:root {
      --primary: #2563eb;
      --primary-dark: #1d4ed8;
      --primary-light: #eff6ff;
      --accent: #f59e0b;
      --text-main: #1f2937;
      --text-muted: #4b5563;
      --bg-page: #f8fafc;
      --bg-card: #ffffff;
      --border-color: #e5e7eb;
      --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-page);
      color: var(--text-main);
      line-height: 1.6;
      overflow-x: hidden;
    }

    a {
      color: var(--primary);
      text-decoration: none;
      transition: color 0.2s ease;
    }

    a:hover {
      color: var(--primary-dark);
    }

    .container {
      width: 100%;
      max-width: var(--container-width);
      margin: 0 auto;
      padding: 0 20px;
    }

    /* Header */
    header {
      background-color: #ffffff;
      border-bottom: 1px solid var(--border-color);
      position: sticky;
      top: 0;
      z-index: 100;
      box-shadow: 0 2px 4px rgba(0,0,0,0.02);
    }

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

    .logo-box {
      display: flex;
      align-items: center;
      gap: 12px;
    }

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

    .nav-menu {
      display: flex;
      align-items: center;
    }

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

    .nav-links li a {
      padding: 8px 14px;
      color: var(--text-main);
      font-weight: 500;
      font-size: 15px;
      display: block;
    }

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

    .nav-actions {
      display: flex;
      align-items: center;
      gap: 12px;
    }

    .btn {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      padding: 10px 20px;
      border-radius: 6px;
      font-weight: 600;
      font-size: 14px;
      cursor: pointer;
      border: 1px solid transparent;
      transition: all 0.2s ease;
    }

    .btn-primary {
      background-color: var(--primary);
      color: #ffffff;
    }

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

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

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

    .menu-toggle {
      display: none;
      background: none;
      border: none;
      font-size: 24px;
      cursor: pointer;
      color: var(--text-main);
    }

    /* Hero Section - Strict No Image */
    .hero {
      padding: 80px 0 60px;
      background: linear-gradient(135deg, #ffffff 0%, #eff6ff 100%);
      border-bottom: 1px solid var(--border-color);
      text-align: center;
    }

    .hero-title {
      font-size: 2.2rem;
      font-weight: 800;
      color: var(--text-main);
      margin-bottom: 20px;
      line-height: 1.3;
    }

    .hero-desc {
      font-size: 1.15rem;
      color: var(--text-muted);
      max-width: 800px;
      margin: 0 auto 30px;
    }

    .hero-btns {
      display: flex;
      justify-content: center;
      gap: 16px;
      margin-bottom: 40px;
    }

    .hero-tags {
      display: flex;
      flex-wrap: wrap;
      justify-content: center;
      gap: 10px;
      max-width: 900px;
      margin: 0 auto;
    }

    .tag-chip {
      background: #ffffff;
      border: 1px solid #dbeafe;
      color: var(--primary);
      padding: 6px 14px;
      border-radius: 20px;
      font-size: 13px;
      font-weight: 500;
    }

    /* Section Styles */
    section {
      padding: 70px 0;
    }

    .section-title {
      text-align: center;
      margin-bottom: 45px;
    }

    .section-title h2 {
      font-size: 1.8rem;
      color: var(--text-main);
      margin-bottom: 10px;
    }

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

    /* Grid Layouts */
    .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;
    }

    /* Card Component */
    .card {
      background-color: var(--bg-card);
      border: 1px solid var(--border-color);
      border-radius: 8px;
      padding: 24px;
      transition: all 0.25s ease;
    }

    .card:hover {
      box-shadow: 0 10px 25px rgba(0,0,0,0.05);
      transform: translateY(-3px);
    }

    .card-icon {
      font-size: 28px;
      margin-bottom: 16px;
      color: var(--primary);
    }

    .card h3 {
      font-size: 1.2rem;
      margin-bottom: 10px;
      color: var(--text-main);
    }

    .card p {
      color: var(--text-muted);
      font-size: 0.95rem;
    }

    /* Stats Section */
    .stats-bar {
      background-color: #ffffff;
      border-top: 1px solid var(--border-color);
      border-bottom: 1px solid var(--border-color);
      padding: 40px 0;
    }

    .stat-item {
      text-align: center;
    }

    .stat-num {
      font-size: 2rem;
      font-weight: 700;
      color: var(--primary);
      margin-bottom: 5px;
    }

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

    /* Media Banner Section */
    .media-banner {
      background: #ffffff;
    }

    .banner-img-group {
      display: flex;
      gap: 20px;
      justify-content: center;
      align-items: center;
      flex-wrap: wrap;
    }

    .banner-img-group img {
      border-radius: 8px;
      box-shadow: 0 4px 12px rgba(0,0,0,0.08);
      max-width: 32%;
      height: auto;
    }

    /* Table Styles */
    .table-container {
      overflow-x: auto;
      background: #ffffff;
      border: 1px solid var(--border-color);
      border-radius: 8px;
    }

    table {
      width: 100%;
      border-collapse: collapse;
      text-align: left;
    }

    th, td {
      padding: 16px 20px;
      border-bottom: 1px solid var(--border-color);
    }

    th {
      background-color: #f9fafb;
      font-weight: 600;
      color: var(--text-main);
    }

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

    .badge-star {
      background-color: #fef3c7;
      color: #d97706;
      padding: 4px 8px;
      border-radius: 4px;
      font-weight: bold;
      font-size: 0.85rem;
    }

    /* FAQ Component */
    .faq-list {
      max-width: 900px;
      margin: 0 auto;
    }

    .faq-item {
      background: #ffffff;
      border: 1px solid var(--border-color);
      border-radius: 6px;
      margin-bottom: 12px;
      overflow: hidden;
    }

    .faq-question {
      padding: 18px 24px;
      font-weight: 600;
      cursor: pointer;
      display: flex;
      justify-content: space-between;
      align-items: center;
      background: #ffffff;
    }

    .faq-question:hover {
      background-color: #f9fafb;
    }

    .faq-answer {
      padding: 0 24px 18px;
      color: var(--text-muted);
      font-size: 0.95rem;
      display: none;
      border-top: 1px solid #f3f4f6;
      margin-top: 8px;
      padding-top: 16px;
    }

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

    /* Articles Link Section */
    .article-box {
      background: #ffffff;
      padding: 30px;
      border-radius: 8px;
      border: 1px solid var(--border-color);
    }

    .article-links {
      display: flex;
      flex-wrap: wrap;
      gap: 15px;
      margin-top: 15px;
    }

    .article-links a {
      background: var(--primary-light);
      padding: 8px 16px;
      border-radius: 4px;
      font-size: 0.9rem;
    }

    /* Form Section */
    .form-wrapper {
      background: #ffffff;
      padding: 40px;
      border-radius: 8px;
      border: 1px solid var(--border-color);
      max-width: 700px;
      margin: 0 auto;
    }

    .form-group {
      margin-bottom: 20px;
    }

    .form-group label {
      display: block;
      margin-bottom: 8px;
      font-weight: 500;
      color: var(--text-main);
    }

    .form-control {
      width: 100%;
      padding: 12px;
      border: 1px solid var(--border-color);
      border-radius: 6px;
      font-size: 0.95rem;
    }

    .form-control:focus {
      outline: none;
      border-color: var(--primary);
    }

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

    /* Footer */
    footer {
      background-color: #111827;
      color: #9ca3af;
      padding: 60px 0 30px;
      font-size: 0.9rem;
    }

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

    .footer-col h4 {
      color: #ffffff;
      font-size: 1rem;
      margin-bottom: 20px;
    }

    .footer-col p {
      margin-bottom: 12px;
      line-height: 1.5;
    }

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

    .footer-links li {
      margin-bottom: 10px;
    }

    .footer-links a {
      color: #9ca3af;
    }

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

    .qr-box {
      display: flex;
      align-items: center;
      gap: 15px;
    }

    .qr-box img {
      width: 100px;
      height: 100px;
      border-radius: 4px;
      background: #ffffff;
      padding: 4px;
    }

    .friend-links {
      border-top: 1px solid #374151;
      padding-top: 25px;
      margin-top: 25px;
      display: flex;
      flex-wrap: wrap;
      gap: 15px;
      align-items: center;
    }

    .friend-links a {
      color: #9ca3af;
    }

    .friend-links a:hover {
      color: #ffffff;
    }

    .footer-bottom {
      border-top: 1px solid #1f2937;
      padding-top: 25px;
      text-align: center;
      color: #6b7280;
    }

    /* Floating Contact */
    .float-contact {
      position: fixed;
      right: 20px;
      bottom: 30px;
      background: #ffffff;
      border: 1px solid var(--border-color);
      box-shadow: 0 4px 15px rgba(0,0,0,0.1);
      border-radius: 30px;
      padding: 8px 16px;
      display: flex;
      align-items: center;
      gap: 8px;
      z-index: 99;
      font-weight: 500;
    }

    /* Responsive */
    @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: 1fr 1fr; }
      .banner-img-group img { max-width: 48%; }
    }

    @media (max-width: 768px) {
      .menu-toggle { display: block; }
      .nav-menu {
        display: none;
        position: absolute;
        top: 70px;
        left: 0;
        width: 100%;
        background: #ffffff;
        border-bottom: 1px solid var(--border-color);
        padding: 20px;
        box-shadow: 0 10px 15px rgba(0,0,0,0.05);
      }
      .nav-menu.active { display: block; }
      .nav-links { flex-direction: column; align-items: flex-start; }
      .nav-links li { width: 100%; }
      .nav-links li a { padding: 10px 0; }
      .hero-title { font-size: 1.6rem; }
      .grid-3, .grid-2, .grid-4 { grid-template-columns: 1fr; }
      .footer-grid { grid-template-columns: 1fr; }
      .banner-img-group img { max-width: 100%; }
      .hero-btns { flex-direction: column; }
    }