/* 下層ページ共通（/ai/・/privacy.php） */
.sub-header {
  position: sticky; top: 0; z-index: 50;
  display: flex; align-items: center; justify-content: space-between; gap: 20px;
  height: 68px; padding: 0 var(--gutter);
  background: rgba(242,242,242,.88);
  backdrop-filter: blur(12px); -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid rgba(26,26,26,.06);
}
.sub-logo img { height: 44px; width: auto; }
.sub-nav { display: flex; align-items: center; gap: 24px; font-size: 13px; letter-spacing: .06em; }
.sub-nav a { transition: color .2s; }
.sub-nav a:hover { color: var(--blue); }
.sub-tel { font-family: var(--font-en); font-weight: 500; padding: 8px 16px; border: 1px solid var(--fg); border-radius: 999px; }
.sub-tel:hover { background: var(--fg); color: var(--bg) !important; }
@media (max-width: 720px) {
  .sub-nav a:not(.sub-tel) { display: none; }
  .sub-tel { font-size: 12px; padding: 6px 12px; }
}

.sub-main { padding: clamp(56px, 8vw, 104px) var(--gutter) clamp(80px, 10vw, 140px); }
.sub-label { font-family: var(--font-en); font-size: 11px; font-weight: 600; letter-spacing: .16em; color: var(--blue); }
.sub-title { font-size: clamp(26px, 3.4vw, 40px); font-weight: 500; line-height: 1.4; margin: 8px 0 32px; letter-spacing: .04em; }

/* プライバシーポリシー */
.policy { max-width: 800px; margin: 0 auto; }
.policy-lead { font-size: 15px; line-height: 2.1; }
.policy h2 { font-size: 17px; font-weight: 500; margin: 44px 0 12px; padding-left: 14px; border-left: 3px solid var(--blue); line-height: 1.6; }
.policy p, .policy li { font-size: 14px; line-height: 2.05; }
.policy ul { margin-top: 8px; }
.policy li { position: relative; padding-left: 1.2em; }
.policy li::before { content: ""; position: absolute; left: 2px; top: .95em; width: 6px; height: 6px; border-radius: 50%; background: var(--blue-500); }
.policy a { color: var(--blue); text-decoration: underline; text-underline-offset: 3px; }
.policy-date { margin-top: 48px; text-align: right; color: var(--muted); }

/* フッター */
.sub-footer { background: var(--bg-dark); color: var(--fg-dark); padding: 56px var(--gutter) 28px; }
.sub-footer-inner { max-width: var(--container); margin: 0 auto; display: flex; flex-wrap: wrap; justify-content: space-between; gap: 32px; }
.sub-footer-logo img { height: 44px; width: auto; margin-bottom: 16px; }
.sub-footer-addr { font-size: 13px; line-height: 1.9; color: rgba(242,242,242,.75); }
.sub-footer-nav { display: grid; gap: 10px; font-size: 13px; }
.sub-footer-nav a:hover { color: var(--cyan); }
.sub-copy { max-width: var(--container); margin: 40px auto 0; font-family: var(--font-en); font-size: 11px; letter-spacing: .06em; color: rgba(242,242,242,.5); }