/* -------------------------------------------------------------
       CSS Resets & Global Visual System (Light Neon Cyber Style)
    ------------------------------------------------------------- */
    :root {
      --bg-main: #f4f7fc;
      --bg-card: #ffffff;
      --bg-alt: #ebf0f9;
      --text-main: #0f172a;
      --text-muted: #475569;
      --text-light: #64748b;
      
      /* Neon Accents */
      --neon-cyan: #00d2ff;
      --neon-purple: #7928ca;
      --neon-pink: #ff007f;
      --neon-green: #10b981;
      --neon-gradient: linear-gradient(135deg, #7928ca 0%, #00d2ff 50%, #ff007f 100%);
      --neon-border: linear-gradient(135deg, rgba(121, 40, 202, 0.3), rgba(0, 210, 255, 0.3));
      
      --shadow-sm: 0 4px 6px -1px rgba(15, 23, 42, 0.05);
      --shadow-md: 0 10px 25px -5px rgba(121, 40, 202, 0.08);
      --shadow-neon: 0 0 20px rgba(0, 210, 255, 0.25);
      
      --radius-sm: 8px;
      --radius-md: 14px;
      --radius-lg: 20px;
      --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    }

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

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

    body {
      overflow-x: hidden;
      width: 100%;
    }

    a {
      color: inherit;
      text-decoration: none;
      transition: var(--transition);
    }

    img {
      max-width: 100%;
      height: auto;
      display: block;
    }

    /* Container Standard */
    .container {
      width: 100%;
      max-width: 1200px;
      margin: 0 auto;
      padding: 0 20px;
    }

    /* Typography Hierarchy */
    h1, h2, h3, h4 {
      color: var(--text-main);
      font-weight: 700;
      line-height: 1.3;
    }

    .section-head {
      text-align: center;
      margin-bottom: 45px;
    }

    .section-tag {
      display: inline-block;
      padding: 5px 16px;
      background: rgba(121, 40, 202, 0.08);
      border: 1px solid rgba(121, 40, 202, 0.2);
      color: var(--neon-purple);
      border-radius: 50px;
      font-size: 0.85rem;
      font-weight: 600;
      letter-spacing: 1px;
      margin-bottom: 12px;
      text-transform: uppercase;
    }

    .section-title {
      font-size: 2rem;
      position: relative;
      display: inline-block;
    }

    .section-desc {
      color: var(--text-muted);
      margin-top: 10px;
      font-size: 1rem;
      max-width: 700px;
      margin-left: auto;
      margin-right: auto;
    }

    /* Buttons */
    .btn {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      padding: 12px 28px;
      font-size: 0.95rem;
      font-weight: 600;
      border-radius: 50px;
      cursor: pointer;
      transition: var(--transition);
      border: none;
      outline: none;
      gap: 8px;
    }

    .btn-neon-primary {
      background: var(--neon-gradient);
      color: #ffffff;
      box-shadow: 0 4px 15px rgba(121, 40, 202, 0.3);
    }

    .btn-neon-primary:hover {
      transform: translateY(-2px);
      box-shadow: 0 8px 25px rgba(0, 210, 255, 0.5);
    }

    .btn-neon-outline {
      background: #ffffff;
      color: var(--text-main);
      border: 2px solid #e2e8f0;
      box-shadow: var(--shadow-sm);
    }

    .btn-neon-outline:hover {
      border-color: var(--neon-cyan);
      color: var(--neon-purple);
      transform: translateY(-2px);
      box-shadow: var(--shadow-neon);
    }

    /* -------------------------------------------------------------
       Header & Navigation
    ------------------------------------------------------------- */
    .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);
      padding: 14px 0;
    }

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

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

    .ai-page-logo {
      height: 38px;
      width: auto;
      object-fit: contain;
    }

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

    .nav-links li a {
      padding: 8px 14px;
      font-size: 0.9rem;
      font-weight: 500;
      color: var(--text-muted);
      border-radius: 6px;
    }

    .nav-links li a:hover,
    .nav-links li a.active {
      color: var(--neon-purple);
      background: rgba(121, 40, 202, 0.05);
    }

    .header-actions {
      display: flex;
      align-items: center;
      gap: 12px;
    }

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

    /* -------------------------------------------------------------
       Hero Section (Strict Rules: NO IMAGES in Hero)
    ------------------------------------------------------------- */
    .hero {
      padding: 70px 0 60px;
      background: radial-gradient(circle at 50% 20%, rgba(0, 210, 255, 0.08) 0%, rgba(121, 40, 202, 0.05) 40%, rgba(244, 247, 252, 0) 70%);
      text-align: center;
      position: relative;
    }

    .hero-badge-group {
      display: flex;
      justify-content: center;
      gap: 10px;
      flex-wrap: wrap;
      margin-bottom: 20px;
    }

    .hero-badge {
      font-size: 0.8rem;
      padding: 4px 12px;
      border-radius: 20px;
      background: #ffffff;
      border: 1px solid rgba(0, 210, 255, 0.4);
      color: var(--text-main);
      box-shadow: 0 2px 8px rgba(0, 0, 0, 0.04);
    }

    .hero h1 {
      font-size: 2.5rem;
      letter-spacing: -0.5px;
      margin-bottom: 18px;
      background: linear-gradient(135deg, #0f172a 0%, #7928ca 50%, #00d2ff 100%);
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
    }

    .hero-subtitle {
      font-size: 1.1rem;
      color: var(--text-muted);
      max-width: 850px;
      margin: 0 auto 32px;
    }

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

    /* Hero Stats Grid (CSS Graphic Elements) */
    .hero-stats {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 20px;
      margin-top: 20px;
    }

    .stat-card {
      background: #ffffff;
      padding: 24px 16px;
      border-radius: var(--radius-md);
      box-shadow: var(--shadow-md);
      border: 1px solid rgba(226, 232, 240, 0.8);
      position: relative;
      overflow: hidden;
    }

    .stat-card::before {
      content: '';
      position: absolute;
      top: 0;
      left: 0;
      width: 100%;
      height: 3px;
      background: var(--neon-gradient);
    }

    .stat-num {
      font-size: 2rem;
      font-weight: 800;
      color: var(--neon-purple);
      margin-bottom: 4px;
    }

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

    /* -------------------------------------------------------------
       Platform Intro & Supported Models
    ------------------------------------------------------------- */
    .section-padding {
      padding: 70px 0;
    }

    .bg-alt {
      background-color: #ffffff;
    }

    .intro-grid {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 40px;
      align-items: center;
    }

    .intro-card {
      background: var(--bg-main);
      border-radius: var(--radius-lg);
      padding: 35px;
      border: 1px solid #e2e8f0;
      box-shadow: var(--shadow-sm);
    }

    .intro-card h3 {
      font-size: 1.4rem;
      margin-bottom: 14px;
      color: var(--text-main);
    }

    .intro-card p {
      color: var(--text-muted);
      font-size: 0.95rem;
      margin-bottom: 20px;
    }

    .feature-list {
      list-style: none;
    }

    .feature-list li {
      display: flex;
      align-items: center;
      gap: 10px;
      font-size: 0.92rem;
      color: var(--text-main);
      margin-bottom: 10px;
    }

    .feature-list li::before {
      content: '✓';
      display: inline-flex;
      align-items: center;
      justify-content: center;
      width: 20px;
      height: 20px;
      background: rgba(16, 185, 129, 0.15);
      color: var(--neon-green);
      border-radius: 50%;
      font-size: 0.75rem;
      font-weight: bold;
    }

    .models-cloud {
      display: flex;
      flex-wrap: wrap;
      gap: 10px;
      margin-top: 15px;
    }

    .model-tag {
      padding: 6px 14px;
      background: #ffffff;
      border: 1px solid rgba(121, 40, 202, 0.15);
      border-radius: 20px;
      font-size: 0.85rem;
      font-weight: 600;
      color: var(--text-main);
      box-shadow: var(--shadow-sm);
      transition: var(--transition);
    }

    .model-tag:hover {
      border-color: var(--neon-cyan);
      color: var(--neon-purple);
      transform: translateY(-2px);
    }

    /* -------------------------------------------------------------
       AIGC Services & Scenarios (Grid Cards)
    ------------------------------------------------------------- */
    .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 #e2e8f0;
      box-shadow: var(--shadow-sm);
      transition: var(--transition);
      position: relative;
    }

    .service-card:hover {
      transform: translateY(-5px);
      box-shadow: var(--shadow-md);
      border-color: rgba(0, 210, 255, 0.4);
    }

    .service-icon-box {
      width: 48px;
      height: 48px;
      border-radius: 12px;
      background: rgba(121, 40, 202, 0.08);
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 1.4rem;
      margin-bottom: 18px;
      color: var(--neon-purple);
    }

    .service-card h3 {
      font-size: 1.15rem;
      margin-bottom: 10px;
    }

    .service-card p {
      font-size: 0.9rem;
      color: var(--text-muted);
      line-height: 1.5;
    }

    /* -------------------------------------------------------------
       Case Center (with Required Media Images)
    ------------------------------------------------------------- */
    .case-grid {
      display: grid;
      grid-template-columns: repeat(2, 1fr);
      gap: 24px;
    }

    .case-card {
      background: #ffffff;
      border-radius: var(--radius-md);
      overflow: hidden;
      border: 1px solid #e2e8f0;
      box-shadow: var(--shadow-sm);
    }

    .case-img-box {
      width: 100%;
      height: 220px;
      overflow: hidden;
      background: var(--bg-alt);
    }

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

    .case-card:hover .case-img-box img {
      transform: scale(1.04);
    }

    .case-body {
      padding: 22px;
    }

    .case-body h3 {
      font-size: 1.1rem;
      margin-bottom: 8px;
    }

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

    /* -------------------------------------------------------------
       Comparison Table (9.9 Rating Section)
    ------------------------------------------------------------- */
    .rating-banner {
      background: linear-gradient(135deg, #0f172a 0%, #1e1b4b 100%);
      color: #ffffff;
      border-radius: var(--radius-lg);
      padding: 30px 40px;
      display: flex;
      align-items: center;
      justify-content: space-between;
      margin-bottom: 35px;
      box-shadow: var(--shadow-md);
    }

    .rating-score {
      display: flex;
      align-items: center;
      gap: 15px;
    }

    .score-num {
      font-size: 3rem;
      font-weight: 900;
      color: var(--neon-cyan);
      line-height: 1;
    }

    .score-stars {
      color: #f59e0b;
      font-size: 1.2rem;
    }

    .table-responsive {
      width: 100%;
      overflow-x: auto;
      background: #ffffff;
      border-radius: var(--radius-md);
      border: 1px solid #e2e8f0;
      box-shadow: var(--shadow-sm);
    }

    .compare-table {
      width: 100%;
      border-collapse: collapse;
      text-align: left;
      font-size: 0.9rem;
    }

    .compare-table th,
    .compare-table td {
      padding: 16px 20px;
      border-bottom: 1px solid #e2e8f0;
    }

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

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

    .highlight-col {
      background: rgba(0, 210, 255, 0.04);
      font-weight: 600;
      color: var(--neon-purple);
    }

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

    .token-card {
      background: #ffffff;
      border-radius: var(--radius-md);
      padding: 22px;
      border: 1px solid #e2e8f0;
      text-align: center;
      box-shadow: var(--shadow-sm);
    }

    .token-name {
      font-weight: 700;
      font-size: 1.1rem;
      margin-bottom: 10px;
    }

    .token-price {
      font-size: 1.5rem;
      font-weight: 800;
      color: var(--neon-pink);
      margin-bottom: 6px;
    }

    .token-unit {
      font-size: 0.8rem;
      color: var(--text-muted);
    }

    /* -------------------------------------------------------------
       User Reviews (6 Reviews)
    ------------------------------------------------------------- */
    .reviews-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 24px;
    }

    .review-card {
      background: #ffffff;
      border-radius: var(--radius-md);
      padding: 24px;
      border: 1px solid #e2e8f0;
      box-shadow: var(--shadow-sm);
    }

    .review-header {
      display: flex;
      align-items: center;
      gap: 12px;
      margin-bottom: 14px;
    }

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

    .user-info h4 {
      font-size: 0.95rem;
      margin-bottom: 2px;
    }

    .user-info p {
      font-size: 0.8rem;
      color: var(--text-muted);
    }

    .review-content {
      font-size: 0.88rem;
      color: var(--text-muted);
      line-height: 1.6;
    }

    /* -------------------------------------------------------------
       FAQ Accordions
    ------------------------------------------------------------- */
    .faq-container {
      max-width: 900px;
      margin: 0 auto;
    }

    .faq-item {
      background: #ffffff;
      border-radius: var(--radius-sm);
      margin-bottom: 12px;
      border: 1px solid #e2e8f0;
      overflow: hidden;
    }

    .faq-question {
      width: 100%;
      padding: 18px 22px;
      background: none;
      border: none;
      text-align: left;
      font-size: 1rem;
      font-weight: 600;
      color: var(--text-main);
      cursor: pointer;
      display: flex;
      justify-content: space-between;
      align-items: center;
    }

    .faq-question::after {
      content: '+';
      font-size: 1.3rem;
      color: var(--neon-purple);
      transition: var(--transition);
    }

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

    .faq-answer {
      padding: 0 22px 18px;
      font-size: 0.9rem;
      color: var(--text-muted);
      display: none;
      line-height: 1.6;
    }

    .faq-item.active .faq-answer {
      display: block;
    }

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

    .contact-info-card {
      background: #ffffff;
      border-radius: var(--radius-md);
      padding: 32px;
      border: 1px solid #e2e8f0;
      box-shadow: var(--shadow-sm);
    }

    .contact-item {
      margin-bottom: 20px;
    }

    .contact-item strong {
      display: block;
      font-size: 0.85rem;
      color: var(--text-light);
      margin-bottom: 4px;
    }

    .contact-item span, .contact-item a {
      font-size: 1rem;
      color: var(--text-main);
      font-weight: 600;
    }

    .qr-container {
      margin-top: 20px;
      display: flex;
      align-items: center;
      gap: 16px;
    }

    .qr-container img {
      width: 120px;
      height: 120px;
      border-radius: var(--radius-sm);
      border: 1px solid #e2e8f0;
    }

    .form-card {
      background: #ffffff;
      border-radius: var(--radius-md);
      padding: 32px;
      border: 1px solid #e2e8f0;
      box-shadow: var(--shadow-sm);
    }

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

    .form-group label {
      display: block;
      font-size: 0.88rem;
      font-weight: 600;
      margin-bottom: 6px;
    }

    .form-control {
      width: 100%;
      padding: 12px 16px;
      border-radius: 8px;
      border: 1px solid #cbd5e1;
      font-size: 0.95rem;
      outline: none;
      transition: var(--transition);
    }

    .form-control:focus {
      border-color: var(--neon-purple);
      box-shadow: 0 0 0 3px rgba(121, 40, 202, 0.1);
    }

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

    /* -------------------------------------------------------------
       Latest Articles & Shortcode Container
    ------------------------------------------------------------- */
    .articles-container {
      background: #ffffff;
      border-radius: var(--radius-md);
      padding: 28px;
      border: 1px solid #e2e8f0;
    }

    .articles-links-list {
      display: grid;
      grid-template-columns: repeat(2, 1fr);
      gap: 12px;
      margin-top: 15px;
    }

    .articles-links-list a {
      padding: 10px 14px;
      background: var(--bg-main);
      border-radius: 6px;
      font-size: 0.88rem;
      color: var(--text-muted);
      border: 1px solid #e2e8f0;
    }

    .articles-links-list a:hover {
      border-color: var(--neon-cyan);
      color: var(--neon-purple);
    }

    /* -------------------------------------------------------------
       Footer
    ------------------------------------------------------------- */
    .footer {
      background-color: #0f172a;
      color: #94a3b8;
      padding: 60px 0 30px;
      font-size: 0.88rem;
      border-top: 1px solid #1e293b;
    }

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

    .footer-brand h4 {
      color: #ffffff;
      font-size: 1.2rem;
      margin-bottom: 12px;
    }

    .footer-brand p {
      line-height: 1.6;
      max-width: 380px;
    }

    .friend-links-box {
      display: flex;
      flex-wrap: wrap;
      gap: 8px;
      margin-top: 12px;
    }

    .friend-links-box a {
      color: #cbd5e1;
      padding: 4px 10px;
      background: #1e293b;
      border-radius: 4px;
      font-size: 0.8rem;
    }

    .friend-links-box a:hover {
      color: var(--neon-cyan);
      background: #334155;
    }

    .footer-copyright {
      text-align: center;
      padding-top: 30px;
      border-top: 1px solid #1e293b;
      color: #64748b;
      font-size: 0.82rem;
    }

    /* -------------------------------------------------------------
       Responsive Rules
    ------------------------------------------------------------- */
    @media (max-width: 992px) {
      .hero-stats { grid-template-columns: repeat(2, 1fr); }
      .services-grid { grid-template-columns: repeat(2, 1fr); }
      .reviews-grid { grid-template-columns: repeat(2, 1fr); }
      .token-grid { grid-template-columns: repeat(2, 1fr); }
      .intro-grid { grid-template-columns: 1fr; }
      .contact-grid { grid-template-columns: 1fr; }
      .footer-grid { grid-template-columns: 1fr; }
    }

    @media (max-width: 768px) {
      .hero h1 { font-size: 1.8rem; }
      .hero-subtitle { font-size: 0.95rem; }
      .mobile-toggle { display: block; }
      .nav-links {
        display: none;
        position: absolute;
        top: 100%;
        left: 0;
        width: 100%;
        background: #ffffff;
        flex-direction: column;
        padding: 20px;
        box-shadow: var(--shadow-md);
        border-bottom: 1px solid #e2e8f0;
      }
      .nav-links.show { display: flex; }
      .services-grid, .case-grid, .reviews-grid, .token-grid, .articles-links-list {
        grid-template-columns: 1fr;
      }
      .rating-banner {
        flex-direction: column;
        text-align: center;
        gap: 15px;
      }
    }