/* CSS Variables & Global Styles */
    :root {
      --primary-color: #0052d4;
      --secondary-color: #4364f7;
      --accent-color: #6fb1fc;
      --vibrant-gradient: linear-gradient(135deg, #00c6ff 0%, #0072ff 100%);
      --neon-glow: 0 0 15px rgba(0, 198, 255, 0.4);
      --dark-text: #1e293b;
      --light-text: #64748b;
      --bg-light: #f8fafc;
      --bg-white: #ffffff;
      --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
      --container-width: 1200px;
    }

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

    body {
      font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
      color: var(--dark-text);
      background-color: var(--bg-light);
      line-height: 1.6;
      overflow-x: hidden;
    }

    /* Layout Components */
    .container {
      width: 100%;
      max-width: var(--container-width);
      margin: 0 auto;
      padding: 0 20px;
    }

    section {
      padding: 80px 0;
      position: relative;
    }

    /* Header Nav */
    header {
      background-color: rgba(255, 255, 255, 0.9);
      backdrop-filter: blur(10px);
      box-shadow: 0 2px 20px rgba(0, 0, 0, 0.05);
      position: sticky;
      top: 0;
      z-index: 1000;
      transition: var(--transition);
    }

    .nav-container {
      display: flex;
      justify-content: space-between;
      align-items: center;
      height: 70px;
    }

    .logo-area {
      display: flex;
      align-items: center;
      gap: 10px;
    }

    .ai-page-logo {
      height: 40px;
      width: auto;
      object-fit: contain;
    }

    .nav-links {
      display: flex;
      gap: 20px;
      align-items: center;
    }

    .nav-links a {
      text-decoration: none;
      color: var(--dark-text);
      font-weight: 500;
      font-size: 14px;
      transition: var(--transition);
    }

    .nav-links a:hover {
      color: var(--primary-color);
    }

    /* Primary Buttons */
    .btn {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      padding: 12px 28px;
      border-radius: 50px;
      font-weight: 600;
      text-decoration: none;
      transition: var(--transition);
      cursor: pointer;
      border: none;
    }

    .btn-primary {
      background: var(--vibrant-gradient);
      color: #fff;
      box-shadow: var(--neon-glow);
    }

    .btn-primary:hover {
      transform: translateY(-2px);
      box-shadow: 0 8px 25px rgba(0, 198, 255, 0.6);
    }

    .btn-secondary {
      background: #e2e8f0;
      color: var(--dark-text);
    }

    .btn-secondary:hover {
      background: #cbd5e1;
    }

    /* Hero Section (No Images Allowed) */
    .hero {
      background: radial-gradient(circle at 80% 20%, rgba(0, 198, 255, 0.15) 0%, transparent 50%),
                  radial-gradient(circle at 10% 80%, rgba(67, 100, 247, 0.15) 0%, transparent 50%),
                  #ffffff;
      padding: 100px 0 120px;
      text-align: center;
      border-bottom: 1px solid rgba(0, 198, 255, 0.1);
    }

    .h1-seo {
      font-size: clamp(28px, 4vw, 42px);
      line-height: 1.25;
      font-weight: 800;
      background: linear-gradient(135deg, #0052d4, #4364f7, #00c6ff);
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
      margin-bottom: 20px;
      letter-spacing: -0.5px;
    }

    .hero-subtitle {
      font-size: 18px;
      color: var(--light-text);
      max-width: 800px;
      margin: 0 auto 35px;
    }

    .hero-btn-group {
      display: flex;
      justify-content: center;
      gap: 15px;
      flex-wrap: wrap;
      margin-bottom: 40px;
    }

    .hero-badge-container {
      display: flex;
      justify-content: center;
      gap: 10px;
      flex-wrap: wrap;
      max-width: 800px;
      margin: 0 auto;
    }

    .hero-badge {
      background: rgba(0, 198, 255, 0.08);
      border: 1px solid rgba(0, 198, 255, 0.2);
      color: var(--primary-color);
      padding: 6px 14px;
      border-radius: 20px;
      font-size: 13px;
      font-weight: 500;
    }

    /* Section Titles */
    .section-title-wrap {
      text-align: center;
      margin-bottom: 50px;
    }

    .section-tag {
      display: inline-block;
      padding: 4px 12px;
      background: rgba(67, 100, 247, 0.1);
      color: var(--secondary-color);
      border-radius: 30px;
      font-size: 13px;
      font-weight: 600;
      margin-bottom: 15px;
      letter-spacing: 1px;
    }

    .section-title {
      font-size: 32px;
      font-weight: 700;
      color: var(--dark-text);
    }

    /* Grid Component Base */
    .grid-3 {
      display: grid;
      grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
      gap: 30px;
    }

    .grid-4 {
      display: grid;
      grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
      gap: 25px;
    }

    /* Data Metric Section */
    .metrics {
      background-color: var(--bg-white);
      padding: 60px 0;
      border-bottom: 1px solid #edf2f7;
    }

    .metric-card {
      text-align: center;
      padding: 20px;
    }

    .metric-num {
      font-size: 42px;
      font-weight: 800;
      color: var(--primary-color);
      line-height: 1;
      margin-bottom: 8px;
    }

    .metric-label {
      font-size: 14px;
      color: var(--light-text);
      font-weight: 500;
    }

    /* Cards Component */
    .feature-card {
      background: var(--bg-white);
      padding: 35px 25px;
      border-radius: 16px;
      box-shadow: 0 10px 30px rgba(0, 0, 0, 0.02);
      border: 1px solid rgba(0, 0, 0, 0.03);
      transition: var(--transition);
      position: relative;
      overflow: hidden;
    }

    .feature-card::before {
      content: '';
      position: absolute;
      top: 0;
      left: 0;
      width: 4px;
      height: 100%;
      background: var(--vibrant-gradient);
      opacity: 0;
      transition: var(--transition);
    }

    .feature-card:hover {
      transform: translateY(-5px);
      box-shadow: 0 15px 35px rgba(67, 100, 247, 0.1);
      border-color: rgba(67, 100, 247, 0.15);
    }

    .feature-card:hover::before {
      opacity: 1;
    }

    .feature-icon {
      width: 50px;
      height: 50px;
      border-radius: 12px;
      background: rgba(67, 100, 247, 0.08);
      color: var(--primary-color);
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 24px;
      margin-bottom: 20px;
    }

    .feature-card h3 {
      font-size: 18px;
      font-weight: 700;
      margin-bottom: 12px;
    }

    .feature-card p {
      font-size: 14px;
      color: var(--light-text);
      line-height: 1.5;
    }

    /* Workflow Styles */
    .step-list {
      display: grid;
      grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
      gap: 30px;
      position: relative;
    }

    .step-card {
      background: var(--bg-white);
      padding: 30px 20px;
      border-radius: 16px;
      border: 1px solid rgba(0, 198, 255, 0.1);
      text-align: center;
      position: relative;
    }

    .step-num {
      width: 40px;
      height: 40px;
      border-radius: 50%;
      background: var(--vibrant-gradient);
      color: #fff;
      display: flex;
      align-items: center;
      justify-content: center;
      font-weight: 700;
      margin: 0 auto 15px;
    }

    /* Table Styles */
    .table-container {
      width: 100%;
      overflow-x: auto;
      background: var(--bg-white);
      border-radius: 16px;
      box-shadow: 0 10px 30px rgba(0, 0, 0, 0.02);
      border: 1px solid rgba(0, 0, 0, 0.05);
    }

    table {
      width: 100%;
      border-collapse: collapse;
      text-align: left;
      min-width: 800px;
    }

    th, td {
      padding: 18px 24px;
      border-bottom: 1px solid #edf2f7;
      font-size: 14px;
    }

    th {
      background-color: rgba(67, 100, 247, 0.05);
      font-weight: 700;
      color: var(--dark-text);
    }

    tr:hover {
      background-color: rgba(67, 100, 247, 0.01);
    }

    .score-badge {
      display: inline-block;
      padding: 4px 10px;
      background: #ff4757;
      color: #fff;
      border-radius: 20px;
      font-weight: 700;
      font-size: 12px;
    }

    /* FAQ accordion styles */
    .faq-wrapper {
      max-width: 800px;
      margin: 0 auto;
    }

    .faq-item {
      background: var(--bg-white);
      border-radius: 12px;
      margin-bottom: 15px;
      border: 1px solid rgba(0, 0, 0, 0.03);
      overflow: hidden;
      transition: var(--transition);
    }

    .faq-title {
      padding: 20px 24px;
      font-weight: 600;
      font-size: 15px;
      cursor: pointer;
      display: flex;
      justify-content: space-between;
      align-items: center;
      user-select: none;
      transition: var(--transition);
    }

    .faq-title::after {
      content: '+';
      font-size: 20px;
      color: var(--primary-color);
      transition: transform 0.3s ease;
    }

    .faq-item.active .faq-title::after {
      content: '-';
      transform: rotate(180deg);
    }

    .faq-content {
      max-height: 0;
      overflow: hidden;
      transition: max-height 0.3s ease-out;
      padding: 0 24px;
      color: var(--light-text);
      font-size: 14px;
      line-height: 1.6;
    }

    .faq-item.active .faq-content {
      max-height: 200px;
      padding-bottom: 20px;
    }

    /* Image Grid / Cases */
    .media-card {
      border-radius: 16px;
      overflow: hidden;
      background: var(--bg-white);
      border: 1px solid rgba(0, 0, 0, 0.05);
      transition: var(--transition);
    }

    .media-card:hover {
      transform: translateY(-5px);
      box-shadow: 0 15px 30px rgba(0,0,0,0.08);
    }

    .media-img-wrap {
      width: 100%;
      height: 200px;
      background: #e2e8f0;
      overflow: hidden;
      position: relative;
    }

    .media-img-wrap img {
      width: 100%;
      height: 100%;
      object-fit: cover;
      transition: var(--transition);
    }

    .media-card:hover img {
      transform: scale(1.05);
    }

    .media-body {
      padding: 20px;
    }

    .media-body h4 {
      font-size: 16px;
      font-weight: 700;
      margin-bottom: 8px;
    }

    .media-body p {
      font-size: 13px;
      color: var(--light-text);
    }

    /* Form Styles */
    .form-wrapper {
      max-width: 600px;
      margin: 0 auto;
      background: var(--bg-white);
      padding: 40px;
      border-radius: 20px;
      box-shadow: 0 15px 40px rgba(0, 0, 0, 0.03);
      border: 1px solid rgba(0, 198, 255, 0.15);
    }

    .form-group {
      margin-bottom: 20px;
    }

    .form-group label {
      display: block;
      font-size: 14px;
      font-weight: 600;
      margin-bottom: 8px;
      color: var(--dark-text);
    }

    .form-control {
      width: 100%;
      padding: 12px 16px;
      border: 1px solid #cbd5e1;
      border-radius: 8px;
      font-size: 14px;
      outline: none;
      transition: var(--transition);
    }

    .form-control:focus {
      border-color: var(--primary-color);
      box-shadow: 0 0 0 3px rgba(0, 198, 255, 0.15);
    }

    /* Testimonials */
    .testimonial-card {
      background: var(--bg-white);
      padding: 30px;
      border-radius: 16px;
      border: 1px solid rgba(0, 0, 0, 0.02);
      box-shadow: 0 8px 25px rgba(0,0,0,0.01);
      position: relative;
    }

    .testimonial-text {
      font-size: 14px;
      color: var(--light-text);
      font-style: italic;
      margin-bottom: 20px;
    }

    .testimonial-user {
      display: flex;
      align-items: center;
      gap: 12px;
    }

    .user-info h5 {
      font-size: 14px;
      font-weight: 700;
      color: var(--dark-text);
    }

    .user-info p {
      font-size: 12px;
      color: var(--light-text);
    }

    /* Tag Cloud */
    .tag-cloud {
      display: flex;
      flex-wrap: wrap;
      justify-content: center;
      gap: 10px;
      margin-top: 30px;
    }

    .tag-item {
      background: #edf2f7;
      color: var(--dark-text);
      padding: 6px 12px;
      border-radius: 20px;
      font-size: 12px;
      font-weight: 500;
      transition: var(--transition);
    }

    .tag-item:hover {
      background: var(--primary-color);
      color: #fff;
    }

    /* Article List Area */
    .article-list {
      display: grid;
      grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
      gap: 20px;
    }

    .article-item {
      background: var(--bg-white);
      padding: 20px;
      border-radius: 12px;
      border-left: 4px solid var(--primary-color);
      box-shadow: 0 4px 15px rgba(0, 0, 0, 0.02);
    }

    .article-item h4 {
      font-size: 15px;
      margin-bottom: 10px;
    }

    .article-item a {
      color: var(--primary-color);
      text-decoration: none;
      font-weight: 600;
      font-size: 13px;
      display: inline-flex;
      align-items: center;
      gap: 5px;
    }

    .article-item a:hover {
      text-decoration: underline;
    }

    /* Floating widget */
    .floating-kefu {
      position: fixed;
      right: 20px;
      bottom: 100px;
      z-index: 999;
      display: flex;
      flex-direction: column;
      gap: 10px;
    }

    .kefu-btn {
      width: 50px;
      height: 50px;
      border-radius: 50%;
      background: var(--vibrant-gradient);
      color: #fff;
      display: flex;
      align-items: center;
      justify-content: center;
      cursor: pointer;
      box-shadow: 0 4px 15px rgba(0, 198, 255, 0.3);
      position: relative;
    }

    .kefu-qr-popup {
      position: absolute;
      right: 60px;
      bottom: 0;
      width: 150px;
      background: #fff;
      border-radius: 8px;
      padding: 10px;
      box-shadow: 0 10px 30px rgba(0,0,0,0.15);
      border: 1px solid rgba(0, 198, 255, 0.2);
      display: none;
    }

    .kefu-qr-popup img {
      width: 100%;
      height: auto;
      border-radius: 4px;
    }

    .kefu-btn:hover .kefu-qr-popup {
      display: block;
    }

    /* Footer */
    footer {
      background-color: #0f172a;
      color: #94a3b8;
      padding: 60px 0 30px;
      font-size: 14px;
      border-top: 1px solid #1e293b;
    }

    .footer-grid {
      display: grid;
      grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
      gap: 40px;
      margin-bottom: 40px;
    }

    .footer-col h5 {
      color: #fff;
      font-size: 16px;
      margin-bottom: 20px;
      font-weight: 700;
    }

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

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

    .footer-col ul li a {
      color: #94a3b8;
      text-decoration: none;
      transition: var(--transition);
    }

    .footer-col ul li a:hover {
      color: #fff;
    }

    .footer-bottom {
      border-top: 1px solid #1e293b;
      padding-top: 30px;
      display: flex;
      flex-wrap: wrap;
      justify-content: space-between;
      align-items: center;
      gap: 20px;
    }

    .friend-links {
      display: flex;
      flex-wrap: wrap;
      gap: 15px;
      align-items: center;
    }

    .friend-links a {
      color: #64748b;
      text-decoration: none;
      font-size: 13px;
    }

    .friend-links a:hover {
      color: #94a3b8;
    }

    .ai-page-home-link {
      color: #fff !important;
      font-weight: bold;
    }

    /* Mobile Nav Toggle */
    .menu-toggle {
      display: none;
      flex-direction: column;
      gap: 4px;
      background: none;
      border: none;
      cursor: pointer;
    }

    .menu-toggle span {
      width: 25px;
      height: 30px;
      height: 3px;
      background: var(--dark-text);
      border-radius: 2px;
      transition: var(--transition);
    }

    /* Media Queries */
    @media (max-width: 768px) {
      .menu-toggle {
        display: flex;
      }

      .nav-links {
        display: none;
        position: absolute;
        top: 70px;
        left: 0;
        width: 100%;
        background: #fff;
        flex-direction: column;
        padding: 20px;
        box-shadow: 0 10px 20px rgba(0,0,0,0.05);
        border-top: 1px solid #edf2f7;
      }

      .nav-links.active {
        display: flex;
      }

      .hero {
        padding: 60px 0 80px;
      }

      .h1-seo {
        font-size: 26px;
      }

      .footer-bottom {
        flex-direction: column;
        text-align: center;
      }
    }