/* CSS dành riêng cho trang ko66 */
    :root {
      --page-ko66-primary-color: #e60000; /* Đỏ mạnh */
      --page-ko66-secondary-color: #ff9900; /* Cam */
      --page-ko66-text-dark: #333333;
      --page-ko66-text-light: #ffffff;
      --page-ko66-bg-light: #f8f8f8;
      --page-ko66-bg-dark: #222222;
      --page-ko66-border-color: #dddddd;
      --page-ko66-shadow: 0 4px 8px rgba(0, 0, 0, 0.1);
      --page-ko66-border-radius: 8px;
    }

    .page-ko66 {
      font-family: 'Arial', sans-serif;
      line-height: 1.6;
      color: var(--page-ko66-text-dark);
      background-color: var(--page-ko66-bg-light);
      padding: 20px 0;
    }

    .page-ko66-container {
      max-width: 1200px;
      margin: 0 auto;
      padding: 0 15px;
    }

    .page-ko66-hero {
      background: linear-gradient(135deg, var(--page-ko66-primary-color), var(--page-ko66-secondary-color));
      color: var(--page-ko66-text-light);
      padding: 60px 20px;
      text-align: center;
      border-radius: var(--page-ko66-border-radius);
      margin-bottom: 40px;
      box-shadow: var(--page-ko66-shadow);
      position: relative;
      overflow: hidden;
    }

    .page-ko66-hero::before {
      content: '';
      position: absolute;
      top: 0;
      left: 0;
      width: 100%;
      height: 100%;
      background-image: url('[GALLERY:pattern:abstract,geometric,light]');
      opacity: 0.1;
      pointer-events: none;
    }

    .page-ko66-hero h1 {
      font-size: 2.8em;
      margin-bottom: 20px;
      font-weight: bold;
      color: var(--page-ko66-text-light);
      text-shadow: 2px 2px 4px rgba(0, 0, 0, 0.3);
    }

    .page-ko66-hero p {
      font-size: 1.2em;
      margin-bottom: 30px;
      max-width: 800px;
      margin-left: auto;
      margin-right: auto;
    }

    .page-ko66-btn {
      display: inline-block;
      background-color: var(--page-ko66-bg-dark);
      color: var(--page-ko66-text-light);
      padding: 15px 30px;
      border-radius: 50px;
      text-decoration: none;
      font-weight: bold;
      font-size: 1.1em;
      transition: background-color 0.3s ease, transform 0.2s ease;
      box-shadow: 0 6px 12px rgba(0, 0, 0, 0.2);
    }

    .page-ko66-btn:hover {
      background-color: #000000;
      transform: translateY(-2px);
    }

    .page-ko66-section {
      background-color: var(--page-ko66-text-light);
      padding: 40px;
      border-radius: var(--page-ko66-border-radius);
      margin-bottom: 30px;
      box-shadow: var(--page-ko66-shadow);
    }

    .page-ko66-section h2 {
      font-size: 2em;
      color: var(--page-ko66-primary-color);
      margin-bottom: 25px;
      text-align: center;
      border-bottom: 3px solid var(--page-ko66-secondary-color);
      padding-bottom: 10px;
      display: inline-block;
      width: auto;
      max-width: 100%;
      margin-left: auto;
      margin-right: auto;
    }

    .page-ko66-section h3 {
      font-size: 1.5em;
      color: var(--page-ko66-text-dark);
      margin-top: 30px;
      margin-bottom: 15px;
      border-left: 5px solid var(--page-ko66-primary-color);
      padding-left: 10px;
    }

    .page-ko66-grid {
      display: grid;
      grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
      gap: 25px;
      margin-top: 30px;
    }

    .page-ko66-card {
      background-color: var(--page-ko66-bg-light);
      border: 1px solid var(--page-ko66-border-color);
      border-radius: var(--page-ko66-border-radius);
      padding: 25px;
      text-align: center;
      box-shadow: 0 2px 4px rgba(0, 0, 0, 0.05);
      transition: transform 0.3s ease, box-shadow 0.3s ease;
    }

    .page-ko66-card:hover {
      transform: translateY(-5px);
      box-shadow: 0 8px 16px rgba(0, 0, 0, 0.15);
    }

    .page-ko66-card img {
      max-width: 100%;
      height: 150px;
      object-fit: cover;
      border-radius: var(--page-ko66-border-radius);
      margin-bottom: 15px;
    }

    .page-ko66-card h4 {
      font-size: 1.3em;
      color: var(--page-ko66-primary-color);
      margin-bottom: 10px;
    }

    .page-ko66-card p {
      font-size: 0.95em;
      color: var(--page-ko66-text-dark);
    }

    .page-ko66-list {
      list-style-type: none;
      padding-left: 0;
      margin-top: 20px;
    }

    .page-ko66-list li {
      background-color: #f0f0f0;
      margin-bottom: 10px;
      padding: 15px;
      border-left: 4px solid var(--page-ko66-primary-color);
      border-radius: 4px;
      font-size: 1.05em;
      display: flex;
      align-items: center;
    }

    .page-ko66-list li::before {
      content: '✓';
      color: var(--page-ko66-primary-color);
      font-weight: bold;
      margin-right: 10px;
      font-size: 1.2em;
    }

    .page-ko66-game-grid {
      display: grid;
      grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
      gap: 15px;
      margin-top: 20px;
    }

    .page-ko66-game-item {
      text-align: center;
      background-color: #fefefe;
      padding: 15px;
      border-radius: var(--page-ko66-border-radius);
      box-shadow: 0 1px 3px rgba(0, 0, 0, 0.08);
      transition: transform 0.2s ease;
    }

    .page-ko66-game-item:hover {
      transform: translateY(-3px);
    }

    .page-ko66-game-item img {
      width: 80px;
      height: 80px;
      object-fit: contain;
      margin-bottom: 10px;
      border-radius: 50%;
      border: 2px solid var(--page-ko66-secondary-color);
    }

    .page-ko66-game-item p {
      font-weight: bold;
      color: var(--page-ko66-text-dark);
      font-size: 0.95em;
    }

    .page-ko66-cta-banner {
      background: linear-gradient(90deg, var(--page-ko66-primary-color), var(--page-ko66-secondary-color));
      color: var(--page-ko66-text-light);
      padding: 30px;
      text-align: center;
      border-radius: var(--page-ko66-border-radius);
      margin-top: 40px;
      box-shadow: var(--page-ko66-shadow);
    }

    .page-ko66-cta-banner h2 {
      color: var(--page-ko66-text-light);
      margin-bottom: 15px;
      font-size: 2em;
    }

    .page-ko66-cta-banner p {
      font-size: 1.1em;
      margin-bottom: 25px;
    }

    .page-ko66-faq-item {
      background-color: #fefefe;
      border: 1px solid var(--page-ko66-border-color);
      border-radius: var(--page-ko66-border-radius);
      margin-bottom: 15px;
      overflow: hidden;
    }

    .page-ko66-faq-question {
      padding: 18px 25px;
      font-size: 1.1em;
      font-weight: bold;
      color: var(--page-ko66-primary-color);
      cursor: pointer;
      display: flex;
      justify-content: space-between;
      align-items: center;
      background-color: #f0f0f0;
      border-bottom: 1px solid var(--page-ko66-border-color);
      transition: background-color 0.3s ease;
    }

    .page-ko66-faq-question:hover {
      background-color: #e0e0e0;
    }

    .page-ko66-faq-question.active {
      background-color: var(--page-ko66-secondary-color);
      color: var(--page-ko66-text-light);
    }

    .page-ko66-faq-question.active .page-ko66-faq-icon {
      transform: rotate(180deg);
    }

    .page-ko66-faq-icon {
      font-size: 1.5em;
      transition: transform 0.3s ease;
    }

    .page-ko66-faq-answer {
      padding: 0 25px;
      background-color: var(--page-ko66-text-light);
      max-height: 0;
      overflow: hidden;
      transition: max-height 0.4s ease-out;
    }

    .page-ko66-faq-answer p {
      padding: 15px 0;
      margin: 0;
      color: var(--page-ko66-text-dark);
    }

    /* Floating CTA */
    .page-ko66-floating-cta {
      position: fixed;
      bottom: 20px;
      right: 20px;
      background: linear-gradient(45deg, var(--page-ko66-primary-color), var(--page-ko66-secondary-color));
      color: var(--page-ko66-text-light);
      padding: 12px 20px;
      border-radius: 30px;
      text-align: center;
      text-decoration: none;
      font-weight: bold;
      font-size: 1.1em;
      box-shadow: 0 4px 10px rgba(0, 0, 0, 0.3);
      z-index: 1000;
      transition: transform 0.3s ease, box-shadow 0.3s ease;
      display: flex;
      align-items: center;
      gap: 10px;
    }

    .page-ko66-floating-cta:hover {
      transform: translateY(-3px);
      box-shadow: 0 6px 15px rgba(0, 0, 0, 0.4);
    }

    .page-ko66-floating-cta span {
      animation: page-ko66-pulse 1.5s infinite;
    }

    @keyframes page-ko66-pulse {
      0% { transform: scale(1); }
      50% { transform: scale(1.05); }
      100% { transform: scale(1); }
    }

    /* Responsive adjustments */
    @media (max-width: 768px) {
      .page-ko66-hero {
        padding: 40px 15px;
      }
      .page-ko66-hero h1 {
        font-size: 2em;
      }
      .page-ko66-hero p {
        font-size: 1em;
      }
      .page-ko66-section {
        padding: 25px;
      }
      .page-ko66-section h2 {
        font-size: 1.7em;
      }
      .page-ko66-grid {
        grid-template-columns: 1fr;
      }
      .page-ko66-floating-cta {
        bottom: 15px;
        right: 15px;
        padding: 10px 15px;
        font-size: 1em;
      }
    }

    @media (max-width: 480px) {
      .page-ko66-hero h1 {
        font-size: 1.8em;
      }
      .page-ko66-btn {
        padding: 12px 25px;
        font-size: 1em;
      }
      .page-ko66-section h2 {
        font-size: 1.5em;
      }
      .page-ko66-game-grid {
        grid-template-columns: repeat(auto-fit, minmax(120px, 1fr));
      }
    }