:root { --bg:#f7f8f5; --fg:#1d2a22; --muted:#5d6b62; --accent:#22a15a; --card:#ffffff; --line:#dfe5df; }
@media (prefers-color-scheme: dark) { :root { --bg:#111713; --fg:#e8efe9; --muted:#9aa89f; --accent:#4cc785; --card:#1a231d; --line:#2a352d; } }
* { box-sizing: border-box; }
body { margin:0; background:var(--bg); color:var(--fg); font:16px/1.8 -apple-system,BlinkMacSystemFont,"Hiragino Sans","Noto Sans JP",sans-serif; }
main { max-width: 720px; margin: 0 auto; padding: 32px 20px 64px; }
h1 { font-size: 1.7rem; margin: 0 0 8px; }
h2 { font-size: 1.15rem; margin: 32px 0 6px; padding-bottom: 4px; border-bottom: 1px solid var(--line); }
p, li { color: var(--fg); } .muted { color: var(--muted); font-size: .9rem; }
a { color: var(--accent); } ul { padding-left: 1.3em; }
.card { background: var(--card); border: 1px solid var(--line); border-radius: 14px; padding: 18px 20px; margin: 18px 0; }
.code { font: 700 2.2rem/1.2 ui-monospace,Menlo,monospace; letter-spacing: .25em; text-align:center; margin: 8px 0; }
.btn { display:inline-block; background:var(--accent); color:#fff; padding:10px 18px; border-radius:999px; text-decoration:none; font-weight:600; margin:6px 6px 0 0; }
nav a { margin-right: 14px; font-size: .9rem; }
.lp .hero { text-align:center; padding: 12px 0 8px; }
.lp .app-icon { border-radius: 22px; box-shadow: 0 4px 16px rgba(0,0,0,.15); }
.lp .lead { font-size: 1.35rem; font-weight: 700; line-height: 1.5; margin: 8px 0 12px; }
.lp .stores { margin-top: 16px; }
.btn.off { background: var(--card); color: var(--muted); border: 1px solid var(--line); cursor: default; }
.feature { display:flex; gap: 24px; align-items:center; margin: 28px 0; }
.feature.rev { flex-direction: row-reverse; }
.feature img { width: 220px; max-width: 42%; height:auto; border-radius: 18px; border: 1px solid var(--line); box-shadow: 0 6px 20px rgba(0,0,0,.12); }
.feature h2 { margin-top: 0; }
@media (max-width: 560px) { .feature, .feature.rev { flex-direction: column; } .feature img { max-width: 70%; width: 240px; } }
/* よくある質問: 質問を一覧で見て、押すと答えが開く。 */
.contact { padding: 12px 20px; margin: 12px 0; } .contact p { margin: 0; }
.faq-nav { display: flex; flex-wrap: wrap; gap: 8px; margin: 16px 0 8px; }
.faq-nav a { margin: 0; padding: 6px 12px; background: var(--card); border: 1px solid var(--line); border-radius: 999px; text-decoration: none; font-size: .9rem; }
.faq-cat { font-size: .95rem; color: var(--muted); margin: 24px 0 8px; scroll-margin-top: 12px; }
.faq { background: var(--card); border: 1px solid var(--line); border-radius: 12px; margin: 8px 0; }
.faq summary { list-style: none; cursor: pointer; display: flex; align-items: center; gap: 12px; min-height: 48px; padding: 10px 16px; font-weight: 600; line-height: 1.5; }
.faq summary::-webkit-details-marker { display: none; }
.faq summary::after { content: ""; flex: none; margin-left: auto; width: 8px; height: 8px; border-right: 2px solid var(--muted); border-bottom: 2px solid var(--muted); transform: rotate(45deg); transition: transform .15s; }
.faq[open] summary::after { transform: rotate(-135deg); }
.faq summary:focus-visible { outline: 2px solid var(--accent); outline-offset: 2px; border-radius: 12px; }
.faq-a { padding: 0 16px 14px; line-height: 1.75; }
.faq-a p { margin: 0 0 8px; } .faq-a p:last-child { margin-bottom: 0; }