:root {
  --bg: #f7f8fc;
  --surface: #ffffff;
  --surface-soft: #f0eeff;
  --text: #171a2b;
  --muted: #687086;
  --primary: #6c63ff;
  --primary-dark: #5851e8;
  --border: #e7e9f0;
  --success: #29c96b;
  --danger: #d94a4a;
  --shadow: 0 14px 40px rgba(28, 32, 57, 0.08);
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "Noto Sans JP",
    "Hiragino Sans", "Yu Gothic UI", sans-serif;
  line-height: 1.8;
}

a { color: var(--primary-dark); }

.site-header {
  position: sticky;
  top: 0;
  z-index: 10;
  background: rgba(247, 248, 252, 0.88);
  border-bottom: 1px solid rgba(231, 233, 240, 0.9);
  backdrop-filter: blur(14px);
}

.header-inner {
  width: min(900px, calc(100% - 32px));
  margin: 0 auto;
  min-height: 68px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  color: var(--text);
  text-decoration: none;
  font-weight: 800;
  font-size: 20px;
}

.brand img {
  width: 36px;
  height: 36px;
  border-radius: 9px;
  box-shadow: 0 4px 12px rgba(28, 32, 57, 0.12);
}

.nav {
  display: flex;
  gap: 16px;
  font-size: 14px;
  font-weight: 700;
}

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

main {
  width: min(900px, calc(100% - 32px));
  margin: 0 auto;
  padding: 52px 0 80px;
}

.hero {
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 28px;
  align-items: center;
  margin-bottom: 34px;
}

.hero h1 {
  margin: 0 0 8px;
  font-size: clamp(30px, 5vw, 46px);
  line-height: 1.25;
}

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

.hero img {
  width: 108px;
  height: 108px;
  border-radius: 26px;
  box-shadow: var(--shadow);
}

.notice {
  margin: 0 0 28px;
  padding: 16px 18px;
  background: #fff8e8;
  border: 1px solid #f4d997;
  border-radius: 14px;
  color: #6e5113;
}

.card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 20px;
  padding: clamp(22px, 4vw, 36px);
  box-shadow: var(--shadow);
  margin-bottom: 20px;
}

.card h2 {
  margin: 0 0 14px;
  font-size: 23px;
  line-height: 1.4;
}

.card h3 {
  margin: 26px 0 8px;
  font-size: 17px;
}

.card p, .card li { color: #33394c; }

.card ul, .card ol { padding-left: 1.35em; }

.meta {
  display: flex;
  flex-wrap: wrap;
  gap: 10px 18px;
  margin-top: 16px;
  color: var(--muted);
  font-size: 13px;
}

.callout {
  background: var(--surface-soft);
  border: 1px solid #dcd8ff;
  border-radius: 14px;
  padding: 16px 18px;
}

.faq {
  border-top: 1px solid var(--border);
  padding: 20px 0;
}

.faq:first-of-type { border-top: none; }
.faq h3 { margin: 0 0 8px; }
.faq p { margin: 0; }

.contact-box {
  background: #f5f6fb;
  border: 1px dashed #b9bfd0;
  border-radius: 14px;
  padding: 18px;
}

.placeholder {
  display: inline-block;
  background: #fff0f0;
  color: #a72e2e;
  border-radius: 6px;
  padding: 1px 7px;
  font-weight: 800;
}

footer {
  width: min(900px, calc(100% - 32px));
  margin: 0 auto;
  padding: 28px 0 46px;
  border-top: 1px solid var(--border);
  color: var(--muted);
  font-size: 13px;
}

@media (max-width: 640px) {
  .nav { gap: 10px; font-size: 12px; }
  .hero { grid-template-columns: 1fr; }
  .hero img { width: 88px; height: 88px; }
  main { padding-top: 34px; }
  .card { border-radius: 16px; padding: 20px; }
}