/* CSS cho trang 90okbet */
    :root {
      --page-90okbet-primary-color: #0056b3; /* Xanh đậm */
      --page-90okbet-secondary-color: #007bff; /* Xanh dương */
      --page-90okbet-accent-color: #ffc107; /* Vàng hổ phách */
      --page-90okbet-text-color: #333; /* Xám đen */
      --page-90okbet-light-text-color: #fff; /* Trắng */
      --page-90okbet-background-color: #f8f9fa; /* Xám nhạt */
      --page-90okbet-card-background: #ffffff; /* Trắng */
      --page-90okbet-border-color: #e9ecef; /* Xám viền */
      --page-90okbet-link-color: #007bff;
      --page-90okbet-link-hover-color: #0056b3;
    }

    .page-90okbet {
      font-family: 'Helvetica Neue', Helvetica, Arial, sans-serif;
      line-height: 1.6;
      color: var(--page-90okbet-text-color);
      background-color: var(--page-90okbet-background-color);
      padding: 20px 0;
    }

    .page-90okbet-container {
      max-width: 1200px;
      margin: 0 auto;
      padding: 0 15px;
    }

    .page-90okbet-section {
      background-color: var(--page-90okbet-card-background);
      border-radius: 8px;
      box-shadow: 0 4px 12px rgba(0, 0, 0, 0.08);
      margin-bottom: 30px;
      padding: 30px;
    }

    .page-90okbet-section-dark {
      background-color: var(--page-90okbet-primary-color);
      color: var(--page-90okbet-light-text-color);
      padding: 40px 30px;
      text-align: center;
    }
    .page-90okbet-section-dark h1,
    .page-90okbet-section-dark h2 {
      color: var(--page-90okbet-light-text-color);
    }

    .page-90okbet-title {
      font-size: 2.5em;
      color: var(--page-90okbet-primary-color);
      text-align: center;
      margin-bottom: 20px;
      font-weight: 700;
    }

    .page-90okbet-subtitle {
      font-size: 1.8em;
      color: var(--page-90okbet-secondary-color);
      margin-top: 30px;
      margin-bottom: 15px;
      font-weight: 600;
    }

    .page-90okbet-text {
      font-size: 1.1em;
      margin-bottom: 15px;
    }

    .page-90okbet-button {
      display: inline-block;
      background-color: var(--page-90okbet-accent-color);
      color: var(--page-90okbet-primary-color);
      padding: 12px 25px;
      border-radius: 5px;
      text-decoration: none;
      font-weight: bold;
      font-size: 1.1em;
      transition: background-color 0.3s ease, transform 0.2s ease;
      border: none;
      cursor: pointer;
    }

    .page-90okbet-button:hover {
      background-color: #e0a800; /* Darker accent */
      transform: translateY(-2px);
      color: var(--page-90okbet-primary-color); /* Ensure text color remains good */
    }

    .page-90okbet-button-primary {
      background-color: var(--page-90okbet-secondary-color);
      color: var(--page-90okbet-light-text-color);
    }

    .page-90okbet-button-primary:hover {
      background-color: var(--page-90okbet-primary-color);
      color: var(--page-90okbet-light-text-color);
    }

    .page-90okbet-list {
      list-style: none;
      padding: 0;
      margin: 0;
    }

    .page-90okbet-list li {
      margin-bottom: 10px;
      padding-left: 25px;
      position: relative;
      font-size: 1.05em;
    }

    .page-90okbet-list li::before {
      content: '✓';
      color: var(--page-90okbet-secondary-color);
      font-weight: bold;
      position: absolute;
      left: 0;
      top: 0;
    }

    .page-90okbet-grid {
      display: grid;
      grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
      gap: 25px;
      margin-top: 20px;
    }

    .page-90okbet-card {
      background-color: var(--page-90okbet-card-background);
      border-radius: 8px;
      box-shadow: 0 2px 8px rgba(0, 0, 0, 0.05);
      padding: 20px;
      text-align: center;
      transition: transform 0.2s ease;
      border: 1px solid var(--page-90okbet-border-color);
    }

    .page-90okbet-card:hover {
      transform: translateY(-5px);
    }

    .page-90okbet-card-icon {
      width: 60px;
      height: 60px;
      margin-bottom: 15px;
      vertical-align: middle;
    }

    .page-90okbet-card-title {
      font-size: 1.3em;
      color: var(--page-90okbet-primary-color);
      margin-bottom: 10px;
      font-weight: 600;
    }

    .page-90okbet-card-text {
      font-size: 0.95em;
      color: var(--page-90okbet-text-color);
    }

    .page-90okbet-image {
      max-width: 100%;
      height: auto;
      border-radius: 8px;
      margin-bottom: 20px;
      display: block;
    }

    .page-90okbet-faq-item {
      margin-bottom: 20px;
      border-bottom: 1px solid var(--page-90okbet-border-color);
      padding-bottom: 15px;
    }

    .page-90okbet-faq-question {
      font-weight: bold;
      color: var(--page-90okbet-primary-color);
      cursor: pointer;
      display: flex;
      justify-content: space-between;
      align-items: center;
      font-size: 1.1em;
    }

    .page-90okbet-faq-question::after {
      content: '+';
      font-size: 1.2em;
      transition: transform 0.3s ease;
    }

    .page-90okbet-faq-question.active::after {
      transform: rotate(45deg);
    }

    .page-90okbet-faq-answer {
      margin-top: 10px;
      color: var(--page-90okbet-text-color);
      display: none;
      font-size: 1em;
    }

    .page-90okbet-floating-ad {
      position: fixed;
      bottom: 20px;
      right: 20px;
      background-color: var(--page-90okbet-accent-color);
      color: var(--page-90okbet-primary-color);
      padding: 15px 20px;
      border-radius: 10px;
      box-shadow: 0 4px 15px rgba(0, 0, 0, 0.2);
      z-index: 1000;
      text-align: center;
      max-width: 250px;
      animation: page-90okbet-pulse 2s infinite;
      display: flex;
      flex-direction: column;
      align-items: center;
      justify-content: center;
    }

    .page-90okbet-floating-ad a {
      color: var(--page-90okbet-primary-color);
      text-decoration: none;
      font-weight: bold;
      margin-top: 10px;
      display: block;
    }

    .page-90okbet-floating-ad a:hover {
      text-decoration: underline;
    }

    @keyframes page-90okbet-pulse {
      0% { transform: scale(1); }
      50% { transform: scale(1.03); }
      100% { transform: scale(1); }
    }

    /* Responsive adjustments */
    @media (max-width: 768px) {
      .page-90okbet-title {
        font-size: 2em;
      }
      .page-90okbet-subtitle {
        font-size: 1.5em;
      }
      .page-90okbet-section {
        padding: 20px;
      }
      .page-90okbet-grid {
        grid-template-columns: 1fr;
      }
      .page-90okbet-floating-ad {
        width: calc(100% - 40px);
        left: 20px;
        right: 20px;
        bottom: 15px;
        max-width: none;
      }
    }