:root{
  --bg:#f4f6f4;
  --panel:#ffffff;
  --panel2:#edf2ed;
  --text:#15211b;
  --muted:#5f6f66;
  --accent:#1c8a53;
  --accent2:#0c5633;
  --border:rgba(17,37,24,.12);
  --hero:linear-gradient(180deg,#ffffff 0%,#f6f8f6 100%);
  --shell:#ffffff;
  --shadow:0 16px 40px rgba(0,0,0,.10);
  --radius:22px;
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{
  margin:0;
  background:var(--bg);
  color:var(--text);
  font-family:Arial,Helvetica,sans-serif;
  line-height:1.65;
}
a{text-decoration:none;color:inherit}
img{display:block;max-width:100%}
button,input{font:inherit}
.container{width:min(1120px,calc(100% - 32px));margin:0 auto}
.site-header{
  position:sticky;top:0;z-index:50;
  background:rgba(255,255,255,.92);
  backdrop-filter:blur(10px);
  border-bottom:1px solid var(--border);
}
.header-inner{
  min-height:70px;
  display:flex;align-items:center;justify-content:space-between;gap:18px;
}
.brand img{height:32px;width:auto}
.site-nav{display:flex;align-items:center;gap:18px;flex-wrap:wrap}
.site-nav a{font-size:14px;color:var(--muted)}
.menu-toggle{display:none;border:1px solid var(--border);background:var(--panel);color:var(--text);border-radius:999px;padding:10px 14px}
.nav-cta,.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  border-radius:999px;border:1px solid transparent;
  padding:12px 18px;font-weight:700;
  transition:transform .18s ease,background .18s ease,border-color .18s ease;
}
.btn:hover,.nav-cta:hover{transform:translateY(-1px)}
.btn-primary,.nav-cta{background:var(--accent);color:#07150f}
.btn-secondary{background:transparent;color:var(--text);border-color:var(--border)}
.hero{position:relative;overflow:hidden}
.hero::before{content:"";position:absolute;inset:0;background:var(--hero);z-index:-1}
.hero .container{position:relative}
.hero-grid{display:grid;gap:24px;align-items:center;padding:52px 0 28px}
.hero-copy h1,
.hero-ios-wrap h1,
.hero-mac-wrap h1,
.hero-guide-wrap h1,
.hero-help-wrap h1,
.hero-version-wrap h1{
  margin:10px 0 12px;
  font-size:clamp(30px,4vw,52px);
  line-height:1.12;
  word-break:keep-all;
  overflow-wrap:normal;
  hyphens:none;
}
.hero-lead{margin:0;color:var(--muted);font-size:16px;max-width:56ch}
.hero-lead-center{margin:0 auto;color:var(--muted);max-width:52ch;text-align:center}
.eyebrow{
  display:inline-flex;align-items:center;gap:8px;
  padding:6px 12px;border-radius:999px;
  background:rgba(255,255,255,.08);border:1px solid rgba(255,255,255,.12);
  color:var(--accent);font-weight:700;font-size:13px;
}
.hero-actions{display:flex;flex-wrap:wrap;gap:12px;margin-top:20px}
.hero-actions-center{justify-content:center}
.section{padding:28px 0}
.section-soft{background:rgba(255,255,255,.35)}
.section-head{margin-bottom:16px}
.section-head h2{margin:0 0 8px;font-size:24px}
.section-head p{margin:0;color:var(--muted)}
.checklist{
  list-style:none;margin:0;padding:0;
  display:grid;gap:12px;
}
.checklist li{
  position:relative;
  padding:14px 16px 14px 44px;
  background:var(--panel);
  border:1px solid var(--border);
  border-radius:18px;
}
.checklist li::before{
  content:"✓";
  position:absolute;left:14px;top:12px;
  width:20px;height:20px;border-radius:50%;
  display:grid;place-items:center;
  background:var(--accent);color:#08130c;font-weight:700;
}
.note-card,.aside-box,.help-category-card,.help-index-card,.version-prep-card,.device-card,.preview-card,.guide-system-card,.system-box,.compare-card,.apk-check,.hero-card-shell,.window-shell,.faq-group,.system-table-card,.step-item{
  background:var(--panel);
  border:1px solid var(--border);
  border-radius:var(--radius);
  box-shadow:var(--shadow);
}
.note-card,.aside-box,.help-category-card,.help-index-card,.version-prep-card,.guide-system-card,.system-box,.compare-card,.apk-check,.faq-group,.system-table-card,.step-item{padding:20px 22px}
.note-card h2,.aside-box h3,.help-category-card strong,.help-index-card strong,.version-prep-card strong,.guide-system-card{margin:0 0 8px}
.note-card p,.aside-box p,.help-category-card,.help-index-card span,.version-prep-card span,.guide-system-card,.device-card p,.preview-card p,.compare-card p,.system-box p{color:var(--muted)}
.faq-accordion,
.faq-split-grid{display:grid;gap:12px}
.faq-accordion details{
  background:var(--panel);
  border:1px solid var(--border);
  border-radius:18px;
  padding:0 16px;
}
.faq-accordion summary{cursor:pointer;padding:16px 0;font-weight:700}
.faq-accordion div{padding:0 0 16px;color:var(--muted)}
.site-footer{
  margin-top:20px;
  border-top:1px solid var(--border);
}
.footer-brand{display:flex;align-items:center;gap:10px;font-weight:700}
.footer-brand img{height:30px;width:auto}
.footer-grid-a,.footer-grid-b,.footer-grid-c,.footer-grid-d{padding:28px 0}
.footer-grid-a h2,.footer-grid-b h2,.footer-grid-c h2{margin:0 0 10px;font-size:16px}
.footer-grid-a p,.footer-grid-b p,.footer-grid-c p,.footer-grid-d p,
.footer-grid-a a,.footer-grid-b a,.footer-grid-c a,.footer-grid-d a{display:block;color:var(--muted);margin:0 0 8px}
.footer-brand-col,.footer-b-col{min-width:0}
.hero-card-shell img,
.device-card img,
.preview-card img,
.mac-download-card img{max-width:100%;border-radius:18px}
.timeline{list-style:none;margin:0;padding:0;display:grid;gap:12px}
.timeline li{
  display:grid;grid-template-columns:auto 1fr;gap:14px;align-items:start;
  background:var(--panel);border:1px solid var(--border);border-radius:18px;padding:16px;
}
.timeline li span{
  width:40px;height:40px;border-radius:12px;
  display:grid;place-items:center;
  background:var(--accent);color:#08130c;font-weight:800;
}
.timeline li p{margin:0;color:var(--muted)}
.simple-table{width:100%;border-collapse:collapse}
.simple-table th,.simple-table td{padding:14px 16px;border-bottom:1px solid var(--border);text-align:left;vertical-align:top}
.simple-table th{white-space:nowrap}
.hero-grid.hero-android-grid,
.hero-grid.hero-app-grid,
.hero-grid.hero-mobile-grid,
.hero-grid.hero-windows-grid{grid-template-columns:1fr 1fr}
.hero-grid.hero-windows-grid .hero-copy{order:2}
.hero-grid.hero-windows-grid .hero-window-shell{order:1}
.hero-grid.hero-app-grid .hero-copy{order:2}
.hero-grid.hero-app-grid .phone-frame{order:1}
.hero-grid.hero-mobile-grid .hero-copy{order:1}
.hero-grid.hero-mobile-grid .system-compare{order:2}
.hero-grid.hero-version-wrap,
.hero-grid.hero-guide-wrap,
.hero-grid.hero-ios-wrap,
.hero-grid.hero-help-wrap,
.hero-grid.hero-mac-wrap{padding:54px 0 24px;text-align:center}
@media (max-width: 960px){
  .hero-grid.hero-android-grid,
  .hero-grid.hero-app-grid,
  .hero-grid.hero-mobile-grid,
  .hero-grid.hero-windows-grid,
  .split-layout,
  .windows-grid,
  .windows-step-grid,
  .ios-device-grid,
  .preview-grid,
  .guide-system-grid,
  .compare-grid,
  .help-category-grid,
  .help-index-grid,
  .version-prep-grid,
  .faq-split-grid{
    grid-template-columns:1fr;
  }
  .menu-toggle{display:inline-flex}
  .site-nav{
    display:none;
    position:absolute;left:16px;right:16px;top:70px;
    background:var(--panel);border:1px solid var(--border);
    border-radius:18px;padding:14px;box-shadow:var(--shadow)
  }
  .site-nav.is-open{display:grid}
}
@media (max-width: 640px){
  .container{width:min(100% - 24px,1120px)}
  .header-inner{min-height:64px}
  .brand img{height:28px}
  .hero-copy h1,
  .hero-ios-wrap h1,
  .hero-mac-wrap h1,
  .hero-guide-wrap h1,
  .hero-help-wrap h1,
  .hero-version-wrap h1{
    font-size:clamp(28px,8vw,38px);
    word-break:normal;
    overflow-wrap:anywhere;
  }
  .btn,.nav-cta{width:100%}
  .hero-actions{flex-direction:column}
  .hero-actions .btn{width:100%}
}

      body[data-page="page-ios"] .hero-copy h1 { max-width: 14ch; }
      body[data-page="page-ios"] .hero-ios-wrap { padding: 56px 0 18px; text-align:center; }
      body[data-page="page-ios"] .hero-lead-center { margin: 0 auto; }
      body[data-page="page-ios"] .hero-step-track { display:flex; flex-wrap:wrap; justify-content:center; gap:10px; margin-top:22px; }
      body[data-page="page-ios"] .hero-step-track span { padding:10px 14px; border-radius:999px; background:var(--panel); border:1px solid var(--border); box-shadow:var(--shadow); }
      body[data-page="page-ios"] .hero-actions-center { justify-content:center; }
      body[data-page="page-ios"] .timeline-ios li { background: var(--panel); }
      body[data-page="page-ios"] .ios-device-grid { display:grid; grid-template-columns:repeat(2,minmax(0,1fr)); gap:16px; }
      body[data-page="page-ios"] .device-card { background:var(--panel); border:1px solid var(--border); border-radius:22px; padding:18px; box-shadow:var(--shadow); }
      body[data-page="page-ios"] .device-card h3 { margin:0 0 8px; }
      body[data-page="page-ios"] .device-card p { margin:0 0 12px; color:var(--muted); }
      body[data-page="page-ios"] .device-card img { border-radius:18px; border:1px solid var(--border); }
      body[data-page="page-ios"] .note-card-ios { background: #fff; border:1px solid var(--border); border-radius:22px; padding:20px 22px; }
      body[data-page="page-ios"] .note-card-ios p { color:var(--muted); }
      body[data-page="page-ios"] .footer-b { background:#ffffff; border-top:1px solid var(--border); }
      body[data-page="page-ios"] .footer-grid-b { display:grid; grid-template-columns:.7fr .7fr 1.2fr; gap:20px; padding:28px 0; align-items:start; }
      body[data-page="page-ios"] .footer-b-col h2 { margin:0 0 10px; font-size:16px; }
      body[data-page="page-ios"] .footer-b-col a,
      body[data-page="page-ios"] .footer-brand-col p { display:block; margin:0 0 8px; color:var(--muted); }
      body[data-page="page-ios"] .footer-brand { display:flex; align-items:center; gap:10px; font-weight:700; }