:root {
      --primary: #4f46e5;
      --primary-gradient: linear-gradient(135deg, #4f46e5 0%, #06b6d4 50%, #ec4899 100%);
      --accent-gradient: linear-gradient(135deg, #ffedd5 0%, #fef08a 50%, #bbf7d0 100%);
      --text-main: #0f172a;
      --text-muted: #475569;
      --text-light: #64748b;
      --bg-main: #f8fafc;
      --bg-card: #ffffff;
      --border-color: #e2e8f0;
      --radius-sm: 8px;
      --radius-md: 16px;
      --radius-lg: 24px;
      --shadow-sm: 0 2px 8px rgba(15, 23, 42, 0.04);
      --shadow-md: 0 10px 25px -5px rgba(15, 23, 42, 0.08);
      --shadow-lg: 0 20px 35px -10px rgba(79, 70, 229, 0.15);
      --container-width: 1200px;
    }

    * {
      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, sans-serif;
      background-color: var(--bg-main);
      background-image: 
        radial-gradient(circle at 10% 20%, rgba(79, 70, 229, 0.04) 0%, transparent 40%),
        radial-gradient(circle at 90% 80%, rgba(236, 72, 153, 0.04) 0%, transparent 40%);
      background-attachment: fixed;
      color: var(--text-main);
      line-height: 1.6;
      -webkit-font-smoothing: antialiased;
    }

    a {
      color: inherit;
      text-decoration: none;
      transition: all 0.25s ease;
    }

    .container {
      max-width: var(--container-width);
      margin: 0 auto;
      padding: 0 24px;
      width: 100%;
    }

    .site-header {
      position: sticky;
      top: 0;
      z-index: 1000;
      background: rgba(255, 255, 255, 0.88);
      backdrop-filter: blur(12px);
      -webkit-backdrop-filter: blur(12px);
      border-bottom: 1px solid var(--border-color);
    }

    .header-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-width: 140px;
      display: flex;
      align-items: center;
    }

    .ai-page-home-link {
      font-weight: 600;
      font-size: 0.95rem;
      color: var(--text-main);
      padding: 6px 12px;
      border-radius: var(--radius-sm);
    }

    .ai-page-home-link:hover {
      color: var(--primary);
      background: rgba(79, 70, 229, 0.06);
    }

    .nav-links {
      display: flex;
      align-items: center;
      gap: 0;
      list-style: none;
    }

    .nav-links a {
      font-size: 0.92rem;
      font-weight: 500;
      color: var(--text-muted);
      padding: 8px 14px;
      border-radius: var(--radius-sm);
    }

    .nav-links a:hover {
      color: var(--primary);
      background: rgba(79, 70, 229, 0.05);
    }

    .header-action {
      display: flex;
      align-items: center;
      gap: 12px;
    }

    .btn {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      padding: 10px 22px;
      border-radius: 9999px;
      font-size: 0.95rem;
      font-weight: 600;
      cursor: pointer;
      border: 1px solid transparent;
      transition: all 0.3s cubic-bezier(0.16, 1, 0.3, 1);
      text-align: center;
    }

    .btn-gradient {
      background: var(--primary-gradient);
      color: #ffffff !important;
      box-shadow: 0 4px 15px rgba(79, 70, 229, 0.3);
    }

    .btn-gradient:hover {
      transform: translateY(-2px);
      box-shadow: 0 8px 22px rgba(79, 70, 229, 0.4);
    }

    .btn-outline {
      background: #ffffff;
      color: var(--text-main) !important;
      border-color: var(--border-color);
      box-shadow: var(--shadow-sm);
    }

    .btn-outline:hover {
      border-color: var(--primary);
      color: var(--primary) !important;
      transform: translateY(-2px);
    }

    .btn-sm {
      padding: 6px 16px;
      font-size: 0.88rem;
    }

    .menu-toggle {
      display: none;
      background: none;
      border: none;
      font-size: 1.5rem;
      cursor: pointer;
      color: var(--text-main);
      padding: 4px;
    }

    .section-wrap {
      padding: 80px 0;
      position: relative;
    }

    .section-header {
      text-align: center;
      max-width: 760px;
      margin: 0 auto 50px;
    }

    .badge {
      display: inline-block;
      padding: 6px 16px;
      background: rgba(79, 70, 229, 0.1);
      color: var(--primary);
      border-radius: 9999px;
      font-size: 0.85rem;
      font-weight: 600;
      margin-bottom: 16px;
      letter-spacing: 0.5px;
    }

    .section-title {
      font-size: 2.2rem;
      font-weight: 800;
      color: var(--text-main);
      margin-bottom: 16px;
      line-height: 1.3;
    }

    .section-desc {
      font-size: 1.05rem;
      color: var(--text-muted);
    }

    .hero-section {
      padding: 90px 0 70px;
      text-align: center;
      position: relative;
    }

    .hero-container {
      max-width: 900px;
      margin: 0 auto;
    }

    .hero-h1 {
      font-size: 3rem;
      font-weight: 900;
      line-height: 1.25;
      color: var(--text-main);
      margin-bottom: 24px;
      letter-spacing: -0.5px;
    }

    .hero-h1 span {
      background: var(--primary-gradient);
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
    }

    .hero-lead {
      font-size: 1.2rem;
      color: var(--text-muted);
      line-height: 1.8;
      margin-bottom: 36px;
      max-width: 800px;
      margin-left: auto;
      margin-right: auto;
    }

    .hero-btns {
      display: flex;
      justify-content: center;
      gap: 16px;
      margin-bottom: 48px;
      flex-wrap: wrap;
    }

    .hero-btns .btn {
      padding: 14px 34px;
      font-size: 1.05rem;
    }

    .stats-card-grid {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 20px;
      margin-top: 40px;
    }

    .stat-card {
      background: var(--bg-card);
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      padding: 24px 20px;
      text-align: center;
      box-shadow: var(--shadow-sm);
      transition: transform 0.3s ease, box-shadow 0.3s ease;
    }

    .stat-card:hover {
      transform: translateY(-4px);
      box-shadow: var(--shadow-md);
    }

    .stat-card .num {
      font-size: 2.2rem;
      font-weight: 800;
      color: var(--primary);
      margin-bottom: 4px;
      font-family: inherit;
    }

    .stat-card .label {
      font-size: 0.9rem;
      color: var(--text-muted);
      font-weight: 500;
    }

    .models-marquee {
      margin-top: 50px;
      padding: 20px;
      background: #ffffff;
      border-radius: var(--radius-md);
      border: 1px solid var(--border-color);
      box-shadow: var(--shadow-sm);
    }

    .models-marquee-title {
      font-size: 0.9rem;
      font-weight: 600;
      color: var(--text-light);
      margin-bottom: 14px;
      text-align: center;
      text-transform: uppercase;
      letter-spacing: 1px;
    }

    .model-tags {
      display: flex;
      flex-wrap: wrap;
      justify-content: center;
      gap: 10px;
    }

    .model-tag {
      font-size: 0.85rem;
      padding: 6px 14px;
      background: var(--bg-main);
      color: var(--text-main);
      border-radius: 9999px;
      border: 1px solid var(--border-color);
      font-weight: 500;
      transition: all 0.2s ease;
    }

    .model-tag:hover {
      border-color: var(--primary);
      color: var(--primary);
      background: rgba(79, 70, 229, 0.05);
    }

    .card-grid-3 {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 24px;
    }

    .card-grid-4 {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 20px;
    }

    .feature-card {
      background: var(--bg-card);
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      padding: 30px;
      box-shadow: var(--shadow-sm);
      transition: all 0.3s ease;
      display: flex;
      flex-direction: column;
    }

    .feature-card:hover {
      transform: translateY(-6px);
      box-shadow: var(--shadow-lg);
      border-color: rgba(79, 70, 229, 0.3);
    }

    .feature-icon {
      width: 54px;
      height: 54px;
      border-radius: 14px;
      background: var(--primary-gradient);
      display: flex;
      align-items: center;
      justify-content: center;
      color: #ffffff;
      font-size: 1.4rem;
      margin-bottom: 20px;
      font-weight: bold;
    }

    .feature-title {
      font-size: 1.25rem;
      font-weight: 700;
      color: var(--text-main);
      margin-bottom: 12px;
    }

    .feature-desc {
      font-size: 0.95rem;
      color: var(--text-muted);
      line-height: 1.65;
    }

    .workstation-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 24px;
    }

    .ws-item {
      background: var(--bg-card);
      border-radius: var(--radius-md);
      padding: 26px;
      border: 1px solid var(--border-color);
      box-shadow: var(--shadow-sm);
      transition: all 0.3s ease;
    }

    .ws-item:hover {
      transform: translateY(-4px);
      box-shadow: var(--shadow-md);
      border-color: #06b6d4;
    }

    .ws-title {
      font-size: 1.15rem;
      font-weight: 700;
      color: var(--text-main);
      margin-bottom: 10px;
      display: flex;
      align-items: center;
      gap: 8px;
    }

    .ws-title::before {
      content: "";
      display: inline-block;
      width: 8px;
      height: 8px;
      border-radius: 50%;
      background: var(--primary);
    }

    .ws-desc {
      font-size: 0.92rem;
      color: var(--text-muted);
      line-height: 1.6;
    }

    .timeline-wrap {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 20px;
      position: relative;
    }

    .timeline-card {
      background: var(--bg-card);
      border-radius: var(--radius-md);
      padding: 28px 20px;
      border: 1px solid var(--border-color);
      box-shadow: var(--shadow-sm);
      position: relative;
      text-align: center;
    }

    .step-badge {
      width: 44px;
      height: 44px;
      border-radius: 50%;
      background: var(--primary-gradient);
      color: #ffffff;
      font-weight: 800;
      display: flex;
      align-items: center;
      justify-content: center;
      margin: 0 auto 16px;
      font-size: 1.1rem;
      box-shadow: 0 4px 10px rgba(79, 70, 229, 0.2);
    }

    .step-name {
      font-size: 1.15rem;
      font-weight: 700;
      margin-bottom: 10px;
      color: var(--text-main);
    }

    .step-text {
      font-size: 0.9rem;
      color: var(--text-muted);
      line-height: 1.5;
    }

    .showcase-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 24px;
    }

    .media-card {
      background: var(--bg-card);
      border-radius: var(--radius-md);
      overflow: hidden;
      border: 1px solid var(--border-color);
      box-shadow: var(--shadow-sm);
      transition: all 0.3s ease;
    }

    .media-card:hover {
      transform: translateY(-4px);
      box-shadow: var(--shadow-md);
    }

    .media-thumb {
      width: 100%;
      height: 220px;
      overflow: hidden;
      background: #e2e8f0;
    }

    .media-thumb img {
      width: 100%;
      height: 100%;
      object-fit: cover;
      transition: transform 0.4s ease;
    }

    .media-card:hover .media-thumb img {
      transform: scale(1.04);
    }

    .media-body {
      padding: 20px;
    }

    .media-title {
      font-size: 1.1rem;
      font-weight: 700;
      color: var(--text-main);
      margin-bottom: 8px;
    }

    .media-text {
      font-size: 0.9rem;
      color: var(--text-muted);
      line-height: 1.5;
    }

    .rating-banner {
      background: linear-gradient(135deg, #1e1b4b 0%, #312e81 100%);
      color: #ffffff;
      border-radius: var(--radius-lg);
      padding: 36px 40px;
      margin-bottom: 36px;
      display: flex;
      align-items: center;
      justify-content: space-between;
      flex-wrap: wrap;
      gap: 24px;
      box-shadow: var(--shadow-lg);
    }

    .rating-info h3 {
      font-size: 1.6rem;
      font-weight: 800;
      margin-bottom: 8px;
    }

    .rating-info p {
      color: #cbd5e1;
      font-size: 1rem;
    }

    .rating-scores {
      display: flex;
      align-items: center;
      gap: 30px;
    }

    .score-block {
      text-align: right;
    }

    .score-block .val {
      font-size: 3rem;
      font-weight: 900;
      color: #38bdf8;
      line-height: 1;
    }

    .score-block .stars {
      color: #fbbf24;
      font-size: 1.2rem;
      letter-spacing: 2px;
      margin-top: 4px;
    }

    .table-container {
      background: var(--bg-card);
      border-radius: var(--radius-md);
      border: 1px solid var(--border-color);
      overflow-x: auto;
      box-shadow: var(--shadow-sm);
    }

    .custom-table {
      width: 100%;
      border-collapse: collapse;
      text-align: left;
      min-width: 600px;
    }

    .custom-table th, .custom-table td {
      padding: 16px 20px;
      border-bottom: 1px solid var(--border-color);
      font-size: 0.95rem;
    }

    .custom-table th {
      background: #f1f5f9;
      color: var(--text-main);
      font-weight: 700;
    }

    .custom-table tr:last-child td {
      border-bottom: none;
    }

    .custom-table tr:hover td {
      background: rgba(79, 70, 229, 0.02);
    }

    .tag-highlight {
      display: inline-block;
      padding: 3px 10px;
      border-radius: 6px;
      font-size: 0.85rem;
      font-weight: 600;
      background: rgba(16, 185, 129, 0.12);
      color: #059669;
    }

    .tag-dim {
      display: inline-block;
      padding: 3px 10px;
      border-radius: 6px;
      font-size: 0.85rem;
      background: rgba(100, 116, 139, 0.1);
      color: var(--text-muted);
    }

    .feedback-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 24px;
    }

    .feedback-card {
      background: var(--bg-card);
      border-radius: var(--radius-md);
      padding: 26px;
      border: 1px solid var(--border-color);
      box-shadow: var(--shadow-sm);
      display: flex;
      flex-direction: column;
      justify-content: space-between;
    }

    .feedback-body {
      font-size: 0.95rem;
      color: var(--text-main);
      line-height: 1.6;
      margin-bottom: 20px;
      position: relative;
    }

    .feedback-body::before {
      content: "“";
      font-size: 2.4rem;
      line-height: 0;
      display: inline-block;
      vertical-align: -10px;
      color: var(--primary);
      margin-right: 4px;
    }

    .feedback-user {
      display: flex;
      align-items: center;
      gap: 12px;
      border-top: 1px solid #f1f5f9;
      padding-top: 14px;
    }

    .user-avatar {
      width: 42px;
      height: 42px;
      border-radius: 50%;
      background: var(--accent-gradient);
      color: #0f172a;
      display: flex;
      align-items: center;
      justify-content: center;
      font-weight: 700;
      font-size: 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-list {
      max-width: 860px;
      margin: 0 auto;
      display: flex;
      flex-direction: column;
      gap: 16px;
    }

    .faq-item {
      background: var(--bg-card);
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      overflow: hidden;
      box-shadow: var(--shadow-sm);
      transition: all 0.2s ease;
    }

    .faq-question {
      padding: 20px 24px;
      font-size: 1.05rem;
      font-weight: 600;
      color: var(--text-main);
      cursor: pointer;
      display: flex;
      justify-content: space-between;
      align-items: center;
      user-select: none;
    }

    .faq-question:hover {
      color: var(--primary);
    }

    .faq-icon {
      font-size: 1.2rem;
      transition: transform 0.3s ease;
      color: var(--text-light);
    }

    .faq-answer {
      max-height: 0;
      overflow: hidden;
      transition: max-height 0.3s cubic-bezier(0, 1, 0, 1);
      padding: 0 24px;
      color: var(--text-muted);
      font-size: 0.95rem;
      line-height: 1.7;
    }

    .faq-item.active {
      border-color: rgba(79, 70, 229, 0.3);
      box-shadow: var(--shadow-md);
    }

    .faq-item.active .faq-answer {
      max-height: 300px;
      padding-bottom: 20px;
    }

    .faq-item.active .faq-icon {
      transform: rotate(45deg);
      color: var(--primary);
    }

    .contact-layout {
      display: grid;
      grid-template-columns: 1fr 1.2fr;
      gap: 36px;
      background: var(--bg-card);
      border-radius: var(--radius-lg);
      border: 1px solid var(--border-color);
      padding: 40px;
      box-shadow: var(--shadow-md);
    }

    .contact-info-panel {
      display: flex;
      flex-direction: column;
      gap: 24px;
    }

    .contact-info-title {
      font-size: 1.5rem;
      font-weight: 800;
      color: var(--text-main);
    }

    .contact-info-list {
      display: flex;
      flex-direction: column;
      gap: 16px;
    }

    .contact-info-row {
      display: flex;
      align-items: center;
      gap: 12px;
      font-size: 0.95rem;
      color: var(--text-muted);
    }

    .contact-info-row strong {
      color: var(--text-main);
      min-width: 80px;
    }

    .qr-box {
      margin-top: 10px;
      padding: 16px;
      background: var(--bg-main);
      border-radius: var(--radius-md);
      display: inline-flex;
      flex-direction: column;
      align-items: center;
      gap: 8px;
      border: 1px dashed var(--border-color);
      max-width: 170px;
    }

    .qr-box img {
      width: 130px;
      height: 130px;
      object-fit: cover;
      border-radius: var(--radius-sm);
    }

    .qr-box span {
      font-size: 0.85rem;
      color: var(--text-muted);
      font-weight: 500;
    }

    .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 16px;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-sm);
      font-size: 0.95rem;
      font-family: inherit;
      color: var(--text-main);
      background: #ffffff;
      outline: none;
      transition: border-color 0.2s ease, box-shadow 0.2s ease;
    }

    .form-control:focus {
      border-color: var(--primary);
      box-shadow: 0 0 0 3px rgba(79, 70, 229, 0.15);
    }

    textarea.form-control {
      resize: vertical;
      min-height: 100px;
    }

    .news-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 24px;
    }

    .news-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;
      transition: all 0.3s ease;
    }

    .news-card:hover {
      transform: translateY(-4px);
      box-shadow: var(--shadow-md);
      border-color: var(--primary);
    }

    .news-title {
      font-size: 1.1rem;
      font-weight: 700;
      color: var(--text-main);
      margin-bottom: 10px;
      line-height: 1.4;
    }

    .news-meta {
      display: flex;
      justify-content: space-between;
      align-items: center;
      font-size: 0.85rem;
      color: var(--text-light);
      margin-top: 14px;
      padding-top: 12px;
      border-top: 1px solid #f1f5f9;
    }

    .site-footer {
      background: #0f172a;
      color: #94a3b8;
      padding: 60px 0 30px;
      font-size: 0.9rem;
      border-top: 1px solid #1e293b;
    }

    .footer-grid {
      display: grid;
      grid-template-columns: 2fr 1fr 1fr 1.5fr;
      gap: 40px;
      margin-bottom: 40px;
    }

    .footer-col h4 {
      color: #ffffff;
      font-size: 1.05rem;
      font-weight: 700;
      margin-bottom: 18px;
    }

    .footer-col p {
      line-height: 1.7;
      margin-bottom: 14px;
    }

    .footer-links {
      list-style: none;
      display: flex;
      flex-direction: column;
      gap: 10px;
    }

    .footer-links a {
      color: #94a3b8;
    }

    .footer-links a:hover {
      color: #38bdf8;
    }

    .friend-links-box {
      padding: 20px;
      background: #1e293b;
      border-radius: var(--radius-sm);
      margin-bottom: 30px;
    }

    .friend-links-title {
      color: #e2e8f0;
      font-weight: 600;
      margin-bottom: 10px;
      font-size: 0.9rem;
    }

    .friend-links-list {
      display: flex;
      flex-wrap: wrap;
      gap: 16px;
    }

    .friend-links-list a {
      color: #94a3b8;
      font-size: 0.85rem;
    }

    .friend-links-list a:hover {
      color: #38bdf8;
      text-decoration: underline;
    }

    .footer-bottom {
      border-top: 1px solid #1e293b;
      padding-top: 24px;
      text-align: center;
      font-size: 0.85rem;
      color: #64748b;
    }

    .float-service {
      position: fixed;
      right: 20px;
      bottom: 40px;
      z-index: 999;
      display: flex;
      flex-direction: column;
      gap: 12px;
    }

    .float-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 15px rgba(0,0,0,0.2);
      cursor: pointer;
      border: none;
      font-size: 1.2rem;
      transition: all 0.3s ease;
    }

    .float-btn:hover {
      transform: scale(1.1);
      background: #4338ca;
    }

    @media (max-width: 1024px) {
      .card-grid-4, .timeline-wrap, .stats-card-grid {
        grid-template-columns: repeat(2, 1fr);
      }
      .card-grid-3, .workstation-grid, .showcase-grid, .feedback-grid, .news-grid {
        grid-template-columns: repeat(2, 1fr);
      }
      .footer-grid {
        grid-template-columns: repeat(2, 1fr);
      }
      .hero-h1 {
        font-size: 2.4rem;
      }
    }

    @media (max-width: 768px) {
      .menu-toggle {
        display: block;
      }
      .nav-links {
        display: none;
        position: absolute;
        top: 72px;
        left: 0;
        right: 0;
        background: #ffffff;
        flex-direction: column;
        padding: 20px;
        border-bottom: 1px solid var(--border-color);
        box-shadow: var(--shadow-md);
      }
      .nav-links.show {
        display: flex;
      }
      .nav-links a {
        width: 100%;
        padding: 10px 14px;
      }
      .header-action .btn {
        display: none;
      }
      .card-grid-3, .card-grid-4, .workstation-grid, .showcase-grid, .feedback-grid, .news-grid, .stats-card-grid, .timeline-wrap {
        grid-template-columns: 1fr;
      }
      .contact-layout {
        grid-template-columns: 1fr;
        padding: 24px;
      }
      .footer-grid {
        grid-template-columns: 1fr;
      }
      .rating-banner {
        flex-direction: column;
        align-items: flex-start;
      }
      .rating-scores {
        width: 100%;
        justify-content: space-between;
      }
      .hero-h1 {
        font-size: 1.85rem;
      }
      .section-title {
        font-size: 1.6rem;
      }
      .section-wrap {
        padding: 50px 0;
      }
    }