/* Tổng quan và biến */
    :root {
      --page-ok9aacom__primary-color: #fdd835; /* Vàng */
      --page-ok9aacom__secondary-color: #ffffff; /* Trắng */
      --page-ok9aacom__dark-background: #000000; /* Đen */
      --page-ok9aacom__text-color: var(--page-ok9aacom__secondary-color);
      --page-ok9aacom__link-color: var(--page-ok9aacom__primary-color);
      --page-ok9aacom__border-radius: 8px;
      --page-ok9aacom__spacing-small: 10px;
      --page-ok9aacom__spacing-medium: 20px;
      --page-ok9aacom__spacing-large: 40px;
    }

    .page-ok9aacom {
      font-family: 'Arial', sans-serif;
      background-color: var(--page-ok9aacom__dark-background);
      color: var(--page-ok9aacom__text-color);
      line-height: 1.6;
      overflow-x: hidden; /* Ngăn chặn cuộn ngang */
    }

    .page-ok9aacom a {
      color: var(--page-ok9aacom__link-color);
      text-decoration: none;
      transition: color 0.3s ease;
    }

    .page-ok9aacom a:hover {
      color: #ffd700; /* Vàng đậm hơn khi hover */
    }

    .page-ok9aacom__container {
      max-width: 1200px;
      margin: 0 auto;
      padding: 0 var(--page-ok9aacom__spacing-medium);
      box-sizing: border-box;
    }

    .page-ok9aacom__section {
      padding: var(--page-ok9aacom__spacing-large) 0;
      text-align: center;
    }

    .page-ok9aacom__section-title {
      font-size: 2.5em;
      color: var(--page-ok9aacom__primary-color);
      margin-bottom: var(--page-ok9aacom__spacing-large);
      text-transform: uppercase;
      font-weight: bold;
    }
    
    .page-ok9aacom__section-title span {
        color: var(--page-ok9aacom__secondary-color);
    }

    .page-ok9aacom__text-center {
      text-align: center;
    }

    /* Hero Section */
    .page-ok9aacom__hero-section {
      position: relative;
      padding-top: 150px; /* An toàn cho header cố định */
      padding-bottom: var(--page-ok9aacom__spacing-large);
      background-color: #0d0d0d;
      overflow: hidden;
    }

    .page-ok9aacom__hero-image-wrapper {
        width: 100%;
        max-width: 100%;
        overflow: hidden;
        box-sizing: border-box;
        display: flex;
        justify-content: center;
        align-items: center;
        margin-bottom: var(--page-ok9aacom__spacing-medium);
    }

    .page-ok9aacom__hero-image {
        max-width: 100%;
        height: auto;
        display: block;
        border-radius: var(--page-ok9aacom__border-radius);
        box-shadow: 0 0 20px rgba(253, 216, 53, 0.5);
    }

    .page-ok9aacom__hero-content {
      position: relative;
      z-index: 2;
      padding: var(--page-ok9aacom__spacing-medium);
    }

    .page-ok9aacom__hero-title {
      font-size: 3em;
      color: var(--page-ok9aacom__primary-color);
      margin-bottom: var(--page-ok9aacom__spacing-small);
      text-shadow: 2px 2px 4px rgba(0, 0, 0, 0.7);
    }

    .page-ok9aacom__hero-subtitle {
      font-size: 1.5em;
      color: var(--page-ok9aacom__secondary-color);
      margin-bottom: var(--page-ok9aacom__spacing-large);
    }

    .page-ok9aacom__cta-button {
      display: inline-block;
      background-color: var(--page-ok9aacom__primary-color);
      color: var(--page-ok9aacom__dark-background);
      padding: 15px 30px;
      border-radius: 50px;
      font-size: 1.2em;
      font-weight: bold;
      text-transform: uppercase;
      transition: background-color 0.3s ease, transform 0.3s ease;
      box-shadow: 0 4px 15px rgba(253, 216, 53, 0.4);
    }

    .page-ok9aacom__cta-button:hover {
      background-color: #ffd700;
      transform: translateY(-3px);
    }

    /* Floating Login Button */
    .page-ok9aacom__floating-button {
      position: fixed;
      bottom: 20px;
      right: 20px;
      background-color: #e53935; /* Màu đỏ nổi bật */
      color: var(--page-ok9aacom__secondary-color);
      padding: 12px 20px;
      border-radius: 50px;
      font-size: 1.1em;
      font-weight: bold;
      text-align: center;
      box-shadow: 0 4px 15px rgba(0, 0, 0, 0.4);
      z-index: 1000;
      animation: page-ok9aacom__pulse 2s infinite;
    }

    .page-ok9aacom__floating-button:hover {
      background-color: #c62828;
    }

    @keyframes page-ok9aacom__pulse {
      0% { transform: scale(1); }
      50% { transform: scale(1.05); }
      100% { transform: scale(1); }
    }

    /* Game Categories Section */
    .page-ok9aacom__game-grid {
      display: grid;
      grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
      gap: var(--page-ok9aacom__spacing-medium);
      margin-top: var(--page-ok9aacom__spacing-large);
    }

    .page-ok9aacom__game-item {
      background-color: #1a1a1a;
      padding: var(--page-ok9aacom__spacing-medium);
      border-radius: var(--page-ok9aacom__border-radius);
      box-shadow: 0 4px 10px rgba(0, 0, 0, 0.3);
      text-align: center;
      transition: transform 0.3s ease, box-shadow 0.3s ease;
    }

    .page-ok9aacom__game-item:hover {
      transform: translateY(-5px);
      box-shadow: 0 8px 20px rgba(253, 216, 53, 0.3);
    }

    .page-ok9aacom__game-icon-wrapper {
        width: 100%;
        max-width: 100%;
        overflow: hidden;
        box-sizing: border-box;
        margin-bottom: var(--page-ok9aacom__spacing-small);
        display: flex;
        justify-content: center;
        align-items: center;
    }
    
    .page-ok9aacom__game-icon {
      width: 100%; /* Đảm bảo hình ảnh lấp đầy chiều rộng của wrapper */
      max-width: 250px; /* Giới hạn kích thước tối đa cho hình ảnh game */
      height: auto;
      border-radius: var(--page-ok9aacom__border-radius);
    }

    .page-ok9aacom__game-title {
      font-size: 1.1em;
      font-weight: bold;
      color: var(--page-ok9aacom__secondary-color);
      margin-top: var(--page-ok9aacom__spacing-small);
    }

    /* Promotion Section */
    .page-ok9aacom__promo-card {
      background-color: #1a1a1a;
      padding: var(--page-ok9aacom__spacing-medium);
      border-radius: var(--page-ok9aacom__border-radius);
      margin-bottom: var(--page-ok9aacom__spacing-medium);
      box-shadow: 0 4px 10px rgba(0, 0, 0, 0.3);
      text-align: left;
    }

    .page-ok9aacom__promo-card-image-wrapper {
        width: 100%;
        max-width: 100%;
        overflow: hidden;
        box-sizing: border-box;
        margin-bottom: var(--page-ok9aacom__spacing-small);
        display: flex;
        justify-content: center;
        align-items: center;
    }

    .page-ok9aacom__promo-card-image {
        max-width: 100%;
        height: auto;
        border-radius: var(--page-ok9aacom__border-radius);
    }

    .page-ok9aacom__promo-title {
      color: var(--page-ok9aacom__primary-color);
      font-size: 1.8em;
      margin-bottom: var(--page-ok9aacom__spacing-small);
    }

    .page-ok9aacom__promo-description {
      color: var(--page-ok9aacom__text-color);
      margin-bottom: var(--page-ok9aacom__spacing-medium);
    }

    /* Guide Section */
    .page-ok9aacom__guide-step {
      background-color: #1a1a1a;
      padding: var(--page-ok9aacom__spacing-medium);
      border-radius: var(--page-ok9aacom__border-radius);
      margin-bottom: var(--page-ok9aacom__spacing-medium);
      text-align: left;
      box-shadow: 0 4px 10px rgba(0, 0, 0, 0.3);
    }

    .page-ok9aacom__guide-step-title {
      color: var(--page-ok9aacom__primary-color);
      font-size: 1.5em;
      margin-bottom: var(--page-ok9aacom__spacing-small);
    }

    .page-ok9aacom__guide-step-image-wrapper {
        width: 100%;
        max-width: 100%;
        overflow: hidden;
        box-sizing: border-box;
        margin-bottom: var(--page-ok9aacom__spacing-small);
        display: flex;
        justify-content: center;
        align-items: center;
    }

    .page-ok9aacom__guide-step-image {
        max-width: 100%;
        height: auto;
        border-radius: var(--page-ok9aacom__border-radius);
    }

    /* FAQ Section */
    .page-ok9aacom__faq-list {
      margin-top: var(--page-ok9aacom__spacing-large);
      text-align: left;
    }

    .page-ok9aacom__faq-item {
      background-color: #1a1a1a;
      margin-bottom: var(--page-ok9aacom__spacing-small);
      border-radius: var(--page-ok9aacom__border-radius);
      box-shadow: 0 2px 8px rgba(0, 0, 0, 0.2);
      overflow: hidden;
    }

    .page-ok9aacom__faq-question {
      display: flex;
      justify-content: space-between;
      align-items: center;
      padding: 15px 20px;
      cursor: pointer;
      user-select: none;
      background-color: #222;
      color: var(--page-ok9aacom__secondary-color);
      border-bottom: 1px solid #333;
      transition: background-color 0.3s ease;
    }

    .page-ok9aacom__faq-question:hover {
      background-color: #333;
    }

    .page-ok9aacom__faq-question h3 {
      margin: 0;
      font-size: 1.2em;
      color: var(--page-ok9aacom__primary-color);
      pointer-events: none; /* Ngăn chặn sự kiện click trên h3 */
    }

    .page-ok9aacom__faq-toggle {
      font-size: 1.5em;
      font-weight: bold;
      color: var(--page-ok9aacom__primary-color);
      transition: transform 0.3s ease;
      pointer-events: none; /* Ngăn chặn sự kiện click trên toggle */
    }

    .page-ok9aacom__faq-item.active .page-ok9aacom__faq-toggle {
      transform: rotate(45deg); /* Chuyển '+' thành 'x' hoặc '-' */
    }
    
    .page-ok9aacom__faq-answer {
      max-height: 0;
      overflow: hidden;
      padding: 0 20px;
      opacity: 0;
      transition: max-height 0.4s cubic-bezier(0.4, 0, 0.2, 1), padding 0.4s ease, opacity 0.4s ease;
      color: var(--page-ok9aacom__text-color);
    }

    .page-ok9aacom__faq-item.active .page-ok9aacom__faq-answer {
      max-height: 2000px !important; /* Đủ lớn để chứa mọi nội dung */
      padding: 20px !important;
      opacity: 1;
    }

    /* General Content */
    .page-ok9aacom__content-block {
      background-color: #1a1a1a;
      padding: var(--page-ok9aacom__spacing-medium);
      border-radius: var(--page-ok9aacom__border-radius);
      margin-bottom: var(--page-ok9aacom__spacing-medium);
      box-shadow: 0 4px 10px rgba(0, 0, 0, 0.3);
      text-align: left;
    }

    .page-ok9aacom__content-block h3 {
      color: var(--page-ok9aacom__primary-color);
      margin-bottom: var(--page-ok9aacom__spacing-small);
      font-size: 1.6em;
    }

    .page-ok9aacom__content-block ul {
      list-style: disc;
      padding-left: 25px;
      margin-bottom: var(--page-ok9aacom__spacing-small);
    }

    .page-ok9aacom__content-block ol {
      list-style: decimal;
      padding-left: 25px;
      margin-bottom: var(--page-ok9aacom__spacing-small);
    }

    .page-ok9aacom__content-block li {
      margin-bottom: 8px;
    }

    .page-ok9aacom__image-full-width-wrapper {
        width: 100%;
        max-width: 100%;
        overflow: hidden;
        box-sizing: border-box;
        margin-bottom: var(--page-ok9aacom__spacing-medium);
        display: flex;
        justify-content: center;
        align-items: center;
    }

    .page-ok9aacom__image-full-width {
        max-width: 100%;
        height: auto;
        border-radius: var(--page-ok9aacom__border-radius);
    }

    /* Responsive Design */
    @media (max-width: 768px) {
      .page-ok9aacom__container {
        padding: 0 var(--page-ok9aacom__spacing-small);
      }

      .page-ok9aacom__hero-section {
        padding-top: 150px; /* Vẫn giữ cho mobile */
      }

      .page-ok9aacom__hero-title {
        font-size: 2.2em;
      }

      .page-ok9aacom__hero-subtitle {
        font-size: 1.2em;
      }

      .page-ok9aacom__cta-button {
        padding: 12px 25px;
        font-size: 1em;
      }

      .page-ok9aacom__section-title {
        font-size: 2em;
      }

      .page-ok9aacom__game-grid {
        grid-template-columns: repeat(auto-fit, minmax(120px, 1fr));
      }
      
      .page-ok9aacom__game-icon {
        max-width: 150px; /* Giảm kích thước icon game trên mobile */
      }

      .page-ok9aacom__game-title {
        font-size: 0.9em;
      }

      .page-ok9aacom__promo-title {
        font-size: 1.5em;
      }

      .page-ok9aacom__guide-step-title {
        font-size: 1.3em;
      }

      .page-ok9aacom__faq-question h3 {
        font-size: 1.1em;
      }
      
      /* Responsive image optimization for all images */
      .page-ok9aacom img {
        max-width: 100% !important; 
        height: auto !important;
      }
      .page-ok9aacom__hero-image-wrapper,
      .page-ok9aacom__game-icon-wrapper,
      .page-ok9aacom__promo-card-image-wrapper,
      .page-ok9aacom__guide-step-image-wrapper,
      .page-ok9aacom__image-full-width-wrapper {
        width: 100% !important; 
        max-width: 100% !important; 
        overflow: hidden !important; 
        box-sizing: border-box !important;
      }
    }