:root {
  color-scheme: light;
  --blue: #2563eb;
  --blue-dark: #1d4ed8;
  --blue-soft: #e8efff;
  --ink: #1b2233;
  --muted: #5f6878;
  --line: #e3e7ef;
  --bg: #ffffff;
  --tint: #f5f7fb;
  --green: #15803d;
  --purple: #7c3aed;
  --radius: 18px;
  --shadow: 0 24px 60px rgba(20, 40, 90, 0.16);
  --font: "BIZ UDPGothic", "Yu Gothic UI", "Hiragino Sans", "Hiragino Kaku Gothic ProN", Meiryo, sans-serif;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; scroll-padding-top: 76px; }
body { margin: 0; background: var(--bg); color: var(--ink); font-family: var(--font); line-height: 1.75; -webkit-font-smoothing: antialiased; }
img { max-width: 100%; height: auto; display: block; }
a { color: var(--blue); }
h1, h2, h3 { line-height: 1.3; margin: 0; word-break: auto-phrase; }
p { margin: 0; }

.wrap { max-width: 1160px; margin: 0 auto; padding: 0 24px; }
.wrap--narrow { max-width: 820px; }
.accent { color: var(--blue); }

/* ボタン */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  border-radius: 999px;
  font-weight: 700;
  text-decoration: none;
  transition: transform 0.15s ease, box-shadow 0.15s ease, background 0.15s ease;
}
.btn--primary { background: var(--blue); color: #fff; box-shadow: 0 10px 24px rgba(37, 99, 235, 0.3); }
.btn--primary:hover { background: var(--blue-dark); transform: translateY(-1px); }
.btn--ghost { background: #fff; color: var(--ink); box-shadow: 0 0 0 1px var(--line), 0 8px 20px rgba(20, 40, 90, 0.08); }
.btn--ghost:hover { transform: translateY(-1px); }
.btn--sm { padding: 8px 20px; font-size: 15px; }
.btn--lg { padding: 16px 34px; font-size: 18px; }
.play { width: 0; height: 0; border-left: 12px solid var(--blue); border-top: 8px solid transparent; border-bottom: 8px solid transparent; }

/* ヘッダー */
.site-header {
  position: sticky;
  top: 0;
  z-index: 10;
  background: rgba(255, 255, 255, 0.86);
  backdrop-filter: saturate(1.4) blur(12px);
  border-bottom: 1px solid var(--line);
}
.site-header__inner { display: flex; align-items: center; gap: 24px; height: 64px; }
.logo { display: flex; align-items: center; gap: 10px; color: var(--ink); font-weight: 700; font-size: 18px; text-decoration: none; }
.logo img { border-radius: 9px; }
.site-nav { display: flex; gap: 22px; margin-left: auto; }
.site-nav a { color: var(--muted); text-decoration: none; font-size: 15px; font-weight: 700; }
.site-nav a:hover { color: var(--ink); }

/* ヒーロー */
.hero {
  position: relative;
  overflow: hidden;
  padding: 72px 0 88px;
  background:
    radial-gradient(600px 400px at 10% 0%, #dbe7ff 0%, transparent 70%),
    radial-gradient(600px 420px at 100% 100%, #dcf3e5 0%, transparent 70%),
    linear-gradient(135deg, #f3f6ff 0%, #ffffff 50%, #f1f7f3 100%);
}
.hero__inner { display: grid; grid-template-columns: minmax(0, 1fr) minmax(0, 1.1fr); gap: 56px; align-items: center; }
.eyebrow { display: inline-block; padding: 6px 16px; border-radius: 999px; background: var(--blue-soft); color: var(--blue); font-weight: 700; font-size: 14px; }
.hero h1 { margin-top: 20px; font-size: clamp(28px, 3.6vw, 48px); letter-spacing: 0.01em; }
.nobr { white-space: nowrap; }
.lead { margin-top: 22px; font-size: 18px; color: #334155; word-break: auto-phrase; }
.lead strong { color: var(--ink); }
.hero__actions { display: flex; flex-wrap: wrap; gap: 14px; margin-top: 32px; }
.price-note { margin-top: 14px; font-weight: 700; color: var(--ink); }
.hero__visual { position: relative; padding-bottom: 40px; }

.shot { margin: 0; }
.shot--window { border-radius: 14px; overflow: hidden; background: #fff; box-shadow: var(--shadow), 0 0 0 1px rgba(20, 40, 90, 0.06); }
.shot__bar { display: flex; gap: 7px; padding: 11px 14px; background: #eef1f6; }
.shot__bar i { width: 11px; height: 11px; border-radius: 50%; background: #f26b5f; }
.shot__bar i:nth-child(2) { background: #f6be4f; }
.shot__bar i:nth-child(3) { background: #61c454; }
.shot--window img { aspect-ratio: 1600 / 1050; object-fit: cover; object-position: top; width: 100%; }
.shot--phone {
  position: absolute;
  right: -12px;
  bottom: 0;
  width: 28%;
  padding: 7px;
  border-radius: 30px;
  background: #11141b;
  box-shadow: 0 24px 50px rgba(20, 40, 90, 0.3);
}
.shot--phone img { border-radius: 24px; aspect-ratio: 600 / 1100; object-fit: cover; object-position: top; }

/* 数字 */
.numbers { background: var(--ink); color: #fff; padding: 34px 0; }
.numbers__inner { display: flex; flex-wrap: wrap; align-items: center; justify-content: center; gap: 12px 32px; }
.numbers__item { display: flex; flex-direction: column; align-items: center; }
.numbers__label { font-size: 15px; color: #c3cad6; font-weight: 700; }
.numbers__value { font-size: 44px; font-weight: 700; line-height: 1.2; font-variant-numeric: tabular-nums; }
.numbers__value.accent { color: #7aa7ff; }
.numbers__arrow { font-size: 32px; color: #8b95a7; }
.numbers__gain { padding: 8px 20px; border-radius: 999px; background: #16a34a; font-size: 26px; font-weight: 700; }
.numbers__note { flex-basis: 100%; text-align: center; font-size: 13px; color: #9aa3b2; }

/* セクション */
.section { padding: 88px 0; }
.section--tint { background: var(--tint); }
.section__title { text-align: center; font-size: clamp(26px, 3.2vw, 36px); margin-bottom: 44px; }
.section__title--left { text-align: left; margin-bottom: 20px; }

.video { border-radius: var(--radius); overflow: hidden; box-shadow: var(--shadow); background: #000; }
.video video { display: block; width: 100%; height: auto; aspect-ratio: 16 / 9; }
.caption { margin-top: 14px; text-align: center; color: var(--muted); font-size: 14px; }

/* 使い方 */
.steps { list-style: none; margin: 0; padding: 0; display: grid; gap: 56px; }
.step { display: grid; grid-template-columns: minmax(0, 1.15fr) minmax(0, 1fr); gap: 48px; align-items: center; }
.step:nth-child(even) .step__shot { order: 2; }
.step__shot { margin: 0; border-radius: 14px; overflow: hidden; background: #fff; box-shadow: var(--shadow), 0 0 0 1px rgba(20, 40, 90, 0.06); }
.step__shot img { aspect-ratio: 1600 / 980; object-fit: cover; object-position: top; width: 100%; }
.step__num { display: inline-block; padding: 4px 14px; border-radius: 999px; background: var(--blue-soft); color: var(--blue); font-weight: 700; font-size: 14px; }
.step h3 { margin: 12px 0 14px; font-size: 28px; }
.step p { color: #334155; }

/* できること */
.features { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 22px; }
.feature { padding: 28px; border-radius: var(--radius); background: #fff; border: 1px solid var(--line); }
.feature__icon { display: grid; place-items: center; width: 48px; height: 48px; border-radius: 14px; background: var(--blue-soft); color: var(--blue); font-weight: 700; font-size: 22px; }
.feature__icon--ai { background: #f1ebff; color: var(--purple); font-size: 18px; }
.feature h3 { margin: 16px 0 10px; font-size: 20px; }
.feature p { color: var(--muted); font-size: 15px; }
.wide-shot { margin: 56px 0 0; }
.wide-shot img { border-radius: 14px; box-shadow: var(--shadow), 0 0 0 1px rgba(20, 40, 90, 0.06); aspect-ratio: 1600 / 900; object-fit: cover; object-position: 50% 80%; width: 100%; }
.wide-shot figcaption { margin-top: 14px; text-align: center; color: var(--muted); font-size: 14px; }

/* スマホ */
.phone-section { display: grid; grid-template-columns: minmax(0, 0.9fr) minmax(0, 1.1fr); gap: 48px; align-items: center; }
.phone-section__text > p { color: #334155; }
.checks { list-style: none; margin: 22px 0 0; padding: 0; display: grid; gap: 10px; }
.checks li { position: relative; padding-left: 34px; font-weight: 700; }
.checks li::before { content: "✓"; position: absolute; left: 0; top: 2px; display: grid; place-items: center; width: 24px; height: 24px; border-radius: 50%; background: var(--green); color: #fff; font-size: 14px; }
.phones { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 18px; }
.phones img { padding: 6px; border-radius: 26px; background: #11141b; box-shadow: 0 20px 40px rgba(20, 40, 90, 0.22); }
.phones img:nth-child(2) { transform: translateY(-24px); }

/* 動作環境 */
.spec { margin: 0 auto; max-width: 860px; border-top: 1px solid var(--line); }
.spec div { display: grid; grid-template-columns: 200px 1fr; gap: 20px; padding: 18px 4px; border-bottom: 1px solid var(--line); }
.spec dt { font-weight: 700; }
.spec dd { margin: 0; color: #334155; }

/* よくある質問 */
.faq { background: #fff; border: 1px solid var(--line); border-radius: 14px; margin-bottom: 12px; }
.faq summary { cursor: pointer; list-style: none; padding: 18px 54px 18px 22px; font-weight: 700; position: relative; }
.faq summary::-webkit-details-marker { display: none; }
.faq summary::after { content: "+"; position: absolute; right: 22px; top: 50%; transform: translateY(-50%); font-size: 24px; color: var(--blue); }
.faq[open] summary::after { content: "−"; }
.faq p { padding: 0 22px 20px; color: #334155; }

/* ダウンロード */
.cta { padding: 96px 0; text-align: center; background: linear-gradient(135deg, #eef3ff 0%, #ffffff 55%, #eef8f2 100%); }
.cta__inner { display: flex; flex-direction: column; align-items: center; gap: 18px; }
.cta__inner img { border-radius: 22px; box-shadow: 0 20px 44px rgba(37, 99, 235, 0.3); }
.cta h2 { font-size: clamp(30px, 4vw, 46px); }
.cta p { color: #334155; }
.cta__small { font-size: 13px; color: var(--muted) !important; }

/* フッター */
.site-footer { padding: 44px 0 56px; background: var(--ink); color: #c3cad6; font-size: 13px; }
.site-footer__brand { display: flex; align-items: center; gap: 8px; color: #fff; font-weight: 700; font-size: 16px; }
.site-footer__brand img { border-radius: 6px; }
.notes { margin: 18px 0; padding-left: 1.2em; display: grid; gap: 4px; }
.site-footer__links a { color: #fff; }
.copyright { margin-top: 10px; color: #8b95a7; }

/* スマホ・タブレット */
@media (max-width: 960px) {
  .hero__inner, .phone-section { grid-template-columns: 1fr; }
  .hero { padding: 48px 0 64px; }
  .features { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .step { grid-template-columns: 1fr; gap: 24px; }
  .step:nth-child(even) .step__shot { order: 0; }
}
@media (max-width: 640px) {
  .wrap { padding: 0 16px; }
  .site-nav { display: none; }
  .site-header__inner { justify-content: space-between; }
  .lead { font-size: 16px; }
  .btn--lg { padding: 14px 26px; font-size: 16px; }
  .hero__actions .btn { flex: 1 1 100%; }
  .section { padding: 64px 0; }
  .section__title { margin-bottom: 32px; }
  .features { grid-template-columns: 1fr; }
  .numbers__value { font-size: 34px; }
  .numbers__arrow { transform: rotate(90deg); }
  .numbers__inner { flex-direction: column; }
  .spec div { grid-template-columns: 1fr; gap: 4px; }
  .phones { gap: 10px; }
  .phones img { padding: 4px; border-radius: 16px; }
  .shot--phone { right: -4px; width: 32%; border-radius: 20px; padding: 5px; }
  .shot--phone img { border-radius: 16px; }
}
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .btn { transition: none; }
}