:root {
      --page-99okwin__primary-color: #007bff; /* Xanh dương */
      --page-99okwin__secondary-color: #ffc107; /* Vàng */
      --page-99okwin__dark-background: #212529; /* Đen xám */
      --page-99okwin__light-background: #f8f9fa; /* Trắng xám */
      --page-99okwin__text-color: #343a40; /* Xám đậm */
      --page-99okwin__white-text: #ffffff; /* Trắng */
      --page-99okwin__border-color: #dee2e6; /* Xám nhạt */
      --page-99okwin__success-color: #28a745; /* Xanh lá */
      --page-99okwin__danger-color: #dc3545; /* Đỏ */
    }

    .page-99okwin {
      font-family: 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
      line-height: 1.6;
      color: var(--page-99okwin__text-color);
      background-color: var(--page-99okwin__light-background);
      margin: 0;
      padding: 0;
      box-sizing: border-box;
    }

    .page-99okwin * {
      box-sizing: border-box;
    }

    .page-99okwin__hero-section {
      position: relative;
      width: 100%;
      text-align: center;
      padding-top: 10px; /* Desktop */
      background-color: var(--page-99okwin__dark-background);
      overflow: hidden;
      display: flex;
      flex-direction: column;
      align-items: center;
      justify-content: center;
    }

    .page-99okwin__hero-image {
      max-width: 100%;
      height: auto;
      display: block;
      margin: 0 auto;
      border-radius: 8px;
      box-shadow: 0 4px 15px rgba(0, 0, 0, 0.2);
    }

    .page-99okwin__hero-content {
      position: relative;
      z-index: 2;
      padding: 20px;
      color: var(--page-99okwin__white-text);
      max-width: 900px;
      margin: 0 auto;
    }

    .page-99okwin__hero-title {
      font-size: 2.8em;
      margin-bottom: 15px;
      color: var(--page-99okwin__secondary-color);
      text-shadow: 2px 2px 4px rgba(0, 0, 0, 0.5);
    }

    .page-99okwin__hero-description {
      font-size: 1.2em;
      margin-bottom: 30px;
      max-width: 800px;
      margin-left: auto;
      margin-right: auto;
    }

    .page-99okwin__cta-button {
      display: inline-block;
      background-color: var(--page-99okwin__primary-color);
      color: var(--page-99okwin__white-text);
      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 4px 10px rgba(0, 123, 255, 0.4);
    }

    .page-99okwin__cta-button:hover {
      background-color: #0056b3;
      transform: translateY(-2px);
    }

    .page-99okwin__floating-button {
      position: fixed;
      bottom: 20px;
      right: 20px;
      background-color: var(--page-99okwin__danger-color);
      color: var(--page-99okwin__white-text);
      padding: 15px 25px;
      border-radius: 50px;
      text-decoration: none;
      font-weight: bold;
      font-size: 1.1em;
      box-shadow: 0 5px 15px rgba(220, 53, 69, 0.4);
      z-index: 1000;
      animation: page-99okwin__pulse 1.5s infinite;
      text-align: center;
      white-space: nowrap; /* Ensure text stays on one line */
    }

    .page-99okwin__floating-button:hover {
      background-color: #c82333;
      animation: none;
    }

    @keyframes page-99okwin__pulse {
      0% { transform: scale(1); }
      50% { transform: scale(1.05); }
      100% { transform: scale(1); }
    }

    .page-99okwin__section {
      padding: 40px 20px;
      margin: 0 auto;
      max-width: 1200px;
    }

    .page-99okwin__section-title {
      font-size: 2.2em;
      color: var(--page-99okwin__primary-color);
      text-align: center;
      margin-bottom: 30px;
      position: relative;
      padding-bottom: 10px;
    }

    .page-99okwin__section-title::after {
      content: '';
      position: absolute;
      left: 50%;
      bottom: 0;
      transform: translateX(-50%);
      width: 80px;
      height: 4px;
      background-color: var(--page-99okwin__secondary-color);
      border-radius: 2px;
    }

    .page-99okwin__intro-text {
      font-size: 1.1em;
      text-align: center;
      margin-bottom: 40px;
      max-width: 800px;
      margin-left: auto;
      margin-right: auto;
    }

    .page-99okwin__game-categories {
      display: grid;
      grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
      gap: 25px;
      margin-top: 30px;
    }

    .page-99okwin__game-card {
      background-color: var(--page-99okwin__white-text);
      border-radius: 12px;
      box-shadow: 0 6px 20px rgba(0, 0, 0, 0.1);
      overflow: hidden;
      text-align: center;
      transition: transform 0.3s ease, box-shadow 0.3s ease;
      display: flex;
      flex-direction: column;
      height: 100%;
    }

    .page-99okwin__game-card:hover {
      transform: translateY(-8px);
      box-shadow: 0 10px 30px rgba(0, 0, 0, 0.15);
    }

    .page-99okwin__game-image-container {
      width: 100%;
      height: 200px; /* Fixed height for image consistency */
      overflow: hidden;
      display: flex;
      align-items: center;
      justify-content: center;
      background-color: #e9ecef; /* Placeholder background */
    }

    .page-99okwin__game-image {
      max-width: 100%;
      height: auto;
      display: block;
      object-fit: cover; /* Ensures image covers container without distortion */
      min-height: 200px; /* Ensure minimum size */
      min-width: 200px; /* Ensure minimum size */
    }

    .page-99okwin__game-content {
      padding: 20px;
      flex-grow: 1;
      display: flex;
      flex-direction: column;
      justify-content: space-between;
    }

    .page-99okwin__game-title {
      font-size: 1.4em;
      color: var(--page-99okwin__primary-color);
      margin-bottom: 10px;
      font-weight: bold;
    }

    .page-99okwin__game-description {
      font-size: 0.95em;
      color: var(--page-99okwin__text-color);
      margin-bottom: 15px;
      flex-grow: 1;
    }

    .page-99okwin__game-link {
      display: inline-block;
      background-color: var(--page-99okwin__secondary-color);
      color: var(--page-99okwin__dark-background);
      padding: 10px 20px;
      border-radius: 25px;
      text-decoration: none;
      font-weight: bold;
      font-size: 0.9em;
      transition: background-color 0.3s ease;
    }

    .page-99okwin__game-link:hover {
      background-color: #e0a800;
    }

    .page-99okwin__promotions-grid {
      display: grid;
      grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
      gap: 25px;
      margin-top: 30px;
    }

    .page-99okwin__promo-card {
      background-color: var(--page-99okwin__white-text);
      border-radius: 12px;
      box-shadow: 0 6px 20px rgba(0, 0, 0, 0.1);
      overflow: hidden;
      transition: transform 0.3s ease, box-shadow 0.3s ease;
      display: flex;
      flex-direction: column;
    }

    .page-99okwin__promo-card:hover {
      transform: translateY(-8px);
      box-shadow: 0 10px 30px rgba(0, 0, 0, 0.15);
    }

    .page-99okwin__promo-image-container {
      width: 100%;
      height: 220px;
      overflow: hidden;
      display: flex;
      align-items: center;
      justify-content: center;
      background-color: #e9ecef;
    }

    .page-99okwin__promo-image {
      max-width: 100%;
      height: auto;
      display: block;
      object-fit: cover;
      min-height: 220px; /* Ensure minimum size */
      min-width: 220px; /* Ensure minimum size */
    }

    .page-99okwin__promo-content {
      padding: 20px;
      flex-grow: 1;
    }

    .page-99okwin__promo-title {
      font-size: 1.5em;
      color: var(--page-99okwin__danger-color);
      margin-bottom: 10px;
      font-weight: bold;
    }

    .page-99okwin__promo-description {
      font-size: 0.95em;
      color: var(--page-99okwin__text-color);
      margin-bottom: 15px;
    }

    .page-99okwin__promo-button {
      display: inline-block;
      background-color: var(--page-99okwin__primary-color);
      color: var(--page-99okwin__white-text);
      padding: 10px 20px;
      border-radius: 25px;
      text-decoration: none;
      font-weight: bold;
      font-size: 0.9em;
      transition: background-color 0.3s ease;
    }

    .page-99okwin__promo-button:hover {
      background-color: #0056b3;
    }

    .page-99okwin__why-choose {
      background-color: #eaf6ff;
      padding: 60px 20px;
      text-align: center;
    }

    .page-99okwin__features-grid {
      display: grid;
      grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
      gap: 30px;
      margin-top: 40px;
    }

    .page-99okwin__feature-item {
      background-color: var(--page-99okwin__white-text);
      padding: 30px;
      border-radius: 12px;
      box-shadow: 0 4px 15px rgba(0, 0, 0, 0.08);
      text-align: center;
      transition: transform 0.3s ease;
    }

    .page-99okwin__feature-item:hover {
      transform: translateY(-5px);
    }

    .page-99okwin__feature-icon {
      max-width: 120px; /* Increased size */
      height: auto;
      margin-bottom: 20px;
      min-width: 200px; /* Enforce minimum size */
      min-height: 200px; /* Enforce minimum size */
    }

    .page-99okwin__feature-title {
      font-size: 1.5em;
      color: var(--page-99okwin__primary-color);
      margin-bottom: 15px;
    }

    .page-99okwin__feature-description {
      font-size: 1em;
      color: var(--page-99okwin__text-color);
    }

    .page-99okwin__how-to-start {
      background-color: var(--page-99okwin__dark-background);
      color: var(--page-99okwin__white-text);
      padding: 60px 20px;
      text-align: center;
    }

    .page-99okwin__how-to-start .page-99okwin__section-title {
      color: var(--page-99okwin__secondary-color);
    }

    .page-99okwin__steps-grid {
      display: grid;
      grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
      gap: 30px;
      margin-top: 40px;
    }

    .page-99okwin__step-item {
      background-color: #343a40;
      padding: 30px;
      border-radius: 12px;
      box-shadow: 0 4px 15px rgba(0, 0, 0, 0.2);
      text-align: center;
    }

    .page-99okwin__step-number {
      font-size: 2.5em;
      color: var(--page-99okwin__primary-color);
      font-weight: bold;
      margin-bottom: 15px;
    }

    .page-99okwin__step-title {
      font-size: 1.4em;
      color: var(--page-99okwin__secondary-color);
      margin-bottom: 15px;
    }

    .page-99okwin__step-description {
      font-size: 1em;
      color: #ced4da;
    }

    .page-99okwin__faq-section {
      background-color: var(--page-99okwin__light-background);
      padding: 60px 20px;
    }

    .page-99okwin__faq-container {
      max-width: 900px;
      margin: 40px auto 0 auto;
    }

    .page-99okwin__faq-item {
      background-color: var(--page-99okwin__white-text);
      border: 1px solid var(--page-99okwin__border-color);
      border-radius: 8px;
      margin-bottom: 15px;
      overflow: hidden;
      box-shadow: 0 2px 10px rgba(0, 0, 0, 0.05);
    }

    .page-99okwin__faq-question {
      display: flex;
      justify-content: space-between;
      align-items: center;
      padding: 18px 20px;
      cursor: pointer;
      font-size: 1.1em;
      font-weight: bold;
      color: var(--page-99okwin__primary-color);
      background-color: #f1f7fe;
      border-bottom: 1px solid transparent;
      transition: background-color 0.3s ease, border-bottom-color 0.3s ease;
      user-select: none;
    }

    .page-99okwin__faq-question:hover {
      background-color: #e7f0ff;
    }

    .page-99okwin__faq-item.active .page-99okwin__faq-question {
      border-bottom-color: var(--page-99okwin__border-color);
    }

    .page-99okwin__faq-question h3 {
      margin: 0;
      font-size: 1.1em;
      color: inherit;
      pointer-events: none; /* Prevent h3 from blocking click */
      flex-grow: 1;
      text-align: left;
    }

    .page-99okwin__faq-toggle {
      font-size: 1.5em;
      line-height: 1;
      margin-left: 15px;
      pointer-events: none; /* Prevent toggle icon from blocking click */
      transition: transform 0.3s ease;
      color: var(--page-99okwin__text-color);
    }

    .page-99okwin__faq-item.active .page-99okwin__faq-toggle {
      transform: rotate(45deg); /* Plus to X / Minus */
      color: var(--page-99okwin__danger-color);
    }

    .page-99okwin__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 0.3s ease;
      color: var(--page-99okwin__text-color);
      font-size: 0.95em;
      opacity: 0;
    }

    .page-99okwin__faq-item.active .page-99okwin__faq-answer {
      max-height: 2000px !important; /* Sufficiently large */
      padding: 20px 20px !important;
      opacity: 1;
    }

    .page-99okwin__faq-answer p {
      margin-top: 0;
      margin-bottom: 10px;
    }

    .page-99okwin__cta-final {
      text-align: center;
      padding: 50px 20px;
      background-color: var(--page-99okwin__primary-color);
      color: var(--page-99okwin__white-text);
    }

    .page-99okwin__cta-final-title {
      font-size: 2.5em;
      margin-bottom: 20px;
      color: var(--page-99okwin__secondary-color);
    }

    .page-99okwin__cta-final-description {
      font-size: 1.2em;
      margin-bottom: 30px;
      max-width: 800px;
      margin-left: auto;
      margin-right: auto;
    }

    /* Responsive adjustments */
    @media (max-width: 992px) {
      .page-99okwin__hero-title {
        font-size: 2.4em;
      }
      .page-99okwin__section-title {
        font-size: 2em;
      }
      .page-99okwin__game-categories,
      .page-99okwin__promotions-grid,
      .page-99okwin__features-grid,
      .page-99okwin__steps-grid {
        grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
      }
    }

    @media (max-width: 768px) {
      .page-99okwin__hero-section {
        padding-top: 10px !important; /* Mobile */
      }
      .page-99okwin__hero-title {
        font-size: 2em;
      }
      .page-99okwin__hero-description {
        font-size: 1em;
      }
      .page-99okwin__cta-button {
        padding: 12px 25px;
        font-size: 1em;
      }
      .page-99okwin__floating-button {
        padding: 12px 20px;
        font-size: 1em;
        bottom: 15px;
        right: 15px;
      }
      .page-99okwin__section {
        padding: 30px 15px;
      }
      .page-99okwin__section-title {
        font-size: 1.8em;
      }
      .page-99okwin__intro-text {
        font-size: 0.95em;
      }
      .page-99okwin__game-card,
      .page-99okwin__promo-card,
      .page-99okwin__feature-item,
      .page-99okwin__step-item {
        margin-bottom: 15px;
      }
      .page-99okwin__game-image-container,
      .page-99okwin__promo-image-container {
        height: 180px;
      }
      .page-99okwin__game-image,
      .page-99okwin__promo-image,
      .page-99okwin__feature-icon {
        max-width: 100% !important;
        height: auto !important;
        min-width: unset !important;
        min-height: unset !important;
      }
      .page-99okwin__game-card,
      .page-99okwin__promo-card {
        width: 100%;
        max-width: 100%;
        overflow: hidden;
        box-sizing: border-box;
      }
      .page-99okwin__faq-question {
        padding: 15px 15px;
        font-size: 1em;
      }
      .page-99okwin__faq-question h3 {
        font-size: 1em;
      }
      .page-99okwin__faq-answer {
        padding: 0 15px;
        font-size: 0.9em;
      }
      .page-99okwin__faq-item.active .page-99okwin__faq-answer {
        padding: 15px 15px !important;
      }
      .page-99okwin__cta-final-title {
        font-size: 2em;
      }
      .page-99okwin__cta-final-description {
        font-size: 1em;
      }
    }

    @media (max-width: 480px) {
      .page-99okwin__hero-title {
        font-size: 1.8em;
      }
      .page-99okwin__cta-button {
        padding: 10px 20px;
        font-size: 0.9em;
      }
      .page-99okwin__floating-button {
        padding: 10px 15px;
        font-size: 0.9em;
      }
      .page-99okwin__section-title {
        font-size: 1.6em;
      }
      .page-99okwin__game-categories,
      .page-99okwin__promotions-grid,
      .page-99okwin__features-grid,
      .page-99okwin__steps-grid {
        grid-template-columns: 1fr;
      }
      .page-99okwin__game-image-container,
      .page-99okwin__promo-image-container {
        height: 160px;
      }
      .page-99okwin__feature-icon {
        max-width: 100%;
        height: auto;
      }
    }