.site-footer {
    background:
      radial-gradient(ellipse 70% 50% at 20% 0%, rgba(30,79,199,0.12) 0%, transparent 60%),
      radial-gradient(ellipse 60% 50% at 80% 100%, rgba(92,130,232,0.06) 0%, transparent 60%),
      linear-gradient(180deg, #0a0f1f 0%, #0B1524 100%);
    color: rgba(255,255,255,0.6);
    padding: 80px 0 32px;
    font-size: 13px;
    position: relative;
    overflow: hidden;
  }
  .site-footer::before {
    content: "";
    position: absolute; top: 0; left: 0; right: 0; height: 1px;
    background: linear-gradient(90deg, transparent, rgba(92,130,232,0.40), transparent);
  }
  .site-footer::after {
    content: "";
    position: absolute; inset: 0;
    background-image:
      linear-gradient(rgba(255,255,255,0.022) 1px, transparent 1px),
      linear-gradient(90deg, rgba(255,255,255,0.022) 1px, transparent 1px);
    background-size: 48px 48px;
    -webkit-mask-image: radial-gradient(ellipse at center, black 30%, transparent 85%);
            mask-image: radial-gradient(ellipse at center, black 30%, transparent 85%);
    pointer-events: none;
  }
  .site-footer .container {
    position: relative;
    z-index: 1;
    max-width: 1240px;
    margin: 0 auto;
    padding: 0 40px;
  }
  .site-footer .footer-top {
    display: grid;
    grid-template-columns: 1.6fr 1fr 1fr 1fr;
    gap: 60px;
    padding-bottom: 52px;
    border-bottom: 1px solid rgba(255,255,255,0.08);
    margin-bottom: 32px;
  }

  /* ---------- Brand block ---------- */
  .site-footer .footer-brand .logo {
    display: inline-flex; align-items: center; gap: 12px;
    margin-bottom: 22px;
    text-decoration: none;
    color: #fff;
    line-height: 1;
  }
  /* WP custom-logo / テーマ設定でアップロードした画像（boostx_get_logo(true) の出力）— 大きめ */
  .site-footer .footer-brand .boostx-footer-logo-img,
  .site-footer .footer-brand .logo img {
    height: 56px;
    width: auto;
    max-width: 280px;
    object-fit: contain;
    filter: drop-shadow(0 0 16px rgba(92,130,232,0.28));
  }
  /* SVGフォールバック（ロゴ未アップ時）— boostx_get_logo の text 部分も大きく */
  .site-footer .footer-brand .logo .text-3xl { font-size: 30px; line-height: 1; }
  .site-footer .footer-brand .logo .w-7 { width: 28px; }
  .site-footer .footer-brand .logo .h-7 { height: 28px; }
  /* ロゴ直下：会社の説明文（明るめ・読ませる） */
  .site-footer .footer-tagline {
    font-size: 13.5px;
    line-height: 1.85;
    color: rgba(255,255,255,0.78);
    font-weight: 500;
    margin: 0 0 20px;
    max-width: 360px;
    letter-spacing: 0.01em;
  }
  /* 住所（控えめ） */
  .site-footer .footer-desc {
    font-size: 12.5px;
    line-height: 1.95;
    color: rgba(255,255,255,0.50);
    max-width: 340px;
    font-weight: 500;
    font-style: normal;
    margin: 0;
    letter-spacing: 0.01em;
  }

  /* ---------- Columns ---------- */
  .site-footer .footer-col h4 {
    font-size: 11px;
    font-weight: 800;
    color: #5C82E8;
    letter-spacing: 0.22em;
    text-transform: uppercase;
    margin: 0 0 26px;
    font-family: 'Inter', 'Plus Jakarta Sans', system-ui, -apple-system, sans-serif;
    position: relative;
    padding-bottom: 14px;
  }
  .site-footer .footer-col h4::after {
    content: "";
    position: absolute; bottom: 0; left: 0; right: 0;
    height: 1px;
    background: linear-gradient(90deg, rgba(92,130,232,0.40), rgba(255,255,255,0.05));
  }
  .site-footer .footer-col ul { list-style: none; padding: 0; margin: 0; }
  .site-footer .footer-col li { margin-bottom: 14px; }
  .site-footer .footer-col a {
    font-size: 13.5px;
    color: rgba(255,255,255,0.78);
    transition: color 0.25s, transform 0.25s, padding-left 0.25s;
    display: inline-flex; align-items: center;
    font-weight: 500;
    letter-spacing: 0.01em;
    text-decoration: none;
  }
  .site-footer .footer-col a:hover {
    color: #fff;
    padding-left: 4px;
  }
  .site-footer .footer-col a::before {
    content: "→";
    display: inline-block;
    margin-right: 0;
    width: 0; overflow: hidden;
    opacity: 0;
    color: #5C82E8;
    transition: width 0.25s, opacity 0.25s, margin-right 0.25s;
  }
  .site-footer .footer-col a:hover::before {
    width: 14px;
    margin-right: 6px;
    opacity: 1;
  }

  /* ---------- Bottom bar ---------- */
  .site-footer .footer-bottom {
    display: flex; justify-content: space-between; align-items: center;
    font-size: 11.5px;
    color: rgba(255,255,255,0.40);
    font-weight: 500;
    letter-spacing: 0.04em;
    padding-top: 24px;
  }
  .site-footer .footer-bottom .legal { display: flex; gap: 32px; }
  .site-footer .footer-bottom .legal a {
    color: rgba(255,255,255,0.50);
    font-weight: 500;
    transition: color 0.25s;
    text-decoration: none;
  }
  .site-footer .footer-bottom .legal a:hover {
    color: #5C82E8;
  }

  /* ---------- Responsive ---------- */
  @media (max-width: 960px) {
    .site-footer .footer-top {
      grid-template-columns: 1fr 1fr;
      gap: 40px 32px;
    }
    .site-footer .footer-brand { grid-column: 1 / -1; }
    .site-footer .footer-brand .boostx-footer-logo-img,
    .site-footer .footer-brand .logo img { height: 52px; }
  }
  @media (max-width: 640px) {
    .site-footer { padding: 64px 0 28px; }
    .site-footer .container { padding: 0 24px; }
    .site-footer .footer-top {
      grid-template-columns: 1fr;
      gap: 36px;
      padding-bottom: 40px;
      margin-bottom: 24px;
    }
    .site-footer .footer-brand .boostx-footer-logo-img,
    .site-footer .footer-brand .logo img { height: 48px; }
    .site-footer .footer-tagline { font-size: 13px; max-width: 100%; }
    .site-footer .footer-desc { max-width: 100%; }
    .site-footer .footer-bottom {
      flex-direction: column;
      gap: 16px;
      align-items: flex-start;
    }
    .site-footer .footer-bottom .legal { gap: 20px; flex-wrap: wrap; }
  }