/* === Site 1: Clean & Minimal - Safe Download Center === */
:root {
  --primary: #1a73e8;
  --primary-dark: #1557b0;
  --primary-light: #e8f0fe;
  --accent: #34a853;
  --text: #202124;
  --text-secondary: #5f6368;
  --bg: #ffffff;
  --bg-secondary: #f8f9fa;
  --bg-card: #ffffff;
  --border: #dadce0;
  --shadow: 0 1px 2px 0 rgba(60,64,67,0.1), 0 1px 3px 1px rgba(60,64,67,0.05);
  --shadow-hover: 0 4px 12px rgba(60,64,67,0.15);
  --radius: 8px;
  --radius-lg: 12px;
  --max-width: 1200px;
  --nav-height: 64px;
}

*, *::before, *::after { margin: 0; padding: 0; box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  color: var(--text);
  background: var(--bg);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

/* Navigation */
nav {
  position: sticky;
  top: 0;
  z-index: 1000;
  background: var(--bg);
  border-bottom: 1px solid var(--border);
  height: var(--nav-height);
}
.nav-container {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 100%;
}
.nav-brand {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 1.25rem;
  font-weight: 600;
  color: var(--text);
  text-decoration: none;
}
.nav-brand svg { width: 28px; height: 28px; }
.nav-links {
  display: flex;
  list-style: none;
  gap: 4px;
}
.nav-links a {
  display: block;
  padding: 8px 18px;
  border-radius: 20px;
  text-decoration: none;
  color: var(--text-secondary);
  font-size: 0.95rem;
  font-weight: 500;
  transition: all 0.2s ease;
}
.nav-links a:hover { color: var(--primary); background: var(--primary-light); }
.nav-links a.active { color: var(--primary); background: var(--primary-light); }

/* Hero */
.hero {
  background: linear-gradient(180deg, var(--primary-light) 0%, var(--bg) 100%);
  padding: 80px 24px 60px;
  text-align: center;
}
.hero-container { max-width: var(--max-width); margin: 0 auto; }
.hero h1 {
  font-size: 3rem;
  font-weight: 700;
  color: var(--text);
  margin-bottom: 16px;
  line-height: 1.2;
}
.hero .subtitle {
  font-size: 1.2rem;
  color: var(--text-secondary);
  max-width: 640px;
  margin: 0 auto 32px;
}
.hero-version {
  display: inline-flex;
  align-items: center;
  gap: 16px;
  background: var(--bg);
  padding: 8px 20px;
  border-radius: 24px;
  font-size: 0.9rem;
  color: var(--text-secondary);
  margin-bottom: 24px;
  border: 1px solid var(--border);
}
.hero-badges { display: flex; justify-content: center; gap: 24px; margin-bottom: 32px; }
.badge { display: flex; align-items: center; gap: 6px; font-size: 0.9rem; color: var(--text-secondary); }
.badge svg { width: 18px; height: 18px; color: var(--accent); }

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 14px 32px;
  border-radius: var(--radius);
  font-size: 1rem;
  font-weight: 600;
  text-decoration: none;
  border: none;
  cursor: pointer;
  transition: all 0.2s ease;
}
.btn-primary {
  background: var(--primary);
  color: #fff;
}
.btn-primary:hover { background: var(--primary-dark); transform: translateY(-1px); box-shadow: var(--shadow-hover); }
.btn-secondary {
  background: var(--bg);
  color: var(--primary);
  border: 1px solid var(--border);
}
.btn-secondary:hover { background: var(--primary-light); border-color: var(--primary); }
.btn svg, .btn-icon svg { width: 20px; height: 20px; }

/* Sections */
section { padding: 60px 24px; }
.section-container { max-width: var(--max-width); margin: 0 auto; }
.section-header { text-align: center; margin-bottom: 48px; }
.section-header h2 { font-size: 2rem; font-weight: 700; margin-bottom: 12px; }
.section-header p { color: var(--text-secondary); font-size: 1.1rem; }

/* Feature Cards */
.features-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
  gap: 24px;
}
.feature-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 32px;
  transition: all 0.25s ease;
}
.feature-card:hover { box-shadow: var(--shadow-hover); transform: translateY(-2px); }
.feature-icon {
  width: 48px; height: 48px;
  background: var(--primary-light);
  border-radius: var(--radius);
  display: flex; align-items: center; justify-content: center;
  margin-bottom: 16px;
}
.feature-icon svg { width: 24px; height: 24px; color: var(--primary); }
.feature-card h3 { font-size: 1.15rem; font-weight: 600; margin-bottom: 8px; }
.feature-card p { color: var(--text-secondary); font-size: 0.95rem; line-height: 1.6; }

/* Platform Cards */
.platforms-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 20px;
}
.platform-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 28px;
  text-align: center;
  transition: all 0.2s ease;
}
.platform-card:hover { box-shadow: var(--shadow-hover); }
.platform-icon { margin-bottom: 12px; }
.platform-icon svg { width: 40px; height: 40px; color: var(--primary); }
.platform-card h4 { font-size: 1.1rem; margin-bottom: 6px; }
.platform-card p { font-size: 0.85rem; color: var(--text-secondary); margin-bottom: 16px; }
.platform-card .btn { padding: 10px 20px; font-size: 0.9rem; }

/* Deep Features */
.deep-features { background: var(--bg-secondary); }
.deep-feature {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 48px;
  align-items: center;
  margin-bottom: 48px;
}
.deep-feature:nth-child(even) { direction: rtl; }
.deep-feature:nth-child(even) > * { direction: ltr; }
.deep-feature h3 { font-size: 1.5rem; margin-bottom: 12px; }
.deep-feature p { color: var(--text-secondary); margin-bottom: 12px; }
.deep-feature-visual {
  background: linear-gradient(135deg, var(--primary-light), #fff);
  border-radius: var(--radius-lg);
  height: 240px;
  display: flex;
  align-items: center;
  justify-content: center;
}
.deep-feature-visual svg { width: 80px; height: 80px; color: var(--primary); opacity: 0.4; }

/* Stats */
.stats-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 24px;
}
.stat-item { text-align: center; padding: 24px; }
.stat-number { font-size: 2.5rem; font-weight: 700; color: var(--primary); }
.stat-label { color: var(--text-secondary); font-size: 0.95rem; margin-top: 4px; }

/* Reviews */
.reviews-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 20px;
}
.review-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 24px;
}
.review-stars { color: #fbbc04; margin-bottom: 8px; display: flex; gap: 2px; }
.review-stars svg { width: 16px; height: 16px; fill: currentColor; }
.review-text { color: var(--text-secondary); font-size: 0.95rem; margin-bottom: 12px; }
.review-author { font-weight: 600; font-size: 0.9rem; }

/* Comparison Table */
.comparison-table { width: 100%; border-collapse: collapse; margin-top: 24px; }
.comparison-table th, .comparison-table td {
  padding: 14px 16px;
  text-align: left;
  border-bottom: 1px solid var(--border);
}
.comparison-table th { background: var(--bg-secondary); font-weight: 600; font-size: 0.9rem; }
.comparison-table tr:hover { background: var(--bg-secondary); }
.comparison-table .check { color: var(--accent); }
.comparison-table .cross { color: #ea4335; }
.comparison-table svg { width: 18px; height: 18px; }

/* Scenarios */
.scenarios-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 20px;
}
.scenario-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 28px;
  text-align: center;
}
.scenario-icon { margin-bottom: 12px; }
.scenario-icon svg { width: 36px; height: 36px; color: var(--primary); }
.scenario-card h4 { margin-bottom: 8px; }
.scenario-card p { font-size: 0.9rem; color: var(--text-secondary); }

/* FAQ */
.faq-item {
  border-bottom: 1px solid var(--border);
  padding: 20px 0;
}
.faq-item h3 {
  font-size: 1.05rem;
  font-weight: 600;
  cursor: pointer;
  display: flex;
  justify-content: space-between;
  align-items: center;
}
.faq-item h3::after {
  content: '+';
  font-size: 1.5rem;
  color: var(--text-secondary);
  transition: transform 0.2s;
}
.faq-item.active h3::after { transform: rotate(45deg); }
.faq-answer {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.3s ease;
  color: var(--text-secondary);
  font-size: 0.95rem;
  line-height: 1.7;
}
.faq-item.active .faq-answer { max-height: 500px; padding-top: 12px; }

/* Download Page Specific */
.download-hero {
  background: linear-gradient(135deg, var(--primary-light), var(--bg));
  padding: 60px 24px;
  text-align: center;
}
.download-main { max-width: 600px; margin: 0 auto; }
.download-main h1 { font-size: 2.2rem; margin-bottom: 16px; }
.download-meta {
  display: flex;
  justify-content: center;
  gap: 24px;
  margin: 20px 0;
  font-size: 0.9rem;
  color: var(--text-secondary);
}
.download-meta span { display: flex; align-items: center; gap: 6px; }
.sys-req-table { width: 100%; border-collapse: collapse; margin-top: 24px; }
.sys-req-table th, .sys-req-table td {
  padding: 12px 16px;
  border: 1px solid var(--border);
  text-align: left;
}
.sys-req-table th { background: var(--bg-secondary); font-weight: 600; }

/* Version History */
.version-item {
  display: flex;
  gap: 24px;
  padding: 20px 0;
  border-bottom: 1px solid var(--border);
}
.version-date { min-width: 120px; font-size: 0.85rem; color: var(--text-secondary); }
.version-content h4 { font-size: 1rem; margin-bottom: 6px; }
.version-content p { color: var(--text-secondary); font-size: 0.9rem; }

/* Install Steps */
.steps-container { counter-reset: step; }
.step-item {
  display: flex;
  gap: 20px;
  margin-bottom: 28px;
  align-items: flex-start;
}
.step-number {
  width: 40px; height: 40px;
  background: var(--primary);
  color: #fff;
  border-radius: 50%;
  display: flex; align-items: center; justify-content: center;
  font-weight: 700;
  flex-shrink: 0;
}
.step-content h4 { margin-bottom: 6px; }
.step-content p { color: var(--text-secondary); font-size: 0.95rem; }

/* CTA Box */
.cta-box {
  background: linear-gradient(135deg, var(--primary), var(--primary-dark));
  border-radius: var(--radius-lg);
  padding: 48px;
  text-align: center;
  color: #fff;
}
.cta-box h2 { font-size: 1.8rem; margin-bottom: 12px; }
.cta-box p { opacity: 0.9; margin-bottom: 24px; }
.cta-box .btn { background: #fff; color: var(--primary); }
.cta-box .btn:hover { background: var(--bg-secondary); }

/* Footer */
footer {
  background: var(--bg-secondary);
  border-top: 1px solid var(--border);
  padding: 40px 24px;
  text-align: center;
}
.footer-container { max-width: var(--max-width); margin: 0 auto; }
.footer-security {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  margin-bottom: 16px;
  color: var(--text-secondary);
  font-size: 0.9rem;
}
.footer-security svg { width: 18px; height: 18px; color: var(--accent); }
.footer-copy { color: var(--text-secondary); font-size: 0.85rem; }

/* Utilities */
.text-center { text-align: center; }
.mb-1 { margin-bottom: 8px; }
.mb-2 { margin-bottom: 16px; }
.mb-3 { margin-bottom: 24px; }
.mt-2 { margin-top: 16px; }
.mt-3 { margin-top: 24px; }

/* Spin */
@keyframes spin { to { transform: rotate(360deg); } }

/* Responsive */
@media (max-width: 768px) {
  .hero h1 { font-size: 2rem; }
  .hero .subtitle { font-size: 1rem; }
  .deep-feature { grid-template-columns: 1fr; }
  .deep-feature:nth-child(even) { direction: ltr; }
  .nav-links { gap: 2px; }
  .nav-links a { padding: 6px 12px; font-size: 0.85rem; }
  .comparison-table { font-size: 0.85rem; }
  .comparison-table th, .comparison-table td { padding: 10px 8px; }
  .download-meta { flex-direction: column; gap: 8px; }
  .hero-badges { flex-direction: column; gap: 8px; }
}