:root {
  --bg: #ffffff; --fg: #1d2330; --muted: #5b6475; --line: #e3e7ee; --card: #f6f8fb;
  --accent: #1f5fbf; --accent-fg: #ffffff; --ok: #1d7a46; --ng: #b3261e;
}
@media (prefers-color-scheme: dark) {
  :root { --bg: #11151c; --fg: #e8ebf0; --muted: #a3acbb; --line: #2a313d; --card: #1a2029; --accent: #6ea0ff; --accent-fg: #0b1220; --ok: #6fd39c; --ng: #ff8a80; }
}
* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body { margin: 0; background: var(--bg); color: var(--fg); font: 16px/1.8 system-ui, -apple-system, "Hiragino Sans", "Noto Sans JP", "Yu Gothic UI", sans-serif; }
a { color: var(--accent); }
.wrap { max-width: 1040px; margin: 0 auto; padding: 0 16px; }
.narrow { max-width: 680px; }
.top { display: flex; justify-content: space-between; align-items: center; gap: 12px; padding: 12px 16px; border-bottom: 1px solid var(--line); flex-wrap: wrap; }
.brand { font-weight: 700; color: var(--fg); text-decoration: none; font-size: 18px; }
.top nav { display: flex; gap: 14px; align-items: center; font-size: 14px; }
.top nav a { color: var(--muted); text-decoration: none; }
.top nav a.cta-mini { color: var(--accent-fg); background: var(--accent); padding: 4px 12px; border-radius: 999px; }
.hero { padding: 56px 16px 40px; }
.eyebrow { color: var(--accent); font-weight: 700; font-size: 14px; margin: 0; }
h1 { font-size: clamp(26px, 5vw, 40px); line-height: 1.35; margin: 8px 0 16px; }
.lead { color: var(--muted); max-width: 640px; }
.btn { display: inline-block; background: var(--accent); color: var(--accent-fg); border: 0; border-radius: 10px; padding: 12px 22px; font-size: 16px; font-weight: 700; text-decoration: none; cursor: pointer; }
.btn:disabled { opacity: .6; cursor: wait; }
.small { font-size: 13px; color: var(--muted); }
.grid3 { display: grid; grid-template-columns: repeat(auto-fit, minmax(240px, 1fr)); gap: 16px; padding-top: 8px; padding-bottom: 8px; }
.card { background: var(--card); border: 1px solid var(--line); border-radius: 12px; padding: 18px; }
.card h2, .card h3 { font-size: 18px; margin: 0 0 6px; }
.card p { margin: 0; color: var(--muted); }
.plan .price { font-size: 22px; font-weight: 700; color: var(--fg); margin: 6px 0; }
.plan .price span { font-size: 12px; font-weight: 400; color: var(--muted); }
.plan ul { margin: 8px 0 0; padding-left: 20px; color: var(--muted); }
.sec { font-size: 22px; margin: 40px 0 12px; }
.form { display: grid; gap: 14px; }
.form label { display: grid; gap: 4px; font-weight: 600; font-size: 15px; }
.form input[type=email], .form input[type=text], .form select { font: inherit; padding: 10px 12px; border: 1px solid var(--line); border-radius: 8px; background: var(--bg); color: var(--fg); width: 100%; }
.form .check { display: flex; gap: 10px; align-items: flex-start; font-weight: 400; font-size: 14px; }
.form .check input { margin-top: 6px; width: 18px; height: 18px; flex: none; }
.hp { position: absolute; left: -10000px; width: 1px; height: 1px; overflow: hidden; }
.msg { min-height: 1.5em; margin: 0; font-weight: 600; }
.msg.ok { color: var(--ok); }
.msg.ng { color: var(--ng); }
.note ul { color: var(--muted); font-size: 14px; }
.doc h2 { font-size: 18px; margin-top: 28px; }
.foot { margin-top: 56px; padding: 24px 16px; border-top: 1px solid var(--line); text-align: center; font-size: 13px; color: var(--muted); }
main.wrap.narrow h1 { margin-top: 32px; }