/* Global Resets & Typography */
    :root {
      --bg-main: #f8fafc;
      --bg-card: #ffffff;
      --text-main: #0f172a;
      --text-muted: #475569;
      --neon-cyan: #00e5ff;
      --neon-purple: #7c3aed;
      --neon-pink: #ec4899;
      --neon-gradient: linear-gradient(135deg, #00c6ff 0%, #0072ff 50%, #7c3aed 100%);
      --neon-glow: 0 0 20px rgba(0, 198, 255, 0.25);
      --border-light: #e2e8f0;
      --radius-sm: 8px;
      --radius-md: 14px;
      --radius-lg: 20px;
      --max-width: 1200px;
      --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    }

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

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

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

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

    /* Header & Navigation */
    .site-header {
      position: sticky;
      top: 0;
      z-index: 1000;
      background: rgba(255, 255, 255, 0.92);
      backdrop-filter: blur(12px);
      border-bottom: 1px solid rgba(226, 232, 240, 0.8);
      box-shadow: 0 4px 20px rgba(0, 0, 0, 0.03);
    }

    .header-inner {
      display: flex;
      align-items: center;
      justify-content: space-between;
      height: 72px;
    }

    .brand-wrap {
      display: flex;
      align-items: center;
      gap: 12px;
    }

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

    .ai-page-home-link {
      font-weight: 600;
      color: var(--text-main);
      padding: 4px 10px;
      border-radius: var(--radius-sm);
      background: #f1f5f9;
      font-size: 0.9rem;
      transition: var(--transition);
    }

    .ai-page-home-link:hover {
      background: #e2e8f0;
      color: var(--neon-purple);
    }

    /* MANDATORY CONSTRAINT: .nav-links gap must be 0 */
    .nav-links {
      display: flex;
      align-items: center;
      gap: 0;
      list-style: none;
    }

    .nav-links li a {
      display: block;
      padding: 8px 14px;
      font-size: 0.93rem;
      font-weight: 500;
      color: var(--text-muted);
      transition: var(--transition);
      border-radius: var(--radius-sm);
    }

    .nav-links li a:hover {
      color: #0284c7;
      background: rgba(0, 198, 255, 0.06);
    }

    .header-cta {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      padding: 10px 22px;
      background: var(--neon-gradient);
      color: #ffffff;
      font-weight: 600;
      font-size: 0.92rem;
      border-radius: 50px;
      box-shadow: var(--neon-glow);
      transition: var(--transition);
    }

    .header-cta:hover {
      transform: translateY(-2px);
      box-shadow: 0 6px 25px rgba(0, 114, 255, 0.4);
    }

    .mobile-menu-btn {
      display: none;
      background: none;
      border: none;
      font-size: 1.5rem;
      color: var(--text-main);
      cursor: pointer;
    }

    /* Hero Section (No Images Rule Strictly Observed) */
    .hero-section {
      position: relative;
      padding: 90px 0 70px;
      background: radial-gradient(circle at 50% 20%, rgba(0, 229, 255, 0.12) 0%, rgba(124, 58, 237, 0.05) 50%, rgba(248, 250, 252, 0) 100%);
      overflow: hidden;
      text-align: center;
    }

    .hero-badge {
      display: inline-flex;
      align-items: center;
      gap: 8px;
      padding: 6px 18px;
      background: rgba(255, 255, 255, 0.9);
      border: 1px solid rgba(0, 198, 255, 0.4);
      border-radius: 50px;
      font-size: 0.88rem;
      font-weight: 600;
      color: #0284c7;
      box-shadow: 0 2px 12px rgba(0, 198, 255, 0.12);
      margin-bottom: 24px;
    }

    .hero-title {
      font-size: 2.8rem;
      font-weight: 800;
      letter-spacing: -0.5px;
      color: var(--text-main);
      margin-bottom: 20px;
      line-height: 1.25;
    }

    .hero-title span {
      background: var(--neon-gradient);
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
    }

    .hero-subtitle {
      max-width: 820px;
      margin: 0 auto 36px;
      font-size: 1.15rem;
      color: var(--text-muted);
      line-height: 1.7;
    }

    .hero-actions {
      display: flex;
      align-items: center;
      justify-content: center;
      gap: 16px;
      margin-bottom: 50px;
      flex-wrap: wrap;
    }

    .btn-primary {
      padding: 14px 34px;
      background: var(--neon-gradient);
      color: #ffffff;
      font-weight: 700;
      font-size: 1.05rem;
      border-radius: 50px;
      box-shadow: 0 8px 30px rgba(0, 114, 255, 0.35);
      transition: var(--transition);
      border: none;
      cursor: pointer;
    }

    .btn-primary:hover {
      transform: translateY(-3px);
      box-shadow: 0 12px 35px rgba(0, 114, 255, 0.45);
    }

    .btn-secondary {
      padding: 14px 30px;
      background: #ffffff;
      color: var(--text-main);
      font-weight: 600;
      font-size: 1rem;
      border-radius: 50px;
      border: 1px solid var(--border-light);
      box-shadow: 0 4px 15px rgba(0, 0, 0, 0.04);
      transition: var(--transition);
    }

    .btn-secondary:hover {
      border-color: #00c6ff;
      color: #0284c7;
      transform: translateY(-2px);
    }

    .hero-stats {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 20px;
      max-width: 960px;
      margin: 0 auto;
    }

    .stat-card {
      background: #ffffff;
      padding: 22px 16px;
      border-radius: var(--radius-md);
      border: 1px solid var(--border-light);
      box-shadow: 0 4px 20px rgba(0, 0, 0, 0.03);
      transition: var(--transition);
    }

    .stat-card:hover {
      border-color: rgba(0, 198, 255, 0.5);
      transform: translateY(-4px);
      box-shadow: 0 8px 25px rgba(0, 198, 255, 0.12);
    }

    .stat-number {
      font-size: 1.9rem;
      font-weight: 800;
      color: #0284c7;
      margin-bottom: 4px;
    }

    .stat-label {
      font-size: 0.88rem;
      color: var(--text-muted);
      font-weight: 500;
    }

    /* Section Components Base */
    .section-block {
      padding: 80px 0;
      position: relative;
    }

    .section-block-alt {
      background-color: #ffffff;
    }

    .section-header {
      text-align: center;
      max-width: 760px;
      margin: 0 auto 50px;
    }

    .section-tag {
      display: inline-block;
      font-size: 0.85rem;
      font-weight: 700;
      text-transform: uppercase;
      letter-spacing: 1px;
      color: #7c3aed;
      background: rgba(124, 58, 237, 0.08);
      padding: 4px 14px;
      border-radius: 20px;
      margin-bottom: 12px;
    }

    .section-title {
      font-size: 2.1rem;
      font-weight: 800;
      color: var(--text-main);
      margin-bottom: 14px;
      line-height: 1.3;
    }

    .section-desc {
      font-size: 1.02rem;
      color: var(--text-muted);
    }

    /* Platform Overview & Ecosystem */
    .platform-intro-grid {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 40px;
      align-items: center;
    }

    .intro-text-box {
      background: #ffffff;
      padding: 36px;
      border-radius: var(--radius-lg);
      border: 1px solid var(--border-light);
      box-shadow: 0 10px 30px rgba(0, 0, 0, 0.03);
    }

    .intro-text-box h3 {
      font-size: 1.5rem;
      margin-bottom: 16px;
      color: var(--text-main);
    }

    .intro-text-box p {
      color: var(--text-muted);
      margin-bottom: 16px;
      line-height: 1.7;
    }

    .model-tags-wrapper {
      background: #ffffff;
      padding: 30px;
      border-radius: var(--radius-lg);
      border: 1px solid var(--border-light);
      box-shadow: 0 10px 30px rgba(0, 0, 0, 0.03);
    }

    .model-tags-wrapper h4 {
      font-size: 1.1rem;
      margin-bottom: 18px;
      color: var(--text-main);
    }

    .model-tags {
      display: flex;
      flex-wrap: wrap;
      gap: 10px;
    }

    .model-chip {
      padding: 6px 14px;
      background: #f1f5f9;
      border-radius: 20px;
      font-size: 0.85rem;
      font-weight: 600;
      color: #334155;
      border: 1px solid #e2e8f0;
      transition: var(--transition);
    }

    .model-chip:hover {
      background: #00c6ff;
      color: #ffffff;
      border-color: #00c6ff;
      transform: translateY(-2px);
    }

    /* AIGC Services Cards Grid */
    .services-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 24px;
    }

    .service-card {
      background: #ffffff;
      border-radius: var(--radius-md);
      padding: 28px;
      border: 1px solid var(--border-light);
      transition: var(--transition);
      display: flex;
      flex-direction: column;
      height: 100%;
    }

    .service-card:hover {
      transform: translateY(-5px);
      box-shadow: 0 12px 30px rgba(0, 198, 255, 0.15);
      border-color: rgba(0, 198, 255, 0.5);
    }

    .service-icon {
      width: 48px;
      height: 48px;
      border-radius: 12px;
      background: rgba(0, 198, 255, 0.1);
      color: #0284c7;
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 1.4rem;
      font-weight: bold;
      margin-bottom: 18px;
    }

    .service-card h3 {
      font-size: 1.2rem;
      font-weight: 700;
      margin-bottom: 10px;
      color: var(--text-main);
    }

    .service-card p {
      font-size: 0.94rem;
      color: var(--text-muted);
      line-height: 1.6;
      flex-grow: 1;
    }

    /* Process Timeline */
    .process-steps {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 20px;
      position: relative;
    }

    .step-item {
      background: #ffffff;
      padding: 30px 20px;
      border-radius: var(--radius-md);
      border: 1px solid var(--border-light);
      text-align: center;
      position: relative;
    }

    .step-num {
      width: 42px;
      height: 42px;
      border-radius: 50%;
      background: var(--neon-gradient);
      color: #fff;
      font-weight: 800;
      display: flex;
      align-items: center;
      justify-content: center;
      margin: 0 auto 16px;
      font-size: 1.1rem;
    }

    .step-item h3 {
      font-size: 1.1rem;
      margin-bottom: 8px;

    }

    .step-item p {
      font-size: 0.88rem;
      color: var(--text-muted);
    }

    /* Comparison Table & Rating */
    .review-score-banner {
      background: linear-gradient(135deg, #0f172a 0%, #1e293b 100%);
      color: #ffffff;
      border-radius: var(--radius-lg);
      padding: 36px;
      display: flex;
      align-items: center;
      justify-content: space-between;
      margin-bottom: 30px;
      box-shadow: 0 10px 30px rgba(15, 23, 42, 0.15);
    }

    .score-info h3 {
      font-size: 1.8rem;
      margin-bottom: 6px;
    }

    .score-info p {
      color: #94a3b8;
      font-size: 0.95rem;
    }

    .score-badge-box {
      text-align: right;
    }

    .score-number {
      font-size: 3rem;
      font-weight: 900;
      color: #00e5ff;
      line-height: 1;
    }

    .score-stars {
      color: #fbbf24;
      font-size: 1.3rem;
      margin-top: 4px;
    }

    .table-container {
      width: 100%;
      overflow-x: auto;
      background: #ffffff;
      border-radius: var(--radius-md);
      border: 1px solid var(--border-light);
      box-shadow: 0 4px 20px rgba(0, 0, 0, 0.02);
    }

    .compare-table {
      width: 100%;
      border-collapse: collapse;
      text-align: left;
      min-width: 650px;
    }

    .compare-table th,
    .compare-table td {
      padding: 16px 20px;
      border-bottom: 1px solid var(--border-light);
      font-size: 0.94rem;
    }

    .compare-table th {
      background: #f8fafc;
      font-weight: 700;
      color: var(--text-main);
    }

    .compare-table tr.highlight {
      background: rgba(0, 198, 255, 0.04);
    }

    .compare-table tr.highlight td {
      font-weight: 600;
      color: #0284c7;
    }

    /* Cases Grid */
    .cases-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 24px;
    }

    .case-card {
      background: #ffffff;
      border-radius: var(--radius-md);
      overflow: hidden;
      border: 1px solid var(--border-light);
      transition: var(--transition);
    }

    .case-card:hover {
      transform: translateY(-4px);
      box-shadow: 0 12px 30px rgba(0, 0, 0, 0.08);
    }

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

    .ai-page-image {
      width: 100%;
      height: 100%;
      object-fit: cover;
      display: block;
      transition: transform 0.5s ease;
    }

    .case-card:hover .ai-page-image {
      transform: scale(1.05);
    }

    .case-content {
      padding: 20px;
    }

    .case-content h3 {
      font-size: 1.1rem;
      margin-bottom: 8px;
      color: var(--text-main);
    }

    .case-content p {
      font-size: 0.88rem;
      color: var(--text-muted);
    }

    /* Testimonials / User Reviews */
    .reviews-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 24px;
    }

    .review-card {
      background: #ffffff;
      padding: 28px;
      border-radius: var(--radius-md);
      border: 1px solid var(--border-light);
      box-shadow: 0 4px 20px rgba(0, 0, 0, 0.02);
      display: flex;
      flex-direction: column;
      justify-content: space-between;
    }

    .review-text {
      font-size: 0.94rem;
      color: var(--text-muted);
      line-height: 1.7;
      margin-bottom: 20px;
    }

    .reviewer-info {
      display: flex;
      align-items: center;
      gap: 12px;
    }

    .reviewer-avatar {
      width: 44px;
      height: 44px;
      border-radius: 50%;
      background: var(--neon-gradient);
      color: #fff;
      display: flex;
      align-items: center;
      justify-content: center;
      font-weight: bold;
      font-size: 1rem;
    }

    .reviewer-name {
      font-weight: 700;
      font-size: 0.95rem;
      color: var(--text-main);
    }

    .reviewer-role {
      font-size: 0.82rem;
      color: #64748b;
    }

    /* Token Pricing Reference Section */
    .token-grid {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 20px;
    }

    .token-card {
      background: #ffffff;
      padding: 24px;
      border-radius: var(--radius-md);
      border: 1px solid var(--border-light);
      text-align: center;
      transition: var(--transition);
    }

    .token-card:hover {
      border-color: #00c6ff;
      box-shadow: 0 8px 25px rgba(0, 198, 255, 0.12);
    }

    .token-model {
      font-weight: 700;
      font-size: 1.1rem;
      margin-bottom: 8px;
    }

    .token-price {
      font-size: 1.5rem;
      font-weight: 800;
      color: #7c3aed;
      margin-bottom: 6px;
    }

    .token-desc {
      font-size: 0.84rem;
      color: var(--text-muted);
    }

    /* FAQ Accordion */
    .faq-wrapper {
      max-width: 860px;
      margin: 0 auto;
      display: flex;
      flex-direction: column;
      gap: 14px;
    }

    .faq-item {
      background: #ffffff;
      border-radius: var(--radius-md);
      border: 1px solid var(--border-light);
      overflow: hidden;
      transition: var(--transition);
    }

    .faq-question {
      width: 100%;
      padding: 20px 24px;
      background: none;
      border: none;
      text-align: left;
      font-size: 1.05rem;
      font-weight: 700;
      color: var(--text-main);
      cursor: pointer;
      display: flex;
      justify-content: space-between;
      align-items: center;
    }

    .faq-icon {
      font-size: 1.2rem;
      transition: transform 0.3s ease;
      color: #0284c7;
    }

    .faq-answer {
      max-height: 0;
      overflow: hidden;
      transition: max-height 0.3s cubic-bezier(0, 1, 0, 1);
      padding: 0 24px;
      background: #f8fafc;
      color: var(--text-muted);
      font-size: 0.95rem;
      line-height: 1.7;
    }

    .faq-item.active .faq-answer {
      max-height: 300px;
      padding: 16px 24px 24px;
      transition: max-height 0.3s ease-in-out;
    }

    .faq-item.active .faq-icon {
      transform: rotate(45deg);
    }

    /* Form & Contact Section */
    .contact-grid {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 40px;
    }

    .contact-info-card {
      background: #ffffff;
      padding: 36px;
      border-radius: var(--radius-lg);
      border: 1px solid var(--border-light);
      box-shadow: 0 4px 25px rgba(0, 0, 0, 0.03);
    }

    .contact-info-card h3 {
      font-size: 1.5rem;
      margin-bottom: 20px;
    }

    .contact-list {
      list-style: none;
      display: flex;
      flex-direction: column;
      gap: 16px;
      margin-bottom: 30px;
    }

    .contact-list li {
      font-size: 0.95rem;
      color: var(--text-muted);
      display: flex;
      align-items: center;
      gap: 10px;
    }

    .contact-list strong {
      color: var(--text-main);
    }

    .qr-wrap {
      display: flex;
      align-items: center;
      gap: 16px;
      padding: 16px;
      background: #f8fafc;
      border-radius: var(--radius-md);
      border: 1px solid var(--border-light);
    }

    .qr-wrap img {
      width: 100px;
      height: 100px;
      object-fit: cover;
      border-radius: 8px;
    }

    .form-card {
      background: #ffffff;
      padding: 36px;
      border-radius: var(--radius-lg);
      border: 1px solid var(--border-light);
      box-shadow: 0 10px 30px rgba(0, 0, 0, 0.03);
    }

    .form-group {
      margin-bottom: 18px;
    }

    .form-group label {
      display: block;
      font-size: 0.9rem;
      font-weight: 600;
      margin-bottom: 6px;
      color: var(--text-main);
    }

    .form-control {
      width: 100%;
      padding: 12px 16px;
      border-radius: var(--radius-sm);
      border: 1px solid var(--border-light);
      font-size: 0.95rem;
      outline: none;
      transition: var(--transition);
    }

    .form-control:focus {
      border-color: #00c6ff;
      box-shadow: 0 0 0 3px rgba(0, 198, 255, 0.15);
    }

    textarea.form-control {
      resize: vertical;
      min-height: 100px;
    }

    /* Articles Section */
    .article-links-wrap {
      background: #ffffff;
      padding: 24px;
      border-radius: var(--radius-md);
      border: 1px solid var(--border-light);
    }

    .article-links-list {
      display: flex;
      flex-wrap: wrap;
      gap: 12px;
      list-style: none;
      margin-top: 16px;
    }

    .article-links-list a {
      display: inline-block;
      padding: 8px 16px;
      background: #f1f5f9;
      border-radius: var(--radius-sm);
      font-size: 0.88rem;
      color: #0284c7;
      transition: var(--transition);
    }

    .article-links-list a:hover {
      background: #00c6ff;
      color: #ffffff;
    }

    /* Footer & Friend Links */
    .site-footer {
      background: #0f172a;
      color: #94a3b8;
      padding: 60px 0 30px;
      border-top: 1fr solid #1e293b;
    }

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

    .footer-brand h4 {
      color: #ffffff;
      font-size: 1.3rem;
      margin-bottom: 14px;
    }

    .footer-brand p {
      font-size: 0.9rem;
      line-height: 1.6;
      max-width: 400px;
    }

    .footer-nav-col h5 {
      color: #ffffff;
      font-size: 1rem;
      margin-bottom: 16px;
    }

    .footer-nav-col ul {
      list-style: none;
      display: flex;
      flex-direction: column;
      gap: 10px;
    }

    .footer-nav-col ul a {
      font-size: 0.88rem;
      transition: var(--transition);
    }

    .footer-nav-col ul a:hover {
      color: #00e5ff;
    }

    .friend-links-box {
      border-top: 1px solid #1e293b;
      padding-top: 24px;
      margin-bottom: 24px;
    }

    .friend-links-box h5 {
      color: #e2e8f0;
      font-size: 0.92rem;
      margin-bottom: 12px;
    }

    .friend-links-flex {
      display: flex;
      flex-wrap: wrap;
      gap: 16px;
    }

    .friend-links-flex a {
      color: #94a3b8;
      font-size: 0.85rem;
      transition: var(--transition);
    }

    .friend-links-flex a:hover {
      color: #00e5ff;
    }

    .footer-bottom {
      border-top: 1px solid #1e293b;
      padding-top: 20px;
      text-align: center;
      font-size: 0.84rem;
    }

    /* Floating Widget */
    .float-widget {
      position: fixed;
      right: 20px;
      bottom: 30px;
      z-index: 999;
      display: flex;
      flex-direction: column;
      gap: 10px;
    }

    .float-btn {
      width: 48px;
      height: 48px;
      border-radius: 50%;
      background: var(--neon-gradient);
      color: #ffffff;
      display: flex;
      align-items: center;
      justify-content: center;
      box-shadow: 0 4px 15px rgba(0, 0, 0, 0.2);
      cursor: pointer;
      font-weight: bold;
      font-size: 0.85rem;
      transition: var(--transition);
    }

    .float-btn:hover {
      transform: scale(1.1);
    }

    /* Responsive Adjustments */
    @media (max-width: 992px) {
      .hero-title { font-size: 2.2rem; }
      .services-grid, .cases-grid, .reviews-grid { grid-template-columns: repeat(2, 1fr); }
      .hero-stats, .token-grid, .process-steps { grid-template-columns: repeat(2, 1fr); }
      .platform-intro-grid, .contact-grid { grid-template-columns: 1fr; }
      .footer-content { grid-template-columns: 1fr; }
    }

    @media (max-width: 768px) {
      .nav-links {
        display: none;
        position: absolute;
        top: 72px;
        left: 0;
        width: 100%;
        background: #ffffff;
        flex-direction: column;
        padding: 20px;
        box-shadow: 0 10px 20px rgba(0,0,0,0.1);
      }
      .nav-links.active { display: flex; }
      .mobile-menu-btn { display: block; }
      .hero-title { font-size: 1.8rem; }
      .services-grid, .cases-grid, .reviews-grid, .hero-stats, .token-grid, .process-steps { grid-template-columns: 1fr; }
      .review-score-banner { flex-direction: column; text-align: center; gap: 20px; }
      .score-badge-box { text-align: center; }
    }