:root {
      --page-xn88app-primary-color: #007bff; /* Xanh dương */
      --page-xn88app-secondary-color: #6c757d; /* Xám */
      --page-xn88app-accent-color: #ffc107; /* Vàng */
      --page-xn88app-text-color: #333; /* Đen */
      --page-xn88app-bg-color: #f8f9fa; /* Trắng nhạt */
      --page-xn88app-light-bg: #ffffff; /* Trắng */
      --page-xn88app-dark-bg: #343a40; /* Đen đậm */
      --page-xn88app-border-color: #dee2e6; /* Xám nhạt */
      --page-xn88app-success-color: #28a745; /* Xanh lá */
      --page-xn88app-danger-color: #dc3545; /* Đỏ */
    }

    .page-xn88app {
      font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
      line-height: 1.6;
      color: var(--page-xn88app-text-color);
      background-color: var(--page-xn88app-bg-color);
      padding: 0;
      margin: 0;
      overflow-x: hidden;
    }

    .page-xn88app__container {
      max-width: 1200px;
      margin: 0 auto;
      padding: 20px 15px;
    }

    .page-xn88app__hero-section {
      background: linear-gradient(rgba(0, 0, 0, 0.5), rgba(0, 0, 0, 0.7)), url('[GALLERY:banner:xn88app,ios,mobile,banner]') no-repeat center center/cover;
      color: #fff;
      text-align: center;
      padding: 10px 15px 80px; /* Adjusted padding-top for fixed header */
      min-height: 450px;
      display: flex;
      flex-direction: column;
      justify-content: center;
      align-items: center;
      position: relative;
    }

    .page-xn88app__hero-content {
      max-width: 800px;
      margin-top: 50px; /* Ensure content is below the header */
    }

    .page-xn88app__hero-title {
      font-size: 2.8em;
      margin-bottom: 15px;
      font-weight: 700;
      line-height: 1.2;
      color: var(--page-xn88app-accent-color);
      text-shadow: 2px 2px 4px rgba(0, 0, 0, 0.7);
    }

    .page-xn88app__hero-description {
      font-size: 1.2em;
      margin-bottom: 30px;
      color: #e0e0e0;
      text-shadow: 1px 1px 3px rgba(0, 0, 0, 0.5);
    }

    .page-xn88app__download-button {
      display: inline-block;
      background-color: var(--page-xn88app-success-color);
      color: #fff;
      padding: 15px 30px;
      border-radius: 50px;
      font-size: 1.1em;
      font-weight: bold;
      text-decoration: none;
      transition: background-color 0.3s ease, transform 0.3s ease;
      border: none;
      cursor: pointer;
      box-shadow: 0 4px 8px rgba(0, 0, 0, 0.2);
    }

    .page-xn88app__download-button:hover {
      background-color: #218838;
      transform: translateY(-3px);
    }

    .page-xn88app__section {
      padding: 60px 0;
      background-color: var(--page-xn88app-light-bg);
      border-bottom: 1px solid var(--page-xn88app-border-color);
    }

    .page-xn88app__section:nth-of-type(even) {
      background-color: var(--page-xn88app-bg-color);
    }

    .page-xn88app__section-title {
      font-size: 2.2em;
      color: var(--page-xn88app-primary-color);
      text-align: center;
      margin-bottom: 40px;
      font-weight: 700;
      position: relative;
    }

    .page-xn88app__section-title::after {
      content: '';
      width: 80px;
      height: 4px;
      background-color: var(--page-xn88app-accent-color);
      position: absolute;
      bottom: -10px;
      left: 50%;
      transform: translateX(-50%);
      border-radius: 2px;
    }

    .page-xn88app__grid {
      display: grid;
      grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
      gap: 30px;
      margin-top: 40px;
    }

    .page-xn88app__card {
      background-color: #fff;
      border-radius: 10px;
      box-shadow: 0 4px 15px rgba(0, 0, 0, 0.1);
      padding: 30px;
      text-align: center;
      transition: transform 0.3s ease, box-shadow 0.3s ease;
      border: 1px solid var(--page-xn88app-border-color);
      display: flex;
      flex-direction: column;
      align-items: center;
      justify-content: flex-start;
    }

    .page-xn88app__card:hover {
      transform: translateY(-10px);
      box-shadow: 0 8px 25px rgba(0, 0, 0, 0.15);
    }

    .page-xn88app__card-image {
      width: 100%;
      max-width: 250px;
      height: auto;
      border-radius: 8px;
      margin-bottom: 20px;
      object-fit: cover;
      max-height: 180px;
    }

    .page-xn88app__card-title {
      font-size: 1.4em;
      color: var(--page-xn88app-primary-color);
      margin-bottom: 15px;
      font-weight: 600;
    }

    .page-xn88app__card-description {
      font-size: 1em;
      color: var(--page-xn88app-secondary-color);
      flex-grow: 1;
    }

    .page-xn88app__step-list {
      list-style: none;
      padding: 0;
      margin: 0;
    }

    .page-xn88app__step-item {
      display: flex;
      align-items: flex-start;
      margin-bottom: 30px;
      padding: 20px;
      background-color: var(--page-xn88app-light-bg);
      border-radius: 8px;
      box-shadow: 0 2px 10px rgba(0, 0, 0, 0.05);
      border-left: 5px solid var(--page-xn88app-primary-color);
    }

    .page-xn88app__step-number {
      font-size: 2.2em;
      font-weight: bold;
      color: var(--page-xn88app-accent-color);
      margin-right: 20px;
      flex-shrink: 0;
    }

    .page-xn88app__step-content h3 {
      margin-top: 0;
      font-size: 1.3em;
      color: var(--page-xn88app-primary-color);
    }

    .page-xn88app__step-content p {
      margin-bottom: 0;
      color: var(--page-xn88app-text-color);
    }

    .page-xn88app__game-grid {
      display: grid;
      grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
      gap: 20px;
      margin-top: 40px;
    }

    .page-xn88app__game-card {
      background-color: #fff;
      border-radius: 8px;
      box-shadow: 0 2px 10px rgba(0, 0, 0, 0.08);
      text-align: center;
      padding: 15px;
      transition: transform 0.2s ease;
    }

    .page-xn88app__game-card:hover {
      transform: translateY(-5px);
    }

    .page-xn88app__game-image {
      width: 100%;
      max-width: 150px;
      height: auto;
      object-fit: cover;
      border-radius: 5px;
      margin-bottom: 10px;
    }

    .page-xn88app__game-title {
      font-size: 1.1em;
      font-weight: 600;
      color: var(--page-xn88app-text-color);
    }

    .page-xn88app__promotion-banner {
      background-color: var(--page-xn88app-primary-color);
      color: #fff;
      padding: 40px 20px;
      text-align: center;
      border-radius: 10px;
      margin-top: 40px;
      box-shadow: 0 5px 20px rgba(0, 0, 0, 0.2);
    }

    .page-xn88app__promotion-title {
      font-size: 2.5em;
      margin-bottom: 15px;
      font-weight: 700;
    }

    .page-xn88app__promotion-text {
      font-size: 1.3em;
      margin-bottom: 30px;
    }

    .page-xn88app__promotion-button {
      background-color: var(--page-xn88app-accent-color);
      color: var(--page-xn88app-text-color);
      padding: 15px 35px;
      border-radius: 50px;
      font-size: 1.2em;
      font-weight: bold;
      text-decoration: none;
      transition: background-color 0.3s ease, transform 0.3s ease;
      border: none;
      cursor: pointer;
      box-shadow: 0 4px 8px rgba(0, 0, 0, 0.2);
    }

    .page-xn88app__promotion-button:hover {
      background-color: #e0a800;
      transform: translateY(-3px);
    }

    .page-xn88app__faq-list {
      list-style: none;
      padding: 0;
      margin-top: 40px;
    }

    .page-xn88app__faq-item {
      background-color: var(--page-xn88app-light-bg);
      border: 1px solid var(--page-xn88app-border-color);
      border-radius: 8px;
      margin-bottom: 15px;
      overflow: hidden;
      box-shadow: 0 2px 8px rgba(0, 0, 0, 0.05);
    }

    .page-xn88app__faq-question {
      display: flex;
      justify-content: space-between;
      align-items: center;
      padding: 20px 25px;
      cursor: pointer;
      background-color: #f2f2f2;
      border-bottom: 1px solid var(--page-xn88app-border-color);
      transition: background-color 0.3s ease;
      user-select: none;
    }

    .page-xn88app__faq-question:hover {
      background-color: #e9e9e9;
    }

    .page-xn88app__faq-question h3 {
      margin: 0;
      font-size: 1.2em;
      color: var(--page-xn88app-primary-color);
      pointer-events: none; /* Prevent h3 from blocking click event */
    }

    .page-xn88app__faq-toggle {
      font-size: 1.8em;
      font-weight: bold;
      color: var(--page-xn88app-primary-color);
      transition: transform 0.3s ease;
      pointer-events: none; /* Prevent toggle from blocking click event */
    }

    .page-xn88app__faq-item.active .page-xn88app__faq-toggle {
      transform: rotate(45deg); /* Change + to X or similar */
      content: '−';
    }

    .page-xn88app__faq-answer {
      max-height: 0;
      overflow: hidden;
      padding: 0 25px;
      transition: max-height 0.4s cubic-bezier(0.4, 0, 0.2, 1), padding 0.4s ease, opacity 0.4s ease;
      opacity: 0;
      color: var(--page-xn88app-text-color);
    }

    .page-xn88app__faq-item.active .page-xn88app__faq-answer {
      max-height: 2000px !important; /* Sufficiently large to contain content */
      padding: 20px 25px !important;
      opacity: 1;
    }

    .page-xn88app__cta-section {
      text-align: center;
      padding: 80px 15px;
      background-color: var(--page-xn88app-dark-bg);
      color: #fff;
    }

    .page-xn88app__cta-title {
      font-size: 2.5em;
      margin-bottom: 20px;
      font-weight: 700;
      color: var(--page-xn88app-accent-color);
    }

    .page-xn88app__cta-description {
      font-size: 1.2em;
      margin-bottom: 40px;
      max-width: 800px;
      margin-left: auto;
      margin-right: auto;
    }

    /* Responsive adjustments */
    @media (max-width: 768px) {
      .page-xn88app__hero-title {
        font-size: 2.2em;
      }

      .page-xn88app__hero-description {
        font-size: 1em;
      }

      .page-xn88app__download-button,
      .page-xn88app__promotion-button {
        padding: 12px 25px;
        font-size: 1em;
      }

      .page-xn88app__section-title {
        font-size: 1.8em;
      }

      .page-xn88app__grid,
      .page-xn88app__game-grid {
        grid-template-columns: 1fr;
      }

      .page-xn88app__step-item {
        flex-direction: column;
        align-items: center;
        text-align: center;
      }

      .page-xn88app__step-number {
        margin-right: 0;
        margin-bottom: 10px;
      }

      .page-xn88app__promotion-title {
        font-size: 2em;
      }

      .page-xn88app__promotion-text {
        font-size: 1.1em;
      }

      .page-xn88app__faq-question {
        padding: 15px 20px;
      }

      .page-xn88app__faq-question h3 {
        font-size: 1.1em;
      }

      .page-xn88app__faq-answer {
        padding: 0 20px;
      }

      .page-xn88app__faq-item.active .page-xn88app__faq-answer {
        padding: 15px 20px !important;
      }

      .page-xn88app__cta-title {
        font-size: 2em;
      }

      .page-xn88app__cta-description {
        font-size: 1em;
      }

      /* Image responsive optimization for mobile */
      .page-xn88app img {
        max-width: 100% !important;
        height: auto !important;
      }

      .page-xn88app__card-image,
      .page-xn88app__game-image {
        max-width: 100% !important; /* Override max-width for mobile */
        height: auto !important;
      }

      .page-xn88app__card {
        padding: 20px;
      }
    }

    @media (max-width: 480px) {
      .page-xn88app__hero-title {
        font-size: 1.8em;
      }
    }

    /* General image container and image styling for responsiveness */
    .page-xn88app__img-wrapper {
      width: 100%;
      max-width: 100%;
      overflow: hidden;
      box-sizing: border-box;
      display: flex;
      justify-content: center;
      align-items: center;
    }

    .page-xn88app img {
      max-width: 100%;
      height: auto;
      display: block;
    }