*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
    body {
      font-family: 'Noto Sans JP', sans-serif;
      color: #1B1D21; background: #F6F8FB;
      line-height: 1.8; -webkit-font-smoothing: antialiased;
      min-height: 100vh; display: flex; flex-direction: column;
    }
    img { max-width: 100%; display: block; }

    .container { max-width: 1180px; margin: 0 auto; padding: 0 56px; width: 100%; }

    /* ─── Header（トップと共通） ─── */
    .site-header {
      position: sticky; top: 0; width: 100%; z-index: 100;
      background: rgba(255,255,255,0.96); backdrop-filter: blur(14px);
      -webkit-backdrop-filter: blur(14px);
      border-bottom: 1px solid rgba(224,228,235,0.6);
      padding: 0 56px; height: 76px; overflow: hidden;
      display: flex; align-items: center; justify-content: space-between;
    }
    .site-logo { display: flex; align-items: center; text-decoration: none; flex-shrink: 0; }
    .site-logo img { height: 28px; width: auto; display: block; }
    .site-nav { display: flex; align-items: center; gap: 36px; }
    .site-nav a {
      font-size: 14px; color: #1B1D21; text-decoration: none;
      font-weight: 500; letter-spacing: 0.04em;
      transition: color 0.2s; position: relative;
    }
    .site-nav a:not(.nav-cta)::after {
      content: ''; position: absolute; left: 0; bottom: -6px;
      width: 0; height: 2px; background: #005AAA;
      transition: width 0.25s;
    }
    .site-nav a:not(.nav-cta):hover::after { width: 100%; }
    .site-nav a:not(.nav-cta):hover { color: #005AAA; }
    .nav-cta {
      background: #005AAA; color: #fff !important;
      padding: 11px 22px; border-radius: 4px;
      font-weight: 700; font-size: 13px;
      white-space: nowrap;
      transition: background 0.2s, transform 0.15s;
    }
    .nav-cta:hover { background: #004a8f; transform: translateY(-1px); }

    /* ─── パンくず ─── */
    .breadcrumb {
      font-size: 13px; color: #8a94a3;
      padding: 16px 0;
    }
    .breadcrumb a { color: #005AAA; text-decoration: none; }
    .breadcrumb a:hover { text-decoration: underline; }
    .breadcrumb .sep { margin: 0 10px; color: #b7bfcb; }
    .breadcrumb .current { color: #1B1D21; }

    /* ─── 本文 ─── */
    .thanks-body { flex: 1; display: flex; align-items: flex-start; padding: 72px 0 96px; }
    .thanks-card {
      background: #fff; border: 1px solid #E0E4EB;
      border-radius: 12px; padding: 72px 64px;
      box-shadow: 0 4px 32px rgba(13, 27, 53, 0.04);
      max-width: 680px; margin: 0 auto; text-align: center;
    }
    .thanks-check {
      width: 64px; height: 64px; border-radius: 50%;
      background: #EBF2FB; color: #005AAA;
      display: flex; align-items: center; justify-content: center;
      margin: 0 auto 28px;
    }
    .thanks-check svg { width: 30px; height: 30px; }
    .thanks-title {
      font-size: clamp(22px, 3vw, 30px); font-weight: 700;
      line-height: 1.5; margin-bottom: 16px;
    }
    .thanks-text { font-size: 15px; color: #555; line-height: 2; margin-bottom: 40px; }
    .btn-back {
      display: inline-block; background: #005AAA; color: #fff;
      text-decoration: none; font-weight: 700; font-size: 15px;
      padding: 16px 40px; border-radius: 4px; letter-spacing: 0.04em;
      transition: background 0.2s, transform 0.15s;
    }
    .btn-back:hover { background: #004a8f; transform: translateY(-2px); }

    /* Footer */
    .site-footer {
      background: #0A1628; color: rgba(255,255,255,0.7);
      padding: 80px 0 40px;
    }
    .footer-inner {
      display: grid; grid-template-columns: 1fr auto;
      gap: 60px; margin-bottom: 56px; align-items: flex-start;
    }
    .footer-logo img { height: 30px; width: auto; opacity: 0.9; }
    .footer-catch {
      font-size: 13px; margin-top: 20px;
      line-height: 1.85; max-width: 320px;
      color: rgba(255,255,255,0.6);
    }
    .footer-nav {
      display: grid; grid-template-columns: repeat(2, auto);
      gap: 14px 36px;
    }
    .footer-nav a {
      font-size: 13.5px; color: rgba(255,255,255,0.7);
      text-decoration: none; transition: color 0.2s;
      letter-spacing: 0.04em;
    }
    .footer-nav a:hover { color: #ffcd00; }
    .footer-bottom {
      border-top: 1px solid rgba(255,255,255,0.08);
      padding-top: 28px; font-size: 12px;
      color: rgba(255,255,255,0.5); letter-spacing: 0.04em;
    }

    @media (max-width: 980px) {
      .container { padding: 0 32px; }
      .footer-inner { grid-template-columns: 1fr; }
      .footer-nav { grid-template-columns: 1fr; gap: 2px; }
      .footer-nav a { display: inline-block; padding: 10px 0; }
    }
    @media (max-width: 640px) {
      .container { padding: 0 24px; }
      .site-header { padding: 0 20px; height: 64px; }
      .site-logo img { height: 24px; width: auto; display: block; }
      .site-nav { display: none; }
      .thanks-body { padding: 48px 0 64px; }
      .thanks-card { padding: 48px 24px; }
    }