/* ===== CSS Variables ===== */
:root {
  --primary: #2196F3;
  --primary-dark: #1976D2;
  --primary-light: #64B5F6;
  --primary-bg: #E3F2FD;
  --secondary: #FF9800;
  --secondary-dark: #F57C00;
  --secondary-bg: #FFF3E0;
  --success: #4CAF50;
  --success-bg: #E8F5E9;
  --text-primary: #1A1A1A;
  --text-body: #333333;
  --text-muted: #666666;
  --text-light: #999999;
  --border: #E0E0E0;
  --border-light: #EEEEEE;
  --bg: #FAFBFC;
  --white: #FFFFFF;
  --footer-bg: #1E293B;
  --radius-sm: 6px;
  --radius-md: 12px;
  --radius-lg: 16px;
  --radius-xl: 24px;
  --shadow-sm: 0 1px 3px rgba(0,0,0,0.08);
  --shadow-md: 0 4px 12px rgba(0,0,0,0.08);
  --shadow-lg: 0 12px 32px rgba(0,0,0,0.12);
  --shadow-xl: 0 20px 60px rgba(33,150,243,0.15);
}

/* ===== Reset & Base ===== */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
body {
  font-family: 'Noto Sans SC', system-ui, -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  color: var(--text-body);
  background: var(--bg);
  line-height: 1.75;
  -webkit-font-smoothing: antialiased;
}
a { text-decoration: none; color: inherit; }
img { max-width: 100%; height: auto; display: block; }
button { cursor: pointer; font-family: inherit; }
ul, ol { list-style: none; }

/* ===== Animations ===== */
@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 fadeIn {
  from { opacity: 0; }
  to { opacity: 1; }
}

.animate-on-scroll {
  opacity: 0;
  transform: translateY(20px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}
.animate-on-scroll.visible {
  opacity: 1;
  transform: translateY(0);
}

.fade-in-up {
  animation: fadeInUp 0.6s ease-out forwards;
}
.delay-1 { animation-delay: 0.15s; opacity: 0; }
.delay-2 { animation-delay: 0.30s; opacity: 0; }
.delay-3 { animation-delay: 0.45s; opacity: 0; }

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

/* ===== Section Base ===== */
.section {
  padding: 80px 0;
}
.section-alt {
  background: var(--white);
}
.section-tint {
  background: var(--primary-bg);
}

/* ===== Section Header ===== */
.section-header {
  text-align: center;
  margin-bottom: 48px;
}
.section-header.left {
  text-align: left;
}
.section-header .overline {
  display: inline-block;
  font-size: 12px;
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: 2px;
  color: var(--primary);
  background: rgba(33,150,243,0.1);
  padding: 6px 16px;
  border-radius: 9999px;
  margin-bottom: 12px;
}
.section-header h2 {
  font-size: 32px;
  font-weight: 600;
  color: var(--text-primary);
  line-height: 1.35;
}
.section-header .subtitle {
  font-size: 16px;
  color: var(--text-muted);
  margin-top: 12px;
  max-width: 640px;
  display: inline-block;
}
.section-header.left .subtitle {
  display: block;
}

/* ===== Buttons ===== */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 14px 32px;
  border-radius: var(--radius-sm);
  font-size: 16px;
  font-weight: 600;
  border: none;
  transition: all 0.25s ease;
  cursor: pointer;
  white-space: nowrap;
}
.btn:hover {
  transform: translateY(-1px);
}
.btn:active {
  transform: translateY(0);
}
.btn:disabled {
  opacity: 0.8;
  cursor: not-allowed;
  transform: none;
}
.btn-primary {
  background: var(--primary);
  color: var(--white);
  box-shadow: var(--shadow-md);
}
.btn-primary:hover {
  background: var(--primary-dark);
  box-shadow: var(--shadow-lg);
}
.btn-secondary {
  background: var(--white);
  color: var(--primary);
  border: 1px solid var(--primary);
}
.btn-secondary:hover {
  background: var(--primary-bg);
  border-color: var(--primary-dark);
}
.btn-accent {
  background: var(--secondary);
  color: var(--white);
}
.btn-accent:hover {
  background: var(--secondary-dark);
}
.btn-white {
  background: var(--white);
  color: var(--primary);
}
.btn-white:hover {
  transform: scale(1.02);
  box-shadow: var(--shadow-lg);
}
.btn-sm { padding: 10px 20px; font-size: 14px; }
.btn-lg { padding: 18px 40px; font-size: 18px; }
.btn-full { width: 100%; }

/* ===== Feature Card ===== */
.feature-card {
  background: var(--white);
  border-radius: var(--radius-md);
  padding: 32px;
  border: 1px solid var(--border-light);
  box-shadow: var(--shadow-sm);
  transition: all 0.3s ease;
}
.feature-card:hover {
  box-shadow: var(--shadow-md);
  transform: translateY(-4px);
}
.feature-card .icon-wrap {
  width: 56px;
  height: 56px;
  border-radius: 50%;
  background: var(--primary-bg);
  display: flex;
  align-items: center;
  justify-content: center;
}
.feature-card .icon-wrap svg {
  width: 28px;
  height: 28px;
  color: var(--primary);
}
.feature-card h3 {
  font-size: 22px;
  font-weight: 600;
  color: var(--text-primary);
  margin-top: 20px;
}
.feature-card p {
  font-size: 14px;
  color: var(--text-muted);
  margin-top: 12px;
  line-height: 1.7;
}

/* ===== Download Card ===== */
.download-card {
  background: var(--white);
  border-radius: var(--radius-md);
  padding: 28px;
  border: 1px solid var(--border-light);
  box-shadow: var(--shadow-sm);
  transition: all 0.3s ease;
}
.download-card:hover {
  box-shadow: var(--shadow-md);
}
.download-card .platform-icon {
  width: 48px;
  height: 48px;
  color: var(--primary);
}
.download-card h3 {
  font-size: 22px;
  font-weight: 600;
  color: var(--text-primary);
  margin-top: 16px;
}
.download-card .version-info {
  font-size: 14px;
  color: var(--text-muted);
  margin-top: 8px;
}
.download-card .requirements {
  font-size: 14px;
  color: var(--text-muted);
  margin-top: 4px;
}
.download-card .install-steps {
  margin-top: 16px;
  padding-left: 0;
}
.download-card .install-steps li {
  font-size: 14px;
  color: var(--text-muted);
  padding: 4px 0;
  padding-left: 24px;
  position: relative;
  counter-increment: step;
}
.download-card .install-steps li::before {
  content: counter(step);
  position: absolute;
  left: 0;
  top: 4px;
  width: 18px;
  height: 18px;
  border-radius: 50%;
  background: var(--primary-bg);
  color: var(--primary);
  font-size: 11px;
  font-weight: 600;
  display: flex;
  align-items: center;
  justify-content: center;
}
.download-card .btn {
  margin-top: 20px;
}
.download-card .badge {
  display: inline-block;
  background: var(--primary-bg);
  color: var(--primary);
  font-size: 12px;
  font-weight: 500;
  padding: 2px 10px;
  border-radius: 9999px;
  margin-left: 8px;
  vertical-align: middle;
}

/* ===== Testimonial Card ===== */
.testimonial-card {
  background: var(--white);
  border-radius: var(--radius-md);
  padding: 28px;
  border: 1px solid var(--border-light);
  box-shadow: var(--shadow-sm);
}
.testimonial-card .header {
  display: flex;
  align-items: center;
  gap: 12px;
}
.testimonial-card .avatar {
  width: 48px;
  height: 48px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 16px;
  font-weight: 600;
  color: var(--white);
  flex-shrink: 0;
}
.testimonial-card .name {
  font-size: 18px;
  font-weight: 600;
  color: var(--text-primary);
}
.testimonial-card .stars {
  display: flex;
  gap: 2px;
  margin-top: 2px;
}
.testimonial-card .stars svg {
  width: 16px;
  height: 16px;
}
.testimonial-card .quote {
  font-size: 14px;
  color: var(--text-muted);
  line-height: 1.7;
  margin-top: 16px;
  font-style: italic;
}

/* ===== FAQ Accordion ===== */
.faq-container {
  max-width: 800px;
  margin: 0 auto;
  background: var(--white);
  border-radius: var(--radius-md);
  border: 1px solid var(--border-light);
  overflow: hidden;
}
.faq-item {
  border-bottom: 1px solid var(--border-light);
}
.faq-item:last-child {
  border-bottom: none;
}
.faq-question {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 20px 24px;
  cursor: pointer;
  transition: background 0.2s ease;
}
.faq-question:hover {
  background: var(--bg);
}
.faq-question h4 {
  font-size: 18px;
  font-weight: 600;
  color: var(--text-primary);
  padding-right: 16px;
}
.faq-question .icon svg {
  width: 20px;
  height: 20px;
  color: var(--text-muted);
  transition: transform 0.3s ease;
  flex-shrink: 0;
}
.faq-item.open .faq-question .icon svg {
  transform: rotate(45deg);
}
.faq-answer {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.3s ease, opacity 0.3s ease;
  opacity: 0;
}
.faq-item.open .faq-answer {
  max-height: 500px;
  opacity: 1;
}
.faq-answer p {
  padding: 0 24px 20px;
  font-size: 14px;
  color: var(--text-muted);
  line-height: 1.7;
}

/* ===== Comparison Table ===== */
.comparison-table {
  max-width: 900px;
  margin: 0 auto;
  background: var(--white);
  border-radius: var(--radius-md);
  overflow: hidden;
  border: 1px solid var(--border-light);
}
.comparison-table table {
  width: 100%;
  border-collapse: collapse;
}
.comparison-table th {
  background: var(--primary-bg);
  color: var(--primary-dark);
  font-size: 16px;
  font-weight: 600;
  padding: 16px 20px;
  text-align: center;
}
.comparison-table th:first-child {
  text-align: left;
}
.comparison-table td {
  padding: 16px 20px;
  text-align: center;
  border-bottom: 1px solid var(--border-light);
  font-size: 14px;
}
.comparison-table td:first-child {
  text-align: left;
  font-weight: 600;
  color: var(--text-primary);
}
.comparison-table tr:nth-child(even) td {
  background: rgba(227, 242, 253, 0.2);
}
.comparison-table tr:nth-child(even) td:nth-child(2) {
  background: rgba(227, 242, 253, 0.5);
}
.comparison-table td:nth-child(2) {
  background: rgba(227, 242, 253, 0.3);
}
.comparison-table .check { color: var(--success); }
.comparison-table .circle { color: var(--primary); }
.comparison-table .triangle { color: var(--secondary); }
.comparison-table .cross { color: var(--border); }
.comparison-table .legend {
  padding: 16px 20px;
  font-size: 13px;
  color: var(--text-muted);
  text-align: center;
}

/* ===== CTA Banner ===== */
.cta-banner {
  background: linear-gradient(135deg, var(--primary) 0%, var(--primary-dark) 100%);
  padding: 80px 24px;
  text-align: center;
}
.cta-banner h2 {
  font-size: 42px;
  font-weight: 700;
  color: var(--white);
}
.cta-banner p {
  font-size: 16px;
  color: rgba(255,255,255,0.85);
  margin-top: 16px;
}
.cta-banner .btn {
  margin-top: 32px;
}
.cta-banner .trust {
  font-size: 14px;
  color: rgba(255,255,255,0.7);
  margin-top: 20px;
}

/* ===== Grid Systems ===== */
.grid-2 {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 24px;
}
.grid-3 {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}
.grid-4 {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
}

/* ===== Hero ===== */
.hero {
  position: relative;
  overflow: hidden;
  min-height: 560px;
  background: linear-gradient(135deg, var(--primary-bg) 0%, var(--white) 50%, var(--secondary-bg) 100%);
}
.hero-decoration {
  position: absolute;
  pointer-events: none;
}
.hero-stripe {
  top: -100px;
  right: -200px;
  width: 600px;
  height: 1200px;
  background: var(--primary);
  opacity: 0.04;
  transform: rotate(30deg);
}
.hero-circle-1 {
  top: 10%;
  left: -5%;
  width: 300px;
  height: 300px;
  border-radius: 50%;
  background: var(--primary);
  opacity: 0.06;
}
.hero-circle-2 {
  bottom: 20%;
  right: 10%;
  width: 200px;
  height: 200px;
  border-radius: 50%;
  background: var(--secondary);
  opacity: 0.08;
}
.hero-circle-3 {
  top: 30%;
  right: 25%;
  width: 120px;
  height: 120px;
  border-radius: 50%;
  background: var(--primary-light);
  opacity: 0.1;
}
.hero-content {
  position: relative;
  z-index: 1;
  max-width: 720px;
  margin: 0 auto;
  text-align: center;
  padding-top: 120px;
  padding-bottom: 80px;
}
.hero h1 {
  font-family: 'Playfair Display', serif;
  font-size: 56px;
  font-weight: 700;
  color: var(--text-primary);
  line-height: 1.15;
}
.hero .subtitle {
  font-size: 18px;
  color: var(--text-muted);
  margin-top: 20px;
  max-width: 600px;
  margin-left: auto;
  margin-right: auto;
}
.hero .cta-group {
  margin-top: 40px;
  display: flex;
  gap: 16px;
  justify-content: center;
  flex-wrap: wrap;
}
.hero .trust-bar {
  margin-top: 48px;
  display: flex;
  gap: 40px;
  justify-content: center;
  flex-wrap: wrap;
  font-size: 14px;
  color: var(--text-muted);
}
.hero .trust-bar span {
  display: flex;
  align-items: center;
  gap: 6px;
}

/* ===== Navigation ===== */
.nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  background: rgba(255,255,255,0.92);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border-light);
  height: 64px;
}
.nav .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 100%;
}
.nav-logo {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 18px;
  font-weight: 600;
  color: var(--text-primary);
}
.nav-logo .logo-icon {
  width: 20px;
  height: 20px;
}
.nav-links {
  display: flex;
  gap: 32px;
  align-items: center;
}
.nav-links a {
  font-size: 14px;
  font-weight: 500;
  color: var(--text-muted);
  padding-bottom: 2px;
  border-bottom: 2px solid transparent;
  transition: color 0.2s ease, border-color 0.2s ease;
}
.nav-links a:hover {
  color: var(--primary);
}
.nav-links a.active {
  color: var(--primary);
  border-bottom-color: var(--primary);
}
.nav .btn-sm {
  padding: 8px 18px;
  font-size: 14px;
}
.nav-toggle {
  display: none;
  background: none;
  border: none;
  padding: 8px;
}
.nav-toggle svg {
  width: 24px;
  height: 24px;
  color: var(--text-primary);
}
.nav-overlay {
  display: none;
  position: fixed;
  inset: 0;
  background: var(--white);
  z-index: 99;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 32px;
  opacity: 0;
  visibility: hidden;
  transition: opacity 0.25s ease, visibility 0.25s ease;
}
.nav-overlay.open {
  opacity: 1;
  visibility: visible;
}
.nav-overlay a {
  font-size: 24px;
  font-weight: 500;
  color: var(--text-primary);
}
.nav-overlay a.active {
  color: var(--primary);
}
.nav-overlay-close {
  position: absolute;
  top: 20px;
  right: 24px;
  background: none;
  border: none;
  padding: 8px;
}
.nav-overlay-close svg {
  width: 28px;
  height: 28px;
  color: var(--text-primary);
}

/* ===== Footer ===== */
.footer {
  background: var(--footer-bg);
  padding-top: 64px;
}
.footer-grid {
  display: grid;
  grid-template-columns: 1.5fr 1fr 1fr 1fr;
  gap: 48px;
  padding-bottom: 48px;
}
.footer-brand p {
  font-size: 14px;
  color: rgba(255,255,255,0.6);
  margin-top: 16px;
  line-height: 1.7;
}
.footer-brand .logo-icon {
  width: 20px;
  height: 20px;
}
.footer-brand .nav-logo {
  color: var(--white);
}
.footer-column h4 {
  font-size: 16px;
  font-weight: 600;
  color: var(--white);
  margin-bottom: 20px;
}
.footer-column a {
  display: block;
  font-size: 14px;
  color: rgba(255,255,255,0.6);
  padding: 6px 0;
  transition: color 0.2s ease;
}
.footer-column a:hover {
  color: var(--white);
}
.footer-bottom {
  border-top: 1px solid rgba(255,255,255,0.1);
  padding: 24px 0;
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 12px;
}
.footer-bottom p {
  font-size: 13px;
  color: rgba(255,255,255,0.5);
}

/* ===== Stats Section ===== */
.stats-bar {
  background: linear-gradient(135deg, var(--primary) 0%, var(--primary-dark) 100%);
  padding: 60px 0;
}
.stats-bar .grid-4 {
  text-align: center;
}
.stats-bar .stat-number {
  font-size: 48px;
  font-weight: 700;
  color: var(--white);
  line-height: 1;
}
.stats-bar .stat-label {
  font-size: 14px;
  color: rgba(255,255,255,0.8);
  margin-top: 8px;
}

/* ===== Platform Chips ===== */
.platform-chips {
  display: flex;
  gap: 16px;
  justify-content: center;
  flex-wrap: wrap;
  margin-top: 32px;
}
.platform-chip {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: var(--white);
  border: 1px solid var(--border);
  padding: 10px 20px;
  border-radius: 9999px;
  font-size: 14px;
  color: var(--text-body);
  transition: all 0.2s ease;
  cursor: pointer;
}
.platform-chip:hover {
  border-color: var(--primary);
  color: var(--primary);
}
.platform-chip svg {
  width: 20px;
  height: 20px;
}

/* ===== Timeline ===== */
.timeline {
  position: relative;
  padding-left: 60px;
}
.timeline::before {
  content: '';
  position: absolute;
  left: 20px;
  top: 0;
  bottom: 0;
  width: 2px;
  background: var(--primary-bg);
}
.timeline-item {
  position: relative;
  padding-bottom: 48px;
}
.timeline-item:last-child {
  padding-bottom: 0;
}
.timeline-number {
  position: absolute;
  left: -60px;
  top: 0;
  width: 42px;
  height: 42px;
  border-radius: 50%;
  background: var(--primary);
  color: var(--white);
  font-size: 18px;
  font-weight: 700;
  display: flex;
  align-items: center;
  justify-content: center;
}
.timeline-item h3 {
  font-size: 22px;
  font-weight: 600;
  color: var(--text-primary);
}
.timeline-item p {
  font-size: 15px;
  color: var(--text-muted);
  margin-top: 12px;
  line-height: 1.7;
}
.timeline-tip {
  margin-top: 16px;
  padding: 16px 20px;
  background: var(--primary-bg);
  border-radius: var(--radius-sm);
  border-left: 3px solid var(--primary);
  font-size: 14px;
  color: var(--text-muted);
  line-height: 1.6;
}

/* ===== Version Card ===== */
.version-card {
  background: var(--white);
  border-radius: var(--radius-md);
  padding: 24px;
  border: 1px solid var(--border-light);
}
.version-card .version-header {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 12px;
}
.version-card h3 {
  font-size: 20px;
  font-weight: 600;
  color: var(--text-primary);
}
.version-card .date {
  font-size: 14px;
  color: var(--text-muted);
}
.version-card .badge {
  display: inline-block;
  background: var(--success-bg);
  color: var(--success);
  font-size: 12px;
  font-weight: 500;
  padding: 2px 10px;
  border-radius: 9999px;
}
.version-card ul {
  list-style: disc;
  padding-left: 20px;
}
.version-card li {
  font-size: 14px;
  color: var(--text-muted);
  padding: 4px 0;
  line-height: 1.6;
}

/* ===== Step Card (for macOS guide) ===== */
.step-card {
  background: var(--white);
  border-radius: var(--radius-md);
  padding: 28px;
  border: 1px solid var(--border-light);
  box-shadow: var(--shadow-sm);
}
.step-card .number {
  width: 36px;
  height: 36px;
  border-radius: 50%;
  background: var(--primary);
  color: var(--white);
  font-size: 16px;
  font-weight: 700;
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 16px;
}
.step-card h3 {
  font-size: 18px;
  font-weight: 600;
  color: var(--text-primary);
}
.step-card p {
  font-size: 14px;
  color: var(--text-muted);
  margin-top: 8px;
  line-height: 1.7;
}

/* ===== Requirements Table ===== */
.requirements-table {
  max-width: 900px;
  margin: 0 auto;
  background: var(--white);
  border-radius: var(--radius-md);
  overflow: hidden;
  border: 1px solid var(--border-light);
}
.requirements-table table {
  width: 100%;
  border-collapse: collapse;
}
.requirements-table th {
  background: var(--primary-bg);
  color: var(--primary-dark);
  font-size: 14px;
  font-weight: 600;
  padding: 14px 16px;
  text-align: center;
}
.requirements-table th:first-child {
  text-align: left;
}
.requirements-table td {
  padding: 14px 16px;
  text-align: center;
  border-bottom: 1px solid var(--border-light);
  font-size: 14px;
  color: var(--text-muted);
}
.requirements-table td:first-child {
  text-align: left;
  font-weight: 500;
  color: var(--text-primary);
}
.requirements-table tr:last-child td {
  border-bottom: none;
}

/* ===== Tip Card (for zh-cn tips) ===== */
.tip-card {
  background: var(--white);
  border-radius: var(--radius-md);
  padding: 28px;
  border: 1px solid var(--border-light);
  box-shadow: var(--shadow-sm);
  transition: all 0.3s ease;
}
.tip-card:hover {
  box-shadow: var(--shadow-md);
  transform: translateY(-2px);
}
.tip-card h3 {
  font-size: 18px;
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: 12px;
}
.tip-card p {
  font-size: 14px;
  color: var(--text-muted);
  line-height: 1.7;
}

/* ===== Security Card ===== */
.security-card {
  background: var(--white);
  border-radius: var(--radius-md);
  padding: 32px;
  border: 1px solid var(--border-light);
  text-align: center;
  transition: all 0.3s ease;
}
.security-card:hover {
  box-shadow: var(--shadow-md);
  transform: translateY(-4px);
}
.security-card .icon-wrap {
  width: 56px;
  height: 56px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto;
}
.security-card .icon-wrap svg {
  width: 28px;
  height: 28px;
}
.security-card h3 {
  font-size: 20px;
  font-weight: 600;
  color: var(--text-primary);
  margin-top: 20px;
}
.security-card p {
  font-size: 14px;
  color: var(--text-muted);
  margin-top: 12px;
  line-height: 1.7;
}

/* ===== Feature Detail Block ===== */
.feature-detail {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 48px;
  align-items: center;
}
.feature-detail.reverse {
  direction: rtl;
}
.feature-detail.reverse > * {
  direction: ltr;
}
.feature-detail .text .overline {
  font-size: 12px;
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: 2px;
  color: var(--primary);
  margin-bottom: 12px;
}
.feature-detail .text h3 {
  font-size: 28px;
  font-weight: 600;
  color: var(--text-primary);
  line-height: 1.3;
}
.feature-detail .text p {
  font-size: 15px;
  color: var(--text-muted);
  margin-top: 16px;
  line-height: 1.7;
}
.feature-detail .text ul {
  margin-top: 20px;
  list-style: none;
}
.feature-detail .text ul li {
  font-size: 15px;
  color: var(--text-body);
  padding: 6px 0;
  padding-left: 28px;
  position: relative;
}
.feature-detail .text ul li::before {
  content: '';
  position: absolute;
  left: 0;
  top: 12px;
  width: 18px;
  height: 18px;
  background: var(--success);
  border-radius: 50%;
}
.feature-detail .text ul li::after {
  content: '';
  position: absolute;
  left: 5px;
  top: 14px;
  width: 6px;
  height: 10px;
  border: solid white;
  border-width: 0 2px 2px 0;
  transform: rotate(45deg);
}
.feature-detail .image img {
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-lg);
}

/* ===== Article Content ===== */
.article-content {
  max-width: 760px;
}
.article-content p {
  font-size: 16px;
  color: var(--text-body);
  line-height: 1.85;
  margin-bottom: 20px;
}

/* ===== Responsive ===== */
@media (max-width: 1024px) {
  .grid-4 { grid-template-columns: repeat(2, 1fr); }
  .footer-grid { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 768px) {
  .section { padding: 48px 0; }
  .hero { min-height: 480px; }
  .hero h1 { font-size: 36px; }
  .hero .subtitle { font-size: 16px; }
  .section-header h2 { font-size: 24px; }
  .grid-2, .grid-3, .grid-4 { grid-template-columns: 1fr; }
  .nav-links { display: none; }
  .nav-toggle { display: block; }
  .nav-overlay { display: flex; }
  .cta-banner h2 { font-size: 28px; }
  .stats-bar .stat-number { font-size: 36px; }
  .feature-detail { grid-template-columns: 1fr; }
  .feature-detail.reverse { direction: ltr; }
  .footer-grid { grid-template-columns: 1fr; gap: 32px; }
  .footer-bottom { flex-direction: column; text-align: center; }
  .comparison-table { overflow-x: auto; }
  .comparison-table table { min-width: 600px; }
  .requirements-table { overflow-x: auto; }
  .requirements-table table { min-width: 600px; }
  .timeline { padding-left: 50px; }
  .timeline-number { left: -50px; width: 36px; height: 36px; font-size: 15px; }
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
  .animate-on-scroll {
    opacity: 1;
    transform: none;
  }
}