:root {
      --primary: #1e40af;
      --primary-light: #2563eb;
      --primary-bright: #0284c7;
      --accent: #f59e0b;
      --text-main: #0f172a;
      --text-muted: #475569;
      --text-light: #64748b;
      --bg-base: #f8fafc;
      --bg-card: #ffffff;
      --bg-subtle: #f1f5f9;
      --border-color: #e2e8f0;
      --radius-sm: 6px;
      --radius-md: 12px;
      --radius-lg: 18px;
      --shadow-sm: 0 1px 3px rgba(0,0,0,0.05);
      --shadow-md: 0 4px 12px rgba(15, 23, 42, 0.08);
      --shadow-lg: 0 10px 25px -5px rgba(30, 64, 175, 0.12);
      --transition: all 0.25s cubic-bezier(0.4, 0, 0.2, 1);
    }
    *, *::before, *::after {
      box-sizing: border-box;
      margin: 0;
      padding: 0;
    }
    html {
      scroll-behavior: smooth;
      font-size: 16px;
      color: var(--text-main);
      background-color: var(--bg-base);
    }
    body {
      font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
      line-height: 1.6;
      color: var(--text-main);
      background-color: var(--bg-base);
      overflow-x: hidden;
    }
    a {
      text-decoration: none;
      color: inherit;
      transition: var(--transition);
    }
    img {
      max-width: 100%;
      height: auto;
      display: block;
    }
    .container {
      width: 100%;
      max-width: 1200px;
      margin-left: auto;
      margin-right: auto;
      padding-left: 20px;
      padding-right: 20px;
    }
    .header-nav {
      position: sticky;
      top: 0;
      z-index: 1000;
      background: rgba(255, 255, 255, 0.95);
      backdrop-filter: blur(8px);
      border-bottom: 1px solid var(--border-color);
      box-shadow: var(--shadow-sm);
    }
    .nav-inner {
      display: flex;
      align-items: center;
      justify-content: space-between;
      height: 72px;
    }
    .brand-box {
      display: flex;
      align-items: center;
      gap: 12px;
    }
    .brand-logo-wrap {
      max-height: 42px;
      display: flex;
      align-items: center;
    }
    .brand-name {
      font-size: 1.25rem;
      font-weight: 700;
      color: var(--primary);
      letter-spacing: -0.5px;
    }
    .nav-links {
      display: flex;
      align-items: center;
      list-style: none;
      gap: 0;
    }
    .nav-links li a {
      padding: 8px 14px;
      font-size: 0.95rem;
      font-weight: 500;
      color: var(--text-muted);
      border-radius: var(--radius-sm);
    }
    .nav-links li a:hover {
      color: var(--primary-light);
      background-color: var(--bg-subtle);
    }
    .nav-actions {
      display: flex;
      align-items: center;
      gap: 12px;
    }
    .btn {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      padding: 10px 20px;
      font-size: 0.95rem;
      font-weight: 600;
      border-radius: var(--radius-sm);
      cursor: pointer;
      border: 1px solid transparent;
      transition: var(--transition);
      text-align: center;
    }
    .btn-primary {
      background: linear-gradient(135deg, var(--primary) 0%, var(--primary-light) 100%);
      color: #ffffff;
      box-shadow: 0 2px 6px rgba(30, 64, 175, 0.25);
    }
    .btn-primary:hover {
      background: linear-gradient(135deg, var(--primary-light) 0%, var(--primary-bright) 100%);
      transform: translateY(-1px);
      box-shadow: 0 4px 12px rgba(37, 99, 235, 0.35);
      color: #ffffff;
    }
    .btn-outline {
      background-color: transparent;
      border-color: var(--primary);
      color: var(--primary);
    }
    .btn-outline:hover {
      background-color: var(--primary);
      color: #ffffff;
    }
    .menu-toggle {
      display: none;
      background: none;
      border: none;
      font-size: 1.5rem;
      color: var(--text-main);
      cursor: pointer;
      padding: 4px;
    }
    .hero-section {
      padding: 60px 0 40px;
      background: radial-gradient(circle at 50% 20%, #eff6ff 0%, #ffffff 80%);
      border-bottom: 1px solid var(--border-color);
      text-align: center;
    }
    .hero-badge {
      display: inline-flex;
      align-items: center;
      padding: 6px 14px;
      background-color: #dbeafe;
      color: var(--primary);
      font-size: 0.85rem;
      font-weight: 600;
      border-radius: 9999px;
      margin-bottom: 20px;
      border: 1px solid #bfdbfe;
    }
    .hero-title {
      font-size: 2.2rem;
      font-weight: 800;
      color: var(--text-main);
      line-height: 1.3;
      margin-bottom: 20px;
      letter-spacing: -0.5px;
    }
    .hero-desc {
      font-size: 1.1rem;
      color: var(--text-muted);
      max-width: 780px;
      margin: 0 auto 32px;
      line-height: 1.7;
    }
    .hero-cta-group {
      display: flex;
      justify-content: center;
      gap: 16px;
      flex-wrap: wrap;
      margin-bottom: 48px;
    }
    .hero-btn-huge {
      padding: 14px 32px;
      font-size: 1.1rem;
      border-radius: var(--radius-md);
    }
    .hero-stats-grid {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 20px;
      margin-top: 20px;
    }
    .stat-card {
      background: var(--bg-card);
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      padding: 24px 16px;
      box-shadow: var(--shadow-sm);
      text-align: center;
    }
    .stat-card:hover {
      transform: translateY(-2px);
      box-shadow: var(--shadow-md);
      border-color: #bfdbfe;
    }
    .stat-label {
      font-size: 0.9rem;
      color: var(--text-light);
      margin-bottom: 6px;
    }
    .stat-value {
      font-size: 1.6rem;
      font-weight: 800;
      color: var(--primary);
    }
    .section-padding {
      padding: 70px 0;
    }
    .section-header {
      text-align: center;
      margin-bottom: 48px;
    }
    .section-subtitle {
      color: var(--primary-light);
      font-size: 0.85rem;
      font-weight: 700;
      text-transform: uppercase;
      letter-spacing: 1px;
      margin-bottom: 8px;
    }
    .section-title {
      font-size: 1.85rem;
      font-weight: 700;
      color: var(--text-main);
      margin-bottom: 12px;
    }
    .section-intro {
      font-size: 1rem;
      color: var(--text-muted);
      max-width: 680px;
      margin: 0 auto;
    }
    .about-box {
      background: var(--bg-card);
      border-radius: var(--radius-lg);
      border: 1px solid var(--border-color);
      padding: 40px;
      box-shadow: var(--shadow-sm);
    }
    .about-grid {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 36px;
      align-items: center;
    }
    .about-content h3 {
      font-size: 1.4rem;
      color: var(--primary);
      margin-bottom: 16px;
    }
    .about-content p {
      color: var(--text-muted);
      margin-bottom: 14px;
      line-height: 1.7;
    }
    .feature-check-list {
      list-style: none;
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 12px;
      margin-top: 20px;
    }
    .feature-check-list li {
      display: flex;
      align-items: center;
      font-size: 0.95rem;
      color: var(--text-main);
      gap: 8px;
    }
    .check-icon {
      color: var(--primary-bright);
      font-weight: bold;
    }
    .models-cloud-box {
      background: var(--bg-subtle);
      border-radius: var(--radius-md);
      padding: 24px;
      border: 1px solid var(--border-color);
    }
    .models-cloud-title {
      font-size: 1rem;
      font-weight: 700;
      margin-bottom: 14px;
      color: var(--primary);
      text-align: center;
    }
    .tags-flex {
      display: flex;
      flex-wrap: wrap;
      gap: 8px;
      justify-content: center;
    }
    .model-tag {
      background: #ffffff;
      border: 1px solid var(--border-color);
      padding: 6px 12px;
      border-radius: 9999px;
      font-size: 0.82rem;
      font-weight: 500;
      color: var(--text-muted);
    }
    .model-tag:hover {
      background-color: #dbeafe;
      color: var(--primary);
      border-color: #bfdbfe;
    }
    .grid-3 {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 24px;
    }
    .service-card {
      background: var(--bg-card);
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      padding: 28px;
      transition: var(--transition);
      display: flex;
      flex-direction: column;
      justify-content: space-between;
    }
    .service-card:hover {
      transform: translateY(-4px);
      box-shadow: var(--shadow-md);
      border-color: #93c5fd;
    }
    .service-icon-box {
      width: 48px;
      height: 48px;
      background-color: #eff6ff;
      color: var(--primary);
      border-radius: var(--radius-sm);
      display: flex;
      align-items: center;
      justify-content: center;
      font-weight: 800;
      font-size: 1.25rem;
      margin-bottom: 18px;
      border: 1px solid #dbeafe;
    }
    .service-card h3 {
      font-size: 1.2rem;
      margin-bottom: 10px;
      color: var(--text-main);
    }
    .service-card p {
      font-size: 0.92rem;
      color: var(--text-muted);
      line-height: 1.6;
      margin-bottom: 16px;
    }
    .service-tags-line {
      display: flex;
      gap: 6px;
      flex-wrap: wrap;
    }
    .sub-tag {
      font-size: 0.75rem;
      background: var(--bg-subtle);
      color: var(--primary);
      padding: 2px 8px;
      border-radius: 4px;
    }
    .workflow-grid {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 20px;
      position: relative;
    }
    .workflow-step {
      background: var(--bg-card);
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      padding: 24px;
      text-align: center;
      position: relative;
    }
    .step-idx {
      width: 36px;
      height: 36px;
      line-height: 36px;
      background: var(--primary);
      color: #fff;
      font-weight: 700;
      border-radius: 50%;
      margin: 0 auto 16px;
      font-size: 1rem;
    }
    .workflow-step h4 {
      font-size: 1.1rem;
      margin-bottom: 8px;
    }
    .workflow-step p {
      font-size: 0.88rem;
      color: var(--text-muted);
      line-height: 1.5;
    }
    .media-showcase-grid {
      display: grid;
      grid-template-columns: 2fr 1fr;
      gap: 24px;
      margin-top: 36px;
    }
    .media-item {
      background: var(--bg-card);
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      overflow: hidden;
      display: flex;
      flex-direction: column;
    }
    .media-img-wrap {
      aspect-ratio: 16/9;
      background-color: var(--bg-subtle);
      overflow: hidden;
      display: flex;
      align-items: center;
      justify-content: center;
    }
    .media-img-wrap.square {
      aspect-ratio: 1/1;
    }
    .media-img-wrap img {
      width: 100%;
      height: 100%;
      object-fit: cover;
      transition: transform 0.4s ease;
    }
    .media-item:hover .media-img-wrap img {
      transform: scale(1.03);
    }
    .media-info {
      padding: 18px;
    }
    .media-info h4 {
      font-size: 1.05rem;
      margin-bottom: 6px;
    }
    .media-info p {
      font-size: 0.85rem;
      color: var(--text-muted);
    }
    .banners-container {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 20px;
      margin-top: 24px;
    }
    .banner-box {
      border-radius: var(--radius-md);
      overflow: hidden;
      border: 1px solid var(--border-color);
      background: var(--bg-card);
    }
    .banner-box img {
      width: 100%;
      height: auto;
      display: block;
    }
    .eval-card {
      background: #ffffff;
      border: 2px solid #bfdbfe;
      border-radius: var(--radius-lg);
      padding: 36px;
      box-shadow: var(--shadow-lg);
    }
    .eval-header {
      display: flex;
      justify-content: space-between;
      align-items: center;
      padding-bottom: 24px;
      border-bottom: 1px solid var(--border-color);
      margin-bottom: 24px;
      flex-wrap: wrap;
      gap: 16px;
    }
    .eval-stars {
      color: var(--accent);
      font-size: 1.3rem;
      letter-spacing: 2px;
    }
    .score-badge {
      display: inline-flex;
      align-items: baseline;
      gap: 4px;
      background: #eff6ff;
      padding: 8px 18px;
      border-radius: var(--radius-md);
      border: 1px solid #bfdbfe;
    }
    .score-num {
      font-size: 2.2rem;
      font-weight: 800;
      color: var(--primary);
    }
    .score-max {
      font-size: 1rem;
      color: var(--text-light);
    }
    .table-wrap {
      width: 100%;
      overflow-x: auto;
      margin-top: 16px;
    }
    .custom-table {
      width: 100%;
      border-collapse: collapse;
      text-align: left;
      font-size: 0.95rem;
    }
    .custom-table th, .custom-table td {
      padding: 16px;
      border-bottom: 1px solid var(--border-color);
    }
    .custom-table th {
      background-color: var(--bg-subtle);
      font-weight: 700;
      color: var(--text-main);
    }
    .custom-table td:nth-child(2) {
      background-color: #eff6ff;
      font-weight: 600;
      color: var(--primary);
    }
    .custom-table tr:hover td {
      background-color: #f8fafc;
    }
    .reviews-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 24px;
    }
    .review-card {
      background: var(--bg-card);
      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: 0.92rem;
      color: var(--text-muted);
      line-height: 1.6;
      margin-bottom: 16px;
      position: relative;
    }
    .review-user-info {
      display: flex;
      align-items: center;
      gap: 12px;
      padding-top: 12px;
      border-top: 1px solid var(--border-color);
    }
    .user-avatar-char {
      width: 40px;
      height: 40px;
      border-radius: 50%;
      background: linear-gradient(135deg, var(--primary) 0%, var(--primary-light) 100%);
      color: #ffffff;
      display: flex;
      align-items: center;
      justify-content: center;
      font-weight: 700;
      font-size: 1rem;
    }
    .user-details h5 {
      font-size: 0.95rem;
      color: var(--text-main);
    }
    .user-details span {
      font-size: 0.8rem;
      color: var(--text-light);
    }
    .faq-container {
      max-width: 900px;
      margin: 0 auto;
    }
    .faq-item {
      background: var(--bg-card);
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      margin-bottom: 12px;
      overflow: hidden;
      transition: var(--transition);
    }
    .faq-item.active {
      border-color: #93c5fd;
      box-shadow: var(--shadow-sm);
    }
    .faq-header {
      padding: 18px 24px;
      cursor: pointer;
      display: flex;
      justify-content: space-between;
      align-items: center;
      font-weight: 600;
      color: var(--text-main);
      user-select: none;
    }
    .faq-header:hover {
      color: var(--primary);
    }
    .faq-icon {
      font-size: 1.2rem;
      transition: transform 0.25s ease;
      color: var(--primary-light);
    }
    .faq-item.active .faq-icon {
      transform: rotate(45deg);
    }
    .faq-content {
      padding: 0 24px;
      max-height: 0;
      overflow: hidden;
      transition: max-height 0.3s ease, padding 0.3s ease;
      color: var(--text-muted);
      font-size: 0.92rem;
      line-height: 1.6;
    }
    .faq-item.active .faq-content {
      padding: 0 24px 20px;
      max-height: 300px;
    }
    .form-section-box {
      background: var(--bg-card);
      border: 1px solid var(--border-color);
      border-radius: var(--radius-lg);
      padding: 40px;
      box-shadow: var(--shadow-md);
    }
    .form-grid-layout {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 36px;
    }
    .form-group {
      margin-bottom: 20px;
    }
    .form-group label {
      display: block;
      font-size: 0.9rem;
      font-weight: 600;
      color: var(--text-main);
      margin-bottom: 8px;
    }
    .form-control {
      width: 100%;
      padding: 12px 14px;
      font-size: 0.95rem;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-sm);
      background-color: var(--bg-base);
      color: var(--text-main);
      transition: var(--transition);
      outline: none;
    }
    .form-control:focus {
      border-color: var(--primary);
      background-color: #ffffff;
      box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.15);
    }
    textarea.form-control {
      min-height: 110px;
      resize: vertical;
    }
    .contact-info-list {
      list-style: none;
      margin-top: 20px;
      display: flex;
      flex-direction: column;
      gap: 14px;
    }
    .contact-info-item {
      display: flex;
      align-items: center;
      gap: 12px;
      font-size: 0.95rem;
      color: var(--text-muted);
    }
    .contact-info-item strong {
      color: var(--text-main);
      min-width: 90px;
    }
    .qr-card-wrap {
      margin-top: 24px;
      display: inline-flex;
      flex-direction: column;
      align-items: center;
      padding: 16px;
      background: var(--bg-subtle);
      border-radius: var(--radius-md);
      border: 1px solid var(--border-color);
    }
    .qr-img-box {
      width: 140px;
      height: 140px;
      background: #ffffff;
      border-radius: var(--radius-sm);
      overflow: hidden;
      margin-bottom: 8px;
    }
    .articles-grid {
      display: grid;
      grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
      gap: 16px;
    }
    .article-item {
      background: var(--bg-card);
      border: 1px solid var(--border-color);
      border-radius: var(--radius-sm);
      padding: 16px;
      transition: var(--transition);
      display: flex;
      flex-direction: column;
      justify-content: space-between;
    }
    .article-item:hover {
      border-color: var(--primary-light);
      box-shadow: var(--shadow-sm);
      transform: translateY(-2px);
    }
    .article-item h4 {
      font-size: 0.95rem;
      color: var(--text-main);
      margin-bottom: 8px;
    }
    .article-meta {
      font-size: 0.8rem;
      color: var(--text-light);
      display: flex;
      justify-content: space-between;
    }
    .articles-shortcode-box {
      background: #ffffff;
      border: 1px dashed #93c5fd;
      border-radius: var(--radius-sm);
      padding: 12px 18px;
      margin-bottom: 20px;
      font-size: 0.9rem;
      color: var(--primary);
    }
    .articles-links-flex {
      display: flex;
      flex-wrap: wrap;
      gap: 12px;
      margin-top: 14px;
    }
    .articles-links-flex a {
      font-size: 0.85rem;
      color: var(--primary-light);
      background: #eff6ff;
      padding: 4px 10px;
      border-radius: 4px;
      border: 1px solid #bfdbfe;
    }
    .articles-links-flex a:hover {
      background: var(--primary);
      color: #ffffff;
    }
    .agent-box {
      background: linear-gradient(135deg, #eff6ff 0%, #dbeafe 100%);
      border: 1px solid #bfdbfe;
      border-radius: var(--radius-lg);
      padding: 40px;
      display: flex;
      justify-content: space-between;
      align-items: center;
      gap: 24px;
      flex-wrap: wrap;
    }
    .agent-content {
      max-width: 700px;
    }
    .agent-content h3 {
      font-size: 1.5rem;
      color: var(--primary);
      margin-bottom: 12px;
    }
    .agent-content p {
      font-size: 0.95rem;
      color: var(--text-muted);
      line-height: 1.6;
    }
    .footer-section {
      background-color: #0f172a;
      color: #94a3b8;
      padding: 60px 0 24px;
      border-top: 1px solid #1e293b;
    }
    .footer-grid {
      display: grid;
      grid-template-columns: 2fr 1fr 1fr 1fr;
      gap: 36px;
      margin-bottom: 48px;
    }
    .footer-col h4 {
      font-size: 1.05rem;
      color: #f8fafc;
      margin-bottom: 18px;
      position: relative;
    }
    .footer-links-list {
      list-style: none;
      display: flex;
      flex-direction: column;
      gap: 10px;
    }
    .footer-links-list a {
      color: #94a3b8;
      font-size: 0.9rem;
    }
    .footer-links-list a:hover {
      color: #38bdf8;
    }
    .friend-links-wrap {
      display: flex;
      flex-wrap: wrap;
      gap: 10px;
    }
    .friend-links-wrap a {
      display: inline-block;
      font-size: 0.82rem;
      color: #cbd5e1;
      background: #1e293b;
      padding: 4px 10px;
      border-radius: 4px;
      border: 1px solid #334155;
    }
    .friend-links-wrap a:hover {
      background: var(--primary);
      color: #ffffff;
      border-color: var(--primary-light);
    }
    .footer-bottom {
      text-align: center;
      padding-top: 24px;
      border-top: 1px solid #1e293b;
      font-size: 0.85rem;
      color: #64748b;
    }
    .floating-widget {
      position: fixed;
      right: 20px;
      bottom: 24px;
      z-index: 999;
      display: flex;
      flex-direction: column;
      gap: 10px;
    }
    .widget-btn {
      width: 48px;
      height: 48px;
      border-radius: 50%;
      background: var(--primary);
      color: #ffffff;
      display: flex;
      align-items: center;
      justify-content: center;
      box-shadow: 0 4px 14px rgba(0, 0, 0, 0.2);
      cursor: pointer;
      border: none;
      font-size: 1.1rem;
      transition: var(--transition);
      position: relative;
    }
    .widget-btn:hover {
      background: var(--primary-light);
      transform: scale(1.06);
    }
    .widget-qr-popup {
      position: absolute;
      right: 58px;
      bottom: 0;
      background: #ffffff;
      padding: 12px;
      border-radius: var(--radius-md);
      box-shadow: var(--shadow-lg);
      border: 1px solid var(--border-color);
      width: 150px;
      display: none;
      text-align: center;
    }
    .widget-qr-popup p {
      font-size: 0.75rem;
      color: var(--text-main);
      margin-top: 6px;
    }
    .widget-btn:hover .widget-qr-popup {
      display: block;
    }
    @media (max-width: 1024px) {
      .hero-stats-grid {
        grid-template-columns: repeat(2, 1fr);
      }
      .about-grid {
        grid-template-columns: 1fr;
      }
      .grid-3 {
        grid-template-columns: repeat(2, 1fr);
      }
      .workflow-grid {
        grid-template-columns: repeat(2, 1fr);
      }
      .reviews-grid {
        grid-template-columns: repeat(2, 1fr);
      }
      .footer-grid {
        grid-template-columns: 1fr 1fr;
      }
    }
    @media (max-width: 768px) {
      .menu-toggle {
        display: block;
      }
      .nav-links {
        position: absolute;
        top: 72px;
        left: 0;
        right: 0;
        background: #ffffff;
        flex-direction: column;
        align-items: stretch;
        padding: 16px;
        border-bottom: 1px solid var(--border-color);
        box-shadow: var(--shadow-md);
        display: none;
      }
      .nav-links.active {
        display: flex;
      }
      .nav-links li a {
        padding: 12px 16px;
      }
      .hero-title {
        font-size: 1.7rem;
      }
      .hero-stats-grid {
        grid-template-columns: 1fr 1fr;
      }
      .grid-3 {
        grid-template-columns: 1fr;
      }
      .workflow-grid {
        grid-template-columns: 1fr;
      }
      .media-showcase-grid {
        grid-template-columns: 1fr;
      }
      .banners-container {
        grid-template-columns: 1fr;
      }
      .reviews-grid {
        grid-template-columns: 1fr;
      }
      .form-grid-layout {
        grid-template-columns: 1fr;
      }
      .footer-grid {
        grid-template-columns: 1fr;
      }
      .agent-box {
        text-align: center;
        justify-content: center;
      }
    }