:root {
      --primary-grad: linear-gradient(135deg, #ff4e50 0%, #f9d423 25%, #00c9ff 50%, #92fe9d 75%, #a18cd1 100%);
      --rainbow-accent: #0066ff;
      --bg-page: #fbfbfe;
      --bg-surface: #ffffff;
      --bg-card: #ffffff;
      --bg-light: #f4f6fa;
      --text-main: #1f2937;
      --text-sub: #4b5563;
      --text-muted: #6b7280;
      --border-color: #e5e7eb;
      --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.04);
      --shadow-md: 0 8px 24px rgba(0, 0, 0, 0.06);
      --shadow-lg: 0 16px 36px rgba(0, 0, 0, 0.08);
      --radius-sm: 8px;
      --radius-md: 14px;
      --radius-lg: 20px;
      --transition: all 0.3s cubic-bezier(0.25, 0.8, 0.25, 1);
    }
    * {
      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-page);
      color: var(--text-main);
      line-height: 1.6;
      position: relative;
      overflow-x: hidden;
    }
    .rainbow-bar {
      height: 4px;
      width: 100%;
      background: var(--primary-grad);
      position: fixed;
      top: 0;
      left: 0;
      z-index: 1000;
    }
    .container {
      width: 100%;
      max-width: 1200px;
      margin: 0 auto;
      padding-left: 20px;
      padding-right: 20px;
    }
    .site-header {
      background: rgba(255, 255, 255, 0.95);
      backdrop-filter: blur(10px);
      position: sticky;
      top: 4px;
      z-index: 999;
      border-bottom: 1px solid var(--border-color);
      box-shadow: var(--shadow-sm);
    }
    .header-inner {
      display: flex;
      align-items: center;
      justify-content: space-between;
      height: 72px;
    }
    .brand-wrap {
      display: flex;
      align-items: center;
      gap: 12px;
      text-decoration: none;
      color: var(--text-main);
    }
    .brand-wrap .ai-page-logo {
      height: 42px;
      width: auto;
      display: block;
    }
    .brand-name {
      font-size: 1.25rem;
      font-weight: 700;
      letter-spacing: -0.5px;
      color: #111827;
    }
    .main-nav {
      display: flex;
      align-items: center;
    }
    .nav-links {
      display: flex;
      list-style: none;
      align-items: center;
      gap: 0;
    }
    .nav-links li a,
    .nav-links li .ai-page-home-link {
      display: inline-block;
      padding: 10px 14px;
      color: var(--text-main);
      text-decoration: none;
      font-weight: 500;
      font-size: 0.95rem;
      transition: var(--transition);
      border-radius: var(--radius-sm);
    }
    .nav-links li a:hover,
    .nav-links li .ai-page-home-link:hover {
      color: var(--rainbow-accent);
      background-color: var(--bg-light);
    }
    .nav-actions {
      display: flex;
      align-items: center;
      gap: 12px;
    }
    .btn-portal {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      padding: 9px 20px;
      border-radius: 50px;
      font-weight: 600;
      font-size: 0.9rem;
      text-decoration: none;
      background: linear-gradient(90deg, #ff4e50, #f9d423, #00c9ff);
      background-size: 200% auto;
      color: #ffffff;
      box-shadow: 0 4px 12px rgba(0, 102, 255, 0.25);
      transition: var(--transition);
      border: none;
      cursor: pointer;
    }
    .btn-portal:hover {
      background-position: right center;
      box-shadow: 0 6px 16px rgba(0, 102, 255, 0.35);
      transform: translateY(-1px);
    }
    .mobile-toggle {
      display: none;
      background: none;
      border: 1px solid var(--border-color);
      padding: 6px 10px;
      border-radius: var(--radius-sm);
      cursor: pointer;
    }
    .mobile-toggle svg {
      width: 22px;
      height: 22px;
      fill: var(--text-main);
      display: block;
    }
    .hero-section {
      padding: 70px 0 60px;
      background: radial-gradient(circle at 50% 0%, #f0f7ff 0%, #ffffff 80%);
      position: relative;
      overflow: hidden;
      border-bottom: 1px solid var(--border-color);
    }
    .hero-container {
      text-align: center;
      max-width: 900px;
      margin: 0 auto;
    }
    .hero-badge {
      display: inline-flex;
      align-items: center;
      gap: 8px;
      padding: 6px 18px;
      background: #ffffff;
      border: 1px solid #ffd0d0;
      box-shadow: var(--shadow-sm);
      border-radius: 50px;
      font-size: 0.85rem;
      font-weight: 600;
      color: #d92d20;
      margin-bottom: 24px;
    }
    .hero-badge span {
      background: var(--primary-grad);
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
    }
    .hero-title {
      font-size: 2.5rem;
      line-height: 1.25;
      font-weight: 800;
      color: #111827;
      margin-bottom: 20px;
      letter-spacing: -0.5px;
    }
    .hero-desc {
      font-size: 1.15rem;
      color: var(--text-sub);
      line-height: 1.7;
      margin-bottom: 34px;
      max-width: 760px;
      margin-left: auto;
      margin-right: auto;
    }
    .hero-btn-group {
      display: flex;
      justify-content: center;
      gap: 16px;
      flex-wrap: wrap;
      margin-bottom: 40px;
    }
    .btn-main-rainbow {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      padding: 14px 34px;
      font-size: 1.05rem;
      font-weight: 700;
      color: #ffffff;
      border-radius: 50px;
      text-decoration: none;
      background: linear-gradient(90deg, #ff4e50 0%, #ff8c00 30%, #00c9ff 70%, #92fe9d 100%);
      background-size: 200% auto;
      box-shadow: 0 8px 24px rgba(255, 78, 80, 0.3);
      transition: var(--transition);
      border: none;
    }
    .btn-main-rainbow:hover {
      background-position: right center;
      transform: translateY(-2px);
      box-shadow: 0 12px 28px rgba(0, 201, 255, 0.35);
    }
    .btn-outline {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      padding: 14px 28px;
      font-size: 1rem;
      font-weight: 600;
      color: var(--text-main);
      background: #ffffff;
      border: 1px solid var(--border-color);
      border-radius: 50px;
      text-decoration: none;
      box-shadow: var(--shadow-sm);
      transition: var(--transition);
    }
    .btn-outline:hover {
      background: var(--bg-light);
      border-color: #cbd5e1;
      transform: translateY(-1px);
    }
    .hero-metrics {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 16px;
      background: #ffffff;
      padding: 24px;
      border-radius: var(--radius-lg);
      border: 1px solid #f0f0f5;
      box-shadow: var(--shadow-md);
      margin-top: 10px;
    }
    .metric-card {
      text-align: center;
      border-right: 1px solid #f1f5f9;
    }
    .metric-card:last-child {
      border-right: none;
    }
    .metric-val {
      font-size: 1.8rem;
      font-weight: 800;
      color: #0f172a;
      line-height: 1.2;
      background: linear-gradient(135deg, #ff4e50, #0066ff);
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
    }
    .metric-txt {
      font-size: 0.85rem;
      color: var(--text-muted);
      margin-top: 4px;
      font-weight: 500;
    }
    .section-wrap {
      padding: 70px 0;
      border-bottom: 1px solid #edf2f7;
    }
    .section-wrap.alt-bg {
      background-color: #f8fafc;
    }
    .section-header {
      text-align: center;
      max-width: 720px;
      margin: 0 auto 48px;
    }
    .rainbow-tag {
      display: inline-block;
      padding: 4px 14px;
      border-radius: 20px;
      background: #eef2ff;
      color: #4338ca;
      font-size: 0.8rem;
      font-weight: 700;
      letter-spacing: 0.5px;
      margin-bottom: 10px;
      border: 1px solid #c7d2fe;
    }
    .section-title {
      font-size: 2rem;
      font-weight: 800;
      color: #0f172a;
      letter-spacing: -0.5px;
      margin-bottom: 12px;
    }
    .section-subtitle {
      font-size: 1rem;
      color: var(--text-sub);
      line-height: 1.6;
    }
    .models-cloud-box {
      background: #ffffff;
      border-radius: var(--radius-lg);
      padding: 30px;
      border: 1px solid var(--border-color);
      box-shadow: var(--shadow-sm);
    }
    .models-tags-wrap {
      display: flex;
      flex-wrap: wrap;
      gap: 10px;
      justify-content: center;
    }
    .model-badge {
      display: inline-flex;
      align-items: center;
      padding: 8px 16px;
      background: #f8fafc;
      border: 1px solid #e2e8f0;
      border-radius: 30px;
      font-size: 0.9rem;
      font-weight: 600;
      color: #334155;
      transition: var(--transition);
    }
    .model-badge:hover {
      background: #ffffff;
      border-color: #00c9ff;
      color: #0066ff;
      box-shadow: 0 4px 12px rgba(0, 201, 255, 0.15);
      transform: translateY(-2px);
    }
    .services-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 24px;
    }
    .service-card {
      background: #ffffff;
      border-radius: var(--radius-md);
      padding: 24px;
      border: 1px solid var(--border-color);
      box-shadow: var(--shadow-sm);
      transition: var(--transition);
      display: flex;
      flex-direction: column;
    }
    .service-card:hover {
      transform: translateY(-4px);
      box-shadow: var(--shadow-lg);
      border-color: #a5b4fc;
    }
    .service-icon-box {
      width: 48px;
      height: 48px;
      border-radius: 12px;
      display: flex;
      align-items: center;
      justify-content: center;
      margin-bottom: 16px;
      background: linear-gradient(135deg, rgba(255,78,80,0.1), rgba(0,201,255,0.1));
      color: var(--rainbow-accent);
    }
    .service-card h3 {
      font-size: 1.15rem;
      font-weight: 700;
      margin-bottom: 10px;
      color: #1e293b;
    }
    .service-card p {
      font-size: 0.9rem;
      color: var(--text-sub);
      line-height: 1.6;
      flex-grow: 1;
    }
    .media-case-grid {
      display: grid;
      grid-template-columns: repeat(2, 1fr);
      gap: 24px;
      margin-top: 30px;
    }
    .case-card {
      background: #ffffff;
      border-radius: var(--radius-md);
      overflow: hidden;
      border: 1px solid var(--border-color);
      box-shadow: var(--shadow-sm);
    }
    .case-img-box {
      width: 100%;
      aspect-ratio: 16 / 9;
      background: #f1f5f9;
      overflow: hidden;
    }
    .case-img-box img {
      width: 100%;
      height: 100%;
      object-fit: cover;
      display: block;
      transition: var(--transition);
    }
    .case-card:hover .case-img-box img {
      transform: scale(1.03);
    }
    .case-content {
      padding: 20px;
    }
    .case-content h4 {
      font-size: 1.1rem;
      font-weight: 700;
      margin-bottom: 8px;
      color: #0f172a;
    }
    .case-content p {
      font-size: 0.88rem;
      color: var(--text-sub);
      line-height: 1.5;
    }
    .table-container {
      width: 100%;
      overflow-x: auto;
      background: #ffffff;
      border-radius: var(--radius-lg);
      border: 1px solid var(--border-color);
      box-shadow: var(--shadow-sm);
    }
    .eval-table {
      width: 100%;
      border-collapse: collapse;
      text-align: left;
    }
    .eval-table th,
    .eval-table td {
      padding: 16px 20px;
      border-bottom: 1px solid #f1f5f9;
      font-size: 0.95rem;
    }
    .eval-table th {
      background: #f8fafc;
      font-weight: 700;
      color: #334155;
    }
    .eval-table tr:hover td {
      background-color: #fafbfc;
    }
    .eval-score-badge {
      display: inline-block;
      padding: 4px 10px;
      background: #ecfdf5;
      color: #059669;
      font-weight: 700;
      border-radius: 6px;
      border: 1px solid #a7f3d0;
    }
    .rating-banner {
      display: flex;
      align-items: center;
      justify-content: space-between;
      background: linear-gradient(135deg, #1e293b 0%, #0f172a 100%);
      color: #ffffff;
      padding: 24px 30px;
      border-radius: var(--radius-md);
      margin-bottom: 24px;
      flex-wrap: wrap;
      gap: 16px;
    }
    .rating-left h3 {
      font-size: 1.3rem;
      font-weight: 700;
      margin-bottom: 6px;
      color: #ffffff;
    }
    .rating-left p {
      font-size: 0.9rem;
      color: #94a3b8;
    }
    .rating-right {
      display: flex;
      align-items: baseline;
      gap: 8px;
    }
    .score-number {
      font-size: 2.8rem;
      font-weight: 900;
      background: linear-gradient(135deg, #f9d423, #ff4e50);
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
      line-height: 1;
    }
    .score-max {
      font-size: 1.1rem;
      color: #cbd5e1;
      font-weight: 600;
    }
    .process-timeline {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 20px;
      position: relative;
    }
    .timeline-item {
      background: #ffffff;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      padding: 24px;
      box-shadow: var(--shadow-sm);
      text-align: center;
      position: relative;
    }
    .timeline-step {
      width: 40px;
      height: 40px;
      line-height: 40px;
      border-radius: 50%;
      background: var(--primary-grad);
      color: #ffffff;
      font-weight: 800;
      margin: 0 auto 16px;
      box-shadow: 0 4px 10px rgba(0,0,0,0.1);
    }
    .timeline-item h4 {
      font-size: 1.05rem;
      font-weight: 700;
      color: #0f172a;
      margin-bottom: 8px;
    }
    .timeline-item p {
      font-size: 0.85rem;
      color: var(--text-sub);
    }
    .comments-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 20px;
    }
    .comment-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;
    }
    .comment-quote {
      font-size: 0.9rem;
      color: var(--text-main);
      line-height: 1.6;
      margin-bottom: 16px;
      position: relative;
    }
    .comment-author {
      display: flex;
      align-items: center;
      gap: 12px;
      border-top: 1px solid #f1f5f9;
      padding-top: 14px;
    }
    .author-avatar {
      width: 40px;
      height: 40px;
      border-radius: 50%;
      background: #e2e8f0;
      display: flex;
      align-items: center;
      justify-content: center;
      font-weight: 700;
      color: #475569;
    }
    .author-info h5 {
      font-size: 0.9rem;
      font-weight: 700;
      color: #0f172a;
    }
    .author-info span {
      font-size: 0.75rem;
      color: var(--text-muted);
    }
    .faq-accordion {
      max-width: 860px;
      margin: 0 auto;
      display: flex;
      flex-direction: column;
      gap: 12px;
    }
    .faq-item {
      background: #ffffff;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      overflow: hidden;
      box-shadow: var(--shadow-sm);
      transition: var(--transition);
    }
    .faq-header {
      width: 100%;
      text-align: left;
      padding: 18px 24px;
      background: none;
      border: none;
      font-size: 1rem;
      font-weight: 700;
      color: #1e293b;
      cursor: pointer;
      display: flex;
      justify-content: space-between;
      align-items: center;
    }
    .faq-header:hover {
      color: var(--rainbow-accent);
    }
    .faq-icon {
      font-size: 1.2rem;
      transition: transform 0.3s ease;
      color: var(--text-muted);
    }
    .faq-body {
      padding: 0 24px 20px;
      font-size: 0.9rem;
      color: var(--text-sub);
      line-height: 1.6;
      display: none;
    }
    .faq-item.active .faq-body {
      display: block;
    }
    .faq-item.active .faq-icon {
      transform: rotate(45deg);
      color: #ff4e50;
    }
    .contact-layout {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 40px;
      align-items: start;
    }
    .contact-info-box {
      background: #ffffff;
      padding: 32px;
      border-radius: var(--radius-lg);
      border: 1px solid var(--border-color);
      box-shadow: var(--shadow-sm);
    }
    .info-item {
      display: flex;
      align-items: flex-start;
      gap: 16px;
      margin-bottom: 20px;
    }
    .info-item h4 {
      font-size: 0.95rem;
      font-weight: 700;
      color: #0f172a;
    }
    .info-item p {
      font-size: 0.9rem;
      color: var(--text-sub);
    }
    .qr-container {
      margin-top: 24px;
      padding-top: 20px;
      border-top: 1px solid #f1f5f9;
      display: flex;
      align-items: center;
      gap: 20px;
    }
    .qr-box {
      width: 110px;
      height: 110px;
      background: #f8fafc;
      padding: 6px;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-sm);
    }
    .qr-box img {
      width: 100%;
      height: 100%;
      object-fit: contain;
      display: block;
    }
    .form-box {
      background: #ffffff;
      padding: 32px;
      border-radius: var(--radius-lg);
      border: 1px solid var(--border-color);
      box-shadow: var(--shadow-sm);
    }
    .form-group {
      margin-bottom: 18px;
    }
    .form-group label {
      display: block;
      font-size: 0.85rem;
      font-weight: 600;
      color: #334155;
      margin-bottom: 6px;
    }
    .form-control {
      width: 100%;
      padding: 12px 14px;
      font-size: 0.9rem;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-sm);
      outline: none;
      transition: var(--transition);
      background-color: #fdfdfd;
      color: var(--text-main);
    }
    .form-control:focus {
      border-color: #00c9ff;
      box-shadow: 0 0 0 3px rgba(0, 201, 255, 0.15);
      background: #ffffff;
    }
    textarea.form-control {
      resize: vertical;
      min-height: 90px;
    }
    .btn-submit {
      width: 100%;
      padding: 14px;
      border-radius: 50px;
      font-size: 1rem;
      font-weight: 700;
      color: #ffffff;
      background: linear-gradient(90deg, #ff4e50, #ff8c00, #00c9ff);
      border: none;
      cursor: pointer;
      box-shadow: 0 6px 18px rgba(0,0,0,0.1);
      transition: var(--transition);
    }
    .btn-submit:hover {
      opacity: 0.95;
      transform: translateY(-1px);
    }
    .articles-list {
      display: grid;
      grid-template-columns: repeat(2, 1fr);
      gap: 16px;
      margin-top: 24px;
    }
    .article-item {
      padding: 16px 20px;
      background: #ffffff;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      transition: var(--transition);
    }
    .article-item a {
      color: var(--text-main);
      text-decoration: none;
      font-weight: 600;
      font-size: 0.92rem;
      display: block;
    }
    .article-item:hover {
      border-color: #00c9ff;
      box-shadow: var(--shadow-sm);
      transform: translateY(-2px);
    }
    .article-item a:hover {
      color: var(--rainbow-accent);
    }
    .site-footer {
      background: #111827;
      color: #e5e7eb;
      padding: 60px 0 30px;
    }
    .footer-top {
      display: grid;
      grid-template-columns: 2fr 1fr 1fr 1fr;
      gap: 30px;
      margin-bottom: 40px;
    }
    .footer-brand p {
      font-size: 0.88rem;
      color: #9ca3af;
      margin-top: 12px;
      line-height: 1.6;
      max-width: 320px;
    }
    .footer-col h4 {
      font-size: 0.95rem;
      font-weight: 700;
      color: #ffffff;
      margin-bottom: 16px;
    }
    .footer-links {
      list-style: none;
    }
    .footer-links li {
      margin-bottom: 10px;
    }
    .footer-links a {
      color: #9ca3af;
      text-decoration: none;
      font-size: 0.85rem;
      transition: var(--transition);
    }
    .footer-links a:hover {
      color: #ffffff;
      padding-left: 2px;
    }
    .friend-links-box {
      border-top: 1px solid #1f2937;
      padding: 20px 0;
      display: flex;
      flex-wrap: wrap;
      align-items: center;
      gap: 16px;
      font-size: 0.85rem;
    }
    .friend-links-box span {
      color: #6b7280;
    }
    .friend-links-box a {
      color: #9ca3af;
      text-decoration: none;
      transition: var(--transition);
    }
    .friend-links-box a:hover {
      color: #38bdf8;
    }
    .footer-bottom {
      border-top: 1px solid #1f2937;
      padding-top: 24px;
      text-align: center;
      font-size: 0.82rem;
      color: #6b7280;
    }
    .float-widget {
      position: fixed;
      right: 20px;
      bottom: 40px;
      z-index: 998;
      display: flex;
      flex-direction: column;
      gap: 10px;
    }
    .float-btn {
      width: 48px;
      height: 48px;
      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);
      text-decoration: none;
      cursor: pointer;
      transition: var(--transition);
    }
    .float-btn:hover {
      background: var(--bg-light);
      color: var(--rainbow-accent);
      transform: scale(1.06);
    }
    .float-btn.rainbow-chat {
      background: linear-gradient(135deg, #ff4e50, #00c9ff);
      color: #ffffff;
      border: none;
    }
    @media (max-width: 992px) {
      .services-grid {
        grid-template-columns: repeat(2, 1fr);
      }
      .comments-grid {
        grid-template-columns: repeat(2, 1fr);
      }
      .process-timeline {
        grid-template-columns: repeat(2, 1fr);
      }
      .footer-top {
        grid-template-columns: 1fr 1fr;
      }
      .hero-metrics {
        grid-template-columns: repeat(2, 1fr);
      }
      .metric-card:nth-child(2) {
        border-right: none;
      }
      .metric-card:nth-child(3) {
        border-right: 1px solid #f1f5f9;
        margin-top: 12px;
      }
      .metric-card:nth-child(4) {
        margin-top: 12px;
      }
    }
    @media (max-width: 768px) {
      .mobile-toggle {
        display: block;
      }
      .main-nav {
        display: none;
        position: absolute;
        top: 72px;
        left: 0;
        width: 100%;
        background: #ffffff;
        border-bottom: 1px solid var(--border-color);
        box-shadow: var(--shadow-md);
        padding: 20px;
      }
      .main-nav.active {
        display: block;
      }
      .nav-links {
        flex-direction: column;
        align-items: flex-start;
        width: 100%;
      }
      .nav-links li {
        width: 100%;
      }
      .nav-links li a,
      .nav-links li .ai-page-home-link {
        display: block;
        padding: 12px 16px;
      }
      .nav-actions {
        margin-top: 16px;
        width: 100%;
      }
      .btn-portal {
        width: 100%;
      }
      .hero-title {
        font-size: 1.85rem;
      }
      .services-grid,
      .media-case-grid,
      .comments-grid,
      .process-timeline,
      .contact-layout,
      .articles-list {
        grid-template-columns: 1fr;
      }
      .footer-top {
        grid-template-columns: 1fr;
      }
      .hero-metrics {
        grid-template-columns: 1fr;
      }
      .metric-card {
        border-right: none;
        border-bottom: 1px solid #f1f5f9;
        padding-bottom: 12px;
      }
      .metric-card:last-child {
        border-bottom: none;
        padding-bottom: 0;
      }
    }