.contact-section {
      background: linear-gradient(135deg, #ff9a8b 0%, #ff8a80 100%);
      color: white;
      text-align: center;
      padding: 60px 20px;
    }
    .contact-section h2 {
      color: white;
      margin-bottom: 30px;
    }
    .contact-section h2::after {
      background: white;
    }
    .contact-section p {
      font-size: 1.2rem;
      margin-bottom: 30px;
    }
    .contact-buttons {
      display: flex;
      gap: 20px;
      justify-content: center;
      flex-wrap: wrap;
    }
    .contact-buttons .btn {
      padding: 15px 35px;
      border-radius: 30px;
      text-decoration: none;
      font-weight: bold;
      transition: all 0.3s ease;
      background: white;
      color: #ff6b6b;
    }
    .contact-buttons .btn:hover {
      transform: translateY(-2px);
      box-shadow: 0 5px 20px rgba(255,255,255,0.3);
    }
    .dev-intro { max-width: 900px; margin: 0 auto 48px; text-align: center; line-height: 1.9; }
    .dev-intro p + p { margin-top: 16px; }
    .dev-catch { font-size: clamp(1.25rem, 3vw, 1.7rem); font-weight: 700; color: #b71c1c; }
    .dev-consult { display: inline-block; margin-top: 24px; padding: 14px 24px; border-radius: 28px; background: #b71c1c; color: #fff; font-weight: 700; text-decoration: none; }
    .dev-consult:hover { background: #8e1616; }
    .dev-consult:focus-visible, .dev-faq summary:focus-visible { outline: 3px solid #b71c1c; outline-offset: 4px; }
    .dev-section { margin: 0 0 48px; line-height: 1.9; }
    .dev-section > h2 { text-align: center; color: #b71c1c; font-size: 1.7rem; margin-bottom: 24px; }
    .dev-concerns { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 16px 32px; padding: 24px 24px 24px 44px; background: #fff5f5; border-radius: 10px; }
    .dev-section .service-card h3 { font-size: 1.25rem; color: #b71c1c; margin-bottom: 16px; line-height: 1.6; }
    .dev-highlight { padding: 28px; border: 1px solid #efdada; border-radius: 12px; background: #fff8f8; }
    .dev-two-columns { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 24px; margin-top: 24px; }
    .dev-two-columns h3 { color: #b71c1c; margin-bottom: 8px; }
    .dev-guidance { padding: 56px 0 8px; background: #fafafa; }
    .dev-process { display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); gap: 24px; padding-left: 24px; }
    .dev-process li { padding: 16px; background: #fff; border-top: 3px solid #b71c1c; border-radius: 6px; }
    .dev-process li::marker { color: #b71c1c; font-weight: 700; }
    .dev-process h3 { font-size: 1.05rem; color: #b71c1c; margin-bottom: 10px; }
    .dev-faq { padding: 20px; border: 1px solid #e5e5e5; border-radius: 8px; background: #fff; }
    .dev-faq + .dev-faq { margin-top: 12px; }
    .dev-faq summary { color: #b71c1c; font-weight: 700; cursor: pointer; }
    .dev-faq p { margin-top: 12px; }
    @media (max-width: 1000px) { .dev-process { grid-template-columns: repeat(2, minmax(0, 1fr)); } }
    @media (max-width: 800px) {
      #enterprise > .container, .dev-guidance > .container { padding-left: 20px; padding-right: 20px; }
      .dev-intro { text-align: left; }
      .dev-consult { display: table; max-width: 100%; margin: 24px auto 0; text-align: center; }
      .dev-concerns, .dev-two-columns, .dev-process { grid-template-columns: 1fr; }
      .dev-highlight { padding: 24px 20px; }
    }
    /* 開発実績・対応技術・強み：このページ内だけに適用 */
    .dev-showcase, .dev-skills { padding: 48px 0; border-top: 1px solid #eadede; }
    .dev-block-heading { text-align: center; margin-bottom: 30px; }
    .dev-block-heading h2 { color: #b71c1c; font-size: clamp(1.5rem, 3vw, 2rem); margin: 0 0 12px; }
    .dev-block-heading p { max-width: 760px; margin: 0 auto; color: #555; line-height: 1.9; }
    .dev-case-grid { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 24px; }
    .dev-case { display: flex; flex-direction: column; min-width: 0; padding: 28px; border: 1px solid #e8dede; border-top: 4px solid #b71c1c; border-radius: 12px; background: #fff; box-shadow: 0 3px 14px rgba(0,0,0,.04); }
    .dev-case-category { align-self: flex-start; padding: 4px 12px; margin-bottom: 16px; border-radius: 4px; color: #a71919; background: #fff0f0; font-size: .85rem; font-weight: 700; }
    .dev-case h3 { font-size: 1.25rem; line-height: 1.6; margin: 0 0 10px; }
    .dev-case-scale { color: #666; font-size: .9rem; line-height: 1.7; margin-bottom: 16px; }
    .dev-case-description { line-height: 1.9; margin-bottom: 20px; }
    .dev-case-metrics { display: flex; flex-wrap: wrap; gap: 8px; list-style: none; padding: 0; margin: auto 0 20px; }
    .dev-case-metrics li { padding: 6px 12px; border-radius: 5px; background: #f5f5f5; font-size: .9rem; font-weight: 500; }
    .dev-case-details { border-top: 1px solid #eee; padding-top: 14px; }
    .dev-case-details summary { cursor: pointer; color: #b71c1c; font-size: .9rem; font-weight: 700; }
    .dev-case-details summary:focus-visible { outline: 3px solid #b71c1c; outline-offset: 4px; }
    .dev-case-details .dev-skill-tags { margin-top: 14px; }
    .dev-skill-grid { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 20px; }
    .dev-skill { min-width: 0; padding: 24px; border: 1px solid #e5e5e5; border-radius: 10px; background: #fff; }
    .dev-skill:first-child { border-color: #dcaaaa; background: #fff8f8; }
    .dev-skill h3 { margin: 0 0 8px; font-size: 1.15rem; color: #b71c1c; }
    .dev-skill > p { color: #666; font-size: .9rem; line-height: 1.8; margin: 0 0 18px; }
    .dev-skill-tags { display: flex; flex-wrap: wrap; gap: 8px; padding: 0; margin: 0; list-style: none; }
    .dev-skill-tags li { max-width: 100%; overflow-wrap: anywhere; background: #f5f5f5; border: 1px solid #e5e5e5; color: #444; font-size: .85rem; line-height: 1.6; border-radius: 5px; padding: 5px 10px; }
    .dev-strengths { padding: 56px 0; background: #f7f3f3; }
    .dev-strength-grid { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 24px; }
    .dev-strength { min-width: 0; padding: 28px; border-radius: 12px; background: #fff; }
    .dev-strength-number { display: inline-block; color: #b71c1c; font-size: 1.8rem; font-weight: 700; margin-bottom: 14px; }
    .dev-strength h3 { font-size: 1.2rem; line-height: 1.7; margin-bottom: 16px; }
    .dev-strength p { color: #555; line-height: 1.9; }
    @media (max-width: 1000px) { .dev-strength-grid { grid-template-columns: 1fr; } }
    @media (max-width: 700px) {
      .dev-case-grid, .dev-skill-grid { grid-template-columns: 1fr; }
      .dev-case, .dev-skill, .dev-strength { padding: 24px 20px; }
      .dev-showcase, .dev-skills { padding: 36px 0; }
      .dev-strengths > .container { padding-left: 20px; padding-right: 20px; }
    }