:root {
  --bg: #f5f7fb;
  --surface: #ffffff;
  --text: #1a2233;
  --text-muted: #5a6478;
  --primary: #3a7bd5;
  --primary-dark: #2c5fa8;
  --border: #e3e8f0;
  --radius: 12px;
  --shadow: 0 4px 18px rgba(20, 40, 80, 0.06);
}

* { box-sizing: border-box; }

html, body {
  margin: 0;
  padding: 0;
  background: linear-gradient(180deg, #e3eefc 0%, var(--bg) 320px);
  color: var(--text);
  font-family: -apple-system, "Segoe UI", "Hiragino Sans", "Noto Sans JP", sans-serif;
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
}

.container {
  max-width: 820px;
  margin: 0 auto;
  padding: 0 20px;
}

.visually-hidden {
  position: absolute;
  width: 1px; height: 1px;
  margin: -1px; padding: 0;
  overflow: hidden; clip: rect(0 0 0 0);
  white-space: nowrap; border: 0;
}

.site-header {
  background: rgba(255,255,255,0.85);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--border);
  position: sticky; top: 0; z-index: 10;
}

.header-inner {
  display: flex; align-items: center; justify-content: space-between;
  padding: 14px 20px;
}

.brand {
  display: flex; align-items: center; gap: 10px;
  text-decoration: none; color: var(--text); font-weight: 700;
}
.brand-icon { font-size: 1.6rem; }
.brand-name { font-size: 1.15rem; letter-spacing: 0.02em; }

.lang-switch {
  display: flex; align-items: center; gap: 6px;
  font-size: 0.95rem;
}
.lang-switch select {
  border: 1px solid var(--border);
  background: #fff;
  padding: 6px 10px;
  border-radius: 8px;
  font-size: 0.92rem;
  color: var(--text);
  cursor: pointer;
}

.hero {
  text-align: center;
  padding: 56px 0 32px;
}
.hero h1 {
  margin: 0 0 12px;
  font-size: clamp(1.8rem, 4vw, 2.4rem);
  letter-spacing: 0.01em;
}
.hero-sub {
  margin: 0;
  color: var(--text-muted);
  font-size: 1.05rem;
}
.hero-meta {
  margin-top: 16px;
  font-size: 0.9rem;
  color: var(--text-muted);
}

.policy {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 36px 32px;
  box-shadow: var(--shadow);
  margin-bottom: 48px;
}
.policy section + section {
  margin-top: 28px;
}
.policy h2 {
  font-size: 1.15rem;
  color: var(--primary-dark);
  margin: 0 0 10px;
}
.policy p, .policy li { color: var(--text); }
.policy ul { padding-left: 22px; margin: 8px 0; }
.policy a { color: var(--primary); text-decoration: none; border-bottom: 1px solid transparent; }
.policy a:hover { border-bottom-color: var(--primary); }

.site-footer {
  border-top: 1px solid var(--border);
  background: #fff;
  padding: 18px 0;
  text-align: center;
  color: var(--text-muted);
  font-size: 0.88rem;
}

@media (max-width: 600px) {
  .policy { padding: 24px 18px; }
  .hero { padding: 40px 0 24px; }
}