/* CSS Reset & Variables */
    :root {
      --primary-color: #0d53fc;
      --primary-hover: #003edc;
      --secondary-color: #00d2ff;
      --accent-color: #ff5e3a;
      --text-main: #1e293b;
      --text-muted: #64748b;
      --text-light: #94a3b8;
      --bg-main: #f8fafc;
      --bg-card: #ffffff;
      --bg-alt: #f1f5f9;
      --border-color: #e2e8f0;
      --shadow-sm: 0 2px 8px rgba(15, 23, 42, 0.04);
      --shadow-md: 0 10px 25px -5px rgba(13, 83, 252, 0.08), 0 8px 10px -6px rgba(15, 23, 42, 0.04);
      --shadow-lg: 0 20px 30px -10px rgba(13, 83, 252, 0.12);
      --radius-sm: 8px;
      --radius-md: 14px;
      --radius-lg: 20px;
      --container-max: 1200px;
      --transition: all 0.28s ease;
    }

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

    html {
      scroll-behavior: smooth;
      font-size: 16px;
    }

    body {
      font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
      background-color: var(--bg-main);
      color: var(--text-main);
      line-height: 1.6;
      -webkit-font-smoothing: antialiased;
    }

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

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

    /* Top Navigation */
    .site-header {
      position: sticky;
      top: 0;
      z-index: 1000;
      background: rgba(255, 255, 255, 0.95);
      backdrop-filter: blur(12px);
      border-bottom: 1px solid var(--border-color);
    }

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

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

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

    .brand-title {
      font-size: 1.25rem;
      font-weight: 800;
      color: var(--text-main);
      letter-spacing: -0.5px;
    }

    .brand-tag {
      font-size: 0.75rem;
      background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
      color: #ffffff;
      padding: 2px 8px;
      border-radius: 20px;
      font-weight: 600;
    }

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

    .nav-links li a {
      font-size: 0.92rem;
      font-weight: 500;
      color: var(--text-muted);
      padding: 8px 12px;
      border-radius: var(--radius-sm);
    }

    .nav-links li a:hover,
    .nav-links li a.active {
      color: var(--primary-color);
      background: rgba(13, 83, 252, 0.05);
    }

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

    .btn {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      font-weight: 600;
      font-size: 0.95rem;
      padding: 10px 22px;
      border-radius: var(--radius-md);
      cursor: pointer;
      border: 1px solid transparent;
      transition: var(--transition);
      text-align: center;
    }

    .btn-primary {
      background: linear-gradient(135deg, #0d53fc 0%, #0099ff 100%);
      color: #ffffff !important;
      box-shadow: 0 4px 14px rgba(13, 83, 252, 0.3);
    }

    .btn-primary:hover {
      transform: translateY(-2px);
      box-shadow: 0 6px 20px rgba(13, 83, 252, 0.4);
    }

    .btn-secondary {
      background: #ffffff;
      color: var(--primary-color) !important;
      border-color: #cbd5e1;
    }

    .btn-secondary:hover {
      background: var(--bg-alt);
      border-color: var(--primary-color);
    }

    .btn-sm {
      padding: 6px 14px;
      font-size: 0.85rem;
      border-radius: var(--radius-sm);
    }

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

    /* Section Typography & Utilities */
    .section-padding {
      padding: 72px 0;
    }

    .section-header {
      text-align: center;
      max-width: 780px;
      margin: 0 auto 48px auto;
    }

    .badge-pill {
      display: inline-block;
      padding: 4px 14px;
      font-size: 0.8rem;
      font-weight: 700;
      text-transform: uppercase;
      letter-spacing: 0.5px;
      border-radius: 30px;
      background: rgba(13, 83, 252, 0.08);
      color: var(--primary-color);
      margin-bottom: 12px;
    }

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

    .section-subtitle {
      font-size: 1.05rem;
      color: var(--text-muted);
      line-height: 1.6;
    }

    /* Hero Section (No Images as per rule) */
    .hero-section {
      padding: 80px 0 60px 0;
      background: radial-gradient(circle at 50% 0%, #e0f2fe 0%, #f8fafc 65%);
      position: relative;
      border-bottom: 1px solid var(--border-color);
      overflow: hidden;
    }

    .hero-content {
      text-align: center;
      max-width: 900px;
      margin: 0 auto;
    }

    .hero-tagline {
      display: inline-flex;
      align-items: center;
      gap: 8px;
      background: #ffffff;
      border: 1px solid #dbeafe;
      padding: 6px 18px;
      border-radius: 30px;
      font-size: 0.88rem;
      font-weight: 600;
      color: var(--primary-color);
      box-shadow: var(--shadow-sm);
      margin-bottom: 24px;
    }

    .hero-title {
      font-size: 2.6rem;
      font-weight: 900;
      color: #0f172a;
      line-height: 1.25;
      margin-bottom: 20px;
      letter-spacing: -1px;
    }

    .hero-title span {
      background: linear-gradient(135deg, #0d53fc, #0284c7);
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
    }

    .hero-desc {
      font-size: 1.18rem;
      color: #475569;
      max-width: 760px;
      margin: 0 auto 36px auto;
      line-height: 1.7;
    }

    .hero-cta-group {
      display: flex;
      justify-content: center;
      gap: 16px;
      margin-bottom: 48px;
      flex-wrap: wrap;
    }

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

    .hero-metric-card {
      background: #ffffff;
      border: 1px solid #e2e8f0;
      border-radius: var(--radius-md);
      padding: 20px 16px;
      text-align: center;
      box-shadow: var(--shadow-sm);
      transition: var(--transition);
    }

    .hero-metric-card:hover {
      transform: translateY(-4px);
      box-shadow: var(--shadow-md);
      border-color: #bfdbfe;
    }

    .metric-value {
      font-size: 1.8rem;
      font-weight: 800;
      color: var(--primary-color);
      display: block;
      margin-bottom: 4px;
    }

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

    /* Model Cloud Bar */
    .model-strip {
      background: #ffffff;
      border-bottom: 1px solid var(--border-color);
      padding: 18px 0;
    }

    .model-strip-inner {
      display: flex;
      align-items: center;
      gap: 20px;
      overflow-x: auto;
      white-space: nowrap;
      scrollbar-width: none;
    }

    .model-strip-inner::-webkit-scrollbar {
      display: none;
    }

    .model-strip-title {
      font-size: 0.88rem;
      font-weight: 700;
      color: var(--text-muted);
      text-transform: uppercase;
      flex-shrink: 0;
    }

    .model-tag-list {
      display: flex;
      gap: 10px;
    }

    .model-pill {
      font-size: 0.82rem;
      background: var(--bg-alt);
      color: #334155;
      padding: 4px 12px;
      border-radius: 6px;
      border: 1px solid #e2e8f0;
      font-weight: 600;
    }

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

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

    .grid-2 {
      display: grid;
      grid-template-columns: repeat(2, 1fr);
      gap: 32px;
    }

    .service-card {
      background: var(--bg-card);
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      padding: 28px 24px;
      box-shadow: var(--shadow-sm);
      transition: var(--transition);
      display: flex;
      flex-direction: column;
      justify-content: space-between;
    }

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

    .card-icon-wrap {
      width: 48px;
      height: 48px;
      border-radius: 12px;
      background: rgba(13, 83, 252, 0.08);
      color: var(--primary-color);
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 1.4rem;
      margin-bottom: 18px;
      font-weight: 800;
    }

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

    .card-desc {
      font-size: 0.92rem;
      color: var(--text-muted);
      line-height: 1.6;
      margin-bottom: 16px;
      flex-grow: 1;
    }

    .card-tag {
      font-size: 0.78rem;
      font-weight: 600;
      color: #0369a1;
      background: #e0f2fe;
      padding: 3px 10px;
      border-radius: 4px;
      align-self: flex-start;
    }

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

    .step-card {
      background: #ffffff;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      padding: 24px 20px;
      position: relative;
      box-shadow: var(--shadow-sm);
    }

    .step-num {
      width: 32px;
      height: 32px;
      border-radius: 50%;
      background: var(--primary-color);
      color: #ffffff;
      display: flex;
      align-items: center;
      justify-content: center;
      font-weight: 700;
      font-size: 0.9rem;
      margin-bottom: 14px;
    }

    .step-title {
      font-size: 1.08rem;
      font-weight: 700;
      margin-bottom: 8px;
    }

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

    /* Image Gallery Section */
    .media-card {
      background: #ffffff;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      overflow: hidden;
      box-shadow: var(--shadow-sm);
    }

    .media-img-holder {
      width: 100%;
      aspect-ratio: 16 / 9;
      background: #e2e8f0;
      overflow: hidden;
    }

    .media-img-holder.square {
      aspect-ratio: 1 / 1;
    }

    .media-img-holder img {
      width: 100%;
      height: 100%;
      object-fit: cover;
      display: block;
      transition: transform 0.4s ease;
    }

    .media-card:hover .media-img-holder img {
      transform: scale(1.03);
    }

    .media-content {
      padding: 20px;
    }

    /* Comparison Table */
    .table-responsive {
      overflow-x: auto;
      background: #ffffff;
      border-radius: var(--radius-md);
      border: 1px solid var(--border-color);
      box-shadow: var(--shadow-sm);
    }

    .custom-table {
      width: 100%;
      border-collapse: collapse;
      text-align: left;
      min-width: 680px;
    }

    .custom-table th,
    .custom-table td {
      padding: 16px 20px;
      border-bottom: 1px solid var(--border-color);
      font-size: 0.95rem;
    }

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

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

    .custom-table td.highlight {
      color: var(--primary-color);
      font-weight: 700;
      background: rgba(13, 83, 252, 0.02);
    }

    .rating-badge {
      display: inline-flex;
      align-items: center;
      gap: 6px;
      background: #fef3c7;
      color: #92400e;
      padding: 4px 12px;
      border-radius: 20px;
      font-weight: 700;
      font-size: 0.88rem;
    }

    /* Testimonials */
    .review-card {
      background: #ffffff;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      padding: 24px;
      box-shadow: var(--shadow-sm);
      display: flex;
      flex-direction: column;
      justify-content: space-between;
    }

    .review-text {
      font-size: 0.95rem;
      color: #334155;
      line-height: 1.6;
      margin-bottom: 18px;
      font-style: italic;
    }

    .reviewer-meta {
      display: flex;
      align-items: center;
      gap: 12px;
      border-top: 1px solid #f1f5f9;
      padding-top: 14px;
    }

    .reviewer-avatar {
      width: 42px;
      height: 42px;
      border-radius: 50%;
      background: linear-gradient(135deg, #38bdf8, #0d53fc);
      color: #ffffff;
      display: flex;
      align-items: center;
      justify-content: center;
      font-weight: 700;
      font-size: 1rem;
    }

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

    .reviewer-role {
      font-size: 0.82rem;
      color: var(--text-muted);
    }

    /* FAQ Accordion */
    .faq-wrapper {
      max-width: 880px;
      margin: 0 auto;
      display: flex;
      flex-direction: column;
      gap: 14px;
    }

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

    .faq-item:hover {
      border-color: #cbd5e1;
    }

    .faq-question {
      padding: 18px 24px;
      font-weight: 700;
      font-size: 1.02rem;
      cursor: pointer;
      display: flex;
      align-items: center;
      justify-content: space-between;
      user-select: none;
      color: var(--text-main);
    }

    .faq-question::after {
      content: '+';
      font-size: 1.4rem;
      font-weight: 400;
      color: var(--primary-color);
      transition: transform 0.2s ease;
    }

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

    .faq-answer {
      max-height: 0;
      overflow: hidden;
      transition: max-height 0.3s cubic-bezier(0, 1, 0, 1);
      padding: 0 24px;
      color: var(--text-muted);
      font-size: 0.95rem;
      line-height: 1.6;
    }

    .faq-item.active .faq-answer {
      max-height: 400px;
      padding: 0 24px 20px 24px;
      transition: max-height 0.4s ease-in-out;
    }

    /* Contact & Form Section */
    .contact-container {
      background: #ffffff;
      border-radius: var(--radius-lg);
      border: 1px solid var(--border-color);
      overflow: hidden;
      box-shadow: var(--shadow-md);
    }

    .contact-grid {
      display: grid;
      grid-template-columns: 1fr 1fr;
    }

    .contact-info-panel {
      background: linear-gradient(135deg, #0d53fc, #0284c7);
      color: #ffffff;
      padding: 48px;
      display: flex;
      flex-direction: column;
      justify-content: space-between;
    }

    .info-panel-title {
      font-size: 1.8rem;
      font-weight: 800;
      margin-bottom: 16px;
    }

    .info-panel-desc {
      font-size: 0.98rem;
      opacity: 0.9;
      line-height: 1.6;
      margin-bottom: 36px;
    }

    .contact-detail-list {
      list-style: none;
      display: flex;
      flex-direction: column;
      gap: 16px;
      margin-bottom: 36px;
    }

    .contact-detail-item {
      display: flex;
      align-items: center;
      gap: 12px;
      font-size: 0.95rem;
    }

    .qr-box-wrap {
      background: #ffffff;
      padding: 16px;
      border-radius: var(--radius-md);
      display: inline-block;
      width: 140px;
      text-align: center;
    }

    .qr-box-wrap img {
      width: 100%;
      height: auto;
      border-radius: 4px;
      display: block;
    }

    .qr-label {
      font-size: 0.78rem;
      color: var(--text-main);
      margin-top: 6px;
      font-weight: 600;
    }

    .contact-form-panel {
      padding: 48px;
      background: #ffffff;
    }

    .form-group {
      margin-bottom: 20px;
    }

    .form-label {
      display: block;
      font-size: 0.9rem;
      font-weight: 600;
      color: #334155;
      margin-bottom: 8px;
    }

    .form-control {
      width: 100%;
      padding: 12px 16px;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-sm);
      font-size: 0.95rem;
      font-family: inherit;
      color: var(--text-main);
      background: #f8fafc;
      transition: var(--transition);
    }

    .form-control:focus {
      outline: none;
      border-color: var(--primary-color);
      background: #ffffff;
      box-shadow: 0 0 0 3px rgba(13, 83, 252, 0.1);
    }

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

    /* Articles / Dynamic Blocks */
    .article-links-wrap {
      background: #ffffff;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      padding: 24px;
      margin-top: 24px;
    }

    .article-list {
      list-style: none;
      display: grid;
      grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
      gap: 12px;
      margin-top: 14px;
    }

    .article-item a {
      font-size: 0.9rem;
      color: var(--primary-color);
      text-decoration: underline;
      display: inline-block;
    }

    /* Footer */
    .site-footer {
      background: #0f172a;
      color: #94a3b8;
      padding: 60px 0 30px 0;
      font-size: 0.9rem;
      border-top: 1px solid #1e293b;
    }

    .footer-grid {
      display: grid;
      grid-template-columns: 2fr 1fr 1fr 1.5fr;
      gap: 40px;
      margin-bottom: 48px;
    }

    .footer-col-title {
      color: #ffffff;
      font-size: 1.05rem;
      font-weight: 700;
      margin-bottom: 18px;
    }

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

    .footer-links a {
      color: #94a3b8;
    }

    .footer-links a:hover {
      color: #ffffff;
    }

    .friend-links-area {
      display: flex;
      flex-wrap: wrap;
      gap: 12px;
    }

    .friend-links-area a {
      color: #94a3b8;
      background: #1e293b;
      padding: 4px 10px;
      border-radius: 4px;
      font-size: 0.82rem;
    }

    .friend-links-area a:hover {
      color: #38bdf8;
      background: #334155;
    }

    .footer-bottom {
      border-top: 1px solid #1e293b;
      padding-top: 28px;
      display: flex;
      justify-content: space-between;
      align-items: center;
      flex-wrap: wrap;
      gap: 16px;
    }

    .copyright {
      font-size: 0.85rem;
      color: #64748b;
    }

    /* Floating Contact */
    .floating-widget {
      position: fixed;
      right: 24px;
      bottom: 30px;
      z-index: 999;
      display: flex;
      flex-direction: column;
      gap: 12px;
    }

    .float-btn {
      width: 48px;
      height: 48px;
      border-radius: 50%;
      background: #ffffff;
      box-shadow: 0 4px 16px rgba(0, 0, 0, 0.15);
      display: flex;
      align-items: center;
      justify-content: center;
      cursor: pointer;
      border: 1px solid var(--border-color);
      color: var(--primary-color);
      font-weight: 700;
      font-size: 0.85rem;
      transition: var(--transition);
      position: relative;
    }

    .float-btn:hover {
      transform: scale(1.08);
      background: var(--primary-color);
      color: #ffffff;
    }

    .float-popover {
      position: absolute;
      right: 60px;
      bottom: 0;
      background: #ffffff;
      padding: 12px;
      border-radius: var(--radius-md);
      box-shadow: var(--shadow-lg);
      border: 1px solid var(--border-color);
      display: none;
      width: 150px;
      text-align: center;
      color: var(--text-main);
    }

    .float-btn:hover .float-popover {
      display: block;
    }

    /* Responsive Queries */
    @media (max-width: 992px) {
      .hero-title {
        font-size: 2.1rem;
      }
      .grid-4, .hero-metrics-grid, .steps-container {
        grid-template-columns: repeat(2, 1fr);
      }
      .grid-3 {
        grid-template-columns: repeat(2, 1fr);
      }
      .footer-grid {
        grid-template-columns: 1fr 1fr;
      }
      .contact-grid {
        grid-template-columns: 1fr;
      }
    }

    @media (max-width: 768px) {
      .nav-links {
        display: none;
        position: absolute;
        top: 72px;
        left: 0;
        right: 0;
        background: #ffffff;
        flex-direction: column;
        padding: 20px;
        border-bottom: 1px solid var(--border-color);
        box-shadow: var(--shadow-md);
      }
      .nav-links.show {
        display: flex;
      }
      .nav-toggle {
        display: block;
      }
      .grid-3, .grid-2, .hero-metrics-grid, .steps-container {
        grid-template-columns: 1fr;
      }
      .footer-grid {
        grid-template-columns: 1fr;
      }
      .section-title {
        font-size: 1.75rem;
      }
      .contact-info-panel, .contact-form-panel {
        padding: 28px 20px;
      }
    }