:root {
  --primary: #f58c38; 
  --primary-hover: #e66f2a;
  --secondary: #35211a; 
  --bg-color: #fffdf9; 
  --surface: #ffffff;
  --text-main: #4a332a; 
  --text-muted: #816456; 
  --border-color: #e8ddd2; 
  
  --radius-sm: 8px;
  --radius-md: 16px;
  --radius-lg: 24px;
  --radius-full: 9999px;
  
  --shadow-sm: 0 1px 2px 0 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);
  
  --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

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

a { text-decoration: none; color: inherit; }
img { max-width: 100%; height: auto; display: block; }

/* Layout Structure */
.site-shell { display: flex; flex-direction: column; min-height: 100vh; }
#main { flex-grow: 1; }
.container { width: 100%; max-width: 1200px; margin: 0 auto; padding: 0 24px; }

/* Header */
.site-header {
  background: rgba(255, 255, 255, 0.85);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  position: sticky;
  top: 0;
  z-index: 100;
  border-bottom: 1px solid rgba(226, 232, 240, 0.6);
}
.header-inner { display: flex; justify-content: space-between; align-items: center; height: 72px; }
.brand { display: flex; align-items: center; gap: 12px; transition: var(--transition); }
.brand:hover { transform: scale(1.02); }
.brand img { width: 44px; height: 44px; border-radius: 12px; box-shadow: var(--shadow-sm); }
.brand-text { display: flex; flex-direction: column; justify-content: center; }
.brand-text strong { font-size: 1.25rem; font-weight: 800; color: var(--secondary); line-height: 1.1; letter-spacing: -0.02em; }
.brand-text span { font-size: 0.75rem; color: var(--text-muted); font-weight: 500; margin-top: 2px; }

.nav { display: flex; gap: 32px; align-items: center; }
.nav a { font-size: 0.95rem; font-weight: 600; color: var(--text-muted); transition: var(--transition); position: relative; }
.nav a:hover { color: var(--primary); }
.nav a.active { color: var(--primary); }
.nav a.active::after {
  content: ''; position: absolute; bottom: -24px; left: 0; right: 0; height: 3px; background: var(--primary); border-radius: 3px 3px 0 0;
}

.mobile-nav {
  display: none;
  align-items: center;
  gap: 12px;
}
.mobile-menu-toggle {
  display: inline-flex;
  flex-direction: column;
  justify-content: space-between;
  width: 34px;
  height: 28px;
  background: transparent;
  border: none;
  padding: 0;
  cursor: pointer;
}
.mobile-menu-toggle span {
  display: block;
  height: 3px;
  border-radius: 999px;
  background: var(--secondary);
  transition: transform 0.3s ease, opacity 0.3s ease;
}
.mobile-download {
  display: inline-flex;
  padding: 6px 14px;
  font-size: 0.85rem;
}

/* Buttons */
.download-button {
  display: inline-flex; align-items: center; justify-content: center; gap: 8px;
  background: var(--primary); color: #fff; padding: 14px 32px; border-radius: var(--radius-full);
  font-weight: 600; font-size: 1.05rem; box-shadow: var(--shadow-md); transition: var(--transition); border: 2px solid transparent;
}
.download-button:hover { background: var(--primary-hover); transform: translateY(-2px); box-shadow: var(--shadow-lg); color: #fff; }
.button-secondary {
  display: inline-flex; align-items: center; justify-content: center; background: #fff; color: var(--secondary);
  padding: 14px 32px; border-radius: var(--radius-full); font-weight: 600; font-size: 1.05rem; border: 1px solid var(--border-color); transition: var(--transition);
}
.button-secondary:hover { background: var(--bg-color); border-color: #cbd5e1; transform: translateY(-2px); }

/* Hero Section */
.hero {
  padding: 100px 0 120px;
  background: radial-gradient(circle at 80% -20%, #ffedd5 0%, #ffffff 50%, var(--bg-color) 100%);
  overflow: hidden;
}
.hero-grid { display: grid; grid-template-columns: 1fr; gap: 60px; align-items: center; }
.hero-panel { display: flex; flex-direction: column; gap: 24px; }
.hero-top {
  display: flex;
  align-items: center;
  gap: 32px;
  flex-wrap: wrap;
}
.hero-copy {
  flex: 1;
  min-width: 280px;
}
.eyebrow {
  display: inline-flex; gap: 12px; background: #fff3e0; color: var(--primary); padding: 8px 20px; border-radius: var(--radius-full);
  font-size: 0.875rem; font-weight: 700; width: fit-content; border: 1px solid #fed7aa;
  margin-bottom: 18px;
}
.hero h1 { font-size: 4rem; font-weight: 800; color: var(--secondary); line-height: 1.1; letter-spacing: -0.03em; }
.hero h1 span {
  display: block; font-size: 2.25rem; font-weight: 700; margin-top: 12px;
  background: linear-gradient(135deg, var(--primary) 0%, #facc15 100%);
  -webkit-background-clip: text; -webkit-text-fill-color: transparent;
}
.hero p { font-size: 1.2rem; color: var(--text-muted); line-height: 1.7; max-width: 90%; }
.hero-actions { display: flex; flex-wrap: wrap; gap: 16px; margin-top: 16px; }
.hero-actions svg path { stroke: currentColor !important; }
.hero-metrics { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; margin-top: 32px; padding-top: 32px; border-top: 1px solid var(--border-color); }
.mini-card { display: flex; flex-direction: column; gap: 6px; }
.metric-value { font-size: 1.75rem; font-weight: 800; color: var(--secondary); }
.mini-card span:last-child { font-size: 0.9rem; color: var(--text-muted); }

.hero-figure {
  position: relative;
  z-index: 1;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: min(340px, 100%);
  aspect-ratio: 1 / 1;
  margin: 0 auto;
  padding: 0;
  border-radius: 32px;
  overflow: hidden;
  transition: var(--transition);
  box-shadow: 0 20px 45px rgba(0, 0, 0, 0.08);
}
.hero-figure:hover { transform: translateY(-8px); }
.hero-figure img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  border-radius: 32px;
  display: block;
}
.hero-note {
  display: none;
}

/* Global Page Sections */
.page-section { padding: 100px 0; }
.page-highlights { background: #fff; }
.section-heading { display: grid; gap: 18px; text-align: center; max-width: 700px; margin: 0 auto 60px; }
.section-heading h2 { font-size: 2.5rem; font-weight: 800; color: var(--secondary); margin-bottom: 20px; letter-spacing: -0.02em; }
.section-heading > a { justify-self: center; margin-top: 10px; }
.section-lead { font-size: 1.2rem; color: var(--text-muted); line-height: 1.6; }

/* Features & Grids */
.feature-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(260px, 1fr)); gap: 32px; }
.feature-card { background: var(--bg-color); padding: 40px 32px; border-radius: var(--radius-lg); border: 1px solid var(--border-color); transition: var(--transition); }
.feature-card:hover { transform: translateY(-8px); box-shadow: var(--shadow-lg); background: #fff; border-color: #cbd5e1; }
.feature-card h3 { font-size: 1.35rem; font-weight: 800; color: var(--secondary); margin-bottom: 16px; }
.feature-card p { font-size: 1rem; color: var(--text-muted); line-height: 1.6; }
.feature-card-main { background: linear-gradient(135deg, var(--primary) 0%, #c2410c 100%); color: #fff; border: none; }
.feature-card-main h3 { color: #fff; }
.feature-card-main p { color: rgba(255,255,255,0.8); }
.feature-card-badge { display: flex; gap: 10px; margin-top: 24px; }
.feature-card-badge span { background: rgba(255,255,255,0.2); padding: 6px 16px; border-radius: var(--radius-full); font-size: 0.8rem; font-weight: 700; }
.feature-list { display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); gap: 0; margin: 0 auto; }
.feature-line { padding: 0 30px; border-left: 1px solid var(--border-color); }
.feature-line:first-child { padding-left: 0; border-left: none; }
.feature-line h3 { font-size: 1.35rem; font-weight: 800; color: var(--secondary); margin-bottom: 12px; }
.feature-line p { font-size: 1rem; color: var(--text-muted); line-height: 1.8; }
@media (max-width: 900px) {
  .feature-list { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .feature-line { padding: 24px 20px; border-left: none; border-top: 1px solid var(--border-color); }
  .feature-line:first-child { border-top: none; padding-left: 20px; }
}
@media (max-width: 560px) {
  .feature-list { grid-template-columns: 1fr; }
}

.detail-grid { display: grid; grid-template-columns: minmax(300px, 1.3fr) minmax(260px, 0.7fr); gap: 28px; align-items: start; }
.detail-lead { background: var(--bg-color); padding: 38px 36px; border-radius: var(--radius-lg); border: 1px solid var(--border-color); }
.detail-lead h3 { font-size: clamp(2rem, 2.8vw, 2.4rem); margin-bottom: 18px; color: var(--secondary); }
.detail-lead p { font-size: 1rem; color: var(--text-muted); line-height: 1.8; }
.detail-points { display: grid; gap: 16px; margin-top: 28px; }
.detail-points div { display: grid; gap: 10px; }
.detail-points strong { font-size: 1rem; color: var(--text); display: block; }
.detail-points p { margin: 0; color: var(--text-muted); line-height: 1.7; }
.detail-side { display: grid; gap: 20px; }
.small-card { background: #fff; padding: 24px; border-radius: var(--radius-lg); border: 1px solid var(--border-color); }
.small-card h3 { font-size: 1.15rem; margin-bottom: 12px; color: var(--secondary); }
.small-card p { margin: 0; color: var(--text-muted); line-height: 1.7; }
@media (max-width: 980px) {
  .detail-grid { grid-template-columns: 1fr; }
}
/* Cards and Panels */
.intro-shell { background: #fff; border-radius: var(--radius-lg); padding: 80px; box-shadow: var(--shadow-xl); border: 1px solid var(--border-color); }
.intro-head { max-width: 700px; margin-bottom: 50px; }
.intro-head h2 { font-size: 2.25rem; font-weight: 800; color: var(--secondary); margin-bottom: 20px; }
.intro-head p { font-size: 1.2rem; color: var(--text-muted); line-height: 1.6; }
.intro-wide-card {
  display: flex; justify-content: space-between; align-items: center; background: var(--bg-color);
  padding: 40px; border-radius: var(--radius-md); margin-top: 50px; border: 1px solid var(--border-color);
}
.intro-wide-main h3 { font-size: 1.35rem; font-weight: 800; color: var(--secondary); margin-bottom: 12px; }
.intro-wide-main p { color: var(--text-muted); max-width: 400px; font-size: 1.05rem; }
.intro-points { display: flex; flex-wrap: wrap; gap: 16px; }
.intro-points span { background: #fff; padding: 10px 20px; border-radius: var(--radius-full); font-size: 0.95rem; font-weight: 700; color: var(--primary); box-shadow: var(--shadow-sm); border: 1px solid var(--border-color); }

.timeline-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 40px; }
.timeline-item { background: #fff; padding: 48px 32px; border-radius: var(--radius-lg); box-shadow: var(--shadow-sm); border: 1px solid var(--border-color); transition: var(--transition); }
.timeline-item:hover { transform: translateY(-8px); box-shadow: var(--shadow-lg); border-color: var(--primary); }
.timeline-year { display: inline-block; font-size: 0.9rem; font-weight: 800; color: var(--primary); background: #fff3e0; padding: 8px 20px; border-radius: var(--radius-full); margin-bottom: 24px; border: 1px solid #fed7aa; }
.timeline-item h3 { font-size: 1.5rem; font-weight: 800; color: var(--secondary); margin-bottom: 16px; }
.timeline-item p { color: var(--text-muted); font-size: 1.05rem; line-height: 1.6; }

.version-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(320px, 1fr)); gap: 32px; }
.version-card { background: #fff; padding: 40px; border-radius: var(--radius-lg); border: 1px solid var(--border-color); transition: var(--transition); display: flex; flex-direction: column; }
.version-card:hover { border-color: var(--primary); box-shadow: var(--shadow-lg); transform: translateY(-4px); }
.version-card h3 { font-size: 2rem; font-weight: 800; color: var(--secondary); margin-bottom: 20px; }
.version-card p { color: var(--text-muted); flex-grow: 1; margin-bottom: 32px; font-size: 1.1rem; }
.version-meta { display: flex; gap: 12px; }
.version-meta span { background: var(--bg-color); color: var(--text-main); padding: 6px 16px; border-radius: var(--radius-full); font-size: 0.85rem; font-weight: 700; border: 1px solid var(--border-color); }
.version-card:first-child { background: linear-gradient(135deg, var(--primary) 0%, #c2410c 100%); color: #fff; border: none; transform: scale(1.02); box-shadow: var(--shadow-xl); }
.version-card:first-child h3, .version-card:first-child p { color: #fff; }
.version-card:first-child .version-meta span { background: rgba(255,255,255,0.2); color: #fff; border-color: transparent; }
.version-card:first-child:hover { transform: scale(1.02) translateY(-4px); }

/* Download Area */
.download-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 60px; }
.download-card { background: #fff; padding: 50px; border-radius: var(--radius-lg); box-shadow: var(--shadow-sm); border: 1px solid var(--border-color); }
.download-card h2 { font-size: 2.25rem; font-weight: 800; color: var(--secondary); margin-bottom: 24px; }
.download-card > p { color: var(--text-muted); margin-bottom: 40px; font-size: 1.15rem; }
.download-points { display: flex; flex-direction: column; gap: 32px; margin-bottom: 40px; }
.download-point { display: flex; gap: 20px; align-items: flex-start; }
.point-icon { flex-shrink: 0; width: 56px; height: 56px; background: #fff3e0; border-radius: 16px; display: flex; align-items: center; justify-content: center; }
.point-icon svg { width: 28px; height: 28px; stroke: var(--primary); }
.point-icon svg path { stroke: var(--primary) !important; }
.download-point strong { display: block; font-size: 1.25rem; color: var(--secondary); margin-bottom: 6px; font-weight: 700; }
.list-note { color: var(--text-muted); font-size: 1.05rem; }

/* Table */
.table-wrap { overflow-x: auto; background: #fff; border-radius: var(--radius-lg); border: 1px solid var(--border-color); box-shadow: var(--shadow-sm); }
table { width: 100%; border-collapse: collapse; text-align: left; }
th { background: var(--bg-color); padding: 20px 32px; font-weight: 700; color: var(--secondary); border-bottom: 2px solid var(--border-color); font-size: 0.9rem; text-transform: uppercase; letter-spacing: 0.05em; }
td { padding: 24px 32px; border-bottom: 1px solid var(--border-color); color: var(--text-muted); font-size: 1.05rem; }
tr:last-child td { border-bottom: none; }
tbody tr { transition: var(--transition); }
tbody tr:hover { background: #fff7ed; }

/* CTA Board */
.cta-section { padding: 120px 0; }
.cta-panel { background: linear-gradient(135deg, var(--secondary) 0%, #431407 100%); border-radius: 40px; padding: 100px 40px; text-align: center; color: #fff; box-shadow: var(--shadow-xl); }
.cta-panel h2 { font-size: 3.5rem; font-weight: 800; margin-bottom: 24px; letter-spacing: -0.02em; }
.cta-panel p { font-size: 1.25rem; color: #94a3b8; max-width: 600px; margin: 0 auto 40px; line-height: 1.7; }
.review-grid { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 32px; max-width: 1080px; margin: 0 auto 40px; text-align: left; }
.review-item { padding: 28px 0; border-bottom: 1px solid var(--border-color); }
.review-item:last-child { border-bottom: none; }
.review-item p { margin: 0 0 18px; font-size: 1rem; line-height: 1.9; color: var(--text); }
.review-item footer { display: flex; gap: 10px; align-items: center; font-size: 0.95rem; color: var(--text-muted); }
.review-item footer strong { color: var(--text); }
.cta-panel .hero-actions { justify-content: center; }

/* Subpages (About, Versions) Layout */
.page-hero { padding: 120px 0 80px; text-align: center; background: linear-gradient(135deg, #fff7ed 0%, #ffffff 100%); border-bottom: 1px solid var(--border-color); }
.content-panel { max-width: 800px; margin: 0 auto; }
.page-hero h1 { font-size: 3.5rem; font-weight: 800; color: var(--secondary); margin: 24px 0; line-height: 1.2; letter-spacing: -0.02em; }
.page-hero h1 span { display: block; font-size: 2rem; font-weight: 700; color: var(--primary); margin-top: 12px; }
.page-hero p { font-size: 1.25rem; color: var(--text-muted); line-height: 1.8; max-width: 800px; margin: 0 auto; }

.two-col { display: grid; grid-template-columns: 1fr 1fr; gap: 80px; }
.content-panel h2 { font-size: 2.25rem; font-weight: 800; color: var(--secondary); margin-bottom: 32px; }
.content-panel h3 { font-size: 1.75rem; font-weight: 800; color: var(--secondary); margin-bottom: 20px; }
.content-panel p { color: var(--text-muted); margin-bottom: 24px; font-size: 1.15rem; line-height: 1.8; }
.cards-3 { display: grid; grid-template-columns: repeat(3, 1fr); gap: 40px; }
.cards-3 .content-panel { background: #fff; padding: 48px; border-radius: var(--radius-lg); box-shadow: var(--shadow-sm); border: 1px solid var(--border-color); transition: var(--transition); }
.cards-3 .content-panel:hover { transform: translateY(-8px); box-shadow: var(--shadow-lg); border-color: var(--primary); }
.chip-row { display: flex; flex-wrap: wrap; gap: 16px; margin-top: 32px; justify-content: center; }
.chip { background: var(--bg-color); color: var(--secondary); padding: 10px 20px; border-radius: var(--radius-full); font-size: 0.95rem; font-weight: 700; border: 1px solid var(--border-color); }
.inline-actions { margin-top: 32px; }

/* Footer */
.site-footer { background: #292524; color: #a8a29e; padding: 100px 0 40px; border-top: 1px solid #44403c; }
.footer-grid { display: grid; grid-template-columns: 2fr 1fr; gap: 80px; margin-bottom: 80px; padding-bottom: 80px; border-bottom: 1px solid #44403c; }
.footer-title { color: #fafaf9; font-size: 1.5rem; font-weight: 800; margin-bottom: 24px; }
.footer-meta { line-height: 1.8; max-width: 400px; font-size: 1.05rem; }
.footer-links { display: flex; flex-direction: column; gap: 16px; font-size: 1.05rem; }
.footer-links a { transition: var(--transition); color: #a8a29e; }
.footer-links a:hover { color: #fff; padding-left: 4px; }
.footer-bottom { display: flex; justify-content: space-between; align-items: center; font-size: 0.95rem; flex-wrap: wrap; gap: 24px; }
.footer-bottom a { color: #fb923c; transition: var(--transition); }
.footer-bottom a:hover { color: #fdba74; text-decoration: underline; }

/* Reveal Animation Optimization */
.reveal { animation: fadeUp 0.8s cubic-bezier(0.16, 1, 0.3, 1) forwards; opacity: 0; }
@keyframes fadeUp {
  0% { opacity: 0; transform: translateY(30px); }
  100% { opacity: 1; transform: translateY(0); }
}
.hero-panel.reveal { animation-delay: 0.1s; }
.hero-visual.reveal { animation-delay: 0.2s; }

/* Global Responsive Adaptations */
@media (max-width: 1200px) {
  .container { max-width: 1100px; }
  .hero-figure { width: min(420px, 100%); }
  .page-hero h1 { font-size: 3.25rem; }
}
@media (max-width: 1024px) {
  .header-inner { flex-wrap: wrap; gap: 20px; }
  .nav { justify-content: center; gap: 18px; }
  .hero h1 { font-size: 3.5rem; }
  .hero-grid, .two-col, .download-grid, .footer-grid { grid-template-columns: 1fr; gap: 60px; }
  .hero-visual { order: -1; }
  .timeline-grid, .cards-3 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .review-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .intro-shell { padding: 40px; }
  .intro-wide-card { flex-direction: column; align-items: flex-start; gap: 24px; }
}
@media (max-width: 768px) {
  .header-inner { justify-content: space-between; position: relative; }
  .nav {
    position: absolute;
    top: 72px;
    left: 0;
    right: 0;
    display: none;
    flex-direction: column;
    gap: 12px;
    padding: 18px 24px 24px;
    background: rgba(255, 255, 255, 0.98);
    border-bottom: 1px solid rgba(226, 232, 240, 0.6);
    box-shadow: 0 16px 30px rgba(0, 0, 0, 0.08);
  }
  .site-header.nav-open .nav {
    display: flex;
  }
  .nav a { width: 100%; padding: 12px 0; }
  .nav a.active::after { display: none; }
  .mobile-nav { display: flex; }
  .mobile-download { width: auto; min-width: 0; padding: 6px 12px; }
  .hero h1 { font-size: 2.75rem; }
  .hero h1 span { font-size: 1.75rem; }
  .hero-metrics {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 12px;
    margin-top: 24px;
    padding-top: 24px;
    border-top: 1px solid var(--border-color);
  }
  .hero-metrics .mini-card {
    padding: 8px 0;
    align-items: center;
    text-align: center;
  }
  .hero-metrics .metric-value { font-size: 1.15rem; }
  .hero-metrics .mini-card span:last-child {
    font-size: 0.82rem;
    text-align: center;
  }
  .hero-actions { flex-direction: column; width: 100%; }
  .download-button, .button-secondary { width: 100%; justify-content: center; }
  .mobile-nav .download-button.mobile-download { width: auto; }
  .hero { padding: 50px 0 90px; }
  .feature-list { display: grid; grid-template-columns: 1fr; gap: 0; margin-left: 0; margin-right: 0; padding-left: 0; padding-bottom: 0; overflow-x: visible; }
  .feature-line { padding: 24px 20px; border-left: none; border-top: 1px solid var(--border-color); }
  .feature-line:first-child { border-top: none; padding-left: 20px; }
  .feature-line h3 { font-size: 1.15rem; }
  .feature-line p { font-size: 0.95rem; }
  .timeline-grid, .cards-3 { grid-template-columns: 1fr; gap: 24px; }
  .timeline-year { font-size: 0.82rem; padding: 6px 14px; }
  .timeline-item h3 { font-size: 1.35rem; }
  .timeline-item p { font-size: 0.95rem; }
  .cta-panel { padding: 60px 24px; border-radius: 24px; }
  .cta-panel h2 { font-size: 2.25rem; }
  .footer-bottom { flex-direction: column; align-items: flex-start; }
  .page-hero h1 { font-size: 2.5rem; }
  .download-card { padding: 32px; }
  .review-grid { grid-template-columns: 1fr; }
  .cards-3 .content-panel { padding: 32px; }

  /* Version History Table Mobile Transformation */
  .version-history-table { border: none; box-shadow: none; background: transparent; }
  .version-history-table table, 
  .version-history-table thead, 
  .version-history-table tbody, 
  .version-history-table th, 
  .version-history-table td, 
  .version-history-table tr { display: block; width: 100%; box-sizing: border-box; }
  .version-history-table thead { display: none; }
  .version-history-table tr { 
    background: #fff; 
    border: 1px solid var(--border-color); 
    border-radius: var(--radius-lg); 
    padding: 30px 24px; 
    margin-bottom: 24px; 
    box-shadow: var(--shadow-sm); 
    position: relative;
    transition: var(--transition);
  }
  .version-history-table tr:hover { transform: translateY(-4px); box-shadow: var(--shadow-md); border-color: var(--primary); }
  .version-history-table td { border: none; padding: 0; text-align: left; }
  .version-history-table td:nth-child(1) { font-size: 1.75rem; font-weight: 800; color: var(--secondary); margin-bottom: 12px; }
  .version-history-table td:nth-child(4) { 
    display: inline-flex; background: #fff3e0; color: var(--primary); 
    padding: 6px 14px; border-radius: 99px; font-size: 0.85rem; font-weight: 700; 
    margin-bottom: 20px; border: 1px solid #fed7aa; 
  }
  .version-history-table td:nth-child(2) { font-size: 1.05rem; line-height: 1.7; color: var(--text-muted); margin-bottom: 24px; }
  .version-history-table td:nth-child(3) { font-size: 0.9rem; color: var(--text-muted); margin-bottom: 20px; display: flex; align-items: center; gap: 8px; }
  .version-history-table td:nth-child(3)::before { content: "适用平台"; font-weight: 700; color: var(--secondary); }
  .version-history-table td:nth-child(5) { padding-top: 20px; border-top: 1px solid var(--border-color); }
  .version-history-table td:nth-child(5) .download-button { width: 100%; padding: 12px; font-size: 1rem; }
  .version-history-table tr:first-of-type { background: linear-gradient(135deg, #fff 0%, #fff7ed 100%); border-color: #fed7aa; }
  .version-history-table tr:first-of-type td:nth-child(1) { color: var(--primary); }
}
@media (min-width: 1600px) {
  .container { max-width: 1440px; padding: 0 32px; }
  .hero h1 { font-size: 4.5rem; }
  .hero h1 span { font-size: 2.75rem; }
  .page-hero h1 { font-size: 4rem; }
  .page-hero h1 span { font-size: 2.5rem; }
  .section-heading { max-width: 840px; }
}

/* SEO Content Hub */
.seo-content-hub { background: #fffcf8; border-top: 1px solid var(--border-color); padding: 80px 0; }
.seo-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(400px, 1fr)); gap: 40px; }
.seo-article { border-bottom: 1px solid var(--border-color); padding-bottom: 32px; }
.seo-article h3 { font-size: 1.25rem; color: var(--secondary); margin-bottom: 16px; font-weight: 700; }
.seo-article p { font-size: 1rem; color: var(--text-muted); line-height: 1.8; margin-bottom: 0; }
@media (max-width: 768px) {
  .seo-grid { grid-template-columns: 1fr; gap: 32px; }
  .seo-article h3 { font-size: 1.15rem; }
}

/* Accordion (FAQ) */
.accordion { display: flex; flex-direction: column; gap: 12px; }
.accordion details { 
  border: 1px solid var(--border-color); 
  border-radius: var(--radius-md); 
  background: #fff; 
  overflow: hidden; 
  transition: var(--transition);
}
.accordion details[open] { border-color: var(--primary); box-shadow: var(--shadow-sm); }
.accordion summary { 
  padding: 16px 24px; 
  cursor: pointer; 
  font-weight: 700; 
  color: var(--secondary); 
  list-style: none; 
  display: flex; 
  justify-content: space-between; 
  align-items: center; 
}
.accordion summary::-webkit-details-marker { display: none; }
.accordion summary::after { 
  content: '+'; 
  font-size: 1.25rem; 
  color: var(--primary); 
  transition: transform 0.3s ease; 
}
.accordion details[open] summary::after { transform: rotate(45deg); }
.accordion details p { padding: 0 24px 20px; color: var(--text-muted); line-height: 1.6; }

/* Point Items */
.detail-points { margin-top: 32px; display: grid; gap: 24px; }
.point-item { display: flex; flex-direction: column; gap: 4px; padding-left: 20px; border-left: 2px solid var(--primary); }
.point-item strong { color: var(--secondary); font-size: 1.1rem; }
.point-item p { font-size: 0.95rem; margin: 0; }

/* Floating Download Button */
.floating-download-btn {
  position: fixed;
  bottom: 32px;
  right: 32px;
  z-index: 999;
  display: flex;
  align-items: center;
  gap: 10px;
  background: linear-gradient(135deg, var(--primary) 0%, #ff6b00 100%);
  color: #fff;
  padding: 14px 26px;
  border-radius: var(--radius-full);
  font-weight: 800;
  font-size: 1rem;
  box-shadow: 0 12px 30px rgba(245, 140, 56, 0.4);
  transition: all 0.4s cubic-bezier(0.175, 0.885, 0.32, 1.275);
  text-decoration: none;
  border: 2px solid rgba(255, 255, 255, 0.2);
}
.floating-download-btn:hover {
  transform: translateY(-6px) scale(1.05);
  box-shadow: 0 20px 40px rgba(245, 140, 56, 0.5);
  color: #fff;
}
.floating-download-btn svg { width: 22px; height: 22px; }
@media (max-width: 768px) {
  .floating-download-btn {
    bottom: 24px;
    right: 20px;
    padding: 12px 20px;
    font-size: 0.9rem;
    box-shadow: 0 8px 20px rgba(0, 0, 0, 0.2);
  }
}