body {
    margin: 0;
    padding: 0;
    background-color: #fff;
  }
  
  #contact {
    width: 100%;
    height: auto;
    min-height: auto;
  }
  
  /* コンテナ */
  .section-header {
    text-align: center;
    margin: 0 auto;
    padding: 40px 0;
    font: 300 60px 'Oswald', sans-serif;
    color: #fff;
    text-transform: uppercase;
    letter-spacing: 6px;
  }
  
  .contact-wrapper {
    display: flex;
    flex-direction: column;
    align-items: center;
    margin: 0 auto;
    position: relative;
    max-width: 760px;
    padding: 0 24px 80px;
    box-sizing: border-box;
    gap: 24px;
  }
  
  /* カードスタイル */
  .contact-card {
    width: 100%;
    background: #ffffff;
    border-radius: 16px;
    padding: 32px 28px;
    box-shadow: 0 18px 45px rgba(15, 23, 42, 0.12);
    border: 1px solid rgba(148, 163, 184, 0.25);
    box-sizing: border-box;
    display: flex;
    flex-direction: column;
    gap: 20px;
  }

  .contact-lead {
    margin: 0;
    font-size: 15px;
    line-height: 1.9;
    color: #4b5563;
  }

  .contact-meta {
    display: flex;
    flex-direction: column;
    gap: 12px;
  }

  .contact-label {
    margin: 0;
    font-size: 12px;
    font-weight: 600;
    letter-spacing: 0.14em;
    text-transform: uppercase;
    color: #9ca3af;
  }

  .contact-mail-link {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 12px 22px;
    border-radius: 999px;
    background: linear-gradient(90deg, #111827, #000000);
    color: #ffffff;
    font-size: 14px;
    font-weight: 600;
    letter-spacing: 0.03em;
    border: 1px solid rgba(156, 163, 175, 0.4);
    box-shadow: 0 12px 30px rgba(0, 0, 0, 0.25);
    text-decoration: none;
    transition: background 0.15s ease, box-shadow 0.15s ease, transform 0.08s ease;
  }

  .contact-mail-link::before {
    content: "✉";
    font-size: 16px;
  }

  .contact-mail-link:hover {
    background: linear-gradient(90deg, #000000, #111827);
    box-shadow: 0 16px 40px rgba(0, 0, 0, 0.32);
    transform: translateY(-1px);
  }

  .contact-mail-link:active {
    transform: translateY(0);
    box-shadow: 0 10px 24px rgba(0, 0, 0, 0.26);
  }

  .contact-note {
    margin: 0;
    font-size: 12px;
    color: #6b7280;
  }
  
  @media screen and (max-width: 600px) {

    #contact { position: relative; padding: 16px 0 40px; }

    h3 {
      margin-top: 10px;
      font-size: 14px;
    }

    .contact-wrapper {
      padding: 0 16px 56px;
      gap: 20px;
    }

    .contact-card {
      padding: 24px 20px;
      border-radius: 14px;
    }

    .contact-lead {
      font-size: 14px;
      line-height: 1.8;
    }

    .contact-mail-link {
      width: 100%;
    }
  }