:root {
      --primary-color: #7b2cbf;
      --primary-hover: #5a189a;
      --primary-light: #f3e8ff;
      --primary-gradient: linear-gradient(135deg, #7b2cbf 0%, #9d4edd 50%, #c77dff 100%);
      --accent-glow: rgba(157, 78, 221, 0.18);
      --bg-base: #faf8ff;
      --bg-surface: #ffffff;
      --bg-alt: #f5f0fb;
      --text-main: #1f1a24;
      --text-muted: #5c5468;
      --text-light: #8e829d;
      --border-color: #e5daf3;
      --card-border: #ebdff7;
      --shadow-sm: 0 4px 12px rgba(123, 44, 191, 0.06);
      --shadow-md: 0 8px 24px rgba(123, 44, 191, 0.09);
      --shadow-lg: 0 16px 36px rgba(123, 44, 191, 0.12);
      --radius-sm: 8px;
      --radius-md: 14px;
      --radius-lg: 20px;
      --transition: all 0.28s cubic-bezier(0.4, 0, 0.2, 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-base);
      color: var(--text-main);
      line-height: 1.65;
      overflow-x: hidden;
    }
    a {
      color: inherit;
      text-decoration: none;
      transition: var(--transition);
    }
    ul, ol {
      list-style: none;
    }
    .container {
      width: 100%;
      max-width: 1200px;
      margin-left: auto;
      margin-right: auto;
      padding-left: 20px;
      padding-right: 20px;
    }
    .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);
      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;
    }
    .brand-wrap .ai-page-logo {
      height: 40px;
      width: auto;
      object-fit: contain;
    }
    .brand-title {
      font-size: 1.25rem;
      font-weight: 700;
      color: var(--primary-hover);
      letter-spacing: -0.5px;
    }
    .nav-links {
      display: flex;
      align-items: center;
      gap: 0;
    }
    .nav-link-item {
      display: inline-block;
      padding: 8px 14px;
      font-size: 0.95rem;
      font-weight: 500;
      color: var(--text-muted);
      border-radius: var(--radius-sm);
    }
    .nav-link-item:hover {
      color: var(--primary-color);
      background: var(--primary-light);
    }
    .header-actions {
      display: flex;
      align-items: center;
      gap: 12px;
    }
    .btn {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      padding: 10px 22px;
      font-size: 0.95rem;
      font-weight: 600;
      border-radius: var(--radius-md);
      cursor: pointer;
      border: 1px solid transparent;
      transition: var(--transition);
      text-align: center;
    }
    .btn-primary {
      background: var(--primary-gradient);
      color: #ffffff;
      box-shadow: 0 4px 14px rgba(123, 44, 191, 0.3);
    }
    .btn-primary:hover {
      opacity: 0.92;
      transform: translateY(-2px);
      box-shadow: 0 6px 20px rgba(123, 44, 191, 0.4);
      color: #ffffff;
    }
    .btn-outline {
      border-color: var(--primary-color);
      color: var(--primary-color);
      background: #ffffff;
    }
    .btn-outline:hover {
      background: var(--primary-light);
      color: var(--primary-hover);
    }
    .btn-large {
      padding: 14px 32px;
      font-size: 1.05rem;
    }
    .mobile-menu-toggle {
      display: none;
      background: none;
      border: none;
      font-size: 1.5rem;
      color: var(--primary-color);
      cursor: pointer;
    }
    .section-padding {
      padding: 80px 0;
    }
    .section-header {
      text-align: center;
      max-width: 760px;
      margin: 0 auto 50px auto;
    }
    .section-tag {
      display: inline-block;
      padding: 4px 14px;
      background: var(--primary-light);
      color: var(--primary-color);
      border-radius: 20px;
      font-size: 0.85rem;
      font-weight: 600;
      margin-bottom: 12px;
    }
    .section-title {
      font-size: 2.1rem;
      font-weight: 800;
      color: var(--text-main);
      line-height: 1.35;
      margin-bottom: 14px;
    }
    .section-desc {
      font-size: 1.05rem;
      color: var(--text-muted);
    }
    .hero-section {
      position: relative;
      padding: 90px 0 70px 0;
      background: radial-gradient(circle at 50% 10%, #edd8ff 0%, #faf8ff 70%);
      border-bottom: 1px solid var(--border-color);
    }
    .hero-content {
      text-align: center;
      max-width: 880px;
      margin: 0 auto;
    }
    .hero-badge {
      display: inline-flex;
      align-items: center;
      gap: 8px;
      padding: 6px 18px;
      background: #ffffff;
      border: 1px solid var(--card-border);
      border-radius: 30px;
      font-size: 0.9rem;
      color: var(--primary-color);
      font-weight: 600;
      box-shadow: var(--shadow-sm);
      margin-bottom: 24px;
    }
    .hero-title {
      font-size: 2.7rem;
      font-weight: 800;
      color: #2b0b4b;
      line-height: 1.25;
      margin-bottom: 22px;
      letter-spacing: -0.5px;
    }
    .hero-subtitle {
      font-size: 1.18rem;
      color: var(--text-muted);
      line-height: 1.7;
      margin-bottom: 36px;
    }
    .hero-btns {
      display: flex;
      justify-content: center;
      gap: 16px;
      margin-bottom: 50px;
      flex-wrap: wrap;
    }
    .hero-metrics {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 20px;
      margin-top: 20px;
    }
    .metric-card {
      background: #ffffff;
      border: 1px solid var(--card-border);
      padding: 24px 16px;
      border-radius: var(--radius-md);
      box-shadow: var(--shadow-sm);
      text-align: center;
      transition: var(--transition);
    }
    .metric-card:hover {
      transform: translateY(-4px);
      box-shadow: var(--shadow-md);
      border-color: var(--primary-color);
    }
    .metric-val {
      font-size: 1.9rem;
      font-weight: 800;
      color: var(--primary-color);
      margin-bottom: 4px;
    }
    .metric-label {
      font-size: 0.9rem;
      color: var(--text-muted);
      font-weight: 500;
    }
    .about-card {
      background: #ffffff;
      border: 1px solid var(--card-border);
      border-radius: var(--radius-lg);
      padding: 44px;
      box-shadow: var(--shadow-sm);
      margin-bottom: 30px;
    }
    .about-grid {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 40px;
      align-items: center;
    }
    .feature-list {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 16px;
      margin-top: 24px;
    }
    .feature-item {
      display: flex;
      align-items: flex-start;
      gap: 10px;
      background: var(--bg-alt);
      padding: 14px 16px;
      border-radius: var(--radius-sm);
      border-left: 3px solid var(--primary-color);
    }
    .feature-item h4 {
      font-size: 0.98rem;
      font-weight: 700;
      color: var(--text-main);
      margin-bottom: 2px;
    }
    .feature-item p {
      font-size: 0.85rem;
      color: var(--text-muted);
    }
    .models-cloud {
      display: flex;
      flex-wrap: wrap;
      gap: 10px;
      margin-top: 20px;
    }
    .model-tag {
      background: var(--primary-light);
      color: var(--primary-hover);
      padding: 6px 14px;
      border-radius: 8px;
      font-size: 0.88rem;
      font-weight: 600;
      border: 1px solid var(--card-border);
      transition: var(--transition);
    }
    .model-tag:hover {
      background: var(--primary-color);
      color: #ffffff;
      transform: translateY(-2px);
    }
    .service-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 24px;
    }
    .service-card {
      background: #ffffff;
      border: 1px solid var(--card-border);
      border-radius: var(--radius-md);
      padding: 28px;
      box-shadow: var(--shadow-sm);
      transition: var(--transition);
      display: flex;
      flex-direction: column;
    }
    .service-card:hover {
      transform: translateY(-6px);
      box-shadow: var(--shadow-lg);
      border-color: var(--primary-color);
    }
    .service-icon {
      width: 52px;
      height: 52px;
      background: var(--primary-light);
      color: var(--primary-color);
      border-radius: 12px;
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 1.4rem;
      margin-bottom: 20px;
      font-weight: 800;
    }
    .service-card h3 {
      font-size: 1.22rem;
      font-weight: 700;
      color: var(--text-main);
      margin-bottom: 12px;
    }
    .service-card p {
      font-size: 0.92rem;
      color: var(--text-muted);
      line-height: 1.6;
      margin-bottom: 16px;
      flex-grow: 1;
    }
    .service-card-meta {
      padding-top: 14px;
      border-top: 1px dashed var(--border-color);
      font-size: 0.85rem;
      color: var(--primary-color);
      font-weight: 600;
    }
    .workflow-grid {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 20px;
      position: relative;
    }
    .workflow-step {
      background: #ffffff;
      border: 1px solid var(--card-border);
      border-radius: var(--radius-md);
      padding: 28px 20px;
      text-align: center;
      box-shadow: var(--shadow-sm);
      transition: var(--transition);
    }
    .workflow-step:hover {
      transform: translateY(-4px);
      border-color: var(--primary-color);
      box-shadow: var(--shadow-md);
    }
    .step-num {
      width: 44px;
      height: 44px;
      line-height: 44px;
      background: var(--primary-gradient);
      color: #ffffff;
      border-radius: 50%;
      margin: 0 auto 16px auto;
      font-weight: 800;
      font-size: 1.1rem;
    }
    .workflow-step h3 {
      font-size: 1.1rem;
      font-weight: 700;
      margin-bottom: 8px;
    }
    .workflow-step p {
      font-size: 0.88rem;
      color: var(--text-muted);
    }
    .solution-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 24px;
    }
    .solution-card {
      background: #ffffff;
      border: 1px solid var(--card-border);
      border-radius: var(--radius-md);
      padding: 26px;
      box-shadow: var(--shadow-sm);
    }
    .solution-badge {
      display: inline-block;
      padding: 4px 10px;
      background: var(--bg-alt);
      color: var(--primary-hover);
      border-radius: 6px;
      font-size: 0.8rem;
      font-weight: 600;
      margin-bottom: 12px;
    }
    .solution-card h3 {
      font-size: 1.15rem;
      font-weight: 700;
      margin-bottom: 10px;
    }
    .solution-card p {
      font-size: 0.9rem;
      color: var(--text-muted);
      line-height: 1.6;
    }
    .gallery-grid {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 24px;
      margin-bottom: 30px;
    }
    .gallery-item {
      background: #ffffff;
      border: 1px solid var(--card-border);
      border-radius: var(--radius-md);
      overflow: hidden;
      box-shadow: var(--shadow-sm);
      display: flex;
      flex-direction: column;
    }
    .gallery-img-wrap {
      width: 100%;
      background: var(--bg-alt);
      aspect-ratio: 16 / 9;
      display: flex;
      align-items: center;
      justify-content: center;
      overflow: hidden;
    }
    .gallery-img-wrap img {
      width: 100%;
      height: 100%;
      object-fit: cover;
      display: block;
      transition: transform 0.4s ease;
    }
    .gallery-item:hover .gallery-img-wrap img {
      transform: scale(1.03);
    }
    .gallery-text {
      padding: 20px;
    }
    .gallery-text h4 {
      font-size: 1.1rem;
      font-weight: 700;
      margin-bottom: 6px;
    }
    .gallery-text p {
      font-size: 0.88rem;
      color: var(--text-muted);
    }
    .table-container {
      background: #ffffff;
      border: 1px solid var(--card-border);
      border-radius: var(--radius-md);
      overflow-x: auto;
      box-shadow: var(--shadow-sm);
    }
    .custom-table {
      width: 100%;
      border-collapse: collapse;
      text-align: left;
      font-size: 0.95rem;
    }
    .custom-table th, .custom-table td {
      padding: 16px 20px;
      border-bottom: 1px solid var(--border-color);
    }
    .custom-table th {
      background: var(--primary-light);
      color: var(--primary-hover);
      font-weight: 700;
    }
    .custom-table tr:last-child td {
      border-bottom: none;
    }
    .custom-table tr:hover {
      background: var(--bg-alt);
    }
    .highlight-cell {
      color: var(--primary-color);
      font-weight: 700;
    }
    .rating-badge {
      display: inline-flex;
      align-items: center;
      gap: 6px;
      background: #fef08a;
      color: #854d0e;
      padding: 4px 12px;
      border-radius: 20px;
      font-size: 0.85rem;
      font-weight: 700;
    }
    .review-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 24px;
    }
    .review-card {
      background: #ffffff;
      border: 1px solid var(--card-border);
      border-radius: var(--radius-md);
      padding: 26px;
      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: 1.65;
      margin-bottom: 20px;
      font-style: italic;
    }
    .review-user {
      display: flex;
      align-items: center;
      gap: 12px;
      border-top: 1px dashed var(--border-color);
      padding-top: 14px;
    }
    .user-avatar {
      width: 44px;
      height: 44px;
      background: var(--primary-light);
      color: var(--primary-color);
      border-radius: 50%;
      display: flex;
      align-items: center;
      justify-content: center;
      font-weight: 700;
      font-size: 1.1rem;
    }
    .user-meta h4 {
      font-size: 0.95rem;
      font-weight: 700;
      color: var(--text-main);
    }
    .user-meta span {
      font-size: 0.82rem;
      color: var(--text-light);
    }
    .faq-container {
      max-width: 900px;
      margin: 0 auto;
    }
    .faq-item {
      background: #ffffff;
      border: 1px solid var(--card-border);
      border-radius: var(--radius-md);
      margin-bottom: 14px;
      overflow: hidden;
      box-shadow: var(--shadow-sm);
    }
    .faq-question {
      padding: 20px 24px;
      font-size: 1.05rem;
      font-weight: 700;
      color: var(--text-main);
      cursor: pointer;
      display: flex;
      justify-content: space-between;
      align-items: center;
      background: #ffffff;
      transition: var(--transition);
    }
    .faq-question:hover {
      color: var(--primary-color);
      background: var(--bg-alt);
    }
    .faq-icon {
      font-size: 1.2rem;
      transition: transform 0.3s ease;
      color: var(--primary-color);
    }
    .faq-answer {
      max-height: 0;
      overflow: hidden;
      transition: max-height 0.35s ease, padding 0.35s ease;
      background: #ffffff;
      padding: 0 24px;
      font-size: 0.95rem;
      color: var(--text-muted);
      line-height: 1.7;
    }
    .faq-item.active .faq-answer {
      max-height: 300px;
      padding: 16px 24px 24px 24px;
      border-top: 1px solid var(--border-color);
    }
    .faq-item.active .faq-icon {
      transform: rotate(45deg);
    }
    .agent-card {
      background: linear-gradient(135deg, #7b2cbf 0%, #4a148c 100%);
      color: #ffffff;
      border-radius: var(--radius-lg);
      padding: 50px 40px;
      box-shadow: var(--shadow-lg);
      text-align: center;
      margin-bottom: 40px;
    }
    .agent-card h2 {
      font-size: 2.2rem;
      font-weight: 800;
      margin-bottom: 16px;
    }
    .agent-card p {
      font-size: 1.1rem;
      opacity: 0.9;
      max-width: 760px;
      margin: 0 auto 30px auto;
    }
    .agent-perks {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 20px;
      margin-bottom: 36px;
    }
    .perk-item {
      background: rgba(255, 255, 255, 0.12);
      border: 1px solid rgba(255, 255, 255, 0.2);
      padding: 20px 14px;
      border-radius: var(--radius-md);
      backdrop-filter: blur(8px);
    }
    .perk-item h4 {
      font-size: 1.05rem;
      margin-bottom: 6px;
    }
    .perk-item p {
      font-size: 0.85rem;
      opacity: 0.8;
      margin: 0;
    }
    .contact-grid {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 36px;
    }
    .contact-box {
      background: #ffffff;
      border: 1px solid var(--card-border);
      border-radius: var(--radius-md);
      padding: 36px;
      box-shadow: var(--shadow-sm);
    }
    .contact-info-list {
      margin-top: 20px;
    }
    .contact-info-item {
      display: flex;
      align-items: center;
      gap: 14px;
      margin-bottom: 18px;
      font-size: 0.98rem;
    }
    .qr-container {
      margin-top: 24px;
      padding: 20px;
      background: var(--bg-alt);
      border-radius: var(--radius-md);
      text-align: center;
      display: inline-block;
    }
    .qr-container img {
      max-width: 140px;
      height: auto;
      border-radius: var(--radius-sm);
      margin-bottom: 8px;
      border: 1px solid var(--border-color);
    }
    .form-group {
      margin-bottom: 18px;
    }
    .form-group label {
      display: block;
      font-size: 0.9rem;
      font-weight: 600;
      color: var(--text-main);
      margin-bottom: 6px;
    }
    .form-control {
      width: 100%;
      padding: 12px 14px;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-sm);
      font-size: 0.95rem;
      font-family: inherit;
      background: #ffffff;
      color: var(--text-main);
      transition: var(--transition);
    }
    .form-control:focus {
      outline: none;
      border-color: var(--primary-color);
      box-shadow: 0 0 0 3px var(--accent-glow);
    }
    textarea.form-control {
      resize: vertical;
      min-height: 100px;
    }
    .article-section {
      background: var(--bg-alt);
      border-top: 1px solid var(--border-color);
      border-bottom: 1px solid var(--border-color);
    }
    .article-container {
      background: #ffffff;
      border: 1px solid var(--card-border);
      border-radius: var(--radius-md);
      padding: 30px;
      box-shadow: var(--shadow-sm);
    }
    .article-links {
      display: flex;
      flex-wrap: wrap;
      gap: 12px;
      margin-top: 18px;
    }
    .article-btn {
      padding: 8px 16px;
      background: var(--bg-alt);
      border: 1px solid var(--border-color);
      border-radius: 6px;
      font-size: 0.88rem;
      color: var(--primary-hover);
      font-weight: 500;
    }
    .article-btn:hover {
      background: var(--primary-light);
      border-color: var(--primary-color);
    }
    .site-footer {
      background: #ffffff;
      border-top: 1px solid var(--border-color);
      padding: 60px 0 30px 0;
      color: var(--text-muted);
    }
    .footer-grid {
      display: grid;
      grid-template-columns: 2fr 1fr 1fr 1.5fr;
      gap: 40px;
      margin-bottom: 40px;
    }
    .footer-col h4 {
      font-size: 1.05rem;
      font-weight: 700;
      color: var(--text-main);
      margin-bottom: 16px;
    }
    .footer-col ul li {
      margin-bottom: 10px;
      font-size: 0.9rem;
    }
    .footer-col ul li a:hover {
      color: var(--primary-color);
    }
    .friend-links {
      display: flex;
      flex-wrap: wrap;
      gap: 10px;
    }
    .friend-links a {
      font-size: 0.88rem;
      color: var(--text-muted);
      background: var(--bg-alt);
      padding: 4px 10px;
      border-radius: 4px;
      border: 1px solid var(--border-color);
    }
    .friend-links a:hover {
      color: var(--primary-color);
      border-color: var(--primary-color);
      background: var(--primary-light);
    }
    .footer-bottom {
      border-top: 1px solid var(--border-color);
      padding-top: 24px;
      text-align: center;
      font-size: 0.88rem;
      color: var(--text-light);
    }
    .floating-tools {
      position: fixed;
      right: 20px;
      bottom: 30px;
      display: flex;
      flex-direction: column;
      gap: 10px;
      z-index: 999;
    }
    .float-btn {
      width: 46px;
      height: 46px;
      background: #ffffff;
      border: 1px solid var(--card-border);
      border-radius: 50%;
      display: flex;
      align-items: center;
      justify-content: center;
      box-shadow: var(--shadow-md);
      color: var(--primary-color);
      font-size: 1.1rem;
      cursor: pointer;
      transition: var(--transition);
    }
    .float-btn:hover {
      background: var(--primary-gradient);
      color: #ffffff;
      transform: scale(1.08);
    }
    @media (max-width: 992px) {
      .hero-title { font-size: 2.2rem; }
      .hero-metrics { grid-template-columns: repeat(2, 1fr); }
      .about-grid { grid-template-columns: 1fr; }
      .service-grid { grid-template-columns: repeat(2, 1fr); }
      .workflow-grid { grid-template-columns: repeat(2, 1fr); }
      .solution-grid { grid-template-columns: repeat(2, 1fr); }
      .review-grid { grid-template-columns: 1fr; }
      .agent-perks { grid-template-columns: repeat(2, 1fr); }
      .contact-grid { grid-template-columns: 1fr; }
      .footer-grid { grid-template-columns: 1fr 1fr; }
    }
    @media (max-width: 768px) {
      .mobile-menu-toggle { display: block; }
      .nav-links {
        display: none;
        position: absolute;
        top: 72px;
        left: 0;
        right: 0;
        background: #ffffff;
        flex-direction: column;
        padding: 16px 20px;
        box-shadow: var(--shadow-md);
        border-bottom: 1px solid var(--border-color);
      }
      .nav-links.active { display: flex; }
      .nav-link-item { width: 100%; padding: 10px 0; }
      .header-actions { display: none; }
      .hero-title { font-size: 1.85rem; }
      .service-grid, .solution-grid, .gallery-grid { grid-template-columns: 1fr; }
      .agent-perks { grid-template-columns: 1fr; }
      .footer-grid { grid-template-columns: 1fr; }
    }