:root {
  --bg: #ffffff; --panel: #f5f7fb; --text: #1b1f27; --muted: #5b6472; --line: #e1e5ec;
  --accent: #1a73e8; --accent-text: #ffffff; --ok: #0f7a43;
}
@media (prefers-color-scheme: dark) {
  :root { --bg: #14171c; --panel: #1d2128; --text: #e8eaed; --muted: #a0a7b3; --line: #2d333d; --accent: #8ab4f8; --accent-text: #0b1b33; --ok: #6fdc9f; }
}
* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0; background: var(--bg); color: var(--text);
  font: 16px/1.7 system-ui, -apple-system, "Segoe UI", "Hiragino Sans", "Yu Gothic UI", sans-serif;
}
.wrap { max-width: 880px; margin: 0 auto; padding: 0 20px; }
header.top { border-bottom: 1px solid var(--line); }
header.top .wrap { display: flex; align-items: center; gap: 16px; height: 60px; }
header.top a.brand { display: flex; align-items: center; gap: 10px; color: var(--text); text-decoration: none; font-weight: 700; }
header.top img { width: 28px; height: 28px; border-radius: 6px; }
header.top nav { margin-left: auto; display: flex; gap: 16px; font-size: 14px; }
header.top nav a { color: var(--muted); text-decoration: none; }
header.top nav a:hover { color: var(--text); }
.hero { padding: 56px 0 28px; text-align: center; }
.hero h1 { font-size: clamp(28px, 5vw, 42px); line-height: 1.25; margin: 0 0 12px; }
.hero p.sub { color: var(--muted); font-size: 18px; margin: 0 auto 24px; max-width: 640px; }
.cta { display: flex; gap: 12px; justify-content: center; flex-wrap: wrap; }
.btn { display: inline-block; padding: 10px 20px; border-radius: 8px; font-weight: 600; text-decoration: none; border: 1px solid var(--accent); }
.btn.primary { background: var(--accent); color: var(--accent-text); }
.btn.ghost { color: var(--accent); }
.btn.disabled { opacity: .55; pointer-events: none; }
.shot { margin: 28px auto 0; max-width: 860px; }
.shot img { width: 100%; height: auto; border-radius: 12px; border: 1px solid var(--line); box-shadow: 0 8px 30px rgba(0,0,0,.12); }
section { padding: 36px 0; }
section h2 { font-size: 26px; margin: 0 0 14px; }
.grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(240px, 1fr)); gap: 16px; }
.card { background: var(--panel); border: 1px solid var(--line); border-radius: 12px; padding: 16px 18px; }
.card h3 { margin: 0 0 6px; font-size: 17px; }
.card p, .card li { color: var(--muted); margin: 6px 0; }
.card ul { margin: 6px 0; padding-left: 20px; }
.price { font-size: 32px; font-weight: 800; margin: 4px 0; }
.price small { font-size: 14px; font-weight: 400; color: var(--muted); }
table { width: 100%; border-collapse: collapse; margin: 10px 0; font-size: 15px; }
th, td { border-bottom: 1px solid var(--line); padding: 8px 6px; text-align: left; vertical-align: top; }
th { color: var(--muted); font-weight: 600; }
details { border-bottom: 1px solid var(--line); padding: 10px 0; }
summary { cursor: pointer; font-weight: 600; }
details p { color: var(--muted); margin: 8px 0 0; }
.doc h1 { font-size: 32px; margin: 36px 0 6px; }
.doc h2 { font-size: 21px; margin: 28px 0 8px; }
.doc p, .doc li { color: var(--text); }
.doc .meta { color: var(--muted); font-size: 14px; }
.note { background: var(--panel); border-left: 4px solid var(--accent); padding: 10px 14px; border-radius: 6px; color: var(--muted); }
footer { border-top: 1px solid var(--line); margin-top: 24px; padding: 24px 0 40px; color: var(--muted); font-size: 14px; }
footer a { color: var(--muted); }
.lang { font-size: 13px; border: 1px solid var(--line); border-radius: 6px; padding: 2px 8px; }