:root {
  --primary: #0068FF;
  --primary-dark: #0052CC;
  --primary-light: #E6F0FF;
  --secondary: #00C853;
  --accent: #FF6B35;
  --dark: #1A1A2E;
  --gray-900: #1F2937;
  --gray-700: #374151;
  --gray-500: #6B7280;
  --gray-300: #D1D5DB;
  --gray-100: #F3F4F6;
  --white: #FFFFFF;
  --gradient-hero: linear-gradient(135deg, #0068FF 0%, #00C853 100%);
  --gradient-card: linear-gradient(180deg, #FFFFFF 0%, #F8FAFC 100%);
  --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 -1px rgba(0,0,0,0.06);
  --shadow-lg: 0 10px 15px -3px rgba(0,0,0,0.1), 0 4px 6px -2px rgba(0,0,0,0.05);
  --shadow-xl: 0 20px 25px -5px rgba(0,0,0,0.1), 0 10px 10px -5px rgba(0,0,0,0.04);
  --radius-sm: 6px;
  --radius-md: 12px;
  --radius-lg: 20px;
  --radius-full: 9999px;
}

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

html {
  scroll-behavior: smooth;
}

body {
  font-family: 'Segoe UI', -apple-system, BlinkMacSystemFont, 'Roboto', 'Helvetica Neue', sans-serif;
  font-size: 16px;
  line-height: 1.6;
  color: var(--gray-900);
  background: var(--white);
  -webkit-font-smoothing: antialiased;
}

a {
  color: var(--primary);
  text-decoration: none;
  transition: color 0.2s;
}

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

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

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

button:disabled {
  cursor: not-allowed;
  opacity: 0.7;
}

.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 20px;
}

@keyframes spin {
  from { transform: rotate(0deg); }
  to { transform: rotate(360deg); }
}

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

@keyframes pulse {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.7; }
}

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

@keyframes gradientShift {
  0% { background-position: 0% 50%; }
  50% { background-position: 100% 50%; }
  100% { background-position: 0% 50%; }
}

/* ===== TOP ACCENT BAR ===== */
.accent-bar {
  height: 4px;
  background: var(--gradient-hero);
  background-size: 200% 200%;
  animation: gradientShift 4s ease infinite;
}

/* ===== NAVIGATION ===== */
.navbar {
  background: var(--white);
  border-bottom: 1px solid var(--gray-300);
  position: sticky;
  top: 0;
  z-index: 1000;
  box-shadow: var(--shadow-sm);
}

.navbar .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 70px;
}

.logo {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--primary);
}

.logo svg {
  width: 40px;
  height: 40px;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 8px;
}

.nav-links a {
  padding: 10px 20px;
  border-radius: var(--radius-full);
  color: var(--gray-700);
  font-weight: 500;
  transition: all 0.2s;
}

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

.nav-links a.active {
  background: var(--primary);
  color: var(--white);
}

.nav-download-btn {
  background: var(--primary);
  color: var(--white) !important;
  padding: 10px 24px !important;
  border-radius: var(--radius-full) !important;
  font-weight: 600 !important;
  box-shadow: var(--shadow-md);
  transition: all 0.2s !important;
}

.nav-download-btn:hover {
  background: var(--primary-dark) !important;
  transform: translateY(-2px);
  box-shadow: var(--shadow-lg) !important;
}

/* ===== HERO SECTION ===== */
.hero {
  background: linear-gradient(135deg, var(--dark) 0%, #2D2D44 50%, var(--primary-dark) 100%);
  color: var(--white);
  padding: 100px 0 120px;
  position: relative;
  overflow: hidden;
}

.hero::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: url("data:image/svg+xml,%3Csvg width='60' height='60' viewBox='0 0 60 60' xmlns='http://www.w3.org/2000/svg'%3E%3Cg fill='none' fill-rule='evenodd'%3E%3Cg fill='%23ffffff' fill-opacity='0.03'%3E%3Cpath d='M36 34v-4h-2v4h-4v2h4v4h2v-4h4v-2h-4zm0-30V0h-2v4h-4v2h4v4h2V6h4V4h-4zM6 34v-4H4v4H0v2h4v4h2v-4h4v-2H6zM6 4V0H4v4H0v2h4v4h2V6h4V4H6z'/%3E%3C/g%3E%3C/g%3E%3C/svg%3E");
  pointer-events: none;
}

.hero .container {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 60px;
  align-items: center;
  position: relative;
  z-index: 1;
}

.hero-content {
  animation: fadeInUp 0.8s ease;
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: rgba(255,255,255,0.15);
  backdrop-filter: blur(10px);
  padding: 8px 16px;
  border-radius: var(--radius-full);
  font-size: 0.875rem;
  margin-bottom: 24px;
  border: 1px solid rgba(255,255,255,0.2);
}

.hero-badge svg {
  width: 16px;
  height: 16px;
  color: var(--secondary);
}

.hero h1 {
  font-size: 3.5rem;
  font-weight: 800;
  line-height: 1.1;
  margin-bottom: 20px;
  background: linear-gradient(135deg, #FFFFFF 0%, #E0E7FF 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hero-subtitle {
  font-size: 1.25rem;
  color: rgba(255,255,255,0.8);
  margin-bottom: 32px;
  line-height: 1.7;
}

.hero-stats {
  display: flex;
  gap: 40px;
  margin-bottom: 40px;
}

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

.hero-stat-value {
  font-size: 2rem;
  font-weight: 700;
  color: var(--secondary);
}

.hero-stat-label {
  font-size: 0.875rem;
  color: rgba(255,255,255,0.7);
}

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

.hero-visual {
  position: relative;
  animation: fadeInUp 0.8s ease 0.2s both;
}

.hero-mockup {
  background: var(--white);
  border-radius: var(--radius-lg);
  padding: 20px;
  box-shadow: var(--shadow-xl);
  position: relative;
}

.mockup-header {
  display: flex;
  align-items: center;
  gap: 8px;
  margin-bottom: 16px;
  padding-bottom: 12px;
  border-bottom: 1px solid var(--gray-100);
}

.mockup-dot {
  width: 12px;
  height: 12px;
  border-radius: 50%;
}

.mockup-dot.red { background: #FF5F56; }
.mockup-dot.yellow { background: #FFBD2E; }
.mockup-dot.green { background: #27CA40; }

.mockup-content {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.mockup-chat {
  display: flex;
  gap: 12px;
  align-items: flex-start;
}

.mockup-avatar {
  width: 40px;
  height: 40px;
  border-radius: 50%;
  background: var(--primary-light);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}

.mockup-avatar svg {
  width: 24px;
  height: 24px;
  color: var(--primary);
}

.mockup-bubble {
  background: var(--gray-100);
  padding: 12px 16px;
  border-radius: 16px 16px 16px 4px;
  max-width: 80%;
}

.mockup-bubble.sent {
  background: var(--primary);
  color: var(--white);
  border-radius: 16px 16px 4px 16px;
  margin-left: auto;
}

.mockup-bubble p {
  font-size: 0.9rem;
  margin: 0;
}

.mockup-time {
  font-size: 0.75rem;
  color: var(--gray-500);
  margin-top: 4px;
}

.floating-badge {
  position: absolute;
  background: var(--white);
  padding: 12px 16px;
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-lg);
  display: flex;
  align-items: center;
  gap: 10px;
  animation: float 3s ease-in-out infinite;
}

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

.floating-badge.bottom-left {
  bottom: -20px;
  left: -20px;
  animation-delay: 1.5s;
}

.floating-badge svg {
  width: 24px;
  height: 24px;
  color: var(--primary);
}

.floating-badge span {
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--gray-900);
}

/* ===== BUTTONS ===== */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  padding: 14px 28px;
  border-radius: var(--radius-full);
  font-size: 1rem;
  font-weight: 600;
  transition: all 0.2s;
}

.btn-primary {
  background: var(--primary);
  color: var(--white);
  box-shadow: 0 4px 14px rgba(0,104,255,0.4);
}

.btn-primary:hover {
  background: var(--primary-dark);
  transform: translateY(-2px);
  box-shadow: 0 6px 20px rgba(0,104,255,0.5);
}

.btn-secondary {
  background: var(--white);
  color: var(--primary);
  border: 2px solid var(--primary);
}

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

.btn-white {
  background: var(--white);
  color: var(--gray-900);
  box-shadow: var(--shadow-md);
}

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

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

.btn-dark:hover {
  background: var(--gray-900);
}

.btn-green {
  background: var(--secondary);
  color: var(--white);
  box-shadow: 0 4px 14px rgba(0,200,83,0.4);
}

.btn-green:hover {
  background: #00A844;
  transform: translateY(-2px);
}

.btn svg {
  width: 20px;
  height: 20px;
}

.btn-lg {
  padding: 18px 36px;
  font-size: 1.125rem;
}

/* ===== SECTION STYLES ===== */
section {
  padding: 80px 0;
}

.section-header {
  text-align: center;
  max-width: 700px;
  margin: 0 auto 60px;
}

.section-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: var(--primary-light);
  color: var(--primary);
  padding: 8px 16px;
  border-radius: var(--radius-full);
  font-size: 0.875rem;
  font-weight: 600;
  margin-bottom: 16px;
}

.section-title {
  font-size: 2.5rem;
  font-weight: 700;
  color: var(--gray-900);
  margin-bottom: 16px;
}

.section-subtitle {
  font-size: 1.125rem;
  color: var(--gray-500);
}

/* ===== FEATURES GRID ===== */
.features-section {
  background: var(--gray-100);
}

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

.feature-card {
  background: var(--white);
  padding: 32px;
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-sm);
  transition: all 0.3s;
  position: relative;
  overflow: hidden;
}

.feature-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 4px;
  background: var(--gradient-hero);
  transform: scaleX(0);
  transition: transform 0.3s;
}

.feature-card:hover {
  transform: translateY(-8px);
  box-shadow: var(--shadow-xl);
}

.feature-card:hover::before {
  transform: scaleX(1);
}

.feature-icon {
  width: 60px;
  height: 60px;
  background: var(--primary-light);
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 20px;
}

.feature-icon svg {
  width: 30px;
  height: 30px;
  color: var(--primary);
}

.feature-card h3 {
  font-size: 1.25rem;
  font-weight: 600;
  color: var(--gray-900);
  margin-bottom: 12px;
}

.feature-card p {
  color: var(--gray-500);
  line-height: 1.7;
}

/* ===== PLATFORMS SECTION ===== */
.platforms-section {
  background: var(--white);
}

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

.platform-card {
  background: var(--gradient-card);
  border: 1px solid var(--gray-300);
  border-radius: var(--radius-lg);
  padding: 32px 24px;
  text-align: center;
  transition: all 0.3s;
}

.platform-card:hover {
  border-color: var(--primary);
  box-shadow: var(--shadow-lg);
  transform: translateY(-4px);
}

.platform-card.featured {
  background: var(--dark);
  border-color: var(--dark);
  color: var(--white);
}

.platform-card.featured h3,
.platform-card.featured p {
  color: var(--white);
}

.platform-card.featured p {
  opacity: 0.8;
}

.platform-icon {
  width: 64px;
  height: 64px;
  margin: 0 auto 20px;
  background: var(--primary-light);
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
}

.platform-card.featured .platform-icon {
  background: rgba(255,255,255,0.1);
}

.platform-icon svg {
  width: 32px;
  height: 32px;
  color: var(--primary);
}

.platform-card.featured .platform-icon svg {
  color: var(--white);
}

.platform-card h3 {
  font-size: 1.25rem;
  font-weight: 600;
  margin-bottom: 8px;
  color: var(--gray-900);
}

.platform-card p {
  font-size: 0.875rem;
  color: var(--gray-500);
  margin-bottom: 20px;
}

.platform-card .btn {
  width: 100%;
}

/* ===== SHOWCASE ROWS ===== */
.showcase-section {
  padding: 0;
}

.showcase-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  min-height: 500px;
}

.showcase-row:nth-child(even) .showcase-content {
  order: 2;
}

.showcase-row:nth-child(even) .showcase-visual {
  order: 1;
}

.showcase-content {
  padding: 80px 60px;
  display: flex;
  flex-direction: column;
  justify-content: center;
}

.showcase-visual {
  background: var(--primary-light);
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 40px;
}

.showcase-row:nth-child(even) .showcase-visual {
  background: var(--gray-100);
}

.showcase-content .section-badge {
  align-self: flex-start;
}

.showcase-content h2 {
  font-size: 2.25rem;
  font-weight: 700;
  color: var(--gray-900);
  margin-bottom: 20px;
}

.showcase-content p {
  font-size: 1.125rem;
  color: var(--gray-500);
  margin-bottom: 24px;
  line-height: 1.8;
}

.showcase-list {
  list-style: none;
  margin-bottom: 32px;
}

.showcase-list li {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  margin-bottom: 16px;
  color: var(--gray-700);
}

.showcase-list li svg {
  width: 24px;
  height: 24px;
  color: var(--secondary);
  flex-shrink: 0;
  margin-top: 2px;
}

.showcase-panel {
  background: var(--white);
  border-radius: var(--radius-lg);
  padding: 24px;
  box-shadow: var(--shadow-xl);
  max-width: 400px;
}

.showcase-panel-header {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 20px;
  padding-bottom: 16px;
  border-bottom: 1px solid var(--gray-100);
}

.showcase-panel-header svg {
  width: 32px;
  height: 32px;
  color: var(--primary);
}

.showcase-panel-header h4 {
  font-size: 1.125rem;
  font-weight: 600;
}

.showcase-panel-stats {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 16px;
}

.panel-stat {
  background: var(--gray-100);
  padding: 16px;
  border-radius: var(--radius-md);
  text-align: center;
}

.panel-stat-value {
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--primary);
}

.panel-stat-label {
  font-size: 0.75rem;
  color: var(--gray-500);
  margin-top: 4px;
}

/* ===== STATS SECTION ===== */
.stats-section {
  background: var(--dark);
  color: var(--white);
  padding: 60px 0;
}

.stats-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 40px;
  text-align: center;
}

.stat-item {
  padding: 20px;
}

.stat-value {
  font-size: 3rem;
  font-weight: 800;
  background: var(--gradient-hero);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  margin-bottom: 8px;
}

.stat-label {
  font-size: 1rem;
  color: rgba(255,255,255,0.7);
}

/* ===== COMPARISON TABLE ===== */
.comparison-section {
  background: var(--gray-100);
}

.comparison-table {
  width: 100%;
  background: var(--white);
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-md);
  border-collapse: collapse;
}

.comparison-table th,
.comparison-table td {
  padding: 20px 24px;
  text-align: left;
  border-bottom: 1px solid var(--gray-100);
}

.comparison-table thead {
  background: var(--dark);
  color: var(--white);
}

.comparison-table th {
  font-weight: 600;
  font-size: 0.9rem;
}

.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 tbody tr:hover {
  background: var(--gray-100);
}

.comparison-table td:first-child {
  font-weight: 600;
  color: var(--gray-900);
}

.comparison-table .highlight {
  background: var(--primary-light);
}

.comparison-table .highlight td {
  color: var(--primary);
  font-weight: 600;
}

.check-icon {
  color: var(--secondary);
}

.cross-icon {
  color: var(--gray-300);
}

/* ===== REVIEWS SECTION ===== */
.reviews-section {
  background: var(--white);
}

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

.review-card {
  background: var(--gradient-card);
  border: 1px solid var(--gray-300);
  border-radius: var(--radius-lg);
  padding: 28px;
  transition: all 0.3s;
}

.review-card:hover {
  border-color: var(--primary);
  box-shadow: var(--shadow-lg);
}

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

.review-avatar {
  width: 50px;
  height: 50px;
  border-radius: 50%;
  background: var(--primary-light);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.25rem;
  font-weight: 600;
  color: var(--primary);
}

.review-info h4 {
  font-size: 1rem;
  font-weight: 600;
  color: var(--gray-900);
  margin-bottom: 4px;
}

.review-stars {
  display: flex;
  gap: 2px;
}

.review-stars svg {
  width: 16px;
  height: 16px;
  color: #FFC107;
  fill: #FFC107;
}

.review-card p {
  color: var(--gray-500);
  line-height: 1.7;
  font-style: italic;
}

/* ===== FAQ SECTION ===== */
.faq-section {
  background: var(--gray-100);
}

.faq-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 20px;
}

.faq-item {
  background: var(--white);
  border-radius: var(--radius-md);
  overflow: hidden;
  box-shadow: var(--shadow-sm);
}

.faq-question {
  width: 100%;
  padding: 20px 24px;
  background: var(--white);
  border: none;
  text-align: left;
  font-size: 1rem;
  font-weight: 600;
  color: var(--gray-900);
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  transition: all 0.2s;
}

.faq-question:hover {
  background: var(--gray-100);
}

.faq-question svg {
  width: 20px;
  height: 20px;
  color: var(--primary);
  transition: transform 0.3s;
  flex-shrink: 0;
}

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

.faq-answer {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.3s ease;
}

.faq-item.active .faq-answer {
  max-height: 500px;
}

.faq-answer-content {
  padding: 0 24px 20px;
  color: var(--gray-500);
  line-height: 1.7;
}

/* ===== CTA SECTION ===== */
.cta-section {
  background: var(--gradient-hero);
  color: var(--white);
  padding: 80px 0;
  text-align: center;
}

.cta-section h2 {
  font-size: 2.5rem;
  font-weight: 700;
  margin-bottom: 16px;
}

.cta-section p {
  font-size: 1.25rem;
  opacity: 0.9;
  margin-bottom: 32px;
  max-width: 600px;
  margin-left: auto;
  margin-right: auto;
}

.cta-buttons {
  display: flex;
  gap: 16px;
  justify-content: center;
  flex-wrap: wrap;
}

/* ===== FOOTER ===== */
.footer {
  background: var(--dark);
  color: var(--white);
  padding: 40px 0;
}

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

.footer-verify {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: rgba(0,200,83,0.15);
  color: var(--secondary);
  padding: 10px 20px;
  border-radius: var(--radius-full);
  font-size: 0.9rem;
  margin-bottom: 20px;
}

.footer-verify svg {
  width: 18px;
  height: 18px;
}

.footer-text {
  color: rgba(255,255,255,0.6);
  font-size: 0.875rem;
  line-height: 1.8;
  max-width: 700px;
  margin: 0 auto;
}

/* ===== DOWNLOAD PAGE STYLES ===== */
.download-hero {
  background: linear-gradient(135deg, var(--primary) 0%, var(--primary-dark) 100%);
  color: var(--white);
  padding: 80px 0;
  text-align: center;
}

.download-hero h1 {
  font-size: 2.75rem;
  font-weight: 700;
  margin-bottom: 16px;
}

.download-hero p {
  font-size: 1.25rem;
  opacity: 0.9;
  max-width: 600px;
  margin: 0 auto;
}

.main-download-section {
  padding: 80px 0;
  background: var(--white);
}

.main-download-card {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 40px;
  background: var(--dark);
  border-radius: var(--radius-lg);
  overflow: hidden;
  color: var(--white);
}

.main-download-info {
  padding: 48px;
  display: flex;
  flex-direction: column;
  justify-content: center;
}

.main-download-info h2 {
  font-size: 2rem;
  font-weight: 700;
  margin-bottom: 16px;
}

.main-download-info p {
  opacity: 0.8;
  margin-bottom: 24px;
  line-height: 1.7;
}

.download-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 24px;
  margin-bottom: 32px;
}

.download-meta-item {
  display: flex;
  align-items: center;
  gap: 8px;
}

.download-meta-item svg {
  width: 20px;
  height: 20px;
  color: var(--secondary);
}

.download-meta-item span {
  font-size: 0.9rem;
  opacity: 0.9;
}

.main-download-visual {
  background: var(--primary-light);
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 40px;
}

.download-illustration {
  max-width: 300px;
}

.download-illustration svg {
  width: 100%;
  height: auto;
}

.other-platforms-section {
  padding: 80px 0;
  background: var(--gray-100);
}

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

.platform-download-card {
  background: var(--white);
  border-radius: var(--radius-lg);
  padding: 32px;
  text-align: center;
  box-shadow: var(--shadow-sm);
  transition: all 0.3s;
}

.platform-download-card:hover {
  box-shadow: var(--shadow-lg);
  transform: translateY(-4px);
}

.platform-download-card .platform-icon {
  margin: 0 auto 20px;
}

.platform-download-card h3 {
  font-size: 1.25rem;
  font-weight: 600;
  color: var(--gray-900);
  margin-bottom: 8px;
}

.platform-download-card .version {
  font-size: 0.875rem;
  color: var(--gray-500);
  margin-bottom: 16px;
}

.platform-download-card .requirements {
  font-size: 0.8rem;
  color: var(--gray-500);
  margin-bottom: 20px;
  padding: 12px;
  background: var(--gray-100);
  border-radius: var(--radius-sm);
}

.platform-download-card .btn {
  width: 100%;
}

.install-guide-section {
  padding: 80px 0;
  background: var(--white);
}

.install-steps {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: 24px;
  margin-top: 40px;
}

.install-step {
  text-align: center;
  position: relative;
}

.install-step::after {
  content: '';
  position: absolute;
  top: 30px;
  right: -12px;
  width: calc(100% - 60px);
  height: 2px;
  background: var(--gray-300);
}

.install-step:last-child::after {
  display: none;
}

.step-number {
  width: 60px;
  height: 60px;
  background: var(--primary);
  color: var(--white);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.5rem;
  font-weight: 700;
  margin: 0 auto 16px;
  position: relative;
  z-index: 1;
}

.install-step h4 {
  font-size: 1rem;
  font-weight: 600;
  color: var(--gray-900);
  margin-bottom: 8px;
}

.install-step p {
  font-size: 0.875rem;
  color: var(--gray-500);
  line-height: 1.6;
}

.version-history-section {
  padding: 80px 0;
  background: var(--gray-100);
}

.version-list {
  max-width: 800px;
  margin: 0 auto;
}

.version-item {
  background: var(--white);
  border-radius: var(--radius-md);
  padding: 24px;
  margin-bottom: 16px;
  display: grid;
  grid-template-columns: 120px 1fr;
  gap: 24px;
  box-shadow: var(--shadow-sm);
}

.version-item:first-child {
  border-left: 4px solid var(--primary);
}

.version-number {
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--primary);
}

.version-date {
  font-size: 0.875rem;
  color: var(--gray-500);
  margin-top: 4px;
}

.version-changes h4 {
  font-size: 1rem;
  font-weight: 600;
  color: var(--gray-900);
  margin-bottom: 8px;
}

.version-changes ul {
  list-style: none;
}

.version-changes li {
  display: flex;
  align-items: flex-start;
  gap: 8px;
  color: var(--gray-500);
  font-size: 0.9rem;
  margin-bottom: 6px;
}

.version-changes li::before {
  content: '•';
  color: var(--primary);
  font-weight: bold;
}

.security-section {
  padding: 60px 0;
  background: var(--secondary);
  color: var(--white);
  text-align: center;
}

.security-section h2 {
  font-size: 1.75rem;
  font-weight: 700;
  margin-bottom: 16px;
}

.security-section p {
  opacity: 0.9;
  max-width: 600px;
  margin: 0 auto;
  line-height: 1.7;
}

/* ===== SEO PAGE STYLES ===== */
.article-hero {
  background: linear-gradient(135deg, var(--primary-light) 0%, var(--white) 100%);
  padding: 60px 0;
  border-bottom: 1px solid var(--gray-300);
}

.breadcrumb {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 0.875rem;
  color: var(--gray-500);
  margin-bottom: 20px;
}

.breadcrumb a {
  color: var(--gray-500);
}

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

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

.article-hero h1 {
  font-size: 2.5rem;
  font-weight: 700;
  color: var(--gray-900);
  margin-bottom: 16px;
}

.article-meta {
  display: flex;
  align-items: center;
  gap: 24px;
  color: var(--gray-500);
  font-size: 0.9rem;
}

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

.article-meta svg {
  width: 16px;
  height: 16px;
}

.article-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 20px;
}

.article-tag {
  background: var(--primary-light);
  color: var(--primary);
  padding: 6px 14px;
  border-radius: var(--radius-full);
  font-size: 0.8rem;
  font-weight: 500;
}

.article-layout {
  display: grid;
  grid-template-columns: 1fr 300px;
  gap: 40px;
  padding: 60px 0;
}

.article-content {
  max-width: 100%;
}

.article-content h2 {
  font-size: 1.75rem;
  font-weight: 700;
  color: var(--gray-900);
  margin: 40px 0 20px;
  padding-top: 20px;
  border-top: 1px solid var(--gray-100);
}

.article-content h2:first-child {
  margin-top: 0;
  padding-top: 0;
  border-top: none;
}

.article-content p {
  color: var(--gray-700);
  line-height: 1.8;
  margin-bottom: 20px;
}

.article-content ul {
  margin-bottom: 20px;
  padding-left: 24px;
}

.article-content li {
  color: var(--gray-700);
  line-height: 1.8;
  margin-bottom: 8px;
}

.article-sidebar {
  position: sticky;
  top: 90px;
  height: fit-content;
}

.sidebar-card {
  background: var(--white);
  border: 1px solid var(--gray-300);
  border-radius: var(--radius-lg);
  padding: 24px;
  margin-bottom: 24px;
}

.sidebar-card h3 {
  font-size: 1rem;
  font-weight: 600;
  color: var(--gray-900);
  margin-bottom: 16px;
  padding-bottom: 12px;
  border-bottom: 1px solid var(--gray-100);
}

.toc-list {
  list-style: none;
}

.toc-list li {
  margin-bottom: 8px;
}

.toc-list a {
  display: block;
  padding: 8px 12px;
  color: var(--gray-500);
  font-size: 0.9rem;
  border-radius: var(--radius-sm);
  transition: all 0.2s;
}

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

.sidebar-download {
  background: var(--primary);
  color: var(--white);
  border: none;
}

.sidebar-download h3 {
  color: var(--white);
  border-bottom-color: rgba(255,255,255,0.2);
}

.sidebar-download p {
  opacity: 0.9;
  font-size: 0.9rem;
  margin-bottom: 16px;
}

.sidebar-download .btn {
  width: 100%;
}

.tips-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 20px;
  margin: 24px 0;
}

.tip-card {
  background: var(--gray-100);
  border-radius: var(--radius-md);
  padding: 20px;
}

.tip-card h4 {
  font-size: 1rem;
  font-weight: 600;
  color: var(--gray-900);
  margin-bottom: 8px;
  display: flex;
  align-items: center;
  gap: 8px;
}

.tip-card h4 svg {
  width: 20px;
  height: 20px;
  color: var(--primary);
}

.tip-card p {
  font-size: 0.9rem;
  color: var(--gray-500);
  margin: 0;
}

.cta-box {
  background: var(--gradient-hero);
  color: var(--white);
  border-radius: var(--radius-lg);
  padding: 40px;
  text-align: center;
  margin: 40px 0;
}

.cta-box h3 {
  font-size: 1.5rem;
  font-weight: 700;
  margin-bottom: 12px;
}

.cta-box p {
  opacity: 0.9;
  margin-bottom: 24px;
}

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

.cta-box .btn:hover {
  background: var(--gray-100);
}

/* ===== RESPONSIVE ===== */
@media (max-width: 1024px) {
  .hero .container {
    grid-template-columns: 1fr;
    text-align: center;
  }
  
  .hero-content {
    order: 1;
  }
  
  .hero-visual {
    order: 2;
    max-width: 500px;
    margin: 0 auto;
  }
  
  .hero-stats {
    justify-content: center;
  }
  
  .hero-buttons {
    justify-content: center;
  }
  
  .features-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  
  .platforms-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  
  .showcase-row {
    grid-template-columns: 1fr;
  }
  
  .showcase-row:nth-child(even) .showcase-content,
  .showcase-row:nth-child(even) .showcase-visual {
    order: unset;
  }
  
  .stats-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  
  .reviews-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  
  .faq-grid {
    grid-template-columns: 1fr;
  }
  
  .main-download-card {
    grid-template-columns: 1fr;
  }
  
  .main-download-visual {
    order: -1;
    padding: 40px 20px;
  }
  
  .platforms-download-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  
  .install-steps {
    grid-template-columns: repeat(3, 1fr);
  }
  
  .install-step::after {
    display: none;
  }
  
  .article-layout {
    grid-template-columns: 1fr;
  }
  
  .article-sidebar {
    position: static;
    order: -1;
  }
}

@media (max-width: 768px) {
  .navbar .container {
    flex-wrap: wrap;
    height: auto;
    padding: 16px 20px;
    gap: 16px;
  }
  
  .nav-links {
    width: 100%;
    justify-content: center;
    order: 3;
  }
  
  .nav-links a {
    padding: 8px 14px;
    font-size: 0.9rem;
  }
  
  .hero {
    padding: 60px 0 80px;
  }
  
  .hero h1 {
    font-size: 2.25rem;
  }
  
  .hero-stats {
    flex-direction: column;
    gap: 20px;
    align-items: center;
  }
  
  .hero-stat {
    text-align: center;
  }
  
  .features-grid,
  .platforms-grid,
  .reviews-grid {
    grid-template-columns: 1fr;
  }
  
  .stats-grid {
    grid-template-columns: 1fr;
    gap: 20px;
  }
  
  .stat-value {
    font-size: 2.25rem;
  }
  
  .section-title {
    font-size: 1.75rem;
  }
  
  .platforms-download-grid {
    grid-template-columns: 1fr;
  }
  
  .install-steps {
    grid-template-columns: 1fr;
    gap: 32px;
  }
  
  .version-item {
    grid-template-columns: 1fr;
    gap: 12px;
  }
  
  .tips-grid {
    grid-template-columns: 1fr;
  }
  
  .article-hero h1 {
    font-size: 1.75rem;
  }
  
  .article-meta {
    flex-direction: column;
    align-items: flex-start;
    gap: 8px;
  }
}

@media (max-width: 480px) {
  .hero h1 {
    font-size: 1.75rem;
  }
  
  .hero-subtitle {
    font-size: 1rem;
  }
  
  .btn {
    padding: 12px 20px;
    font-size: 0.9rem;
  }
  
  .btn-lg {
    padding: 14px 24px;
    font-size: 1rem;
  }
  
  .floating-badge {
    display: none;
  }
  
  .download-hero h1 {
    font-size: 1.75rem;
  }
  
  .cta-section h2 {
    font-size: 1.75rem;
  }
}