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

:root {
  --color-bg: #ffffff;
  --color-bg-alt: #f8fafc;
  --color-bg-dark: #0f172a;
  --color-bg-card: #f1f5f9;
  --color-text: #1e293b;
  --color-text-light: #64748b;
  --color-text-white: #f8fafc;
  --color-primary: #2563eb;
  --color-primary-hover: #1d4ed8;
  --color-primary-light: #dbeafe;
  --color-accent: #10b981;
  --color-accent-hover: #059669;
  --color-accent-light: #d1fae5;
  --color-warning: #f59e0b;
  --color-warning-light: #fef3c7;
  --color-danger: #ef4444;
  --color-border: #e2e8f0;
  --color-border-light: #f1f5f9;
  --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.05);
  --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -2px rgba(0, 0, 0, 0.1);
  --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -4px rgba(0, 0, 0, 0.1);
  --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 8px 10px -6px rgba(0, 0, 0, 0.1);
  --radius-sm: 6px;
  --radius-md: 10px;
  --radius-lg: 16px;
  --max-width: 1200px;
  --max-width-narrow: 800px;
}

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

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, "Noto Sans", sans-serif;
  color: var(--color-text);
  background: var(--color-bg);
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
}

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

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

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

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

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

.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

/* Header */
.site-header {
  background: var(--color-bg);
  border-bottom: 1px solid var(--color-border);
  position: sticky;
  top: 0;
  z-index: 100;
  backdrop-filter: blur(10px);
  background: rgba(255, 255, 255, 0.95);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 20px;
  height: 64px;
}

.site-logo {
  font-size: 1.35rem;
  font-weight: 800;
  color: var(--color-bg-dark);
  letter-spacing: -0.02em;
}

.site-logo span {
  color: var(--color-primary);
}

.main-nav {
  display: flex;
  align-items: center;
  gap: 8px;
  list-style: none;
}

.main-nav a {
  display: inline-flex;
  align-items: center;
  padding: 8px 16px;
  border-radius: var(--radius-sm);
  color: var(--color-text-light);
  font-size: 0.9rem;
  font-weight: 500;
  transition: color 0.15s, background 0.15s;
  min-height: 44px;
}

.main-nav a:hover,
.main-nav a.active {
  color: var(--color-primary);
  background: var(--color-primary-light);
}

.mobile-menu-btn {
  display: none;
  background: none;
  border: none;
  cursor: pointer;
  padding: 10px;
  min-width: 44px;
  min-height: 44px;
  border-radius: var(--radius-sm);
}

.mobile-menu-btn span {
  display: block;
  width: 22px;
  height: 2px;
  background: var(--color-text);
  margin: 5px 0;
  transition: 0.2s;
}

/* Hero */
.hero {
  background: linear-gradient(135deg, #0f172a 0%, #1e3a5f 50%, #1a365d 100%);
  color: var(--color-text-white);
  padding: 80px 0 60px;
  position: relative;
  overflow: hidden;
}

.hero::before {
  content: '';
  position: absolute;
  top: -50%;
  right: -20%;
  width: 600px;
  height: 600px;
  background: radial-gradient(circle, rgba(37, 99, 235, 0.15) 0%, transparent 70%);
  border-radius: 50%;
}

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

.hero-badge {
  display: inline-block;
  background: rgba(16, 185, 129, 0.2);
  color: var(--color-accent);
  padding: 6px 16px;
  border-radius: 100px;
  font-size: 0.85rem;
  font-weight: 600;
  margin-bottom: 20px;
  border: 1px solid rgba(16, 185, 129, 0.3);
}

.hero h1 {
  font-size: clamp(2rem, 5vw, 3rem);
  font-weight: 800;
  line-height: 1.2;
  margin-bottom: 16px;
  letter-spacing: -0.03em;
}

.hero p {
  font-size: 1.15rem;
  color: #94a3b8;
  max-width: 600px;
  margin-bottom: 32px;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 14px 28px;
  font-size: 1rem;
  font-weight: 600;
  border-radius: var(--radius-sm);
  border: none;
  cursor: pointer;
  transition: all 0.2s;
  min-height: 48px;
  white-space: nowrap;
}

.btn-primary {
  background: var(--color-accent);
  color: #fff;
}

.btn-primary:hover {
  background: var(--color-accent-hover);
  color: #fff;
  transform: translateY(-1px);
  box-shadow: var(--shadow-md);
}

.btn-outline {
  background: transparent;
  color: var(--color-text-white);
  border: 2px solid rgba(255, 255, 255, 0.2);
}

.btn-outline:hover {
  background: rgba(255, 255, 255, 0.1);
  color: var(--color-text-white);
  border-color: rgba(255, 255, 255, 0.4);
}

.btn-sm {
  padding: 10px 20px;
  font-size: 0.875rem;
  min-height: 44px;
}

.btn-block {
  width: 100%;
}

.btn-ghost {
  background: transparent;
  color: var(--color-primary);
  padding: 8px 16px;
}

.btn-ghost:hover {
  background: var(--color-primary-light);
  color: var(--color-primary-hover);
}

/* Section */
.section {
  padding: 64px 0;
}

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

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

.section-header h2 {
  font-size: clamp(1.5rem, 3vw, 2rem);
  font-weight: 700;
  margin-bottom: 12px;
  letter-spacing: -0.02em;
}

.section-header p {
  color: var(--color-text-light);
  font-size: 1.05rem;
  max-width: 600px;
  margin: 0 auto;
}

/* VPN Card */
.vpn-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(340px, 1fr));
  gap: 20px;
}

.vpn-card {
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: 28px;
  transition: box-shadow 0.2s, transform 0.2s;
  position: relative;
}

.vpn-card:hover {
  box-shadow: var(--shadow-lg);
  transform: translateY(-2px);
}

.vpn-card.recommended {
  border-color: var(--color-accent);
  border-width: 2px;
}

.vpn-card-badge {
  position: absolute;
  top: -12px;
  right: 24px;
  background: var(--color-accent);
  color: #fff;
  padding: 4px 16px;
  border-radius: 100px;
  font-size: 0.78rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.03em;
}

.vpn-card-rank {
  font-size: 0.8rem;
  color: var(--color-text-light);
  margin-bottom: 12px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.vpn-card-header {
  display: flex;
  align-items: center;
  gap: 16px;
  margin-bottom: 16px;
}

.vpn-card-logo {
  width: 56px;
  height: 56px;
  border-radius: var(--radius-md);
  background: var(--color-bg-card);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.5rem;
  font-weight: 800;
  color: var(--color-primary);
  flex-shrink: 0;
}

.vpn-card-name {
  font-size: 1.2rem;
  font-weight: 700;
}

.vpn-card-rating {
  display: flex;
  align-items: center;
  gap: 6px;
  font-size: 0.88rem;
  color: var(--color-warning);
  margin-top: 2px;
}

.vpn-card-rating .score {
  color: var(--color-text);
  font-weight: 700;
  margin-left: 4px;
}

.vpn-card-features {
  list-style: none;
  margin-bottom: 20px;
}

.vpn-card-features li {
  padding: 4px 0;
  padding-left: 24px;
  position: relative;
  font-size: 0.92rem;
  color: var(--color-text);
}

.vpn-card-features li::before {
  content: '✓';
  position: absolute;
  left: 0;
  color: var(--color-accent);
  font-weight: 700;
}

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

.vpn-card-price {
  font-size: 1.1rem;
  font-weight: 700;
}

.vpn-card-price span {
  font-size: 0.75rem;
  color: var(--color-text-light);
  font-weight: 400;
}

/* Comparison Table */
.comparison-table-wrap {
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
  border-radius: var(--radius-lg);
  border: 1px solid var(--color-border);
}

.comparison-table {
  width: 100%;
  border-collapse: collapse;
  min-width: 700px;
}

.comparison-table th {
  background: var(--color-bg-dark);
  color: var(--color-text-white);
  padding: 14px 20px;
  text-align: left;
  font-size: 0.85rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  white-space: nowrap;
}

.comparison-table th:first-child {
  border-radius: var(--radius-lg) 0 0 0;
}

.comparison-table th:last-child {
  border-radius: 0 var(--radius-lg) 0 0;
}

.comparison-table td {
  padding: 16px 20px;
  border-bottom: 1px solid var(--color-border-light);
  font-size: 0.92rem;
  vertical-align: middle;
}

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

.comparison-table tr:hover td {
  background: var(--color-bg-alt);
}

.comparison-table .vpn-name-cell {
  font-weight: 700;
  white-space: nowrap;
}

.comparison-table .rating-stars {
  color: var(--color-warning);
}

.comparison-table .price-cell {
  font-weight: 700;
  color: var(--color-text);
}

.comparison-table .discount-cell {
  color: var(--color-accent);
  font-weight: 600;
}

/* Star Rating */
.stars {
  color: var(--color-warning);
  font-size: 1rem;
  letter-spacing: 2px;
}

.star-rating-display {
  display: inline-flex;
  align-items: center;
  gap: 8px;
}

.star-rating-display .stars {
  color: var(--color-warning);
  letter-spacing: 2px;
}

.star-rating-display .value {
  font-weight: 700;
  color: var(--color-text);
}

/* Review Section */
.review-hero {
  background: var(--color-bg-dark);
  color: var(--color-text-white);
  padding: 48px 0;
}

.review-hero-content {
  display: flex;
  align-items: center;
  gap: 24px;
}

.review-hero-logo {
  width: 72px;
  height: 72px;
  border-radius: var(--radius-md);
  background: rgba(255, 255, 255, 0.1);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 2rem;
  font-weight: 800;
  flex-shrink: 0;
}

.review-hero-info h1 {
  font-size: clamp(1.5rem, 4vw, 2rem);
  font-weight: 800;
  margin-bottom: 4px;
}

.review-hero-info .meta {
  color: #94a3b8;
  font-size: 0.95rem;
}

.review-score {
  margin-left: auto;
  text-align: center;
  flex-shrink: 0;
}

.review-score-number {
  font-size: 3rem;
  font-weight: 800;
  color: var(--color-accent);
  line-height: 1;
}

.review-score-label {
  font-size: 0.85rem;
  color: #94a3b8;
  margin-top: 4px;
}

.pros-cons {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 24px;
  margin: 32px 0;
}

.pros-box,
.cons-box {
  padding: 24px;
  border-radius: var(--radius-md);
}

.pros-box {
  background: var(--color-accent-light);
  border: 1px solid rgba(16, 185, 129, 0.2);
}

.cons-box {
  background: #fef2f2;
  border: 1px solid rgba(239, 68, 68, 0.2);
}

.pros-box h3,
.cons-box h3 {
  font-size: 1.05rem;
  font-weight: 700;
  margin-bottom: 12px;
  display: flex;
  align-items: center;
  gap: 8px;
}

.pros-box h3 {
  color: var(--color-accent);
}

.cons-box h3 {
  color: var(--color-danger);
}

.pros-box ul,
.cons-box ul {
  list-style: none;
}

.pros-box li,
.cons-box li {
  padding: 4px 0;
  padding-left: 20px;
  position: relative;
  font-size: 0.92rem;
}

.pros-box li::before {
  content: '+';
  position: absolute;
  left: 0;
  color: var(--color-accent);
  font-weight: 700;
}

.cons-box li::before {
  content: '−';
  position: absolute;
  left: 0;
  color: var(--color-danger);
  font-weight: 700;
}

/* Feature Grid */
.feature-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(250px, 1fr));
  gap: 24px;
}

.feature-card {
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: 24px;
  text-align: center;
  transition: box-shadow 0.2s;
}

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

.feature-icon {
  width: 56px;
  height: 56px;
  background: var(--color-primary-light);
  border-radius: var(--radius-md);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-size: 1.5rem;
  margin-bottom: 16px;
}

.feature-card h3 {
  font-size: 1.05rem;
  font-weight: 700;
  margin-bottom: 8px;
}

.feature-card p {
  font-size: 0.9rem;
  color: var(--color-text-light);
}

/* Guide Cards */
.guide-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
  gap: 20px;
}

.guide-card {
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: 28px;
  transition: box-shadow 0.2s, transform 0.2s;
}

.guide-card:hover {
  box-shadow: var(--shadow-lg);
  transform: translateY(-2px);
}

.guide-card .guide-label {
  display: inline-block;
  background: var(--color-primary-light);
  color: var(--color-primary);
  padding: 3px 12px;
  border-radius: 100px;
  font-size: 0.78rem;
  font-weight: 600;
  margin-bottom: 12px;
  text-transform: uppercase;
  letter-spacing: 0.03em;
}

.guide-card h3 {
  font-size: 1.15rem;
  font-weight: 700;
  margin-bottom: 8px;
}

.guide-card h3 a {
  color: var(--color-text);
}

.guide-card h3 a:hover {
  color: var(--color-primary);
}

.guide-card p {
  font-size: 0.9rem;
  color: var(--color-text-light);
  margin-bottom: 16px;
}

.guide-card .read-more {
  font-size: 0.88rem;
  font-weight: 600;
  color: var(--color-primary);
}

/* FAQ */
.faq-list {
  max-width: var(--max-width-narrow);
  margin: 0 auto;
}

.faq-item {
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  margin-bottom: 12px;
  overflow: hidden;
}

.faq-question {
  width: 100%;
  background: none;
  border: none;
  padding: 18px 24px;
  text-align: left;
  font-size: 1rem;
  font-weight: 600;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: space-between;
  color: var(--color-text);
  min-height: 44px;
}

.faq-question:hover {
  background: var(--color-bg-alt);
}

.faq-answer {
  padding: 0 24px 18px;
  font-size: 0.95rem;
  color: var(--color-text-light);
  display: none;
}

.faq-item.open .faq-answer {
  display: block;
}

.faq-item.open .faq-question {
  color: var(--color-primary);
}

/* Breadcrumb */
.breadcrumb {
  display: flex;
  align-items: center;
  gap: 8px;
  flex-wrap: wrap;
  padding: 16px 0;
  font-size: 0.85rem;
  color: var(--color-text-light);
}

.breadcrumb a {
  color: var(--color-text-light);
}

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

.breadcrumb .separator {
  user-select: none;
}

/* Content Page */
.content-page {
  padding: 32px 0 64px;
}

.content-page h2 {
  font-size: 1.5rem;
  font-weight: 700;
  margin: 40px 0 16px;
}

.content-page h3 {
  font-size: 1.15rem;
  font-weight: 700;
  margin: 28px 0 12px;
}

.content-page p {
  margin-bottom: 16px;
  font-size: 1.02rem;
  line-height: 1.8;
}

.content-page ul,
.content-page ol {
  margin: 0 0 16px 24px;
}

.content-page li {
  margin-bottom: 8px;
  line-height: 1.7;
}

.content-page .highlight-box {
  background: var(--color-primary-light);
  border-left: 4px solid var(--color-primary);
  padding: 20px 24px;
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
  margin: 24px 0;
}

.content-page .highlight-box p {
  margin: 0;
}

/* CTA Banner */
.cta-banner {
  background: linear-gradient(135deg, var(--color-primary) 0%, #1e40af 100%);
  color: #fff;
  padding: 40px 32px;
  border-radius: var(--radius-lg);
  text-align: center;
  margin: 48px 0;
}

.cta-banner h3 {
  font-size: 1.3rem;
  font-weight: 700;
  margin-bottom: 8px;
  color: #fff;
}

.cta-banner p {
  color: rgba(255, 255, 255, 0.8);
  margin-bottom: 20px;
}

.cta-banner .btn {
  background: #fff;
  color: var(--color-primary);
}

.cta-banner .btn:hover {
  background: var(--color-bg-alt);
  color: var(--color-primary-hover);
}

/* Pricing Table */
.pricing-cards {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(240px, 1fr));
  gap: 16px;
  margin: 24px 0;
}

.pricing-card {
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: 24px;
  text-align: center;
}

.pricing-card.popular {
  border-color: var(--color-accent);
  border-width: 2px;
  position: relative;
}

.pricing-card .popular-badge {
  position: absolute;
  top: -12px;
  left: 50%;
  transform: translateX(-50%);
  background: var(--color-accent);
  color: #fff;
  padding: 3px 20px;
  border-radius: 100px;
  font-size: 0.75rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.pricing-card .plan-name {
  font-size: 1.05rem;
  font-weight: 700;
  margin-bottom: 4px;
}

.pricing-card .plan-duration {
  font-size: 0.85rem;
  color: var(--color-text-light);
  margin-bottom: 16px;
}

.pricing-card .plan-price {
  font-size: 2rem;
  font-weight: 800;
  color: var(--color-text);
  margin-bottom: 4px;
}

.pricing-card .plan-price span {
  font-size: 0.8rem;
  font-weight: 400;
  color: var(--color-text-light);
}

.pricing-card .plan-save {
  font-size: 0.85rem;
  color: var(--color-accent);
  font-weight: 600;
  margin-bottom: 16px;
}

/* Disclaimer */
.disclaimer {
  background: var(--color-bg-alt);
  padding: 16px 20px;
  border-radius: var(--radius-sm);
  margin-top: 32px;
  font-size: 0.82rem;
  color: var(--color-text-light);
  line-height: 1.6;
}

/* Footer */
.site-footer {
  background: var(--color-bg-dark);
  color: #94a3b8;
  padding: 48px 0 32px;
}

.footer-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
  gap: 32px;
  margin-bottom: 32px;
}

.footer-col h4 {
  color: var(--color-text-white);
  font-size: 0.95rem;
  font-weight: 700;
  margin-bottom: 16px;
}

.footer-col ul {
  list-style: none;
}

.footer-col li {
  margin-bottom: 10px;
}

.footer-col a {
  color: #94a3b8;
  font-size: 0.88rem;
}

.footer-col a:hover {
  color: var(--color-text-white);
}

.footer-bottom {
  border-top: 1px solid rgba(255, 255, 255, 0.08);
  padding-top: 24px;
  text-align: center;
  font-size: 0.85rem;
}

/* Responsive */
@media (max-width: 768px) {
  .hero {
    padding: 48px 0 40px;
  }

  .hero h1 {
    font-size: 1.75rem;
  }

  .hero p {
    font-size: 1rem;
  }

  .main-nav {
    display: none;
  }

  .main-nav.open {
    display: flex;
    flex-direction: column;
    position: absolute;
    top: 64px;
    left: 0;
    right: 0;
    background: var(--color-bg);
    border-bottom: 1px solid var(--color-border);
    padding: 12px 20px;
    box-shadow: var(--shadow-lg);
  }

  .mobile-menu-btn {
    display: block;
  }

  .pros-cons {
    grid-template-columns: 1fr;
  }

  .review-hero-content {
    flex-direction: column;
    text-align: center;
  }

  .review-hero-logo {
    margin: 0 auto;
  }

  .review-score {
    margin-left: 0;
  }

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

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

  .pricing-cards {
    grid-template-columns: 1fr;
  }

  .section {
    padding: 40px 0;
  }
}

@media (max-width: 480px) {
  .vpn-card-bottom {
    flex-direction: column;
    gap: 12px;
    align-items: flex-start;
  }

  .vpn-card-bottom .btn {
    width: 100%;
  }
}