* { box-sizing: border-box; }
:root {
  color-scheme: light dark;
  --bg: #f2f7ff;
  --surface: rgba(255, 255, 255, 0.88);
  --surface-strong: #ffffff;
  --text: #101827;
  --muted: #5c697b;
  --border: rgba(16, 24, 39, 0.12);
  --primary: #0a84ff;
  --primary-dark: #063f8f;
  --cyan: #54d2ff;
  --ink: #111827;
  --green: #30d158;
  --shadow: 0 24px 70px rgba(6, 63, 143, 0.16);
}
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #07111f;
    --surface: rgba(15, 23, 42, 0.88);
    --surface-strong: #111827;
    --text: #eef6ff;
    --muted: #aebbd0;
    --border: rgba(255, 255, 255, 0.12);
    --shadow: 0 24px 70px rgba(0, 0, 0, 0.42);
  }
}
html, body { min-height: 100%; margin: 0; }
body {
  color: var(--text);
  background:
    radial-gradient(circle at 18% 12%, rgba(84, 210, 255, 0.24), transparent 28%),
    radial-gradient(circle at 82% 8%, rgba(10, 132, 255, 0.22), transparent 30%),
    linear-gradient(145deg, rgba(6, 63, 143, 0.14), transparent 42%),
    var(--bg);
  font-family: Avenir Next, Avenir, Trebuchet MS, Segoe UI, sans-serif;
  line-height: 1.62;
}
a { color: inherit; text-decoration: none; }
a:hover { text-decoration: underline; }
.page { padding: 28px 0 48px; }
.container { width: min(1120px, calc(100% - 32px)); margin: 0 auto; }
.topbar { display: flex; flex-wrap: wrap; align-items: center; justify-content: space-between; gap: 18px; margin-bottom: 22px; }
.brand { display: inline-flex; align-items: center; gap: 10px; font-weight: 900; letter-spacing: -0.02em; }
.brand img { border-radius: 10px; box-shadow: 0 10px 24px rgba(10, 132, 255, 0.25); }
.nav { display: flex; flex-wrap: wrap; align-items: center; justify-content: flex-end; gap: 14px; }
.nav a, .language-switch { min-height: 34px; display: inline-flex; align-items: center; color: var(--muted); font-size: 14px; font-weight: 800; line-height: 1; }
.nav a.active { color: var(--primary); }
.language-switch { gap: 8px; }
.language-switch select { height: 34px; padding: 0 32px 0 10px; border: 1px solid var(--border); border-radius: 9px; background: var(--surface-strong); color: var(--text); font: inherit; }
.hero { min-height: calc(100vh - 118px); display: grid; grid-template-columns: minmax(0, 1.03fr) minmax(320px, 430px); align-items: center; gap: 44px; }
.kicker { width: fit-content; margin: 0 0 14px; padding: 7px 12px; border: 1px solid var(--border); border-radius: 999px; color: var(--primary); background: var(--surface); font-size: 13px; font-weight: 900; }
h1, h2 { margin: 0 0 12px; line-height: 1.08; letter-spacing: -0.035em; }
h1 { font-size: clamp(42px, 6.6vw, 74px); }
h2 { font-size: clamp(26px, 4vw, 34px); }
.lead { max-width: 680px; margin: 0; color: var(--muted); font-size: 20px; }
.actions { display: flex; flex-wrap: wrap; gap: 12px; margin-top: 28px; }
.button { min-height: 48px; display: inline-flex; align-items: center; justify-content: center; gap: 9px; padding: 0 18px; border: 1px solid var(--border); border-radius: 11px; background: var(--surface-strong); color: var(--text); font-weight: 900; box-shadow: 0 10px 24px rgba(6, 63, 143, 0.10); }
.button.primary { border-color: transparent; background: linear-gradient(135deg, var(--primary-dark), var(--primary), var(--cyan)); color: #fff; }
.button.ghost { background: rgba(10, 132, 255, 0.10); color: var(--primary); }
.button.compact { align-self: start; }
.store-icon { width: 20px; height: 20px; flex: 0 0 auto; border-radius: 5px; }
.product-panel { overflow: hidden; border: 1px solid var(--border); border-radius: 18px; background: #0f172a; color: #dbeafe; box-shadow: var(--shadow); transform: rotate(1.2deg); }
.window-bar { display: flex; gap: 8px; padding: 14px 16px; background: #111827; }
.window-bar span { width: 12px; height: 12px; border-radius: 50%; background: #ff5f57; }
.window-bar span:nth-child(2) { background: #ffbd2e; }
.window-bar span:nth-child(3) { background: #28c840; }
.file-tabs { display: flex; gap: 8px; padding: 12px 16px; border-bottom: 1px solid rgba(255,255,255,0.1); color: #93c5fd; font-size: 13px; font-weight: 800; }
.file-tabs span { padding: 5px 9px; border-radius: 999px; background: rgba(10, 132, 255, 0.14); }
pre { margin: 0; padding: 18px; overflow: auto; color: #d1d5db; font: 14px/1.65 ui-monospace, SFMono-Regular, Menlo, Consolas, monospace; }
.section { margin-top: 34px; padding: 28px; border: 1px solid var(--border); border-radius: 22px; background: var(--surface); box-shadow: var(--shadow); }
.feature-grid { display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); gap: 14px; }
.feature-grid.two, .compact-grid { grid-template-columns: repeat(3, minmax(0, 1fr)); }
.feature { padding: 18px; border: 1px solid var(--border); border-radius: 16px; background: var(--surface-strong); }
.feature strong { display: block; margin-bottom: 8px; font-size: 17px; }
.feature p, .faq-item p, .support-card p, .footer { margin: 0; color: var(--muted); }
.split { display: flex; align-items: flex-start; justify-content: space-between; gap: 24px; }
.article-page { width: min(860px, 100%); margin: 0 auto; }
.article-hero, .faq-item, .support-card { margin-top: 18px; padding: 28px; border: 1px solid var(--border); border-radius: 22px; background: var(--surface); box-shadow: var(--shadow); }
.faq-list { display: grid; gap: 14px; margin-top: 18px; }
.faq-item h2 { font-size: 22px; }
.mail { display: inline-flex; margin-bottom: 10px; color: var(--primary); font-size: 22px; font-weight: 900; }
.footer { margin-top: 28px; font-size: 14px; }
@media (max-width: 860px) {
  .hero { min-height: auto; grid-template-columns: 1fr; }
  .product-panel { transform: none; }
  .feature-grid, .feature-grid.two, .compact-grid { grid-template-columns: 1fr; }
  .split { display: block; }
  .button.compact { margin-top: 16px; }
}
.format-list {
  margin: 18px 0 0;
  color: var(--muted);
  font-size: 15px;
}

.format-list strong {
  color: var(--text);
}