 2.25rem;
  font-weight: 700;
  letter-spacing: -0.02em;
  margin-bottom: var(--space-3);
}

.section-subtitle {
  font-size: 1.125rem;
  color: var(--text-secondary);
}

/* ===== Utility Classes ===== */
.mt-4 { margin-top: var(--space-4); }
.mt-6 { margin-top: var(--space-6); }
.mt-8 { margin-top: var(--space-8); }
.mt-12 { margin-top: var(--space-12); }

.mb-4 { margin-bottom: var(--space-4); }
.mb-6 { margin-bottom: var(--space-6); }
.mb-8 { margin-bottom: var(--space-8); }
.mb-12 { margin-bottom: var(--space-12); }

.hidden { display: none; }

/* ===== Responsive Typography ===== */
@media (max-width: 768px) {
  h1, .text-hero {
    font-size: 2.25rem;
  }
  
  h2, .text-section {
    font-size: 1.75rem;
  }
  
  .hero-title {
    font-size: 2.5rem;
  }
  
  .hero-subtitle {
    font-size: 1.125rem;
  }
  
  .page-title {
    font-size: 2rem;
  }
  
  .section-title {
    font-size: 1.75rem;
  }
  
  .value-grid {
    grid-template-columns: 1fr;
  }
  
  .pricing-card.featured {
    transform: none;
  }
}