/* ========== CSS Variables - Light Material Design 3 ========== */
:root {
  --primary: #1a73e8;
  --primary-light: #e8f0fe;
  --primary-dark: #1557b0;
  --chrome-red: #ea4335;
  --chrome-yellow: #fbbc04;
  --chrome-green: #34a853;
  --chrome-blue: #4285f4;
  --bg-white: #ffffff;
  --bg-gray: #f8f9fa;
  --bg-card: #ffffff;
  --text-primary: #202124;
  --text-secondary: #5f6368;
  --text-muted: #80868b;
  --border-light: #dadce0;
  --border-hover: #bdc1c6;
  --shadow-sm: 0 1px 2px rgba(60,64,67,0.1), 0 1px 3px rgba(60,64,67,0.08);
  --shadow-md: 0 1px 3px rgba(60,64,67,0.12), 0 4px 8px rgba(60,64,67,0.08);
  --shadow-lg: 0 2px 6px rgba(60,64,67,0.12), 0 8px 24px rgba(60,64,67,0.12);
  --shadow-xl: 0 4px 12px rgba(60,64,67,0.15), 0 16px 40px rgba(60,64,67,0.12);
  --radius: 12px;
  --radius-lg: 24px;
  --radius-full: 100px;
  --transition: 0.2s ease;
  --transition-slow: 0.35s cubic-bezier(0.4, 0, 0.2, 1);
}

/* ========== Reset & Base ========== */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
body {
  font-family: "Google Sans", -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  background: var(--bg-white);
  color: var(--text-primary);
  line-height: 1.6;
  min-height: 100vh;
  overflow-x: hidden;
}
a { color: inherit; text-decoration: none; }
button { font-family: inherit; cursor: pointer; border: none; background: none; }
img { max-width: 100%; display: block; }
ul { list-style: none; }

/* ========== Layout ========== */
.container { max-width: 1280px; margin: 0 auto; padding: 0 24px; }

/* ========== 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 pulse { 0%, 100% { transform: scale(1); } 50% { transform: scale(1.05); } }
@keyframes slideIn { from { opacity: 0; transform: translateX(-10px); } to { opacity: 1; transform: translateX(0); } }
@keyframes bounce { 0%, 100% { transform: translateY(0); } 50% { transform: translateY(-8px); } }

/* ========== Navigation ========== */
.navbar {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  background: var(--bg-white);
  border-bottom: 1px solid var(--border-light);
  transition: var(--transition);
}
.navbar.scrolled {
  box-shadow: var(--shadow-sm);
}
.navbar .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 64px;
}
.logo {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 1.125rem;
  font-weight: 500;
  color: var(--text-primary);
}
.logo svg { width: 32px; height: 32px; }
.nav-links {
  display: flex;
  align-items: center;
  gap: 4px;
}
.nav-links a {
  padding: 10px 16px;
  border-radius: var(--radius-full);
  font-size: 0.9375rem;
  font-weight: 500;
  color: var(--text-secondary);
  transition: var(--transition);
}
.nav-links a:hover {
  color: var(--text-primary);
  background: var(--bg-gray);
}
.nav-links a.active {
  color: var(--primary);
  background: var(--primary-light);
}

/* ========== Buttons ========== */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 12px 24px;
  border-radius: var(--radius-full);
  font-size: 0.9375rem;
  font-weight: 500;
  transition: var(--transition);
  white-space: nowrap;
}
.btn svg { width: 20px; height: 20px; }
.btn-primary {
  background: var(--primary);
  color: #fff;
  box-shadow: var(--shadow-sm);
}
.btn-primary:hover {
  background: var(--primary-dark);
  box-shadow: var(--shadow-md);
  transform: translateY(-1px);
}
.btn-secondary {
  background: var(--primary-light);
  color: var(--primary);
}
.btn-secondary:hover {
  background: #d2e3fc;
}
.btn-outline {
  border: 1px solid var(--border-light);
  color: var(--primary);
  background: var(--bg-white);
}
.btn-outline:hover {
  border-color: var(--primary);
  background: var(--primary-light);
}
.btn-large {
  padding: 16px 32px;
  font-size: 1rem;
}
.btn-white {
  background: #fff;
  color: var(--primary);
  box-shadow: var(--shadow-md);
}
.btn-white:hover {
  box-shadow: var(--shadow-lg);
  transform: translateY(-2px);
}

/* ========== Hero Section ========== */
.hero {
  padding: 120px 0 80px;
  background: linear-gradient(180deg, var(--primary-light) 0%, var(--bg-white) 100%);
  overflow: hidden;
}
.hero-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 60px;
  align-items: center;
}
.hero-content h1 {
  font-size: clamp(2.5rem, 5vw, 3.5rem);
  font-weight: 400;
  line-height: 1.2;
  margin-bottom: 20px;
  color: var(--text-primary);
}
.hero-content h1 strong {
  font-weight: 500;
  color: var(--primary);
}
.hero-content .lead {
  font-size: 1.125rem;
  color: var(--text-secondary);
  margin-bottom: 32px;
  max-width: 480px;
  line-height: 1.7;
}
.hero-actions {
  display: flex;
  gap: 16px;
  flex-wrap: wrap;
}
.hero-visual {
  position: relative;
  display: flex;
  justify-content: center;
}
.browser-mockup {
  width: 100%;
  max-width: 560px;
  background: var(--bg-white);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-xl);
  overflow: hidden;
  animation: fadeInUp 0.8s ease;
}
.browser-toolbar {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 12px 16px;
  background: var(--bg-gray);
  border-bottom: 1px solid var(--border-light);
}
.browser-dots {
  display: flex;
  gap: 6px;
}
.browser-dots span {
  width: 12px;
  height: 12px;
  border-radius: 50%;
}
.browser-dots span:nth-child(1) { background: #ea4335; }
.browser-dots span:nth-child(2) { background: #fbbc04; }
.browser-dots span:nth-child(3) { background: #34a853; }
.browser-address {
  flex: 1;
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 8px 12px;
  background: var(--bg-white);
  border-radius: var(--radius-full);
  font-size: 0.875rem;
  color: var(--text-secondary);
}
.browser-address svg { width: 16px; height: 16px; stroke: var(--chrome-green); }
.browser-body {
  padding: 32px;
  min-height: 280px;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  text-align: center;
  background: linear-gradient(135deg, #f8f9fa 0%, #fff 100%);
}
.browser-body svg { width: 80px; height: 80px; margin-bottom: 16px; }
.browser-body h3 { font-size: 1.25rem; font-weight: 500; margin-bottom: 8px; }
.browser-body p { font-size: 0.875rem; color: var(--text-secondary); }

/* ========== Trust Bar ========== */
.trust-bar {
  padding: 40px 0;
  background: var(--bg-white);
  border-bottom: 1px solid var(--border-light);
}
.trust-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 32px;
}
.trust-item {
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  padding: 20px;
}
.trust-icon {
  width: 48px;
  height: 48px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 12px;
}
.trust-icon svg { width: 24px; height: 24px; }
.trust-icon.blue { background: #e8f0fe; }
.trust-icon.blue svg { stroke: var(--chrome-blue); }
.trust-icon.green { background: #e6f4ea; }
.trust-icon.green svg { stroke: var(--chrome-green); }
.trust-icon.yellow { background: #fef7e0; }
.trust-icon.yellow svg { stroke: #f9a825; }
.trust-icon.red { background: #fce8e6; }
.trust-icon.red svg { stroke: var(--chrome-red); }
.trust-item h4 {
  font-size: 1.5rem;
  font-weight: 500;
  margin-bottom: 4px;
  color: var(--text-primary);
}
.trust-item p {
  font-size: 0.875rem;
  color: var(--text-secondary);
}

/* ========== Features Section ========== */
.features {
  padding: 100px 0;
  background: var(--bg-gray);
}
.section-header {
  text-align: center;
  margin-bottom: 60px;
}
.section-header h2 {
  font-size: clamp(1.75rem, 3vw, 2.25rem);
  font-weight: 400;
  margin-bottom: 12px;
  color: var(--text-primary);
}
.section-header p {
  font-size: 1.0625rem;
  color: var(--text-secondary);
  max-width: 600px;
  margin: 0 auto;
}
.feature-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}
.feature-card {
  background: var(--bg-white);
  border-radius: var(--radius);
  padding: 32px;
  transition: var(--transition-slow);
  border: 1px solid transparent;
}
.feature-card:hover {
  box-shadow: var(--shadow-lg);
  transform: translateY(-4px);
  border-color: var(--border-light);
}
.feature-icon {
  width: 56px;
  height: 56px;
  border-radius: var(--radius);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 20px;
}
.feature-icon svg { width: 28px; height: 28px; }
.feature-icon.speed { background: linear-gradient(135deg, #e8f0fe, #d2e3fc); }
.feature-icon.speed svg { stroke: var(--chrome-blue); }
.feature-icon.security { background: linear-gradient(135deg, #e6f4ea, #ceead6); }
.feature-icon.security svg { stroke: var(--chrome-green); }
.feature-icon.sync { background: linear-gradient(135deg, #fef7e0, #feefc3); }
.feature-icon.sync svg { stroke: #f9a825; }
.feature-icon.extensions { background: linear-gradient(135deg, #fce8e6, #f8d7da); }
.feature-icon.extensions svg { stroke: var(--chrome-red); }
.feature-icon.translate { background: linear-gradient(135deg, #e8f0fe, #d2e3fc); }
.feature-icon.translate svg { stroke: var(--primary); }
.feature-icon.privacy { background: linear-gradient(135deg, #e0e0e0, #f5f5f5); }
.feature-icon.privacy svg { stroke: var(--text-secondary); }
.feature-card h3 {
  font-size: 1.125rem;
  font-weight: 500;
  margin-bottom: 12px;
  color: var(--text-primary);
}
.feature-card p {
  font-size: 0.9375rem;
  color: var(--text-secondary);
  line-height: 1.65;
}

/* ========== Download Section ========== */
.download-section {
  padding: 100px 0;
  background: var(--bg-white);
}
.download-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
}
.download-card {
  background: var(--bg-white);
  border: 1px solid var(--border-light);
  border-radius: var(--radius);
  padding: 28px 24px;
  text-align: center;
  transition: var(--transition);
  position: relative;
}
.download-card:hover {
  border-color: var(--primary);
  box-shadow: var(--shadow-md);
}
.download-card.featured {
  border-color: var(--primary);
  border-width: 2px;
  background: linear-gradient(180deg, var(--primary-light) 0%, var(--bg-white) 50%);
}
.download-card.featured::before {
  content: '推荐下载';
  position: absolute;
  top: -12px;
  left: 50%;
  transform: translateX(-50%);
  background: var(--primary);
  color: #fff;
  font-size: 0.75rem;
  font-weight: 500;
  padding: 4px 14px;
  border-radius: var(--radius-full);
}
.download-icon {
  width: 64px;
  height: 64px;
  margin: 0 auto 16px;
  display: flex;
  align-items: center;
  justify-content: center;
}
.download-icon svg { width: 48px; height: 48px; fill: var(--text-primary); }
.download-card h4 {
  font-size: 1.125rem;
  font-weight: 500;
  margin-bottom: 6px;
}
.download-card .version {
  font-size: 0.8125rem;
  color: var(--text-muted);
  margin-bottom: 20px;
}
.download-card .btn { width: 100%; }

/* ========== Reviews Section ========== */
.reviews {
  padding: 100px 0;
  background: var(--bg-gray);
}
.reviews-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}
.review-card {
  background: var(--bg-white);
  border-radius: var(--radius);
  padding: 28px;
  box-shadow: var(--shadow-sm);
  transition: var(--transition);
}
.review-card:hover {
  box-shadow: var(--shadow-md);
}
.review-stars {
  display: flex;
  gap: 2px;
  margin-bottom: 16px;
}
.review-stars svg {
  width: 18px;
  height: 18px;
  fill: var(--chrome-yellow);
}
.review-card blockquote {
  font-size: 0.9375rem;
  color: var(--text-secondary);
  line-height: 1.7;
  margin-bottom: 20px;
}
.review-author {
  display: flex;
  align-items: center;
  gap: 12px;
}
.review-avatar {
  width: 40px;
  height: 40px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 500;
  font-size: 0.875rem;
  color: #fff;
}
.review-avatar.blue { background: var(--chrome-blue); }
.review-avatar.green { background: var(--chrome-green); }
.review-avatar.red { background: var(--chrome-red); }
.review-avatar.yellow { background: #f9a825; }
.review-meta strong {
  display: block;
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--text-primary);
}
.review-meta span {
  font-size: 0.8125rem;
  color: var(--text-muted);
}

/* ========== FAQ Section ========== */
.faq {
  padding: 100px 0;
  background: var(--bg-white);
}
.faq-list {
  max-width: 800px;
  margin: 0 auto;
}
.faq-item {
  border-bottom: 1px solid var(--border-light);
}
.faq-item:first-child {
  border-top: 1px solid var(--border-light);
}
.faq-question {
  width: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 20px 0;
  font-size: 1rem;
  font-weight: 500;
  color: var(--text-primary);
  text-align: left;
  transition: var(--transition);
}
.faq-question:hover {
  color: var(--primary);
}
.faq-question svg {
  width: 24px;
  height: 24px;
  stroke: var(--text-secondary);
  transition: var(--transition);
  flex-shrink: 0;
}
.faq-item.open .faq-question svg {
  transform: rotate(180deg);
  stroke: var(--primary);
}
.faq-answer {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.3s ease;
}
.faq-item.open .faq-answer {
  max-height: 500px;
}
.faq-answer p {
  padding-bottom: 20px;
  font-size: 0.9375rem;
  color: var(--text-secondary);
  line-height: 1.7;
}

/* ========== CTA Section ========== */
.cta-section {
  padding: 80px 0;
  background: linear-gradient(135deg, var(--primary) 0%, #1557b0 100%);
  text-align: center;
}
.cta-section h2 {
  font-size: clamp(1.75rem, 3vw, 2.25rem);
  font-weight: 400;
  color: #fff;
  margin-bottom: 16px;
}
.cta-section p {
  font-size: 1.0625rem;
  color: rgba(255,255,255,0.85);
  margin-bottom: 32px;
  max-width: 500px;
  margin-left: auto;
  margin-right: auto;
}

/* ========== Footer ========== */
.footer {
  padding: 60px 0 40px;
  background: var(--bg-gray);
  border-top: 1px solid var(--border-light);
}
.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: 48px;
  margin-bottom: 48px;
}
.footer-brand {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 1.125rem;
  font-weight: 500;
  margin-bottom: 16px;
}
.footer-brand svg { width: 28px; height: 28px; }
.footer-desc {
  font-size: 0.875rem;
  color: var(--text-secondary);
  line-height: 1.7;
  max-width: 300px;
}
.footer-col h5 {
  font-size: 0.8125rem;
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  color: var(--text-secondary);
  margin-bottom: 16px;
}
.footer-col ul li {
  margin-bottom: 10px;
}
.footer-col a {
  font-size: 0.875rem;
  color: var(--text-secondary);
  transition: var(--transition);
}
.footer-col a:hover {
  color: var(--primary);
}
.footer-bottom {
  padding-top: 32px;
  border-top: 1px solid var(--border-light);
  text-align: center;
}
.security-notice {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: #e6f4ea;
  border-radius: var(--radius-full);
  padding: 10px 20px;
  margin-bottom: 16px;
  font-size: 0.875rem;
  color: var(--chrome-green);
}
.security-notice svg {
  width: 18px;
  height: 18px;
  stroke: var(--chrome-green);
}
.copyright {
  font-size: 0.8125rem;
  color: var(--text-muted);
}

/* ========== Download Page ========== */
.download-hero {
  padding: 120px 0 60px;
  background: linear-gradient(180deg, var(--primary-light) 0%, var(--bg-white) 100%);
  text-align: center;
}
.download-hero h1 {
  font-size: clamp(2rem, 4vw, 2.75rem);
  font-weight: 400;
  margin-bottom: 16px;
}
.download-hero .lead {
  font-size: 1.0625rem;
  color: var(--text-secondary);
  max-width: 600px;
  margin: 0 auto 40px;
}
.main-download {
  max-width: 560px;
  margin: 0 auto;
  background: var(--bg-white);
  border-radius: var(--radius-lg);
  padding: 48px;
  box-shadow: var(--shadow-xl);
  text-align: center;
}
.main-download h2 {
  font-size: 1.5rem;
  font-weight: 500;
  margin-bottom: 8px;
}
.main-download .version-info {
  font-size: 0.9375rem;
  color: var(--text-secondary);
  margin-bottom: 28px;
}
.main-download .btn { font-size: 1.0625rem; padding: 16px 40px; }
.download-features {
  display: flex;
  justify-content: center;
  gap: 24px;
  margin-top: 28px;
  flex-wrap: wrap;
}
.download-features span {
  display: flex;
  align-items: center;
  gap: 6px;
  font-size: 0.875rem;
  color: var(--text-secondary);
}
.download-features svg {
  width: 18px;
  height: 18px;
  stroke: var(--chrome-green);
}

/* ========== Other Platforms ========== */
.other-platforms {
  padding: 80px 0;
}

/* ========== System Requirements ========== */
.requirements {
  padding: 80px 0;
  background: var(--bg-gray);
}
.requirements-tabs {
  display: flex;
  justify-content: center;
  gap: 8px;
  margin-bottom: 40px;
}
.tab-btn {
  padding: 10px 24px;
  border-radius: var(--radius-full);
  font-size: 0.9375rem;
  font-weight: 500;
  color: var(--text-secondary);
  border: 1px solid var(--border-light);
  background: var(--bg-white);
  transition: var(--transition);
}
.tab-btn:hover {
  border-color: var(--primary);
  color: var(--primary);
}
.tab-btn.active {
  background: var(--primary);
  border-color: var(--primary);
  color: #fff;
}
.tab-panel {
  display: none;
}
.tab-panel.active {
  display: block;
  animation: fadeInUp 0.4s ease;
}
.requirements-list {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 16px;
  max-width: 700px;
  margin: 0 auto;
}
.req-item {
  display: flex;
  align-items: flex-start;
  gap: 16px;
  background: var(--bg-white);
  border-radius: var(--radius);
  padding: 20px;
  border: 1px solid var(--border-light);
}
.req-item svg {
  width: 24px;
  height: 24px;
  stroke: var(--primary);
  flex-shrink: 0;
}
.req-item strong {
  display: block;
  font-size: 0.9375rem;
  font-weight: 500;
  margin-bottom: 4px;
}
.req-item span {
  font-size: 0.875rem;
  color: var(--text-secondary);
}

/* ========== Installation Steps ========== */
.install-steps {
  padding: 80px 0;
}
.steps-timeline {
  max-width: 600px;
  margin: 0 auto;
}
.step-item {
  display: flex;
  gap: 24px;
  padding-bottom: 40px;
  position: relative;
}
.step-item:last-child { padding-bottom: 0; }
.step-item::before {
  content: '';
  position: absolute;
  left: 19px;
  top: 48px;
  bottom: 0;
  width: 2px;
  background: var(--border-light);
}
.step-item:last-child::before { display: none; }
.step-number {
  width: 40px;
  height: 40px;
  border-radius: 50%;
  background: var(--primary);
  color: #fff;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 500;
  flex-shrink: 0;
  position: relative;
  z-index: 1;
}
.step-content h4 {
  font-size: 1.0625rem;
  font-weight: 500;
  margin-bottom: 8px;
  padding-top: 8px;
}
.step-content p {
  font-size: 0.9375rem;
  color: var(--text-secondary);
  line-height: 1.65;
}

/* ========== SEO Article Page ========== */
.article-hero {
  padding: 120px 0 40px;
  background: linear-gradient(180deg, var(--primary-light) 0%, var(--bg-white) 100%);
}
.article-hero h1 {
  font-size: clamp(1.75rem, 3.5vw, 2.25rem);
  font-weight: 400;
  margin-bottom: 16px;
  max-width: 800px;
}
.article-meta {
  display: flex;
  align-items: center;
  gap: 20px;
  font-size: 0.875rem;
  color: var(--text-secondary);
}
.article-meta span {
  display: flex;
  align-items: center;
  gap: 6px;
}
.article-meta svg { width: 16px; height: 16px; }

.article-content {
  padding: 60px 0;
}
.article-body {
  max-width: 800px;
  margin: 0 auto;
}
.article-body h2 {
  font-size: 1.5rem;
  font-weight: 500;
  margin: 48px 0 20px;
  color: var(--text-primary);
  padding-left: 16px;
  border-left: 4px solid var(--primary);
}
.article-body h3 {
  font-size: 1.1875rem;
  font-weight: 500;
  margin: 32px 0 12px;
}
.article-body p {
  font-size: 1rem;
  color: var(--text-secondary);
  line-height: 1.8;
  margin-bottom: 20px;
}
.article-body ul {
  margin: 20px 0;
  padding-left: 20px;
}
.article-body li {
  font-size: 1rem;
  color: var(--text-secondary);
  margin-bottom: 12px;
  position: relative;
  padding-left: 12px;
}
.article-body li::before {
  content: '';
  position: absolute;
  left: -8px;
  top: 10px;
  width: 6px;
  height: 6px;
  background: var(--primary);
  border-radius: 50%;
}

/* ========== Comparison Table ========== */
.comparison-table {
  width: 100%;
  border-collapse: collapse;
  margin: 32px 0;
  background: var(--bg-white);
  border-radius: var(--radius);
  overflow: hidden;
  box-shadow: var(--shadow-sm);
}
.comparison-table th,
.comparison-table td {
  padding: 16px 20px;
  text-align: left;
  border-bottom: 1px solid var(--border-light);
}
.comparison-table th {
  background: var(--bg-gray);
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--text-primary);
}
.comparison-table td {
  font-size: 0.9375rem;
  color: var(--text-secondary);
}
.comparison-table tr:last-child td { border-bottom: none; }
.comparison-table .check { color: var(--chrome-green); }
.comparison-table .cross { color: var(--text-muted); }

/* ========== Article CTA ========== */
.article-cta {
  background: linear-gradient(135deg, var(--primary-light) 0%, #d2e3fc 100%);
  border-radius: var(--radius-lg);
  padding: 48px;
  text-align: center;
  margin: 48px 0;
}
.article-cta h3 {
  font-size: 1.5rem;
  font-weight: 500;
  margin-bottom: 12px;
}
.article-cta p {
  font-size: 1rem;
  color: var(--text-secondary);
  margin-bottom: 24px;
}

/* ========== Version Timeline ========== */
.version-list {
  margin: 32px 0;
  border-left: 2px solid var(--border-light);
  padding-left: 24px;
}
.version-item {
  position: relative;
  padding-bottom: 24px;
}
.version-item:last-child { padding-bottom: 0; }
.version-item::before {
  content: '';
  position: absolute;
  left: -29px;
  top: 6px;
  width: 10px;
  height: 10px;
  background: var(--primary);
  border-radius: 50%;
}
.version-item h4 {
  font-size: 1rem;
  font-weight: 500;
  margin-bottom: 6px;
}
.version-item p {
  font-size: 0.9375rem;
  margin-bottom: 0;
}

/* ========== Responsive ========== */
@media (max-width: 1024px) {
  .hero-grid { grid-template-columns: 1fr; text-align: center; }
  .hero-content .lead { margin: 0 auto 32px; }
  .hero-actions { justify-content: center; }
  .hero-visual { order: -1; margin-bottom: 40px; }
  .browser-mockup { max-width: 480px; }
  .feature-grid { grid-template-columns: repeat(2, 1fr); }
  .trust-grid { grid-template-columns: repeat(2, 1fr); }
  .download-grid { grid-template-columns: repeat(2, 1fr); }
  .reviews-grid { grid-template-columns: repeat(2, 1fr); }
  .footer-grid { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 768px) {
  .container { padding: 0 16px; }
  .nav-links { display: none; }
  .hero { padding: 100px 0 60px; }
  .feature-grid { grid-template-columns: 1fr; }
  .trust-grid { grid-template-columns: 1fr 1fr; gap: 16px; }
  .download-grid { grid-template-columns: 1fr; }
  .reviews-grid { grid-template-columns: 1fr; }
  .footer-grid { grid-template-columns: 1fr; gap: 32px; }
  .requirements-list { grid-template-columns: 1fr; }
  .main-download { padding: 32px 24px; }
}
@media (max-width: 480px) {
  .hero-content h1 { font-size: 2rem; }
  .browser-mockup { border-radius: var(--radius); }
  .btn { padding: 10px 20px; font-size: 0.875rem; }
  .btn-large { padding: 14px 28px; font-size: 0.9375rem; }
}