:root {
    --color-primary: #0055ff;
    --color-secondary: #00ccff;
    --font-family: 'Helvetica Neue', Arial, sans-serif;
    --font-size-base: 16px;
    --border-radius: 8px;
    --box-shadow: 0 4px 10px rgba(0,0,0,0.1);
    --header-height: 70px;
  }

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

  body {
    font-family: var(--font-family);
    font-size: var(--font-size-base);
    line-height: 1.6;
    color: #222;
    background-color: #f5f9ff;
    color-scheme: light;
  }

  a {
    text-decoration: none;
    color: inherit;
  }

  /* Container */
  .container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
  }

  /* Header */
  header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: var(--header-height);
    background-color: #ffffff;
    border-bottom: 1px solid #e0e0e0;
    position: sticky;
    top: 0;
    z-index: 1000;
  }
  .logo {
    display: flex;
    align-items: center;
  }
  .nav {
    display: flex;
    align-items: center;
  }
  .nav-links {
    display: flex;
    align-items: center;
    gap: 0;
    flex-wrap: wrap;
  }
  .nav-item {
    margin: 0 10px;
    font-weight: 500;
    font-size: 15px;
    cursor: pointer;
  }
  .nav-item:hover {
    color: var(--color-primary);
  }
  .menu-toggle {
    display: none;
    font-size: 24px;
    cursor: pointer;
  }

  /* Hero */
  .hero {
    background: linear-gradient(135deg, #003366, #0055ff);
    text-align: center;
    padding: 80px 20px;
    color: #fff;
    position: relative;
  }
  .hero h1 {
    font-size: 2.2em;
    margin-bottom: 20px;
    font-weight: 700;
  }
  .hero p {
    font-size: 1.2em;
    margin-bottom: 30px;
  }
  .btn-cta {
    display: inline-block;
    padding: 14px 28px;
    background-color: #ffcc00;
    color: #222;
    border-radius: 50px;
    font-weight: 600;
    box-shadow: 0 4px 12px rgba(0,0,0,0.2);
    transition: background-color 0.3s, transform 0.2s;
  }
  .btn-cta:hover {
    background-color: #e6b000;
    transform: translateY(-2px);
  }

  /* Features & Stats */
  .section {
    padding: 60px 20px;
    background-color: #ffffff;
  }
  .section-title {
    text-align: center;
    margin-bottom: 40px;
    font-size: 2em;
    font-weight: 700;
    color: #222;
  }
  .stats {
    display: flex;
    flex-wrap: wrap;
    justify-content: space-around;
    gap: 20px;
  }
  .stat-card {
    flex: 1 1 200px;
    background-color: #f0f8ff;
    padding: 20px;
    border-radius: var(--border-radius);
    box-shadow: var(--box-shadow);
    text-align: center;
    transition: transform 0.2s, box-shadow 0.2s;
  }
  .stat-card:hover {
    box-shadow: 0 8px 20px rgba(0,0,0,0.15);
    transform: translateY(-3px);
  }
  .stat-number {
    font-size: 2.5em;
    font-weight: bold;
    color: var(--color-primary);
    margin-bottom: 10px;
  }
  .stat-label {
    font-size: 1em;
    color: #555;
  }

  /* Service Modules */
  .section-services {
    background-color: #f5f9ff;
  }
  .service-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
    gap: 20px;
  }
  .service-card {
    background: #fff;
    padding: 20px;
    border-radius: var(--border-radius);
    box-shadow: var(--box-shadow);
    transition: box-shadow 0.2s, transform 0.2s;
  }
  .service-card:hover {
    box-shadow: 0 4px 15px rgba(0,0,0,0.2);
    transform: translateY(-2px);
  }
  .service-title {
    font-size: 1.2em;
    margin-bottom: 10px;
    font-weight: 600;
    color: #222;
  }
  .service-desc {
    font-size: 0.95em;
    color: #555;
  }

  /* Workflow & Steps */
  .section-flow {
    padding: 60px 20px;
  }
  .flow-steps {
    display: flex;
    flex-direction: column;
    gap: 30px;
  }
  .step {
    background-color: #ffffff;
    padding: 20px;
    border-radius: var(--border-radius);
    box-shadow: var(--box-shadow);
    transition: box-shadow 0.2s, transform 0.2s;
  }
  .step:hover {
    box-shadow: 0 4px 12px rgba(0,0,0,0.15);
    transform: translateY(-2px);
  }
  .step-title {
    font-size: 1.3em;
    margin-bottom: 10px;
    font-weight: 600;
    color: #222;
  }
  .step-desc {
    font-size: 0.95em;
    color: #555;
  }

  /* Comparison Table */
  .section-compare {
    padding: 60px 20px;
    background-color: #f0f8ff;
  }
  .compare-table {
    width: 100%;
    border-collapse: collapse;
    overflow-x: auto;
  }
  .compare-table th, .compare-table td {
    border: 1px solid #ccc;
    padding: 12px 15px;
    text-align: center;
  }
  .compare-table th {
    background-color: #e0f0ff;
    font-weight: 600;
  }
  .compare-title {
    text-align: center;
    font-size: 2em;
    margin-bottom: 30px;
    font-weight: 700;
    color: #222;
  }

  /* FAQ Section */
  .section-faq {
    padding: 60px 20px;
  }
  .faq-item {
    background-color: #fff;
    margin-bottom: 10px;
    border-radius: var(--border-radius);
    overflow: hidden;
    box-shadow: var(--box-shadow);
  }
  .faq-question {
    padding: 15px 20px;
    cursor: pointer;
    background-color: #f0f8ff;
    font-weight: 600;
    transition: background-color 0.2s;
  }
  .faq-question:hover {
    background-color: #e0f0ff;
  }
  .faq-answer {
    max-height: 0;
    overflow: hidden;
    padding: 0 20px;
    transition: max-height 0.3s ease;
    background-color: #fff;
  }
  .faq-answer.open {
    max-height: 300px;
    padding: 15px 20px;
  }

  /* Customer Reviews */
  .section-reviews {
    background-color: #f5f9ff;
    padding: 60px 20px;
  }
  .reviews-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 20px;
  }
  .review-card {
    background: #fff;
    padding: 20px;
    border-radius: var(--border-radius);
    box-shadow: var(--box-shadow);
    display: flex;
    flex-direction: column;
    gap: 10px;
  }
  .review-user {
    font-weight: 600;
    color: #222;
  }
  .review-text {
    font-size: 0.95em;
    color: #555;
  }

  /* Case Studies & Articles */
  .section-cases {
    padding: 60px 20px;
  }
  .cases-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 20px;
  }
  .case-card {
    background: #fff;
    border-radius: var(--border-radius);
    box-shadow: var(--box-shadow);
    overflow: hidden;
    display: flex;
    flex-direction: column;
  }
  .case-img {
    width: 100%;
    height: 150px;
    object-fit: cover;
  }
  .case-content {
    padding: 15px;
    flex: 1;
  }
  .case-title {
    font-size: 1.2em;
    margin-bottom: 8px;
    font-weight: 600;
    color: #222;
  }
  .case-desc {
    font-size: 0.95em;
    color: #555;
  }

  /* Form Section */
  .section-form {
    background-color: #ffffff;
    padding: 60px 20px;
  }
  .form-title {
    text-align: center;
    font-size: 2em;
    font-weight: 700;
    margin-bottom: 30px;
    color: #222;
  }
  .contact-form {
    max-width: 700px;
    margin: 0 auto;
    display: flex;
    flex-wrap: wrap;
    gap: 20px;
  }
  .form-group {
    flex: 1 1 45%;
    display: flex;
    flex-direction: column;
  }
  .form-group-full {
    flex: 1 1 100%;
  }
  label {
    margin-bottom: 8px;
    font-weight: 600;
    font-size: 0.95em;
  }
  input[type="text"], input[type="tel"], input[type="email"], select, textarea {
    padding: 12px;
    border: 1px solid #ccc;
    border-radius: var(--border-radius);
    font-size: 1em;
    transition: border-color 0.2s;
  }
  input[type="text"]:focus, input[type="tel"]:focus, input[type="email"]:focus, select:focus, textarea:focus {
    border-color: var(--color-primary);
    outline: none;
  }
  textarea {
    resize: vertical;
    min-height: 100px;
  }
  .submit-btn {
    display: inline-block;
    padding: 14px 30px;
    background-color: var(--color-primary);
    color: #fff;
    border: none;
    border-radius: 50px;
    font-weight: 600;
    cursor: pointer;
    transition: background-color 0.3s, transform 0.2s;
  }
  .submit-btn:hover {
    background-color: #003366;
    transform: translateY(-2px);
  }

  /* Footer */
  footer {
    background-color: #222;
    color: #fff;
    font-size: 14px;
    line-height: 1.4;
    padding: 40px 20px;
  }
  .footer-container {
    display: flex;
    flex-wrap: wrap;
    justify-content: space-between;
    gap: 20px;
  }
  .footer-section {
    flex: 1 1 200px;
  }
  .footer-logo {
    display: flex;
    align-items: center;
    margin-bottom: 10px;
  }
  .footer-links {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
  }
  .footer-link {
    color: #ddd;
    font-size: 0.95em;
  }
  .footer-link:hover {
    color: #fff;
    text-decoration: underline;
  }
  .footer-copy {
    margin-top: 20px;
    font-size: 0.85em;
  }
  /* Floating button for top */
  .back-to-top {
    position: fixed;
    bottom: 100px;
    right: 20px;
    background-color: var(--color-primary);
    color: #fff;
    width: 45px;
    height: 45px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    font-size: 20px;
    box-shadow: var(--box-shadow);
    transition: background-color 0.3s, transform 0.2s;
    z-index: 999;
  }
  .back-to-top:hover {
    background-color: #003366;
    transform: scale(1.1);
  }

  /* Responsive */
  @media(max-width: 1024px) {
    header {
      flex-direction: column;
      height: auto;
      padding: 10px 20px;
    }
    .nav {
      margin-top: 10px;
    }
    .nav-links {
      justify-content: center;
    }
    .menu-toggle {
      display: block;
    }
    .section {
      padding: 40px 20px;
    }
    .form-group {
      flex: 1 1 100%;
    }
  }