/* ============================================
   apps-google-chrome-4.hl.cn — Editorial Theme
   Navy + Coral + Ink style
   ============================================ */

:root {
  --navy: #0f1f3d;
  --navy-mid: #1a3260;
  --navy-light: #2a4a8a;
  --coral: #e8472a;
  --coral-light: #ff6347;
  --amber: #f5a623;
  --ink: #1a1a2e;
  --slate: #4a5568;
  --mist: #f0f4f8;
  --white: #ffffff;
  --border: #e2e8f0;
  --shadow-sm: 0 2px 8px rgba(15,31,61,0.08);
  --shadow-md: 0 8px 32px rgba(15,31,61,0.12);
  --shadow-lg: 0 20px 60px rgba(15,31,61,0.16);
  --radius: 10px;
  --radius-lg: 18px;
  --font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Microsoft YaHei", sans-serif;
  --font-serif: Georgia, "Times New Roman", "STSong", serif;
}

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

html { font-size: 16px; scroll-behavior: smooth; }

body {
  font-family: var(--font-sans);
  color: var(--ink);
  background: var(--white);
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
}

a { color: inherit; text-decoration: none; }
img { max-width: 100%; display: block; }
button { cursor: pointer; font-family: inherit; border: none; outline: none; }
ul, ol { list-style: none; }

/* ---- Layout ---- */
.container { max-width: 1160px; margin: 0 auto; padding: 0 24px; }
.section { padding: 80px 0; }
.section-sm { padding: 56px 0; }

/* ---- Top Banner ---- */
.top-banner {
  background: var(--navy);
  color: rgba(255,255,255,0.85);
  text-align: center;
  font-size: 0.8rem;
  padding: 8px 24px;
  letter-spacing: 0.03em;
}
.top-banner strong { color: var(--amber); }

/* ---- Header / Nav ---- */
.site-header {
  background: var(--white);
  border-bottom: 3px solid var(--navy);
  position: sticky;
  top: 0;
  z-index: 100;
  box-shadow: var(--shadow-sm);
}
.nav-shell {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 64px;
  gap: 24px;
}
.brand {
  display: flex;
  align-items: center;
  gap: 10px;
  font-weight: 800;
  font-size: 1.05rem;
  color: var(--navy);
  letter-spacing: -0.01em;
  flex-shrink: 0;
}
.brand svg { width: 36px; height: 36px; }
.brand-sub {
  font-size: 0.7rem;
  font-weight: 400;
  color: var(--slate);
  display: block;
  line-height: 1;
  margin-top: 2px;
}
.nav-links {
  display: flex;
  align-items: center;
  gap: 4px;
}
.nav-link {
  font-size: 0.9rem;
  font-weight: 600;
  color: var(--slate);
  padding: 6px 14px;
  border-radius: 6px;
  transition: color 0.2s, background 0.2s;
  white-space: nowrap;
}
.nav-link:hover { color: var(--navy); background: var(--mist); }
.nav-link.active {
  color: var(--white);
  background: var(--navy);
}
.nav-dl-btn {
  background: var(--coral);
  color: var(--white);
  padding: 8px 18px;
  border-radius: 6px;
  font-size: 0.85rem;
  font-weight: 700;
  transition: background 0.2s, transform 0.15s;
  flex-shrink: 0;
}
.nav-dl-btn:hover { background: var(--coral-light); transform: translateY(-1px); }

/* ---- Buttons ---- */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 13px 26px;
  border-radius: 8px;
  font-size: 0.95rem;
  font-weight: 700;
  transition: all 0.2s;
  border: none;
  cursor: pointer;
}
.btn svg { width: 18px; height: 18px; flex-shrink: 0; }
.btn:disabled { opacity: 0.7; cursor: not-allowed; }
.btn-primary {
  background: var(--coral);
  color: var(--white);
  box-shadow: 0 4px 16px rgba(232,71,42,0.3);
}
.btn-primary:hover { background: var(--coral-light); transform: translateY(-2px); box-shadow: 0 8px 24px rgba(232,71,42,0.4); }
.btn-navy {
  background: var(--navy);
  color: var(--white);
  box-shadow: 0 4px 16px rgba(15,31,61,0.25);
}
.btn-navy:hover { background: var(--navy-mid); transform: translateY(-2px); }
.btn-outline {
  background: transparent;
  color: var(--navy);
  border: 2px solid var(--navy);
}
.btn-outline:hover { background: var(--navy); color: var(--white); }
.btn-ghost {
  background: rgba(255,255,255,0.12);
  color: var(--white);
  border: 1px solid rgba(255,255,255,0.25);
}
.btn-ghost:hover { background: rgba(255,255,255,0.22); }

/* ---- Hero Editorial ---- */
.hero-editorial {
  background: var(--navy);
  color: var(--white);
  padding: 0;
  overflow: hidden;
  position: relative;
}
.hero-editorial::before {
  content: '';
  position: absolute;
  inset: 0;
  background:
    radial-gradient(ellipse 60% 80% at 80% 50%, rgba(42,74,138,0.7) 0%, transparent 70%),
    repeating-linear-gradient(0deg, transparent, transparent 39px, rgba(255,255,255,0.03) 40px),
    repeating-linear-gradient(90deg, transparent, transparent 39px, rgba(255,255,255,0.03) 40px);
  pointer-events: none;
}
.hero-inner {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0;
  min-height: 580px;
  position: relative;
  z-index: 1;
}
.hero-left {
  padding: 72px 56px 72px 0;
  display: flex;
  flex-direction: column;
  justify-content: center;
}
.hero-kicker {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: rgba(232,71,42,0.15);
  border: 1px solid rgba(232,71,42,0.4);
  color: var(--coral-light);
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  padding: 5px 12px;
  border-radius: 4px;
  margin-bottom: 20px;
}
.hero-kicker svg { width: 14px; height: 14px; }
.hero-h1 {
  font-size: clamp(2.2rem, 4vw, 3.4rem);
  font-weight: 900;
  line-height: 1.1;
  letter-spacing: -0.02em;
  margin-bottom: 20px;
}
.hero-h1 em {
  font-style: normal;
  color: var(--coral-light);
}
.hero-lead {
  font-size: 1.05rem;
  color: rgba(255,255,255,0.78);
  line-height: 1.75;
  margin-bottom: 32px;
  max-width: 480px;
}
.hero-actions { display: flex; gap: 14px; flex-wrap: wrap; margin-bottom: 36px; }
.hero-stats {
  display: flex;
  gap: 32px;
  padding-top: 28px;
  border-top: 1px solid rgba(255,255,255,0.12);
}
.hero-stat-num {
  font-size: 1.9rem;
  font-weight: 900;
  color: var(--amber);
  line-height: 1;
}
.hero-stat-label {
  font-size: 0.78rem;
  color: rgba(255,255,255,0.55);
  margin-top: 4px;
}
.hero-right {
  background: var(--navy-mid);
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 40px;
  position: relative;
  overflow: hidden;
}
.hero-right::before {
  content: '';
  position: absolute;
  width: 400px; height: 400px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(42,74,138,0.6) 0%, transparent 70%);
  top: -100px; right: -100px;
}
.browser-mockup {
  width: 100%;
  max-width: 440px;
  background: #1e2d50;
  border-radius: 14px;
  overflow: hidden;
  box-shadow: 0 30px 80px rgba(0,0,0,0.5);
  position: relative;
  z-index: 1;
}
.bm-bar {
  background: #0d1729;
  padding: 12px 16px;
  display: flex;
  align-items: center;
  gap: 10px;
}
.bm-dots { display: flex; gap: 6px; }
.bm-dot { width: 10px; height: 10px; border-radius: 50%; }
.bm-dot-r { background: #ff5f57; }
.bm-dot-y { background: #ffbd2e; }
.bm-dot-g { background: #28ca41; }
.bm-url {
  flex: 1;
  background: #1a2a47;
  border-radius: 6px;
  padding: 6px 12px;
  font-size: 0.75rem;
  color: rgba(255,255,255,0.5);
  display: flex;
  align-items: center;
  gap: 6px;
}
.bm-url svg { width: 12px; height: 12px; color: #34a853; flex-shrink: 0; }
.bm-content { padding: 24px; }
.bm-tabs {
  display: flex;
  gap: 6px;
  margin-bottom: 20px;
}
.bm-tab {
  padding: 6px 14px;
  border-radius: 6px;
  font-size: 0.78rem;
  font-weight: 600;
  background: rgba(255,255,255,0.06);
  color: rgba(255,255,255,0.5);
}
.bm-tab.active { background: var(--coral); color: white; }
.bm-feature-list { display: flex; flex-direction: column; gap: 12px; }
.bm-feature-row {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 10px 14px;
  background: rgba(255,255,255,0.05);
  border-radius: 8px;
  font-size: 0.82rem;
  color: rgba(255,255,255,0.75);
}
.bm-feature-icon {
  width: 30px; height: 30px;
  border-radius: 8px;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}
.bm-feature-icon svg { width: 16px; height: 16px; }
.bm-fi-red { background: rgba(232,71,42,0.2); color: var(--coral-light); }
.bm-fi-green { background: rgba(52,168,83,0.2); color: #34a853; }
.bm-fi-blue { background: rgba(66,133,244,0.2); color: #4285f4; }
.bm-fi-amber { background: rgba(245,166,35,0.2); color: var(--amber); }
.bm-feature-text { line-height: 1.4; }
.bm-feature-text strong { display: block; font-size: 0.85rem; color: white; }

/* ---- Trust Strip ---- */
.trust-strip {
  background: var(--mist);
  border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
  padding: 20px 0;
}
.trust-inner {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 40px;
  flex-wrap: wrap;
}
.trust-item {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--slate);
}
.trust-item svg { width: 18px; height: 18px; color: var(--coral); flex-shrink: 0; }

/* ---- Section Headers ---- */
.section-label {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 0.7rem;
  font-weight: 800;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--coral);
  margin-bottom: 12px;
}
.section-label::before {
  content: '';
  display: block;
  width: 24px;
  height: 2px;
  background: var(--coral);
}
.section-h2 {
  font-size: clamp(1.8rem, 3vw, 2.6rem);
  font-weight: 900;
  color: var(--navy);
  line-height: 1.2;
  letter-spacing: -0.02em;
  margin-bottom: 14px;
}
.section-sub {
  font-size: 1.05rem;
  color: var(--slate);
  line-height: 1.7;
  max-width: 580px;
}
.section-header { margin-bottom: 48px; }
.section-header.center { text-align: center; }
.section-header.center .section-sub { margin: 0 auto; }

/* ---- Feature Pillars ---- */
.pillars-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}
.pillar-card {
  background: var(--white);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 32px;
  transition: box-shadow 0.25s, transform 0.25s;
  position: relative;
  overflow: hidden;
}
.pillar-card::before {
  content: '';
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 3px;
  background: linear-gradient(90deg, var(--coral), var(--amber));
  opacity: 0;
  transition: opacity 0.25s;
}
.pillar-card:hover { box-shadow: var(--shadow-md); transform: translateY(-4px); }
.pillar-card:hover::before { opacity: 1; }
.pillar-icon {
  width: 52px; height: 52px;
  border-radius: 14px;
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 20px;
}
.pillar-icon svg { width: 26px; height: 26px; }
.pi-blue { background: rgba(66,133,244,0.1); color: #4285f4; }
.pi-red { background: rgba(232,71,42,0.1); color: var(--coral); }
.pi-green { background: rgba(52,168,83,0.1); color: #34a853; }
.pi-amber { background: rgba(245,166,35,0.12); color: var(--amber); }
.pi-purple { background: rgba(103,58,183,0.1); color: #673ab7; }
.pi-teal { background: rgba(0,150,136,0.1); color: #009688; }
.pillar-num {
  font-size: 0.7rem;
  font-weight: 800;
  letter-spacing: 0.1em;
  color: var(--coral);
  text-transform: uppercase;
  margin-bottom: 10px;
}
.pillar-h3 {
  font-size: 1.15rem;
  font-weight: 800;
  color: var(--navy);
  margin-bottom: 10px;
  line-height: 1.3;
}
.pillar-p {
  font-size: 0.9rem;
  color: var(--slate);
  line-height: 1.7;
}

/* ---- Deep Dive (big alternating rows) ---- */
.deep-dive { background: var(--mist); }
.dive-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 72px;
  align-items: center;
  padding: 64px 0;
  border-bottom: 1px solid var(--border);
}
.dive-row:last-child { border-bottom: none; }
.dive-row.reverse { direction: rtl; }
.dive-row.reverse > * { direction: ltr; }
.dive-visual {
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-lg);
  background: var(--navy);
  aspect-ratio: 4/3;
  display: flex;
  align-items: center;
  justify-content: center;
  position: relative;
}
.dive-illus {
  width: 100%;
  height: 100%;
  padding: 32px;
  display: flex;
  flex-direction: column;
  gap: 16px;
  justify-content: center;
}
.di-bar {
  height: 10px;
  border-radius: 5px;
  background: rgba(255,255,255,0.15);
  overflow: hidden;
  position: relative;
}
.di-bar-fill {
  height: 100%;
  border-radius: 5px;
  background: linear-gradient(90deg, var(--coral), var(--amber));
  animation: barPulse 2.5s ease-in-out infinite;
}
@keyframes barPulse {
  0%, 100% { opacity: 0.8; }
  50% { opacity: 1; }
}
.di-shield {
  margin: 0 auto;
  width: 100px; height: 120px;
  position: relative;
  display: flex;
  align-items: center;
  justify-content: center;
}
.di-shield svg { width: 100px; height: 100px; }
.di-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 10px;
}
.di-cell {
  aspect-ratio: 1;
  border-radius: 10px;
  background: rgba(255,255,255,0.08);
  display: flex;
  align-items: center;
  justify-content: center;
}
.di-cell svg { width: 28px; height: 28px; color: rgba(255,255,255,0.6); }
.di-cell.hi { background: rgba(232,71,42,0.25); }
.di-cell.hi svg { color: var(--coral-light); }
.di-sync-ring {
  width: 160px; height: 160px;
  border-radius: 50%;
  border: 3px solid rgba(66,133,244,0.3);
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: center;
  position: relative;
}
.di-sync-ring::before {
  content: '';
  position: absolute;
  inset: 12px;
  border-radius: 50%;
  border: 2px solid rgba(66,133,244,0.15);
}
.di-sync-center {
  width: 60px; height: 60px;
  border-radius: 50%;
  background: rgba(66,133,244,0.2);
  display: flex;
  align-items: center;
  justify-content: center;
}
.di-sync-center svg { width: 28px; height: 28px; color: #4285f4; }
.dive-copy { min-width: 0; }
.dive-badge {
  display: inline-block;
  background: var(--coral);
  color: white;
  font-size: 0.7rem;
  font-weight: 800;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  padding: 4px 10px;
  border-radius: 4px;
  margin-bottom: 16px;
}
.dive-h2 {
  font-size: clamp(1.5rem, 2.5vw, 2rem);
  font-weight: 900;
  color: var(--navy);
  line-height: 1.25;
  margin-bottom: 16px;
  letter-spacing: -0.02em;
}
.dive-p {
  font-size: 0.95rem;
  color: var(--slate);
  line-height: 1.8;
  margin-bottom: 20px;
}
.dive-list {
  display: flex;
  flex-direction: column;
  gap: 10px;
}
.dive-list li {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  font-size: 0.9rem;
  color: var(--slate);
}
.dive-list li svg {
  width: 16px; height: 16px;
  color: #34a853;
  flex-shrink: 0;
  margin-top: 3px;
}

/* ---- Platform Tiles ---- */
.platform-section { background: var(--navy); color: white; }
.platform-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
}
.platform-tile {
  background: rgba(255,255,255,0.06);
  border: 1px solid rgba(255,255,255,0.1);
  border-radius: var(--radius-lg);
  padding: 28px 20px;
  text-align: center;
  transition: background 0.2s, transform 0.2s, border-color 0.2s;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 14px;
}
.platform-tile:hover {
  background: rgba(255,255,255,0.1);
  transform: translateY(-4px);
  border-color: rgba(255,255,255,0.2);
}
.platform-tile.featured {
  background: rgba(232,71,42,0.15);
  border-color: rgba(232,71,42,0.4);
}
.pt-icon {
  width: 56px; height: 56px;
  border-radius: 14px;
  display: flex;
  align-items: center;
  justify-content: center;
}
.pt-icon svg { width: 30px; height: 30px; }
.pt-windows { background: rgba(0,120,212,0.2); color: #0078d4; }
.pt-mac { background: rgba(255,255,255,0.1); color: white; }
.pt-ios { background: rgba(0,122,255,0.2); color: #007aff; }
.pt-android { background: rgba(52,168,83,0.2); color: #34a853; }
.pt-name {
  font-size: 1rem;
  font-weight: 800;
  color: white;
}
.pt-desc {
  font-size: 0.8rem;
  color: rgba(255,255,255,0.55);
  line-height: 1.5;
}
.pt-badge {
  font-size: 0.7rem;
  font-weight: 700;
  background: var(--coral);
  color: white;
  padding: 3px 10px;
  border-radius: 20px;
}
.platform-tile button { width: 100%; margin-top: 4px; }
.platform-tile .btn { width: 100%; justify-content: center; font-size: 0.85rem; padding: 10px 16px; }

/* ---- Testimonial Wall ---- */
.testi-section { background: var(--white); }
.testi-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
}
.testi-card {
  background: var(--mist);
  border-radius: var(--radius-lg);
  padding: 28px;
  border-left: 4px solid var(--coral);
  transition: box-shadow 0.2s, transform 0.2s;
}
.testi-card:hover { box-shadow: var(--shadow-md); transform: translateY(-3px); }
.testi-stars {
  display: flex;
  gap: 3px;
  margin-bottom: 14px;
}
.testi-stars svg { width: 16px; height: 16px; color: var(--amber); }
.testi-quote {
  font-size: 0.92rem;
  color: var(--ink);
  line-height: 1.75;
  margin-bottom: 18px;
  font-style: italic;
}
.testi-author {
  display: flex;
  align-items: center;
  gap: 10px;
}
.testi-avatar {
  width: 38px; height: 38px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.85rem;
  font-weight: 800;
  color: white;
  flex-shrink: 0;
}
.ta-navy { background: var(--navy); }
.ta-coral { background: var(--coral); }
.ta-green { background: #34a853; }
.ta-amber { background: var(--amber); color: var(--ink); }
.ta-purple { background: #673ab7; }
.ta-teal { background: #009688; }
.testi-name { font-size: 0.88rem; font-weight: 700; color: var(--navy); }
.testi-role { font-size: 0.78rem; color: var(--slate); }

/* ---- FAQ ---- */
.faq-section { background: var(--mist); }
.faq-layout {
  display: grid;
  grid-template-columns: 1fr 2fr;
  gap: 64px;
  align-items: start;
}
.faq-sticky {
  position: sticky;
  top: 88px;
}
.faq-aside-title {
  font-size: 1.6rem;
  font-weight: 900;
  color: var(--navy);
  line-height: 1.3;
  margin-bottom: 16px;
}
.faq-aside-p {
  font-size: 0.9rem;
  color: var(--slate);
  line-height: 1.7;
  margin-bottom: 24px;
}
.faq-list { display: flex; flex-direction: column; gap: 10px; }
.faq-item {
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: var(--white);
  overflow: hidden;
}
.faq-q {
  width: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  padding: 18px 20px;
  background: none;
  font-size: 0.92rem;
  font-weight: 700;
  color: var(--navy);
  text-align: left;
  cursor: pointer;
  transition: background 0.2s;
}
.faq-q:hover { background: var(--mist); }
.faq-q svg { width: 18px; height: 18px; flex-shrink: 0; color: var(--coral); transition: transform 0.3s; }
.faq-item.open .faq-q svg { transform: rotate(45deg); }
.faq-a {
  display: none;
  padding: 0 20px 18px;
  font-size: 0.88rem;
  color: var(--slate);
  line-height: 1.75;
  border-top: 1px solid var(--border);
  padding-top: 16px;
}
.faq-item.open .faq-a { display: block; }

/* ---- CTA Banner ---- */
.cta-section {
  background: linear-gradient(135deg, var(--navy) 0%, var(--navy-mid) 50%, var(--navy-light) 100%);
  color: white;
  text-align: center;
  padding: 80px 24px;
  position: relative;
  overflow: hidden;
}
.cta-section::before {
  content: '';
  position: absolute;
  inset: 0;
  background: radial-gradient(ellipse 80% 80% at 50% 120%, rgba(232,71,42,0.2) 0%, transparent 60%);
  pointer-events: none;
}
.cta-inner { position: relative; z-index: 1; }
.cta-h2 {
  font-size: clamp(1.8rem, 3vw, 2.8rem);
  font-weight: 900;
  margin-bottom: 16px;
  letter-spacing: -0.02em;
}
.cta-sub {
  font-size: 1.05rem;
  color: rgba(255,255,255,0.75);
  margin-bottom: 32px;
  max-width: 520px;
  margin-left: auto;
  margin-right: auto;
  line-height: 1.7;
}
.cta-actions { display: flex; gap: 14px; justify-content: center; flex-wrap: wrap; }

/* ============================================
   DOWNLOAD PAGE
   ============================================ */
.dl-hero {
  background: var(--navy);
  color: white;
  padding: 64px 0;
  position: relative;
  overflow: hidden;
}
.dl-hero::after {
  content: '';
  position: absolute;
  bottom: 0; left: 0; right: 0;
  height: 4px;
  background: linear-gradient(90deg, var(--coral), var(--amber), #34a853, #4285f4);
}
.dl-hero-inner {
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 48px;
  align-items: center;
}
.dl-hero-kicker {
  font-size: 0.72rem;
  font-weight: 800;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--amber);
  margin-bottom: 12px;
}
.dl-hero-h1 {
  font-size: clamp(1.8rem, 3.5vw, 2.8rem);
  font-weight: 900;
  line-height: 1.15;
  margin-bottom: 16px;
  letter-spacing: -0.02em;
}
.dl-hero-sub {
  font-size: 1rem;
  color: rgba(255,255,255,0.72);
  max-width: 520px;
  line-height: 1.7;
}
.dl-ver-badge {
  background: rgba(245,166,35,0.15);
  border: 1px solid rgba(245,166,35,0.4);
  border-radius: var(--radius-lg);
  padding: 24px 32px;
  text-align: center;
  white-space: nowrap;
}
.dl-ver-num {
  font-size: 2.2rem;
  font-weight: 900;
  color: var(--amber);
  line-height: 1;
}
.dl-ver-label {
  font-size: 0.75rem;
  color: rgba(255,255,255,0.5);
  margin-top: 6px;
}
.dl-ver-date {
  font-size: 0.78rem;
  color: rgba(255,255,255,0.4);
  margin-top: 4px;
}

/* Windows Main Card */
.win-card-section { background: var(--white); padding: 64px 0; }
.win-main-card {
  background: var(--navy);
  border-radius: 20px;
  overflow: hidden;
  display: grid;
  grid-template-columns: 1fr 340px;
  box-shadow: var(--shadow-lg);
}
.win-card-left {
  padding: 48px 48px 48px 56px;
  color: white;
}
.win-card-eyebrow {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 0.72rem;
  font-weight: 800;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--amber);
  margin-bottom: 16px;
}
.win-card-eyebrow svg { width: 14px; height: 14px; }
.win-card-h2 {
  font-size: 2rem;
  font-weight: 900;
  margin-bottom: 12px;
  line-height: 1.2;
  letter-spacing: -0.02em;
}
.win-card-desc {
  font-size: 0.95rem;
  color: rgba(255,255,255,0.7);
  line-height: 1.7;
  margin-bottom: 28px;
  max-width: 420px;
}
.win-card-meta {
  display: flex;
  gap: 16px;
  flex-wrap: wrap;
  margin-top: 24px;
}
.win-meta-pill {
  display: flex;
  align-items: center;
  gap: 6px;
  font-size: 0.8rem;
  color: rgba(255,255,255,0.6);
}
.win-meta-pill svg { width: 14px; height: 14px; color: var(--amber); flex-shrink: 0; }
.win-card-right {
  background: rgba(255,255,255,0.05);
  border-left: 1px solid rgba(255,255,255,0.08);
  padding: 48px 32px;
  display: flex;
  flex-direction: column;
  gap: 16px;
  align-items: stretch;
}
.win-card-right .btn { justify-content: center; }
.win-spec-list { display: flex; flex-direction: column; gap: 8px; margin-top: 8px; }
.win-spec-item {
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 0.8rem;
  padding: 6px 0;
  border-bottom: 1px solid rgba(255,255,255,0.06);
  color: rgba(255,255,255,0.6);
}
.win-spec-item:last-child { border-bottom: none; }
.win-spec-val { color: rgba(255,255,255,0.85); font-weight: 600; }

/* Other Platforms */
.other-platforms-section { background: var(--mist); padding: 64px 0; }
.platforms-3col {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
}
.plat-card {
  background: var(--white);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 32px 24px;
  text-align: center;
  transition: box-shadow 0.2s, transform 0.2s;
}
.plat-card:hover { box-shadow: var(--shadow-md); transform: translateY(-3px); }
.plat-card-icon {
  width: 64px; height: 64px;
  border-radius: 18px;
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto 18px;
}
.plat-card-icon svg { width: 34px; height: 34px; }
.pci-mac { background: #f0f0f0; color: #1d1d1f; }
.pci-ios { background: rgba(0,122,255,0.08); color: #007aff; }
.pci-android { background: rgba(52,168,83,0.1); color: #34a853; }
.plat-card-name {
  font-size: 1.1rem;
  font-weight: 800;
  color: var(--navy);
  margin-bottom: 8px;
}
.plat-card-desc {
  font-size: 0.85rem;
  color: var(--slate);
  line-height: 1.6;
  margin-bottom: 20px;
}
.plat-card .btn { width: 100%; justify-content: center; }

/* Requirements Table */
.req-section { background: white; padding: 64px 0; }
.req-tabs {
  display: flex;
  gap: 6px;
  margin-bottom: 32px;
  border-bottom: 2px solid var(--border);
  padding-bottom: 0;
}
.req-tab {
  padding: 10px 20px;
  font-size: 0.88rem;
  font-weight: 700;
  color: var(--slate);
  background: none;
  border: none;
  border-bottom: 2px solid transparent;
  margin-bottom: -2px;
  cursor: pointer;
  transition: color 0.2s, border-color 0.2s;
}
.req-tab:hover { color: var(--navy); }
.req-tab.active { color: var(--navy); border-bottom-color: var(--coral); }
.req-panel { display: none; }
.req-panel.active { display: block; }
.req-table { width: 100%; border-collapse: collapse; }
.req-table th {
  background: var(--navy);
  color: white;
  padding: 12px 18px;
  font-size: 0.85rem;
  font-weight: 700;
  text-align: left;
}
.req-table th:first-child { border-radius: 8px 0 0 0; }
.req-table th:last-child { border-radius: 0 8px 0 0; }
.req-table td {
  padding: 12px 18px;
  font-size: 0.88rem;
  color: var(--slate);
  border-bottom: 1px solid var(--border);
}
.req-table tr:nth-child(even) td { background: var(--mist); }
.req-table td:first-child { font-weight: 700; color: var(--navy); }

/* Install Steps */
.install-section { background: var(--mist); padding: 64px 0; }
.install-steps {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
}
.install-step {
  background: white;
  border-radius: var(--radius-lg);
  padding: 28px 22px;
  position: relative;
  text-align: center;
  box-shadow: var(--shadow-sm);
}
.install-step::after {
  content: '';
  position: absolute;
  top: 42px;
  right: -12px;
  width: 24px;
  height: 2px;
  background: var(--border);
}
.install-step:last-child::after { display: none; }
.step-num {
  width: 44px; height: 44px;
  border-radius: 50%;
  background: var(--navy);
  color: white;
  font-size: 1.1rem;
  font-weight: 900;
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto 16px;
}
.step-icon { margin: 0 auto 14px; width: 40px; height: 40px; display: flex; align-items: center; justify-content: center; }
.step-icon svg { width: 36px; height: 36px; color: var(--coral); }
.step-h3 { font-size: 0.95rem; font-weight: 800; color: var(--navy); margin-bottom: 8px; }
.step-p { font-size: 0.82rem; color: var(--slate); line-height: 1.65; }

/* Security Notice */
.security-notice {
  background: var(--navy);
  color: white;
  padding: 40px 0;
}
.notice-inner {
  display: flex;
  align-items: center;
  gap: 32px;
  flex-wrap: wrap;
}
.notice-icon {
  width: 64px; height: 64px;
  border-radius: 50%;
  background: rgba(52,168,83,0.2);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}
.notice-icon svg { width: 32px; height: 32px; color: #34a853; }
.notice-copy h3 { font-size: 1.1rem; font-weight: 800; margin-bottom: 8px; }
.notice-copy p { font-size: 0.88rem; color: rgba(255,255,255,0.65); line-height: 1.65; }
.notice-list {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 8px;
  flex: 1;
}
.notice-item {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 0.82rem;
  color: rgba(255,255,255,0.7);
}
.notice-item svg { width: 14px; height: 14px; color: #34a853; flex-shrink: 0; }

/* ============================================
   SEO PAGE (zh-cn.html)
   ============================================ */
.seo-hero {
  background: linear-gradient(135deg, var(--navy) 0%, var(--navy-mid) 100%);
  color: white;
  padding: 64px 0;
}
.seo-hero-h1 {
  font-size: clamp(1.8rem, 3.5vw, 2.8rem);
  font-weight: 900;
  line-height: 1.2;
  margin-bottom: 16px;
  letter-spacing: -0.02em;
}
.seo-hero-sub {
  font-size: 1rem;
  color: rgba(255,255,255,0.72);
  line-height: 1.7;
  max-width: 600px;
  margin-bottom: 28px;
}
.seo-tags { display: flex; gap: 8px; flex-wrap: wrap; }
.seo-tag {
  background: rgba(255,255,255,0.1);
  color: rgba(255,255,255,0.75);
  font-size: 0.75rem;
  font-weight: 600;
  padding: 4px 12px;
  border-radius: 20px;
  border: 1px solid rgba(255,255,255,0.15);
}
.seo-layout {
  display: grid;
  grid-template-columns: 1fr 280px;
  gap: 56px;
  align-items: start;
  padding: 64px 0;
}
.seo-article { min-width: 0; }
.seo-toc {
  position: sticky;
  top: 88px;
  background: var(--white);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 24px;
  box-shadow: var(--shadow-sm);
}
.toc-title {
  font-size: 0.8rem;
  font-weight: 800;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--coral);
  margin-bottom: 16px;
}
.toc-list { display: flex; flex-direction: column; gap: 2px; }
.toc-item {
  font-size: 0.85rem;
  color: var(--slate);
  padding: 6px 10px;
  border-radius: 6px;
  transition: color 0.2s, background 0.2s;
  display: flex;
  align-items: center;
  gap: 8px;
}
.toc-item:hover { color: var(--navy); background: var(--mist); }
.toc-item::before {
  content: '';
  width: 4px; height: 4px;
  border-radius: 50%;
  background: var(--coral);
  flex-shrink: 0;
}
.article-section {
  margin-bottom: 56px;
  scroll-margin-top: 88px;
}
.art-h2 {
  font-size: 1.5rem;
  font-weight: 900;
  color: var(--navy);
  margin-bottom: 16px;
  padding-bottom: 12px;
  border-bottom: 2px solid var(--border);
  display: flex;
  align-items: center;
  gap: 10px;
}
.art-h2 svg { width: 22px; height: 22px; color: var(--coral); flex-shrink: 0; }
.art-p {
  font-size: 0.95rem;
  color: var(--slate);
  line-height: 1.85;
  margin-bottom: 16px;
}
.art-h3 {
  font-size: 1.1rem;
  font-weight: 800;
  color: var(--navy);
  margin: 20px 0 10px;
}
.art-ul { display: flex; flex-direction: column; gap: 8px; margin: 12px 0 18px 0; }
.art-ul li {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  font-size: 0.92rem;
  color: var(--slate);
  line-height: 1.7;
}
.art-ul li svg {
  width: 16px; height: 16px;
  color: var(--coral);
  flex-shrink: 0;
  margin-top: 3px;
}
.art-infobox {
  background: rgba(66,133,244,0.06);
  border-left: 3px solid #4285f4;
  border-radius: 0 8px 8px 0;
  padding: 16px 20px;
  margin: 16px 0 20px;
  font-size: 0.9rem;
  color: var(--ink);
  line-height: 1.7;
}

/* Comparison Table */
.compare-table-wrap { overflow-x: auto; margin: 20px 0; }
.compare-table { width: 100%; border-collapse: collapse; min-width: 560px; }
.compare-table thead th {
  background: var(--navy);
  color: white;
  padding: 14px 16px;
  font-size: 0.85rem;
  font-weight: 700;
  text-align: center;
}
.compare-table thead th:first-child { text-align: left; background: var(--navy-mid); }
.compare-table thead th.hl { background: var(--coral); }
.compare-table tbody tr:nth-child(even) td { background: var(--mist); }
.compare-table td {
  padding: 12px 16px;
  font-size: 0.87rem;
  color: var(--slate);
  text-align: center;
  border-bottom: 1px solid var(--border);
}
.compare-table td:first-child { text-align: left; font-weight: 700; color: var(--navy); }
.ct-yes { color: #34a853; font-weight: 700; }
.ct-no { color: #dc3545; }
.ct-partial { color: var(--amber); font-weight: 600; }

/* Version table */
.ver-table { width: 100%; border-collapse: collapse; margin: 16px 0; }
.ver-table th {
  background: var(--mist);
  padding: 10px 16px;
  font-size: 0.82rem;
  font-weight: 700;
  color: var(--navy);
  text-align: left;
  border-bottom: 2px solid var(--border);
}
.ver-table td {
  padding: 10px 16px;
  font-size: 0.85rem;
  color: var(--slate);
  border-bottom: 1px solid var(--border);
}
.ver-table td:first-child { font-weight: 700; color: var(--navy); font-family: monospace; }
.ver-badge-new {
  display: inline-block;
  background: var(--coral);
  color: white;
  font-size: 0.65rem;
  font-weight: 700;
  padding: 2px 6px;
  border-radius: 4px;
  margin-left: 6px;
  vertical-align: middle;
}

/* Tips grid */
.tips-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 16px;
  margin: 16px 0;
}
.tip-card {
  background: var(--white);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 20px;
  display: flex;
  gap: 14px;
}
.tip-icon {
  width: 36px; height: 36px;
  border-radius: 10px;
  background: rgba(232,71,42,0.1);
  color: var(--coral);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}
.tip-icon svg { width: 18px; height: 18px; }
.tip-h { font-size: 0.88rem; font-weight: 800; color: var(--navy); margin-bottom: 4px; }
.tip-p { font-size: 0.82rem; color: var(--slate); line-height: 1.6; }

/* CTA Box */
.seo-cta-box {
  background: linear-gradient(135deg, var(--navy), var(--navy-mid));
  color: white;
  border-radius: 20px;
  padding: 48px;
  text-align: center;
  margin-top: 32px;
  position: relative;
  overflow: hidden;
}
.seo-cta-box::before {
  content: '';
  position: absolute;
  inset: 0;
  background: radial-gradient(ellipse at 50% 120%, rgba(232,71,42,0.25) 0%, transparent 60%);
}
.seo-cta-inner { position: relative; z-index: 1; }
.seo-cta-h2 {
  font-size: 1.8rem;
  font-weight: 900;
  margin-bottom: 12px;
  letter-spacing: -0.02em;
}
.seo-cta-p {
  font-size: 0.95rem;
  color: rgba(255,255,255,0.72);
  margin-bottom: 28px;
  line-height: 1.7;
}
.seo-cta-btn {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  background: var(--coral);
  color: white;
  padding: 16px 36px;
  border-radius: 10px;
  font-size: 1rem;
  font-weight: 800;
  transition: background 0.2s, transform 0.2s;
  box-shadow: 0 6px 24px rgba(232,71,42,0.4);
}
.seo-cta-btn:hover { background: var(--coral-light); transform: translateY(-2px); }
.seo-cta-btn svg { width: 20px; height: 20px; }

/* ---- Footer ---- */
.site-footer {
  background: var(--ink);
  color: rgba(255,255,255,0.55);
  padding: 40px 0 28px;
}
.footer-inner {
  display: flex;
  flex-direction: column;
  gap: 24px;
}
.footer-top {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 32px;
  flex-wrap: wrap;
}
.footer-brand {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 8px;
}
.footer-brand svg { width: 28px; height: 28px; }
.footer-brand-name { font-size: 0.95rem; font-weight: 700; color: rgba(255,255,255,0.8); }
.footer-desc { font-size: 0.8rem; line-height: 1.7; max-width: 280px; }
.footer-links { display: flex; gap: 24px; flex-wrap: wrap; align-items: flex-start; }
.footer-link {
  font-size: 0.82rem;
  color: rgba(255,255,255,0.45);
  transition: color 0.2s;
}
.footer-link:hover { color: rgba(255,255,255,0.8); }
.footer-bottom {
  padding-top: 20px;
  border-top: 1px solid rgba(255,255,255,0.08);
  display: flex;
  flex-direction: column;
  gap: 8px;
}
.footer-safe {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 0.8rem;
  color: rgba(255,255,255,0.6);
}
.footer-safe svg { width: 14px; height: 14px; color: #34a853; flex-shrink: 0; }
.footer-copy {
  font-size: 0.78rem;
  color: rgba(255,255,255,0.35);
}

/* ---- Utilities ---- */
.text-center { text-align: center; }
.mt-8 { margin-top: 8px; }
.mt-16 { margin-top: 16px; }
.mt-24 { margin-top: 24px; }
.mb-0 { margin-bottom: 0; }

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

/* ============================================
   RESPONSIVE
   ============================================ */
@media (max-width: 1024px) {
  .pillars-grid { grid-template-columns: repeat(2, 1fr); }
  .platform-grid { grid-template-columns: repeat(2, 1fr); }
  .testi-grid { grid-template-columns: repeat(2, 1fr); }
  .install-steps { grid-template-columns: repeat(2, 1fr); }
  .install-step::after { display: none; }
  .faq-layout { grid-template-columns: 1fr; }
  .faq-sticky { position: static; }
  .seo-layout { grid-template-columns: 1fr; }
  .seo-toc { position: static; }
  .dive-row { grid-template-columns: 1fr; gap: 32px; }
  .dive-row.reverse { direction: ltr; }
  .dive-visual { aspect-ratio: 16/7; }
  .win-main-card { grid-template-columns: 1fr; }
  .win-card-right { border-left: none; border-top: 1px solid rgba(255,255,255,0.08); }
  .dl-hero-inner { grid-template-columns: 1fr; }
  .dl-ver-badge { text-align: left; }
}
@media (max-width: 768px) {
  .hero-inner { grid-template-columns: 1fr; }
  .hero-right { display: none; }
  .hero-left { padding: 56px 0; }
  .pillars-grid { grid-template-columns: 1fr; }
  .platform-grid { grid-template-columns: 1fr 1fr; }
  .testi-grid { grid-template-columns: 1fr; }
  .platforms-3col { grid-template-columns: 1fr; }
  .install-steps { grid-template-columns: 1fr; }
  .tips-grid { grid-template-columns: 1fr; }
  .nav-dl-btn { display: none; }
  .brand span:not(.brand-sub) { display: none; }
  .hero-stats { gap: 20px; }
  .notice-inner { flex-direction: column; }
  .notice-list { grid-template-columns: 1fr; }
  .footer-top { flex-direction: column; }
}
@media (max-width: 480px) {
  .nav-links { gap: 2px; }
  .nav-link { padding: 6px 10px; font-size: 0.82rem; }
  .platform-grid { grid-template-columns: 1fr; }
  .section { padding: 56px 0; }
  .hero-h1 { font-size: 2rem; }
  .win-card-left { padding: 32px 24px; }
  .win-card-right { padding: 28px 24px; }
}