:root {
      --primary-color: #059669;
      --primary-hover: #047857;
      --accent-color: #10b981;
      --accent-light: #ecfdf5;
      --highlight-lime: #84cc16;
      --text-dark: #0f172a;
      --text-muted: #475569;
      --bg-light: #f8fafc;
      --bg-white: #ffffff;
      --border-color: #e2e8f0;
      --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
      --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
      --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
      --max-width: 1200px;
    }

    * {
      box-sizing: border-box;
      margin: 0;
      padding: 0;
    }

    html {
      scroll-behavior: smooth;
      font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, "Noto Sans", sans-serif;
      background-color: var(--bg-light);
      color: var(--text-dark);
      line-height: 1.6;
    }

    body {
      display: flex;
      flex-direction: column;
      min-height: 100vh;
    }

    .container {
      width: 100%;
      max-width: var(--max-width);
      margin: 0 auto;
      padding: 0 1.25rem;
    }

    /* Header & Navigation */
    .site-header {
      position: sticky;
      top: 0;
      z-index: 1000;
      background-color: rgba(255, 255, 255, 0.95);
      backdrop-filter: blur(8px);
      border-bottom: 1px solid var(--border-color);
      box-shadow: var(--shadow-sm);
    }

    .nav-container {
      display: flex;
      align-items: center;
      justify-content: space-between;
      height: 70px;
    }

    .brand-logo {
      display: flex;
      align-items: center;
      gap: 0.5rem;
      text-decoration: none;
    }

    .ai-page-logo {
      height: 40px;
      width: auto;
      object-fit: contain;
    }

    .brand-name {
      font-size: 1.25rem;
      font-weight: 700;
      color: var(--primary-color);
      letter-spacing: -0.5px;
    }

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

    .nav-links li a {
      display: inline-block;
      padding: 0.5rem 0.65rem;
      font-size: 0.9rem;
      font-weight: 500;
      color: var(--text-muted);
      text-decoration: none;
      transition: color 0.2s ease;
      white-space: nowrap;
    }

    .nav-links li a:hover,
    .nav-links li a.active {
      color: var(--primary-color);
    }

    .nav-cta {
      display: flex;
      align-items: center;
      gap: 0.75rem;
    }

    .btn {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      padding: 0.6rem 1.25rem;
      font-size: 0.925rem;
      font-weight: 600;
      border-radius: 6px;
      text-decoration: none;
      cursor: pointer;
      transition: all 0.2s ease;
      border: 1px solid transparent;
    }

    .btn-primary {
      background-color: var(--primary-color);
      color: #ffffff;
      box-shadow: 0 2px 4px rgba(5, 150, 105, 0.2);
    }

    .btn-primary:hover {
      background-color: var(--primary-hover);
      transform: translateY(-1px);
    }

    .btn-outline {
      border-color: var(--primary-color);
      color: var(--primary-color);
      background-color: transparent;
    }

    .btn-outline:hover {
      background-color: var(--accent-light);
    }

    .mobile-menu-btn {
      display: none;
      background: none;
      border: none;
      font-size: 1.5rem;
      color: var(--text-dark);
      cursor: pointer;
    }

    /* Hero Section - STRICTLY NO IMAGES */
    .hero-section {
      background: linear-gradient(135deg, #022c22 0%, #064e3b 50%, #047857 100%);
      color: #ffffff;
      padding: 4.5rem 0;
      position: relative;
      overflow: hidden;
    }

    .hero-section::before {
      content: '';
      position: absolute;
      top: -50%;
      right: -10%;
      width: 500px;
      height: 500px;
      background: radial-gradient(circle, rgba(132, 204, 22, 0.15) 0%, rgba(0, 0, 0, 0) 70%);
      border-radius: 50%;
      pointer-events: none;
    }

    .hero-content {
      max-width: 850px;
      margin: 0 auto;
      text-align: center;
    }

    .hero-badge {
      display: inline-block;
      padding: 0.35rem 1rem;
      background-color: rgba(255, 255, 255, 0.15);
      border: 1px solid rgba(255, 255, 255, 0.25);
      border-radius: 50px;
      font-size: 0.85rem;
      font-weight: 500;
      color: #a7f3d0;
      margin-bottom: 1.5rem;
    }

    .hero-title {
      font-size: 2.25rem;
      font-weight: 800;
      line-height: 1.25;
      margin-bottom: 1.25rem;
      letter-spacing: -0.5px;
    }

    .hero-subtitle {
      font-size: 1.1rem;
      color: #d1fae5;
      margin-bottom: 2rem;
      line-height: 1.7;
    }

    .hero-actions {
      display: flex;
      justify-content: center;
      gap: 1rem;
      flex-wrap: wrap;
    }

    .btn-hero-main {
      background-color: var(--highlight-lime);
      color: #0f172a;
      font-size: 1rem;
      padding: 0.75rem 1.75rem;
      font-weight: 700;
    }

    .btn-hero-main:hover {
      background-color: #a3e635;
      transform: translateY(-2px);
    }

    .btn-hero-secondary {
      background-color: rgba(255, 255, 255, 0.1);
      color: #ffffff;
      border: 1px solid rgba(255, 255, 255, 0.3);
      padding: 0.75rem 1.75rem;
    }

    .btn-hero-secondary:hover {
      background-color: rgba(255, 255, 255, 0.2);
    }

    /* Stats Grid */
    .stats-bar {
      margin-top: 3rem;
      display: grid;
      grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
      gap: 1rem;
      border-top: 1px solid rgba(255, 255, 255, 0.15);
      padding-top: 2rem;
    }

    .stat-card {
      text-align: center;
      padding: 0.5rem;
    }

    .stat-number {
      font-size: 1.85rem;
      font-weight: 800;
      color: var(--highlight-lime);
    }

    .stat-label {
      font-size: 0.85rem;
      color: #a7f3d0;
    }

    /* Section Components */
    .section-padding {
      padding: 4.5rem 0;
    }

    .bg-white {
      background-color: var(--bg-white);
    }

    .bg-light {
      background-color: var(--bg-light);
    }

    .section-header {
      text-align: center;
      max-width: 750px;
      margin: 0 auto 3rem auto;
    }

    .section-tag {
      font-size: 0.85rem;
      font-weight: 700;
      color: var(--primary-color);
      text-transform: uppercase;
      letter-spacing: 1px;
      margin-bottom: 0.5rem;
      display: block;
    }

    .section-title {
      font-size: 1.85rem;
      font-weight: 800;
      color: var(--text-dark);
      margin-bottom: 0.75rem;
    }

    .section-desc {
      font-size: 1rem;
      color: var(--text-muted);
    }

    /* Grid Layouts */
    .grid-2 {
      display: grid;
      grid-template-columns: repeat(2, 1fr);
      gap: 2rem;
      align-items: center;
    }

    .grid-3 {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 1.5rem;
    }

    .grid-4 {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 1.25rem;
    }

    /* Cards */
    .card {
      background-color: var(--bg-white);
      border-radius: 8px;
      border: 1px solid var(--border-color);
      padding: 1.75rem;
      box-shadow: var(--shadow-sm);
      transition: all 0.25 ease;
      height: 100%;
      display: flex;
      flex-direction: column;
    }

    .card:hover {
      box-shadow: var(--shadow-md);
      transform: translateY(-3px);
      border-color: var(--accent-color);
    }

    .card-icon {
      width: 48px;
      height: 48px;
      border-radius: 8px;
      background-color: var(--accent-light);
      color: var(--primary-color);
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 1.35rem;
      font-weight: bold;
      margin-bottom: 1.25rem;
    }

    .card-title {
      font-size: 1.15rem;
      font-weight: 700;
      color: var(--text-dark);
      margin-bottom: 0.5rem;
    }

    .card-text {
      font-size: 0.925rem;
      color: var(--text-muted);
      flex-grow: 1;
    }

    /* Model Tags Badge Container */
    .model-tags {
      display: flex;
      flex-wrap: wrap;
      gap: 0.5rem;
      margin-top: 1rem;
    }

    .tag {
      background-color: var(--bg-light);
      border: 1px solid var(--border-color);
      padding: 0.25rem 0.6rem;
      border-radius: 4px;
      font-size: 0.8rem;
      color: var(--text-muted);
      font-weight: 500;
    }

    .tag-highlight {
      background-color: var(--accent-light);
      border-color: #a7f3d0;
      color: var(--primary-color);
    }

    /* Article & Media Lists */
    .media-card {
      background: var(--bg-white);
      border-radius: 8px;
      overflow: hidden;
      border: 1px solid var(--border-color);
      box-shadow: var(--shadow-sm);
    }

    .media-card img {
      width: 100%;
      height: 180px;
      object-fit: cover;
    }

    .media-body {
      padding: 1.25rem;
    }

    /* Table Styles */
    .table-responsive {
      width: 100%;
      overflow-x: auto;
      background: var(--bg-white);
      border-radius: 8px;
      border: 1px solid var(--border-color);
      box-shadow: var(--shadow-sm);
    }

    .custom-table {
      width: 100%;
      border-collapse: collapse;
      text-align: left;
      font-size: 0.925rem;
    }

    .custom-table th {
      background-color: var(--accent-light);
      color: var(--primary-color);
      font-weight: 700;
      padding: 1rem;
      border-bottom: 2px solid #a7f3d0;
    }

    .custom-table td {
      padding: 1rem;
      border-bottom: 1px solid var(--border-color);
    }

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

    .badge-rating {
      background-color: #fef08a;
      color: #854d0e;
      font-weight: 700;
      padding: 0.2rem 0.5rem;
      border-radius: 4px;
    }

    /* Form Design */
    .form-box {
      background-color: var(--bg-white);
      border-radius: 12px;
      padding: 2.25rem;
      border: 1px solid var(--border-color);
      box-shadow: var(--shadow-md);
    }

    .form-group {
      margin-bottom: 1.25rem;
    }

    .form-label {
      display: block;
      font-size: 0.9rem;
      font-weight: 600;
      color: var(--text-dark);
      margin-bottom: 0.4rem;
    }

    .form-input, .form-select, .form-textarea {
      width: 100%;
      padding: 0.65rem 0.85rem;
      border: 1px solid var(--border-color);
      border-radius: 6px;
      font-size: 0.925rem;
      color: var(--text-dark);
      background-color: var(--bg-white);
      transition: border-color 0.2s;
    }

    .form-input:focus, .form-select:focus, .form-textarea:focus {
      outline: none;
      border-color: var(--primary-color);
      box-shadow: 0 0 0 3px rgba(5, 150, 105, 0.1);
    }

    /* FAQ Accordion */
    .faq-container {
      max-width: 800px;
      margin: 0 auto;
    }

    .faq-item {
      background: var(--bg-white);
      border: 1px solid var(--border-color);
      border-radius: 6px;
      margin-bottom: 0.75rem;
      overflow: hidden;
    }

    .faq-title {
      padding: 1.25rem;
      font-weight: 600;
      cursor: pointer;
      display: flex;
      justify-content: space-between;
      align-items: center;
      color: var(--text-dark);
      background: var(--bg-white);
    }

    .faq-title::after {
      content: '+';
      font-size: 1.25rem;
      color: var(--primary-color);
      transition: transform 0.2s;
    }

    .faq-item.active .faq-title::after {
      content: '−';
    }

    .faq-content {
      padding: 0 1.25rem 1.25rem 1.25rem;
      color: var(--text-muted);
      font-size: 0.925rem;
      display: none;
      border-top: 1px dashed var(--border-color);
    }

    .faq-item.active .faq-content {
      display: block;
    }

    /* Reviews Section */
    .review-card {
      background: var(--bg-white);
      border: 1px solid var(--border-color);
      border-radius: 8px;
      padding: 1.5rem;
      box-shadow: var(--shadow-sm);
    }

    .review-user {
      display: flex;
      align-items: center;
      gap: 0.75rem;
      margin-top: 1rem;
    }

    .avatar-placeholder {
      width: 42px;
      height: 42px;
      border-radius: 50%;
      background-color: var(--accent-light);
      color: var(--primary-color);
      display: flex;
      align-items: center;
      justify-content: center;
      font-weight: 700;
    }

    .user-info .name {
      font-weight: 600;
      font-size: 0.95rem;
    }

    .user-info .role {
      font-size: 0.8rem;
      color: var(--text-muted);
    }

    /* Footer */
    .site-footer {
      background-color: #0f172a;
      color: #94a3b8;
      padding: 3.5rem 0 1.5rem 0;
      font-size: 0.9rem;
      margin-top: auto;
    }

    .footer-grid {
      display: grid;
      grid-template-columns: 2fr 1fr 1fr 1.5fr;
      gap: 2rem;
      margin-bottom: 2.5rem;
    }

    .footer-col h4 {
      color: #ffffff;
      font-size: 1rem;
      font-weight: 700;
      margin-bottom: 1.2rem;
    }

    .footer-links {
      list-style: none;
    }

    .footer-links li {
      margin-bottom: 0.6rem;
    }

    .footer-links a {
      color: #94a3b8;
      text-decoration: none;
      transition: color 0.2s;
    }

    .footer-links a:hover {
      color: var(--accent-color);
    }

    .footer-qr {
      text-align: center;
    }

    .footer-qr img {
      width: 110px;
      height: 110px;
      border-radius: 6px;
      background: white;
      padding: 4px;
      margin-bottom: 0.5rem;
    }

    .friend-links {
      border-top: 1px solid #1e293b;
      padding-top: 1.5rem;
      margin-top: 1.5rem;
      display: flex;
      flex-wrap: wrap;
      gap: 1rem;
      align-items: center;
    }

    .friend-links a {
      color: #64748b;
      text-decoration: none;
      font-size: 0.85rem;
    }

    .friend-links a:hover {
      color: var(--accent-color);
    }

    .copyright-bar {
      border-top: 1px solid #1e293b;
      padding-top: 1.5rem;
      text-align: center;
      font-size: 0.825rem;
      color: #64748b;
    }

    /* Fixed Floating Customer Entrance */
    .floating-kefu {
      position: fixed;
      right: 1.5rem;
      bottom: 2rem;
      z-index: 999;
      background: var(--bg-white);
      border: 1px solid var(--border-color);
      border-radius: 8px;
      padding: 0.75rem;
      box-shadow: var(--shadow-lg);
      text-align: center;
      max-width: 140px;
    }

    .floating-kefu img {
      width: 100px;
      height: 100px;
      border-radius: 4px;
    }

    .floating-kefu p {
      font-size: 0.75rem;
      font-weight: 600;
      color: var(--text-dark);
      margin-top: 0.3rem;
    }

    /* Responsive Adjustments */
    @media (max-width: 992px) {
      .grid-4 { grid-template-columns: repeat(2, 1fr); }
      .grid-3 { grid-template-columns: repeat(2, 1fr); }
      .footer-grid { grid-template-columns: repeat(2, 1fr); }
    }

    @media (max-width: 768px) {
      .mobile-menu-btn { display: block; }
      .nav-links {
        display: none;
        position: absolute;
        top: 70px;
        left: 0;
        right: 0;
        background-color: var(--bg-white);
        flex-direction: column;
        padding: 1rem 0;
        box-shadow: var(--shadow-md);
        border-bottom: 1px solid var(--border-color);
      }
      .nav-links.show { display: flex; }
      .nav-links li a { width: 100%; text-align: center; padding: 0.75rem 0; }
      .hero-title { font-size: 1.65rem; }
      .grid-2, .grid-3, .grid-4 { grid-template-columns: 1fr; }
      .footer-grid { grid-template-columns: 1fr; }
      .floating-kefu { display: none; }
    }