/* CSS Reset & Variables */
    :root {
      --primary: #FFC700;
      --primary-hover: #E6A100;
      --primary-light: #FFFBEB;
      --primary-border: #FFE58F;
      --dark: #0F172A;
      --dark-muted: #334155;
      --text-main: #1E293B;
      --text-muted: #64748B;
      --bg-body: #FAFAFA;
      --bg-white: #FFFFFF;
      --bg-secondary: #F8FAFC;
      --border-color: #E2E8F0;
      --shadow-sm: 0 2px 4px rgba(0,0,0,0.04);
      --shadow-md: 0 10px 25px -5px rgba(255, 199, 0, 0.15), 0 8px 10px -6px rgba(0, 0, 0, 0.05);
      --shadow-lg: 0 20px 30px -10px rgba(15, 23, 42, 0.1);
      --radius: 12px;
      --radius-sm: 6px;
      --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
      --container-max: 1200px;
    }

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

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

    body {
      overflow-x: hidden;
      display: flex;
      flex-direction: column;
      min-height: 100vh;
    }

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

    ul, ol {
      list-style: none;
    }

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

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

    .section-padding {
      padding: 80px 0;
    }

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

    .section-tag {
      display: inline-block;
      background: var(--primary-light);
      color: var(--dark);
      border: 1px solid var(--primary-border);
      padding: 6px 16px;
      border-radius: 20px;
      font-size: 14px;
      font-weight: 700;
      margin-bottom: 12px;
      letter-spacing: 0.5px;
    }

    .section-title {
      font-size: 32px;
      font-weight: 800;
      color: var(--dark);
      margin-bottom: 14px;
    }

    .section-subtitle {
      font-size: 16px;
      color: var(--text-muted);
      max-width: 700px;
      margin: 0 auto;
    }

    /* Primary Button */
    .btn {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      padding: 12px 28px;
      font-size: 16px;
      font-weight: 700;
      border-radius: var(--radius-sm);
      cursor: pointer;
      border: none;
      transition: var(--transition);
      gap: 8px;
    }

    .btn-primary {
      background-color: var(--primary);
      color: var(--dark);
      box-shadow: 0 4px 14px rgba(255, 199, 0, 0.4);
    }

    .btn-primary:hover {
      background-color: var(--primary-hover);
      transform: translateY(-2px);
      box-shadow: 0 6px 20px rgba(255, 199, 0, 0.6);
    }

    .btn-dark {
      background-color: var(--dark);
      color: #FFFFFF;
    }

    .btn-dark:hover {
      background-color: var(--dark-muted);
      transform: translateY(-2px);
    }

    .btn-outline {
      background-color: transparent;
      border: 2px solid var(--dark);
      color: var(--dark);
    }

    .btn-outline:hover {
      background-color: var(--dark);
      color: var(--primary);
    }

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

    .header-inner {
      display: flex;
      align-items: center;
      justify-content: space-between;
      height: 76px;
    }

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

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

    .brand-name {
      font-size: 20px;
      font-weight: 800;
      color: var(--dark);
      letter-spacing: -0.5px;
    }

    /* Explicit requirement: .nav-links gap: 0 */
    .nav-links {
      display: flex;
      align-items: center;
      list-style: none;
      margin: 0;
      padding: 0;
      gap: 0;
    }

    .nav-links li a {
      padding: 10px 14px;
      font-size: 14px;
      font-weight: 600;
      color: var(--text-main);
      border-radius: 4px;
      white-space: nowrap;
    }

    .nav-links li a:hover {
      color: var(--dark);
      background-color: var(--primary-light);
    }

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

    .mobile-menu-toggle {
      display: none;
      background: none;
      border: none;
      font-size: 24px;
      color: var(--dark);
      cursor: pointer;
    }

    /* Hero Section (No Images Allowed) */
    .hero-section {
      background: linear-gradient(135deg, #FFFBEB 0%, #FFFFFF 60%, #FEF3C7 100%);
      padding: 90px 0 70px 0;
      position: relative;
      border-bottom: 1px solid var(--primary-border);
      text-align: center;
    }

    .hero-badge {
      display: inline-flex;
      align-items: center;
      gap: 8px;
      background: var(--primary);
      color: var(--dark);
      font-weight: 800;
      font-size: 13px;
      padding: 6px 18px;
      border-radius: 30px;
      margin-bottom: 24px;
      text-transform: uppercase;
      box-shadow: 0 4px 12px rgba(255, 199, 0, 0.3);
    }

    .hero-title {
      font-size: 44px;
      font-weight: 900;
      color: var(--dark);
      line-height: 1.25;
      margin-bottom: 20px;
      letter-spacing: -1px;
    }

    .hero-title span {
      background: linear-gradient(120deg, #D97706, #B45309);
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
      border-bottom: 4px solid var(--primary);
    }

    .hero-desc {
      font-size: 18px;
      color: var(--dark-muted);
      max-width: 840px;
      margin: 0 auto 36px auto;
      line-height: 1.7;
    }

    .hero-cta-group {
      display: flex;
      align-items: center;
      justify-content: center;
      gap: 16px;
      flex-wrap: wrap;
      margin-bottom: 40px;
    }

    .hero-models-tagflow {
      display: flex;
      flex-wrap: wrap;
      justify-content: center;
      gap: 8px;
      max-width: 960px;
      margin: 0 auto;
      padding: 20px;
      background: rgba(255, 255, 255, 0.7);
      border-radius: var(--radius);
      border: 1px solid var(--primary-border);
    }

    .model-chip {
      background: var(--bg-white);
      border: 1px solid var(--border-color);
      padding: 4px 12px;
      border-radius: 16px;
      font-size: 12px;
      font-weight: 600;
      color: var(--dark-muted);
      transition: var(--transition);
    }

    .model-chip:hover {
      border-color: var(--primary);
      background: var(--primary-light);
      color: var(--dark);
    }

    /* Metrics Bar */
    .metrics-bar {
      background: var(--dark);
      color: #FFFFFF;
      padding: 30px 0;
    }

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

    .metric-item .number {
      font-size: 36px;
      font-weight: 900;
      color: var(--primary);
      line-height: 1.1;
    }

    .metric-item .label {
      font-size: 14px;
      color: #94A3B8;
      margin-top: 6px;
    }

    /* Service Grid */
    .service-grid {
      display: grid;
      grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
      gap: 24px;
    }

    .service-card {
      background: var(--bg-white);
      border: 1px solid var(--border-color);
      border-radius: var(--radius);
      padding: 28px;
      transition: var(--transition);
      display: flex;
      flex-direction: column;
      position: relative;
    }

    .service-card:hover {
      border-color: var(--primary);
      transform: translateY(-5px);
      box-shadow: var(--shadow-md);
    }

    .service-icon-box {
      width: 48px;
      height: 48px;
      background: var(--primary);
      color: var(--dark);
      border-radius: 8px;
      display: flex;
      align-items: center;
      justify-content: center;
      font-weight: 800;
      font-size: 20px;
      margin-bottom: 20px;
    }

    .service-card h3 {
      font-size: 18px;
      font-weight: 700;
      color: var(--dark);
      margin-bottom: 10px;
    }

    .service-card p {
      font-size: 14px;
      color: var(--text-muted);
      flex-grow: 1;
      margin-bottom: 16px;
    }

    .service-tag {
      display: inline-block;
      align-self: flex-start;
      background: var(--primary-light);
      color: var(--dark);
      font-size: 12px;
      font-weight: 700;
      padding: 4px 10px;
      border-radius: 4px;
    }

    /* Platform Showcase & Media Images */
    .showcase-grid {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 30px;
      align-items: center;
    }

    .showcase-text h3 {
      font-size: 26px;
      font-weight: 800;
      color: var(--dark);
      margin-bottom: 16px;
    }

    .showcase-text p {
      color: var(--text-muted);
      margin-bottom: 20px;
    }

    .showcase-list {
      margin-bottom: 24px;
    }

    .showcase-list li {
      display: flex;
      align-items: flex-start;
      gap: 10px;
      margin-bottom: 12px;
      font-size: 15px;
      font-weight: 600;
    }

    .showcase-list li::before {
      content: "✔";
      color: var(--dark);
      background: var(--primary);
      width: 20px;
      height: 20px;
      border-radius: 50%;
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 11px;
      flex-shrink: 0;
      margin-top: 2px;
    }

    .showcase-img-box {
      border-radius: var(--radius);
      overflow: hidden;
      box-shadow: var(--shadow-lg);
      border: 3px solid var(--primary-border);
      background: #FFFFFF;
    }

    /* Comparison Table Section */
    .eval-card {
      background: var(--bg-white);
      border: 2px solid var(--primary);
      border-radius: var(--radius);
      padding: 30px;
      box-shadow: var(--shadow-md);
      margin-bottom: 40px;
    }

    .eval-header {
      display: flex;
      justify-content: space-between;
      align-items: center;
      border-bottom: 2px solid var(--border-color);
      padding-bottom: 20px;
      margin-bottom: 24px;
      flex-wrap: wrap;
      gap: 16px;
    }

    .eval-score-box {
      display: flex;
      align-items: center;
      gap: 16px;
    }

    .score-num {
      font-size: 48px;
      font-weight: 900;
      color: var(--dark);
      background: var(--primary);
      padding: 4px 20px;
      border-radius: 12px;
      line-height: 1;
    }

    .score-meta .stars {
      color: #F59E0B;
      font-size: 20px;
    }

    .score-meta .rec {
      font-weight: 700;
      color: var(--dark);
    }

    .comparison-table-wrap {
      overflow-x: auto;
    }

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

    .comparison-table th, .comparison-table td {
      padding: 16px;
      border-bottom: 1px solid var(--border-color);
    }

    .comparison-table th {
      background: var(--primary-light);
      color: var(--dark);
      font-weight: 800;
    }

    .comparison-table td strong {
      color: var(--dark);
    }

    .highlight-col {
      background: rgba(255, 199, 0, 0.08);
      font-weight: 700;
    }

    /* Process Section */
    .process-steps {
      display: grid;
      grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
      gap: 20px;
    }

    .process-card {
      background: var(--bg-white);
      padding: 24px;
      border-radius: var(--radius);
      border: 1px solid var(--border-color);
      position: relative;
    }

    .process-step-num {
      font-size: 32px;
      font-weight: 900;
      color: var(--primary);
      margin-bottom: 8px;
    }

    .process-card h4 {
      font-size: 18px;
      font-weight: 700;
      color: var(--dark);
      margin-bottom: 8px;
    }

    .process-card p {
      font-size: 14px;
      color: var(--text-muted);
    }

    /* Reviews Section */
    .reviews-grid {
      display: grid;
      grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
      gap: 24px;
    }

    .review-card {
      background: var(--bg-white);
      border: 1px solid var(--border-color);
      border-radius: var(--radius);
      padding: 24px;
      display: flex;
      flex-direction: column;
      justify-content: space-between;
      box-shadow: var(--shadow-sm);
    }

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

    .review-author {
      display: flex;
      align-items: center;
      gap: 12px;
      border-top: 1px dashed var(--border-color);
      padding-top: 14px;
    }

    .avatar-placeholder {
      width: 42px;
      height: 42px;
      border-radius: 50%;
      background: var(--primary);
      color: var(--dark);
      display: flex;
      align-items: center;
      justify-content: center;
      font-weight: 800;
    }

    .author-info h5 {
      font-size: 15px;
      font-weight: 700;
      color: var(--dark);
    }

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

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

    .faq-item {
      background: var(--bg-white);
      border: 1px solid var(--border-color);
      border-radius: var(--radius-sm);
      margin-bottom: 12px;
      overflow: hidden;
    }

    .faq-question {
      width: 100%;
      padding: 18px 24px;
      text-align: left;
      background: none;
      border: none;
      font-size: 16px;
      font-weight: 700;
      color: var(--dark);
      cursor: pointer;
      display: flex;
      justify-content: space-between;
      align-items: center;
    }

    .faq-question:hover {
      background: var(--primary-light);
    }

    .faq-toggle-icon {
      font-weight: 800;
      font-size: 18px;
      transition: transform 0.3s ease;
    }

    .faq-answer {
      max-height: 0;
      overflow: hidden;
      transition: max-height 0.3s ease, padding 0.3s ease;
      background: var(--bg-secondary);
      color: var(--dark-muted);
      font-size: 14px;
      line-height: 1.7;
    }

    .faq-item.active .faq-answer {
      max-height: 300px;
      padding: 16px 24px 20px 24px;
      border-top: 1px solid var(--border-color);
    }

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

    /* Articles / News Section */
    .articles-grid {
      display: grid;
      grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
      gap: 16px;
    }

    .article-card {
      background: var(--bg-white);
      border: 1px solid var(--border-color);
      border-radius: var(--radius-sm);
      padding: 16px;
      transition: var(--transition);
    }

    .article-card:hover {
      border-color: var(--primary);
      box-shadow: var(--shadow-sm);
    }

    .article-card a {
      font-size: 14px;
      font-weight: 700;
      color: var(--dark);
      display: block;
      margin-bottom: 8px;
    }

    .article-card a:hover {
      color: #D97706;
    }

    .article-meta {
      font-size: 12px;
      color: var(--text-muted);
    }

    /* Form & Contact Section */
    .contact-wrapper {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 40px;
      background: var(--bg-white);
      border: 1px solid var(--border-color);
      border-radius: var(--radius);
      padding: 40px;
      box-shadow: var(--shadow-md);
    }

    .contact-info h3 {
      font-size: 24px;
      font-weight: 800;
      color: var(--dark);
      margin-bottom: 16px;
    }

    .contact-info p {
      font-size: 15px;
      color: var(--text-muted);
      margin-bottom: 24px;
    }

    .info-list-item {
      display: flex;
      align-items: center;
      gap: 14px;
      margin-bottom: 16px;
      font-size: 15px;
      font-weight: 600;
    }

    .info-icon {
      width: 36px;
      height: 36px;
      background: var(--primary-light);
      border: 1px solid var(--primary-border);
      border-radius: 50%;
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 16px;
    }

    .qr-box {
      margin-top: 24px;
      padding: 16px;
      background: var(--primary-light);
      border: 1px solid var(--primary-border);
      border-radius: var(--radius-sm);
      display: flex;
      align-items: center;
      gap: 16px;
    }

    .qr-box img {
      width: 100px;
      height: 100px;
      object-fit: cover;
      border-radius: 6px;
    }

    .form-group {
      margin-bottom: 16px;
    }

    .form-group label {
      display: block;
      font-size: 14px;
      font-weight: 700;
      color: var(--dark);
      margin-bottom: 6px;
    }

    .form-control {
      width: 100%;
      padding: 12px 14px;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-sm);
      font-size: 14px;
      outline: none;
      transition: var(--transition);
      background: var(--bg-secondary);
    }

    .form-control:focus {
      border-color: var(--dark);
      background: var(--bg-white);
    }

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

    /* Partner & Agency */
    .agency-banner {
      background: linear-gradient(135deg, var(--dark) 0%, #1E293B 100%);
      color: #FFFFFF;
      border-radius: var(--radius);
      padding: 45px;
      display: flex;
      align-items: center;
      justify-content: space-between;
      gap: 30px;
      flex-wrap: wrap;
    }

    .agency-text h3 {
      font-size: 28px;
      font-weight: 800;
      color: var(--primary);
      margin-bottom: 10px;
    }

    .agency-text p {
      font-size: 16px;
      color: #CBD5E1;
      max-width: 650px;
    }

    /* Footer */
    .footer {
      background: #090D16;
      color: #94A3B8;
      padding: 60px 0 30px 0;
      margin-top: auto;
      border-top: 3px solid var(--primary);
    }

    .footer-grid {
      display: grid;
      grid-template-columns: 2fr 1fr 1fr 1.5fr;
      gap: 30px;
      margin-bottom: 40px;
    }

    .footer-brand h4 {
      font-size: 20px;
      font-weight: 800;
      color: #FFFFFF;
      margin-bottom: 12px;
    }

    .footer-brand p {
      font-size: 14px;
      line-height: 1.6;
      margin-bottom: 16px;
    }

    .footer-links h5 {
      font-size: 16px;
      font-weight: 700;
      color: #FFFFFF;
      margin-bottom: 16px;
    }

    .footer-links ul li {
      margin-bottom: 8px;
    }

    .footer-links ul li a {
      font-size: 14px;
      color: #94A3B8;
    }

    .footer-links ul li a:hover {
      color: var(--primary);
    }

    .friendship-links {
      display: flex;
      flex-wrap: wrap;
      gap: 10px;
      margin-top: 10px;
    }

    .friendship-links a {
      font-size: 13px;
      color: #94A3B8;
      background: rgba(255,255,255,0.05);
      padding: 4px 10px;
      border-radius: 4px;
    }

    .friendship-links a:hover {
      color: var(--primary);
      background: rgba(255,255,255,0.1);
    }

    .footer-bottom {
      border-top: 1px solid rgba(255, 255, 255, 0.1);
      padding-top: 24px;
      display: flex;
      justify-content: space-between;
      align-items: center;
      flex-wrap: wrap;
      gap: 12px;
      font-size: 13px;
    }

    /* Floating Widget */
    .float-kefu {
      position: fixed;
      right: 20px;
      bottom: 20px;
      z-index: 999;
      background: var(--primary);
      color: var(--dark);
      padding: 12px 18px;
      border-radius: 30px;
      font-weight: 800;
      box-shadow: 0 10px 25px rgba(0,0,0,0.2);
      display: flex;
      align-items: center;
      gap: 8px;
      cursor: pointer;
      transition: var(--transition);
    }

    .float-kefu:hover {
      transform: scale(1.05);
      background: var(--primary-hover);
    }

    /* Responsive Breakpoints */
    @media (max-width: 992px) {
      .hero-title { font-size: 34px; }
      .metrics-grid { grid-template-columns: repeat(2, 1fr); }
      .showcase-grid { grid-template-columns: 1fr; }
      .contact-wrapper { grid-template-columns: 1fr; }
      .footer-grid { grid-template-columns: 1fr 1fr; }
      .agency-banner { text-align: center; justify-content: center; }
    }

    @media (max-width: 768px) {
      .mobile-menu-toggle { display: block; }
      .nav-links {
        display: none;
        position: absolute;
        top: 76px;
        left: 0;
        width: 100%;
        background: var(--bg-white);
        flex-direction: column;
        padding: 20px;
        border-bottom: 1px solid var(--border-color);
        box-shadow: var(--shadow-md);
      }
      .nav-links.show { display: flex; }
      .hero-title { font-size: 28px; }
      .hero-desc { font-size: 15px; }
      .footer-grid { grid-template-columns: 1fr; }
      .metrics-grid { grid-template-columns: 1fr 1fr; }
    }