:root {
      --bg-base: #f7f9fc;
      --bg-surface: #ffffff;
      --primary: #4f46e5;
      --primary-hover: #4338ca;
      --accent: #ff007a;
      --accent-alt: #00d2ff;
      --vibrant-gradient: linear-gradient(135deg, #ff007a 0%, #7928ca 50%, #0070f3 100%);
      --vibrant-glow: radial-gradient(circle at 50% 0%, rgba(255, 0, 122, 0.12) 0%, rgba(0, 112, 243, 0.08) 50%, transparent 100%);
      --text-main: #0f172a;
      --text-secondary: #475569;
      --text-muted: #64748b;
      --border-color: #e2e8f0;
      --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.04);
      --shadow-md: 0 10px 25px -5px rgba(79, 70, 229, 0.08), 0 8px 10px -6px rgba(0, 0, 0, 0.04);
      --shadow-lg: 0 20px 30px -10px rgba(121, 40, 202, 0.12);
      --radius-sm: 8px;
      --radius-md: 14px;
      --radius-lg: 20px;
      --font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
    }
    * {
      box-sizing: border-box;
      margin: 0;
      padding: 0;
    }
    html {
      scroll-behavior: smooth;
    }
    body {
      background-color: var(--bg-base);
      background-image: var(--vibrant-glow);
      background-attachment: fixed;
      color: var(--text-main);
      font-family: var(--font-family);
      line-height: 1.6;
      -webkit-font-smoothing: antialiased;
      position: relative;
    }
    .container {
      max-width: 1200px;
      margin-left: auto;
      margin-right: auto;
      padding-left: 20px;
      padding-right: 20px;
      width: 100%;
    }
    header.site-header {
      position: sticky;
      top: 0;
      z-index: 100;
      background: rgba(255, 255, 255, 0.92);
      backdrop-filter: blur(12px);
      -webkit-backdrop-filter: blur(12px);
      border-bottom: 1px solid rgba(226, 232, 240, 0.8);
      box-shadow: 0 2px 10px rgba(0, 0, 0, 0.03);
    }
    .nav-inner {
      display: flex;
      align-items: center;
      justify-content: space-between;
      height: 72px;
    }
    .brand-wrap {
      display: flex;
      align-items: center;
      gap: 12px;
      text-decoration: none;
    }
    .brand-wrap .ai-page-logo {
      height: 40px;
      width: auto;
      object-fit: contain;
      display: block;
    }
    .brand-text {
      font-size: 20px;
      font-weight: 800;
      color: var(--text-main);
      letter-spacing: -0.5px;
    }
    .brand-text span {
      background: var(--vibrant-gradient);
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
    }
    .nav-menu {
      display: flex;
      align-items: center;
    }
    .nav-links {
      display: flex;
      align-items: center;
      gap: 0;
      list-style: none;
    }
    .nav-links li a {
      color: var(--text-secondary);
      font-weight: 600;
      font-size: 15px;
      text-decoration: none;
      padding: 8px 14px;
      border-radius: var(--radius-sm);
      transition: color 0.2s, background-color 0.2s;
    }
    .nav-links li a:hover,
    .nav-links li a.active {
      color: var(--primary);
      background-color: rgba(79, 70, 229, 0.08);
    }
    .nav-actions {
      display: flex;
      align-items: center;
      gap: 12px;
    }
    .btn {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      font-weight: 700;
      font-size: 15px;
      padding: 10px 22px;
      border-radius: 9999px;
      text-decoration: none;
      transition: all 0.25s ease;
      cursor: pointer;
      border: 1px solid transparent;
      outline: none;
    }
    .btn-primary {
      background: var(--vibrant-gradient);
      color: #ffffff;
      box-shadow: 0 4px 15px rgba(255, 0, 122, 0.3);
    }
    .btn-primary:hover {
      transform: translateY(-2px);
      box-shadow: 0 6px 20px rgba(255, 0, 122, 0.45);
      color: #ffffff;
    }
    .btn-outline {
      background: var(--bg-surface);
      color: var(--primary);
      border-color: var(--primary);
    }
    .btn-outline:hover {
      background: rgba(79, 70, 229, 0.05);
      transform: translateY(-2px);
    }
    .menu-toggle {
      display: none;
      background: none;
      border: none;
      padding: 8px;
      cursor: pointer;
      color: var(--text-main);
    }
    .menu-toggle svg {
      width: 24px;
      height: 24px;
    }
    .hero-section {
      padding: 70px 0 60px;
      text-align: center;
      position: relative;
    }
    .hero-badge {
      display: inline-flex;
      align-items: center;
      gap: 8px;
      background: #ffffff;
      padding: 6px 16px;
      border-radius: 30px;
      box-shadow: var(--shadow-sm);
      border: 1px solid var(--border-color);
      font-size: 13px;
      font-weight: 700;
      color: #ff007a;
      margin-bottom: 24px;
    }
    .hero-badge .dot {
      width: 8px;
      height: 8px;
      border-radius: 50%;
      background: #00d2ff;
      animation: pulse 2s infinite;
    }
    @keyframes pulse {
      0% { opacity: 0.4; transform: scale(0.9); }
      50% { opacity: 1; transform: scale(1.1); }
      100% { opacity: 0.4; transform: scale(0.9); }
    }
    .hero-title {
      font-size: 44px;
      line-height: 1.25;
      font-weight: 900;
      color: var(--text-main);
      margin-bottom: 20px;
      letter-spacing: -1px;
    }
    .hero-title span {
      background: var(--vibrant-gradient);
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
    }
    .hero-subtitle {
      font-size: 18px;
      color: var(--text-secondary);
      max-width: 780px;
      margin: 0 auto 36px;
      line-height: 1.7;
    }
    .hero-cta-group {
      display: flex;
      justify-content: center;
      gap: 16px;
      flex-wrap: wrap;
      margin-bottom: 48px;
    }
    .hero-stats-panel {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 20px;
      background: #ffffff;
      padding: 28px;
      border-radius: var(--radius-lg);
      border: 1px solid rgba(226, 232, 240, 0.8);
      box-shadow: var(--shadow-md);
      position: relative;
    }
    .stat-card {
      text-align: center;
      padding: 10px;
    }
    .stat-card .num {
      font-size: 32px;
      font-weight: 900;
      color: var(--primary);
      margin-bottom: 4px;
      letter-spacing: -0.5px;
    }
    .stat-card .num.rainbow {
      background: var(--vibrant-gradient);
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
    }
    .stat-card .label {
      font-size: 14px;
      color: var(--text-muted);
      font-weight: 600;
    }
    section.page-section {
      padding: 80px 0;
      position: relative;
    }
    .section-header {
      text-align: center;
      max-width: 680px;
      margin: 0 auto 50px;
    }
    .section-eyebrow {
      font-size: 14px;
      font-weight: 800;
      text-transform: uppercase;
      letter-spacing: 1px;
      color: #ff007a;
      margin-bottom: 8px;
      display: block;
    }
    .section-title {
      font-size: 32px;
      font-weight: 800;
      color: var(--text-main);
      margin-bottom: 12px;
    }
    .section-desc {
      font-size: 16px;
      color: var(--text-secondary);
      line-height: 1.6;
    }
    .model-tag-cloud {
      display: flex;
      flex-wrap: wrap;
      gap: 10px;
      justify-content: center;
      margin-top: 24px;
    }
    .model-chip {
      background: #ffffff;
      border: 1px solid var(--border-color);
      padding: 6px 14px;
      border-radius: 20px;
      font-size: 13px;
      font-weight: 700;
      color: var(--text-secondary);
      transition: all 0.2s ease;
      box-shadow: 0 1px 3px rgba(0, 0, 0, 0.03);
    }
    .model-chip:hover {
      border-color: #ff007a;
      color: #ff007a;
      transform: translateY(-2px);
    }
    .about-card-group {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 24px;
    }
    .about-item {
      background: #ffffff;
      padding: 30px;
      border-radius: var(--radius-md);
      border: 1px solid var(--border-color);
      box-shadow: var(--shadow-sm);
      transition: all 0.25s ease;
    }
    .about-item:hover {
      box-shadow: var(--shadow-lg);
      transform: translateY(-4px);
      border-color: rgba(121, 40, 202, 0.3);
    }
    .about-icon {
      width: 48px;
      height: 48px;
      border-radius: 12px;
      background: linear-gradient(135deg, rgba(255, 0, 122, 0.1) 0%, rgba(0, 112, 243, 0.1) 100%);
      display: flex;
      align-items: center;
      justify-content: center;
      color: var(--primary);
      margin-bottom: 20px;
    }
    .about-item h3 {
      font-size: 18px;
      font-weight: 800;
      margin-bottom: 12px;
      color: var(--text-main);
    }
    .about-item p {
      font-size: 14px;
      color: var(--text-secondary);
      line-height: 1.6;
    }
    .service-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 24px;
    }
    .service-card {
      background: #ffffff;
      border-radius: var(--radius-md);
      border: 1px solid var(--border-color);
      padding: 24px;
      transition: all 0.25s ease;
      display: flex;
      flex-direction: column;
      justify-content: space-between;
    }
    .service-card:hover {
      border-color: #00d2ff;
      transform: translateY(-4px);
      box-shadow: var(--shadow-md);
    }
    .service-card-top h3 {
      font-size: 18px;
      font-weight: 800;
      color: var(--text-main);
      margin-bottom: 10px;
      display: flex;
      align-items: center;
      justify-content: space-between;
    }
    .service-tag {
      font-size: 12px;
      font-weight: 600;
      padding: 2px 8px;
      border-radius: 6px;
      background: rgba(79, 70, 229, 0.1);
      color: var(--primary);
    }
    .service-card-top p {
      font-size: 14px;
      color: var(--text-secondary);
      line-height: 1.6;
      margin-bottom: 16px;
    }
    .service-features-list {
      list-style: none;
      border-top: 1px dashed var(--border-color);
      padding-top: 14px;
      margin-bottom: 16px;
    }
    .service-features-list li {
      font-size: 13px;
      color: var(--text-muted);
      margin-bottom: 6px;
      display: flex;
      align-items: center;
      gap: 6px;
    }
    .service-features-list li::before {
      content: "•";
      color: #ff007a;
      font-weight: bold;
    }
    .media-card-grid {
      display: grid;
      grid-template-columns: 2fr 1fr;
      gap: 24px;
      margin-top: 40px;
    }
    .media-block {
      background: #ffffff;
      border-radius: var(--radius-md);
      border: 1px solid var(--border-color);
      overflow: hidden;
      box-shadow: var(--shadow-sm);
    }
    .media-img-wrap {
      width: 100%;
      background: #f1f5f9;
      position: relative;
    }
    .media-img-wrap img {
      width: 100%;
      height: auto;
      display: block;
      object-fit: cover;
    }
    .media-info {
      padding: 20px;
    }
    .media-info h4 {
      font-size: 16px;
      font-weight: 800;
      margin-bottom: 6px;
      color: var(--text-main);
    }
    .media-info p {
      font-size: 13px;
      color: var(--text-secondary);
    }
    .process-timeline {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 20px;
      position: relative;
    }
    .timeline-step {
      background: #ffffff;
      padding: 24px;
      border-radius: var(--radius-md);
      border: 1px solid var(--border-color);
      position: relative;
      transition: all 0.2s ease;
    }
    .timeline-step:hover {
      border-color: var(--primary);
    }
    .step-number {
      font-size: 24px;
      font-weight: 900;
      color: #ff007a;
      margin-bottom: 12px;
      display: block;
    }
    .timeline-step h3 {
      font-size: 16px;
      font-weight: 800;
      margin-bottom: 8px;
    }
    .timeline-step p {
      font-size: 13px;
      color: var(--text-secondary);
      line-height: 1.5;
    }
    .eval-box {
      background: #ffffff;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-lg);
      padding: 36px;
      box-shadow: var(--shadow-md);
    }
    .eval-summary {
      display: flex;
      justify-content: space-between;
      align-items: center;
      padding-bottom: 24px;
      margin-bottom: 24px;
      border-bottom: 1px solid var(--border-color);
      flex-wrap: wrap;
      gap: 16px;
    }
    .eval-score-wrap {
      display: flex;
      align-items: center;
      gap: 16px;
    }
    .eval-score-num {
      font-size: 48px;
      font-weight: 900;
      line-height: 1;
      background: var(--vibrant-gradient);
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
    }
    .eval-score-desc {
      font-size: 14px;
      color: var(--text-secondary);
    }
    .eval-stars {
      color: #f59e0b;
      font-size: 18px;
      margin-bottom: 4px;
    }
    .eval-table-wrapper {
      width: 100%;
      overflow-x: auto;
    }
    .eval-table {
      width: 100%;
      border-collapse: collapse;
      text-align: left;
    }
    .eval-table th,
    .eval-table td {
      padding: 14px 18px;
      border-bottom: 1px solid var(--border-color);
      font-size: 14px;
    }
    .eval-table th {
      background: #f8fafc;
      font-weight: 700;
      color: var(--text-main);
    }
    .eval-table td.highlight {
      font-weight: 700;
      color: var(--primary);
    }
    .testimonials-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 24px;
    }
    .testimonial-card {
      background: #ffffff;
      border-radius: var(--radius-md);
      padding: 24px;
      border: 1px solid var(--border-color);
      box-shadow: var(--shadow-sm);
      display: flex;
      flex-direction: column;
      justify-content: space-between;
    }
    .testimonial-body {
      font-size: 14px;
      color: var(--text-secondary);
      line-height: 1.6;
      margin-bottom: 16px;
      font-style: italic;
    }
    .testimonial-author {
      display: flex;
      align-items: center;
      gap: 12px;
      border-top: 1px solid var(--border-color);
      padding-top: 12px;
    }
    .author-avatar {
      width: 40px;
      height: 40px;
      border-radius: 50%;
      background: linear-gradient(135deg, #ff007a, #0070f3);
      display: flex;
      align-items: center;
      justify-content: center;
      color: #ffffff;
      font-weight: 800;
      font-size: 14px;
    }
    .author-info h4 {
      font-size: 14px;
      font-weight: 700;
      color: var(--text-main);
    }
    .author-info p {
      font-size: 12px;
      color: var(--text-muted);
    }
    .faq-wrapper {
      max-width: 900px;
      margin: 0 auto;
      display: flex;
      flex-direction: column;
      gap: 12px;
    }
    .faq-item {
      background: #ffffff;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-sm);
      overflow: hidden;
      transition: all 0.2s ease;
    }
    .faq-item.active {
      border-color: var(--primary);
    }
    .faq-question {
      padding: 16px 20px;
      display: flex;
      justify-content: space-between;
      align-items: center;
      cursor: pointer;
      font-weight: 700;
      font-size: 15px;
      color: var(--text-main);
      user-select: none;
    }
    .faq-icon {
      font-size: 18px;
      line-height: 1;
      color: var(--primary);
      transition: transform 0.2s;
    }
    .faq-item.active .faq-icon {
      transform: rotate(45deg);
    }
    .faq-answer {
      max-height: 0;
      overflow: hidden;
      transition: max-height 0.3s ease, padding 0.3s ease;
      background: #f8fafc;
      font-size: 14px;
      color: var(--text-secondary);
      line-height: 1.6;
    }
    .faq-item.active .faq-answer {
      max-height: 200px;
      padding: 16px 20px;
      border-top: 1px solid var(--border-color);
    }
    .contact-grid {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 32px;
    }
    .contact-info-card {
      background: #ffffff;
      border-radius: var(--radius-lg);
      padding: 32px;
      border: 1px solid var(--border-color);
      box-shadow: var(--shadow-sm);
      display: flex;
      flex-direction: column;
      justify-content: space-between;
    }
    .contact-details-list {
      list-style: none;
      display: flex;
      flex-direction: column;
      gap: 14px;
      margin-top: 20px;
    }
    .contact-details-list li {
      font-size: 14px;
      color: var(--text-secondary);
      display: flex;
      align-items: center;
      gap: 10px;
    }
    .contact-details-list strong {
      color: var(--text-main);
      min-width: 90px;
    }
    .contact-qr-box {
      margin-top: 24px;
      display: flex;
      align-items: center;
      gap: 20px;
      background: #f8fafc;
      padding: 16px;
      border-radius: var(--radius-md);
      border: 1px dashed var(--border-color);
    }
    .contact-qr-box img {
      width: 90px;
      height: 90px;
      border-radius: var(--radius-sm);
      object-fit: cover;
    }
    .contact-qr-desc h4 {
      font-size: 14px;
      font-weight: 700;
      margin-bottom: 4px;
    }
    .contact-qr-desc p {
      font-size: 12px;
      color: var(--text-muted);
    }
    .form-card {
      background: #ffffff;
      border-radius: var(--radius-lg);
      padding: 32px;
      border: 1px solid var(--border-color);
      box-shadow: var(--shadow-md);
    }
    .form-group {
      margin-bottom: 16px;
    }
    .form-label {
      display: block;
      font-size: 13px;
      font-weight: 700;
      color: var(--text-main);
      margin-bottom: 6px;
    }
    .form-control {
      width: 100%;
      padding: 10px 14px;
      border-radius: var(--radius-sm);
      border: 1px solid var(--border-color);
      font-size: 14px;
      font-family: inherit;
      color: var(--text-main);
      background: #fbfcfe;
      transition: border-color 0.2s;
    }
    .form-control:focus {
      outline: none;
      border-color: var(--primary);
      background: #ffffff;
    }
    textarea.form-control {
      resize: vertical;
      min-height: 90px;
    }
    .articles-grid {
      display: grid;
      grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
      gap: 16px;
      margin-top: 24px;
    }
    .article-item-card {
      background: #ffffff;
      padding: 16px;
      border-radius: var(--radius-sm);
      border: 1px solid var(--border-color);
      box-shadow: var(--shadow-sm);
      transition: all 0.2s ease;
      display: flex;
      flex-direction: column;
      justify-content: space-between;
    }
    .article-item-card:hover {
      border-color: var(--primary);
      transform: translateY(-2px);
    }
    .article-item-card h4 {
      font-size: 14px;
      font-weight: 700;
      color: var(--text-main);
      margin-bottom: 8px;
    }
    .article-item-card a {
      font-size: 13px;
      color: var(--primary);
      text-decoration: none;
      font-weight: 600;
    }
    .friend-links-box {
      margin-top: 30px;
      background: #ffffff;
      padding: 20px;
      border-radius: var(--radius-md);
      border: 1px solid var(--border-color);
    }
    .friend-links-box h4 {
      font-size: 14px;
      font-weight: 800;
      color: var(--text-main);
      margin-bottom: 12px;
    }
    .friend-links-list {
      display: flex;
      flex-wrap: wrap;
      gap: 12px;
    }
    .friend-links-list a {
      font-size: 13px;
      color: var(--text-secondary);
      text-decoration: none;
      background: #f1f5f9;
      padding: 4px 10px;
      border-radius: 6px;
      transition: all 0.2s;
    }
    .friend-links-list a:hover {
      color: var(--primary);
      background: rgba(79, 70, 229, 0.1);
    }
    footer.site-footer {
      background: #ffffff;
      border-top: 1px solid var(--border-color);
      padding: 40px 0 30px;
      margin-top: 40px;
    }
    .footer-inner {
      display: flex;
      flex-direction: column;
      align-items: center;
      text-align: center;
      gap: 16px;
    }
    .footer-meta {
      font-size: 13px;
      color: var(--text-muted);
    }
    .footer-nav {
      display: flex;
      flex-wrap: wrap;
      gap: 16px;
      justify-content: center;
    }
    .footer-nav a {
      font-size: 13px;
      color: var(--text-secondary);
      text-decoration: none;
    }
    .footer-nav a:hover {
      color: var(--primary);
    }
    .floating-tools {
      position: fixed;
      right: 20px;
      bottom: 30px;
      z-index: 99;
      display: flex;
      flex-direction: column;
      gap: 10px;
    }
    .tool-btn {
      width: 44px;
      height: 44px;
      border-radius: 50%;
      background: #ffffff;
      border: 1px solid var(--border-color);
      box-shadow: var(--shadow-md);
      display: flex;
      align-items: center;
      justify-content: center;
      color: var(--text-main);
      cursor: pointer;
      text-decoration: none;
      transition: all 0.2s ease;
    }
    .tool-btn:hover {
      background: var(--primary);
      color: #ffffff;
      border-color: var(--primary);
    }
    @media (max-width: 992px) {
      .hero-title {
        font-size: 34px;
      }
      .hero-stats-panel {
        grid-template-columns: repeat(2, 1fr);
      }
      .about-card-group,
      .service-grid,
      .testimonials-grid {
        grid-template-columns: repeat(2, 1fr);
      }
      .process-timeline {
        grid-template-columns: repeat(2, 1fr);
      }
      .media-card-grid {
        grid-template-columns: 1fr;
      }
    }
    @media (max-width: 768px) {
      .menu-toggle {
        display: block;
      }
      .nav-menu {
        display: none;
        position: absolute;
        top: 72px;
        left: 0;
        width: 100%;
        background: #ffffff;
        border-bottom: 1px solid var(--border-color);
        padding: 20px;
        box-shadow: var(--shadow-md);
      }
      .nav-menu.show {
        display: block;
      }
      .nav-links {
        flex-direction: column;
        align-items: flex-start;
        gap: 8px;
        margin-bottom: 16px;
      }
      .nav-links li {
        width: 100%;
      }
      .nav-links li a {
        display: block;
        padding: 10px;
      }
      .nav-actions {
        width: 100%;
        flex-direction: column;
      }
      .nav-actions .btn {
        width: 100%;
      }
      .hero-stats-panel,
      .about-card-group,
      .service-grid,
      .testimonials-grid,
      .process-timeline,
      .contact-grid {
        grid-template-columns: 1fr;
      }
      .hero-title {
        font-size: 28px;
      }
    }