:root {
  --bg: #f6f1ea;
  --bg-2: #fcfaf7;
  --card: #fbf8f4;
  --line: #d8cdbc;
  --line-soft: #e8ded0;
  --text: #183b6b;
  --sub: #52657f;
  --accent: #1d4b82;
  --accent-dark: #163a65;
  --accent-soft: #eef4fb;
  --ad-bg: #f8f4ee;
  --hero-side-bg: #f7f1e9;
  --success-bg: #eef8f1;
  --success-text: #1f6b3a;
  --success-line: #b9dfc4;
  --error-bg: #fff2f2;
  --error-text: #a33a3a;
  --error-line: #efc5c5;
  --shadow: 0 10px 28px rgba(24, 59, 107, 0.07);
  --radius-lg: 24px;
  --radius-md: 18px;
  --radius-sm: 14px;
  --container: 1100px;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "Hiragino Sans", "Yu Gothic UI", sans-serif;
  background:
    radial-gradient(circle at top right, rgba(29, 75, 130, 0.05), transparent 22%),
    radial-gradient(circle at left center, rgba(157, 122, 69, 0.06), transparent 20%),
    var(--bg);
  color: var(--text);
  line-height: 1.75;
}

a {
  color: inherit;
}

img {
  max-width: 100%;
  display: block;
}

.site-shell {
  min-height: 100vh;
}

.container {
  width: min(calc(100% - 32px), var(--container));
  margin: 0 auto;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 30;
  backdrop-filter: blur(12px);
  background: rgba(246, 241, 234, 0.88);
  border-bottom: 1px solid rgba(216, 205, 188, 0.8);
}

.topbar {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 18px;
  flex-wrap: wrap;
  min-height: 78px;
  padding: 10px 0;
}

.brand-wrap {
  text-decoration: none;
}

.brand {
  font-size: 30px;
  font-weight: 800;
  letter-spacing: -0.02em;
  color: var(--text);
}

.brand-sub {
  font-size: 14px;
  color: var(--sub);
  margin-top: 4px;
}

.site-nav {
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
}

.site-nav a {
  text-decoration: none;
  font-weight: 700;
  color: var(--accent);
  padding: 10px 14px;
  border-radius: 999px;
  background: #fff;
  border: 1px solid var(--line);
  transition: 0.18s ease;
}

.site-nav a:hover {
  background: var(--accent-soft);
}

.site-main {
  padding: 28px 0 50px;
}

.section {
  margin: 0 0 28px;
}

.hero {
  display: grid;
  grid-template-columns: minmax(0, 1.15fr) minmax(300px, 0.85fr);
  gap: 24px;
  align-items: stretch;
}

.hero-main,
.hero-side,
.app-card,
.info-card,
.site-side-placeholder,
.site-footer-placeholder,
.site-ad-card {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow);
}

.hero-main,
.hero-side,
.app-card,
.info-card {
  padding: 26px;
}

.hero-side {
  background: linear-gradient(180deg, var(--hero-side-bg) 0%, #fbf8f4 100%);
}

.eyebrow {
  display: inline-block;
  font-size: 13px;
  font-weight: 800;
  color: var(--accent);
  background: var(--accent-soft);
  border-radius: 999px;
  padding: 6px 12px;
  margin-bottom: 14px;
}

.hero h1,
.section-title {
  margin: 0 0 10px;
  font-size: 28px;
  line-height: 1.25;
}

.hero p,
.section-lead,
.info-card p,
.app-card p {
  margin: 0 0 16px;
  color: var(--sub);
  font-size: 17px;
}

.hero-actions,
.card-actions,
.info-links {
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
  margin-top: 20px;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 48px;
  padding: 0 18px;
  border-radius: 999px;
  text-decoration: none;
  font-weight: 800;
  border: 1px solid var(--line);
  cursor: pointer;
  transition: 0.18s ease;
  font: inherit;
}

.btn-primary {
  background: var(--accent);
  color: #fff;
  border-color: var(--accent);
}

.btn-primary:hover {
  background: var(--accent-dark);
  border-color: var(--accent-dark);
}

.btn-secondary {
  background: #fff;
  color: var(--accent);
}

.btn-secondary:hover {
  background: var(--accent-soft);
}

.mini-points,
.hero-side-list,
.app-points {
  margin: 18px 0 0;
  color: var(--sub);
}

.mini-points {
  padding: 0;
  list-style: none;
  font-size: 15px;
}

.mini-points li {
  margin-bottom: 8px;
}

.hero-side-badge {
  display: inline-block;
  padding: 5px 11px;
  border-radius: 999px;
  background: #fff;
  border: 1px solid var(--line);
  font-size: 12px;
  font-weight: 800;
  color: var(--sub);
  margin-bottom: 12px;
}

.hero-side h2 {
  margin: 0 0 10px;
  font-size: 24px;
}

.hero-side-list {
  padding-left: 18px;
}

.hero-side-list li {
  margin-bottom: 8px;
}

.hero-side-text {
  color: var(--sub);
  margin: 16px 0 0;
}

.apps-grid,
.info-grid {
  display: grid;
  gap: 20px;
}

.apps-grid {
  grid-template-columns: repeat(2, 1fr);
}

.info-grid {
  grid-template-columns: 1.05fr 0.95fr;
}

.app-card h2,
.app-card h3,
.info-card h2,
.info-card h3 {
  margin: 0 0 10px;
  font-size: 24px;
}

.app-points {
  padding-left: 18px;
}

.app-points li {
  margin-bottom: 7px;
}

/* 入口広告レイアウト */
.site-main-with-side {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 30%;
  gap: 22px;
  align-items: start;
}

.main-column {
  min-width: 0;
}

.site-side-column {
  min-width: 0;
  align-self: start;
}

.site-side-ad-wrap {
  display: grid;
  gap: 16px;
  position: sticky;
  top: 96px;
}

.site-side-placeholder,
.site-footer-placeholder {
  padding: 18px;
}

.site-side-placeholder__body,
.site-footer-placeholder__body {
  margin-top: 10px;
  color: var(--sub);
  font-weight: 700;
  line-height: 1.7;
}

.site-footer-ads {
  display: grid;
  gap: 18px;
}

.site-footer-ads__large,
.site-footer-ads__medium {
  display: grid;
  gap: 18px;
}

.site-footer-ads__medium {
  grid-template-columns: repeat(2, 1fr);
}

.ad-slot-label {
  display: inline-block;
  font-size: 12px;
  font-weight: 800;
  color: var(--sub);
  background: #fff;
  border: 1px solid var(--line);
  border-radius: 999px;
  padding: 4px 10px;
}

.site-ad-card {
  display: block;
  text-decoration: none;
  color: inherit;
  overflow: hidden;
}

.site-ad-card__media {
  background: #fff;
  border-bottom: 1px solid var(--line-soft);
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
}

.site-ad-card__media img {
  width: 100%;
  height: auto;
  object-fit: contain;
  display: block;
}

.site-ad-card__body {
  padding: 14px 16px 16px;
}

.site-ad-card__title {
  font-size: 20px;
  font-weight: 800;
  line-height: 1.4;
  margin-bottom: 8px;
  color: var(--text);
}

.site-ad-card__text {
  font-size: 14px;
  line-height: 1.7;
  color: var(--sub);
}

.site-ad-placeholder {
  padding: 18px;
  color: var(--sub);
  font-weight: 700;
}

.site-ad-card.is-side .site-ad-card__media,
.site-ad-card.is-footer-50 .site-ad-card__media,
.site-ad-card.is-footer-100 .site-ad-card__media {
  min-height: 0;
  aspect-ratio: auto;
}

.site-ad-card.is-side .site-ad-card__media img,
.site-ad-card.is-footer-50 .site-ad-card__media img,
.site-ad-card.is-footer-100 .site-ad-card__media img {
  width: 100%;
  height: auto;
  object-fit: contain;
}

.site-ad-card.is-footer-100 {
  display: grid;
  grid-template-columns: minmax(280px, 38%) minmax(0, 1fr);
}

.site-ad-card.is-footer-100 .site-ad-card__body {
  padding: 18px 20px;
}

/* フォーム */
.contact-form {
  margin-top: 18px;
}

.form-group {
  margin-bottom: 18px;
}

label {
  display: block;
  margin-bottom: 8px;
  font-weight: 700;
  color: var(--text);
}

input,
select,
textarea {
  width: 100%;
  box-sizing: border-box;
  border: 1px solid #cdbfaa;
  border-radius: 14px;
  padding: 12px 14px;
  font-size: 16px;
  background: #fff;
  color: var(--text);
  font: inherit;
}

textarea {
  min-height: 180px;
  resize: vertical;
}

.form-status {
  display: none;
  margin-bottom: 18px;
  padding: 12px 14px;
  border-radius: 14px;
  font-size: 15px;
  font-weight: 700;
}

.form-status.is-success {
  display: block;
  background: var(--success-bg);
  color: var(--success-text);
  border: 1px solid var(--success-line);
}

.form-status.is-error {
  display: block;
  background: var(--error-bg);
  color: var(--error-text);
  border: 1px solid var(--error-line);
}

/* フッター */
.site-footer {
  padding: 30px 0 60px;
  color: var(--sub);
  font-size: 14px;
}

.footer-links {
  display: flex;
  gap: 14px;
  flex-wrap: wrap;
  margin-bottom: 10px;
}

.footer-links a {
  color: var(--accent);
  text-decoration: none;
  font-weight: 700;
}

@media (max-width: 980px) {
  .hero,
  .apps-grid,
  .info-grid,
  .site-main-with-side,
  .site-footer-ads__medium {
    grid-template-columns: 1fr;
  }

  .site-side-column {
    display: none;
  }

  .site-ad-card.is-footer-100 {
    grid-template-columns: 1fr;
  }

  .site-ad-card.is-footer-100 .site-ad-card__media {
    border-right: none;
    border-bottom: 1px solid var(--line-soft);
    min-height: 0;
    aspect-ratio: auto;
  }
}

@media (max-width: 720px) {
  .site-header {
    position: static;
  }

  .brand {
    font-size: 26px;
  }

  .hero-main,
  .hero-side,
  .app-card,
  .info-card,
  .site-side-placeholder,
  .site-footer-placeholder {
    padding: 20px;
  }

  .section-title {
    font-size: 24px;
  }

  .hero p,
  .section-lead,
  .info-card p,
  .app-card p {
    font-size: 16px;
  }

  .site-ad-card__body {
    padding: 14px;
  }
}