:root {
      --page-ok3333-primary-color: #ffcc00; /* Vàng rực rỡ */
      --page-ok3333-secondary-color: #333333; /* Xám đậm */
      --page-ok3333-accent-color: #e74c3c; /* Đỏ nhấn */
      --page-ok3333-text-light: #ffffff;
      --page-ok3333-text-dark: #333333;
      --page-ok3333-bg-dark: #1a1a1a;
      --page-ok3333-bg-light: #2c2c2c;
      --page-ok3333-border-color: #444444;
    }

    .page-ok3333 {
      font-family: 'Arial', sans-serif;
      color: var(--page-ok3333-text-light);
      background-color: var(--page-ok3333-bg-dark);
      line-height: 1.6;
      padding-top: 10px; /* Nhẹ nhàng cho phần đầu tiên sau header */
    }

    .page-ok3333__section {
      padding: 40px 20px;
      margin-bottom: 20px;
      border-radius: 8px;
      background-color: var(--page-ok3333-bg-light);
      box-shadow: 0 4px 15px rgba(0, 0, 0, 0.3);
      max-width: 1200px;
      margin-left: auto;
      margin-right: auto;
      box-sizing: border-box;
    }

    .page-ok3333__section--dark {
      background-color: var(--page-ok3333-secondary-color);
    }

    .page-ok3333__title {
      color: var(--page-ok3333-primary-color);
      text-align: center;
      margin-bottom: 30px;
      font-size: 2.5em;
      font-weight: bold;
      text-transform: uppercase;
      letter-spacing: 1px;
    }

    .page-ok3333__subtitle {
      color: var(--page-ok3333-text-light);
      text-align: center;
      margin-bottom: 40px;
      font-size: 1.2em;
      line-height: 1.8;
      max-width: 800px;
      margin-left: auto;
      margin-right: auto;
    }

    .page-ok3333__text {
      font-size: 1em;
      margin-bottom: 15px;
      color: var(--page-ok3333-text-light);
    }

    .page-ok3333__button {
      display: inline-block;
      background-color: var(--page-ok3333-primary-color);
      color: var(--page-ok3333-secondary-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;
      text-align: center;
    }

    .page-ok3333__button:hover {
      background-color: #ffd733;
      transform: translateY(-2px);
    }

    /* Floating Buttons */
    .page-ok3333__floating-buttons {
      position: fixed;
      bottom: 20px;
      right: 20px;
      display: flex;
      flex-direction: column;
      gap: 10px;
      z-index: 1000;
    }

    .page-ok3333__floating-button {
      background-color: var(--page-ok3333-accent-color);
      color: var(--page-ok3333-text-light);
      padding: 10px 20px;
      border-radius: 50px;
      font-weight: bold;
      text-align: center;
      box-shadow: 0 4px 10px rgba(0, 0, 0, 0.4);
      transition: background-color 0.3s ease, transform 0.2s ease;
      cursor: pointer;
      min-width: 100px;
    }

    .page-ok3333__floating-button:hover {
      background-color: #c0392b;
      transform: scale(1.05);
    }

    /* Hero Section */
    .page-ok3333__hero-section {
      text-align: center;
      padding: 60px 20px;
      background: linear-gradient(135deg, var(--page-ok3333-bg-dark), var(--page-ok3333-secondary-color));
      border-radius: 0; /* No border-radius for hero */
      margin-bottom: 0; /* No margin-bottom for hero */
    }

    .page-ok3333__hero-title {
      font-size: 3em;
      color: var(--page-ok3333-primary-color);
      margin-bottom: 20px;
      text-transform: uppercase;
      letter-spacing: 2px;
    }

    .page-ok3333__hero-description {
      font-size: 1.3em;
      color: var(--page-ok3333-text-light);
      max-width: 900px;
      margin: 0 auto 40px auto;
    }

    .page-ok3333__hero-image {
      width: 100%;
      max-width: 800px;
      height: auto;
      border-radius: 10px;
      margin-top: 30px;
      box-shadow: 0 8px 20px rgba(0, 0, 0, 0.5);
      object-fit: cover;
      display: block; /* Ensure it behaves like a block element */
      margin-left: auto;
      margin-right: auto;
    }

    /* Game Categories */
    .page-ok3333__categories-grid {
      display: grid;
      grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
      gap: 25px;
      margin-top: 30px;
    }

    .page-ok3333__category-item {
      background-color: var(--page-ok3333-bg-dark);
      border-radius: 10px;
      overflow: hidden;
      box-shadow: 0 6px 15px rgba(0, 0, 0, 0.4);
      text-align: center;
      transition: transform 0.3s ease, box-shadow 0.3s ease;
      box-sizing: border-box;
      width: 100%; /* Ensure full width on mobile */
    }

    .page-ok3333__category-item:hover {
      transform: translateY(-5px);
      box-shadow: 0 10px 25px rgba(0, 0, 0, 0.6);
    }

    .page-ok3333__category-image {
      width: 100%;
      height: 200px;
      object-fit: cover;
      border-bottom: 3px solid var(--page-ok3333-primary-color);
      max-width: 100%;
      box-sizing: border-box;
    }

    .page-ok3333__category-content {
      padding: 20px;
    }

    .page-ok3333__category-title {
      font-size: 1.5em;
      color: var(--page-ok3333-primary-color);
      margin-bottom: 10px;
    }

    .page-ok3333__category-description {
      font-size: 0.95em;
      color: var(--page-ok3333-text-light);
    }

    /* Promotions */
    .page-ok3333__promo-list {
      display: grid;
      grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
      gap: 30px;
      margin-top: 30px;
    }

    .page-ok3333__promo-card {
      background-color: var(--page-ok3333-bg-dark);
      border-radius: 10px;
      box-shadow: 0 5px 15px rgba(0, 0, 0, 0.3);
      padding: 25px;
      border-left: 5px solid var(--page-ok3333-accent-color);
      transition: transform 0.3s ease;
      box-sizing: border-box;
      width: 100%; /* Ensure full width on mobile */
    }

    .page-ok3333__promo-card:hover {
      transform: translateX(5px);
    }

    .page-ok3333__promo-title {
      font-size: 1.6em;
      color: var(--page-ok3333-primary-color);
      margin-bottom: 10px;
    }

    .page-ok3333__promo-text {
      font-size: 1em;
      color: var(--page-ok3333-text-light);
      margin-bottom: 15px;
    }

    /* Why Choose Us */
    .page-ok3333__features-grid {
      display: grid;
      grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
      gap: 25px;
      margin-top: 30px;
    }

    .page-ok3333__feature-item {
      background-color: var(--page-ok3333-bg-dark);
      border-radius: 10px;
      padding: 25px;
      text-align: center;
      box-shadow: 0 4px 10px rgba(0, 0, 0, 0.3);
      border: 1px solid var(--page-ok3333-border-color);
      box-sizing: border-box;
      width: 100%; /* Ensure full width on mobile */
    }

    .page-ok3333__feature-icon {
      width: 80px;
      height: 80px;
      margin-bottom: 15px;
      max-width: 100%;
      height: auto;
      object-fit: contain;
    }

    .page-ok3333__feature-title {
      font-size: 1.3em;
      color: var(--page-ok3333-primary-color);
      margin-bottom: 10px;
    }

    .page-ok3333__feature-description {
      font-size: 0.95em;
      color: var(--page-ok3333-text-light);
    }

    /* Payment & Providers */
    .page-ok3333__logos-grid {
      display: grid;
      grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
      gap: 20px;
      margin-top: 30px;
      justify-items: center;
      align-items: center;
    }

    .page-ok3333__logo-item {
      background-color: var(--page-ok3333-bg-dark);
      padding: 15px;
      border-radius: 8px;
      box-shadow: 0 2px 8px rgba(0, 0, 0, 0.2);
      transition: transform 0.2s ease;
      box-sizing: border-box;
      width: 100%; /* Ensure full width on mobile */
      max-width: 180px;
      display: flex;
      justify-content: center;
      align-items: center;
    }

    .page-ok3333__logo-item:hover {
      transform: scale(1.05);
    }

    .page-ok3333__logo-image {
      max-width: 100%;
      height: auto;
      max-height: 60px;
      object-fit: contain;
    }

    /* FAQ Section */
    .page-ok3333__faq-container {
      margin-top: 30px;
    }

    .page-ok3333__faq-item {
      background-color: var(--page-ok3333-bg-dark);
      margin-bottom: 15px;
      border-radius: 8px;
      overflow: hidden;
      box-shadow: 0 2px 10px rgba(0, 0, 0, 0.2);
      border: 1px solid var(--page-ok3333-border-color);
      box-sizing: border-box;
      width: 100%; /* Ensure full width on mobile */
    }

    .page-ok3333__faq-question {
      display: flex;
      justify-content: space-between;
      align-items: center;
      padding: 15px 20px;
      cursor: pointer;
      background-color: var(--page-ok3333-secondary-color);
      color: var(--page-ok3333-text-light);
      font-weight: bold;
      font-size: 1.1em;
      transition: background-color 0.3s ease;
      user-select: none;
    }

    .page-ok3333__faq-question:hover {
      background-color: #444444;
    }

    .page-ok3333__faq-question h3 {
      margin: 0;
      font-size: 1.1em;
      color: inherit;
      pointer-events: none; /* Prevent h3 from blocking click */
    }

    .page-ok3333__faq-toggle {
      font-size: 1.5em;
      line-height: 1;
      transition: transform 0.3s ease;
      pointer-events: none; /* Prevent toggle from blocking click */
    }

    .page-ok3333__faq-item.active .page-ok3333__faq-toggle {
      transform: rotate(45deg); /* Change + to X or - */
    }

    .page-ok3333__faq-answer {
      max-height: 0;
      overflow: hidden;
      padding: 0 20px;
      transition: max-height 0.4s cubic-bezier(0.4, 0, 0.2, 1), padding 0.4s ease, opacity 0.4s ease;
      color: var(--page-ok3333-text-light);
      background-color: var(--page-ok3333-bg-dark);
      opacity: 0;
    }

    .page-ok3333__faq-item.active .page-ok3333__faq-answer {
      max-height: 2000px !important; /* Use !important as required */
      padding: 20px !important; /* Use !important as required */
      opacity: 1;
    }

    /* Call to Action */
    .page-ok3333__cta-section {
      text-align: center;
      padding: 50px 20px;
      background-color: var(--page-ok3333-accent-color);
      border-radius: 8px;
    }

    .page-ok3333__cta-title {
      font-size: 2em;
      color: var(--page-ok3333-text-light);
      margin-bottom: 20px;
    }

    .page-ok3333__cta-text {
      font-size: 1.1em;
      color: var(--page-ok3333-text-light);
      margin-bottom: 30px;
      max-width: 700px;
      margin-left: auto;
      margin-right: auto;
    }

    /* Responsive Design */
    @media (max-width: 768px) {
      .page-ok3333__section {
        padding: 30px 15px;
        margin-bottom: 15px;
      }

      .page-ok3333__title {
        font-size: 2em;
        margin-bottom: 20px;
      }

      .page-ok3333__subtitle {
        font-size: 1em;
        margin-bottom: 30px;
      }

      .page-ok3333__hero-section {
        padding: 40px 15px;
      }

      .page-ok3333__hero-title {
        font-size: 2.2em;
      }

      .page-ok3333__hero-description {
        font-size: 1.1em;
        margin-bottom: 30px;
      }

      .page-ok3333__categories-grid,
      .page-ok3333__promo-list,
      .page-ok3333__features-grid,
      .page-ok3333__logos-grid {
        grid-template-columns: 1fr;
        gap: 20px;
      }

      .page-ok3333__category-item,
      .page-ok3333__promo-card,
      .page-ok3333__feature-item,
      .page-ok3333__logo-item,
      .page-ok3333__faq-item {
        width: 100% !important;
        max-width: 100% !important;
        box-sizing: border-box !important;
        margin-left: 0 !important;
        margin-right: 0 !important;
        word-wrap: break-word !important;
        overflow-wrap: break-word !important;
        word-break: break-word !important;
      }

      .page-ok3333__category-image,
      .page-ok3333__hero-image,
      .page-ok3333__feature-icon,
      .page-ok3333__logo-image {
        max-width: 100% !important;
        height: auto !important;
        box-sizing: border-box !important;
      }

      .page-ok3333__faq-question {
        padding: 12px 15px;
        font-size: 1em;
      }
      
      .page-ok3333__faq-question h3 {
        font-size: 1em;
      }

      .page-ok3333__faq-answer {
        padding: 0 15px;
      }

      .page-ok3333__faq-item.active .page-ok3333__faq-answer {
        padding: 15px !important;
      }

      .page-ok3333__floating-buttons {
        bottom: 15px;
        right: 15px;
      }

      .page-ok3333__floating-button {
        padding: 8px 15px;
        font-size: 0.9em;
        min-width: 80px;
      }
    }

    @media (max-width: 480px) {
      .page-ok3333__hero-title {
        font-size: 1.8em;
      }
      .page-ok3333__title {
        font-size: 1.8em;
      }
      .page-ok3333__cta-title {
        font-size: 1.5em;
      }
    }