.site-footer { border-top: 1px solid #e5e7eb; background: #f7f8fa; color: #4b5563; }
.site-footer__inner { width: min(calc(100% - 48px), var(--aiwt-content-width)); margin: 0 auto; padding: 58px 0 24px; }
.site-footer__widgets { display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); gap: 34px; padding-bottom: 46px; }
.footer-widget__title { margin: 0 0 16px; color: #1f2937; font-size: 15px; line-height: 1.5; }
.footer-widget ul { margin: 0; padding: 0; list-style: none; }
.footer-widget li + li { margin-top: 8px; }
.footer-widget a { color: #5f6875; font-size: 14px; }
.footer-widget a:hover { color: var(--aiwt-accent-dark); }
.site-footer__brand { padding-top: 34px; border-top: 1px solid #dde2e7; text-align: center; }
.site-footer__logo { display: inline-flex; align-items: center; justify-content: center; color: #1f2937; font-size: 21px; font-weight: 900; }
.site-footer__logo:hover { color: #1f2937; text-decoration: none; }
.site-footer__logo img { display: block; width: var(--aiwt-logo-pc-width, 190px); max-width: 230px; height: auto; }
.footer-about { max-width: 760px; margin: 20px auto 0; color: #6b7280; font-size: 13px; line-height: 1.8; }
.footer-legal-nav { margin-top: 22px; }
.footer-legal-nav__menu { display: flex; flex-wrap: wrap; align-items: center; justify-content: center; gap: 8px 20px; margin: 0; padding: 0; list-style: none; }
.footer-legal-nav__menu a { color: #6b7280; font-size: 12px; }
.footer-legal-nav__menu a:hover { color: var(--aiwt-accent-dark); }
.site-footer__credit { margin: 18px 0 0; color: #9ca3af; font-size: 12px; }
.footer-company { margin: 4px 0 0; color: #9ca3af; font-size: 12px; }
.footer-company a { color: #6b7280; }
.back-to-top {
  position: fixed;
  right: 24px;
  bottom: 24px;
  z-index: 900;
  display: flex;
  align-items: center;
  justify-content: center;
  width: 46px;
  height: 46px;
  padding: 0;
  border: 1px solid #dbe3ec;
  border-radius: 50%;
  background: rgba(255,255,255,.94);
  color: var(--aiwt-navy);
  box-shadow: 0 8px 24px rgba(18,48,74,.12);
  opacity: 0;
  visibility: hidden;
  pointer-events: none;
  cursor: pointer;
  transform: translateY(8px);
  transition: opacity .18s ease, visibility .18s ease, transform .18s ease;
}
.back-to-top.is-visible { opacity: 1; visibility: visible; pointer-events: auto; transform: translateY(0); }
.back-to-top .dashicons { width: 20px; height: 20px; font-size: 20px; line-height: 20px; }