:root {
  --bg: #f7f8fa;
  --surface: #ffffff;
  --surface-soft: #f1f5f9;
  --text: #172033;
  --muted: #5b6678;
  --line: #d9e0ea;
  --accent: #2563eb;
  --accent-dark: #1d4ed8;
  --warning-bg: #fff7e6;
  --warning-line: #ead39b;
  --radius: 8px;
  --shadow: 0 10px 28px rgba(18, 28, 45, 0.07);
}

* {
  box-sizing: border-box;
}

html {
  -webkit-text-size-adjust: 100%;
}

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "Hiragino Kaku Gothic ProN",
    "Hiragino Sans", "Noto Sans JP", "Yu Gothic", Meiryo, sans-serif;
  font-size: 16px;
  line-height: 1.75;
}

a {
  color: var(--accent);
  text-decoration-thickness: 0.08em;
  text-underline-offset: 0.18em;
}

a:hover {
  color: var(--accent-dark);
}

.container {
  width: min(100% - 32px, 960px);
  margin: 0 auto;
}

.site-header {
  background: rgba(255, 255, 255, 0.94);
  border-bottom: 1px solid var(--line);
}

.header-inner,
.footer-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 18px;
}

.header-inner {
  min-height: 64px;
}

.brand {
  color: var(--text);
  font-size: 1.05rem;
  font-weight: 700;
  text-decoration: none;
}

.nav {
  display: flex;
  flex-wrap: wrap;
  justify-content: flex-end;
  gap: 14px;
  font-size: 0.94rem;
}

.nav a {
  color: var(--muted);
  text-decoration: none;
}

.nav a:hover {
  color: var(--text);
}

main {
  padding: 44px 0 64px;
}

.hero {
  padding: 34px 0 38px;
  border-bottom: 1px solid var(--line);
  margin-bottom: 34px;
}

.eyebrow,
.tag {
  margin: 0 0 8px;
  color: var(--accent);
  font-size: 0.78rem;
  font-weight: 700;
  letter-spacing: 0.04em;
  text-transform: uppercase;
}

h1,
h2,
h3 {
  margin: 0;
  line-height: 1.35;
}

h1 {
  font-size: clamp(2rem, 7vw, 3.6rem);
  margin-bottom: 14px;
}

h2 {
  font-size: 1.35rem;
}

h3 {
  font-size: 1.16rem;
  margin-bottom: 8px;
}

p {
  margin: 0 0 14px;
}

.lead,
.lead-ja {
  max-width: 720px;
  color: var(--muted);
  font-size: 1.05rem;
}

.section-heading {
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  gap: 16px;
  margin-bottom: 16px;
}

.section-heading p {
  color: var(--muted);
  margin: 0;
}

.app-card,
.content-panel,
.notice {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
}

.app-card {
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 24px;
  padding: 24px;
}

.card-actions {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 10px;
  min-width: 190px;
}

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 42px;
  padding: 8px 14px;
  border-radius: 6px;
  background: var(--accent);
  color: #ffffff;
  font-weight: 700;
  text-decoration: none;
}

.button:hover {
  background: var(--accent-dark);
  color: #ffffff;
}

.notice {
  margin-top: 28px;
  padding: 20px;
  background: var(--warning-bg);
  border-color: var(--warning-line);
  box-shadow: none;
}

.content-panel {
  padding: 24px;
  margin-bottom: 22px;
}

.content-panel h2,
.content-panel h3 {
  margin-top: 22px;
  margin-bottom: 10px;
}

.content-panel h2:first-child,
.content-panel h3:first-child {
  margin-top: 0;
}

.two-column {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 20px;
}

.policy-list {
  margin: 0;
  padding-left: 1.35em;
}

.policy-list li {
  margin-bottom: 12px;
}

.meta-list {
  display: grid;
  grid-template-columns: max-content 1fr;
  gap: 8px 16px;
  margin: 0;
}

.meta-list dt {
  color: var(--muted);
  font-weight: 700;
}

.meta-list dd {
  margin: 0;
}

.contact-box {
  padding: 16px;
  background: var(--surface-soft);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  word-break: break-word;
}

.site-footer {
  border-top: 1px solid var(--line);
  background: var(--surface);
  color: var(--muted);
  font-size: 0.9rem;
}

.footer-inner {
  min-height: 76px;
}

.footer-inner p {
  margin: 0;
}

@media (max-width: 720px) {
  .container {
    width: min(100% - 24px, 960px);
  }

  .header-inner,
  .footer-inner,
  .section-heading {
    align-items: flex-start;
    flex-direction: column;
  }

  .header-inner {
    padding: 14px 0;
  }

  main {
    padding-top: 28px;
  }

  .hero {
    padding-top: 18px;
  }

  .app-card,
  .two-column {
    grid-template-columns: 1fr;
  }

  .card-actions {
    min-width: 0;
  }

  .meta-list {
    grid-template-columns: 1fr;
    gap: 2px;
  }
}