/* Reset & Base */
    * {
      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: #333333;
      background-color: #FFF9F5;
    }
    body {
      line-height: 1.6;
    }
    a {
      text-decoration: none;
      color: inherit;
      transition: all 0.3s ease;
    }
    img {
      max-width: 100%;
      height: auto;
      display: block;
    }

    /* Variables & Utilities */
    :root {
      --primary-color: #FF5E00;
      --primary-hover: #FF3C00;
      --primary-gradient: linear-gradient(135deg, #FF7300 0%, #FF3C00 100%);
      --dark-color: #1A1A1A;
      --light-color: #FFFFFF;
      --gray-light: #F7F7F7;
      --border-color: rgba(255, 94, 0, 0.15);
      --container-width: 1200px;
      --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    }

    .container {
      width: 100%;
      max-width: var(--container-width);
      margin: 0 auto;
      padding: 0 20px;
    }
    .section-padding {
      padding: 80px 0;
    }
    .section-title-wrap {
      text-align: center;
      margin-bottom: 50px;
    }
    .section-title {
      font-size: 2.2rem;
      color: var(--dark-color);
      margin-bottom: 15px;
      position: relative;
      display: inline-block;
    }
    .section-title::after {
      content: '';
      position: absolute;
      bottom: -8px;
      left: 50%;
      transform: translateX(-50%);
      width: 60px;
      height: 4px;
      background: var(--primary-gradient);
      border-radius: 2px;
    }
    .section-subtitle {
      font-size: 1.1rem;
      color: #666;
    }
    .btn {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      padding: 12px 28px;
      font-size: 1rem;
      font-weight: 600;
      border-radius: 8px;
      cursor: pointer;
      transition: var(--transition);
      border: none;
    }
    .btn-primary {
      background: var(--primary-gradient);
      color: var(--light-color);
      box-shadow: 0 4px 15px rgba(255, 94, 0, 0.3);
    }
    .btn-primary:hover {
      transform: translateY(-2px);
      box-shadow: 0 6px 20px rgba(255, 94, 0, 0.4);
    }
    .btn-outline {
      background: transparent;
      border: 2px solid var(--primary-color);
      color: var(--primary-color);
    }
    .btn-outline:hover {
      background: var(--primary-gradient);
      color: var(--light-color);
      transform: translateY(-2px);
    }

    /* Header & Navigation */
    header {
      background-color: rgba(255, 255, 255, 0.95);
      backdrop-filter: blur(10px);
      box-shadow: 0 2px 15px rgba(0, 0, 0, 0.05);
      position: sticky;
      top: 0;
      z-index: 1000;
      border-bottom: 1px solid var(--border-color);
    }
    .nav-container {
      display: flex;
      justify-content: space-between;
      align-items: center;
      height: 80px;
    }
    .logo-area {
      display: flex;
      align-items: center;
    }
    .ai-page-logo {
      height: 45px;
      width: auto;
    }
    .nav-links {
      display: flex;
      gap: 20px;
      align-items: center;
    }
    .nav-link {
      font-size: 0.95rem;
      color: #444;
      font-weight: 500;
    }
    .nav-link:hover {
      color: var(--primary-color);
    }
    .nav-btn {
      margin-left: 10px;
    }
    .menu-toggle {
      display: none;
      flex-direction: column;
      gap: 5px;
      cursor: pointer;
      background: none;
      border: none;
    }
    .menu-toggle span {
      width: 25px;
      height: 3px;
      background-color: var(--primary-color);
      border-radius: 2px;
      transition: var(--transition);
    }

    /* 1. Hero Section (NO IMAGES) */
    .hero-section {
      background: radial-gradient(circle at 10% 20%, rgba(255, 115, 0, 0.05) 0%, rgba(255, 255, 255, 1) 90%);
      padding: 120px 0 100px;
      text-align: center;
      position: relative;
      overflow: hidden;
    }
    .hero-badge {
      display: inline-block;
      background: rgba(255, 94, 0, 0.1);
      color: var(--primary-color);
      padding: 6px 16px;
      border-radius: 50px;
      font-weight: 600;
      font-size: 0.9rem;
      margin-bottom: 25px;
      border: 1px solid rgba(255, 94, 0, 0.2);
    }
    h1.hero-title {
      font-size: 3rem;
      color: var(--dark-color);
      line-height: 1.25;
      margin-bottom: 25px;
      font-weight: 800;
    }
    h1.hero-title span {
      color: var(--primary-color);
      background: var(--primary-gradient);
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
    }
    .hero-description {
      font-size: 1.25rem;
      color: #555;
      max-width: 800px;
      margin: 0 auto 40px;
      line-height: 1.8;
    }
    .hero-buttons {
      display: flex;
      justify-content: center;
      gap: 20px;
      margin-bottom: 50px;
    }
    .hero-features {
      display: flex;
      justify-content: center;
      gap: 40px;
      flex-wrap: wrap;
      margin-top: 30px;
    }
    .hero-feature-item {
      display: flex;
      align-items: center;
      gap: 8px;
      font-size: 1rem;
      color: #444;
      font-weight: 500;
    }
    .hero-feature-item svg {
      color: var(--primary-color);
      width: 20px;
      height: 20px;
    }

    /* 2. About & Platform Intro */
    .about-section {
      background-color: var(--light-color);
      border-bottom: 1px solid var(--border-color);
    }
    .about-grid {
      display: grid;
      grid-template-columns: 1.2fr 0.8fr;
      gap: 60px;
      align-items: center;
    }
    .about-content h3 {
      font-size: 1.8rem;
      color: var(--dark-color);
      margin-bottom: 20px;
    }
    .about-content p {
      color: #555;
      margin-bottom: 20px;
      font-size: 1.05rem;
      line-height: 1.8;
    }
    .highlight-list {
      list-style: none;
      margin-top: 25px;
    }
    .highlight-list li {
      display: flex;
      align-items: flex-start;
      gap: 10px;
      margin-bottom: 15px;
      font-size: 1rem;
      color: #333;
    }
    .highlight-list li svg {
      color: var(--primary-color);
      margin-top: 3px;
      flex-shrink: 0;
    }
    .about-card {
      background: var(--light-color);
      border: 1px solid var(--border-color);
      border-radius: 16px;
      padding: 35px;
      box-shadow: 0 10px 30px rgba(255, 94, 0, 0.05);
      position: relative;
    }
    .about-card::before {
      content: '';
      position: absolute;
      top: 0;
      left: 0;
      width: 100%;
      height: 6px;
      background: var(--primary-gradient);
      border-radius: 16px 16px 0 0;
    }

    /* 3. AIGC Service Ecosystem (Grid + Cloud) */
    .service-section {
      background-color: #FFFDFB;
    }
    .service-grid {
      display: grid;
      grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
      gap: 30px;
      margin-bottom: 50px;
    }
    .service-card {
      background-color: var(--light-color);
      border: 1px solid var(--border-color);
      border-radius: 12px;
      padding: 30px;
      transition: var(--transition);
    }
    .service-card:hover {
      transform: translateY(-5px);
      box-shadow: 0 12px 30px rgba(255, 94, 0, 0.08);
      border-color: var(--primary-color);
    }
    .service-icon {
      width: 50px;
      height: 50px;
      border-radius: 10px;
      background: rgba(255, 94, 0, 0.1);
      display: flex;
      align-items: center;
      justify-content: center;
      margin-bottom: 20px;
      color: var(--primary-color);
    }
    .service-card h4 {
      font-size: 1.3rem;
      margin-bottom: 12px;
      color: var(--dark-color);
    }
    .service-card p {
      font-size: 0.95rem;
      color: #666;
    }
    .model-cloud-box {
      background-color: var(--light-color);
      border: 1px solid var(--border-color);
      border-radius: 16px;
      padding: 40px;
      text-align: center;
    }
    .model-cloud-title {
      font-size: 1.4rem;
      color: var(--dark-color);
      margin-bottom: 25px;
      font-weight: 700;
    }
    .model-tags {
      display: flex;
      flex-wrap: wrap;
      justify-content: center;
      gap: 12px;
    }
    .model-tag {
      background-color: var(--gray-light);
      border: 1px solid rgba(0,0,0,0.06);
      padding: 8px 18px;
      border-radius: 30px;
      font-size: 0.9rem;
      color: #555;
      font-weight: 500;
      transition: var(--transition);
    }
    .model-tag:hover {
      background-color: var(--primary-color);
      color: var(--light-color);
      transform: scale(1.05);
    }

    /* 4. Workflow (Steps) */
    .flow-section {
      background-color: var(--light-color);
    }
    .flow-steps {
      display: grid;
      grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
      gap: 25px;
      position: relative;
    }
    .flow-step {
      background-color: #FFFDFB;
      border: 1px solid var(--border-color);
      border-radius: 12px;
      padding: 30px;
      text-align: center;
      position: relative;
      transition: var(--transition);
    }
    .flow-step:hover {
      border-color: var(--primary-color);
      box-shadow: 0 10px 25px rgba(255, 94, 0, 0.05);
    }
    .flow-num {
      width: 40px;
      height: 40px;
      border-radius: 50%;
      background: var(--primary-gradient);
      color: var(--light-color);
      display: flex;
      align-items: center;
      justify-content: center;
      font-weight: 800;
      margin: 0 auto 20px;
      font-size: 1.1rem;
    }
    .flow-step h4 {
      font-size: 1.2rem;
      margin-bottom: 10px;
      color: var(--dark-color);
    }
    .flow-step p {
      font-size: 0.9rem;
      color: #666;
    }

    /* 5. Industry Solutions */
    .solutions-section {
      background-color: #FFFDFB;
    }
    .solutions-grid {
      display: grid;
      grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
      gap: 30px;
    }
    .solution-item {
      background-color: var(--light-color);
      border: 1px solid var(--border-color);
      border-radius: 16px;
      overflow: hidden;
      box-shadow: 0 5px 15px rgba(0,0,0,0.02);
      transition: var(--transition);
    }
    .solution-item:hover {
      transform: translateY(-5px);
      box-shadow: 0 15px 35px rgba(255, 94, 0, 0.08);
    }
    .solution-info {
      padding: 30px;
    }
    .solution-tag {
      display: inline-block;
      background: rgba(255, 94, 0, 0.1);
      color: var(--primary-color);
      padding: 4px 12px;
      border-radius: 4px;
      font-size: 0.8rem;
      font-weight: 600;
      margin-bottom: 15px;
    }
    .solution-info h4 {
      font-size: 1.4rem;
      margin-bottom: 12px;
      color: var(--dark-color);
    }
    .solution-info p {
      font-size: 0.95rem;
      color: #666;
      margin-bottom: 15px;
    }

    /* 6. Service Network & 7. Standard Flow & 8. Tech Standards */
    .info-tabs-section {
      background-color: var(--light-color);
    }
    .info-tabs-grid {
      display: grid;
      grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
      gap: 30px;
    }
    .info-box {
      background-color: #FFFDFB;
      border: 1px solid var(--border-color);
      border-radius: 16px;
      padding: 40px 30px;
    }
    .info-box h3 {
      font-size: 1.5rem;
      margin-bottom: 25px;
      color: var(--dark-color);
      border-left: 4px solid var(--primary-color);
      padding-left: 12px;
    }
    .timeline {
      position: relative;
      padding-left: 20px;
      border-left: 2px solid rgba(255, 94, 0, 0.2);
    }
    .timeline-item {
      position: relative;
      margin-bottom: 25px;
    }
    .timeline-item::before {
      content: '';
      position: absolute;
      left: -27px;
      top: 5px;
      width: 12px;
      height: 12px;
      border-radius: 50%;
      background-color: var(--primary-color);
      border: 2px solid var(--light-color);
    }
    .timeline-title {
      font-weight: 700;
      font-size: 0.95rem;
      margin-bottom: 5px;
      color: var(--dark-color);
    }
    .timeline-desc {
      font-size: 0.85rem;
      color: #666;
    }

    /* 9. Case Center */
    .case-section {
      background-color: #FFFDFB;
    }
    .case-grid {
      display: grid;
      grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
      gap: 30px;
      margin-bottom: 50px;
    }
    .case-card {
      background-color: var(--light-color);
      border: 1px solid var(--border-color);
      border-radius: 12px;
      overflow: hidden;
      box-shadow: 0 4px 15px rgba(0,0,0,0.02);
    }
    .case-img-wrap {
      overflow: hidden;
      aspect-ratio: 16 / 9;
      background-color: #eee;
    }
    .case-img-wrap img {
      width: 100%;
      height: 100%;
      object-fit: cover;
      transition: var(--transition);
    }
    .case-card:hover .case-img-wrap img {
      transform: scale(1.05);
    }
    .case-body {
      padding: 25px;
    }
    .case-body h4 {
      font-size: 1.25rem;
      margin-bottom: 10px;
      color: var(--dark-color);
    }
    .case-body p {
      font-size: 0.9rem;
      color: #666;
    }

    /* 10. Comparison & 12. Token pricing */
    .compare-section {
      background-color: var(--light-color);
    }
    .score-badge-wrap {
      display: flex;
      justify-content: center;
      align-items: center;
      gap: 30px;
      margin-bottom: 40px;
      flex-wrap: wrap;
    }
    .score-card {
      background: var(--light-color);
      border: 2px solid var(--primary-color);
      border-radius: 12px;
      padding: 20px 40px;
      text-align: center;
      box-shadow: 0 5px 15px rgba(255, 94, 0, 0.05);
    }
    .score-num {
      font-size: 3rem;
      font-weight: 800;
      color: var(--primary-color);
      line-height: 1;
    }
    .score-stars {
      color: #FFC107;
      font-size: 1.5rem;
      margin-top: 5px;
    }
    .table-container {
      width: 100%;
      overflow-x: auto;
      border: 1px solid var(--border-color);
      border-radius: 12px;
      background-color: var(--light-color);
    }
    table.compare-table {
      width: 100%;
      border-collapse: collapse;
      text-align: left;
      min-width: 600px;
    }
    table.compare-table th, table.compare-table td {
      padding: 18px 24px;
      border-bottom: 1px solid var(--border-color);
    }
    table.compare-table th {
      background-color: #FFF9F5;
      color: var(--dark-color);
      font-weight: 700;
    }
    table.compare-table tr:last-child td {
      border-bottom: none;
    }
    table.compare-table tr.highlight-row {
      background-color: rgba(255, 94, 0, 0.03);
    }
    .badge-yes {
      color: #2e7d32;
      font-weight: bold;
    }
    .badge-no {
      color: #c62828;
    }

    /* 13. Training Section */
    .training-section {
      background-color: #FFFDFB;
    }
    .training-grid {
      display: grid;
      grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
      gap: 30px;
    }
    .training-card {
      background-color: var(--light-color);
      border: 1px solid var(--border-color);
      border-radius: 12px;
      padding: 30px;
      position: relative;
      transition: var(--transition);
    }
    .training-card:hover {
      border-color: var(--primary-color);
      box-shadow: 0 10px 25px rgba(255,94,0,0.06);
    }
    .training-auth {
      font-size: 0.8rem;
      color: #999;
      margin-bottom: 10px;
      display: block;
      text-transform: uppercase;
    }
    .training-card h4 {
      font-size: 1.25rem;
      color: var(--dark-color);
      margin-bottom: 15px;
    }
    .training-card p {
      font-size: 0.9rem;
      color: #666;
      margin-bottom: 20px;
    }
    .training-features {
      border-top: 1px solid rgba(0,0,0,0.05);
      padding-top: 15px;
      font-size: 0.85rem;
      color: #555;
    }

    /* 15. FAQ & 17. Troubleshooting & 18. Encyclopedia */
    .help-section {
      background-color: var(--light-color);
    }
    .help-grid {
      display: grid;
      grid-template-columns: 1.5fr 1fr;
      gap: 50px;
    }
    .faq-list {
      display: flex;
      flex-direction: column;
      gap: 15px;
    }
    .faq-item {
      border: 1px solid var(--border-color);
      border-radius: 8px;
      background-color: #FFFDFB;
      overflow: hidden;
      transition: var(--transition);
    }
    .faq-header {
      padding: 18px 24px;
      display: flex;
      justify-content: space-between;
      align-items: center;
      cursor: pointer;
      font-weight: 700;
      color: var(--dark-color);
      user-select: none;
    }
    .faq-icon {
      font-size: 1.2rem;
      transition: var(--transition);
      color: var(--primary-color);
    }
    .faq-body {
      max-height: 0;
      overflow: hidden;
      transition: max-height 0.3s cubic-bezier(0, 1, 0, 1);
      padding: 0 24px;
      background-color: var(--light-color);
    }
    .faq-body p {
      padding-bottom: 18px;
      color: #555;
      font-size: 0.95rem;
      line-height: 1.7;
    }
    .faq-item.active .faq-body {
      max-height: 1000px;
      transition: max-height 0.5s cubic-bezier(1, 0, 1, 0);
    }
    .faq-item.active .faq-icon {
      transform: rotate(45deg);
    }

    /* 6 User Reviews */
    .reviews-section {
      background-color: #FFFDFB;
    }
    .reviews-grid {
      display: grid;
      grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
      gap: 30px;
    }
    .review-card {
      background-color: var(--light-color);
      border: 1px solid var(--border-color);
      border-radius: 12px;
      padding: 30px;
      box-shadow: 0 5px 15px rgba(0,0,0,0.01);
      display: flex;
      flex-direction: column;
      justify-content: space-between;
    }
    .review-text {
      font-style: italic;
      color: #444;
      font-size: 0.95rem;
      line-height: 1.7;
      margin-bottom: 20px;
    }
    .review-user {
      display: flex;
      align-items: center;
      gap: 12px;
    }
    .review-avatar-text {
      width: 40px;
      height: 40px;
      border-radius: 50%;
      background: var(--primary-gradient);
      color: var(--light-color);
      display: flex;
      align-items: center;
      justify-content: center;
      font-weight: 700;
      font-size: 1rem;
    }
    .review-meta h5 {
      font-size: 0.95rem;
      color: var(--dark-color);
    }
    .review-meta span {
      font-size: 0.8rem;
      color: #888;
    }

    /* 19. Articles / Knowledge Base */
    .articles-section {
      background-color: var(--light-color);
    }
    .articles-grid {
      display: grid;
      grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
      gap: 30px;
    }
    .article-card {
      background-color: #FFFDFB;
      border: 1px solid var(--border-color);
      border-radius: 12px;
      padding: 25px;
      transition: var(--transition);
    }
    .article-card:hover {
      border-color: var(--primary-color);
      transform: translateY(-3px);
    }
    .article-card h4 {
      font-size: 1.15rem;
      color: var(--dark-color);
      margin-bottom: 12px;
      line-height: 1.5;
    }
    .article-card p {
      font-size: 0.9rem;
      color: #666;
      margin-bottom: 15px;
    }
    .article-link {
      font-size: 0.9rem;
      color: var(--primary-color);
      font-weight: 700;
      display: inline-flex;
      align-items: center;
      gap: 5px;
    }

    /* 20. Contact & Form */
    .contact-section {
      background-color: #FFFDFB;
      border-top: 1px solid var(--border-color);
    }
    .contact-grid {
      display: grid;
      grid-template-columns: 1fr 1.2fr;
      gap: 60px;
    }
    .contact-info-wrap {
      display: flex;
      flex-direction: column;
      gap: 30px;
    }
    .contact-info-item {
      display: flex;
      gap: 15px;
      align-items: flex-start;
    }
    .contact-info-icon {
      width: 44px;
      height: 44px;
      background: rgba(255, 94, 0, 0.1);
      color: var(--primary-color);
      border-radius: 8px;
      display: flex;
      align-items: center;
      justify-content: center;
      flex-shrink: 0;
    }
    .contact-info-text h4 {
      font-size: 1.1rem;
      color: var(--dark-color);
      margin-bottom: 5px;
    }
    .contact-info-text p, .contact-info-text a {
      color: #555;
      font-size: 0.95rem;
    }
    .qrcode-box {
      margin-top: 20px;
      display: flex;
      align-items: center;
      gap: 20px;
    }
    .qrcode-box img {
      width: 120px;
      height: 120px;
      border: 1px solid var(--border-color);
      border-radius: 8px;
      padding: 5px;
      background: #fff;
    }
    .qrcode-desc {
      font-size: 0.85rem;
      color: #666;
    }
    .contact-form-wrap {
      background-color: var(--light-color);
      border: 1px solid var(--border-color);
      padding: 40px;
      border-radius: 16px;
      box-shadow: 0 10px 30px rgba(255,94,0,0.04);
    }
    .form-group {
      margin-bottom: 20px;
    }
    .form-row {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 20px;
    }
    .form-label {
      display: block;
      font-size: 0.9rem;
      font-weight: 700;
      color: var(--dark-color);
      margin-bottom: 8px;
    }
    .form-control {
      width: 100%;
      padding: 12px 16px;
      border: 1px solid var(--border-color);
      border-radius: 8px;
      font-size: 0.95rem;
      color: #333;
      background-color: var(--light-color);
      transition: var(--transition);
    }
    .form-control:focus {
      outline: none;
      border-color: var(--primary-color);
      box-shadow: 0 0 0 3px rgba(255, 94, 0, 0.1);
    }
    textarea.form-control {
      resize: vertical;
      min-height: 120px;
    }

    /* Footer & Friendlinks */
    footer {
      background-color: var(--dark-color);
      color: #bbb;
      padding: 60px 0 30px;
      font-size: 0.9rem;
      border-top: 5px solid var(--primary-color);
    }
    .footer-grid {
      display: grid;
      grid-template-columns: 1.5fr 1fr 1.5fr;
      gap: 40px;
      margin-bottom: 40px;
    }
    .footer-brand h4 {
      color: var(--light-color);
      font-size: 1.3rem;
      margin-bottom: 15px;
    }
    .footer-brand p {
      line-height: 1.8;
    }
    .footer-links h4 {
      color: var(--light-color);
      font-size: 1.1rem;
      margin-bottom: 15px;
    }
    .footer-links ul {
      list-style: none;
      display: flex;
      flex-direction: column;
      gap: 10px;
    }
    .footer-links a:hover {
      color: var(--primary-color);
    }
    .friend-links {
      background: rgba(255, 255, 255, 0.05);
      border-radius: 8px;
      padding: 20px;
    }
    .friend-links h4 {
      color: var(--light-color);
      font-size: 1rem;
      margin-bottom: 12px;
    }
    .friend-links-list {
      display: flex;
      flex-wrap: wrap;
      gap: 12px;
    }
    .friend-links-list a {
      color: #aaa;
      font-size: 0.85rem;
      background: rgba(255,255,255,0.05);
      padding: 4px 10px;
      border-radius: 4px;
    }
    .friend-links-list a:hover {
      color: var(--primary-color);
      background: rgba(255,255,255,0.1);
    }
    .footer-bottom {
      border-top: 1px solid rgba(255,255,255,0.1);
      padding-top: 30px;
      display: flex;
      justify-content: space-between;
      align-items: center;
      flex-wrap: wrap;
      gap: 20px;
    }
    .footer-copyright {
      font-size: 0.8rem;
    }

    /* Floating Utilities */
    .float-widgets {
      position: fixed;
      right: 20px;
      bottom: 40px;
      display: flex;
      flex-direction: column;
      gap: 12px;
      z-index: 999;
    }
    .float-btn {
      width: 50px;
      height: 50px;
      background: var(--light-color);
      color: var(--dark-color);
      border: 1px solid var(--border-color);
      border-radius: 50%;
      display: flex;
      align-items: center;
      justify-content: center;
      cursor: pointer;
      box-shadow: 0 4px 15px rgba(0,0,0,0.1);
      transition: var(--transition);
      position: relative;
    }
    .float-btn:hover {
      background: var(--primary-color);
      color: var(--light-color);
      transform: translateY(-2px);
    }
    .float-btn svg {
      width: 22px;
      height: 22px;
    }
    .kefu-popover {
      position: absolute;
      right: 60px;
      bottom: 0;
      background: var(--light-color);
      border: 1px solid var(--border-color);
      padding: 15px;
      border-radius: 8px;
      box-shadow: 0 10px 25px rgba(0,0,0,0.15);
      display: none;
      text-align: center;
      width: 160px;
    }
    .kefu-popover img {
      width: 120px;
      height: 120px;
      margin: 0 auto 8px;
    }
    .kefu-popover span {
      font-size: 0.8rem;
      color: #333;
      font-weight: 700;
    }
    .float-btn-kefu:hover .kefu-popover {
      display: block;
    }

    /* Responsiveness */
    @media (max-width: 992px) {
      .about-grid, .contact-grid, .help-grid {
        grid-template-columns: 1fr;
        gap: 40px;
      }
      .nav-links {
        display: none;
        flex-direction: column;
        position: absolute;
        top: 80px;
        left: 0;
        width: 100%;
        background-color: var(--light-color);
        border-bottom: 1px solid var(--border-color);
        padding: 20px 0;
        box-shadow: 0 10px 15px rgba(0,0,0,0.05);
      }
      .nav-links.active {
        display: flex;
      }
      .menu-toggle {
        display: flex;
      }
      .footer-grid {
        grid-template-columns: 1fr;
        gap: 30px;
      }
    }
    @media (max-width: 768px) {
      h1.hero-title {
        font-size: 2.2rem;
      }
      .hero-buttons {
        flex-direction: column;
        align-items: center;
        gap: 15px;
      }
      .hero-buttons .btn {
        width: 100%;
        max-width: 300px;
      }
      .section-title {
        font-size: 1.8rem;
      }
      .form-row {
        grid-template-columns: 1fr;
      }
    }