:root {
      --page-xs66app__primary-color: #e44d26; /* Cam đỏ */
      --page-xs66app__secondary-color: #333; /* Đen xám */
      --page-xs66app__accent-color: #f7b731; /* Vàng */
      --page-xs66app__background-light: #f4f4f4; /* Nền sáng */
      --page-xs66app__background-dark: #2c3e50; /* Nền tối */
      --page-xs66app__text-light: #fff; /* Chữ sáng */
      --page-xs66app__text-dark: #333; /* Chữ tối */
      --page-xs66app__border-color: #ddd;
    }

    .page-xs66app {
      font-family: 'Arial', sans-serif;
      line-height: 1.6;
      color: var(--page-xs66app__text-dark);
      background-color: var(--page-xs66app__background-light);
      padding-bottom: 80px; /* Space for floating button */
    }

    .page-xs66app__section {
      padding: 40px 20px;
      max-width: 1200px;
      margin: 0 auto;
      text-align: center;
    }

    .page-xs66app__section--dark {
      background-color: var(--page-xs66app__background-dark);
      color: var(--page-xs66app__text-light);
    }

    .page-xs66app__hero-section {
      position: relative;
      background-color: var(--page-xs66app__background-dark);
      color: var(--page-xs66app__text-light);
      padding: 10px 0 60px 0; /* Adjusted padding-top for fixed header */
      text-align: center;
      overflow: hidden;
      display: flex;
      flex-direction: column;
      align-items: center;
      justify-content: center;
    }

    .page-xs66app__hero-image-container {
      width: 100%;
      max-width: 100%;
      overflow: hidden;
      box-sizing: border-box;
      margin-bottom: 20px;
    }

    .page-xs66app__hero-image {
      width: 100%;
      height: auto;
      display: block;
      object-fit: cover;
    }

    .page-xs66app__hero-content {
      position: relative;
      z-index: 2;
      padding: 0 20px;
      max-width: 800px;
      margin: 0 auto;
    }

    .page-xs66app__hero-title {
      font-size: 2.5em;
      margin-bottom: 15px;
      color: var(--page-xs66app__accent-color);
      text-shadow: 2px 2px 4px rgba(0,0,0,0.5);
      word-wrap: break-word;
      overflow-wrap: break-word;
      word-break: break-word;
    }

    .page-xs66app__hero-subtitle {
      font-size: 1.2em;
      margin-bottom: 30px;
      word-wrap: break-word;
      overflow-wrap: break-word;
      word-break: break-word;
    }

    .page-xs66app__cta-button {
      display: inline-block;
      background-color: var(--page-xs66app__primary-color);
      color: var(--page-xs66app__text-light);
      padding: 15px 30px;
      border-radius: 8px;
      text-decoration: none;
      font-weight: bold;
      font-size: 1.1em;
      transition: background-color 0.3s ease, transform 0.3s ease;
      cursor: pointer;
      border: none;
    }

    .page-xs66app__cta-button:hover {
      background-color: #c43d1a;
      transform: translateY(-2px);
    }

    .page-xs66app__floating-button {
      position: fixed;
      bottom: 20px;
      left: 50%;
      transform: translateX(-50%);
      background-color: var(--page-xs66app__accent-color);
      color: var(--page-xs66app__secondary-color);
      padding: 15px 25px;
      border-radius: 50px;
      font-weight: bold;
      font-size: 1.1em;
      box-shadow: 0 4px 15px rgba(0,0,0,0.2);
      z-index: 1000;
      cursor: pointer;
      border: none;
      white-space: nowrap;
      text-align: center;
      transition: background-color 0.3s ease, transform 0.3s ease;
      max-width: calc(100% - 40px);
      box-sizing: border-box;
    }

    .page-xs66app__floating-button:hover {
      background-color: #e0a328;
      transform: translateX(-50%) translateY(-3px);
    }

    .page-xs66app__title {
      font-size: 2em;
      margin-bottom: 20px;
      color: var(--page-xs66app__primary-color);
      word-wrap: break-word;
      overflow-wrap: break-word;
      word-break: break-word;
    }

    .page-xs66app__subtitle {
      font-size: 1.2em;
      margin-bottom: 30px;
      color: var(--page-xs66app__secondary-color);
      word-wrap: break-word;
      overflow-wrap: break-word;
      word-break: break-word;
    }

    .page-xs66app__feature-grid,
    .page-xs66app__game-grid {
      display: grid;
      grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
      gap: 30px;
      margin-top: 30px;
      list-style: none;
      padding: 0;
    }

    .page-xs66app__feature-item,
    .page-xs66app__game-card {
      background-color: #fff;
      padding: 25px;
      border-radius: 10px;
      box-shadow: 0 4px 15px rgba(0,0,0,0.1);
      text-align: center;
      transition: transform 0.3s ease, box-shadow 0.3s ease;
      box-sizing: border-box;
    }

    .page-xs66app__feature-item:hover,
    .page-xs66app__game-card:hover {
      transform: translateY(-5px);
      box-shadow: 0 8px 20px rgba(0,0,0,0.15);
    }

    .page-xs66app__feature-icon-container,
    .page-xs66app__game-image-container {
      width: 100%;
      max-width: 100%;
      overflow: hidden;
      box-sizing: border-box;
      margin-bottom: 15px;
    }

    .page-xs66app__feature-icon,
    .page-xs66app__game-image {
      width: 100%;
      height: auto;
      max-height: 250px;
      object-fit: cover;
      border-radius: 8px;
    }

    .page-xs66app__feature-title,
    .page-xs66app__game-title {
      font-size: 1.4em;
      margin-bottom: 10px;
      color: var(--page-xs66app__primary-color);
      word-wrap: break-word;
      overflow-wrap: break-word;
      word-break: break-word;
    }

    .page-xs66app__feature-description,
    .page-xs66app__game-description {
      font-size: 0.95em;
      color: var(--page-xs66app__secondary-color);
      word-wrap: break-word;
      overflow-wrap: break-word;
      word-break: break-word;
    }

    .page-xs66app__steps-list {
      list-style: none;
      padding: 0;
      display: flex;
      flex-direction: column;
      gap: 20px;
      margin-top: 30px;
    }

    .page-xs66app__step-item {
      display: flex;
      align-items: flex-start;
      background-color: #fff;
      padding: 20px;
      border-radius: 8px;
      box-shadow: 0 2px 10px rgba(0,0,0,0.08);
      text-align: left;
      box-sizing: border-box;
    }

    .page-xs66app__step-number {
      font-size: 1.8em;
      font-weight: bold;
      color: var(--page-xs66app__primary-color);
      margin-right: 15px;
      flex-shrink: 0;
    }

    .page-xs66app__step-content {
      flex-grow: 1;
    }

    .page-xs66app__step-title {
      font-size: 1.2em;
      color: var(--page-xs66app__primary-color);
      margin-bottom: 5px;
      word-wrap: break-word;
      overflow-wrap: break-word;
      word-break: break-word;
    }

    .page-xs66app__step-description {
      font-size: 0.95em;
      color: var(--page-xs66app__secondary-color);
      word-wrap: break-word;
      overflow-wrap: break-word;
      word-break: break-word;
    }

    .page-xs66app__faq-section {
      background-color: var(--page-xs66app__background-light);
      padding: 40px 20px;
      max-width: 900px;
      margin: 40px auto;
      border-radius: 10px;
      box-shadow: 0 4px 20px rgba(0,0,0,0.05);
    }

    .page-xs66app__faq-item {
      border-bottom: 1px solid var(--page-xs66app__border-color);
      margin-bottom: 10px;
    }

    .page-xs66app__faq-item:last-child {
      border-bottom: none;
      margin-bottom: 0;
    }

    .page-xs66app__faq-question {
      display: flex;
      justify-content: space-between;
      align-items: center;
      padding: 15px 0;
      cursor: pointer;
      user-select: none;
      transition: background-color 0.3s ease;
    }

    .page-xs66app__faq-question:hover {
      background-color: #f9f9f9;
    }

    .page-xs66app__faq-question h3 {
      font-size: 1.1em;
      margin: 0;
      color: var(--page-xs66app__secondary-color);
      flex-grow: 1;
      text-align: left;
      pointer-events: none; /* Prevent h3 from blocking click event */
      word-wrap: break-word;
      overflow-wrap: break-word;
      word-break: break-word;
    }

    .page-xs66app__faq-toggle {
      font-size: 1.5em;
      font-weight: bold;
      color: var(--page-xs66app__primary-color);
      margin-left: 15px;
      transition: transform 0.3s ease;
      pointer-events: none; /* Prevent toggle from blocking click event */
    }

    .page-xs66app__faq-item.active .page-xs66app__faq-toggle {
      transform: rotate(45deg);
    }

    .page-xs66app__faq-answer {
      max-height: 0;
      overflow: hidden;
      padding: 0 15px;
      opacity: 0;
      transition: max-height 0.4s cubic-bezier(0.4, 0, 0.2, 1), padding 0.4s ease, opacity 0.4s ease;
      text-align: left;
      color: var(--page-xs66app__secondary-color);
      font-size: 0.95em;
    }

    .page-xs66app__faq-item.active .page-xs66app__faq-answer {
      max-height: 2000px !important; /* Sufficiently large */
      padding: 20px 15px !important;
      opacity: 1;
    }

    /* Responsive adjustments */
    @media (max-width: 768px) {
      .page-xs66app__hero-section {
        padding-top: 10px; /* Adjusted padding-top for fixed header on mobile */
      }

      .page-xs66app__hero-title {
        font-size: 1.8em;
      }

      .page-xs66app__hero-subtitle {
        font-size: 1em;
      }

      .page-xs66app__cta-button {
        padding: 12px 25px;
        font-size: 1em;
      }

      .page-xs66app__floating-button {
        width: calc(100% - 40px) !important;
        padding: 12px 20px;
        font-size: 0.95em;
        bottom: 15px;
      }

      .page-xs66app__section {
        padding: 30px 15px;
      }

      .page-xs66app__title {
        font-size: 1.6em;
      }

      .page-xs66app__subtitle {
        font-size: 1.1em;
      }

      .page-xs66app__feature-grid,
      .page-xs66app__game-grid {
        grid-template-columns: 1fr;
        gap: 20px;
      }

      .page-xs66app__feature-item,
      .page-xs66app__game-card,
      .page-xs66app__step-item,
      .page-xs66app__faq-item,
      .page-xs66app__faq-question,
      .page-xs66app__faq-answer {
        width: 100% !important;
        max-width: 100% !important;
        box-sizing: border-box !important;
        margin-left: 0 !important;
        margin-right: 0 !important;
        padding-left: 15px !important;
        padding-right: 15px !important;
      }

      .page-xs66app__feature-title,
      .page-xs66app__game-title {
        font-size: 1.2em;
      }

      .page-xs66app__feature-description,
      .page-xs66app__game-description,
      .page-xs66app__step-description,
      .page-xs66app__faq-answer {
        font-size: 0.9em;
      }

      .page-xs66app__step-item {
        flex-direction: column;
        align-items: flex-start;
        text-align: left;
      }

      .page-xs66app__step-number {
        margin-bottom: 10px;
      }

      .page-xs66app__faq-question h3 {
        font-size: 1em;
      }

      .page-xs66app__faq-toggle {
        font-size: 1.2em;
      }
    }