:root {
  --bg: #F4F8F9;
  --surface: #E0EEF0;
  --text: #14343A;
  --sub: #5D7A80;
  --main: #23818A;
  --on-main: #FFFFFF;
  --line: #C5DADD;
  --night: #0C1D21;
  --night-text: #E1F1F3;
  --night-accent: #6FD3CF;
}
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #0C1D21;
    --surface: #163036;
    --text: #E1F1F3;
    --sub: #8AAEB4;
    --main: #6FD3CF;
    --on-main: #0C1D21;
    --line: #2A4A51;
    --night: #08161A;
  }
}
* { box-sizing: border-box; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: -apple-system, BlinkMacSystemFont, "Hiragino Sans", "Noto Sans JP", sans-serif;
  line-height: 1.8;
  -webkit-text-size-adjust: 100%;
}
a { color: var(--main); }
img { max-width: 100%; }

/* ---- 共通ヘッダー・フッター ---- */
.bar { max-width: 960px; margin: 0 auto; padding: 14px 16px; display: flex; align-items: center; gap: 10px; }
.brand { display: flex; align-items: center; gap: 10px; color: var(--text); text-decoration: none; font-weight: 700; font-size: 17px; }
.brand img { width: 36px; height: 36px; border-radius: 8px; }
.bar nav { margin-left: auto; display: flex; gap: 18px; font-size: 14px; }
.bar nav a { color: var(--sub); text-decoration: none; }
.bar nav a:hover { color: var(--main); }

.foot { border-top: 1px solid var(--line); margin-top: 56px; }
.foot-in { max-width: 960px; margin: 0 auto; padding: 24px 16px 40px; font-size: 13px; color: var(--sub); }
.foot-links { display: flex; flex-wrap: wrap; gap: 8px 20px; margin-bottom: 12px; }
.foot-links a { color: var(--sub); }

/* ---- 文章ページ（規約・使い方など） ---- */
main.doc { max-width: 680px; margin: 0 auto; padding: 16px 16px 0; }
.doc h1 { font-size: 24px; margin: 8px 0 16px; }
.doc h2 { font-size: 17px; margin: 32px 0 8px; }
.doc p, .doc li { font-size: 15px; }
.doc ul { padding-left: 1.2em; }
.doc .shot { display: block; width: 220px; margin: 12px auto 4px; border-radius: 22px; border: 1px solid var(--line); }
.card { background: var(--surface); border-radius: 14px; padding: 16px 20px; margin: 16px 0; }
.meta { color: var(--sub); font-size: 13px; margin-top: 32px; }
.toc { display: flex; flex-wrap: wrap; gap: 8px; margin: 0 0 8px; padding: 0; list-style: none; }
.toc a { display: inline-block; background: var(--surface); border-radius: 999px; padding: 4px 14px; font-size: 13px; text-decoration: none; color: var(--text); }

/* ---- LP ---- */
.wrap { max-width: 960px; margin: 0 auto; padding: 0 16px; }
.hero { padding: 32px 0 48px; }
.hero .cols { display: grid; gap: 32px; align-items: center; }
.eyebrow { color: var(--main); font-weight: 700; font-size: 14px; margin: 0 0 8px; }
.hero h1 { font-size: 34px; line-height: 1.35; margin: 0 0 16px; letter-spacing: 0.01em; }
.lead { font-size: 16px; color: var(--sub); margin: 0 0 24px; }
.soon { display: inline-block; background: var(--main); color: var(--on-main); font-weight: 700; border-radius: 12px; padding: 12px 22px; font-size: 15px; }
.small { font-size: 13px; color: var(--sub); margin-top: 10px; }
.phones { display: flex; justify-content: center; gap: 16px; }
.phone { width: 46%; max-width: 230px; border-radius: 26px; border: 1px solid var(--line); box-shadow: 0 12px 32px rgba(12, 29, 33, 0.14); }
.phone.up { margin-top: -24px; }

.sec { padding: 48px 0; }
.sec h2 { font-size: 24px; line-height: 1.45; margin: 0 0 24px; text-align: center; }
.sec .sublead { text-align: center; color: var(--sub); margin: -12px 0 28px; }
.g3 { display: grid; gap: 16px; }
.tile { background: var(--surface); border-radius: 16px; padding: 20px; }
.tile b { display: block; font-size: 16px; margin-bottom: 4px; }
.tile p { margin: 0; font-size: 14px; color: var(--sub); }

.night { background: var(--night); color: var(--night-text); }
.night h2 { color: var(--night-text); }
.night .accent { color: var(--night-accent); }

.steps { display: grid; gap: 28px; }
.step { text-align: center; }
.step img { width: 200px; border-radius: 22px; border: 1px solid var(--line); }
.step .no { display: inline-flex; width: 28px; height: 28px; align-items: center; justify-content: center; border-radius: 50%; background: var(--main); color: var(--on-main); font-weight: 700; font-size: 14px; margin: 14px 0 6px; }
.step b { display: block; font-size: 16px; }
.step p { margin: 4px auto 0; max-width: 260px; font-size: 14px; color: var(--sub); }

.feature { display: grid; gap: 24px; align-items: center; margin-bottom: 40px; }
.feature img { width: 220px; justify-self: center; border-radius: 22px; border: 1px solid var(--line); }
.feature h3 { font-size: 19px; margin: 0 0 8px; }
.feature p { margin: 0 0 8px; font-size: 15px; }
.note { font-size: 13px; color: var(--sub); }

.promise { max-width: 680px; margin: 0 auto; }
.promise li { margin-bottom: 6px; }

.faq { max-width: 680px; margin: 0 auto; }
.faq details { background: var(--surface); border-radius: 14px; padding: 14px 18px; margin-bottom: 10px; }
.faq summary { font-weight: 700; cursor: pointer; }
.faq details p { margin: 8px 0 0; font-size: 14px; }

@media (min-width: 760px) {
  .hero .cols { grid-template-columns: 1.1fr 1fr; }
  .hero h1 { font-size: 42px; }
  .g3 { grid-template-columns: repeat(3, 1fr); }
  .g4 { grid-template-columns: repeat(2, 1fr); }
  .steps { grid-template-columns: repeat(3, 1fr); }
  .feature { grid-template-columns: 1fr 260px; }
  .feature.rev { grid-template-columns: 260px 1fr; }
  .feature.rev img { order: -1; }
}
@media (max-width: 420px) {
  .bar nav { gap: 12px; font-size: 13px; }
  .hero h1 { font-size: 30px; }
}