:root {
      --primary: #6c2bd9;
      --primary-light: #8b5cf6;
      --primary-dark: #4c1d95;
      --accent: #d946ef;
      --accent-glow: #ec4899;
      --bg-base: #f8f6fc;
      --bg-card: #ffffff;
      --text-main: #1e152a;
      --text-muted: #5e536c;
      --border-color: #e4ddf0;
      --container-width: 1200px;
    }
    * { box-sizing: border-box; margin: 0; padding: 0; }
    body {
      font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
      background-color: var(--bg-base);
      color: var(--text-main);
      line-height: 1.6;
      overflow-x: hidden;
    }
    a { text-decoration: none; color: inherit; transition: all 0.25s ease; }
    .site-container {
      width: 100%;
      max-width: var(--container-width);
      margin: 0 auto;
      padding: 0 20px;
    }
    .main-header {
      position: sticky;
      top: 0;
      z-index: 1000;
      background: rgba(255, 255, 255, 0.95);
      backdrop-filter: blur(10px);
      border-bottom: 1px solid var(--border-color);
    }
    .nav-wrap {
      display: flex;
      align-items: center;
      justify-content: space-between;
      height: 72px;
    }
    .nav-brand {
      display: flex;
      align-items: center;
      gap: 12px;
    }
    .nav-brand .ai-page-logo {
      height: 40px;
      width: auto;
      object-fit: contain;
    }
    .nav-brand-text {
      font-size: 20px;
      font-weight: 700;
      color: var(--primary-dark);
      letter-spacing: -0.5px;
    }
    .nav-links {
      display: flex;
      align-items: center;
      list-style: none;
      gap: 0;
    }
    .nav-links li a {
      font-size: 14px;
      font-weight: 500;
      color: var(--text-main);
      padding: 8px 12px;
      border-radius: 6px;
    }
    .nav-links li a:hover {
      color: var(--primary);
      background: #f1ebfa;
    }
    .nav-cta {
      display: flex;
      align-items: center;
      gap: 12px;
    }
    .btn-outline {
      border: 1px solid var(--primary);
      color: var(--primary);
      padding: 8px 18px;
      border-radius: 20px;
      font-size: 14px;
      font-weight: 600;
      display: inline-flex;
      align-items: center;
      justify-content: center;
    }
    .btn-outline:hover {
      background: var(--primary);
      color: #fff;
    }
    .btn-primary {
      background: linear-gradient(135deg, var(--primary), var(--accent));
      color: #ffffff;
      padding: 9px 22px;
      border-radius: 20px;
      font-size: 14px;
      font-weight: 600;
      box-shadow: 0 4px 14px rgba(108, 43, 217, 0.28);
      display: inline-flex;
      align-items: center;
      justify-content: center;
      border: none;
      cursor: pointer;
    }
    .btn-primary:hover {
      opacity: 0.95;
      transform: translateY(-1px);
      box-shadow: 0 6px 20px rgba(108, 43, 217, 0.35);
    }
    .menu-toggle {
      display: none;
      background: none;
      border: none;
      cursor: pointer;
      padding: 6px;
    }
    .menu-toggle span {
      display: block;
      width: 24px;
      height: 2px;
      background: var(--text-main);
      margin: 5px 0;
    }
    .hero-section {
      background: radial-gradient(circle at 50% 20%, #f3ebfc 0%, var(--bg-base) 70%);
      padding: 80px 0 60px;
      text-align: center;
      border-bottom: 1px solid var(--border-color);
      position: relative;
    }
    .hero-badge {
      display: inline-flex;
      align-items: center;
      padding: 6px 16px;
      background: #eee5fb;
      border: 1px solid #d8c3f7;
      border-radius: 30px;
      font-size: 13px;
      color: var(--primary-dark);
      font-weight: 600;
      margin-bottom: 24px;
    }
    .hero-title {
      font-size: 42px;
      font-weight: 800;
      color: var(--text-main);
      line-height: 1.25;
      margin-bottom: 20px;
      letter-spacing: -0.5px;
    }
    .hero-title span {
      background: linear-gradient(135deg, var(--primary), var(--accent));
      -webkit-background-clip: text;
      color: transparent;
      display: inline-block;
    }
    .hero-desc {
      font-size: 18px;
      color: var(--text-muted);
      max-width: 820px;
      margin: 0 auto 36px;
      line-height: 1.65;
    }
    .hero-actions {
      display: flex;
      justify-content: center;
      align-items: center;
      gap: 16px;
      flex-wrap: wrap;
      margin-bottom: 50px;
    }
    .btn-hero-main {
      padding: 14px 34px;
      font-size: 16px;
      border-radius: 28px;
      font-weight: 700;
      background: linear-gradient(135deg, var(--primary), var(--accent));
      color: #fff;
      box-shadow: 0 6px 22px rgba(108, 43, 217, 0.35);
    }
    .btn-hero-sub {
      padding: 14px 28px;
      font-size: 16px;
      border-radius: 28px;
      font-weight: 600;
      border: 1px solid var(--border-color);
      background: #fff;
      color: var(--text-main);
    }
    .btn-hero-sub:hover {
      border-color: var(--primary);
      color: var(--primary);
    }
    .hero-stats-grid {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 20px;
      max-width: 960px;
      margin: 0 auto;
    }
    .stat-card {
      background: #ffffff;
      border: 1px solid var(--border-color);
      border-radius: 14px;
      padding: 20px;
      text-align: center;
      box-shadow: 0 4px 12px rgba(108, 43, 217, 0.04);
      transition: transform 0.25s ease;
    }
    .stat-card:hover {
      transform: translateY(-4px);
    }
    .stat-num {
      font-size: 28px;
      font-weight: 800;
      color: var(--primary);
      margin-bottom: 4px;
    }
    .stat-label {
      font-size: 13px;
      color: var(--text-muted);
    }
    .section-wrap {
      padding: 80px 0;
      border-bottom: 1px solid var(--border-color);
    }
    .section-head {
      text-align: center;
      max-width: 760px;
      margin: 0 auto 50px;
    }
    .section-tag {
      font-size: 13px;
      font-weight: 700;
      text-transform: uppercase;
      color: var(--primary);
      letter-spacing: 1px;
      margin-bottom: 8px;
      display: block;
    }
    .section-title {
      font-size: 32px;
      font-weight: 800;
      color: var(--text-main);
      margin-bottom: 14px;
    }
    .section-subtitle {
      font-size: 16px;
      color: var(--text-muted);
    }
    .grid-3 {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 24px;
    }
    .grid-4 {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 20px;
    }
    .grid-2 {
      display: grid;
      grid-template-columns: repeat(2, 1fr);
      gap: 30px;
    }
    .feature-card {
      background: var(--bg-card);
      border: 1px solid var(--border-color);
      border-radius: 14px;
      padding: 28px;
      position: relative;
      transition: all 0.25s ease;
    }
    .feature-card:hover {
      transform: translateY(-4px);
      box-shadow: 0 10px 24px rgba(108, 43, 217, 0.08);
      border-color: #d1bbf4;
    }
    .card-badge {
      display: inline-block;
      font-size: 12px;
      font-weight: 600;
      padding: 4px 10px;
      border-radius: 6px;
      background: #f1ebfa;
      color: var(--primary);
      margin-bottom: 14px;
    }
    .feature-card h3 {
      font-size: 19px;
      font-weight: 700;
      margin-bottom: 10px;
      color: var(--text-main);
    }
    .feature-card p {
      font-size: 14px;
      color: var(--text-muted);
      line-height: 1.6;
    }
    .model-tags-container {
      background: #ffffff;
      border: 1px solid var(--border-color);
      border-radius: 14px;
      padding: 30px;
      margin-top: 30px;
    }
    .model-tags-title {
      font-size: 16px;
      font-weight: 700;
      color: var(--text-main);
      margin-bottom: 16px;
      text-align: center;
    }
    .model-tags-list {
      display: flex;
      flex-wrap: wrap;
      gap: 10px;
      justify-content: center;
    }
    .model-tag-item {
      font-size: 13px;
      padding: 6px 14px;
      border-radius: 20px;
      background: #f3effa;
      color: var(--primary-dark);
      border: 1px solid #e1d4f3;
      font-weight: 500;
    }
    .media-card {
      background: #fff;
      border: 1px solid var(--border-color);
      border-radius: 14px;
      overflow: hidden;
      display: flex;
      flex-direction: column;
    }
    .media-thumb {
      width: 100%;
      background: #ece7f4;
      overflow: hidden;
      display: flex;
      align-items: center;
      justify-content: center;
    }
    .media-thumb img {
      width: 100%;
      height: auto;
      display: block;
      object-fit: cover;
    }
    .media-body {
      padding: 22px;
      flex-grow: 1;
    }
    .media-body h4 {
      font-size: 17px;
      font-weight: 700;
      margin-bottom: 8px;
    }
    .media-body p {
      font-size: 13px;
      color: var(--text-muted);
    }
    .table-responsive {
      width: 100%;
      overflow-x: auto;
      background: #ffffff;
      border-radius: 14px;
      border: 1px solid var(--border-color);
      box-shadow: 0 4px 16px rgba(108, 43, 217, 0.04);
    }
    .eval-table {
      width: 100%;
      border-collapse: collapse;
      text-align: left;
    }
    .eval-table th, .eval-table td {
      padding: 16px 20px;
      font-size: 14px;
      border-bottom: 1px solid #f0eaf7;
    }
    .eval-table th {
      background: #f7f3fd;
      color: var(--text-main);
      font-weight: 700;
      white-space: nowrap;
    }
    .eval-table tr:last-child td {
      border-bottom: none;
    }
    .eval-table .highlight-col {
      background: #faf6fe;
      font-weight: 600;
      color: var(--primary-dark);
    }
    .eval-badge {
      display: inline-block;
      padding: 3px 8px;
      background: #dcfce7;
      color: #15803d;
      border-radius: 4px;
      font-size: 12px;
      font-weight: 600;
    }
    .rating-banner {
      background: linear-gradient(135deg, #4c1d95, #7c3aed);
      color: #ffffff;
      border-radius: 14px;
      padding: 24px 30px;
      display: flex;
      align-items: center;
      justify-content: space-between;
      margin-bottom: 30px;
      flex-wrap: wrap;
      gap: 16px;
    }
    .rating-score {
      font-size: 40px;
      font-weight: 900;
      color: #fde047;
      line-height: 1;
    }
    .rating-meta {
      font-size: 14px;
      opacity: 0.9;
    }
    .timeline-steps {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 20px;
      position: relative;
    }
    .step-item {
      background: #ffffff;
      border: 1px solid var(--border-color);
      border-radius: 12px;
      padding: 22px;
      position: relative;
    }
    .step-idx {
      width: 34px;
      height: 34px;
      border-radius: 50%;
      background: var(--primary);
      color: #fff;
      display: flex;
      align-items: center;
      justify-content: center;
      font-weight: 700;
      font-size: 15px;
      margin-bottom: 14px;
    }
    .step-item h4 {
      font-size: 16px;
      font-weight: 700;
      margin-bottom: 8px;
    }
    .step-item p {
      font-size: 13px;
      color: var(--text-muted);
    }
    .faq-list {
      max-width: 900px;
      margin: 0 auto;
      display: flex;
      flex-direction: column;
      gap: 14px;
    }
    .faq-item {
      background: #ffffff;
      border: 1px solid var(--border-color);
      border-radius: 10px;
      overflow: hidden;
    }
    .faq-question {
      padding: 18px 22px;
      font-weight: 600;
      font-size: 16px;
      cursor: pointer;
      display: flex;
      align-items: center;
      justify-content: space-between;
      color: var(--text-main);
      user-select: none;
    }
    .faq-question:hover {
      background: #faf7fd;
    }
    .faq-icon {
      font-size: 18px;
      color: var(--primary);
      transition: transform 0.25s ease;
    }
    .faq-answer {
      max-height: 0;
      overflow: hidden;
      transition: max-height 0.3s ease, padding 0.3s ease;
      background: #faf8fe;
      color: var(--text-muted);
      font-size: 14px;
      line-height: 1.65;
      padding: 0 22px;
    }
    .faq-item.active .faq-answer {
      max-height: 300px;
      padding: 16px 22px;
      border-top: 1px solid #eee7f6;
    }
    .faq-item.active .faq-icon {
      transform: rotate(45deg);
    }
    .testimonial-card {
      background: #ffffff;
      border: 1px solid var(--border-color);
      border-radius: 14px;
      padding: 24px;
      display: flex;
      flex-direction: column;
      justify-content: space-between;
    }
    .testimonial-content {
      font-size: 14px;
      color: var(--text-muted);
      margin-bottom: 18px;
      position: relative;
      line-height: 1.6;
    }
    .testimonial-user {
      display: flex;
      align-items: center;
      gap: 12px;
      border-top: 1px solid #f0eaf7;
      padding-top: 14px;
    }
    .user-avatar {
      width: 42px;
      height: 42px;
      border-radius: 50%;
      background: linear-gradient(135deg, var(--primary-light), var(--accent));
      color: #ffffff;
      display: flex;
      align-items: center;
      justify-content: center;
      font-weight: 700;
      font-size: 16px;
    }
    .user-info h5 {
      font-size: 15px;
      font-weight: 700;
      color: var(--text-main);
    }
    .user-info p {
      font-size: 12px;
      color: var(--text-muted);
    }
    .form-wrapper {
      background: #ffffff;
      border: 1px solid var(--border-color);
      border-radius: 16px;
      padding: 36px;
      box-shadow: 0 8px 24px rgba(108, 43, 217, 0.05);
    }
    .form-group {
      margin-bottom: 18px;
    }
    .form-group label {
      display: block;
      font-size: 14px;
      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: 8px;
      font-size: 14px;
      background: #fdfcff;
      color: var(--text-main);
      font-family: inherit;
    }
    .form-control:focus {
      outline: none;
      border-color: var(--primary);
      box-shadow: 0 0 0 3px rgba(108, 43, 217, 0.12);
    }
    .contact-info-panel {
      background: linear-gradient(135deg, #5b21b6, #7c3aed);
      color: #fff;
      border-radius: 16px;
      padding: 36px;
      display: flex;
      flex-direction: column;
      justify-content: space-between;
    }
    .contact-qr-wrap {
      background: #ffffff;
      padding: 12px;
      border-radius: 12px;
      width: 150px;
      margin-top: 14px;
    }
    .contact-qr-wrap img {
      width: 100%;
      height: auto;
      display: block;
    }
    .articles-grid {
      display: grid;
      grid-template-columns: repeat(5, 1fr);
      gap: 16px;
    }
    .article-item {
      background: #ffffff;
      border: 1px solid var(--border-color);
      border-radius: 10px;
      padding: 18px;
      display: flex;
      flex-direction: column;
      justify-content: space-between;
    }
    .article-item h4 {
      font-size: 15px;
      font-weight: 600;
      margin-bottom: 10px;
      line-height: 1.45;
    }
    .article-item a {
      font-size: 13px;
      color: var(--primary);
      font-weight: 600;
      display: inline-flex;
      align-items: center;
      gap: 4px;
    }
    .article-item a:hover {
      text-decoration: underline;
    }
    .site-footer {
      background: #191224;
      color: #beb6cc;
      padding: 60px 0 30px;
      border-top: 1px solid #2e2342;
    }
    .footer-top {
      display: grid;
      grid-template-columns: 2fr 1fr 1fr 1.5fr;
      gap: 36px;
      margin-bottom: 40px;
    }
    .footer-brand h3 {
      color: #ffffff;
      font-size: 20px;
      margin-bottom: 12px;
    }
    .footer-brand p {
      font-size: 13px;
      line-height: 1.65;
      color: #a79cb8;
    }
    .footer-col h4 {
      color: #ffffff;
      font-size: 15px;
      margin-bottom: 14px;
      font-weight: 600;
    }
    .footer-links-list {
      list-style: none;
      display: flex;
      flex-direction: column;
      gap: 8px;
    }
    .footer-links-list li a {
      color: #a79cb8;
      font-size: 13px;
    }
    .footer-links-list li a:hover {
      color: #ffffff;
    }
    .footer-bottom {
      border-top: 1px solid #2e2342;
      padding-top: 24px;
      display: flex;
      justify-content: space-between;
      align-items: center;
      flex-wrap: wrap;
      gap: 14px;
      font-size: 12px;
    }
    .footer-flinks {
      display: flex;
      flex-wrap: wrap;
      gap: 12px;
    }
    .footer-flinks a {
      color: #8f82a4;
    }
    .footer-flinks a:hover {
      color: #ffffff;
    }
    .floating-tools {
      position: fixed;
      right: 20px;
      bottom: 24px;
      z-index: 999;
      display: flex;
      flex-direction: column;
      gap: 10px;
    }
    .float-btn {
      width: 46px;
      height: 46px;
      border-radius: 50%;
      background: #ffffff;
      color: var(--primary);
      box-shadow: 0 4px 16px rgba(0,0,0,0.15);
      border: 1px solid var(--border-color);
      display: flex;
      align-items: center;
      justify-content: center;
      cursor: pointer;
      font-size: 14px;
      font-weight: 700;
      transition: all 0.2s ease;
    }
    .float-btn:hover {
      background: var(--primary);
      color: #ffffff;
      transform: scale(1.05);
    }
    @media (max-width: 992px) {
      .grid-4, .timeline-steps, .articles-grid {
        grid-template-columns: repeat(2, 1fr);
      }
      .grid-3 {
        grid-template-columns: repeat(2, 1fr);
      }
      .grid-2 {
        grid-template-columns: 1fr;
      }
      .hero-stats-grid {
        grid-template-columns: repeat(2, 1fr);
      }
      .footer-top {
        grid-template-columns: 1fr 1fr;
      }
    }
    @media (max-width: 768px) {
      .menu-toggle {
        display: block;
      }
      .nav-links {
        display: none;
        flex-direction: column;
        position: absolute;
        top: 72px;
        left: 0;
        width: 100%;
        background: #ffffff;
        border-bottom: 1px solid var(--border-color);
        padding: 16px 20px;
      }
      .nav-links.show {
        display: flex;
      }
      .nav-links li a {
        width: 100%;
        padding: 10px 0;
      }
      .nav-cta {
        display: none;
      }
      .hero-title {
        font-size: 30px;
      }
      .hero-desc {
        font-size: 15px;
      }
      .grid-3, .grid-4, .timeline-steps, .articles-grid, .hero-stats-grid {
        grid-template-columns: 1fr;
      }
      .footer-top {
        grid-template-columns: 1fr;
      }
      .form-wrapper {
        padding: 22px;
      }
    }