* {
      margin: 0;
      padding: 0;
      box-sizing: border-box;
    }

    body {
      font-family: system-ui, -apple-system, 'Segoe UI', Roboto, 'Helvetica Neue', Helvetica, sans-serif;
      background-color: #ffffff;
      color: #111111;
      line-height: 1.5;
      scroll-behavior: smooth;
    }

    .container {
      max-width: 1280px;
      margin: 0 auto;
      padding: 0 24px;
    }

    .header {
      background-color: #ffffff;
      border-bottom: 1px solid #e5e7eb;
      position: sticky;
      top: 0;
      z-index: 50;
    }

    .nav {
      display: flex;
      justify-content: space-between;
      align-items: center;
      flex-wrap: wrap;
      padding: 18px 0;
    }

    .logo {
      font-size: 1.8rem;
      font-weight: 700;
      letter-spacing: -0.02em;
      background: linear-gradient(135deg, #25D366, #128C7E);
      -webkit-background-clip: text;
      background-clip: text;
      color: transparent;
      text-decoration: none;
    }

    .nav-links {
      display: flex;
      gap: 32px;
      align-items: center;
      list-style: none;
    }

    .nav-links a {
      text-decoration: none;
      font-weight: 500;
      color: #1f2937;
      transition: color 0.2s;
      font-size: 1rem;
    }

    .nav-links a:hover {
      color: #25D366;
    }

    .nav-links .active {
      color: #128C7E;
      font-weight: 600;
    }

    .faq-hero {
      background: linear-gradient(135deg, #f0fdf4 0%, #ffffff 100%);
      padding: 64px 0 48px;
      text-align: center;
    }

    .faq-hero h1 {
      font-size: 2.8rem;
      font-weight: 800;
      background: linear-gradient(135deg, #075e54, #128C7E);
      -webkit-background-clip: text;
      background-clip: text;
      color: transparent;
      margin-bottom: 16px;
    }

    .faq-hero p {
      font-size: 1.2rem;
      color: #374151;
      max-width: 640px;
      margin: 0 auto 32px;
    }

    .search-box {
      max-width: 560px;
      margin: 0 auto;
      position: relative;
    }

    .search-box input {
      width: 100%;
      padding: 16px 24px;
      border-radius: 60px;
      border: 1px solid #d1d5db;
      font-size: 1rem;
      outline: none;
      background: white;
      transition: all 0.2s;
      box-shadow: 0 2px 6px rgba(0,0,0,0.03);
    }

    .search-box input:focus {
      border-color: #25D366;
      box-shadow: 0 0 0 3px rgba(37,211,102,0.2);
    }

    .faq-categories {
      display: flex;
      flex-wrap: wrap;
      justify-content: center;
      gap: 12px;
      margin: 48px 0 32px;
    }

    .cat-btn {
      background: #f3f4f6;
      border: none;
      padding: 8px 24px;
      border-radius: 40px;
      font-weight: 500;
      cursor: pointer;
      transition: all 0.2s;
      font-size: 0.9rem;
      color: #1f2937;
    }

    .cat-btn.active {
      background: #25D366;
      color: white;
    }

    .cat-btn:hover:not(.active) {
      background: #e5e7eb;
    }

    .faq-list {
      max-width: 880px;
      margin: 32px auto 80px;
    }

    .faq-item {
      background: #ffffff;
      border-radius: 24px;
      margin-bottom: 16px;
      border: 1px solid #edf2f0;
      transition: all 0.2s;
    }

    .faq-question {
      padding: 20px 28px;
      font-weight: 600;
      font-size: 1.05rem;
      cursor: pointer;
      display: flex;
      justify-content: space-between;
      align-items: center;
      color: #111827;
    }

    .faq-question:hover {
      background-color: #fafcfe;
    }

    .faq-answer {
      padding: 0 28px 24px 28px;
      color: #4b5563;
      border-top: 1px solid #f0f2f4;
      display: none;
      line-height: 1.6;
    }

    .faq-answer.show {
      display: block;
    }

    .icon-toggle {
      font-size: 1.3rem;
      font-weight: 400;
      color: #128C7E;
    }

    .no-results {
      text-align: center;
      padding: 60px 20px;
      background: #f9fafb;
      border-radius: 48px;
      color: #6b7280;
    }

    .contact-support {
      background: #f0fdf4;
      border-radius: 32px;
      padding: 40px 32px;
      text-align: center;
      margin: 32px auto 64px;
      max-width: 800px;
    }

    .contact-support h3 {
      font-size: 1.5rem;
      margin-bottom: 12px;
    }

    .support-link {
      display: inline-block;
      margin-top: 20px;
      background: #25D366;
      color: white;
      padding: 12px 32px;
      border-radius: 40px;
      text-decoration: none;
      font-weight: 600;
    }

    .footer {
      border-top: 1px solid #eaeef3;
      padding: 48px 0 32px;
      background: #fafcff;
    }

    .footer-grid {
      display: flex;
      flex-wrap: wrap;
      justify-content: space-between;
      gap: 32px;
      margin-bottom: 40px;
    }

    .footer-col {
      min-width: 140px;
    }

    .footer-col h4 {
      font-weight: 600;
      margin-bottom: 18px;
      color: #111827;
    }

    .footer-col ul {
      list-style: none;
    }

    .footer-col li {
      margin-bottom: 12px;
    }

    .footer-col a {
      text-decoration: none;
      color: #4b5563;
      font-size: 0.9rem;
    }

    .footer-col a:hover {
      color: #128C7E;
    }

    .copyright {
      text-align: center;
      padding-top: 28px;
      border-top: 1px solid #e5e7eb;
      font-size: 0.8rem;
      color: #6c757d;
    }

    @media (max-width: 768px) {
      .nav {
        flex-direction: column;
        gap: 16px;
      }
      .nav-links {
        flex-wrap: wrap;
        justify-content: center;
        gap: 20px;
      }
      .faq-hero h1 {
        font-size: 2rem;
      }
      .faq-question {
        padding: 16px 20px;
        font-size: 0.95rem;
      }
      .faq-answer {
        padding: 0 20px 20px 20px;
      }
    }