:root {
      --bg-main: #060814;
      --bg-card: rgba(18, 22, 45, 0.85);
      --bg-card-hover: rgba(28, 34, 68, 0.95);
      --neon-cyan: #00f0ff;
      --neon-pink: #ff007f;
      --neon-purple: #8a2be2;
      --neon-lime: #00ff88;
      --text-main: #f0f4fc;
      --text-sub: #a6b5d6;
      --text-dim: #6c7d9c;
      --border-cyan: rgba(0, 240, 255, 0.35);
      --border-pink: rgba(255, 0, 127, 0.35);
      --border-light: rgba(255, 255, 255, 0.1);
      --glow-cyan: 0 0 20px rgba(0, 240, 255, 0.4);
      --glow-pink: 0 0 20px rgba(255, 0, 127, 0.4);
      --radius: 12px;
    }

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

    html {
      scroll-behavior: smooth;
    }

    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;
      background-image: 
        radial-gradient(circle at 15% 15%, rgba(0, 240, 255, 0.08) 0%, transparent 40%),
        radial-gradient(circle at 85% 65%, rgba(255, 0, 127, 0.08) 0%, transparent 40%),
        radial-gradient(circle at 50% 90%, rgba(138, 43, 226, 0.08) 0%, transparent 45%);
      background-attachment: fixed;
    }

    .container {
      width: 100%;
      max-width: 1240px;
      margin: 0 auto;
      padding: 0 20px;
    }

    header.site-header {
      position: sticky;
      top: 0;
      z-index: 1000;
      background: rgba(6, 8, 20, 0.9);
      backdrop-filter: blur(12px);
      border-bottom: 1px solid var(--border-light);
    }

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

    .logo-box {
      display: flex;
      align-items: center;
      gap: 12px;
      text-decoration: none;
    }

    .ai-page-logo {
      height: 40px;
      width: auto;
      display: block;
      filter: drop-shadow(0 0 8px rgba(0, 240, 255, 0.5));
    }

    .brand-text {
      font-size: 20px;
      font-weight: 800;
      color: #fff;
      letter-spacing: 1px;
      background: linear-gradient(90deg, #fff, var(--neon-cyan));
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
    }

    .nav-links {
      display: flex;
      gap: 0;
      list-style: none;
      align-items: center;
    }

    .nav-links li a {
      color: var(--text-sub);
      text-decoration: none;
      font-size: 14px;
      padding: 8px 14px;
      transition: all 0.3s ease;
      position: relative;
    }

    .nav-links li a:hover {
      color: var(--neon-cyan);
      text-shadow: 0 0 8px rgba(0, 240, 255, 0.6);
    }

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

    .btn-neon {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      padding: 10px 22px;
      font-size: 14px;
      font-weight: 600;
      color: #060814;
      background: var(--neon-cyan);
      border: 1px solid var(--neon-cyan);
      border-radius: 6px;
      text-decoration: none;
      cursor: pointer;
      box-shadow: var(--glow-cyan);
      transition: all 0.3s ease;
    }

    .btn-neon:hover {
      background: #fff;
      border-color: #fff;
      transform: translateY(-2px);
      box-shadow: 0 0 25px rgba(0, 240, 255, 0.8);
    }

    .btn-neon-pink {
      background: var(--neon-pink);
      border-color: var(--neon-pink);
      color: #fff;
      box-shadow: var(--glow-pink);
    }

    .btn-neon-pink:hover {
      background: #ff3399;
      box-shadow: 0 0 25px rgba(255, 0, 127, 0.8);
    }

    .btn-outline {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      padding: 10px 20px;
      font-size: 14px;
      font-weight: 600;
      color: var(--text-main);
      background: transparent;
      border: 1px solid var(--border-cyan);
      border-radius: 6px;
      text-decoration: none;
      transition: all 0.3s ease;
    }

    .btn-outline:hover {
      background: rgba(0, 240, 255, 0.1);
      border-color: var(--neon-cyan);
      color: var(--neon-cyan);
    }

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

    /* Hero */
    .hero-section {
      padding: 90px 0 60px;
      position: relative;
      text-align: center;
    }

    .hero-badge {
      display: inline-flex;
      align-items: center;
      gap: 8px;
      padding: 6px 16px;
      border-radius: 30px;
      background: rgba(0, 240, 255, 0.1);
      border: 1px solid var(--border-cyan);
      color: var(--neon-cyan);
      font-size: 13px;
      font-weight: 600;
      margin-bottom: 24px;
      letter-spacing: 1px;
    }

    .hero-title {
      font-size: 40px;
      font-weight: 800;
      line-height: 1.3;
      margin-bottom: 20px;
      background: linear-gradient(135deg, #ffffff 30%, #00f0ff 70%, #ff007f 100%);
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
    }

    .hero-sub {
      font-size: 18px;
      color: var(--text-sub);
      max-width: 820px;
      margin: 0 auto 36px;
    }

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

    .hero-stats-grid {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 16px;
      margin-top: 20px;
    }

    .stat-card {
      background: var(--bg-card);
      border: 1px solid var(--border-light);
      border-radius: var(--radius);
      padding: 24px 16px;
      position: relative;
      overflow: hidden;
      transition: all 0.3s ease;
    }

    .stat-card::before {
      content: "";
      position: absolute;
      top: 0;
      left: 0;
      width: 100%;
      height: 3px;
      background: linear-gradient(90deg, var(--neon-cyan), var(--neon-pink));
      opacity: 0;
      transition: opacity 0.3s ease;
    }

    .stat-card:hover {
      transform: translateY(-4px);
      border-color: var(--border-cyan);
      box-shadow: var(--glow-cyan);
    }

    .stat-card:hover::before {
      opacity: 1;
    }

    .stat-num {
      font-size: 32px;
      font-weight: 800;
      color: #fff;
      font-family: monospace;
      margin-bottom: 6px;
    }

    .stat-num span {
      color: var(--neon-cyan);
    }

    .stat-label {
      font-size: 13px;
      color: var(--text-sub);
    }

    /* Section Global */
    section {
      padding: 70px 0;
      position: relative;
    }

    .section-header {
      text-align: center;
      margin-bottom: 48px;
    }

    .section-tag {
      font-size: 12px;
      font-weight: 700;
      text-transform: uppercase;
      letter-spacing: 2px;
      color: var(--neon-cyan);
      margin-bottom: 8px;
      display: block;
    }

    .section-title {
      font-size: 30px;
      font-weight: 800;
      color: #fff;
      margin-bottom: 12px;
    }

    .section-desc {
      font-size: 15px;
      color: var(--text-sub);
      max-width: 680px;
      margin: 0 auto;
    }

    /* Platform Intro */
    .intro-grid {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 30px;
      align-items: center;
    }

    .intro-text-box {
      background: var(--bg-card);
      border: 1px solid var(--border-light);
      border-radius: var(--radius);
      padding: 32px;
    }

    .intro-text-box h3 {
      font-size: 22px;
      margin-bottom: 16px;
      color: var(--neon-cyan);
    }

    .intro-feature-list {
      list-style: none;
      margin-top: 20px;
    }

    .intro-feature-list li {
      position: relative;
      padding-left: 24px;
      margin-bottom: 12px;
      font-size: 14px;
      color: var(--text-sub);
    }

    .intro-feature-list li::before {
      content: "✦";
      position: absolute;
      left: 0;
      color: var(--neon-pink);
    }

    .intro-visual-box {
      display: flex;
      flex-direction: column;
      gap: 16px;
    }

    .model-tag-wall {
      background: var(--bg-card);
      border: 1px solid var(--border-cyan);
      border-radius: var(--radius);
      padding: 24px;
      box-shadow: inset 0 0 20px rgba(0, 240, 255, 0.05);
    }

    .tag-cloud {
      display: flex;
      flex-wrap: wrap;
      gap: 8px;
      margin-top: 12px;
    }

    .model-chip {
      background: rgba(255, 255, 255, 0.05);
      border: 1px solid var(--border-light);
      padding: 5px 12px;
      border-radius: 4px;
      font-size: 12px;
      color: var(--text-sub);
      transition: all 0.2s;
    }

    .model-chip:hover {
      border-color: var(--neon-cyan);
      color: #fff;
      box-shadow: 0 0 10px rgba(0, 240, 255, 0.3);
    }

    /* Service Cards Grid */
    .services-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 20px;
    }

    .service-card {
      background: var(--bg-card);
      border: 1px solid var(--border-light);
      border-radius: var(--radius);
      padding: 24px;
      transition: all 0.3s ease;
      display: flex;
      flex-direction: column;
      justify-content: space-between;
    }

    .service-card:hover {
      transform: translateY(-4px);
      border-color: var(--border-pink);
      box-shadow: var(--glow-pink);
    }

    .service-icon {
      font-size: 28px;
      margin-bottom: 14px;
      display: inline-block;
    }

    .service-title {
      font-size: 18px;
      font-weight: 700;
      color: #fff;
      margin-bottom: 10px;
    }

    .service-desc {
      font-size: 13px;
      color: var(--text-sub);
      line-height: 1.6;
    }

    /* Comparison Table */
    .eval-card {
      background: var(--bg-card);
      border: 1px solid var(--border-cyan);
      border-radius: var(--radius);
      padding: 32px;
      box-shadow: var(--glow-cyan);
      margin-bottom: 30px;
    }

    .eval-header {
      display: flex;
      justify-content: space-between;
      align-items: center;
      flex-wrap: wrap;
      gap: 16px;
      border-bottom: 1px solid var(--border-light);
      padding-bottom: 20px;
      margin-bottom: 24px;
    }

    .eval-score-badge {
      display: flex;
      align-items: center;
      gap: 12px;
      background: rgba(0, 240, 255, 0.1);
      padding: 8px 16px;
      border-radius: 8px;
      border: 1px solid var(--border-cyan);
    }

    .eval-score-val {
      font-size: 26px;
      font-weight: 800;
      color: var(--neon-cyan);
    }

    .table-container {
      overflow-x: auto;
    }

    .custom-table {
      width: 100%;
      border-collapse: collapse;
      text-align: left;
      font-size: 14px;
    }

    .custom-table th, .custom-table td {
      padding: 14px 16px;
      border-bottom: 1px solid var(--border-light);
    }

    .custom-table th {
      color: var(--text-main);
      background: rgba(255, 255, 255, 0.03);
      font-weight: 600;
    }

    .custom-table tr:hover td {
      background: rgba(255, 255, 255, 0.02);
    }

    .highlight-cell {
      color: var(--neon-lime);
      font-weight: 700;
    }

    /* Media/Cases Showcase */
    .case-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 20px;
    }

    .case-card {
      background: var(--bg-card);
      border: 1px solid var(--border-light);
      border-radius: var(--radius);
      overflow: hidden;
      display: flex;
      flex-direction: column;
    }

    .case-img-wrap {
      width: 100%;
      aspect-ratio: 16/9;
      background: #101428;
      overflow: hidden;
    }

    .case-img-wrap.square {
      aspect-ratio: 1/1;
    }

    .case-img-wrap img {
      width: 100%;
      height: 100%;
      object-fit: cover;
      transition: transform 0.4s ease;
    }

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

    .case-info {
      padding: 20px;
    }

    .case-info h4 {
      font-size: 16px;
      color: #fff;
      margin-bottom: 8px;
    }

    .case-info p {
      font-size: 13px;
      color: var(--text-sub);
    }

    /* Workflow Timeline */
    .timeline-grid {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 16px;
      position: relative;
    }

    .timeline-step {
      background: var(--bg-card);
      border: 1px solid var(--border-light);
      border-radius: var(--radius);
      padding: 24px 18px;
      position: relative;
    }

    .step-index {
      font-size: 24px;
      font-weight: 800;
      color: var(--neon-pink);
      font-family: monospace;
      margin-bottom: 8px;
    }

    .step-title {
      font-size: 16px;
      font-weight: 700;
      color: #fff;
      margin-bottom: 8px;
    }

    .step-desc {
      font-size: 12px;
      color: var(--text-sub);
    }

    /* Testimonials */
    .reviews-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 20px;
    }

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

    .review-text {
      font-size: 14px;
      color: var(--text-sub);
      font-style: italic;
      margin-bottom: 20px;
      line-height: 1.6;
    }

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

    .user-avatar-placeholder {
      width: 42px;
      height: 42px;
      border-radius: 50%;
      background: linear-gradient(45deg, var(--neon-cyan), var(--neon-pink));
      display: flex;
      align-items: center;
      justify-content: center;
      font-weight: 700;
      color: #060814;
    }

    .user-meta h5 {
      font-size: 14px;
      color: #fff;
    }

    .user-meta span {
      font-size: 12px;
      color: var(--neon-cyan);
    }

    /* Articles Section */
    .articles-grid {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 20px;
    }

    .article-item {
      background: var(--bg-card);
      border: 1px solid var(--border-light);
      border-radius: var(--radius);
      padding: 18px 22px;
      display: flex;
      justify-content: space-between;
      align-items: center;
      text-decoration: none;
      transition: all 0.2s;
    }

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

    .article-title {
      color: var(--text-main);
      font-size: 14px;
      font-weight: 500;
    }

    .article-link-tag {
      color: var(--neon-cyan);
      font-size: 12px;
    }

    /* FAQ Section */
    .faq-wrapper {
      max-width: 900px;
      margin: 0 auto;
      display: flex;
      flex-direction: column;
      gap: 12px;
    }

    .faq-item {
      background: var(--bg-card);
      border: 1px solid var(--border-light);
      border-radius: var(--radius);
      overflow: hidden;
      transition: border-color 0.2s;
    }

    .faq-question {
      padding: 18px 24px;
      font-size: 15px;
      font-weight: 600;
      color: #fff;
      display: flex;
      justify-content: space-between;
      align-items: center;
      cursor: pointer;
      user-select: none;
    }

    .faq-icon {
      color: var(--neon-cyan);
      font-size: 18px;
      transition: transform 0.3s;
    }

    .faq-answer {
      padding: 0 24px;
      max-height: 0;
      overflow: hidden;
      transition: max-height 0.3s ease, padding 0.3s ease;
      color: var(--text-sub);
      font-size: 14px;
      line-height: 1.6;
    }

    .faq-item.active {
      border-color: var(--border-cyan);
    }

    .faq-item.active .faq-question {
      color: var(--neon-cyan);
    }

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

    .faq-item.active .faq-answer {
      padding: 0 24px 20px 24px;
      max-height: 200px;
    }

    /* Contact & Form */
    .contact-grid {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 30px;
    }

    .form-box {
      background: var(--bg-card);
      border: 1px solid var(--border-light);
      border-radius: var(--radius);
      padding: 32px;
    }

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

    .form-group label {
      display: block;
      font-size: 13px;
      color: var(--text-sub);
      margin-bottom: 6px;
    }

    .form-control {
      width: 100%;
      background: rgba(6, 8, 20, 0.8);
      border: 1px solid var(--border-light);
      border-radius: 6px;
      padding: 12px 14px;
      color: #fff;
      font-size: 14px;
      outline: none;
      transition: border-color 0.2s;
    }

    .form-control:focus {
      border-color: var(--neon-cyan);
      box-shadow: 0 0 10px rgba(0, 240, 255, 0.2);
    }

    .contact-info-box {
      background: var(--bg-card);
      border: 1px solid var(--border-light);
      border-radius: var(--radius);
      padding: 32px;
      display: flex;
      flex-direction: column;
      justify-content: space-between;
    }

    .qr-group {
      display: flex;
      gap: 24px;
      align-items: center;
      margin-top: 20px;
      padding-top: 20px;
      border-top: 1px solid var(--border-light);
    }

    .qr-item img {
      width: 110px;
      height: 110px;
      border-radius: 8px;
      border: 1px solid var(--border-cyan);
    }

    .qr-item p {
      font-size: 12px;
      color: var(--text-sub);
      text-align: center;
      margin-top: 6px;
    }

    /* Footer */
    footer.site-footer {
      background: #03040a;
      border-top: 1px solid var(--border-light);
      padding: 50px 0 30px;
      color: var(--text-dim);
      font-size: 13px;
    }

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

    .footer-col h5 {
      color: #fff;
      font-size: 15px;
      margin-bottom: 16px;
    }

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

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

    .footer-links a, .friend-links a {
      color: var(--text-sub);
      text-decoration: none;
      transition: color 0.2s;
      display: inline-block;
      margin-right: 12px;
      margin-bottom: 6px;
    }

    .footer-links a:hover, .friend-links a:hover {
      color: var(--neon-cyan);
    }

    .footer-bottom {
      border-top: 1px solid rgba(255, 255, 255, 0.05);
      padding-top: 24px;
      display: flex;
      justify-content: space-between;
      align-items: center;
      flex-wrap: wrap;
      gap: 12px;
    }

    /* Floating CS */
    .floating-cs {
      position: fixed;
      right: 20px;
      bottom: 40px;
      z-index: 999;
      display: flex;
      flex-direction: column;
      gap: 10px;
    }

    .floating-btn {
      width: 48px;
      height: 48px;
      border-radius: 50%;
      background: var(--neon-cyan);
      border: none;
      color: #060814;
      font-size: 18px;
      display: flex;
      align-items: center;
      justify-content: center;
      cursor: pointer;
      box-shadow: var(--glow-cyan);
      transition: transform 0.2s;
      text-decoration: none;
    }

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

    .floating-btn.back-top {
      background: rgba(18, 22, 45, 0.9);
      border: 1px solid var(--border-cyan);
      color: var(--neon-cyan);
      box-shadow: none;
    }

    /* Responsive */
    @media (max-width: 992px) {
      .hero-stats-grid, .services-grid, .case-grid, .timeline-grid, .reviews-grid {
        grid-template-columns: repeat(2, 1fr);
      }
      .intro-grid, .contact-grid, .footer-top {
        grid-template-columns: 1fr;
      }
      .nav-links {
        display: none;
        position: absolute;
        top: 72px;
        left: 0;
        width: 100%;
        background: #060814;
        flex-direction: column;
        padding: 20px;
        border-bottom: 1px solid var(--border-cyan);
      }
      .nav-links.show {
        display: flex;
      }
      .menu-toggle {
        display: block;
      }
    }

    @media (max-width: 600px) {
      .hero-stats-grid, .services-grid, .case-grid, .timeline-grid, .reviews-grid, .articles-grid {
        grid-template-columns: 1fr;
      }
      .hero-title {
        font-size: 26px;
      }
      .section-title {
        font-size: 24px;
      }
    }