:root {
  --bg: #f5f7fb; --fg: #111827; --muted: #5b6474; --card: #ffffff; --line: #e3e8f0;
  --accent: #1b3a8c; --accent2: #0fa3b1; --warm: #ff9f0a;
  color-scheme: light dark;
}
@media (prefers-color-scheme: dark) {
  :root { --bg: #0b1020; --fg: #eef2f8; --muted: #9aa6b8; --card: #121a2e; --line: #243049; --accent: #7fb2ff; }
}
* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body { margin: 0; overflow-wrap: anywhere; background: var(--bg); color: var(--fg);
  font: 16px/1.65 -apple-system, BlinkMacSystemFont, "SF Pro Text", "Hiragino Sans", "PingFang SC", "Apple SD Gothic Neo", "Segoe UI", Roboto, sans-serif; }
.wrap { max-width: 760px; margin: 0 auto; padding: 0 16px; }
a { color: var(--accent); }
header.site { position: sticky; top: 0; z-index: 1; background: color-mix(in srgb, var(--bg) 85%, transparent);
  backdrop-filter: saturate(1.6) blur(16px); -webkit-backdrop-filter: saturate(1.6) blur(16px); border-bottom: 1px solid var(--line); }
header.site .wrap { display: flex; align-items: center; justify-content: space-between; gap: 12px; min-height: 56px; flex-wrap: wrap; }
.brand { display: flex; align-items: center; gap: 8px; font-weight: 700; color: var(--fg); text-decoration: none; }
.brand img { border-radius: 7px; }
nav { display: flex; gap: 14px; flex-wrap: wrap; }
nav a { color: var(--muted); text-decoration: none; font-size: 15px; }
nav a[aria-current="page"] { color: var(--fg); font-weight: 600; }
main { padding: 28px 0 48px; }
h1 { font-size: 30px; line-height: 1.25; margin: 8px 0 12px; }
h2 { font-size: 21px; margin: 32px 0 8px; }
h3 { font-size: 17px; margin: 22px 0 6px; }
.meta { color: var(--muted); font-size: 14px; }
.box { background: var(--card); border: 1px solid var(--line); border-left: 4px solid var(--accent2); border-radius: 12px; padding: 14px 16px; margin: 16px 0; }
ul { padding-left: 1.2em; }
.table-wrap { overflow-x: auto; }
table { border-collapse: collapse; width: 100%; font-size: 14px; }
th, td { text-align: left; vertical-align: top; border-bottom: 1px solid var(--line); padding: 8px 10px 8px 0; }
.hero { text-align: center; padding: 24px 0 8px; }
.app-icon { border-radius: 28px; box-shadow: 0 12px 32px rgba(15, 40, 90, .25); }
.lead { font-size: 19px; color: var(--muted); max-width: 560px; margin: 0 auto 18px; }
.cta { display: inline-block; background: linear-gradient(180deg, var(--accent), var(--accent2)); color: #fff; font-weight: 600;
  padding: 12px 22px; border-radius: 999px; text-decoration: none; }
.cta.disabled { opacity: .8; }
.pills { display: flex; gap: 8px; justify-content: center; flex-wrap: wrap; }
.pills span { border: 1px solid var(--line); background: var(--card); border-radius: 999px; padding: 4px 12px; font-size: 14px; color: var(--muted); }
.features { display: grid; grid-template-columns: repeat(auto-fit, minmax(min(220px, 100%), 1fr)); gap: 14px; margin-top: 28px; }
.features div { background: var(--card); border: 1px solid var(--line); border-radius: 16px; padding: 16px; }
.features h2 { font-size: 17px; margin: 0 0 6px; }
.features p { margin: 0; color: var(--muted); font-size: 15px; }
.note { text-align: center; color: var(--muted); margin-top: 28px; }
footer { border-top: 1px solid var(--line); color: var(--muted); font-size: 14px; padding: 20px 0 36px; }
.langs { display: flex; gap: 12px; flex-wrap: wrap; }
.hero .langs { justify-content: center; }