:root {
      --page-xx88__primary-color: #e44d26; /* Cam đỏ */
      --page-xx88__secondary-color: #ffb74d; /* Cam nhạt */
      --page-xx88__accent-color: #4CAF50; /* Xanh lá */
      --page-xx88__dark-bg: #1a1a1a; /* Nền tối */
      --page-xx88__light-text: #ffffff; /* Chữ sáng */
      --page-xx88__dark-text: #333333; /* Chữ tối */
      --page-xx88__card-bg: #2a2a2a; /* Nền thẻ */
      --page-xx88__border-color: #444444; /* Màu viền */
      --page-xx88__header-height-desktop: 120px;
      --page-xx88__header-height-mobile: 100px;
    }

    .page-xx88 {
      font-family: 'Arial', sans-serif;
      color: var(--page-xx88__light-text);
      background-color: var(--page-xx88__dark-bg);
      line-height: 1.6;
    }

    .page-xx88__section {
      padding: 40px 20px;
      margin: 0 auto;
      max-width: 1200px;
      box-sizing: border-box;
    }

    .page-xx88__hero-section {
      text-align: center;
      padding: var(--page-xx88__header-height-desktop) 20px 60px; /* Thêm padding-top để tránh bị che bởi header cố định */
      background-color: #0d0d0d;
      position: relative;
      overflow: hidden;
    }

    .page-xx88__hero-image {
      width: 100%;
      max-width: 100%;
      height: auto;
      display: block;
      margin: 0 auto;
      border-radius: 10px;
      box-shadow: 0 8px 16px rgba(0, 0, 0, 0.4);
    }

    .page-xx88__hero-content {
      position: relative;
      z-index: 1;
      margin-top: 30px;
    }

    .page-xx88__main-heading {
      font-size: 3.2em;
      color: var(--page-xx88__primary-color);
      margin-bottom: 20px;
      text-shadow: 2px 2px 4px rgba(0, 0, 0, 0.7);
    }

    .page-xx88__sub-heading {
      font-size: 1.5em;
      color: var(--page-xx88__light-text);
      margin-bottom: 30px;
    }

    .page-xx88__button {
      display: inline-block;
      background-color: var(--page-xx88__primary-color);
      color: var(--page-xx88__light-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 8px rgba(0, 0, 0, 0.3);
      border: none;
      cursor: pointer;
    }

    .page-xx88__button:hover {
      background-color: #d13a17;
      transform: translateY(-2px);
    }

    .page-xx88__title {
      font-size: 2.5em;
      color: var(--page-xx88__primary-color);
      text-align: center;
      margin-bottom: 40px;
      position: relative;
      padding-bottom: 15px;
    }

    .page-xx88__title::after {
      content: '';
      position: absolute;
      left: 50%;
      bottom: 0;
      transform: translateX(-50%);
      width: 80px;
      height: 4px;
      background-color: var(--page-xx88__secondary-color);
      border-radius: 2px;
    }

    .page-xx88__grid {
      display: grid;
      grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
      gap: 30px;
    }

    .page-xx88__card {
      background-color: var(--page-xx88__card-bg);
      border-radius: 10px;
      overflow: hidden;
      box-shadow: 0 6px 12px rgba(0, 0, 0, 0.4);
      transition: transform 0.3s ease, box-shadow 0.3s ease;
      text-align: center;
      border: 1px solid var(--page-xx88__border-color);
    }

    .page-xx88__card:hover {
      transform: translateY(-5px);
      box-shadow: 0 10px 20px rgba(0, 0, 0, 0.6);
    }

    .page-xx88__card-image {
      width: 100%;
      max-width: 100%;
      height: 200px;
      object-fit: cover;
      display: block;
      border-bottom: 1px solid var(--page-xx88__border-color);
    }
    
    .page-xx88__card-gamelogo {
      width: 100%;
      max-width: 100%;
      height: 120px; /* Smaller height for game logos */
      object-fit: contain; /* Ensure full logo is visible */
      background-color: #333;
      padding: 15px;
      box-sizing: border-box;
      border-bottom: 1px solid var(--page-xx88__border-color);
    }

    .page-xx88__card-content {
      padding: 20px;
    }

    .page-xx88__card-title {
      font-size: 1.4em;
      color: var(--page-xx88__secondary-color);
      margin-bottom: 10px;
      min-height: 40px; /* Ensure consistent height for titles */
    }

    .page-xx88__card-title a {
      color: var(--page-xx88__secondary-color);
      text-decoration: none;
      transition: color 0.3s ease;
    }

    .page-xx88__card-title a:hover {
      color: var(--page-xx88__primary-color);
    }

    .page-xx88__card-description {
      font-size: 0.95em;
      color: #cccccc;
    }

    .page-xx88__text-content {
      font-size: 1.1em;
      color: #e0e0e0;
      text-align: justify;
    }

    .page-xx88__text-content h2 {
      color: var(--page-xx88__primary-color);
      font-size: 2em;
      margin-top: 40px;
      margin-bottom: 20px;
    }

    .page-xx88__text-content h3 {
      color: var(--page-xx88__secondary-color);
      font-size: 1.5em;
      margin-top: 30px;
      margin-bottom: 15px;
    }

    .page-xx88__text-content p {
      margin-bottom: 15px;
    }

    .page-xx88__text-content ul {
      list-style-type: disc;
      margin-left: 20px;
      margin-bottom: 20px;
    }

    .page-xx88__text-content ol {
      list-style-type: decimal;
      margin-left: 20px;
      margin-bottom: 20px;
    }

    .page-xx88__text-content li {
      margin-bottom: 8px;
      color: #e0e0e0;
    }

    .page-xx88__app-download-section {
      text-align: center;
      background-color: #0d0d0d;
      padding: 60px 20px;
    }

    .page-xx88__qr-code-grid {
      display: flex;
      justify-content: center;
      flex-wrap: wrap;
      gap: 30px;
      margin-top: 30px;
    }

    .page-xx88__qr-item {
      text-align: center;
      background-color: var(--page-xx88__card-bg);
      padding: 20px;
      border-radius: 10px;
      box-shadow: 0 4px 8px rgba(0, 0, 0, 0.3);
      border: 1px solid var(--page-xx88__border-color);
    }

    .page-xx88__qr-image {
      width: 200px;
      height: 200px;
      object-fit: contain;
      margin-bottom: 15px;
      background-color: var(--page-xx88__light-text);
      border-radius: 5px;
    }

    .page-xx88__qr-label {
      font-size: 1.2em;
      color: var(--page-xx88__secondary-color);
      font-weight: bold;
    }

    .page-xx88__faq-section {
      background-color: #0d0d0d;
      padding: 60px 20px;
    }

    .page-xx88__faq-item {
      background-color: var(--page-xx88__card-bg);
      margin-bottom: 15px;
      border-radius: 8px;
      border: 1px solid var(--page-xx88__border-color);
      overflow: hidden;
      box-shadow: 0 2px 5px rgba(0, 0, 0, 0.2);
    }

    .page-xx88__faq-question {
      display: flex;
      justify-content: space-between;
      align-items: center;
      padding: 15px 20px;
      cursor: pointer;
      user-select: none;
      background-color: #333333;
      color: var(--page-xx88__light-text);
      font-weight: bold;
      font-size: 1.1em;
      transition: background-color 0.3s ease;
    }

    .page-xx88__faq-question:hover {
      background-color: #444444;
    }

    .page-xx88__faq-question h3 {
      margin: 0;
      color: var(--page-xx88__light-text);
      font-size: 1.1em;
      pointer-events: none; /* Prevent h3 from blocking click event */
    }

    .page-xx88__faq-toggle {
      font-size: 1.5em;
      line-height: 1;
      color: var(--page-xx88__primary-color);
      transition: transform 0.3s ease;
      pointer-events: none; /* Prevent toggle icon from blocking click event */
    }

    .page-xx88__faq-item.active .page-xx88__faq-toggle {
      transform: rotate(45deg); /* Change + to X or similar */
      color: var(--page-xx88__accent-color);
    }

    .page-xx88__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: #cccccc;
      background-color: var(--page-xx88__card-bg);
    }

    .page-xx88__faq-item.active .page-xx88__faq-answer {
      max-height: 2000px !important; /* Sufficiently large to contain content */
      padding: 20px !important;
      opacity: 1;
    }

    .page-xx88__floating-button {
      position: fixed;
      bottom: 20px;
      right: 20px;
      background-color: var(--page-xx88__accent-color);
      color: var(--page-xx88__light-text);
      padding: 15px 25px;
      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, 0, 0, 0.5);
      z-index: 1000;
      display: none; /* Hidden by default, shown on mobile */
      text-align: center;
      white-space: nowrap;
    }

    .page-xx88__floating-button:hover {
      background-color: #43a047;
      transform: translateY(-3px);
    }

    /* Responsive adjustments */
    @media (max-width: 768px) {
      .page-xx88__hero-section {
        padding-top: var(--page-xx88__header-height-mobile);
        padding-bottom: 40px;
      }

      .page-xx88__main-heading {
        font-size: 2.2em;
      }

      .page-xx88__sub-heading {
        font-size: 1.2em;
      }

      .page-xx88__title {
        font-size: 2em;
        margin-bottom: 30px;
      }

      .page-xx88__section {
        padding: 30px 15px;
      }

      .page-xx88__card-image,
      .page-xx88__card-gamelogo,
      .page-xx88__qr-image {
        max-width: 100% !important;
        height: auto !important;
      }

      .page-xx88__card-gamelogo {
        height: 100px;
      }

      .page-xx88__qr-image {
        width: 150px;
        height: 150px;
      }

      .page-xx88__floating-button {
        display: block; /* Show on mobile */
        font-size: 1em;
        padding: 12px 20px;
        bottom: 15px;
        right: 15px;
      }

      .page-xx88__faq-question {
        font-size: 1em;
        padding: 12px 15px;
      }

      .page-xx88__faq-answer {
        padding: 0 15px;
      }

      .page-xx88__faq-item.active .page-xx88__faq-answer {
        padding: 15px !important;
      }
    }