/* Base and Color System */
    :root {
      --primary: #10B981;       /* Brand Bright Green */
      --primary-hover: #059669; /* Darker Green */
      --primary-light: #ECFDF5; /* Soft light green */
      --dark: #0F172A;          /* Slate Dark (Primary text) */
      --dark-light: #1E293B;    /* Secondary text */
      --muted: #64748B;         /* Muted gray text */
      --bg-white: #FFFFFF;
      --bg-light: #F8FAFC;      /* Background light gray */
      --border: #E2E8F0;
      --shadow-sm: 0 1px 3px rgba(0,0,0,0.1);
      --shadow-md: 0 4px 6px -1px rgba(0,0,0,0.05), 0 2px 4px -1px rgba(0,0,0,0.03);
      --shadow-lg: 0 10px 15px -3px rgba(16, 185, 129, 0.1), 0 4px 6px -2px rgba(16, 185, 129, 0.05);
      --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    }

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

    html {
      scroll-behavior: smooth;
      font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, "Noto Sans CJK SC", sans-serif;
      color: var(--dark);
      background-color: var(--bg-white);
      line-height: 1.6;
    }

    body {
      overflow-x: hidden;
    }

    /* Common Layout & Container */
    .container {
      width: 100%;
      max-width: 1200px;
      margin-left: auto;
      margin-right: auto;
      padding-left: 20px;
      padding-right: 20px;
    }

    section {
      padding: 80px 0;
      border-bottom: 1px solid var(--border);
    }

    section.bg-alt {
      background-color: var(--bg-light);
    }

    .section-title {
      text-align: center;
      margin-bottom: 50px;
    }

    .section-title h2 {
      font-size: 2.2rem;
      color: var(--dark);
      font-weight: 800;
      position: relative;
      display: inline-block;
      padding-bottom: 15px;
    }

    .section-title h2::after {
      content: '';
      position: absolute;
      bottom: 0;
      left: 50%;
      transform: translateX(-50%);
      width: 60px;
      height: 4px;
      background-color: var(--primary);
      border-radius: 2px;
    }

    .section-title p {
      color: var(--muted);
      margin-top: 15px;
      font-size: 1.1rem;
    }

    /* Buttons */
    .btn {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      padding: 12px 28px;
      font-size: 1rem;
      font-weight: 600;
      border-radius: 8px;
      transition: var(--transition);
      cursor: pointer;
      text-decoration: none;
      border: 2px solid transparent;
    }

    .btn-primary {
      background-color: var(--primary);
      color: var(--bg-white);
    }

    .btn-primary:hover {
      background-color: var(--primary-hover);
      transform: translateY(-2px);
      box-shadow: 0 4px 12px rgba(16, 185, 129, 0.3);
    }

    .btn-outline {
      background-color: transparent;
      border-color: var(--primary);
      color: var(--primary);
    }

    .btn-outline:hover {
      background-color: var(--primary-light);
      transform: translateY(-2px);
    }

    /* Grid helper */
    .grid-2 {
      display: grid;
      grid-template-columns: repeat(2, 1fr);
      gap: 30px;
    }

    .grid-3 {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 30px;
    }

    .grid-4 {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 20px;
    }

    /* Header Nav */
    header {
      position: sticky;
      top: 0;
      z-index: 1000;
      background-color: rgba(255, 255, 255, 0.95);
      border-bottom: 1px solid var(--border);
      backdrop-filter: blur(10px);
    }

    .nav-container {
      display: flex;
      justify-content: space-between;
      align-items: center;
      height: 80px;
    }

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

    .logo-area .ai-page-logo {
      height: 40px;
      width: auto;
    }

    .logo-text {
      font-size: 1.4rem;
      font-weight: 800;
      color: var(--dark);
      letter-spacing: 1px;
    }

    .logo-text span {
      color: var(--primary);
    }

    .nav-menu {
      display: flex;
      gap: 20px;
      list-style: none;
      align-items: center;
    }

    .nav-link {
      text-decoration: none;
      color: var(--dark-light);
      font-weight: 500;
      font-size: 0.95rem;
      transition: var(--transition);
      padding: 8px 12px;
      border-radius: 4px;
    }

    .nav-link:hover {
      color: var(--primary);
      background-color: var(--primary-light);
    }

    /* Mobile Menu Toggle */
    .menu-toggle {
      display: none;
      flex-direction: column;
      gap: 6px;
      background: none;
      border: none;
      cursor: pointer;
    }

    .menu-toggle span {
      display: block;
      width: 25px;
      height: 3px;
      background-color: var(--dark);
      transition: var(--transition);
    }

    /* 1. Hero First Fold (NO IMAGES) */
    .hero-section {
      padding: 100px 0 120px 0;
      background: linear-gradient(135deg, var(--bg-light) 0%, #FFFFFF 100%);
      position: relative;
      overflow: hidden;
      border-bottom: 1px solid var(--border);
    }

    /* Geometric decorative elements using pure CSS */
    .hero-bg-accent {
      position: absolute;
      top: -10%;
      right: -5%;
      width: 400px;
      height: 400px;
      background: radial-gradient(circle, rgba(16, 185, 129, 0.08) 0%, transparent 70%);
      pointer-events: none;
      z-index: 1;
    }

    .hero-content {
      position: relative;
      z-index: 2;
      max-width: 800px;
      margin: 0 auto;
      text-align: center;
    }

    .hero-badge {
      display: inline-block;
      background-color: var(--primary-light);
      color: var(--primary);
      padding: 6px 16px;
      border-radius: 50px;
      font-size: 0.9rem;
      font-weight: 600;
      margin-bottom: 24px;
      border: 1px solid rgba(16, 185, 129, 0.2);
    }

    .hero-content h1 {
      font-size: 3rem;
      font-weight: 800;
      line-height: 1.25;
      color: var(--dark);
      margin-bottom: 24px;
      letter-spacing: -0.5px;
    }

    .hero-content h1 span {
      color: var(--primary);
    }

    .hero-desc {
      font-size: 1.2rem;
      color: var(--muted);
      margin-bottom: 40px;
      line-height: 1.7;
    }

    .hero-btns {
      display: flex;
      justify-content: center;
      gap: 16px;
      margin-bottom: 50px;
    }

    /* 2. Hero Indicators (Stats) */
    .hero-stats {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 20px;
      max-width: 900px;
      margin: 0 auto;
      background-color: var(--bg-white);
      padding: 30px;
      border-radius: 16px;
      box-shadow: var(--shadow-lg);
      border: 1px solid var(--border);
    }

    .stat-item {
      text-align: center;
    }

    .stat-val {
      font-size: 2.2rem;
      font-weight: 800;
      color: var(--primary);
      margin-bottom: 4px;
    }

    .stat-label {
      font-size: 0.85rem;
      color: var(--muted);
      font-weight: 600;
    }

    /* 2. About Us */
    .about-grid {
      align-items: center;
    }

    .about-text h3 {
      font-size: 1.8rem;
      font-weight: 700;
      margin-bottom: 20px;
      color: var(--dark);
    }

    .about-text p {
      color: var(--dark-light);
      margin-bottom: 16px;
      font-size: 1.05rem;
    }

    .about-features {
      list-style: none;
      margin-top: 24px;
    }

    .about-features li {
      display: flex;
      align-items: center;
      gap: 10px;
      margin-bottom: 12px;
      font-weight: 600;
      color: var(--dark);
    }

    .about-features li::before {
      content: "✓";
      color: var(--primary);
      font-weight: bold;
      font-size: 1.2rem;
    }

    /* 3. Service System */
    .service-card {
      background-color: var(--bg-white);
      padding: 40px 30px;
      border-radius: 12px;
      border: 1px solid var(--border);
      transition: var(--transition);
      position: relative;
      overflow: hidden;
    }

    .service-card::before {
      content: '';
      position: absolute;
      top: 0;
      left: 0;
      width: 100%;
      height: 4px;
      background-color: var(--primary);
      transform: scaleX(0);
      transform-origin: left;
      transition: var(--transition);
    }

    .service-card:hover::before {
      transform: scaleX(1);
    }

    .service-card:hover {
      transform: translateY(-8px);
      box-shadow: var(--shadow-lg);
      border-color: var(--primary);
    }

    .service-icon {
      font-size: 2.5rem;
      margin-bottom: 20px;
    }

    .service-card h3 {
      font-size: 1.3rem;
      margin-bottom: 12px;
      color: var(--dark);
    }

    .service-card p {
      font-size: 0.95rem;
      color: var(--muted);
      margin-bottom: 16px;
    }

    .service-tag {
      display: inline-block;
      font-size: 0.8rem;
      background-color: var(--bg-light);
      padding: 3px 10px;
      border-radius: 4px;
      color: var(--primary);
      font-weight: 600;
    }

    /* 4. AIGC Workflow */
    .process-container {
      display: flex;
      flex-direction: column;
      gap: 40px;
      position: relative;
    }

    .process-step {
      display: flex;
      align-items: center;
      gap: 50px;
    }

    .process-step:nth-child(even) {
      flex-direction: row-reverse;
    }

    .process-num {
      font-size: 6rem;
      font-weight: 900;
      color: rgba(16, 185, 129, 0.15);
      line-height: 1;
      width: 120px;
      text-align: center;
    }

    .process-detail {
      flex: 1;
    }

    .process-detail h3 {
      font-size: 1.5rem;
      margin-bottom: 10px;
      color: var(--dark);
    }

    .process-detail p {
      color: var(--muted);
    }

    /* 5. Industry Solutions */
    .sol-tab-container {
      display: flex;
      flex-direction: column;
      gap: 30px;
    }

    .sol-tabs {
      display: flex;
      justify-content: center;
      gap: 12px;
      flex-wrap: wrap;
    }

    .sol-tab-btn {
      padding: 10px 20px;
      border: 1px solid var(--border);
      border-radius: 8px;
      background-color: var(--bg-white);
      color: var(--dark-light);
      cursor: pointer;
      font-weight: 600;
      transition: var(--transition);
    }

    .sol-tab-btn.active, .sol-tab-btn:hover {
      background-color: var(--primary);
      color: var(--bg-white);
      border-color: var(--primary);
    }

    .sol-pane {
      display: none;
      background-color: var(--bg-white);
      padding: 40px;
      border-radius: 12px;
      border: 1px solid var(--border);
      box-shadow: var(--shadow-sm);
    }

    .sol-pane.active {
      display: block;
      animation: fadeIn 0.4s ease-in-out;
    }

    /* 6. Service Network */
    .network-grid {
      align-items: center;
    }

    .network-list {
      display: grid;
      grid-template-columns: repeat(2, 1fr);
      gap: 20px;
    }

    .network-card {
      background-color: var(--bg-white);
      padding: 20px;
      border-radius: 8px;
      border: 1px solid var(--border);
    }

    .network-card h4 {
      color: var(--primary);
      margin-bottom: 8px;
      font-size: 1.1rem;
    }

    .network-card p {
      font-size: 0.9rem;
      color: var(--muted);
    }

    /* 7. Standard Delivery Flow & 8. Technical Standards */
    .table-container {
      overflow-x: auto;
      margin-top: 30px;
      border-radius: 12px;
      border: 1px solid var(--border);
    }

    table {
      width: 100%;
      border-collapse: collapse;
      text-align: left;
      min-width: 600px;
    }

    th, td {
      padding: 16px 20px;
      border-bottom: 1px solid var(--border);
    }

    th {
      background-color: var(--primary-light);
      color: var(--dark);
      font-weight: 700;
    }

    tr:last-child td {
      border-bottom: none;
    }

    /* 9. Case Center */
    .case-card {
      background-color: var(--bg-white);
      border-radius: 12px;
      overflow: hidden;
      border: 1px solid var(--border);
      transition: var(--transition);
    }

    .case-card:hover {
      transform: translateY(-6px);
      box-shadow: var(--shadow-lg);
    }

    .case-img-container {
      background-color: var(--bg-light);
      height: 200px;
      display: flex;
      align-items: center;
      justify-content: center;
      overflow: hidden;
    }

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

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

    .case-info {
      padding: 24px;
    }

    .case-tag {
      color: var(--primary);
      font-size: 0.85rem;
      font-weight: 700;
      text-transform: uppercase;
      margin-bottom: 8px;
      display: block;
    }

    .case-info h3 {
      font-size: 1.25rem;
      margin-bottom: 10px;
      color: var(--dark);
    }

    .case-info p {
      font-size: 0.9rem;
      color: var(--muted);
    }

    /* 10. Evaluation section */
    .eval-highlight {
      background-color: var(--primary-light);
      border: 2px solid var(--primary);
      padding: 30px;
      border-radius: 12px;
      text-align: center;
      margin-bottom: 40px;
    }

    .eval-score {
      font-size: 4rem;
      font-weight: 900;
      color: var(--primary);
      line-height: 1.1;
    }

    .eval-stars {
      color: #FBBF24;
      font-size: 1.8rem;
      margin: 10px 0;
    }

    .eval-label {
      font-weight: 700;
      font-size: 1.2rem;
      color: var(--dark);
    }

    /* 11. Match Form */
    .form-box {
      max-width: 700px;
      margin: 0 auto;
      background-color: var(--bg-white);
      padding: 40px;
      border-radius: 16px;
      border: 1px solid var(--border);
      box-shadow: var(--shadow-lg);
    }

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

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

    .form-control {
      width: 100%;
      padding: 12px 16px;
      border: 1px solid var(--border);
      border-radius: 8px;
      font-size: 1rem;
      transition: var(--transition);
      background-color: var(--bg-light);
    }

    .form-control:focus {
      outline: none;
      border-color: var(--primary);
      background-color: var(--bg-white);
      box-shadow: 0 0 0 3px rgba(16, 185, 129, 0.15);
    }

    /* 12. Token price comparison */
    .badge-tag {
      background-color: var(--primary-light);
      color: var(--primary);
      padding: 2px 8px;
      border-radius: 4px;
      font-size: 0.75rem;
      font-weight: 700;
      display: inline-block;
    }

    /* 13. Vocational & AI Training */
    .training-card {
      background-color: var(--bg-white);
      border: 1px solid var(--border);
      border-radius: 12px;
      padding: 30px;
      transition: var(--transition);
    }

    .training-card:hover {
      border-color: var(--primary);
      box-shadow: var(--shadow-md);
      transform: translateY(-4px);
    }

    .training-icon {
      font-size: 2.2rem;
      color: var(--primary);
      margin-bottom: 16px;
    }

    .training-card h3 {
      font-size: 1.25rem;
      margin-bottom: 12px;
    }

    /* 15. FAQ Accordion (Help Center) */
    .faq-container {
      max-width: 800px;
      margin: 0 auto;
      display: flex;
      flex-direction: column;
      gap: 15px;
    }

    .faq-item {
      background-color: var(--bg-white);
      border: 1px solid var(--border);
      border-radius: 8px;
      overflow: hidden;
      transition: var(--transition);
    }

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

    .faq-header::after {
      content: '+';
      font-size: 1.4rem;
      color: var(--primary);
      transition: var(--transition);
    }

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

    .faq-body {
      max-height: 0;
      overflow: hidden;
      transition: max-height 0.3s ease-out;
      background-color: var(--bg-light);
    }

    .faq-content {
      padding: 20px 24px;
      color: var(--dark-light);
      border-top: 1px solid var(--border);
      font-size: 0.95rem;
    }

    /* 17. Self Troubleshoot & 18. Glossary terms */
    .glossary-grid {
      display: grid;
      grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
      gap: 15px;
    }

    .glossary-card {
      background-color: var(--bg-white);
      padding: 16px;
      border: 1px solid var(--border);
      border-radius: 8px;
      text-align: center;
    }

    .glossary-card h4 {
      color: var(--primary);
      margin-bottom: 6px;
    }

    /* 19. Articles list */
    .article-list {
      display: flex;
      flex-direction: column;
      gap: 16px;
    }

    .article-item {
      display: flex;
      justify-content: space-between;
      align-items: center;
      background-color: var(--bg-white);
      padding: 16px 24px;
      border-radius: 8px;
      border: 1px solid var(--border);
      transition: var(--transition);
    }

    .article-item:hover {
      border-color: var(--primary);
      transform: translateX(4px);
    }

    .article-item a {
      color: var(--dark);
      text-decoration: none;
      font-weight: 600;
      font-size: 1rem;
    }

    .article-item a:hover {
      color: var(--primary);
    }

    .article-date {
      color: var(--muted);
      font-size: 0.85rem;
    }

    /* Reviews block */
    .reviews-grid {
      margin-top: 40px;
    }

    .review-card {
      background-color: var(--bg-white);
      border: 1px solid var(--border);
      border-radius: 12px;
      padding: 24px;
      box-shadow: var(--shadow-sm);
    }

    .review-user {
      display: flex;
      align-items: center;
      gap: 12px;
      margin-bottom: 16px;
    }

    .user-avatar {
      width: 48px;
      height: 48px;
      border-radius: 50%;
      background-color: var(--primary-light);
      display: flex;
      align-items: center;
      justify-content: center;
      font-weight: 800;
      color: var(--primary);
    }

    .user-meta h4 {
      font-size: 0.95rem;
      color: var(--dark);
    }

    .user-meta span {
      font-size: 0.8rem;
      color: var(--muted);
    }

    .review-text {
      font-size: 0.9rem;
      color: var(--dark-light);
      font-style: italic;
    }

    /* 20. Contact us details & Footer */
    .contact-wrapper {
      grid-template-columns: 1fr 1.5fr;
    }

    .contact-info {
      display: flex;
      flex-direction: column;
      gap: 24px;
    }

    .contact-method {
      display: flex;
      align-items: flex-start;
      gap: 16px;
    }

    .contact-method-icon {
      font-size: 1.5rem;
      color: var(--primary);
      background-color: var(--primary-light);
      padding: 10px;
      border-radius: 8px;
      line-height: 1;
    }

    .contact-method-details h4 {
      font-size: 1rem;
      margin-bottom: 4px;
    }

    .contact-method-details p, .contact-method-details a {
      color: var(--muted);
      font-size: 0.95rem;
      text-decoration: none;
    }

    .contact-qr-container {
      display: flex;
      gap: 20px;
      margin-top: 20px;
      flex-wrap: wrap;
    }

    .qr-card {
      background-color: var(--bg-white);
      padding: 12px;
      border: 1px solid var(--border);
      border-radius: 8px;
      text-align: center;
      width: 140px;
    }

    .qr-card img {
      width: 100%;
      height: auto;
      border-radius: 4px;
      margin-bottom: 8px;
    }

    .qr-card span {
      font-size: 0.75rem;
      color: var(--dark-light);
      font-weight: 600;
    }

    /* Footer & Copyrights */
    footer {
      background-color: var(--dark);
      color: #94A3B8;
      padding: 60px 0 30px 0;
      font-size: 0.9rem;
    }

    .footer-grid {
      display: grid;
      grid-template-columns: 2fr 1fr 1.5fr;
      gap: 50px;
      margin-bottom: 40px;
    }

    .footer-brand h3 {
      color: var(--bg-white);
      margin-bottom: 16px;
      font-size: 1.4rem;
    }

    .footer-links h4, .footer-contact h4 {
      color: var(--bg-white);
      margin-bottom: 16px;
      font-size: 1rem;
      position: relative;
      padding-bottom: 8px;
    }

    .footer-links h4::after, .footer-contact h4::after {
      content: '';
      position: absolute;
      bottom: 0;
      left: 0;
      width: 30px;
      height: 2px;
      background-color: var(--primary);
    }

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

    .footer-links li {
      margin-bottom: 10px;
    }

    .footer-links a {
      color: #94A3B8;
      text-decoration: none;
      transition: var(--transition);
    }

    .footer-links a:hover {
      color: var(--primary);
      padding-left: 4px;
    }

    .footer-bottom {
      border-top: 1px solid #334155;
      padding-top: 30px;
      text-align: center;
      font-size: 0.8rem;
    }

    .friend-links {
      display: flex;
      flex-wrap: wrap;
      justify-content: center;
      gap: 15px;
      margin-bottom: 20px;
    }

    .friend-links a {
      color: #94A3B8;
      text-decoration: none;
      transition: var(--transition);
    }

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

    /* Float widgets */
    .float-widgets {
      position: fixed;
      right: 20px;
      bottom: 20px;
      z-index: 999;
      display: flex;
      flex-direction: column;
      gap: 10px;
    }

    .float-btn {
      width: 50px;
      height: 50px;
      background-color: var(--bg-white);
      border: 1px solid var(--border);
      border-radius: 50%;
      display: flex;
      align-items: center;
      justify-content: center;
      cursor: pointer;
      box-shadow: var(--shadow-md);
      transition: var(--transition);
      position: relative;
    }

    .float-btn:hover {
      background-color: var(--primary);
      color: var(--bg-white);
    }

    .float-btn svg {
      width: 24px;
      height: 24px;
      fill: currentColor;
    }

    .float-btn:hover svg {
      fill: var(--bg-white);
    }

    .qr-hover-box {
      position: absolute;
      bottom: 60px;
      right: 0;
      background-color: var(--bg-white);
      border: 1px solid var(--border);
      padding: 15px;
      border-radius: 8px;
      box-shadow: var(--shadow-lg);
      display: none;
      width: 160px;
      text-align: center;
    }

    .qr-hover-box img {
      width: 100%;
      height: auto;
      margin-bottom: 6px;
    }

    .qr-hover-box span {
      font-size: 0.75rem;
      color: var(--dark);
    }

    .float-btn:hover .qr-hover-box {
      display: block;
    }

    /* Animation utils */
    @keyframes fadeIn {
      from { opacity: 0; transform: translateY(10px); }
      to { opacity: 1; transform: translateY(0); }
    }

    /* Responsive adjustments */
    @media (max-width: 1024px) {
      .grid-4 {
        grid-template-columns: repeat(2, 1fr);
      }
      .grid-3 {
        grid-template-columns: repeat(2, 1fr);
      }
      .footer-grid {
        grid-template-columns: 1fr;
        gap: 30px;
      }
    }

    @media (max-width: 768px) {
      .grid-2, .grid-3, .grid-4, .contact-wrapper {
        grid-template-columns: 1fr;
      }
      
      .menu-toggle {
        display: flex;
      }

      .nav-menu {
        position: absolute;
        top: 80px;
        left: 0;
        right: 0;
        background-color: var(--bg-white);
        flex-direction: column;
        padding: 20px;
        gap: 15px;
        border-bottom: 1px solid var(--border);
        box-shadow: var(--shadow-md);
        display: none;
      }

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

      .hero-content h1 {
        font-size: 2rem;
      }

      .hero-stats {
        grid-template-columns: repeat(2, 1fr);
      }

      .process-step, .process-step:nth-child(even) {
        flex-direction: column;
        align-items: flex-start;
        gap: 15px;
      }

      .process-num {
        text-align: left;
        width: auto;
        font-size: 4rem;
      }
    }